JPS6067234A - Seat lifter - Google Patents

Abstract

PURPOSE:To make a lever operation easy and improve operability, by rotating links in association with biased movement of a slider, and elevating a cushion frame to adjustingly retain the same by a lock device. CONSTITUTION:A pair of links 12 are mounted between a cushion frame 1 and a slider 11 so as to be rotatable relative to a support 21. A return spring 20 is mounted between the slider 11 and a fixed bracket 22, and the slider 11 is biasedly moved so as to elevate the cushion frame 1. A lock device 13 is provided between the slider 11 and the fixed backet 22 so as to adjustingly retain the movement of the slider 11. The slider 11 is biasedly moved to elevate the cushion frame 1, and adjustingly retain the cushion frame 1 at a desired height by the lock device 13.

Description

[Detailed description of the invention]

[Technical Field] The present invention relates to a seat lifter, and more particularly to a seat lifter that is improved so as to be able to adjust and hold a seat cushion at a desired height. [Prior Art] There is a conventional seat lifter as shown in FIG. In other words, the seat lifter is configured so that the height of the seat cushion can be adjusted and maintained according to the body shape of the sitting person.
A pair of parallel links 3Δ, 3 are interposed between the base 2 and the base 2, and are attached by pin connection. One link 3A has a fan shape, and a tooth groove 5 is formed on the circumferential edge of the circle. Teeth Ii6 that mesh with this tooth groove 5 are attached to the shirt l-4 rotatably passed between the cushion frames 1.1 on both sides, and the shirt 1-4 is rotated by the mesh of the tooth groove 5 and the gear G. The movement is transmitted to the parallel link 3, and the link mechanism allows the cushion frame 1 to move up and down. Therefore, in order to impart rotation to the shaft 4, the shirt 1
A coil-shaped return spring 7 is wound around ~4,
A locking device 8 is provided on the side of the cushion to the sea 1 so that the rotation of the shirt T-4 can be locked at a desired rotational angle position. However, in such a conventional seat lifter, the lock device 8 is equipped with a lock gear attached to the shaft 4, and the lock is achieved by meshing these gears, so a high degree of 11 degrees is required for the parts, which increases the number of processing and assembly steps. is increasing, leading to high costs. In addition, since the lock gears and the like are arranged sequentially in the axial direction, the device itself has a thickness in the axial direction.
It takes up space. Further, since the locking device 8 is configured to lock the rotation of the shaft 4 by meshing with locking gears, etc., the load applied to the lever 8Δ is large, and therefore the lever operation is heavy and the operability is poor. Moreover, since the lock Vi18 is directly connected to the shirts 1 to 4, it is necessary to cut out a part of the seat cushion or position the lever 8A on the outside in order to ensure the operating range of the lever. When designing the layout,
It has the disadvantage of being subject to restrictions. (Purpose) Therefore, this invention was made by focusing on such conventional problems, and its purpose is to rotate the link supporting the cushion frame as the slider r is biased and moved. Then move the cushion frame up,
The lock P device has a structure that can hold the cushion frame at a desired height, reducing the load on the lever, making lever operation easier, and improving operability. The lever operation range is reduced, the ease of installation is improved, and at the same time space is utilized more effectively. Also, the locking device is a locking mechanism with a pair of teeth engaged, and device parts are shared. An object of the present invention is to provide a seat lifter that enables cost reduction.(Example) Hereinafter, an embodiment of the present invention will be explained in detail based on the drawings. Fig. 2 shows a first embodiment of the present invention. An example is shown below. In this embodiment, as the slider 11 is biased and moved, the cushion frame-1
The cushion frame 1 is moved upward by rotating the link 12 supporting the cushion frame 1, and the cushion frame 1 can be adjusted and held at a desired height by the locking device 13. That is, the links 12 are located at the four corners of the seat cushion, and the control links 12.12 are arranged in a downward row at the front and rear ends of the cushion frame 1 extending in the front-rear direction, and function as parallel links. Each link 12 has a substantially triangular shape, the front and rear ends of the cushion frame 1 are connected via a support bracket 14 to the first apex 1G, and the slider 11 is connected to the second apex 17.
The front and rear ends are connected by pins. A seat 71-19 extending in the lateral direction is attached to the third apex 18, and is rotatably supported by a support base 21 provided on the floor. In addition, the longitudinal movement of the reslider 11 can be transmitted and converted into the vertical movement of the cushion frame 1 through the rotation of the link 12. stop

[, a return spring 20 is installed between the slider 11 and the fixed bracket 22 so that the cushion frame 1 is urged to move upward.
tJ Gj is interposed and taken away. For example, in this embodiment, the movement fft20II1wl is configured to be riff 1lit40++u11. A locking device 13 is provided for adjusting and holding the slider 11 at a desired position. A lower tooth plate 1-24 is formed in the middle of the slider 11 and has an upwardly facing tooth groove 23 on the upper part, and an upper tooth plate 26 that can be engaged with the i'WI 25 is formed on the lower edge thereof. is rotatably attached to the stationary browns 1 to 22, and has a laterally projecting bin 27 and a specially shaped front upper edge 28. Upper two spray [to 26
Operation plates 1 to 29, which can be rotated to engage the engagement with AR2 spray 1-24, are rotatably attached to the fixed Braun 1-22. ′! l, that is, 1↑f'i= An operating rod 1-31 is attached to the upper end of the plate 29, and is loosely inserted into an arc-shaped long hole 32 formed in the fixed brown 1-22, with a knob 34 at the tip. It is formed. And 29 to this operation play 1 is a long hole 32
J3, which can be rotated within the rotational angle regulated by
3'I is the front upper edge 28 of the upper tooth plate 2G
, and causes the plate 2G to rotate on the other hand, causing the tooth 25 to rotate.
The movement of the slurry rder 11 is locked by meshing with the tooth grooves 23. In addition, the operation plate 29
When the upper tooth spray 1-26 rotates forward, the upper tooth spray 1-26 rotates backward and the two operation plates engage with the pin 27 of the upper tooth spray 1-26 so that the lock can be released. An engaging portion 33 that can be fitted is formed in an R shape. Next, I will explain the effect. Figure ff12 shows a state in which the slider 11 has been moved forward and locked, and the cushion frame 1 is correspondingly at the lowest position. In order to adjust and hold the seat cushion at a desired height according to the body shape of the person sitting in this state, first, while the seat is on the seat, hold the knob 34 and rotate the operating plate 29 in the forward direction. Then, the rod 31 comes off the front edge 28 of the upper tooth plate 26, and the engaging portion 33 pushes up the pin 27 from below. As a result, the upper two spray (・2
6 rotates backward and disengages from the lower tooth plate 24, and the slider 11 becomes freely movable in the front and back direction. However, in 1), the return spring 20 is interposed between the slider f 11 and the fixed plug 22, and the slider 11 is pulled backward and moved. Along with this, the links 12.degree. 12 at the front end rotate in the counterclockwise direction centering on the shirt 1-19, and push up the support brackets 1 to 1/I upward. As a result, the cushion frame 1 moves upward against its own weight and, when positioned at a desired height, performs a locking operation while maintaining that height using the weight of the n-seated person. That is, when the knob 34 is rotated backward, the rods 1 to 31 engage with the front edge 28 of the upper two spray 1-26.
As the engaging portion 33 separates from the pin 27, the upper tooth spray 1-26 rotates forward and engages with the lower tooth plate 24, and this engagement causes the slider 1 to move forward.
1 movement is locked. As a result, the cushion frame 1 is adjusted and held at a desired height, allowing the seated person to sit comfortably. Next, FIG. 3 shows a second embodiment of the present invention. This embodiment has approximately the same structure as the first embodiment, but the slider 11
The difference is in the locking device 34 that restricts the movement of. In other words, O art two spray 1 of slider 11
The upper tooth spray 1-36, which can be engaged with the lever 38
is rotatably attached, and the rotation is subdivided in the forward direction by a return spring 39. The lever 38 and the upper tooth plate 36 are connected by a pin 40 and are configured to be interlocked. Since the operation of this embodiment is substantially the same as that of the first embodiment, the explanation of the same parts will be omitted and only the different parts will be explained. When it rotates upward, the upper two spray 1-36 also moves upward, and the lower hani J-'1bu It-I, Tsu4J-'s cup is "1-kuchi" I. Fig. 4 shows a thirteenth embodiment of the present invention. This embodiment, like the second embodiment, differs in structure from the first embodiment only in the locking device 42. In other words, a small wheel 44 that can be engaged with a pair of freely movable claws 46° 46 is fixedly attached to one end of the rotatably mounted shaft 43, and a small wheel 44 that can be engaged with a pair of freely movable claws 46 is fixedly attached to the other end. Lock gear 45 that can mesh with lower two spray 1-24 of slider 11
is fixedly attached. and a pair of claws 46.
46 is expanded against the ('-J force of the return spring 48, and the pawls 46 and 46 are disengaged from the small wheel 44.
Four cams are interposed between the cams and the cams and are rotatably mounted, and are configured so that they can be expanded using a lever 50. Regarding the operation of this embodiment (J1, similar to the second embodiment, only the different parts will be explained).When the lever 50 is rotated when the slider 11 is free to move, a pair of special shapes of the four cams are activated. Both claws 46.4G expand laterally against the biasing force of the return spring 48, and the wind turbine 4
4 Which engagement is disengaged, and the lock gear 45 becomes freely rotatable.
The lock will be released. In addition, this invention is not limited to the above-mentioned eggplant example,
It goes without saying that various applications and modifications are possible. For example, in this embodiment, the links are parallel links, but the link is not limited to this.
The front end of the cushion may be configured to move upward more rapidly than the rear end, thereby producing the Cyribo-1 effect. (Effects) As is clear from the above description, according to the present invention, the cushion frame located above is mounted interposed between the slider located below, and is rotatably provided on the support base. A pair of links, a slider and a fixed bracket
- A return spring is installed interposed between the slider and the fixed bracket, and provides a U-force movement to the slider as much as possible to move the tension frame as much as possible. Since the seat lifter is equipped with a locking device that maintains the slider movement by m, the upper tooth plate and lower tooth spray 1- of the lock Ml can be used as common parts of the device, resulting in excellent compatibility and cost savings. ~Down roar.In addition, since the meshing area can be made larger than before, it is possible to reduce tooth damage and reduce the load on the lever, making it easier to operate the lever. In addition, the locking device can be made compact and the operating range of the lever can be reduced, improving the ease of installation and making effective use of space.Furthermore, The effect of repeated use of the hat due to the inconvenient seat layout is reduced by 1'7.

[Brief explanation of the drawing]

Figure 1 shows a conventional seat lifter;
FIG. 3 is an exploded perspective view showing a seat lifter according to a first embodiment of the invention, FIG. 3 is a perspective view showing a locking device in a seat lifter according to a second embodiment of the invention, and
FIG. 4 shows a third embodiment of the invention! 1' is a perspective view similar to FIG. 3; 1...Cushion frame 1 11...Slider, 12...Link, 13...Lock device, 19...Shirt 1-, 20 ...Return spring, 21...
・Support stand, 22... Fixed bracket. Applicant Ikeda Bussan Co., Ltd. Agent Patent Attorney Takeo Masuda

Claims (1)

[Scope of Claims] 1. A pair of links interposed between the cushion frame 1) located above and the slider located below, and rotatably provided on the support base; A return spring is interposed between the slider and the fixed bracket and applies bias to the slider to move the cushion frame upward; and a return spring is installed between the slider and the fixed bracket.
The cushion frame can be adjusted and held at the desired height by the locking device, which moves the cushion frame upward as the slider is biased by using the lock that adjusts and holds the slider. Features Sea 1-Lifter.