JPH0440520Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seatback angle adjustment device applied to automobile seats, particularly rear seats.

[Prior Art and Problems] In wagon-type, van-type, and hatchback-type automobiles, the seatbacks of the rear seats can be folded forward in order to expand the rear cargo space. Therefore, when seating on the rear seat, it is necessary to raise the seat back that has been tilted forward and lock it at a predetermined angle. Conventional seat back locking is achieved by attaching a striker to the seat back and engaging the striker with a locking pin on the vehicle body, and the seat back is locked at only a single angle. Therefore, there is a problem in that the angle of the seat back cannot be adjusted and the angle of the seat back cannot be adjusted according to the preference of the seated person.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide an angle adjustment device that allows angle adjustment in multiple stages even when the seat bag can be folded forward.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a base plate attached to a back frame, an intermediate plate attached to the base plate so as to be movable up and down, and an intermediate plate that moves up and down integrally with the intermediate plate. At the same time, a plurality of lock grooves are formed which are rotatably attached to the intermediate plate and engage with lock pins fixed to the vehicle body, and an end stopper is formed by extending the end wall of the lock groove at one end long downward. a spring that urges the intermediate plate in the direction in which the lock plate engages with the lock pin; and a knob that moves the intermediate plate in the opposite direction to disengage the lock plate and the lock pin. It is characterized by having the following.

[Function] Since the present invention is constructed as described above, the lock plate engages with the lock pin on the vehicle body side via the spring-loaded intermediate plate, and is locked together with the intermediate plate by operating the knob. The plates move in the anti-engagement direction, thereby adjusting the angle of the seat back.

[Example] Hereinafter, the present invention will be specifically described with reference to an illustrative example.

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is an assembled perspective view. The angle adjustment device of this embodiment includes a base plate 7, an intermediate plate 3, and a lock plate 1. Base plate 7
is screwed and fixed to the side surface of the back frame 13 of a seat back such as a rear seat. The intermediate plate 3 is attached to the base plate 7 so as to be movable up and down. This vertical movement is achieved by two guide pins 4 and 8 attached to the intermediate plate 3.
This is done by sliding in slits 9, 9 formed in the base plate 7 in the vertical direction. Also, hook pieces 14 and 15 are formed on the intermediate plate 3 and the base plate 7, respectively, and a tension spring 11 is stretched between the hook pieces 14 and 15, and the spring 11 causes the intermediate plate 3 to move downward. energized to move. As a result, the lock plate 1, which will be described later, is urged in the direction of engagement with the lock pin 17 on the vehicle body side. On the other hand, the lower end of a transmission member 18 such as a rod or wire is connected to the hook piece 14 of the intermediate plate 3, and the upper end of the transmission member 18 is connected to a knob 19.
is installed. The knob 19 is pulled out to the upper edge of the seat bag, and when the knob 19 is pulled up, the intermediate plate 3 moves upward, and the engagement between the lock plate 1 and the lock pin 17 is released as will be described later. .

The lock plate 1 is attached to such an intermediate plate 3 and moves up and down integrally with the intermediate plate 3. This lock plate 1 is bent into a substantially U-shape, and a guide pin 4 attached to the intermediate plate 3 is inserted into one of the bent pieces. It is attached so that it can rotate around the center. Here, a torsion spring 10 is fitted onto the guide pin 4, and a hook portion at one end of the torsion spring 10 is hooked onto a hook pin 20 pulled out from one bent piece of the lock plate 1 toward the intermediate plate 3, thereby locking the torsion spring 10. The plate 1 is urged to rotate clockwise about the guide pin 4. Further, an arc-shaped slit 6 is formed in the other bent piece of the lock plate 1, and a pin 5 attached to the intermediate plate 3 is inserted into this slit 6. As a result, the rotation of the lock plate 1 is guided, and the head of the pin 5 prevents the lock plate 1 from coming off. A plurality of (three in the illustrated example) lock grooves 2 are formed on the lower edge of the other bent piece of the lock plate 1, and engage with a lock pin 17 fixed to the vehicle body 16, thereby preventing the seat back from tilting. It's becoming more and more locked down. Of the plurality of lock grooves 2, a guide surface 12 tapered downward to the left is formed on the right side of the right end lock groove 2. This guide surface 12
When raising the seat back that has been folded forward,
It is formed so that the lock plate 1 slides along the lock pin 17 and the lock groove 2 and the lock pin 17 are smoothly engaged to establish a locked state. Further, the left end wall of the lock groove 2 on the left end side is an end stopper 21 extending downwardly, and acts to prevent the lock plate 1 integral with the intermediate plate 3 from coming off the lock pin 17 even when the lock plate 1 is moved upward.

Next, the operation will be explained. When the seat back is tilted forward, the engagement between the lock pin 17 and the lock plate 1 is released, and when the seat back is raised from this state, the guide surface 1 of the lock plate 1
2 slides on the lock pin 17, the lock plate 1 rotates counterclockwise against the torsion spring 10. At the end of the seat back movement, the lock pin 17 overcomes the guide surface 12 of the lock plate 1, so the lock plate 1 rotates clockwise due to the force of the torsion spring 10, and the lock groove 2 on the right end side of the lock plate 1 and the lock pin are thereby rotated. 17 is engaged. Therefore, the seat bag is in the first stage locked state. To adjust the tilt angle of the seat bag from this state, pull up the knob 19 and move the intermediate plate 3 upward. As a result, the lock plate 1 moves upward together with the intermediate plate 3, so that the engagement between the lock groove 2 and the lock pin 17 is released, and the seat back can be tilted at an appropriate angle. After that, when the operating force on the knob 19 is released, the intermediate plate 3 moves downward by the spring force of the tension spring 11, and as a result, the lock plate 1 also moves downward, so that any one of the locks The groove 2 and the lock pin 17 engage to adjust the angle of the seat back.

Therefore, in this embodiment, since the angle of the seat back can be adjusted in multiple stages, the degree of freedom in the sitting posture of the seat back is expanded. Further, in this embodiment, locking and unlocking are performed by vertical movement of the lock plate 1, so that the operation can be performed without difficulty.
Furthermore, the lock plate 1 and the intermediate plate 3 are attached to the back frame by being assembled to the base plate 7, and since the whole is flat, it can be easily installed even in a narrow space between the seat back and the vehicle body.

The present invention is not limited to the above-mentioned embodiments and can be modified in various ways. For example, the number of lock grooves on the lock plate is not limited as long as they are plural.

[Effects of the invention] As described above, in the present invention, a lock plate is rotatably attached to an intermediate plate that moves up and down, the seat back is raised by the rotation of the lock plate, and the seat back is raised by the lock plate that moves up and down together with the intermediate plate. Therefore, even if the seat bag is folded forward, the angle can be adjusted in multiple stages, the structure is simple, and it can be operated reliably. In addition, an end stopper is formed in the lock groove, so even if your hand inadvertently leaves the seat bag while adjusting the inclination angle, the seat bag will not fall backwards, ensuring safe operation, and the lock plate has a fall prevention function. Since it is possible to omit the collapse prevention member by providing the above structure, the structure is simple and assembly is easy.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a perspective view of the assembled state. 1...Lock plate, 2...Lock groove, 3...
...Intermediate plate, 7...Base plate, 11...
... Spring (tension spring), 13 ... Back frame, 16 ... Vehicle body, 17 ... Lock pin.

Claims (1)

[Scope of utility model registration request] A base plate attached to the back frame, an intermediate plate attached to the base plate so as to be movable up and down, and a lock pin fixed to the vehicle body that moves up and down integrally with the intermediate plate and is rotatable relative to the intermediate plate. A lock plate is formed with a plurality of engaging lock grooves, and an end stopper is formed by extending the end wall of the lock groove on one end side downward, and the intermediate plate is moved in the direction in which the lock plate engages with the lock pin. 1. A seat back angle adjusting device comprising: a spring that applies force; and a knob that moves the intermediate plate in the anti-engagement direction to release the engagement between the lock plate and the lock pin.