JPH0534440Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a seat lifter in a vehicle seat device.

[Prior Art] In general, various configurations of vehicle seat systems are devised to ensure the comfort of the occupants, but in particular for the front seats of automobiles, it is difficult to ensure the optimal driving position for the driver and passenger. For ease of use, a seat lifter is often used in which the front and rear parts of the seat can be raised and lowered independently. A seat lifter is a lower frame in which an upper frame such as a seat frame or seat pan that fixes a seat cushion is fixed to the vehicle body in pairs on the left and right sides via links that are pivoted in pairs on the front and rear parts of the upper frame. One of the base plates is provided with an operating mechanism for rotating the link. The operating mechanism includes a shaft having an operating knob pivoted on one end, a pinion pivoted on the other end of the shaft, and the pinion engaged with the sector gear;
One end of a connecting rod is rotatably attached to the sector gear, the other end is rotatably attached to the link, and a brake unit is provided for locking rotation of the pinion. In order to reduce the rotational force of the operating knob, a spring is mounted between the link and the lower frame to bias the link to rotate so as to constantly lift the upper frame. This spring uses a tensile coil spring or torsion spring (see, for example, JP-A-57-58522, JP-A-60-56642, and JP-A-61-24631). ).

[Problems to be Solved by the Invention] However, according to the above conventional seat lifter, the coil spring is formed into a hook shape at both ends thereof, and a metal fitting or the like to which the hook portion is attached is attached. Because of this, many parts and space are required for installation, and in particular, the connecting rod that connects the rear of the lower frame may have to be installed so as to protrude rearward. In addition, while the spring constant of a torsion spring is determined by its length,
The location where it should be installed is in the width direction of the seat lifter that connects the lower frames, and the width dimension is almost constant, so there are disadvantages such as difficulty in adjusting the operating force. It was hot.

Therefore, this invention was made for the purpose of improving the spring in the seat lifter.

[Means for solving the problem] In order to solve the above problem, this invention fixes the seat cushion through a pair of left and right links at the front and rear parts of the lower frame, which is fixed to the vehicle body as a pair on the left and right. An upper frame is mounted to be movable up and down, an operating mechanism for rotating the link is provided on one of the lower frames, and a link is provided between the pair of lower frames on the side that lifts the upper frame upward. In a seat lifter equipped with a torsion spring that rotationally biases the torsion spring, both ends of the torsion spring are bent into a hook shape, and the vicinity of one end is further bent to form a right-angled part. , one end of this torsion spring is locked in a recess formed in one end of at least one link pivoted to either one of the lower frames, and the torsion spring is engaged in a recess formed in the other end of this link. The right angle portion is hooked, and the other end of the torsion spring is hooked to the lower frame through a hole bored in one of the lower frames, and the other end of the torsion spring is hooked to the lower frame. The formed recesses constituted a seat lifter in which openings were formed in the same direction with respect to the rotational direction of the link.

[Operation] According to this invention having the above configuration, the torsion spring always biases the link in a direction to rotate in order to lift the seat frame upward.
Therefore, when the operating knob is rotated, the pinion is rotated, and the sector gear is rotated upward, the rotational operating force is reduced, as in the prior art. When assembling the torsion spring, the other end of the torsion spring is hooked to one of the lower frames, the link is positioned between one end of the torsion spring and the right angle part, and one end of the link is By rotating the link so that one end of the torsion spring is locked in the recess formed, the right angle part is locked in the recess formed at the other end of the link, and the connecting shaft with the link fixed at both ends is attached to the lower part. It can be easily assembled by being pivoted to the frame, and since the torsion spring is arranged diagonally in the width direction of the lower frame, its length can be adjusted so that the length is at least the specified width between the lower frames. Therefore, a torsion spring having a desired spring constant can be selected, and the range of adjustment for reducing the operating force is improved.

[Example] Next, an example of this invention will be described based on the drawings.

As shown in Figures 1 to 3, the reclining lower plate 1 and the upper slide rail 1
The lower frame 2 consisting of a is attached to a pair of left and right slide rails 3, 3a fixed to the vehicle body so as to be movable in the front-rear direction (arrows A and B). Note that the lower frame 2 has this slide rail 3,
It may be directly attached and fixed to the vehicle body via a bracket without using the bracket 3a. On the other hand, the reclining lower plate 1 and the upper slide rail 1
The upper frame 5 consisting of a seat pan sandwiched between the upper frame 5 and the upper frame 5 is mounted on the lower frame 2 so as to be movable up and down via a pair of left and right links 6, 6a, 6b, and 6c at its front and rear parts, respectively. Upper frame 5
Although configured as a seat pan, it may also be configured with a pair of left and right side supports. lower frame 2
An operating mechanism (spring brake device) 7, 7a is attached to one side of the substantially front part of one reclining lower plate 1, and its shaft 8, 8a
The pinions 9, 9a which are shaft-mounted to the notch holes 1b, 1
It is exposed to the other side from c and meshes with the sector gears 10 and 10a, respectively. The operating mechanisms 7, 7a have a known configuration and include operating knobs 11, 11a and braking mechanisms 12, 12a. Said sector gear 1
0 and 10a are rotatably supported on the reclining lower plate 1 by shaft pins 13 and 13a, respectively. As shown in FIG. 4, the shaft pin 13 has a flange 14 near the center of the pin.
A sector gear 10 is rotatably pivoted between the reclining lower plate 1 and the reclining lower plate 1. A pin 15 is implanted in the sector gear 10, and a plate 16 is connected via the pin 15 with a push nut 17. This plate 16 is fixed to a connecting shaft 18 by welding or the like, and the sector gear 1
I am facing 0. Further, one end of the link 6 is connected to the plate 16 via a pin 19 at the end opposite to the pin 15 . Connection shaft 1
8 consists of a pipe, one end of which is connected to the shaft pin 13.
The other end fits into the hole 36 of the other upper slide rail 1a and is rotatably supported by fitting the E ring 34, and the bracket 21 is attached. The other pair of links 6a is connected to each other via a pin 22. The links 6, 6a are pivoted into side holes 5a, 5a of a bracket fixed to the upper frame 5 by stepped collars 23, 23a and push nuts 24, 24a. On the other hand, the shaft pin 13a is a flat head pin, and a sector gear 10a is rotatably sandwiched between this and the reclining lower plate 1 and is pivotally attached to the sector gear 10a.
5 is implanted, and this pin 25 has a link rod 2.
6 is rotatably connected at one end with a push nut 27. The other end of the link rod 26 is connected to the link 6b with a pin 28 and a washer 29. This link 6b has a bell crank shape and has two pivot parts facing the pin 28, one of which is bored into the reclining lower plate 1 by fixing one end of the connecting shaft 18a by welding or the like. E-ring 3
1 is fixed and pivotally supported, and the other is a shaft pin 33 on a bracket 32 connected to the upper frame 5.
are connected. A link 6c and an E ring 34a, which are paired with the link 6b, are fitted to the other end of the connecting shaft 18a, and the shaft hole 6f of the link 6c is fitted.
is fitted into a shaft pin 33a protruding from the bracket 32a. The brackets 32, 32a abut against the rear portion of the upper frame 5, and are connected to the rear holes 5b, 5b with bolts 35, 35a.

On the other hand, between the lower frames 2, 2, a torsion spring 37 and a torsion spring 38 are disposed at the front and rear, respectively. As shown in FIG. 2, the torsion spring 37 is substantially the same as the conventional one, with one end bent into a hook shape hanging on the bracket 21, and the other end extending to the lower frame 2.
The bracket 21 is passed through a through hole 1d formed in the lower frame 2 and engaged with a vertically bent portion 2a on the periphery thereof, thereby urging the bracket 21 to rotate clockwise. Further, the torsion spring 38 has both ends 39 and 40.
are each bent into a hook shape, and the vicinity of one end 39 is further bent into a hook shape to form a right angle portion 4.
It consists of an elastic rod having 1 and one end 3
9 is latched to a recess 6e formed at one end of the link 6c, and the right-angled portion 41 is latched to a recess 6d formed at the other end of the link 6c. Here, the recesses 6d and 6e formed at both ends of the link 6c are opened in the same direction with respect to the rotational direction of the link 6c. The other end 40 of the torsion spring 38 passes through a through hole 1e formed in one of the lower frames 2, contacts a standing bent portion 2a formed on the periphery of the lower frame 2, and rotates counterclockwise to the link 6c. It has a rotational bias in the direction. The reason why the torsion spring 38 is arranged diagonally with respect to the lower frames 2, 2 is to obtain a dimension longer than the width dimension W between the lower frames 2, 2, and a spring constant having a somewhat large spring constant is used. It has been made possible.

To assemble the torsion spring 38, first insert the other end 40 into the through hole 1e of the lower frame 2.
39 to make it abut against the vertical bent portion 2a, and one end 39
The link 6c is positioned between the right angle portion 41 and the link 6c, and one end 39 is locked in a recess 6e formed at one end of the link 6c.
By rotating clockwise, the right angle part 41 is hooked into the recess 6d formed at the other end of the link 6c, as shown by the solid line in FIG. 5, and the links 6b,
The connecting shaft 18a with 6c fixed at both ends is inserted into a shaft hole 30 drilled in the lower frame 2, and is prevented from coming off with an E-ring 31 for pivotal support. Here, the link 6c rotates within the range shown by the solid line and the imaginary line in FIG. 5 by the rotation operation of the operating knob 11a, so the right angle portion 41 does not come off the recess 6d of the link 6c. Therefore, the torsion spring 38 is stabilized by the right angle part 41 being pushed toward the lower frame 2 side by the link 6c, so that the one end 39 always rotates the link 6c counterclockwise and has a predetermined spring property. The operation mechanism 7, 7a can generate a force that constantly lifts the upper frame 5 upward, and is arranged diagonally with respect to the lower frames 2, 2.
It is possible to finely adjust the degree of reduction in operating force that is convenient for operation.

In addition, in FIG. 1, 42 is a slide lock lever, which is a slide lock device 43 shown in FIG.
It extends forward from

To explain the operation of the above embodiment, when the operation knob 11 is rotated, the pinion 9 rotates via the operation mechanism 7 in FIG. 3, and the rotation of the pinion 9 rotates the sector gear 10. The movement causes the plate 16 to rotate in the same direction, causing the link 6 to swing. Therefore, when the sector gear 10 rotates clockwise around the shaft pin 13, the plate 16 rotates in the same direction via the pin 15, and the link 6 is pulled clockwise, causing the upper frame 5 to be pulled into the lower frame. Close to 2. on the other hand,
Conversely, if the sector gear 10 rotates counterclockwise around the shaft pin 13, the plate 16 rotates counterclockwise via the pin 15, and the link 6 rotates in the same direction. Lift the upper frame 5 upward. On the other hand, the bracket 21 is fixed to the other end of the connecting shaft 18 that fixes the plate 16 to one end, and is rotationally biased by a torsion spring 37, so the link 6a is rotated by the rotation of the link 6 and rotates clockwise. It can be rotated in any direction. Thus, by rotating the operation knob 11, the front portion of the upper frame 5 can be raised and lowered.
On the other hand, when the operation knob 11a is rotated, the sector gear 10a pulls or pushes the link rod 26 to swing the link 6b in the front-back direction, and the link 6c is attached to the other end of the connecting shaft 18a that fixes the link 6b at one end. Since it is fixed and rotationally biased by the torsion spring 38, it can rotate clockwise following the rotation of the link 6b. As a result, when the link rod 26 is pulled, the rear part of the upper frame 5 is lifted upward, and when the link rod 26 is pushed, the rear part of the upper frame 5 approaches the lower frame 2, that is, the operation knob 11 , 11a, the front and rear portions of the upper frame 5 can be raised and lowered separately, allowing the seated person to easily adjust the front and rear portions of the seat, or both, to a desired height. It can be adjusted by force.

[Effects of the invention] As explained above, according to this invention, the upper frame fixes the seat cushion through a pair of left and right links at the front and rear parts of the lower frame, which is fixed to the vehicle body in pairs on the left and right. is mounted to be movable up and down, one of the lower frames is provided with an operation mechanism for rotating the link, and between the pair of lower frames, the link is rotated to lift the upper frame upward. In a seat lifter in which a torsion spring is disposed, both ends of the torsion spring are bent into a hook shape, and the vicinity of one end is further bent to form a right-angled portion. One end of the spring is locked in a recess formed in one end of at least one link that is pivoted to either one of the lower frames, and the right angle part is fitted in a recess formed in the other end of the link. and the other end of the torsion spring passes through a through hole bored in one of the other lower frames and is hung in contact with a vertical bent portion formed in the lower frame,
Since the recesses formed at both ends of the link are opened in the same direction with respect to the direction of rotation of the link, the torsion spring has a right-angled portion that is pushed toward the lower frame by the link. By stabilizing the link, one end has a certain springiness that keeps the link rotating
By creating a force that constantly lifts the upper frame, it is possible to reduce the rotational force of the operation knob, and by arranging it diagonally to the lower frame, the length can be selected from long or short, making it easier to operate. The degree of reduction in operating force that is convenient for operating the mechanism can be finely adjusted. To assemble the torsion spring, hook the other end of the torsion spring to one lower frame, position the link between one end of the torsion spring and the right angle part, and attach the link to one end of the torsion spring. By rotating the link so that one end of the torsion spring is locked in the recess formed, the right angle part is locked in the recess formed at the other end of the link, and the connecting shaft with the link fixed at both ends is attached to the lower part. Since it can be easily assembled by being pivotally supported on the frame, the assembly work can be done simply and quickly. Furthermore, one end of the torsion spring is locked in a recess formed in one end of at least one link pivoted to either one of the lower frames, and
The right angle part is hooked into the recess formed at the other end of this link, and the other end of the torsion spring is passed through a through hole drilled in one of the other lower frames.
Since the torsion spring is hooked onto the lower frame, no separate member such as a bracket is required for mounting the torsion spring, and the number of parts can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and Fig. 1 is a perspective exploded view, Fig. 2 is a plan view, Fig. 3 is a cross-sectional side view of main parts, Fig. 4 is a partial cross-sectional plan view, and Fig. 5 is a main part. FIG. 2...Lower frame, 5...Upper frame,
6, 6a, 6b, 6c...link, 6d, 6e...
... recess, 7 ... operation mechanism, 38 ... torsion spring, 39 ... one end, 40 ... other end, 41 ...
...Right angle part.

Claims (1)

[Scope of utility model registration request] An upper frame that fixes a seat cushion through a pair of left and right links is mounted in a vertically movable manner on the front and rear parts of a lower frame that is fixed to the vehicle body as a pair of left and right, and on one of the lower frames, In the seat lifter, an operating mechanism for rotating the link is provided, and a torsion spring is disposed between the pair of lower frames to rotate and bias the link in a direction that lifts the upper frame upward. Both ends of the torsion spring are bent into a hook shape, and the vicinity of one end is further bent to form a right angle part, and one end of the torsion spring is pivoted to either one of the lower frames. The right angle portion is locked in a recess formed at one end of at least one link, and the right angle portion is locked in a recess formed at the other end of the link, and the other end of the torsion spring is connected to the lower frame. The link is hung on the lower frame through a through hole drilled in the other, and the recesses formed at both ends of the link are opened in the same direction with respect to the rotational direction of the link. A seat lifter that is characterized by the ability to