JPH0537649Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a brush holder device, and in particular to an assembly structure of a circuit breaker, a terminal member, and a brush spring, and is applicable to, for example, a retractable brush holder mounted on an automobile. The present invention relates to a brush holder device that is effective for use in things such as headlight motors.

[Conventional technology]

Similar to general motors, retractable headlight motors are used to open and close headlights installed in automobiles.
A circuit breaker is connected, and this circuit breaker is preferably incorporated into the brush holder device.

Conventionally, when incorporating a circuit breaker into a brush holder device, the circuit breaker was assembled to a base made of an insulating resin substrate, fixed by caulking or bending, etc., and then a lead wire was attached to the terminal piece of the circuit breaker. Work is being carried out to electrically connect wires and pigtails by soldering, etc.

[Problem that the invention attempts to solve]

In a brush holder device in which a circuit breaker is assembled by such operations, the assembly operation cannot be performed from one direction and the operation is complicated, which tends to result in poor workability and difficulty in automating the process.

An object of the present invention is to provide a brush holder device that has good workability and can be easily automated.

[Means for solving problems]

The brush holder device according to the present invention includes a base integrally molded using resin, a circuit breaker fitted into a holding hole formed in the base, and a holding hole formed near the circuit breaker in the base. The present invention is characterized by comprising a terminal member that is fitted into the circuit breaker and has a protruding connection piece that contacts the terminal piece of the circuit breaker, and a brush spring that has one end supported by the terminal member.

[Effect]

According to the above-described means, the circuit breaker can be fixedly assembled to the base by fitting it into the holding hole of the base. Furthermore, by fitting the terminal member into the holding hole formed near the circuit breaker on the base, the circuit breaker and the connection piece of the terminal member can be brought into contact, thereby establishing an electrical connection between the two. can be easily secured.

〔Example〕

Fig. 1 is an exploded perspective view showing a brush holder device which is an embodiment of the present invention, Figs. 2 and 3 are a plan view and side view showing its assembled state, and Fig. 4 is a circuit breaker assembly section. FIG. 5 is an enlarged partial perspective view showing the lead wire connection portion, and FIG. 6 is a partially cutaway front view showing a retractable headlight motor in which the brush holder device is used.

In this embodiment, this brush holder device 10
is configured to be incorporated into the retractable headlight motor 1, and is fixedly assembled to the gear frame 3. This motor 1
is installed in the hood of an automobile with the motor housing 2 side facing upward.

This brush holder device 10 includes a base 11 integrally formed using an insulating resin by a suitable means such as injection molding, and the base 11 is housed inside the motor housing 2 and the gear frame 3. As shown in FIG. That is, the base 11 includes a main body 12 formed in an arcuate shape, and the base 11 is disposed parallel to each other and protrudes integrally from both ends (hereinafter referred to as front and rear ends) of the main body 12. A pair of arm portions 13a and 13b are provided.
A bridge 14 is installed between the other end portions (hereinafter referred to as the right end portion) of both arm portions 13a and 13b, and this bridge 14 serves to prevent deformation of the base 11 during resin molding. It is set.

A circuit breaker holding cylinder 15 is arranged on the main body part 12 of the base 11 so as to be closer to one arm part 13a side (hereinafter referred to as the front side) and protrudes vertically downward. 15 has a substantially rectangular cross-sectional shape, and is integrally formed into a rectangular tube shape with an open top and a closed bottom. The cylinder hollow part of this holding cylinder 15 is set to a size that allows a circuit breaker, which will be described later, to be inserted and held therein, so that it substantially constitutes a circuit breaker holding hole 16. There is.

A first terminal member holding portion 17 formed in a substantially columnar shape is disposed on the upper surface of the base body portion 12 so as to be closer to the front on the left side of the circuit breaker holding hole 16, and integrally projects vertically upward. A first terminal member holding hole 18 is arranged in the vertical direction in this holding part 17 and is opened so that the upper surface thereof is open. In this holding part 17, a substantially rectangular bar-shaped retaining piece 19 is disposed on the left side of the holding hole 18 and is formed to stand vertically. An engaging pawl 20 is provided to protrude inward from the holding hole 18.
In the holding part 17, a long and narrow vertical groove 21 is placed on the front side of the holding hole 18 and cut in the vertical direction, and on the right side of the vertical groove 21 there is a connection protruding from a first terminal member to be described later. Insertion groove 22 for inserting the piece
are arranged so as to penetrate in the left and right direction, and are cut in the vertical direction.

Further, on the upper surface of the base main body 12, a second terminal member holding portion 23 formed in a substantially columnar shape is disposed so as to approach the rear arm 13b and integrally protrudes vertically upward. , this holding part 23
A second terminal member holding hole 24 is vertically arranged in the second terminal member holding hole 24, and the upper surface thereof is open. In this holding part 23, a substantially rectangular rod-shaped retaining piece 25 is disposed on the left side of the holding hole 24 and is formed to stand vertically. The engaging claw 26 is connected to the holding hole 24
It protrudes inward. A vertical groove 27 is arranged in the holding part 23 at the rear side of the holding hole 24 and cut in the vertical direction.

On the right side of this holding part 23, a first lead wire guide tube 28 and a second lead wire guide tube 32 are arranged so as to be adjacent to each other on the left and right sides, and integrally protrude so as to extend in the vertical up and down direction. The lower ends of both cylinders are aligned with rubber grommets 4 fitted to the gear frame 3. The first lead wire guide tube 28 disposed on the right side has its lower end opening 29 facing the first lead wire insertion hole of the rubber grommet 4, and its upper end opening 30.
is vertical, and the circuit breaker holding hole 1
6, each facing the space above. The upper end opening 30 of the guide tube 28 has an inclined surface 31 formed into a concave curved surface having an appropriate curvature so as to gradually approach the circuit breaker holding hole 16 as it goes upward.

On the other hand, a lower end opening 33 is opened in the second lead wire guide tube 32 disposed on the left side so as to face the second lead wire insertion hole of the rubber grommet 4. An accommodating part 34 for accommodating a connecting piece protruding from a second terminal member, which will be described later, is formed at the upper end of the guide cylinder 32 so as to close the cylindrical end, and the bottom of this accommodating part 34 is A small hole 35 is formed in the wall so as to pass through it in the vertical direction through which a second lead wire, which will be described later, will protrude.

A pair of insulating walls 36 are provided on the outer edge of the upper surface of the base 11.
a and 36b are arranged from both the holding parts 17 and 23 to both the arm parts 13a and 13b, respectively, and are vertically erected in the shape of an arcuate thin plate having a constant height. A pair of stopper portions 37a, 37b are provided protruding from both arm portions 13a, 13b, respectively.
Both stopper portions 37a, 37b are configured so as to be able to abut brush springs, which will be described later, from the respective back sides. Temporary fixing claws 38a and 38b are provided on the inner sides of both stoppers 37a and 37b, respectively, and both temporary fixing claws 38a and 38b are configured to be able to hook the tips of the brush springs, respectively. . A pair of small holes 39a, 39b are formed in the right end portions of both arm portions 13a, 13b so as to penetrate in the vertical direction.
Screws a and 39b for screwing the base 11 onto the gear frame 3 are inserted through the screws a and 39b, respectively.

The circuit breaker 41 has a rectangular cross-sectional shape and a vertically elongated substantially rectangular parallelepiped shape, and a pair of terminal pieces 42a and 42b are arranged on both sides of the upper end surface of the circuit breaker 41 and protrude substantially vertically. There is.
Engagement recesses 43 are cut into both terminal pieces 42a and 42b, respectively.

The first terminal member 44 is integrally formed into a small approximately rectangular thin plate shape by press working using a conductive material such as brass, and is integrally formed with the base 11.
It is formed so that it can be fitted into the first holding hole 18 in . An engagement recess 45 is cut into a rectangular shape at the upper end of the terminal member 44, and a circuit breaker 41 is provided at the front side of the engagement recess 45.
A connecting piece 46 for connecting with the terminal piece 42a of
is bent at a substantially right angle and then integrally projects so as to hang downward. This connecting piece 46
An engaging recess 47 is cut in the shape of a dart hole opening downward.

The intermediate portion of the first terminal member 44 has a first
A brush spring 48 is disposed at right angles so as to protrude to one side, and is fixed at one end by suitable means such as caulking. The brush spring 48 is integrally formed into a substantially rectangular long thin plate shape by press working using a conductive leaf spring material, and is bent into a substantially hook shape with its ventral side facing the terminal member 44 side. The linear portion 4 of this brush spring 48
A substantially square brush mounting hole 50 is formed in the brush mounting hole 9 so as to pass through the brush mounting hole 50 in the thickness direction, and a pair of holding claws 51 are vertically symmetrically arranged and bent at the upper and lower positions of the brush mounting hole 50 . One of the brushes 53 is fitted into the brush attachment hole 50, and the brush 53 is held by the holding claws 51, 51 from above and below. A temporary fixing piece 52 is provided protruding from the brush spring 48 at the front end of the brush 53 so as to extend the linear portion 49 .

The second terminal member 54 is integrally molded using the same material and means as the first terminal member 44 so as to have a substantially symmetrical shape, and is formed so as to fit into the second holding hole 24 in the base 11. ing. This terminal member 54 also includes
An engaging recess 55 and a connecting piece 56 are provided, and the connecting piece 56 is bent at a substantially right angle and then further bent in the horizontal direction, and the lead wire insertion hole 57 is vertically bent. It is designed to pass through.

A second terminal is also provided in the middle part of this second terminal member 54.
A brush spring 58 is arranged and fixed at right angles so as to protrude to one side, and this brush spring 58 is bent into a roughly hook shape with its ventral side facing the terminal member 54 side so as to be symmetrical with the first brush spring 48. It is formed. The linear portion 59 of the brush spring 58 is also provided with a brush attachment hole 60, a pair of upper and lower holding claws 61, a brush 63, and a temporary fixing piece 62.

Next, the base 11, circuit breaker 41, and both terminal members 44,
The assembly work of No. 54 will be explained.

First, the circuit breaker 41 is inserted into the holding hole 16 of the base 11 from above with the terminal pieces 42a and 42b facing the upper left side.

Thereafter, the first terminal member 44 to which the first brush spring 48 is fixed is inserted into the first holding hole 18.
Then, the engagement recess 45 is turned upward, and the brush spring 48 is placed on the front side and inserted from above. As the terminal member 44 is inserted, the engagement claw 20 of the retaining piece 19 is inserted into the engagement recess 4.
5, the terminal member 44 is held down from above by the stopper piece 19 to prevent it from coming off.

At the same time, the connecting piece 46 integrally protruding from the terminal member 44 connects the first terminal piece 42 of the circuit breaker 41 fitted into the holding hole 16.
a, the recesses 47 and 43 of both will come into contact with each other from above so as to engage with each other. As a result, the circuit breaker 41 is connected to the first terminal member 44.
It is pressed down from above by the holder and held in place.

On the other hand, the second terminal member 54 to which the second brush spring 58 is fixed is attached to the second holding hole 24.
Then, the engagement recess 55 is turned upward, and the second brush spring 58 is placed on the rear side and inserted from above. As the terminal member 54 is inserted, the engaging claw 26 of the retaining piece 25 engages with the engaging recess 55, so that the terminal member 54 is held down from above by the retaining piece 25. That will happen.

At the same time, the connection piece 56 integrally protruding from the second terminal member 54 comes to be housed in the accommodation part 34 formed on the second lead wire guide tube 32, and in this state, the connection piece 56 is The small hole 57 of the piece 56 and the small hole 35 of the housing part 34 are aligned.

In this way, the base 11, on which the circuit breaker, both terminal members and brush springs are assembled, is assembled at a predetermined location on the gear frame 3 and fixed with screws or the like.

Next, the first and second lead wires 64 and 6
5 is inserted into the rubber grommet 4 of the gear frame 3 from below, and into the first and second lead wire guide tubes 28 and 32 protruding from the base 11 through their lower end openings 29 and 33, respectively. The inserted lead wires 64, 65 are guided by the inner peripheral surfaces of the guide tubes 28, 32 and are smoothly inserted.

The first lead wire 64 inserted into the first guide tube 28
When the first lead wire 64 reaches the upper end, it is guided along the inclined surface part 31, so that the tip of the first lead wire 64 is vertical and protrudes from the upper end opening 30 facing toward the circuit breaker 41. Thereafter, it is inserted into the recess 43 in the remaining terminal piece 42b of the circuit breaker 41.

On the other hand, when the second lead wire 65 inserted through the second guide tube 32 reaches the upper end, it is inserted through the small hole 35 opened at the bottom of the accommodating portion 34 and the second terminal aligned there. It will be inserted into the small hole 57 of the connecting piece 56 in the member 54.

In this way, all of the electrical connection points in this brush holder device 10 inevitably come into contact with each other as the assembly work progresses. That is, one terminal piece 42a on the circuit breaker 41 is in contact with the connection piece 46 of the first terminal member 44, the other terminal piece 42b is in contact with the first lead wire 64, and the other terminal piece 42b is in contact with the first lead wire 64. The electrical system of this brush holder device is soldered by soldering each of the connecting pieces 56 of the second terminal member 54 that are in contact with the second lead wire 65 on the accommodation portion 34 of the second guide tube 32. will be coordinated. Since all of the points required for soldering are oriented upward, the soldering work thereon can be carried out easily or by automation.

Thereafter, a commutator 6 which is integrally fixed to the rotor 5 of the motor is placed between the brushes 53 and 63 at the tips of a pair of brush springs 48 and 58 whose one ends are indirectly supported by the base 11, respectively. By inserting the rotor 5, one end of the rotor 5 is rotatably supported by the gear frame 3, and then the motor housing 2 is placed on the gear frame 3 and fixed with screws or the like.

Here, if both brush springs 48, 58 are in a free state and closed, both brush springs 48, 58 and brushes 53, 63 will interfere with commutator 6, motor rotor 5, etc.
The assembling work of the motor rotor 5 mentioned above is obstructed,
This reduces work efficiency and makes it difficult to automate the work.

Therefore, in this embodiment, temporary fixing pieces 52 and 62 protruding from the tips of both brush springs 48 and 58, respectively, are attached to both arm parts 1 of base 11.
Temporary fixing claw parts 38a, 3 protruding from 3a, 13b
8b, respectively. Due to this engagement, both brush springs 48, 58 are maintained in the expanded state, and therefore, the assembly work of the motor rotor 5 is hindered by interference between the brush springs 48, 58 and the brushes 53, 63. It can be easily carried out without any trouble.

In addition, if a radially outward pushing force is inadvertently applied to the brush spring in each of the above-mentioned processes, and the brush spring is excessively deformed beyond its elastic limit, the preset The contact pressure on the commutator will vary.

Therefore, in this embodiment, both temporary hook portions 3
Stopper parts 37a, 37b are provided on the outside of 8a, 38b.
By protruding from each brush spring 48, 58, fluctuations in the contact pressure at the brush springs 48, 58 are prevented. That is, even if a radially outward pushing force is accidentally applied to the brush springs 48 and 58, both brush springs 4
Parts of 8 and 58 are stopper portions 37a and 37b.
Since further outward deformation is prevented by contacting with, the elastic limit is not exceeded and excessive deformation occurs, thus ensuring the required contact pressure.

According to the embodiment described above, the following effects can be obtained.

(1) After fitting the circuit breaker into the holding hole of the base, by fitting the terminal member into the base holding hole, the connecting piece of the terminal member can be brought into contact with the terminal piece of the circuit breaker, and Since the circuit breaker can be fixed in a state where it cannot be removed by the terminal member, and since these fitting operations are done from one direction, it is difficult to fix the circuit breaker and make electrical contact. Work can be streamlined.

(2) By inserting the first lead wire through the guide tube, the tip of the first lead wire can be guided and brought into contact with the terminal piece of the circuit breaker as desired, so the wiring for this lead wire Work can be simplified.

(3) By inserting the second lead wire through the guide tube, the tip of the second lead wire can be guided and brought into contact with the connecting piece of the second terminal member as desired, so Wiring work can be simplified.

(4) By inserting the first and second lead wires into the guide tubes, it is possible to prevent the lead wires from floating, so correction work after soldering can be omitted, and the lead wires can be It is possible to prevent occurrence of jamming and the like due to free movement.

(5) Since all of the electrical connection points are arranged on the base, it becomes easier to carry out the soldering work for them, and it is possible to improve work efficiency and realize automation.

(6) By temporarily locking the brush spring with the temporary locking claws protruding from the base, the expanded state of the brush spring can be maintained. Also, interference with the brush can be avoided, and workability can be improved.

(7) By protruding the stopper part on the base,
Since excessive deformation of the brush spring can be prevented, the contact pressure of the brush spring can be maintained normally.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified without departing from the gist thereof.
It goes without saying that various changes are possible.

For example, the shape, structure, size, materials used, arrangement, etc. of the base, circuit breaker, terminal member, brush spring, and lead wire are not limited to those in the above embodiments.

In the above embodiment, the case where the present invention is applied to a brush holder device used in a retractable headlight motor has been described, but the present invention can be applied to all brush holder devices used in other motors.

[Effect of idea]

As explained above, according to the present invention, the circuit breaker is fixedly assembled by fitting it into the holding hole of the base, and the terminal member is inserted into the holding hole formed near the circuit breaker of the base. Since the circuit breaker and the connecting piece of the terminal member can be brought into contact with each other by the fitting operation, the workability regarding the circuit breaker can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing a brush holder device which is an embodiment of the present invention, Figs. 2 and 3 are a plan view and side view showing its assembled state, and Fig. 4 is a circuit breaker assembly section. FIG. 5 is an enlarged partial perspective view showing the lead wire connection portion, and FIG. 6 is a partially cutaway front view showing a retractable headlight motor in which the brush holder device is used. DESCRIPTION OF SYMBOLS 1... Motor for retractable headlight, 2... Motor housing, 3... Gear frame, 4... Rubber grommet, 5... Motor rotor, 6... Commutator, 10... Brush holder device, 11... Base, 12... ...Base main body, 13a, 13b...Arm part, 14...Bridge, 15...Circuit breaker holding cylinder, 16
... Circuit breaker holding hole, 17 ... First terminal member holding part, 18 ... First terminal member holding hole, 19 ... Retaining piece, 20 ... Engaging claw, 21 ... Vertical groove, 22 ...Insertion groove, 23...Second terminal member holding portion, 24...Second terminal member holding hole, 25...Removal prevention piece, 26...
Engagement claw, 27... Vertical groove, 28... First lead wire guide tube, 29... Lower end opening, 30... Upper end opening, 31... Inclined surface portion, 32... Second lead wire guide tube, 33...Lower end opening, 34...Accommodating part, 3
5...Small hole, 36a, 36b...Insulating wall, 37
a, 37b... Stopper part, 38a, 38b...
Temporary fixing claw portion, 39a, 39b...Small hole, 41...
Circuit breaker, 42a, 42b...Terminal piece, 43...Engagement recess, 44...First terminal member, 45...Engagement recess, 46...Connection piece, 4
7... Engagement recess, 48... First brush spring, 49... Straight line portion, 50... Brush mounting hole, 51... Holding claw, 52... Temporary fixing piece, 53
... Brush, 54 ... Second terminal member, 55
...Engagement recess, 56... Connection piece, 57... Small hole, 58... Second brush spring, 59... Straight line portion, 60... Brush mounting hole, 61... Holding claw, 62... Temporary fixing piece, 63...Brush, 64
...First lead wire, 65...Second lead wire.

Claims (1)

[Scope of utility model registration request] The circuit breaker consists of a base integrally molded using resin, a circuit breaker fitted into a holding hole formed in the base, and a circuit breaker fitted into a holding hole formed near the circuit breaker of the base. 1. A brush holder device comprising: a terminal member having a protruding connection piece that contacts the terminal piece; and a brush spring having one end supported by the terminal member.