JP2008195336A - Seat for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat for a vehicle allowing easy attaching/detaching of a headrest movable to the front in a collision to/from a seat back. <P>SOLUTION: An operation mechanism 20 moving a main body 16 to a front upper side in relation to a stay 17 is disposed in a headrest main body 16. A first wire 25 connected to the operation mechanism 20 and passed through the left stay 17 is connected to a joint 27. A slider 45 is vertically movably supported by a support case 39 vertically movably supported by the seat back 11. A second wire 58 of a driving mechanism 48 disposed in the seat back 11 is connected to the slider 45. By inserting/detaching the left stay 17 into/from a left support bracket 29, the left stay 17 and the support case 39 are connected or disconnected, and the joint 27 and the slider 45 are engaged or disengaged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat provided with a headrest.

In order to restrain an occupant's head at the time of a rear-end collision of a vehicle, a movable headrest device that moves the headrest forward at the time of collision has been proposed. For example, in Patent Document 1, a parallel link mechanism that moves the headrest forward is disposed inside the headrest. A wire having one end connected to the parallel link mechanism is passed through a hollow stay for mounting the headrest on the seat back of the vehicle seat and drawn into the seat back. In addition, a press plate that is pushed backward by an occupant being pressed against the seat back by a collision is disposed inside the seat back, and the other end of the wire is connected to a link member connected to the press plate. . That is, when the press plate is pushed and the link member is operated to pull the wire, the parallel link mechanism is operated and the headrest is moved forward.
JP 2005-104259 A

  In the configuration disclosed in Patent Document 1, since the parallel link mechanism and the link member are connected by a single wire, the headrest cannot be easily attached to and detached from the seat back. Therefore, for example, when the parallel link mechanism or the like is inspected or the headrest is replaced, the headrest can be removed only after the components are removed from the seatback to expose the link member and the wires are removed from the link member. Further, when the headrest is attached, it is necessary to attach the wire to the link member in a state where the headrest is attached to the seat back, and then attach the component parts to the seat back, which is inferior in maintainability. In addition, the headrest may be in the way when the seat back is tilted to a full flat, etc., but the headrest adopting the above-mentioned configuration cannot be easily removed by the occupant, so the seat arrangement is limited. be pointed out.

  That is, the present invention has been proposed to solve the above-described problems inherent in the conventional technology, and a headrest that can be moved forward in the event of a collision is easily used as a seat back. It aims at providing the vehicle seat which can be attached or detached to.

In order to solve the above-described problems and achieve the intended purpose, a vehicle seat according to the invention of claim 1 is provided:
In a vehicle seat comprising: a seat back; a headrest including a headrest body and a stay extending below the headrest body; and a support bracket disposed on the seatback and into which the stay is removably inserted.
An operating mechanism provided inside the headrest body and capable of moving the headrest body forward with respect to the stay;
One end is connected to the operating mechanism, and the other end is connected to the first connecting means that is inserted into the stay and located on the extending end side of the stay, and is pulled through the first connecting means. And a first linear body that operates the operating mechanism to move the headrest body forward,
It is provided inside the seat back so as to be displaceable in an engagement / disengagement direction with respect to the first connecting means, and the stay is inserted into a support bracket so as to be displaced in a direction of engaging with the first connecting means, and engaged. A second connecting means that is disengaged by being displaced in a direction of detachment from the first connecting means by pulling out the stay from the support bracket;
A second linear body having one end connected to the second connecting means;
A drive mechanism provided inside the seat back and connected to the other end of the second striated body and operating to pull the second striated body when pushed by an occupant;
The second connecting means engaged with the first connecting means moves so as to pull the first linear body together with the first connecting means when the second linear body is pulled by the operation of the drive mechanism, The operation mechanism is configured to operate.
According to the first aspect of the present invention, the linear member that connects the drive mechanism disposed in the seat back and the operating mechanism disposed in the headrest body is divided, and 2 is obtained by inserting and removing the stay with respect to the support bracket of the headrest. The book strips were connected and disconnected. Thereby, a headrest can be easily attached or detached with respect to a seat back. Therefore, maintainability is improved and various sheet arrangements can be handled.

According to a second aspect of the present invention, support means that is movable in the insertion / removal direction with respect to the support bracket of the stay is provided in the seat back, and the second connection means moves to the support means in the insertion / removal direction. Arranged freely,
The support means is detachably locked to a locking portion of the stay so that the support means moves integrally with the stay when the second connection means is engaged with the first connection means, The gist is to include a locked portion that is detached from the locking portion by pulling out the stay from the support bracket.
According to the invention of claim 2, since the support means provided with the second connecting means is configured to be able to move integrally with the stay, the height adjustment of the headrest is performed in a state where the two linear bodies are connected. Can be performed.

According to a third aspect of the present invention, the support means pushes down the support means while the first connection means comes into contact with a retracting portion that holds the second connection means in a standby posture separated from the first connection means. A displacement portion for displacing the second connection means in the standby posture to be engaged with the first connection means,
The gist of the present invention is to have elastic means for displacing the second connecting means to the standby posture when the second connecting means moves from the position facing the displacement part to the position facing the retracting part with respect to the support means.
According to the third aspect of the present invention, the first connecting means and the second connecting means can be easily engaged simply by pushing down the second connecting means with the first connecting means. Further, the second connecting means is moved by the elastic means by moving the second connecting means that engages with the first connecting means from the position facing the displacement section to the position facing the retracting section. Since the second connecting means is detached from the first connecting means, the second connecting means can be easily and reliably removed from the first connecting means.

In the invention according to claim 4, a guide unit that is fixed inside the seat back and supports the support unit so as to be movable in the insertion / removal direction of the stay;
The movement of the support means relative to the guide means in the insertion direction is restricted until the locked portion is locked to the locking portion of the stay inserted through the support bracket, and the locked portion is locked to the locking portion. A holding means for allowing movement of the support means in the insertion direction to the guide means later,
And a restricting means for restricting movement of the support means in the pulling direction with respect to the guide means when the stay is pulled out with respect to the support bracket, so that the locked portion can be detached from the locking portion. And
According to the fourth aspect of the present invention, the locked portion of the support means can be reliably locked to the locking portion of the stay while the support means is held by the holding means. Further, by restricting the movement of the support means by the restricting means, the locked portion of the support means can be reliably detached from the stay locking portion.

In the invention which concerns on Claim 5, the said holding means is
A holding portion formed on a holding piece provided on the guide means and elastically deformable in the approaching / separating direction with respect to the support means;
It is provided on the outer surface of the support means, and comprises a holding projection that can come into contact with the holding portion from above,
The regulating means is
A restriction edge provided in the guide means;
The gist of the invention is that it comprises a stopper protruding from the outer surface of the support means and capable of coming into contact with the restriction edge from below.
According to the fifth aspect of the present invention, it is possible to disengage and disengage the locked portion of the support means with respect to the stay locking portion with a simple configuration in which the holding means and the restriction edge are provided in the guide means and the holding portion and the stopper are provided in the support means. Can be performed reliably.

  According to the vehicle seat according to the present invention, the headrest can be easily attached to and detached from the seat back, the maintainability can be improved, and various seat arrangements can be handled.

  Next, preferred embodiments of the vehicle seat according to the present invention will be described below with reference to the accompanying drawings. In the following description, front / rear and left / right are designated when the vehicle seat is viewed from the front side as shown in FIG. 2 unless otherwise specified.

  A vehicle seat 10 according to the embodiment shown in FIG. 1 includes a seat cushion (not shown), a seat back 11, and a headrest 12 that is detachably mounted on an upper portion of the seat back 11.

(About headrest)
As shown in FIGS. 1 and 2, the headrest 12 includes a headrest main body 16 configured by covering the outer side of a hollow case body 13 with urethane 14 and a skin 15, and a pair of left and right stays 17 extending below the headrest main body 16. , 18. A pair of left and right through holes 13a and 13a are opened at the bottom of the case body 13 so as to penetrate inward and outward. Stays 17 and 18 are slidably inserted into the through holes 13a, and the headrest body 16 is configured to be movable with respect to the stays 17 and 18. A mounting member 19 is fixed between the stays 17 and 18 facing the inside of the case body 13, and an operating mechanism 20 that moves the headrest body 16 forward with respect to the stays 17 and 18 is attached to the mounting member 19. In the state shown in FIG. 1 (normal position), the portions of the stays 17 and 18 that face the inside of the case body 13 are formed so as to be inclined obliquely upward toward the front, and the headrests along the stays 17 and 18. The main body 16 moves to the front upper side.

  The actuating mechanism 20 is pivotally supported by the mounting member 19, and a part separated from the pivoting position is pivotally supported by the case body 13, and the mounting member 19 is pivotable. A hook 22 supported by the movable member 21 whose front end can be engaged and disengaged, and a torsion coil spring 23 as an elastic member that is disposed on the attachment member 19 and normally biases the movable member 21 toward the front upper side. Basically composed. The operating mechanism 20 is configured to hold the headrest body 16 in the normal position shown in FIG. 1 with the hook 22 engaged with the movable member 21.

  One end of a first wire (first wire) 25 in the first cable 24 is connected to the rear end of the hook 22. The first cable 24 includes a first outer tube 26 and the first wire 25 inserted through the tube 26. The left stay 17 (hereinafter simply referred to as the left stay) is a pipe that opens in the vertical direction, and the other end side of the first wire 25 led out from the first outer tube 26 is in the left stay 17. Is inserted from above.

  The other end of the first wire 25 is connected to a joint 27 as a first connecting means that is movable with respect to the left stay 17 so as to be integrally movable. As shown in FIGS. 3 and 4, the joint 27 has an engaging portion 27 a that extends forward at the lower end portion. Then, with the hook 22 engaged with the movable member 21 and holding the headrest body 16 in the normal position, the joint 27 is in the standby position where the engaging portion 27a protrudes from the lower opening end of the left stay 17. The first wire 25 is set to be held in a stretched state. The left stay 17 is formed with locking grooves (locking portions) 17a and 17a on both the left and right sides at a predetermined height above the lower opening end. Further, the joint 27 is in contact with the opening end of the left stay 17 so that the upward movement is restricted and is held at the standby position (see FIG. 5). Then, as will be described later, when the joint 27 is moved downward from the standby position and the first wire 25 is pulled, the hook 22 connected to one end of the wire 25 is rotated to engage with the movable member 21. Is configured to be released.

(About seat back)
The seat back 11 has an internal skeleton formed by a pair of left and right side frames (not shown), an upper frame 28 located on the upper side, a lower frame (not shown) located on the lower side, and the like. The outside is covered with a foam and a skin (both not shown). As shown in FIG. 2, a pair of support brackets 29 and 29 are fixed to the horizontal portion 28 a extending in the left-right direction of the upper frame 28 so as to be separated from each other in the left-right direction. Each support bracket 29 has a cylindrical shape that allows the stays 17 and 18 to be inserted in the vertical direction, and is provided with a grommet 29 a at the upper end. A positioning spring (not shown) is disposed inside the support bracket 29. The stays 17 and 18 are formed with a plurality of adjustment grooves (not shown) spaced apart in the vertical direction. The height of the headrest 12 relative to the seat back 11 can be adjusted by engaging the positioning springs in the adjustment grooves of the stays 17 and 18 inserted through the support bracket 29 so as to be detachable. In the following description, when the left and right support brackets 29 are distinguished, they are referred to as a left support bracket and a right support bracket.

(Guide means)
The right support bracket 29 is directly fixed to the horizontal portion 28a, whereas the left support bracket 29 is fixed to the guide means 30 fixed to the horizontal portion 28a. The guide means 30 is basically composed of a first guide member 31 located on the front side and a second guide member 32 located on the rear side. As shown in FIGS. 3 and 4, the first guide member 31 is formed with a main body portion 34 that curves in the forward direction at the lower end of the mounting portion 33 that extends in the vertical direction and is fixed to the horizontal portion 28 a. ing. The left support bracket 29 is fixed to the attachment portion 33 with the lower end facing the upper portion of the main body portion 34. The main body 34 is provided with a through hole 34 a penetrating vertically at a position facing the lower side of the left support bracket 29. The through hole 34a functions to allow the left stay 17 inserted through the left support bracket 29 to pass below the main body 34 (see FIGS. 4B, 5B, and 6).

  A support portion 35 is bent at the lower end of the main body portion 34 of the first guide member 31 so as to extend downward by a predetermined length. The support portion 35 is formed with a first restricting cutout portion 35a that opens to the lower end side. The second guide member 32 is fixed to the back side of the support portion 35. As shown in FIG. 3, the second guide member 32 includes support side plates 37, 37 bent toward the front side on the left and right side edges of the back plate 36 formed in a rectangular shape. At the front end edge, flanges 37b bent outward are formed. Both flanges 37b and 37b are fixed to the support portion 35, and a space S opened vertically by the support portion 35 and the second guide member 32 is defined below the through hole 34a. In addition, the part which defines the space S in the guide means 30 has a rectangular tube shape capable of guiding a rectangular tube-shaped support case 39 described later without changing its posture. Further, the back plate 36 of the second guide member 32 is formed so that the second restriction notch 36a is opened to the lower end side symmetrically with the first restriction notch 35a of the support portion 35.

  Each support side plate 37 in the second guide member 32 is formed with a pair of slits 37a, 37a that extend in the vertical direction and open upward and are spaced apart in the front-rear direction. A holding piece 38 that is elastically deformable in the left-right direction (inward / outward direction and in the proximity / separation direction with respect to the support case 39 accommodated in the space S) is formed therebetween. At the upper end of the holding piece 38, a holding portion 38a is formed that is bent inward in a substantially square shape. A holding projection 44 (described later) of the support case 39 is configured to be able to contact the upper side of the holding portion 38a.

(About support cases)
A support case 39 as a support means is accommodated and supported in the space S defined by the guide means 30 so as to be movable in the vertical direction (the insertion and removal direction of the left stay 17 with respect to the left support bracket 29). As shown in FIG. 3, the support case 39 is formed in a rectangular tube shape that opens in the vertical direction, and stoppers 41, 41 that extend outward (front or rear) are formed on the outer surfaces of the lower ends of the front and rear walls 40, 40. Projected separately from each other on the left and right. When the support case 39 moves up and down in the space S, the stoppers 41 and 41 move up and down in the first or second restriction notches 35a and 36a. Further, the stoppers 41 and 41 come into contact with the restriction edges 35b and 36b, which are the upper edges of the first and second restriction notches 35a and 36a, from the lower side, so that the support case 39 moves upward (the left support bracket 29 The movement of the left stay 17 in the pulling direction with respect to the movement is regulated (see FIG. 4). That is, in the embodiment, the stoppers 41 and 41 and the restriction edges 35b and 36b of the restriction notches 35a and 36a constitute restriction means. The position where the upward movement of the support case 39 is regulated by the stoppers 41 and 41 and the regulation edges 35b and 36b is set as the upper limit position.

  As shown in FIG. 3, a pair of slits 42a, 42a extending in the vertical direction and opening upward are spaced apart in the front-rear direction at the upper ends of the left and right walls 42, 42 in the support case 39. A locking piece 43 is formed between the slits 42a and 42a and can be elastically deformed in the left-right direction (inside and outside direction). At the upper end of each locking piece 43, a locking piece part 43 a is formed as a locked part bent inward, and the corresponding locking piece 43 a is formed on the left stay 17. It is configured to be detachably locked in the stop groove 17a. In addition, holding projections 44, 44 project from the outer surfaces of the left and right walls 42, 42 on both the front and rear sides of the locking piece 43. The holding protrusion 44 is formed to protrude in a triangular shape. When the stoppers 41, 41 of the support case 39 come into contact with the regulation edges 35b, 36b of the regulation notches 35a, 36a from below, as shown in FIG. The inclined surface is in contact with the holding portion 38a of the holding piece 38 from the upper side so that the support case 39 can be held at the upper limit position. That is, in the embodiment, the holding protrusion 44 and the holding portion 38a constitute a holding means. The positions where the stoppers 41 and 41 abut against the regulation edges 35b and 36b may be positions where the holding projection 44 can face above the holding portion 38a.

  Here, the elasticity of the holding pieces 38, 38 is such that the holding case 38a, 38a is brought into contact with the holding projections 44, 44 from the upper side to hold the support case 39 in the upper limit position, and the locking pieces 43a, It is set so that 43a is held at the upper limit position until it is locked in the locking grooves 17a, 17a of the left stay 17. However, when the support case 39 connected to the left stay 17 is further pushed down, the holding pieces 38 and 38 are expanded to allow the holding protrusions 44 and 44 to pass therethrough.

(About the slider)
In the left and right walls 42, 42 of the support case 39, guide holes 42b, 42b extending in the vertical direction are formed. In the support case 39, a slider 45 is accommodated as a second connecting means that is movable along the guide holes 42b and 42b. As shown in FIG. 5, the slider 45 has shaft portions 46a and 46a projecting from the left and right sides of the main body 46 facing the guide holes 42b and 42b. Further, the main body 46 is formed with an engaging recess 46b that engages with a fitting 60 disposed at one end of a second wire (second linear member) 58 described later. And the one end part side of the 2nd wire 58 engaged with the engaging recessed part 46b via the attachment metal fitting 60 is comprised so that it may move up and down integrally with the vertical movement of the slider 45. As shown in FIG.

  An engagement protrusion 47 formed in an inverted L shape is provided on the front upper surface of the main body 46 in the support case 39 so as to protrude upward. An engaged portion 47a protruding rearward at the rear surface upper portion of the engaging protrusion 47 is configured to engage with and disengage from the engaging portion 27a of the joint 27. The main body 46 is formed with an elastic piece (elastic means) 46c extending obliquely downward toward the front on the front side below the shaft portions 46a, 46a. With the elastic piece 46c elastically contacting the inner surface of the front wall 40 of the support case 39, the slider 45 has the engagement projection 47 at the front side, that is, the engagement of the joint 27 with the shaft portions 46a and 46a as the center. The portion 27a is urged to rotate (displace) in a direction in which the engaged portion 47a is disengaged.

  On the upper side of the front wall 40 in the support case 39, a notch 40 a is formed as a retracting portion that opens upward with a width dimension corresponding to the engagement protrusion 47 in the slider 45. Then, in the standby posture (see FIG. 4A) in which the engaging protrusion 47 is rotated forward via the notch 40a, the engaged portion 47a is disengaged from the engaging portion 27a of the joint 27. It is like that. The main body 46 is provided with a contact portion 46d that extends rearward from the engagement protrusion 47 in a state of facing the standby posture. Then, the joint 27 abuts on the abutting portion 46d from above and the slider 45 is pushed down, so that the engaging projection 47 is a lower edge of the notch 40a in the front wall 40 and the wall. When the slider 45 comes into contact with the inner surface of 40, the slider 45 rotates rearward against the elastic force of the elastic piece 46c, and the engaged portion 47a engages with the engaging portion 27a of the joint 27 (FIG. 4). (see (b)). That is, in the embodiment, the contact edge 40b of the notch 40a in the support case 39 functions as a displacement part that displaces the slider 45 from the standby position to the engaged position.

(About drive mechanism)
A drive mechanism 48 for operating the operating mechanism 20 is disposed in the seat back 11. As shown in FIG. 1, the drive mechanism 48 is located in the seat back 11 so as to be positioned behind the waist of the occupant (seat) and a position facing the rear surface of the pressure member 49. The base member 50 is basically composed of a plate spring 51 disposed on the base member 50, and a second cable 52 connected to the plate spring 51.

  The pressure receiving member 49 is attached to a holding member 53 disposed between the side frames. When the seat back 11 is pushed by an occupant during a vehicle collision or the like, the pressure receiving member 49 is moved from the front position to the rear side. It is configured to move toward the position (see FIGS. 1 and 8). The pressure receiving member 49 is provided with a pressing portion 49a that protrudes rearward.

  The base member 50 is disposed on the lower frame. The base member 50 is formed in a U-shape that opens forward in plan view, and the left and right side plates 54, 54 are formed with elongated holes 54a, 54a extending in the vertical direction on the lower end side. As shown in FIG. 2, a support shaft 55 is installed on the upper end side of both side plates 54, 54, and the upper end portion of the leaf spring 51 is supported on the support shaft 55. The lower end of the leaf spring 51 is attached to a movable shaft 56 that is movably inserted in the long holes 54a and 54a. The lower end of the leaf spring 51 is movable in the extending direction of the long holes 54a and 54a. It is configured to be movable together with the shaft 56. As shown in FIG. 1, the leaf spring 51 is held in a posture in which the space between the upper and lower ends is curved in an arc toward the front in a no-load state. At this time, the movable shaft 56 is located on the upper end side of the long holes 54 a and 54 a. I'm here. Further, as shown in FIG. 2, a notch 51a is formed at the lower end of the leaf spring 51 at the center in the left-right direction.

  The second cable 52 includes a second outer tube 57 and the second wire 58 inserted through the tube 57, and the upper end (one end) of the second outer tube 57 is connected to the bottom of the support case 39. In addition, the lower end (the other end) of the tube 57 is connected to a bracket 59 disposed at the upper end of the base member 50. A mounting bracket 60 is disposed at one end of the second wire 58 led out from the upper end of the second outer tube 57, and the mounting bracket 60 is engaged with the engagement recess 46b of the slider 45 (FIG. 4A). FIG. 5 (a) and FIG. 7 (a)). A connecting tool 61 is disposed at the other end of the second wire 58 led out from the lower end of the second outer tube 57, and the connecting tool 61 is located at a position corresponding to the notch 51 a of the leaf spring 51. It is connected to the. And the 2nd wire 58 is hold | maintained in the tension | tensile_strength in the attitude | position where the leaf | plate spring 51 is curving ahead, as shown in FIG. That is, the leaf spring 51 is pushed rearward by the pressing portion 49a of the pressure receiving member 49 and deformed in the direction in which the leaf spring 51 extends, and the second wire 58 is pulled downward as the movable shaft 56 moves downward. Thus, the slider 45 is configured to move downward (see FIG. 8).

(Effects of Example)
Next, the operation of the vehicle seat according to the embodiment will be described.

(Attaching the headrest)
In a state before the headrest 12 is attached to the seat back 11, as shown in FIG. 5A, the support case 39 accommodated in the space S of the guide means 30 has the holding projections 44, 44 having the second guide members. The support case 39 is held at the upper limit position by coming into contact with the 32 holding portions 38a, 38a from above. At this time, as shown in FIG. 4A, the slider 45 accommodated in the support case 39 is held in a standby posture in which the engagement protrusion 47 is rotated forward via the notch 40a. On the other hand, the joint 27 disposed on the headrest 12 is held at a standby position where the engaging portion 27 a extends from the left stay 17 in a state where the joint 27 is in contact with the opening end of the left stay 17 and is regulated.

  The headrest 12 is attached to the seat back 11 by inserting the stays 17 and 18 of the headrest 12 into the corresponding support brackets 29 and 29 from above in the state described above. In the left stay 17, as shown in FIGS. 4B and 5B, the joint 27 is inserted into the support case 39 through the through hole 34 a of the first guide member 31, and the joint 27 is The contact portion 46d of the slider 45 in the standby posture contacts from above. At this time, the support case 39 holds the joint 27 (the left stay 17) further because the holding projections 44, 44 are held at the upper limit position by contacting the holding portions 38a, 38a of the second guide member 32 from above. When moved downward, only the slider 45 moves downward with respect to the support case 39. That is, as the slider 45 moves downward, the front portion of the engagement protrusion 47 is pressed against the contact edge 40b of the notch 40a, so that the slider 45 rotates so that the engagement protrusion 47 moves rearward. . As a result, the engaged portion 47 a of the engaging protrusion 47 is engaged with the engaging portion 27 a of the joint 27. At this time, the locking pieces 43 a and 43 a of the support case 39 are locked to the locking grooves 17 a and 17 a of the left stay 17 so that the support case 39 can move integrally with the left stay 17. Connected. That is, the slider 45 is engaged with the joint 27 and the support case 39 is held so as not to move with respect to the guide means 30 until the support case 39 is connected to the left stay 17. Accordingly, the engagement between the joint 27 and the slider 45 and the connection between the left stay 17 and the support case 39 can be reliably performed. Moreover, since the holding means for holding the support case 39 has a simple configuration comprising the holding portion 38a provided on the guide means 30 and the holding projection 44 provided on the support case 39, the number of parts increases and the structure is complicated. It will never be.

  As described above, in the state where the left stay 17 and the support case 39 are connected via the locking grooves 17a and 17a and the locking pieces 43a and 43a, the relative position between the left stay 17 and the support case 39 changes. There is nothing. Therefore, the engaged state between the joint 27 and the slider 45 which are engaged when the both 17 and 39 are connected is also maintained. Then, due to the engagement between the joint 27 and the slider 45, the operating mechanism 20 disposed inside the headrest body 16 and the drive mechanism 48 disposed inside the seat back 11 are connected to the first wire 25 and The second wires 58 are connected.

  When the left stay 17 is moved further downward, the holding pieces 38, 38 of the second guide member 32 are expanded by the holding protrusions 44, 44 of the support case 39 that moves integrally with the left stay 17, The holding protrusions 44, 44 move below the holding portions 38a, 38a. In this state, as described above, the support case 39 is connected to move integrally with the left stay 17 while maintaining the engagement between the joint 27 and the slider 45. Therefore, even if the stays 17 and 18 are moved up and down relative to the support brackets 29 and 29 to adjust the height of the headrest 12 with respect to the seat back 11, the engagement between the joint 27 and the slider 45 is not released. (See FIG. 6). That is, the height adjustment of the headrest 12 can be performed without any trouble while the operating mechanism 20 and the drive mechanism 48 are connected by the first wire 25, the second wire 58, the joint 27, and the slider 45. Note that the distance between the support case 39 and the drive mechanism 48 changes due to the vertical movement of the support case 39 accompanying the height adjustment of the headrest 12. However, this change is absorbed by the flexibility of the second outer tube 57 of the second cable 52, and the second wire 58 is not pulled downward.

(Removing the headrest)
When removing the headrest 12 from the seat back 11, the headrest body 16 is lifted to pull out the stays 17 and 18 from the support brackets 29 and 29. In this case, in the left stay 17, the support case 39 connected to the left stay 17 is pulled up integrally. The upper inclined surfaces of the holding projections 44 and 44 abut against the holding portions 38a and 38a of the second guide member 32 from the lower side to expand the holding pieces 38 and 38, and the holding projections 44 and 44 hold the holding projections 44 and 44. It reaches above the pieces 38,38. At this time, the stoppers 41 and 41 of the support case 39 abut against the regulation edges 35b and 36b of the regulation notches 35a and 36a in the guide means 30 from below, and the upward movement of the support case 39 is regulated. If the left stay 17 is further lifted in this state, only the left stay 17 moves relative to the support case 39 that is restricted in movement. As a result, the locking pieces 43 and 43 of the support case 39 are pushed and expanded by the left stay 17, and the locking pieces 43 a and 43 a are detached from the locking grooves 17 a and 17 a to connect the left stay 17 and the support case 39. Is released. At this time, only the slider 45 engaged with the joint 27 is pulled up with respect to the support case 39 whose movement is restricted. Then, when the engagement protrusion 47 reaches the position facing the notch 40a, the slider 45 is rotated so that the engagement protrusion 47 moves forward by the elastic force of the elastic piece 46c, and the standby position is obtained. The engagement between the slider 45 and the joint 27 is released. Therefore, after that, the left stay 17 is pulled out from the left support bracket 29. That is, the stopper 41, 41 provided on the support case 39 is simply connected to the regulation edges 35b, 36b provided on the guide means 30 from the lower side, and the connection of the support case 39 to the left stay 17 is ensured. It can be canceled. Further, since the slider 45 is automatically detached from the joint 27 by the elastic force of the elastic piece 46c, it is not necessary to separately provide a means for releasing the engagement, and the engagement can be reliably released with a simple configuration.

  The support case 39 released from the connection with the left stay 17 is held at the upper limit position with the holding projections 44 and 44 coming into contact with the holding portions 38a and 38a of the second guide member 32 from above. Accordingly, when the headrest 12 is removed from the seat back 11, the support case 39 moves downward from the upper limit position, and it becomes a state that hinders the next engagement between the joint 27 and the slider 45. Is prevented.

(Operation at the time of collision)
When the headrest 12 is attached to the seat back 11 and the occupant is pressed against the seat back 11 at the time of a vehicle collision, the pressure receiving member 49 is pushed backward by the load input to the seat back 11 from the vicinity of the occupant's waist. It is. When the pressure receiving member 49 presses the leaf spring 51, the leaf spring 51 is elastically deformed so as to extend in a direction in which the lower end portion is separated from the upper end portion. Accordingly, the movable shaft 56 moves downward along the long holes 54 a and 54 a, whereby the second wire 58 is pulled downward via the connector 61. When the second wire 58 is pulled, only the slider 45 moves downward with respect to the support case 39 connected to the left stay 17, as shown in FIG. The wire 25 is pulled downward. Then, when the hook 22 is rotated by the first wire 25 and the engagement with the movable member 21 is released, the movable member 21 is rotated toward the front upper side by the elastic force of the torsion coil spring 23. Accordingly, the headrest body 16 moves forward and upward along the pair of stays 17 and 18 to support the occupant's head.

  When the movable member 21 is engaged with the hook 22 by returning the headrest body 16 moved to the upper front side to the normal position, the leaf spring 51 is in the original posture when the movable member 21 is engaged with the hook 22. Return to the state before the operation by returning to the elastic state (see FIG. 7A).

  That is, in the vehicle seat 10 of the embodiment, the joint mechanism 27 that connects the operating mechanism 20 disposed in the headrest body 16 and the drive mechanism 48 disposed in the seat back 11 to the first wire 25; Since it is configured such that it can be detachably connected via the slider 45 connected to the second wire 58, the headrest 12 can be easily detached from or attached to the seat back 11 as necessary. Accordingly, various seat arrangements can be handled, and maintenance such as replacement of the headrest 12 can be easily performed. In the embodiment, since the first wire 25 and the joint 27 are disposed only on one (left side) stay 17 of the headrest 12, the number of components is reduced compared to the case where both the stays are provided as in the prior art. Therefore, the cost can be reduced.

  Further, the joint 27 and the slider 45 can be engaged and disengaged with one touch by simply inserting and removing the stays 17 and 18 with respect to the support brackets 29 and 29. There is no need for this, and the operation is extremely simple. In the embodiment, the slider 45 and the support case 39 connected to the joint 27 and the left stay 17 are accommodated in the guide means 30 fixed to the upper frame 28 so as to be movable up and down. Therefore, the connecting parts such as the slider 45 and the support case 39 are protected by the guide means 30, and the connecting parts can be prevented from being damaged or dropped off.

[Another Example]
FIG. 9 shows another embodiment of the first and second connecting means, and only the parts different from the above-described embodiment will be described. In addition, the same code | symbol shall be attached | subjected to the same member, the same part, etc. as an Example.

  As shown in FIG. 9, the joint 62 as the first connecting means has a substantially cylindrical portion protruding from the lower opening end of the left stay 17 in the standby position, and a circumferential groove is formed in the portion. An engaging portion 62a is provided. On the other hand, the slider 63 as the second connecting means has an elastic piece portion 64 at the front and rear lower ends of the main body 46 movably disposed on the support case 39 via shaft portions 46a and 46a projecting on the left and right sides. Are formed respectively. Both elastic piece parts 64 and 64 always contact the inner surfaces of the front and rear walls 40 and 40 in the support case 39, and function to stably move the slider 63 up and down. The main body 46 is formed with an engaging recess 46b to which the mounting bracket 60 of the second wire 58 is engaged, and the one elastic piece 64 has a passage 64a that allows the second wire 58 to be inserted and removed. Is formed.

  Engaging protrusions 65 that are elastically deformable and extend obliquely upward toward the front side or the rear side are provided on the front and rear surfaces of the main body 46, respectively. Engaged portions 65 a and 65 a projecting inward are formed on upper portions of the opposing inner surfaces (front and rear surfaces) of the both engaging projections 65 and 65. The engaged portions 65a and 65a are configured to be detachably engaged with the engaging portion 62a of the joint 62. In another embodiment, the elastically deformable engaging protrusion 65 itself functions as an elastic means for displacing the engaging protrusion 65 to a standby posture.

  In another embodiment, notches 40a and 40a are formed on the upper side of the front and rear walls 40 and 40 of the support case 39 as a retracting portion. In the standby posture (see FIG. 9A) in which the engaging protrusions 65, 65 extend forward or rearward through the notches 40a, 40a, the engaged portion 65a with respect to the engaging portion 62a of the joint 62 is provided. , 65a are disengaged. Further, the upper surface between the engaging protrusions 65, 65 is a contact portion 46d on the main body 46, and the joint 62 is brought into contact with the contact portion 46d from above and the slider 63 is pushed down. When the engagement protrusions 65, 65 abut on the contact edges 40b, 40b, which are the lower edges of the notches 40a, 40a in the front and rear walls 40, 40, and the inner surfaces of the walls 40, 40, the engagement protrusions 65 and 65 elastically deform (displace) inward against its own elasticity. As a result, the engaged portions 65a and 65a are configured to be engaged with the engaging portion 62a of the joint 62 (see FIG. 9B).

  That is, also in another embodiment, just by pushing down the slider 63 with the joint 62, the pair of engaged portions 65a, 65a in the slider 63 engage with the engaging portion 62a, and the slider 63 is connected to the joint 62. . Further, by lifting the joint 62, the slider 63 is lifted with respect to the support case 39 whose movement is restricted as in the embodiment. Then, when the engagement protrusions 65, 65 reach a position facing the cutout portions 40a, 40a of the support case 39, the engagement protrusions 65a, 65 are engaged with the engaged portions 65a, 65a from the engagement portion 62a. Returning to the separated standby posture, the connection between the joint 62 and the slider 63 is released.

[Example of change]
The present application is not limited to the configurations of the above-described embodiments and other embodiments, and other configurations can be appropriately employed.
1. The operation mechanism is not limited to the configuration of the embodiment, and other configurations such as a configuration in which the first link is pulled to operate the parallel link mechanism to move the headrest body forward can be adopted.
2. The drive mechanism is not limited to the configuration of the embodiment, and other configurations such as a configuration that pulls the second wire by operating the link mechanism when the pressure receiving member is pushed rearward can be adopted.
3. In the embodiment, the wire is exemplified as the linear body, but the wire is not limited to this, and any wire that can transmit a tensile force such as a string or a belt-like member may be used.
4). In the embodiment, the case where the headrest is configured to be height-adjustable has been described, but a configuration in which the headrest is attached to a fixed position with respect to the seat back may be employed. In this case, a configuration in which the slider is not moved in the stay insertion / removal direction may be employed. For example, a slider is rotatably arranged at a fixed position, and is rotated by pushing the joint to engage with the joint, and is rotated in the reverse direction by pulling out the joint to release the engagement with the joint. To be. Further, it may be configured such that when the second wire is pulled while being engaged with the joint, the slider further rotates in the direction of pulling down the joint.
5. In the embodiment, the cutout portion is used as the evacuation portion. However, the present invention is not limited to this, and other configurations such as a concave portion may be used as long as the slider can permit the standby posture.
6). In the embodiment, the elastic piece integrally formed with the slider is exemplified as the elastic means. However, the elastic piece is not limited to this, and the direction in which the slider is always in the standby posture by another means such as a torsion spring or rubber as another member. As long as it is energized. In another embodiment, the engaging protrusion itself that engages with the joint is an elastic means. However, the engaging protrusion is pivoted with respect to the main body so that the engaging protrusion is twisted by another member. It is possible to adopt a configuration in which the elastic member is always urged in a standby posture direction by other elastic means such as a spring or rubber.
7). In the embodiment, the guide means is described as having a configuration in which the second guide member is fixed to the first guide member, but the guide means may be constituted by one member. The shape of the guide means is not limited as long as it can guide the support case, and the portion in which the support case is accommodated does not have to be a rectangular tube.
8). In the embodiment, the case where the headrest is configured to be attached to the seat back by two stays has been described, but a configuration in which the headrest is attached by one stay may be employed.
9. In another implementation, an elastic piece for stabilizing the vertical movement of the slider is provided at the front and rear lower ends of the slider as the second connecting means, but the elastic piece can be omitted. In other words, the slider is only required to be provided with a pair of engaging projections on the front and rear surfaces of the main body so as to be elastically deformable in the front and rear direction.

  The vehicle seat according to the present invention has a headrest provided with an operating mechanism for moving a headrest body attached to the seatback via a stay forward by operating a drive mechanism provided inside the seatback. It can implement suitably for all provided with.

FIG. 4 is a schematic side view illustrating a part of the internal structure of the vehicle seat according to the embodiment in a state in which the headrest body is held in a normal position. It is a schematic front view which shows partially the internal structure of the vehicle seat which concerns on an Example in the state in which the headrest main body is hold | maintained in the normal position. It is a schematic perspective view which decomposes | disassembles and shows the mechanism part which connects the 1st wire and 2nd wire which concern on an Example. It is a principal part vertical side view which shows the mechanism part which connects the 1st wire and 2nd wire which concern on an Example, (a) shows the state before engaging a slider with a joint, (b) is a joint. Shows a state of engaging with the slider. BRIEF DESCRIPTION OF THE DRAWINGS It is a principal part longitudinal front view which shows the mechanism part which connects the 1st wire and 2nd wire which concern on an Example, (a) shows the state before engaging a slider with a joint, (b) is a joint. Shows a state of engaging with the slider. It is a principal part vertical side view which shows the mechanism part which connects the 1st wire which concerns on an Example, and a 2nd wire, Comprising: With a joint and a slider engaging, the height of a headrest is adjusted and left stay And the support case move together. It is a principal part longitudinal front view which shows the mechanism part which connects the 1st wire which concerns on an Example, and a 2nd wire, Comprising: (a) is a state with a 1st wire and a 2nd wire in the state which the joint and the slider engaged. Shows a state before is pulled, and (b) shows a state where the first wire and the second wire are pulled. FIG. 3 is a schematic side view illustrating a part of the internal structure of the vehicle seat according to the embodiment in a state in which the headrest main body is moved forward and upward. It is a principal part vertical side view which shows the mechanism part which connects the 1st wire and 2nd wire which concern on another Example, (a) shows the state before engaging a slider with a joint, (b) The joint is engaged with the slider.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Seat back, 16 Headrest main body, 17 Left stay 17a Locking groove (locking part), 20 Actuation mechanism, 25 1st wire (1st wire body)
27 joint (first connecting means), 29 support bracket, 30 guide means 35b regulating edge (regulating means), 39 support case (supporting means)
38a Holding part (holding means), 40a Notch part (retracting part), 40b Contact edge (displacement part)
41 Stopper (regulating means), 43a Locking piece (locked part), 44 Holding protrusion (holding means)
45 Slider (second connecting means), 46c Elastic piece (elastic means), 48 Drive mechanism 58 Second wire (second linear body), 62 Joint of another embodiment (first connecting means)
63 Slider (second connecting means), 65 Engaging protrusion (elastic means) of another embodiment

Claims (5)

In a vehicle seat comprising: a seat back; a headrest including a headrest body and a stay extending below the headrest body; and a support bracket disposed on the seatback and into which the stay is removably inserted.
An operating mechanism provided inside the headrest body and capable of moving the headrest body forward with respect to the stay;
One end is connected to the operating mechanism, and the other end is connected to the first connecting means that is inserted into the stay and located on the extending end side of the stay, and is pulled through the first connecting means. And a first linear body that operates the operating mechanism to move the headrest body forward,
It is provided inside the seat back so as to be displaceable in an engagement / disengagement direction with respect to the first connecting means, and the stay is inserted into a support bracket so as to be displaced in a direction of engaging with the first connecting means, and engaged. A second connecting means that is disengaged by being displaced in a direction of detachment from the first connecting means by pulling out the stay from the support bracket;
A second linear body having one end connected to the second connecting means;
A drive mechanism provided inside the seat back and connected to the other end of the second striated body and operating to pull the second striated body when pushed by an occupant;
The second connecting means engaged with the first connecting means moves so as to pull the first linear body together with the first connecting means when the second linear body is pulled by the operation of the drive mechanism, A vehicle seat configured to operate the operating mechanism. Support means movable in the insertion / removal direction with respect to the support bracket of the stay is provided inside the seat back, and the second connection means is disposed on the support means so as to be movable in the insertion / removal direction,
The support means is detachably locked to a locking portion of the stay so that the support means moves integrally with the stay when the second connection means is engaged with the first connection means, The vehicle seat according to claim 1, further comprising a locked portion that is detached from the locking portion by pulling out the stay from the support bracket. The supporting means includes a retracting portion for holding the second connecting means in a standby posture separated from the first connecting means, and a second connecting means in a standby posture in which the first connecting means abuts and is pressed down against the supporting means. And a displacement portion that displaces the engagement position with respect to the first connecting means.
3. The vehicle according to claim 2, further comprising elastic means for displacing the second connecting means to a standby posture when the second connecting means moves from a position facing the displacement part to a position facing the retracting part with respect to the support means. Sheet. Guide means fixed inside the seat back and supporting the support means movably in the stay insertion / removal direction;
The movement of the support means relative to the guide means in the insertion direction is restricted until the locked portion is locked to the locking portion of the stay inserted through the support bracket, and the locked portion is locked to the locking portion. A holding means for allowing movement of the support means in the insertion direction to the guide means later,
3. A restricting means for restricting movement of the support means in the pulling direction with respect to the guide means when the stay is pulled out from the support bracket, thereby enabling the locked portion to be detached from the locking portion. Or the vehicle seat of 3. The holding means is
A holding portion formed on a holding piece provided on the guide means and elastically deformable in the approaching / separating direction with respect to the support means;
It is provided on the outer surface of the support means, and comprises a holding projection that can come into contact with the holding portion from above,
The regulating means is
A restriction edge provided in the guide means;
The vehicle seat according to claim 4, further comprising a stopper protruding from an outer surface of the support means and capable of coming into contact with the restriction edge from below.

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