JP2001251808A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized motor. SOLUTION: This motor 1 is structured by inclining a connector portion 26 provided with a circuit board 28 for an axis accommodating portion 14 (rotary shaft 5) and inserting, from a deceleration housing 12 toward a yoke housing 4, this connector portion 26 into an extending portion 16 from the end part side of circuit board 28 providing a Hall element 29, so that the end portion of the circuit board 28, including the Hall element 29, can be allocated in the more circuit board end (the bottom side of yoke housing 4) of the rotating shaft 5, in comparison with the case where the connector portion 26 is inserted in the direction orthogonal to the shaft accommodating portion 14 (rotating shaft 15). As a result, a sensor magnet 11 can be provided in the circuit board end portion side of the rotating shat 5, the therefore the length of rotating shaft 5 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor provided with a rotation sensor comprising a detection object fixed to a rotating shaft and a rotation detecting element for detecting the rotation of the detection object.

[0002]

2. Description of the Related Art Conventionally, a power window device for a vehicle is provided with a motor having a speed reduction mechanism as a driving source thereof. In such a motor with a speed reduction mechanism, there is a motor in which a rotation sensor for detecting the rotation direction and the number of rotations of the motor is integrally assembled in order to detect the open / close position of the window glass.

[0003]

Incidentally, the motor with a speed reduction mechanism described above tends to be large in size because it has many components such as a speed reduction mechanism and a rotation sensor. However,
The space for mounting the power window device for vehicles is always required to be space-saving, and it is necessary to reduce the size of the motor that is the drive source of the device.

[0004] The present invention has been made to solve the above problems, and an object of the present invention is to provide a motor that can be downsized.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is directed to a portion which is rotatably supported by a bottomed cylindrical yoke housing and is located on an opening side of the housing. A motor unit having a rotating shaft to which the object to be detected is fixed, a reduction unit having a reduction housing assembled to an opening of the yoke housing, and a reduction mechanism for housing a reduction mechanism for reducing the rotation of the rotation shaft in the housing; A support provided at a distal end thereof such that a rotation detecting element for detecting the rotation of the object to be detected is disposed at a position near the object to be detected in order to detect the rotation of the rotation shaft; Body
It was inclined with respect to the rotation axis, and was inserted into the deceleration housing from the deceleration housing toward the yoke housing from the tip end side.

According to a second aspect of the present invention, in the motor according to the first aspect, the support is inserted and installed so as to be parallel to a longitudinal direction of the two housings further assembled to each other.

[0007] The invention described in claim 3 is the first or second invention.
The motor according to claim 1, further comprising a connector having a terminal, the connector being inserted into the deceleration housing in the same direction as the support, and a rotation detection element provided on the support being electrically connected to the terminal. At the same time, the support was integrally assembled with the connector part.

According to a fourth aspect of the present invention, in the motor according to the third aspect, the connector further includes a connection piece for electrically connecting to a power supply terminal extending from the motor. The deceleration housing has an insertion hole into which the connection piece is inserted and guides the connection piece to the power supply terminal, and an insertion-side opening of the insertion hole into which the connection piece is inserted. And a guide portion for guiding the connection piece into the insertion hole.

According to a fifth aspect of the present invention, in the motor according to the fourth aspect, one of the power supply terminal and the connection piece is provided with a holding portion, and the other is provided with an insertion portion inserted into the holding portion. At least one of the holding portion and the insertion portion is provided with a guide portion for guiding the insertion portion into the holding portion.

According to a sixth aspect of the present invention, in the motor according to any one of the first to fifth aspects, the deceleration housing is provided with a guide portion for guiding the support to a predetermined position.

According to a seventh aspect of the present invention, in the motor according to any one of the first to sixth aspects, the rotation detecting element is arranged so as to face an outer peripheral surface of the object to be detected. Therefore, according to the first aspect of the present invention, the motor section is rotatably supported by the cylindrical yoke housing, and has the rotating shaft having the detection target fixed to a portion located on the opening side of the housing. are doing. The speed reduction unit has a speed reduction housing assembled to the opening of the yoke housing, and accommodates a speed reduction mechanism for reducing the rotation of the rotating shaft in the housing. The support is provided at the distal end so that a rotation detecting element for detecting the rotation of the object to be detected is arranged at a position near the object to be detected in order to detect the rotation of the rotation shaft. And such a support is inclined with respect to the rotation axis of the motor unit,
From the deceleration housing toward the yoke housing, it is inserted into the deceleration housing from the tip end side. In this case, for example, as compared with a case where the support is inserted in a direction orthogonal to the rotation axis, the tip end of the support provided with the rotation detecting element is positioned closer to the base end side of the rotation shaft (the yoke housing). (The bottom side), the object to be detected can be provided closer to the base end side of the rotating shaft. for that reason,
The rotation shaft can be shortened, and the size of the motor in the axial direction can be reduced.

According to the second aspect of the present invention, the support is further inserted so as to be parallel to the longitudinal direction of the two housings assembled together. Therefore, the thickness of the two housings in the longitudinal direction, that is, the direction perpendicular to the longitudinal direction of the motor can be reduced.

According to the third aspect of the present invention, the rotation detecting element provided on the support is electrically connected to the terminal at the connector portion inserted into the deceleration housing in the same direction as the support. And the support is integrally assembled. Therefore, the support can be easily attached to the reduction housing.

According to the fourth aspect of the present invention, the connector section further includes a terminal having a connection piece for electrically connecting to a power supply terminal extending from the motor section. The connection piece is inserted and has an insertion hole for guiding the connection piece to the power supply terminal. A guide for guiding the connection piece into the insertion hole is provided at the insertion-side opening for inserting the connection piece of the insertion hole. Accordingly, the connection piece can be easily inserted into the insertion hole by the guide portion, and the connection piece can be guided to the power supply terminal. Therefore, the electrical connection between the connection piece and the power supply terminal can be easily performed. it can.

According to the fifth aspect of the present invention, one of the power supply terminal and the connection piece is provided with a holding portion, and the other is provided with an insertion portion to be inserted into the holding portion, and at least one of the holding portion and the insertion portion is provided. Is provided with a guide portion for guiding the insertion portion into the holding portion. Therefore, by this guide,
Electrical connection between the connection piece and the power supply terminal can be more easily performed.

According to the invention described in claim 6, the deceleration housing is provided with a guide portion for guiding the support to a predetermined position. Therefore, the support can easily arrange the support at a predetermined position, that is, the rotation detecting element provided on the support at a position suitable for detecting the rotation of the object to be detected.

According to the present invention, the rotation detecting element is disposed so as to face the outer peripheral surface of the detection target. Therefore, even if the object to be detected moves in the same direction due to backlash in the axial direction of the rotation shaft, as compared to a case where the rotation detection element is arranged to face one end surface of the object to be detected,
The distance between the object to be detected and the rotation detecting element does not change significantly.
Therefore, the adverse effect on the rotation detection due to the movement of the detection target can be reduced.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a motor 1 with a speed reduction mechanism of the present embodiment. In this embodiment, the motor 1 with a speed reduction mechanism is used as a drive source of a vehicle power window device (not shown).
The motor 1 with a speed reduction mechanism includes a motor unit 2 and a speed reduction unit 3. The motor unit 2 includes a yoke housing 4, a rotor 7 having a rotating shaft 5 and a commutator 6, a magnet 8, and the like.

The yoke housing 4 is formed in a flat cylindrical shape with a bottom, and a magnet 8 is fixed to an inner surface thereof.
A bearing 9 is provided at the bottom of the yoke housing 4.
The base end (the right end in FIGS. 2 and 3) of the rotating shaft 5 is rotatably supported by the bearing 9.

An armature 10 is fixed to the rotating shaft 5 so as to face the magnet 8, and a commutator 6 is fixed to a tip end of the armature 10. The commutator 6 of the rotating shaft 5
A disk-shaped sensor magnet 11 whose outer peripheral surface is multipolarly magnetized in the rotational direction is fixed to a portion slightly separated from the front end side. Further, a worm 5a is formed on the rotation shaft 5 on the tip side of the sensor magnet 11. Then, a reduction housing 12 made of resin is attached to the opening 4 a of the yoke housing 4 so as to cover the protruding rotation shaft 5.

The speed reduction housing 12 includes a connecting portion 13, a shaft receiving portion 14, a wheel receiving portion 15, and an extending portion 16. The connecting portion 13 is formed in a shape corresponding to the opening 4 a of the housing 4 for connecting to the yoke housing 4. A nut 17 is fixed to the connecting portion 13, and a plurality of screws 18 are screwed into the nut 17 via the yoke housing 4, thereby fixing the connecting portion 13 and the yoke housing 4.

A brush device 19 having brushes 19a and 19b slidingly contacting the commutator 6 is provided integrally with the connecting portion 13. The brush device 19 is accommodated in the opening 4a side of the yoke housing 4. . Also, this connecting portion 13
6 and 8, two power supply terminals 20 and 21 extending in the axial direction are inserted and supported in the terminal support holes 13a and 13b at a position near the brush device 19. Each power supply terminal 20, 21 is connected to a corresponding brush 19a, 19b via a pigtail (not shown). As shown in FIG. 9, forked ends 20a and 21a are formed at the distal ends of the power supply terminals 20 and 21, respectively.

As shown in FIGS. 2 and 3, the shaft receiving portion 14 is formed in a substantially bottomed cylindrical shape having an opening directed to the motor portion 2 for receiving the rotating shaft 5. Two bearings 22 and 23 are provided in the shaft accommodating portion 14, and the center and the tip (the left end in FIGS. 2 and 3) of the rotary shaft 5 are rotatably supported by the bearings 22 and 23. Is done. At this time, the worm 5a of the rotating shaft 5 is arranged between the two bearings 22 and 23. Further, a sensor magnet housing space 14 a for housing the sensor magnet 11 provided on the rotating shaft 5 is formed in the opening of the shaft housing 14.

The wheel accommodating portion 15 is formed in a predetermined shape capable of accommodating the worm wheel 24 and the like. The worm wheel 24 and the worm 5a constitute a speed reduction mechanism. In the wheel housing 15, the worm wheel 24 is disposed so as to be parallel to the plane portion 4b (see FIG. 1) of the yoke housing 4.
The thickness of the motor 1 is reduced. The worm wheel 24 meshes with the worm 5 a of the rotating shaft 5, and a rotational force is transmitted to the output shaft 25 connected to the wheel 24 in a direction orthogonal to the rotating shaft 5. The rotational force of the output shaft 25 is transmitted to a window regulator (not shown), and a window glass (not shown) opens and closes.

The extending portion 16 has a substantially quadrangular prism shape as shown in FIGS. 4 and 5, and is provided on the opposite side of the wheel housing 15 with respect to the shaft housing 14. As shown in FIGS. 2 and 3, the extension 16 has a central axis L
1 protrudes so as to be inclined at a predetermined angle (55 ° in the present embodiment) with respect to the center axis L2 of the shaft accommodating portion 14 (the rotating shaft 5). Moreover, the extending portion 16 extends so as to be parallel to the plane portion 4b of the yoke housing 4, that is, to become parallel to the longitudinal direction when the two housings 4 and 12 are assembled.

As shown in FIG. 4 and FIG.
6, locking projections 16a are formed on the left and right outer surfaces of the distal end. Also, on the tip end surface of the extension portion 16,
A fitting recess 16b is formed. This fitting recess 16b
On the bottom surface, a fitting hole 16c, a board guide groove 16d, an element insertion hole 16e, and two terminal insertion holes 16f, 1
6 g are provided.

The board guide groove 16d is connected to the fitting hole 16c, and the element insertion hole 16e is connected to the board guide groove 16d. The board guide groove 16d is formed wider in the left-right direction than the fitting hole 16c and the element insertion hole 16e. The fitting hole 16c, the board guide groove 16d, and the element insertion hole 16e are arranged near the upper inner surface of the fitting recess 16b. And
The fitting hole 16c, the board guide groove 16d, and the element insertion hole 16e extend along the central axis L1 of the extension 16, and the board guide groove 16d and the element insertion hole 16e extend to the sensor magnet housing space 14a.

On the other hand, the terminal insertion holes 16f and 16g are arranged near the lower inner surface of the fitting recess 16b. The terminal insertion holes 16f and 16g are aligned with the central axis L of the extension portion 16.
1, the power supply terminals 20, 2 shown in FIG.
1 extend to terminal support holes 13a and 13b for supporting the support holes 1a and 1b. The terminal insertion holes 16f and 16g are formed with tapered portions 16h and 16i, respectively, which expand toward the opening side. The tapered portions 16h and 16i are provided to guide the connection pieces 27b and 27c of the terminal 27 described later so that they can be easily inserted into the terminal insertion holes 16f and 16g. And the connector part 26 is inserted in the extension part 16 comprised in this way.

As shown in FIG. 7, the connector section 26 is provided on the connecting recess 26a and on the side opposite to the opening of the recess 26a.
A fitting portion 26 fitted with the fitting recess 16b of the extension portion 16
b, a fitting piece 26c provided on the fitting portion 26b and fitted in the fitting hole 16c, and a locking piece 26d provided on the outer surface of the coupling recess 26a and locked with the locking projection 16a And

Further, six terminals 27 are inserted into the connector portion 26, and the terminals 27 are respectively exposed in the connecting recesses 26a and are exposed on the side opposite to the opening of the recesses 26a. Terminal 27
The connection recess 26a is electrically connected to a terminal of the vehicle-side connector (not shown). On the side opposite to the opening of the connection recess 26a, four of the six terminals 27 have connection terminals 27a connected to wiring on a substrate 28 described later.
Are formed, and two of the six terminals 27 are formed with connection pieces 27b and 27c for connecting to the power supply terminals 20 and 21, respectively.

The connection pieces 27b, 27 of the terminal 27
c is the terminal insertion holes 16f, 16g shown in FIG.
Is guided by the tapered portions 16h and 16i. As shown in FIG. 9, the connection pieces 27b and 27c
Nipping parts 20a, 21 of the power supply terminals 20, 21
a and are electrically connected to the terminals 20 and 21. In this embodiment, the holding portions 20a, 21a
The tip portions 27d of the connection pieces 27b and 27c held by the
27e are formed with sword-shaped portions 27f and 27g, and holding portions 20a and 21a are guide portions 20b and 21b for guiding the tip portions 27d and 27e of the connection pieces 27b and 27c.
Are formed to facilitate mutual connection.

The fitting piece 26c of the connector 26 is inserted into the fitting hole 16c shown in FIG. The fitting hole 16c of the present embodiment is formed shorter in the axis L1 than the board guide groove 16d and the element insertion hole 16e. for that reason,
As shown in FIG. 4, the surface of the reduction housing 12 is correspondingly increased, in this case, the wheel housing 15 having the output shaft 25.
The vicinity can be depressed. Therefore, this output shaft 25
Is connected to the load-side device, so that interference with the load-side device can be reduced.

The base end side of the board 28 is fixed to the fitting piece 26c, and the board 28 is integrally assembled to the fitting piece 26c. Two Hall elements 29 are fixed to the lower surface of the distal end portion of the substrate 28 at a predetermined interval from each other. The Hall element 29 constitutes a rotation sensor together with the sensor magnet 11. The Hall element 29 is electrically connected to the terminal 27 via a connection terminal 27a exposed on the side opposite to the opening of the connection recess 26a via a wiring (not shown) on the substrate 28.

The substrate 28 is guided by the substrate guide groove 16d and inserted. At this time, the Hall element 29
When the substrate 28 is inserted, it does not collide with the extension 16 due to the element insertion hole 16e. Then, the substrate 28
Is guided to the substrate guide groove 16d, whereby each Hall element 29 is arranged at a predetermined position facing the outer peripheral surface of the sensor magnet 11. The Hall element 29 detects a change in the magnetic field due to the rotation of the sensor magnet 11 (rotary shaft 5), and outputs a detection signal based on the detection.

As shown in FIGS. 2 and 3, the connector 26 has a locking piece 26d having the locking protrusion 16a.
The extension 16 is inserted along the central axis L1 of the extension 16 until it is locked at a. That is, the extending portion 16 is
Since the connector portion 26 extends so as to be inclined with respect to the (rotation shaft 5) and parallel to the longitudinal direction of the two housings 4 and 12 assembled, the connector portion 26 extends along the direction in which the extension portion 16 extends. Inserted. As described above, the connector portion 26, the substrate 28, and the connection pieces 27b and 27c are formed by the rotation shaft 5 of the shaft housing portion 14 and the nut 17 and the screw 18 of the connection portion 13.
Element 2 provided at the tip of substrate 28 without interfering with
9 is arranged near the outer peripheral surface of the sensor magnet 11 provided from the base end side of the rotating shaft 5.

The fitting portion 26b of the connector portion 26 is fitted in the fitting recess 16b, and the fitting piece 26c is fitted in the fitting hole 1b.
By fitting into the extension 6c, rattling of the connector portion 26 with respect to the extension portion 16 is prevented. Then, the locking piece 26d of the connector 26 is locked to the locking projection 16a, so that the connector 26 is prevented from falling out of the extension 16. An annular waterproof rubber 30 is attached to the fitting portion 26b of the connector portion 26, and the fitting portion 26b and the extension 16
Of the fitting recess 16b.

A vehicle-side connector connected to the connector section 26 extends from a controller (not shown) for controlling the motor 1. When such a vehicle-side connector is connected to the connector section 26, drive power is supplied from the controller to the motor section 2 through the terminal 27, the connection pieces 27b and 27c, and the power supply terminals 20 and 21. At the same time, a detection signal for detecting the rotation direction and the number of rotations of the motor unit 2 is output from the Hall element 29 to the controller via the board 28, the connection terminal 27a, and the terminal 27.

Next, the operation of the motor 1 configured as described above will be described. In the motor 1 having the above-described configuration, the two housings 4, in which the connector portion 26 having the substrate 28 is inclined with respect to the shaft housing portion 14 (the rotating shaft 5) and assembled.
12 so that it is parallel to the longitudinal direction of the speed reduction housing 1.
It is configured to be inserted into the extension 16 from the direction 2 to the yoke housing 4.

If the connector 26 is inserted in a direction perpendicular to the shaft housing 14 (rotary shaft 5), the connector 26, the substrate 28, and the connection pieces 27b, 27
It is necessary to dispose the front end of the substrate 28 on the front end side of the rotary shaft 5 (the reduction housing 12 side) so that c does not interfere with the nut 17 and the screw 18 of the connecting portion 13. for that reason,
The Hall element 29 provided at the front end of the substrate 28 is also disposed at the front end of the rotary shaft 5, and the sensor magnet 11 is also provided at the front end of the rotary shaft 5 from the position shown in FIGS. Become.

Therefore, if the connector portion 26 is inserted and inclined with respect to the rotary shaft 5 as in the present embodiment, the connector portion 26 is inserted in a direction orthogonal to the rotary shaft 5. In comparison with the case, the front end of the substrate 28 can be arranged on the base end side of the rotating shaft 5 (on the bottom side of the yoke housing 4). That is, the Hall element 29 provided at the distal end of the substrate 28 can also be arranged at the base end side of the rotating shaft 5, so that the sensor magnet 11 can also be arranged at the base end side of the rotating shaft 5.

As a result, the sensor magnet 1 of the rotating shaft 5
The worm 5a provided on the distal end side from the base 1 can be formed on the base end side, and the rotating shaft 5 can be shortened. Therefore, the size of the motor 1 in the axial direction can be reduced.

As described above, according to the present embodiment,
It has the following effects. (1) In the motor 1 of the present embodiment, the connector section 26 having the board 28 is inclined with respect to the shaft accommodating section 14 (the rotating shaft 5), and the longitudinal direction of the two housings 4, 12 assembled. The extension 16 is inserted from the speed reduction housing 12 toward the yoke housing 4 so as to be parallel. Therefore, as compared with the case where the connector 26 is inserted in the direction orthogonal to the rotation shaft 5, the distal end of the substrate 28 provided with the Hall element 29 is moved toward the base end of the rotation shaft 5 (the bottom of the yoke housing 4). Therefore, the sensor magnet 11 can be provided on the base end side of the rotating shaft 5. Therefore, the worm 5a provided on the tip side of the sensor magnet 11 of the rotating shaft 5 can be formed on the base end side, and the rotating shaft 5 can be shortened. As a result, the size of the motor 1 in the axial direction can be reduced.

(2) Since the rotating shaft 5 can be shortened, the rotating shaft 5 is hardly bent, and a loss of driving force due to the bending of the rotating shaft 5 can be reduced. (3) The connector portion 26 is inserted parallel to the longitudinal direction of the housings 4 and 12, ie, parallel to the longitudinal direction of the motor 1, so that the thickness in the direction orthogonal to the longitudinal direction of the motor 1 can be reduced. .

(4) Since the board 28 provided with the hall element 29 is integrally assembled to the connector section 26,
8 can be easily mounted on the speed reduction housing 12 (extending portion 16).

(5) The extension 16 has connection pieces 27b and 27c extending from the connector 26 inserted thereinto.
And terminal insertion holes 16f and 16g for guiding the power supply terminals 7b and 27c to the power supply terminals 20 and 21, respectively.
The tapered portions 16h, 1 for guiding the connection pieces 27b, 27c into the insertion holes 16f, 16g are provided at the openings of the holes f, 16g.
6i are provided. Therefore, the tapered portions 16h and 16h
i, the connection pieces 27b, 27c are inserted into the insertion holes 16f, 1
6g, and the connection pieces 27b, 27c can be guided to the power supply terminals 20, 21, so that electrical connection between the connection pieces 27b, 27c and the power supply terminals 20, 21 can be easily performed. Can be.

When the reduction housing 12 is formed, the taper portion 16 is formed at the opening of the insertion holes 16f, 16g in the mold for forming the terminal insertion holes 16f, 16g.
h, 16i, the mold has a terminal insertion hole 1
Since the roots of the projections forming 6f and 16g can be made thicker, the durability of the mold can be improved.

(6) Connection piece 2 extending from connector section 26
7b and 27c have tip portions 27d and 27e at the tip portions 27d and 27e.
f, 27g are formed, and the power supply terminal 2
The connecting pieces 27b, 2
A guide portion 20b for guiding the tip portions 27d and 27e of the 7c;
21b is formed. Therefore, these sword-shaped portions 27f, 2
7g and the guide portions 20b and 21b,
Electrical connection between the power supply terminals 20 and 21 and the power supply terminals 20 and 21 can be more easily performed.

(7) The extension 16 has a substrate guide groove 16d for guiding the substrate 28 to a predetermined position, that is, a Hall element 29 provided on the substrate 28 to a predetermined position facing the outer peripheral surface of the sensor magnet 11. Provided. Therefore, the Hall element 29 can be easily arranged at a position suitable for detecting the rotation of the sensor magnet 11 by the substrate guide groove 16d.

(8) A rotation sensor is constituted by the sensor magnet 11 which is multipolarly magnetized in the rotation direction and the Hall element 29 which detects a change in the magnetic field due to the rotation of the magnet 11. Therefore, the configuration of the rotation sensor can be simplified.

(9) The Hall element 29 is arranged so as to face the outer peripheral surface of the sensor magnet 11. Therefore,
As compared with the case where the Hall element 29 is arranged to face one end face of the sensor magnet 11, the rotation axis 5
When the sensor magnet 11 moves in the same direction due to the backlash in the axial direction, the sensor magnet 11 and the Hall element 2
9 does not change much. Therefore, the adverse effect on the rotation detection due to the movement of the sensor magnet 11 can be reduced.

The embodiment of the present invention may be modified as follows. In the above embodiment, the connector 26 having the substrate 28
Is extended from the speed reduction housing 12 toward the yoke housing 4 so as to be inclined with respect to the shaft housing portion 14 (the rotation shaft 5) and so as to be parallel to the longitudinal direction of the two housings 4 and 12 assembled. Although the connector portion 26 is inserted into the housing 16, the connector portion 26 having the board 28 may be inserted in a direction other than the longitudinal direction of the two housings 4 and 12 assembled. That is, at least the connector portion 26 is
What is necessary is just to insert and install so that it may incline with respect to the shaft accommodating part 14 (rotation shaft 5).

The fitting hole 16c, substrate guide groove 16d, element insertion hole 16e,
Further, the shapes of the two terminal insertion holes 16f and 16g are not limited to the shapes described above.

The connection pieces 27b and 27c extending from the connector section 26 of the above embodiment and the power supply terminals 20 and 2
The shape and number of the one holding portions 20a and 21a are not limited to the shapes and numbers described above.

In the above embodiment, the board 28 and the connector 26 are integrally assembled. However, the board 28 and the connector 26 may be assembled separately to the speed reduction housing 12.

In the above embodiment, the rotation sensor is constituted by using two Hall elements 29 as the rotation detecting element and the sensor magnet 11 as the object to be detected. However, the constitution of the sensor is not limited to this. Absent. For example, 1
One Hall element 29 may be used. Further, a magnetic detecting element other than the Hall element 29, for example, a magnetoresistive element may be used. Also, the Hall element 29 and the sensor magnet 11
Alternatively, a magnetic detection type rotation sensor including a rotation detection element and an object to be detected other than the combination described above may be used. Further, a rotation sensor including a rotation detection element and a detection target other than the magnetic detection type may be used.

In the above embodiment, the Hall element 29 is provided on the substrate 28, but may be provided on a support other than the substrate 28. In the above embodiment, the Hall element 29 is disposed so as to face the outer peripheral surface of the sensor magnet 11, but the Hall element 29 may be disposed so as to face one end surface of the sensor magnet 11.

In the above embodiment, the worm wheel 2
Although the speed reduction mechanism is configured by the worm 4 and the worm 5a, the invention is not limited to this configuration. The shapes of the yoke housing 4 and the speed reduction housing 12 in the above embodiment are not limited to the shapes described above. For example, the yoke housing may be cylindrical with a bottom.

In the above embodiment, the present invention is applied to the motor 1 used as a drive source of the vehicle power window device. However, the present invention may be applied to a motor used as a drive source of another vehicle device or a device other than the vehicle. Good.

The technical ideas other than the claims that can be understood from the above embodiments will be described below together with their effects. (B) In the motor according to any one of claims 1 to 7, the object to be detected is a sensor magnet magnetized in multiple directions in a rotating direction, and the rotation detecting element is configured to rotate the sensor magnet. A motor, characterized in that it is a magnetic detection element for detecting a magnetic field change due to the magnetic field.
With this configuration, the configuration of the rotation sensor can be simplified.

[0060]

As described in detail above, according to the present invention,
A motor that can be reduced in size can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a motor with a speed reduction mechanism according to an embodiment.

FIG. 2 is a cross-sectional view of the motor with a speed reduction mechanism after a connector is inserted.

FIG. 3 is a cross-sectional view of a motor with a speed reduction mechanism before a connector portion is inserted.

FIG. 4 is a perspective view of a main part of a motor with a speed reduction mechanism.

FIG. 5 is a front view of an extension portion of the speed reduction housing.

FIG. 6 is a sectional view taken along line AA of FIG. 2;

FIG. 7A is a plan view of a connector section and a board,
(B) is a side view of the connector part and the board, and (c) is a bottom view of the connector part and the board.

FIG. 8 is a bottom view of a main part of the motor with a speed reduction mechanism.

FIG. 9 is a diagram for explaining connection between a connection piece and a power supply side terminal.

[Explanation of symbols]

2 ... motor section, 3 ... reduction section, 4 ... yoke housing, 4
a: opening, 5: rotating shaft, 5a: worm constituting a speed reduction mechanism, 11: sensor magnet as an object to be detected, 1
2, a speed reduction housing, 16d, a guide portion as a substrate guide groove, 16f, 16g, an insertion hole as a terminal insertion hole, 16h, 16i, a tapered portion as a guide portion, 20,
21: power supply terminal, 20a, 21a: clamping section, 2
0b, 21b: guide portion, 24: worm wheel constituting a reduction mechanism, 26: connector portion, 27: terminal,
27b, 27c ... connecting pieces, 27d, 27e ... tip portions as insertion portions, 27f, 27g ... sword-shaped portions as guide portions,
28: a substrate as a support, 29: a Hall element as a rotation detecting element.

Claims (7)

[Claims] 1. A motor unit rotatably supported by a bottomed cylindrical yoke housing and having a rotation shaft having a detection object fixed at a position located on the opening side of the housing, and an opening of the yoke housing. A deceleration unit that has a deceleration housing assembled in the housing, and that accommodates a deceleration mechanism that decelerates the rotation of the rotary shaft in the housing; A support provided at the tip so that the detection element is disposed in the vicinity of the object to be detected, wherein the support is inclined with respect to the rotation axis, and faces from the deceleration housing to the yoke housing. A motor inserted into the deceleration housing from a tip end side thereof. 2. The motor according to claim 1, wherein the support is further inserted so as to be parallel to a longitudinal direction of the two housings assembled together. 3. The motor according to claim 1, further comprising: a connector having a terminal, the connector being inserted into the deceleration housing in the same direction as the support, and a rotation provided on the support. A motor, wherein a detection element is electrically connected to the terminal, and the support is integrated with the connector. 4. The motor according to claim 3, wherein the connector portion further includes a terminal having a connection piece for electrically connecting to a power supply terminal extending from the motor portion. Has an insertion hole into which the connection piece is inserted and guides the connection piece to the power supply terminal.In the insertion opening of the insertion hole into which the connection piece is inserted,
A motor provided with a guide portion for guiding the connection piece into the insertion hole. 5. The motor according to claim 4, wherein the power supply terminal or the connection piece has a holding portion.
A motor, further comprising an insertion portion inserted into the holding portion on one of the other sides, and a guide portion for guiding the insertion portion into the holding portion is provided on at least one of the holding portion and the insertion portion. 6. The motor according to claim 1, wherein the deceleration housing is provided with a guide portion for guiding the support to a predetermined position. 7. The motor according to claim 1, wherein the rotation detecting element is disposed so as to face an outer peripheral surface of the detection target.