JP5689715B2 - Sheet - Google Patents

Description

  In the present invention, when an occupant (passenger or person such as a driver / passenger) is seated at an offset position from the seat center (mainly a rear collision), or at the time of another impact (referred to as a collision). , Relating to a seat for protecting passengers.

  Conventionally, active headrests (headrest tilting / lifting devices, etc.) and mobile seats (seat advancement / retraction, lifting devices, etc.) are used as devices for protecting passengers in the event of a collision. Etc. are known.

  However, as shown in the literature (1), before the collision (prediction stage), hold the occupant (occupant) torso, restrain the intended movement of the occupant, and after avoiding the accident Has proposed a so-called occupant restraint device that returns to an initial predetermined state. The present invention is a “ride restraint device” disclosed in Japanese Patent Application Laid-Open No. 2008-302804. The gist is a structure that restrains an occupant via a bolster and an air bag actuator provided on both sides of the seat back. The bolster and the air bag actuator are provided with a sensor and a drive mechanism for detecting a prediction of a collision. It is characterized by controlling via.

  In addition, as shown in Reference (2) and Reference (3), side backs are provided on both sides of the seat back so that they can be moved in and out, and at the time of a collision, both sides of the occupant are protected by the side back. There is a structure to do. For example, “industrial vehicle occupant protection device” disclosed in Japanese Utility Model Publication No. 61-37053 and “vehicle seat” disclosed in Japanese Patent Application Laid-Open No. 2005-335458. The gist of the invention is that the side back protrudes with a drive mechanism at the time of a collision and protects both sides of the occupant.

  Furthermore, there is a structure shown in the literature (4) in which the seat back is depressed at the time of collision to protect the occupant. For example, Japanese Unexamined Patent Application Publication No. 2009-202757 “Automobile Seat Structure”. The gist thereof is a structure in which a projecting piece is provided on both side portions of the seat back frame to provide a sinking space portion to the seat back.

  Next, when the related document (5) and the document (6) that is somewhat common in the movement of the seat back frame and the side frame in different fields are shown, this document (5) -296266 “Vehicle seat”. The gist is that the rear side of the seat is enlarged by using a sensor and a plurality of actuators at the time of rear-end collision to ensure the rear displacement of the passenger shoulder and the amount of displacement of the passenger shoulder and head. It is intended to reduce and reduce the load on the neck. Reference (6) is a “chair” disclosed in JP-A-2005-124832. The summary is that the center part of the backrest part is transformed into a depressed state using a physical structure, and the side support part is moved forward, so that the seated person's physique and the desired posture / working situation And intended to gently wrap the back of the occupant.

JP2008-302804A Japanese Utility Model Sho 61-37053 JP-A-2005-335458 JP 2009-202757 A JP-A-2005-296266 JP 2005-124832 A

  Documents (1) to (4) are structures that control the backrest of the seat back and the side frame of the seat back in conjunction with each other or individually control them. Therefore, it is not sufficient as a safety measure for rear collision when the occupant is seated at an offset position from the seat center. Further, it is a safety measure at the position where the user is seated on the seat, and assumes a stationary state, which is theoretically problematic.

  In view of the above, the present invention is to reliably protect the occupant when the occupant is seated at an offset position from the seat center, that is, during actual driving. The load that spreads the side frame directly to the outside with the impact load of, and the spring or lumbar support (spring) made of an elastic member are sequentially deformed from the bulging shape, and finally pushed backward. Due to this, the process leads to a depressed shape. When this is reflected on the side frame, the side frame is initially spread outward, the occupant is guided to the seat (to make it easier to enter), and then is depressed, thereby holding and protecting the occupant. At the same time, the depressed state is repelled inward and a load to return the side frame is exerted. As a result, the spring is returned to the original state, the side frame returns to the inner side from the outer side, and The side frame and the seat back frame return to the initial position, and the occupant returns to the offset position.

  Further, according to the present invention, the spring has a numerical value required to spread outward (in the width direction of the seat back) with an arbitrary spring constant, widen the side frame, guide the occupant, or absorb the impact. .

  The invention of claim 1 ensures that the occupant is protected at the rear collision (impact of front collision, side collision, etc.) when the occupant is seated at a predetermined position at the center of the seat or at an offset position from the center. Intended. For example, the occupant deforms the load that spreads the side frame directly outward and the spring or lumbar support sequentially from the bulging shape by the impact load of the rear impact, and finally collapses by pushing backward We propose a structure that leads to shape. In the invention of claim 1, the spring or the lumbar support is provided with numerical values required to expand outward with an arbitrary spring constant, expand the side frame, guide the occupant, or absorb the impact. I intend to.

Claim 1 is a vehicle seat constituted by a spring or a lumbar support made of an elastic member provided on a seat back of the seat, and a side frame of the seat connected to the spring or the lumbar support.
The spring or the lumbar support is in contact with the back of the occupant, in a normal state, it bulges in the traveling direction in plan view, and at the time of an impact load, a bulging plate portion having a structure that changes so as to be recessed in the opposite traveling direction; The bulging plate portion is composed of bending plate portions provided at both ends of the bulging plate portion, and left and right bent plate portions connected to the respective bending plate portions. A plurality of springs or lumbar supports are provided on the seat back frame of the seat, and both free ends of the left and right bent plate portions of the spring or lumbar support are used as a base point and a configuration bent in the traveling direction. These are vehicle seats configured to be connected to the inside of the side frame formed of a triangular spring plate in plan view .

The invention of claim 2 proposes the shape and structure of the seat back frame that achieves the intention of claim 1 and is optimal for achieving the intention.

Claim 2 is the vehicle seat according to claim 1 ,
The seat back frame of the seat, constituted by the side frame and the upper frame, the upper frame is configured to allow scaling in the vehicle width direction and the vehicle height direction, the side frame is freely movable in the upper frame This is a vehicle seat having a configuration.

The invention of claim 3 proposes a structure of a side frame and a spring or lumbar support that achieves the intention of claim 1 and is optimal for achieving this intention.

Claim 3 is the vehicle seat according to claim 1 ,
The spring, or a cooperative locking piece provided on the left and right bent plate portions of the lumbar support, also on the inside edges facing inward of the side frame, the cooperative locking hole of the cooperative locking member is locked It is the seat of the vehicle made into the structure which provides this.

The invention of claim 4 proposes a structure of a side frame that achieves the intention of claim 1 and is optimal for achieving this intention.

Claim 4 is the vehicle seat according to claim 1 ,
Scaling function of the side frame, the spring, or lateral movement of the ends of the bulging plate portion of the lumbar support, and / or composed in the spring, or scaled changes in the left and right bent plate portions of the lumbar support arrangement This is the vehicle seat.

The invention of claim 5 is intended to reliably protect the occupant at the rear collision when the occupant is seated at a predetermined position at the center of the seat or at an offset position from the center. For example, the load that spreads the side frame directly to the outside by the impact load of the rear impact, and the spring is deformed sequentially from the bulging shape, and finally it is pushed back to reach the collapsed shape We propose the following structure. Further, the invention of claim 6 intends that the spring has a numerical value necessary to spread outward with an arbitrary spring constant, widen the side frame, guide the passenger to enter, or absorb the impact. .

Claim 5 is the vehicle seat according to claim 1 ,
The expansion / contraction function of the side frame is a vehicle seat having a configuration in which the front portion of the side frame is changed and / or the inner depression is formed.

The invention of claim 6 proposes a vehicle seat that achieves the intent of claim 1 and uses the operation of the seat back frame to exhibit the characteristics as an active headrest.

Claim 6 is the vehicle seat according to claim 2 ,
The upper frame, thereby enabling scaling in the vehicle width direction and the vehicle height direction, the upper frame, in a configuration in which a freely movable on the side frame, the seat back frame, and / or, the spring, or the lumbar A vehicle seat configured to be operable with an impact plate provided between the support and the support.

The invention of claim 1 is a vehicle seat constituted by a spring or lumbar support made of an elastic member provided on the seat back of the seat, and a side frame of the seat linked to the spring or lumbar support.
The spring or lumbar support is in contact with the occupant's back. In normal times, the spring or lumbar support bulges in the traveling direction in plan view, and when impact is applied, the bulging plate portion changes so as to be recessed in the anti-traveling direction. Consists of flexure plate portions provided at both ends of the exit plate portion, and left and right bent plate portions connected to each flexure plate portion, and the left and right bent plate portions travel from both ends of the bulge plate portion as a base point A plurality of springs or lumbar supports are provided on the seat back frame of the seat, and both free ends of the left and right bent plates of the spring or lumbar support are triangular in plan view. It is a vehicle seat configured to be connected to the inside of a side frame formed of a spring plate .

  Accordingly, the first aspect of the present invention has a feature that the occupant can be reliably protected at the rear collision when the occupant is seated at a predetermined position of the seat center or at an offset position from the center. For example, the occupant deforms the load that spreads the side frame directly outward and the spring or lumbar support sequentially from the bulging shape by the impact load of the rear impact, and finally collapses by pushing backward It is possible to propose a structure that leads to a shape. Further, in the first aspect of the present invention, the spring or the lumbar support is provided with numerical values necessary to spread outward with an arbitrary spring constant, to widen the side frame, to guide the occupant, or to absorb the impact. And

According to a second aspect of the present invention, in the vehicle seat according to the first aspect,
The seat back frame of the seat is composed of an upper frame and a side frame, and the upper frame can be expanded and contracted in the vehicle width direction and the vehicle height direction, and the side frame is configured to be movable to the upper frame. It is a sheet.

Accordingly, the second aspect has features such that the intention of the first aspect can be achieved, and the shape and structure of the seat back frame that is optimal for achieving the intention can be proposed.

Claim 3 is the vehicle seat according to claim 1 ,
It is configured to provide a connection locking piece on the left or right bent plate portion of the spring or lumbar support, and to provide a connected locking hole on the inner side which is the inner side of the side frame to lock the connection locking piece. A vehicle seat.

Accordingly, the third aspect has features such that the intent of the first aspect can be achieved, a spring or lumbar support, and the shape and structure of the side frame can be proposed which are optimal for achieving the intent.

A fourth aspect of the present invention, in the vehicle seat according to claim 1,
The side frame expansion / contraction function is a vehicle seat having a configuration in which both ends of the bulging plate portion of the spring or lumbar support are moved left and right and / or the left and right bent plate portions of the spring or lumbar support are expanded / contracted. It is.

Therefore, claim 4 has features such that the intention of claim 1 can be achieved, and a structure of a side frame that is optimal for achieving the intention can be proposed.

The invention of claim 5 is the vehicle seat according to claim 1,
The expansion / contraction function of the side frame is a vehicle seat having a configuration in which the front portion of the side frame is changed and / or the inner depression is formed.

Accordingly, the fifth aspect of the present invention has a feature that the occupant can be reliably protected at the rear collision when the occupant is seated at a predetermined position at the center of the seat or at an offset position from the center. For example, the load that spreads the side frame directly to the outside by the impact load of the rear impact, and the spring is deformed sequentially from the bulging shape, and finally it is pushed back to reach the collapsed shape A structure can be proposed. According to a sixth aspect of the present invention, the spring has a numerical value required to expand outward with an arbitrary spring constant, expand the side frame, guide the occupant, or absorb an impact.

The invention of claim 6 is the vehicle seat according to claim 2 ,
Provided between the seat back frame and / or the spring or lumbar support in a configuration in which the upper frame can be expanded and contracted in the vehicle width direction and the vehicle height direction, and the upper frame is movable to the side frame. The vehicle seat is configured to be operable with a shock plate.

Therefore, claim 6 has the advantage that the intention of claim 1 can be achieved, and a vehicle seat that can exhibit the characteristics of an active headrest can be proposed by utilizing the operation of the seat back frame.

Scale drawing showing the entire sheet Schematic diagram explaining the relationship between conventional seats and passengers Schematic diagram explaining the relationship between the seat and the occupant at the time of a conventional front collision Schematic diagram explaining the relationship between the seat and occupant at the time of a conventional rear impact A schematic plan view schematically showing an occupant seated at the center of the seat A schematic plan view schematically showing the state in which the occupant seated at the center of the seat changes in the impact load, for example, in the first to sixth six stages, with the spring (lumbar support) and the side frame (side back). Figure A schematic plan view showing a state in which the spring and the side frame change at the first stage in FIG. A schematic plan view showing a state in which the spring and the side frame change at the second stage in FIG. A schematic plan view showing a state in which the spring and the side frame change at the third stage in FIG. A schematic plan view showing a state in which the spring and the side frame change in an impact load, for example, in the fourth stage in FIG. 3-2. A schematic plan view showing a state in which the spring and the side frame change in an impact load, for example, at the fifth stage in FIG. 3-2. A schematic plan view showing a state in which the spring and the side frame change at the sixth stage in FIG. A schematic plan view schematically showing an occupant (occupant) sitting at an offset from the center of the seat The state in which the occupant seated with the spring (lumbar support) and side frame (side back) offset from the center of the seat changes in impact load, for example, in the first to sixth stages is schematically shown. Schematic plan view A schematic plan view showing a state in which the spring and the side frame change at the first stage in FIG. A schematic plan view showing a state in which the spring and the side frame change at the second stage in FIG. A schematic plan view showing a state in which the spring and the side frame change in an impact load, for example, in the third stage in FIG. A schematic plan view showing a state in which the spring and the side frame change in the fourth stage in FIG. A schematic plan view showing a state in which the spring and the side frame change at the fifth stage in FIG. A schematic plan view showing a state in which the spring and the side frame change at the sixth stage in FIG. An enlarged cross-sectional view showing the state before connection in the first example of the connection relationship between the free end of the spring and the inner side of the side frame An enlarged cross-sectional view showing the connection state in the first example of the connection relationship between the free end of the spring and the inner side of the side frame An enlarged cross-sectional view showing the state of connection completion in the first example of the connection relationship between the free end of the spring and the inner side of the side frame An enlarged sectional view showing a state before connection in the second example of the connection relationship between the free end of the spring and the inner side of the side frame. Enlarged sectional view showing the connection state in the second example of the connection relationship between the free end of the spring and the inner side of the side frame Enlarged cross-sectional view showing the connection completion in the second example of the connection relationship between the free end of the spring and the inner side of the side frame Fig. 7-2-3 Plan view An enlarged sectional view showing a state before connection in the third example of the connection relationship between the free end of the spring and the inner side of the side frame. An enlarged cross-sectional view showing the connection state in the third example of the connection relationship between the free end of the spring and the inner side of the side frame Enlarged cross-sectional view showing the connection completion in the third example of the connection relationship between the free end of the spring and the inner side of the side frame 7-3-3 plan view An enlarged sectional view showing the state before connection in the fourth example of the connection relationship between the free end of the spring and the inner side of the side frame. An enlarged sectional view showing the connection state in the fourth example of the connection relationship between the free end of the spring and the inner side of the side frame. An enlarged sectional view showing the state of completion of connection in the fourth example of the connection relationship between the free end of the spring and the inner side of the side frame. An enlarged sectional view showing the state before connection in the fifth example of the connection relationship between the free end of the spring and the inner side of the side frame. Enlarged sectional view showing the connection state in the fifth example of the connection relationship between the free end of the spring and the inner side of the side frame Enlarged cross-sectional view showing the state of connection completion in the fifth example of the connection relationship between the free end of the spring and the inner side of the side frame An enlarged sectional view showing the state before connection in the sixth example of the connection relationship between the free end of the spring and the inner side of the side frame. Enlarged sectional view showing the connection state in the sixth example of the connection relationship between the free end of the spring and the inner side of the side frame An enlarged cross-sectional view showing the connection completion state in the sixth example of the connection relationship between the free end of the spring and the inner side of the side frame Fig. 7-6-3 Plan view An enlarged sectional view showing the state before connection in the seventh example of the connection relationship between the free end of the spring and the inner side of the side frame. An enlarged cross-sectional view showing the connection state in the seventh example of the connection relationship between the free end of the spring and the inner side of the side frame An enlarged cross-sectional view showing the connection completion state in the seventh example of the connection relationship between the free end of the spring and the inner side of the side frame. Main section enlarged cross-sectional schematic diagram showing the relationship between the upper frame, side frame, and lumbar support AA sectional view of FIG. 8-1-1 BB sectional view of Fig. 8-1-1 CC sectional view of FIG. 8-1-1 DD sectional view of FIG. 8-1-1 EE sectional view of FIG. 8-1-1 Fig. 8-1-1 Schematic cross-sectional view of F Fig. 8-1-1 example of an enlarged cross-sectional view of the main part, provided symmetrically on the left and right and omitting a part thereof Cross-sectional schematic diagram showing another example of the connection relationship between the side frame and the lumbar support FIG. 8A is a table showing an example of a preferable relationship such as the combination of the shape of the upper and lower lumbar supports in the embodiment of FIG. 8-1-1 and the combination of the lumbar support and the impact plate. The chart which showed an example of the desirable relationship between the stopper which connects the 2nd connection frame and the lumbar support in the example of Drawing 8-1-1, and a long hole Fig. 8-1-1 is an example of a further expanded cross-sectional view showing the relationship between the upper frame, side frame, and lumbar support and impact plate. Fig. 13-1 is an enlarged schematic cross-sectional view of an essential part in which the example of Fig. 13-1 is provided symmetrically to the left and right, and a part thereof is omitted The principal part expanded sectional schematic diagram which showed another Example of FIGS. 13-1 FIG. 13-1 is an enlarged schematic cross-sectional view of the main part showing still another embodiment of FIG. The principal part expanded sectional schematic diagram which showed the operation state of FIGS. 13-3. FIG. 13-1 is an enlarged schematic cross-sectional view of an essential part showing still another embodiment of FIG. Side surface schematic diagram showing the state of the impact plate in FIGS. 13-1 to 13-4 and showing the positional relationship of the impact plate Side surface schematic diagram showing the operation state of FIG. 13-5-1 Side surface schematic diagram showing the state of other impact plates in FIGS. 13-1 to 13-4 and showing the positional relationship of the other impact plates Side surface schematic diagram showing the operation state of FIG. 13-5-3 In the embodiment of FIG. 13-1, a scale schematic diagram of the state in which the headrest is raised. In the embodiment of FIG. 13-1, the scale schematic diagram of the state where the headrest is raised and tilted forward. FIG. 13-1 to FIG. 14-2 collectively illustrate the embodiments described above. The side spring (the side of the upper frame) and the upper spring (the return of the impact plate, or the upper frame / headrest) A diagram showing a preferred example of the combination of the mechanism and its effect in relation to the spring, damper, and its combination elastic body)

  In the first embodiment shown in FIGS. 1 to 7-7-3, 1 is a seat, and this seat 1 is an elastic provided on a gate-shaped seat back frame 3 as viewed from the front of the seat back 2. A spring 5 or a lumbar support 500 made of a member and having a substantially U shape in an overhead view (plan view), and this spring 5 (one, two, or a plurality) or a lumbar support 500 (one or The left and right folded plate portions 5b, 5b (bent sides), 500a, 500a are attached to the upper frame 10, the side frame 8 and the like of the seat 1 to which the two or a plurality of folded plates are attached. The spring 5 or the lumbar support 500 is in contact with the back of the occupant I (occupant). The bulge plate portion 5a (flexible side) bulges in the traveling direction in a plan view in the normal state. The left and right bent plate portions 5b and 5b are bent at both end portions 5a1 and 5a2 of the output plate portion 5a and bent in the running direction.

  The left and right bent plate portion 5b includes interlocking locking pieces 6 and 6 (referred to as 6) on which side frames 8 described later are locked. Examples of the interlocking locking piece 6 include the first to seventh examples shown in FIGS. 7-1-1 to 7-7-3. This will be specifically described below. First, the structure of FIGS. 7-1-1 to 7-1-3 has a double V shape, and the tips 600a and 600a of the V shape 600 are contracted from the direction of the arrow and then recovered (expanded / reduced). The same applies to the following, and the base end portions 600b and 600b of the V-shaped 600 are characterized in that they are locked in linked locking holes 7 and 7 (referred to as 7) described later. The structure of FIGS. 7-2-1 to 7-2-4 has a protruding portion 601 shape, the bent portions 601a and 601a of the protruding portions 601 and 601 have a square shape, and the bent portions 601a and 601a have a bent shape. The feature is that the base end portions 601b and 601b of the protruding portions are engaged with the connected engagement holes 7 by expanding and contracting. Moreover, the structure of FIGS. 7-3-1 to 7-3-4 is another example of the structure of FIGS. 7-2-1 to 7-2-4, and a protruding portion 601 provided with a square shape. The bent plate portion 5b of the spring 5 connected to the base end portion 601b of the spring is provided with an uneven portion and a saw-shaped expansion / contraction portion so that the double base portion 601b is engaged with the interlocking engagement hole 7. It is a feature. The structure of FIGS. 7-4-1 to 7-4-3 is a triangular chevron 602. The bent portions 602a and 602a of the triangular base end are expanded and contracted, and the base end portions 602b and 602b of the triangular base 602 are expanded and contracted. It is characterized by being locked in the linked locking hole 7. The structure of FIGS. 7-5-1 to 7-5-3 has the protruding portions 601 and 601 with the base end curved surface portions 601c and 601c, and the expanded and bent portion 601d formed by bending the protruding portions 601 and 601. , 601d, the curved surface portions 601c and 601 and the expanded and folded portions 601d and 601d expand and contract, and the folded bent end portions 601d1 and 601d1 of the expanded and folded portions 601d and 601d are linked. It is characterized by being locked in the stop hole 7. The structure of FIGS. 7-6-1 to 7-6-4 is another example of the structure of FIGS. 7-2-1 to 7-2-4. Recessed portions 601b1 and 601b1 are provided in the bent plate portions 5b and 5b of the spring 5 to which the base end portions 601b and 601b of the 601 and 601 are connected, and the double bases 601b1 and 601b are connected and locked. It is characterized by locking in the hole 7. Furthermore, the structure of FIGS. 7-7-1 to 7-7-3 is provided with protrusions 603 and 603 with bent pieces 603a and 603a on the free end side from the base end 603b and the base end 603b. The protrusions 603 and 603 are expanded and contracted, and the bent pieces 603a and 603a are locked to the rib pieces 7a and 7a of the connected locking hole 7.

  Reference numeral 8 denotes a side frame formed of a triangular spring plate 800 in plan view. The side frame 8 is connected and locked to the left and right bent plate portions 5 b and 5 b of the spring 5. This linkage locking is achieved by the linkage locking piece 6 of the spring 5 and the linked locking hole 7 of the side frame 8 (shown in FIGS. 7-1-1 to 7-7-3). The first example to the seventh example are given).

  The spring 5, the side frame 8, and the upper frame 10 (seat frame as a whole) are covered with a cushion material 11 made of urethane resin and a skin to constitute the seat 1.

  Subsequently, in the second embodiment shown in FIG. 8-1 to FIG. 12, differences from the first embodiment will be described. In this second embodiment, the upper frame 10 is divided into three parts to form an upper frame 100, a first connection frame 12 and a second connection frame 13, and the first connection frame 12 with respect to the upper frame 100. Enables the operation A as will be described later, and allows the second connection frame 13 to perform the operation B as described later on the first connection frame 12, and further this upper with respect to the side arm 80. The first connecting frame 12 and the second connecting frame 13 including the frame 100 are characterized by enabling the operation C. The operations A to C are performed in conjunction with each other by impact, but may be performed individually. Hereinafter, a preferable example of the second embodiment will be described.

  The structure in which the side frame 80 and the spring 5 (lumbar support 500) are attached to the upper frame 100 via the first connection frame 12 and the second connection frame 13 will be described. The horizontal direction of the upper frame 100 (the vehicle width) The joint portions 100a, 100a (which will be described on the one side in the following description; the strength provided with the concave and convex stripes and the locking of the spring 15) are provided at both ends of the direction). The straight pipe 1200 facing the vertical direction (vehicle height direction) and the bent pipe tip side 1201a of the first connecting frame 12 formed of the bent pipe 1201 are inserted and removed. The bent pipe tip side 1201a is provided so as to be drawn out and inserted into the joint portion 100a. A spring 15 is inserted in a fitting portion between the joint portion 100a and the bent pipe tip side 1201a so as to return the bent pipe tip side 1201a. Therefore, the first connection frame 12 has a structure that expands and contracts in the horizontal direction with respect to the upper frame 100. This movement of the first connecting frame 12 is shown as operation A in the figure.

  Further, the joint portion 1300 of the second connection frame 13 facing the vertical direction (the vehicle height direction) is used for the joint portion 1202 of the first connection frame 12 (strength provided with uneven grooves and locking of the spring 16). Is inserted and removed. The joint portion 1300 is provided so as to be drawn out and inserted into the joint portion 1202. A spring 16 for inserting the second connection frame 13 and / or the first connection frame 12 is inserted into a fitting portion between the joint portion 1300 and the joint portion 1202. Accordingly, the second connection frame 13 and / or the first connection frame 12 has a structure that expands and contracts in the vertical direction. In addition, a lumbar support 500 (spring 5) is provided between the first connection frames 12. In this example, the lumbar support 500 (upper lumbar support 500b) is inserted into the bracket 18 provided on the first connection frame 12 and attached using the stopper 19. However, the lumbar support 500 is an example. A method such as insertion is also possible (the same applies to other examples). This movement of the second connecting frame 13 is shown as operation B in the figure. Further, in the structure in which the lumbar supports 500 are provided in pairs, the upper lumbar support 500b is made flat and the lower lumbar support 500c is considered in consideration of catching the back of the occupant I as shown in FIG. However, as shown in FIG. 11, another combination of the upper lumbar support 500b and the lower lumbar support 500c is also possible.

  Then, the second connecting frame 13 squeezes the lower side 13a and swells in a flat shape (in the vehicle traveling / retracting direction and in the vehicle length direction) toward the lower side. The lower side 13a is inserted with an upper side 80a of a side frame 80 in a form of a substantially rectangular shape with a partially open inner side and a skirt shape extending downward, in plan view. A space H is formed in three directions at the insertion point. In this space H, a first spring 20 (plate spring) is provided to urge the second connection frame 13 inward of the seat 1, and at the same time, the second connection frame 13 and / or the side frame 80. Horizontal return and buffering (supporting shock absorption and bending of the lumbar support 500; the same applies hereinafter). Further, second and third springs 21 and 22 (plate springs) for returning and buffering in the vehicle length direction are provided, and the second connecting frame 13 is moved in the front-rear direction (vehicle length direction) of the seat 1 with a total spring force. The second connecting frame 13 and / or the side frame 80 is returned and buffered in the vehicle length direction. The second connecting frame 13 and the side frame 80 are connected by the fasteners 24 and 25, but the movement of the second connecting frame 13 and / or the side frame 80 (second and third springs 21). In order to ensure the reaction force of 22, 22, the stopper 25 fixed to the second connecting frame 13 is inserted into a long hole 26 provided in the side frame 80 (not shown, but the stopper 25 may be provided in the second connecting frame 13 by the fixing method 25). The relationship between the stopper 25 and the long hole 26 is an example, but is ideal for securing the movement of the side frame 80. However, although not shown, there may be an example in which this movement is ensured by the stopper 24 and the stoppers 24 and 25 are both secured. An example of the relationship and combination of the stoppers 24, 25 and the long hole 26 is shown in FIG. The lower lumbar support 500c is inserted into the bracket 27 of the second connection frame 13 protruding from the opening 80b opened in the side frame 80, and is fixed using the stopper 28. The movement of the side frame 80 is shown as operation C in the figure. This operation C is mainly caused by the impact of the occupant I on the lumbar support 500.

  The above-mentioned operations A to C are performed due to the impact of the occupant I seated on the seat 1, and the operations A to C protect the occupant I and aim at a buffering effect and avoiding a passenger's accident. . Or it is effective for improving the ride comfort. It is also meaningful for people with disabilities, sick people, sick people, etc.

  As shown in FIG. 10, the connection between the first and second connection frames 12 and 13 and the lumbar support 500 may be an example by welding 29.

Subsequently, as schematically shown in FIG. 3-2, the spring 5 and the side frame 8 (side back) are impact loads on the occupant I seated at the center of the seat 1, for example, in first to sixth six stages. The changing state is a schematic plan view. 3-2 will be described individually. First, in FIG. 4-1, it is the first stage and is slightly retracted toward the rear (rear side of the vehicle length). Since I does not contact the spring 5 or the side frame 8, the spring 5 and the side frame 8 are not changed. And in FIG. 4-2, it is a 2nd step and is further retracted | retreated toward back, and there is no contact similarly to the above, and the spring 5 and the side frame 8 are a state which does not change. Subsequently, in FIG. 4C, it is the third stage, and further retracts backward, and at this stage, the occupant I is in contact with the bulging plate portion 5a of the spring 5. However, the impact load is small with respect to the bulging plate portion 5a, and the side frame 8 is not changed. Next, in FIG. 4-4, since the bulging plate portion 5a of the spring 5 is depressed, both end portions 5a1, 5a2 (referred to as 5a1) of the spring 5 are moved, and both the end portions 5a1 and the bent plate are moved. A change occurs in the connecting portion ( flexible plate portion 5c) of the portion 5b. By the movement of the bending plate portion 5c (as a base point), the tip portion of the bent plate portion 5b moves outward, and the tip portion 8a of the side frame 8 locked to the bent plate portion 5b is slightly, While opening in reverse C shape, the inner side 8b will be in a depressed state. This open state and indented state are effective for guiding the occupant I to the rear side of the seat 1 and are considered to be useful for preventing separation from the seat 1 and for mitigating the impact. Thereafter, the process further proceeds. In FIG. 4-5, the depression of the bulging plate portion 5a of the spring 5 further proceeds, so that the bulging plate portion 5a of the spring 5 has a reverse pattern (the reverse of the state of FIG. 4-1). With the bent plate portion 5c as a starting point, the bent plate portion 5b has its tip portion and recess portion returned inward, so that the opening of the tip portion 8a of the side frame 8 and the recess of the inner side 8b are returned. It is in a parallel state. In this substantially parallel state, the entire occupant I is guarded. Then, when the state of FIG. 4-5 is obtained and FIG. 4-6 is obtained, the impact is absorbed by the seat 1 and the spring 5 or the like. For example, the bulging plate portion 5a of the spring 5 While returning to the base, the occupant I returns to the center of the seat 1 (returns toward the depression of the seat 1). With the return of the bulging plate portion 5a and the occupant I, the bulging plate portion 5a, the front portion 8a of the side frame 8 and the like return to the initial state shown in FIG. It will be in the sitting state. Examples of FIGS. 4-1 to 4-6 are sequentially repeated. Further, FIGS. 4-1 to 4-6 are examples, and various changes may be made depending on the degree of the collision load and / or the seating posture on the seat 1, the physique, and the like.

Further, as schematically shown in FIG. 5B, the spring 5 and the side frame 8 (side back) are shock loads applied to the occupant I seated offset to the center of the seat 1, for example, first to sixth six. The state changing in stages is shown in a schematic plan view. 3-2 will be described individually. First, in FIG. 6-1, it is the first stage, and it contacts one side frame 8 (on the left side in the drawing, the so-called offset side). The tip 8a of the one side frame 8 slightly changes, and when the occupant I collides with the one side frame 8, the inside 8b is depressed. However, even if this dent occurs, the one side frame 8 serves to guide the occupant I, and therefore moves the occupant I toward the center of the seat 1. Further, since the occupant I does not contact the spring 5 and the other side frame 8, there is no change. And in FIG. 6-2, it is the second stage, and further, it moves backward toward the center, but there is still no contact in the same manner as described above, and the spring 5 and the other side frame 8 are not changed. The front end 8a of the side frame 8 returns to the base, and is in a state similar to that shown in FIG. Subsequently, in FIG. 6C, it is the third stage, and further, it is retracted rearward, and at this stage, the occupant I is in a state of stopping against the bulging plate portion 5a of the spring 5. However, the impact load is small with respect to the bulging plate portion 5a, and the spring 5 and the one / other side frame 8 are not changed. Next, in FIG. 6-4, when the bulging plate portion 5a of the spring 5 is depressed, both end portions 5a1 of the spring 5 are moved, and the connecting portion ( deflection) between the both end portions 5a1 and the bent plate portion 5b. Changes occur in the plate part 5c). Due to the movement of the bending plate portion 5c (as a base point), the tip portion of one (offset side) bent plate portion 5b returns inward and the one side frame 8 locked to the bent plate portion 5b The change and depression of the front portion 8a and the inner side 8b are returned. Further, this one side frame 8 is effective for guiding the occupant I to the rear side of the seat 1 and is considered to be useful for preventing the detachment from the seat 1 and for reducing the impact. In addition, it is possible that the front part of the other side frame 8 changes to approach the one side frame 8 somewhat. Thereafter, the process further proceeds, and in FIG. 6-5, the depression of the bulging plate portion 5a of the spring 5 further proceeds, so that the bulging plate portion 5a of the spring 5 has a reverse pattern (the reverse of the state of FIG. 6-1). With the bent plate portion 5c as a base point, the bent plate portion 5b has its tip portion returned inward so that the recesses of the tip portion 8a and the inner side 8b of the one side frame 8 are respectively returned. It is the state which became parallel. This structure guards the entire occupant I in a substantially parallel state. 6-5 is obtained, and in FIG. 6-6, the impact is absorbed by the seat 1 and the spring 5 or the like. For example, the bulging plate portion 5a of the spring 5 While returning to the base, the change of the front portion 8a of one side frame 8 and the depression of the inner side 8b return to the initial state, whereby the occupant I returns to the center of the seat 1 (returns toward the depression of the seat 1). . With the return of the bulging plate portion 5a and the occupant I, the bulging plate portion 5a and the front portion 8a of one side frame 8 return to the initial state of FIG. Normal seating is achieved. Examples of FIGS. 6-1 to 6-6 and FIG. 4-1 are sequentially repeated. Further, FIGS. 6-1 to 6-6 and the like are examples, and various changes may be made depending on the degree of the collision load and / or the seating posture on the seat 1, the physique, and the like.

  Further, another embodiment will be described. FIGS. 13-1 to 14-2 are structures (active headrest structures) obtained by further evolving the embodiment of FIG. 8-1-1. As shown in FIGS. 13-1 to 13-4, the structure is such that one, two, or a plurality of impact plates 30 (operation plates) that are curved are provided between the seat back frames 3. The number is adjusted in consideration of the width and / or thickness of the impact plate 30 (the same applies to the other examples described above). Specifically, in FIG. 13A, the upper end of the impact plate 30 is provided at the base ends of the left and right upper frames 100 (which will be described on the other hand) and attached to the upper end of the impact plate 30. A long hole 30a is opened, and a pin 31 is provided in the long hole 30a, and a spring 32 that controls the return of the pin 31 and the raising of the headrest 35 is provided between the long hole 30a and the pin 31. The pin 31 is provided on a bracket 34 provided at the lower end of the upper frame 100. And the structure which provides the lower end in the lower frame 36, and in FIG. 13-2, the upper end (the same as the above example) of the impact plate 30 is the lumbar support 5 (upper lumbar support 500b) provided in the first connection frame 12. ) And the lower end of the lower frame 36, or in FIGS. 13-3 and 13-3-1 the upper end of the impact plate 30 (same as the above example) is connected to the first connecting frame 12. A structure provided on the lumbar support 5 (upper lumbar support 500b) provided and a lower end thereof provided on the lumbar support 5 (lower lumbar support 500c) provided on the side frame 80, and in FIG. Is provided on the lumbar support 5 (upper lumbar support 500b) provided on the upper portion of the first connection frame 12, and the lower end thereof is Structure in which the lumbar support 5 (lumbar support 500c below) provided on the frame 80 are conceivable. In any case, the lumbar support 5 and the impact plate 30 are provided at the same position with the intention of providing a structure that does not hinder the functions of the impact plate 30 and the lumbar support 5 or simultaneous operation. There is a structure (see FIGS. 13-5-1 to 13-5-4). The impact plate 30 is attached to a support rod (or lumbar support 5) (not shown) that is passed between the upper frame 100 and the side frame 80 (seat back frame 3). Although not shown, there may be a structure in which the upper end of the impact plate 30 is fixed to each member.

  The feature of providing the impact plate 30 is effective when emphasizing the active headrest function of the headrest 35. For example, when the function of the impact plate 30 is important, the impact plate 30 is spaced from the lumbar support 5 and in front of the lumbar support 5 ( A structure provided on the traveling side of the vehicle is preferable (see FIG. 13-5-1 and “I” in FIG. 13-5-2 as an example). In the case where importance is attached to the function of the lumbar support 5, it is preferable that the lumbar support 5 is provided at a distance from the impact plate 30 and in front of the impact plate 30 (vehicle traveling side) (FIG. 13). -1-1 and “B” in FIG. 13-1-2 as an example). In addition, the example of FIG. 13-5-3 and FIG. 13-5-4 can be considered substantially the same.

  The operation and characteristics of the impact plate 30 will be described. In FIGS. 13-1 to 14-2, the impact plate 30 is pressed by the impact of the occupant I and is in a substantially flat state (FIG. 13-3-1, FIG. 13-5-2, FIG. 13-5-4, and the like), the first connecting frame 12 and / or the upper frame 100 are raised. With this rise, as shown in FIG. 14A, the headrest 35 rises, protects the head II of the occupant I, and is a structure useful for eliminating whiplash. Further, as shown in FIG. 8-1-7, in the structure in which the second connection frame 13, the first connection frame 12, and / or the upper frame 100 are movable with respect to the side frame 80 (operation C), FIG. As shown in FIG. 2, since the headrest 35 can be ensured to be tilted forward, there is a benefit that a sufficient effect can be expected to eliminate whiplash.

  13-5-1 to 13-5-4 show the structure of the impact plate 30 and the lumbar support 5 (positional relationship and expansion / contraction relationship when the seat 1 is viewed from the side). FIG. 13-5-1 and FIG. 13-5-2 show an example in which a gap is provided in front of or behind the lumbar support 5 (reverse side of the vehicle). Although not shown, the lumbar support 5 can be alternately front and rear in the vertical direction. As in this example, in the structure provided at intervals, the above-described features of the lumbar support 5 and the impact plate 30 can be exhibited individually and reliably. 13-5-3 and FIG. 13-5-4 show an example in which the lumbar support 5 is provided in contact with the front (vehicle traveling side) or the back (reverse side of the vehicle). As in this example, in the structure provided in contact with each other, the characteristics of the lumbar support 5 and the impact plate 30 can be exhibited simultaneously. Although not shown, the front and rear contacts can be alternated in the vertical direction of the lumbar support 5.

  The spring 5, the lumbar support 500, and the impact plate 30 described above can be used as substitute members for the cushioning member (not shown, conventional spring, lumbar support) of the seat 1, but the spring 5, the lumbar support 500, etc. It can be used in combination with a spring, lumbar support, or the like.

  FIG. 15 is a table summarizing the embodiments described in FIGS. 13-1 to 14-2. The spring 16 (side spring) and the upper spring 32 (return of the impact plate 30, Or, a preferred example of the combination of the mechanism and its effect in relation to the spring and damper (not shown) for controlling the rise of the upper frame 100 and the headrest 35 and the combination elastic body (the spring 32 and the damper) is shown. More specifically, the spring A indicates the spring 16 and the spring B indicates the spring 32. The damper C is not shown in the figure. Each of the springs A and B and the damper C has a magnitude (strong and small), and the horizontal axis shows various combinations of these, the degree of load on the seat back 2, and the ups and downs. -Shows the rise of the frame 100 and the time (rise speed), and further shows the rise of the headrest 35 and the degree of the time, and what will the result be based on each pattern on the horizontal axis? These are shown on the vertical axis, and in principle, there are 12 possible results, and the results (combination effects) of selecting the vertical axis and the horizontal axis are shown at the intersections. In the remarks column, “1” to “4” of the shaft indicates the characteristic that the damper is not used, and “5” to “12” indicates that the characteristic of the damper is exhibited. However, this is the effect of the present invention.

1 sheet
2 Seat back
3 Seat back frame
5 Spring
5a swelling plate
5a1 end
5a2 end
5b Bent plate part
5c flexure plate
500 lumbar support
500a bent plate
Lumbar support above 500b
Lumbar support below 500c
6 Linking piece
600 V type
600a Tip
600b Base end
601 Protrusion
601a bent part
601b Base end
601b1 recess
601c Curved surface
601d Expanded bending part
601d1 Bent proximal end
602 triangular mountain
602a bent part
602b proximal end
603 Protrusion
603a bent piece
603b Base end
7 Linked locking holes
7a Rib pieces
8 Side frame
8a ahead
8b inside
800 Spring plate
80 side frame
80a upper side
80b opening
10 Upper frame
100 upper frame
100a Joint part
11 Cushion material
12 First connection frame
1200 straight pipe
1201 bent pipe
1201a bent pipe tip side
1202 Joint part
13 Second connection frame
1300 Joint part
13a lower side
15 Spring
16 Spring
18 Bracket
19 Stopper
20 First spring
21 Second spring
22 Third spring
24 Stopper
25 Stopper
26 Long hole
27 Bracket
28 Stopper
29 Welding
30 Impact plate
30a long hole
31 pins
32 Spring
34 Bracket
35 headrest
36 Lower frame
H space
I Crew (Crew)
II head

Claims (6)

In a vehicle seat constituted by a spring or a lumbar support formed of an elastic member provided on a seat back of the seat, and the side frame of the seat connected to the spring or the lumbar support,
The spring or the lumbar support is in contact with the back of the occupant, in a normal state, it bulges in the traveling direction in plan view, and at the time of an impact load, a bulging plate portion having a structure that changes so as to be recessed in the opposite traveling direction; The bulging plate portion is composed of bending plate portions provided at both ends of the bulging plate portion, and left and right bent plate portions connected to the respective bending plate portions. A plurality of springs or lumbar supports are provided on the seat back frame of the seat, and both free ends of the left and right bent plate portions of the spring or lumbar support are used as a base point and a configuration bent in the traveling direction. FIG. 2 is a vehicle seat having a configuration in which the side frame is formed by a triangular spring plate in a plan view and connected to the inside of the side frame. In the vehicle seat according to claim 1,
The seat back frame of the seat is composed of an upper frame and the side frame. The upper frame can be expanded and contracted in the vehicle width direction and the vehicle height direction, and the side frame is movable with respect to the upper frame. A vehicle seat with a configuration. In the vehicle seat according to claim 1,
Linked locking holes are provided in the spring or the left and right bent plate portions of the lumbar support, and the linked locking pieces are locked on the inner side of the side frame. A vehicle seat configured to be provided with In the vehicle seat according to claim 1,
The expansion / contraction function of the side frame is configured by left / right movement of both ends of the spring or the bulging plate portion of the lumbar support and / or expansion / contraction change of the spring or the left / right bent plate portion of the lumbar support. A vehicle seat. In the vehicle seat according to claim 1,
A vehicle seat configured such that the expansion / contraction function of the side frame is a change in the front portion of the side frame and / or a depression inside. In the vehicle seat according to claim 2 ,
In the configuration in which the upper frame can be expanded and contracted in the vehicle width direction and the vehicle height direction, and the upper frame is movable to the side frame, the seat back frame and / or the spring or the lumbar A vehicle seat configured to be operable with an impact plate provided between the support and the support.