• 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:
    Gears and racks that are not interfering with each other at the time of engagement between the rack and the gears, but also secure the engaging strength of the rack and the gears at a regular position, and also facilitate the machining and assembly of parts. A structure and an operation assistance device having the structure are provided. As a means to solve this problem, the gear 36 is rotated by the driving force of the driving source, and the gear 36 is arranged to be detachably coupled, and the rack linearly moves in a predetermined direction by rotation when the gear 36 is engaged. In the engagement structure with (51), when the tooth (36) and the rack (51) are engaged, the first tooth is the first in the direction of rotation of the tooth (36) when the first tooth is the first tooth (36a1) (51a1), respectively. The teeth 36a1 of the rack can pass through the position axially overlapping with the rack teeth 51a of the second and subsequent racks, and after passing through the first rack teeth 51a1 of the rack 51 36) and the engagement of the rack 51 is to start.
    公开号:KR20010020827A
    申请号:KR1020000024867
    申请日:2000-05-10
    公开日:2001-03-15
    发明作者:테라다요시아키；야마다히로시；와다류헤이；마츠시마순지
    申请人:고구치 유죠；가부시기가이샤 산교세이기 세이사꾸쇼；
    IPC主号:
    专利说明:

    Motion Assist Device {OPERATION ASSISTING DEVICE}
    The present invention relates to a motion assist device for assisting the opening operation of a swinging door or a drawer front surface installed in a refrigerator and the like with a gear and a rack that are freely coupled and separated.
    In home appliances and furniture with swinging doors and drawers, the front of the door or drawer is fixed to the main body side by magnetic action such as magnet. Such a door or drawer (hereinafter referred to as opening / closing member) is attracted to the body body side by the magnetic attraction force of the magnet at the moment of closing, so that it can be reliably closed with a small force, and the closed state is maintained by a constant closing force in the closed state.
    Therefore, even if there is some vibration, it can solve the problem of opening the door or drawer by itself, and it is applied to many products.
    The opening / closing member closed by such a constant closing force is usually not so difficult to open, but for example, if the object is held in both hands so as to open the opening and closing member with a slight force, it will not be opened simply. Moreover, it is not said that operability is good for the elderly who are weak in arm or grip.
    This type of opening / closing member needs to satisfy both the element to securely close and the element capable of easy opening, but it must have a certain closing force in view of maintaining a certain closed state. . Therefore, it is required to make the opening / closing mechanism open easily, maintaining the closing force more than a certain level.
    Therefore, the present applicant has developed a motor actuator disclosed in Japanese Patent Laid-Open No. 4-17548 as an apparatus for making the operation even a little easier (see Fig. 6). The motor actuator includes a motor 101, a deceleration mechanism 102 for decelerating and transmitting a driving force of the motor 101, and a rack 104 meshing with the pinion 103 at the final stage of the deceleration mechanism 102. It has a rod 105 which has, the position detection means 106 for detecting the position of the rod 105, and the case 107 which accommodates these members.
    The motor actuator is energized when the user touches the switch mechanism provided in the door (not shown), and slides the rod 105 forward by the driving force of the motor 101. The rod 105 It is designed to assist the opening operation of the door placed in front of the slide using the slide movement of the.
    However, in the motor actuator shown in FIG. 6, if the rod remains in the front after assisting the opening operation of the door, the rod is pushed back into the case when the user closes the door. Therefore, the deceleration lubrication heat is forcibly rotated by the slide movement in the return direction of the rod, and there is a concern that the gears of the deceleration lubrication heat are broken.
    Therefore, in such a device, it is conceivable to include a slip mechanism in the deceleration lubrication heat, or to include a clutch mechanism in which the driving force is transmitted only in one direction (the direction in which the rod is advanced). When these are assembled, even if the rod remaining in the front is pushed back into the case, the gears are idled in the assembled slip mechanism, and the force pushed down weakens the internal mechanisms such as deceleration lubrication heat and motor.
    However, even if a slip mechanism or a clutch mechanism is provided to cope with the gear damage problem when the slide moves in the return direction, there is a risk that the door and the rod collide with each time the door is closed, thereby damaging the rod or the inside of the door.
    In the above-described motor actuator, in order to cope with such a problem, the motor is rotated in reverse to return the rod to its original position. That is, when the rod 105 slides forward to a predetermined position, it is detected by the position detecting means 106. Based on this detection, the motor 101 is stopped by drive control of a control circuit (not shown). Thereafter, the motor 101 is rotated in reverse to slide the rod 105 in the reverse direction to return the rod 105 to its original position.
    However, in order to perform such control, the above-described motor actuator includes a position detecting means 106 for detecting the position of the rod 105 and a motor 101 based on the result of position detecting by the position detecting means 106. ), A driving circuit (not shown) for rotating in both directions is provided. As a result, the number of parts increases and the structure becomes complicated, resulting in an increase in the overall size of the apparatus. These problems are not a big problem when incorporated into high-end products or large equipment, but are a big drawback when incorporated into low-priced products or small products.
    In addition, the above-described motor actuator necessarily requires the driving force of the motor 101 to return the rod 105 to the home position. Therefore, in the case of a power failure in the state where the rod 105 protrudes or a circuit damage occurs in that state, the rod 105 is pushed back into the case 107 manually, but the force transmitted to the rotor of the motor 101 Since it becomes a speed increasing relationship, the load to the motor 101 becomes extremely large and cannot simply return. For example, if pushed back strongly, the gears during gear lubrication heat are broken as described above. In order to avoid this, providing a slip mechanism or a clutch mechanism also results in an increase in the number of parts, a complicated structure, and a large size of the device.
    The object of the present invention is that the protruding member after protruding forward to assist the operation of the opening and closing member by the driving force of the motor is loosened the coupling gear and the connection relationship with the gear lubrication heat is broken, so that the user can easily insert the protruding member inside ( It is an object of the present invention to provide a motor capable of returning to the home position direction).
    In order to achieve the above object, the present invention has a gear wheel heat for transmitting the driving force of the motor, and a protrusion member that slides by the driving force of the motor input through the gear wheel heat and is in direct or indirect contact with the opening and closing member. An operation assisting device which assists the operation of the opening and closing member by the slide operation of the gear, provides a partial gear having a toothed portion engaged with the protruding member and a toothless portion where the protruding member is disengaged from the tooth lubrication heat. By assisting the opening and closing member by sliding the preceding member by engaging the toothed part, by loosening the engagement with the protruding member by the part without teeth, the driving force of the motor is not transmitted to the protruding member The force from the protruding member is prevented from being transmitted from the partial gear to the motor side.
    Therefore, the projecting member after protruding forward to assist the operation of the opening and closing member by the driving force of the motor is loosened the coupling gear and the connection relationship with the gear lubrication heat is broken. Direction).
    In addition to the above-described motion assist device, the toothed portion is formed to have a greater thickness in the axial direction of the tooth than a portion without teeth, and is coupled to both teeth forming the protruding member and the gear lubrication heat of the front end of the partial tooth. The part without teeth forms a smaller thickness in the tooth axial direction than the tooth part so as to be engaged only on one side of the gear forming the gear lubrication heat at the front end of the partial gear.
    When comprised in this way, a tooth part will always engage with the gear of the front end, and will rotate by the rotational force in a motor. In addition, if the toothless portion is formed to have a smaller thickness in the tooth axial direction than the toothed portion so as to be coupled only to the teeth at the front end of the gear lubrication row, after the operation of the opening and closing member, the partial tooth is stopped so that the toothless portion faces the protruding member. When the member is returned to the home position manually, the protruding member and the partial gear do not interfere with each other and can be easily moved.
    According to another aspect of the present invention, in addition to the above-described motion assisting device, when the protruding member starts to contact the opening / closing member, the tooth forming part together with the protruding member of the front teeth of the partial tooth is engaged with the protruding member.
    In this way, when the protruding member starts to contact the opening / closing member, if the tooth is engaged with the protruding member together with the gear forming the gear lubrication heat of the front end of the partial tooth, the position of the tooth is strong when the required torque is maximized. The toothed part can be used. For this reason, the thin part of the tooth of a partial gear does not need to be thickened for intensity | strength increase, and the thickness of the whole partial gear can be made thin, and the whole apparatus can also be made thin.
    The invention further includes a protruding member return means for returning to a position before the protruding member performs slide movement when the protruding member and the partial gear are released in addition to the above-described motion aid. When the protruding member is protruded, the protruding member is easily disturbed when taking out the contents in the main body provided with the opening / closing member or easily becomes a target of children's mischief. This problem can be avoided by the protruding member return means.
    In still another aspect of the present invention, in addition to the operation assistance apparatus described above, a current detecting means for detecting a current value of the motor is provided, and the motor is stopped using the detected current value. In this way, the motor can be stopped by the load of the motor.
    In another invention, in addition to the above-described motion assisting device, a rack is formed on the protruding member to engage the rack with the teeth, and the first teeth as the first teeth when the rack and the teeth engage with each other. Allows the first tooth to pass through the axially overlapping position of the second and subsequent rack teeth in the rack in the direction of rotation of the gear, and then engages the partial gear with the rack by engaging with the first rack teeth of the rack. I'm getting this started.
    Therefore, the tip shape of the second rack tooth does not have to be a special shape, so that the dimension can be configured in the same width as other teeth in the tooth width direction. As a result, the engagement strength between the second rack teeth and the second teeth of the gear is secured to some extent. In addition, the parts of the rack teeth become easy to be machined, and the positional accuracy of the gear rack does not have to be so high, so that assembly is easy.
    In addition to the above-described motion assist device, the first tooth of the partial gear is formed shorter in the axial direction than the second and subsequent teeth, and the first tooth in the rotational direction of the partial gear and the second and subsequent rack teeth of the rack. The first rack teeth of the rack are formed longer in the axial direction than the second and later rack teeth, and the engagement of the partial gears and the rack is achieved by allowing the first rack teeth of the rack to pass through the axially overlapping positions. It is configured to get started. As a result, the rack can be disengaged from the partial gear so that the rack can be easily returned to its original position manually. The first teeth of the partial gear also begin to engage securely with the first rack teeth of the rack. As a result, the other teeth are precisely engaged with each other.
    In addition to the above-described motion assist device, the partial gear is formed integrally with the flat gear having a larger outer diameter than the partial gear, and is configured to receive the driving force of the motor with the flat gear, and the rack overlaps a part of the flat gear. Is placed in position. Therefore, when the position detection between the rack and the partial gear is required for control, the flat gear and the rack, which are integrally rotated with the partial gear, are arranged so that the position can be easily detected.
    1 is a plan view showing the internal mechanism of the operation assisting device having an engagement structure between a partial gear and a rack in an embodiment of the present invention.
    FIG. 2 is a cross-sectional exploded view showing a state in which the protruding member return means and the switch unit and their surroundings are removed from the internal mechanism of the operation assistance device shown in FIG. 1; FIG.
    FIG. 3 is a view in the same direction as in FIG. 1, illustrating an engagement structure between a partial gear of the third gear and a rack formed on the protruding member.
    4 is a cross-sectional view taken along line IV-IV of FIG. 3.
    Figure 5 is a longitudinal sectional view showing the appearance of a refrigerator with an operation aid in the embodiment of the present invention.
    6 is a cross-sectional view showing a motor actuator as a conventional operation assistance device.
    7 is a plan view showing an engagement structure of a conventional partial gear and a rack.
    Fig. 8 is a diagram showing a modification of the partial gearing of the operation assistance device shown in Fig. 2, (A) is a partial side view thereof, and (B) is a view seen from the arrow B direction of (A).
    Next, the engagement structure of the gear and the rack and the operation assisting device in the embodiment of the present invention will be described with reference to FIGS. 1 to 5. In addition, in the present embodiment, an example in which the engagement structure between the gear and the rack of the present invention is used in the motion assisting device will be described. However, the present invention may be used for other devices as well as the motion assisting device.
    As shown in Figs. 1 and 2, the operation assistance device 1 includes a DC motor (then simply referred to as a motor) 2, a gear lubrication heat 3 for transmitting a driving force of the motor 2, and a gear lubrication heat ( 3) The return member which slides by the driving force of the motor 2 input through 3) and is able to contact the opening-closing member 4, such as a door, and the projection member 5 after a slide movement to return to an origin position. The coil spring 6 as a means, the switch part 7 which generate | occur | produces the switch signal for stopping the drive of the motor 2 after moving the protrusion member 5 by a predetermined amount, and the case which accommodates these parts inside. Has (8)
    The motor 2 is fixed in the motor fixing portion 21 formed in the case 8. The motor fixing part 21 is formed so as to surround the motor 2, and the vibration of the motor 2 provided so that the input terminal connection end plate 21a of the motor 2 and the side of the motor 2 is provided. The impact material 21b for suppressing and the end surface 21c of the side of the output shaft 22 of the motor 2 are provided. The output shaft 22 of the motor 2 protrudes into the inner space of the case 8 from the hole formed in the end plate 21c of the motor fixing part 21. In addition, the motor 2 is controlled to be rotated in only one direction by a control device (not shown) provided outside the case 8, and operates the protruding member 5 only in the opening direction through the gear lubrication heat 3. Therefore, the control device of this embodiment does not require a circuit for driving the motor 2 in the opposite direction.
    The worm 34 constituting a part of the gear lubrication heat 3 is attached to the portion protruding from the motor fixing portion 21 of the output shaft 22 of the motor 2 to enable integral rotation through the connecting plate 34a. do. Therefore, the driving force of the motor 2 is decelerated and transmitted to the gear lubrication heat 3 side via the worm 34. Further, the tip portion of the worm 34 is rotatably supported by the bearing portion 23 formed in the side wall of the case 8. The gear wheels 3 include the worm 34, a first gear 31 engaged with the worm 34, a second gear 32 engaged with the first gear 31, and It consists of the 3rd gear part 33 which meshes with the 2nd gear part 32. As shown in FIG.
    The first gear 31 is rotatably supported by a metal shaft 24 supported at both ends by the case 8, and has a large diameter of the gear 31a engaged with the worm 34, and the second gear. It consists of the small tooth feed gear 31b which meshes with the receiving tooth 32a of (32). These receiving teeth 31a and the transfer gear 31b are integrally formed.
    If the second gear 32 is unduly applied in the direction in which the projection member 5 is pushed into the case 8 with respect to the projection member 5 during the operation of the protruding member 5 or in the direction to be drawn out from the case 8, It has a configuration that weakens the power. That is, the second gear 32 includes a tooth 31 that is engaged with the feed teeth 31b of the first gear 31, and a flat tooth 35 that becomes a tooth that is received by the third gear 33. The plate 32c made of SUS sandwiched between the feed gear 32b, the gear tooth 32a, and the gear 32b, and the gear tooth 32a and the gear tooth 32b which were put together, the state where the plate 32c was fitted. It is composed of a clutch spring (32d) for integrating the furnace and at the same time to counteract the overload.
    The receiving tooth 32a is disposed on the same axis as the transfer tooth 32b. The receiving tooth 32a is urged in the direction of the transfer tooth 32b by the clutch spring 32d between the rotary shaft 25 rotatably supported at both ends of the case 8 and the transfer tooth 32b. Moreover, the feed gear 32b is arrange | positioned integrally with the rotating shaft 25. As shown in FIG.
    In the normal operation, the second gear 32 constituted in this way is pushed to the feed gear 32b side by the biasing force of the clutch spring 32d, and the received gear 32a and the feed gear 32b are normal. ) Is integrally rotated while the plate 32c is fitted. When the receiving gear 32a receives the rotation of the first gear 31, the rotation is transmitted while decelerating from the feed gear 32b to the third gear 33.
    In addition, the receiving tooth 32a and the transfer tooth 32b are integrated by the biasing force of the clutch spring 32d as described above. For this reason, when the rotational force below the predetermined torque has been transmitted, the gear 32a and the feed gear 32b which receive are rotated integrally. However, when the transmitted rotational force is greater than or equal to the predetermined torque, the clutch spring 32d slips so that the rotational force is not transmitted, and the receiving tooth 32a and the transfer tooth 32b do not rotate integrally.
    With this configuration, when the opening and closing member 4 is manually operated in the closing direction (arrow B in FIG. 1), and the protruding member 5 is operated in the arrow C direction in FIG. 1, that is, inside the case 8. By the operation of the protruding member 5, the flat gear 35 of the third gear 33 rotates in the direction of the arrow E, and the force is transmitted to the feed gear 32b so that the feed gear 32b is reversed. Even if it is rotated, when this rotation force is more than predetermined torque, it will not be transmitted to the tooth 32a which receives.
    Further, when the protruding member 5 is pulled straight forward and the protruding member 5 is operated in the direction of the arrow D of FIG. Even if the flat gear 35 of the three-gear part 33 rotates in the direction of arrow F, the force is transmitted to the feed gear 32b, and the feed force 32b rotates, even if this rotation force is more than the predetermined torque, It is not delivered to (32a). That is, even when the opening and closing member 4 is closed with a strong force or pulls the protruding member 5 with an excessive force, it is possible to prevent the feed tooth 32b from idling and damaging the tooth tip of each tooth. In addition, the overload prevention mechanism of the second gear 32 has the protruding member 5 stopped at the protruding position when the driving control of the protruding member 5 becomes impossible due to a failure of the control device. Even if the return is effective.
    The third gear 33 has a large diameter flat gear 35 which is freely supported at both ends of the rotational center shaft on the shaft support portion formed in the case, and meshes with the feed gear 32b of the second gear 32. It consists of the flat gear 35 and the partial gear 36 of the small diameter used as the gear of this invention provided on the same shaft. These flat teeth 35 and partial gears 36 are integrally formed.
    The flat gear 35 is a tooth received by the third gear 33 receiving the driving force of the motor 2 from the feed tooth 32b of the second gear 32, and the teeth of the second gear 32 It receives the rotation and rotates integrally with the partial gear 36. On the side of the flat gear 35 on which the partial gear 36 is provided, a switch signal for stopping the power supply to the motor 2 is output to the switch unit 7 so that the cam groove for operating the switch unit 7 ( 35a) is formed. In addition, the structure of the switch part 7 is mentioned later.
    The partial gear 36 becomes the final stage of the gear lubrication heat 3, and is rotated only in one direction by the driving force of the motor 2. The partial gear 36 is coupled to the rack teeth 51a of the rack 51 formed on the protruding member 5 to be separated. Next, the engagement structure between the partial gear 36 and the rack 51 will be described in detail.
    The partial gear 36 has a toothed portion 36a which is coupled to the rack teeth 51a only at a part of the outer circumference thereof, and a toothless portion 36b having no teeth is formed at the other portion. Therefore, in the partial gear 36, when the toothed portion 36a faces the rack 51, the toothed portion 36a engages with the rack tooth 51a, but the toothed portion 36b faces the rack 51. When doing so, the coupling relationship with the rack teeth 51a is broken.
    In addition, the teeth 36a of the partial gear 36 and the rack teeth 51a of the rack 51 are always engaged with each other. That is, as shown in FIG. 3, the first tooth 36a1 in the rotational direction of the partial gear 36 is engaged with the first rack tooth 51a1 in the slide movement direction of the rack 51.
    3 and 4, the first teeth 36a1 of the partial gear 36 are formed shorter in the axial direction than the other teeth 36a after the second. For this reason, when the engagement of the partial gear 36 and the rack 51 starts, the 1st tooth 36a1 passes through the axially overlapping position of the rack tooth 51a2, without hitting the 2nd rack tooth 51a2. After passing through the first rack teeth (51a1) and at the same time the second teeth (36a2) to be able to contact the second rack teeth (51a2).
    In other words, when engaging the teeth in a deep and secure manner when engaging the circular partial gear 36 and the linear rack 51, the rack 51 in the rotational track L of the teeth 36a of the circular partial gear 36 is engaged. ), The second rack 51a2 from the head is arranged in the moving direction. For this reason, the problem arises that the first tooth 36a1 of the partial gear 36 hits the second rack tooth 51a2 before hitting the first rack tooth 51a of the rack 51 so that it does not mesh smoothly. Therefore, conventionally, as shown in Fig. 7, the tip of the second rack teeth 114a2 is shaved to prevent the first teeth 113a1 of the partial gear 113 from colliding with each other.
    Therefore, the engagement structure of the present invention makes the length of each tooth of the partial gear 36 and the rack 51 the same as other teeth, and the first tooth 36a1 of the partial gear 36 is the second rack tooth of the rack 51. To pass through the axially overlapping position of 51a2, and to adjust the engagement position between the partial gear 36 and the rack 51 by engaging with the first rack teeth 51a1 of the rack 51 after the passage. Doing.
    On the other hand, the rack 51 formed in the protruding member 5 is freely coupled and separated with the above-described partial gear 36, and has the same number of rack teeth 51a as the teeth 36a of the partial gear 36. have. In the slide movement direction of the rack 51, the first rack teeth 51a1 are formed longer in the axial direction than the second and second rack teeth 51a. Thereby, the first tooth 36a1 of the partial gear 36 which has passed through the axially overlapping position of the second rack tooth 51a2 can be contacted. The first rack teeth 51a1 face the first teeth 36a1 of the partial gears 36 passing through the lower side in FIG. 2 of the second rack teeth 51a2, and thus the partial gears 36 and the rack ( The position of engagement with 51) can be determined.
    Then, after the first teeth 36a1 and 51a1 come into contact with each other, when the partial gear 36 rotates in the direction of arrow F in FIG. 1 again, the racks 51 are engaged with the teeth 36a and the rack teeth 51a in order. It is gradually linearly moved forward (in the direction of arrow D in FIG. 1). At this time, the number of teeth engaged at the same time is, for example, three required for this slide movement.
    The protruding member 5 in which the rack 51 is formed is coupled to the teeth of the partial gear 36 of the final stage of the tooth teeth 3 by receiving the driving force of the motor 2. Guide rails 10 (see Fig. 2) formed in the case 8 are guided to slide in the direction of arrow D in Fig. 1. The protruding member 5 is formed of a long member, and the rack 51 described above is formed near the rear end. And the part in which this rack 51 was formed is arrange | positioned so that it may overlap with the part of the flat gear 35 formed integrally with the partial gear 36. As shown in FIG. When the rack 51 is configured to overlap a part of the flat gear 35, for example, a magnet is used to form the position detecting means between the rack 51 and the third gear 33. It becomes easy to place it.
    In addition, as shown in FIG. 1, the locking portion 52 having the recess 52a is provided in the vicinity of the rear end of the protruding member 5, and the tip of the plate spring 15 is coupled to the recess 52a. . As a result, the protruding member 5 is securely fixed in the case 8. In addition, between the rear end of the protruding member 5 and the case 8, a cushioning material for alleviating the impact on the case 8 when the protruding member 5 returns to the origin position by the force of the coil spring 6 ( 83) is disposed.
    The protruding member 5 receives the driving force of the motor 2 and rides over the locking portion of the locking portion 52 to the plate-shaped spring 15, and slides in the direction of the arrow D so that the leading end portion of the protrusion 8 ) To project outward. The opening / closing member 4 mentioned above is arrange | positioned at the part which protrudes from this case 8. That is, the protruding member 5 slides outwardly (in the direction of arrow D in FIG. 1) by the driving force of the motor 2 to contact the opening / closing member 4 to open the opening / closing member 4 in the opening direction (see FIG. Will protrude in the A direction).
    In addition, the portion extending from the middle portion of the protruding member 5 to the tip portion is accommodated in the guide cylinder 11 formed in the case 8, and the tip portion is external from the guide cylinder 11 by the driving of the motor 2 described above. It is supposed to protrude. As for the arrangement of the protruding member 5, the arrangement relationship between the protruding member 5 and the opening / closing member 4 and the contacting member 5 of the protruding member 5 from the time of starting the motor 2 are brought into contact with the opening / closing member 4. This can be changed appropriately by various relationships such as the relationship of time control.
    In addition, the operation assisting device 1 has a compression type coil spring 6 for returning the protruding member 5 to the position (home position) before the slide movement when the protruding member 5 and the partial gear 36 are uncoupled. It is provided in the case 8. The coil spring 6 is compressed by the operation of the protruding member 5, and when the rack 51 of the protruding member 5 and the partial gear 36 are released in the compressed state, the coil spring 6 exerts an elastic energy to extrude the protruding member. Return (5) to the home position. In addition, in the protruding member 5 returned to the home position, the locking portion 52 is locked to the plate-shaped spring 15, and is fixed at the home position in the case 8.
    In addition, when the coupling between the protruding member 5 and the partial gear 36 is released in the case 8 and the driving force of the motor 2 is not transmitted to the protruding member 5, power is supplied to the motor 2. It is provided with a switch unit 7 for outputting a switch signal for disconnecting. The switch portion 7 comprises a switch piece portion 71 having a guide piece 71c having a guide pin 71e engaged with the cam groove 35a formed in the flat gear 35, and the switch piece portion 71 as a whole. In FIG. 1, it consists of a spring 72 for rotating in the arrow H direction, and the duct switch 73 which contacts the switch piece 71a of the switch piece 71. As shown in FIG. At the timing at which the protruding member 5 and the partial gear 36 are disengaged, the guide pin 71e moves to the outer side of the wide portion 35c of the cam groove 35a. When it moves by the negative force in the direction, the switch piece 71a rotates in the arrow H direction and contacts the duct switch 73 by this. By this operation, a stop signal for driving stop of the motor 2 is output.
    The cam groove 35a of the flat gear 35 is composed of a width portion 35b having a narrow groove width and a width portion 35c having a wide groove width, and the narrow width portion 35b at which the guide piece 71c enters. The input of the above-mentioned duct switch 73 is performed when converting into the wide width part 35c. In addition, the timing at which the switch signal is output for this driving stop is at any time after the partial gear 36 and the rack 51 are uncoupled and before the partial gear 36 is rotated enough to engage the rack 51 again. good.
    When the driving start signal is input to the operation assistance device 1 again after the driving stop like this, and the driving of the motor 2 starts, the position where the guide piece 71c is inserted in the middle of the driving is inversely wide in width 35c. In the narrow width portion 35b. In this case, the switch piece 71a in contact with the duct switch 73 is separated from the duct switch 73 by the tension force of the tension spring 72, but at this time, no signal is output in particular. The preparation operation included in the signal output is performed.
    In addition, the tension spring 72 has a bias force in the compression direction, one end is locked to the support shaft 17 provided in the case 8 and the other end is fixed to the engaging piece 71b of the switch piece portion 71 described above. . Therefore, the tension spring 72 is provided with the force which rotates the switch piece 71 to the arrow H direction by tensioning the engaging piece 71b to the always arrow G direction. The duct switch 73 is disposed at a position where the switch piece 71a can be contacted by the switch piece 71 rotating in the arrow H direction. The duct switch 73 is arranged on the circuit board 74 and generates a drive stop signal for stopping the motor 2.
    The operation assistance apparatus 1 configured as described above is attached at a position opposite to the door 94 of the frame 93 of the refrigerator 92 as a housing as shown in FIG. 5. In other words, the operation assistance device 1 is a device for assisting the opening of the door 94 of the refrigerator 92. In addition, the door 94 is for opening / closing the open end of the refrigerating compartment 95 formed in the refrigerator 92, and one end is freely supported by a part of the open end of the refrigerating compartment 95. That is, in the above-mentioned embodiment, the door 94 corresponds to the opening / closing member 4. At the other end of the door 94, a suction magnet 96 is provided, and when the door 94 is closed, the door 94 is attached to a part of the open end of the refrigerating chamber 95 by the magnetic action. It becomes. The operation aid 1 is attached to the refrigerator 92 to push the door 94 forward against this suction lock.
    In this way, the operation assisting device 1 attached to the refrigerator 92 is configured such that the driving switch is input when the user touches the handle 97 provided on the front surface of the door 94 of the refrigerator 92. Therefore, when the user touches the handle, the door 94 is pushed forward to the position where the suction is not fixed, and then the door 94 can be opened with a light force.
    In addition, even if the coil spring 6 is caught by the case 8 and the protruding member 5 does not return to the home position and stops at an intermediate position, the rack 51 of the protruding member 5 is partially shifted from the partial gear 36. Since the door 94 is not engaged, the protruding member 5 can be easily returned to the home position by closing the door 94 or manually.
    In addition, when the driving of the protruding member 5 is completed, the partial gear 36 and the rack 51 are disengaged, and the partial gear 36 is rotated in the same direction again to guide the switch unit 7. The piece 71c is guided to the cam groove 35a of the flat gear 35 and rotates in the arrow H direction in FIG. That is, the position where the guide piece 71c enters is changed from the narrow part 35b of the cam groove 35a to the wide part 35c, so that the switch piece 71 of the switch part 7 becomes the tension spring 72. It rotates in the direction of arrow H by the negative force in the tension direction (arrow G direction). As a result, the switch piece 71a of the switch piece 71 contacts the duct switch 73. For this reason, the switch signal for driving stop of the motor 2 is output from the duct switch 73, and the electric power supply to the motor 2 is stopped by control of a control apparatus. As a result, rotation of the 1st, 2nd and 3rd gear parts 31, 32, 33 by the drive of the motor 2 is stopped.
    In addition, although the Example mentioned above is an example of suitable embodiment of this invention, it is not limited to this, A various deformation | transformation is possible in the range which does not deviate from the summary of this invention. For example, in the above-described embodiment, the operation assistance device 1 is attached to the refrigerator 92, but is not particularly limited thereto. It may be attached to a thing having a door.
    In this embodiment, the protruding member 5 can be in direct contact with the opening and closing member 4, but the protruding member 5 may be indirectly in contact with the opening and closing member 4 through any member. .
    In the operation assistance apparatus 1 of the above-described embodiment, the motor 2 is driven by bringing the switch piece 71a into contact with the duct switch 73 after the coupling between the partial gear 36 and the rack 51 is released. A signal for stopping is output and the rotation of the partial gear 36 is stopped. Alternatively, the motor 2 may be stopped at a timing after the engagement is released by another method.
    For example, the motor 2 may be stopped at a timing after the coupling is released by using a change in the current value flowing in the motor 2. That is, the current value flowing in the motor 2 has the highest current at startup. Subsequently, the protruding member 5 pushes the door 94 also high. In addition, since the motor 2 is driven against the bias force of the coil spring 6 while the protrusion member 5 is protruded in the direction of the door 94, the load to the motor 2 is gradually increased so that the motor 2 The current value flowing through) also gradually rises accordingly. Then, when the door 94 is strongly closed and the partial gear 36 and the rack 51 are uncoupled, the load on the motor 2 decreases at one time, so that the current flowing through the motor 2 also decreases at one time. By using this change in current value, the power supply to the motor 2 may be stopped at the timing of loosening the coupling.
    In this case, when the input of the operation assistance device 1 is turned on, for example, by touching the knob 97, the measurement reference time is not used, and then the driving time of the motor 2 is controlled. Alternatively, the stop time of the motor 2 may be set by other control methods such that the partial gear 36 is stopped at a predetermined position.
    In the present embodiment, the partial gearing is formed integrally with the flat gear having a larger outer diameter than the partial gearing, but may be formed with the same outer diameter as in the modification of FIG. 8. When formed with the same outer diameter, when the protruding member starts to contact the opening / closing member, the tooth is joined together with the protruding member together with the gear forming the gear lubrication heat of the front end of the partial gear. The location where the strength is strong, that is, the entire toothed portion can be used. For this reason, the thin portion of the partial gear tooth does not need to be thickened to increase the strength, so that the entire thickness of the partial gear can be made thin and the thickness of the entire apparatus can be reduced.
    As described above, according to the operation assistance apparatus of the present invention, the protruding member after protruding forward to assist the operation of the opening and closing member by the driving force of the motor is disconnected from the gear teeth by loosening the coupling gear. The user can easily easily retract the protruding member to the inside (home position direction).
    权利要求:
    Claims (8)
    [1" claim-type="Currently amended] A gear wheel for transmitting the driving force of the motor and a protrusion member which slides by the driving force of the motor input through the gear wheel heat and which is in direct or indirect contact with the opening / closing member, and is opened and closed by a slide operation of the protrusion member. An operation assisting device for assisting the operation of a member, comprising: providing a partial tooth having a toothed portion engaged with the protruding member and a toothless portion where the protruding member is disengaged from the tooth lubrication row; By sliding the protruding member to assist the operation of the opening and closing member, the engagement with the protruding member by the toothless portion is released so that the driving force of the motor is not transmitted to the protruding member and at the same time The force at the member is prevented from being transmitted from the partial gear to the motor side. Motion assistance device.
    [2" claim-type="Currently amended] The method of claim 1,
    The tooth portion forms a thicker thickness in the axial direction of the tooth than the toothless portion and couples to both the protruding member and the teeth constituting the tooth lubrication row at the front end of the partial tooth, while the toothless portion is And a tooth having a thinner thickness in the axial direction than the tooth portion and engaging only one side of the gear forming the gear lubrication train at the front end of the partial gear.
    [3" claim-type="Currently amended] The method of claim 2,
    And the teeth constituting the gear lubrication heat of the front end of the partial gear together with the protruding member when the protruding member starts to contact the opening / closing member.
    [4" claim-type="Currently amended] The method of claim 1,
    And a protruding member returning means for returning the protruding member to a position before the slide movement when the protruding member and the partial gear are uncoupled.
    [5" claim-type="Currently amended] The method of claim 1,
    And a current detecting means for detecting a current value of the motor, and configured to stop the motor using the detected current value.
    [6" claim-type="Currently amended] The method of claim 1,
    A rack is formed on the protruding member, and the coupling is engaged with the rack and the gear, and when the rack and the tooth are fitted, the first tooth is the first tooth, respectively, in the rotational direction of the partial gear. Allowing the first tooth to pass through a position axially overlapping with the second and subsequent rack teeth of the rack, and after this passage, the engagement of the partial gear with the rack begins by engaging with the first rack tooth of the rack. Motion assistance device, characterized in that.
    [7" claim-type="Currently amended] The method of claim 6,
    The first tooth of the partial gear is formed shorter in the axial direction than the second and subsequent teeth, and the first tooth passes in the axial direction overlapping with the second and subsequent rack teeth of the rack in the rotational direction of the partial gear. At the same time, the first rack teeth of the rack are formed axially longer than the second and later rack teeth, and the engagement between the partial gear and the rack starts by engaging with the first rack teeth of the rack. Motion assistance device, characterized in that.
    [8" claim-type="Currently amended] The method of claim 6,
    The partial gear is formed integrally with a flat gear having a larger outer diameter than the partial gear, and is configured to receive the driving force of the motor with the flat gear, and the rack is disposed at a position overlapping a part of the flat gear. Motion aid.
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    同族专利:
    公开号 | 公开日
    CN1274189A|2000-11-22|
    CN1186870C|2005-01-26|
    TW472431B|2002-01-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1999-05-12|Priority to JP13133499A
    1999-05-12|Priority to JP99-131341
    1999-05-12|Priority to JP13134199A
    1999-05-12|Priority to JP99-131334
    1999-09-08|Priority to JP25378299A
    1999-09-08|Priority to JP99-253782
    2000-05-10|Application filed by 고구치 유죠, 가부시기가이샤 산교세이기 세이사꾸쇼
    2001-03-15|Publication of KR20010020827A
    2002-11-13|Application granted
    2002-11-13|Publication of KR100360508B1
    优先权:
    申请号 | 申请日 | 专利标题
    JP13133499A|JP3519313B2|1999-05-12|1999-05-12|Motion assist device and motion assist device for refrigerator|
    JP99-131341|1999-05-12|
    JP13134199A|JP3591628B2|1999-05-12|1999-05-12|Motion assist device and motion assist device for refrigerator|
    JP99-131334|1999-05-12|
    JP25378299A|JP3746927B2|1999-09-08|1999-09-08|Gear and rack meshing structure and motion assist device|
    JP99-253782|1999-09-08|
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