JPS63183013A - Reclining apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a red camellia half reclining device configured to freely adjust the tilting angle of a seat back with respect to a seat cushion.

[Conventional technology]

For example, in a vehicle seat, a reclining device is provided between the seat cushion and the seat back, and the tilting angle of the seat back can be freely adjusted with respect to the seat cushion according to the physique and preferences of the seated person.
This has been commonly done for a long time.

By the way, what is required of this type of reclining device is that it not only has a simple configuration, excellent workability and assemblability of each part, and low cost, but also allows the seat back to be adjusted freely and in an appropriate manner. The tilting angle can be adjusted and the adjustment operation is extremely easy, and the positional relationship between the seat cushion and seat back can be locked and maintained securely against the load of the seated person. It's about getting. Taking these points into consideration, various configurations have been proposed in the past, the simplest of which is a lock plate with a plurality of ratchet teeth and a lock that selectively engages with the lock plate. A structure has been known in which a lock lever having a claw is provided on an arm on the seat back side and a base on the seat cushion side.

[Problem that the invention seeks to solve]

However, according to the conventional reclining device having the above-mentioned configuration, when a seated person is seated on the seat and a load is applied to the seat back side, the ratchet teeth of the lock plate on the arm side cause a lock lever having a lock pawl that engages with the ratchet teeth of the lock plate on the arm side. In order to prevent this, a spring member with a large biasing force is used to bias the lock lever in the +1 direction of the locking claw. It was something that had to be used. If a strong spring member is used or a roller or the like is used to press the lock pawl, a large operating force is required to release and adjust the lock, resulting in problems such as operability. Therefore, it is necessary to take some measures that can eliminate these problems and satisfy all of the above-mentioned requirements.

[Means for solving problems]

In order to meet such demands, the reclining device according to the present invention includes a base on the seat cushion side and an arm on the seat back side that are rotatable with respect to each other, a lock plate provided on the arm side and having teeth, and a lock plate on the base. a lock lever having a lock pawl that is rotatably supported on the shaft and engages with the southern part, and an engaging portion that is rotatably supported at one end at an eccentric position and that engages with the lock lever in a locked state at the other end. , a second link rotatably supported on the base and one end of which is rotatably supported with the other end of the first link, and a connecting side shaft support of both links. The structure includes a tension spring stretched between the base and the lock lever so as to cross over the line connecting the shaft supports on the opposite side of each link and lock the lock lever by engagement of the engaging portion. be.

[Effect]

According to the present invention, the lock lever is rotated so as to be separated from the teeth of the lock plate by moving the engaging portion at the other end of the link of ff1l in the opposite direction against the biasing force of the tension spring. , and when the connecting side shaft portions of both the links cross over the line connecting the opposite side shaft portions of each link and engage the locking portion with the lock lever, the connecting side shaft portions of the two links mesh with the teeth on the arm side. It operates to maintain the locked state.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail using embodiments shown in the drawings.

1 and 2 show an embodiment of a vehicle seat equipped with a reclining device according to the present invention. In these figures, the vehicle seat designated by the symbol l has a seat cushion 2, as is well known. and a seat back 3 (both partially shown in phantom lines), from one side of the seat 1 with respect to the seat cushion 2 and seat back 3. The constituent base 11 and arm 12 are each fixedly attached by screws or the like, and the base 11 and arm 12 are pivotally supported so as to be rotatable relative to each other about a pivot shaft 13.

The reclining device 10 according to the present invention includes a lock plate 14 that is integrally provided with the arm 12 on the seat back 3 side and has, for example, a plurality of ratchets 114a, and a support shaft on the base 11 on the seat cushion 2 side. The lock lever 16 is rotatably supported via a ratchet lever 15 and integrally has a lock pawl 16a that engages with the ratchet teeth 14a. Here, in this embodiment, a two-tooth structure is adopted as the lock pawl 16a, so that the meshing state with the ratchet) can be reliably achieved, and the rotational force on the lock plate 14 side due to the load from the seated person can be prevented. However, it goes without saying that the structure is not limited to this. Furthermore, in this embodiment, the lock plate 14 is constructed separately from the arm 12, and the lock lever 16 has a lock pawl 16a integrated therein. Although the case in which the ratchet teeth 14a are configured is shown, the ratchet teeth 14a
is formed integrally with the arm 12, or the lock claw 16a is formed integrally with the arm 12.
Of course, it is also possible to attach it to the lock lever 16 as a separate component.

Alternatively, the ratchet 14a may be formed as a single tooth and may be configured to mesh at the - position.

According to the present invention, in the reclining device 1O having such a configuration, the first link 18 is rotatably supported at one end at an eccentric position of the lock lever 16 via the support shaft 17. A roller portion 19 is provided at the other end of the first link 18 as an engaging portion that engages with the lock lever 16 side in a locked state, and a support shaft 20 coaxial with the roller portion 19 is provided. Second
link? (2) are connected in a rotatable manner. Further, the other end side of the second link 21 is rotatably supported on the base 11 via a support shaft 22, and the second link 2'l is rotatably supported on the base 11 via a support shaft 22.
A part of the lever is integrally extended in the opposite direction, and this part of the lever is connected to this reclining device! 110 as the operating lever 23. Further, a tension spring 25 is stretched between the support shaft 20, which is the connecting side shaft support of both the links 18 and 21, and a stop pin 24 provided on the base 11.
This applies a biasing force so that the roller portion 19 coaxial with the support shaft 20 comes into contact with the lock lever 16 side. Here, reference numeral 16b in the figure is a concave contact portion formed on the side edge portion of the lock lever 16 opposite to the lock pawl 16a. By engaging the roller portion 19 with this contact portion 16b, the lock lever 16 is 16 in the counterclockwise direction in the figure, a locked state in which it meshes with the ratchet teeth 14a on the arm 12 side is obtained.

Further, in this embodiment, the support shaft 22 of the second ring 21 described above is an eccentric shaft 22a, as illustrated.

22b, which allows movement of the link system and provides a locked state without rattling.

In such a configuration, the operating lever 23
Rotate upwards in the figure and move to the second link? ■The support shaft 22
When rotated counterclockwise around
rotates clockwise in the figure, and as a result, both links 1
The roller portion 19 provided on the connecting side shaft support of 8.21 moves downward against the biasing force of the tension spring 25, and the lock lever 16 is released from the engaged state, and the first link 18 is released. A rotational force is applied to the lock lever 16 in the counterclockwise direction in the figure through the support shaft 17, and as a result, the mesh is disengaged and the locked state is released, allowing the seat back 3 to be adjusted to any desired inclination angle.

On the other hand, when the seat back 3 is adjusted to the required state and the control lever 23 is released, the second link 21 and the fj4
The links 18 of t are each rotated by the tensile force of the tension spring 25, and the roller portion 19 integrated with the support shaft 20 on the connecting side of both links 18.21 is rotated at the opposite end of each link 18.21. Support shaft 17.22 that supports the side
Move over the line segment a connecting the two and move to the lock lever 16 side,
Engage with the concave abutting portion 16b and rotate it in the locking direction, that is, clockwise in the figure, so that it engages with any position of the ratchet teeth 14a on the arm 12 side to obtain a locked state at the desired adjustment position. is possible. In this locked state, even if a rotational force from the arm 12 side acts on the lock lever 16 in the unlocking direction,
This acting force is applied to the roller portion 19 via the first link 18.
This is the force that engages the lock lever 16 from the locking direction, thereby maintaining the locked state. That is, the link configuration according to the present invention skillfully utilizes the fact that the movable direction of the supporting shaft 20 on the connecting side of both links 18 and 21 is reversed by overcoming the dead point on the line segment a. It is.

Therefore, according to the device of the present invention, since the lock lever 16 can be maintained in the locked state by the link structure, it is possible to use a tension spring 25 with a weaker biasing force than in the past, which reduces the overall strength of the device. The structure is simplified, and it is possible to improve the workability and assemblability of each part, and also to achieve advantages such as cost reduction.

It should be noted that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part may be modified and changed as necessary, and various modifications are possible. For example, the concave abutment part 16b of the lock lever 16 and the roller part 19 that engages therewith should have a shape and structure that allows a reliable engagement state to be obtained and also allows them to slide and separate from each other when the lock lever is released. If so, suitable modifications can be considered. Further, the tension spring 25 that biases the roller portion 19 toward the lock lever 16 is hooked at the stop pin 24 position on the base 11, for example, at the support shaft 15 of the lock lever 16. It is easy to understand that this is a good thing.

Furthermore, in two-door type automobiles, it is necessary to tilt the front seat back 3 forward so that it overlaps the seat cushion 2 when a person sitting on the rear seat side gets on or off the vehicle. According to the reclining device IO according to the invention, as an operating means for the rear seat occupant, the first link 18 rotatably supported on the lock lever 16 is arranged in a substantially triangular shape as shown in FIG. It is possible to form the release wire 30 into a shape and provide a release wire 30 that applies a tensile force at a position different from the support shaft 17.20. and.

In this way, this sheet 1 can be used as a walk-in sheet, which has great advantages.

〔Effect of the invention〕

As explained above, according to the reclining device according to the present invention, the lock plate is provided on the arm on the seat pack side and has a toothed portion, and the lock plate is rotatably supported on the base on the seat cushion side and is attached to the toothed portion. a lock lever having a lock pawl that engages with the lock lever; a first link having one end rotatably supported at an eccentric position of the lock lever and having an engaging portion at the other end that engages with the lock lever in a locked state; A line that connects a second link that is rotatably supported and whose one end is rotatably supported with the other end of the first link, and a connecting side shaft support of both links between the opposite side shaft supports of each link. Overcome the minute lock lever
and a tension spring stretched between the base and the base so as to be locked by engagement of the engaging portion, the structure of each part is simplified despite the simple structure, In particular, since the locked state can be achieved with a link configuration, a tension spring with a weak biasing force can be used to bias the lock lever in the locking direction.This allows for excellent workability and assembly, and reduces costs. There are various excellent effects such as being able to

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing one embodiment of the reclining device according to the present invention, Fig. 2 is an enlarged side view of the main part for explaining the main part configuration and operating state, and Fig. 3 is a schematic side view showing an embodiment of the reclining device according to the present invention. FIG. 3 is a schematic diagram showing another embodiment. In the figure, 1... Vehicle seat, 2... Seat cushion, 3... Seat back, 10... Reclining device, 11... Base, 12... Arm, 13...
- Pivot shaft, 14... Lock plate, 14a... Ratchet m1 part), 15.17, 20.22... Support shaft, 16... Lock lever - 116a... Lock claw, 1
6b... Concave contact portion, 18... First link, 19
... roller part (engaging part), 21 ... second link,
23... Operating lever, 25... Tension spring, 3
0...Release wire. Figure 1 u 23 Figure 2 Figure 3

Claims (1)

[Claims] a base on the seat cushion side and an arm on the seat back side that are rotatably supported on the same axis; a lock plate that is provided on the arm side and has a toothed portion; and a lock plate that is rotatably supported on the base and that is A lock lever having a lock pawl that engages with a tooth portion, one end of which is rotatably supported at an eccentric position of the lock lever, and an engaging portion that engages with the lock lever in a locked state is provided at the other end. a first link rotatably supported on the base, and a second link having one end rotatably supported on the other end of the first link; A tension tension member is provided between the connecting side shaft support and the base so that the connecting side shaft support crosses the line connecting the opposite side shaft support of each link to the lock lever side and locks this lock lever by engagement of the engagement portion. A reclining device characterized by comprising a spring.