JPH0337463Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reclining device used for a front seat of a passenger car, and in particular, the reclining device is designed to automatically store the operating part of the release member in the side of the seat back when the seat back is folded back. The present invention relates to a reclining device.

Generally, a reclining device has an upper arm fixed to the side of the seat bag, which is pivoted to a lower bracket fixed to the rear of the cushion seat.
A ratchet is formed at the lower part of the upper arm, and a locking member that can be engaged with and detached from the ratchet is provided on the lower bracket, and this locking member is made to engage and disengage from the ratchet by rotating the release member. . The operating section of the release member is normally located on the side of the seat bag or the cushion seat, but if it is located on the side of the seat bag, it will be difficult to operate when the cushion seat is folded forward or backward. At times, this operating section protrudes from the seat, and there is a risk that your feet or clothes may get caught on it when getting on or off the vehicle. FIG. 4 shows how the operating portion 1 of the release member protrudes from the seat as a result of tilting the seat back 2 backward. If the operating portion protrudes from the seat in this manner, there is a possibility that the operating portion may bend when an unexpected external force is applied, causing an accident in which the reclining operation cannot be performed.

In view of these problems, JP-A-58-105711 discloses a device in which the operating section of the release member is housed on the side of the cushion seat both when the cushion seat is folded forward and backward. However, this device is too complex and expensive.

The present invention is based on the recognition that when the operating part of the release member is located on the side of the seat back, the operating part protrudes and becomes a nuisance or danger only when the seat back is tilted backwards. The object of this invention is to provide a reclining device in which the operating section of the release member can be stored in the side of the seat back only when the seat is reclined backwards.

In order to achieve this object, the present invention provides a reclining device of a type in which the operating part of the release member is located on the side of the seat back and is unlocked by rotating the release member forward. The member is composed of a release lever having an operation part on the side of the atsupah arm, and a release arm coaxial with the release lever and capable of relative rotation in the front and back direction by a certain amount with respect to the release lever. A spring means is normally provided at the rotation end on the front side with respect to the release arm, and an interlocking plate having an interlocking part for the upper arm and rotating together with the upper arm when the upper arm is tilted backward is provided. Furthermore, the present invention is characterized in that a release lever interlocking portion is provided which causes the release lever to fall back against a spring means when the interlocking plate is rotated rearward.

The invention will now be described with reference to the illustrated embodiments. The upper arm 11 is fixed to the lower side surface of the seat bag 2, and the lower bracket 13 is fixed to the rear side surface of the cushion seat 14.
It is pivotably mounted at 5. Atsupah arm 1
A ratchet 16 is formed at the bottom of 1.
On the other hand, this ratchet 16 is attached to the lower bracket 13.
A pawl 18 having locking teeth 17 for engaging and disengaging is pivotally mounted by a pin 19. An interlocking pin 20 is fixed to the pole 18.

A release arm 21 and a release lever 22 are coaxially pivotally attached to the shaft 15 along with the upper arm 11, and an interlocking plate 2 is also attached to the shaft 15.
3 is fitted with a long hole 23a that is long in the vertical direction.
A cam hole 24 into which the interlocking pin 20 is inserted is formed in the release arm 21, and a roller 25 that comes into contact with the back surface of the pawl 18 is supported. 2
Reference numeral 6 denotes a tension spring that urges the release arm 21 to rotate clockwise in FIG. The cam hole 24 rotates the pawl 18 counterclockwise in the figure via the interlocking pin 20 when the release arm 21 is rotated in the counterclockwise direction (unlocking direction) in the same figure, and the lock tooth 17
This is to disengage the ratchet 16. Conversely, the roller 25 has the effect of pushing the lock tooth 17 toward the ratchet 16 and meshing with it by the force of the tension spring 26.

The release arm 21 further has a shaft 1 at its upper part.
An arcuate groove 30 centered at 5 is bored, and an interlocking pin 31 fixed to the release lever 22 is fitted into this arcuate groove 30. It is designed to be able to rotate relative to the front and back. The toggle spring 32 normally rotates the release lever 22 forward (counterclockwise in FIG. 1) and brings the interlocking pin 31 into contact with the front end of the arcuate groove 30 (FIG. 1). Therefore, when the release arm 21 is rotated forward, that is, in the unlocking direction in this state, the release lever 22 rotates together with the release arm 21. The upper part of the release lever 22 extends to the side of the upper arm 11, and its upper end constitutes the operating part 1.

The interlocking plate 23 is movable in the vertical direction due to the fitting relationship between the shaft 15 and the elongated hole 23a, but normally the release lever 22 and the interlocking plate 2
It is pulled upward by a tension spring 33 that is tensioned between 3 and 3. In other words, the shaft 15 is located at the lower end of the elongated hole 23a. This interlocking plate 23
has interlocking protrusions 34 and 35 that protrude in the radial direction on both sides of its upper part. The interlocking protrusion 35 on the rear side (right side in FIG. 1) constitutes an interlocking part for the upper arm, and an interlocking pin 36 protruding from the upper arm 11 is located inside this interlocking protrusion 35. Further, the front interlocking protrusion 34 constitutes a release lever interlocking section.

On the other hand, the interlocking pin 31 also extends to the interlocking plate 23 side, and the interlocking protrusion 34 on the front side (left side of the same)
can be engaged from the inside. When the engagement surface 34a of the interlocking protrusion 34 with the interlocking pin 31 is pressed by the interlocking pin 31, the interlocking plate 23
It has a tapered surface or a smooth curved surface that descends along the elongated hole 23a. In addition, interlocking plate 2
A rotation range regulating protrusion 38 is provided below the lower bracket 3, and the rotation range regulating protrusion 38 fits into an arcuate elongated hole 39 formed in the lower bracket 13 to regulate the rotation range. Also, this interlocking plate 23
is rotated forward (counterclockwise in FIG. 1) by a tension spring 40 stretched between the upper arm 11 and the upper arm 11. The play stroke L between the interlocking pin 31 and the interlocking protrusion 34 causes the interlocking plate 2 to rotate when the release lever 22 is rotated in the unlocking direction.
3 is set to prevent it from rotating.

Therefore, the present device having the above configuration operates as follows. First, when the upper arm 11 (seat back 2) is in the standing position (neutral position, seated state) shown in FIG. Interlocking pin 31 and arcuate groove 30
Due to the engagement relationship, the release arm 21 integrally rotates in the same direction. Then, the cam hole 24 and the interlocking pin 2
Due to the relationship of 0, the lock teeth 17 and the ratchet 16 are disengaged, and the upper arm 11 can be tilted forward or backward. During this unlocking operation, the interlocking pin 31 moves through the idle stroke L and does not come into contact with the interlocking protrusion 34, so the interlocking plate 23 does not rotate.

In this state, when the Atsupa arm 11 is tilted forward, the interlocking pin 36 of the Atsupa arm 11 is moved from the interlocking plate 2.
3 in the direction away from the interlocking protrusion 35. This movement causes the interlocking plate 23 to release the tension spring 40.
However, the rotation range is restricted by the rotation range regulating protrusion 38 and the arcuate elongated hole 39, and the release lever 22 does not rotate.

On the other hand, when Atsupa Arm 11 is pushed back,
Since the interlocking pin 36 comes into contact with the interlocking protrusion (upper arm interlocking part) 35, the interlocking plate 23 rotates backward, that is, clockwise in FIG. 1. When the interlocking plate 23 rotates, the interlocking protrusion (release lever interlocking part) 34 comes into contact with the interlocking pin 31, and the release lever 22 rotates backward (clockwise) via the interlocking pin 31. That is, the release lever 22 automatically falls backward in response to the rearward movement of the upper arm 11, and is retracted to the side of the upper arm 11 (seat back 2) (dashed line in FIGS. 2 and 4). And like this release lever 2
2 falls backward, the toggle spring 32 reverses the direction in which the release lever 22 is biased due to its properties. As a result, the release lever 22 is stably held in the retracted position.

In either case of tilting forward or backward, when the release lever 22 is released at the tilted position, the lock tooth 17 of the ball 18 engages with the ratchet 16 of the upper arm 11 by the force of the tension spring 26 via the roller 25, and the position is adjusted. is locked. To return the upper arm 11 to the neutral position, when the upper arm 11 is folded forward, the release lever 22 is rotated forward, and the lock is released in the same manner as described above.
Further, when tilting backward, the release lever 22 is rotated idly relative to the release arm 21 within the range of the arcuate groove 30, and the interlocking pin 31 is brought into contact with all ends of the arcuate groove 30. At this time, the interlocking pin 31 presses the engagement surface 34a of the interlocking protrusion 34 and pushes down the interlocking plate 23, so the rotation of the release arm 21 is not hindered, and then the release lever 22
Rotate it forward to release the lock. As the upper arm 11 returns to the neutral position, the interlocking plate 23 also rotates in the same direction by the force of the tension spring 40, returning to the position shown in FIG.

In the above embodiment, separate springs are used to bias the interlocking plate 23 to rotate and to move it upward, but it is possible to bias the interlocking plate 23 in both directions using the same spring. be. Also interlocking plate 2
3, the same effect can be obtained by pivoting the interlocking protrusion 35 side to the upper arm 11 and urging the interlocking protrusion 34 side to rotate upward.

As mentioned above, the reclining device of the present invention is
The release member is divided into two parts, a release lever and a release arm, each having an operation part on the side of the arm, allowing both to rotate relative to each other by a certain amount, and the release lever is normally biased to the rotation end on the front side with respect to the release arm. This is a simple mechanism that includes a spring means and an interlocking plate that rotates the release lever relative to the release arm and tilts it back in conjunction with the rearward movement of the upper arm. Can be stored on the side. Therefore, it is possible to prevent accidents caused by the operating portion protruding when the seatback is folded backwards.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the reclining device of the present invention, Fig. 2 is a side view in a different operating state from Fig. 1, excluding parts unrelated to the gist of the invention, and Fig. 3. The figure is an exploded perspective view, and FIG. 4 is a side view showing the protruding state and retracted state of the release member. 1...Operation unit, 11...Atsupa arm, 13...
...Lower bracket, 15...Shaft, 16...Ratchet, 17...Lock tooth, 18...Pole, 20
...Interlocking pin, 21...Release arm, 22...
...Release lever, 23...Interlocking plate, 30
...Arc-shaped groove, 31, 36...Interlocking pin, 32...
Toggle spring, 34... Interlocking protrusion (linking part for release lever), 35... Interlocking protrusion (linking part for upper arm), 33, 40... Tension spring.

Claims (1)

[Claims for Utility Model Registration] An upper arm fixed to the side of the seat bag is pivotally connected to a lower bracket fixed to the rear part of the cushion seat, a ratchet is formed at the lower part of the upper arm, and the upper arm is attached to the lower bracket. A locking member that can be engaged and detached from the ratchet is provided,
In a reclining device in which the locking member is detached from the ratchet by forward rotation of a release member that has an operating section on the side of the upper arm, the release member has an operating section on the side of the upper arm. It consists of a release lever, and a release arm that is coaxial with the release lever and can rotate a certain amount in the front and back direction with respect to the release lever. A spring means for biasing the rotation is provided, and an interlocking plate having the above-mentioned interlocking portion for the upper arm and rotating together with the upper arm when the upper arm is tilted backward is provided, and the interlocking plate further includes a spring means for rotating the interlocking plate rearwardly. A reclining device characterized in that a release lever interlocking portion is provided for causing the release lever to fall back against the spring means when the release lever is moved.