JP2001090429A - Motor and open-close member driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an open-close member driving device, by which maximum pinching load applied to a pinched foreign substance can be reduced sufficiently, and its motor. SOLUTION: The motor has a motor body 2 rotating and driving a shaft and an output section 3 with an output shaft 11 turned on the basis of the rotation of the shaft, and the revolving torque of the shaft is transmitted to the output shaft 11 through the first elastic members 8, 9 having fixed spring constants set for reducing pinching load. The first elastic members 8, 9 are composed of the first and second C ring springs 8, 9, and have at least two different spring constants, and at least one spring constant in them is set at a value smaller than the fixed spring constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing member driving device and a motor, and more particularly to a power window device having a pinching prevention function and an opening / closing member driving device and a motor suitable for the motor.

[0002]

2. Description of the Related Art Conventionally, in a power window device, when a motor is driven, its rotational force is converted into reciprocating motion by a regulator, and the regulator performs opening and closing operations by moving the window glass up and down. ing.

[0003] As a power window device, there is a device having an anti-jamming function. This power window device interrupts the rise of the window glass and lowers the window glass when the pinch is detected, for example, by monitoring the load current of the motor, monitoring the amount of change in the speed of the window glass, or the like. Therefore, in this power window device, a certain period of time is required from the time of being sandwiched to the time of lowering of the window glass.

[0004] Therefore, there is a power window device provided with a pinch buffer mechanism in a motor. As a power window device having a motor with a buffer mechanism, Japanese Patent Application Laid-Open No.
There is one disclosed in Japanese Patent No. 184359. This power window device (power window regulator device)
Has a ring spring inside the motor, and the torque of the motor body (electric motor) is transmitted to the output shaft of the motor via the ring spring. Therefore, in this power window device, if a foreign matter is caught during the rising of the window glass, for example, the ring spring is bent so that a large load is not applied to the foreign matter. That is,
The lifting torque of the window glass based on the rotation torque of the motor body is not directly transmitted while the ring spring is bent. As a result, in this power window device, the maximum load applied to the sandwiched object is reduced within a predetermined time from when the window glass is sandwiched until the window glass descends.

[0005] In the power window device disclosed in Japanese Patent Application Laid-Open No. 9-184359, the ring spring also serves as a motor protection buffering mechanism. The motor protection buffering mechanism reduces the shock generated inside the motor (for example, a worm and a worm wheel) when the windshield collides with a window frame of a vehicle door and the motor is stopped. It is for preventing. However, a small spring constant of the ring spring (for example, about 20 to 40 N / mm) is appropriate to reduce the pinching load, and a spring constant of the ring spring is small to reduce the impact inside the motor. Large ones (for example, 100 N / m
m) is appropriate. Accordingly, there is a problem that the buffer mechanism of the power window device cannot perform a sufficient function with respect to one of the buffers.

Therefore, the present applicant has provided a first elastic member having a large spring constant and a second elastic member having a small spring constant between the rotation shaft and the output shaft, and reduces the rotational force of the rotation shaft by the first force. And a technique of transmitting the power to the output shaft via a second elastic member (Japanese Patent Application No. 10-154812). In the power window device provided with this motor, for example, when a foreign object is caught during the rising of the window glass, the maximum load applied to the foreign object is reduced by bending the second elastic member. or,
When the window glass collides with the window frame of the vehicle door and the motor is stopped, the shock generated inside the motor (for example, the worm and the worm wheel) is reduced by the first elastic member being bent, and the motor is damaged. Is prevented.

[0007]

However, in the power window device disclosed in Japanese Patent Application No. 10-154812,
Since the spring constant of the second elastic member is substantially constant, the entrapment load increases substantially in proportion to the time while the second elastic member bends after the start of the entrapment, as indicated by a characteristic A shown in FIG. There is a problem that the maximum load applied to the foreign matter sometimes increases.

An object of the present invention is to provide an opening / closing member driving device and a motor thereof, which can sufficiently reduce the maximum squeezing load applied to the squeezed foreign matter.

[0009]

According to a first aspect of the present invention, there is provided a motor body for driving a rotating shaft to rotate, and an output portion having an output shaft for rotating based on the rotation of the rotating shaft, and a pinching load is provided. In a motor that transmits the rotational force of the rotating shaft to the output shaft via a first elastic member having a predetermined spring constant set to reduce the force, the first elastic member has at least two different spring constants. The gist is that at least one of the spring constants is set smaller than the predetermined spring constant.

According to a second aspect of the present invention, in the motor according to the first aspect, a spring constant is set between the rotation shaft and the output shaft to reduce an impact inside the motor. The gist of the invention is to provide a second elastic member, and to transmit the rotational force of the rotating shaft to the output shaft via the first and second elastic members.

According to a third aspect of the present invention, in the motor according to the second aspect, the rotational force in one direction of the rotating shaft is transmitted to the output shaft via the first and second elastic members. The gist is that the rotational force in the other direction of the rotating shaft is transmitted to the output shaft via the second elastic member.

The invention described in claim 4 is the invention according to claim 2 or 3.
3. The motor according to claim 1, wherein the output unit is connected to a transmission plate to which a rotational force of the rotating shaft is transmitted via the second elastic member, and the output shaft, and the rotational force of the transmission plate is the first to the first unit. An output plate transmitted through an elastic member, wherein the first elastic member is formed in a C-shape in which a part of an annular shape is cut, and one end of the cut is engaged with the transmission plate, A first C-ring spring, the other end of which is engaged with the output plate, and a C-shape formed by partially cutting out an annular shape, wherein both ends of the notch are the first C-ring.
The gist of the present invention is to provide a second C-ring spring that engages both ends of the notch while the C-ring spring is bent so as to spread.

[0013] The invention according to claim 5 is the invention according to claims 2 to 4.
In the motor according to any one of the above, the rotating shaft includes a worm, the output unit includes a connection rotating body that meshes with the worm and rotates in proportion to the rotation of the worm, At least one of the second elastic members
The gist of the present invention is that one of them is arranged on the inner peripheral side of the connecting rotating body.

[0014] The invention according to claim 6 is the invention according to claims 1 to 5.
An opening / closing member drive device comprising: the motor according to any one of the above, and an opening / closing member that is driven to open and close based on rotation of the output shaft.

(Operation) According to the first aspect of the present invention,
The rotational force of the rotating shaft has at least two different spring constants, at least one of which is transmitted to the output shaft via a first elastic member set to be smaller than a predetermined spring constant. Therefore, for example, if this motor is used as a motor of a power window device with an anti-jamming function, when the window glass driven based on the rotation of the output shaft intersects, for example, foreign matter, the rotational force of the rotary shaft becomes the first elasticity. While the member is bent, it is not transmitted directly to the output shaft, and the maximum load on the interposed foreign matter can be reduced. In addition, the first elastic member has at least two different spring constants, and at least one of the spring constants is set to be smaller than a predetermined spring constant. A portion having a small spring constant bends, and the load applied to the foreign matter during that portion can be further reduced. Therefore, the maximum load applied to the foreign matter can be further reduced.

According to the second aspect of the present invention, the rotational force of the rotating shaft is output via the first elastic member and the second elastic member having a spring constant set to reduce an impact inside the motor. Transmitted to the shaft. Therefore, for example, if this motor is used as a motor of a power window device with a pinch prevention function, in addition to the effect of the invention described in claim 1, the window glass collides with the window frame of the vehicle door and the like, and When the rotation is stopped, the impact force generated inside the motor (for example, the worm and the worm wheel, etc.) is
This can be reduced by bending the elastic member, and damage to the motor can be prevented.

According to the invention described in claim 3, for example,
If this motor is used as a motor of a power window device, and the window glass is driven in the closing direction, the rotary shaft is driven in one direction, so that the same effect as the effect of the invention according to claim 2 is obtained. be able to. Moreover, the first elastic member transmits the rotational force of the rotating shaft only when driving the window glass in the closing direction, so that the time for receiving the rotational force is halved. Therefore, the durability of the first elastic member is improved.

According to the fourth aspect of the invention, the rotational force of the rotating shaft is transmitted to the transmission plate via the second elastic member, and the rotational force of the transmission plate is transmitted to the output plate via the first elastic member. And transmitted to the output shaft. In the first elastic member, both ends of the notch of the second C-ring spring engage with both ends of the notch of the first C-ring spring while the first C-ring spring is bent so as to expand, so that the spring constant changes during the bending.

According to the invention described in claim 5, according to claim 2,
Or in addition to the effect of the invention described in item 3, since at least one of the first and second elastic members is disposed on the inner peripheral side of the connection rotating body, the motor becomes large. Is reduced.

According to the invention described in claim 6, when the opening / closing member driven based on the rotation of the output shaft sandwiches, for example, a foreign object, the rotation force of the rotation shaft is output while the first elastic member is bent. It is not transmitted directly to the shaft, and it is possible to reduce the maximum load applied to the interposed foreign matter. Moreover, since the first elastic member has at least two different spring constants,
Immediately after the foreign matter is sandwiched, the portion of the first elastic member having a small spring constant bends, and the load applied to the foreign matter during that time can be further reduced. Therefore, the maximum load applied to the foreign matter can be further reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a motor 1 of a power window device. The motor 1 includes a motor body 2 and an output unit 3, and the output unit 3 includes a housing 4, a connecting rotating body 5, a rubber 6 for motor protection, and a transmission plate 7.
, First and second C-ring springs 8 and 9, an output plate 10, and an output shaft 11. In the present embodiment, the first and second C-ring springs 8 and 9 constitute a first elastic member for reducing an entrapment load, and the rubber 6 for protecting the motor serves as a first elastic member for reducing an impact inside the motor. 2 constitutes an elastic member.

Wheel housing 4 of the housing 4
a is formed in a substantially bottomed cylindrical shape, a cylindrical bearing wall 4b extending inward in the axial direction is formed at the center of the bottom, and penetrates the bottom of the wheel housing 4a on the inner peripheral side of the bearing wall 4b. An axial hole 4c is formed. In the housing 4, a substantially cylindrical worm housing 4 d communicating with the motor main body 2 is formed in a part of the cylindrical portion of the wheel housing 4 a. A worm formed on a rotating shaft (not shown) of the motor main body 2 is disposed in the worm housing 4d.

The connecting rotary member 5 is formed of a resin material into a substantially cylindrical shape with a bottom, and a worm wheel portion 5a that meshes with the worm is formed on the outer peripheral surface. A cylindrical support wall 5b extending inward in the axial direction is formed at the center of the bottom of the connecting rotator 5, and an inner peripheral side of the supporting wall 5b penetrates the bottom of the connecting rotator 5 to form an axial hole 5c. are doing. Further, three holding walls 5d extending toward the support wall 5b are formed at equal angle (120 °) intervals on the inner peripheral surface of the cylindrical portion of the connecting rotating body 5. That is, the holding wall 5 is provided on the inner peripheral side of the connecting rotating body 5.
d, and the holding chambers X adjacent to each other between the tip of the holding wall 5d and the outer peripheral surface of the support wall 5b.
Are formed respectively.

The motor protecting rubber 6 is formed corresponding to the holding chamber X and the communication groove Y of the connecting rotary member 5. More specifically, the rubber 6 for protecting the motor includes three rubber spring portions 6a formed in a substantially sector shape, and the rubber spring portions 6a.
And a connection detail 6b for annularly connecting.
An engagement groove 6c penetrating in the thickness direction extends from the center of the outer peripheral side of each rubber spring portion 6a to a predetermined position on the inner peripheral side. In the present embodiment, the spring constant of the rubber spring portion 6a is set to about 100 N / mm in order to reduce the impact inside the motor.

The transmission plate 7 is an annular metal plate, and is formed so that three engagement pieces 7a are engaged with the engagement grooves 6c of the motor protection rubber 6 by cutting and raising. A first transmission piece 7 extending radially outward is provided on a part of the outer peripheral end of the transmission plate 7 which is not cut and raised.
b is formed.

The first C-ring spring 8 is formed in a C-shape in which a part of an annular shape is cut out.
Extending portions 8a and 8b extending radially outward are formed, respectively.

The second C-ring spring 9 is formed in a C-shape in which a part of an annular shape is cut out.
Extending portions 9a and 9b extending radially outward are formed, respectively. The second C-ring spring 9 has a larger diameter than the first C-ring spring 8 in an unflexed state,
a, 9b are both extended portions 8a of the first C-ring spring 8;
The interval is set to be longer than the interval of 8b. 1st C
The spring constant of the ring spring 8 is set lower than a predetermined spring constant of a conventionally used ring spring (C ring spring), and is set to about 10 N / mm. Also, the second
The spring constant of the C-ring spring 9 is set to about 30 N / mm.

The output plate 10 is a substantially annular metal plate having a diameter larger than the diameter of the transmission plate 7, and has a second transmission piece 10a, a regulating piece 10b, Two spring holder pieces 10c and 10d are formed with a predetermined angular interval. Each piece 10a to 10d
Are each extended radially outward, and the tip is bent in the axial direction. The center hole of the output plate 10 forms a fitting hole 10e in which cut portions are formed at equal angle (90 °) intervals.

The output shaft 11 comprises a shaft portion 11a and a gear portion 11b formed at the tip thereof.
A fitting portion 11c is formed at the base end of the shaft portion 11a so as to be fitted in the fitting hole 10e of the output plate 10 and to be engaged in the circumferential direction.

The connecting rotary member 5 is accommodated in the wheel housing 4a. At this time, the connecting rotating body 5
The worm wheel portion 5a is meshed with a worm formed on the rotation shaft of the motor body 2, and the inner peripheral surface of the shaft hole 5c is formed on the bearing wall 4 of the wheel housing 4a.
bSlidably supported on the outer peripheral surface. Therefore, the connecting rotating body 5 is driven to rotate in proportion to the rotation of the rotating shaft of the motor body 2.

In the connecting rotary member 5, the rubber 6 for protecting the motor is accommodated. More specifically, the rubber spring portions 6 of the rubber 6 for protecting the motor are provided in the respective holding chambers X of the connecting rotary member 5.
a are respectively stored and held, and the respective communication grooves Y of the connecting rotary body 5 are
Inside each connection detail 6b of the rubber 6 for motor protection is stored and held.

The transmission plate 7 is connected to the motor protection rubber 6. More specifically, the motor protection rubber 6 has the engagement pieces 7 of the transmission plate 7 in the engagement grooves 6c.
By inserting a, the transmission plate 7 is connected (see FIG. 2). Therefore, when the connecting rotary body 5 is driven to rotate, the transmission plate 7 is driven to rotate via the rubber spring portions 6a of the motor protection rubber 6.

The first and second C-ring springs 8, 9 and the output plate 10 are connected to the transmission plate 7. More specifically, as shown in FIG. 3, a first C-ring spring 8 is disposed on the outer peripheral side of the transmission plate 7,
The second C-ring spring 9 is arranged on the outer peripheral side of the C-ring spring 8. Here, one extension (8a) of the first C-ring spring 8 is in contact with one side (the counterclockwise side in the drawing) of the first transmission piece 7b, and the other extension 8b of the first C-ring spring 8 is in contact with the first extension. The other extension 9b of the 2C ring spring 9 abuts. And the first C
The output plate 10 is laminated on the upper surface of the transmission plate 7 in a state where the ring spring 8 is bent in the direction in which the other extension portion 8b is separated from the one extension portion 8a (the direction of arrow A in the figure), and the first plate is laminated.
The distal end of the second transmission piece 10a of the output plate 10 is inserted between the transmission piece 7b and the other extension 8b. The restriction piece 10b and the spring holder piece 10 in the output plate 10
The tips of c and 10d are arranged outside the outer peripheral surface of the second C-ring spring 9 with a gap. In this state, the outer peripheral surface of the intermediate portion of the first C-ring spring 8 and the second C-ring spring 9
A gap Z is formed between the inner peripheral surface and the inner peripheral surface.

Therefore, the transmission plate 7 is moved in one direction (FIG. 3).
When the output plate 10 is rotated in the middle or counterclockwise direction (hereinafter referred to as forward rotation), the output plate 10 is driven to rotate forward through the first C-ring spring 8. More specifically, when the transmission plate 7 rotates forward (rotates counterclockwise in FIG. 3), the first transmission piece 7b pushes one extension 8a of the first C-ring spring 8, and the other extension 8b of the C-ring spring 8 extends. Is the second transmission piece 10 of the output plate 10
By pressing a, the output plate 10 is driven to rotate forward.

On the contrary, the transmission plate 7 is moved in the other direction (in FIG. 3,
When the output plate 10 is rotated in the clockwise direction (hereinafter referred to as reverse rotation), the output plate 10 is driven in reverse rotation. More specifically, when the transmission plate 7 rotates in the reverse direction (clockwise rotation in FIG. 3), the first transmission piece 7b is directly connected to the second transmission piece 1 of the output plate 10.
By pressing Oa, the output plate 10 is driven to rotate in the reverse direction.

The output plate 10 has the output shaft 1
1 is connected and fixed. More specifically, the output shaft 11 is configured such that the base end side of the shaft portion 11a is inserted into the shaft center hole 4c from the bottom side of the wheel housing 4a, and the fitting portion 11c
Are fitted into the fitting holes 10e of the output plate 10. Therefore, the output shaft 11 is rotatably supported by the wheel housing 4a, and is rotated integrally with the output plate 10.

The upper end of the wheel housing 4a is covered with a lid (not shown). In the motor 1 configured as described above, the gear portion 11b of the output shaft 11 is connected to a known X-arm type regulator R as shown in FIG. At this time, the motor 1 causes the window glass W to close (up) when the gear portion 11b rotates forward, and opens (down) when the gear portion 11b rotates reversely. , In a known manner. The motor 1 is provided with a known rotation sensor (not shown) for detecting the rotation of the output plate 10 with respect to the rotation of the rotation shaft. Further, the motor 1 includes an anti-jamming device that stops the forward rotation of the rotating shaft and reversely rotates the rotating shaft when the ratio of the forward rotating speed of the output plate 10 to the forward rotating speed of the rotating shaft changes. Have been.

In the power window device configured as described above, when the motor body 2 of the motor 1 is driven to close (up) the window glass W, the connecting rotary body 5 rotates forward based on the rotation of the worm. Is done. When the connection rotating body 5 is rotated forward, the transmission plate 7 is rotated forward via the rubber spring portions 6a of the motor protection rubber 6. When the transmission plate 7 is rotated forward, the output plate 10 and the output shaft 11 are rotated forward via the first C-ring spring 8. When the output shaft 11 (the gear portion 11b) is rotated forward, the rotational force is converted into forward movement by the regulator R, and the regulator R closes (or raises) the window glass W.

Conversely, when the motor main body 2 of the motor 1 is driven to open (lower) the window glass W, the connecting rotating body 5 is reversely rotated based on the rotation of the worm.
When the connecting rotator 5 is rotated in the reverse direction, the transmission plate 7 is rotated in the reverse direction via the rubber spring portions 6a of the motor protection rubber 6. When the transmission plate 7 is reversely rotated, the output plate 10 and the output shaft 11 are integrally reversely rotated. Output shaft 11
When the (gear portion 11b) is rotated in the reverse direction, the rotational force is converted into the backward movement by the regulator R, and the regulator R opens (downs) the window glass W.

Next, the characteristic effects of the motor and the power window device configured as described above will be described. (1) In the above embodiment, when the transmission plate 7 is rotated forward (in FIG. 3, counterclockwise rotation), the first C-ring spring 8 is rotated.
, The output plate 10 and the output shaft 11 are rotated forward. At this time, if the window glass W sandwiches foreign matter,
As shown in FIG. 4, when the first transmission piece 7b pushes the one extension 8a of the first C-ring spring 8, the first C-ring spring 8 is first bent. Therefore, the first elastic member has the spring constant of the first C ring spring 8. Next, as the one extension 8a of the first C ring spring 8 pushes the one extension 9a of the second C ring spring 9, the first and second C ring springs 8 and 9 are simultaneously bent as shown in FIG. Therefore, the first elastic member has a combined spring constant of the spring constants of the first and second C-ring springs 8 and 9. As the first and second C-ring springs 8 and 9 bend in this way, the output shaft 11 (output plate 10) stops with respect to the rotation of the rotating shaft (transmission plate 7). While the first C-ring spring 8 bends and the first and second C-ring springs 8 and 9 simultaneously bend, the load applied to the pinched foreign matter depends on the spring constant of the first and second C-ring springs 8 and 9 and the motor Since it is not related to the rotation torque of the rotation shaft of the main body 2, the value is small (see the characteristic B in FIG. 7). Moreover, while the first C-ring spring 8 is in the initial stage in which the foreign matter is pinched, the load applied to the foreign matter has an extremely small value.

(2) The output shaft 11 with respect to the forward rotation of the rotating shaft
When the (output plate 10) stops, the rotation sensor detects the entrapment. Then, the forward rotation of the rotating shaft is stopped, and the rotating shaft is reversely rotated. As described above, when the reverse rotation is started while the first and second C-ring springs 8 and 9 are simultaneously bent, the maximum load applied to the foreign matter has a small value (see the characteristic B in FIG. 7). .

(3) In the above embodiment, the connecting rotary member 5
Is rotated, each rubber spring portion 6 of the rubber 6 for motor protection is rotated.
The transmission plate 7 is rotated via a. The spring constant of the rubber spring 6a is set to about 100 N / mm. Therefore, when the window glass W collides with the window frame of the vehicle door and the rotation of the output shaft 11 is stopped, the inside of the motor 1 (for example, the worm and the worm wheel 5a) is stopped.
The impact force generated during the period is reduced by bending each rubber spring portion 6a of the motor protection rubber 6. As a result, damage to the motor 1 is prevented.

(4) In the above embodiment, the first and second
The C-ring springs 8 and 9 are used only when the window glass W is driven in a direction to close the window glass W necessary for reducing the sandwiching load.
The torque of the rotating shaft is transmitted to the output shaft 11. That is, when driving in the direction in which the window glass W is opened, the rotational force of the rotating shaft is not transmitted to the output shaft 11. Therefore, the first C-ring spring 8 is moved with respect to the time for opening and closing the window glass W.
Halves the time that the shaft receives the rotational force of the rotating shaft. Therefore,
The durability of the first C ring spring 8 is improved.

(5) In the above embodiment, the motor protection rubber 6 is accommodated in each holding chamber X and each communication groove Y formed on the inner peripheral side of the connecting rotary member 5. Therefore, the increase in the size of the motor 1 is reduced.

(6) In the above embodiment, the first and second C-ring springs 8 and 9 are used as the first elastic members, and the rubber 6 for protecting the motor is used as the second elastic members. Therefore, the spring constant of the first elastic member can be easily set to an appropriate value smaller than the spring constant of the second elastic member.

(7) In the above embodiment, since the rubber 6 for motor protection and the first and second C-ring springs 8 and 9 are provided in the housing 4 of the motor 1, the rubber 6 for motor protection and the first and second C-ring springs are provided. The 2C ring springs 8 and 9 do not require high environmental resistance.

(8) In the above embodiment, when the second C-ring spring 9 is bent by the two spring holder pieces 10c and 10d formed on the output plate 10, the outer periphery of the intermediate portion of the second C-ring spring 9 is formed by the spring holder pieces 10c and 10d. It does not protrude radially outward from 10d. Therefore, the outer periphery of the intermediate portion of the second C-ring spring 9 does not come into contact with the inner peripheral surface of the wheel housing 4a.

The above embodiment may be modified as follows. In the above embodiment, the first and second C-ring springs 8,
9, the first elastic member has at least two different spring constants, at least one of which has a smaller spring constant than the conventional spring constant, and reduces the pinching load. If possible, the configuration may be changed to another configuration.

For example, as shown in FIGS. 8 to 11, the second C-ring spring 9 of the above embodiment may be replaced with a rubber spring 21 for implementation. The rubber spring 21 is fixed to the restricting piece 10b of the output plate 10, as shown in FIGS. More specifically, the rubber spring 21 is fixed to the extension portion 8a of the first C-ring spring 8 of the restricting piece 10b.

In the power window device (motor) configured as described above, when the transmission plate 7 is rotated forward (in the counterclockwise direction in FIG. 9), the output plate 10 and the output shaft 11 are driven via the first C-ring spring 8. Is rotated forward. At this time, when the window glass W sandwiches the foreign matter, the first transmission ring 7b pushes the extension portion 8a of the first C ring spring 8 as shown in FIG. Next, the one extension 8a of the first C-ring spring 8 pushes the rubber spring 21 to cause the first C-ring spring 8 to move as shown in FIG.
The ring spring 8 and the rubber spring 21 bend simultaneously. The bending of the first C ring spring 8 and the rubber spring 21 as described above causes the output shaft 1 to rotate with respect to the rotation of the rotating shaft (the transmission plate 7).
1 (output plate 10) is stopped. While the first C-ring spring 8 is bent, the first C-ring spring 8 and the rubber spring 2
Since the load applied to the intervening foreign matter during the simultaneous bending of the first and second springs is related to the spring constant of the first C-ring spring 8 and the rubber spring 21 and is not related to the rotation torque of the rotating shaft of the motor main body 2,
It will be a small value. Moreover, while the first C-ring spring 8 is bent, which is an initial stage in which the foreign matter is sandwiched, the load applied to the foreign matter has an extremely small value.

In the above embodiment, the spring constant of the first C ring spring 8 is set to about 10 N / mm, and the spring constant of the second C ring spring 9 is set to about 30 N / mm.
If the spring constant of the first C-ring spring 8 is set lower than a predetermined spring constant of a conventionally used ring spring (C-ring spring), the respective values may be changed as appropriate. For example, the spring constant of each of the first and second C-ring springs 8 and 9 is set to 20N.
/ Mm.

In the above embodiment, when the connecting rotary member 5 rotates, the transmission plate 7
Is rotated, but the rubber 6 for motor protection is not provided.
You may change so that the connection rotating body 5 and the transmission plate 7 may rotate integrally. Even in this case, effects similar to the effects (1), (2), (4), and (8) of the above embodiment can be obtained.

In the above embodiment, the first elastic member formed by the first and second C-ring springs 8 and 9 is
, For example, the holding wall 5d and the engagement piece 7a
A first elastic member for reducing a sandwiching load and a second elastic member for reducing an impact inside the motor may be arranged. Specifically, three types of springs may be arranged between the holding wall 5d and the engagement piece 7a. In this case, the first and second C-ring springs 8, 9 and the output plate 10 become unnecessary, and the output shaft 11 is directly connected and fixed to the transmission plate 7.

Also in this case, the rotational force of the connecting rotary member 5 is transmitted to the output shaft 11 via the first and second elastic members. Therefore, the load applied to the trapped foreign matter is reduced. In addition, since the first elastic member has two spring constants, the load applied to the foreign matter at the initial stage when the foreign matter is sandwiched can be made extremely small. Further, damage to the motor 1 is prevented. Further, since the first and second elastic members are disposed on the inner peripheral side of the connecting rotary member 5, the motor is prevented from being enlarged. Furthermore, since the output plate 10 becomes unnecessary, the number of parts is reduced.

In the above embodiment, the rubber 6 for protecting the motor is provided on the inner peripheral side of the connecting rotary member 5, but may not be provided on the inner peripheral side. Even in this case, effects similar to the effects (1) to (4) and (6) to (8) of the above embodiment can be obtained.

In the above embodiment, the output plate 10
Although the two spring holder pieces 10c and 10d are formed in the first embodiment, the spring holder pieces 10c and 10d may not be formed. Even in this case, effects similar to the effects (1) to (7) of the above embodiment can be obtained.

In each of the above embodiments, the power window device of the vehicle using the motor 1 is embodied. However, another opening / closing member driving device for driving the opening / closing member based on the rotation of the output shaft of the motor 1 For example, the present invention may be embodied in a shutter opening / closing device that drives a shutter to open and close. In this case, it is of course necessary to appropriately change the spring constant and the like of the first and second elastic members (the first and second C-ring springs 8 and 9 and the rubber 6 for protecting the motor).

The technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. (A) The opening / closing member driving device according to claim 6, wherein when the jamming is detected, the closing operation of the opening / closing member is interrupted, and the opening / closing member driving device is provided with an anti-jamming function.

In this opening / closing member driving device, when the opening / closing member driven based on the rotation of the output shaft sandwiches foreign matter, the rotational force of the rotating shaft is not directly transmitted to the output shaft while the first elastic member is bent. . At the time of the entrapment, the output shaft stops with respect to the rotation of the rotary shaft. For example, if the rotation of the output shaft with respect to the rotation of the rotary shaft is monitored, the entrapment is detected, the closing operation of the opening / closing member is interrupted, and the The operation is performed. Therefore, the maximum load applied to the intervening foreign matter is reduced.

[0060]

As described in detail above, according to the present invention,
It is possible to provide an opening / closing member drive device and a motor that can sufficiently reduce the maximum sandwiching load applied to the sandwiched foreign matter.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part for describing a motor according to an embodiment.

FIG. 2 is an essential part cross-sectional view for explaining the motor of the embodiment.

FIG. 3 is a main part plan view for explaining the motor of the embodiment.

FIG. 4 is an explanatory diagram for explaining the operation of the motor according to the embodiment.

FIG. 5 is an explanatory diagram for explaining the operation of the motor according to the embodiment.

FIG. 6 is an explanatory diagram illustrating a power window device according to the present embodiment.

FIG. 7 is a characteristic diagram for explaining a sandwiching load.

FIG. 8 is an exploded perspective view of a main part for describing another example of a motor.

FIG. 9 is a main part plan view for explaining another example of a motor.

FIG. 10 is an explanatory diagram for explaining an operation of another example of the motor.

FIG. 11 is an explanatory diagram for explaining the operation of another example of the motor.

[Explanation of symbols]

2 ... motor body, 3 ... output part, 5 ... connection rotating body, 6 ... motor protection rubber, 7 ... transmission plate, 8 ... first C ring spring, 9 ... second C ring spring, 10 ... output plate, 1
DESCRIPTION OF SYMBOLS 1 ... Output shaft, 21 ... Rubber spring, 8a, 8b ... Extension part, 9
a, 9b: extension part, W: wind glass.

Continued on front page F-term (reference) 2E052 AA09 CA06 DA07 DA08 DB07 DB08 EA14 EB01 EC01 GA00 GB06 GB15 GC06 GD03 GD09 HA01 KA10 KA14 KA15 3D127 AA02 CB05 DF03 DF04 DF06 DF12

Claims (6)

[Claims] 1. A motor body (2) for rotatingly driving a rotating shaft.
And an output portion (3) having an output shaft (11) that rotates based on the rotation of the rotation shaft, via a first elastic member having a predetermined spring constant set to reduce a sandwiching load. Wherein the first elastic member (8, 9, 21) has at least two different spring constants, at least one of which has a different spring constant. The motor is characterized in that the constant is set smaller than the predetermined spring constant. 2. The motor according to claim 1, wherein a second elastic member having a spring constant set between the rotary shaft and the output shaft to reduce an impact inside the motor. A motor provided with (6), wherein the torque of the rotating shaft is transmitted to the output shaft (11) via the first and second elastic members (6, 8, 9, 21). 3. The motor according to claim 2, wherein the rotational force in one direction of the rotating shaft is applied to the output shaft (11) via the first and second elastic members (6, 8, 9, 21). )
And the rotational force in the other direction of the rotation shaft is transmitted to the second
The motor is transmitted to the output shaft (11) via an elastic member (6). 4. The transmission plate (7) according to claim 2, wherein the output portion (3) is configured to transmit a rotational force of the rotation shaft via the second elastic member (6). And an output plate (10) connected to the output shaft (11) and to which the rotational force of the transmission plate (7) is transmitted via the first elastic members (8, 9). The elastic members (8, 9) are formed in a C-shape in which a part of an annular shape is cut, and one end (8a) of the cut is engaged with the transmission plate (7),
The other end (8b) of the notch is formed into a first C-ring spring (8) engaged with the output plate (10), and a C-shape formed by partially cutting out an annular shape. 9b) is the first C ring spring (8).
While the notch is bent so as to spread, both ends of the notch (8a, 8
b) a second C-ring spring (9) that engages with the motor. 5. The motor according to claim 2, wherein the rotating shaft includes a worm, and the output portion (3) meshes with the worm and is proportional to the rotation of the worm. And a connecting rotator (5) that rotates by rotating at least one of the first and second elastic members (6, 8, 9, 21) on the inner peripheral side of the connecting rotator (5). A motor characterized by being provided. 6. An opening / closing member drive device comprising: the motor according to claim 1; and an opening / closing member (W) driven to open and close based on rotation of the output shaft (11).