JPH0439719Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat back 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 the back frame, and a plurality of lock pins attached to the base plate so as to be movable in parallel and engaged with lock pins fixed to the vehicle body. A lock plate in which a lock groove is formed, a spring that biases the lock plate in the direction of engagement with the lock pin, and a lock plate that is moved in the anti-engagement direction to release the engagement between the lock plate and the lock pin. It is characterized by having a knob.

[Function] Since the present invention is constructed as described above, the spring-loaded lock plate engages with the lock pin on the vehicle body, and the lock plate moves in the anti-engagement direction by operating the knob. , the angle of the seat back is adjusted by these.

[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. A base plate 3 bent in the other direction is screwed and fixed to the side of a back frame 13 of a seat back such as a rear seat, and a lock plate 1 is attached to this base plate 3.
is attached so that it can move up and down. The vertical movement of the lock plate 1 is achieved by inserting guide pins 4, 5 attached to the base plate 3 into slits 6, 9 formed in the lock plate 1 in the vertical direction. That is, the lock plate 1 has a substantially U-shape in which a long bent piece 1a and a short bent piece 1b are connected, and a slit 9 is formed on the right end side of the long bent piece 1a, A vertically long slit 6 is formed on the left end side of the curved piece 1b, and two guide pins 5 are formed in the slit 9.
However, one guide pin 4 is inserted into the slit 6, and by fixing these guide pins 5 and 4 to the base plate 3, the lock plate 1 can be moved up and down within the length of the slits 6 and 9. It is designed to be able to move in parallel. The heads of each guide pin 5, 4 act to prevent the lock plate 1 from coming off. A hook piece 10 is bent and extended from the upper edge of the lock plate 1, and a tension spring 1 is stretched between the hook piece 10 and the base plate 3. As a result, the lock plate 7 is urged downward and engages with a lock pin 17, which will be described later. Further, the lower end of a transmission member 18 such as a rod or wire is connected to the hook piece 10 of the lock plate 1, and a knob 19 is connected to the upper end of the transmission member 18.
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 lock plate 1 moves upward, and the engagement between the lock plate 1 and the lock pin 17 is released as will be described later. .

Furthermore, a plurality (three in the illustrated example) of lock grooves 2 are provided on the lower edge of the long bent piece 1a of the lock plate 1.
is formed and engages with a lock pin 17 fixed to the vehicle body 16, thereby locking the seat back from tilting. 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 is formed to allow the lock plate 1 to slide along the lock pin 17 and smoothly engage the lock groove and the lock pin 17 to establish a locked state when the seat bag is raised from a forward position. It is something. Further, the left end wall of the lock groove 2 on the left end side is an end stopper 8 extending downwardly, and acts to prevent the lock plate 1 from coming off the lock pin 17 even when the lock plate 1 moves 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, so that the lock plate 1 is pushed upward against the spring 7. Lock pin 17 at the end of the seatback
Since the lock plate 1 overcomes the guide surface 12 of the lock plate 1, the lock plate 1 is moved downward by the urging force of the spring 7, so that the lock groove 2 on the right end side of the lock plate 1 and the lock pin 17 are engaged with each other. 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 lock plate 1 upward. This releases the engagement between the lock groove 2 of the lock plate 1 and the lock pin 17, allowing the seat back to be tilted at an appropriate angle. Then, when the operating force on the knob 19 is released, the lock plate 1 moves downward by the spring force of the tension spring 7, so that one of the lock grooves 2 engages with the lock pin 17, and the angle of the seat back is adjusted. will be held.

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, by assembling the lock plate 1 and the base plate 3, it can be attached to the back frame, and since the whole is flat, it can be easily installed even in a narrow space between the seat back and the vehicle body.

[Effects of the invention] As described above, in the present invention, the lock plate is attached to the base plate so as to be movable up and down, and the lock plate is disengaged from and engaged with the lock pin by this up and down movement. The width of movement of the lock plate required for this is smaller than that required for rotation, and since the lock plate moves parallel to the base plate, the installation thickness of the entire device can be made thinner, and there is no need for the pad of the seat back to escape during installation. It can be easily attached to a normal seat bag.

In addition, this invention has an end stopper formed in the lock groove, so even if the knob is operated by mistake or your hand is carelessly removed from the seat bag while adjusting the tilt angle, the seat bag will not fall backwards, ensuring safe operation. Moreover, since the lock plate has a collapse prevention function and the collapse prevention member can be omitted, the structure is simple and easy to assemble.

[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...
...Base plate, 7... Spring (tension spring),
13...Back frame, 16...Car body, 17...
...Lock pin.

Claims (1)

[Scope of utility model registration request] A base plate is attached to the back frame, and a plurality of lock grooves are formed that are attached to the base plate so as to be movable up and down and engage with lock pins fixed to the vehicle body, and the end wall of the lock groove on one end side is extended downward. a lock plate having an end stopper formed thereon; a spring that engages with the lock pin and urges the lock plate downward; and a knob that moves the lock plate upward to release the engagement between the lock plate and the lock pin. A seat back angle adjustment device comprising: