JPH0210788Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an improvement of a small and convenient brush holding mechanism that is integrated into one end of a small motor.

[Issues with conventional technology]

The word "small" in the term "small motor" is used in a very wide range of meanings. Applications include driving machines or devices, toys, accessories for household appliances, power sources for everyday appliances, and driving sources for measuring instruments.
In many applications, brushes have been proposed and used as motor accessories that are strong and long-lasting, are extremely easy to assemble, are easy to connect to a power source during use, and are solid. But not enough has been achieved. In particular, we have not found anything that includes a replaceable brush mechanism that satisfies the requirements of being housed and fixed in a specific location of the motor in an extremely small volume with one touch.

[Purpose and main components of the invention]

In response to the above-mentioned drawbacks and demands of the conventional technology, the present invention incorporates a brush holding mechanism with replaceable brushes in a part of the body of a small motor, and has a holding connection structure that is extremely easy to connect depending on the power source. To provide a device having a motor brush holding mechanism that allows parts to be set, facilitates assembly work, and connection work, and is strong, firm, and highly reliable.
Conventionally, the replaceable brush holding mechanism and the motor body have been treated as separate entities, but in the present invention, they are manufactured by integral molding and are mass-produced. By providing this, users can purchase a small brush-holding motor that can be fully guaranteed as a mass-produced standard product during motor manufacturing with peace of mind as it is convenient and simple to use, reducing costs.

[Structure and implementation examples of the present invention]

An embodiment of the present invention will be explained based on the drawings. FIG. 1A shows the brush holding device of the present invention by selecting an appropriate position of the cover 1C integrated with the cover insulator 1 at one end of the shaft 11 in an area A surrounded by a dotted circle at one end of the small motor main body 12. will be established. Figure 1A shows an enlarged side view with a partial cross section;
FIG. 1B is a front view. In the example, the motor is large enough to be placed in the palm of a child's hand, and the device of the present invention is large enough to be placed on the tip of a finger.

Regarding Figure 1A, parts are shown in Figure 2.
This will be explained in FIGS. 3 and 4. A bracket 1 made of an electrically insulating material includes an end cover 1C of a shaft 11 supporting a bearing 10, supporting parts 1A, 1B of the present invention, etc.
It is manufactured to be connected to the body and is screwed onto the main body 12. FIG. 2 is a partially enlarged perspective view of the mounting bracket 1 of the present invention, which is integrally molded into the bracket 1 together with other mechanical parts as shown in FIG. 1B. Both side support walls 1A and a closed end support wall 1B are provided, and the hole 2 is provided with a brush lead wire 1 with a spring 3 attached to the brush 5 shown in FIG. 3B.
4 is a wall hole in a mounting chamber for an assembly in which a brush terminal 4 is fixed. The illustrated example has a quadrilateral cross section, but
Depending on the cross-sectional shape of the brush 5, the spring 3
It is applied in a shape suitable for the shape of the object. Some are circular, elliptical, polyhedral, or a combination of these.

FIG. 1A shows the apparatus of the present invention between the bracket 1 shown in FIG. 2, the both side support walls 1A, the closed end support wall 1B, and the hole 2, which are integrally molded, and FIG. 3A shows a perspective view. The brush terminal 4 shown in the side view with the brush 5, brush lead wire 14, and spring 3 attached to B is fitted. The brush cap 7 is lightly pressed into contact with the outer surface of the fitted brush terminal 4 so as to be in contact with the wall 1B from the direction perpendicular to the brush holder 2, and the retaining protrusion 8 of the brush cap 7 is pressed into contact with the brush terminal 4. It has a structure in which it is fitted and fixed in a provided retaining hole 9. The cap 7 has a wide part 18 with a protrusion 8 provided with a step part 19 for fitting into the fitting groove 20 shown in FIG. It is an integrally molded body with a diagonal body 211 which is integrally connected with 17.
On the upper surface of the portion 17, the stepped portion 19 of the portion 18 is the wall 1A.
It is on the same level as the stepped surface 19A of the portion 18 of the brush cap 7 which abuts the surface 20A of the charging groove 20 provided in the brush cap. The bracket 1 and brush cap 7 are made of electrically insulating material, and the brush terminal 4 is made of electrically conductive material. As shown in FIG. 3B, the brush terminal 4 is provided with a convex portion 6 so that it can be mounted in a direction perpendicular to the brush holder hole 2 and does not shift.
6, and fit the protrusion 6 and side surface 06 into the brush holder 2. A small hole 16 is provided on the tip surface of the convex portion 6, and one end of the brush lead wire 14 is soldered, crimped, brazed, or welded.
The other end of the brush 4 is fixed to the upper protrusion 13 of the brush 5.
The lower surface 15 of the brush 5 is relatively curved.
Both ends of the spring 3 are mounted between the side surface 06 of the convex portion 6 and the upper surface convex portion 13 of the brush 5 while maintaining a required distance from the brush lead wire 14 . The spring 3 always has elasticity in the direction of separating the brush 5 from the brush terminal 4, and can be expanded and contracted in response to the operation of the lower surface 15 of the brush 5. The end 10 of the brush terminal 4 with the other hole 19 is for connecting the device of the invention to another power source not shown. The hole 19 is fitted with a protrusion of a connector (not shown), and due to the protrusion, the connector is securely, easily and easily fitted and connected, and connected to a power source by a conductive wire attached to the connector.

〔effect〕

As already explained with reference to the embodiments, the present invention is extremely compact, and the brush holder 2 is designed to be housed within the support wall integrally formed with the motor bracket.
The brush lead wire 14 and the spring 3 are telescopically attached between the brush 5 and the brush terminal 4, and the brush terminal 4 is supported and held by the supporting walls 1A and 1B formed integrally with the bracket 1. It is held by a brush cap 7 which is pressed into contact with the upper surface.
For locking, a simple method is used in which one terminal 4 is provided with a fitting hole and the other cap 7 is provided with a protrusion, and the protrusion and the hole are fitted.

As described above, the present invention is made up of minimally divided parts, which can be made of an electrical conductor or an electrical insulator depending on the purpose of the parts, making it extremely easy to manufacture and assemble the parts. In addition, the user can assemble the device with confidence, and it is easy to connect it to other devices, such as a power source. It is advantageous for both production and use, and also helps reduce costs.

[Brief explanation of the drawing]

FIG. 1A is an enlarged partial cross-sectional side view of one embodiment of the embodiment, FIG. 1B is a front view of the same, and FIG. 2 is an exemplary perspective view of a casing and a support wall. Figure 3A,
B is a perspective view and a side view of an example of a brush terminal. FIG. 4 is a perspective view of the protrusion for preventing the brush cap from coming off. 1... Bracket, 1A... Both support walls, 1B...
...End support wall, 2...Brush holder hole, 3...Spring, 12...Motor body, 4...Brush terminal, 5...Brush, 6...Brush terminal convex portion, 15
... Brush lower end face, 7 ... Brush cap, 8
...Cap protrusion, 9...Fitting hole, 14...Brush lead wire.

Claims (1)

[Scope of utility model registration request] A support molded integrally with the motor bracket insulator at a predetermined location on the outside of the motor, in a device that holds a small brush provided at a predetermined location on one end of the outer shell of a small motor and is connected to a conductor outside the motor. The walls (1A, 1B and 1), the insertion hole 2 for the brush 5 provided in the bracket between the walls, the brush terminal 4 connected to the brush 5, the cap 7 in contact with the upper surface of the terminal 4, and the cap 7 A brush lead wire 14 is fixed to a convex part 6 attached to the lower surface of one end of the terminal 4, and the convex part of the brush terminal 4 conducts electricity to the brush 5. A brush holding device for a small motor, characterized in that a terminal 4 is fitted into a charging hole 2, and the other end 10 of the terminal 4 is protruded to the outside of a bracket 1 by a required length to serve as a connection part.