JPH10108414A - Motor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce vibration due to a printed board and prevent damage to the printed board due to the attachment of connectors or the mounting of capacitors, by providing either of a fixing base for supporting a motor assembly and the printed board with a first supporting section for spacer and a second supporting section shorter than the first supporting section. SOLUTION: A motor device 11 has a printed board 16 between a fixing base 14 having a first supporting section 12 and a second supporting section 13, and a motor assembly 15. The first supporting section 12 is in contact with the printed board 16, and the printed board 16 is secured on the first supporting section 12 with small screws or adhesive. The second supporting section 13 is protruded on the printed board 16 side, is shorter than the first supporting section 12, and is not in contact with the printed board 16. As a result, noise due to vibration in the printed board 16 is prevented. Further, even if the printed board 16 is pushed when a connector is attached or a capacitor is mounted, the printed board 16 is supported by the second supporting section 13 and prevented from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor having a printed circuit board held by a housing.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional motor in which a printed circuit board is held by a housing has a motor coil connected between a motor unit 1 and a housing unit 2 integrated with the motor unit 1, and a capacitor. And the printed circuit board 4 on which the connector mounting section 3 is mounted. At this time, the printed circuit board 4 is fixed to the projecting portion 5 of the housing section 2 around the motor section 1 with screws 6, and the projecting section of the printed circuit board 4 projecting from the motor section 1 supports the printed circuit board 4. 5, the printed circuit board 4 was not supported by the housing portion 2.

[0003]

Generally, brushless motors are required to have high output, small size, low vibration, low noise, low cost and robustness as characteristics. However, in the conventional motor device, the portion of the printed circuit board 4 protruding from the motor unit 1 is not fixed by the housing unit 5, so that the printed circuit board 4 vibrates and generates noise. Further, when mounting the mounting parts such as the connector mounting part 3 and the capacitor, the printed circuit board 4 is pushed in to push the connector mounting part 3 and the like, and the printed circuit board 4 may be bent and the printed circuit board 4 may be damaged. Was.

[0004] As shown in FIG. 4, there is also a method of extending the housing portion to the projecting portion of the printed circuit board 4, providing the projecting portion 5 and fixing the printed circuit board 4 by the projecting portion 5. A large number of wirings are gathered in the vicinity of, and it is difficult to fix the printed circuit board by providing the protruding portions while having a space for providing such wirings.

An object of the present invention is to reduce noise caused by vibration of the printed circuit board 14, prevent damage to the printed circuit board due to mounting of connectors and mounting of components such as capacitors, and to provide a low-noise and robust motor device. And

[0006]

In order to achieve this object, a motor device according to the present invention comprises a fixed base for supporting a motor section, a printed circuit board disposed on the fixed base at a distance, and A first support portion for a spacer is provided from at least one of the base and the printed circuit board, and a second support portion shorter than the first support portion is provided. Also, since the printed circuit board is supported by the second support portion, it is possible to prevent the printed circuit board from being damaged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a fixed base for supporting a motor section, a printed circuit board disposed on the fixed base at a distance, and a spacer for at least one of the fixed base and the printed circuit board for a spacer. A motor device provided with a first support portion and a second support portion shorter than the first support portion, and is supported by the second support portion even when a printed circuit board is pressed when a connector is mounted or the like. .

Also, a housing having a first support portion and a second support portion, a stator mounted on the housing and having a drive coil wound thereon, a bearing held by the housing, and rotatable on the bearing A shaft fixed to the shaft, a rotor fixed to the shaft, a magnet fixed to the rotor and arranged to face the stator, and a printed circuit board having a component mounting portion and connecting the coil. Wherein the first support portion abuts on the printed circuit board, and the second support portion may protrude toward the printed circuit board.

A first support portion is provided between the component mounting portion of the printed circuit board and the motor portion, a first support portion is provided at one corner of the printed circuit board on the component mounting portion side, and the other is provided. A second support may be provided at the corner. In addition, since the component mounting portion of the printed circuit board is located on the second support portion side, when the mounted component is to be mounted, the printed circuit board is pressed against the second support portion.

In the component mounting portion of the printed circuit board, the pressing portion which is most strongly pressed at the time of component mounting is located on the second supporting portion side, so that the second supporting portion is located near the portion where the printed circuit board is pressed most. Abut Further, the connector mounting section and the first support section may be located on the second support section side.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The motor device 11 includes a first support portion 12
And a fixed base 14 having a second support 13 and a motor 1
5, a printed circuit board 16 is provided. First
The supporting portion 12 and the printed board 16 are in contact with each other, and the printed board 16 is fixed to the first supporting portion 12 by screws 17. At this time, a screw 1 is used to fix the printed circuit board 16.
Instead of 7, an adhesive may be used.

The motor section 15 includes a stator 19 around which a drive coil 18 is wound, a bearing 21 held by a housing section 20, and a shaft 22 rotatably supported by the bearing 21.
And a rotor 23 having a center fixed to the shaft 22, and a magnet 24 fixed inside the rotor 23 and arranged to face the stator 19. Although the housing portion 20 and the fixed base 14 are a unitary housing, they can be divided and fixed by screws or caulking.

On the opposite side of the printed circuit board 16 where the motor section 15 is located, a connector mounting section 25 and a component mounting section for mounting electronic components such as capacitors are provided, and are connected to the drive coil 18. The second support 13
Project to the printed circuit board 15 side, and
2 and is not in contact with the printed circuit board 16. In addition, a connector, a capacitor,
A component mounting portion where transistors and the like are mounted and wirings are densely located is located, and when compared with the first support portion 12, the second support portion 13 is near the connector mounting portion which is pressed most strongly. Have been placed.

More specifically, one embodiment of the motor device of the present invention will be described in detail. It comes into contact with the first support portion 12 and is fixed by screws. At a triangle among the squares of the printed circuit board, the first support portion 12 is in contact with and fixed by screws 17. The remaining corner 26 is closest to the connector mounting position of the component mounting portion which is pressed most strongly as compared with the first support portion 12, and
On the side, the second support portion 13 faces with a small space of about 1 mm. At this time, the length of the first support is 3 mm, and the length of the second support is 2 mm. The connector mounting portion 25 is 20 mm from the long side of the printed circuit board 16.
It is 5mm away from the short side.

The length of the first support portion 12 and the length of the second support portion 13 vary depending on the material of the printed circuit board 16, the dimensions of the printed circuit board 16, the positions of the screws 17, and the like. With the configuration described above, the motor device 11 has low vibration and low noise because it is fixed to the portion where the connector mounting portion 25 of the printed circuit board 16 is mounted by the first support portion. At the time of mounting, the first support portion does not abut the printed circuit board 16 in a portion where a large amount of wiring is required, for example, near a portion where a large amount of wiring or the like of the connector mounting portion 25 or the like requires a large space. Provide sufficient space for wiring, etc. However, when mounting components on the printed circuit board 16, for example, when mounting a connector on the connector mounting section 25, even if the printed circuit board is pressed, the printed circuit board 16 is brought into contact with the second support section to prevent damage to the printed circuit board. Can be.

[0016]

As is clear from the description of the above embodiment,
According to the first, second, third, and fourth aspects of the present invention, the mounting portion of the printed circuit board is provided with a sufficient space for wiring and the like, while firmly preventing vibration and noise from occurring. The printed circuit board is fixed, and even when the printed circuit board is to be mounted, the printed circuit board is supported by the second support portion even when the printed circuit board is pressed, thereby preventing damage to the printed circuit board.

Further, the invention according to claims 5 and 6 is the most suitable arrangement of the second support portion, and can appropriately support the printed circuit board.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a motor device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the motor device.

FIG. 3 is a perspective view of a conventional motor device 1.

FIG. 4 is a perspective view of a conventional motor device 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Motor apparatus 12 1st support part 13 2nd support part 14 Fixed base 15 Motor part 16 Printed circuit board

Claims (6)

[Claims] A fixed support for supporting a motor portion, a printed circuit board disposed on the fixed support at an interval, and a first support portion for a spacer on at least one of the fixed support and the printed circuit board. And a second support portion shorter than the first support portion. 2. A housing having a first support and a second support, a stator mounted on the housing and wound with a drive coil, a bearing held by the housing, and a rotatable bearing mounted on the housing. A shaft fixed to the shaft, a rotor fixed to the shaft, a magnet fixed to the rotor and arranged to face the stator, and a printed circuit board having a component mounting portion and connecting the coil. 2. The motor device according to claim 1, wherein the first support portion contacts the printed circuit board, and the second support portion protrudes toward the printed circuit board. 3. 3. A printed circuit board comprising: a first support portion between a component mounting portion and a motor portion; a first support portion provided at one corner of the printed circuit board on the component mounting portion side; 3. The motor device according to claim 1, wherein a second support portion is provided at the corner. 4. The motor device according to claim 1, wherein the component mounting portion of the printed circuit board is located on the second support portion side. 5. The motor device according to claim 1, wherein, in the component mounting portion of the printed circuit board, a pressing portion that is most strongly pressed during component mounting is located on the second support portion side. 6. The motor device according to claim 1, wherein the connector mounting portion is located on the second support portion side.