JPS6144683Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a seat back/seat surface adjustment device for a seat of a vehicle or the like.

Conventionally, the center of the front side of the seat back of a vehicle seat, i.e., the seat surface, is flat, so depending on the body shape of the seated person, for example, a person with a hunched back will feel a strong pressure on the shoulders, and in the case of a person with a hunched back, the back will be far from the seat surface, etc., and there has been a problem that the seat cannot fully accommodate the posture of the seated person and a good feeling of fit cannot be obtained.

Therefore, the purpose of this invention was to make it possible to obtain a better fit with a simple operation of the seating surface of the seat bag, even if the body shape of the seated person is different. The seat bag is configured so that it can be fixed in a tilted position, and the seating surface of the seat back can be adjusted.

To explain the illustrated embodiment, FIG. 1 is a perspective view showing the entire back frame equipped with this invented device, in which 1 is a main back frame, 2 is a sub-back frame, and both sides of the upper part of the main back frame 1 are shown. Both sides of the lower part of the sub-back frame 2 are rotatably supported by shaft pins 4, 4, respectively, and a tilt adjustment section is provided on the right side as viewed in FIG. The back frame 2 is tilted at an appropriate angle.

As shown in FIGS. 2 and 4, this tilt adjustment section is constructed by fixing a bent hinge 5 made of a dogleg-shaped flat plate to the lower right end of a sub-back frame 2 made of a tube material by means such as welding. At the same time, an axial hole is bored in the upper half of the bent hinge 5, and the stepped axial pin 4 is inserted and fixed therein.

Further, a shaft hole is bored in the upper right end of the main back frame 1 corresponding to the stepped shaft pin 4, and a bearing metal 9 is fixed to the shaft hole to provide a reinforced bearing hole 10. Insert the stepped shaft pin 4, and then fit the receiving bracket 11 onto the smooth shaft portion of the stepped shaft pin 4 from the outside of the main back frame 1 so that the rotation of the bearing portion is smooth. Finally, the nut 13 is screwed into the threaded portion of the stepped shaft pin 4 and tightened.

An oblong hole 6 is bored at the tip of this hinge 5, and a support pin 8 is formed on the side of the tip of a lock plate 7 extending from a locking mechanism, which will be described later.
is protruded and slidably faces into the oblong hole 6 to connect the two, and in conjunction with the expansion and contraction movement of the lock plate 7, the sub-back frame 2 rotates around the shaft pin 4. Configure it as follows.

Details of the lock mechanism are shown in FIGS. 3 to 5, and 14 is a holder for the lock plate 7.

This holder 14 is made of a rectangular cylindrical body made of metal or the like, and has an opening 15 formed in a substantially parallelogram shape opening in the direction in which the lock plate 7 extends, in the flat surface of the front surface thereof, and extending as required in the longitudinal direction of the upper surface. It is formed by fixing a support part 17 having a plurality of rectangular locking holes 16 drilled at intervals, and a wide flat plate part 18 extending from both upper and lower sides to the back surface of the support part 17 made of a rectangular cylindrical body. be done. Then, the flat plate part 18 of this holder is brought into contact with the upper inner part of the main back frame 1, and both sides thereof are screwed or welded by means such as welding, and the holder 1 is attached to the main back frame 1.
Make sure to fix 4.

Further, the lock plate 7 is a substantially rectangular plate with a pin hole 7a bored at its tip and a support pin 8 inserted into the oblong hole 6 of the folded hinge 5 as described above. Fit and secure.

The upper and lower long sides of the lock plate 7 are provided with guide side parts 19, 19 bent in left and right directions, respectively, which slide in contact with the inner upper and lower inner surfaces of the support part 17 of the holder 14 mentioned above. So,
This lock plate 7 is guided so that it does not rattle within the holder.

At the rear end of this lock plate 7 is a holder 1.
A locking mechanism that is engaged with the locking hole 116 of No. 4 is attached.

In FIG. 5 showing the members of this locking mechanism, reference numeral 20 is a stopper piece, and the tip thereof has a front edge side portion 4 having an arcuate curve so as to smoothly abut the end of the locking hole 16.
0a, and a rear edge side portion 40b of a linear oblique side with an opposite slope to the rear so that it can be easily locked to the end of the locking hole 16.
A locking groove 21 is cut out and formed below the rear edge side portion 40b, and a front edge side portion 40b is formed by cutting out a locking groove 21.
A contact piece 22 bent in the horizontal direction is provided below a, and a shaft hole 23 and a spring locking hole 24 are bored in the rear end. Correspondingly, a shaft hole 25 and a spring locking hole 26 are also drilled at the rear end of the lock plate 7, and a shaft pin 28 is inserted into the shaft hole 25 and into the cylinder of the torsion coil spring 27 from the outside of the lock plate 7. and the shaft hole 23 of the stopper piece,
The head of the shaft pin 28 in the shaft hole 23 of the stopper piece is fixed by caulking or the like. Also, one end of the torsion coil spring 27 is inserted into the spring locking hole 26 of the lock plate 7, and the other end is inserted into the stopper piece 20.
It is inserted into the spring locking hole 24 of the spring locking hole 24 and is tensioned, and the stopper piece 20 is pivotally supported in such a state that it is always biased upward as shown by the arrow A in FIG.

Additionally, a small shaft hole 32 and a small spring locking hole 33 are drilled in a position adjacent to the stopper piece 20 of the lock plate 7, a small shaft pin 34 is inserted into these holes, and a cylindrical portion of a small torsion coil spring 35 is inserted therein. Insert. A holding piece 29 as a holding mechanism that locks onto this small shaft pin 34
Attach the shaft. This holding piece 29 has a tip bent into a hook shape, a plate contact piece 31 projecting horizontally at the rear end, and a small shaft pin 34 fitted into a shaft hole 30 drilled in the middle part, for caulking, etc. Attach by means of. At the same time, one end of the small torsion coil spring 35 is locked in the small spring locking hole of the lock plate 7, and the other end is connected to the holding piece 29.
It locks into the small spring locking hole 36 drilled in the holding piece 2.
9 is always biased in the direction shown by arrow A in FIG.
1. Furthermore, stopper piece 2
0 rotates downward, the tip 37 of the holding piece fits into the locking groove 21 of the stopper piece to lock it and hold it in that position. The lock plate 7 having the above-described structure is inserted into the rectangular cylindrical support portion 17 of the holder 14 from the end portion provided with the locking mechanism. At this time, the contact piece 22 of the stopper piece 20 and the plate contact piece 31 of the holding piece 29 are introduced from the open end so as to come into contact with the opening 15 of the holder.

As shown in FIG. 3, the stopper piece 20 introduced into the holder 14 is moved from the locking hole 16 to the locking portion 40 at an appropriate position by the elasticity of the torsion coil spring 27 acting in the direction of arrow A. When the lock plate 7 is protruded and pulled in the direction of arrow C, the stopper piece 20 is pushed in the direction of arrow A, but this force is stopped and locked due to the relationship between the shaft pin 28 and the position of the engaging part 40. Conversely, when a force is applied in the direction of arrow D, the stopper piece 20 slips on the front edge side 40a of the engagement portion and rotates in the direction of arrow B, causing the engagement portion 40 to disengage from the engagement hole 16 and disengage the support portion 17. It slides in contact with the upper inner surface, and is locked in the next locking hole 16 by rotational bias of the stopper piece 20.

In this way, when the lock plate 7 is pulled in the direction of the arrow D and the stopper piece 20 moves to the position E shown by the dashed line at the leftmost end in FIG. to rotate the stopper piece 20 in the direction of arrow F. This stopper piece 20 is rotated, and the tip of the holding piece 29 is locked in the locking groove 21, so that the stopper piece 20 is held in a downwardly rotated state. Therefore, the stopper piece 20 is released from the locking hole 16, so that the lock plate 7 can be slid in the direction of arrow C. Next, when it is pulled out to the rightmost end, the plate contact piece 31 of the holding piece comes into contact with the lower right oblique side 15b of the opening 15, and by rotating it, the tip of the holding piece 29 is attached to the locking groove 2.
Dissociate from 1. Then, this stopper piece 20 is rotated in the direction of arrow A by the elasticity of the torsion coil spring 27. Thereafter, by sliding the lock plate 7 to an appropriate position, the locking portion 40 of the stopper piece is fitted into the locking hole 16 again and locked. In this way, the opening 15 adjacent to the unlocking and holding mechanism
is the opening end oblique side 15a and the lower right end oblique side 1
5b, the locking mechanism is indirectly controlled to lock in only one direction at required intervals.

Next, we will explain how to use this invented device.

For example, when the sub-frame 2 is at the angle shown by A in FIG. 2, if you want the upper seating surface of the seat back to be slightly bent forward, tilt the upper part of the seat back forward with your hand and the stopper piece 20 will move to the first position.
It is moved to the locking hole 16 one step later and locked, and becomes the position shown by the two-dot chain line B in FIG. 2, thereby realizing the seat surface.

Next, when you want to place the upper seat surface of this seat bag in a position where it is curved backwards, tilt the upper part of this seat bag forward to the frontmost part of the tilting range by hand, and the stopper piece 20 will be locked by the holding piece 29 and the upper part of the seat bag can now rotate freely. Therefore, when the upper part of the seat back is tilted backward to the end of the tilting range, the holding piece 29 is separated from the stopper piece 20, so when the seat back is rotated slightly forward by hand again, it is placed at the position shown by the three-dot chain line C in the figure. The stopper piece fits into the locking hole 16 and locks in this position,
It is possible to realize a seat back surface in which the upper seat surface is curved backwards.

Also, returning the upper part of the seat back from position C to position A can be achieved by simply pushing it forward.

Although it is not possible to go back or forth with the series of operations described above, by repeating this operation, the desired seat back surface can be adjusted, and there is no need for a switch to adjust the seat back, and it is semi-automatic. Seat adjustment operations can be repeated.

As described in detail above, according to the seat surface adjustment device of this invention, the upper seat of the seat back can be adjusted by simply applying force directly to the upper part of the seat back and tilting it, without requiring any operation of the operating member. The shape of the surface can be adjusted semi-automatically according to the body shape or preference of the person sitting on the seat, thereby achieving the desired comfortable sitting posture of the person on the seat. Further, in the device of the present invention, since the locking device consisting of a holder, a locking plate, etc. is arranged on the side of the seat back frame, there is no fear of giving the seated person any feeling of a foreign body.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the entire back frame equipped with this invented device, Fig. 2 is an enlarged side view taken along lines from Fig. 1, and Fig. 3 is an enlarged view of the holder of this invented device. 4 is an enlarged exploded perspective view showing the components of the device shown in FIG. 2, and FIG. 5 is a view of the locking mechanism installed in the lock plate built into the holder shown in FIG. It is an enlarged exploded perspective view showing parts. In the figure, 1 is a main back frame, 2 is a sub-back frame, 5 is a hinge, 7 is a lock plate, and 14 is a holder.

Claims (1)

[Claims for Utility Model Registration] A sub-back frame constituting the upper seating surface of the seat bag is rotatably supported on the upper part of a main back frame constituting the back frame of the seat bag, and at least one side of the back frame has the above-mentioned structure. A rectangular cylindrical body is formed in the frame side of either the main back frame or the above-mentioned sub-back frame, and an opening is formed in a substantially parallelogram shape on the surface side plane, and a longitudinal opening is formed in either the upper or lower surface. A holder having a plurality of locking holes drilled at required intervals in the direction is fixed, and a lock plate that is slidably inserted into the holder is engaged with the other frame side, and the lock plate has one side. A stopper piece has a notch-shaped locking groove formed on its edge and a contact piece provided on the other side edge, a hook-shaped engaging part that is engaged with the locking groove at one end, and the other end. A holding piece having a plate contact piece provided on the holder is pivoted facing each other, and the stopper piece is elastically biased to rotate so as to engage with the locking hole of the holder in only one direction, and the holding piece The engaging part is elastically biased to rotate so as to come into contact with one side edge of the stopper piece, and the holder and the lock plate are slidable with respect to each other, and the lock plate is slidable against the tilting movement of the sub-back frame. The stopper pieces are sequentially engaged with the locking holes of the holder during the contraction sliding, and the holder and the lock plate are locked in the extension sliding direction, and the final contraction sliding occurs. In this state, the contact piece of the stopper piece contacts the inner edge of the opening of the holder, rotates in an inverted position, and separates from the locking hole, and the engaging portion of the holding piece engages with the locking groove. The holder and the lock plate are able to slide freely, and in the final extended sliding state, the plate contact piece of the holding piece is in contact with the outer edge of the opening of the holder. When the engaging portion is rotated and the engaging portion is disengaged from the locking groove of the stopper piece and the stopper piece is again engaged with the locking hole of the holder, the sub-claim is satisfied. A seat back adjustment device for a seat back of a vehicle, etc., characterized in that the main back frame can be tilted and adjusted.