JPH08149744A - Miniature motor - Google Patents

Abstract

PURPOSE: To obtain an inexpensive miniature motor which can operate with high efficiency for a long term. CONSTITUTION: A brush comprises a part 12 for stopping a brush part, and a terminal part 13. A brush is inserted into a hole part 21 from the inside of a bracket 2 such that the stopping part 12 and the terminal part 13 are exposed to the outside of the bracket 2 bonded to the motor case 3. Lead wires 4, 5 are then soldered to the terminal part 13 while arranging the forward end part thereof. Finally, the lead wires 4, 5 are pushed into between the two hooks at the stopping part 12 and stopped thereat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small motor, in particular, a small brushed motor having a diameter of several millimeters and a lead for energizing the motor, which is used for a vibration generator such as a small portable radio caller or a mobile phone. Regarding the connection of wires.

[0002]

2. Description of the Related Art Conventionally, as a method of connecting a small motor with a brush and a lead wire for energizing the motor, there is known a technique of soldering the lead wire to a bracket integrally formed with the brush. This method is generally widely used because it is easy to carry out, but there is a problem that it is easily broken when some impact is applied, such as a lead wire being pulled when a motor is incorporated in a product.

Further, there is also well known a technique in which an engaging portion is integrally provided on a bracket and a lead wire is wound around or hooked on the engaging portion for connection. However, this method has a problem in that the structure of the mold used for making the bracket becomes complicated and the manufacturing time and cost of the mold increase. In addition, the locking portion is easily disengaged from the bracket especially at low temperatures, which is unsuitable as a motor to be incorporated in products which are often used outdoors in cold weather. On the other hand, in order to prevent this, it is conceivable to make the locking portion and its mounting portion thicker, but the entire motor becomes large, which causes new inconvenience.

[0004]

In view of the above disadvantages, it is an object of the present invention to provide a small motor which is easy to assemble and install and can be used for a long time in various usage environments. To do.

[0005]

The above-mentioned problem is a small motor with a brush that is energized from a lead wire through a brush, and has at least one fixing portion and one locking portion for holding the lead wire. And a small motor characterized by the above.

[0006] Preferably, the brush is a small motor characterized in that the terminal portion and the locking portion are integrally formed.

Even more preferably, the small-sized motor is characterized in that the engaging portion has a hook shape.

[0008]

Since the lead wire is fixed and held at at least two places, the lead wire and the motor are unlikely to come off, and the lead wire can be used for a long time even in a cold place. Further, since it is not necessary to make the hook portion and its mounting portion thick, the outer shape of the entire motor does not become large.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing a usage state of an apparatus utilizing the present invention. 2 is a diagram showing a brush according to the present invention, and FIG. 3 is a diagram showing a state in which the brush is inserted in the bracket.

Reference numeral 1 is a brush made of a conductive material.
The brush 1 includes a sliding contact portion 11, a locking portion 12, and a terminal portion 13. The locking portion 12 is partially notched, and has hooks on both sides of the notch. 2 is a bracket, which has a hole 21 at an arbitrary position according to the design of the product.
Are provided in plural. Bracket 2 in this hole 21
When the brush 1 is inserted from the inside, the locking portion 12 and the terminal portion 13 are configured to protrude to the outside of the bracket. At this time, if there is a gap between the engaging portion 12, the terminal portion 13 and the hole portion 21, it may be filled with solder or adhesive. Reference numeral 3 denotes a motor case, which incorporates a magnet serving as a stator, a rotor serving as a rotor, and the like. After inserting the brush 1 into the bracket 2,
The bracket 2 is fixed to the motor case 3 by a usual means. Reference numerals 4 and 5 are lead wires for energizing the motor.

First, the lead wires 4 and 5 are provided with their end portions 41 and 5, respectively.
1 to the terminal portion 13, and the tip portions 41 and 51 and the terminal portion 1
3 and 3 are fixed by a known means such as soldering. Further, push the lead wires 4 and 5 from above between the two hooks at the cutout portions of the locking portion 12, and further turn the lead wires 4 and 5 and then hook them on the locking portion 12. Lock. In this embodiment, solder is used for joining the lead wire tip portions 41, 51 and the terminal portion 13, but other adhesives or the like may be used depending on the application. Further, in this embodiment, two hooks are used for the locking portion, but the number of hooks may be changed, and the shape is not limited to a hook shape, but a lead wire may be locked for example. You may.

【The invention's effect】

The present invention has the above configuration.
With such a configuration, it is possible to provide a motor that is extremely small in size, low in unit price, and can withstand long-term use. That is, it is possible to greatly reduce the possibility that the lead wire will come off the motor due to some impact during assembly work or use, which has not been solved in the past, or due to low temperature. Therefore, by carrying out the invention of the present application, it is possible to obtain a small motor in which the defective product occurrence rate during assembly work is reduced, the unit price of the product can be reduced, and the completed product can be used for a long period of time.

In addition, the leads can be attached after the motor has been assembled. Therefore, for example, even if it becomes necessary to change the length of the lead wire according to the application of the motor, it is possible to attach the lead wire of a length according to the application later to the already assembled motor. There are many manufacturing advantages such as assembly efficiency and inventory management,
It is possible to obtain a very convenient small motor.

[0014]

[Brief description of drawings]

FIG. 1 is a diagram showing a usage state.

FIG. 2 is a diagram showing a brush according to the present invention.

FIG. 3 is a diagram in which the brush according to the present invention is inserted into a bracket.

[Explanation of symbols]

 1 Brush 11 Brush Part 12 Locking Part 13 Terminal Part 2 Bracket 21 Hole Part 3 Motor Case 4 Lead Wire 41 Tip Part 5 Lead Wire 51 Tip Part

Claims (3)

[Claims] 1. A small motor with a brush, which is energized from a lead wire through a brush, characterized by comprising at least one terminal portion for connecting the lead wire and one locking portion. motor. 2. The small motor according to claim 1, wherein the brush integrally forms the terminal portion and the locking portion. 3. The small motor according to claim 1, wherein the engaging portion has a hook shape.