JP5589798B2 - Cushion length variable seat - Google Patents

Description

  The present invention relates to a cushion length variable seat.

Conventionally, a cushion length variable seat is disclosed in Patent Document 1, for example.
In this case, by operating the operation portion by a seat cushion occupant, the cushion length of the seat cushion is shortened and extended within a set range.
That is, when extending | stretching the cushion length of a seat cushion, an actuator is operated by operating an operation part by a seated person.
And while extending | stretching an expansion-contraction rod member, a roller is pushed and moved to the front and, thereby, the cushion length of a seat cushion is extended. Here, the actuator is stopped by operating the operation unit by a seated person.

JP-A-6-284940

  By the way, in the cushion length variable seat disclosed in Patent Document 1, when the cushion length of the seat cushion in the shortened position is extended, the seat occupant operates the actuator to operate the actuator, thereby increasing the cushion length. After the extension, the actuator must be stopped by operating the operation unit. For this reason, it is assumed that the stop of the actuator is delayed by the operation of the seated person's operation unit, and it becomes difficult to extend the cushion length in an optimal state.

  In view of the above problems, an object of the present invention is to provide a cushion length variable seat that can extend the cushion length of a seat cushion to an optimum state.

In order to solve the above-mentioned problem, the cushion length variable seat according to claim 1 of the present invention is cushioned by moving the front side portion of the cushion pad in the front-rear direction by being moved in the front-rear direction by the cushion pad and the actuator. A cushion length variable seat comprising a movable member that changes the length,
On the movable member side, a detector that is operated by pressure when the front side portion of the cushion pad is displaced forward and brought into contact with a lower limb of a seated person and that stops the actuator is disposed ,
The movable member has a front plate portion in which a recess is formed,
The pressure at the front opening of the recess along the back side of the front portion of the cushion pad, and the pressure by which the detector is operated by rotating by the pressure when the cushion pad comes into contact with the lower leg of a seated person The actuating member is pivotally mounted,
The pressure actuating member constitutes a housing space for the detector in cooperation with the recess, and is biased to a return position where the detector is not actuated by a return spring .

According to the said structure, when extending | stretching the cushion length of a seat cushion, a seated person operates an operation part and operates an actuator. Accordingly, the cushion length is extended by moving the movable member forward and displacing the front portion of the cushion pad forward.
At this time, the detector is activated by the pressure with which the front portion of the cushion pad comes into contact with the lower limb of the seated person, thereby stopping the actuator.
For this reason, delay of the stop of the actuator is avoided, and the cushion length can be extended in an optimum state.
The pressure actuating member forms a storage space for the detector in cooperation with the recess formed in the front plate portion of the movable member, and the detector can be protected by storing the detector in the storage space. In addition, the malfunction of the detector can be prevented.

The cushion length variable seat according to claim 2 is the cushion length variable seat according to claim 1 ,
Wherein the retract and space, one detector is provided,
The pressure actuating member is formed in a horizontally long plate shape having a length dimension equal to or close to the width dimension of the front portion of the cushion pad.

According to the above configuration, the pressure actuating member is formed in a horizontally long plate shape having a length dimension equivalent to or close to the width dimension of the front side portion of the cushion pad, so that the lower limbs of the seated person are biased to the left and right parts, Or even if it exists in the state extended to right and left, a pressure action member act | operates without a malfunction by the pressure when a cushion pad contact | abuts a seated person's leg.
For this reason, it becomes possible to operate one detector without malfunction by the pressure operation member that operates by the pressure that the front side portion of the cushion pad contacts the lower limb of the seated person, and it is not necessary to arrange a large number of detectors. That's it.

It is a side view which fractures | ruptures and shows a part of seat cushion of the cushion length variable seat which concerns on Example 1 of this invention. It is a sectional side view which shows the arrangement | positioning state of the movable member, actuator, pressure action member, and detector which are similarly arrange | positioned at the front side part of the cushion pad of a seat cushion. It is a perspective view which shows the arrangement | positioning state of the movable member of the state which fractured | ruptured the cushion pad of the seat cushion similarly, the pressure action member, and the detector. It is a sectional side view showing the state where the front side portion of the cushion pad of the seat cushion was also pushed forward and extended.

  A mode for carrying out the present invention will be described according to an embodiment.

A first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a cushion length variable seat 1 that constitutes a vehicle seat includes a seat cushion 10 and a seat back 2 that is disposed at a rear portion of the seat cushion 10 so as to be adjustable in inclination by a reclining device (not shown). And.
As shown in FIGS. 1 and 2, the seat cushion 10 is mainly composed of a cushion frame 11 and a cushion pad 21 covered with an outer skin 20.

As shown in FIG. 2, the front portion 22 of the cushion pad 21 is extended downward from a bending follower 23 formed in a corrugated side cross-section to enhance the bendability, and the tip of the bent follower 23. The front end 24 is integrated and continuous.
Moreover, as shown in FIG. 3, the pad material is removed in the state where the skin is left on the left and right side portions of the front end portion 24. A slide body 33 having a U-shaped section, a U-shape, a J-shape, or the like is fixed to the inner surface of the skin portion 20a left on both left and right sides by a hook member (clip), an adhesive, or the like. .
The left and right slide bodies 33 are slidably fitted into both end portions 32 a of the slide base 32.
The slide base 32 may be fixed to a movable member (movable frame) 50 described below, or may be fixed to a support member (not shown) separate from the movable member 50.

  As shown in FIG. 2, below the front portion 22 of the cushion pad 21, the cushion length of the cushion pad 21 includes a minimum shortened position indicated by a solid line in the figure and a maximum extended position indicated by a two-dot chain line in the figure. The actuator 42 which comprises the drive device which can be changed between, and the movable member 50 are provided.

The actuator 42 is configured by an interlocking mechanism 44 that operates using a motor (reversible motor) 43 as a drive source. The operating tip of the interlocking mechanism 44 is connected to the movable member 50 to connect the movable member 50 to a shaft 52 below it. It is made to rotate to the front-back direction centering on.
As the interlocking mechanism 44, a link mechanism, a gear mechanism, a slider mechanism, etc., or a combination mechanism of two or more of these mechanisms can be used.

As shown in FIGS. 2 and 3, the movable member 50 is attached to a bracket 12 whose lower end extends from the cushion frame 11 so as to be rotatable about a shaft 52.
Further, the movable member 50 includes a front plate portion 53 having a width dimension equal to or close to the width dimension of the front portion 22 of the cushion pad 21, and a shaft 52 extending rearward from the upper edge of the front plate section 53. A cushion support portion 54 that is bent into an arc shape around the center and supports the back surface (lower surface) of the front side portion 22 of the cushion pad 21, and right and left sides that are bent at right angles from the left and right side edges of the front plate portion 53 toward the rear. The both side plate portions 55 are integrally provided.
The lower part of the left and right side plate portions 55 of the movable member 50 is attached to the bracket 12 of the cushion frame 11 so as to be rotatable about the shaft 52.

  On the movable member 50 side, the front portion 22 of the cushion pad 21 is displaced forward and is operated by pressure when it is brought into contact with the lower limb A of the seated person, and the motor 43 that forms the drive source of the actuator 42 is stopped. A detector 70 is provided. For example, a push switch can be used as the detector 70.

As shown in FIG. 2, a concave portion 56 is formed on the upper portion of the front plate portion 53 of the movable member 50, and the front opening portion of the concave portion 56 extends along the back side of the front portion 22 of the cushion pad 21 and is seated. A pressure actuating member 61 is attached to actuate the actuator 71 of the detector 70 by rotating with the pressure when the cushion pad 21 comes into contact with the lower limb A of the person through the epidermis 20.
The pressure actuating member 61 constitutes a storage space 58 of the detector 70 in cooperation with the recess 56 and is mounted so as to be rotatable around the pin 62 at the lower part thereof.
Further, the pressure operating member 61 is biased by a return spring 65 toward a return position (standby position) in contact with the stopper 66.
In the first embodiment, the pressure actuating member 61 is formed in a horizontally long plate shape having a length dimension equal to or close to the width dimension of the front portion 22 of the cushion pad 21.
In the first embodiment, one detector 70 is mounted on the bottom surface of the concave portion 56 of the movable member 50 that constitutes the storage space 58 in cooperation with the pressure operating member 61.

  The detector 70 is connected to a control device 80 that controls the motor 43 of the actuator 42. In addition, an operation switch (operation unit) 81 that is connected to the control device 80 and that rotates the motor 43 forward and backward is disposed at a position that can be operated by a seated person of the cushion length variable seat 1 (FIG. 2). reference).

The cushion length variable seat according to the first embodiment is configured as described above.
Therefore, when the cushion length of the seat cushion 10 arranged at the shortened position indicated by the solid line in FIG. 2 is extended as indicated by the two-dot chain line in FIG. 2, the seated person operates the operation switch 81 to The motor 43 is rotated in one direction (for example, the positive direction). Then, by the interlocking mechanism 44, the movable member 50 is rotated forward about the shaft 52 in the counterclockwise direction toward FIG.
As a result, the front portion 22 of the cushion pad 21 is displaced forward, and the cushion length is extended.
At this time, as shown in FIG. 4, the actuator 71 of the detector 70 is pressed by the pressure at which the front portion (the portion of the epidermis 20) 22 of the cushion pad 21 comes into contact with the lower leg (mainly the calf portion) A of the seated person. Actuates and thereby stops the motor 43 of the actuator 42.
For this reason, compared with the case where the motor is stopped by a conventional manual operation, delay of the stop of the motor 43 of the actuator 42 is avoided, and the cushion length can be extended in an optimum state.

  Further, since the detector 70 can be housed and protected in the housing space 58 between the movable member 50 and the pressure actuating member 61, malfunction of the detector 70 can be prevented.

  Further, the pressure actuating member 61 is formed in a horizontally long plate shape having a length dimension equal to or close to the width dimension of the front portion 22 of the cushion pad 21, so that the lower limb A of the seated person is biased to the left and right parts. Even in a state where the front side portion 22 of the cushion pad 21 is in contact with the lower limb A of the seated person, the pressure actuating member 61 operates without malfunction even in a state where the front part 22 of the cushion pad 21 is in contact with the seated leg. For this reason, one detector 70 can be operated without malfunction, and a large number of detectors need not be provided.

A seated person presence / absence detector for detecting the presence / absence of a seated person may be disposed on the seat cushion 10 and the seated person presence / absence detector may be connected to the control device.
In a state where it is detected that there is no seated person, the motor 43 of the actuator 42 is kept stopped even if the operation switch (operation unit) is operated, and the presence of the seated person is detected. Thus, the motor 43 of the actuator 42 can be operated (forward / reverse) by operating the operation switch (operation unit).
When the seated person leaves the cushion length variable seat, the presence / absence of the seated person is detected by the seated person presence / absence detector to reverse the motor 43 of the actuator 42, and the solid line in FIG. It is also possible to configure so that the movable frame 51 is reset to the retracted end position, as shown in FIG.

In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can also be implemented with a various form.
For example, in the first embodiment, the case where the detector 70 is mounted on the bottom surface of the concave portion 56 of the movable member 50 is illustrated, but the detector 70 may be mounted on the inner surface of the pressure operating member 61.

DESCRIPTION OF SYMBOLS 10 Seat cushion 11 Cushion frame 21 Cushion pad 22 Front part 42 Actuator 43 Motor 44 Interlocking mechanism 50 Movable member 56 Recessed part 58 Storage space 61 Pressure actuating member 70 Detector

Claims (2)

A cushion length variable seat comprising a cushion pad and a movable member that is moved in the front-rear direction by an actuator to displace the front side portion of the cushion pad in the front-rear direction to change the cushion length,
On the movable member side, a detector that is operated by pressure when the front side portion of the cushion pad is displaced forward and brought into contact with a lower limb of a seated person and that stops the actuator is disposed ,
The movable member has a front plate portion in which a recess is formed,
The pressure at the front opening of the recess along the back side of the front portion of the cushion pad, and the pressure by which the detector is operated by rotating by the pressure when the cushion pad comes into contact with the lower leg of a seated person The actuating member is pivotally mounted,
The pressure actuating member forms a housing space for the detector in cooperation with the recess, and is biased to a return position where the detector is not actuated by a return spring. . The cushion length variable seat according to claim 1 ,
Wherein the retract and space, one detector is provided,
The variable pressure seat according to claim 1, wherein the pressure actuating member is formed in a horizontally long plate shape having a length that is equal to or close to the width of the front portion of the cushion pad.

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