JP2011046235A - Seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat device of a vehicle capable of always being fitted to anywhere by anyone by securing functional beauty, providing simplicity, light weight and a beautiful style, securing safety and riding comfort, securing visual field having good visibility on both front and rear sides, for instance, allowing driving with relief by securing vibration resistance and rattling sound resistance, etc., and providing an untiring and weariless seat in long time driving. <P>SOLUTION: This seat device controls shock by a plurality of stages by absorbing shock by a seat cushion and/or a seat back by being operated together with a seat cushion unit of the seat cushion operated by a shock absorbing means provided in a torsion bar of the seat and a seat back unit of the seat back, next absorbing shock by a shock absorbing device provided between the seat and a base of the vehicle, and lastly absorbing shock by a headrest provided in a seat back frame to elevate and tilt forward. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a seat body that constitutes an optimum seat and a structure (seat device) of the incidental equipment.

Among the components of a vehicle, there is a seat as a means for protecting the ride and protecting against an impact. Therefore, this sheet is required to have the following structure.
1. The most suitable seats are: to ensure functional beauty and to have a simple, lightweight and beautiful style: in particular, safety, comfort and visibility. For example, the visibility is good both in the rear and the front: Furthermore, because vibration resistance, rattling noise, etc. are ensured, it can be driven with peace of mind, and it will not get tired even if it is driven for a long time, In addition, it is best if there is a seat that will never get tired and that anyone can fit anytime, anywhere.
2. The optimum seat design is: Thinking about the basics of physical engineering, small, light, and simple, the basic base, how far this idea was considered, why, and why, Moreover, unless we pursue whether this idea can be implemented, etc., it will always be a re-development every time, or it will be repeated every time, shape, structure, material, etc. It is usual to follow the path of retreat. Therefore, the following problem occurs.
3. The contents of the problem are: technical retreat, waste of technical man-hours, inability to use existing equipment, cost disadvantage, cost reduction, inferior energy saving And CO2 cannot be reduced.

In order to clear the above problems, it is necessary to achieve the following matters (solve issues).
(3-1) Explaining the requirements for the optimum sheet:
[A] The design requirement is to convert the indispensable movement associated with the impact into a physical quantity and confront this impact. In other words, a structure that cannot be converted into a physical quantity is impossible. Of course, the matter that cannot physically convert the impact may be about, but it is necessary to give a rough standard.
[B] The concept of reducing the load (shock amount) of the seat is as follows: The most important thing is how much the seat back cushion (damping factor) and the strength of the seat back frame should be flexed. In addition, how much the cushion amount becomes is also a big factor. : By combining these, the weight equivalent to the lower inertia of the human head and the speed of the movement are reduced. For example, the difference in the delay time between the head and the torso can be reduced and the speed difference can be shortened. It can be understood that the damage to the cervical vertebra etc. connecting the head and torso is considerably reduced. Thus, for example, it is relatively easy to support the head with a headrest (H / R), and the effect is particularly remarkable in combination with active H / R.
[C] Other means for mitigating these impact loads (loads) include, for example, the same as the method of gradually decelerating the transmission of a car from 5th speed to 1st speed. In addition, a certain amount of the seat itself can be operated between the under panel of the vehicle and the seat via a damper moving body (movement of the entire seat) to reduce (attenuate) the load (G) applied to the seat back. : Depending on the matching, the movement of the seat (load amount) will be an important factor in the future depending on where the seat back cushion and seat cushion will sink.

  The above-described movement at the time of impact and load relaxation at the time of impact (impact mitigation) were reliably achieved, and the optimum seat structure for the vehicle was searched from the prior literature.

  Document (1) is “Automobile Seat with Shock Absorbing Seat Back” disclosed in Japanese Patent Application Laid-Open No. 2006-213201. This invention has a flexible constriction on the rear side of the lower arm (based on the running direction). The neck portion is formed, and this constricted portion acts at the time of impact, thereby receiving (buffering) an impact load (load). However, this structure is considered to be only one-time and temporary. In addition, the structure cannot be restored, and there is a possibility of wasting resources. In addition, the present invention is capable of handling a load by a flexible constricted portion provided on the rear side of the lower arm portion, is only a sheet, is a part of load relaxation, and has room for improvement.

  Reference (2) is a “seat structure” disclosed in Japanese Patent Application Laid-Open No. 2004-209017. The present invention includes a torsion bar, a pelvic support member, and a cushion-like planar support portion. Based on the impact on the bar, the movement of the pelvic support member and the cushion-like planar support portion are interlocked to cope with the load. However, in this structure, it works when the pelvic part is pressed deeply against the seat back, so it works correctly when seated, but the position is inaccurate and the physique varies from person to person. Yes, it is not considered to work uniformly. In addition, the present invention is a structure corresponding to the load in conjunction with the movement of the pelvic support member based on the torsion bar and the planar support portion for cushioning, and is only a seat, and part of the load relaxation, There is room for improvement.

  Further, document (3) is a “seat back structure of a vehicle seat” disclosed in Japanese Patent Application Laid-Open No. 2008-18842, and this invention relates to a horizontal / vertical pressure receiving member that functions with a load on a human waist, a support link, The structure is such that the headrest bracket can be moved up and down and tilted forward with the pivot link and the support shaft, and the neck and head are protected during impact. However, in this structure, the headrest bracket is operated by the support link, the rotation link, and the support shaft, and it is difficult to handle the instantaneous movement and the headrest can move up and down and tilt forward. Conceivable. In addition, the present invention is a structure in which the headrest is vertically moved and tilted forward by a horizontal / vertical pressure receiving member, a support link, a rotation link, and the like, and part of the load is relaxed, and there is room for improvement.

  Japanese Patent Application Laid-Open No. 2004-123008 “Shock-absorbing structure of sheet”, in which the present invention includes a lattice-structured shock absorber disposed in a case, and uses the compression of the raid absorber in the event of an impact. It is the structure which aims at the load relaxation with respect to. However, this structure has features such that it can effectively respond to an impact load by acting effectively at the time of impact, and is a structure that returns after impact buffering, so that there is no waste of resources. . In addition, the present invention is a structure in which a lattice-structured shock absorber is provided, which is a partial load relaxation and has room for improvement.

  Further, there is a “vehicle seat” disclosed in Japanese Patent Application Laid-Open No. 2008-105451. In the present invention, an auxiliary headrest (supporting portion) that moves relative to the headrest at the time of a collision is provided on the front side (traveling side) of the headrest. The link mechanism for relative movement is provided between the headrest and the ratchet mechanism (pushing member and stopper groove) is provided in the link mechanism, and the auxiliary headrest advances (relatively moves) by this link mechanism. In this structure, the forward position is supported by a ratchet mechanism. However, this headrest has a complicated structure, which can be difficult to manufacture and may increase costs. Further, it is conceivable that increasing the vehicle load will lead to a decrease in fuel consumption and an increase in CO2. Furthermore, there is a risk of deteriorating the aesthetics of the headrest.

JP 2006-213201 A JP 2004-209017 A JP2008-18842 JP 2004-123008 A JP2008-105451

  The document (1) corresponds to a load by a flexible constriction provided on the rear side of the lower arm part, is only a sheet, and is related to a part of load relaxation, and the document (2) is In conjunction with the movement of the pelvic support member based on the torsion bar and the planar support part for cushioning, it is a structure corresponding to the load, only the seat, and part of the load relaxation. 3) is the vertical and forward tilting structure of the headrest by the horizontal / vertical pressure receiving member, the support link, the rotation link, etc., and is related to partial load relaxation. Reference (4) is a lattice It is a structure in which shock absorbers of the structure are arranged, and it is related to part of load relaxation, all of which are load buffer of individual structure, and it is an invention that leaves a problem where it is not load buffer of the whole structure . Reference (4) shows that the present invention is effective, but has the above-mentioned problems and the like, and cannot be adapted to the recent demand for vehicles.

  In view of the above, the processing intended by the present invention is the following processing.

  1. The impact and this impact load are converted into physical quantities to achieve the purpose. Further, after the impact is absorbed, the sheet device can be restored, and can be reused, thereby eliminating the waste of members (reuse).

  2. This is a comprehensive load buffering pattern in which the seat movement is attempted following the cushioning of the seat cushion and the seat back, and then the headrest is moved up and down and tilted forward by an active headrest action.

  3. The entire sheet device responds to impacts and impact loads.

  The invention of claim 1 has the following objects.

  1. The impact and the impact load are converted into physical quantities to provide means for achieving the object.

  2. Provided is a comprehensive load buffering pattern system in which the seat is moved following the cushioning of the seat cushion and the seatback, and then the headrest is moved up and down and tilted forward by an active headrest action.

  3. The entire sheet apparatus provides an impact and a structure that can cope with the impact load.

According to a first aspect of the present invention, an impact receiving unit provided on a torsion bar of a seat, a seat cushion unit provided on a seat cushion operated by the impact receiving unit, and / or a seat back unit provided on a seat back are provided. The first and second shock absorbing structures;
A third shock absorbing structure which operates after shock absorption by the first and second shock absorbing structures, and which has an impact buffer provided between the seat and the vehicle base;
Up and down (up and down) and forward tilt (upright when lifted) provided on the seat back frame, which operates after impact absorption by the third shock absorbing structure and by impact operation on the impact receiving unit. A fourth shock absorbing structure with a headrest that tilts forward), a headrest with a return prevention mechanism, a headrest with a shock absorbing mechanism, and a fifth shock absorbing structure with a combination thereof The seat device is characterized by controlling the impact constituted by a plurality of stages.

  The invention of claim 2 has the following objects.

  4). A structure of a seat device capable of achieving the same intention as in claim 1 is provided.

  5. In that case, an example of a preferable structure of the shock absorbing means of the sheet itself is provided.

Claim 2 is the seat apparatus according to claim 1,
The seat cushion unit and / or the seat back unit constituting the first and second shock absorbing structures are respectively provided to the impact receiving unit via a connector, and the seat cushion unit and / or The seat back unit is a seat device that is formed of a tongue-shaped plate material or a wire material.

  The invention of claim 3 has the following objects.

  4). A structure of a seat device capable of achieving the same intention as in claim 1 is provided.

  6). In this case, an example of a preferable structure of the shock absorbing device between the seat and the base of the vehicle is provided.

Claim 3 is the seat apparatus according to claim 1,
The shock absorbing device provided between the seat and the vehicle base is characterized by comprising a plurality of flexible supports provided in the unit and a stopper for controlling the flexible supports. It is a sheet device.

  The invention of claim 4 has the following objects.

  4). A structure of a seat device capable of achieving the same intention as in claim 1 is provided.

  7. In that case, an example of a preferable structure of the shock absorbing device of the headrest is provided.

Claim 4 is the seat apparatus according to claim 1,
The headrest that moves up and down (lifts) and tilts forward on the seat back frame of the seat is operated by a lower unit provided on the lower side of the seat back, an upper unit provided on the upper side of the seat back, and the upper unit. And a forward tilting mechanism provided in the upper unit for tilting forward.

The invention of claim 1 includes an impact receiving unit provided on a torsion bar of a seat, a seat cushion unit provided on a seat cushion operated by the impact receiving unit, and / or a seat back unit provided on a seat back. First and second shock absorbing structures;
A third shock absorbing structure that operates after shock absorption by the first and second shock absorbing structures, and that is provided by a shock absorber provided between the seat and the vehicle base;
A fourth shock absorbing structure or an anti-return mechanism by a headrest that is lifted and tilted forward provided on the seat back frame, which operates after the shock is absorbed by the third shock absorbing structure and by an impact operation to the shock receiving unit. Is a seat device characterized by controlling the impact composed of any one of the headrest provided with the above, a headrest provided with an impact absorbing mechanism, and a fifth impact absorbing structure based on a combination thereof in a plurality of stages. .

  Therefore, claim 1 has the following features.

  1. It is possible to provide a means for achieving the purpose by converting the impact and the impact load into a physical quantity.

  2. It is possible to provide a comprehensive load buffering pattern system in which the seat is moved following the cushioning of the seat cushion and the seatback, and then the headrest is moved up and down and tilted forward by the active headrest action.

  3. The entire sheet apparatus can provide an impact and a structure that can cope with the impact load.

The invention of claim 2 is the seat apparatus according to claim 1,
The seat cushion unit and / or the seat back unit constituting the first and second shock absorbing structures are respectively provided to the impact receiving unit via a connector, and the seat cushion unit and / or the seat back are provided. The unit is a sheet device characterized in that it is made of a tongue-shaped plate or wire.

  Therefore, claim 2 has the following characteristics.

  4). It is possible to provide the structure of the seat apparatus that can achieve the same intention as in the first aspect.

  5. In that case, an example of a preferable structure of the shock absorbing means of the sheet itself can be provided.

The invention of claim 3 is the seat apparatus according to claim 1,
A shock absorber provided between a seat and a vehicle base is composed of a flexible support provided in a unit and a stopper for controlling the flexible support. It is.

  Therefore, claim 3 has the following characteristics.

  4). It is possible to provide the structure of the seat apparatus that can achieve the same intention as in the first aspect.

  6). In that case, an example of a preferable structure of the shock absorbing device between the seat and the base of the vehicle can be provided.

The invention of claim 4 is the seat device according to claim 1,
The headrest, which is provided on the seat back frame of the seat and moves up and down and tilts forward, includes a lower unit provided on the lower side of the seat back, an upper unit provided on the upper side of the seat back, and a connecting body that operates the upper unit A seat device comprising a forward tilt mechanism provided in an upper unit that tilts forward.

  Therefore, claim 4 has the following characteristics.

  4). It is possible to provide the structure of the seat apparatus that can achieve the same intention as in the first aspect.

  7. In that case, an example of a preferable structure of the shock absorbing device for the headrest can be provided.

A schematic view of the interior of the vehicle Schematic diagram of the seated state Schematic showing an example of the internal structure of the seat A perspective view schematically showing an example of the internal structure of the seat Conceptual diagram of the normal state showing an example of impact absorbing means (impact absorbing device) for controlling the seat cushion unit and seat back unit of the seat The conceptual diagram of the state at the time of the deformation | transformation of this seat cushion which showed an example of the impact-absorbing means of FIGS. 5-1 is a conceptual diagram of a state when the seat back is deformed, showing an example of the impact absorbing means of FIG. Enlarged cross-sectional view of the normal state provided on the seat and floor as an example of shock absorber 6-1 Top view of the shock absorber shown in FIG. FIG. 6A is a side view of the state where the shock absorbing device is bent at the time of impact. It is another example of an impact shock absorber, and is an enlarged sectional view of a normal state provided on the seat and the floor surface Plan view of the shock absorbing device of FIG. FIG. 7A is a plan view of the state where the shock absorbing device is bent at the time of impact. Side surface schematic diagram showing an example of a structure that absorbs sheet impact using compression (absorption) of the impact absorbing mechanism It is an example of the flexible support body of the shock absorbing device, and is a reference enlarged schematic diagram in a normal state and a bent state. It is another example of the flexible support body of the shock absorbing device, and is a reference enlarged schematic diagram in a normal state and a bent state. Front view showing an example of a headrest device and a structure that can move up and down and tilt forward Side view showing the normal state of the headrest shown in FIG. Side view showing rising of headrest and forward tilt shown in FIG. 9-1 is an enlarged side schematic view of the main part showing the headrest rise and forward tilt shown in FIG. Enlarged sectional view of the headrest with return prevention mechanism FIG. 10-1 is a partially missing front view of the headrest provided with the return prevention mechanism of FIG. Expanded cross-sectional view of a headrest equipped with a shock absorption return prevention mechanism Enlarged front view of the headrest intended to physically achieve shock absorption Side view of the dummy doll and seat device at normal times, with no deformation of the seat, no movement of the seat, and the headrest in a normal state Side view of the dummy doll and seat device at the time of the first impact, in which the seat cushion is sunk, the seat back is not sunk, the seat is not moved, and the headrest is in a normal state Side view of the dummy doll and seat device at the time of the second impact, with the seat cushion and seat back sinking, no movement of the seat, and the headrest in the normal state Side view of the dummy doll and seat device at the time of the third impact, the seat cushion and seat back both sinking, the seat moves, and the headrest is in the normal state Side view schematically showing the dummy doll and seat device at the time of the fourth impact, the seat cushion and seat back both sinking, the seat moving, and the headrest rising and leaning forward The procedure for achieving the objective by converting the impact load into a physical quantity is a chart, and shows the steps in FIGS. 11-1 to 11-5 step by step. Each action that achieves the purpose by converting it into a physical quantity with respect to the impact load is a chart, and shows the selected function of each impact absorbing element A diagram that shows the absorption element and the directionality of the absorption element against the impact load as a list chart

  1 to 5-3, reference numeral 1 denotes a sheet that can be reused. This sheet 1 is an impact buffering device B described later provided between the sheet 1 and a floor surface C1 (base) of the vehicle body C. It is provided so as to be movable (moving at the time of impact, and is made to move back and forth, up and down, or left and right). The seat 1 includes a seat cushion 100 and a seat back 101, and a torsion bar 2 penetrating in the width direction of the seat 1 at a connecting portion between the seat cushion 100 and the seat back 101, and the torsion bar 2 Curved plate-shaped impact receiving units 3 provided in the are respectively provided. Then, one end 3a on the traveling side of the impact receiving unit 3 is provided in the seat cushion 100 (configured with a tongue-like plate material or a tongue-shaped outer wire and embedded structure). The other end 3b on the retreat side of the impact receiving unit 3 is connected to the seat back 101 (configured with a tongue-shaped plate material or a tongue-shaped outer body wire and embedded structure). The seat back unit 101a is connected. Therefore, when there is a first impact, one end 3a of the impact receiving unit 3 moves counterclockwise (arrow A) with the torsion bar 2 as a fulcrum 300, and the seat cushion unit 100a moves downward (floor surface C1). ) To move (arrow b). The seat cushion 100 sinks through the downward movement of the seat cushion unit 100a (see FIGS. 5-2 and 11-2). At this time, the other end 3b of the impact receiving unit 3 is moved clockwise (arrow C) with the torsion bar 2 as a fulcrum 300, and the seat back unit 101a is moved toward the traveling side (arrow D). The seat back unit 101a is movable toward the traveling side, and can contribute to the suppression of the climbing of the person H. Thereafter, when there is a second impact, the other end 3b of the impact receiving unit 3 moves in the clockwise direction (arrow E) with the torsion bar 2 as a fulcrum 300, and the seat back unit 101a moves backward (vehicle C Move toward the back side) (to the arrow). The seat back 101 sinks through the downward movement of the seat back unit 101a (see FIGS. 5-3 and 11-3). The first impact and the second impact are absorbed by the sinking of the seat cushion 100 and the seat back 101 (impact buffering means A). In the drawing, reference numeral 5 denotes one end 3a of the impact receiving unit 3 and a connecting tool for the seat cushion unit 100a, and reference numeral 6 denotes a connecting tool for the other end 3b of the shock receiving unit 3 and the seat back unit 101a. It is.

  In FIGS. 6-1 to 8-2, B is an impact absorbing device that can be reused if necessary. This impact absorbing device B is provided between the sheet 1 and the floor C1, and in principle, the sheet 1 Are provided at the four corners (one example, one or several). The shock absorbing device B includes, for example, a unit 10 that includes a plate-shaped pair of flanges 1000 having a plurality of mounting holes 1000a, and that presents a box that opens an upper surface 1001 (having a window portion 1001a); The unit 10 is constituted by a flexible support 11 having a flexure piece 1100 (Ameber mechanism) and a stopper 1101 for regulating the flexure. The unit 10 is attached to the floor C1 via a stopper 12 inserted into the hole 1000a, and the sheet 1 is attached via a stopper 13 inserted into a hole 1001b provided on the upper surface 1001. It is a structure to install. The impact absorbing device B functions when a third impact occurs, and the sheet 1 moves in the backward direction (arrow g). When the third impact occurs, the bending piece 1100 acts to bend and act as a stopper 1101 that regulates the bending, and a predetermined bending allowance is obtained, and the impact load is absorbed by the bending of the unit 10. The shape of the flexible support 11 is not particularly specified, but it may be one example shown in FIGS. 6-1 to 6-3 and another example shown in FIGS. 7-1 to 7-3. Can be considered as a suitable example. In any case, as long as the flexible support 11 acts, the shape, material, density, etc. are not limited. FIG. 8A and FIG. 8B are schematic views showing the bending state of the bending piece 1100 of the flexible support 11. Then, as shown in FIG. 7-4, the shock absorber B is provided with the seat 1 so as to be movable along the seat rail 15, and a support rod 1500 provided on the seat rail 15 (separated from the concave portion of the floor surface C1). Provided with a lower surface) is movably provided on a horizontal bar 16 provided in a recess of the floor surface C1, and an impact absorbing mechanism 17 such as a spring or an actuator provided on the horizontal bar 16 is connected to the support bar 1500 and the floor surface. A structure provided between the inner surface of the concave portion of C1 and a structure that absorbs the impact received by the seat 1 and / or the person H by using the compression (absorption) of the impact absorbing mechanism 17 when there is an impact. It is also possible to do.

  In FIGS. 9-1 to 9-4, D is an active headrest that can be reused. This active headrest D is provided on the frame 20 that supports the seat back 101, and the impact receiving device is used during the fourth impact. A lower unit 21 that operates via the stop piece unit 3 (normally, in a state in which the first and second shock absorption cannot be absorbed automatically), and a tension (not shown) of the lower unit 21 An upper unit 23 (raising a headrest support described later) provided on the frame 20 connected via a connecting means 22 such as a loosening means, a wire, and a string; a support bracket 24 provided on the frame 20; The upper part of the guide plate 26 having the inclined long hole 2600 provided in the frame 20 and the upper end of the support bracket 24 are pivotally attached. A receiving piece 28 whose lower part is movable (movable with the upper part as a fulcrum), and a protrusion 3000 that is held by the receiving piece 28 and loosely fitted in the inclined long hole 2600 of the guide piece 26 (connected to the connecting body 22). The headrest bracket 30, the headrest support 31 provided on the headrest bracket 30, the stay 32 provided on the headrest support 31, and the headrest 33 provided on the stay 32. Constitute. Accordingly, when the fourth impact occurs, the lower unit 21 operates from the state of FIGS. 9-1 and 9-2, and the connecting body 22 connected to the lower unit 21 is pulled. However, the headrest port 31 is pulled upward (in an arrow) sequentially (instantly) by pulling up the folded portion of the coupling body 22 via the pulley. By this pulling up, the protrusion 3000 provided at the lower end of the headrest bracket 30 ascends the inclined long hole 2600, and the upper end of the headrest bracket 30 swings toward the inside of the seat 1 as this rises. By swinging of the headrest bracket 30, the upper end of the receiving piece 28 is pressed toward the inside of the seat 1, and substantially the entire receiving piece 28 is pivoted from the state of the substantially vertical direction (arrow N). Swing in a cantilevered manner (with arrow points). By the swinging of the receiving piece 28, the headrest bracket 30 to be held is tilted forward (instantly) and forward (similarly, arrow h). Then, the headrest support 31, the stay 32, and the headrest 33 are lifted and tilted forward through the pulling up by the connecting body 22 and the forward tilting (FIG. 9-3). This rise and forward tilt absorb the fourth impact (forward tilt mechanism). The headrest 33 is lowered and returned (return of the receiving piece 28 in the substantially vertical direction) by pushing down the headrest support 31 and the stay 32 and the headrest 33 and pulling the connecting body 22 to the lower unit 21. By returning, it returns to the initial state and can be used again. The forward tilting mechanism includes the support bracket 24, the receiving piece 28 pivotally attached to the support bracket 24, the guide piece 26, and the holding piece 28 that is held up and lifted forward. The headrest bracket 30 which inclines is made into a main structure.

  In FIG. 10-1 to FIG. 10-4, D1 is an impact-capable active headrest (referred to as a fifth impact-capturing active D1 for absorbing shock) that can be reused. 10-1 and FIG. 10-2 are structures provided with a return prevention mechanism. When the headrest 33-1 is retracted (when the second impact is absorbed by the seat back 101), the headrest 33-1 is shown. A part of the rising side surface of the stay 32 (all are possible, the same applies hereinafter) is defined as a rising portion 3200 having flexibility, and a ratchet recess 32a is provided on the front side (running side) of the rising portion 3200. This is a structure in which the stay 32 is provided with a flexible locking body 40 provided with a ratchet pawl piece 40a that engages with the recess 32a, and when the rising portion 3200 is bent at the time of impact. Claws 40a of the flexible locking member 40 is a structure to be locked in the recess 32a, usually located below the time. Note that the amount of bending of the rising portion 3200 is larger than the amount of bending of the stay 32 at the time of the impact. Reference numeral 41 in the figure denotes an unlocking member that opens the locking relationship. Further, FIG. 10-3 is a structure provided with a shock absorption return prevention mechanism. When the headrest 33-2 is tilted forward, a part of the rising side surface of the stay 32 of the headrest 33-1 is given flexibility. A flexible locking body including a raised portion 3200, a ratchet recess 32a provided on the rear side (retracted side) of the raised portion 3200, and a ratchet claw piece 40a engaged with the recessed portion 32a. 40 is provided on the stay 32, and when the rising portion 3200 bends forward and bends at the time of impact, the flexible locking body 40 is also bent, but is larger and the rising portion 3200 is bent. In this case, the claw piece 40a of the flexible locking body 40 is locked to the concave portion 32a positioned higher than normal. This is a structure that covers the state of bending at the time of forward tilting (bending at the time of impact) with the total no physical quantity of the rising portion 3200 and the flexible locking body 40. Others conform to the structure shown in FIG. Further, although not shown, the deflection when the headrest 33-2 is retracted can be used as in the example of FIG. 10-1. FIG. 10-4 is a headrest 33-3 intended to physically achieve shock absorption, and has a structure with rigidity to withstand shock absorption. The stay 32 has a structure in which a reinforcement rod (not shown) is fitted. In the first to fourth shock absorption, the fifth shock absorption functions when the shock corresponding active D1 fails to absorb the shock. However, this fifth shock absorption is special, and even if one shock absorption selected from the first to fourth shock absorptions and the fifth shock absorption function together (for example, (The second shock absorption and the fifth shock absorption are used together, or the fourth shock absorption and the fifth shock absorption are used together). Although not shown in the drawings, the structures shown in FIGS. 10-1, 10-3, and 10-4 are selectively used together (FIGS. 10-1, 10-3, and 10-1). 10-4 etc.), or a structure in which FIGS. 10-1 to 10-4 are integrated.

  Therefore, based on FIG. 11-1 to FIG. 11-5 and FIG. 12, the load amount of the seat 1 from the first impact to the fourth impact is reduced, and this overweight is converted into a physical quantity. Now, explain that it is possible to deal with all impacts. FIG. 11A shows the relationship between the normal sheet 1 and the dummy person. In this state, as shown in FIG. 11B, when a first impact occurs, the first impact load absorbed by the seat cushion 100 via the torsion bar 2 and the seat cushion unit 100a is Convert to physical quantity to absorb (accept) impact. If the first impact cannot be absorbed, then the second impact shown in FIG. 11C is obtained, and the seat back 101 absorbs via the torsion bar 2 and the seat back unit 101a. The second impact load is converted into a physical quantity to absorb the impact. This first and second shock absorption (in the figure, the chain line is the state before shock absorption, the solid line is the first and second shock absorption), the conventional sheet (not shown), and the amount of deformation Although it is not different, the seat cushion unit 100a and the seat back unit 101a are instantly and reliably absorbed by the respective depression of the seat cushion 100 and / or the seat back 101. .

  If the first and second shock absorptions cannot absorb the shock at this time, the third shock shown in FIG. 11-4 is used, and the shock absorbing devices B provided at the four corners of the sheet 1 are installed. This third shock is absorbed through. Specifically, the sheet 1 is absorbed by moving in the backward direction by the flexible support 11 having the bending piece 1100 provided in the unit 10 and the stopper 1101 for restricting the bending. Thereby, it differs greatly from the conventional fixed seat structure, and the difference (E) is formed as shown in FIG. In addition, a seat device that is safe and has a structure that can cope with an impact load and that is beneficial to the health and life of the person H can be provided.

  Finally, when the first, second, and third shock absorptions cannot absorb the shock at this time, the fourth shock shown in FIG. 11-5 is generated, and this fourth shock is passed through the active headrest D. To absorb the shock of. Specifically, when the connecting body 22 connected to the lower unit 21 is pulled and the headrest port 31 is sequentially pulled upward, the protrusion 3000 provided at the lower end of the headrest bracket 30 causes the inclined elongated hole 2600 to The upper end of the receiving piece 28 is pressed to the inside of the sheet 1 by the rising. By this pressing, the receiving piece 28 swings and tilts forward from a substantially vertical state with the upper pivot point as a fulcrum. Accordingly, the headrest bracket 30 held by the receiving piece 28 sequentially tilts forward. The headrest support 31, the stay 32, and the headrest 33 are lifted and tilted forward through the pulling up by the connecting body 22 and the forward tilt, thereby absorbing the fourth impact. As a result, the conventional fixed headrest device is greatly different, and as shown in FIG. 12, the difference (F) is formed, so that the effect of the fourth shock absorption is remarkably exhibited, and the entire seat device is formed. As shown in the overall difference (E + F = G), the seat device is friendly to the person H, safe and capable of handling the impact load, and can provide a seat device useful for the health and life of the person H. As shown in the figure, the features of the present invention are that the first, second, and third shock absorptions act in a superimposed manner (the first, second, and third shock absorptions in the lateral direction are The maximum characteristic is the indicated deformation amount (a) to deformation amount (c), and as a result, the fourth shock absorption is the deformation amount (d), the first and second・ Superior effect is achieved by superimposing with the third shock absorption. In addition to the first to fourth shock absorptions, the fifth shock absorption by the shock corresponding active D1 shown in FIGS. 10-1 to 10-4 is effective.

  In addition, in the figure which made the list of the absorption element and the directivity of the absorption element, etc. with respect to the impact load shown in FIG. 14, the vertical axis indicates the seat cushion 100 that is the absorption element, the seat back 101, and The movement of the seat 1, the headrest 33, or the headrest 33-1 having a return prevention mechanism, the headrest 33-2 having an impact absorption mechanism, and the headrest 33-3 having physical rigidity, The fifth shock absorbing structure by any one of the combination mechanisms is shown, and the horizontal axis indicates the direction of the absorbing element of the shock load, etc. as an example on the basis of the floor surface C1 of the seat 1. It has been shown that it is helpful in understanding the present invention and in the diversity of effects. And, the present invention uses the common parts of the shock absorbing means A and the active headrest D, and the common parts of the conventional vehicle C and the shock absorbing device B to simplify the structure. There is an advantage that the impact load on the vehicle C can be absorbed almost completely by achieving cost reduction, or by systematizing these comprehensive linkages and controls in order. In the present invention, it is also possible to absorb, for example, left and right impact loads by utilizing the shaking of the body of the person H (the shaking of the head and shoulders).

1 sheet
100 seat cushion
100a Seat cushion unit
101 seat back
101a Seat back unit
101b fulcrum
2 Torsion bar
3 Shock receiving unit
300 fulcrum
3a one end
3b The other end
5 couplings
6 Connecting tools
10 units
1000 pieces
1000a hole
1001 Top surface
1001a Window
1001b hole
11 Flexible support
1100 Deflection piece
1101 Stopper
12 Stopper
13 Stopper
15 Seat rail
1500 support rod
16 Yokohama
17 Shock absorption mechanism
20 frames
21 Lower unit
22 Linkage
23 Upper unit
24 Support bracket
26 Guide piece
2600 inclined long hole
28 Receiving piece
30 Headrest bracket
3000 protrusions
31 Headrest support
32 stays
32-1 Stay
32a recess
3200 Rise site
33 Headrest
33-1 Headrest
33-2 Headrest
33-3 Headrest
40 Locking body
40a Nail pieces
41 Unlock member
A Shock absorption means
B Shock absorber
C vehicle
C1 floor
D active headrest
D1 Impact active headrest
E difference
F difference
G difference
H people

Claims (4)

First and second by an impact receiving unit provided on a seat torsion bar, a seat cushion unit provided on a seat cushion operated by the impact receiving unit, and / or a seat back unit provided on a seat back. Shock absorbing structure,
A third shock absorbing structure which operates after shock absorption by the first and second shock absorbing structures, and which has an impact buffer provided between the seat and the vehicle base;
A fourth shock absorbing structure by a headrest that is lifted and tilted forward provided on the seat back frame, which is operated after the shock is absorbed by the third shock absorbing structure and by an impact operation to the shock receiving unit, or a return A seat characterized by controlling the impact composed of a headrest having a prevention mechanism, a headrest having an impact absorption mechanism, and a fifth impact absorption structure by a combination mechanism thereof in a plurality of stages. apparatus. The seat device according to claim 1,
The seat cushion unit and / or the seat back unit constituting the first and second shock absorbing structures are respectively provided to the impact receiving unit via a connector, and the seat cushion unit and / or The seat back unit is formed of a tongue-like plate material or a wire material. The seat device according to claim 1,
The shock absorbing device provided between the seat and the vehicle base is characterized by comprising a plurality of flexible supports provided in the unit and a stopper for controlling the flexible supports. Sheet device. The seat device according to claim 1,
The headrest that is provided on the seat back frame of the seat and moves up and down and tilts forward includes a lower unit provided on the lower side of the seat back, an upper unit provided on the upper side of the seat back, and a connecting body that operates the upper unit. And a forward tilt mechanism provided in the upper unit for tilting forward.

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