JP2005151698A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure the sealing performance between an opening part and a lid member and to prevent the looseness of a circuit substrate even if dimensional errors occur in either the approaching direction and the separating direction of the circuit substrate and the lid member in a motor with a constitution in which the opening part is closed with the lid member after storing the circuit substrate from the opening part of a gear housing. <P>SOLUTION: The circuit substrate 31 is inserted and stored into a substrate storage part 21b from the opening part 21a of the gear housing 21 along a guide groove 21c. The lid member 13 is assembled to the gear housing 21 so as to close the opening part 21a. The lid member 13 has a contact projecting part 13a for being brought into contact with the circuit substrate 31. The contact projecting part 13a has a slant face 13b inclined to the insertion direction of the circuit substrate 31 so as to oppose to the circuit substrate 31. The movement of the circuit substrate 31 to the anti-insertion side is regulated by the slant face 13b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a motor in which a circuit board is built in a gear housing that houses a speed reduction mechanism.

  A motor with a speed reduction mechanism is generally used as a drive source of a vehicle power window device, and a motor in which a control circuit board is built in a gear housing that houses the speed reduction mechanism is known (for example, Patent Document 1). reference).

The gear housing of the motor has an opening portion that opens toward the motor portion side, and the substrate housing for inserting and accommodating the circuit board from the opening portion along the guide groove that guides along the axial direction of the motor portion Department. On the other hand, a brush holder is fitted into the opening of the yoke housing constituting the motor unit, and a lid member for closing the opening of the gear housing is formed integrally with the brush holder. The yoke housing is fixed to the gear housing with a screw, and the opening of the gear housing is closed with a lid member by the tightening force of the screw, and the surface (bottom surface) of the lid member and the substrate housing portion on the side opposite to the opening. The circuit board is held in the board housing portion by sandwiching the circuit board in the axial direction.
JP 2002-262516 A

  However, in the above configuration, for example, when a dimensional error occurs in the direction in which the lid member is pushed up on the circuit board, the lid member may float from the opening of the gear housing. There arises a problem that a sufficient gap is not secured due to a gap between the two. Conversely, when a dimensional error occurs in the direction in which the circuit board and the lid member are separated from each other, the circuit board cannot be held between the lid member and the bottom surface of the board housing portion, and the circuit board rattles in the board housing portion. This causes a noise. For this reason, it is necessary to increase the dimensional accuracy of the parts related to them so that such dimensional errors do not occur, and the dimensional management is troublesome.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a circuit board in a motor having a configuration in which the circuit board is received from the opening of the gear housing and then the opening is closed with a lid member. A motor capable of ensuring the sealing property between the opening and the lid member and preventing the circuit board from shaking, regardless of whether a dimensional error occurs in the direction in which the lid member is close to or away from the lid member It is to provide.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a gear housing that is assembled integrally with the motor unit and accommodates a reduction mechanism that decelerates the rotation of the motor unit, and a circuit board is provided in the gear housing. In the built-in motor, the gear housing has a substrate housing portion that houses the circuit board by being inserted along the guide portion from the opening portion, and the gear housing has a lid member that closes the opening portion. The lid member has a contact portion for contacting the circuit board, and the contact portion is inclined with respect to the insertion direction of the circuit board so as to face the circuit board. The gist of the invention is that the circuit board has an inclined surface and movement of the circuit board to the non-insertion side is restricted by the inclined surface.

The invention according to claim 2 is the motor according to claim 1, wherein the inclined surface is formed of an elastic member.
According to a third aspect of the present invention, in the motor according to the second aspect, the lid member is integrally formed with a seal member that seals the opening, and the elastic member is the same as the seal member. The gist is that the same material is integrally formed with 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 circuit board has a first locking portion, and the board housing portion is the first locking portion. The gist of the present invention is to have a second locking portion that locks with the portion and prevents the circuit board from coming off to the non-insertion side.

  According to a fifth aspect of the present invention, in the motor according to any one of the first to fourth aspects, the opening of the gear housing opens toward the motor unit, and the circuit board is The gist is to be inserted from the opening along the axial direction of the motor unit.

  According to a sixth aspect of the present invention, in the motor according to any one of the first to fifth aspects, at least a part of the lid member is sandwiched and fixed between the motor portion and the gear housing. The gist of this is.

  A seventh aspect of the present invention is the motor according to any one of the first to sixth aspects, wherein the motor portion has a brush holder, and the brush holder is integrated with the lid member. The gist is that it is provided.

  According to an eighth aspect of the present invention, in the motor according to the seventh aspect, the lid member has a brush-side connector electrically connected to a brush held by the brush holder, and the circuit board is A substrate-side connector that is connected to the brush-side connector and supplies power to the brush from the substrate side, and when the lid member is attached to the gear housing, the brush-side connector and the substrate-side connector; The gist is to be connected.

  According to a ninth aspect of the present invention, in the motor according to the eighth aspect, the gear housing is provided with a connector guide portion for maintaining a connection state between the brush side connector and the board side connector. Is the gist.

(Function)
According to the first aspect of the present invention, the circuit board is inserted into the gear housing from the opening thereof into the board housing portion along the guide portion, and the lid member is assembled so as to close the opening. It is done. The lid member has a contact portion for contacting the circuit board, and the corresponding contact portion has a slope inclined with respect to the insertion direction of the circuit board so as to face the circuit board. Movement of the circuit board to the non-insert side is restricted. Therefore, even if a dimensional error occurs in the direction in which the circuit board and the lid member are close to each other (the direction in which the lid member is pushed up by the circuit board), the portion where the circuit board abuts is an inclined surface. The force that pushes up the member is kept small, and the lid member is prevented from floating from the opening of the gear housing. Therefore, the sealing performance between the opening and the lid member is ensured. In addition, since the portion where the circuit board abuts is a slope, even if a dimensional error occurs in either the direction in which the circuit board and the lid member are close or away from each other, the slope and the circuit board are in contact with each other. Since the contact is possible, the circuit board is pressed in the insertion direction at the inclined surface and pressed against the guide portion in a direction orthogonal to the insertion direction, and rattling of the circuit board is suppressed.

  According to the second aspect of the present invention, since the inclined surface with which the circuit board abuts is formed by the elastic member, the elastic member is elastically deformed, so that the lid member can be lifted and the circuit board can be more stable. It can be effectively prevented.

  According to the third aspect of the present invention, the lid member is integrally formed with the seal member that seals the opening of the gear housing, and the elastic member on the inclined surface of the contact portion is made of the same material as the seal member. It is integrally formed with the member. Therefore, since the seal member and the elastic member are made of the same material, an increase in the number of materials can be prevented, and the cover member can be easily formed simultaneously.

  According to the fourth aspect of the present invention, when the first locking portion provided on the circuit board and the second locking portion provided on the board housing portion are locked, the circuit board is pulled out to the non-insertion side. Is prevented. Therefore, since the circuit board can be temporarily fixed in the board housing portion in the open state until the lid member is attached to the opening of the gear housing, the circuit board falls off the board housing portion during the assembly of the motor. This prevents the motor from being assembled.

  According to the fifth aspect of the present invention, the opening of the gear housing opens toward the motor unit, and the circuit board is inserted from the opening along the axial direction of the motor unit. Therefore, a rotating shaft or the like extending from the motor portion can be accommodated in the opening, and the opening can be shared. Moreover, since the motor is generally assembled along the axial direction of the motor portion, that is, the rotating shaft of the motor portion, the assembly of the motor is improved by assembling the circuit board along the axial direction. .

  According to the invention described in claim 6, at least a part of the lid member is sandwiched and fixed between the motor portion and the gear housing. Therefore, the lid member can also be fixed by fixing the motor unit and the gear housing, so that means for fixing the lid member can be omitted or reduced.

According to the seventh aspect of the present invention, the brush holder is provided integrally with the lid member. Therefore, the number of parts can be reduced and the number of assembling steps can be omitted.
According to the invention described in claim 8, the lid member has the brush side connector electrically connected to the brush held by the brush holder, and the circuit board is connected to the brush side connector and connected to the brush side connector. A board-side connector that supplies power to the brush from the side is provided. When the lid member is attached to the gear housing, the brush side connector and the board side connector are connected. This facilitates electrical connection between the motor unit (brush) and the circuit board.

  According to the ninth aspect of the present invention, the gear housing is provided with the connector guide portion for maintaining the connection state between the brush side connector and the board side connector. For this reason, it is possible to prevent an excessive stress from acting on the connection portions of the terminals in both connectors, thereby preventing damage to the connection portions.

  According to the present invention, in the motor having a configuration in which the circuit board is accommodated from the opening of the gear housing and then the opening is closed by the lid member, either the direction in which the circuit board and the lid member are close or away from each other Even if a dimensional error occurs, it is possible to provide a motor that can ensure the sealing property between the opening and the lid member and prevent the circuit board from rattling.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a motor 1 with a speed reduction mechanism of the present embodiment. The motor 1 is used as a drive source for a vehicle power window device. The motor 1 is configured by integrally assembling a motor unit 2 and a speed reducing unit 3 that decelerates rotation of the motor unit 2.

  The motor unit 2 has a bottomed flat cylindrical yoke housing 4. The yoke housing 4 is made of a magnetic metal material, and a plurality of magnets 5 are fixed to a predetermined position on the inner surface thereof, and an armature 6 is rotatably accommodated inside the magnet 5. The armature 6 has a rotating shaft 7, and the base end portion of the rotating shaft 7 is rotatably supported by a bearing (not shown) provided at the bottom portion (end portion on the side of the anti-decelerating portion 3) of the yoke housing 4. . A commutator 8 is fixed to the tip end side (the speed reduction unit 3 side) of the rotating shaft 7.

  A brush holder 10 made of synthetic resin is fitted into the opening 4 a of the yoke housing 4. The brush holder 10 holds a pair of brushes 11 that are in sliding contact with the commutator 8. 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. The brush holder 10 is integrally formed on one side in the longitudinal direction of a lid member 13 having a substantially rectangular plate shape.

  The lid member 13 is interposed between the opening 4a of the yoke housing 4 and an opening 21a of the gear housing 21 described later, and closes both the openings 4a and 21a. As shown in FIGS. 3 and 4, a sealing member 14 made of an elastic material such as an elastomer resin is integrally formed on the lid member 13 by two-color molding. The seal member 14 is provided at a position that seals the opening 4 a of the yoke housing 4 and the opening 21 a of the gear housing 21. The seal member 14 prevents water from entering the opening 4 a of the yoke housing 4 and the opening 21 a of the gear housing 21. Further, since the lid member 13 seals the opening 4a of the yoke housing 4, the brush powder generated when the brush 11 is in sliding contact is prevented from scattering to the clutch 22 and the circuit board 31 in the gear housing 21, which will be described later. Is designed to prevent malfunctions.

  As shown in FIG. 1, such a lid member 13 is fitted into the opening 21 a of the gear housing 21 in a state where the integrally formed brush holder 10 portion is fitted into the yoke housing 4. The yoke housing 4 is fixed to the gear housing 21 by tightening a screw 15 on a nut 16 held by the gear housing 21 with the lid member 13 sandwiched between the yoke housing 4 and the gear housing 21. Further, the lid member 13 is tightened with a screw 15 on a nut 16 held by the gear housing 21 while being sandwiched between the gear housing 21 and the metal plate 17 at an end portion separated from the yoke housing 4. Fixed against.

  The speed reduction part 3 has a gear housing 21 made of synthetic resin. The gear housing 21 is formed in a predetermined shape so as to accommodate the tip of the rotating shaft 7, the clutch 22, the worm shaft 23, and the worm wheel 24. Further, the gear housing 21 has an opening 21 a for inserting the tip end portion of the rotating shaft 7 and the circuit board 31. The opening 21 a is closed by the lid member 13.

  The clutch 22 connects the rotary shaft 7 extending from the motor unit 2 and the worm shaft 23 coaxially. The clutch 22 is configured to transmit the rotational force from the rotary shaft 7 as it is to the worm shaft 23, while locking the rotation of the worm shaft 23 without transmitting the rotational force from the worm shaft 23 to the rotary shaft 7. . That is, the clutch 22 transmits the rotational force of the rotating shaft 7 driven by the motor unit 2 to the worm shaft 23 to open / close the window glass, while external force (lower weight or vibration of the window glass) attempts to lower the window glass. Etc.), when the rotational force acts on the output shaft 26, the worm shaft 23 is locked, and the window glass is prevented from descending. A ring-shaped sensor magnet 25 for detecting the rotation of the rotary shaft 7 is attached to a portion of the clutch 22 connected to the rotary shaft 7.

  The worm shaft 23 is engaged with the worm wheel 24, and the worm shaft 23 and the worm wheel 24 constitute a speed reduction mechanism. At the center of the worm wheel 24, an output shaft 26 for drivingly connecting to a window regulator (not shown) of the power window device is provided so as to rotate integrally with the worm wheel 24. The rotation of the worm shaft 23 is decelerated through the worm wheel 24 and transmitted to the output shaft 26, so that the window regulator is activated.

  In the gear housing 21, a substrate housing portion 21 b is formed on the opposite side of the worm wheel 24 with the rotary shaft 7 interposed therebetween. As shown in FIG. 2, the board accommodating portion 21b communicates with the opening 21a, and a circuit board 31 that constitutes a control circuit for controlling the rotation of the motor 1 is accommodated in the board from the opening 21a. It is inserted and accommodated in the part 21b along the direction of the axis L1 of the rotating shaft 7.

  The circuit board 31 has a rectangular shape as a whole, and an extension portion in which a part of the rear end portion (end portion on the motor portion 2 side) in the insertion direction extends in a rectangular shape to a position near the sensor magnet 25. 31a. As shown in FIG. 1, the extending portion 31 a extends to a position overlapping the sensor magnet 25 when viewed from the direction of the axis L <b> 2 of the output shaft 26, and is not in contact with the outer peripheral surface of the sensor magnet 25. As shown in FIGS. 1 and 2, a pair of Hall elements 32 is disposed on the lower surface of the extending portion 31 a that faces the outer peripheral surface of the sensor magnet 25. The hall element 32 detects a change in the magnetic field of the sensor magnet 25 that rotates together with the rotating shaft 7, and based on the detection signal, rotation information such as the number of rotations and the rotation speed of the rotating shaft 7 is detected. Used for control 2). In addition to the Hall element 32, a plurality of circuit components (not shown) are mounted on the circuit board 31.

  Here, as shown in FIG. 1, FIG. 2 and FIG. 4, guide grooves 21c serving as guide portions for guiding both side portions of the circuit board 31 in the insertion direction are formed in the predetermined direction of the board accommodating portion 21b. Axis line L1 direction). The circuit board 31 is inserted into the board accommodating part 21b from the opening 21a along the guide groove 21c, and the movement of the circuit board 31 in the thickness direction is prevented.

  As shown in FIG. 4, the circuit board 31 is formed with a locking hole 31b as a first locking portion at a predetermined position. On the other hand, a locking projection 21d as a second locking portion that is inserted into the locking hole 31b and locks with the circuit board 31 in the opposite insertion direction is erected on the board housing portion 21b. When the circuit board 31 is inserted into the board housing portion 21b, the circuit board 31 is inserted along the guide groove 21c over the locking projection 21d and comes into contact with the bottom surface 21e of the board housing portion 21b. When the predetermined position is reached, the locking projection 21d is inserted into the locking hole 31b, and the circuit board 31 is prevented from coming off from the position to the non-insertion side. That is, when the locking hole 31b and the locking projection 21d are locked, the circuit board 31 is in an open state until the lid member 13 is mounted on the opening 21a of the gear housing 21. Temporarily fixed. In FIG. 4, since the lid member 13 is mounted on the gear housing 21 and the circuit board 31 is slightly pressed in the insertion direction, the locking between the locking hole 31b and the locking projection 21d is released. Is shown.

  Further, as shown in FIGS. 1 and 4, a connector main body 33 having a substantially rectangular parallelepiped shape is fixed to the lower surface of the front end portion of the circuit board 31 in the insertion direction (end portion on the side opposite to the motor portion 2) by screws 34. . The connector main body 33 holds a plurality of terminals 35 at predetermined positions. The base end portion 35a of each terminal 35 is electrically connected to the circuit board 31, and the tip end portion projects along the direction of the axis L1. On the other hand, the gear housing 21 is provided with a connector case portion 27 having a substantially rectangular tube shape having an insertion hole 27a for inserting the connector main body 33 therein. The connector case portion 27 is mounted such that the direction in which the insertion hole 27a extends faces the insertion direction of the circuit board 31 (the direction of the axis L1). Further, the gear housing 21 is formed with a communication hole 21 f that allows the board housing portion 21 b and the insertion hole 27 a of the connector case portion 27 to communicate with each other.

  When the circuit board 31 is inserted into the board housing part 21b along the guide groove 21c, the connector body 33 is inserted into the insertion hole 27a of the connector case part 27 through the communication hole 21f of the gear housing 21, The tip of each terminal 35 is exposed in the insertion hole 27a. In other words, the connector case portion 27 and the connector main body 33 constitute the connector portion 28 of the motor 1, and the connector portion 28 is connected to and electrically connected to the vehicle-side connector extending from the vehicle side. Drive power is supplied from the vehicle side and control signals are exchanged with the vehicle side. Incidentally, since the connector case portion 27 is structured to be attached to the gear housing 21, it can be easily handled by attaching the connector case portion 27 corresponding to the shape of the vehicle side connector as the shape of the vehicle side connector is changed. It is possible.

  Further, as shown in FIG. 2, a board-side connector 36 having a pair of female terminals 36 a is provided on the lower surface of the rear end part (end part on the motor part 2 side) of the circuit board 31 in the insertion direction. On the other hand, as shown in FIG. 3, a brush-side connector 18 having a pair of male terminals 18a electrically connected to the brush 11 is provided on the surface of the lid member 13 on the gear housing 21 side. Is provided. When the lid member 13 is mounted on the gear housing 21 when the motor 1 is assembled, the board-side connector 36 and the brush-side connector 18 are connected to each other, and the male terminal 18a is fitted into the female terminal 36a. Both terminals 18a, 36a are electrically connected. That is, the circuit board 31 and the brush 11 are electrically connected to each other, and driving power is supplied from the circuit board 31 to the brush 11.

  Incidentally, the board-side connector 36 and the brush-side connector 18 are respectively formed with connecting convex portions 36b, 18b having a T-shaped cross section and extending in the direction of the axis L1. On the other hand, the board accommodating portion 21b is formed with a connecting groove 21g as a connector guide portion having a T-shaped cross section and extending in the direction of the axis L1. When the circuit board 31 is accommodated in the substrate accommodating portion 21b, the coupling convex portion 36b of the substrate side connector 36 is fitted into the coupling groove 21g, and then when the lid member 13 is fixed to the gear housing 21, the brush side The connector 18 is inserted. Thereby, the connection state of the board | substrate side connector 36 and the brush side connector 18 is maintained. Therefore, an excessive stress is prevented from acting on the connection portion of the female terminal 36a and the male terminal 18a, thereby preventing the connection portion from being damaged.

  And after accommodating the circuit board 31 in the board | substrate accommodating part 21b, the said cover member 13 is mounted | worn with the opening part 21a of the gear housing 21, is fixed with the said motor part 2 (yoke housing 4), and this opening part 21a The lid member 13 is closed. In this case, as shown in FIG. 1, the circuit board 31 abuts against the abutment convex portion 13a as an abutment portion standing on the surface of the lid member 13 on the gear housing 21 side, and other portions are the The lid member 13 has a predetermined gap S so as not to come into contact with the main body.

  As shown in FIG. 4, the contact protrusion 13 a is provided at a position offset to the lower surface side of the circuit board 31 and protrudes from the lid member 13 beyond the gap S. A side surface of the abutment convex portion 13a facing the circuit board 31 is a slope 13b that gradually inclines in a direction approaching the circuit substrate 31 from the distal end to the proximal end of the convex portion 13a with respect to the insertion direction of the substrate 31. It has become. When the lid member 13 is attached to the gear housing 21, the rear end portion (the end portion on the motor unit 2 side) of the circuit board 31 is brought into contact with the inclined surface 13 b. Further, the abutting convex portion 13a is covered with an elastic member 14a on the side surface opposite to the inclined surface 13b, the tip surface and the inclined surface 13b. The elastic member 14 a is formed on the lid member 13 at the same time using the same material as the seal member 14 formed integrally with the lid member 13. Furthermore, even if a dimensional error occurs in either the direction in which the circuit board 31 and the lid member 13 are close to each other or the direction in which the cover member 13 is separated, the circuit board 31 is reliably attached to any one of the inclined surfaces 13b of the contact convex portion 13a. It comes to contact. That is, the dimension of the contact protrusion 13a is set in consideration of the dimension error.

  When the lid member 13 is attached to the gear housing 21, the rear end portion (the end portion on the motor unit 2 side) of the circuit board 31 is brought into contact with the inclined surface 13b of the abutting convex portion 13a. The circuit board 31 is pressed in the insertion direction to be pressed against the bottom surface 21e of the board housing portion 21b, and is pressed against the upper inner surface (surface orthogonal to the insertion direction) of the guide groove 21c. Thereby, since the movement of the circuit board 31 is restricted in any direction, rattling of the circuit board 31 is prevented. Moreover, even if a dimensional error occurs in the direction in which the circuit board 31 and the lid member 13 are close to each other (the direction in which the lid member 13 is pushed up by the circuit board 31), the portion with which the circuit board 31 abuts is the slope 13b. The force that pushes up the lid member 13 on the circuit board 31 is kept small, and the lid member 13 is prevented from floating from the opening 21 a of the gear housing 21. Further, since the slope 13b is covered with the elastic member 14a, the elastic member 14a is elastically deformed so that the floating of the lid member 13 and the rattling of the circuit board 31 are more effectively prevented. It has become.

Next, characteristic effects of the present embodiment will be described.
(1) In the gear housing 21, the circuit board 31 is inserted and accommodated along the guide groove 21c into the board accommodating portion 21b from the opening 21a, and the lid member 13 is assembled so as to close the opening 21a. It is done. The lid member 13 has a contact protrusion 13 a for contacting the circuit board 31, and the contact protrusion 13 a is a slope inclined with respect to the insertion direction of the circuit board 31 so as to face the circuit board 31. 13b, and the slope 13b restricts the movement of the circuit board 31 to the non-insertion side. Therefore, even if a dimensional error occurs in the direction in which the circuit board 31 and the lid member 13 are close to each other (the direction in which the lid member 13 is pushed up by the circuit board 31), the portion with which the circuit board 31 abuts is the slope 13b. The force that pushes up the lid member 13 on the circuit board 31 is kept small, and the lid member 13 is prevented from floating from the opening 21 a of the gear housing 21. Therefore, the sealing performance between the opening 21a and the lid member 13 can be ensured. In addition, since the portion where the circuit board 31 abuts is a slope 13b, even if a dimensional error occurs in either the direction in which the circuit board 31 and the lid member 13 are close or away from each other, the slope 13b and the Since the circuit board 31 can come into contact with the circuit board 31, the circuit board 31 is pressed in the insertion direction by the inclined surface 13 b and pressed against the guide groove 21 c in a direction orthogonal to the insertion direction. The rattling can be suppressed.

  (2) Since the inclined surface 13b with which the circuit board 31 abuts is covered with the elastic member 14a, the elastic member 14a is elastically deformed, so that the lifting of the lid member 13 and the rattling of the circuit board 31 are more effective. Can be prevented.

  (3) The lid member 13 is integrally formed with a seal member 14 that seals the opening 21 a of the gear housing 21, and the elastic member 14 a on the inclined surface 13 b of the contact convex portion 13 a is made of the same material as the seal member 14. The lid member 13 is integrally formed. Therefore, since the sealing member 14 and the elastic member 14a are made of the same material, an increase in the number of materials can be prevented, and the lid member 13 can be easily formed simultaneously.

  (4) Since the locking hole 31b provided in the circuit board 31 and the locking projection 21d provided in the board housing portion 21b are locked, the circuit board 31 is prevented from coming off to the non-insertion side. Therefore, the circuit board 31 can be temporarily fixed in the board housing part 21b in the open state of the opening part 21a until the cover member 13 is mounted on the opening part 21a of the gear housing 21, so that the circuit during the assembly of the motor 1 is possible. The board 31 can be prevented from falling off the board housing portion 21b, and the assembling property of the motor 1 can be improved.

  (5) The opening 21a of the gear housing 21 opens toward the motor unit 2 side, and the circuit board 31 is inserted along the axis L1 direction of the motor unit 2 from the opening 21a. Therefore, the rotary shaft 7 and the like extending from the motor unit 2 is also accommodated in the opening 21a, and since the opening 21a is shared, the numerical aperture can be reduced, and the lid that closes the opening accordingly. The number of members can also be reduced. Moreover, since the motor 1 is assembled along the direction of the axis L1 of the motor unit 2, that is, the rotating shaft 7 of the motor unit 2, the circuit board 31 is also assembled along the direction of the axis L1. Adhesiveness can be improved.

  (6) The lid member 13 is partly clamped and fixed between the motor unit 2 and the gear housing 21. Therefore, the lid member 13 can also be fixed by fixing the motor unit 2 and the gear housing 21, so that means (screw 15, nut 16) for fixing the lid member 13 can be reduced.

(7) The brush holder 10 is integrally provided on the lid member 13. Therefore, the number of parts can be reduced and the number of assembling steps can be omitted.
(8) The lid member 13 has a brush-side connector 18 electrically connected to the brush 11 held by the brush holder 10, and the circuit board 31 is connected to the brush-side connector 18 and is on the side of the board 31. A board-side connector 36 that supplies power to the brush 11 is provided. When the lid member 13 is attached to the gear housing 21, the brush side connector 18 and the board side connector 36 are connected. Therefore, electrical connection between the motor unit 2 (brush 11) and the circuit board 31 can be facilitated.

  (9) In the gear housing 21, in order to maintain the connection state between the brush side connector 18 and the board side connector 36, the connection convex part 18 b provided on the brush side connector 18 and the connection convex part 36 b provided on the board side connector 36. Are provided with connecting grooves 21g that are inserted and connected together. Therefore, it is possible to prevent an excessive stress from acting on the connection portions of the terminals 18a and 36a in both the connectors 18 and 36, and to prevent damage to the connection portions.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the inclined surface 13b of the contact protrusion 13a is covered with the elastic member 14a, but the contact protrusion 13a itself may be formed of the elastic member 14a. Alternatively, the inclined surface 13b of the contact protrusion 13a may be directly contacted with the circuit board 31 without being covered with the elastic member 14a. Moreover, you may change the shape of the contact convex part 13a suitably.

  In the above embodiment, the opening 21a of the gear housing 21 is shared by the opening that accommodates the tip of the rotating shaft 7 and the opening that accommodates the circuit board 31, but each opening is provided independently. Also good.

In the above embodiment, the circuit board 31 is inserted along the direction of the axis L1, but the insertion direction of the circuit board 31 is not limited to this.
In the above embodiment, the circuit board 31 is temporarily fixed by locking the locking holes 31b provided in the circuit board 31 and the locking protrusions 21d provided in the board housing portion 21b. It is not limited to this. For example, a locking protrusion may be provided on the circuit board 31 side, and a locking hole or a locking recess that locks the protrusion may be provided on the board housing portion 21b side. Further, the protrusions may be mutually formed. Further, the means for temporarily fixing may be omitted.

  In the above embodiment, the gear housing 21 is provided with the connecting groove 21g to be connected by fitting together the connecting convex portion 18b provided on the brush side connector 18 and the connecting convex portion 36b provided on the board side connector 36. However, the means for maintaining the connection state of the connectors 18 and 36 is not limited to this. For example, a connecting groove may be provided on the connectors 18 and 36 side, and a connecting convex portion may be provided on the gear housing 21 side. Further, instead of the connecting convex portion 18b of the brush-side connector 18, a connecting convex portion is provided at a position away from the connector 18, and is inserted into a connecting groove (connecting hole) provided at a position corresponding to the connecting convex portion. Also good. Further, the means for maintaining the connected state may be omitted.

  In the above embodiment, the connector case portion 27 constituting the connector portion 28 is mounted on the gear housing 21. However, the connector case portion 27 may be formed integrally with the gear housing 21.

In the above embodiment, the present invention is applied to the motor 1 used as a drive source of the vehicle power window device, but may be applied to a motor used in other devices.
The technical idea that can be grasped from each of the above embodiments will be described below.

  (A) In the motor according to any one of claims 1 to 9, the contact portion may have a dimensional error in any of a direction in which the circuit board and the lid member are close to each other and a direction in which the circuit board is separated. The motor is characterized in that the dimension is set so that the inclined surface of the contact portion and the circuit board come into contact with each other. Thereby, even if a dimensional error arises, the slope of a contact part and a circuit board can be made to contact reliably.

FIG. 3 is a plan sectional view of the motor according to the present embodiment. The figure for demonstrating the inside of the opening part of a gear housing. The figure for demonstrating the surface by the side of the gear housing of a cover member. AA sectional drawing of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Motor part, 10 ... Brush holder, 11 ... Brush, 13 ... Cover member, 13a ... Contact convex part as contact part, 13b ... Slope, 14 ... Seal member, 14a ... Elastic member, 18 ... Brush side connector , 21 ... gear housing, 21a ... opening, 21b ... substrate housing part, 21c ... guide groove as guide part, 21d ... locking projection as second locking part, 21g ... connection groove as connector guide part, 23 ... Worm shaft constituting the speed reduction mechanism, 24 ... Worm wheel constituting the speed reduction mechanism, 31 ... Circuit board, 31b ... Locking hole as the first locking portion, 36 ... Board side connector, L1 ... Axis.

Claims (9)

In a motor that is assembled integrally with a motor unit and includes a gear housing that houses a reduction mechanism that decelerates rotation of the motor unit, and a circuit board is built in the gear housing,
The gear housing has a substrate housing portion that accommodates the circuit board inserted through the guide portion along the guide portion, and a lid member that closes the opening portion is assembled to the gear housing. ,
The lid member has a contact portion for contacting the circuit board, and the contact portion has a slope inclined with respect to the insertion direction of the circuit board so as to face the circuit board, A motor characterized in that movement of the circuit board to the non-insertion side is restricted by an inclined surface. The motor according to claim 1,
The motor is characterized in that the slope is formed of an elastic member. The motor according to claim 2,
The lid member is integrally formed with a seal member that seals the opening,
The motor is characterized in that the elastic member is integrally formed with the lid member using the same material as the seal member. The motor according to any one of claims 1 to 3,
The circuit board has a first locking portion,
The motor according to claim 1, wherein the board housing part has a second locking part that locks with the first locking part to prevent the circuit board from coming off to the non-insertion side. The motor according to any one of claims 1 to 4,
The opening of the gear housing opens toward the motor unit side,
The circuit board is inserted from the opening along the axial direction of the motor unit. The motor according to any one of claims 1 to 5,
The motor, wherein at least a part of the lid member is sandwiched and fixed between the motor unit and the gear housing. The motor according to any one of claims 1 to 6,
The motor part has a brush holder,
The motor, wherein the lid member is integrally provided with the brush holder. The motor according to claim 7, wherein
The lid member has a brush-side connector electrically connected to a brush held by the brush holder,
The circuit board has a board-side connector that is connected to the brush-side connector and supplies power to the brush from the board side,
The motor, wherein the brush-side connector and the board-side connector are connected when the lid member is attached to the gear housing. The motor according to claim 8, wherein
The motor is characterized in that the gear housing is provided with a connector guide portion for maintaining a connection state between the brush side connector and the board side connector.

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