JPS6123475Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle seat height adjustment device.

Conventional electric vehicle seat height adjustment devices have the drawback of being complex and expensive. In addition, manual types are generally difficult to adjust, and you have to hold on to the handle, lift your hips, or bend forward to make adjustments. Therefore, it was difficult to adjust the height to the optimum height while checking the field of view in the seated state, and the problem was that the height had to be adjusted by trial and error.

The present invention was developed under the above circumstances, and its purpose is to allow the height of the seat to be easily adjusted by manual operation while checking the field of view while seated, and to have a simple structure. An object of the present invention is to provide a height adjustment device for an automobile seat that can be manufactured at low cost.

Hereinafter, the present invention will be described with reference to an illustrated embodiment. In FIGS. 1 and 2, 1 is a seat frame, which may be similar to a normal seat frame. The seat frame 1 has a first bracket 2 located on the inside and extending in the front-rear direction on the right side, and second and third brackets 3 spaced apart from each other on the left side.
4 are fixed respectively. 1st bracket 2
A transverse through hole 5 is formed near the front end, and a transverse pin 6 is protruded from the rear end. A pin 7 is protruded from the second bracket 3 and is coaxially opposed to the through hole 5. A pin 8 coaxially opposed to the pin 6 is provided on the third bracket 4 and protrudes parallel to the pin 7. A sliding portion 9 is formed at the tip of the pin 7.

The base 10 includes, for example, a pair of base frames 11 and 12 that are parallel to each other and extend in the front-rear direction.
It is equipped with These base frames 11, 12
may be, for example, the upper rail of a seat slide. The frames 11 and 12 have brackets 1 located near both front and rear ends of each frame.
3, 14 and 15, 16 are fixedly installed, respectively. Each front bracket 13,1 facing each other
5 and each of the rear brackets 14 and 16 are provided with through holes 17 and 18 that are parallel to each other and concentrically opposed to each other.

The link mechanism 20 includes a pair of left and right front links 21, 21 and rear links 22, 22, respectively. These links 21, 21 and 2
2 and 22 have lower end portions fixed to horizontal shafts 23 and 24, respectively. These horizontal axes 23 and 24
Both ends of the brackets are rotatably inserted into the through holes 17 and 18 of the front brackets 13 and 15 and the rear brackets 14 and 16, respectively.
Further, in the upper end portion of each link 21, 21 and 22, 22, horizontal through holes 25, 25 and 26, 26 are provided at equal distances from the horizontal axes 23 and 24, respectively. In common with the through hole 5 of the first bracket 2, a release shaft 34 of a lock mechanism 30, which will be described later, is rotatably inserted through the through hole 25 of the front link 21 located on the right side. The pin 7 of the second bracket 3 is rotatably inserted into the through hole 25 of the front link 21 located on the left side.
The pins 6 and 8 are rotatably inserted into the through holes 26 and 26 of the rear links 22 and 22, respectively. Also,
An inner end portion of a spiral spring member 27 is engaged with the sliding portion 9 of the pin 7 . The outer end of this spring member 27 is locked to the locking part 28 of the left front link 21, and by applying a clockwise rotational force (FIG. 1) to this link 21 around the pin 7, A counterclockwise rotational force is applied around the horizontal axis 23. The front link 21 and the rear link 22 are connected via a connecting rod 29 so as to be rotatable in parallel. If necessary, a plurality of connecting rods 29 may be provided, or they may be omitted.

The locking mechanism 30 includes a locking member 31 fixed to the base 10, and an engaging member 32 provided on the other side of the locking member 31 and detachably engaging with the locking member 31. In the illustrated example, the locking member 31 is attached to the right side base frame 11 of the base 10, has a substantially fan-shaped plate shape, and has a plurality of notches 33 formed in the peripheral edge concentric with the through hole 17. It is equipped with... Further, the engagement member 32 is connected to the release shaft 34.
installed on. That is, the release shaft 34 rotatably passes through a through hole 35 formed in the side wall of the seat frame 1 concentrically with the through hole 5 of the first bracket 2, and has a locking member fixedly attached to the inner end thereof. The mating member 32 includes a lock pin 36 that can be releasably engaged with the cutout portions 33 . A release lever 37 is attached to the release shaft 34 so as to be located near the outer end of the seat frame 1 that extends outward. As shown in FIG. 3, the release lever 37 has an approximately
It is installed at an angle. The lock pin 36 is connected to a pin 38 installed vertically on the link 21.
Due to the tension coil spring 39 stretched between
It is biased in a direction in which it comes into pressure contact with the peripheral edge of the locking member 31 .

The operating lever 40 has a lower end fitted to the outer end of the horizontal shaft 23, and a through hole 41 in the middle part.
is formed, and the outer end of the release shaft 34 is rotatably inserted through the through hole 41.

Next, the operation of the apparatus configured as described above will be explained. In the initial state where the seat frame 1 is set to an arbitrary height, the tension of the tension coil spring 39 causes the lock pin 36 of the engagement member 32 to move into any one of the notches 3 of the engagement member 31.
3, and the release lever 37 is in the locked position. In addition, each link 21, 21 and 22,
22 are all in a forward-inclined state with their upper ends located forward of their lower ends (see FIG. 3). The seat frame 1 is urged upward via the link 21 by the restoring force of the spring member 27.

When a seated person adjusts the seat height, if the user holds the operating lever 40 and the release lever 37 at the same time, the release lever 37 will be rotated in a direction closer to the operating lever 40, and will be engaged via the release shaft 34. The lock pin 36 of the mating member 32 is disengaged from the notch 33 of the locking member 31, and the link mechanism 20 becomes unlocked. In this state, if the operating lever 40 is rotated in the desired direction and the release lever 37 is released when the desired height is approached, the tension coil spring 3
9, the lock pin 36 moves to the nearest notch 3.
Fits with 3. In this case, if the rotational force applied to the horizontal shaft 23 due to the seating load (including the weight of the seated person and the seat, etc.) and the rotational force in the opposite direction due to the spring member 27 are approximately balanced, the force required for adjustment is small. That's fine. Furthermore, when raising the seat height in cases where the seating load is somewhat large, the seated person may step on his or her feet to move his or her hips rearward.

That is, according to the above configuration, the parallelogram link mechanism is provided and the link is tilted forward, so even when the seating load is large, the seat can be raised by pushing it backwards, and the operating lever can be connected to the link. Since they are connected in an interlocking manner, they only need to be operated in the same direction as the seat movement direction, and the seat height can be easily adjusted manually while the seat is in the seated state. Furthermore, since no separate driving power is required, the structure is simple and can be manufactured at low cost. Furthermore, since the spring member 27 is a spiral spring, a large rotational force can be obtained despite the small size.

Note that the present invention is not limited to the above embodiments. For example, the spring member 27 may be a wave spring instead of a spiral spring, thereby making it possible to further reduce the size and weight. Further, the configuration of the brackets 2 to 4, the base 10, etc., the shape and arrangement of the release lever and the operating lever, etc. can be changed as appropriate. Other changes or applications may be made as appropriate within the scope of the gist of the present invention.

As described above, the present invention has a seat frame that includes a base, and forward-inclined links that are spaced apart from each other in the front and back and are supported by the base, each lower end of which is rotatable around a transverse axis, and that is attached to the upper part. a parallelogram-shaped link mechanism that supports the link so that it can rise and fall so that it lowers when moving forward and rises when retreating; an operating lever located on the side of this link mechanism and connected to the horizontal axis of the link; and the link mechanism. The seat frame has a spring member connected to the seat frame to bias the seat frame upward, a locking member fixed to the base, and an engagement member removably engaged with the locking member. a lock mechanism that prevents the seat from moving up and down, and an engaging member of the lock mechanism is fixed to an inner end of a release shaft rotatably provided through the seat frame in the lateral direction, and The outer end of the shaft is rotatably supported by the operating lever, and a release lever is attached near the outer end of the release shaft so as to form a substantially V-shaped angle with respect to the operating lever with the release shaft as the center. It is characterized by

According to the present invention having such a structure, the release lever for operating the engaging member of the lock mechanism is located at a position where it can be held with one hand together with the operating lever for operating the link mechanism, and By simultaneously grasping the levers and rotating the operating levers, it is possible to release the lock and operate the link at the same time, and therefore the height of the seat can be easily adjusted while the user is seated. In addition, the forward-tilting link applies backward pressure to the seat frame, making it easier to lift the seat by pushing it backwards even when the seating load is large. Height can be adjusted. Furthermore, since a power unit or the like is not required, the structure is simple and the cost is low.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
FIG. 2 is a partial sectional view taken along the - line in FIG. 1, and FIG. 3 is an explanatory diagram of the operation. 1... Seat frame, 2, 3, 4... Bracket, 5, 17, 18, 25, 26, 35, 41
...Through hole, 6,7,8...Pin, 10...Base,
20... Link mechanism, 21, 22... Link, 2
3, 24...horizontal shaft, 27...spring member, 30...
Lock mechanism, 31... Locking member, 32... Engaging member, 34... Release shaft, 36... Lock pin, 37
...Release lever, 40...Operation lever.

Claims (1)

[Claims for Utility Model Registration] A seat frame having a base and a forward tilting link which is spaced back and forth and supported by the base, each lower end of which is rotatable around a lateral axis, and which is attached to the upper part of the seat frame. A parallelogram-shaped link mechanism that is supported so as to be able to rise and fall so that it descends when moving forward and rises when retreating; an operating lever located on the side of this link mechanism and connected to the horizontal axis of the link; A spring member that is connected and urges the seat frame upward, a locking member that is fixed to the base, and an engagement member that removably engages with the locking member, and the seat frame is raised and lowered. and a locking mechanism for blocking the release shaft, and the engaging member of the locking mechanism is fixed to an inner end of a release shaft rotatably provided to pass through the seat frame laterally, and The outer end of the release shaft is rotatably supported by the operating lever, and a release lever is attached near the outer end of the release shaft so as to form a substantially V-shaped angle with respect to the operating lever with the release shaft as the center. An automobile seat height adjustment device featuring: