JP2008253336A - Headrest and vehicle seat with this headrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headrest which can be put in a head supporting condition and a storage condition by being inclined from the head supporting condition, can provide a good appearance, is very versatile and prevents the end portion of a skin material from coming off, and to provide a vehicle seat with the headrest. <P>SOLUTION: The headrest has a pillar 1 mounted on the upper portion of a backrest seat S2, front and rear cover members 70 having insertion portions 70d and 70e through which the leg portions 11 of the pillar 1 are inserted, a skin material 9 formed into a bag and covering the front and rear cover members 70, right and left skin stopping cover members 74 and 75 engaging into the insertion portions 70d and 70e of the front and rear cover members 70 and pinching the skin material 9 located on the peripheries of the insertion portions 70d and 70e, and a padding material 8 integrally molded with the skin material 9 and the front and rear cover members 70. The front and rear cover members 70 have an opening portion 70f making the right and left insertion portions 70d and 70e communicate with each other, and the end portions 91 of the skin material 9 located in the opening portion 70f are tucked into the opening portion 70f. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a headrest and a vehicle seat provided with the headrest, and in particular, a head support state raised from a backrest seat and a tilted state from the head support state to a retracted state. The present invention relates to a headrest and a vehicle seat including the headrest.

  In general, a headrest for protecting the head of an occupant is mounted on an upper portion of a backrest seat of a vehicle seat. Conventionally, the front cover is built in the inner cover, a support cylinder with a locking hook is integrally provided in the insertion part of the inner cover, and a holding piece with a locking claw to be locked to the locking hook is provided. The inner cover insertion part is closed by the provided outer cover, and the terminal of the opening part of the epidermis is clamped by the clamping piece, so that the foaming liquid for pad foam molding injected into the epidermis is prevented from leaking to the outside. A technique described above has been proposed (see Patent Document 1). The headrest is configured to seal the skin by engaging the upper end of the sandwiching piece of the outer cover with the engagement groove of the inner cover.

JP 2000-38072 A (paragraphs 0013 to 0019, FIG. 2)

However, the headrest described in Patent Document 1 is provided with an engagement cover portion and an engagement groove formed in the insertion portion of the inner cover, and a clamping piece and an engagement claw formed on the outer cover, so that each cover member is It is formed in a complicated shape, and there is a problem that production work efficiency is lowered in forming each cover member.
Further, since the support cylinder protruding outward is formed in the insertion portion of the inner cover, the lower portion of the headrest is formed so as to protrude, and there is room for improvement in appearance merchandise.

  An object of the present invention is to provide a headrest capable of obtaining a good appearance and a vehicle seat including the headrest. Another object of the present invention is to provide a headrest that is excellent in versatility and in which a skin material terminal portion is prevented from coming off and a vehicle seat including the headrest.

  According to the headrest according to claim 1, the subject is a head support state that is raised with respect to the dorsal seat, and a headrest that can be tilted from the head support state to be in a retracted state. A support member having at least a leg portion mounted on an upper portion of the dorsal seat; an insertion portion for inserting the leg portion of the support member; and a front and rear cover member sandwiching the support member; A skin material that covers the cover member, left and right skin stopper cover members that fit into the insertion portion of the front and rear cover members and sandwich the skin material that is positioned at the periphery of the insertion portion, the skin material, and the front and rear cover members A pad material that is integrally formed with the skin material and the front and rear cover members by foamed resin injected between the front and rear cover members, the front and rear cover members are formed with openings that communicate the left and right insertion portions; Terminal portion of the skin material is located in the opening, becoming been written grain in the opening, it is solved by.

  As described above, the headrest of the present invention is formed with the insertion portion that inserts the leg portion of the support member into the front and rear cover members, and the opening portion that communicates the left and right insertion portions, and the terminal portion of the skin material that is located in the opening portion. Is cut into the opening, and the skin material located at the periphery of the insertion portion is sandwiched between the left and right skin stopper covers. Thereby, the range covered with the skin stopper cover member can be minimized, and a good appearance can be obtained. In addition, by fixing the left and right ends of the grained portion with the left and right skin stopper cover members, the skin material terminal portion is fixed without coming off.

  In the above-described configuration, it is preferable that a trim cord is disposed at a terminal portion of the skin material as in claim 2. With this configuration, it is possible to prevent the skin material terminal portion that has been grained into the opening from coming off.

  In the above-described configuration, as in claim 3, the front / rear cover member includes a frame rotatably engaged with the support member, and the frame is fixed by a boss formed on the front / rear cover member. It is preferable that If comprised in this way, a flame | frame will be fixed by the boss | hub part formed in the front-and-back cover member, and the backlash of a flame | frame can be prevented.

  In the above-described configuration, it is preferable that the front and rear cover members have longitudinal ribs formed on the inner upper side. As described above, since the vertical rib is formed on the inner upper portion of the front and rear cover members, the strength against the upward load can be ensured. Moreover, it can be set as a structure with little bending. Furthermore, by changing the vertical rib space, the same size frame can be used to change the size of the headrest to an arbitrary size, and the versatility can be improved.

  According to a vehicle seat pertaining to a fifth aspect of the present invention, the problem is solved by including the headrest according to any one of the first to fourth aspects.

  According to the headrest and the vehicle seat provided with the headrest of the present invention, the insertion portion for inserting the leg portion of the support member into the front and rear cover member and the opening portion for communicating the left and right insertion portions are formed, and the opening portion is formed. The terminal part of the skin material is positioned in the opening, and the skin material located at the periphery of the insertion part is sandwiched by the left and right skin stopper cover members, thereby minimizing the range covered by the skin stopper cover member And a good appearance can be obtained. In addition, by fixing the left and right ends of the grained portion with the left and right skin stopper cover members, the skin material terminal portion is fixed without coming off.

According to the first aspect of the present invention, the range covered by the skin stopper cover member of the headrest can be minimized, and a good appearance can be obtained.
According to the second aspect of the present invention, it is possible to prevent the skin material terminal portion that has been grained into the opening from coming off.
According to the third aspect of the present invention, the play of the frame can be prevented.
In invention of Claim 4, the intensity | strength with respect to an upward load can be ensured and it can be set as a structure with few bending. In addition, by changing the vertical rib space, the same size frame can be used to change the size of the headrest to an arbitrary size, and the versatility can be improved.
In invention of Claim 5, the vehicle seat provided with the headrest which concerns on this invention can be provided.

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.
FIG. 1 shows an embodiment of the present invention, FIG. 1 is a perspective view of a seat provided with a backrest seat and a headrest, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is an exploded perspective view of the headrest frame and the locking means, FIG. 5 is a perspective view of the headrest frame assembled with the pillar and the side contacting the head of the locking means, and FIG. 6 is a front view of FIG. 7 is a rear view of FIG. 5, FIG. 8 is an explanatory view of the locking means, FIG. 9 is a sectional view taken along line BB of FIG. 6, FIG. 10 is a perspective view of a pillar, FIG. 11 is a perspective view of a ratchet lever, FIG. 13 is a side view of the latch plate, FIG. 14 is a perspective view of the headrest, FIG. 15 is a partially exploded perspective view of the cover, FIG. 16 is a perspective view of the front and rear cover members, and FIG. 17 is a front view of the front cover member. 18 is a front view of the rear cover member, and FIG. 19 is a head. It is a schematic sectional view showing the cross section of the strike.

  The vehicle seat S of this embodiment is an example of a rear seat of an automobile seat, and includes a seat seat S1 and a backrest seat S2 as shown in FIG. 1, and a headrest is provided above the backrest seat S2. HR is provided. The seat sheet S1 and the back sheet S2 have a known configuration including a frame, a pad, and a skin material covering them, and the details thereof are omitted. In this embodiment, the rear seat of the automobile seat is taken as an example, but it may be a front seat or an intermediate seat of the vehicle as long as the headrest can be attached.

  The headrest HR of the present embodiment can be mounted on the dorsal seat S2 by a pillar 1 as a support member so as to be freely movable up and down, but a known height adjustment mechanism can be used, and details thereof are omitted. .

As shown in FIG. 1, the headrest HR of the present embodiment is in a head support state that is erected with respect to the dorsal seat S <b> 2, and is tilted from the head support state and retracted (in the example of FIG. 1, The middle left side can be set to the retracted state).
As shown in FIG. 2, the headrest HR of this embodiment includes a pillar 1 as a support member, a headrest frame 2 as a frame, a cover material 7 (front and rear cover members 70 in FIG. 2), and a cover material 7. The pad material 8 disposed on the outer periphery of the material and the skin material 9 covering the pad material 8 are main components.

  As will be described later, the terminal portion 91 of the skin material 9 is grained into an opening formed at the bottom of the front and rear cover member 70. A trim cord 95 is disposed on the terminal portion 91 of the skin material 9 to prevent the terminal portion 91 inserted into the opening from being removed.

As shown in FIGS. 4 and 10, the pillar 1 as a support member of the present embodiment includes two legs 11 and 11 mounted on the upper portion of the dorsal fin sheet S <b> 2, and the two legs 11 and 11. 11 has a horizontal shaft portion 12 connecting between the two. The latch plates 41 and 42 are fixed to the horizontal shaft portion 12 of the pillar 1 by welding or the like at a predetermined interval in a direction perpendicular to the axis of the horizontal shaft portion 12. A portion between the latch plates 41 and 42 of the horizontal shaft portion 12 is rotated by substantially semicircular recesses 21a and 22a formed in a lower portion of a headrest frame 2 (a main frame 21 and a sub frame 22) as a frame to be described later. It is pinched movably.
Note that the latch plates 41 and 42 of the present embodiment constitute the locking means 4 described later.

  The headrest frame 2 as a frame of the present embodiment is rotatably engaged with the horizontal shaft portion 12 of the pillar 1 as described above, and as shown in FIG. 4 and FIG. Are combined so that the subframe 22 enters. A ratchet lever 44 and a ratchet 46 are sandwiched between the headrest frame 2 composed of the main frame 21 and the subframe 22. The main frame 21 and the sub frame 22 are integrally assembled by caulking from both outsides with the rivets 101 and 102 interposed therebetween. In addition, the rivets 101 and 102 have the central portions 101a and 102a having large diameters and crimped portions 101b and 102b formed on both sides. Note that the ratchet lever 44 and the ratchet 46 of the present embodiment constitute a lock means 4 described later.

As shown in FIGS. 4 to 6 and 9, the main frame 21 of the present embodiment is formed of a rectangular plate body. A substantially semicircular recess 21a is formed in the lower portion, and the main frame 21 is continuous with the recess 21a. A caulking portion 21 b is formed, and an overhang portion 21 g is formed on the upper side of the main frame 21. The overhanging portion 21g abuts against an overhanging portion 71a of a resin-made front cover member 71, which will be described later, and ensures strength.
The outer periphery of the main frame 21 is formed with a bent wall portion 21c except for a predetermined range on both sides of the concave portion 21a.

On the inner side of the main frame 21, a boss portion 21 e is formed so as to protrude inward from a portion through which the rivet 101 serving as a rotation shaft of the ratchet 46 is inserted. Further, a substantially arcuate projecting portion 21f that projects toward the rotating surface of the ratchet 46 is formed on the outer peripheral side of the boss portion 21e.
A cutout portion 21d is formed on one side surface of the bent wall portion 21c. Then, the ratchet lever 44 is inserted into the notch 21d. The main frame 21 is formed with three tongue pieces 21h, 21i, and 21j bent inward so as to serve as a guide when the ratchet lever 44 is inserted on the extension of the notch 21d. Has been.

  Of the three tongue pieces 21h, 21i, 21j, two tongue pieces 21h, 21j are bent inward from the upper side to the lower side, and are formed at a distance on the left and right sides. One tongue piece 21i that is bent inwardly from the lower side to the upper side is formed in the substantially central portion. Then, the ratchet lever 44 is inserted using the end portions of the three tongue pieces 21h, 21i, and 21j as guide guides. The ratchet lever 44 of the present embodiment constitutes locking means 4 described later.

  As shown in FIGS. 4 and 7 to 9, the sub-frame 22 according to the present embodiment is formed of a rectangular plate, and in a predetermined position, in this example, above the position where the ratchet lever 44 is disposed. Is formed in a shape that is biased to one side (direction far from the notch 21d). A substantially semicircular recess 22a is formed in the lower portion of the subframe 22, and a crimping portion 22b is formed continuously with the recess 22a. Further, an urging receiving portion 22k is formed on the side opposite to the crimping portion 22b so as to be continuous with the concave portion 22a. Then, an inwardly bent portion 22c is formed on the upper side and the left and right sides except for the substantially semicircular concave portion 22a side.

The sub frame 22 is formed with a boss portion 22e protruding inward at a position aligned with the boss portion 21e of the main frame 21, that is, a portion through which the rivet 101 serving as the rotation shaft of the ratchet 46 is inserted.
In addition, a substantially arcuate protrusion 22 f that protrudes toward the rotation surface of the ratchet 46 is formed inside the subframe 22 so as to align with the approximately arcuate protrusion 21 f formed on the main frame 21. Has been.

  As shown in FIGS. 4 and 7, the headrest frame biasing means 3 biases the headrest frame 2 to one side (that is, the tilt side), and includes a shaft 31, a damper 32, a spring 33, and a locking means. 4 is constituted by shaft insertion holes 41d, 42d formed in the latch plates 41, 42 constituting the plate 4, and the urging receiving portion 22k described above.

  The shaft 31 is a round bar, and the damper 32 is formed of a hollow cylindrical body made of rubber. The spring 33 is arranged so that one end 33a is locked to the latch plate 41 and the other end 33b is in contact with the damper 32, and the other end 33b is a wide pressing portion, and the bias receiving portion described above is used. 22k. Due to the urging, the headrest frame 2 always receives the urging force in the tilting direction.

  In the assembly, the shaft 31 is inserted between the two latch plates 41 and 42. The shaft 31 is inserted into the shaft insertion hole 41d (or 42d) of one latch plate 41 (or 42), and then the damper 32 and The spring 33 is inserted into the shaft 31, and then the shaft 31 is inserted into the shaft insertion hole 42d (or 41d) of the other latch plate 42 (or 41).

In addition, the code | symbol 4 shown in FIG. 8 is a locking means, and is provided between the pillar 1 and the headrest frame 2. FIG.
The lock means 4 of the present embodiment includes latch plates 41 and 42, a ratchet lever 44, a ratchet 46, and a spring 45 as a ratchet lever urging means as main components.

As described above, the latch plates 41 and 42 of the present embodiment are fixed to the horizontal shaft portion 12 of the pillar 1 by welding or the like in a direction perpendicular to the axis of the horizontal shaft portion 12 at a predetermined interval.
As shown in FIG. 10, engaging groove portions 41 a and 42 a are formed on the upper side of the latch plates 41 and 42 along the horizontal shaft portion 12.

The latch plates 41 and 42 are formed with arc-shaped outer peripheral portions 41b and 42b and stopper portions 41c and 42c constituted by the walls beyond the engaging groove portions 41a and 42a.
In the present embodiment, the latch plate 41 and the latch plate 42 are formed so that the shapes of the engaging groove portions 41a and 42a are different. The engagement groove portion 42a of the latch plate 42 provided on the right side in FIG. 10 is formed so that the upper end side becomes narrower, and the engagement groove portion 41a of the latch plate 41 provided on the left side in FIG. It is formed in a shape that does not change in direction. Stopper portions 41e and 42e are formed on the end portions (lower side in FIG. 10) of the latch plates 41 and 42 on the side where the headrest frame 2 tilts.

FIG. 13 is a side view of the latch plate 42. The upper side of the engaging groove 42a of the latch plate 42 is inclined inward leaving an area slightly wider than the thickness of the ratchet 46 (angle α in FIG. 13). As described above, in this embodiment, the engagement groove portion 42a of at least one latch plate (in the case of the present embodiment, the latch plate 42) has a narrow upper end side. Thereby, the contact point between the latch plate 42 and the ratchet 46 in the standing state becomes the upper end portion 42f of the engagement groove portion 42a of the latch plate 42 and the lock engagement point 46c of the ratchet 46 shown in FIG. Here, the lock engagement point 46 c serving as a contact is a side surface position when the ratchet 46 abuts on the groove bottom 42 g of the engagement groove 42 a of the latch plate 42.
In addition, the code | symbol 46d shown in FIG. 12 is the locus | trajectory which moved the ratchet 46 to the position which the ratchet 46 contact | abuts to the groove bottom 42g of the engagement groove part 42a of the latch plate 42 from the non-engagement position removed from the engagement groove part 42a. It is.

That is, as shown in FIG. 8, the portion of the latch plate 42 that contacts the ratchet 46 on the narrower upper end side is closer to the pillar 1 than the other portion located in the engagement groove 42 a of the ratchet 46. The distance Z from the horizontal axis portion 12 is configured to be large. For this reason, the contact is separated from the axis of the horizontal shaft portion 12 of the pillar 1 (the rotation center of the headrest frame 2), and the ratchet 46 moves from the engagement position to the non-engagement position (releases the lock). The release load due to the urging force of the headrest frame urging means 3 (spring 33) from the rear can be lowered, and the release load can be adjusted. In the case of the present embodiment, the engagement groove portion 42a of the latch plate 42 positioned on the side engaged with the operation knob of the ratchet lever 44 is formed to be narrow, so that the force from the ratchet lever 44 can be reliably transmitted. .
The latch plates 41 and 42 are provided with shaft insertion holes 41d and 42d for inserting the shaft 31.

  As shown in FIG. 11, the ratchet lever 44 of this embodiment is formed of an elongated plate body, and the plate body 44a slides in the horizontal direction. Engaging recesses 44b and 44b are formed toward the side, and on the side opposite to the engaging recesses 44b and 44b, a movement locking portion 44c is formed in a direction substantially orthogonal to the plate body 44a. A locking portion 44d of the ratchet lever urging means 45 is formed at 44c.

The engaging recesses 44b and 44b are formed between projecting portions 44f and 44f projecting from the plate body main body 44a to the pillar 1 side, sandwich the circular one end side of the ratchet 46, and rotate the ratchet 46. It is formed to allow.
The ratchet lever 44 is connected to one end of a ratchet lever urging means (spring) 45 so that the ratchet 46 is urged in the direction of the engaging grooves 41 a and 42 a of the latch plates 41 and 42. Reference numeral 44 e denotes an end portion that engages with the operation knob 47.

  At this time, a locking portion 44d on one side of the spring 45 is formed on the movement locking portion 44c of the ratchet lever 44, and is positioned below the locking portion 44d of the spring 45 (FIG. 7). A locking portion 21u on the other side of the spring 45 is formed on the bent wall portion 21c of the main frame 21 (see FIG. 5). Then, as shown by the arrows in FIG. 7, the spring 45 biases the movement locking portion 44 c of the ratchet lever 44 obliquely downward due to the difference in the locking position.

  On the other hand, tongue pieces 21h and 21i are formed on the main frame 21, and when the ratchet lever 44 is urged as shown by an arrow in FIG. 7, the other end side of the ratchet lever 44 supports the tongue piece 21i. Is biased toward the tongue piece 21h side. For this reason, the ratchet lever 44 is closest to or in contact with the garnish 73 on the operation knob 47 side, and abuts on the tongue piece 21h on the other side to restrict vertical movement. By doing so, it becomes possible to prevent abnormal noise and noise caused by the movement of the ratchet lever 44 in a scene where vibration occurs, such as vehicle running.

As shown in FIGS. 4, 8, and 12, the ratchet 46 according to the present embodiment includes a rotation hole 46a serving as a rotation shaft, an engagement portion 46b, and a lock engagement point 46c, and the main frame 21 and the subframe. 22 is supported by the headrest frame 2 with the rivet 101 disposed between the two as a rotational axis.
Then, the engaging portion 46b, which is one end side of the ratchet 46, is engaged with the engaging concave portions 44b, 44b of the ratchet lever 44, and the lock engaging point 46c on the other end side is the engaging groove portion 41a, 42a is engaged, and the standing state of the headrest HR is maintained.

  The engagement portion 46b on one end side of the ratchet 46 engages with the engagement recesses 44b and 44b of the ratchet lever 44, but the surface in contact with the engagement recesses 44b and 44b is formed in a circular shape, preferably a perfect circle shape. . Thereby, the ratchet 46 can be rotated following the movement of the ratchet lever 44 stably. The ratchet 46 is thicker than the ratchet lever 44. For this reason, it is possible to prevent the ratchet 46 from being detached from the ratchet lever 44.

  Further, as shown in FIG. 12, the distance X1 between the center of the rotation hole 46a of the ratchet 46 and the center of the engagement portion 46b that engages with the engagement recess 44b of the ratchet lever 44 is equal to the rotation hole 46a of the ratchet 46. It is formed to be larger than the distance Y1 between the center and the position of the lock engagement point 46c (the locus 46d in the case of FIG. 12) that engages with the engagement groove 42a of the latch plate 42. Thereby, it becomes possible to reduce the release load when releasing the engagement (locking) of the ratchet 46 and the latch plates 41 and 42.

That is, in the present embodiment, in the standing state, the ratchet 46 pivotally supported by the headrest frame 2 is biased in the tilting direction by the spring 33, and friction is generated at a portion of the latch plate 42 in contact with the engagement groove 42a. Has occurred. For this reason, when the ratchet 46 is rotated from the engagement position located in the engagement groove 42a of the latch plate 42 to the non-engagement position disengaged from the engagement groove 42a, a frictional resistance is applied and the rotation is difficult. It has become.
However, in the ratchet 46 of the present embodiment, the distance X1 between the center (fulcrum) of the rotation hole 46a and the center (force point) of the engaging portion 46b to which a load is applied by the ratchet lever 44 is the center (fulcrum) of the rotation hole 46a. And the lock engagement point 46c that engages with the engagement groove 42a of the latch plate 42. The position (action point) of the latch plate 42 is larger than the distance Y1, so that the ratchet 46 can be engaged with a small force. The position can be moved to the non-engagement position. That is, a so-called link ratio can be set, and thereby the release load can be adjusted.

In addition, the ratchet lever 44 is configured to sandwich the circular one end side of the ratchet 46 and to allow the ratchet 46 to rotate, so that the engaging portion 46 b on one end side of the ratchet 46 is connected to the ratchet lever 44. It is possible to prevent a state in which the ratchet 46 is rotated only once by being sandwiched by the engaging recess 44b and always engaged. In other words, the ratchet 46 rotates smoothly following the movement of the ratchet lever 44, prevents malfunction, and can be reliably switched by the lock means 4.
Note that the ratchet 46 of the present embodiment is rotatable within a rotation angle range of 20 degrees to 40 degrees around the rotation hole (rotation shaft) 46a.

  When the ratchet 46 is configured to rotate within a rotation angle range of 20 degrees to 40 degrees around the rotation hole (rotation shaft) 46a, the engagement position between the latch plates 41 and 42 and the ratchet 46 is disengaged. It is possible to adjust the amount of lateral movement of the ratchet lever 44 for the engagement and disengagement due to the rotation of the ratchet 46 and the rotation of the ratchet 46 to an optimum value. As described above, the movement amount related to the operation by the lock unit 4 can be adjusted.

  2, 3, and 14 show the headrest HR, FIGS. 15 to 18 show the resin cover member 7, and FIG. 19 is a schematic cross-sectional view showing a cross section of the headrest. FIG. 15 shows the assembled state of the cover material 7. After the pillar 1 as the support member, the headrest frame 2 as the frame, the headrest frame biasing means 3, the lock means 4, etc. are assembled, the cover material 7 is assembled. It is something to cover with. The cover member 7 includes a front cover member 71 and a rear cover member 72 that constitute the front and rear cover members 70, a garnish 73, and skin cover cover members 74 and 75.

  The front cover member 71 and the rear cover member 72 sandwich the headrest frame 2, the headrest frame biasing means 3, the lock means 4, and the like that are assembled on the horizontal shaft portion 12 of the pillar 1 from the front-rear direction.

  As shown in FIG. 16, insertion portions 70 d and 70 e for inserting the leg portions 11 of the pillar 1 are formed on the bottom surface portion of the front and rear cover member 70. Further, an opening 70 f that connects the left and right insertion portions 70 d and 70 e is formed on the bottom surface of the front and rear cover member 70.

  As shown in FIG. 15, a hole 70 b that allows the end of the ratchet lever 44 to extend is formed at the arrangement position of the ratchet lever 44 of the front and rear cover member 70. As shown in FIG. 17, a protrusion 71 e is formed on the front cover member 71, and the protrusion 71 e is formed in the main frame 21 when the headrest frame 2 is disposed on the front cover member 71. It fits into the hole 21k. Further, the engaging claw 71 f formed on the front cover member 71 engages with the end of the bent wall portion 21 c of the main frame 21, and the headrest frame 2 is attached to the front cover member 71.

  As shown in FIG. 18, the rear cover member 72 is formed with an engagement protrusion 72j. The engagement protrusion 72j is inserted into an insertion hole (not shown) of the front cover member 71, whereby the front cover member 71 is formed. The rear cover member 72 is assembled.

  As shown in FIGS. 2, 17 and 18, the outer periphery of the front cover member 71 and the rear cover member 72 facing each other has a recess formed on one side and a protrusion formed on the other side. The projection is fitted in the recess. In this embodiment, the front cover member 71 is formed with a recess 71 h, the rear cover member 72 is formed with a protrusion 72 h, and the front cover member 71 is recessed with a protrusion 72 h of the rear cover member 72. Configured to match. As a result, when the foamed resin is injected into the space between the skin material 9 and the cover material 7 to integrally form the pad portion 8, the foamed resin can be prevented from entering the cover material 7. The pad portion 8 can be formed so as not to hinder the locking means 4 and the like.

  The front / rear cover member 70 has a protruding portion 71 a that is in contact with the protruding portion 21 g formed on the main frame 21. Further, the front and rear cover member 70 is formed with a protruding portion 71 d at an inner lower portion thereof and is in contact with the main frame 21 of the headrest frame 2.

  Further, the front cover member 71 and the rear cover member 72 are formed with boss portions 71b and 72b. The headrest frame 2 is fixed by the boss portions 71b and 72b arranged on the front and rear surfaces thereof, so that the headrest frame 2 can be prevented from rattling.

  Further, the front cover member 71 and the rear cover member 72 are formed with vertical ribs 71c, 72c on the inner upper part thereof, and it is possible to ensure the strength against the upward load. In addition, by changing the space of the vertical ribs 71c and 72c, the headrest frame of the same size can be used to change the size of the headrest HR to an arbitrary size, which is excellent in versatility. be able to.

  As described above, in this embodiment, the front cover member 71 and the rear cover member 72 are formed with the boss portions 71b and 72b and the vertical ribs 71c and 72c, so that the strength against load input is secured and the headrest HR is attached. It can be made less bent.

  The skin material 9 of the present embodiment covers the front and rear cover members 70, is formed in a bag shape with one end opened, and the front and rear cover members 70 fitted with various members such as the headrest frame 2 are sandwiched between the skin materials 9. It is inserted from the opening.

  And as mentioned above, the terminal part 91 of the skin material 9 located in the opening part 70f of the front-and-back cover member 70 is grained into the opening part 70f. As shown in FIGS. 2 and 3, a trim cord 95 is disposed on the back side of the terminal portion 91. The trim cord 95 of this embodiment is made of resin and is sewn along the terminal portion 91 of the skin material 9. It should be noted that the provision of the trim cord 95 makes it easy to insert the terminal portion 91 into the opening 70 f of the front and rear cover member 70.

  After the end portion 91 of the skin material 9 is grained into the opening 70f of the front / rear cover member 70, the insertion portions 70d, 70e through which the legs 11 of the pillar 1 of the front / rear cover member 70 are inserted include the skin stopper cover member 74, 75 is disposed.

  Thereby, the peripheral part 92 (refer FIG. 19) of the skin material 9 located in the periphery of the insertion parts 70d and 70e is covered with the skin stopper cover members 74 and 75, and the peripheral part 92 of the skin material 9 is connected to the front and rear cover members 70. It is clamped between the left and right skin stopper cover members 74 and 75.

  The skin stop cover members 74 and 75 are constituted by substantially plate-like main body portions 174b and 175b and cylindrical portions 174c and 175c through which the legs 11 of the pillar 1 are inserted. In addition, a plurality of engaging claws 174a and 175a are formed in the skin stopper cover members 74 and 75, and the engaging claws 174a and 175a are engaged with the peripheral edges of the insertion portions 70d and 70e of the front and rear cover member 70. Is fitted into the insertion portions 70d and 70e. As a result, the peripheral edge portion 92 located at the peripheral edge of the insertion portions 70 d and 70 e of the skin material 9 is sandwiched between the bottom surface of the front and rear cover member 70 and the top surfaces of the skin stopper cover members 74 and 75.

  That is, the peripheral edge portion 92 of the skin material 9 is sandwiched between the bottom surface of the front and rear cover member 70 and the upper surface of the body portions 174b and 175b of the skin stopper cover members 74 and 75, so that the cover material 7 has a complicated shape. The skin material 9 can be easily sandwiched between the cover materials without being formed. Thereby, a cover structure can be simplified and it is possible to improve production work efficiency. Moreover, the outer skin cover members 74 and 75 do not protrude outward, and a good appearance can be obtained.

  As shown in FIGS. 15 and 19, the front and rear cover member 70 is formed with a hollow cylindrical flange portion 70 c surrounding the end portion of the ratchet lever 44. A garnish 73 is disposed on the cylindrical flange portion 70c, and the end portion of the skin material 9 is sandwiched between the cylindrical flange portion 70c and the garnish 73 for end processing. An end portion 44e of the ratchet lever 44 extends from the space formed by the cylindrical flange portion 70c and the garnish 73, and the operation knob 47 is attached to the end portion 44e. As described above, the movement locking portion 44 c of the ratchet lever 44 is biased obliquely downward by the spring 45, so that the operation knob 47 is regulated by being closest or in contact with the garnish 73. Will be. Engagement protrusions 71g and 72g are formed at locations where the garnish 73 of the front cover member 71 and the rear cover member 72 is provided, and the engagement protrusions 71g and 72g are engaged with the garnish 73. The garnish 73 is fitted by engaging with the hole 73a.

  Then, the assembly of the cover material 7 and the skin material 9 is placed in the cavity of the mold, and a foamed resin is injected into the space between the cover material 7 and the skin material 9 to cause foaming. The material 8 is foam-molded integrally with the skin material 9 and the cover material 7. Thus, by covering the skin material between the cover materials, the foamed resin is injected between the cover material 7 and the skin material 9, and the pad material 8 is integrally formed with the skin material 9 and the cover material 7. be able to. As a result, attachment of the skin material to the cover material is facilitated, work efficiency is improved, and productivity can be improved. As described above, in this embodiment, the front cover member 71 and the rear cover member 72 are fitted by the recess 71h and the protrusion 72h, so that the foamed resin is prevented from entering the cover member 7. is doing.

  FIG. 14 shows the headrest HR after being integrally formed, and reference numeral 97 denotes a grained portion. As shown in FIGS. 2 and 3, a trim cord 95 is provided at the terminal portion 91 of the skin material 9 to prevent the terminal portion 91 inserted into the opening from being removed.

  Further, the terminal portion 91 of the skin material 9 located in the opening 70f is cut into the opening 70f, and the left and right end sides of the wood holding portion 97 are fixed by the left and right skin stopper cover members 74 and 75, whereby the terminal portion 91 is It is fixed without coming out. Moreover, only the part located in the periphery of the penetration parts 70d and 70e of the skin material 9 will be covered, the range covered with the skin stopper cover members 74 and 75 can be minimized, and a good appearance can be obtained. it can.

Next, the operation of the headrest HR configured as described above will be described.
Since the headrest frame 2 is rotatably attached to the horizontal shaft portion 12 of the pillar 1 and is fixed by the lock means 4, the headrest HR is seated when the headrest HR is in an upright state and receives an impact. The person's head can be protected.

  In other words, the pillar 1 attached to the upper portion of the dorsal seat S2 has a horizontal shaft portion 12, and the horizontal shaft portion 12 of the pillar 1 and the headrest frame 2 are rotatably engaged. The headrest frame 2 is normally urged to tilt by the headrest frame urging means 3, but in the standing state, the lock means 4 provided between the headrest frame 2 and the pillar 1. Thus, the tilt is locked. This standing state is shown in FIGS. For this reason, as shown in FIG. 2, the headrest HR is in an upright state.

When the engagement portion 46 b on one end side of the ratchet 46 is pushed by the sliding of the ratchet lever 44, the lock means 4 rotates around the rotation axis, and the lock engagement point 46 c on the other end side of the ratchet 46. Moves in a direction crossing the engagement grooves 41a and 42a of the latch plates 41 and 42.
In the standing state, the ratchet 46 is positioned in the engaging groove portions 41a and 42a and comes into contact with the latch plates 41 and 42, the pillar 1 and the headrest frame 2 are locked, and the standing state of the headrest HR is maintained. .

  Then, by operating the ratchet lever 44 against the ratchet lever urging means 45, the engaging portion 46b on one end side of the ratchet 46 is pushed, and the ratchet 46 rotates about the rotation axis. 46 is retracted from the engaging groove portions 41 a and 42 a, and the ratchet 46 is disengaged from the engaging groove portions 41 a and 42 a of the latch plates 41 and 42. At this time, since the spring 33 which is the headrest frame urging means 3 normally urges the headrest frame 2 in the tilting direction, the headrest HR is tilted about the horizontal shaft portion 12 and is in the retracted state.

  As described above, in the present invention, when the head is supported with respect to the dorsal seat S2 and when the head is supported and tilted to the retracted state, the lock means 4 includes the ratchet lever 44, The latch plates 41 and 42 and the ratchet 46 are used, one end side is engaged with the engaging recess 44b of the ratchet lever 44, and the other end side intersects with the engaging groove portions 41a and 42a of the latch plates 41 and 42. Since the engagement position and the non-engagement position are switched via the engageable ratchet 46, the lock means 4 itself can be configured compactly without taking a width. In addition, since at least one of the engaging groove portions 41a, 42a of the latch plates 41, 42 is formed with a narrow upper end, the contact between the latch plate 42 and the ratchet 46 is separated from the horizontal shaft portion 12 of the pillar 1. Thus, it is possible to reduce the release load due to the urging force of the headrest frame urging means 3 (spring 33) from the rear when releasing the lock.

  Further, the ratchet lever urging means 45 normally urges the ratchet lever 44 in a direction to engage the ratchet 46 with the engagement grooves 41a and 42a of the latch plates 41 and 42, and the ratchet lever 44 is urged. By operating against the urging means 45, the ratchet 46 is disengaged from the engaging grooves 41a, 42a, and the headrest frame urging means 3 tilts the headrest frame 2 into the retracted state, so that the headrest HR tilts. For this reason, the unlocking operation can be performed by one operation (one action).

  Further, by making one end side of the ratchet 46 that contacts the engagement recess 44b of the ratchet lever 44 circular, the ratchet 46 rotates smoothly in the engagement recess 44b of the ratchet lever 44 with respect to the movement of the ratchet lever 44. Thus, the ratchet 46 can be engaged with and disengaged from the engagement grooves 41a and 42a of the latch plates 41 and 42, and an accurate unlocking operation can be performed.

  When the headrest HR in the retracted state is raised, the ratchet lever 44 is normally urged by the ratchet lever urging means (spring) 45, and the ratchet 46 is engaged with the engagement grooves 41 a of the latch plates 41 and 42. 42a, the ratchet 46 is rotated and the lock engagement point 46c is engaged with the engagement grooves 41a and 42a of the latch plates 41 and 42 when the headrest HR is manually raised. Together, it becomes locked.

  In the above-described embodiment, the pillar 1, the latch plates 41 and 42 of the locking means 4, and the ratchet 46 are each provided in two, but may be one, or may be three or more. Further, it goes without saying that one or a plurality of engaging recesses 44b of the ratchet lever 44 can be formed accordingly.

It is a perspective view of a seat provided with a backrest seat and a headrest. It is the sectional view on the AA line of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a disassembled perspective view of a headrest frame and a locking means. It is the perspective view seen from the side which touches the headrest frame which assembled | attached the pillar, and the head of a locking means. FIG. 6 is a front view of FIG. 5. FIG. 6 is a rear view of FIG. 5. It is explanatory drawing of a locking means. FIG. 7 is a sectional view taken along line BB in FIG. 6. It is a perspective view of a pillar. It is a perspective view of a ratchet lever. It is a top view of a ratchet. It is a side view of a latch plate. It is a perspective view of a headrest. It is a partially exploded perspective view of a cover. It is a perspective view of a front and back cover member. It is a front view of a front cover member. It is a front view of a rear cover member. It is a schematic sectional drawing which shows the cross section of a headrest.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pillar 2 Headrest frame 3 Headrest frame urging means 4 Locking means 7 Cover material 8 Pad material 9 Cover material 11 Leg part 12 Horizontal shaft part 21 Main frame 21a Recessed part 21b Caulking part 21c Bending wall part 21d Notch part 21e Boss part 21f Protruding part 21g Overhanging part 21h, 21i, 21j Tongue piece 21k Through hole 21u Locking part 22 Subframe 22a Recessed part 22b Caulking part 22c Bending part 22e Boss part 22f Protruding part 22k Energizing receiving part 31 Shaft 32 Damper 33 Spring 33a One end 33b Other end 41, 42 Latch plate 41a, 42a Engaging groove 41b, 42b Outer peripheral part 41c, 42c Stopper part 41d, 42d Shaft insertion hole 41e, 42e Stopper part 42f Upper end part 42g Groove bottom 44 Ratchet lever 44a Plate body 44 , 44b engaging recess 44c moving locking part 44d locking part 44e end 44f, 44f projecting portion 45 ratchet lever urging means (spring)
46 Ratchet 46a Rotating hole 46b Engaging portion 46c Lock engaging point 46d Trajectory 47 Operation knob 70 Front / rear cover member 70b Hole 70c Cylindrical flange portion 70d, 70e Insertion portion 70f Opening portion 71 Front cover member 71a Overhanging portion 71b Boss portion 71c Vertical rib 71d Projection 71e Projection 71f Engagement claw 71g Engagement projection 71h Recess 72 Rear cover member 72b Boss 72c Vertical rib 72g, 72j Engagement projection
72h Protruding part 73 Garnish 73a Engagement holes 74, 75 Skin stop cover members 174a, 175a Engaging claws 174b, 175b Body part 174c, 175c Tubular part 91 Terminal part 92 Peripheral part 95 Trim cord 97 Grained part 101, 102 Rivet 101a , 102a Central portion 101b, 102b Caulking portion S Vehicle seat S1 Seat seat S2 Back seat HR Headrest

Claims (5)

In the headrest that can stand upright with respect to the dorsal seat and the headrest that can be tilted from the head support state and placed in the retracted state,
A support member having at least a leg portion mounted on an upper portion of the dorsal fin sheet;
A front and rear cover member that includes an insertion portion that passes through the leg portion of the support member, and sandwiches the support member;
A skin material formed in a bag shape and covering the front and rear cover members;
Left and right skin stop cover members that fit into the insertion portions of the front and rear cover members and sandwich the skin material located at the periphery of the insertion portion;
A pad material integrally formed with the skin material and the front and rear cover members by a foamed resin injected between the skin material and the front and rear cover members;
The front / rear cover member is formed with an opening for communicating the left and right insertion portions, and a terminal portion of the skin material located in the opening is grained into the opening. .   The headrest according to claim 1, wherein a trim cord is disposed at a terminal portion of the skin material.   2. The front / rear cover member includes a frame that is rotatably engaged with the support member, and the frame is fixed by a boss formed on the front / rear cover member. Or the headrest of 2.   The headrest according to any one of claims 1 to 3, wherein the front / rear cover member has a vertical rib formed on an inner upper portion thereof.   The vehicle seat provided with the headrest in any one of the said Claims 1 thru | or 4.

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