JPS5850513B2 - Electrical component mounting device for small motors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for electrical components such as rectifiers and capacitors for small motors, and its purpose is to:
The overall length of the motor can be shortened, making it easier to install electrical parts and increasing the reliability of the wiring. The purpose is to make the work easier.

Conventionally, when installing electrical parts for a small motor, as shown in Fig. 1, electrical parts 2 such as a capacitor for noise prevention and a rectifier are fixedly connected to a printed board 3 on the outside of a motor bearing stand 1, and then heat welded 4. Or, as shown in Figure 2a, a recess 5 is provided in the bearing holder 1, and the electric component 2 is inserted into the recess 5, and the wiring 6 is installed as shown in Figure 2. I was trying to connect the wires by

The one in Figure 1 has the electric component 2 mounted on the printed board 3, so it has high fixation reliability, but has the disadvantage that the overall length of the motor is longer. , the overall length of the motor is shorter, but wiring inside the bearing stand is difficult.
Soldering is troublesome for subsequent wiring processing, and there is a risk of contact with the brush 7 and other parts, causing a short circuit.

The present invention has been made in view of this point, and will be described in detail with reference to Examples above.

In FIG. 3, reference numeral 1 denotes a bearing pedestal, in which a brush 7 and a bearing 8 are provided, a recess 5 is provided in this bearing pedestal 1, and a connecting terminal 9 of an electrical component 2 inserted into the recess 5 is connected to the bearing pedestal 1. A connecting terminal 9 is connected to a printed circuit board 3 that protrudes inward (toward the commutator 10 side) and arranged inside the bearing stand 1, and is soldered 11 as shown in FIG.

In Figure 3, 12 is a terminal, 13 is a rotor, and 14 is a stator (
(permanent magnet), 15 is a case.

When the recess 5 is provided inside the bearing pedestal 1 as shown in FIG. 5, the electric component 2 can be mounted on the bearing pedestal 1 after being soldered to the printed board 3 and made into a block as shown in FIG.

In this case, the thin portion 16 may be passed through.

Also, when attaching the printed board 3 to the bearing stand 1,
The rib 17 is formed as shown in Fig. 4, and the rib 17 is formed as shown in FIG.
The printed board 3 may be press-fitted into the 7th part and fixed.
As shown in the figure, the boss 18 protruding from the bearing stand 1 may be inserted into the printed board 3 and heat welded.

Furthermore, as shown in FIG. 8, an elastic rib 19 having spring properties may be formed on the inner surface of the bearing stand 1, and the printed board 3 may be attached to the elastic rib 19.

As described above, the present invention includes forming a recess in a bearing stand provided with a brush and a bearing, inserting an electrical component such as a capacitor or a rectifier into the recess, and protruding the connection terminal of the electrical component inward. Since the connection terminals are connected to the printed board placed on the inner surface of the bearing stand, the overall length of the motor can be shortened.
It is easy to install electrical parts, and since a printed board is used, the reliability of the wiring can be improved.Also, the printed board is press-fitted into the ribs formed on the bearing stand, making it easy to fix the printed board. This makes it easy to install electrical parts, and since the printed board snaps onto the elastic ribs formed on the bearing stand, the printed board can be fixed even more easily and securely. It is something that plays.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a small motor equipped with an example of a conventional electric component mounting device, Fig. 2 is a configuration diagram of another example of the same, Fig. 1a is a partially cutaway front view, and Fig. 3 is a vertical sectional view of a small motor equipped with an embodiment of the present invention, FIG. 4 is a side view of the same bearing stand, and FIG. 5 is a longitudinal sectional view of a small motor equipped with another embodiment of the present invention. 6 is a block diagram of the electrical components used in the same as above, FIG. 7 is a longitudinal sectional view of a bearing stand according to another embodiment of the present invention, and FIG. 8 is another implementation of the same as above. FIG. 3 is a longitudinal cross-sectional view of an example bearing stand. 1... Bearing stand, 2... Electrical parts, 3.
...Printed board, 5...Recess, 7...
...Brush, 8 is bearing, 9... Connection terminal, 17
...Riff, 19...Elastic rib.

Claims (1)

[Scope of Claims] 1. A recess is formed in a bearing stand provided with a brush and a bearing, an electrical component such as a capacitor or a rectifier is inserted into the recess, and a connecting terminal of the electrical component is made to protrude inward, An electrical component mounting device for a small motor, characterized in that the connection terminal is connected to a printed board provided on the inner surface of a bearing stand. 2. The electrical component mounting device for a small motor as set forth in claim 1, wherein the printed board is press-fitted into a rib formed on the bearing stand and fixed therein. 3. The electrical component mounting device for a small motor as set forth in claim 1, wherein the printed board is attached to elastic ribs formed on the bearing stand.