JPS6027698Y2 - Backrest forward locking mechanism of reclining device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a backrest forward tilting locking mechanism of a seat reclining device.

Conventional reclining devices have focused on adjusting the inclination angle of the backrest toward the rear, and have not taken into consideration the possibility of tilting the backrest forward and using the back surface as a cargo platform.

Especially in the back seat of a pan or coupe type car,
When driving in this state with the backrest tilted forward in order to expand the luggage space, there was a risk that the backrest would flap due to vibrations caused by the driving and could damage the loaded luggage.

Therefore, conventionally, as shown in FIG. 1, a band 101 is provided on the backrest 100 and the band 101 is locked to the body 102 to prevent the backrest 100 from flapping.

Providing the band 101 in this manner is not only unsightly, but also troublesome to lock the band 101 to the body 102, and the cost is relatively high.

This invention has excellent operability, can be manufactured at low cost, and securely holds the backrest in the forward-leaning position by incorporating a mechanism into the reclining device that locks the backrest in a substantially horizontal state with the backrest tilted forward. It is an object of the present invention to provide a backrest forward tilting locking mechanism for a reclining device.

Hereinafter, preferred embodiments of the present invention will be described with reference to FIG. 2 and the subsequent drawings.

In the first embodiment shown in FIGS. 2 to 5, the backrest 1
The upper end of the arm 2 is fixed to the side surface of the arm 2, and the base end of the arm 2 is fixed to a rotating shaft 4, which is rotated counterclockwise in FIGS. 2 to 4 by means of a return spring 26. A biasing force is constantly applied to prevent rotation.

The base 3 is fixed to the body and is free with respect to the rotation axis 4.

A reclining tooth 5 is formed on the right side of the proximal end of the arm 2 in the drawing, and an operating plate 7 is rotatably attached to the base 3 via a pin 6. and plate 7), a movable plate 8 is fixedly attached to plate 7.

A semicircular notch 9 is formed on the tip end side of the movable plate 8, and the pin 6 is positioned in this notch 9, and adjustment teeth 10 that mesh with the reclining teeth 5 are provided on the left side surface in the drawing.
is formed.

The engagement between the adjusting teeth 10 and the reclining teeth 5 is released by rotating the operating plate 7 and the movable plate 8 via the rollers 12 by operating the operating lever 11.

The operating lever 11 and a member integral therewith are the spring 1
3, it is always urged to rotate counterclockwise in the drawing.

A lock plate 15 having a lock groove 14 is fixed to the base end side of the arm 2.
The right end in the drawing is butted against the tip of the operating plate 7 in FIG. 2a.

The distal end side of the operating plate 7 constitutes an engaging member 16 that engages with the lock plate 15.A retaining convex portion 17 that fits into the lock groove 14 is formed at the upper part of the engaging member 16 in the drawing. ing.

The size of the engagement convex portion 17 is smaller than the lock groove 14, and is designed so that play A is formed during engagement (see FIG. 4).

The reclining teeth 5 and the adjusting teeth 10 are configured to engage only between the upright state of the backrest and the backward tilted state, and not to engage with each other while the backrest is tilted forward from the upright state.

To explain the operation of the first embodiment in which the lock plate 15 is provided on the arm 2 side and the engagement member 16 is provided on the distal end side of the operating plate 7 on the movable plate 8 side, as shown in FIG. As shown in -b, the reclining teeth 5 and the adjusting teeth 10 mesh with each other, stopping the rotation of the rotating plate 4 and the arm 2 fixed thereto by the return spring 26, and fixing the backrest 1.

Next, when the operating lever 11 is pulled up, the movable plate 8 is moved through the operating plate 7 by the action of the roller 12.
rotates, and the engagement between the reclining teeth 5 and the adjustment 10 is released.

When the engagement is released in this way, the arm 2 is rotated counterclockwise in the drawing by the return spring 26, and the lock plate 15 fixed to the arm 2 is an engaging member formed as a part of the operating plate 7. 16 engaging convex portions 17 (see FIG. 3a).

This condition is clear from Figure 3. In this state, the backrest 1 is in contact with the seat portion 20.

Next, when the backrest 1 in the free state is pressed against the seat portion 20, the lock plate 15 further slides on the engaging convex portion 17, and the engaging convex portion 17 engages with the lock groove 14 of the lock plate 15. (See Figure 4a).

At this point, the backrest 1 becomes unrotatable, and the seat 20
The back surface is held fixed in a substantially parallel state (see Fig. 4).

And when you want to raise the backrest 1, use the operating lever 11.
It is sufficient to pull up again and operate the operating plate 7 to remove the engaging convex portion 17 from the lock groove 14.

In the first embodiment, the reclining device (including the operating plate 7) itself is well known and is only an example to which the present invention is applied.

Next, a second embodiment in which the present invention is applied to a known reclining device in which the operating plate 7 is not used will be described with reference to FIG. 6.

This reclining device includes an arm 2 rotatable around a shaft 21, reclining teeth 5 formed on the lower arcuate surface of the arm 2, and a movable plate 8 having adjustment teeth 10 meshing with the teeth 5. is provided so as to rotate about a shaft 22 as a fulcrum.

The movable plate 8 is moved by operating the operating lever 11 to release the mesh between the adjusting teeth 10 and the reclining teeth.

That is, when the operating lever 11 is rotated against the spring 25 using the pulling shaft 23 as a fulcrum, this lever 11
The roller 12 loosely fitted on the shaft 24 provided at the lower end of the roller 12 is disengaged from the movable plate 8, and the movable plate 8 is rotated counterclockwise in the drawing by a spring or the like to release the engaged state. .

In the reclining device configured in this way,
The lower end of the engagement member 16 is fixed to the movable plate 8, and the lock plate 15 having lock grooves 14 at appropriate locations on the arm 2 is fixed, and the arm 2 is rotated forward (that is, the backrest 1 is tilted forward). When the backrest 1 is pressed against the seat portion 20, the distal end side of the retaining member 16, that is, the engagement convex portion 17 is engaged with the lock groove 14.

As explained above, according to the present invention, the engaging member having the engaging convex portion is fixed to the movable plate of the reclining device,
The lock plate is fixed to the arm so that the lock groove is located at the position where it engages with the retaining convex part when the arm is tilted forward and the backrest is pressed against the seat, so just by operating the reclining device, the backrest can be adjusted. The forward tilted state of the seat can be fixed and maintained, and the backrest will not flap due to vibration even when traveling with luggage placed on the back of the seat.

In particular, in the present invention, when compared with the conventional example in which the backrest is fixed when it is tilted forward using a band or the like separate from the reclining device, operability can be improved and centralized.

In addition, in terms of cost, the present invention only incorporates the engaging member and the lock plate into the reclining device, and this is a simple member for simply engaging the concave and convex portions.
This is extremely advantageous compared to conventional devices that use parts such as bands, hooks, and screws.

Furthermore, it looks good even though it is built into a reclining device.

In addition, the reclining teeth formed on the arm are formed over a wide area around the lower end side of the arm, and the teeth are configured so that they mesh with the adjustment teeth of the movable plate even when the backrest is tilted forward. One possibility is to try to lock the time, but when the teeth engage each other, the load is placed on the backrest (naturally, the load is often greater than when the human body is leaning back).
It is weak against vibrations and vibrations, and there is a risk of damaging the teeth or even breaking the reclining device.

In contrast, the present invention employs a concave-convex engagement as described above, and since there is play, the strength of the engaged portion is sufficient.

In addition, even if play is formed in the lock groove, the presence of the return spring and the weight of the loaded baggage will prevent the backrest from flapping, and this play will act as a buffer against strong vibrations, causing damage to the engagement part. It also prevents.

Furthermore, the teeth do not engage over a wide range, and the reclining teeth are far from the position facing the adjustment teeth when the backrest is tilted forward, resulting in teeth breakage when items are loaded on the back of the backrest. There is no such thing.

Furthermore, a reclining device using an operating plate in which a portion of the operating plate is formed as an engaging member is more advantageous in terms of cost.

[Brief explanation of the drawing]

Fig. 1 is a side view of the conventional example, Fig. 2a is a simplified side view of a reclining device showing the first embodiment of the present invention, Fig. 2 is a side view of the entire seat shown in the previous figure, and Fig. 3a is a side view of the reclining device according to the first embodiment of the present invention. A side view similar to Figure 2a when the backrest is tilted forward, Figure 3 is a side view of the entire seat shown in the previous figure, and Figure 4a is Figure 2 when the backrest is tilted forward and locked. Fig. 4 is a side view of the entire seat shown in the previous figure, Fig. 5 is a schematic cross-sectional view taken along the line ■-V in Fig. 3a, and Fig. 6 shows only the main parts of the second embodiment. FIG. 1...Backrest, 2...Arm, 3.
... Base, 5 ... Reclining teeth, 7 ... Operating plate, 8 ...
...Movable plate, 10...Adjustment teeth, 11...
...Operation lever 14...Lock groove, 15...
... Tatsuku plate, 16... Engagement member, 1
7... Engagement convex portion, A... Play.

Claims (1)

[Claims for Utility Model Registration] 1. An arm 2 fixed to the backrest 1 is rotatably attached to the base 3 on the fixed side, reclining teeth 5 are formed on the arm 2, and the arm 2 is rotatably attached to the base 3. Adjustment teeth 1 that mesh with the reclining teeth 5 are attached to the attached movable plate 7.
0 is formed, and is provided with an operating lever 11 for moving the movable plate 7 to release the engagement between the reclining teeth 5 and the adjusting teeth 10, and a return spring that always biases the arm 2 in a direction to tilt it forward. 26, the reclining teeth 5 and the adjusting teeth 10 engage with each other between the upright state of the backrest and the backward tilted state, and do not engage with each other while the backrest 1 is tilted forward from the upright state. In this device, an engaging member 16 having an engaging convex portion 17 is formed on or attached to a movable plate 7, and is engaged with the retaining convex portion 17 while the arm 2 is tilted forward and pressed against the backrest seat. The lock plate 15 is fixed to the arm 2 so that the lock groove 14 is located at the position where the movable plate 7 moves in the direction away from the arm 2 when the operating lever 11 is operated, and moves away from the arm 2 when the operating lever 11 is not operated. It is controlled to move in the direction of coming into close contact with the reclining tooth 5 or the lock groove 14, and when the engagement protrusion 17 is engaged with the lock groove 14 of the lock plate 15, a play A is formed in the lock groove 14. A forward tilting locking mechanism for the backrest of a reclining device configured in 2. A reclining device in which the movable plate receives the operation of the operating lever via an operating plate, in which a part of the operating plate is formed as a retaining member having a retaining convex portion. A forward tilting locking mechanism for a reclining device according to claim 1.