JP2002218699A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor which has a sealing component between an opening of a housing and a cover component which closes the opening, and has an easy and sure operation to fix the sealing component for the cover component. SOLUTION: The cover component 13 has retaining parts which comprise continuous holes 13c, 13d and continuous holes 13e with buried parts 13f at the fixed positions. The sealing component is molded in one body with the cover component 13 in order hook the retaining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly, to a motor in which a speed reduction mechanism and a control circuit board are integrally accommodated.

[0002]

2. Description of the Related Art As a drive source of a vehicle power window device, a motor with a reduction mechanism in which a motor section and a reduction section for reducing the rotation of the motor section are integrally assembled is generally used. The motor section has a yoke housing for accommodating an armature, a magnet, etc., while the reduction section has a resin gear housing for accommodating a reduction mechanism, and the yoke housing and the gear housing are connected by screws so that the openings face each other. Fixed. Some of such motors further include a control circuit board for integrally controlling the rotation of the motor unit. That is, a board housing part for housing the control circuit board is formed in a part of the gear housing, and the control circuit board is housed and fixed through the opening of the board housing part.

[0003] In addition, the gear housing needs to be hermetically sealed with an opening in order to prevent intrusion of liquid such as water or dust from the outside. Therefore, the opening is closed with a resin lid member and fixed to the housing. I am trying to do it. In addition, a seal member elastically deformed in a state where the cover member is attached is interposed between such a cover member and the opening of the gear housing to reliably prevent liquid or dust from entering from the opening. I have.

[0004]

When the above-mentioned seal member is fitted to the lid member, the lid member may come off when the lid member is attached, and the work of attaching the lid member so that the seal member does not come off. Is complicated. Also, since the seal member is not fixed to the lid member, for example, a part of the seal member pops out when the lid member is fixed,
The sealed state of that part will be impaired. For this reason, conventionally, the sealing member has been securely fixed to the lid member with an adhesive.

[0005] However, the work of fixing the seal member with the adhesive is a complicated work, and the workability is poor. Moreover, it takes time for the adhesive to dry. Therefore, there is a problem that the number of steps for assembling the motor increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a motor having a seal member between an opening of a housing housing and a lid member closing the opening. It is another object of the present invention to simply and reliably fix the seal member to the lid member.

[0007]

In order to solve the above-mentioned problems, an invention according to claim 1 is provided with a motor section for rotating a rotating shaft, a reduction mechanism for reducing the rotation of the rotating shaft, and the motor. A reduction unit having a gear housing for accommodating a control circuit board for controlling the rotation of the unit is integrally assembled,
A motor provided with a lid member for closing an opening of a housing portion of the gear housing, wherein the lid member has a locking portion at a predetermined position, and the lid member is locked to the locking portion so as to be locked with the locking portion. A sealing member made of an elastic resin integrally formed with the opening to seal the opening.

According to a second aspect of the present invention, there is provided a motor having a yoke housing for rotatably accommodating a rotating shaft, a speed reduction mechanism for reducing the rotation of the rotating shaft, and controlling the rotation of the motor. A reduction section having a gear housing for accommodating the control circuit board is integrally assembled, and covers the opening of the accommodation section of the gear housing, and is interposed between the opening and the opening of the yoke housing. A motor having a lid member having a portion, wherein the lid member is
A locking member is provided at a predetermined position, and a sealing member is formed integrally with the lid member so as to be locked with the locking portion, and is made of an elastic resin that seals the two openings.

The invention described in claim 3 is the first or second invention.
, The locking portion is provided at a plurality of locations along the periphery of the lid member. According to a fourth aspect of the present invention, in the motor according to any one of the first to third aspects, the locking portion is provided in a hole filled with a part of the seal member, and provided in the hole. And a buried portion buried in the seal member filled in the hole.

According to a fifth aspect of the present invention, in the motor according to any one of the first to third aspects, the locking portion includes:
A communication hole communicating one side surface and the other side surface of the lid member, wherein the seal member molded on one side surface of the lid member and the seal member molded on the other side surface are connected via the communication hole. I made it.

According to a sixth aspect of the present invention, in the motor according to any one of the first to fifth aspects, the gear housing houses a rotating shaft housing portion for housing the rotating shaft and the control circuit board. Having the same opening as the substrate accommodating section,
The lid member covers the opening.

(Operation) According to the first aspect of the present invention,
The lid member has a locking portion at a predetermined position, and a sealing member made of an elastic resin is integrally formed with the lid member so as to lock with the locking portion, thereby closing the opening of the gear housing. Therefore, since the seal member is formed integrally with the lid member, the seal member can be easily fixed without the need to fix the seal member to the lid member. Moreover, since the seal member is locked with the locking portion provided on the lid member, the seal member can be securely fixed to the lid member.

According to the second aspect of the present invention, the lid member has a locking portion at a predetermined position, and the sealing member made of an elastic resin is locked to the locking member so as to lock with the locking portion. The two openings of the gear housing and the yoke housing are integrally formed and are sealed. Therefore, since the seal member is formed integrally with the lid member, the seal member can be easily fixed without the need to fix the seal member to the lid member. Moreover, since the seal member is locked with the locking portion provided on the lid member, the seal member can be securely fixed to the lid member.

According to the third aspect of the present invention, since the locking portions are provided at a plurality of positions along the periphery of the lid member, the seal member can be securely fixed to the lid member. According to the invention as set forth in claim 4, the locking portion is formed by the hole filled with a part of the seal member and the embedded portion provided in the hole and embedded in the seal member filled in the hole. As a result, the seal member filled in the hole is locked to the embedded portion, so that the seal member is securely fixed to the lid member. With this configuration, the locking portion can be easily configured.

According to the fifth aspect of the present invention, the locking portion is formed of a communication hole communicating one side surface and the other side surface of the lid member, and is formed between the sealing member formed on one side surface of the lid member and the other side surface. The seal member is securely fixed to the lid member by being connected to the seal member to be molded through the communication hole. With this configuration, the locking portion can be easily configured.

According to the invention described in claim 6, the lid member covers the same opening as the rotating shaft housing for housing the rotating shaft and the substrate housing for housing the control circuit board. Therefore, since the lid member can be shared by the two housing portions, the number of parts can be reduced.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a motor 1 with a speed reduction mechanism according to the present embodiment. FIG. 2 is an exploded view of the motor 1, and FIG. 3 is an exploded view of the motor 1 as viewed from a direction A in FIG.

As shown in FIGS. 1 to 3, the motor 1 is used as a drive source of a vehicle power window device. The motor 1 is configured such that a motor unit 2 and a reduction unit 3 that reduces the rotation of the motor unit 2 are integrally assembled.

As shown in FIG. 3, the motor portion 2 has a flat cylindrical bottomed yoke having a pair of parallel flat portions 4a and a pair of arc portions 4b respectively connecting ends of the flat portions 4a. It has a housing 4. The plane direction of the plane portion 4a is the flat direction of the motor 1. The yoke housing 4 is made of a magnetic material, and a plurality of magnets 5 are fixed at predetermined positions on the inner surface thereof. An armature 6 is rotatably accommodated inside the magnet 5. The armature 6 has a rotating shaft 7, and the base end of the rotating shaft 7 is rotatably supported by a bearing 8 provided at the bottom of the yoke housing 4. A commutator 9 is fixed to the tip of the rotating shaft 7.

A brush holder 10 is fitted into the opening 4c of the yoke housing 4. In the brush holder 10,
A pair of brushes 11 that are in sliding contact with the commutator 9 are held. A bearing 12 is held at the center of the brush holder 10, and the bearing 12 rotatably supports the tip end side of the rotating shaft 7. This brush holder 10 is formed integrally with the lid member 13.

The lid member 13 is made of resin, and is interposed between an opening 4c of the yoke housing 4 and an opening 21e of a gear housing 21, which will be described later, and covers both openings 4c and 21e. The cover member 13 has a pair of connecting pieces 14 electrically connected to the pair of brushes 11 respectively.
It extends in one direction (the direction in which the motor unit 2 is assembled). A sealing member 15 made of an elastomer resin is integrally formed with such a lid member 13 by two-color molding at a position that seals the opening 4 c of the yoke housing 4 and the opening 21 e of the gear housing 21.

Here, the lid member 13 is connected to the opening 4c of the yoke housing 4 and the opening 2c of the gear housing 21.
The first portion 13e is a first portion 13a (right side in FIG. 3) for sealing, and the remaining portion of the opening 21e of the gear housing 21 is a second portion 13b for sealing.

The first portion 13a of the lid member 13 includes
As shown in FIG. 3, a plurality of communication holes 13c and 13d are provided at predetermined positions around and around the outer periphery of the brush holder 10 where the opening 4c of the yoke housing 4 and a part of the opening 21e of the gear housing 21 abut. Is formed (Fig. 6
(Only the communication hole 13c is shown in (a).) Then, the lid member 13
The seal member 15 is integrally formed on substantially the entire surface 13x on the yoke housing 4 side and the surface 13y on the gear housing 21 side, and the seal members 15 formed on both surfaces 13x and 13y are connected via the communication holes 13c and 13d. (Only the communication hole 13c is shown in FIG. 7A). In this case, by providing such a connecting portion, movement and peeling of the seal member 15 with respect to the lid member 13 are prevented, and the seal member 15 is securely fixed to the lid member 13.

The second part 13b of the lid member 13 includes
As shown in FIG. 5, an opening 21e of the gear housing 21 is provided.
A plurality of communication holes 13e are formed at predetermined positions on the outer peripheral edge with which the remaining portions abut (see FIGS. 6B to 6D). The communication hole 13e is filled with an elastomer resin forming the seal member 15, and the buried portion 1 is buried so that the filled resin does not escape.
3f is formed. The seal member 1 is provided on the outer peripheral edge of the surface 13y of the cover member 13 on the gear housing 21 side.
5 is integrally formed, and the seal member 15 formed on the surface 13y is filled in the communication hole 13e as shown in FIGS. 7B to 7D. In this case, the filled resin is prevented from coming out by the embedded portion 13f provided in the communication hole 13e, and the movement and separation of the seal member 15 with respect to the lid member 13 are prevented, and the seal member 15 is attached to the lid member 13. It is designed to be securely fixed.

The sealing member 15 prevents water from entering the opening 4c of the yoke housing 4 and the opening 21e of the gear housing 21.
Further, since the lid member 13 seals the opening 4c of the yoke housing 4, the brush powder generated at the time of sliding contact of the brush 11 is prevented from scattering to the clutch 22 and the control circuit board 31, which will be described later, and the malfunction of the motor 1 is prevented. It is supposed to. Further, as shown in FIGS. 2 and 4, the seal member 15 is provided with two pressing projections 15a for pressing the end surface of the control circuit board 31 by its elastic force at two predetermined positions.

The lid member 13 is used for the brush holder 1.
0 is inserted into the yoke housing 4 and then fitted into the opening 21e of the gear housing 21. The yoke housing 4 is fixed to the gear housing 21 with screws 16 and nuts 17 at predetermined three places with the lid member 13 interposed therebetween.
Is fixed by Further, the cover member 13 is further provided with the gear housing 21 at two places separated from the yoke housing 4.
Are fixed by screws 16 and nuts 17. In this case, a part of the lid member 13 is
The gear housing 21 and the metal plate 18 are fixed by screws 16 and nuts 17 while being held between the gear housing 21 and the metal plate 18.

On the other hand, the speed reducer 3 has a gear housing 21 made of resin. The gear housing 21 includes a rotating shaft housing 21a, a worm shaft housing 21b communicating with the housing 21a and extending in the direction of the axis L1 of the motor 1.
A worm wheel housing 2 communicating with the housing 21b and extending in a direction orthogonal to the direction of the axis L1 of the motor 1 and in a plane direction (flat direction) of the plane portion 4a of the yoke housing 4.
1c and a substrate housing 21d communicating with the rotating shaft housing 21a and extending to the opposite side of the worm wheel housing 21b (axis L1). The rotating shaft accommodating portion 21a and the substrate accommodating portion 21d have the same opening 21e that opens to the motor unit 2 side.

In the rotating shaft receiving portion 21a, a driving side portion 2 constituting a clutch 22 is provided at a tip end of the rotating shaft 7.
2a is provided so as to be integrally rotatable. Incidentally, the drive side portion 22a accommodates the magnet 5 and the armature 6 in the yoke housing 4, and the cover member 13 (the brush holder 1).
After assembling (0), it is fixed to the tip of the rotating shaft 7. A sensor magnet 23 for detecting rotation of the rotating shaft 7 is fixed to a predetermined portion of the drive side portion 22a.

Here, the clutch 22 is composed of the driving side portion 22a and a driven side portion 22b which is provided so as to be integrally rotatable with a worm shaft 24 described later. Clutch 2
Reference numeral 2 denotes a configuration in which the torque from the drive side portion 22a is transmitted to the driven side portion 22b as it is, while the torque from the driven side portion 22b is not transmitted to the drive side portion 22a. That is, the rotational force of the rotating shaft 7 driven by the motor unit 2 is transmitted to the worm shaft 24 via the clutch 22, and the rotational force from the worm shaft 24 is not transmitted to the rotating shaft 7. The clutch 22 is assembled at the same time when the motor unit 2 and the speed reduction unit 3 are assembled, and the drive shaft and the worm shaft 24 are mutually connected.

In the worm shaft housing 21b, a worm shaft 24 integrally formed with a worm 24a is rotatably supported by a pair of bearings 25 disposed in the housing 21b. At the base end of the worm shaft 24, a driven side portion 22b constituting the clutch 22 is provided so as to be integrally rotatable.

In the worm wheel receiving portion 21c, the worm wheel 26 meshing with the worm 24a is rotatably stored. At the center of the worm wheel 26, an output shaft 27 connected to a window regulator (not shown) of the power window device is fixed. Then, the rotational force of the worm shaft 24 is transmitted to the output shaft 27 via the worm wheel 26, and the window regulator operates.

The control circuit board 31 is accommodated in the board accommodating portion 21d. The control circuit board 31 has a control circuit 32 for controlling the rotation of the motor 1 mounted thereon. A guide groove 21f for guiding both ends in a direction orthogonal to the insertion direction of the control circuit board 31 is provided in the board accommodation portion 21d.
Are formed parallel to the direction of the axis L1 of the motor 1. Accordingly, the control circuit board 31 is inserted along the guide groove 21f such that the component mounting surface 31a on which the control circuit 32 and the like are mounted is parallel to the plane direction (flat direction) of the plane portion 4a of the yoke housing 4. You. Then, as shown in FIG. 8, when the lid member 13 is attached, the end surface of the control circuit board 31 is pressed by the elastic force of the pressing projection 15a formed integrally with the seal member 15, and the control circuit board 31 is released. It is housed without sticking.

As shown in FIG. 8, a connector base 33 is fixed to the control circuit board 31 by screws 34. The connector base 33 supports each of the six terminals 35 at predetermined positions. Each terminal 35
A base end 35a is erected on the substrate 31 and the control circuit 3
2, and the front end 35 b is bent so as to be parallel to the substrate 31 and the back surface 33 of the connector base 33.
a through the respective insertion holes 33b formed in the base 33 to penetrate the base 33. Also, the connector base 33
As shown in FIGS. 8 and 10, a guide 33c for regulating the position of each terminal 35 is provided on the rear surface 33a. Unnecessary movement of each terminal 35 is regulated by this guide 33c, and deformation of each terminal 35 is prevented.

Here, the gear housing 21 has a connector portion 21g extending parallel to the direction of the axis L1 of the motor 1 and connected to a vehicle-side connector (not shown) extending from the vehicle side. A communication hole 21h is formed in the connector portion 21g and extends in the same direction to communicate the board housing portion 21d with the outside. In this communication hole 21h,
The connector base 33 is inserted so that each terminal 35 is exposed in the communication hole 21h. And
The connector portion 21g is connected to a vehicle-side connector, and the control circuit 32 is connected to the vehicle-side connector via each terminal 35.
, A driving power supply and a control signal are input.

The control circuit board 31 includes the cover 1
A pair of female terminals 36 for electrical connection with the pair of connection pieces 14 extending from 3 are attached. As shown in FIG. 9, the female terminal 36 is fixed to the substrate 31 and is electrically connected to the control circuit 32.
A leaf spring portion 36b extending from the base portion 36a and elastically deformable in the vertical direction of the substrate 31, and an insertion connection portion 36c extending from the leaf spring portion 36b and having a substantially cylindrical shape.
The insertion connection portion 36c has an elastic piece 36d for elastically holding the connection piece 14 inserted therein,
The elastic piece 36d is bent and formed such that the side into which the connecting piece 14 is inserted is expanded. In addition, such a female terminal 36 is formed by punching and bending one sheet material into a predetermined shape.

When the cover member 13 and the gear housing 21 (reduction unit 3) are assembled, the connection piece 14 is inserted into the female terminal 36, and they are electrically connected to each other. At this time, even if the connection piece 14 is displaced in the vertical direction from the predetermined position due to dimensional variation, the insertion side of the insertion connection portion 36c is expanded, so that the insertion can be easily performed. In addition, since the dimensional deviation of the connection piece 14 can be absorbed by the elastic deformation of the leaf spring portion 36b, the deformation of the connection piece 14 is prevented.
Further, the female terminal 36 and the connecting piece 14 are reliably brought into conduction by the elastic force of the elastic piece 36d.

As shown in FIGS. 1 to 3, the control circuit board 31 is provided with a pair of Hall elements 37 at a position facing the outer peripheral surface of the sensor magnet 23. The Hall element 37 detects a change in the magnetic field of the sensor magnet 23 that rotates together with the rotating shaft 7 and outputs a detection signal to the control circuit 32. The control circuit 32 includes a Hall element 37
The rotation information such as the number of rotations and the rotation speed of the rotating shaft 7 is detected based on the detection signal from. The control circuit 32 supplies a drive current based on a control signal input from the vehicle side via the connector section 21g and the rotation information to the brush 11 from the female terminal 36 via the connection piece 14, and controls the motor section 2 When driven, the window regulator performs a predetermined operation.

As described above, the present embodiment has the following effects. (1) The lid member 13 is provided at predetermined positions with the communication holes 13c and 13d.
The seal member 15 is integrally formed with the lid member 13 so as to be engaged with the engagement portion, and the yoke housing 4 and the gear housing 21 are provided. The two openings 4c and 21e are closed. Therefore, since the seal member 15 is formed integrally with the lid member 13, the seal member 15 can be easily fixed without the need to fix the seal member 15 to the lid member 13. In addition, the sealing member 15 is
The seal member 15 can be securely fixed to the lid member 13 because the seal member 15 is locked with the lock portion provided in the cover member 13.

(2) Since the communication holes 13 c to 13 e for locking with the seal member 15 are provided at a plurality of locations along the periphery of the lid member 13, the seal member 15 is securely fixed to the lid member 13. be able to.

(3) The cover member 13 has a communication hole 13e filled with a part of the seal member 15, and an embedded portion provided in the hole 13e and embedded in the seal member 15 filled in the hole 13e. 13f is formed, and the seal member 15 filled in the hole 13e is locked to the embedded portion 13f, so that the seal member 15 is securely fixed to the lid member 13. In this way, a means for locking the seal member 15 with respect to the lid member 13 can be simply configured.

(4) The cover member 13 is formed with communication holes 13c and 13d for communicating the one side surface 13x and the other side surface 13y, and the seal member 15 and the other side surface 13y formed on one side surface 13x of the cover member 13 are formed. The seal member 15 to be molded is connected via the communication holes 13c and 13d so that the seal member 15 is securely fixed to the lid member 13.
In this way, the sealing member 15 is
Can be simply configured.

(5) The lid member 13 covers the same opening 21e as the rotating shaft housing 21a for housing the rotating shaft 7 and the board housing 21d for housing the control circuit board 31.
Therefore, since the lid member 13 can be shared by both the accommodating portions 21a and 21d, the number of parts can be reduced.

The embodiment of the present invention may be modified as follows. The shapes of the lid member 13 and the seal member 15 formed integrally with the lid member 13 in the above embodiment are not limited to these. Further, in order to securely fix the seal member 15 to the lid member 13, the communication holes 13 c and 1
Although the communication hole 13e having the 3d and the buried portion 13f is formed, the present invention is not limited to this configuration, and for example, a notch or a projection may be appropriately changed. In addition, the communication holes 13c-1
The position where 3e is provided may be changed as appropriate.

In the above embodiment, the seal member 15 is formed of an elastomer resin, but may be formed of another elastic resin. The shape of the gear housing 21 of the above embodiment is not limited to this. For example, the rotating shaft housing 21a
And the opening 21e which is the same as the substrate housing 21d, but each of the housings 21a, 21
1d may be formed. In this case, it is necessary to appropriately change the shape of the lid member 13.

The yoke housing 4 (motor unit 2) of the above embodiment may be cylindrical. -The clutch 22 of the above embodiment may be omitted. In this case, the rotating shaft 7 and the worm shaft 24 may be integrated.

In the above embodiment, the speed reduction mechanism is constituted by the worm 24a and the worm wheel 26, but may be constituted by using other reduction gears. In the above embodiment, the hall element 37 and the sensor magnet 23 serve as rotation detecting means for detecting the rotation of the rotating shaft 7.
However, a magnetoresistive element may be used instead of the Hall element 37. Further, detection means other than the magnetic detection type may be used.

In the above embodiment, the female terminal 3
6. Although the male terminal (connection piece 14) on the motor unit 2 side was used,
A male terminal may be used on the substrate 31 side, and a female terminal may be used on the motor section 2 side.

In the above embodiment, the terminal 35 is inserted into and held by the connector base 33, but the terminal 35 may be inserted into the connector base 33. In the above embodiment, the motor 1 is used as a drive source of the vehicle power window device, but may be a drive source of another device.

[0049]

As described in detail above, according to the present invention,
A motor having a seal member between an opening of a housing accommodating portion of a housing and a lid member closing the opening, and the fixing of the seal member to the lid member can be made simple and reliable.

[Brief description of the drawings]

FIG. 1 is a plan view of a motor according to an embodiment.

FIG. 2 is an exploded plan view of the motor.

FIG. 3 is an exploded view of the motor as viewed from a direction A in FIG. 1;

FIG. 4 is a view for explaining a surface of a cover member on a gear housing side.

FIG. 5 is a view for explaining a lid member before integrally forming a seal member.

6A is a cross-sectional view taken along the line BB of FIG. 5, and FIG.
5C is a cross-sectional view taken along line CC, FIG. 5C is a cross-sectional view taken along line DD in FIG.
FIG. 6 is an EE cross-sectional view of FIG. 5.

7A is a sectional view taken along the line BB of FIG. 3, and FIG.
3C is a cross-sectional view taken along the line CC, FIG. 3C is a cross-sectional view taken along the line DD in FIG.
FIG. 4 is an EE cross-sectional view of FIG. 3.

FIG. 8 is a sectional view taken along line FF of FIG. 1;

FIG. 9 is an enlarged sectional view of a female terminal.

FIG. 10 is a rear view of the connector base.

[Explanation of symbols]

2 ... motor section, 3 ... reduction section, 4 ... yoke housing, 4
c: opening, 7: rotating shaft, 13: lid member, 13c to 13c
e: communication hole forming a locking portion, 13f: embedded portion forming a locking portion, 15: seal member, 21: gear housing,
21a: rotating shaft housing as housing, 21d ... substrate housing as housing, 21e ... opening, 24 ... worm shaft forming reduction gear, 26 ... worm wheel as reduction gear forming reduction gear, 31 ... Control circuit board.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J040 BA04 EA16 FA06 HA02 HA05 HA21 5H605 AA08 BB05 CC02 CC03 CC08 EB06 EC05 EC07 EC08 EC12 EC20 GG06 5H607 AA12 BB01 BB07 BB14 CC03 CC07 DD09 DD19 EE32 EE36 GG04 GG09 JJ05

Claims (6)

[Claims] A motor unit for rotating a rotating shaft, a speed reducing mechanism for reducing the rotation of the rotating shaft, and a speed reducing unit having a gear housing for accommodating a control circuit board for controlling the rotation of the motor unit are provided. What is claimed is: 1. A motor comprising a cover member integrally assembled and closing an opening of a housing portion of the gear housing, wherein the cover member has a locking portion at a predetermined position and is locked with the locking portion. And a sealing member formed of an elastic resin integrally formed with the lid member to seal the opening. 2. A motor unit having a yoke housing rotatably housing a rotation shaft, a reduction mechanism for reducing the rotation of the rotation shaft, and a gear housing a control circuit board for controlling the rotation of the motor unit. A speed reducer having a housing is integrally assembled with the gear housing, and a cover member having a portion interposed between the opening and the opening of the yoke housing is provided, while closing an opening of the housing of the gear housing. The lid member has a locking portion at a predetermined position, and is formed integrally with the lid member so as to lock with the locking portion, and the two opening portions are elastically closed. A motor comprising a sealing member made of resin. 3. The motor according to claim 1, wherein the locking portion is provided at a plurality of positions along a periphery of the lid member. 4. The motor according to claim 1, wherein the locking portion is provided in a hole filled with a part of the seal member, and is provided in the hole to fill the hole. And a buried portion buried in the sealing member. 5. The motor according to claim 1, wherein the locking portion is a communication hole that communicates one side surface and the other side surface of the lid member. A motor characterized in that the seal member formed on the side surface and the seal member formed on the other side surface are connected through the communication hole. 6. The motor according to claim 1, wherein the gear housing is the same as a rotating shaft housing that houses the rotating shaft and a board housing that houses the control circuit board. A motor having an opening, wherein the lid member closes the opening.