JPH0457327B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a seat hinge structure, and includes, for example, a folded state in which the seat back is stacked on the seat bottom from its upright state, and a fully flat state in which it is placed behind the seat bottom. The present invention relates to a seat hinge structure that can be suitably applied to a rear seat of a van-type vehicle, etc., which can be switched between two positions.

(Prior art) Conventionally, in the rear seat of a van-type vehicle, by folding the seat back forward from its upright position, it can be brought into a folded state where it overlaps the seat bottom, and conversely, by folding it backward, it can be folded to a position behind the seat bottom. There are various known devices capable of creating a continuous full flat state, as disclosed in, for example, Japanese Unexamined Utility Model Publication No. 60-93527.
In the hinge structure of the seat back, the pivot axis when folding forward and the pivot axis when folding backward must be different, and the lock can be released by operating a separate control lever for each. It is configured so that it can be tilted forward or backward.

A specific example will be explained with reference to FIG.
An intermediate rotating member 23 is pivotally supported through the intermediate rotating member 23, and a support member 25 of a seat bag (not shown) is pivotally supported on this intermediate rotating member 23 via a pivot shaft 24.
A first lock pawl 26 that is rotatable about the pivot shaft 24 is attached to the intermediate rotating member 23, and its engaging portion 26a engages with an engaging recess 27 formed in the fixed member 21. The first operation lever 26b is connected upwardly from the first lock pawl 26.
has been extended. Further, the support member 25 has a second lock pawl 2 that is rotatable around the pivot pin 25a.
8 is attached, its engaging portion 28a is engaged with the engaging recess 29 formed in the intermediate rotating member 23, and the second operating lever 28b is upwardly extended from the second lock pawl 28. It has been extended. Then, when the first operating lever 26b is rotated backward against the biasing force of the spring 26c, the first lock pawl 26
is disengaged, the intermediate rotation member 23 rotates rearward around the pivot shaft 22 together with the support member 25, the seat back becomes fully flat with the seat bottom, and the second operating lever 28b is moved by the spring 28c.
When it rotates forward against the urging force of It is configured to be in the same state.

(Problems to be Solved by the Invention) By the way, in the above configuration, the first operating lever 26b that tilts the seat back backward and the second operating lever 28b that tilts the seat bag forward are separately provided. There were problems in that it was necessary to select which one to use, which made the operation complicated, and the operating space for each control lever was small. Further, when the seat bag is folded forward, the first operating lever 26b remains in an upright position and protrudes, which is unsightly and potentially dangerous.

In view of the above-mentioned conventional problems, the present invention has been proposed to provide a seat bag that can be tilted forward or backward around different pivot axes by operating a single operation lever, is compact, has a simple structure, and has high precision. The purpose is to provide a good seat hinge structure.

(Means for Solving the Problems) In order to achieve the above object, the present invention connects the intermediate rotating member 3 to the fixed member 1 coupled to the seat bottom 19 with the lower pivot shaft 2 at the lower part thereof. At the same time, the indicating member 5 of the seat bag 18 is pivotally supported at the lower part of the upper part of the intermediate rotating member 3 by the upper pivot shaft 4. A first lock pawl 6 that locks the moving member 3 in an upright position and releases the lock by rotating the seat back 18 in the backward direction is pivoted to the upper part of the intermediate rotating member 3 by the upper pivot shaft 4. On the other hand, a second lock pawl 10 is provided between the intermediate rotation member 3 and the support member 5, which locks the support member 5 in the upright position and releases the lock by rotating the seat back 18 forward. The lever 13 is pivoted to the support member 5 by a pivot pin 9 provided therein, and the operating lever 13 is rotatably pivoted to the upper pivot shaft 4 at its lower end. 6, an engaging portion 14 is provided between the operating lever 13 and the seat back 18 to engage the two when the operating lever 13 rotates from the upright position to the rearward direction of the seat back 18, thereby rotating the first lock pawl 6 in the same direction. When the operating lever 13 rotates the seat bag 18 forward from the upright position, the operating lever 13 and the second lock pawl 10 are engaged with each other to rotate the second lock pawl 10 in the same direction. It is characterized by providing engaging portions 10b and 15 that allow the

(Function) Since the present invention has the above configuration, when the operating lever is rotated forward, for example, the second lock pawl rotates, and the second lock pawl between the rotary member and the support member locks. is released, the support member rotates forward together with the seat back, and the seat back overlaps the seat bottom. When the operating lever is rotated backwards, the first lock pawl rotates and locks the seat. The lock by the first lock pawl between the member and the intermediate rotating member is released, and the intermediate rotating member rotates rearward together with the support member and the seat back,
The seat back is in a fully flat state extending behind the seat bottom. Therefore, by operating the operating lever, the seat back can be tilted back and forth around different pivot axes, and furthermore, when operating the operating lever in any direction, it rotates together with the support member and remains in an upright position. There is no such thing.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4.

In FIGS. 1 and 2, reference numeral 1 designates a fixed member that is connected to a seat bottom (not shown) and fixedly supported by the vehicle body, and an intermediate rotating member 3 rotates via a lower pivot shaft 2. It is freely supported.
Further, a lower end portion of a support member 5 of a seat bag (not shown) is pivotally supported on the upper part of the intermediate rotating member 3 via an upper pivot shaft 4. A first lock claw 6 rotatable around the upper pivot shaft 4 is attached to the intermediate rotating member 3, and the engaging portion 6a thereof
is engaged with an engagement recess 7 formed in the fixing member 1, and this first lock pawl 6 is engaged with a spring 8.
It is always energized towards the locked state.
Further, a second lock pawl 10 is attached to the support member 5 so as to be rotatable around the pivot pin 9, and an engaging portion 10a of the second lock pawl 10 is fitted into an engaging recess 11 formed in the intermediate rotating member 3. The second lock pawl 10 is always urged toward the locked state by a spring 12. The first lock pawl 6 and the second lock pawl 10 are configured to be unlocked by rotating in opposite directions, and in the illustrated example, the first lock pawl 6 and the second lock pawl 10 are 6 is configured such that its lock is released when it is rotated clockwise, and its lock is released when the second lock pawl 10 is rotated counterclockwise.
A lower end portion of the operating lever 13 is rotatably supported by an upper pivot shaft 4 that pivotally supports the intermediate rotating member 3 and the support member 5. An engaging piece 14 formed protruding from the first lock pawl 6 engages with this operating lever 13, and an engaging pin 15 protruding from this operating lever 13 engages with the second lock pawl 10.
When the operating lever 13 is turned backward and rotated clockwise, the first lock pawl 6 is also rotated clockwise, and vice versa. The second lock pawl 10 is also rotated counterclockwise when the lock is rotated counterclockwise. A cover 16 is fixed to the support member 5, as shown by imaginary lines in FIG. The rotation range is restricted, and when the operating lever 13 is rotated,
The structure is such that the support member 5 can be rotated directly after the lock is released in the first stroke.

In the above configuration, the operating lever 13 is
When facing forward and rotating counterclockwise as shown by arrow A in the figure, the second lock pawl 10 is rotated counterclockwise through the engagement pin 15 against the biasing force of the spring 12. Then, the intermediate rotation member 3 is disengaged from the engagement recess 11, and the support member 5 is unlocked. When the operating lever 13 is further rotated,
The operating lever 13 engages with a cover 16 fixed to the support member 5 to rotate the support member 5, and as shown in FIG. 3, the seat back 18 rotates around the upper pivot shaft 4 and the seat It is in a folded state where it overlaps the bottom 19. During this operation, the engaging piece 14 of the first locking pawl 6 does not engage with the operating lever 13, so the first locking pawl 6 maintains the state of being engaged with the engaging recess 7 of the fixing member 1, and The rotating member 3 remains locked and maintained in an upright position. Next, when the operating lever 13 is rotated in the direction of arrow C in FIG. The seat bag 18 is engaged and locked in the engagement recess 11 of the intermediate rotation member 3, and the seat bag 18 is again locked in the upright state.

Next, when the operating lever 13 is rotated clockwise toward the rear as shown by arrow B in FIG.
The operating lever 13 rotates the first locking pawl 6 clockwise via the engaging piece 14 formed on the first locking pawl 6, so that the first locking pawl 6 engages with the engaging recess 7 formed on the fixing member 1. The lock of the intermediate rotation member 3 is released. Furthermore, when the operating lever 13 is rotated, the operating lever 13 engages with the cover 16, and the support member 5 is rotated together with the intermediate rotating member 3, so that the seat back 18 is moved from the lower pivot point as shown in FIG. It rotates around the shaft 2 and reaches a fully flat state where it is connected to the seat bottom 19. Next, when the operating lever 13 is rotated in the direction of arrow D in FIG. It is engaged with the engagement recess 7 of the fixing member 1 with a biasing force of 8 and locked.

The present invention is not limited to the above-mentioned embodiments, and, for example, the shapes and pivot positions of the first and second lock claws, the shape and arrangement position of the engaging portion, etc. can be arbitrarily designed within the range that allows the above-mentioned operation to be achieved. Can be changed.

(Effects of the Invention) According to the seat hinge structure of the present invention, as described above, when the operating lever is rotated in either direction, the first or second lock pawl rotates and engages the fixing member. Since the lock between the intermediate rotating members or between the intermediate rotating member and the supporting member is released, the intermediate rotating member rotates rearward together with the supporting member and the seat back, and the seat back is connected to the rear of the seat bottom. A fully flat state or a state in which the support member rotates forward together with the seat bag so that the seat bag overlaps the seat bottom can be achieved. Therefore, the seat back can be tilted forward or backward by operating one operating lever, simplifying the operating method, and since there is only one operating lever, the space for operating the lever is also expanded compared to conventional models. , easy to operate. Furthermore, when operating the operating lever in any direction, it rotates together with the supporting member, and does not remain in an upright position and become a hindrance.

Further, according to the present invention, a support member for a seat bag,
The operating lever and the first lock pawl are connected to the intermediate rotating member 3.
Since it is configured to pivot on the same shaft (upper pivot shaft) that is supported by the As a result, the hinge structure of the seat can be made more compact.

Further, according to the present invention, the operating lever is pivotally supported by the intermediate rotating member, and the first lock pawl is disposed between the intermediate rotating member and the fixed member and locks and unlocks both. The operating lever is configured to engage with a second lock pawl that is disposed between the intermediate rotating member and the support member and locks and unlocks both. Therefore, the engagement position between the operating lever and the first and second lock pawls can be brought closer to the pivot shaft (upper pivot shaft) of the operating lever, and as a result, the rotation of the operating lever can be adjusted to the first and second locking claws. It is possible to smoothly transmit the information to the second lock pawl, and also from this point of view, the hinge structure of the seat can be made more compact.
Furthermore, since the operating lever and the first lock pawl are pivotally supported by the intermediate rotating member via the same shaft (upper pivot shaft), their mutual positional relationship can be determined with high precision.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Figs. 3 and 4 are side views showing the same operating state, and Fig. 5 is a perspective view of a conventional example. . DESCRIPTION OF SYMBOLS 1... Fixed member, 2... Lower pivot shaft, 3... Intermediate rotation member, 4... Upper pivot shaft, 5... Support member, 6... First lock claw, 10... Second 13...operation lever, 14...engaging piece (engaging portion), 15...engaging pin (engaging portion).

Claims (1)

[Claims] 1. The intermediate rotation member 3 is pivoted at the lower part of the fixed member 1 connected to the seat bottom 19 by the lower pivot shaft 2, and the support member 5 of the seat back 18 is supported on the upper part of the intermediate rotation member 3. is pivoted at its lower part by an upper pivot shaft 4, and the intermediate rotating member 3 is locked in an upright position between the fixed member 1 and the intermediate rotating member 3, and the seat back 18 is rotated in the backward direction. The first lock pawl 6 for releasing the lock is pivotally supported on the upper part of the intermediate rotating member 3 by the upper pivot shaft 4, while the intermediate rotating member 3 and the supporting member 5
During this time, the support member 5 is fixed by a pivot pin 9 provided with a second lock pawl 10 on the support member 5, which locks the support member 5 in the upright position and releases the lock by rotating the seat back 18 forward and backward. The operating lever 13 is rotatably supported on the upper pivot shaft 4 at its lower end, and the operating lever 13 stands up between the operating lever 13 and the first lock pawl 6. When the seat back 18 is rotated backward from the position, the first lock claw 6 is engaged with the seat back 18 in the same direction.
An engaging portion 14 is provided between the operating lever 13 and the second lock pawl 10 to engage the operating lever 13 and the second lock claw 10 when the operating lever 13 rotates the seat back 18 forward from the upright position. Engagement portions 10b, 1 that rotate the second lock pawl 10 in the same direction
A seat hinge structure characterized by providing a seat hinge structure.