• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A dynamoelectric machine is provided which has high efficiency and can be used for medical treatment. The dynamoelectric machine includes: a permanent magnet (45) that circumferentially arranges a plurality of magnetic poles on an outer periphery thereof; a coil fixing member (41) having a cylindrical roller member (42) at a position where the cylindrical roller member (42) faces the permanent magnet (45) with an air gap formed therebetween; a cylindrical coil (44) formed by dropping a planar plate-shaped coil formed of a coil wound in the predetermined direction in the predetermined direction; and fixing the planar plate-shaped coil to an outer peripheral surface of the cylindrical one Roller member (42) such that the planar plate-shaped coil is brought into a circular ring shape; and a yoke (43) made of a magnetic material which is disposed at a position where the yoke (43) faces an outer peripheral surface of the cylindrical coil (44), and an outer member (50), the yoke (Fig. 43) is disposed on an inner periphery side of the outer member and the cylindrical coil (44) is disposed in a hermetically sealed space formed by the coil fixing member (41) and an outer member (50).
    公开号:AT511025A2
    申请号:T9371/2010
    申请日:2010-09-01
    公开日:2012-08-15
    发明作者:Shinji Kinoshita
    申请人:Seiko Instr Inc；Nakanishi Inc；
    IPC主号:
    专利说明:

    description
    TITLE OF THE INVENTION
    DYNAMOELECTRIC MACHINE AND HANDPIECE FOR DENTAL OR MEDICAL TREATMENT
    FIELD OF THE INVENTION
    [0001]
    The present invention relates to an ironless motor, which uses a cylindrical coil, which in medical treatment equipment, a
    Precision measuring instrument or the like is used, a dynamoelectric machine which is used as a power generator, and a handpiece for dental or medical treatment, which is provided with the dynamoelectric machine.
    STATE OF THE ART
    [0002]
    With regard to devices for medical treatment, in particular devices for medical treatment used in surgical operations, dental
    In order to prevent infection of a patient with bacteria, viruses or the like via the devices, sterilization treatment is applied to the medical treatment devices using pressurized high-temperature steam, for example, before and after the use of the device , Accordingly, it is necessary to construct a motor that is integrated into the above-mentioned medical treatment apparatus so that the engine can withstand the high-pressure steam under pressure while at the same time the i.v.
    Miniaturization is implemented. As a motor that meets such requirements, an engine is known in which several air coils between an outer
    Peripheral surface of a permanent magnet and a housing are arranged, which is arranged such that the housing facing the permanent magnet, with a gap formed therebetween, a film is mounted on the inner peripheral sides of the air coils, so that the air coils are protected from air, or the air coils are formed by a resin (Patent Document 1).
    [0003]
    In the engine is a thickness of the film on the inner
    Peripheral side of the air coils small and therefore, the gap between the permanent magnet and the
    Housing is made small, making the
    Motor can generate a large torque.
    [0004]
    In general, it is for generating a large magnetic flux in a motor, which is the coil for
    Generating a high torque couples, necessary to set a gap formed between a permanent magnet and a yoke, small. That is, the gap formed between the permanent magnet and the yoke is made small, so that the magnetic flux density of the permanent magnet is kept large, thereby increasing an effective magnetic flux in the gap. Due to such a structure, the generated torque of the engine is increased, so that the energy efficiency of the engine is improved. Conversely, when the gap is large, a magnetic flux of the permanent magnet that couples the coil decreases, thereby reducing the generated torque of the motor. 3
    DOCUMENT TO THE PRIOR ART
    Patent Document
    [0005]
    Patent Document 1: JP-A-2004-180457
    BRIEF SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED WITH THE INVENTION
    [0006]
    In the above motor, as shown in Fig. 9, the plural air coils are fixed on an outer peripheral surface of the film parallel to each other in the circumferential direction, and the air coils are covered with the film so that the air coils are shielded from the outside air. At a
    High temperature environment for the sterilization treatment expands air on the inside, which is covered with films, so that the film is deformed. Further, the air-core coil is formed by winding a self-fusing line into an approximately rectangular air-core shape, wherein the plurality of air-core coils 101, each consisting of a coil part 102 and an air core part 103, are arranged in the circumferential direction. Further, the air coil 101 forms a space in the air core part 103 and a space between one
    Air core part 102 and the other air core part 102. In this case, when the air coils are formed with a resin, a resin layer has a small thickness in the coil part of the air coil and has a high thickness in the air core part of the air coil and in the space between the one coil part and the other coil part , When the engine is left in an atmosphere of pressurized high temperature steam and the resin
    4, a portion of the resin layer having a greater thickness has the greater extent of the volume thereof, thereby deforming the film. Accordingly, there is a disadvantage that the film and the permanent magnet are brought into contact with each other due to the deformation of the film.
    [0007]
    Further, in order to prevent the film from coming into contact with the permanent magnet even if the film is deformed, it is necessary to avoid the deformation of the film by increasing the thickness of the film or by enlarging the gap existing between the film and the film Permanent magnet is formed. With this structure, there arises a disadvantage that the gap formed between the permanent magnet and the yoke increases, so that a magnetic flux in a magnetic field of a magnet becomes small, thereby reducing a generated torque of the motor.
    [0008]
    Further, the plural air coils are arranged in the circumferential direction, and therefore, irregularities occur in the arrangement pitch of the respective coils.
    Accordingly, the malady arises that the time for the power supply shifts, so that a generated torque of the motor decreases.
    The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a dynamoelectric machine which can be used even when the sterilization treatment is carried out by means of pressurized high-temperature steam, and can increase energy efficiency.
    MEANS TO SOLVE THE PROBLEMS
    [0009] m
    In order to achieve the above-mentioned object, a dynamoelectric machine according to the present invention is characterized by including: a permanent magnet which circumferentially arranges a plurality of magnetic poles on an outer periphery thereof; a coil fixing member having a cylindrical roller part at a position where the cylindrical roller part faces the permanent magnet with an air gap formed therebetween; a cylindrical coil formed by dropping a planar plate-shaped coil formed from a coil wound in the predetermined direction in the predetermined direction, and fixing the planar plate-shaped coil to an outer peripheral part of the cylindrical roller part such that the planar plate-shaped coil is brought into a circular-annular shape; and a yoke made of a magnetic material disposed at a position where the yoke faces an outer peripheral portion of the cylindrical coil, the cylindrical coil being disposed in a hermetically sealed space formed by the coil fastening member.
    When the coil is arranged in the hermetically sealed space and a volume of the hermetically sealed space is large, air expands due to a high temperature in the sterilizing treatment, and therefore the coil fixing member is deformed or broken. In the cylindrical coil of the present invention, however, the coils wound in polygonal shape are uniformly arranged in a cylindrical shape so that turns can be wound more tightly than air coils, whereby a thickness of the coil
    can be reduced in the radial direction. Accordingly, the volume of the hermetically sealed space of the coil can be made small, and thus the deformation or the breakage of the coil fixing member due to the expansion of air can be prevented. Further, since the deformation of the coil fixing member can be prevented, a thickness of the cylindrical roller part of the coil fixing member can be reduced. Accordingly, a gap formed between the permanent magnet and the yoke can be downsized, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the solenoid coil can increase the number of electrical wires of the coil compared to the air coil. Accordingly, in the solenoid, it is possible to arrange the required number of electric coil wires even if the number of layers of electric wires formed by overlapping the electric wires in the radial direction is small.
    Further, the dynamoelectric machine according to the present invention is characterized by incorporating an outer member provided on an outer peripheral side of the yoke.
    [0010]
    Furthermore, the dynamoelectric. Machine according to the present invention, characterized in that the hermetically sealed space is filled with a resin, at least in a region in which the hermetically sealed space covers the cylindrical coil.
    [0011]
    Due to the structure of the present invention, 7
    the air in the hermetically sealed space can be reduced, and therefore, the deformation or the breakage of the cylindrical roller member can be prevented even if air expands due to a high temperature in the sterilizing treatment. Further, since the deformation of the cylindrical roller member can be prevented, it is possible to reduce a thickness of the cylindrical roller member. Accordingly, a gap formed between the permanent magnet and the yoke can be downsized, thus increasing the energy efficiency of the dynamoelectric machine.
    [0012]
    Further, when a gap is formed in a hermetically sealed space so that high-temperature steam penetrates into a resin portion covering an air-core coil in the sterilizing treatment, there is a disadvantage in the prior art that the resin portion fitted to the air-core coil does not have a uniform thickness in the radial direction, so that the air-core coil is deformed or broken.
    In the solenoid of the present invention, however, the coil has a uniform thickness, and therefore, a thickness of the filled resin also becomes uniform, whereby the deformation or breakage of the cylindrical roller member upon swelling of the resin can be prevented. Further, since the deformation of the cylindrical roller member can be prevented, it is possible to reduce a thickness of the cylindrical roller member. Accordingly, a gap formed between the permanent magnet and the yoke can be downsized, thus increasing the energy efficiency of the dynamoelectric machine.
    8
    a * * «
    Further, the dynamoelectric machine according to the present invention is characterized in that the cylindrical coil is formed into a cylindrical shape such that turns wound around a polygonal winding frame are formed into a planar plate shape by dropping the turns toward the winding frame axis, and thereafter, the turns are wound around the outer peripheral part of the cylindrical roller part of the coil fixing member, and the cylindrical coil includes linear lead parts extending along the longitudinal direction of the permanent magnet.
    Here, the solenoid is explained. The cylindrical coil is a coil in which turns of which a round has a polygonal shape are arranged cylindrical in shape and roughly classified into the following three types. (1) hexagonal windings (Figure 3 {a}} (2) rhombic windings (Figure 3 (b)) (3) honeycomb windings (Figure 3 (c))
    The hexagonal turns are formed so that turns are formed from a self-fusing line, and coating sheets of the turns are fixed to each other by melting by means of heating or the like. In the hexagonal turns, portions of the turns are aligned with each other on a cylindrical axis, and therefore, linear line portions are in the direction of
    Cylinder axis, which contribute to the generation of a torque, in a central part of the cylindrical - 9 - 9 force, which is a torque the hexagonal among the three
    Windings present, whereby a magnetic pole experiences, effectively acting on. Accordingly, turns are considered to be the most efficient turns.
    On the other hand, the rhombic windings have no linear pipe sections in the direction of the cylinder axis, which contribute to a torque and are formed on an inclined pipe section as a whole, and therefore the utilization efficiency of the windings is small compared to the hexagonal windings. Accordingly, the rhombic windings are not a preferable winding method in terms of achieving high efficiency. Further, in the same manner as the rhombic windings, the honeycomb windings have no linear pipe sections in the cylinder axis direction contributing to torque, and therefore, the utilization efficiency of the windings is small compared to hexagonal windings.
    [0014]
    Hereinafter, a conventional method of forming a cylindrical coil which takes hexagonal turns will be explained in connection with FIG. 4 to FIG.
    [0015]
    Fig. 4 is a view for explaining a winding operation. The aligned windings 62 are wound around a winding frame 61 having a hexagonal shape, and the windings 62 are temporarily fixed to the winding frame 61 by a belt 63 in a state in which the windings 62 around the
    Wieklungsrahmen 61 are wound to prevent the collapse of the windings. In such a state, the windings 62 are from the ·· «
    Winding frame 61 removed, which has a hexagonal shape.
    [0016]
    Fig. 5 is a view for explaining an operation of forming the turns 62 into a planar plate shape. A pair of opposing faces of hexagonal shape of the turns 62 removed from the winding frame 61 are dropped toward the winding frame axis and the turns 62 are made into a planar plate shape.
    [0017]
    FIG. 6 is a view for explaining one
    Winding operation. The turns, which are brought into a planar plate shape, are wound around a winding rod 64. Here is a band around the outside
    Wrapped periphery of the coils, which are formed by curling.
    Fig. 7 is a view for explaining a curing operation. A cylindrical coil 65 formed by removing the winding rod 64 is heated, and the cylindrical coil 65 is pressed by a cylinder forming device for forming such that the degree of cylindricity of the cylinder
    Cylinder coil 65 is increased. The turns are formed of a self-fusing line, and therefore, the turns are melted together when heated, thereby preventing the coils from collapsing.
    [0018]
    The cylindrical coil which takes over the hexagonal turns is formed by the above steps.
    In the present invention, discarding a Einrolloperation and a hardening operation, which are carried out conventionally, the windings, which are wound around the polygonal winding frame, converted into a planar plate shape by causing the windings fall in the direction of the winding frame axis, and thereafter The windings are wound around the cylindrical roller part of the coil fastening element, so that the windings are brought into a cylindrical shape. Accordingly, a gap formed between the cylindrical roller part and the cylindrical coil can be made small in relation to a case where the cylindrical coil previously set in a cylindrical shape is inserted into the cylindrical roller part. Further, the spool is formed by copying a cylindrical shape of the cylindrical roller member, and therefore, a cylindrical shape of the spool can be formed with high accuracy, whereby a gap formed between the outer peripheral surface of the cylindrical roller member and the yoke can be made small. Accordingly, a gap formed between a permanent magnet and the yoke can be downsized, thus increasing the energy efficiency of the dynamoelectric machine. The machining of the solenoid, which requires considerable time and effort, resulting in poor operability, can therefore be partially avoided.
    Further, the dynamoelectric machine according to the present invention is characterized in that a thickness of an end portion of the coil fixing member on a cylinder axis in the radial direction is larger than a thickness of the cylindrical roller part in the radial direction ft. is more than 9 ft. ft.
    [0019]
    Further, the dynamoelectric machine according to the present invention is characterized in that the coil fixing member includes a large outer diameter portion having an outer diameter larger than an outer diameter of the cylindrical roller member at an end portion of the cylindrical roller member on a cylinder axis.
    [0020]
    Due to this structure of the present invention, even if a wall thickness of the cylindrical roller member is small, the amount of deformation of the cylindrical roller member can be reduced at a stress deforming the cylindrical roller member, and therefore the deformation can be suppressed. Further, since the deformation of the cylindrical roller member is suppressed, the gap formed between the peripheral outer surface of the permanent magnet and the inner peripheral surface of the cylindrical roller member and the gap formed between the outer peripheral surface of the cylindrical roller member and the inner peripheral surface of the yoke can be formed is to be downsized. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the dynamoelectric machine according to the present invention is characterized in that a length of the yoke in the radial direction is set larger than a length of the cylindrical roller part in the radial direction.
    Further, the dynamoelectric machine according to the present invention is characterized in that the cylindrical roller part is disposed on a peripheral inside of the cylindrical coil and the yoke is disposed on a peripheral outside of the cylindrical coil so that the cylindrical coil is fitted between the cylindrical roller part and the yoke.
    Due to this structure of the present invention, the degree of deformation of the yoke having a large radial length can be reduced at a stress that deforms the cylindrical roller part. Accordingly, even if a wall thickness of the cylindrical roller part is small, the deformation of the cylindrical roller part can be suppressed. Further, since the deformation of the cylindrical roller member can be suppressed, the gap formed between the peripheral outer surface of the permanent magnet and the inner peripheral surface of the cylindrical roller member and the gap formed between the peripheral outer surface of the cylindrical roller member of the coil mounting member and the peripheral inner surface of the yoke is made smaller. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the dynamoelectric machine according to the present invention is characterized in that the coil fixing member is formed by using a resin.
    Further, the dynamoelectric machine according to the present invention is characterized in that the coil fixing member is formed by using a resin having a flexural elastic modulus of 5000 MPa or more.
    Due to this structure of the present invention, the coil fixing member is molded using a resin, and therefore, it is possible to make a magnetic flux of a permanent magnet couple to a coil without being interrupted by the coil fixing member. Further, when the bending elastic modulus of the coil fastening device is 5000 MPa or more, the deformation at the time of use is prevented, so that the insertion of the coil fastening element can be performed with high accuracy. Accordingly, the gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the coil fastening member and the gap formed between the outer peripheral surface of the coil fastening member and the inner peripheral surface of the yoke can be reduced. Further, a thickness of the coil fixing member can be reduced by cutting. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the dynamoelectric machine according to the present invention is characterized in that the outer member is formed by using a resin.
    Further, the dynamoelectric machine according to the present invention is characterized in that the outer member is formed by using a resin having a flexural elastic modulus of 5000 MPa or more.
    Due to this structure of the present invention, the outer member is formed by using a resin, and therefore leakage can be prevented. Further, when the bending modulus of the outer member is 5000 MPa or more, the deformation at the time of use is prevented, so that the utilization of the coil fixing member can be performed with high accuracy. Accordingly, a gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the coil fastening member and also the gap formed between the outer peripheral surface of the coil fastening member and the inner peripheral surface of the yoke can be reduced. Further, a thickness of the outer member can be reduced by cutting. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the dynamoelectric machine according to the present invention is characterized in that the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine includes a bearing disposed on the shaft at a position different from a position where the permanent magnet is located is disposed, and an outer peripheral surface of the bearing is brought into contact with an inner peripheral surface of a bearing holding member which is spaced from the coil fixing member.
    Due to this structure of the present invention, there is no possibility that a magnetic flux from the permanent magnet coupling the solenoid coil is scattered around the bearing, and therefore it is possible to prevent the magnetic flux from flowing.
    To reduce the magnetic flux to prevent, which couples the solenoid, thereby improving the energy efficiency of the dynamoelectric machine.
    [0021]
    Further, the dynamoelectric machine according to the present invention is characterized in that the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine includes a bearing disposed on the shaft at a position different from a position where the permanent magnet is located is arranged, and an outer peripheral surface of the bearing in contact with an inner peripheral surface of the
    Coil fixing element or an inner peripheral surface of the bearing support member is placed, which is arranged on an inner peripheral surface of the coil fastening element.
    [0022]
    Due to this structure of the present invention, the permanent magnet and the
    Coil fastener to be arranged concentrically with high accuracy. Accordingly, a gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the coil fixing member can be downsized. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0023]
    Further, the dynamoelectric machine according to the present invention is characterized in that the permanent magnet is mounted on a rotatable shaft - 17, the dynamoelectric machine comprises two bearings arranged on the shaft at positions different from a position at which the A permanent magnet is disposed, and an outer peripheral surface of a bearing is brought into contact with an inner peripheral surface of the coil fastener or an inner peripheral surface of the bearing support member which is mounted on an inner peripheral surface of the coil fastener, and an outer peripheral surface of the other bearing in contact with an inner peripheral surface a bearing holding member is arranged, which is arranged at a distance from the coil fastening element.
    [0024]
    Due to this structure of the present invention, when using a bearing, the permanent magnet and the coil fixing member can be concentrically arranged with high accuracy, and therefore it is possible to maintain a small gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the coil fixing member. By disposing the other bearing at the position spaced from the coil fixing member, it is possible to prevent a magnetic flux of the permanent magnet from scattering around the bearing, thus improving the energy efficiency of the dynamoelectric machine.
    [0025]
    Further, the dynamoelectric machine according to the present invention is characterized in that the bearings are arranged at the end portions of the shaft.
    [0026]
    By virtue of this structure of the present invention, vibrations generated in the dynamoelectric machine can be reduced, and a load is distributed across the bearings, so that the life of the bearings is increased.
    Further, the dynamoelectric machine of the present invention is applicable to a dental or medical treatment handpiece characterized by including: a turbine blade disposed on the shaft at a position different from the positions where the permanent magnet is located and the bearings are arranged; a light emitting part electrically connected to the cylindrical coil; and an air supply pipe that supplies a fluid for rotating the turbine blade.
    The handpiece for dental or medical treatment according to the present invention comprises the above-mentioned dynamoelectric machine, and therefore the energy efficiency is high, whereby the light intensity of a light emitting part of the handpiece can be increased. Furthermore, the handpiece can be made per se at low cost.
    ADVANTAGEOUS EFFECTS OF THE INVENTION
    [0027]
    According to the dynamoelectric machine of the present invention, the volume of the hermetically sealed space of the coil can be made small, and thus the deformation of the breakage of the
    Coil fixing element due to the expansion of air can be prevented. Further, since the deformation of the coil fixing member can be prevented, a thickness of the cylindrical roller member of the - 19 - * ·
    Coil fastener can be reduced. Accordingly, a gap formed between the permanent magnet and the yoke can be downsized, thus increasing the energy efficiency of the dynamoelectric machine.
    BRIEF EXPLANATION OF THE DRAWINGS
    [0028]
    Figure 1 is a schematic cross-sectional view of a dynamoelectric machine according to the present invention in a state in which the dynamoelectric machine is integrated into a handpiece for dental treatment.
    Figure 2 is a cross-sectional view of the dynamoelectric machine according to the present invention.
    Fig. 3 is a view showing a method of winding a solenoid.
    Fig. 4 is a view showing a state of turns shown by winding hexagonal turns coils on a winding frame.
    Fig. 5 is a view of a flat-shaped bobbin made by converting the hexagonal winding coils into a flat shape by pressing.
    Fig. 6 is a view showing a state in which the flat-shaped coil formed of hexagonal winding coils is rolled around a tension rod.
    Figure 7 is a view of a cylindrical cylinder
    Apparatus used for forming the hexagonal winding coils into a cylinder and a rolled coil.
    Figure 8 is a cross-sectional view of a dynamoelectric machine according to the present invention.
    Fig. 9 is a view in which air coils are arranged in the circumferential direction.
    FORM OF EMBODYING THE INVENTION
    [0029]
    Hereinafter, an embodiment of a dynamoelectric machine and a handpiece for dental treatment according to an embodiment of the present invention will be explained in conjunction with FIG. 1 and FIG.
    As shown in Figure 1, a handpiece 1 for dental treatment consists of a tool insert turbine 21 rotatably driving a treatment tool 22 about an axis L, a head part 2 rotatably holding the tool insert turbine 21, and a grip part 3 gripped by the user.
    An air supply pipe 51 and a water supply pipe 52 extend forward from a rear end portion of the grip part 3. A dynamoelectric machine 40 is disposed inside the rear portion of a housing 38. In this embodiment, the dynamo-electric machine 40 is also used as a power generator. Although the dynamoelectric machine is explained in a mode in which the dynamoelectric machine is provided for the handpiece for dental treatment, in this
    Embodiment does not limit the dynamoelectric machine to such a mode, it can also be used in other modes.
    A shaft 46 rotatably supported by the bearings 47, 48 is provided at the center of the cylinder axis of the dynamo-electric machine 40. The bearing 48 is held by a bearing holding member 54 disposed in a front portion of the housing 39 side. The bearing 47 is held by a bearing holding member 53 fitted in a coil fixing member 41. It is positive that the bearing 48 and the bearing 47 are not affected by the magnetic flux of a permanent magnet. In this case, the bearing 48 and the bearing 47 may preferably be formed of an oil-less bearing mainly made of, for example, copper or the like. Further, a permanent magnet 45 is disposed on an outer peripheral surface of the shaft 46. Further, the coil fixing member 41 is disposed with an air gap formed between the permanent magnet 45 and the coil fixing member 41. A solenoid 44 is provided on an outer peripheral surface of the coil fixing member 41. A yoke 43 is disposed at a position where the yoke 43 faces an outer periphery of the cylindrical coil 44. A blade 37 of a power generation turbine is mounted on the front portion of the shaft 4 6. In FIG. 1, the power generation turbine blade 37 and the permanent magnet 45 are arranged between the bearings 47, 48. However, the power generation turbine blade 37 is not always disposed between the bearings 47,48. In this case, it is sufficient that the power generation turbine blade 37 is disposed on the shaft 46 at a position which is - 22 - 22 * ··· Μ • * • · Ι ·
    It is different from positions at which the permanent magnet 45 and the bearings 47, 48 are arranged. For example, the power turbine blade 37 may be disposed on the shaft 46 at a position outboard of the bearing 48.
    With respect to an air flow supplied through the air supply pipe 51, air is throttled by an introduction nozzle provided in a front portion of the housing 39, and is introduced into the power generation turbine blade 37 and rotates the shaft 46 is mounted on an outer peripheral surface of the shaft 46 is rotated with the shaft and generates an induction voltage in the solenoid 44. The voltage generated in the solenoid 44 passes through an electrical line 32 via the pins 49 and is connected to an LED 31 is applied, whereby the LED 31 is turned on.
    A fluid, such as air, introduced into the power generation turbine blade 37 is diverted to a front of the turbine, is introduced into the tool bit turbine 21 after passing through an air passage 33, and rotates the treatment tool 22.
    FIG. 2 is a cross-sectional view of the dynamo-electric machine 40 shown in FIG. As shown in FIG. 2, the dynamo-electric machine 40 includes the shaft 46 on the cylinder axis. The permanent magnet 45 is rotatably mounted on the outer peripheral surface of the shaft 46. The bearing 47 and the bearing 48 are disposed on the shaft 46 at positions different from the position where the permanent magnet 45 is disposed. In the case of this embodiment, the bearing 47 - 23 - - 23 - * i ** »► * * ·· * ···· ft. • · ·« »ί:; · ···; ; And the bearing 48 are disposed on the shaft 46 on end portion sides opposite to the permanent magnet 45. *** "
    An outer peripheral surface of the bearing 47 is brought into contact with an inner peripheral surface of the bearing holding member 53, which is disposed on an inner peripheral side of the coil fixing member 41. In this case, since the outer peripheral surface of the bearing 47 is brought into contact with the inner peripheral surface of the bearing holding member 53 disposed on the inner peripheral side of the coil fixing member 41, the permanent magnet 4 and the coil fixing member 41 can be concentrically arranged with high accuracy, thereby A gap formed between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface of the coil fixing member 41 can be reduced. Accordingly, a gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamo-electric machine 40. It is not always necessary to bring the bearing 47 into contact with the inner peripheral surface of the bearing holding member 53, and it is sufficient that the bearing 47 is brought into direct contact with the inner peripheral surface of the coil fixing member 41.
    An outer peripheral surface of the bearing 48 is brought into contact with an inner peripheral surface of the bearing holding member 54 spaced from the coil fixing member 41. That is, the bearing 48 is disposed outside the inner peripheral surface of the coil fixing member 41. In this case, the bearing 48 on the shaft 46 with
    Disposed from the permanent magnet 45, and therefore there is no possibility that a magnetic flux from the permanent magnet 45, which couples the solenoid coil 44, scatters around the bearing. Accordingly, an induction voltage is not reduced due to the reduction of a magnetic flux coupling the solenoid 44, and therefore, the energy efficiency of the dynamoelectric machine 40 can be improved.
    [0030]
    Further, the bearings 47, 48 on the axial
    End portions of the shaft 46 is arranged. Due to such a structure, vibrations generated in the dynamo-electric machine 40 can be reduced, and stress is distributed to the bearing 48 and the bearing 47, so that the life of the bearing 48 and bearing 47 can be extended.
    [0031]
    The arrangement of the bearings 47, 48 is not always limited to the above case. For example, the outer peripheral surfaces of bearings 47 and bearings 48 may be brought into contact with either the inner peripheral surface of the coil mounting member 41 or the inner peripheral surface of the bearing support member 53 disposed on an inner peripheral side of the coil mounting member 41. In this case, it is not always necessary to arrange the power generation turbine blade 37 between the bearing 47 and the bearing 48. Further, the outer peripheral surfaces of bearings 47 and bearings 48 may be brought into contact with the inner peripheral surface of the bearing support member 54 spaced from the coil mounting member 41. Further, the bearings 47, 48 may not be disposed on the axial end portions of shaft 46. Also in
    Surface of these cases, the whole cylindrical coil 44 on an outer peripheral surface of a cylindrical roller part 42 of the
    Coil fixing member 41 attached, and therefore, the contact between the cylindrical coil 44 and the permanent magnet 45 can be prevented, and the deformation of the cylindrical coil 44 can be prevented, whereby the gap between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface of the
    Coil fixing member 41 is formed, and also the gap formed between the outer peripheral surface of the coil fixing member 41 and the inner peripheral surface of the yoke 43 can be reduced. Accordingly, even in these cases, the gap between the
    Permanent magnets 45 and the yoke 4 3 is formed to be reduced, thus increasing the energy efficiency of the dynamoelectric machine. Further, the shaft 46 may be rotated by a method different from a method using the power generation turbine blade 37.
    The permanent magnet 45 is formed of an Sm / Co sintered anisotropic magnet and is magnetized by two poles. Further, the permanent magnet 45 may be formed of a Nd-Fe-B magnet. Further, the permanent magnet 45 may be formed of a bonded magnet instead of a sintered magnet. Further, the permanent magnet 45 may be formed of an isotropic magnet. Furthermore, the permanent magnet 45 may consist of several, that is, two or more poles.
    The bungee fixing member 41 is disposed on the outer periphery of the permanent magnet 45 with an air gap formed therebetween. The
    The coil fixing member 41 has the cylindrical roller part 42 at a portion thereof facing the permanent magnet 45, and the cylindrical coil 44 is fixed to the outer peripheral surface of the cylindrical roller part 42. It is preferable to set a thickness of the cylindrical roller member 42 so that the cylindrical roller member 42 can ensure strength and has a small thickness. In this case, the thickness of the cylindrical roller member 42 is preferably, for example, 0.3 mm. The thickness of the cylindrical roller member 42 is not limited to the above value and can be set to 0.1 mm or more and 0.5 mm or less. The coil fixing member 41 is formed by using a resin (PPS or the like). In this case, the coil fixing member is preferably formed by using a resin having a bending modulus of 5000 MPa or more. Terminal pins 49 are fixed to an end portion of the coil fixing member 41. Further, a lead of a field coil is fixed to an end portion of the terminal pin 49.
    The yoke 43 is provided at a position where the yoke faces an outer peripheral side of the solenoid 44. The yoke 43 is provided for magnetically connecting the magnetic poles of the permanent magnet, and is formed by laminating thin magnetic plates, such as electromagnetic steel sheets. The yoke 43 may be formed by using a magnetic material in a single steel block, for example.
    An outer member 50 is provided on an outer peripheral side of the yoke 43. The yoke 43 and the outer member 50 may, for example, with a
    Adhesive or the like are fastened together.
    [0032]
    The outer member 50 has a cylindrical shape opening at both ends thereof. The coil fixing member 41 is connected to both end portions of the outer member 50. The outer member 50 may be formed using a resin (PPS or the like). In this case, the outer member 50 is formed by using a resin having a bending modulus of 5000 MPa or more. Accordingly, spreading can be prevented. The outer member 50 may be formed with, for example, a magnetic material or metal.
    The yoke 43 may also function as the outer member 50. In this case, the yoke 43 forms an outside of the dynamo-electric machine 40, and therefore, a portion of the outer member 50 shown in FIG. 2 is also formed of the yoke 43. In this case, the yoke 4 3 is formed by laminating thin magnetic plates, such as electromagnetic steel sheets. Further, the yoke 43 may be formed using, for example, a magnetic material in a single steel block. Also, in a case where the yoke 43 constitutes the outside, such as the dynamoelectric machine 40 shown in FIG. 2, a hermetically sealed space formed by the coil fixing member 41 and the solenoid 44 are thus formed is arranged in the hermetically sealed room.
    A hole, which is not shown in the drawing, is formed in the coil fixing member 41, so that it is possible to use a resin such as a
    Epoxy adhesive to fill through the hole in the interior of the coil fixing member 41 which is surrounded by the coil fixing member 41 and the outer member 50.
    [0033]
    Here, the method of forming the solenoid 44 will be explained. Aligned turns are wound around the winding frame having a hexagonal shape, and thereafter, in a state where the turns are wound around the winding frame, the turns are temporarily fixed with a band preventing the turns from collapsing. In such a state, the windings are removed from the winding frame, which has a hexagonal shape, and thereafter the windings removed from the winding frame are brought into a planar plate shape by causing a pair of opposing surfaces, which are a hexagonal shape fall down in the direction of the winding frame axis. Then, the turns which have been put into a planar plate shape are wound around the cylindrical roller part 42 and the outer surfaces of the turns are fixed with a band. Further, the windings which have been brought into a planar plate shape may have outer surfaces which, after being wound around the cylindrical roller member 42, are adhered with an adhesive. Further, the cylindrical roller part 42 and a substantially whole inner surface of the cylindrical coil 44 may be fixed to each other with an adhesive. In this case, even if vibration or shock occurs or a temperature changes, there is no possibility that the solenoid coil 44 will be deformed, which increases the reliability of the dynamoelectric machine. Further, since there is no deformation of the cylindrical roller member 44, the gap formed between the peripheral outer surface of the permanent magnet 45 and the peripheral inner surface of the cylindrical coil 44 and also the gap formed between the peripheral outer surface of the cylindrical roller member 42 and the peripheral inner surface of the yoke 43 is made smaller. Accordingly, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. Further, it is possible to omit a hardening operation for heating a self-melting resin of the coils 62.
    [0034]
    The mode of operation of the dynamo-electric machine 40 according to this embodiment having such a construction will be explained hereinafter.
    [0035]
    The solenoid 44 is fixed to the outer surface of the cylindrical roller member 42 and is disposed in the hermetically sealed space formed by the coil fixing member 41 and the outer member 50. a thickness of
    The solenoid 44 can reduce a thickness thereof in the radial direction as compared with an air-core coil, and therefore, a gap formed between an outer diameter of the cylindrical roller 42 and an inner diameter of the yoke 43 can be reduced, thereby providing a volume of the hermetically sealed space the coil can be reduced. Accordingly, the deformation or the breakage of the cylindrical roller member 42 due to the expansion of air can be prevented. Further, since the deformation of the cylindrical roller member 42 can be prevented, it is possible to reduce 42 to cylindrical roller member 42. Accordingly, a thickness of the coil in the radial direction can be reduced, and a thickness of the cylindrical roller part 42 can be reduced, and therefore, a gap formed between the permanent magnet 45 and the yoke 43 can be reduced, which increases the energy efficiency of the dynamoelectric machine ,
    [0036]
    Further, the coil fixing member 41 is formed by using a resin having a bending modulus of 5000 MPa or more, and therefore, the coil fixing member 41 can be formed with high accuracy. Further, a thickness of the cylindrical roller member 42 can be reduced.
    Accordingly, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0037]
    Further, when the area covering the cylindrical coil 44 is filled with the resin, air in a hermetically sealed space can be reduced. Even if air expands due to a high temperature in the sterilizing treatment, the deformation or the breakage of the cylindrical roller member 42 can be prevented. Further, since the deformation of the cylindrical waist part 42 can be prevented, it is possible to reduce a thickness of the cylindrical roller part 42. Accordingly, a gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0038]
    Further, in this case, the cylindrical coil 44 has a small and uniform coil thickness, and therefore, the filled resin also has a small and uniform thickness in the radial direction. Even if a gap is formed in the hermetically sealed space and high-pressure high-pressure steam penetrates into a resin portion covering the solenoid 44, so that the resin swells, deformation and breakage of the cylindrical roller member 42 can be prevented accordingly. Further, the deformation of the cylindrical roller member 42 can be suppressed even if the thickness of the cylindrical roller member 42 is reduced, and therefore, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, which increases the energy efficiency of the dynamoelectric machine ,
    Further, with respect to the coil fixing member 41, a thickness of an axial end portion in the radial direction is set larger than a thickness of the cylindrical roller portion 42 in the radial direction. With respect to the coil fixing member 41, the axial end portion is formed of a large-diameter portion having an outer diameter larger than an outer diameter of the cylindrical roller member 42. Although the axial end portion of the coil fixing member 41 is formed of the large outer diameter portion, the axial end portion of the coil fixing member 41 is not limited to such a shape as long as the thickness of the axial end portion in the radial direction is greater than the thickness of the cylindrical roller member 42 in the radial direction. For example, the axial end portion of the coil fixing member 41 may be formed of a small outer diameter portion having an outer diameter smaller than an outer diameter of the cylindrical roller member 42, with a large inner diameter portion having an inner diameter larger than one Inner diameter of the cylindrical roller member 42 is, or from a small inner diameter portion having an inner diameter which is smaller than an inner diameter of the cylindrical roller member 42. That is, since the thickness of the axial end portion of the coil fixing member 41 in the radial direction is greater than the thickness of the cylindrical roller member 42 in the radial direction, the rigidity of the cylindrical roller member 42 increases, so that the deformation of the cylindrical roller member 42 by the axial
    End portion of the coil fixing member 41 can be suppressed, whereby the thickness of the cylindrical roller member 42 can be reduced. Further, since the deformation of the cylindrical roller member 42 can be suppressed, the gap formed between the peripheral outer surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42 and the gap formed between the peripheral outer surface of the cylindrical roller member 42 and the cylindrical outer surface peripheral inner surface of the yoke 43 is formed to be reduced. Accordingly, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. Although the thickness of the one axial end portion of the coil fixing member 41 is set larger than the thickness of the cylindrical roller member 42 in the radial direction, this embodiment is not limited to such a case. That is, the thickness of the other axial end portion of the coil fixing member 41 may be larger than the thickness of the other axial end portion.
    Thickness of the cylindrical roller member 42 can be adjusted in the radial direction. Further, the thickness of both axial end portions of the coil fixing member 41 can be set larger than the thickness of the cylindrical roller member 42 in the radial direction.
    [0039]
    Further, the cylindrical roller member 42 may be disposed on an inner peripheral side of the cylindrical coil 44, and the yoke 43 may be disposed on an outer peripheral side
    Periphery side of the solenoid 44 can be arranged. In this case, a length of the yoke 43 in the radial direction is set larger than a length of the cylindrical roller member 42 in the radial direction. Further, the yoke 43, which has a length in the radial direction that is longer than a length in the radial direction of the cylindrical roller part 42, can reduce a magnitude of deformation at a bending stress that deforms, for example, the cylindrical roller part 42. Accordingly, the deformation can be suppressed even if a wall thickness of the cylindrical
    Roller part 42 is low. Further, since the deformation of the cylindrical roller member 42 is suppressed, the gap formed between the peripheral outer surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42 and the gap formed between the peripheral outer surface of the cylindrical roller member 42 and the peripheral outer surface Inner surface of the yoke 43 is formed to be reduced by an amount corresponding to the suppression of the deformation. Accordingly, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. - 34 - • · ♦ [0040]
    In the formation of the cylindrical coil 44, the coils 62, which are formed into a planar plate shape, are wound around the cylindrical roller member 42 and are fixed to the cylindrical roller member 42 with a belt. As compared with a case where the coil is previously formed into a cylindrical shape and the cylindrical coil is inserted into the cylindrical roller part, a gap formed between the cylindrical roller part 42 and the cylindrical coil 44 can be reduced by an amount. which corresponds to a gap for such an introduction.
    Further, the cylindrical coil 44 is brought into a cylindrical shape of the cylindrical roller member 42, and therefore, a cylindrical shape of the cylindrical coil 44 can be formed with high accuracy, whereby a gap between the outer peripheral surface of the cylindrical roller member 42 and the inner peripheral surface of the yoke 43rd is formed, can be scaled down. Accordingly, as compared with a case where the coil is made into a cylindrical shape in advance and the cylindrical coil is inserted into the cylindrical roller part, a gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thereby improving energy efficiency the dynamoelectric machine is increased. Therefore, a cylinder coil hardening operation requiring a considerable time and efforts, resulting in poor operability, can be avoided.
    [0041]
    Further, the cylindrical coil 44 includes linear conductor portions extending along the longitudinal direction of the permanent magnet. If, for example, the
    Cylindrical coil 44 is brought into hexagonal turns, portions of the windings are aligned on the cylinder axis to the linear line sections of the hexagonal turns. Accordingly, the linear pipe portions in the cylindrical axis direction that couple a magnetic flux are present in the middle portion of the cylindrical windings, and therefore, an induced electromotive force can be effectively generated, whereby electric power can be efficiently generated while simultaneously miniaturizing the entire dynamoelectric machine is realized.
    Another embodiment of the present invention will be explained in conjunction with FIG.
    Fig. 8 is a view showing another embodiment of the dynamoelectric machine. The dynamo-electric machine 40 is composed of a solenoid 44 electrically connected to the outside via a terminal 4 9 and generates an induced electromotive force, a rotor 20 which generates an induced electromotive force by rotation, a yoke 73 in which it corresponding elements are housed, and the like. In this embodiment, the yoke is configured to also function as an outer member. In this embodiment, the dynamoelectric machine may also include the yoke and the outer member as shown in FIG.
    The rotor 20 is composed of a cylindrical permanent magnet 45 and a shaft 46 and is rotatably supported between two points of the bearings 47, 48 which are arranged in middle positions of the bearing holding members 77, 78. Further, the shaft 46 penetrates the permanent magnets 45 along the longitudinal direction and is fixed to a central portion of the permanent magnet 45.
    [0042]
    The yoke 73 has a cylindrical shape with both ends thereof opened. The yoke 73 is for magnetically connecting the magnetic poles of
    Permanent magnets provided with each other and is formed by laminating thin magnetic sheets, such as flat rolled steel magnetic sheets. The yoke 73 may be formed using a magnetic material in a single steel block, for example. Due to such a structure, the yoke 73 can also function as an outer member.
    A coil fixing member 41 is connected to one end side of the yoke 73. The
    Coil fastener. 41 includes a cylindrical roller part 42 that faces the permanent magnet 45. The solenoid 44 is fixed to an outer peripheral surface of the cylindrical roller member 42. The coil fixing member 41 is formed by using a resin (polyphenylene sulfide or the like). The coil fixing member 41 can be formed by using a resin having a bending modulus of 5000 MPa or more. When the coil fixing member 41 is formed with a resin, it is possible to obtain an advantageous effect that no eddy current is formed, so that a loss can be reduced. The coil fastener may be formed using a non-magnetic metal, such as
    Example aluminum or brass.
    The other end side of the yoke 73 and an end portion of the coil fixing member 41 have a circular ring opening, and a lid 71 on which the terminal pins 49 are mounted is fitted in the circular ring opening so as to close the circular ring opening. A hole not shown in the drawing is formed in the lid 71, and the inside surrounded by the coil fixing member 41, the yoke 73 and the lid 71 is filled through the hole with an epoxy adhesive. The lid 71 may be formed together with the coil fixing member 41. In this case, a hole, not shown in the drawing, is formed in the coil fixing member 41, and the inside surrounded by the coil fixing member 41 and the yoke 73 can be filled through the hole with an epoxy adhesive.
    Further, with respect to the coil fixing member 41, a thickness of an axial end portion in the radial direction is set larger than a thickness of the cylindrical roller portion 42 in the radial direction. With respect to the coil fixing member 41, both axial end portions are formed of a large outer diameter portion having an outer diameter larger than an outer diameter of the cylindrical roller portion 42 and a small outer diameter portion having an outer diameter smaller than the outer diameter of the cylindrical roller part 42 is. Although the axial end portions of the coil fixing member 41 are formed of the large outer diameter portion and the small outer diameter portion, the axial end portions of the coil fixing member 41 are not limited to such a shape as long as the thicknesses of the axial end portions in the radial direction are greater than the thickness of the cylindrical Roller part 42 in the radial direction. For example, the axial end portion of the coil fixing member 41 may be formed of a large-inner-diameter portion having an inner diameter larger than an inner diameter of the cylindrical roller member 42 or a small-sized portion
    Inner diameter having an inner diameter which is smaller than an inner diameter of the cylindrical roller part 42. That is, since the thicknesses of the axial end portions of the
    Coil fixing member 41 in the radial direction are larger than the thickness of the cylindrical roller member 42 in the radial direction, the rigidity of the cylindrical roller member 42 increases, so that the deformation of the cylindrical roller member 42 by the axial
    End portions of the coil fixing member 41 can be suppressed, whereby the thickness of the cylindrical roller member 42 can be reduced. Further, since the deformation of the cylindrical roller member 42 can be suppressed, the gap formed between the peripheral outer surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42 and the gap formed between the peripheral outer surface of the cylindrical roller member 42 and the cylindrical outer surface peripheral inner surface of the yoke 73 is made smaller. Accordingly, the gap formed between the permanent magnet 45 and the yoke 73 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0043]
    A bearing support member 78 is provided with an end face of the inner peripheral surface of
    Coil fixing member 41 is connected, and a bearing holding member 77 is connected to the other end side of the inner peripheral surface of the
    Coil fixing element 41 is connected, and the
    Bearing support members 78, 77 are connected to the bearings 47 and _ * 39 "- 48, respectively.
    [0044]
    Due to such a structure, the permanent magnet 45 and the coil fixing member 41 can be concentrically arranged with high accuracy, and therefore, a gap formed between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42 can be reduced. Accordingly, a gap formed between the permanent magnet 45 and the yoke 73 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. The arrangement of the bearings 47, 48 is not limited to the above case. That is, the bearings 47, 48 may be substantially at the same
    Positions may be arranged as in the embodiment shown in FIG.
    The present invention is not limited to the above embodiments, and various modifications are conceivable without departing from the gist of the present invention.
    [0045]
    Further, in the embodiment, it is needless to say that the winding frame is not limited to the hexagonal winding frame and all the polygonal winding frames may be used.
    In this embodiment of the dynamoelectric machine, the explanation has been made with respect to the generator. However, the dynamo-electric machine may also be used as a motor that rotates a permanent magnet by, for example, applying an AC voltage to the three-phase coils with sequential switching.
    EXPLANATION OF THE SYMBOLS
    1: handpiece for dental treatment 2: head part 3: grip part 20: rotor
    21: tool insert turbine 22: treatment tool 31: LED 32: electric wire 33: air passage 37: turbine blade 38: rear portion of the casing 39: front portion of the casing 40: dynamoelectric machine 41: coil fixing member 42: cylindrical roller member 43, 73: yoke 44: cylindrical coil 45: Permanent magnet 46: Shaft 47, 48: Bearing 50: Outer member 51: Air supply pipe 52: Water supply pipe 53, 54: Bearing support 56: Air supply pipe 57: Water supply pipe 61: Winding frame 62: Winding 63: Belt 64: Winding rod 65: Rolled cylindrical bobbin 66: Cylinder forming device 71: Lids 77, 78: Bearing holding member 101: Air bobbin 102: Coil part 103: Air core part
    权利要求:
    Claims (13)
    [1]
    1. A dynamo-electric machine comprising: a permanent magnet which circumferentially arranges a plurality of magnetic poles on an outer periphery thereof; a coil fixing member having a cylindrical roller part at a position where the cylindrical roller part faces the permanent magnet with an air gap formed therebetween; a cylindrical coil formed by dropping a planar plate-shaped coil formed from a coil wound in the predetermined direction in the predetermined direction, and fixing the planar plate-shaped coil to an outer peripheral part of the cylindrical roller part such that the planar plate-shaped coil is brought into a circular-annular shape; and a yoke made of a magnetic material disposed at a position where the yoke faces an outer peripheral portion of the cylindrical coil, the cylindrical coil being disposed in a hermetically sealed space formed by the coil fixing member.
    [2]
    2. The dynamoelectric machine according to claim 1, further comprising an outer member provided on an outer peripheral side of the yoke, wherein the hermetically sealed space is formed by the coil fixing member and the outer member. The dynamoelectric machine according to claim 1, wherein the hermetically sealed space is filled with a resin at least in a region where the hermetically sealed space covers the solenoid. A dynamoelectric machine according to claim 1, wherein the cylindrical coil is formed into a cylindrical shape such that turns wound around a polygonal winding frame are brought into a planar plate shape by causing the turns to fall in the direction of the winding frame axis, and thereafter the windings are wound around the outer peripheral part of the cylindrical roller part of the coil fixing member, and the cylindrical coil comprises linear lead parts extending along the longitudinal direction of the permanent magnet. The dynamoelectric machine according to claim 1, wherein a thickness of an end portion of the coil fixing member on a cylinder axis in the radial direction is set larger than a thickness of the cylindrical roller part in the radial direction. A dynamoelectric machine according to claim 5, wherein the coil fixing member comprises a large outer diameter portion having an outer diameter larger than an outer diameter of the cylindrical roller member at 4 * ········································. * * * * * * ·



    an end portion of the cylindrical roller part is on a cylinder axis.
    [3]
    7. A dynamoelectric machine according to claim 1, wherein a length of the yoke in the radial direction is set larger than a length of the cylindrical roller member in the radial direction.
    [4]
    8. A dynamoelectric machine according to claim 7, wherein the cylindrical roller part is disposed on a peripheral inside of the cylindrical coil and the yoke is disposed on a peripheral outside of the cylindrical coil so that the cylindrical coil is fitted between the cylindrical roller part and the yoke.
    [5]
    A dynamoelectric machine according to claim 1, wherein said coil fixing member is formed by using a resin.
    [6]
    10. The dynamoelectric machine according to claim 9, wherein the coil fixing member is formed by using a resin having a flexural elastic modulus of 5000 MPa or more.
    [7]
    A dynamoelectric machine according to claim 2, wherein said outer member is formed by using a resin.
    [8]
    The dynamoelectric machine according to claim 11, wherein the outer member is formed by using a resin having a flexural elastic modulus of 5000 MPa or more.
    [9]
    13. The dynamoelectric machine according to claim 1, wherein the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine comprises a bearing disposed on the shaft at a position different from a position to which the permanent magnet is disposed, and an outer peripheral surface of the bearing is brought into contact with an inner peripheral surface of the bearing holding member spaced from the coil fixing member.
    [10]
    14. The dynamoelectric machine according to claim 1, wherein the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine includes a bearing disposed on the shaft at a position different from a position where the permanent magnet is disposed, and an outer peripheral surface of the bearing is brought into contact with an inner peripheral surface of the coil fixing member or an inner peripheral surface of the bearing holding member, which is disposed on a peripheral inside of the coil fixing member.
    [11]
    15. The dynamoelectric machine of claim 1, wherein the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine comprises two bearings arranged on the shaft at positions. Which differ from a position at which the permanent magnet is disposed, and an outer peripheral surface of a bearing in contact with a and an outer peripheral surface of the other bearing is brought into contact with an inner peripheral surface of the bearing holding member, which is spaced from the coil fixing member.
    [12]
    16. A dynamoelectric machine according to claim 13, wherein the bearings are arranged at end portions of the shaft.
    [13]
    17. Handpiece for dental or medical treatment, comprising: the dynamoelectric machine according to claim 13 to 16; a turbine blade disposed on the shaft at a position different from the positions at which the permanent magnet and the bearings are arranged; a light emitting part electrically connected to the cylindrical coil; and an air supply pipe that supplies a fluid for rotating the turbine blade.
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    同族专利:
    公开号 | 公开日
    JP2011101577A|2011-05-19|
    JP5615614B2|2014-10-29|
    AT511025B1|2017-12-15|
    JP2011101580A|2011-05-19|
    JP5615613B2|2014-10-29|
    AT511025A3|2015-01-15|
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    法律状态:
    2021-05-15| MM01| Lapse because of not paying annual fees|Effective date: 20200901 |
    优先权:
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    JP2009232774|2009-10-06|
    JP2010165929A|JP5615613B2|2009-10-06|2010-07-23|Rotating electric machine and dental or medical handpiece|
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    PCT/JP2010/064929|WO2011043143A1|2009-10-06|2010-09-01|Rotating electric machine, and dental or medical handpiece|
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