JPS63504Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a seat height adjustment device for vehicles, etc., which allows a comfortable sitting posture without fatigue by adjusting the seat height according to the physique of the occupant. The invention relates to a device that allows the user to maintain a safe field of vision.

Conventionally, various mechanisms have been proposed for vertical adjustment devices for vehicle seats, but all of them have a complicated structure and a large number of parts, so they have the drawback of requiring many manufacturing steps and increasing costs.

In order to overcome these conventional drawbacks, the present invention provides a vehicle seat height adjustment device that has a simple structure, a small number of parts, a light operating load, and improved strength.

This invention will be explained in detail below with reference to embodiments shown in the accompanying drawings.

The seat D is composed of a seat cushion A and a seat back B, and a well-known reclining knuckle C is fixedly installed between the seat cushion A and the seat back B, which can adjust the inclination angle of the seat back. Reference numeral 1 indicates a well-known slide mechanism for adjusting the longitudinal position of the seat by means of a locking device (not shown), which is fixed to the vehicle body via a fixed rail 1a. The seat cushion A is pivotally attached to the rear bracket 2 of the slide mechanism at a shaft 2a so as to be rotatable. In order to raise the seat located at the position shown by the solid line in FIG. It is something that can be elevated into position. 5
1 shows a lock bracket having a plurality of locking grooves 5a, and the lock bracket 5 is fixed to the shaft 6. Furthermore, the shaft 6 is screwed into the cushion frame A', which is the skeleton of the seat cushion A.
It is rotatably provided on a pair of fixing brackets 7, 7' fixed at 4. One of the fixed brackets 7 has a cross-sectional shape formed by flanges 7a and 7b on both sides, and has elongated holes 7a' and holes 7b' in both flanges, respectively. The lock pin 4
is inserted through the elongated hole 7a' and hole 7b', and one end is attached to the fixing bracket 7 with an elastic member such as a rubber member 8 and a snap pin 9. Reference numeral 3 designates a lever bracket rotatably provided on the shaft 6, and the lever bracket 3 is connected by inserting the lock pin into the elongated hole 3a. Furthermore, the elongated hole 3a is formed so that the distance from the shaft 6 is displaced. That is, by operating the lever bracket 3, one end of the lock pin 4 is swung within the long hole 3a, thereby swinging the inside of the long hole 7a' of the fixed bracket 7, and further locking the lock pin 4 into the locking groove 5a of the lock bracket 5. This is to release the engagement. Further, the hole 7b' of the fixing bracket 7 is formed so that one end of the lock pin 4 can swing within the elongated hole 7a'. Reference numeral 10 indicates a link A, one end of which is fixed to the shaft 6, and the other end is pivotally connected to a link B11. Furthermore, the link B11
is pivotally connected to the front bracket 12 of the slide mechanism. Reference numeral 13 indicates a spring tensioned between the lever bracket 3 and the fixed bracket 7, which urges the lever bracket 3 to always return to a predetermined position, and which, together with the rubber member 8, keeps the lock pin 4 engaged with the bracket 5. It is biased to engage with the stop groove 5a.

Next, the operation of the apparatus of the present invention constructed as above will be explained.

FIG. 3 shows the lowermost position of the seat, where the lock pin 4 is engaged with the locking groove at the uppermost end of the lock bracket 5 due to the bias of the spring 13. Further, one end of the lock pin 4 is located at the lowermost end of the elongated hole 3a of the lever bracket 3 and at the leftmost end of the elongated hole 7a' of the fixing bracket 7. To raise the seat height, first press the lever bracket 3.
When the lock pin 4 is lifted up against the bias of the spring 13, that is, rotated clockwise about the shaft 6, one end of the lock pin 4 swings upward to the slot 3a and to the right of the slot 7a'. The lock bracket 5 is moved away from the locking groove 5a of the lock bracket 5. When this state is maintained and the seat is lifted, the lock bracket 5 rotates counterclockwise together with the shaft 6, and the locking groove facing the lock pin 4 changes to the neutral position. (See Figure 5) Next, when the external force applied to the lever bracket 3 is removed, the spring 1
3 and the rubber member 8, one end of the lock pin 4 swings to the left of the elongated hole 7a' and below the elongated hole 3a, and engages with the locking groove 5a of the lock bracket 5.
Therefore, the seat height can be maintained at this position. Similarly, the seat height can be adjusted to the uppermost position as shown in FIG. 4, and can be freely set at any height position.

As explained above, in this device, when the lever bracket 3 is operated, one end of the lock pin 4 swings in the elongated holes 3a and 7a', thereby disengaging the engagement with the locking groove of the lock bracket 5, and locking the seat. When the lever bracket is released, the lock pin 4 is engaged with the locking groove 5a by the spring 13 and through both the elongated holes. Since it is inserted directly into the lever bracket 3 without going through other parts, the structure is simple and the number of parts is small, making it possible to manufacture it at low cost.By attaching one end of the lock pin 4 with a rubber material 8, the lever bracket 3 Since only the other end swings when operated, the operating load is light and stable locking can be achieved.
Moreover, the lock pin 4 is located in the elongated hole 7 of the fixing bracket 7.
a' and hole 7b' and the elongated hole 3a of the lever bracket 3, and is engaged with the locking groove 5a of the lock bracket 5, that is, the lock pin 4 is inserted in four places.
By holding the seat, even if a load is applied to the seat, the strength can be improved by sharing the load.
Furthermore, by providing the fixing bracket 7 with a mechanism, it is possible to easily attach it to the seat cushion.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a side view showing the entire seat to which the device of the invention is attached; Fig. 2 is a perspective view of a cushion frame to which the device of the invention is attached; Figures 3, 4, and 5 are explanatory diagrams of the operating state of the device of the present invention, and Figure 6 is the diagram of Figure 5.
FIG. 7 is a sectional view taken along the - line in FIG. 3. A... Seat cushion, B... Seat back, 3... Lever bracket, 4... Lock pin, 5... Lock bracket, 6... Shaft,
7...Fixed bracket.

Claims (1)

[Scope of utility model registration request] A pair of fixed brackets are fixed to both sides of a cushion frame of a vehicle seat, and a shaft is rotatably provided on the fixed brackets, and at least one of the fixed brackets has a cross-sectional shape formed by flanges on both sides, and An elongated hole is formed in the flange and a hole is formed in the other flange, a lock bracket having a plurality of locking grooves is fixed to the shaft, and a lever bracket in which the elongated hole is formed is rotatably provided. One end of the lock pin, which is inserted through the elongated hole and the elongated hole of the lever bracket and swings within both elongated holes and is capable of engaging and disengaging from the locking groove of the lock bracket, is connected to the fixing bracket via an elastic member. A height adjusting device for a vehicle seat, wherein the other end of the lock pin engages and disengages from a locking groove of the lock bracket by operating the lever bracket.