JP3049646U - motor - Google Patents

Abstract

(57) [Summary] [Purpose] It has a lead unit integrated with the brush for convenience of manufacture and handling. This lead unit is freely deformable and versatile. The circuit unit is provided with a motor that is difficult to transmit directly. A pair of brushes (13, 13) whose free end is pressed against a commutator (23) is arranged inside a lid plate (12) fitted to one end of a motor case (11). The lid (12) is provided with a pair of conductive coil springs (14, 14) having one end connected to each brush (13) and the other end protruding outside the lid (12). .

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a motor, and more particularly to an ultra-small-diameter motor used as a vibration source for a purpose of use, such as a purpose of notifying an incoming call of a mobile phone by vibration, in which a lead portion to a brush is improved. is there.

Conventionally, as a typical example of a lead portion for energizing a brush of a motor, as shown in FIG. 4, one end of each of brushes 13, 13 penetrates out of a cover plate 12, , 13 are soldered to the lead wires 14b, 14b with solders 16, 16, respectively.

However, the method of soldering the lead wires 14b, 14b not only complicates the soldering operation when the diameter of the motor becomes small, but also causes a short circuit (electrical There is a danger of short-circuiting (hereinafter simply referred to as short-circuiting). (Especially, the risk of short-circuiting increases if the motor vibrates.) There is a problem that the necessity of mounting the 15, 15 is required.

Therefore, recently, as shown in FIG. 5, one end protruding portion of the brush from the cover plate 12 is extended, and the brush-integrated lead plates 13b, 13b (in FIG. The lead plate 13b is not shown because it is located on the back side of the figure.) The brush-integrated lead plates 13b, 13b are adapted so that the tips of the brush-integrated lead plates 13b, 13b conform to a predetermined position of the printed circuit board P when the motor 10 is fixed to a fixed place with a fixture 17 or the like. Thus, the tips of the brush-integrated lead plates 13b, 13b can be soldered directly to the circuit portion PC on the printed circuit board P with the solder 16a.

Therefore, the above-mentioned brush-integrated lead plates 13b, 13b have an advantage that manufacture and assembly are easy. However, in this conventional example, in order to fix the motor at a predetermined position and wire the ends of the brush-integrated lead plates 13b, 13b to the printed circuit board P or the like, each circuit (each device using the motor) has The shape of the brush-integrated lead plates 13b and 13b must be individually set, and there is a problem that versatility is low.

In addition, the brush-integrated lead plates 13b, 13b have a problem in that the vibration of the motor 10 is transmitted to the soldered portions at the tips of the brush-integrated lead plates 13b, 13b, so that the wiring may be damaged due to the vibration. Have.

[0007]

[Problems to be solved by the invention]

 Therefore, the present invention has been made to solve the above problems, and has a lead unit integrated with the brush for convenience of manufacture and handling, and this lead unit is freely deformable and versatile. Another object of the present invention is to provide a motor which is difficult to directly transmit the vibration of the motor to the circuit section.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the configuration of the present invention is such that a pair of brushes 13, 13, whose free ends are pressed against a commutator 23, are arranged inside a cover plate 12 fitted to one end of a motor case 11. The cover plate 12 is provided with a pair of conductive coil springs 14, 14 having one end connected to each brush 13 and the other end protruding outside the cover plate 12. It is.

Therefore, in the motor of the present invention, since the conductive coil springs 14, 14 are conventional lead wires, the conductive coil springs 14, 14 can be freely bent and the motor vibrates. Even so, the vibration acts so as not to be directly transmitted to the distal end sides of the conductive coil spring bodies 14.

Next, in the invention of “Claim 2”, a pair of brushes 13, 13 whose free end sides are pressed against the commutator 23 are provided inside the cover plate 12 fitted to one end side of the motor case 11. A foot 13a protruding from an intermediate portion of each of the brushes 13 is buried in the cover plate 12 and one end of the cover plate 12 is connected to the foot 13a of each brush 13. The free end means a technical means comprising a pair of conductive coil springs 14, 14 connected to the opposite side and having the other end protruding outside the cover plate 12.

Therefore, in the present invention, in addition to the function of the first aspect, each brush 13 has a function of being held on the lid plate 12 by the foot 13a.

In the present invention, since the conductive coil springs 14 and 14 are connected to a portion of the brush 13 opposite to the free end side of the foot portion 13a, the brush 13 and the conductive coil spring 14 are connected to each other. The conductive coil springs 14 and 14 act on the connecting portion with the vibrator 23 so as not to apply a vibration force due to frictional vibration with the commutator 23.

Next, in the invention of claim 3, a pair of brushes 13, 13, whose free ends are pressed against the commutator 23, are provided inside the cover plate 12 fitted to one end of the motor case 11. The lid 12 is provided with a pair of conductive coil springs 14, one end of which is connected to each brush 13 and the other end protrudes outside the lid 12. The outer surface is provided with a technical means in which a heat-fusible insulating layer 14a is respectively coated.

Therefore, in the motor according to the present invention, in addition to the function of claim 1, the outer surface of the conductive coil spring bodies 14, 14 is coated with the heat-fusible insulating layer 14 a. , 14 are shaken by vibration or the like even if the total length is long, so that a short circuit can be prevented even if they contact each other.

By setting the heat-fusible insulating layer 14a so that it can be melted by the heat of soldering, mechanical and electrical connections can be made at the soldered portion ignoring the heat-fusible insulating layer 14a. It has an action that can be performed.

Next, according to a fourth aspect of the present invention, a pair of brushes 13, 13 having their free ends pressed against the commutator 23 are provided inside the cover plate 12 fitted to one end of the motor case 11. A foot 13a protruding from an intermediate portion of each of the brushes 13 is buried in the cover plate 12 and one end of the cover plate 12 is connected to the foot 13a of each brush 13. The free end side is connected to the opposite side, and a pair of conductive coil springs 14, 14 is provided at the other end, which protrudes outside the cover plate 12. The outer surfaces of the conductive coil springs 14, 14 The technical means for covering the heat-meltable insulating layers 14a are employed.

Therefore, the motor according to the present invention exhibits both the effects of “claim 2” and “claim 3”.

[0018]

[Embodiment of the invention]

 Next, embodiments of the present invention will be described in detail. In the figure, reference numeral 10 denotes a motor. The motor 10 has a permanent magnet 21 attached to an inner peripheral surface of a motor case 11 having an end surface 11a at one end (the right end in FIG. 1), and a motor shaft 22 and a commutator inside. 23 is accommodated. A cover plate 12 is attached to the other end of the motor case 11, bearings 25a and 25b are attached to the cover plate 12 and the end surface 11a, and the motor shaft 22 is attached to the motor case 22 by the two bearings 25a and 25b. 11 is rotatably supported in alignment with the central axis of the conventional art.

The lid plate 12 is molded of an insulating synthetic resin, and has a lid portion 12 a having an outer diameter corresponding to the outer diameter of the motor case 11, and the inner diameter of the motor case 11. When the cylindrical portion 12b is fitted into the motor case 11, the edge of the lid 12a protrudes in a flange shape from the cylindrical portion 12b and abuts against the end face of the motor case 11. It is made to do.

The lid 12a is provided with cutouts 12c, 12c on the outer surface (left side in FIG. 1), and a local portion of the motor case 11 is bent in the cutouts 12c, 12c. The cover plate 12 is fixed to the motor case 11 by being bent as 11b.

Then, a pair of brushes 13, 13 of which the free end side is pressed against the commutator 23, is disposed inside the cover plate 12 fitted to one end side of the motor case 11, which is the same as the conventional one. . The brushes 13, 13 are made of a springy metal plate, and their free ends are pressed against the peripheral surface of the commutator 23 by a spring force, as in the conventional case.

In the present invention, the lid 12 is provided with a pair of conductive coil springs 14, 14 having one end connected to each brush 13 and the other end protruding outside the lid 12. These conductive coil springs 14 and 14 replace the conventional lead wires. A power source is connected to the other ends (the left end in FIG. 1) of the conductive coil springs 14 and 14 and the conductive coil springs 14 and 14 are connected to each other. Electric power is supplied to an exciting coil (not shown) wound around the commutator 23 to the rotor 24 through the brushes 14 and 14 and the brushes 13.

As the brush 13, a conventionally known brush may be used. In the illustrated example, as shown most clearly in FIG. 3, a metal flat plate having a spring property (a free end side and a commutator 23 are formed). A metal may be separately laminated by a suitable means such as a clad or the like in order to secure electrical conductivity and abrasion resistance on the contact surface portion).

The brush 13 has a base end on the inner surface side of the cover plate 12 such that the base end cannot be displaced (the free end side is pressed against the commutator 23 by its spring property, and the contact portion to the commutator 23 is This is fixedly provided (displaceable in the diameter direction of the element 23), and this fixing method may be performed by a conventionally known method.

In the case of a relatively large motor, the brush 13 is fixed to the cover plate 12 with screws or rivets, but in the illustrated case, the outer diameter of the motor case 11 is as small as 8 mm or less. A foot 13a protruding from a part of each of the brushes 13 (an intermediate portion of the brush 13) is embedded and fixed in the cover plate 12. That is, the foot portion 13a shown in FIG. 3 is pressed into a groove or a hole (not shown) provided in the cover plate 12 and fixed thereto, or the foot portion 13a is formed at the time of molding the cover plate 12 made of synthetic resin. The foot 13a may be embedded therein.

The conductive coil spring bodies 14 are formed by winding a metal wire having conductivity and spring properties in a coil shape.

The conductive coil springs 14 and 14 have a certain degree of elasticity and can be bent in any direction. , 14 can be connected to a circuit at an appropriate position such as a printed circuit board. When the conductive coil springs 14 and 14 are wired in a slightly extended state, the rigidity is increased due to the characteristics of the coil, so that contact between the conductive coil springs 14 and 14 can be prevented.

The conductive coil spring body 14 and the brush 13 may be electrically connected by simply contacting each other when both are fixed, but may be a conventionally known method such as soldering or welding. It is convenient for assembling work that it can be fixed as a single part so that it can be handled as an integral part.

In order to allow the conductive coil springs 14, 14 to protrude from the inside to the outside of the cover plate 12, a through hole is provided in the cover plate 12, and the conductive coil spring body 14 is inserted through the through hole. However, when the cover plate 12 made of synthetic resin is formed, the intermediate portion of the coil spring bodies 14 may be formed so as to be embedded in the cover plate 12.

Next, in the invention of “Claim 2”, a pair of brushes 13, 13, whose free ends are pressed against the commutator 23, are provided inside the lid plate 12 fitted to one end of the motor case 11. Foot portions 13a protruding from respective intermediate portions of the brushes 13, 13 are embedded in the cover plate 12 and arranged.

That is, the fixing of the brush 13 to the cover plate 12 is performed by embedding the foot portion 13 a in the cover plate 12 as described above, and the brushes 13, 13 can be connected to the cover plate 12 even with a small-diameter motor. It can be easily fixed to

The lid 12 has one end connected to a portion of the brush 13 opposite to the free end side of the foot portion 13 a, and the other end protruding outside the lid 12. The conductive coil springs 14 are provided.

The connection of the conductive coil spring body 14 to the brush 13 is limited to a part of the brush 13 opposite to the free end side of the foot portion 13a because the free end side of the conductive coil spring body 14 is Since the vibration is caused by the rotation of the motor, it is connected to a portion on the opposite side of the foot portion 13a, which is a fixed portion, where there is no vibration, thereby preventing the occurrence of poor electrical contact between the two connection portions.

Next, according to the invention of claim 3, a pair of brushes 13, 13, whose free ends are pressed against the commutator 23, are arranged inside a lid plate 12 fitted to one end of the motor case 11. This is the same as before.

According to the present invention, the lid 12 is provided with a pair of conductive coil springs 14, 14 having one end connected to each brush 13 and the other end protruding outside the lid 12. The outer surfaces of the coil spring bodies 14 are covered with a heat-meltable insulating layer 14a, respectively.

That is, in the present invention, in addition to the configuration of the present invention, the outer surfaces of the conductive coil spring bodies 14 and 14 are coated with the heat-meltable insulating layers 14a, respectively. The heat-fusible insulating layer 14a can be made of a synthetic resin as appropriate, and generally keeps the insulating property by coating a material that melts at a temperature of about 200 ° C. or more thinly. Thus, the heat-meltable insulating layer 14a, which is a film, is melted, and electrical connection can be performed by ordinary soldering.

Next, according to the invention of claim 4, a pair of brushes 13, 13, whose free ends are pressed against the commutator 23, are provided inside the cover plate 12 fitted to one end of the motor case 11. The feet 13a projecting from the respective intermediate portions of the brushes 13, 13 are embedded in the cover plate 12 and arranged. This configuration is the same as in claim 2.

One end of the cover plate 12 is connected to a portion of each brush 13 opposite to the free end side of the foot portion 13 a, and the other end of the brush 13 is formed of a pair of conductive members protruding outside the cover plate 12. Coil spring bodies 14, 14 are provided. This configuration is the same as that of the "claim 2".

The outer surfaces of the conductive coil spring bodies 14, 14 are coated with a heat-meltable insulating layer 14a, respectively. This configuration is the same as in claim 3.

[0040]

[Effect of the invention]

 Therefore, the present invention can provide a motor in which the conductive coil spring bodies 14, 14 can be replaced with conventional lead wires, and the tip of the conductive coil spring bodies 14, 14 can be bent to a desired position and wired. It is.

When the conductive coil springs 14 are used, even if the motor is vibrated, the vibration is hardly transmitted to the ends of the conductive coil springs 14, 14. Since the conductive coil springs 14 and 14 themselves have elasticity and rigidity, even if the gap between the conductive coil springs 14 and 14 is small, there is a possibility that the conductive coil springs 14 and 14 may be short-circuited by contact. It can provide a small number of motors.

In the present invention, only the conductive coil springs 14, 14 protrude outside the cover plate 12, so that the conductive coil springs 14, 14 shown in FIG. The insulating covers 15 used in the conventional example become unnecessary.

According to the invention of claim 2, the brushes 13, 13 are arranged such that the foot portions 13 a protruding from respective intermediate portions of the brushes 13, 13 are embedded in the cover plate 12. In addition, since the conductive coil spring body 14 is connected to a portion of the brush 13 opposite to the free end side from the foot portion 13a, in addition to the above-described effects, the connecting portion between the brush 13 and the conductive coil spring body 14 is vibrated. Thus, it is possible to provide a motor that is hardly electrically disconnected by the above-described method.

According to the invention of claim 3, in addition to the effect of claim 1, since the outer surfaces of the conductive coil spring bodies 14, 14 are coated with the heat-fusible insulating layers 14 a, respectively. Thus, it is possible to provide a motor that can prevent a short circuit accident.

Further, the invention of claim 4 can provide a motor having all the above effects.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a city embodiment of the present invention.

FIG. 2 is an enlarged plan view of an inner surface side of a lid board.

FIG. 3 is an enlarged perspective view of a brush used in the present invention.

FIG. 4 is an enlarged sectional view of a conductive coil spring used in the present invention.

FIG. 5 is a partial cross-sectional front view of a conventional example.

FIG. 6 is a partial cross-sectional front view of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Motor case 12 Lid 13 Brush 13a Foot 23 Commutator 14 Conductive coil spring body 14a Heat-fusible insulating layer

Claims (4)

[Utility model registration claims] 1. A pair of brushes (13, 13) having a free end pressed against a commutator (23) is arranged inside a lid plate (12) fitted to one end of a motor case (11). A motor provided with a pair of conductive coil springs (14, 14) having one end connected to each brush (13) and the other end protruding outside the lid (12). 2. A pair of brushes (13, 13) having their free ends pressed against a commutator (23) inside a cover plate (12) fitted to one end of a motor case (11). (1
(13) The feet (13) projecting from the respective intermediate portions
a) is embedded in the lid board (12) and arranged, and one end of the lid board (12) is located at a position opposite to the free end side of the foot (13a) of each brush (13). A motor having a pair of conductive coil springs (14, 14) connected to each other and having the other end protruding outside the lid (12). 3. A pair of brushes (13, 13) having a free end pressed against a commutator (23) inside a cover plate (12) fitted to one end of a motor case (11), The lid (12) is provided with a pair of conductive coil springs (14, 14) having one end connected to each brush (13) and the other end protruding outside the lid (12). The heat-fusible insulating layer (14) is provided on the outer surface of the coil spring body (14, 14).
Motors each coated with a). 4. A pair of brushes (13, 13) having their free ends pressed against a commutator (23) inside a cover plate (12) fitted to one end of a motor case (11). (1
(13) The feet (13) projecting from the respective intermediate portions
a) is embedded in the lid board (12) and arranged, and one end of the lid board (12) is located at a position opposite to the free end side of the foot (13a) of each brush (13). A pair of conductive coil springs (14, 14) connected to each other and having the other end protruding outside the lid plate (12), and an outer surface of the conductive coil springs (14, 14) is heated and melted insulated. Layer (14
Motors each coated with a).