JPH0649081Y2 - Brush holder device - Google Patents

Description

The present invention relates to a brush holder device, and more particularly to a structure for mounting a circuit breaker on a base and a structure for electrically connecting a circuit breaker and a brush. The present invention relates to a brush holder device effectively used for a motor used for driving an electric component mounted on an automobile.

[Conventional technology]

Similar to a general motor, a circuit breaker is connected to a motor for driving electric components installed in an automobile, and it is desirable that the circuit breaker be incorporated in a brush holder device.

Conventionally, as a brush holder device incorporating a circuit breaker, there is one as shown in FIGS. 6 and 7. That is, in FIG. 6 and FIG.
The circuit breaker 1 is provided with a pair of terminal pieces 2 projecting therefrom, and the terminal pieces 2 are each provided with an engagement hole 3. On the other hand, the base 4 in the brush holder device
A pair of terminal piece insertion holes 5 are formed in the circuit breaker 1 so as to correspond to the terminal portion pieces 2 of the circuit breaker 1. A faston terminal piece 8 is caulked to the other end of a pigtail 7 of which one end is planted in the brush 6, and an engaging boss 9 is provided on the terminal piece 8. The terminal portion piece 2 of the circuit breaker 1 is inserted into the insertion hole 5 from the lower surface side of the base 4, and the faston terminal portion piece 8 is fitted into the insertion end portion from the upper surface side of the base 4. In this state, the faston terminal piece 8 fitted to the terminal piece 2 of the circuit breaker 1 and the end face of the circuit breaker 1 sandwich the base 4, so that the circuit breaker 1 is relatively held by the base 4. Will be.

[Problems to be solved by the device]

However, in such a brush holder device, both the terminal piece 2 and the faston terminal piece 8 of the circuit breaker 1 are standardized parts, so that the base 4, which is a plate material, has both sides 2, 8 on both sides. As shown in FIG. 7, when the boss 9 of the faston terminal piece 8 does not engage with the engagement hole 3 of the circuit breaker terminal piece 2 in the state of being sandwiched from the base 4, as shown in FIG. The holding power of the circuit breaker 1 against will be weakened.

Therefore, in order to connect the circuit breaker 1 to the base 4 with certainty, soldering may be performed between the faston terminal piece 8 and the terminal piece 2, but the number of steps is unavoidable.

An object of the present invention is to provide a brush holder device that can reliably connect a circuit breaker to a base.

[Means for Solving the Problems]

In the brush holder device according to the present invention, the circuit breaker is assembled to the base provided with the brush holder part, and the faston terminal part piece having the engaging convex part is fitted to the terminal part piece having the engaging hole of the circuit breaker. In the brush holder device configured as described above, a circuit breaker holding cylinder (31) into which the circuit breaker (34) can be inserted in the base (21) is a cylinder whose one end face is closed and the other end face is open. The circuit breaker holding cylinder (31) is formed in a shape, and a holding rib (32) for pressing and holding the circuit breaker (34) housed in the cylinder is provided on the inner circumferential surface of the circuit breaker holding cylinder (31). The circuit breaker holding cylinder (31) has a closed wall with a through hole (33) larger than the Faston terminal piece (28). Breakers (34) the circuit breaker holding tube in a state of being held by being inserted into (31) and the retaining rib (32), the circuit breaker (34)
Terminal parts (35a, 35b) of the circuit breaker (34) are inserted into the through holes (33). Further, the faston terminal parts (28) are connected to the circuit breaker (34) in the terminal parts (35a, 35b). ) Is fitted into the end face of the (4) end face, and the engaging convex portion (30) of the faston terminal piece (28) and the engaging hole (36) of the terminal piece (35a, 35b). And are engaged.

[Action]

According to the above-mentioned means, since the through hole formed in the circuit breaker holding portion of the base is larger than the faston terminal piece, when the faston terminal piece is fitted to the circuit breaker terminal piece. , The Faston terminal piece hits the end face of the circuit breaker. As a result, the engaging convex portion projectingly provided on the faston terminal piece is properly engaged with the engaging hole formed on the terminal piece of the circuit breaker, so that the faston terminal is securely attached to the terminal piece of the circuit breaker. Will be retained.

〔Example〕

FIG. 1 is an exploded perspective view showing a main part of a brush holder device according to an embodiment of the present invention, and FIGS. 2 and 3 are front sectional views and side sectional views showing the assembled state of the main part, and FIG. Is an enlarged partial bottom view showing the circuit breaker built-in portion, and FIG. 5 is a partially cut front view showing a motor in which the brush holder device is used.

In the present embodiment, the brush holder device 20 is constructed so as to be incorporated into the motor 11 for driving the automobile electrical components, and is fixedly assembled to the gear frame 13. This motor 11 is a motor housing in the hood of a car.
It is designed to be installed with the 12 side facing up.

The brush holder device 20 is provided with a base 21 integrally formed by a suitable means such as injection molding using an insulating resin. The base 21 is a motor housing.
The housing 12 and the gear frame 13 are housed inside, and are formed in a substantially flat plate shape whose plane shape is substantially similar to the outer shapes of the both 12 and 13. A large circular hole 22 is formed in the center of the base 21, and the commutator 16 of the motor 11 is inserted into the circular hole 22.

A pair of brush holder portions 23 are arranged on the base 21 at positions facing each other, and are integrally provided so as to project from the base 21. The brush holder portion 23 is formed in a horizontally long substantially square tube shape in which the inward end surface is opened and the outward end surface is closed, and a pigtail insertion hole 24 is formed in the upper wall of the brush holder portion 23. It is arranged on the normal line and is elongated so as to open at the inner end. A brush spring 25 and a brush 26 are accommodated in the brush holder portion 23, and the brush 26 has an outer periphery of the commutator 16 by a spring 25 that exerts a reaction force on the outer wall of the brush holder portion 23 in the usage state. The surface is always in sliding contact.

A pigtail 27 is planted at one end of the brush 26,
They are mechanically and electrically connected, and a faston terminal piece 28 is mechanically and electrically connected to the other end of the pigtail 27 by caulking. Faston terminal piece
28 is formed by punching using a conductive material such as brass or the like, and bending press work to form a tubular shape with a substantially oval cross-section, and the hollow terminal portion substantially forms the terminal piece insertion portion 29. It is configured to Further, on the side wall of the faston terminal portion piece 28, an engaging convex portion 30 is stamped and formed so as to project into the insertion portion 29, and this convex portion 30 is formed in an engaging hole in a terminal portion piece of a circuit breaker described later. It is set so that it can be engaged.

A circuit breaker holding cylinder 31 is arranged on the base 21 so as to be close to one of the brush holder portions 23, and is provided so as to project vertically downward. The holding cylinder 31 has a substantially rectangular cross section and its upper surface is closed. And is integrally formed in each cylindrical shape having an opened lower surface. The tubular hollow portion of the holding barrel 31 is sized so that a circuit breaker described later can be fitted and held therein, and a holding rib 32 is provided on the inner peripheral surface of the holding barrel 31 in the vertical direction. It is arranged so as to be elongated,
It is projected inward. A pair of through holes 33 are provided in the base 21 corresponding to the ceiling wall of the holding cylinder 31 so as to be adjacent to each other, and the through holes 33 pass through a terminal piece of a circuit breaker described later and a brush 26. It has a substantially square shape.

The circuit breaker 34 is formed in a vertically long, substantially rectangular parallelepiped shape having a rectangular horizontal cross section, and a pair of terminal pieces 35a, 35b are arranged on both sides of the upper end surface of the circuit breaker 34 so as to project substantially vertically. . Engagement holes 36 are formed in both of the terminal portion pieces 35a and 35b, and these engagement holes 36 are configured so as to be able to engage with the above-mentioned engagement protrusions 30.

Next, the base 21 and the circuit breaker according to the above configuration
The work of assembling the 34 and the faston terminal piece 28 will be described.

When the circuit breaker 34 is arranged in the holding cylinder 31 of the base 21 so that the terminal pieces 35a and 35b are on the upper side and is inserted from the bottom, the rib 32 protruding from the inner peripheral surface of the holding cylinder 31 forms a circuit. The circuit breaker 34 is pressed against the circuit breaker 34.
Is held in the holding tube 31. Then, in the state where the circuit breaker 34 is held in the holding cylinder 31 all the way, the terminal pieces 35a and 35b are provided with through holes formed in their ceiling walls.
It is in a state in which it is inserted through 33, 33 and protrudes above the base 21.

On the other hand, the brush 26 is fitted in the brush holder 23 with the spring 25 interposed. At this time, Pigtail 27
Is inserted into an insertion hole 24 formed in the brush holder portion 23.

Then, until the Faston terminal piece 28 fixed to the free end of the pigtail 27 hits the terminal piece 35a of the circuit breaker 34 protruding from the through hole 33 of the base 21 from above to the upper end surface of the circuit breaker 34. Mated. In this way, since the faston terminal piece 28 is fitted until it hits the upper end surface of the circuit breaker 34, the engaging convex portion 30 projecting on the faston terminal piece 28 is the terminal piece of the circuit breaker 34. The engagement hole 36 formed in 35a is properly engaged. Due to the engagement of the both 30 and 36, the faston terminal portion piece 28 is securely coupled to the terminal portion piece 35a of the circuit breaker 34 in the state of being prevented from coming off.

After that, when the base 21 on which the circuit breaker 34 and the brush 26 and the like are assembled is put on the mount portion 14 formed on the gear frame 13, the lower surface of the circuit breaker 34 assembled on the base 21 is mounted on the mount portion 14. Since the circuit breaker 34 is abutted against the bottom surface of the formed recess 15, the circuit breaker 34 is securely mounted in the holding cylinder 31.

The present invention is not limited to the above embodiment,
It goes without saying that various modifications can be made without departing from the spirit of the invention.

For example, the assembling work of the faston terminal piece and the terminal piece of the circuit breaker is not limited to the state in which the circuit breaker is fitted in the holding cylinder, and the faston terminal The piece is pre-bonded to the terminal piece of the circuit breaker, and when the circuit breaker is inserted into the holding tube, the pigtail to which the Faston terminal piece is connected is inserted from the brush side into the through hole opened in the base. You may make it fit.

The Faston terminal piece fitted to the terminal piece of the circuit breaker is not limited to the one connected to the pigtail,
It may be connected to a lead wire.

[Effect of device]

As described above, according to the present invention, the engaging convex portion of the faston terminal piece can be properly engaged with the engaging hole of the terminal piece on the circuit breaker side. The faston terminal piece can be reliably connected mechanically and electrically.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a brush holder device according to an embodiment of the present invention, and FIGS. 2 and 3 are front sectional views and side sectional views showing the assembled state of the main part, and FIG. Is an enlarged partial bottom view showing the circuit breaker built-in portion, and FIG. 5 is a partially cut front view showing a motor in which the brush holder device is used. FIG. 6 is a partially exploded perspective view showing a conventional example, and FIG. 7 is an enlarged partial sectional view thereof. 20: Brush holder device, 21: Base, 22: Circular hole, 23: Brush holder part, 24: Pigtail insertion hole,
25 …… Brush spring, 26 …… Brush, 27 …… Pigtail, 28 …… Faston terminal piece, 29 …… Fit part, 30…
… Engaging protrusions, 31 …… Holding cylinder, 32 …… Ribs, 33 …… Through holes,
34 …… Circuit breaker, 35a, 35b …… Terminal piece, 36
...... Engagement hole.

Claims (1)

[Scope of utility model registration request] 1. A circuit breaker is assembled to a base provided with a brush holder part, and a faston terminal part piece having an engaging convex part is fitted to a terminal part piece having an engaging hole of the circuit breaker. In the brush holder device configured, a circuit breaker holding cylinder (31) into which the circuit breaker (34) can be inserted is formed in the base (21) in a cylindrical shape with one end face closed and the other end face open. At the same time, the circuit breaker holding cylinder (31) is provided on its inner peripheral surface with a retaining rib (32) for holding and holding the circuit breaker (34) housed in the cylinder. The breaker holding tube (31) has a closed wall with a through hole (33) larger than the faston terminal piece (28), and the circuit breaker (34) is Serial in a state of being held by the holding rib is inserted (32) to the circuit breaker holding cylinder (31), the circuit breaker (34)
Terminal pieces (35a, 35b) are inserted into the through holes (33), and further, the faston terminal pieces (28) are attached to the circuit breaker (34) in the terminal pieces (35a, 35b). Is fitted to the end face of the member in a state of being abutted with each other, and the engaging convex portion (30) of this faston terminal piece (28) and the engaging hole (36) of this terminal piece (35a, 35b) are A brush holder device characterized by being engaged.