WO2002080335A1

WO2002080335A1 - Power feed mechanism

Info

Publication number: WO2002080335A1
Application number: PCT/JP2002/002934
Authority: WO
Inventors: Kinya Odagiri; Kouji Oki; Shingo Suzuki
Original assignee: Namiki Seimitsu Houseki Kabushiki Kaisha
Priority date: 2001-03-28
Filing date: 2002-03-26
Publication date: 2002-10-10
Also published as: JP2002291197A

Abstract

A power feed mechanism (60) comprises a motor board (61) which electrically connects a motor (stator (30), rotor (40)) in a housing (20) and a motor driving circuit board (80). The motor board comprises a motor driving board main section (61a) disposed in the bottom of the housing and a projecting section (61b) disposed on the side face of the housing by projecting out of the motor driving board main section, and a connection terminal (62) is disposed in the motor driving main section and a part of the projecting section. Therefore, even when terminals (spring terminals (71, 73) on the driving circuit board have a structure of contact with the side or bottom of the housing, it can easily be connected to the board connecting terminal to feed power to the motor.

Description

Description Power supply mechanism Technical field

The present invention relates to a power supply mechanism for a small electric motor. Background art

Conventionally, various power supply mechanisms have been proposed for electrically driving a small motor mounted on a driving circuit board or the like on a device housing. For example, a plurality of power supply terminals are protruded outward from the lower surface side of a housing for housing a rotor and a stator of a motor, a lead wire is soldered to an end of the power supply terminal, and the other end of the lead wire is connected to the other end. Known methods include soldering to a power supply pattern (land part) printed on a circuit board, and using a terminal socket instead of solder.

However, in the motor having the above-described structure, the position of the power supply terminal on the motor side is limited to some extent due to the layout of the lead wires in accordance with various power supply patterns (or socket portions) of the circuit board. It is difficult to apply one type of motor to a plurality of types of circuit boards having exceptionally different socket parts, and as a result, there is a problem in that a dedicated design is required and cost reduction is difficult. In addition, after soldering the lead wires, it is necessary to protect the connection portion with a UV-curable adhesive or the like, and it takes time and effort to connect the socket, which has reduced the workability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor power supply mechanism capable of coping with a plurality of types of socket-side specifications on various substrates in consideration of the above-described problems. Disclosure of the invention

In order to solve the above problems, a power supply mechanism of the present invention includes an electric mechanism (a stator and a rotor) housed in a housing, and a driving circuit for driving the electric mechanism. What is claimed is: 1. A power supply mechanism comprising: a motor substrate for electrically conducting connection with a substrate, wherein the motor substrate is disposed at a bottom of a housing so as to face a driving circuit substrate. A protruding portion that protrudes circumferentially from the motor substrate main body, is bent along the housing upright surface, and is disposed so as to cover at least a part of the upright surface. Further, the connection terminal portion is provided at least partially on the exposed surface side of the motor substrate body portion and at least partially on the exposed surface side of the protruding portion.

Further, according to the power supply mechanism of the present invention, the connection terminal portion is disposed so as to cover at least a part of the exposed surface of the motor substrate main body and at least a part of the exposed surface of the protruding portion. For example, a panel-like connection terminal (spring terminal) that is provided so as to protrude from the surface of the drive circuit board. When it has a structure that contacts the side surface of the housing, when it has a structure that contacts the bottom of the housing, or when it has a drive circuit. In any case where no connection terminal protruding from the drive circuit board is provided on the board side, power can be supplied to the motor side. In addition, this eliminates the need to adopt a motor terminal structure of a different design according to the connection terminal structure on the various driving circuit boards, thereby reducing costs.

Further, in the power supply mechanism of the present invention, the substrate body for the motor is formed in a substantially ring shape around the rotation axis of the motor in a plane orthogonal to the rotation axis Z of the motor. It is also possible to have a structure having a protruding portion extending outward in the circumferential direction, and a plurality of the protrusions being disposed at substantially equal angular intervals along the circumferential direction of the motor substrate body.

According to this power supply mechanism, the same effect as described above can be obtained, and the motor substrate main body is formed in a substantially ring shape, and the protruding portions are formed at substantially equal angular intervals along the circumferential direction of the motor substrate main body. By arranging a plurality of motors, the joint strength between the motor substrate and the housing can be increased, and stable electric power can be supplied to the motor.

Further, in the power supply mechanism, the electric motor substrate is a power supply mechanism composed of a flexible printed circuit board (FPC board), so that the flexibility of the board is improved. In addition, manufacturing costs can be reduced. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic longitudinal sectional view showing a vibration motor to which a power supply mechanism according to the present invention is applied.

FIG. 2 is an external plan view showing a structure of a vibration motor to which the power supply mechanism according to the present invention is applied.

FIG. 3 is an external side view showing a structure of a vibration motor to which the power supply mechanism according to the present invention is applied.

FIG. 4 is a plan view (A;) showing the rotor in the housing, and a bottom view (B) showing the structure of the lower part of the motor with the power supply mechanism removed.

FIG. 5 is a schematic plan view showing the shape and structure of the elastic member.

FIG. 6 is a plan view showing a substrate structure of the power supply mechanism.

FIG. 7 is a schematic longitudinal sectional view (shown in the first embodiment) showing a method of connecting a vibration motor and a circuit board to which the power supply mechanism according to the present invention is applied. FIG. FIG. 9 is a longitudinal sectional view (shown in the second embodiment) showing another connection method between the vibration motor and the circuit board to which the power supply mechanism according to the present invention is applied. FIG. 10 is a longitudinal sectional view (shown in the third embodiment) showing another connection method between the vibration motor and the circuit board that has been set.

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment]

Hereinafter, the power supply mechanism according to the present invention will be described with reference to FIGS. 1 to 9 in the case of a vibration motor for generating vibration at the time of silent calling of a mobile phone. Although the drawings are schematically illustrated to the extent that the present invention can be understood, the present invention is not limited to only the illustrated examples. Also, in the following description The vertical direction refers to the direction of the rotation axis of the motor (see Fig. 1), and the rotation direction of the rotor refers to the counterclockwise direction when the motor is viewed from above (see Fig. 5). . Further, the diagram shown in FIG. 1 schematically shows a cross section AA in FIG.

As shown in FIG. 1, the entire motor 10 is schematically composed of a housing 20, a stator 30, a rotor 40, an elastic member 50, etc., and a circuit board 80 (FIGS. See Fig. 9).

As shown in FIG. 2, the housing 20 houses a stator 30 and a rotor 40 (hereinafter, these are collectively referred to as an “electric mechanism”), and is a case member forming an outer shell of the motor 10. Yes, for example, a brass plate, a sus plate, or the like, which is formed in an approximately octagonal box shape with an open bottom (bottom).

The lower peripheral portion of the housing 20 is provided with four protruding portions 21 protruding outward (four directions), and as will be described in detail later, these protruding portions 21 are provided on the lower surface side (FIG. 5). ) And a part of the elastic member 50.

Further, the stator 30 includes a coil (sheet coil) 31 that is insert-molded on a plate-shaped flat substrate 31a shown in FIG. 1, a bearing 32, a pusher 33, and the like. Also, a plurality of coils 31 are arranged at substantially equal angular intervals in a circumferential direction around the rotation axis Z in a plane substrate 31a perpendicular to the rotation axis Z. At the periphery of the shaft center side, it is fitted and fixed to a bearing 32 described later. On the lower surface side of each coil 31, a washer 33 described later is attached by an adhesive member 34 such as an adhesive tape.

The bearing 32 is a member having a substantially cylindrical opening 32a centered on the rotation axis Z, and rotatably supports a later-described shaft 43 in the opening 32a. Further, as described above, the plurality of coils 31 are fitted and fixed at the side edge portion of the bearing 32 to the flat substrate 31a in which the coil 31 is inserted, and are integrated with the stator 30 side.

The washer 33 is a ring-shaped member made of a magnetic material such as iron. As described above, when the washer 33 is attached to the coil 31 constituting the stator 30, the magnet 42 is disposed below the coil 31 by the magnetic force of the magnet 42 disposed to face the coil 31. This has the effect of attracting the rotor 40 itself to the stator 30 side. The lower surface of the washer 33 is joined to a part of an elastic member 50 described later.

On the other hand, the rotor 40 includes a rotor yoke 41, a magnet 42, a shaft 43, a weight 44, and the like. The rotor yoke 41 is a plate having a substantially circular shape in plan view. The rotor yoke 41 is joined to the shaft 43 at the center thereof, and is rotatably supported by the bearing 32 via the shaft 43.

On the lower surface side of the rotor yoke 41, as shown in FIG. 1, a magnet 42 is located at a position facing the coil 31 at substantially equal angular intervals along a circumferential direction around the rotation axis Z. It is arranged in multiple. Further, a 锤 44 is attached to a part of the upper surface side of the rotor work 41.

As shown in FIG. 4 (A), the weight 44 is formed in a substantially semicircular shape so as to cover substantially half of the upper surface of the rotor yoke 41 (the right side shown in the figure), and is joined and fixed to the rotor yoke 41 on the lower surface side. I have. The outer peripheral edge of the rotor yoke 41 is bent upward corresponding to the shape of the weight 44, and the outer peripheral side surface of the magnet 42 abuts on this portion, so that the joining strength of the magnet 42 to the rotor yoke 41 is increased. Is increasing.

As described above, the weight 44 is attached to a part of the rotor yoke 41, and the center of gravity of the rotor yoke 41 is eccentric with respect to the rotation axis Z, so that the motor generates vibration when the rotor yoke 41 rotates.

The elastic member 50 is made of, for example, a material having elasticity such as stainless steel or a copper alloy, and is disposed between the outer case of the housing 20 and the electric motor to be housed, and supports the electric motor in a state separated from the housing 20. In addition, it is a member for absorbing vibration of the electric motor in the direction of the rotation axis z generated by the reciprocating movement of the rotor 40 in the direction of the rotation axis Z.

As shown in FIG. 5, the elastic member 50 includes a first joint portion 51, a second joint portion 52, and a connecting portion 53. Consists of a spence shape.

With the elastic member 50 having such a structure, the electric mechanism is joined only to the first joint 51 via the dasher 33, and the rotor 40 is rotated by the rotation axis Z of the electric motor generated by the rotation. Absorb the vibration of

As shown in FIG. 6, the power supply mechanism 60 electrically connects the electric mechanism housed inside the housing 20 and the circuit board 80 for driving the electric mechanism by using a motor board 61 having connection terminals 62. It is provided for electrically conducting connection. The motor substrate 61 is roughly composed of a motor substrate main body 61a and a protruding portion 61b, and is formed of, for example, a member having flexibility such as a flexible print substrate (FPC). The motor substrate main body 61 a is formed on the bottom of the housing 20 in a plane perpendicular to the rotation axis Z, with the rotation axis Z being the center, and at least a part thereof being substantially ring-shaped so as to overlap the second joint 52. It is formed in a shape. Therefore, the motor substrate main body 61a is disposed so as to face the circuit board 80 when the vibration motor 10 is mounted on the circuit board 80.

Also, the protrusions 61b extend outward from the motor substrate main body 61a and protrude therefrom, and are disposed at approximately 90-degree intervals in the circumferential direction of the motor substrate main body 61a. It is arranged to bend upward at the bottom edge portion of the housing 20 and cover a part of the side surface (standing side surface) of the housing 20 as shown in FIG. 3 (A).

The connection terminal 62 is a contact member for supplying power to the electric motor by joining to terminals (spring terminals 71 and 73 described later) of the power supply unit 70 on the circuit board 80 side, and is a conductive metal. Formed from material. The connection terminal 62 is disposed on the exposed surface side of the motor substrate main body 61a and the protruding portion 61b. That is, the connection terminal 62 is mounted on the bottom surface and the side surface of the main body of the vibration motor 10 in an exposed flat shape.

Further, an extension 62a is provided at a portion of the connection terminal 62 on the bottom surface side of the vibration motor 10. The extension portion 62a is a member provided to extend tangentially from a peripheral portion of the motor substrate main body 61a to which the connection terminal 62 is attached, and At the tip part formed in the shape, the wires are connected by solder or the like on the motor side (the four points of the M part shown in Fig. 3 (B)).

Next, a method for connecting the vibration motor 10 to the housing-side circuit board 80 will be described.

As shown in FIG. 7, the socket portion 70 of the circuit board 80 has a spring terminal 71 having an elasticity and an approximately L shape in a side view, and a resin case for fixing the spring terminal 71 to the circuit board 80 side. 72 is provided.

A part of the spring terminal 71 on the circuit board 80 side (connecting portion 71a) abuts on the surface of the circuit board 80, and its end is soldered to a power supply pattern (land portion, not shown) printed on the circuit board 80. Attached. The other part (the contact part 71 b) of the spring terminal 71 extends in the direction perpendicular to the circuit board 80, and its end is bent inward (to the side where the vibration motor 10 is mounted) in an arc shape. Contact the connection terminal 62 of the vibration motor 10.

As described above, when the contact portion 71 b of the spring terminal 71 is provided so as to stand vertically with respect to the circuit board 80, the vibration motor 10 connects the spring terminal 71 on the side surface of the housing 20. Contact while pushing in the radial direction. In other words, the spring terminal 71 comes into contact with the spring terminal 71 at the vertical portion of the housing 20 of the connection terminal 62 provided in the vibration motor 10. Here, the interval between the two spring terminals 71 disposed opposite to each other is determined in advance. It is adjusted to correspond to the outer diameter of the vibration motor 10. Accordingly, when the vibration motor 10 is in contact with the spring terminal 71, the vibration motor 10 is fixed by the spring terminal 71 and joined to the circuit board 80.

According to the power supply mechanism 60 shown in the present embodiment, as will be understood from the description of other embodiments described later, the vibration motor 10 is applied to a plurality of types of circuit boards 80 having different socket portions 70. it can. That is, the vibration motor 10 provided with the power supply mechanism 60 according to the present embodiment is, for example, a socket section 70 having a different form as shown in FIGS. The design cost can be reduced. In addition, the work of setting the vibration motor 10 and the socket portion 70 of the circuit board 80 is completed by pushing the vibration motor 10 into the socket portion 70 of the circuit board 80 and fitting the same, so that lead wires and the like can be obtained. The workability is greatly improved as compared with the case of joining by soldering, and automatic assembly becomes possible.

Further, the motor substrate main body 61a is formed in a substantially ring shape, and four connection terminals 62 are arranged at approximately 90-degree intervals along the circumferential direction of the motor substrate main body 61a, whereby the motor substrate 61a is formed. It is possible to increase the joint strength between the motor and the housing 20, and to supply electric power stably to the electric motor. Further, due to the repulsive force of the spring terminal 71, a force is applied from all sides of the vibration motor 10 toward the center, so that the vibration motor 10 can be stably held on the circuit board 80.

In the present embodiment, the shape of the motor substrate main body 61a is substantially ring-shaped. However, the present invention is not limited to this, and the design can be arbitrarily changed, such as a square or a polygon. Similarly, the position and shape of the protrusion 61b provided on the motor substrate main body 61a can be arbitrarily changed. Therefore, for example, the protrusion 61b may be provided so as to cover substantially the entire area of the upright side surface of the housing 20, and accordingly, the connection terminal 62 may be provided so as to cover substantially the entire area of the side surface of the housing 20. Further, the protrusion 61b and the connection terminal 62 may be provided so as to cover the upper surface of the housing 20.

Further, these coils 31 and the motor substrate main body 61a may be directly joined without disposing the elastic member 50 between the coil 31 (sheet coil) and the motor substrate main body 61a. May be resin-molded, and the integrated coil and the motor substrate main body 61a may be directly joined.

Further, in the present embodiment, the power supply mechanism 60 is applied to a so-called vibration motor that generates vibration by rotation of the rotor, but is not limited to this, and the rotor and the stator are arranged face-to-face. For example, if the motor has a structure that is open to the air, an opening hole for air supply and exhaust is provided in the housing, and a fan motor with a microphone opening in which the rotor section has an impeller-shaped fin, and a small motor with a brushless brush and a brush It can also be applied to general flat motors such as. [Second embodiment]

Hereinafter, in the present description, the same reference numerals are used for parts having the same configuration as the first embodiment. The difference from the first embodiment is the mounting structure of the socket 70 on the circuit board 80 side and the vibration motor 10. The vibration motor is different from the vibration motor 10 shown in the first embodiment. The same one shall be used.

In another embodiment of the present invention, as shown in FIG. 8, a part of the spring terminal 73 (the connection part 73a) is brought into contact with the surface of the circuit board 80, and the end is printed on the circuit board 80. Soldered to the pattern (land). Then, the other part of the spring terminal 73 (the contact part 73b) partially extends in the vertical direction with respect to the circuit board 80, and its end is bent inward, so that the parallel part along the surface of the circuit board 80 is formed. Extending in the direction. A projection 73c is provided at the tip of the contact portion 73b, and the projection 73c contacts the connection terminal 62 of the vibration motor 10.

Thus, when the contact portion 73b of the spring terminal 73 is provided substantially parallel to the circuit board 80, the vibration motor 10 contacts the spring terminal 73 on the bottom surface of the housing 20. In other words, power is supplied by contacting the projection 73c of the spring terminal 73 at the bottom surface of the housing 20 of the connection terminal 62 provided in the vibration motor 10.

Here, the vibration motor 10 shown in the present embodiment is fitted on its upper surface with a concave portion 90 provided in the housing of the mobile phone. Therefore, when the spring terminal 73 is in contact with the spring terminal 73, the spring terminal 73 is fixed while being sandwiched between the housing and the spring terminal 73, and is positioned on the circuit board 80 side.

According to the power supply mechanism 60 shown in the present embodiment, the joining operation of the vibration motor 10 and the socket portion 70 of the circuit board 80 is performed in a state where the vibration motor 10 is fitted and set in the recess 90 of the housing. Workability is improved because the lower surface of the vibration motor 10 is brought into contact with the socket portion 70 of the circuit board 80 so as to abut.

[Third embodiment] Similarly, in the following description, the same reference numerals are used for portions having the same configuration as that of the first embodiment. The difference from the first embodiment is the mounting structure of the socket section 70 on the circuit board 80 side and the vibration motor 10.The vibration motor is different from the vibration motor 10 shown in the first embodiment. The same one shall be used.

In the present embodiment, as shown in FIG. 9, the socket portion 70 on the circuit board 80 side does not protrude from the surface of the circuit board 80, that is, the connection terminal 62 of the vibration motor 10 and the circuit board 80. The power supply pattern (land part) printed on the surface is directly contacted.

In this case, the lower edge portion of the side surface of the vibration motor 10 is soldered in a state where the connection terminals 62 located on the lower surface side of the vibration motor 10 and the power supply pattern printed on the circuit board 80 are in contact with each other. This completes the joining work between the vibration motor 10 and the circuit board 80. In this case, a work step for positioning the circuit board 80 is required, but the workability is improved because soldering is performed by a solder reflow method as in the case of surface mounting electronic components.

According to the power supply mechanism 60 shown in the present embodiment, the joining operation between the power supply mechanism 60 on the vibration motor side and the circuit board 80 is performed by the lower part of the housing 20 side surface, that is, the vertical side surface exposed to the outside. And the work is facilitated because it is completed by soldering the bottom and the bottom at the same time. Also, instead of soldering the surface of the circuit board 80 to the lower surface of the vibration motor 10 as in normal surface mounting work, the surface of the circuit board 80 and the rising side of the vibration motor 10 are Soldering so as to surround it increases fixing strength. In other words, since the solder rises upward from the bottom of the vibration motor 10 and rises, the bonding area increases, and the solder fixing strength increases.

Accordingly, the solder not only connects the connection terminal 62 of the vibration motor 10 to the circuit board 80 but also restricts the movement of the vibration motor 10 in a direction along the surface of the circuit board 80, so that the vibration motor 10 It can be more firmly fixed by the substrate 80, and the vibration generated by the vibration motor 10 due to the rotation of the rotor 40 can be efficiently and reliably transmitted to the circuit substrate 80 side. As described above, for example, the power supply mechanism of the present invention can respond to all of the above three types of mounting embodiments, and the design specifications can be changed by various manufacturers, and the standard can be used regardless of the specifications. A power supply mechanism of a simple model can be provided. As described above, the terms and expressions used in the present specification are used merely for explanation, and do not limit the content of the present invention in any way. Even if limited terms and expressions are used, there is no intention to exclude equivalents or some of the embodiments of the present invention described above. Obviously, various modifications may be made within the scope of the claimed invention. Industrial applicability

As described above, according to the power supply mechanism of the present invention, the connection terminal covers at least a part of the exposed surface of the motor substrate main body and at least a part of the exposed surface of the protrusion. Since it is provided, it is provided so as to protrude from the surface of the drive circuit board, for example, when a panel-like connection terminal has a structure in contact with the side surface of the housing, when it has a structure in contact with the bottom of the housing, or In the case where the connection terminal protruding from the driving circuit board is not provided on the driving circuit board side, it is possible to supply power to the motor side in any of the following cases. In addition, this eliminates the need to use a motor of a different basic design for each connection structure on the drive circuit board side of each housing, and can reduce costs by using common components.

Also, the motor substrate main body is formed in a substantially ring shape, and a plurality of protruding portions are arranged at substantially equal angular intervals along the circumferential direction of the motor substrate main body, so that the motor substrate and the housing can be separated from each other. The joint strength can be increased, and stable power supply to the electric mechanism can be achieved.

Further, according to the power supply mechanism of the present invention, since the motor substrate is formed of a flexible print substrate (FPC substrate), it is not possible to form the motor in an assembling step. It is flexible, and is suitable for power supply components in terms of ease of installation when mounting and manufacturing costs.

Claims

The scope of the claims

1. A power supply mechanism including a motor board for electrically conducting connection between an electric mechanism stored in a housing and an external driving circuit board for driving the electric mechanism,

The motor substrate is provided at a bottom portion of the housing at a bottom portion of the housing, the motor substrate body portion being disposed to face the driving circuit board, and protruding circumferentially from the motor substrate body portion along the housing upright side surface. An extended protrusion that is bent and disposed so as to cover at least a part of the standing side surface,

A power supply mechanism, wherein a connection terminal portion is provided on at least a part of an exposed surface side of a motor substrate main body and at least a part of an exposed surface side of a protrusion.

2. The power supply mechanism according to claim 1, wherein

The motor substrate main body is formed in a substantially ring shape around the rotation axis of the motor in a plane orthogonal to the rotation axis of the motor,

A power supply mechanism, wherein a plurality of the protrusions are provided at substantially equal angular intervals along a circumferential direction of the motor substrate main body.

3. The power supply mechanism according to claim 1 or 2, wherein

The power supply mechanism, wherein the motor substrate is a flexible printed circuit board (FPC board).