JP2010125972A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat capable of visually recognizing that a locking operation has been certainly performed. <P>SOLUTION: The vehicular seat includes a mounting structure 8 for mounting a headrest on a seat back 2. The mounting structure 8 includes: a stay body 4 extending from the headrest; and a support body 5 provided in the seat back 2, on which the stay body 4 is built in a nesting shape. The vehicular seat includes: a cable 7 having a pin 7c; a temporary locking groove 5c formed on the support body 5, in which the pin 7c is temporality locked; and a regular locking groove 4b formed on the stay body 4. The pin 7c is received by the regular locking groove 4b by building both bodies in the nesting shape, and the cable 7 is moved from the support body 5 to the stay body 4 to be locked. The temporary locking groove 5c formed in the support body 5 is positioned above the seat back 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle seat including a seat back and a headrest attached to the seat back.

The vehicle seat has, for example, an attachment structure for attaching the headrest to the seat back (see Patent Document 1). The mounting structure includes a stay body that extends from the headrest and a support body that is provided on the seat back and in which the stay body is assembled in a nested manner. The headrest has a base member attached to the stay body and a moving member connected to the base member so as to be movable back and forth, and a cable operated when moving the moving member forward is connected to the stay body. Has been. In order to connect the cable to the stay body, the cable is provided with a pin, the stay body is provided with a temporary locking groove for temporarily locking the pin, and the support body is formed with a main locking groove. Yes. Then, by assembling the stay body into the support body in a nested manner, the pin is received in the main locking groove, and the cable is locked and moved from the support body to the stay body.
International Publication No. 2008/026362 Pamphlet

  However, the temporary locking groove is located inside the seat back. Therefore, it cannot be confirmed from the outside of the seat back that the pin moves in the temporary locking groove and is locked in the locking groove. Therefore, there is a problem that it is not easy to confirm that the cable is securely connected to the stay body. Therefore, according to the present invention, in the structure in which the cable is locked and moved from one of the two bodies to the other by nesting the support body and the stay body, the locking operation is reliably performed. It is an object of the present invention to provide a vehicle seat that can be visually recognized.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat having a configuration as described in each claim. According to claim 1, a cable having a pin, a temporary locking groove that is formed in one of both the stay body and the support body and in which the pin is temporarily locked, and the other one of the two bodies The pin is received in the main locking groove by assembling both bodies in a nested manner, and the cable is locked and moved from one of the two bodies to the other. . The temporary locking groove or the main locking groove formed in the support body is located above the seat back.

  Therefore, it can be confirmed above the seat back that the pin moves in the temporary locking groove and is locked to the main locking groove. Therefore, the operation of locking the cable from one of the two bodies to the other can be visually confirmed, and the locking operation can be reliably performed.

  According to invention of Claim 2, it has a cap attached to the upper part of a support body. The cap has an opening that opens the temporary locking groove or the main locking groove formed in the support body. Therefore, even when the cap is attached to the upper part of the support body, it can be visually recognized that the cable is engaged and moved from one of the two bodies to the other.

  According to the invention described in claim 3, the mounting structure has a pair of support bodies. The opening of the cap opens to the side between the support bodies. Therefore, the opening is located at a position that is difficult to visually recognize from the outside of the seat. Therefore, there is little possibility that the aesthetic appearance of the sheet is impaired by the opening of the cap.

  According to the invention of claim 4, the cable has an outer cable provided with an inner cable provided with a pin and a slit through which the inner cable is inserted and the pin is movably inserted. Therefore, the inner cable is locked to either the stay body or the support body by the pin, and the outer cable can move with respect to the inner cable.

  According to the fifth aspect of the present invention, the headrest biases the moving member forward relative to the base member, the base member attached to the stay, the moving member connected to the base member so as to move back and forth. An urging member, an initial position holding mechanism that holds the moving member at an initial position with respect to the base member, and a release mechanism that interlocks with the outer cable. When the initial position holding mechanism is unlocked by the release mechanism, the moving member moves forward by the biasing member. Therefore, the headrest can approach the head of the user seated on the seat and suppress the user's whipping or the like.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 1 is a seat mounted on a vehicle such as an automobile, and includes a seat cushion 9, a seat back 2, and a headrest 3. A reclining device 20 is provided between the seat cushion 9 and the seat back 2 to connect them so that the angle can be adjusted. An attachment structure 8 for attaching the headrest 3 to the seatback 2 is provided between the seatback 2 and the headrest 3.

  As shown in FIG. 1, the seat back 2 has a frame-like frame 2a, a pad 2f attached to the frame 2a, and a skin 2g covering the outer surface of the pad 2f. The frame 2a has a pair of left and right side frames 2b, an upper frame 2c that connects the upper portions of the side frames 2b, and an under frame 2d that connects the lower portions of the side frames 2b.

  As shown in FIGS. 1 and 2, the headrest 3 includes a base member 10 and a moving member 11 that moves back and forth with respect to the base member 10. Stay bodies 4 are attached to the left and right sides of the base member 10. The moving member 11 has a front member 11a and a rear member 11d. The front member 11a and the rear member 11d are assembled to accommodate the base member 10 in a box shape. An unillustrated pad and an outer skin are attached to the outer periphery of the moving member 11. A connecting mechanism 22 is provided between the front member 11a and the base member 10 so as to relatively move them.

  As shown in FIGS. 2 and 6, the connecting mechanism 22 includes a connecting link 12 that rotatably connects the front member 11a and the base member 10, and a slide mechanism 23 that is slidably connected. The connecting link 12 has a pair of connecting portions 12a and a rotating shaft 12b. The connecting portion 12a is rotatably connected to the base member 10 side by a pin 15. The rotating shaft 12b is rotatably attached to the front member 11a.

  The slide mechanism 23 has a pin 14 and a slide groove 10a. The pin 14 is attached to a pair of protrusions 11c formed on the back surface of the front member 11a. The slide groove 10 a is formed in the shape of a through hole in the left and right wall portions 10 b of the base member 10. The slide groove 10a extends in a substantially arc shape in the vertical direction and the front-rear direction, and the pin 14 is inserted to guide and support the pin 14 so as to be movable.

  As shown in FIGS. 2 and 6, the base member 10 includes an initial position holding mechanism 24 that holds the moving member 11 at an initial position (normal use position) as a rear position, and an urging force that urges the moving member 11 forward. A member 13 is provided. The urging member 13 is a coil spring, and the upper end portion 13 a is locked to the pin 15 and the lower end portion 13 b is locked to the pin 14. The biasing member 13 is elastically extended in a state where the moving member 11 is held at the initial position.

  The initial position holding mechanism 24 includes a first hook 16 and a second hook 17 that are rotatably attached to the base member 10. The first hook 16 is urged clockwise by the urging member 26 and is locked to the second hook 17. The second hook 17 holds the pin 14 and holds the moving member 11 at the initial position. When the first hook 16 is rotated counterclockwise against the biasing member 26, the second hook 17 is rotated counterclockwise by the biasing member 27 to release the pin 14. As a result, the pin 14 is moved forward and upward along the slide groove 10a by the biasing member 13, and the moving member 11 is moved forward and upward.

  As shown in FIG. 2, the headrest 3 is provided with a release mechanism 25 that releases the initial position holding mechanism 24. The release mechanism 25 includes an operating rod 18 and an operation shaft member 19. The actuating rod 18 integrally includes a main body 18a inserted through the shaft hole 4a of the stay body 4 and a folded portion 18b extending downward from the upper end of the main body 18a. The folded portion 18 b is disposed outside the stay body 4, and the distal end portion is locked to the operation shaft member 19.

  As shown in FIG. 2, the operation shaft member 19 has a cylindrical shape and is rotatably attached to the through hole 10 c of the base member 10. On the outer peripheral surface of the operation shaft member 19, there are an arm portion 19 a to which the folded portion 18 b is locked and a convex portion 19 b that can come into contact with the first hook 16. Accordingly, the initial position holding mechanism 24 can be released by the release mechanism 25 when the operating rod 18 moves upward, the operation shaft member 19 rotates, and the convex portion 19 b pushes the first hook 16.

  As shown in FIG. 1, a detection device 21 is attached to the underframe 2 d of the seat back 2. The detection device 21 includes a tilting member 21a, a link 21b, and an arm 21c. The tilting member 21a tilts forward and backward with the lower end as a fulcrum. The link 21b has a front end connected to the tilting member 21a, and the rear end moves up and down in conjunction with the longitudinal movement of the tilting member 21a. The arm 21c is connected to the rear end of the link 21b, and rotates around the pin 21c1 in conjunction with the rotation of the link 21b.

  As shown in FIG. 1, the inner cable 7b of the cable 7 is connected to the tip of the arm 21c. Therefore, when the vehicle receives an impact from the rear and the weight of the user is applied to the seat back 2 by the inertial force, the tilting member 21a is tilted backward by the force. Then, the rear part of the link 21b moves upward, the arm 21c rotates counterclockwise, and the arm 21c pulls the inner cable 7b downward.

  As shown in FIGS. 1 and 3, the cable 7 includes an inner cable 7b and an outer cable 7a through which the inner cable 7b is inserted. The lower end portion of the outer cable 7a is attached to the under frame 2d. The lower end of the inner cable 7b is attached to the arm 21c. In the upper part of the outer cable 7a, slits 7a1 are formed on both side surfaces sandwiching the shaft center. The slit 7a1 extends vertically.

  A pin 7c is attached to the upper end portion of the inner cable 7b as shown in FIG. The pin 7c is made of metal and is substantially orthogonal to the upper part of the inner cable 7b. Both ends of the pin 7c protrude into the slit 7a1 of the outer cable 7a, and are supported by the slit 7a1 so as to be movable up and down. The upper end portion of the cable 7 having the pins 7 c is attached to an attachment structure 8 for attaching the seat back 2 and the headrest 3.

  As shown in FIG. 3, the attachment structure 8 includes a pair of brackets 2 e, a support body 5 attached to each bracket 2 e, and a stay body 4 attached to each support body 5. The bracket 2e is made of metal and has a cylindrical shape with a rectangular cross section, and is attached to the upper frame 2c. The support body 5 is made of resin and has a cylindrical shape, and is fitted to the bracket 2e.

  As shown in FIGS. 3 and 4, the support body 5 has a shaft hole 5 a and a pair of protruding portions 5 d. The projecting portion 5d projects radially from both sides of the outer peripheral surface of the support body 5 across the shaft hole 5a, and extends in the vertical direction from the lower end portion of the support body 5 to the vicinity of the upper end portion. The support body 5 has a pair of guide grooves 5b through which the pins 7c are inserted and a pair of temporary locking grooves 5c. The guide groove 5b projects from the shaft hole 5a to the projecting portion 5d, and extends upward from the lower end of the support body 5 along the projecting portion 5d.

  As shown in FIGS. 3 and 4, the temporary locking groove 5 c penetrates the shaft hole 5 a and the outer peripheral surface of the support body 5, and has a first slit portion 5 c 1 and a second slit portion 5 c 2. The first slit portion 5c1 extends in the up-down direction continuously from the guide groove 5b. The second slit portion 5c2 is folded downward from the upper end portion of the first slit portion 5c1 and extends downward. When the support body 5 is attached to the bracket 2e, the second slit portion 5c2 is positioned above the bracket 2e and above the seat back 2. Therefore, the second slit portion 5c2 is not covered with the pad 2f or the skin 2g of the seat back 2, and can be viewed from the outside.

  The stay body 4 is made of metal and has a cylindrical shape as shown in FIGS. The upper end portion of the stay body 4 is attached to the base member 10. A pair of main locking grooves 4b for locking the cable 7 are formed in the lower portion of the single stay body 4. The main locking grooves 4b are formed on the left and right sides of the stay body 4 and penetrate the outer peripheral surface of the stay body 4 and the shaft hole 4a. The main locking groove 4b extends from the lower end of the stay body 4 in a curved shape upward and horizontally.

  As shown in FIGS. 1 and 3, a cap 6 is attached to the upper portion of the support body 5. The cap 6 is made of resin and has an upper plate portion 6a and an outer peripheral portion 6b extending downward from the outer peripheral edge of the upper plate portion 6a. The upper plate portion 6a has a through hole 6a1 through which the stay body 4 is inserted. The outer peripheral part 6 b is attached to the support body 5 so as to cover the upper part of the support body 5. Thereby, the cap 6 covers the terminal of the skin 2g located around the stay body 4. An opening 6b1 is formed in the outer peripheral portion 6b. The opening 6b1 opens in the left-right center direction of the seat back 2. Therefore, in the state where the cap 6 is attached to the support body 5, the temporary locking groove 5c is visible through the opening 6b1.

  When the mounting structure 8 is assembled, the cable 7 is inserted from below the support body 5 as shown in FIG. As a result, the pin 7c moves while being guided by the guide groove 5b and the temporary locking groove 5c, and the pin 7c is temporarily locked by the second slit portion 5c2. As a result, the cable 7 is connected to the support body 5 so as not to drop off. In this state, the cap 6 can be inserted into the stay body 4 as shown in FIG. Then, the stay body 4 is inserted into the support body 5.

  4 and 5, the main locking groove 4b of the stay body 4 receives the pin 7c, and the pin 7c moves along the main locking groove 4b. The pin 7c moves up and down while rotating, and moves from the proximal end portion of the main locking groove 4b to the distal end portion. At the same time, the pin 7c moves from the second slit portion 5c2 of the temporary locking groove 5c to the first slit portion 5c1. As a result, the pin 7 c is locked in the main locking groove 4 b, and the cable 7 is locked and moved from the support body 5 to the stay body 4.

  As shown in FIGS. 1 and 3, the cap 6 is attached to the upper portion of the support body 5 after or before the stay body 4 is inserted into the support body 5. The pin 7 c and the temporary locking groove 5 c are located above the seat back 2. Therefore, it can be visually recognized from the outside that the pin 7c moves relative to the temporary locking groove 5c and the pin 7c is locked in the main locking groove 4b. The headrest 3 is attached to the seat back 2 by the attachment structure 8, and the cable 7 is locked to the stay body 4.

  Therefore, when the detection device 21 pulls the inner cable 7b, the upper end portion of the inner cable 7b is connected to the stay body 4 and cannot move, so the outer cable 7a is relatively upward with respect to the inner cable 7b. Moving. The distal end portion of the outer cable 7 a moves upward, thereby moving the stay body 4 upward and pushing up the operating rod 18 inserted through the stay body 4. As a result, the initial position holding mechanism 24 is released, and the moving member 11 moves forward by the urging force of the urging member 13 as shown in FIGS.

  As described above, the temporary locking groove 5c formed in the support body 5 is positioned above the seat back 2 as shown in FIG. Therefore, it can be confirmed above the seat back 2 that the pin 7c moves in the temporary locking groove 5c and is locked to the main locking groove 4b. Therefore, the operation of locking the cable 7 from the support body 5 to the stay body 4 can be visually confirmed, and the locking operation can be reliably performed.

  As shown in FIG. 3, the cap 6 has an opening 6 b 1 that opens a temporary locking groove 5 c formed in the support body 5. Therefore, even when the cap 6 is attached to the upper part of the support body 5, it can be visually recognized that the cable 7 is engaged and moved from the support body 5 to the stay body 4.

  The mounting structure 8 has a pair of support bodies 5 as shown in FIGS. The cap 6 has an opening 6b1 opening on the side between the support bodies 5. Therefore, the opening 6b1 is located at a position that is difficult to visually recognize from the outside of the sheet 1. Therefore, there is little possibility that the aesthetic appearance of the sheet 1 is impaired by the opening 6b1 of the cap 6.

  Further, as shown in FIGS. 2, 6, and 7, when the initial position holding mechanism 24 is unlocked by the release mechanism 25, the moving member 11 moves forward by the urging member 13. Therefore, the headrest 3 approaches the user's head seated on the seat 1 and can suppress the user's whipping and the like.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) In the above embodiment, the support body 5 has the temporary locking groove 5c, and the stay body 4 has the main locking groove 4b. However, the stay body may have a temporary locking groove and the support body may have a main locking groove.
(2) In the above embodiment, the stay body 4 is inserted into the support body 5. However, the support body may be inserted into the stay body.
(3) The cable 7 of the above embodiment has an inner cable 7b and an outer cable 7a, and a pin 7c is attached to the inner cable 7b. However, a form in which a pin is attached to the outer cable or a form in which the cable is a single wire and the pin is attached to the cable may be employed.
(4) The cable 7 of the above embodiment is a cable that transmits force. However, the cable may be a cable for carrying electricity.
(5) The support body 5 and the bracket 2e of the above embodiment are formed separately. However, the support body and the bracket may be integrally formed.
(6) The cap 6 and the support body 5 of the above embodiment are formed separately. However, the cap and the support body may be integrally formed.
(7) The temporary locking groove 5 c of the above embodiment is substantially entirely located above the seat cushion 2. However, only a part of the temporary locking groove 5c, for example, a part including the second slit portion 5c2 in which the pin 7c is temporarily locked may be positioned above the seat cushion 2.

It is a perspective view of a part of a vehicle seat. It is a disassembled perspective view of a headrest. It is a partial exploded perspective view of an attachment structure and a cable. It is a perspective view of an attachment structure and a cable when a cable is temporarily locked to a support body. It is a perspective view of an attachment structure and a cable when the cable is finally locked to the stay body. It is a cross-sectional left side view of the headrest when the moving member is held at the initial position. It is a cross-sectional left side view of a headrest when a moving member moves to a front position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Seat back 2a ... Frame 2e ... Bracket 3 ... Headrest 4 ... Stay body 4b ... Main locking groove 5 ... Support body 5b ... Guide groove 5c ... Temporary locking groove 5c1 ... First slit part 5c2 ... 2nd slit part 6 ... cap 6b1 ... opening 7 ... cable 7a ... outer cable 7a1 ... slit 7b ... inner cable 7c ... pin 8 ... mounting structure 9 ... seat cushion 10 ... base member 11 ... moving member 12 ... connecting link 13, 26, 27 ... Biasing member 20 ... Reclining device 21 ... Detection device 22 ... Connection mechanism 23 ... Slide mechanism 24 ... Initial position holding mechanism 25 ... Release mechanism

Claims (5)

A vehicle having a mounting structure for mounting a headrest to a seat back, the mounting structure including a stay body that extends from the headrest, and a support body that is provided on the seat back and in which the stay body is assembled in a nested manner. A sheet,
A cable having a pin, a temporary locking groove formed in one of the stay body and the support body and in which the pin is temporarily locked, and a book formed in the other of the two bodies The pin is received in the main locking groove by assembling both bodies in a nested manner, and the cable is locked from one of the two bodies to the other. Move and
The vehicle seat, wherein the temporary locking groove or the main locking groove formed in the support body is located above the seat back. The vehicle seat according to claim 1,
Having a cap attached to the top of the support body;
The vehicle seat according to claim 1, wherein the cap has an opening that opens a temporary locking groove or a main locking groove formed in the support body. The vehicle seat according to claim 2,
The mounting structure has a pair of support bodies,
The vehicle seat according to claim 1, wherein the cap has an opening that opens toward the support body. The vehicle seat according to any one of claims 1 to 3,
The cable has an inner cable provided with a pin and an outer cable provided with a slit through which the inner cable is inserted and the pin is movably inserted. The vehicle seat according to claim 4,
The headrest includes a base member attached to the stay, a moving member connected to the base member so as to move back and forth, a biasing member that biases the moving member forward with respect to the base member, and the movement An initial position holding mechanism that holds the member in an initial position with respect to the base member; and a release mechanism that interlocks with the outer cable, and the initial position holding mechanism is unlocked by the release mechanism, whereby the moving member Is moved forward by the urging member.

Images