JPS5824593Y2 - Automobile chair backrest inclination angle adjustment device - Google Patents

Description

[Detailed description of the invention] This invention is a so-called fully reclining chair back that can be used as a bed by folding the backrest backward until it becomes almost horizontal, or to expand the cargo loading space. This relates to an inclination angle adjustment device, which simplifies its structure, facilitates inclination angle adjustment operations, and prevents the backrest from collapsing inadvertently when adjusting the inclination angle.
The purpose is to

Embodiments of the present invention will be described below with reference to the drawings.

A chair 1 and a backrest 2 are attached to the vehicle body or a wall by a shaft 3 projecting laterally at the lower end of the chair, and can be raised or lowered using the shaft 3 as a fulcrum.

Near the upper end of the side surface of the backrail 2, there is a rack-engaging adjustment lever 4 that adjusts the inclination angle of the backrail 2 in stages, and a lever that prevents the backrail from falling over the maximum inclination angle when used as a backrail. 5 are overlapped and attached by a common shaft 6.

The levers 4 and 5 can be individually swung up and down, and are engaged with and disengaged from a common protrusion 7 protruding from the vehicle body wall.

The adjustment lever 4 engages with the protrusion 7 when one of the tooth grooves 41 to 43 of the rack falls down, and the fall prevention lever 5 engages with the protrusion 7 when the locking parts 51 and 52 provided at the front and rear of the lever 5 engage with the protrusion 7 when the grooves 41 to 43 of the teeth of the rack fall down. It engages with the protrusion 7 at both ends of the angle adjustment range.

The levers 4 and 5 are always kept pressed against the projection 7 by separate torsion coil springs 8 and 9, respectively.

There is a finger rest or a knob 44 on the operating end of each lever 4, 5.
．． 53 is formed.

Figure 5 shows state a with the backrail inclination angle at its maximum.
A tooth groove 41 furthest from the fulcrum shaft 6 of the angle adjustment lever 4 engages with a protrusion γ on the vehicle body wall.

From this state, raise the angle adjustment lever 4 to disengage it from the protrusion 7, raise the backrest 2 and engage the intermediate tooth groove 42 with the protrusion 7, and the backrest 2 will be fixed at the inclination angle b. Ru.

When the tooth groove 43 closest to the fulcrum shaft 6 is engaged with the protrusion 7, the backrest 2 assumes the most upright angle C as shown by the chain line 2'.

During the above backrest angle adjustment, the collapse prevention lever 5 is not involved at all.

However, if the tilt angle adjustment lever 4 is operated by mistake,
If your hand is carelessly removed from the backrest 2 while adjusting the inclination angle, the backrest 2 will fall backwards due to its own weight, but the locking portion 51 of the fall prevention lever 5 engages with the protrusion 7 as shown in FIG. Therefore, the back 2 can be avoided from collapsing.

Since this position is the most inclined position of the backrest 2, the tooth groove 41 of the inclination angle adjustment lever 4 can be engaged with the protrusion 1.

A locking portion 52 at the rear end of the collapse prevention lever 5 regulates the final position when the backrest 2 is raised by disengaging the inclination angle adjustment lever 4 from the projection 7.

When both levers 4 and 5 are lifted at the same time and released from the projection γ, the backrest 2 becomes completely free and can be tilted backwards.

In the figure, 10 is a board for mounting the levers 4 and 5, 11 is a screw for mounting them, and 12 is a spring cover.

Since the backrest inclination angle adjusting device of the present invention has the above-mentioned configuration, the number of parts is small, the structure is simple, and the operation is easy.

Even if the angle adjustment member 4 is erroneously operated and disengages from the protrusion 7, the backrest 2 is automatically engaged by the collapse prevention member 5.
There is no accidental collapse of the backrest, which is effective in preventing danger when adjusting the backrail inclination angle.

[Brief explanation of drawings]

Figure 1 is a perspective view of the chair equipped with the proposed device, Figure 2 is a side view of the proposed device, Figure 3 is its plan view, and Figure 4 is Figure 2A.
-A vertical cross-sectional view taken along line A, and FIGS. 5 and 6 are side views showing the state of adjusting the inclination angle. 1 is a chair, 2 is a backrest, 3 is a backrest mounting shaft, 4 is an inclination angle adjustment member, 5 is a toppling prevention member, 6 is a mounting shaft, 7 is a protrusion, 8
, 9 is a torsion coil spring.

Claims (1)

[Scope of utility model registration request] In a chair whose backrest can be tilted backwards almost horizontally, there is an adjustment member between the backrest and the car body wall that changes the angle of inclination of the backrest, and an adjustment member that allows the backrest to tilt over the maximum angle of inclination when used as a backrest. A device for adjusting the inclination angle of a backrest of a chair in an automobile, comprising a blocking member, and configured to allow the backrest to be tilted down by simultaneously releasing the engagement of the adjusting member and the blocking member with the vehicle body wall.