JPS6242832Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a seat back folding device for a split seat. Conventionally, in a split seat equipped with two seat backs divided into left and right,
It was not possible to move the two seat backs forward at the same time, and it was necessary to separately operate the levers provided for each seat bag. Therefore, if you want to move the left and right seat backs forward, you cannot operate both seat backs from one side of the seat, so you must first move one seat back forward, then move to the opposite side and move the other seat back forward. It was a hassle to have to do it. Therefore, the present invention was made in view of the above-mentioned conventional problems, and it is possible to move both seat backs forward at once by simply operating one release lever, or it is possible to move only one seat back forward. It is an object of the present invention to provide a device for folding a seat bag forward. Therefore, in the present invention, a left-right interlocking shaft whose both ends are rotatably pivotally connected to both bases is disposed between bases fixed to both left and right sides of the seat cushion of the split seat, and both ends of the left-right interlocking shaft A transmission piece is fixed to the part, and a transmission member is interposed between the transmission piece and the release lever, and the transmission member is provided on the release lever and transmits the movement of one release lever to the other release lever. The member and the transmission piece are connected through a predetermined amount of play, and the front end of the base has an undulating edge having two hooks formed by two pairs of vertically continuous unevenness. The release lever is provided with a roller that rolls on the undulating edge of the base and slides the release lever in the front and back direction, and the roller is disposed between the roller and the release lever and rolls on the undulating edge of the base. A spring is provided that urges the release lever to be pressed, and the spring and the two latching portions increase the operating force of the release lever when the roller fully rides the latching portion, and the release lever is operated in two stages. In the first step of operation of one release lever, the locking tooth of the lower tooth on the one release lever side and the locked tooth of the seat back arm are disengaged, and further,
In the second stage of operation of the release lever, the transmission member contacts the transmission piece beyond the play provided between the transmission member and the transmission piece, rotates the transmission piece, and then The other transmission piece is rotated, the other release lever is rotated by the other transmission piece, and the locking tooth of the other lower tooth and the locked tooth of the other seat back arm are disengaged from each other. By creating a structure similar to the above, the intended purpose was achieved. The present invention will be described below with reference to illustrative embodiments. 1 is a split seat seat cushion,
2 and 2' are seat bags divided into left and right halves. Seat back frames 2a and 2'a are installed inside the seat backs 2 and 2', respectively;
The opposing inner lower ends of the seat back frames 2a, 2'a are rotatably connected to each other by pivot pins 2c. Further, at the outer lower ends of both seat back frames 2a, 2'a, that is, at the portions corresponding to both side ends of the split seat, there are seat backs each having a tooth pattern 14, which becomes a tooth to be locked, formed on the lower edge thereof. A reclining arm 3, which is an arm, is fixed. The lower end of the reclining arm 3 is pivotally connected via a support shaft 4 to a base 5 fixed to the rear end portions of both left and right ends of the seat cushion 1. The reclining arm 3 is attached to the support shaft 4.
A return spring 9 acting on the
The seat backs 2, 2' are always urged in the forward direction. Reference numeral 8 denotes a release lever that is bent into a substantially V-shape, and the bent portion of the release lever 8 is pivotably attached to the support shaft 4 coaxially with the reclining arm 3. The release lever 8
A slot 17 is bored at the tip of the transmission piece 17 to form play with a slot 18 bored in the transmission piece 7, which will be described later. Further, at the base end of the release lever 8, there is a guide roller 15 that rotates a lower tooth 11, which will be described later, by operating the release lever 8.
is provided. Furthermore, the release lever 8
An elongated hole 20 is bored at the base end. A roller 21 is rotatably and slidably attached to the elongated hole 20, and the roller 21 is connected to the base by a spring 22 interposed between the roller 21 and the release lever 8. It is urged so as to be pressed against an undulating edge 23 formed at the front end of 5, and is adapted to roll along the undulating edge 23. Reference numeral 11 denotes a lower tooth (or operating plate), which is rotatably pivoted via a support shaft 12 at a position below the reclining arm 3 of the base 5, and is attached to a cover provided on the lower edge of the reclining arm 3. A tooth pattern 13 serving as a locking tooth capable of meshing with the tooth pattern 14 is formed on the upper edge of the lower tooth 11 facing the tooth pattern 14 serving as a locking tooth. The lower teeth 11 are rotated by operating the release lever 8, and the tooth patterns 13 and 1 are rotated.
4 are brought into mesh with each other or disengaged from each other. Reference numeral 16 denotes a stopper portion extending above the tip of the lower teeth 11, which contacts the guide roller 15 of the release lever 8 to prevent the release lever 8 from rotating more than necessary. This is to prevent it from falling outside the range of 11. To release the engagement, when the release lever 8 is pulled upward, a slight gap is created between the guide roller 15 and the front edge 11a of the lower tooth 11, and the pressing force of the guide roller 15 acting on the front edge 11a of the lower tooth 11 is removed. , the lower tooth 11 is lowered by its own weight to the position where the stopper part 16 contacts the guide roller 15, the tooth pattern 14 of the reclining arm 3 and the tooth pattern 13 of the lower tooth 11 are disengaged, and the reclining arm 3 is lowered by the return spring 9.
will be brought forward. The engagement is with the release lever 8.
When the lower tooth 11 is pushed down, the guide roller 15 presses the front edge 11a of the lower tooth 11 toward the support shaft 12, so that a force is applied to the front edge 11a of the lower tooth 11 to push it upward, and this action causes the reclining arm 3 to The tooth pattern 14 of the lower tooth 11 is engaged with the tooth pattern 13 of the lower tooth 11, and the reclining arm 3 is locked. Further, on the undulating edge 23 of the base 5, a first hooking portion 23' of the first stage guide surface having an arcuate shape is located approximately in the middle thereof, and a first hooking portion 23' of the second stage guide surface having an arcuate shape at the upper end thereof. Two pairs of concavities and convexities with continuous second hooking part 23'' (formed by a forwardly convex part and a concave part)
When the release lever 8 is pulled up, there are two stages of operation between the first latching part 23' and the second latching part 23''. The roller 21 is pressed against the undulating edge 23 by a spring 22.
The operation force of the release lever 8 is increased when the lever 8 fully rides the latching portions 23', 23''.
The release lever 8 is stabilized in a state where the engagement between the levers 3 and 14 is released. Note that the hooking portion 23'' of the second-stage guide surface is set at a longer distance from the support shaft 4 than the hooking portion 23' of the first-stage guide surface. A left and right interlocking shaft 6 is disposed between both bases 5 near the rear end,
Both ends of the left and right interlocking shaft 6 are connected to both bases 5.
are rotatably inserted into each. A base end of a transmission piece 7 is fitted and fixed to both ends of the left and right interlocking shaft 6. A substantially arc-shaped slot 18 is bored at the tip of the transmission piece 7. The slot 18
A slot 17 is formed in the release lever 8, and play is formed between the transmission piece 7 and the release lever 8. A pin 19 serving as a transmission member is inserted into the two slot holes 17 and 18, so that the movement of the release lever 8 is transmitted to the transmission piece 7 with play at a constant interval. Therefore, by operating one of the release levers 8, the movement of the release lever 8 moves by an amount that exceeds the fixed interval play (by operating the release lever 8 in the second step), and the transmission piece 7 and is transmitted to the other release lever 8 via the left and right interlocking shaft 6 and the like. In addition, although only the device of the seat back 2 on one side is shown in the drawing, a similar device is also provided on the other seat back 2' side, and the left and right interlocking shaft 6
They are made to interlock with each other. Next, the operation of the forward tilting device according to the present invention will be explained. First, by pulling up the release lever 8 from the position shown in FIG. 3A, the roller 21 is moved to the undulating edge 23 as shown in FIG. 3B. When it enters the hooking part 23' of the first guide surface provided, the slot 1
Due to the play between 7 and 18, the movement of the release lever 8 is not transmitted to the transmission piece 7, and the transmission piece 7 does not move. Therefore, when the release lever 8 is operated in the first step, the seat back 2 (or 2') on the operated side is moved forward because the engagement between the teeth 14 of the reclining arm 3 and the teeth 13 of the lower tooth is released. However, the other seat bag 2' (or 2) cannot be moved forward. By further lifting the release lever 8 from the above state, as shown in FIG. The transmission piece 7 rotates via a pin 19, operates the left/right interlocking shaft 6, the other transmission piece 7, and the other release lever 8 via the pin 19, and connects the teeth 14 of the other reclining arm 3 and the lower teeth. The meshing with the tooth pattern 13 is released.Thereby, both the left and right seat backs 2, 2' can be moved forward at the same time.The movement of the transmission piece 7 at each stage when the release lever 8 is operated On the other hand, the other transmission piece 7 operates as shown in Table 1 below.

[Table] Note that the other transmission piece 7 moves when the desired release lever 8 is operated in the second step, but at this time, the other release lever 8 moves in the same way as the first step, and this causes The lower tooth 11 of the reclining arm 3 is lowered by its own weight and the teeth 14 of the reclining arm 3 are lowered by its own weight.
The engagement between the lower tooth 11 and the tooth pattern 13 is released. FIG. 4 shows another embodiment in which play is provided between the transmission piece 7 and the release lever 8. A notch 24 is provided in the transmission piece 7, and the gap is used as play, and the tip of the release lever 8 is It is bent toward the transmission piece 7 side to form a bent end 8', and the bent line 8' is made to face inside the notch 24 to form a transmission member. In the above-mentioned embodiment, an example has been described in which the present invention is applied to a seat bag having a reclining mechanism, but the present invention is not limited to this, and the present invention can also be applied to a seat bag without a reclining mechanism. As described above, according to the present invention, a left-right interlocking shaft having both ends rotatably pivoted to both bases is disposed between bases fixed to both left and right sides of a seat cushion of a split seat, A transmission piece is fixed to both ends of the left-right interlocking shaft, and a transmission member is interposed between the transmission piece and the release lever, and is provided on the release lever and transmits the movement of one release lever to the other release lever. , which is connected to the transmission member and the transmission piece through a predetermined amount of play, and which is connected to the front end of the base in the vertical direction.
providing an undulating edge having two latching parts formed by a pair of concave and convex portions, and providing the release lever with a roller that rolls with the undulating edge of the base and slides the release lever in the front-rear direction; A spring is provided between the roller and the release lever to urge the roller to press against the undulating edge, and the spring and the two latching portions are used to control the release lever when the roller fully rides the latching portion. The operating force is increased so that the release lever can be operated in two stages, and when one of the release levers is operated in the first stage, the locking tooth of the lower tooth on the side of the release lever and the locked tooth of the seat back arm are engaged. The engagement is released, and further, in the second stage of operation of the release lever, the transmission member contacts the transmission piece beyond the play provided between the transmission member and the transmission piece, and rotates the transmission piece, The other transmission piece is rotated via the left-right interlocking shaft, the other release lever is rotated by the other transmission piece, and the locking tooth of the other lower tooth and the locked tooth of the other seat back arm are engaged. Since it is designed to be released, only one seat back can be moved forward by operating the first step of the release lever, and the two seat backs on the left and right can be moved forward at the same time by operating the second step of the release lever. As a result, usability has improved. Further, according to the present invention, there is no need to add the levers required to fold forward the two left and right seatbacks in addition to the levers necessary to fold forward one seatback, and the operation is extremely easy. It is something that you have.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a split seat equipped with the forward-tilting device according to the present invention, Fig. 2 is an enlarged perspective view of the main parts, and Figs. 3 A, B, and C are side views of the main parts showing the operating state of the same. FIG. 4 is an enlarged perspective view showing the play between the transmission piece and the release lever and another embodiment of the transmission member. 1 is a seat cushion, 2 and 2' are seat backs, 3 is a reclining arm, 4 is a support shaft, 5 is a base, 6 is a left and right interlocking shaft, 7 is a transmission piece, 8
is the release lever, 8' is the bent end of the release lever 8, 17 and 18 are the slots, 19 is the pin, 21 is the roller, 23 is the undulating edge, 23 and 23' are the latching parts, 2
4 is a notch.

Claims (1)

[Scope of utility model registration request] This is a split seat with two seat backs divided into left and right parts, with seat back arms fixed to the lower ends of the outer sides of the two seat backs, and the lower ends of the seat back arms attached to the bases on both the left and right sides of the seat cushion. A return spring is provided which biases the seatback arm in a forward direction, and a release lever is rotatably pivoted coaxially with the seatback arm on the left and right bases, respectively. and a lower tooth is rotatably pivoted at a position below the seatback arms of the left and right bases, and a lower edge of the seatback arm and an upper edge of the lower tooth are provided with locking teeth that can engage with each other. A locking tooth is provided, and the lower tooth is rotated by the release lever, and when the release lever is operated, the locking tooth of the lower tooth and the locked tooth of the seat back arm are engaged or engaged. In a seatback forwarding device for a split seat, which holds the seatback in a seated state when the engagement teeth of the lower teeth and the locked teeth of the seatback arm are disengaged, and moves the seatback forward when the engagement is disengaged. , a left-right interlocking shaft whose both ends are rotatably pivotally connected to the both bases is arranged between the two bases, a transmission piece is fixed to both ends of the left-right interlocking shaft, and the transmission piece and the release lever are connected to each other. A transmission member is interposed between the release lever and transmits the movement of one release lever to the other release lever, and the transmission member and the transmission piece are connected through a predetermined amount of play. and an undulating edge having two hook portions formed by two pairs of concave and convex portions that are continuous in the vertical direction is provided at the front end of the base, and
The release lever is provided with a roller that rolls on the undulating edge of the base and slides the release lever in the front and back direction, and a roller is provided between the roller and the release lever so as to press the roller against the undulating edge. The spring and the two locking portions increase the operating force of the release lever when the roller fully rides the locking portions, so that the release lever can be operated in two stages. When operating the release lever in the first step,
The locking tooth of the lower tooth on the one release lever side and the locked tooth of the seat back arm are disengaged, and furthermore, in the second stage of operation of the release lever, the locking tooth of the lower teeth on the side of the release lever is disengaged, and furthermore, in the second stage of operation of the release lever, The transmission member contacts the transmission piece beyond the play and rotates the transmission piece, rotates the other transmission piece via the left and right interlocking shaft, and the other transmission piece rotates the other release lever. 1. A seatback forward tilting device for a split seat, characterized in that the locking teeth of the other lower teeth and the locked teeth of the other seatback arm are disengaged from each other.