JPH0522527B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improvements in vehicle seat devices.

BACKGROUND OF THE INVENTION Recently, so-called multi-purpose vehicles have become popular, such as wagons and vans, in which the seats can be converted into a sitting position, a luggage space, a bed space, etc., and the interior space of the vehicle can be effectively utilized. Therefore, if the seatback of the seat system can be folded forward as much as possible, or if the seatback can be folded forward and folded almost parallel to the seat cushion to form a table shape, the interior space of the vehicle can be used effectively. Conceivable.

Therefore, a seat device has been provided in which the seat bag can be folded forward and folded into a state substantially parallel to the seat cushion (see, for example, Japanese Utility Model Application No. 56-9930). In this seat device, the side of the seat back is pivotally supported by a seat back support arm in a reclining device at a single pivot point, and a pin is provided protruding from the side of the seat back at the bottom of the pivot, and a hook portion that engages and disengages from the pin is provided. The formed lock plate is rotatably supported on the seat back support arm, and a connecting member for rotating the lock plate is connected to the operating lever so that the seat can be reclined by rotating the operating lever. When the seat bag is tilted forward in the adjustment state, the lock plate rotates via the connecting member at the forwardmost position, and its hook portion disengages from the pin of the seat bag.Therefore, the seat bag is attached to the seat bag support arm. On the other hand, it is designed to be able to be transformed into a forward-folded state (folded in half) approximately parallel to the seat cushion around the pivot axis.

Problems to be Solved by the Invention However, according to the above-mentioned known example, in order to move the seat back forward, it is necessary to operate the control lever in the same way as when adjusting the reclining position, and then operate the seat back forward. When attempting to adjust the seat bag, the seat bag may be folded in half by mistake, and in this case, if the operator faces the seat bag and operates it, the seat bag may inadvertently collide with his/her face, resulting in an unexpected injury. do. That is,
There is no clear distinction between the operation of the operating lever for the reclining operation and the seatback folding operation.
Naturally, the operator may be confused. As a result, there is a high possibility of erroneous operation, which may lead to manufacturer liability issues.

Therefore, the present invention was developed in view of the above problems.The reclining adjustment is performed by rotating the control lever in the forward direction, and when folding the seat bag in half overlapping the seat cushion, the reclining adjustment is performed by rotating the control lever in the opposite direction. The object of the present invention is to provide an automobile seat in which the two can be clearly distinguished by a single lever operation.

Means for Solving the Problems The automobile seat device according to this invention includes a base plate fixed to a seat cushion, a lower arm rotatably connected to the base plate, and a lower arm rotatably connected to the base plate. a back arm consisting of an upper arm that is pivotally connected and fixed to the seat back; a means for regulating the most forward tilted position of the back arm; a reclining device that rotatably biases the back arm to adjust it so that it can tilt relative to the base plate; a support member whose portion is constantly biased to rotate so as to be engageable with the upper arm, and whose other end portion is rotatable by being connected to an operating lever;
The reclining device is operated by being connected to a supporting member and rotating in one direction, and only when the seat back is in the most forward tilted position, the supporting member is rotated by rotating in the other direction. It is characterized by an operating lever that releases the engagement with the upper arm.

Function: According to this invention, the reclining adjustment, folding in half, and fully resting state are all performed using the operating lever, with the back arm being able to be tilted relative to the base plate. Therefore, in order to fold the seat in half, the seat back is automatically tilted forward by the force of the spring when the operating lever is operated, and stops at the most forward tilted position, while a support member that is linked to the movement of the back arm moves the operating lever to the upper limit position. When the operating lever is rotated in the opposite direction, the support member rotates to release the engagement with the back arm, and the seat back rotates relative to the back arm and engages the seat cushion. Can be folded into a nearly parallel state.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

In FIG. 1, 6 is a seat cushion and 7 is a seat bag. A base plate 9 and a back arm 10 are attached to the seat cushion 6 and the seat back 7, and the back arm 10 is rotatably supported by a rotation shaft 11 fixed to the base plate 9. 13 is a spiral spring;
As shown in the figure, the central end 13a is engaged in the notched groove formed by the rotation shaft 11, and the outer end 13b is engaged with the pin 15 implanted in the back arm 10, so that the back arm 10 is constantly rotated counterclockwise as shown in the figure. biased in the direction. The back arm 10 is equipped with a reclining device 17 that can selectively adjust the tilt position in multiple stages between an upright standard position O and a fully flat position P at the rear end. The reclining device 17 is
An upper tooth 25 having a plurality of locking teeth 19, a sliding protrusion 21, and a recess 23 formed on the periphery of the base end of the back arm 10, and a locking tooth 27 that is the same as the locking tooth 19 of this upper tooth 25 and sliding It consists of a lower tooth 31 having a notch 29 that fits into the movable projection 21, and an operating lever 8 that operates the lower teeth 31 to move forward and backward with respect to the upper tooth 25. The lower teeth 31 are rotatably supported on the base plate 9 by a support shaft 33, and the locking teeth 27 of the lower teeth 31 are opposed to the locking teeth 19 of the upper teeth 25. The base end side of the operating lever 8 is rotatably attached to the base plate 9 via a lever shaft 35. Further, a cam plate 37 that acts on the cam surface 31a of the lower teeth 31 is fixed to the lever shaft 35, and the operating lever 8 and the cam plate 37 are integrally fixed via the lever shaft 35.

The operating lever 8 is connected to the cam protrusion 37 of the cam plate 37.
When a is acting on the first cam surface 31b of the cam surface 31a of the lower tooth 31, the lock is activated and the tooth is at the lowest position, and the locking teeth 27 and 19 of the lower tooth 31 and the upper tooth 25 are in mesh. Furthermore, when the cam protrusion 37a acts on the second cam surface 31c of the cam surface 31a, the lower teeth 31 and the upper teeth 25 are in the uppermost position and the locking teeth 27, 19 are out of mesh. The function of the so-called reclining device 17 is set to be in a lock-off state. Note that 39 is a return spring for constantly pressing the cam protrusion 37a of the cam plate 37 against the first cam surface 31b; one end is a sub-spring integrally fixed to the cam plate 37 and the other end is integrally fixed to the base plate 9. They are each attached to a plate 41.

On the other hand, the back arm 10 is formed of an upper arm 43 fixed to the seat back 7 and a lower arm 45 rotatably supported on a rotation shaft 11 fixed to the base plate 9, and a connecting portion between the upper arm 43 and the lower arm 45 is the arm pivot shaft 47 and the locking part 4
It is connected and supported at two points 9. One end of the connecting portion is rotatably supported by the arm pivot shaft 47, and the other end of the connecting portion is provided with a locking portion 49 that can be freely engaged and detached. Engagement grooves 43a and 45a are formed in the upper arm 43 and the lower arm 45, and the engagement grooves 43a and 45a are cut out toward the rear. , 45a coincide with the locking portion 49.
The structure is such that the two engage and disengage. The locking portion 49 is fixed to one end of a support member 51 pivotally attached to the rotation shaft 11. A pin 51a is implanted at the other end of the support member 51, and a link lever 53 is hung between this pin 51a and a pin 8a implanted in the operating lever 8. This link lever 5
3 is formed with an elongated hole 53a, into which the pin 8a of the operating lever 8 is loosely fitted, and this elongated hole 53a is connected to the link lever when the seat back 10 is between the standard position O and the full-rat position P. 53 moves along with the seat bag 10, and the pin 8a does not affect the link lever 53 even when the operation lever 8 is operated. Also, in the standard position O, the pin 8a is attached to the elongated hole end 53b of the link lever 53. It is formed so as to be in approximate contact with. Reference numeral 55 denotes a tension spring, which is tensioned between the pins 15 implanted in the lower arm 45 of the support member 51, and continuously moves the support member 51 in the counterclockwise direction as shown in the figure, that is, the locking portion 49 is pulled into the engagement groove 43.
a, 45a are biased in the direction of engagement. As mentioned above, the pin 15 implanted in the lower arm 45 is a locking part for the spiral spring 11 and the tension spring 55, and is loosely fitted into the arc-shaped long hole 9a centered on the rotating shaft 11 in the base plate 9. The tilting range of the seat bag 10 is regulated.

Next, the operation will be explained. First, in adjusting the inclination angle of the seat back 10 in the seated state, when the operating lever 8 is rotated clockwise in FIG. Second
The locking teeth 2 of the lower teeth 31 are brought into contact with the cam surface 31c and rotated in the counterclockwise direction shown in the figure.
7 and the locking teeth 19 of the upper teeth 25 are released.

In this state, the seat back 10 can be tilted backward against the biasing force of the spiral spring 11 and adjusted in multiple stages up to the full flat position P. When the operating lever 8 is released when the seat back 10 is at the desired tilted position,
The operating lever 8 rotates counterclockwise in the drawing due to the bias of the return spring 39, and at the same time, the cam protrusion 37a of the cam plate 37 slides into contact with the first cam surface 31b of the lower tooth 31, rotating the lower tooth 31 clockwise in the drawing. The locking teeth 27 of the lower teeth 31 mesh with the locking teeth 19 of the upper teeth 25.

Next, tilt the seat back 10 forward and the upper arm 4
If you want to fold it in half by folding down 3, press the operating lever 8.
When rotated clockwise in the figure, the lower teeth 31 are disengaged from the upper teeth 25, and the back arm 10 is rotated counterclockwise in the figure by the force of the spiral spring 13 as a unit of the upper arm 43, the lower arm 45, and the support member 51. The pin 15 implanted in the lower arm 45 rotates until it comes into contact with the front end of the elongated hole 9a of the base plate 9, and then stops. Therefore,
The seat bag 10, which is urged to rotate by the force of the spiral spring 13, does not collide with the operator's face, and is safe. In this position, the seat bag 10 is in a state in which the locking portion 49 of the support member 51 is fitted into the engagement grooves 43a, 45a of the upper arm 43 and lower arm 45. At this time, the link lever 53 connected to the support member 51 also rotates and pulls the pin 8a of the operating lever 8, so even if the operating lever 8 is released, the operating lever 8 remains at the disengaged state position M.

Therefore, when the operation lever 8 is rotated to the lock position L, that is, when the operation lever 8 is operated in the opposite direction to the above operation, the support member 51 is rotated clockwise through the link lever 53 against the tension spring 55 and locked. Part 49
is disengaged from the engagement grooves 43a, 45a, and the upper arm 43 is tilted forward with respect to the lower arm 45 about the pivot shaft 47, that is, freely rotatable in the counterclockwise direction in the drawing, and the seat back 7 is moved from the seat cushion 6. It will be folded in half so that it overlaps with the .

In addition, when restoring the seat folded in half in this way, move the upper arm 43 clockwise in the figure to the engagement groove 43a of the upper arm 43.
All you have to do is rotate it until 9 is inserted.

In the above embodiment, the support member 51 and the operating lever 8 are connected by the link lever 53, but the link lever 53 is not limited to this, and the supporting member 51 may be extended and connected to the operating lever 8. , or a wire may be used instead of the link lever 53. Further, the locking mechanism of the reclining device and the back arm is not limited to the above-mentioned embodiment, and may be any mechanism that can adjust the inclination angle of the base plate and the back arm and release the engagement between the upper arm and the lower arm.

Effects of the Invention As explained above, according to the present invention, the reclining device can be unlocked by operating one operating lever in one direction, the reclining adjustment can set the inclination angle of the seat back in multiple stages, and the seat back Not only can the seat back be folded backwards into a fully flat state, but the seat back can also be folded in half by operating the operating lever in the other direction only in a limited position, i.e., the most forward tilted position of the seat back. Only by operating the lever in one direction, the seat bag will not be folded in half accidentally, and there will be no risk of the seat bag colliding with the operator's face. It is clearly distinguishable and safe.

Further, since a conventional reclining mechanism can be used, there are excellent effects such as requiring few design changes.

[Brief explanation of drawings]

FIG. 1 is a side view of a seat equipped with the device of the present invention;
FIG. 2 is a front view of the device of the present invention, and FIG. 3 is a side view of FIG. 2. 6...Seat cushion, 7...Seat back, 8...Operation lever, 9...Base plate,
DESCRIPTION OF SYMBOLS 10... Back arm, 17... Reclining device, 43... Upper arm, 45... Lower arm, 51... Support member.

Claims (1)

[Claims] 1. A back arm consisting of a base plate fixed to the seat cushion, a lower arm rotatably connected to the base plate, and an upper arm rotatably connected to the lower arm and fixed to the seat back. , a means for regulating the most forward tilted position of the back arm, a reclining device that rotatably biases the back arm and adjusts it so that it can tilt with respect to the base plate, one end of which is constantly rotatably biased so as to be engageable with the upper arm, and a support member whose other end is rotatable by being connected to an operating lever; and the reclining device is operated by being connected to the support member and being rotated in one direction, and only when the seat back is in the most forward tilted position. 1. An automobile seat device comprising: an operating lever that rotates the support member in the other direction to release the engagement between the support member and the upper arm.