JPH04128925U - Vehicle seat lifting device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a vehicle seat elevating device that has a seat vertical fine adjustment function, a cushioning function, and an elevating adjustment function. [Configuration] Lower frame 10 fixed to the floor of the vehicle
and an upper frame 20 to which the seat member is attached.
and an elevating link mechanism 30 that supports the upper frame 20 in a horizontal state with respect to the lower frame 10 so as to be movable up and down.
A slide bar 44 is movably attached to one of the upper frame 20 and the lower frame 10, and a drive motor 54 moves the slide bar 44 in a finely movable manner via a feed screw 50. is assembled, and between the slide bar 44 and the elevating link mechanism 30, the movement of the slide bar 44 is controlled by the elevating link mechanism 30.
A support spring 62 is installed which has elasticity and is elastic in order to cause the elevating link mechanism 30 to move up and down.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to an elevating device for a vehicle seat.

0002

[Conventional technology]

Conventionally, as shown in Figure 5, vehicles with a high vehicle height and a high floor surface F have a , some are provided with a step part ST that is one step lower than the floor surface F. In addition, some seats are equipped with a fine adjustment device to finely adjust the height of the seat S. , some seats S have a built-in shock absorber.

0003

[Problem that the idea aims to solve]

By the way, in the above-mentioned vehicle with a high vehicle height and a step portion ST, the seat Since the seat surface of S is set at an appropriate height from the floor F, There are inconveniences such as the fact that the feet may not reach the step ST when getting off the vehicle. child This is especially a problem when elderly people ride in the vehicle or in delivery vehicles where people frequently get on and off the vehicle. . In addition, the conventional fine adjustment device for the seat surface of Seat S has a small vertical adjustment range. Therefore, if you want to raise or lower the seat surface of the seat S, use the fine adjustment device. In addition to the shock absorber, the lifting adjustment device must be assembled separately, and these devices Problems arise in that the installation space becomes larger and the weight increases. In view of the above-mentioned drawbacks of the conventional technology, the purpose of this invention is to provide seat vertical fine adjustment functions and cushioning functions. It is an object of the present invention to provide a vehicle seat elevating device having a lifting and lowering adjustment function.

0004

[Means to solve the problem]

In order to achieve the above objective, the present invention has a lower frame fixed to the floor of the vehicle. , an upper frame to which the seat member is attached, and a front frame with respect to the lower frame. Equipped with an elevating link mechanism that supports the upper frame in a horizontal state so that it can be raised and lowered. Eh, one of the upper frame and the lower frame has an operating The member is movably assembled, and the actuating member is slightly movable via a feed screw. A drive mechanism for moving the actuating member and the elevating link mechanism is assembled. In between, the movement of the actuating member is transmitted to the elevating link mechanism, and the elevating link mechanism A support spring is attached that allows the lift to move up and down and has elasticity that allows it to expand and contract.

[0005]

[Effect]

In the present invention configured as described above, the drive mechanism allows the By moving the actuating member, the movement of the actuating member is controlled by the lifting link by the support spring. The transmission is transmitted to the upper frame, and the lifting link mechanism moves up and down The elevation adjustment is made. In addition, the drive mechanism allows fine movement of the actuating member via the feed screw. By doing so, the upper frame can be finely adjusted up and down. In addition, the vibration input to the lower frame from the floor surface is caused by the expansion and contraction of the support spring. It is absorbed by.

[0006]

【Example】

Next, one embodiment of the present invention will be described based on the drawings. In Figure 1, which is a perspective view of this vehicle seat elevating device, The lower frame 10 is constructed by connecting two vertical members 12 and two horizontal members 14 into a rectangular frame shape. formed by combining. Each longitudinal member 12 has a guide groove 16 that opens inward. It is formed in a U-shaped cross section.

[0007] An upper frame 2 is provided above the lower frame 10 by an elevating link mechanism 30. 0 is assembled so that it can be moved up and down. The upper frame 20 is almost the same as the lower frame 10. Similarly, two vertical members 22 and two horizontal members 24 are connected to form a rectangular frame. A guide groove 26 is provided in each longitudinal member 22 . Also, on the upper frame 20 , seat members such as a seat cushion and a seat back (not shown) are attached. .

[0008] An elevating link that supports the upper frame 20 in a movable manner relative to the lower frame 10 The mechanism 30 has a pair of first link rods 32 and a second link rod 34 of equal length, The center portions of both the first and second link rods 32 and 34 are formed into an X-shape by bolts 36, respectively. It is pivoted.

[0009] The lower end of each first link rod 32 is pinned to one end of each vertical member 12 of the lower frame 10. They are rotatably connected by 33. Between the upper ends of both first link rods 32 , an upper connecting rod 38 has both ends protruding from the outer surface of each first link rod 32. It has been erected in a state. Rollers 39 rotate at both ends of the upper connecting rod 38. Each roller 39 is provided in the guide groove 2 of each longitudinal member 22 of the upper frame 20. 6 so that it can rotate and move.

0010 The upper end of each second link rod 34 is pinned to one end of each vertical member 22 of the upper frame 20. They are rotatably connected by a pin 35. Between the lower ends of both second link rods 34 , the lower connecting rod 40 has both ends protruding from the outer surface of each second link rod 34. It has been erected in a state. The lower connecting rod 40 is rotatably provided at both ends thereof. Each of the rollers 42 can be rotatably moved into the guide groove 16 of each vertical member 12 of the lower frame 10. It is incorporated into Noh.

[0011] The upper frame 20 is provided with a slide bar 44 as an operating member. Ru. Rollers 46 are rotatably provided at both ends of the slide bar 44, and each roller 4 6 is rotatably fitted into the guide groove 26. to slide bar 44 is formed with two screw holes 48, into which a feed screw 50 is screwed. has been done.

0012 At the rear of the upper frame 20 is a drive motor 54 that is capable of forward and reverse rotation and is equipped with a speed reduction mechanism. (drive mechanism) is provided, and the output shaft (not shown) of the drive motor 54 and both feed shafts are provided. The same 50 is linked by a belt or chain (not shown), and the drive motor The slide bar 44 is moved forward by the forward and reverse rotation of both feed screws 50 by the operation of the motor 54. It is designed to be moved backwards. Further, the drive motor 54 is connected to an engine (not shown). Fine adjustment switches installed on the ignition key switch and instrument panel, etc. It is activated by turning the switch on and off.

[0013] A tension coil spring is connected between the slide bar 44 and the upper connecting rod 38. Two support springs 62 are tensioned, and an oil-type, gas-type, etc. A absorber 60 is assembled. In addition, one side member 24 of the upper frame 20 and the slide bar 44, there is a slide corresponding to the rise of the upper frame 20. Two tension coil springs 56 are provided to assist the movement of the bar 44 in one direction. It is stretched.

[0014] A stopper rod 70 is fixed to the upper connecting rod 38, and as shown in FIG. The tip of the topper rod 70 is inserted into an insertion hole 71 provided in the slide bar 44. It is. The insertion hole 71 of the slide bar 44 is placed on the axis of the stopper rod 70. Thus, the stopper rubber 72 is fixed.

[0015] The slide bar 44 has a lock pin 82 provided on the stopper rod 70. A lock arm 74 has a plurality of engagement recesses 76 that are removably engaged with each other. Assembled at one end so that it can be rotated in the locking and unlocking directions using a pin 73 It is being The lock arm 74 operates a solenoid 78 via a tension spring 77. It is connected to a shaft 80. The solenoid 78 is normally in a de-energized state and the actuating shaft 8 0 is in the position shown in FIG. 2, and the lock arm 74 is detached from the lock pin 82. is in the unlocked state. Note that the stopper portion 75 at one end of the lock arm 74 When the lock arm 74 comes into contact with the slide bar 44, further unlocking of the lock arm 74 is prevented. Rotation in the horizontal direction is restricted.

[0016] In this embodiment configured as described above, when getting into the vehicle, there are no lifting/lowering controls. The link mechanism 30 moves the upper frame 20 to the lowering end entry/exit position D shown in FIG. It is in. Therefore, the user can easily sit on the seat from the step portion of the vehicle.

[0017] After getting in the car, turn on the ignition key switch to turn on the power (not shown). The drive motor 54 rotates in the forward direction for a predetermined period of time via the air circuit. Then, feed screw 5 0 is rotated in the forward direction, and the slide bar 44 moves in one direction by a predetermined stroke. be moved. As the slide bar 44 moves in one direction, its moving force is applied to the support spring 6. 2 to the upper connecting rod 38, the elevating link mechanism 30 is It is moved up to the position. This makes the upper frame 20 almost suitable for driving. It is raised to the raised position N and stopped.

[0018] When the upper frame 20 is stopped at the raised position N, Turn on/off the aforementioned fine adjustment switch (not shown) provided on the maintenance panel, etc. By doing so, the slide bar 44 is slightly moved via the drive motor 54 and the feed screw 50. The lift link mechanism 30 moves up and down slightly to raise and lower the height of the upper frame 20. The height is finely adjusted between the lowest operating position L and the highest operating position U based on the raised position N. It will be done.

[0019] When the ignition key switch is turned off after driving, the drive motor 54 is turned off. Rotate in the opposite direction for a predetermined period of time. As a result, the elevating link mechanism 30 is moved downward, The upper frame 20 is lowered to the above-mentioned boarding and alighting position D. For this reason, the vehicle step You can easily get off the train.

[0020] In this way, the vertical movement of the upper frame 20 is based on the elevating link mechanism 30. Therefore, the vertical movement range is wide, and the vertical movement from the boarding position D to the ascending position N is is possible. At the same time, the vertical movement of the upper frame 20 is caused by the rotation of the feed screw 50. Since it is adjusted by rotation, it is easy to make fine adjustments up and down based on the raised position N. be exposed.

[0021] Further, as shown in FIGS. 1 and 2, the lock arm 74 is in the unlocked state. At times, vibrations input to the lower frame 10 from the floor may cause the support springs 62 to expand. Because the shock is absorbed by the shock absorber 60, the vertical direction of the seat is Provides a buffering function.

[0022] In addition, if you do not want the seat to have a cushioning function in the vertical direction, from the state shown in Figure 2, When the activation switch is operated, the solenoid 78 is energized, and as shown in FIG. The operating shaft 80 is extended, and the lock arm 74 is rotated in the locking direction by the tension spring 77. be done. As a result, one of the engagement recesses 76 of the lock arms 74 is locked. engages with the lock pin 82 and enters the locked state. In this locked state, the upper connection Since the rod 38 is restrained so that it cannot move, the seat is not supported by the support spring 62 or the like. The buffering function is lost.

[0023] In this example, the slide bar and drive motor are not provided on the upper frame. However, it may also be provided on the lower frame. In addition, the locking mechanism may be attached to other members such as the upper link bar, the lower link bar, and the first link rod. It may be provided, or it does not necessarily have to be provided. In addition, the present invention can be implemented with various modifications based on the knowledge of those skilled in the art. Of course.

[0024]

[Effect of the idea]

As described above, according to the present invention, the elevating link mechanism is lowered to raise the upper part. By lowering the frame to the specified position, it can be used on vehicles with high floor surfaces and steps. Even if there is a problem, you can easily sit on the seat, and You can easily get off the vehicle from this position. In addition, it not only has the function of raising and lowering the sheet mentioned above, but also has a drive mechanism that allows it to be fed easily. By slightly moving the actuating member through the screw, fine vertical adjustment is achieved. The seat is moved by the expansion and contraction of the support spring assembled between the moving member and the elevating link mechanism. Provides vertical buffering function. For this reason, for the seat, a lifting device, fine vertical adjustment is required. Unlike the case where the adjustment device and shock absorber are assembled separately, the installation space is small. It can be made smaller and the increase in weight can be kept small.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a plan view showing a mechanism for locking the buffer function of the upper frame, and is a diagram showing an unlocked state.

FIG. 3 is a diagram similarly showing the locked state.

FIG. 4 is an explanatory diagram of the operation of the device in FIG. 1;

FIG. 5 is a perspective view of a conventional high vehicle.

[Explanation of symbols]

10 Lower frame 20 Upper frame 30 Lifting link mechanism 44 Slide bar (operating member) 50 Feed screw 54 Drive motor 62 Support spring

Claims (1)

[Scope of utility model registration request] 1. A lower frame fixed to a floor surface of a vehicle, an upper frame to which a seat member is attached, and an elevating link mechanism that maintains the upper frame in a horizontal state with respect to the lower frame and supports it so that it can rise and fall. Equipped with
An actuating member is movably attached to one of the upper frame and the lower frame, and a drive mechanism for finely moving the actuating member via a feed screw is attached to the actuating member. A support spring is installed between the member and the elevating link mechanism, and the support spring transmits the movement of the actuating member to the elevating link mechanism to move the elevating link mechanism up and down, and has an expandable and contractible spring property. A vehicle seat elevating device characterized by: