JPH0241073Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is an automobile seat moving device, specifically, the front end of the seat cushion is pivoted to the free end of a link that is swingably pivoted to the vehicle floor. The present invention relates to an automobile seat moving device in which the seat cushion can be moved back and forth across the top dead center of the link by swinging the link.

(Prior art) Generally, this type of moving device is
As shown in Japanese Patent No. 18570, a link is pivotally connected to the floor panel, and the front end of the seat cushion constituting the seat is pivotally connected to the free end of the link, while the rear end of the seat cushion is pivotally connected to the free end of the link. A slide device is interposed between the seat cushion and the floor panel, and by holding the front end of the seat cushion in your hand and pushing and pulling it back and forth, the link swings back and forth, and the seat is moved back and forth. It is designed to be moved.

(Problems to be Solved by the Invention) However, according to the above-mentioned moving device, the seat is heavy, and as the seat is moved back and forth by pushing and pulling operations, the swinging of the link causes In particular, since the front end side of the seat cushion vibrates up and down at the same time as it moves back and forth, when the seat is moved back and forth, while the inclined link swings to the upright position, in other words, the In the first half of the seat movement operation, a large operating force is required to push and pull the seat back and forth, and furthermore, at the end of the seat movement forward and backward, the front end side of the seat cushion is There is also a problem where it descends rapidly and makes unpleasant noises.

The present invention was developed in view of the above circumstances, and the purpose is to provide a seat moving device that can smoothly move the seat back and forth with a small operating force. .

(Means for Solving the Problems) In order to achieve the above-mentioned objects, the present invention pivots the front end of the seat cushion to the free end of a link that is swingably pivoted to the vehicle floor. A moving device for an automobile seat in which the seat cushion can be moved back and forth across the top dead center of the link by swinging of the link, the seat cushion being linked to the seat cushion or a fixed member fixed to the link. A torsion spring having locking portions at both ends is provided between the torsion spring, and each locking portion of the torsion spring is bent by swinging back and forth across the top dead center of the link, and The seat cushion is engaged with the link or the fixing member so that a torsion spring generates a spring reaction force that urges the link in a direction opposite to the swinging direction.

(Function) According to the present invention, when the seat moves in the front-rear direction, as the link swings back and forth across the top dead center, the torsion spring causes the link to swing back and forth in a direction different from the swing direction. Since a spring reaction force is generated that biases the seat in the opposite direction, when the seat is moved forward or backward, the torsion spring does not act until the link tilted in one direction swings and stands up. The generated spring reaction force helps push and pull the seat, and as the link tilts in the other direction from the upright position, the spring reaction force generated again on the torsion spring causes the seat cushion to This prevents the water from falling rapidly.

(Embodiment) An embodiment of the sheet moving device according to the present invention will be described below based on the drawings.

In the figure, 1 is a floor panel, 2 is a seat consisting of a seat cushion 3, and a seat back 4 supported at the rear end of the seat cushion 3 via a hinge fitting 40, It is installed so that it can move freely by a predetermined amount forward and backward in the direction of travel.

Specifically, L-shaped support brackets 51, 51 are fixed to positions corresponding to both sides of the front end of the seat cushion 3 on the floor panel 1, and links 5, 51 are attached to the support brackets 51, 51, respectively. 5 in a swingable manner in the front-rear direction, and
A connecting pipe 52 is spanned between the free ends of the links 5, 5, and both ends of the connecting pipe 52 are fixed to the links 5, 5 by welding. A pair of connecting brackets 32, 32 are fixed to the connection frame 31, and the free ends of the links 5, 5 are pivotally connected to the connecting brackets 32, 32.

Further, guide rails 33 extending back and forth are fixed to positions corresponding to both rear end portions of the seat cushion 3 on the floor panel 1, while brackets 34 extending downward are fixed to both rear end portions of the seat cushion 3. A slide pin 36 that slides within the guide hole 35 of the guide rail 33 is fixed to the bracket 34.

However, in the embodiment shown in the figure, in the seat moving device constructed as described above, the cushion frame 31 and the connecting pipe 52
A torsion spring 6 was installed between the two as shown below.

That is, in the embodiment shown in the figure, a torsion spring 6 made of a spring steel bar (torsion bar) is used, and both longitudinal ends of the torsion spring 6 are bent at 90 degrees in opposite directions. The second locking portions 61 and 62 are integrally formed, the torsion spring 6 is disposed between the cushion frame 31 and the connecting pipe 52, and the first locking portion 61 is connected to the cushion. The second locking portion 62 is locked to the frame 31 and the connecting pipe 51, and the torsion spring 6 is twisted by swinging back and forth around the top dead center of the link 5. Therefore, the spring 6 is configured to generate a spring reaction force that urges the links 5, 5 in a direction opposite to the swinging direction.

Next, the operation of the moving device having the above configuration will be explained.

FIG. 1 shows a state in which the seat 2 is moved rearward, and in this state, the links 5, 5 swing and tilt from the top dead center indicated by the two-dot chain line in FIG. Therefore, a spring reaction force is generated in the torsion spring 6 that urges the links 5, 5 forward in the direction of travel of the vehicle.

In order to move the seat 2 forward from the suspended state, for example, the seat cushion 3
All you have to do is hold the front end of the seat cushion 3 in your hand and pull it forward, and by pulling the seat cushion 3 forward, the links 5, 5 move forward from the position shown by the solid line in FIG. (counterclockwise in the figure),
The seat 2 moves forward.

By the way, when the seat 2 moves forward, while the links 5, 5, which were tilted backward, swing to the top dead center, the links 5, 5 gradually move the front end side of the seat cushion 3. Conventionally, it was necessary to increase the force for pulling the seat 2, and as the links 5 swung and tilted further forward from the position beyond the top dead center,
Since the front end side of the seat cushion 3, which has once been raised, gradually descends, the force required to pull the seat 2 forward is smaller than that described above. The front end side of the cushion 3 may drop rapidly and a loud collision sound may be generated at the end of the forward movement of the seat 2.

However, in the embodiment shown in the figure, during the forward movement of the seat, while the links 5, 5 tilting backward swing to the top dead center, the torsion spring 6 is affected. Due to the action of the spring reaction force that tends to bias the links 5, 5 forward, the operating force for moving the seat 2 forward is reduced, and the links 5, 5 are pushed upward. As the torsion spring 6 swings and tilts further forward from the position beyond the dead center, a spring reaction force is generated in the torsion spring 6 that tends to bias the links 5, 5 rearward. 6 plays the role of a so-called cushion material, and the rapid descent of the seat cushion 3 is suppressed.

It goes without saying that similar effects can be expected when the seat 2 is moved from the front to the rear.

In the above embodiment, the second locking portion 62 of the torsion spring 6 is locked to the connecting pipe 52, but it may be locked to the link 5.

(Effects of the Invention) As described above, the present invention pivots the front end of the seat cushion to the free end of a link pivotally connected to the vehicle floor so that the seat cushion can swing freely. In a moving device for an automobile seat in which a cushion can be moved back and forth between the top dead center of the link, locking portions are provided at both ends between the seat cushion and the link or a fixed member fixed to the link. A torsion spring is provided, each locking portion of the torsion spring is bent by swinging back and forth around the top dead center of the link, and the link is caused to swing by the torsion spring. Since the seat cushion is engaged with the link or the fixing member so as to generate a spring reaction force that urges the seat in the opposite direction, when the seat is moved forward or backward, the tilted Until the link swings and stands up, the spring reaction force generated in the torsion spring helps push and pull the seat, and as the link tilts from the upright position, the torsion spring The rapid descent of the seat cushion is suppressed by the action of the spring reaction force generated again, and therefore, overall, the seat can be moved back and forth smoothly with less operating force than before. This led to this.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a seat to which a moving device according to the present invention is applied, and FIG. 2 is a perspective view of the moving device. DESCRIPTION OF SYMBOLS 1... Floor panel, 2... Seat, 3... Seat cushion, 5... Link, 6... Torsion spring, 61... First locking part, 62... Second locking part.

Claims (1)

[Scope of utility model registration request] The front end of the seat cushion is pivotally supported on the free end of a link that is pivotally connected to the vehicle floor, and the swing of the link causes the seat cushion to
In the automobile seat moving device which can be moved back and forth by holding the top dead center of the link, the seat cushion has a locking portion at both ends between the seat cushion and the link or a fixed member fixed to the link. A torsion spring is provided, and each locking portion of the torsion spring is bent by swinging back and forth across the top dead center of the link, and the torsion spring is configured to bend the locking portion of the torsion spring by swinging the link back and forth across the top dead center of the link. A moving device for an automobile seat, characterized in that the seat cushion is engaged with a link or a fixing member so as to generate a spring reaction force that urges the seat cushion in the opposite direction.