JPH0631956Y2 - Vehicle seat device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle seat device, and in particular, can tilt a seat back from a seated position to the front or to a so-called full flat rear. At the same time, the present invention relates to an improvement of a vehicle seat device in which the entire seat is pivoted forward and tilted forward to expand the storage space.

[Prior Art] Recently, many vans and wagon-type vehicles featuring multi-purpose equipment have been provided, but above all, the seat back of the seat device is pushed backward substantially horizontally to be used as a bed. A so-called full-flat state so that it can be pushed or pushed down forward to be folded over the seat cushion (see, for example, Japanese Patent Publication No. 56-6888 and Japanese Patent Publication No. 59-131306), and fixed to the vehicle body. The seat frame is provided with a catch that engages and disengages with the striker, and the catch is pivotally operated to be removed, and the entire seat is pivoted forward around the lower front surface of the seat frame to expand the vehicle storage space. Those (see Japanese Utility Model Laid-Open No. 59-62040) are known.

[Problems to be Solved by the Invention] However, according to the above-described conventional seat device, when a seated person is present in the seat, if the operating lever is inadvertently rotated without knowing the seated person, the seat back is Suddenly falling backwards, the seated person is astounded, which is dangerous especially when driving. Therefore, the applicant has provided a reclining device provided with a safety lever for eliminating such inconvenience (Japanese Patent Application No. 62-1 / 1987).
No. 63288, filed on June 30, 1987).

On the other hand, the front lower surface of the seat frame is pivotally supported on the vehicle body, and a catch lever is provided on the rear lower surface of the seat frame. Since the seat device that is made to rotate is operated by its own lever operation of the catch lever, if the reclining device provided with the safety lever according to the above-mentioned application is adopted for the seat, the number of operation levers will be large and it will be complicated. Is.

In view of the above circumstances, the present invention can prevent the danger of a seated person due to the careless rotation of the operation lever in the reclining type seat device, and can perform the operation of the catch that engages and disengages with the striker with the reclining operation lever. The purpose was to reduce the number of operating levers.

[Means for Solving the Problems] In order to solve the above problems, the present invention rotatably supports an arm and a sub arm on a base plate, and a back arm that can be engaged with and disengaged from the sub arm is rotatable on the arm. And a tooth portion formed at the lower end of the arm, and a tooth member having a tooth portion that can be engaged with and disengaged from the tooth portion is rotatably supported on the base plate to rotate the tooth member. In a reclining device in which an operating lever having a cam is rotatably supported by a base plate, and a lower end portion of the sub-arm and an operating lever are connected by a link, a catch lever is rotatably supported by the base plate. At the same time, two cam plates are rotatably and coaxially supported on the shaft of the arm, and one of the cam plates is connected to the key via a spring-biased link. The cam plate is rotatably provided while being connected to the latch lever and pushed by the arm, and the other of the cam plates is rotatably pivotally attached to and connected to a safety lever coaxially supported by the catch lever. An elongated hole formed by continuously forming an arc hole centering on the axis of the operation lever and an arc hole centering on the axis of the catch lever, and a pin which is rotatable integrally with the operation lever in the elongated hole. And a vehicle seat device configured by engaging with each other.

[Operation] Since the present invention is configured as described above, when the normal sitting state is set, the safety lever is operated to engage the pin of the operation lever with the arc hole centered on the axis of the catch lever. As long as it is kept, the operation lever is locked without rotating carelessly, and when pushing the seat back backward, one cam plate is pushed by the arm and rotates to keep the safety lever rotating state Then, the pin is always positioned in the arc hole of the safety lever centered on the axis of the operation lever so that the seat back can be returned to the original state at any time, and the lock of the operation lever is released. When tilted forward, the other side of the cam plate is pushed by the arm and rotates to rotate the catch arm via the link, and the engagement between the catch arm and the striker is automatically released. Then, the arm and the back arm are folded in two stages and the state is locked.

[Embodiment] Hereinafter, the present invention will be described based on an illustrated embodiment. First
As shown in the figure, an arm 3 and a sub arm 4 are rotatably supported by a base plate 1 via a shaft 2. A back arm 6 is rotatably attached to the arm 3 via a shaft 5, and the back arm 6 has engaging portions 8 and 8a with which a stopper pin 7 projecting from an end of the sub arm 4 engages and disengages. A pin 9 is provided which can move a circular arc portion 3a having a constant radius around the axis 5 of the arm 3. Pin 1 protruding from arm 3
A spring 11 is mounted between 0 and the bent portion 4a formed on the sub arm 4. At the lower end of the arm 3, as shown in FIG. 3, a tooth part 13 divided into two parts A and B sandwiching the toothless part 12 is provided on a circumference of a constant radius centered on the shaft 2. , 13a are formed. A stopper 14 is formed at one end of the tooth portion 13. The tooth part 1
A tooth member 16 having tooth portions 15 that can be engaged with and disengaged from the teeth 3 and 13a is rotatably supported by the base plate 1 by a shaft 17, and the tooth portion 16 has the tooth portion 15 sandwiched therebetween. 1 for engaging the stopper 14 and the stopper 14, respectively
Claws 20 are formed at the ends of the recesses 19 and 8, 19, respectively. Further, cam parts 21 and 22 are formed on the tooth member 16. The roller 23 that slides on the cam portion 21 and engages with the cam portion 22 is connected to the shaft 23a.
A cam 24 rotatably supported on the base plate 1 is rotatably supported on the base plate 1 by the same shaft 26 as the operation lever 25. The operating lever 25 is rotatably supported by a shaft 26, one end of a spring 27 is locked to the lower end thereof, and the other end of the spring 27 is locked to a holder plate 28 described later. Then, as shown in FIG. 1 and FIG. 2, a holder plate 28 for covering the above configuration is provided,
A cam plate 29 and a cam plate 30 are rotatably and coaxially supported on the shaft 2 protruding outside the holder plate 28, respectively. The cam plate 29 is formed with a lever protrusion 29a which is a standing bending protrusion with which the side end of the sub arm 4 abuts. Cam plate 30
Is a lever projection 30 which is arranged outside the cam plate 29 and which is a projection with which the pin 10 projecting from the arm 3 abuts.
a is formed. The lower end of the sub arm 4 is disposed outside the holder plate 28, and one end of a link 31 is connected to the lower end by a shaft 32. on the other hand,
An oscillating cam 33 is rotatably supported on the shaft 26 projecting from the holder plate 28 so as to rotate integrally with the operating lever 24, and pins 33a, 33 are provided at both ends of the oscillating cam 33, respectively.
Project b. A long hole 35 formed at the other end of the link 31 is engaged with the pin 33a, and a safety lever 37 having a substantially L-shaped long hole 36 is engaged with the pin 33b. The long hole 36 is an arc hole 36a with a constant radius centered on the shaft 26.
And an arc hole 36 having a constant radius centered on a shaft 38 described later.
b. The safety lever 37 is provided on the base plate 1 so as to project from the holder plate 28.
Is rotatably pivotally supported, one end of which is formed with a lever projection 39 which is orthogonal to the outside, and the other end of which is connected to the cam plate 29 through a shaft 40. A catch lever 41 is rotatably supported on the shaft 38. The catch lever 41 has a hook portion 43 which is engageable with and disengageable from the striker 42 at one end, and has a link 45 at the other end via a shaft 44.
Is rotatably connected to one end of the. The other end of the link 45 is rotatably connected to the cam plate 30 via a shaft 46. The link 45 has a protrusion 4 at the substantially central portion thereof.
7 are formed, and the protrusion 47 and the holder plate 28 are formed.
A spring 48 is mounted between and. Incidentally, shaft 2
A spring-shaped return spring 50 is elastically mounted between and and a pin 49 protruding from the holder plate 28 to urge the arm 3 to rotate counterclockwise in the drawing.

Next, the operation of the above-described embodiment will be described. In a normal sitting state, the arm 3 is in the state shown by the solid line in FIG. 1, and the arm 3 is inclined with the sub-arm 4 and the back arm 6 in a predetermined manner. In this case, the tooth member 16 in FIG. 3 has its teeth 15 meshing with the teeth 13 in the portion B of the arm 3 and the cam portion 2 of the tooth member 16 is in this position.
The roller 23 is in contact with 1, and the operation lever 25 is rotated counterclockwise by the force of the spring 27. And the first
As shown in the figure, the safety lever 37 is rotated clockwise about the shaft 38 via the lever protrusion 39 to move the long hole 3
If the pin 33b is engaged with the circular arc hole 36b of No. 6, the operation lever 25 is locked so as not to rotate. Further, the catch lever 41 is engaged with a striker 42 provided on the vehicle body.

To push the seat back backward from the seatable state (P line in FIG. 1), the lever projection 39 of the safety lever 37 is rotated counterclockwise about the shaft 38 as shown in FIG. Then, the operation lever 25 is rotated clockwise. At this time, since the pin 33b is moving from the arc hole 36b of the elongated hole 36 to the arc hole 36a, the rotation of the operation lever 25 can be permitted. As the operation lever 25 rotates, the roller 23 moves to the cam portion 22 of the tooth member 16 in FIG. 3, and the tooth member 16 rotates counterclockwise about the shaft 17 to rotate the tooth member 16 and the arm 3. Is disengaged, and the arm 3 becomes rotatable about the shaft 2. Then, when the arm 3 is rotated clockwise about the axis 2, the toothless portion 12 moves to the recess 19 of the tooth member 16, and the tooth portion 13a of the arm 3 in the range A is the tooth portion of the tooth member 16. It becomes possible to mesh with 15. Therefore, the arm 3 and the back arm 6 can be tilted rearward substantially horizontally, the sub-arm 4 abuts against the standing bent end 29a of the cam plate 29 to prevent counterclockwise rotation of the cam plate 30, and the safety lever 37 counterclockwise. Rotate in the direction of pin 3
Prevent locking 3b. The operating lever 25
Is returned to its original state (FIG. 1) by the force of the spring 27. Therefore, by re-operating the operating lever 25, the arm 3 and the back arm 6 can be returned to their original states by the force of the return spring 50.

Next, in the operation of folding the seat back over the seat cushion from the state shown in FIG. 1 (Q line in FIG. 1), as shown in FIG. 5, first, the safety lever 37 is centered around the shaft 38. Rotate in the counterclockwise direction to make the arc hole 3 of the long hole 36.
6A, the pin 33b is positioned, and first, like the above-described operation, the operation lever 25 is rotated clockwise about the shaft 26 to release the engagement between the tooth member 16 and the arm 3, and the arm 3 is rotatable. When the arm 3 is rotated counterclockwise, the pin 10 protruding from the arm 3 rotates the lever protrusion 30a of the cam plate 30 counterclockwise about the shaft 26, whereby the link 45 is rotated. Moves downward against the force of the spring 48, and the catch lever 41
Is rotated counterclockwise about the shaft 38, and the hook portion 43 separates from the striker 42. The sub arm 4 rotates counterclockwise, so that the link 3
The end face of the long hole 35 of No. 1 and the pin 33a come into contact with each other, and the link 31
The operating lever 25 remains pulled in the clockwise direction. Then, when the operation lever 25 is rotated counterclockwise about the shaft 26, the pin 33a pulls the link 31 to the left in the drawing, whereby the sub arm 4 is rotated clockwise about the shaft 29. The pin 7 protruding from the sub arm 4 is disengaged from the recess 3b of the arm 3 and the recess 8 of the back arm 6. Therefore, the back arm 6 becomes rotatable about the shaft 5 in the counterclockwise direction.
Therefore, the back arm 6 is rotated counterclockwise (see Q in FIG. 1).
Line), the pin 9 moves along the arcuate portion 3a, the concave portion 8a and the concave portion 3b of the arm 3 are aligned, and when the operation lever 25 is released, the sub-arm 4 causes the spring 1 to move.
While being rotated counterclockwise by the force of 1, the operation lever 25 is pulled by the link 31 and rotated clockwise. Then, the pin 7 engages with the matching recesses 3b and 8a, and the back arm 6 is locked in that state. Thus, since the catch lever 41 is disengaged from the striker 42 and the back arm 6 is tilted forward and locked, the storage space can be expanded by rotating the entire seat device forward. It should be noted that the seat apparatus as a whole is rotated back to the original state, the operation lever 25 is operated, the back arm 6 is rotated clockwise about the shaft 5, and the pin 10 separates from the lever projection 30a. The plate 30 returns to its original state by the force of the spring 48 that urges the link 45 upward, so that the catch lever 41 rotates clockwise about the shaft 38 and can be engaged with the striker 42 again. Become.

As described above, according to the above-described embodiment, the operating lever 25 is provided with the long hole 3 of the safety lever 37 when it is in a seatable state.
Pin 33b integral with the operating lever 25 in the circular arc hole 36b of 6
Since the operation lever 25 is locked unless the safety lever 37 is pivotally operated by engaging with, the back arm 6 that supports the seat back does not inadvertently bend back while seated. Further, when the arm 3 and the back arm 6 are pushed backward, the cam plate 29 moves the safety lever 37.
Since the lock is automatically released by rotating the pin 33b to move the pin 33b to the circular arc hole 36a, the operation lever 25 can be rotated at any time, and the seat back can be quickly restored. Further, when the seat back is tilted forward, the cam plate 30 is pushed by the arm 3 and rotates to release the engagement between the catch lever 41 and the striker 42, thereby facilitating the rotation of the entire seat device. Therefore,
A unique operating lever for operating the catch lever 41 is not required.

[Advantages of the Invention] According to the invention described above, in a normal sitting state, the operation lever is locked and cannot be carelessly rotated, but when the seat back is pushed backward, Since a safety lever is provided to prevent the operating lever from being locked, it is safe not to inadvertently rotate the operating lever by an external force against the occupant's will when seated.
When returning the seat back from the tilted state to the seatable state, it is extremely convenient because it can be performed without operating the safety lever. Also, when the catch lever is integrated and the seat back is tilted forward, the catch lever automatically separates from the striker, which simplifies the operation of rotating the entire seat device, and also the operation lever dedicated to the catch lever. Since it is not necessary to provide the above, it is possible to reduce the number of operation levers.

[Brief description of drawings]

FIG. 1 is a front view showing a reclining device according to the present invention, FIG. 2 is an exploded perspective view showing an essential part of the present invention, and FIGS. 3 to 5 are operation explanatory views. 1 ... Base plate, 2, 5, 17, 26, 38 ...
Axis, 3 ... Arm, 4 ... Sub arm, 6 ... Back arm, 7 ... Stopper pin, 9, 10, 33a, 33
b, 49 ... pins 11,27,48 ... springs,
16 ... Tooth member, 24 ... Cam, 25 ... Operating lever, 28 ... Holder plate, 29, 30 ... Cam plate, 31, 45 ... Link, 33 ... Swing cam, 3
5, 36 ... long hole, 37 ... safety lever, 39 ... lever projection, 41 ... catch lever, 42 ... striker, 43 ... hook part, 50 ... return spring.

Claims (1)

[Scope of utility model registration request] 1. An arm and a sub arm are rotatably supported by a base plate, and a back arm is rotatably supported by the arm, and a tooth portion is formed at a lower end of the arm. Then, a tooth member having a tooth portion that can be engaged with and disengaged from the tooth portion is rotatably supported on the base plate, and an operation lever having a cam for rotating the tooth member is rotatably supported on the base plate. In the reclining device in which the lower end of the sub arm and the operation lever are connected by a link, the catch lever is rotatably supported by the base plate, and the two cam plates are rotated by the shaft of the arm. The shaft is supported coaxially as much as possible, and one of the cam plates is connected to the catch lever via a spring-biased link and is rotated by being pushed by the arm. And the other side of the cam plate is rotatably pivotally attached to and connected to a safety lever that is coaxially supported by the catch lever. The safety lever has an arc hole centered on the axis of the operation lever and the catch. A vehicular seat characterized in that it has an elongated hole formed by continuously forming an arcuate hole centered on a lever axis, and a pin rotatable integrally with the operation lever is engaged with the elongated hole. apparatus.