JPH0513634Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a vehicle seat, specifically an automatic adjustment mechanism that adjusts the height position, front and back position, headrest part, seat surface, etc. to the optimal position for each user. This invention relates to improvements to vehicle seats equipped with a vehicle seat.

(Prior art and its problems) Conventionally, this type of vehicle seat has a headrest portion, a backrest portion, an upper surface of the seat portion, a thigh support portion, and a side support portion, each of which has a bulging or recessed surface, or a seat portion that is As a means to move the seat body forward and backward, the expansion mechanism, vertical movement mechanism, and forward and backward movement mechanism are automatically operated using hydraulic cylinders, air cylinders, drive motors, etc. to find the optimal position for each user. I took it seriously.

However, in the conventional technology described above, the cylinders, drive motors, etc. are expensive, and the wiring to the drive motors is complicated, leading to a rise in manufacturing costs.Moreover, the surfaces of the headrest, backrest, etc. are swollen. If it is pushed out, there is no escape to return to the immersion direction, so if it is pushed out even a little too much, it gives a strange feeling and impairs the usability, which is not desirable.

Furthermore, because it was not equipped with safety devices such as stoppers associated with the vertical movement mechanism and forward/reverse movement mechanism, it sometimes moved due to sudden braking, collisions, or other unexpected external forces, resulting in a lack of safety.

(Problems to be solved by the present invention) The present invention was devised in view of the above-mentioned problems of the prior art, and its purpose is to solve the problem of expanding and contracting an expandable body consisting of a plurality of air bag bodies. To provide a vehicle seat that operates each part and supports the seat part and the seat body in a predetermined position to ensure an optimal position for each user, and aims to reduce manufacturing costs by simplifying the structure, It also aims to improve usability and safety.

(Means for Solving the Problems) The technical means achieved by the present invention to achieve the above object are the support plate of the backrest body inserted into the backrest body holder and the stopper in the backrest body holder. Between,
A backrest part that supports the backrest body above the backrest body holding part by disposing an extensible body that tilts the backrest body forward and backward by expansion and contraction, and a support plate for the headrest part inserted into the backrest part. A head rest part that supports the head rest body above the back rest part by disposing an elastic body for tilting the head rest body forward and backward between the stopper part in the back rest part; An extensible body is disposed below the support plate for vertical movement of the upper surface of the supported seat, and an expandable body is disposed to move the support plate up and down by expansion and contraction, and an expandable body is disposed below the thigh support plate of the thigh support portion disposed in front of the seat main body. An extensible body that moves the thigh support plate up and down by contraction is provided, and an extrusion plate that supports the thigh support plate in front of the seat body and moves it back and forth is inserted into the seat body, and at the rear of the extrusion plate. A seat section comprising an extensible body that moves the extruded plate back and forth by expansion and contraction, and support plates for each support section inserted into required locations on both sides of the backrest and within required locations on both sides of the seat. and a side support part formed by disposing an elastic body for tilting the main body of the support part inward and outward between the stop parts provided in each of the side parts, and a seat part is formed from the bottom part of the seat part. A seat main body is formed by providing support legs that are divided into two parts via an intermediate base and support the seat part vertically movably across the lower surface of the seat and the intermediate base, and the lower surface of the seat and the intermediate base are separated. A vertically movable expandable body that moves the seat part up and down by expansion and contraction is arranged in between, and slide frames provided on both sides of the lower surface of the seat body are slidably arranged on rails fixed to the seat mounting floor surface. A retractable body for moving the seat body forward and backward by expansion and contraction is arranged between the base and the mounting floor, and an engaging portion that can freely engage with the seat portion is provided at a required location on the upper surface of the intermediate base. The engaging part is approximately L-shaped, consisting of a horizontal part and a vertical part, and rotatably supports the bent part, and the engaging part is provided between the tip of the horizontal part and the upper surface of the intermediate base. An elastic body for the engagement part having a smaller capacity than the elastic body for vertical movement that rotates the engagement part by expanding and contracting across the seat is disposed, and can be freely latched to the rail at a required location on the side of the seat body. A latching part is provided to restrict the forward and backward movement of the seat body, and the latching part is parallel to and rotatably attached to a latching part protruding from a predetermined location on the side of the seat body. and an elastic body for a hanging device having a smaller capacity than the elastic body for forward and backward movement, which rotates the hanging device by expansion and contraction, is disposed between the hanging device and the stopper. Each of the above-mentioned elastic bodies is formed by stacking a plurality of air bag bodies and joining them in a continuous manner.

(Function) When adjusting each part of the seat part using the technical means described above, first, the elastic body for the backrest body, the elastic body for the headrest part, the elastic body for the support plate for vertical movement of the upper surface of the seat, the thigh support When air is supplied into any of the elastic bodies for the board or the elastic bodies for the side support plates on both sides of the seat and on both sides of the backrest, the air will flow in the form of communication that constitutes each elastic body according to the amount of air supplied. Each of the joined air bag bodies inflates and extends in the direction in which the air bag bodies overlap,
The support plate of the backrest body and the support plate of the headrest part are each pressed rearward to tilt the backrest body and the headrest body forward, and the support plate for vertical movement of the seat top surface and the thigh support plate are pressed upward to tilt the seat. bulge out the surface of the thigh support part, lift the surface of the thigh support part upward, press outward the support plates of the side support plates on both sides of the seat part and both sides of the backrest, and move the respective side support parts to the center of the seat part and the center of the backrest part. When each part reaches its optimum position, the air supply is stopped.

Furthermore, when the respective parts are pressed, the respective support plates and the support plates press the respective expandable bodies due to the pressing force, and the air in each expandable body is compressed, so that the air can escape downward to an appropriate extent.

Then, when the air inside each expandable body is discharged and the expandable body is contracted, the pressing force against each support plate and the support plate when the air bag body constituting the expandable body is inflated is weakened, and the backrest body and the headrest body are pushed back. The seat and thigh support parts should be moved downwards.
Each side support part moves outward and stops discharging air at the optimum position.

In addition, when air is distributed or discharged into the expandable body disposed behind the extrusion plate that supports the thigh support part and allows it to move back and forth, each air bag body expands and contracts in the direction in which they are arranged side by side, causing the extrusion plate to move back and forth. Then move the thigh support back and forth to find the optimal position.

Next, when the seat section is raised, when air is supplied, each of the air bag bodies connected in a continuous manner constituting the elastic body for the engagement section, which has a small capacity, moves between one end of the horizontal section of the engagement section and the intermediate base. The air bag expands in the direction in which the air bags overlap, pushing up one end of the horizontal part, and at the other rotatable end, the vertical part rotates in the release direction, causing the receipt part and the engaging part to move together. The engagement is released and the seat part becomes able to move up and down, and then each of the air bag bodies that are connected in a continuous manner and make up the vertical movement expandable body expands between the lower surface of the seat and the intermediate base, and the air bag bodies When the sheet portion is extended in the overlapping direction, the sheet portion is raised, and the supply of air is stopped at the required optimal position of the sheet portion, the air inside the elastic body for the engaging portion is discharged and contracted, and the engaging portion is free to rotate. The vertical portion rotates in the engagement direction at the provided portion, and the vertical portion engages with the seat portion to support the seat portion in an optimal position.

In addition, when lowering the seat part, in order to discharge the air inside the vertical movement expandable body,
First, air is injected into the elastic body for the engagement part and expands, and the engagement of the engagement part is released from the seat part.Then, the air in the elastic body for vertical movement is discharged, and the pressing force on the seat part is weakened. is lowered and stops discharging air at the required optimum position, the air in the elastic body for the engaging part is discharged, the engaging part engages with the seat part, and supports the seat part at the optimum position.

In addition, when the seat body is moved back and forth, when air is supplied, each air bag body, which is connected in a continuous manner and constitutes a small capacity elastic body for a latching device, expands between the stop portion and the latching device. , when the air bags are extended in the direction in which they overlap and the latches are pressed,
The latching tool rotates using the pivot as a fulcrum, the latching between the rail and the latching tool is released, and the seat body becomes able to move forward and backward, forming an air-supplied telescopic body for forward and backward movement. When each air bag body connected in a communicating manner is inflated and extended in the direction in which the air bag bodies overlap to move the seat body forward or backward, and the supply is stopped at the optimum position, the air bag body in the inflated state is As the air is exhausted, the pressing force against the latching tool is weakened, and the latching tool supports the seat body by latching onto the rotation rail using the shaft support as a fulcrum.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. The lower part of the seat part A' is divided into two parts via the intermediate base 21, and the lower surface of the seat part A' and the intermediate base 21 are separated. Support legs 22, 22 are provided on the left and right sides in the vehicle traveling direction to form the seat body A, and slide frames are provided on both side edges (in the vehicle traveling direction) of the lower surface of the seat body A (lower surface of the intermediate base 21). 24, 24 are slidably arranged on rails 27, 27 provided on the seat mounting floor surface Z, and a seat portion is disposed on the intermediate base 21 of the seat body A.
The engaging part 30 that engages with A' is connected to the engaging part elastic body 33.
At the same time, a hooking portion 31 to be hooked to the rail 27 is provided on the side surface of the seat body A via an elastic body 34 for the hooking portion, and a space X between the seat portion A' and the intermediate base 21 is provided. A telescopic body 28 for vertical movement of the seat portion A' is disposed in the space Y between the seat body A and the mounting floor Z, and a telescopic body 29 for forward and backward movement of the seat body A is disposed in the space Y between the seat body A and the mounting floor Z. .

The seat part A' includes a backrest part a, a headrest part b,
Consisting of a seat c and side support parts d for the seat and backrest, a frame 101 serving as the skeleton of each is formed of a steel plate or the like, and the surroundings of each frame 101 are It is formed by covering a cushion material 102 of a required thickness and a trim cover 103 either integrally or separately.

The backrest part a consists of a backrest main body 1 and a backrest main body holding part 2, and the backrest main body 1 has a hollow interior 1 on its upper end surface.
An opening 1b is provided in communication with the opening 1b, and supports 1c,
1c is provided in a protruding manner, and the support plate 1d is integrally formed by bulging downward between both sides, leaving both sides of the lower end face opposite to the upper end face provided with the opening 1b, and the support plate 1d is Flat plate body 1 extending integrally with back plate 1e
d′ and both side edges 1d″, 1d″, and both side edges 1
A case 4 in which shaft holes 3, 3 are bored on the same axis in the upper portions of d'' and 1d'', respectively, and a portion of the hollow interior 1a facing the opening 1b is opened,
It is fixed to the inner surface of the back plate 1e using screws (not shown) or the like.

Like the backrest main body 1, the backrest main body holding part 2 has an opening 2b on its upper end surface that communicates with a hollow interior 2a.
A case 4' is provided with support parts 2c, 2c formed on the upper edge surface of both longitudinal ends of the opening 2b, and a portion of the hollow interior 2a facing the opening 2b is opened. It is fixed to the inner surface of 2d using screws (not shown) or the like.

Then, the support plate 1d of the backrest body 1 is loosely inserted into the case 4' through the opening 2b of the backrest body holder 2, and the support plate 1d provided on the upper end surface of the backrest body holder 2 is inserted loosely into the case 4'. Shaft holes 2c', 2 of parts 2c, 2c
c' and the shaft holes 3, 3 of the support plate 1d are communicated, the long shaft 5 is inserted, and the backrest main body 1 is integrally supported on the backrest main body holding part 2 so as to be rotatable back and forth, And the support plate 1d and the inner surface of the front wall of the case 4' (impingement part)
4'a, an elastic body 6 for the backrest main body is provided.

Note that the openings 1b, 2b and the cases 4, 4'
The support plate 1d of the backrest main body 1 and the support plate _b2 of the head rest portion D to be described later have a large opening within the required rotatable range.

Further, the blocking portion 4' is not limited to the above-mentioned one, and for example, the blocking portion 4' is provided on the back plate 1e of the backrest main body 1.
The support legs may be arranged in parallel toward the front, and a plate may be provided between the support legs, and the plate may be used as the blocking portion 4'. A plate may be provided and the top plate may be used as the blocking part 4',
There are no particular restrictions.

Furthermore, in the illustrated example, an attraction spring 7 is stretched between the backrest main body 1 and the backrest main body holding part 2,
It is assumed that this spring 7 always applies a backward pulling force to the backrest body 1.

Note that the backrest part a in this embodiment is attached to the rear end of a seat part c, which will be described later, so as to be freely foldable.

The headrest b is formed by curving the occipital contact surface 8 to naturally follow the occipital region.A support plate _b2 is integrally provided at the lower end of the headrest main body _b1 , and the support plate _b2 is the lower end of the main body _b1. A flat plate body b ₂ ′ is suspended from the flat plate body b 2 ′, and is slightly bent forward from its midway point, and both side edges b ₂ ″, b ₂ ″ are extended forward, and both side edges b ₂ ″ , b ₂ '' are formed by drilling shaft holes 9, 9 on the same axis line, respectively, in the upper portion of the backrest portion a, and the support plate 1b is inserted into the backrest main body 1 through the opening 1b of the backrest main body 1 of the backrest portion a. The shaft holes 1c', 1c' of the support parts 1c, 1c provided on the upper end surface of the backrest main body 1 communicate with the shaft holes 9, 9 of the support plate _b2. The headrest main body b ₁ is pivotally supported on the backrest portion a by inserting the long shaft 10 therethrough so as to be rotatable back and forth, and between the support plate b ₂ and the inner surface of the front wall (blocking portion) 4a of the case 4. An elastic body 11 for the headrest portion is disposed at the headrest portion.

In addition, in the illustrated example, a tensioning spring 12 is stretched between the headrest b and the backrest part a,
It is assumed that this spring 12 always applies a backward pulling force to the headrest portion b.

The seat c is made by placing a case c ₃ with an open front on the bottom plate c ₂ of the seat main body c ₁ formed into an arbitrary shape, with the open front face facing the front plate c ₄ of the seat main body c ₁ . A substantially T-shaped support plate 13 for vertical movement of the upper surface of the seat, consisting of a push-up part 13a and a pivot support 13b, is attached to the rear of the upper surface of the case _c3 , and the pivot support 13b is rotatably supported. , a telescopic body 14, which will be described later, is arranged between the inner surface of the push-up part 13a of the support plate 13 and the upper surface of the case _c3 , and a thigh support part 15 is provided in front of the seat main body _c1 , and the thigh support part 1
5 is, for example, an extrusion plate main body 1 formed in a rectangular shape.
A stopper 15a'' is integrally formed at the rear end of 5a' to form an extrusion plate 15a, and a downwardly inclined stopper 15b' is integrally formed at the tip of the extrusion plate 15a. At the same time, an elongated rectangular support plate 15b'' having one end rotatably supported on the side edge of the tip of the extrusion plate body 15a' is provided on the top of the stopper part 15b' at the tip. frame grooves c 5 , _{c 5 with} open faces facing each other are provided above the inner wall of the case c ₃ on both sides of the seat main body c ₁ over a midway portion in the longitudinal direction, and Both sides of the extrusion plate 15a are slidably inserted into the grooves _c5 , _c5 , and the support plate 15b'' is positioned in front of the seat main body _c1 and the stopper part 15a'' is positioned inside the case _c3 . Between the inner rear wall of case c ₃ and the stop portion 15a″ and the support plate 1
5b'' and the stop portion 15b' are provided with expandable bodies 16, 16, respectively, which will be described later.

Also, between the support plate 13 for vertical movement of the seat and the case _c3 , the support plate 15b'' of the thigh support part 15 and the stopper part 15b', the stopper part 15a'' of the extrusion plate 15a and the inside of the case _c3. Attracting springs (not shown) are stretched across the rear wall, and these springs are used to push the support plate 13 for vertical movement of the seat part and the support plate 15b'' of the thigh support part 15 downward, and also to push out the extrusion plate 15a. It is assumed that an attractive force is constantly applied to each rearward direction.

It should be noted that the pulling spring that is stretched over the support plate 15b'' is either installed internally or covered with the trim cover 103 so that it is not exposed to the outside.

Also, the rear surface of the seat part A', for example, the seat part c.
c' has a stepped groove 17' that engages with an engaging portion 6, which will be described later.
An engaged portion 17 is integrally provided.

The side support portions d are provided at required locations on both sides of the backrest portion a and the seat portion c, and are formed with a support plate _d2 integrally provided below a support portion main body _d1 having a substantially triangular planar shape. The support plates d'... are placed inside the backrest part a, for example, on both sides of the backrest main body holding part 2 and on the both sides of the seat part c, _respectively .
Hold each support plate d ₂ with the wide side facing inward.
is inserted through the insertion opening d ₄ formed by the edge of the blocking portion d ₃ provided in each side and the edge of each side, and the support plate d _{2 is inserted above the support plate d 2} . The shaft holes 18, 18 drilled in the parts are communicated with the shaft holes _d4 ', _{d4' of} the support parts d4, _d4 provided on the side of the stopper part _d3 , and the long shafts 19... are inserted thereinto. While being rotatably supported, elastic bodies 20 for side support portions are disposed between each of the blocking portions d ₃ and the support plates d ₂ .

In addition, each side support part d... is also tensioned with a pulling spring (not shown) between the respective stopper part _d3 ... and support plate _d2 ..., and with this spring, the side support part d... is always kept from the outside. Assume that an attractive force is applied toward .

Therefore, the seat portion configured as described above
A seat main body A is formed by providing support legs 22, 22 across A' and an intermediate base 21 disposed below it.
a, 22a are pivoted in a crossed manner to form an integral body, and each free end thereof is pivoted to mounting support portions 23 provided at the front and rear of both sides of the lower surface of the seat portion A' and the upper surface of the intermediate base 21, respectively. At least they are provided on the left and right sides in the vehicle traveling direction between the seat portion A' and the intermediate base 21.

At this time, a required horizontal groove 23a is provided in the mounting support part 23' provided on the rear side among the mounting support parts 23, and the corresponding end of the support leg 22 is slidably attached to the horizontal groove 23a. As a result, the support legs 22 take on a pantograph shape and support the seat portion A' in a vertically movable manner.

The intermediate base 21 is formed integrally with a press plate 21b having a width smaller than the horizontal width of the flat plate part 21a directed downward from approximately the center of the horizontal axis line of the lower surface of the flat plate part 21a, which is formed to have approximately the same size as the seat part c. Elongated slide frames 24, 24 having a substantially approximate cross section are fixed in parallel on the lower surface of the flat plate portion 21a from the front end to the rear end in the left and right directions in the vehicle traveling direction.

Then, the slides are placed on rails 27, 27 provided via rail mounting tables 26 on both sides of the upper surface (vehicle traveling direction) of the mounting plate 25 on which the slide frames 24, 24 are fixed to the mounting floor surface Z. Frame 24, 2
4, the seat body A is slidably arranged.

The rail 27 has a groove 27 on the outer surface in the longitudinal direction.
A large number of concave grooves 27a are provided, and the grooves 27a protrude outward when the rail 27 is aligned with the slide frame 24.

In the space X between the seat part A and the intermediate base 21, an elastic body 28 for vertical movement of the seat part A is provided.
In the space y between the seat body A and the mounting floor Z, extendable bodies 29 for moving the seat body A forward and backward are provided, and an engaging portion 3 is provided on the upper surface of the intermediate base 21.
A hooking portion 31 is provided on the side surface of the seat body A.

The engaging portion 30 has a substantially L-shaped side surface consisting of a horizontal portion 30a and a vertical portion 30b, and grooves 30b' are cut in the horizontal direction on the front surface of the vertical portion 30b to form an engaging member 30'. The vertical portion 30b has a length sufficient to engage the engaged portion 17 when the seat portion A moves up and down.

The bent portion of the engaging tool 30' is pivotally attached to a mounting groove 32 provided outwardly from the support leg 22 and protruding from the rear end edge of the intermediate base 21. The engaging portion expandable body 33 is arranged between the distal end surface of the horizontal portion 30a and the intermediate base 21.

The hooking part 31 includes, for example, a claw part 31 at the lower part of the receiving part 31a that matches the groove 27a of the rail 27.
In addition to providing one or more mounting pieces 31c,
31c is provided to protrude to form a hook 31', and the hook 31' is provided to protrude outward from the longitudinal side surface of the slide frame 24 at right angles.
5, 35, the shaft hole 3 of the mounting pieces 31c, 31c
1c', 31c' and the shaft hole 35' of the support pieces 35, 35,
35', the long shaft 36 is inserted therethrough, and the long shaft 36 is rotatably supported.

In addition, the hook 31' has a receiving part 31a in a planar-shaped blocking part 38 that projects perpendicularly from the side surface of the support stand 37 provided on the intermediate base 21'. It is assumed that it is located parallel to the blocking surface 38', and an elastic member 34 for the hook is disposed between the blocking surface 38' and the receiving portion 31a.

In addition, a pulling spring 3 is attached to the hook 31'.
9 is provided, and this spring 39 always applies a return force to the hook 31' toward the blocking surface 38' of the blocking portion 38.

Next, each elastic body 6 arranged in the seat part A',
11, 16..., 20... and vertical movement elastic body 28,
To explain the elastic body 29 for longitudinal movement, the elastic body 33 for the engaging part, and the elastic body 34 for the hook part, each of the elastic bodies 6 is an air bag body 40a molded using a molding sheet 40 having a three-layer structure. Two or more of these are stacked and joined together by heat welding the central part of the contact surface of the overlapped parts, or by heat welding etc. the part along one side of the stacked parts. When inflated, the other edge on the side facing the joint part opens and extends so that the end face is approximately V-shaped, and within the area of these joint parts there is a ventilation hole that allows the respective air chambers 40a'... to communicate with each other. 41... has been opened.

In addition, each elastic body 6 disposed in the seat portion A is formed to a size suitable for the space in which it is disposed, and the elastic body 33 for the engagement portion is similar to the elastic body 2 for vertical movement.
8, the hooking part elastic body 34 is the same as the forward/backward movement elastic body 2.
Each capacity is smaller than that of 9.

To explain an example of the air bag body 40a..., the air bag body 40a... is woven from a thread having a thickness of 50 to 100 microns that is both inelastic and has high tensile strength, for example, a thread made of polyester or polyamide. A cloth material 40' having a mesh number of 70 to 200 is sandwiched between two thermoplastic synthetic resin sheets 40'' and 40'' made of thermoplastic soft urethane resin, etc., which are somewhat harder than normal ones, and both thermoplastic synthetic resin sheets 40'' and 40'' The resin sheets 40'', 40'' are entirely thermally welded to each other to form the three pieces 40'', 40', 40'' into a desired shape (approximately rectangular in the illustrated example). Cut and form the sheet 40
Two sheets are stacked on top of each other, and their peripheral edges are heat welded to form a mold.

Further, an air supply port 42 for introducing and removing air into the air chamber 40a' is provided at the periphery of one of the air bag bodies 40a.

The above-mentioned molding sheet 40 is prevented from elongating by the cloth material 40', and the molding sheet 40 is
The flesh pressure of the sheet 40 can be suppressed to such an extent that the flexibility of the sheet 40 is not impaired.

In addition, the air bag body 40a formed using this forming sheet 40 is less likely to deform when high pressure is applied to the air chamber 40a', and less likely to cause wrinkles due to lack of flexibility during inflation. .

In this embodiment, the elastic body 11 for the headrest part and the elastic body 6 for the backrest part are substantially the same as the elastic body 28 for vertical movement of the seat part, as shown in FIG. The elastic body 16 is a first
As shown in Fig. 6, the elastic members 20 for the seat, backrest, side support, etc., which are almost the same as the elastic members 29 for moving the seat main body forward and backward, are used for the engaging parts and the hooking parts as shown in Fig. 17. Similarly to the elastic bodies 33 and 34, the elastic body 16 for vertical movement of the upper surface of the seat is made of a large-sized elastic body.
As shown in FIG. 18, an elastic body similar to the elastic body 16 for vertical movement of the side support plate is used.

The joining method and the number of stacks of the air bag bodies 40a described above are not subject to any restrictions and may be determined as appropriate to fit the space in which they are installed.

Therefore, each elastic body 6 disposed at each predetermined position of the seat part A, the vertical movement elastic body 28, the forward/backward movement elastic body 29, the engaging part elastic body 33, and the hooking part elastic body 34. Air pump 43 for each air supply port 42...
Air supply pipes 44' from valves (three-way electromagnetic valves in this embodiment) 45 disposed through air supply pipes 44 are connected through connecting pipes 46.

Incidentally, the vertically movable telescopic body 28 is disposed between the support base 37 disposed in the space The air bag bodies 40a are arranged in parallel in the vehicle traveling direction in a case 47 fixed to the arrangement plate 25 with the lower pressing plate 21b of the intermediate base 21 sandwiched therebetween in the case 47, and the pressing plate 2
1b, the front part is a backward telescoping body 29a, and the rear part is a forward telescoping body 29b.

First, in order to operate the backrest part a, headrest part b, etc. of the seat part 1, the desired button 4 is selected from the operation buttons 47 for each part provided together with the operation switch (not shown) of the air pump 43, etc.
7a... is set to the valve open position, and the air pump 43
When air is supplied from the air supply port 42 through the air supply pipe 44', the air passes through the vent hole 41 from within the air chamber 40a' of one air bag body 40a, and is transferred to the other air bag body 40a. The air flows into the air chamber 40a' of the air bag body 40a...
The desired expandable body 6 itself is expanded in the direction in which the air bag bodies 40a overlap.

As a result, the support plate 1d of the backrest main body 1 of the backrest part a or the support plate _b2 of the headrest part b are respectively pressed rearward according to the amount of extension of each elastic body 6, and the backrest main body 1 or the headrest The main body b ₁ is tilted forward, and the support plate 13 or thigh support plate 15b'' for vertical movement of the upper surface of the seat is pressed upward to bulge the surface of the seat or lift the surface of the thigh support part 15 upward, and the seat c The support plates d ₂ of the respective side support parts d on both sides of the backrest part a are pressed outward to push the respective side support parts bodies d ₁ inward, that is, toward the center of the seat part c, and to the backrest part. When each part is at its optimum position, each operation button 47a is set to the valve closed position and the air supply is stopped.

That is, each valve 45... is connected to each operation button 47a.
When set to the valve open position, the inlet and outlet shall be open and the discharge port shall be closed, and when the valve is set to the valve closed position, the inlet, outlet and discharge port shall be closed.

In addition, from this state, the backrest part a or the headrest lower part b can be tilted backward, the seat surface or the thigh support part 15 can be lowered, or each side support part d...
To tilt outward, press each operation button 4.
7a... to the discharge position, each valve 45
... closes the inlet and opens the outlet and discharge port, and discharges the air inside each air bag body 40a to the outside, thereby contracting each elastic body 6, weakening the pressing force on each of the above parts, and causing the contraction. Each part slopes or descends depending on the amount.

Also, when the thigh support part 15 is adjusted back and forth, the same operation as described above causes the extensible body 16 to expand and contract in the direction in which the air bag bodies 40a... The optimum position is obtained by moving the support body 15' back and forth.

Next, to explain the case of operating the seat part A' and the seat body A, first, the seat part A' and the seat body A are operated.
When raising A', the operation button 47g for vertical movement provided together with the operation switch (not shown) of the air pump 43 is set to the open position, and the air sent from the air pump 43 is transferred to each air supply pipe 4.
When the air is supplied from the respective air supply ports 42 and 42 through the air supply ports 4' and 44', the air chamber 40 of one air bag body 40a constituting the small-capacity engagement part elastic body 33 is first filled.
It passes through the ventilation hole 41 from inside a' and flows into the air chamber 40a' of the other air bag body 40a, quickly inflating both air bag bodies 40a, 40a and expanding the expandable body 33 itself into a substantially V-shaped cross section. , push up one end of the horizontal part 30a of the engaging tool 30' to be placed, rotate it rearward about the shaft attachment part as a fulcrum, and align the grooves 30b' of the vertical part 30b' with the seat of the seat part A'. The stepped grooves 17' of the engaged part 17 provided in part c come off,
The seat portion A' becomes in a state where it can be raised.

After that, each air bag body 40a, 40a constituting the vertical movement telescopic body 28 is moved to the space X.
Like the air bag bodies 40a', 40a', air is sent inside and expanded, and the air bag bodies 40a, 40
a, and pushes up the lower surface of the seat part A' to extend the support legs 22, 22 in a pantograph shape, and raise the seat part A'.

That is, the valve 45 associated with the vertically movable telescopic body 28 and the valve 45 associated with the engaging portion telescopic body 33 each have an open inlet and an outlet, and a closed discharge port.

Then, the operation button 49g is placed in the required optimum position.
When the air supply is stopped by switching the valve to the closed position,
The valve 45 of the vertically movable telescopic body 28 closes the inlet, the outlet, and the discharge port, and the valve 45 of the engaging part telescopic body 33 closes the inlet and opens the outlet and the discharge port, respectively. The air inside the expandable body 33 is discharged and contracted, and the pressure pushing up the horizontal part 30a of the engagement tool 30' is removed, and the engagement tool 30' is rotated at the rotatable portion. The grooves 30b' of the vertical portion 30b engage with the step grooves 17' of the engaged portion 17 of portion A', supporting the seat portion A' in that position.

At this time, the elastic body 28 for vertical movement is maintained in an expanded state.

In addition, when lowering the seat part A', set the operation button 47g to the ejection position.
First, for the required time (for example, about 2 seconds), the elastic body 2 for vertical movement
Air is supplied to 8, and the engaging tool 30' and the engaged part 1
The load applied to 7 and 7 is set to 0, and air is supplied to the engaging part elastic body 33 to release the engaged state,
After that, each air bag body 4 of the vertical movement elastic body 28
The air in 0a, 40a is exhausted, the expandable body 33 is contracted, and the support legs 22, 22 are contracted into a pantograph shape, and the seat portion A' is lowered to the optimum position.

That is, in this case, the valve 45 of the telescoping body 28 and the valve 45 of the telescoping body 33 close the discharge port and open the inlet and outlet, respectively, as air is supplied from the air pump 43 in the same way as in the momentary upward movement. When the engaging member 33 is disengaged from the engaged portion 17 of the seat portion A', only the inlet of the valve 45 of the expandable body 28 is closed, and the outlet and the discharge port are opened.

Then, when the operation button 47g is switched to the valve closing position, the valve 45 closes the inlet and opens the outlet and discharge port, so that the air inside the engaging part elastic body 33 is discharged and contracted, and the engaging member 30 ' grooves 30b' support the engagement receipt part A' in the step grooves 17' of the engaged part 17 of the seat part A'.

On the other hand, to explain the case of moving the seat body A forward or backward, first, in order to move the seat body A forward, the operation button 47h for forward and backward movement provided together with the operation button 47g for vertical movement is set to the forward valve open position. Then, the air sent from the air pump 43 is supplied to the hanging tool elastic body 34 and the rear advancement elastic body 29 from the respective air supply ports 42, 42 via the respective air supply pipes 44', 44'. Then, the air first flows from the air chamber 40a' of one air bag body 40a constituting the small capacity elastic body 34 for a hanging device, passes through the ventilation hole 41, and flows into the air chamber 40a' of the other air bag body 40a. Both air bag bodies 40a,
40a is quickly inflated to extend the expandable body 34 into a substantially V-shaped cross section, and rotated on the shaft support to press the receiving portion 31a of the latch 31' toward the seat body A side, and the claw portion 31b is attached to the rail 27. from the groove 27a, and the seat main body A becomes able to move forward.

Then, each air bag body 40a constituting the rear forward movement expandable body 29a is added later.
Similar to the air bag body 40a, air is sent between the rear surface of the inner wall of the case 47 and the push plate 21b, and the air bag body expands in the direction in which the air bag bodies 40a are arranged side by side (vehicle traveling direction), pushing the push plate 21b forward. By pressing , the seat body A moves forward.

At this time, the other backward telescopic body 29b disposed at the front is contracted by the action of the valve 45 as the forward forward telescopic body 29a expands.

That is, when the operation button 47h is set to the forward valve opening position, the valve 45 associated with the forward telescopic body 29a and the valve 4 associated with the latching member telescopic body 34 are opened.
5 opens the inlet and the outlet and closes the discharge port, and the valve 45 associated with the reversing telescopic body 29b closes the inlet and opens the outlet and the discharge port.

Therefore, the air from the air pump 43 is supplied to the forward telescopic body 29a and the fastener telescopic body 34 through the valves 45, 45, and is not supplied to the backward telescopic body 29b, and the air is Expandable body 29
The air that had been supplied by the pressing force due to the expansion of a is discharged from the outlet and contracted.

Then, when the seat body A reaches the optimum position, the operating button 47h is set to the valve closing position and the air supply is stopped, and the forward telescopic body 29
The inlet and outlet of the valve 45 related to a are closed, and the inlet of the valve 45 related to the elastic member 34 for the hanging tool is closed, and the outlet is left open, and the outlet is opened, and the outlet for the hanging tool is closed. The air in the expandable body 34 is expelled and it contracts, and the receiving part 31 of the hook 31'
The pressing force applied to a is weakened, and the latching tool 31'
is the stopping surface 38' by the pulling spring 39.
The seat body A is pivoted to the side, and the claw portion 31b is engaged in a predetermined groove 27a of the rail 27, supporting the seat body A at a predetermined position.

When the seat body A is to be moved backwards, the operation button 47h is set to the valve opening position for backward movement, and the backward movement elastic body 29b and the latch elastic body 34 are moved backward.
After air is supplied to inflate the latching member 34, the retracting member 29b is inflated.

Therefore, in this case, the valve 45 associated with the backward telescoping body 29b and the valve 45 associated with the fastener telescoping body 34 open the inlet and outlet, and the discharge port is closed, and the valve 45 associated with the forward telescoping body 29a opens the inlet and the outlet. The inlet is closed and the outlet and discharge port are open.
The predetermined position is obtained by performing the same operation as in the forward movement.

In the above embodiment, the operation switch 47 of the vertical movement telescopic body 28 and the engagement part telescopic body 33
g, or the forward/reverse telescopic body 29 and the hook telescopic body 3
Although the operation of each of the four operation switches 47h is performed by a single operation switch, it is also possible to provide separate operation buttons for the up and down movement, the engagement portion, the forward and backward movement, and the hooking device, and to operate them separately.

Incidentally, the above-mentioned operation buttons 47a are installed on the side of the seat body A within reach of the user for ease of operation.

(Effects of the invention) Since the present invention has the above-mentioned configuration, it has the following effects.

An elastic body formed by stacking a plurality of air bag bodies and joining them in a continuous manner is placed between each part of the seat part and between the seat part and the intermediate base,
They are placed between the seat body and the mounting floor, and are operated by supplying or discharging air to each expandable body to inflate and deflate, allowing use at each location, height position, and front and back position. The structure is greatly simplified compared to conventional vehicle seats, and there is no need for expensive drive motors or complicated wiring to the drive motors. As a result, manufacturing costs can be significantly reduced.

Furthermore, even if too much air is supplied, such as when the backrest main body is tilted forward, the air inside each airbag body is compressed appropriately and can escape from the ventilation holes into the plurality of airbag bodies. There is no strange feeling and the usability can be improved.

Furthermore, the thigh support part is movable back and forth in front of the seat using an elastic body, and its extruded plate can be stored in the seat so that the thigh support part is supported at the tip of the seat. The vertical movement as well as the back and forth movement can accommodate a wide range of leg lengths for each user, or when relaxing by stretching the legs, so there is no need to install a large thigh support plate at the tip of the seat as in the past. Since it can be made smaller, when the thigh support plate is not in use, it can be lowered to provide a wider leg space in front of the seat, which is very useful as it does not make the user feel cramped.

In addition, as a stopper for vertically moving the seat portion and engaging and supporting it in a predetermined position, an approximately L-shaped engaging tool consisting of a horizontal portion and a vertical portion is provided with its bent portion rotatably on the intermediate base. and a structure similar to that described above between the end of the horizontal part and the intermediate base,
In addition, a small-capacity elastic member for the engaging portion is provided, and as the engaging member expands and contracts, the engaging member rotates back and forth using the bent portion as a fulcrum, and the vertical portion can freely engage with the seat portion. It is also used as a stopper to move the seat body forward and backward and support it in a predetermined position.
A hanging device is rotatably supported in parallel with a blocking portion protruding from the side of the seat body at a required location, and a small-capacity container is provided between the blocking device and the blocking portion. By using an expandable and contractable body for the latching device, the latching device can be rotated back and forth and can be freely latched to the rail, so the seat part and the seat body can be safely supported in a predetermined position, and the structure is simple. Yes, it can be provided at low cost.

Furthermore, since the elastic body is constructed by stacking a plurality of air bag bodies, it is possible to lengthen the stroke of the elastic body, and it is possible to accommodate a wide range of arrangement of the elastic body in each part.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing an embodiment of the vehicle seat of the present invention, Fig. 2 is a longitudinal side view showing the operating state of the lower part of the seat, and Fig. 3 is a longitudinal cross-sectional view showing the backrest and headrest parts partially omitted. A side view, FIGS. 4 and 5 are cross-sectional plan views of the thigh support portion for the backrest, FIG. 6 is a vertical cross-sectional front view of the thigh support portion for the seat, and FIG. 7 is a cross-sectional plan view of the backrest. Figure 8 is a longitudinal sectional front view of the lower part of the seat, Figure 9
The figure is a side view with the side surface on the side where the engaging part is installed partially omitted, FIG. 10 is a side view with the side surface on the side where the hook part is partially omitted, and FIG. Fig. 12 is a side view showing the hook, and Fig. 12 is a vertical front view showing the hook.
Fig. 13 is a cross-sectional plan view showing the latched state, Fig. 14 is a schematic diagram showing the air supply system and control system, and Figs. 15 to 18 are overall diagrams showing one embodiment of the expandable body with a portion cut away. FIG. 19 is a perspective view of an embodiment of a molding sheet with a portion cut away. In addition, in the figure, A... Seat body, A'... Seat part, a... Backrest main body part, b... Headrest part,
c... Seat part, d... Thigh support part, 1... Backrest body, 2... Backrest main body holding part, 21... Intermediate base, 22... Support leg, 24... Slide frame, 27
...Rail, 27a ... Concave groove, 30 ... Engagement part,
31...Latching part, 6, 11, 16, 20, 28,
29, 33, 34...Extensible body, 40a...Air bag body, 40a'...Air chamber.

Claims (1)

[Scope of utility model registration request] Between the support plate of the backrest main body inserted into the backrest main body holding part and the stop part in the backrest main body holding part, an extensible body that inclines the backrest main body back and forth by expansion and contraction is disposed. A backrest part that supports the backrest body above the holding part, and an elastic body that tilts the headrest body back and forth between the support plate of the headrest part inserted into the backrest part and the stop part in the backrest part. A head rest part is disposed to support a head rest body above the backrest part, and a support plate for vertical movement of the upper surface of the seat part, one end of which is pivotally supported on the upper surface of the seat part body. A telescoping body for moving the thigh support plate up and down is provided, and a telescoping body for moving the thigh support plate up and down by expansion and contraction is arranged below the thigh support plate of the thigh support portion disposed in front of the seat main body, and the thigh support A seat comprising: an extrusion plate inserted into the seat body for supporting the plate in front of the seat body and allowing the plate to move back and forth; and an extensible body disposed behind the extrusion plate for expanding and contracting to move the extrusion plate back and forth. , a support part main body is inserted between the support plate of each support part inserted into the required parts of both sides of the backrest and the required parts of both sides of the seat and the stop part provided in each of the sides. A seat part is formed from a side support part formed by arranging a stretchable body that inclines inwardly and outwardly, the lower part of the seat part is divided into two parts via an intermediate base, and the seat part is divided into two parts across the lower surface of the seat and the intermediate base. A seat main body is formed by providing support legs that support the seat portion in a vertically movable manner, and a vertically movable elastic body is disposed between the lower surface of the seat and the intermediate base to move the seat portion up and down by expansion and contraction. , slide frames provided on both sides of the lower surface of the seat body are slidably arranged on rails fixed to the seat mounting floor surface, and the seat body is moved forward and backward by expansion and contraction between the intermediate base and the mounting floor surface. An advancing extendable body is provided, and an engaging portion that can freely engage with the seat portion is provided at a required location on the upper surface of the intermediate base to restrict the vertical movement of the seat portion, and the engaging portion is arranged vertically to the horizontal portion. The vertically movable telescopic body has a substantially L-shape consisting of a portion and rotatably supports the bent portion thereof, and rotates the engaging portion by expanding and contracting across the tip of the horizontal portion and the upper surface of the intermediate base. A small-capacity elastic member for the engaging portion is provided, and a hooking portion that can be freely hooked to the rail is provided at a required location on the side of the seat body to restrict the forward and backward movement of the seat body, and The stop part is provided with a rotatable catch that is parallel to the stop part protruding from the side surface of the seat body, and is latched by expansion and contraction between the stop part and the stop part. An elastic body for a hanging device having a smaller capacity than the elastic body for forward and backward movement that rotates the tool is arranged, and each of these elastic bodies is formed by overlapping a plurality of air bag bodies and connecting them in a continuous manner. A vehicle seat characterized by: