JPH068063U - Seat back structure for automobile seats - Google Patents

Abstract

(57) [Summary] [Purpose] A retractable table is attached to the back of the seat back of a vehicle seat, and the pulled-out table is securely locked. In a vehicle seat S in which a seat back S1 is foldably connected to a seat bottom S2, a recess S8 having a depressed central portion is formed on the back surface of the seat back S1 in a state where edges are formed around the seat back S1. This recess S8
Table board 2 that can be freely retracted and retracted via link mechanism 3a
The table board 2 is provided with locking means for locking the table board 2 pulled out from the recess. The locking means is rotatably supported on the seat back S1 about a horizontal axis and includes a plurality of locking means. Lock plate 4 having locking groove 41
And the locking groove 41 provided in the link mechanism 3a.
Corresponding to the lock pin 32a, and this lock pin 32a
And a biasing means for biasing the lock plate 4 so that the locking groove 41 is engaged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to an automobile seat capable of retracting a table.

[0002]

[Prior art]

 If you travel a long distance in a car, you may write in the car, enjoy playing games such as playing cards, or have a meal. Therefore, some large cars such as sightseeing buses have built-in tables for eating and drinking from the beginning. However, it is difficult to secure a space for a table to be built in a small car such as an ordinary small passenger car. Therefore, it can be said that there was no commercial small-scale automobile with a table in the room, which was remodeled for personal taste.

[0003]

[Problems to be solved by the device]

 However, there are many requests from passengers to write, play, eat, drink, etc. while the vehicle is on board.In such a case, it was normal to use the table without a table. Writing, playing, or drinking without support for putting on is very inconvenient, and especially when eating and drinking, there are many cases where food is spilled, which causes the inconvenience of contaminating clothes and the room.

[0006] Therefore, attention is particularly focused on the seat back that is stored by folding the seat back on the seat bottom. A folding table is attached to the back of the seat back so that the seat back can be retracted. It is conceivable to store it in the bag and take it out when needed.

However, in such a foldable table, when the table is pulled out from the back surface of the seat back and set, various items are placed on the placing surface of the table board. At least the pulled-out tableboard must be securely locked to keep it in order to prevent it from falling. In addition, it is desired that the mechanism for the locking is simple and the locking operation is simple.

The present invention has been made to solve the above problems, and has a simple structure, is easy to operate, and reliably locks a pulled-out table. It is an object of the present invention to provide a seat back structure for automobile seats provided with a freely retractable table.

[0007]

[Means for Solving the Problems]

 The seat back structure for an automobile seat according to claim 1 of the present invention is an automobile seat in which the seat back is foldably connected to a seat bottom, and a rear edge of the seat back is formed with an edge portion. A recessed part is formed in which the central part is depressed, and a table board is provided in this recessed part via a link mechanism so that the table board can be retracted and a locking means for locking the table board pulled out from the recessed part is provided. The locking means is rotatably supported on the seat back about a horizontal axis and has a lock plate having a plurality of locking grooves; a lock pin provided in the link mechanism and corresponding to the locking grooves; It is characterized in that it comprises an urging means for urging the lock plate so that the lock pin and the locking groove are engaged with each other.

According to a second aspect of the present invention, there is provided an automobile seat seat back structure according to the first aspect of the present invention, wherein the seat back structure is for releasing the locking by the locking means. A feature is that stop release means is provided.

[0009]

According to the seat back structure for an automobile seat according to the first aspect of the invention, the locking means for locking the state in which the table board is pulled out from the recess is rotated around the horizontal axis in the seat back. A lock plate that is freely rotatably supported and has a plurality of locking grooves, a lock pin that is provided in the link mechanism and that corresponds to the locking groove, and that the locking pin engages with the locking groove. Since it is composed of urging means for urging the lock plate, when the table board is pulled out from the back surface of the seat back, the link mechanism moves against the urging means to pull out the table board. When stopped, the lock pin provided on the link mechanism fits into one of the locking grooves provided on the lock plate and is locked, and the tableboard is kept pulled out. To be done.

To store the once pulled out table board, a force larger than the urging force of the urging means may be applied in the table board storing direction. By doing so, the lock plate is rotated about the horizontal axis to release the locking, and the movement of the link mechanism allows the table board to be stored in the seat back.

According to the seat back structure of the automobile seat of the second aspect, since the seat back is provided with the unlocking means for unlocking the locking means, the table once pulled out. The table board can be easily accommodated in the seat back by operating the lock releasing means without releasing a large force against the urging means on the board to release the lock.

[0012]

【Example】

 FIG. 1 is a perspective view showing an example of a seat back structure of an automobile seat according to the present invention, and is a partially enlarged perspective view thereof. First, in FIG. 1, as the seat S, a flip-up type separate seat arranged in the central row of the three rows of seats of a wagon type automobile is illustrated. The present invention is not limited to such a separate seat, but can be applied to a passenger seat and a rear seat in terms of location, and can also be applied to a bench seat in terms of form.

As shown in the figure, the seat S is composed of a seat bottom S2 as a seat and a seat back S1 as a backrest. A front leg S3 and a rear leg S5 are provided at the bottom of the seat bottom S2, and the front leg S3 is pivotally supported by a horizontal axis S41 of a bracket S4 fixedly mounted on the floor F, and the seat bottom S2 is coaxially rotated. It can be turned to and flipped up in the direction of travel of the car.

A pair of L-shaped brackets S6 are provided on both sides of the rear of the seat bottom S2, and support shafts S7 are provided on side pieces protruding above the brackets S6. The base end portion of the seat back S1 is pivotally supported by the support shaft S7, and from the position where the seat back S1 is folded over the seat bottom S2 to the position where the seat back S1 stands upright on the rear portion of the seat bottom S2 as a backrest. Thus, it is rotatable about the support shaft S7.

On the back surface of the seat back S1, there is provided a recess S8 whose central portion is recessed while leaving a slight edge around the periphery, and the recess S8 corresponds to the recessed shape and is accommodated. The frame body 1 in which the space 1'is provided is fitted. The frame 1 is located on the bottom plate 11 conforming to the shape of the bottom of the recess S8, the side wall 12, and the upper part of the side wall 12, and is projected outward so as to correspond to the edge of the recess S8. The projecting portion 13 is provided with a projecting portion 13, and a step portion 14 is provided between the side wall 12 and the projecting portion 13 so as to surround the inner wall surface of the storage space 1 ′ of the frame body 1.

In the seat back structure for a vehicle seat of the present invention, the table board 2 is provided so as to be retractable in the storage space 1'of the frame 1 attached to the seat back S1 as described above. . The size of the table board 2 is the size of the opening of the storage space 1 ′ of the frame body 1. When the table board 2 is fitted into the storage space 1 ′, the peripheral edge of the table board 2 is inside the storage space 1 ′. It is locked to the step portion 14 formed on the wall surface and is prevented from falling down to the bottom plate 11 of the frame body 1.

A pair of crosspieces 21 are provided in the front-rear direction on both sides of the back surface of the tableboard 2 in the vehicle width direction, and a long hole 21a for guide is provided on the base end side of the crosspiece 21. It is provided. Then, the cross rod 3 including the first rod 31 and the second rod 32 that constitute the link mechanism 3a is attached to the crosspiece 21. That is, the shaft 36 provided at the upper end of the first rod 31 is slidably fitted in the elongated hole 21a of the crosspiece 21, and the upper end of the second rod 32 is rotated by the shaft 34 to the crosspiece 21. Possibly attached, the first rod 31 and the second rod 32 are rotatably connected to each other by a shaft 33 at approximately the center thereof.

The lower end of the first rod 31 is attached to both side surfaces of the storage space 1 ′ in the vehicle width direction by a shaft 35, and the first rod 31 is rotatable around the shaft 35. On the other hand, the lower end of the second rod 32 is provided with a cylindrical lock pin 32a protruding outward, and the lock pin 32a fits into a locking groove 41 of the lock plate 4 described later. Is dimensioned as.

On the other hand, at the lower part of the side wall 12 in the storage space 1 ′, a U-shaped rock plate 4 as shown in FIG. 2 is provided with the same shaft as the lower end part of the first rod 31 is pivotally supported. 35 is supported at both tips. A plurality of arcuate locking grooves 41 that open upward are provided in the upper edge portion of the lock plate 4 near the base end, and the U-shaped central portion has an outwardly protruding convex portion. A piece 42 is provided.

In this embodiment, as shown in FIG. 3, the locking groove 41 has a shape of a wave front 41a in which a gentle slope is formed on the left side and an overhanging cliff 41b is formed on the right side. Presents. As shown in FIG. 4, the edge of the stepped portion 14 formed in the storage space 1'of the frame 1 forms a protruding edge 14a protruding in the direction of the storage space 1 '. Is dimensioned so that the lock pin 32a is located at the bottom of the. Therefore, the lock pin 32a fitted in the locking groove 41 is blocked by the cliff of the locking groove 41 and cannot move to the right in FIG. 3, but to the left in FIG. Is in a state in which the lock plate 4 can be rotated to the left by rotating the lock plate 4 around the shaft 35 in the clockwise direction along a smooth slope and while the upward movement is restricted by the protruding edge 14a.

The lock pin 32 a is provided with a roller 32 b in contact with the second rod 32. A rail 11a is provided at a portion of the bottom plate 11 of the frame body 1 corresponding to the lower part of the roller 32b, and the bottom plate 11 is provided with the rail 11a in a state of being raised in the front-rear direction. At times, the roller 32b rolls on the rail 11a. In the present embodiment, only one roller 32b is provided on the side portion of the second rod 32, but a similar roller is provided on the side portion of the first rod 31, and the first rod 31 is formed by two rollers. The second rod 32 and the second rod 32 may be held between them.

Further, a torsion bar 5 as a biasing means is provided on the lower portion of the central portion of the lock plate 4 outwardly of the lock plate 4 in the vehicle width direction. A U-shaped embedded piece 51 protruding downward is provided at the center of the torsion bar 5, and the lower portion of the embedded piece 51 is embedded and fixed to the bottom plate 11 of the frame 1. Both sides of the torsion bar 5 in the vehicle width direction are bent in the direction of the lock plate 4, and the leading end of the torsion bar 5 rests on the lower edge of the lock plate 4, and the lock plate 4 rotates counterclockwise around the shaft 35. It is biased to rotate.

The torsion bar 5 as the urging means, the lock plate 4 rotatably supported by the seat back S1 around the shaft 35 and having a plurality of locking grooves, and the link mechanism 3a. The locking means according to the present invention is formed by the lock pin 32a provided at the lower end of the second rod 32 and fitted in the locking groove 41.

On the other hand, on the base end side of the seat back S1, there is provided a knob 6 which is pivotally supported around a horizontal shaft 61 supported by an inner wall portion of the frame body 1. A contact claw 62 protruding downward is provided at one end of the knob 6, and the contact claw 62 is in contact with the convex piece 42 of the lock plate 4. An operating portion 63 for operating with a finger is provided at the other end of the knob 6, and the operating portion 63 is exposed to the outside at the base end portion of the seat back S1, as shown in FIG. Has been Therefore, when the operating portion 63 is pushed upward with a finger, the knob 6 is rotated counterclockwise around the horizontal axis 61, and the abutting claw 62 at the tip thereof pushes down the convex piece 42, and the lock plate 4 is moved. Rotates clockwise about the shaft 35, and the engagement of the locking groove 41 with the lock pin 32a is released. The knob 6 and the protruding piece 42 of the lock plate 4 constitute the unlocking means of the present invention.

It should be noted that the present invention is not limited to the formation of the cliff 41b as described above in the locking groove 41 as in this embodiment, and the locking groove 41 can be loose in any direction. You may make it form a different inclination. By doing so, the lock pin 32a can be moved in either the front or back direction, and by applying a considerable downward force to the table board 2 that has been pulled out, the lock pin 32a rides on the wave front 41a of the locking groove 41. The lock pin 32a can be moved to the right when the lock plate 4 is pushed down over the lock plate 4, and as a result, the table board 2 is stored in the storage space 1'even when the knob 6 is not provided. can do.

A recess 16 having a semicircular shape in plan view is provided at the center of the left overhang 13 of the frame 1 so as to cover the step 14, and corresponds to the recess 16 of the table board 2. A similar depression 22 is also provided at the open position. The recess 16 of the frame 1 is provided with a rod-shaped locking piece 16a that is rotatably supported around a vertical axis. When the table board 2 is stored in the storage space 1 ′ of the frame body 1, the rod-shaped locking piece 16 a is turned to position the side portion of the table board 2 in the recess 22 of the table board 2. 2 is in a state where it is prevented from jumping out of the storage space 1 '.

The operation of the present invention will be described below. First, although not shown, in the state where the table board 2 is stored in the storage space 1 ′ of the seat back S1, the table board 2 has a peripheral edge portion provided on the projecting portion 13 of the frame body 1. The cross rod 3 is placed on the portion 14, and the cross rod 3 is housed in the space below the portion 14. Then, the locking piece 16a in the recessed portion 16 provided in the overhanging portion 13 of the frame body 1 is rotated around the vertical axis so that the side portion of the locking piece 16a is caught in the recessed portion 22 of the table board 2. Therefore, the table board 2 is prevented from protruding from the storage space 1 '.

From the state in which the table board 2 as described above is housed in the frame body 1 on the back surface of the seat back S1, the locking piece 16a is rotated to release the locking with respect to the table board 2. When 2 is pulled out from the frame 1, since the first rod 31 and the second rod 32 are linked by the shaft 33, the first rod 31 rotates in the counterclockwise direction around the shaft 35 to rotate the shaft at the tip thereof. 36 slides in the long hole 21a of the crosspiece 21, the second rod 32 rotates clockwise around the shaft 34, and the lock pin 32a at its tip is prevented from moving upward by the protruding edge 14a. While moving to the left, this movement pushes the wave front 41a of the lock plate 4 downward as shown by the chain double-dashed line in FIG. 3, so that the lock plate 4 rotates clockwise around the shaft 35. Move and fall downwards, The lock pin 32a moves to the left so as to get over the wave front 41a.

Then, when the table board 2 is pulled out to a predetermined height and the pulling out operation is interrupted, the lock pin 32a is engaged with the locking groove 41 at that position, and the table board 2 is pulled up to a predetermined height. Locked and held. In this state, even if a large force is applied to the mounting surface of the table board 2, the lock pin 32a is blocked by the cliff 41b of the locking groove 41 of the lock plate 4 and cannot move to the right. , The table board 2 never descends.

When the table board 2 once pulled out is stored, the operating portion 63 of the knob 6 provided at the base end portion of the seat back S1 is pushed upward by a finger. Then, the knob 6 rotates counterclockwise around the horizontal shaft 61, and the contact claw 62 provided at the tip of the knob 6 presses the convex piece 42 of the lock plate 4 downward, so that the lock plate 4 rotates around the shaft 35. When the lock pin 32a is unlocked by the locking groove 41 by rotating clockwise, the lock pin 32a can move to the right, and as a result, the cross rod 3 performs a link motion and the table board 2 Can be stored in the storage space 1'of the seat back S1.

As described in detail above, the seat back structure for an automobile seat of the present invention allows the table board 2 to be retracted into and retracted from the storage space 1 ′ provided on the back surface of the seat back S1 via the link mechanism 3a. The table board 2 provided and pulled out is locked by the lock plate 4 provided in the storage space 1 ′ so as to maintain the pulled-out state, and once locked, the table board 2 is provided at the base end portion of the seat back S 1. Since the lock cannot be released unless the knob 6 is operated, the table board 2 pulled out from the back surface of the seatback S1 and once set has a considerable weight applied to it. However, it will not descend unless the lock is released, and it is convenient to use with confidence.

In addition, when the table board 2 is stored, it can be stored simply by operating the knob 6, and the above-mentioned take-out and storage can be surely performed by an extremely simple operation, and operability is improved. It is also excellent from the aspect.

[0033]

[Effect of device]

 As described above, in the seat back structure for an automobile seat according to the present invention, a recess having a depressed central portion is formed on the back surface of the seat back with the peripheral portion formed, and the link mechanism is formed in this recess. A table board is provided so as to be retractable through the table board, and locking means for locking the table board pulled out from the recess is provided. The locking means is a shaft that is rotatable about a horizontal axis in the seat back. A lock plate supported and having a plurality of locking grooves, a lock pin provided in the link mechanism and corresponding to the locking groove, and the lock plate attached so that the lock pin and the locking groove engage with each other. The link mechanism moves against the urging means when the table board is pulled out from the back of the seat back, because the urging means urges the table bow. When the pull-out operation of the is stopped, the lock pin provided on the link mechanism is fitted and locked in one of the locking grooves provided on the lock plate, and the table board is maintained in the pulled-out state. It is convenient because you can write or eat and drink in the car, which was inconvenient.

To store the once pulled out table board, a force larger than the urging force of the urging means may be applied in the table board storing direction. By doing so, the lock plate is rotated about the horizontal axis to release the locking, and the movement of the link mechanism allows the table board to be stored in the seat back.

If the seat back is provided with a lock releasing means for releasing the lock by the locking means, the table board once pulled out does not have to exert a large force against the urging means. It is convenient that the lock is released by operating the lock releasing means, and the table board can be easily stored in the seat back.

As described above, in the automobile seat of the present invention, the table board is provided on the back surface of the seat back so that the table board can be retracted and retracted. Therefore, the table board is usually housed in the seat back and is narrow. Even in the inside of a small car, there is no situation where space is taken up, and when the table is needed, the table is immediately set in the car by pulling out the table from the back of the seat back, and It is possible to change to a more convenient and comfortable living space, and as a result, the application range of small vehicles can be further expanded, which is extremely beneficial for enhancing the vehicle life.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a seat back structure of an automobile seat of the present invention.

FIG. 2 is a partially enlarged perspective view of FIG.

FIG. 3 is a side view showing a part of a lock plate.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

[Explanation of Codes] 1 Frame 11 Bottom plate 1'Storage space 12 Side wall 13 Overhanging part 14 Step part 2 Table board 21 Crosspiece 3 Cross rod 3a Link mechanism 31 First rod 32 Second rod 32a Lock pin 33, 34, 35 , Shaft 4 lock plate 41 locking groove 5 torsion bar 6 knob 61 horizontal shaft 62 abutting claw 63 operation part S seat S S1 seat back S1 S2 seat bottom S2

Claims (2)

[Scope of utility model registration request] 1. A vehicle seat in which a seat back is foldably connected to a seat bottom, wherein a rear surface of the seat back is provided with a recessed portion having a central portion depressed with an edge portion formed around the back surface. A table board is provided in the recess so that it can be retracted and retracted via a link mechanism, and locking means is provided for locking the table board pulled out from the recess. The locking means is provided around the horizontal axis in the seat back. A lock plate rotatably supported and having a plurality of locking grooves, a lock pin provided in the link mechanism and corresponding to the locking groove, and the lock pin and the locking groove engaged with each other. A seat back structure for an automobile seat, comprising a biasing means for biasing the lock plate. 2. The seat back structure for an automobile seat according to claim 1, wherein the seat back is provided with a locking release means for releasing the locking by the locking means.