JP2561587Y2 - Electric moving device for vehicle seat - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for electrically moving a vehicle seat mounted on a vehicle such as a private vehicle or a truck.

[0002]

2. Description of the Related Art
Seats attached to private cars or trucks can be adjusted to move back and forth according to the physique of the occupant, but such seats can be moved back and forth automatically by driving an electric motor. There is something that I did. On the other hand, for the purpose of facilitating getting in and out of the vehicle, the seat can be swung right and left.
No. 3-24019, and
It is proposed that such a lateral swing of the seat be performed using an electric motor. However, since the operation direction is different between the forward and backward movement of the seat and the left and right swing, it is necessary to provide a dedicated electric motor for each and perform a separate electric operation, which increases the number of parts and complicates the structure. However, there is a possibility that the entire seat moving device will become large in size, and it will not be possible to secure a space for providing various other functions to the seat, and the assembly work will be complicated and costly. There are problems such as.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made with an object of providing an electric moving device for a vehicle seat capable of eliminating these disadvantages. In moving the seat based on forward / reverse drive of the electric motor, an electric motor capable of forward / reverse drive control is provided on a movable bracket provided integrally with the seat, and the axis of the motor is driven in the front-rear direction. And first and second screw shafts that rotate around the axis in connection with the screw shafts. These screw shafts are screwed together so as to be able to move back and forth in the axial direction based on the relative rotation of the corresponding screw shafts. The first and second bridges are provided, and the first bridge is rotatably supported by the support, and the first bridge rotates relative to the first screw shaft. Move the first frame from the movable state to move back and forth Movement control means is provided which can be controlled to switch to a movement control state in which it is integrally rotated to control forward and backward movement. On the other hand, a fixed bracket on the vehicle body side rotates the support of the first frame body around a vertical axis. A first pivot portion that supports only the movable portion, and a second pivot portion that supports the second frame body so as to be rotatable around the longitudinal axis and movably in the left-right direction is provided.
The sheet movement based on the driving of the electric motor is a front-back parallel movement of the movable bracket accompanying the integral back-and-forth movement of the two bodies when the movement restriction control means is in the movable state, and when the movement restriction control means is in the movement restriction state. It is characterized in that the movable bracket is configured to swing about a vertical axis with the first shaft support portion of the movable bracket as a support axis accompanying the forward and backward movement of only the second frame body.

According to the present invention, with this configuration, the seat can be moved back and forth and oscillate left and right by using an electric motor. The structure and simplification of the structure can be measured.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a driver seat provided in a vehicle such as a private car or a truck.
The present invention has been implemented. That is, the electric moving device 2 for the seat 1 in which the present invention is implemented is disposed below the seat 1 so that the seat 1 can automatically perform the front-back parallel movement and the left-right swing. I have.

That is, an electric motor 4 constituting an electric moving device 2 is provided at the front of a movable bracket 3 integrally provided on the bottom surface of the seat 1, and an output shaft is provided from the electric motor 4. The output shaft 4a projects in both left and right directions, and both ends of the output shaft 4a are input to first and second reduction gear mechanisms (same in reduction ratio) 5, 6. Reference numerals 8 and 9 denote first and second screw shafts whose axes are oriented in the front-rear direction and rotate around the shafts in connection with the drive of the electric motor 4, and after the screw shafts 8 and 9. The end is rotatably provided on a support portion 3a provided at the rear end edge of the movable bracket 3, and the front ends of the screw shafts 8, 9 are connected to the reduction gear mechanisms 5, 6, and are electrically driven. The driving force of the motor 4 is transmitted in a decelerated state. Incidentally, the reduction gear mechanism 5,
The pins 5a, 6a protruding from the casing 6 are mounted and supported on a support portion 3b provided at the front end of the movable bracket 3.

Further, the first and second screw shafts 8 and 9 are provided with first and second frame bodies 10 and 11, respectively.
The first and second frame bodies 10 and 11 are screwed together so as to be able to move back and forth in the axial direction of the screw shafts 8 and 9 based on the relative rotation of the screw shafts 8 and 9. That is, the first piece 1
Numeral 0 is formed in a cylindrical shape, a screw groove 10a screwed to the first screw shaft 8 is formed on an inner peripheral surface thereof, and a spline groove-like engaging groove 10b is formed at a central portion of the outer peripheral surface. And a box-shaped casing 1 at both front and rear ends of the outer peripheral surface.
2 (corresponding to the support of the present invention) is rotatably supported via a bearing 13. 14 is a casing 12
The actuator 14 is provided integrally with the actuator, and corresponds to the movement control means of the present invention. The actuator 14 is configured so that the engaging pin 14a is moved in and out by a switch operation (not shown). And when the engagement pin 14a projects, the engagement pin 1
4a is engaged with the engaging groove 10b formed in the first frame 10, thereby restricting the rotation of the first frame 10. In this state, the first frame 10 is integrated with the casing 12. When the first screw shaft 8 rotates, the first frame 10 can move relative to the casing 12 in the front-rear direction (corresponding to the "movable state" of the present invention). When the engagement pin 14a is retracted, the engagement of the engagement pin 14a with the engagement groove 10b is released, and the integration with the casing 12 is released. When the one screw shaft 8 rotates, the one screw shaft 8 rotates together with the first screw shaft 8, so that the first frame 10 is in a movement restricting state in which there is no relative movement in the front-rear direction with respect to the first screw shaft 8. Is configured. Incidentally, the first screw shaft 8 of the first frame 10
The rotation of the bearing 13 interposed between the casing 12 and the first frame 10 is caused by the rotation of the first frame 10.
This is ensured by the fact that it is smaller than the rotational resistance of the screw groove fitting between the screw shaft and the first screw shaft 8. The second frame 11 has a substantially rectangular outer shape, and a screw groove 11a with which the second screw shaft 9 is screwed is formed on the inner peripheral surface thereof. In a state in which the casing is housed in the casing 12, the rotation of the piece itself is restricted by being locked to the inner surface of the casing 12, and the casing is integrated with the casing 12, whereby the first The two-piece body 11 is configured to move back and forth based on the relative rotation of the second screw shaft 9 together with the casing 12.

On the other hand, reference numeral 15 denotes a fixed bracket integrally provided on the vehicle body side, and a portion of the fixed bracket 15 facing the first piece 10 has a lower end of a casing 12 of the first piece 10. A hole for supporting the support pin 12a protruding from the portion only rotatably about the vertical axis, that is, the first shaft support portion 15a, and the support pin 12b protruding from the lower end of the casing 12 of the second frame body 11 around the vertical axis. A long hole that supports the first pivot support 1 so as to be freely rotatable and movable in the left-right direction.
5b. Then, as described above, when the engaging pin 14a of the actuator 14 projects to be in a movable state in which the engaging pin 14a is engaged with the engaging groove 10b of the first frame 10, the first frame 10 is moved to the second frame. Similar to 11, the front and rear relative movement of the two screw shafts 8 and 9 are simultaneously and integrally performed based on the relative rotation of the screw shafts 8 and 9, whereby the movable bracket 3 is configured to move in the front and rear parallel with the seat 1. on the other hand,
When the engagement pin 14a is retracted to enter a movement-restricted state in which the engagement with the engagement groove 10b is released, the first frame 10
Does not move forward and backward relative to the first screw shaft 8 because it rotates together with the first screw shaft 8, and only the second frame 11 moves forward and backward relative to the second screw shaft 9. As a result, the second frame 11 is
The movable bracket 3 moves back and forth relative to the second screw shaft 9 in a state where the movable bracket 3 is guided left and right by the first shaft support portion 15a. It is configured to operate. Incidentally, the forward / reverse drive control of the electric motor 4 and the operation control of the actuator 14 can be appropriately performed using switches.

In the embodiment of the present invention constructed as described above, as described above, when it is desired to translate the seat 1 in the front-rear direction, the actuator 14 provided on the casing 12 of the first frame 10 is replaced with an actuator 14. The electric motor 4 may be driven forward and reverse in a movable state in which the electric motor 4 is engaged with the engagement groove 10 b formed in the first frame 10. The electric motor 4 may be driven forward and reverse in the movement restricted state in which the engagement with the engagement groove 10b is released.

That is, the engaging pin 14 of the actuator 14
When the first frame 10 is moved to a movable state integrated with the casing 12, the first frame 10 has the same configuration as the second frame 11, and the two frames 1 are rotated based on the rotation of the screw shafts 8 and 9.
Nos. 0 and 11 perform simultaneous front-to-back relative movement, whereby the seat 1 moves back and forth in parallel. On the other hand, when the engagement pin 14a of the actuator 14 is immersed and the movement is restricted, the front-rear relative movement with respect to the screw shafts 8 and 9 is:
The first frame 10 is regulated and controlled so that only the second frame 11 performs. As a result, the movable bracket 3
Means that the second frame 11 swings right and left about the first support shaft 15a of the first frame 10 while being guided in the left and right directions by the second pivot 15b.

As described above, in the present invention, the front-back parallel movement and the left-right swing of the seat 1 are performed by the electric driving force. The electric motor 4 is used, and the actuator 14 can be selectively used depending on whether the actuator 14 is in or out, and it is not necessary to use a dedicated electric motor and its moving mechanism. As a result, parts for performing the forward and backward movement and the left and right swinging of the seat 1 are largely shared, so that the number of parts can be reduced, and the apparatus itself can be reduced in weight and size and simplified, and assembling work becomes complicated. It is possible to keep the cost low. Moreover, in this device, the front-rear parallel movement and the left-right swing can be performed by the single electric motor 4, but the front-rear relative movement of the first frame body 10 with respect to the first screw shaft 8 by the actuator 14. It is only necessary to perform the switching control between the allowance and the regulation, thereby simplifying the structure and contributing to further reduction in weight and size.

[0012]

In summary, since the present invention is constructed as described above, in order to perform the front-back parallel movement of the sheet, the movement restriction control means provided on the support of the first frame is provided by the first frame body. It is sufficient to drive the electric motor forward / reverse in the movable state. That would be good.

That is, when the movement restricting control means makes the first frame movable, the first frame has the same structure as the second frame, and the two frames are rotated based on the rotation of both screw shafts. At the same time, the sheet moves in the front-rear direction. On the other hand, when the movement restricting control means sets the movement restriction state of the first frame, the first frame is restricted from moving back and forth relative to the first screw shaft, and only the second frame is moved back and forth relative to the second screw shaft. As a result, the movable bracket is moved relative to the first pivot of the first frame while the second bracket is guided in the left-right direction by the second pivot. Left and right swinging.

As described above, the front-back parallel movement and the left-right swing of the seat are performed by the electric driving force. The front-back parallel movement and the left-right swing are performed by using one electric motor.
By switching the movement restriction control means between the movable state and the movement restricted state, the movement restriction control means can be selectively used, and there is no need to use a dedicated electric motor and its movement mechanism. As a result, parts for moving the seat back and forth and swinging from side to side are largely shared, reducing the number of parts, reducing the weight and size of the apparatus itself, simplifying the assembly, and complicating assembly work. There is no cost and the cost can be kept low. Moreover, in this device, while the front-back parallel movement and the left-right swing can be performed by a single electric motor, the movement restriction control means controls the front-back relative movement of the first frame relative to the first screw axis. Only the switching control between the allowance and the regulation may be performed, so that the weight and size can be further reduced.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a sheet.

FIG. 2 is an exploded perspective view showing an electric seat moving device.

FIG. 3 is an explanatory view of an operation of the electric seat moving device.

FIG. 4 is a sectional view of the first frame portion taken along line AA.

FIG. 5 is a sectional view taken along line BB of the first frame portion.

FIG. 6 is a cross-sectional view of the second frame portion taken along line CC.

[Explanation of symbols]

 Reference Signs List 2 electric moving device 3 movable bracket 4 electric motor 8 first screw shaft 10 first frame 10b engaging groove 12 casing 14 actuator 14a engaging pin 15 fixed bracket 15b second shaft support

Claims (1)

(57) [Scope of request for utility model registration] An electric motor capable of performing forward / reverse drive control on a movable bracket provided integrally with a sheet for moving a sheet based on forward / reverse drive of the electric motor;
An axial center line is oriented in the front-rear direction, and first and second screw shafts that rotate around the axial center in connection with driving of the electric motor are provided,
Each of these screw shafts is provided with first and second pieces screwed together so as to be able to move back and forth in the axial direction based on the relative rotation of the corresponding screw shafts, and the first piece is rotatable. The first support body is pivoted relative to the first screw shaft to move back and forth, and the first support body is rotated integrally with the first screw shaft. A movement restriction control means for switching to a movement restriction state for restricting movement is provided, while the fixed bracket on the vehicle body side supports the support of the first frame only rotatably about the longitudinal axis. Providing a first pivot portion and a second pivot portion that supports the second frame body so as to be rotatable about the vertical axis and movably in the left-right direction, and restricts sheet movement based on driving of the electric motor. When the control means is in a movable state, the movable bracket is associated with the integrated forward and backward movement of the two bodies. When the movement restriction control means is in the movement restriction state, the movable bracket is pivoted about the vertical axis with the first shaft support portion of the movable bracket as a support axis in accordance with the forward and backward movement of only the second frame. An electric vehicle moving device for a vehicle seat, comprising: