• 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:
    The present invention relates to a method of manufacturing a magnetic body for a buzzer for a buzzer and a communication buzzer using the same, and more particularly, to a method of manufacturing a magnetic body for a buzzer for a buzzer which is used in a communication device such as a portable telephone, a PCS telephone, By eliminating the PCB, metal bottom plate and conventional magnet body, which can only be constituted by conventional buzzer, it is possible to reduce the number of parts, thereby reducing cost, increasing productivity, improving the defective assembly rate of products, and minimizing finished products by reducing the number of parts A magnet body having a circumferential wall portion and a bottom wall portion integrally formed thereon is injection-molded so as to have a space of a certain size inside thereof, and a stepped groove is formed at an upper end of the circumferential wall portion And the bottom surface portion is formed by inserting a pair of lead wires and a shaft at the center of the bottom surface portion, and integrally molding by injection molding. In the case of the magnet body according to the present invention, the shaft is fixed in the form of being integrally embedded with the insert injection in the middle of the bottom face portion, so that the shaft can be accurately positioned in the center of the magnet body, Since the injection molding is integrally performed so that the stepped groove is formed at the upper end of the circumferential wall constituting the magnet body, the gap (distance) between the diaphragm provided in the stepped groove and the shaft can be always kept constant, Since the shaft is fixed to the center as described above, the core and the circumferential wall of the magnet body are always installed at a constant distance from each other, In addition, by maximizing the magnetic force absorption of the magnet body by increasing the cross-sectional area of the portion embedded in the magnet body, it is possible to utilize sufficient magnetic force even if the magnet body is extremely miniaturized, It is possible to obtain various useful effects such as being able to eliminate factors.
    公开号:KR19980087860A
    申请号:KR1019980039895
    申请日:1998-09-25
    公开日:1998-12-05
    发明作者:이수형
    申请人:이수형；
    IPC主号:
    专利说明:

    Method for manufacturing a magnetic body for communication buzzer and communication buzzer using the same
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a magnetic body for communication use for a communication device such as a portable telephone, a PCS telephone, and a wireless pager, and a communication buzzer using the same.
    BACKGROUND ART Generally, a DC buzzer used in a small-sized communication device is used as a component of a communication device such as a portable telephone, a PCS telephone, and a wireless pager.
    Since such communication devices have become smaller in recent years, finished products used therefor are also manufactured to be smaller in order to meet the miniaturization.
    The buzzer will be described in detail with reference to FIG. 1 attached hereto.
    The DC buzzer presses the lead wire 1 onto a PCB (Print Circuit Board) 2 and aligns the center of the bottom plate 3 with the center of the PCB 2 to which the lead wire 1 is coupled to penetrate the shaft 4 And then,
    5 or 5 of the core 5 is taken out by inserting the core 5 wound around the shaft 4 or by winding the core 5 wound in advance on the shaft 4 so that the positive electrode 5 or the negative electrode 5 of the PCB 2 And the magnet body 6 is installed at a predetermined interval on the outer periphery of the core 5,
    A vibrating plate 8 is installed on the top of the vibrating plate support 7 after the cylindrical vibrating plate support 7 is mounted on the top plate 3 with the core 5 positioned therein, next,
    The outer case 9 is covered with the outer case 9 and the filling material 10 is sealed between the outer case 9 and the PCB 2 to constitute a series of buzzer 11. [
    This conventional buzzer 11 generates sound due to vibrating noise generated by vibrating the diaphragm 8. This is because the magnetic field generated by the magnet body 6 is absorbed by the bottom plate 3, Absorbing the magnetic field of the body 6 and transmitting it to the shaft 4, the diaphragm 8 is always constantly bent by the magnetic field.
    In this state, when a current is passed through the lead wire 1 through the PCB 2, a magnetic field generated in the core 5 is applied through the shaft 4 to further bend the diaphragm 8 , A magnetic field is not generated in the shaft 4 when the current is interrupted again. Therefore, the vibration is generated by repeatedly performing the shaking phenomenon occurring when the bent diaphragm 8 returns to the original position.
    In the conventional buzzer 11, the bottom plate 3 is used as a path for a magnetic field, and the PCB 2 is used as a current path, so that the bottom plate 3 must use a conductive material as a metal material. The current drawn or drawn out from the core 5 is short-circuited and the buzzer 11 is not driven unless the power supply 2 is used.
    And the assembly of the core 5 and the magnet body 5, which are seated on the bottom plate 3, must be precisely centered at a certain distance.
    In other words, if the center of the core 5 and the magnet body 5 do not match, the diaphragm support 7, which is fitted to the outer periphery of the magnet body 5, becomes eccentric, The diaphragm 8 becomes eccentric, so that the diaphragm 8 can not be driven correctly.
    In addition, a constant gap must always be maintained between the upper end of the shaft 4 and the diaphragm 8. If a slight difference occurs in the gap, the diaphragm 8 has a significant effect on the frequency characteristics. There is a problem that a constant gap can not be maintained as described above due to an error in the dimension variation due to non-uniformity of force at the time of pressing the press.
    As described above, although the buzzer is used for a communication device which is minimized, the smaller the number of components used is, the smaller the number of parts can be easily reduced, and the assembly precision and the productivity can be improved on the basis thereof. The conventional buzzer has a structure in which the bottom plate 3 is adhered to the PCB 2 and then the core 5 and the magnet body 6 are precisely centered so as to have an arc having a constant gap on the bottom plate 3 The diaphragm support 7 fitted to the outer periphery of the magnet body 6 can also be centered so that the diaphragm 8 can be precisely engaged in the center, The productivity is greatly lowered due to an increase in the number of products,
    The core 5 can be centered by the rivets of the shaft 4 on the center hole formed in the bottom plate 3 but the magnet body 6 used therein can be separately mounted on the diaphragm support 7 Since the magnet body 6 to be used is sintered with a ferrite magnet, it is necessary to simultaneously press-mold the grooves that can seat the thin diaphragm 8 And the post-processing is not easy. Therefore, the vibration plate support 7 must be separately manufactured and assembled, so that the productivity also has to be reduced.
    SUMMARY OF THE INVENTION The present invention has been made to overcome the above-described problems of the prior art, and the present invention has the following objectives.
    The present invention reduces the demand for components to a minimum and enables manufacturing while maintaining the accuracy of assembly, thereby simplifying the production process, improving productivity,
    The present invention eliminates PCB, metal bottom plate, and conventional magnet body which are inevitably constituted in conventional buzzer, thereby reducing the number of parts, thereby reducing cost, increasing productivity, improving the defective assembly rate of a product, And to minimize the product.
    In order to accomplish the above object, in the present invention, a cylindrical magnet body is injection-molded by using a plastic magnet pellet generating a magnetic field while interrupting a current, and a shaft is inserted and molded integrally with the shaft, To be centrally located,
    Further, when the cylindrical magnet body is injection-molded, stepped grooves for precisely positioning the diaphragm can be formed at the same time so that the shaft can be accurately positioned at the center of the diaphragm,
    The shaft area of the portion embedded in the magnet body is maximized to maximize the magnetic force absorption of the magnet body so that the magnet body can be miniaturized and sufficient magnetic force can be utilized to maintain the miniaturization and stability of the drive.
    1 is a cross-sectional view showing the configuration of a buzzer as a conventional diagram,
    2 is an exploded perspective view showing the present invention,
    FIG. 3 is a sectional view of the coupled state of FIG. 2,
    4 shows another embodiment of the present invention,
    5 shows an embodiment of the shaft of the invention,
    FIG. 6 and FIG. 7 are other embodiments of FIG. 5; FIG.
    DESCRIPTION OF THE REFERENCE NUMERALS
    1,25: Lead wire 2: PCB
    3: bottom plate 4,26: shaft
    7: diaphragm support member 8: diaphragm plate
    21: main wall part 22: bottom part
    24: magnet body 33: multi-stage shaft
    34: conical shaft 35: conical shaped embedding part
    36: conical hole 45, 45 ': hole
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail.
    A magnet pellet formed of a magnet pellet generating a magnetic field while interrupting a current, for example, a magnet pellet composed of a Strontium ferrite and a Polyphenylene Sulfide, is formed by molding a magnet body having a circumferential wall portion and a bottom wall portion integrally so as to have a predetermined- A stepped groove is formed in the bottom surface portion and a shaft is inserted in the middle of the lead wire and the bottom surface portion of the bottom surface portion to integrally perform injection molding to provide the magnet body required in the present invention.
    In the case of the magnet body according to the method of the present invention, since the shaft is fixed integrally with the insert injection in the center of the bottom face portion, the shaft is precisely positioned in the center of the magnet body, The distance (distance) between the diaphragm provided in the stepped groove and the shaft can be maintained at a constant level since the injection molding is integrally performed so that the stepped groove is formed at the upper end.
    Since the shaft is fixed to the center as described above, it is always installed at a constant distance from the inserted core and the main wall of the magnet body.
    In other words, when the magnet body is cylindrical, the arc can be maintained between the core and the magnet body, so that the induction of the magnetic field can be always made constant.
    According to the present invention, by maximizing the magnetic force absorption of the magnet body by increasing the cross-sectional area of the portion embedded in the magnet body, it is possible to utilize sufficient magnetic force even if the magnet body is extremely miniaturized.
    The present invention can be carried out by separating and forming the circumferential wall portion and the bottom surface portion constituting the magnet body and then bonding them.
    At this time, injection molding is performed so that a stepped groove is formed at the upper end when the above-mentioned circumferential wall portion is injected, and a shaft is inserted so as to be positioned in the center with the lead wire when injecting the bottom portion, .
    FIG. 1 is a perspective view of a wind turbine according to an embodiment of the present invention; FIG.
    2 and 3 are an exploded perspective view and an engaging sectional view for specifically embodying the present invention.
    A buzzer for generating a buzzer sound by intermittently or periodically generating and interrupting a magnetic field generated by a core sandwiched between shafts to shake the diaphragm,
    A magnet body 24 having a circumferential wall portion 21 and a bottom wall portion 22 formed integrally with the circumferential wall portion 22 so as to have a space portion 20 of a predetermined size inside the magnet pellet, A stepped groove 23 is formed in the upper end of the bottom surface portion 21 and a pair of lead wires 25 and a shaft 26 are inserted into the center of the bottom surface portion 22, A common core 5 is provided on the shaft 26 and both ends thereof are respectively connected to the pair of lead wires 25 and a normal vibration plate 8 is provided in the stepped groove 23. [ do.
    Reference numeral 9 is an ordinary case.
    At this time, as shown in FIG. 4, the main body 21 and the bottom surface 22 of the magnet body 24 are injection-molded separately and can be integrally formed by bonding. have.
    At the time of bonding, the magnetic field should be transmitted.
    When the main wall portion 21 and the bottom wall portion 22 are injection molded separately, the main wall portion 21 is injection-molded so as to form a stepped groove 23,
    When the bottom surface portion 22 is injection molded separately, the shaft 26 is inserted into the center of the pair of lead wires 25 and the bottom surface portion 22 so as to be integrally injection-molded.
    5, the shaft 26 directly transmits the magnetic field to the diaphragm 8, and the upper shaft 31 'and the magnet body (not shown), in which the core 5 is installed, The two shafts 33 'having different diameters may be formed in the lower shaft 32' embedded in the bottom portion 22 constituting the upper and lower shafts 24 and 24.
    The forms as shown in the above-mentioned Double reduction shaft (33 ') has an upper shaft (31 ") diameter length L' 1, the lower shaft (32 'diameter length) L' 2 between the L of the" 1 <L "2 of .
    This is because the lower shaft 32 'having the longest diameter is injection-molded so as to be embedded in the bottom surface portion 22 of the magnet body 24 including the magnetic field, So that the diameter of the upper shaft 31 'having the magnetic attraction force is maximized while the magnetic force of the magnetic field is maximized while the diameter of the upper shaft 31' is relatively small.
    Since the two-stage shaft 33 'has a plurality of different diameters, the two-stage shaft 33' is not embedded in the bottom portion 22, and the two-stage shaft 33 ' then it gave to form a shaft (33 ') an upper shaft (31 ") diameter length L' 2, the lower shaft (32") diameter length L '3 and the hole (45 of the same magnitude ") of this hole ( 45 'by fitting the two-stage shaft 33' below.
    At this time, bonding may be performed by an adhesive means within a range in which the magnetic field can flow as needed.
    By such an installation, the hole 45 'is injection-molded so as to be positioned in the center when the magnet body 24 or the bottom face portion 22 is injection-molded, so that the two-stage shaft 33' .
    The lower shaft 22 is embedded in the bottom surface 22 of the magnet body 24 as in the case of the two-stage shaft 33 ' And conical shaft 34 composed of conical buried portions 35, which are inverted triangular cross-sections, as shown in Fig.
    Since the conical shaft 34 is formed of the conical type buried portion 35, it can be integrally injection-molded when the magnet body 24 or the bottom face portion 22 is formed. However, A conical hole 36 is formed in the center of the magnet body 24 or the bottom surface portion 22 so that the buried portion 35 can be easily inserted.
    By fitting the buried portion 35 of the conical shaft 34 into the conical hole 36, the assembly can be easily carried out. At this time, bonding can be carried out by an adhesive means Bonding).
    At this time, since the conical hole 36 formed by injection molding is formed in the center of the bottom surface portion 22, the conical shaft 34 installed thereon is also positioned in the center after installation.
    In the present invention, the two-stage shaft 33 'described above can be constructed in three steps as shown in FIG.
    That is, the upper end 30 that directly transmits a magnetic field to the diaphragm 8, the center end 31 where the core 5 is installed, and the lower end 22 which is embedded in the bottom surface 22 constituting the magnet body 24 (32) having different diameters are used to form the multi-stage shaft (33).
    The above-described multistage shaft 33 is the relationship between the diameter of length L 3 of the diameter of length L 2, a lower end 32 with a diameter of length L 1, the central stage 31 of the upper stage (30) L 1 <L 2 &Lt; L 3 .
    This is because the lower end 32 having the longest diameter is injection-molded so as to be embedded in the bottom surface portion 22 of the magnet body 24 including the magnetic field, thereby maximizing the contact area with which the bottom surface portion 22 contacts So that the diameter of the upper end 30 having the magnetic attraction force is maximized while the diameter of the upper end 30 is relatively reduced, so that the magnetic attraction force is greatly applied to the diaphragm 8.
    Since the multi-stage shaft 33 is formed in a multi-stage structure with diameters different from each other, the multi-stage shaft 33 is inserted into the bottom surface portion 22 without being buried in the bottom surface portion 22 The hole 45 having the same diameter as the diameter L 2 of the center end 31 of the lower end 32 and the diameter L 3 of the lower end 32 is formed in the hole 45, (33) from below.
    At this time, bonding may be performed by an adhesive means within a range in which the magnetic field can flow as needed.
    With such an installation, the hole 45 is injection-molded so as to be positioned in the center when the magnet body 24 or the bottom face portion 22 is injection-molded, so that the multi-stage shaft 33 is assembled so as to be positioned in the center .
    In the present invention, the cross-sectional area of the portion in which the shaft 26 is embedded in the magnet body 24 is composed of the two-stepped shaft 33 'and the multi-stepped shaft 33 as described above, So that absorption of the magnetic force of the magnet body 24 is maximized, so that sufficient magnetic force can be used even if the magnet body 24 is made extremely small.
    As described above, the buzzer according to the present invention includes the shaft 26, the two-stage shaft 33 ', the multi-stage shaft 33, and the conical shape in the center of the bottom portion 22 in the case of the magnet body 24. [ The shaft 34 is fixed integrally with the insert injection so that the shaft 26 is accurately positioned in the center of the magnet body 24,
    The diaphragm 8 and the shaft 26 provided in the stepped groove 23 are integrally formed by injection molding so that the stepped groove 23 is formed at the upper end of the circumferential wall 21 constituting the magnet body 24, The distance (distance) between the two-stepped shaft 33 ', the multi-stepped shaft 33, and the conical shaft 34 can be kept constant.
    Since the shaft 26, the two-stage shaft 33 ', the multi-stage shaft 33 and the conical shaft 34 are fixed to the center as described above, the core 5 and the magnet body 24, It is always installed at a constant distance from the circumferential wall 21 of the housing.
    In other words, when the magnet body 24 is cylindrical, the arc can be maintained between the core 5 and the magnet body 24, so that the induction of the magnetic field can be always made constant.
    This buzzer of the present invention absorbs the magnetic field generated by the magnet body 24 directly from the shaft 26, the two-stage shaft 33 ', the multi-stage shaft 33 and the conical shaft 34, 8).
    In this state, when a current flows through the lead wire 25, a magnetic field generated in the core 5 is transmitted to the shaft 26, the two-stage shaft 33 ', the multi-stage shaft 33 and the conical shaft 34 So that the diaphragm 8 is further bent,
    The magnetic field due to the flow of electric current is not generated in the shaft 26, the two-stage shaft 33 ', the multi-stage shaft 33 and the conical shaft 34. Therefore, A sound is generated by repeatedly performing the shaking phenomenon that occurs while returning to the position.
    As described above in detail, the buzzer according to the present invention can reduce the number of components by eliminating the PCB, the bottom plate of metal material and the conventional magnet body, which must be constituted by the conventional buzzer, thereby reducing the cost, increasing the productivity, It is possible to improve the assembly defect rate and to pursue minimization of the finished product by the reduced number of parts,
    In the case of the magnet body, since the shaft is fixed in a form of being embedded integrally with the insert injection in the center of the bottom face portion, the shaft can be accurately positioned in the center of the magnet body,
    Since the injection molding is integrally performed so that the stepped groove is formed at the upper end of the circumferential wall constituting the magnet body, the gap (distance) between the diaphragm provided in the stepped groove and the shaft can be always kept constant,
    Since the shaft is fixed to the center as described above, the core and the circumferential wall of the magnet body are always installed at a constant distance from each other,
    Further, in the present invention, by maximizing the magnetic force absorption of the magnet body by increasing the cross-sectional area of the portion embedded in the magnet body, the magnet body can be utilized with sufficient magnetic force even if the magnet body is extremely miniaturized.
    For this reason, it is obvious that the present invention is a very useful invention capable of simultaneously obtaining various useful effects such as minimizing a communication device and improving a precision of a product, thereby eliminating a defective factor.
    权利要求:
    Claims (9)
    [1" claim-type="Currently amended] A stepped groove is formed at an upper end of the circumferential wall portion while a magnet body having a circumferential wall portion and a bottom face portion integrally formed by injection molding is formed so as to have a space portion of a predetermined size inside thereof with a magnetic pellet generating a magnetic field while intercepting a current, Wherein a shaft is inserted into the middle of the lead wire and the bottom face portion of the magnet body, and injection molding is performed integrally.
    [2" claim-type="Currently amended] The method according to claim 1,
    Characterized in that the magnet body is constituted by separating the main wall part in which the stepped groove is formed and a pair of lead wires and a bottom part for inserting the shaft so as to be located in the center and by injection molding and bonding the circumferential wall part and the bottom part part. A method of manufacturing a magnet body.
    [3" claim-type="Currently amended] A buzzer for generating a buzzer sound by intermittently or periodically generating and interrupting a magnetic field generated by a core sandwiched between shafts to shake the diaphragm,
    A magnet pellet for generating a magnetic field while interrupting an electric current is provided with a circumferential wall portion 21 in which a step groove 23 is formed at an upper end thereof and a pair of lead wires 25 and a shaft portion 26 inserted in the center, The magnet body 24 is formed by injection molding so that the core body 22 is integrally formed with the shaft 26. A common core 5 is provided on the shaft 26 and both ends thereof are respectively connected to the pair of lead wires 25 , And a normal diaphragm (8) is provided in the stepped groove (23).
    [4" claim-type="Currently amended] The method of claim 3,
    The main wall portion 21 on which the stepped groove 23 is formed and the bottom portion 22 for inserting the shaft 26 so as to be positioned in the center with a pair of lead wires 25 are separately injection- The magnet body 24 is formed by bonding the bottom surface portion 22 and the bottom surface portion 22 so that a common core 5 is provided on the shaft 26 and both ends thereof are respectively connected to the pair of lead wires 25 , And a normal diaphragm (8) is provided in the stepped groove (23).
    [5" claim-type="Currently amended] The method according to claim 3 or 4,
    The shaft 26 'diameter of length L of the upper shaft 31' 1, a 'diameter of length L of the second relationship between the lower shaft 32' configured as L "1 <L" 2 2 Monotype shaft (33 ' ).
    [6" claim-type="Currently amended] 6. The method of claim 5,
    The Double reduction shaft (33 ') has a relation with a diameter of length L 3 of the upper stage 30 diameter length L 1, the central stage (31) diameter length L 2, the lower end 32 of the L 1 <L 2 < communication buzzer, characterized in that the multi-stage-shaped shaft (33) constructed as L 3.
    [7" claim-type="Currently amended] The method according to claim 3 or 4,
    Characterized in that the portion of the shaft (26) embedded in the bottom surface portion (22) of the magnet body (24) is constituted by a conical shaft (34) .
    [8" claim-type="Currently amended] An upper shaft (31 '), the Double reduction shaft a Double reduction shaft (33') constructed as diameter length L '1, a' diameter of length L of the second relationship between the lower shaft (32) "L" 1 <L "2 (45 ') having the same diameter as the diameter L' 1 of the upper shaft 31 'of the lower shaft 32' and the diameter L ' 2 of the lower shaft 32' Is formed in the center of the bottom surface portion (22), and the two-stepped shaft (33 ') is inserted into the hole (45').
    [9" claim-type="Currently amended] 9. The method of claim 8,
    The lower end 32 constituting the multistage shaft 33 is a conical shaft 34 made of a conical buried portion 35 having an inverted triangular cross section and the lower end 32 of the bottom portion 22 constituting the magnet body 24 And a conical hole (36) is formed in the center so that the conical shaft (34) is fitted in the conical hole (36).
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    同族专利:
    公开号 | 公开日
    KR980013514A|1998-04-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-02-16|Priority to KR98-4624
    1998-02-16|Priority to KR1019980004624A
    1998-02-16|Priority to KR1019980004624
    1998-09-25|Application filed by 이수형
    1998-12-05|Publication of KR19980087860A
    1999-02-12|Priority claimed from AU25502/99A
    2001-03-15|Publication of KR100285190B1
    2001-03-15|Application granted
    优先权:
    申请号 | 申请日 | 专利标题
    KR98-4624|1998-02-16|
    KR1019980004624A|KR980013514A|1998-02-16|1998-02-16|A buzzer device for personal communication system|
    KR1019980004624|1998-02-16|
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