JP5561398B2 - Vehicle seat cushion - Google Patents

Description

  The present invention relates to a vehicle seat cushion that can be suspended from a seat frame and elastically support a pad.

  A vehicle seat mounted on a vehicle such as an automobile generally has a rectangular seat frame, a pad attached to the seat frame, and a shock absorber suspended from the seat frame on the back side of the pad. When the pad is elastically deformed, the buffer body elastically supports the pad, thereby mitigating an impact that can be transmitted to a person seated on the seat. The shock absorber has, for example, a plurality of wires whose both ends are hooked on the seat frame and a resin member that connects between the plurality of wires arranged in parallel (see Patent Document 1). And a resin member has a role etc. which stabilize the buffer performance of a buffer body by regulating the approach and separation between wires.

JP 2007-313045 A

  However, the conventional resin member connects the wires in a straight line. The resin member generally contracts due to heat, contracts with time due to heat, and pulls in a direction in which the wires approach each other. As a result, in the resin member, the attachment portion attached to the wire gradually becomes white, the strength of the attachment portion becomes weak, and there is a problem in durability. Then, this invention makes it a subject to provide the shock absorber for vehicle seats with high durability.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat cushion having the structure described in each claim. According to the first aspect of the present invention, the shock absorber has a plurality of wires juxtaposed at both ends of the seat frame and a resin member that connects the wires. And the bending part which accept | permits the elastic deformation of the direction between several wires is formed in the resin member. Therefore, when the resin member contracts due to heat or the like, the resin member elastically deforms around the vicinity of the bent portion, and the length in the inter-wire direction changes. Therefore, when the resin member contracts, the internal stress of the resin member can be dispersed by elastic deformation of the resin member. In this way, stress concentration on the attachment portion of the resin member attached to the wire is alleviated, and whitening of the attachment portion can be prevented. As a result, the durability of the resin member is improved.

  Furthermore, according to the invention described in claim 1, the resin member is farther from the pad than the first part between the pair of first parts extending on the plane connecting the plurality of wires and between the pair of first parts. It has the 2nd part located in a position, and the connection part which connects each 1st part and said 2nd part. Bent portions are formed between each first portion and each connecting portion, and between the second portion and each connecting portion. Therefore, the resin member can be deformed in the vicinity of the plurality of bent portions. In addition, since the resin part is located on the plane where the first part connects a plurality of wires, the second part deforms in a direction close to the first part from a position far from the pad, so that the inter-wire direction Elastically deforms. Therefore, the resin member does not interfere with the pad even when elastically deformed.

  According to the invention described in claim 2, the second portion of the resin member is provided with a mounting portion to which a clip or a sensor is mounted. A clip head or sensor is installed between the second part and the pad. Therefore, since the second part is located farther from the pad than the first part, the resin member can form a gap between the second part and the pad. The head of the clip or the sensor is disposed in the gap. Therefore, the clip head or sensor does not get in the way of the pad.

  According to invention of Claim 3, the rib is formed in the outer periphery of the 2nd part of the resin member. The height of the rib is set so as to be substantially the same as the plane on which the first part is located protruding from the outer peripheral edge. Therefore, since the rib is substantially the same height as the plane on which the first part is located, the rib is sufficiently high without interfering with the pad. This sufficiently increases the strength of the second part.

It is a partial cross section perspective view of a vehicle seat. It is a perspective view of a buffer. It is a top view of a buffer and a seat frame. It is a left view of a buffer and a seat frame. It is a partial expansion perspective view of a buffer and a seat frame which shows a mode that a buffer is latched to a seat frame. It is a partial expansion perspective view of a buffer and a seat frame. It is a partial enlarged top view of a buffer and a plate member. It is a partially expanded top view of a resin member and a pair of wires. It is the IX-IX sectional view taken on the line of FIG. It is a partially expanded top view of another resin member and a pair of wires. It is the XI-XI sectional view taken on the line of FIG. It is a partially expanded top view of another resin member and a pair of wires. FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the seat 20 is a seat that is mounted on a vehicle such as a vehicle, and includes a seat cushion 20a and a seat back 20b that is connected to the seat cushion 20a so as to be adjustable in angle. The seat cushion 20 a and the seat back 20 b each have a seat frame 23, a pad 21 attached to the seat frame 23, and a skin 22 that covers the surface of the pad 21. The pad 21 is formed from a foamed resin such as urethane foam.

  The seat frame 23 of the seat cushion 20a has a rectangular shape as shown in FIG. 1, and includes a plate-like plate member 24 arranged on the front side, a cylindrical bar 25 arranged on the rear side, and left and right sides. A plate-like side frame 26 is provided. The buffer member 1 disposed on the back side (lower side) of the pad 21 is cross-linked to the plate member 24 and the bar 25.

  As shown in FIG. 1, the shock absorber 1 is disposed on the back surface of the pad 21 and elastically supports the pad 21 when the pad 21 is elastically deformed. Thereby, the buffer body 1 reduces the impact that can be transmitted to the person seated on the seat 20. As shown in FIGS. 2 and 3, the buffer body 1 integrally includes a metal spring body 1 a having elasticity and a plurality of resin members 4 to 11. The spring body 1 a has a pair of wires 2 arranged side by side and a connection wire 3 that connects between one end portions of the wires 2 in a single shape.

  The wire 2 includes a longitudinally extending portion 2a extending in the longitudinal direction (vertical direction in FIG. 3) and a laterally extending portion extending in the lateral direction (right and left direction in FIG. 3) substantially orthogonal to the longitudinally extending portion 2a. A plurality of protruding portions 2b are alternately provided. Between the long extension part 2a and the short extension part 2b, the wire bending part 2c which connects these is provided. A hook 2 d that is hooked on the bar 25 is formed at one end of the wire 2. The hook 2d extends upward in an arc shape. Between the pair of hooks 2d, a connection wire 3 for connecting them extends in the short direction.

  The resin members 4 to 11 are made of a resin material such as polypropylene, preferably a resin material such as polyacetal having high creep resistance. The resin members 4 to 11 are molded integrally with the spring body 1a by setting the spring body 1a in a mold and performing injection molding (see FIGS. 2 and 3). The resin member 10 is provided in the foremost short extending portion 2 b of the wire 2. As shown in FIG. 5, the resin member 10 includes a pair of support portions 10 a and 10 b that enclose both ends of the short extension portion 2 b and an attachment portion 10 c that encloses a central portion of the short extension portion 2 b. ing. The attachment portion 10c is hooked from the front by a claw 24a cut and raised by the plate member 24 of the seat frame 23.

  As shown in FIG. 6, the pair of support portions 10a and 10b are disposed on the left and right sides of the claw 24a. Accordingly, the movement of the wire 2 in the left-right direction with respect to the plate member 24 is restricted by the support portions 10a and 10b. The support portions 10a and 10b have a diameter larger than that of the attachment portion 10c and are higher than the height of the claw 24a. Therefore, the pads 21 are prevented from coming into contact with the claws 24a by the support portions 10a and 10b. As a result, the pad 21 can be prevented from being damaged by the claw 24a by the support portions 10a and 10b.

  As shown in FIG. 2, the resin member 11 includes a hook 2 d at the rear end of the wire 2. The resin member 11 is hooked on the bar 25 of the seat frame 23 together with the hook 2d from below. Thereby, the resin member 11 prevents the metal wire 2 and the bar 25 from coming into direct contact, and prevents the generation of abnormal noise that may occur due to these contacts.

  As shown in FIGS. 3 and 7, the resin members 4 and 5 are provided in the front portion of the wire 2. The resin member 4 integrally includes a pair of inner bodies 4e attached to each wire 2 and a connecting portion 4d that connects the pair of inner bodies 4e. The inner body 4e has a cylindrical shape, and includes a long inner packet part 4a that encloses the second long extension part 2a from the front, and a short inner packet part that encloses the second short extension part 2b from the front. 4b. A bent inner portion 4c that encloses the wire bent portion 2c is formed between the long inner portion 4a and the short inner portion 4b. The resin member 4 includes one wire bent portion 2c in each wire 2 and does not continuously include a plurality of wire bent portions 2c. The connecting part 4d connects the pair of long inner packet parts 4a at positions avoiding the bent inner packet part 4c.

  As shown in FIG. 7, the resin member 5 integrally includes a pair of inner bodies 5 e that includes a part of each wire 2 and a connecting portion 5 d that connects the pair of inner bodies 5 e. The inner body 5e has a cylindrical shape, and includes a long inner packet part 5a that encloses the first long extension part 2a from the front and a short inner packet part that encloses the second short extension part 2b from the front. 5b. A bent inner portion 5c that encloses the wire bent portion 2c is formed between the long inner portion 5a and the short inner portion 5b. The resin member 5 includes one wire bent portion 2c in each wire 2 and does not continuously include a plurality of wire bent portions 2c. The connecting portion 5d connects the pair of long inner inclusion portions 4a at a position avoiding the bent inner inclusion portion 5c.

  As shown in FIGS. 3 and 7, the resin members 4 and 5 are placed on the plate member 24 together with the wires 2. Therefore, the resin members 4 and 5 prevent the wire 2 and the plate member 24 from being in direct contact and prevent abnormal noise generated by the contact. The resin members 4 and 5 have connecting portions 4d and 5d that connect the pair of wires 2 together. Accordingly, the pair of wires 2 are connected by the resin members 4 and 5. Between the resin members 4 and 5, the exposed part 2e which exposes a part of the wire 2 between the wire bending parts 2c is formed. Therefore, when the resin members 4 and 5 are injection-molded, the portion corresponding to the wire 2 exposed by the exposed portion 2e can be held by the wire fixing pin.

  As shown in FIGS. 2 and 3, the resin members 6 and 7 have a thin plate shape and are provided across the four wires 2. The resin member 6 extends in the left-right direction at the front side portion of the shock absorber 1. On the other hand, the resin member 7 extends in the left-right direction at the rear side portion of the buffer body 1. As shown in FIGS. 8 and 9, the resin member 6 includes an attachment portion 6 a that is attached to the wire 2, a first portion 6 b that extends on a plane connecting the wire 2, a recess portion 6 c, and a hook 6 f. Yes.

  The attaching part 6a encloses the wire 2 as shown in FIGS. The recessed portion 6 c is recessed downward in the middle of the first part 6 b and at both the left and right positions of the resin member 6. The hollow portion 6c has a pair of bent portions 6d and 6e that are bent in a direction (downward) away from the pad 21 from the first portion 6b. The inclination angle of the bent portion 6e with respect to the first portion 6b is smaller than the inclination angle of the bent portion 6d and is gentle. A wide portion 6b1 of the first part 6b is formed at a position adjacent to the gentle bent portion 6e. The wide part 6b1 is wider than the other part of the first part 6b, a notch 6b2 is formed at the center, and the wide part 6b1 is annular.

  The wide part 6b1 is provided with a hook 6f as shown in FIGS. The hook 6f extends in a cantilever shape from one end on the center side of the shock absorber 1 of the notch 6b2 toward the outside. The hook 6f has a main body portion 6f1 extending obliquely downward from the first portion 6b, a retaining portion 6f2 projecting upward from the front end of the main body portion 6f1, and a receiving portion 6f3 curved downward from the front end of the retaining portion 6f2. doing. In the vicinity of the receiving portion 6f3, a bent portion 6e extending at a gentle angle is positioned substantially parallel to the receiving portion 6f3.

  As shown in FIG. 9, the electric wiring member 13 is hooked on the hook 6f. In this method, first, the electric wiring member 13 is moved from the gentle bent portion 6e side to the receiving portion 6f3. As a result, the hook 6f is elastically deformed, and the electric wiring member 13 is inserted into the main body portion 6f1. The electrical wiring member 13 is prevented from coming off from the main body portion 6f1 by the retaining portion 6f2 due to the elastic return of the hook 6f. A reinforcing portion 6f4 that thickens the hook 6f in the thickness direction is formed between the base end portion of the hook 6f and the main body portion 6f1. Thereby, the strength of the hook 6f is increased.

  As shown in FIGS. 10 and 11, the resin member 7 includes a plurality of attachment portions 7 a attached to the wire 2, a plurality of first portions 7 b extending on a plane connecting the wires 2, and a plurality of through holes. It has a second part 7c. The attachment portion 7 a contains the wire 2. The second part 7c extends at a position farther from the pad 21 than the first part 7b. Between the 1st part 7b and the 2nd part 7c, the connection part 7h which connects these is provided. Between the first part 7b and the connecting part 7h, a bent part 7d that bends downward from the first part 7b is provided, and between the second part 7c and the connecting part 7h, bent from the second part 7c upward. A bent portion 7e is provided.

  As shown in FIGS. 10 and 11, the second part 7c is wider than the first part 7b. The second portion 7c is provided with an annular mounting portion 7f having a through hole. A clip 12 is attached to the attachment portion 7f, and the clip 12 integrally includes a head portion 12a and a leg portion 12b. The head portion 12a is inserted into the through hole of the mounting portion 7f and is elastically attached to the mounting portion 7f. The leg part 12b has a latching claw to which the electric wiring member 13 is latched. The head 12 a of the clip 12 is installed between the pad 21 disposed above the resin member 7 and the second portion 7 c. Therefore, the head 12 a is disposed at a position that does not interfere with the pad 21.

  As shown in FIGS. 10 and 11, ribs 7g are formed on the outer peripheral edge of the second portion 7c. The rib 7g is substantially the same height as the first part 7b and does not interfere with the pad 21. Therefore, the rigidity of the resin member 7 is increased by the ribs 7g, so that when the user is seated on the seat, the pad 21 can be sufficiently prevented from dropping significantly by the resin member 7.

  The resin member 8 has a thin plate shape as shown in FIGS. 2 and 3 and is provided across the two wires 2 at the center. As shown in FIGS. 12 and 13, the resin member 8 has an attachment portion 8 a to be attached to the wire 2, a pair of first portions 8 b, and a second portion 8 c provided between the pair of first portions 8 b. Yes. The attachment portion 8 a includes the wire 2. The first part 8 b extends on a plane connecting the wires 2. The second part 8c extends at a position farther from the pad 21 than the first part 8b. Between the 1st part 8b and the 2nd part 8c, the connection part 8h which connects these is provided. Between the first part 8b and the connecting part 8h, a bent part 8d that is bent downward from the first part 8b is provided. Between the second part 8c and the connecting part 8h, a bent part 8e that is bent upward from the second part 8c is provided.

  As shown in FIGS. 12 and 13, the second portion 8 c has an extending portion 8 c 1 that extends rearward. A mounting portion 8f including a pair of ribs 8f1 is formed in the extending portion 8c1. A sensor (pressure sensor) 14 is mounted on the mounting portion 8f, and the sensor 14 is installed between the pad 21 disposed above the resin member 8 and the second portion 8c. Therefore, the sensor 14 is disposed at a position that does not interfere with the pad 21. The sensor 14 can detect the seating of the user by receiving pressure from the pad 21 when the user is seated on the seat.

  As shown in FIGS. 2 and 3, the resin member 9 is provided on both the left and right sides of the buffer body 1 and at the front and rear center positions. The resin member 9 is recessed downward and has an attachment portion 9a having a through hole in which a clip is attached. As shown in FIG. 4, the mounting portions 6a and 9a of the resin members 6 and 9 have front surfaces 6a1 and 9a1 and rear surfaces 6a2 and 9a2 which are inclined. The front surfaces 6a1, 9a1 and the rear surfaces 6a2, 9a2 are inclined downward and rearward. Therefore, when the user sits on the seat cushion 20a, the pad 21 receives a front-lower force F by the user's thigh, and the rear surfaces 6a2, 9a2 of the mounting portions 6a, 9a are inclined in a direction facing the force F. ing. Therefore, the pad 21 is not easily broken by the attachment portions 6a and 9a.

  As described above, the resin members 6 to 8 are formed with the bent portions 6d to 8d and 6e to 8e as shown in FIGS. The resin members 6 to 8 are allowed to be elastically deformed in the direction between the wires 2 by the bent portions 6d to 8d and 6e to 8e. Accordingly, when the resin members 6 to 8 are contracted by heat or the like, the resin members 6 to 8 are elastically deformed around the bent portions 6d to 8d and 6e to 8e, and the length in the direction between the wires 2 is changed. Therefore, when the resin members 6-8 contract, the internal stress of the resin members 6-8 can be dispersed by the elastic deformation of the resin members 6-8. Thus, the stress concentration on the attachment portions 6a to 8a of the resin members 6 to 8 attached to the wire 2 is alleviated, and whitening of the attachment portions 6a to 8a can be prevented. As a result, the durability of the resin members 6 to 8 is improved.

  Moreover, the resin members 6-8 have the 1st parts 6b-8b extended on the plane which tied the some wire 2 as shown to FIGS. 8-13. The bent portions 6d to 8d of the resin members 6 to 8 are bent to the side far from the pad 21 from the first portions 6b to 8b. Accordingly, the bent portions 6d to 8d are bent away from the pad 21, and therefore do not interfere with the pad 21. Further, since the first parts 6b to 8b are located on the plane where the plurality of wires 2 are connected in the vicinity of the bent parts 6d to 8d, when the wires 2 are pulled in the approaching direction, other than the first parts 6b to 8b. The portion is deformed toward the first portions 6 b to 8 b and is deformed in an area where the pad 21 does not get in the way. Therefore, the resin members 6 to 8 do not interfere with the pad 21 even when elastically deformed.

  As shown in FIGS. 10 to 13, the resin members 7 and 8 connect the pair of first parts 7 b and 8 b, the second parts 7 c and 8 c, and the first parts 7 b and 8 b and the second parts 7 c and 8 c. Connecting portions 7h and 8h. Bent portions 7d, 7e, 8d, 8e are formed between the first portions 7b, 8b and the connecting portions 7h, 8h, and between the second portions 7c, 8c and the connecting portions 7h, 8h. Therefore, the resin members 7 and 8 can be deformed in the vicinity of the plurality of bent portions 7d, 7e, 8d, and 8e. Further, since the resin members 7 and 8 are located on the plane where the first parts 7b and 8b connect the plurality of wires 2, the second parts 7c and 8c are located away from the pad 21 from the first parts 7b and 8b. By deforming in the direction approaching the wire 2, it is elastically deformed in the direction between the wires 2. Therefore, the resin members 7 and 8 do not interfere with the pad 21 even when elastically deformed.

  Further, the second portions 7c and 8c of the resin members 7 and 8 are provided with mounting portions 7f and 8f to which the clip 12 or the sensor 14 is mounted as shown in FIGS. Between the second parts 7 c and 8 c and the pad 21, the head 12 a of the clip 12 or the sensor 14 is installed. Therefore, since the second parts 7c and 8c are located farther from the pad 21 than the first parts 7b and 8b, the resin members 7 and 8 can form a gap between the second parts 7c and 8c and the pad 21. . The head 12a of the clip 12 or the sensor 14 is disposed in the gap. Therefore, the head 12 a or the sensor 14 of the clip 12 does not interfere with the pad 21.

  Also, ribs 7g are formed on the outer peripheral edge of the second portion 7c of the resin member 7 as shown in FIGS. The height of the rib 7g is set so as to be substantially the same as the flat surface protruding from the outer peripheral edge and where the first portion 7b is located. Therefore, since the rib 7g is substantially the same height as the plane on which the first part 7b is located, the rib 7g is sufficiently high without interfering with the pad 21. Thereby, the strength of the second portion 7c is sufficiently increased.

  The resin member 6 is provided at a position relatively close to the front end portion of the wire 2 whose movement in the left-right direction is restricted by the claw 24a of the seat frame 23 as shown in FIG. Therefore, the front end portion of the wire 2 hardly moves left and right even when the resin member 6 contracts due to heat or the like. Therefore, the force due to the contraction of the resin member 6 is not alleviated by the movement of the front end portion of the wire 2 and continues to be applied to the resin member 6. However, the force can be relieved by elastic deformation in the vicinity of the bent portions 6d and 6e of the resin member 6 (see FIGS. 8 and 9). Therefore, the concentration of force on the mounting portion 6 a of the resin member 6 can be alleviated by elastic deformation of the resin member 6.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) The shock absorber 1 of the above embodiment is provided on the back surface (lower surface) of the pad 21 of the seat cushion 20a. However, the buffer 1 may be provided on the back surface of the pad 21 of the seat back 20b.
(2) The resin members 6 to 8 of the above embodiment are thin plates and are arranged in parallel with the pad 21, and the bent portions 6 d to 8 d and 6 e to 8 e are bent in the thickness direction of the pad 21. However, even if the resin member is thin and is erected with respect to the pad, the bent portion is bent along the pad 21, and the vicinity of the bent portion is deformed, the resin member is elastically deformed in the inter-wire direction. good.
(3) Although the resin members 6-8 of the said embodiment were thin plate shape, a rod shape may be sufficient.
(4) In the said embodiment, the resin member 6 is provided in the front side part of the buffer body 1, and the resin members 7 and 8 are provided in the rear side part of the buffer body 1. FIG. However, the resin member 6 may be provided on the rear side portion, or the resin members 7 and 8 may be provided on the front side portion.
(5) The resin member 7 of the above embodiment has ribs 7g, and the ribs 7g are connected to the connecting portions 7h. However, the rib 7g and the connecting portion 7h are not connected, and the resin member 7 may be easily elastically deformed in the direction between the wires 2 due to this.

DESCRIPTION OF SYMBOLS 1 ... Buffer 1a ... Spring body 2 ... Wire 2a ... Long extension part 2b ... Short extension part 2c ... Wire bending part 2d ... Hook 2e ... Exposed part 3 ... Connection wires 4-11 ... Resin members 4a, 5a ... Long internal inclusions 4b, 5b ... Short internal inclusions 4c, 5c ... Bending inclusions 4d, 5d ... Connection parts 4e, 5e ... Inclusion bodies 6a-9a ... Mounting parts 6b-8b ... First parts 6d-8d, 6e-8e ... Bending part 6f ... Hooks 7c, 8c ... Second part 7f, 8f ... Mounting part 7g ... Ribs 7h, 8h ... Connecting part 12 ... Clip 12a ... Head 13 ... Electric wiring member 14 ... Sensor 20 ... Seat 20a ... Seat cushion 20b ... Seat back 21 ... Pad 23 ... Seat frame 24 ... Plate member 24a ... Claw 25 ... Bar 26 ... Side frame

Claims (3)

A vehicle seat cushion that is suspended on a seat frame and can elastically support a pad,
A plurality of wires arranged on both sides of the seat frame, the resin members connecting the wires;
The resin member is formed with a bent portion that allows elastic deformation in the inter-wire direction,
The resin member includes a first attachment portion that includes the first wire and restricts movement of the first wire in the inter-wire direction, and includes a second wire that includes the second wire. A second attachment portion for restricting movement of the wire in the inter-wire direction, and a plane extending from the first attachment portion toward the second attachment portion on a plane connecting the first and second wires. first and second part that issues a second part extending toward the first attachment portion from the second mounting portion on the same plane, said first and second first A second part located between the parts at a position farther from the pad than the first part, and a connecting part for connecting the first part and the second part,
A vehicle seat cushion, wherein bent portions are formed between each of the first portions and the connecting portions, and between the second portion and the connecting portions.

The vehicle seat cushion according to claim 1,
The second part of the resin member is provided with a mounting part to which a clip or a sensor is mounted,
The vehicle seat cushion, wherein the head of the clip or the sensor is installed between the second part and the pad. The vehicle seat cushion according to claim 1 or 2,
A rib is formed on the outer peripheral edge of the second part of the resin member,
The height of the said rib is set so that it may protrude from this outer periphery, and it may become substantially the same as the plane where a 1st part is located, The buffer body for vehicle seats characterized by the above-mentioned.

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