JP5052941B2 - Headrest and vehicle seat provided with the headrest - Google Patents

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. And conventionally, the lower part of the pillar of the headrest is attached to the lateral recumbent in the backrest seat so as to be able to rotate back and forth, and the pillar is attached to be movable in the left and right direction. A configuration for storing the data by being tilted is known (see Patent Document 1).
Also, a pillar having a horizontal shaft portion and mounted on the upper portion of the seat back, a headrest body whose lower side is rotatably provided on the horizontal shaft portion of the pillar, and built in the headrest body, the headrest body And a tilting mechanism, which is provided on a horizontal shaft portion of the pillar, with a headrest biasing means for biasing the upper portion of the headrest body to the rear side. A lock plate having a portion, a latch provided on the headrest body and having a second locking portion that can be locked to the first locking portion of the lock plate, and an upright state in which the headrest body is substantially vertical The latch urging means for urging the latch so that the second engagement portion is engaged with the first engagement portion of the lock plate, and the urging force of the latch urge means is resisted. And said lock First technology from the locking part has a second engaging portion of said latch to an actuator for unlocking the rate has been proposed (see Patent Document 2).
Further, in the retractable headrest capable of moving the bracket between the folding position and the upright position, a recess is formed in each of the lock reciprocating member and the lock member, and the lock reciprocating member is moved between a locked position and an unlocked position by a spring. A technique for enabling sliding is proposed (see Patent Document 3).

Japanese Utility Model Publication No.7-11951 JP 2005-349915 A WO2005 / 120894A1

In the known example of Patent Document 1, since there is a pivot point of the headrest on the upper part of the backrest seat below the headrest, the headrest largely pivots backward along with the pillar, and the movement amount is large, and the space occupied during storage is large. There was a problem.
That is, when the headrest is tilted back, the entire headrest protrudes to the back side of the backrest seat. In addition, a moving groove for the pillar has to be formed in the upper part of the dorsal seat, which not only has a complicated structure but also cannot be shared with other dorsal seats.

  The known technique of Patent Document 2 can accommodate all the retractable mechanism of the headrest in the headrest body and is excellent in versatility. However, the first locking portion of the lock plate and the first locking The second locking portion provided on the latch that locks with the portion is used, and the lock plate and the latch are aligned in the tiltable direction of the headrest, so that a certain size is ensured in the front-rear direction. There is a problem that it is necessary and there is a limit to thinning the headrest.

In the known technique of Patent Document 3, a recess is formed in each of the lock reciprocating member and the lock member, and the lock reciprocating member is slidable between a locked position and an unlocked position by a spring. Since the reciprocating member and the lock member are switched between the locked position and the unlocked position, the spring force that urges the bracket in the folding direction is directly applied to the reciprocating member for locking and the locking member. In some cases, it was difficult to smoothly reciprocate the members. In addition, when there are a plurality of locking members, there is only one reciprocating member for locking, and the reciprocating member for locking is large in order to be able to slide between all the locking members in the locked position and the unlocked position. Thus, there is a disadvantage that a large load is applied to the reciprocating member for locking.
Further, none of the known techniques disclose a technique in which backlash between the headrest locking means and the headrest rotation restriction is configured in relation to the locking means.

The present invention provides a headrest and a vehicle seat having a headrest that are excellent in versatility, are thin, can be operated lightly by reducing an operation load when tilting from a head-supported state to a retracted state The purpose is to provide.
Another object of the present invention is to provide a headrest and a vehicle seat including the headrest that can prevent the locking means from rattling and that can reliably regulate the rotation of 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 mounted on the upper portion of the dorsal seat, a frame that is rotatably engaged with the support member, a frame urging means that urges the frame to one side, the frame, and the support member; A locking means provided between the locking member and the locking member, the locking member being disposed on the support member and having an engaging groove formed therein, and a recess formed toward the support member side. An operating rod that can be moved, and a fixed member that is pivotally supported by the frame and that is movable so as to cross the engaging groove portion of the locking member and can be engaged and disengaged. The engaging groove portion of the locking member has an upper end side. That it is narrower, it is solved by.

  According to the headrest of the second aspect, the problem is that the headrest is raised with respect to the dorsal seat and the headrest that can be tilted from the head support state to be in the retracted state. A pillar having a shaft portion and mounted on an upper portion of the back seat, a headrest frame that is rotatably engaged with the horizontal shaft portion of the pillar by combining the main frame and the subframe, and the headrest frame A headrest frame urging means for urging to the side, and a locking means provided between the headrest frame and the pillar, the locking means being disposed on a horizontal shaft portion of the pillar, A latch plate formed with an engaging groove along the portion, an engaging recess formed toward the pillar side, and a ratchet lever that slides in a lateral direction, and the ratchet A ratchet having one end engaged with the engagement recess of the bar, and the other end crossing the engagement groove of the latch plate and pivotally supported by the headrest frame, the ratchet It is possible to switch between an engagement position located in the engagement groove portion of the latch plate and a non-engagement position disengaged from the engagement groove portion, and the engagement groove portion of the latch plate is formed narrow on the upper end side. It is solved by.

As described above, when the head is supported with respect to the dorsal seat and when the head is supported and tilted to the retracted state, in the present invention, as the locking means, the latch plate, the ratchet, Since it is switched to the engagement position and the non-engagement position via a ratchet that can be engaged across the engagement groove portion of the latch plate, the locking means itself is compact without taking up any width. can do.
In addition, the engagement groove of the latch plate is formed with a narrow upper end, so that the contact between the latch plate and the ratchet is separated from the horizontal shaft of the pillar, and the release load when releasing the lock is increased. It is possible to lower.

According to the headrest of the third aspect, the problem is that the headrest is raised with respect to the dorsal seat, and the headrest that can be tilted from the head support state to be in the retracted state. A pillar having a shaft portion and attached to the upper portion of the dorsal fin seat;
A headrest frame that is pivotably engaged with the horizontal shaft portion of the pillar by combining a main frame and a subframe, headrest frame biasing means that biases the headrest frame to one side, the headrest frame, and the pillar Locking means provided between the latch plate, a latch plate disposed on the horizontal shaft portion of the pillar, and an engagement groove portion formed along the horizontal shaft portion, and the pillar side A ratchet lever that slides in the lateral direction, one end engages with the engagement recess of the ratchet lever, and the other end intersects with the engagement groove of the latch plate. A ratchet pivotally supported by the headrest frame so as to be engageable, and the latch plate abuts the ratchet on the upper end side formed to be narrow, Abutting portions than the other portions of said ratchet, the distance from the transverse shaft part of the pillar is larger, it is solved by.

With this configuration, the contact point between the latch plate and the ratchet becomes a ratchet with the upper end side of the engagement groove portion of the latch plate, so the contact point is separated from the horizontal shaft portion of the pillar, and the ratchet is moved from the engagement position. When moving to the non-engagement position (when releasing the lock), the release load can be lowered and the release load can be adjusted.

  According to the headrest according to the fourth aspect of the present invention, there is provided a head support state in which the headrest 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 pillar having a shaft portion and mounted on an upper portion of the back seat, a headrest frame that is rotatably engaged with the horizontal shaft portion of the pillar by combining the main frame and the subframe, and the headrest frame A headrest frame urging means for urging to the side, and a locking means provided between the headrest frame and the pillar, the locking means being disposed on a horizontal shaft portion of the pillar, A latch plate formed with an engaging groove along the portion, an engaging recess formed toward the pillar side, and a ratchet lever that slides in a lateral direction, and the ratchet And a ratchet pivotally supported by the headrest frame so that one end side engages with the engagement recess of the bar and the other end side intersects with the engagement groove portion of the latch plate, and the outer periphery of the latch plate This is solved by forming a stopper portion that contacts the ratchet when the headrest is pivotally housed on the surface.

  With this configuration, the ratchet abuts against the stopper portion when the headrest is stored, and further rotation is prevented. The ratchet and the latch plate can prevent rotation, and the rotation between the main frame and the main frame can be prevented. Since it is not a movement prevention, the thickness of the main frame can be reduced.

  According to the headrest according to the fifth aspect of the present invention, in the headrest that is raised with respect to the dorsal seat and the headrest that can be tilted from the head support state to be in the retracted state, A pillar having a shaft portion and mounted on an upper portion of the back seat, a headrest frame that is rotatably engaged with the horizontal shaft portion of the pillar by combining the main frame and the subframe, and the headrest frame A headrest frame urging means for urging to the side, and a locking means provided between the headrest frame and the pillar, the locking means being disposed on a horizontal shaft portion of the pillar, A latch plate formed with an engaging groove along the portion, an engaging recess formed toward the pillar side, and a ratchet lever that slides in a lateral direction, and the ratchet And a ratchet pivotally supported by the headrest frame so that one end side engages with the engagement recess of the bar and the other end side intersects with the engagement groove of the latch plate, and is below the latch plate. This is solved by the fact that a stopper portion made of a protruding extruded portion is formed on the side surface.

  If comprised in this way, when the headrest is accommodated and tilted, the stopper part and the side part on the lower side of the main frame come into contact with each other to support rotation. As described above, by providing the stopper portion, it is possible to set the tilt angle by setting the formation position of the stopper portion to a predetermined value.

  The said structure WHEREIN: When the said ratchet engages with the said engaging groove part, when the position of the bottom part of the engaging groove part of the said latch plate is located above the edge part of a ratchet, it is suitable. With this configuration, since the ratchet is prevented from rotating at the position of the groove bottom, the distance of the groove bottom of the engagement groove of the latch plate is shorter than the length from the rotation axis to the end of the ratchet, and the ratchet It becomes possible to serve as a rotation stopper.

  In the above-described configuration, it is preferable that at least two latch plates are formed, and the engagement groove portion of at least one latch plate is formed to have a narrow upper end side. In other words, if at least one upper end side of the latch plate is narrowly formed, the contact between the latch plate and the ratchet is separated from the horizontal shaft portion of the pillar, and the lock is released. It is possible to reduce the release load.

  In the above configuration, as in the eighth aspect, the engagement groove portions of the latch plates can be formed to have different widths. In this way, by changing the width of the engagement groove, the ratchet can easily enter the engagement groove of the latch plate by the engagement groove of the wider width of the latch plate and can be easily engaged. The ratchet and latch plate play can be reduced by the narrow engagement groove portion of the latch plate.

  In the above configuration, the outer peripheral surface of the latch plate on which the ratchet slides, and a stopper portion formed on the engagement groove portion of the latch plate that contacts before the ratchet enters the engagement groove portion, the ratchet contacts the stopper portion. It is preferable to configure so as to enter and engage with the engaging groove portion of the latch plate after contact. Thereby, it can guide so that a ratchet may engage from the height direction of the engaging groove part of a latch plate.

  In the above configuration, it is preferable that the latch plate is formed with a shaft insertion hole for inserting the shaft. As a result, the headrest frame urging means can be urged from the outside of the headrest frame, and can be formed in close contact with the frame, and a compact urging means can be configured.

  According to the vehicle seat of the eleventh aspect, the problem is solved by including the headrest according to any one of the first to tenth aspects.

  Advantageous Effects of Invention According to the present invention, a vehicle having a headrest and a headrest that is excellent in versatility, is thin, and can be operated lightly by reducing the operation load when tilting from the head support state to the storage state. Sheet can be provided. In addition, according to the present invention, it is possible to prevent the locking means from rattling and to reliably restrict the rotation of the headrest.

  In the present invention, when the head is supported with respect to the dorsal seat, and when the head is supported and tilted to the retracted state, the present invention uses a latch plate and a ratchet as the locking means. Since it is switched to the engagement position and the non-engagement position via a ratchet that can engage with the engagement groove portion of the latch plate, the lock means itself can be made compact without taking a width.

According to the first and second aspects of the invention, the engagement groove of the latch plate is formed with a narrow upper end, so that the contact point between the latch plate and the ratchet is separated from the horizontal shaft portion of the pillar, and the lock is released. It is possible to reduce the release load at the time.
Further, by changing the width of the engaging groove, the ratchet can easily enter the engaging groove of the latch plate by the engaging groove of the wider width of the latch plate so that it can be easily engaged and latched. The ratchet and latch plate play can be reduced by the narrow engagement groove portion of the plate.

In the invention of claim 3, since the contact between the latch plate and the ratchet is a ratchet with the upper end side of the engagement groove portion of the latch plate, the contact is separated from the horizontal shaft portion of the pillar, and the ratchet is in the engagement position. When moving from the position to the non-engagement position (when releasing the lock), the release load can be lowered and the release load can be adjusted.
In the invention of claim 4, when the headrest is stored, the ratchet comes into contact with the stopper portion and prevents further rotation, so that the ratchet and the latch plate can prevent rotation, and between the main frame and the main frame, Since it is not rotation prevention, the thickness of the main frame can be reduced.
According to the fifth aspect of the present invention, when the headrest is housed and tilted, the stopper portion and the side portion on the lower side of the main frame come into contact with each other to support rotation. As described above, by providing the stopper portion, it is possible to set the tilt angle by setting the formation position of the stopper portion to a predetermined value.
In the invention of claim 6, since the ratchet is prevented from rotating at the position of the groove bottom, the distance of the groove bottom of the engagement groove portion of the latch plate is shorter than the length from the rotation shaft to the end portion of the ratchet, and the ratchet It becomes possible to serve as a rotation stopper.
In the invention of claim 7, when at least one upper end side of the latch plate is formed narrow, the contact between the latch plate and the ratchet is separated from the horizontal shaft portion of the pillar, as described above. It is possible to reduce the release load when releasing the lock.
In the invention of claim 8, by changing the width of the engaging groove, the ratchet can easily enter the engaging groove of the latch plate by the engaging groove of the wider width of the latch plate and can be easily engaged. In addition, the backlash between the ratchet and the latch plate can be reduced by the engagement groove portion having a narrow width of the latch plate.
In the ninth aspect of the invention, the ratchet can be guided so as to be engaged from the height direction of the engaging groove portion of the latch plate.
In the invention of claim 10, the headrest frame urging means can be urged from the outside of the headrest frame, and can be formed in close contact with the frame, and a compact urging means can be configured.
In invention of Claim 11, the vehicle seat provided with the headrest which concerns on this invention can be provided.

Hereinafter, embodiments of the present invention will be described 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 of FIG. 1, and FIG. 4 is an exploded perspective view of the means, FIG. 4 is a perspective view of the headrest frame assembled with the pillar and the perspective view seen from the side contacting the head of the locking means, FIG. 5 is a front view of FIG. 4, FIG. 6 is a rear view of FIG. FIG. 8 is a sectional view taken along the line BB of FIG. 5, FIG. 9 is a perspective view of the pillar, FIG. 10 is an explanatory view of the side of the latch plate, FIG. 11 is a side view of the latch plate, and FIG. FIG. 13 is an explanatory view of the action of the latch plate of FIG. 12, FIG. 14 is a perspective view of the ratchet lever, FIG. 15 is a plan view of the ratchet, and FIG. 16 is a partially exploded perspective view of the cover. It is.

  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 the present 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).
The headrest HR of the present embodiment includes a pillar 1 as a support member, a headrest frame 2 as a frame, a headrest frame biasing means 3 as a frame biasing means, and a lock means 4 as main components. .

As shown in FIGS. 3 and 9, 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 seat S <b> 2, and the two legs 11 and 11. 11 has a horizontal shaft portion 12 connecting between the two. Then, latch plates 41 and 42 as locking members are fixed to the horizontal shaft portion 12 of the pillar 1 by welding or the like at predetermined intervals 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 a substantially semicircular lower assembly recess 21a formed at a lower portion of a headrest frame 2 (main frame 21 and subframe 22) as a frame to be described later. 22a is rotatably held.
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. 3 and FIG. A plurality of hemming caulking portions 21r and 21r and a punching restricting portion 22g having a hole 22h and hemming caulking portions 21b and 22b described later are combined so that the subframe 22 enters.
A ratchet lever 44 as an operating rod and a ratchet 46 as a fixing member are sandwiched between the headrest frame 2 including the main frame 21 and the sub frame 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. 3 to 5, the main frame 21 of the present embodiment is formed of a rectangular plate, and is formed with a substantially semicircular lower assembly recess 21a at the lower portion, and this lower assembly recess 21a. A hemming caulking portion 21b is formed continuously. The lower assembling recess 21a is formed with a notch 21m in which an intermediate part is cut out, and a rattle prevention piece 21k is formed toward the notch 21m. The rattle prevention piece 21k has slits 21s on both sides. Is formed. The backlash prevention piece 21k abuts against the horizontal shaft portion 12 of the pillar 1 with a spring effect by the slit 21s. This more reliably prevents the headrest frame 2 and the pillar 1 from rattling.
Further, an overhang portion 21 g is formed on the upper side of the main frame 21. The protruding portion 21g abuts a protruding portion of a resin-made front cover member 7a, which will be described later, and ensures strength.
Further, 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 lower assembling 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. The substantially arcuate protrusion 21f guides the ratchet 46 so as to be movable without rattling with a substantially arcuate protrusion 22f formed in a subframe described later.

  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. In addition, three tongue pieces 21h, 21i, and 21j bent inward are formed on the extension of the notch portion 21d so as to serve as a guide when the ratchet lever 44 is inserted.

  Of the three tongue pieces 21h, 21i, 21j, two tongue pieces 21h, 21j are bent inwardly 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 bottom to the top 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.

  Further, with the ratchet lever 44 inserted, embossed portions 21p and 21p directed toward the ratchet lever 44 are formed at the position of the ratchet lever 44 of the main frame 21. The embossed portion 21p guides with the embossed portion 22p of the subframe 22 to be described later so that the ratchet lever 44 can be sandwiched and moved without rattling.

  As shown in FIGS. 3, 6 and 7, the sub-frame 22 of the present embodiment is formed of a rectangular plate, and in a predetermined position, in the present embodiment, from the position where the ratchet lever 44 is disposed. The upper part is configured in a shape that is biased to one side (a direction far from the notch 21d).

  In addition, as shown in FIGS. 6 and 7, the sub-frame 22 is formed with a bent wall portion 22c on the upper side and the left and right sides except the lower side, but the inner side of the bent wall portion 22c bulges from the general surface. The bulging portion 22d is formed, and the bulging portion 22d and an urging receiving portion 22k described later lower the general surface (the upper surface in FIG. 6). Accordingly, the rivets 101 and 102 and the hemming caulking portions 21r and 21r are positioned lower than the bulging portion 22d and the urging receiving portion 22k, and are configured to prevent interference with other members.

As shown in FIG. 7, a punching restricting portion 22g having a hole 22h for hemming caulking protruding toward the opposing main frame 21 is formed at a position away from the center line of the subframe 22 by a predetermined distance.
A substantially semicircular lower assembly recess 22a is formed at the lower portion of the subframe 22, and a hemming caulking portion 22b is formed continuously to the lower assembly recess 22a.

  As described above, the main frame 21 and the subframe 22 are the same from the main frame 21 side to the subframe 22 side by the punching restricting portion 22g having the hemming caulking portions 21r and 21r and the hole 22h and the hemming caulking portions 21b and 22b. Since the caulking is performed in the direction, the machining is easier than in the case of burring, and the main frame 21 is formed on the side of the main frame 21 so as not to be exposed and is in contact with the head. The side headrest frame side is configured to have as few protrusions as possible.

Further, an urging receiving portion 22k is formed by drawing on the side opposite to the hemming caulking portion 22b so as to be continuous with the lower assembly recessed portion 22a. As shown in FIG. 6, the urging receiving portion 22k comes into contact with the end 33b of the spring 33 and is formed so as to rise to the spring arrangement side. Further, the urging receiving portion 22k abuts against a spring 33 constituting the headrest frame urging means 3, and abuts against a later-described damper 32 during rotation to prevent rattling and noise.
Then, except for the substantially semicircular lower assembly recess 22a side, that is, on the upper side and the left and right sides, bent portions 22c (see FIG. 7) to the inside are formed.

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. Embossed portions 22p and 22p facing the ratchet lever 44 are formed at the position of the ratchet lever 44 of the subframe 22.
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. 3 and 6, the headrest frame urging means 3 as a frame urging means urges the headrest frame 2 to one side (that is, the tilt side), and includes a shaft 31, a damper 32, The spring 33, the shaft insertion holes 41d and 42d formed in the latch plates 41 and 42 constituting the locking means 4, and the bias receiving portion 22k described above are configured.

  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. 7 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 as locking members, a ratchet lever 44 as an operating rod, a ratchet 46 as a fixing member, and a ratchet lever biasing means (operating rod biasing means). And the spring 45 as a main component.

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. 9, 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 have arcuate outer peripheral portions (outer peripheral surfaces) 41b and 42b, engaging groove portions 41a and 42a, and portions beyond the engaging groove portions 41a and 42a before the ratchet enters the engaging groove portion. Stopper portions 41c and 42c formed from the abutting walls are formed. The stopper portions 41c and 42c are formed higher than the arcuate outer peripheral portions (outer peripheral surfaces) 41b and 42b by the distances A and B in FIGS.
In a normal case, the ratchet 46 enters the engagement groove portions 41a and 42a of the latch plates 41 and 42 after being brought into contact with the stopper portions 41c and 42c, thereby engaging the ratchet 46 with the latch plates 41 and 42. It can guide so that it may engage from the height direction of engagement groove part 41a, 42a. When the ratchet 46 slowly moves on the arcuate outer peripheral portions (outer peripheral surfaces) 41b and 42b, the ratchet 46 may enter the engaging groove portions 41a and 42a without contacting the stopper portions 41c and 42c.

  In the present embodiment, as shown in FIG. 10, the engagement groove portions 41a and 42a have the width (L) of the engagement groove portion 41a larger than the width (R) of the engagement groove portion 42a. Thus, by changing the width of the engagement groove portions 41a and 42a, the ratchet 46 can easily enter the engagement groove portion of the latch plate 41 by the engagement groove portion 41a having the wider width of the latch plate, It is possible to easily reduce the backlash between the ratchet 46 and the latch plate by the engagement groove portion 42a having a narrow width of the latch plate 42.

  Further, the latch plate 41 and the latch plate 42 are formed so that not only the width of the engagement groove portion but also the shapes of the engagement groove portions 41a and 42a are different as described above. The engaging groove portion 42a of the latch plate 42 provided on the right side in FIG. 9 is formed so that the upper end side becomes narrower, and the engaging 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.

  Further, as shown in FIG. 9, stopper portions 41 e and 42 e made of extruded portions projecting to the opposite sides are formed on the opposing surfaces of the lower sides of the latch plates 41 and 42 (when the pillars are mounted). ing. When the headrest is housed and tilted, the stopper portions 41e and 42e and the lower side portions 21t and 21t of the main frame 21 are in contact with each other to support rotation. As described above, by providing the stopper portions 41e and 42e, it is possible to set the tilt angle by setting the formation positions of the stopper portions 41e and 42e to a predetermined value. In addition to the latch plates 41 and 42 and the ratchet 46, the stopper portions 41e and 42e of the latch plates 41 and 42 and the side portions 21t and 21t on the lower side of the main frame 21 can be abutted and supported. Even when the latch plates 41 and 42 and the ratchet 46 are released, it is possible to ensure the holding strength during storage. In the example of FIG. 9, the stopper portions 41e and 42e are opposed to each other, but only one of them may be provided. Moreover, although the stopper parts 41e and 42e are made into the extrusion part projected inside, it is formed so that it may project outside, and it changes so that the lower part side of the main frame 21 may change suitably, and it may contact with the stopper part projected outside Also good.

  FIG. 11 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. 11). 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.

That is, the groove bottom 42 g is formed so as to be located above the end of the ratchet 46. Since the ratchet 46 is prevented from rotating at the position of the groove bottom (bottom portion) 42g, when the ratchet 46 engages with the engagement groove portions 41a, 42a, the engagement groove portions 41a, 42a of the latch plates 41, 42 are provided. The position of the groove bottom (bottom part) 42g and the end of the ratchet 46 are in contact with each other, and serve as a rotation stopper for the ratchet 46.
Note that reference numeral 46d shown in FIG. 15 indicates a locus in which the ratchet 46 is moved from a non-engagement position where it is disengaged from the engagement groove 42a to a position where the ratchet 46 contacts the groove bottom 42g of the engagement groove 42a of the latch plate 42. It is.

  That is, as shown in FIG. 7, the portion of the latch plate 42 that is in contact with 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, 42 are provided with shaft insertion holes 41d, 42d for inserting the shaft 31 constituting the headrest frame urging means 3. As a result, the headrest frame urging means 3 can be urged from the outside of the headrest frame, and can be formed in close contact with the frame, and a compact urging means can be configured.

  Further, as shown in FIG. 12, stopper portions 41p, 42p (only 42p is illustrated in FIG. 12) formed of stepped portions may be formed on the outer peripheral portions 41b, 42b of the latch plates 41, 42. In this case, as shown by the arrow in FIG. 13, the ratchet 46 comes into contact with the stopper portions 41p and 42p when the headrest is stored, and further rotation is prevented, and the ratchet 46 and the latch plates 41 and 42 are prevented. The rotation of the main frame 21 can be prevented and the rotation of the main frame 21 can be prevented.

  As shown in FIG. 14, the ratchet lever 44 of the present embodiment is formed from 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.
One end of a ratchet lever urging means (spring 45) is coupled to the ratchet lever 44 so that the ratchet 46 is urged in the direction of the engaging grooves 41a and 42a of the latch plates 41 and 42. Reference numeral 44e denotes an end side that engages with the operation knob.

As shown in FIGS. 3, 7, and 15, 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.
Further, on each inner side (opposite side) of the main frame 21 and the sub-frame 22, a substantially arcuate protrusion 21 f and a substantially arcuate protrusion 22 f are formed so as to protrude toward the rotation surface of the ratchet 46. The rotation of the ratchet 46 is guided.
Then, the engaging portion 46b which is one end side of the ratchet 46 is engaged with the engaging concave portions 44b and 44b of the ratchet lever 44, and the lock engaging point 46c on the other end side is the engaging groove portion 41a of the latch plates 41 and 42. 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. 15, the distance X1 between the center of the rotation hole 46a of the ratchet 46 and the center of the engagement portion 46b on one end side of the ratchet 46 that engages with the engagement recess 44b of the ratchet lever 44 is The distance Y1 between the center of the rotation hole 46a of 46 and the position of the lock engagement point 46c (the locus 46d in the case of FIG. 15) on the other end side of the ratchet 46 that intersects and engages the engagement groove 42a of the latch plate 42 It is formed to be larger than. 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 this embodiment, the distance X1 between the center (fulcrum) of the rotation hole 46a and the center (power 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 the engagement groove 42a of the latch plate 42 so that it is larger than the distance Y1 (the action point). 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 it is configured to rotate within a range of rotation angle of 20 degrees to 40 degrees around the rotation hole (rotation shaft) 46a of the ratchet 46, 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 to the ratchet 46 and to the optimum one. As described above, the movement amount related to the operation by the lock unit 4 can be adjusted.

FIG. 16 shows the assembled state of the cover material 7, the pillar 1 as a support member, the headrest frame 2 as a frame, the headrest frame urging means 3 as a frame urging means, the locking means 4, etc. After assembling, the cover material 7 is covered. The cover member 7 includes a front cover member 7a and a rear cover member 7b made of resin, a skin stopper cover member 7c, and a garnish 7d that prevents the operation knob of the operation unit from coming off.
As shown in FIG. 2, the pad material 8 is disposed on the outer periphery of the cover material 7, and the skin material 9 covers the pad material 8.

  The skin material 9 of the present embodiment is formed in a bag shape having an open end, and is provided with various members surrounded by the cover material 7 from the opening of the skin material 9. The side skin terminal portion covered by the pillar 1 side skin stopper cover member 7c is mounted in a cavity of a mold, and foamed by injecting a foamed resin and integrally molded.

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 and 42a of the latch plates 41 and 42 as the locking member is formed narrow at the upper end side, the contact point between the latch plate 42 and the ratchet 46 is the horizontal axis portion of the pillar 1. Therefore, the release load due to the urging force of the headrest frame urging means 3 (spring 33) from the rear when releasing the lock can be reduced.

  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 41a 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 embodiment, there are two pillars 1, latch plates 41 and 42 as locking members of the locking means 4, and ratchet 46 as a fixing member, but there may be one or three or more. Good. Further, it goes without saying that one or a plurality of engaging recesses 44b of the ratchet lever 44 as an operating rod 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. 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. 5 is a front view of FIG. 4. FIG. 5 is a rear view of FIG. 4. It is explanatory drawing of a locking means. FIG. 6 is a sectional view taken along line BB in FIG. 5. It is a perspective view of a pillar. It is explanatory drawing of a latch plate side surface. It is a side view of a latch plate. It is a side view which shows the other example of a latch plate. It is explanatory drawing of an effect | action of the latch plate of FIG. It is a perspective view of a ratchet lever. It is a top view of a ratchet. It is a partially exploded perspective view of a cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pillar 2 Headrest frame 3 Headrest frame biasing means 4 Locking means 7 Cover material 7a Front cover member 7b Rear cover member 7c Skin stop cover member 7d Garnish 8 Pad material 9 Skin material 11 Leg 12 Horizontal shaft 21 Main frame 21a Lower part Assembly recess 21b Hemming caulking part 21c Bending wall part 21d Notch part 21e Boss part 21f Protruding part 21g Overhang part 21h, 21i, 21j Tongue piece 21k Ragged piece 21m Notch part 21p Embossed part 21r Hemming caulking part 21s Slit 21t Side portion 22 Subframe 22a Lower assembly recessed portion 22b Hemming caulking portion 22c Bending portion 22d Swelling portion 22e Boss portion 22f Protruding portion 22g Punching restricting portion 22h Hole 22k Energizing receiving portion 22p Embossing portion 31 Shaft 32 Damper 3 Spring 33a One end 33b The 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 Main bodies 44b, 44b Engaging recess 44c Movement locking portion 44d Locking portion 44e End portions 44f, 44f Overhanging portion 45 Ratchet lever biasing means (spring)
46 Ratchet 46a Rotating hole 46b Engaging portion 46c Lock engaging point 46d Trajectory 101, 102 Rivet 101a, 102a Center portion 101b, 102b Caulking portion S Vehicle seat S1 Seat seat S2 Backrest seat HR Headrest

Claims (11)

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 mounted on the upper portion of the dorsal fin sheet,
A frame that is pivotally engaged with the support member;
Frame urging means for urging the frame to one side;
Locking means provided between the frame and the support member,
The locking means is
A locking member disposed on the support member and formed with an engaging groove;
An operating rod having a recess formed toward the support member and movable;
A fixed member that is pivotally supported by the frame and that is movable and movable with the operating rod and intersects with the engaging groove of the locking member.
The headrest, wherein the engaging groove of the locking member is formed with a narrow upper end. 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 pillar having a horizontal axis portion and mounted on the upper part of the dorsal fin seat;
A headrest frame that is pivotally engaged with the horizontal shaft portion of the pillar by combining a main frame and a subframe;
Headrest frame biasing means for biasing the headrest frame to one side;
A locking means provided between the headrest frame and the pillar,
The locking means is
A latch plate disposed on the horizontal shaft portion of the pillar and having an engagement groove formed along the horizontal shaft portion;
A ratchet lever having an engagement recess formed toward the pillar side and sliding in the lateral direction;
A ratchet that has one end engaged with the engagement recess of the ratchet lever and the other end intersects with the engagement groove of the latch plate and is pivotally supported by the headrest frame;
The ratchet can be switched between an engagement position located in the engagement groove portion of the latch plate and a non-engagement position removed from the engagement groove portion,
The engagement groove portion of the latch plate is formed with a narrow upper end side. 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 pillar having a horizontal axis portion and mounted on the upper part of the dorsal fin seat;
A headrest frame that is pivotally engaged with the horizontal shaft portion of the pillar by combining a main frame and a subframe;
Headrest frame biasing means for biasing the headrest frame to one side;
A locking means provided between the headrest frame and the pillar,
The locking means is
A latch plate disposed on the horizontal shaft portion of the pillar and having an engagement groove formed along the horizontal shaft portion;
A ratchet lever having an engagement recess formed toward the pillar side and sliding in the lateral direction;
A ratchet that has one end engaged with the engagement recess of the ratchet lever and the other end intersects with the engagement groove of the latch plate and is pivotally supported by the headrest frame;
The latch plate is in contact with the ratchet at the narrow upper end side, and the corresponding contact portion is formed to have a larger distance from the horizontal shaft portion of the pillar than the other portion of the ratchet. Headrest characterized by. 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 pillar having a horizontal axis portion and mounted on the upper part of the dorsal fin seat;
A headrest frame that is pivotally engaged with the horizontal shaft portion of the pillar by combining a main frame and a subframe;
Headrest frame biasing means for biasing the headrest frame to one side;
A locking means provided between the headrest frame and the pillar,
The locking means is
A latch plate disposed on the horizontal shaft portion of the pillar and having an engagement groove formed along the horizontal shaft portion;
A ratchet lever having an engagement recess formed toward the pillar side and sliding in the lateral direction;
A ratchet that has one end engaged with the engagement recess of the ratchet lever and the other end intersects with the engagement groove of the latch plate and is pivotally supported by the headrest frame;
The headrest is characterized in that a stopper portion that contacts the ratchet is formed on the outer peripheral surface of the latch plate when the headrest is rotated and stored. 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 pillar having a horizontal axis portion and mounted on the upper part of the dorsal fin seat;
A headrest frame that is pivotally engaged with the horizontal shaft portion of the pillar by combining a main frame and a subframe;
Headrest frame biasing means for biasing the headrest frame to one side;
A locking means provided between the headrest frame and the pillar,
The locking means is
A latch plate disposed on the horizontal shaft portion of the pillar and having an engagement groove formed along the horizontal shaft portion;
A ratchet lever having an engagement recess formed toward the pillar side and sliding in the lateral direction;
A ratchet that has one end engaged with the engagement recess of the ratchet lever and the other end intersects with the engagement groove of the latch plate and is pivotally supported by the headrest frame;
A headrest characterized in that a stopper portion made of a protruding extruded portion is formed on the lower surface of the latch plate.   The position of the bottom part of the engaging groove part of the said latch plate is located upward from the edge part of a ratchet, when the said ratchet engages with the said engaging groove part. The listed headrest.   The headrest according to any one of claims 2 to 5, wherein at least two latch plates are formed, and an engagement groove portion of at least one latch plate is formed with a narrow upper end side.   The headrest according to any one of claims 2 to 5, wherein the engaging groove portions of the respective latch plates are formed to have different widths.   An outer peripheral surface of the latch plate on which the ratchet slides, and a stopper portion formed on an engagement groove portion of the latch plate that can contact before the ratchet enters the engagement groove portion, and the ratchet is the stopper 6. The headrest according to claim 2, wherein the headrest enters and engages with an engagement groove portion of the latch plate after contacting the portion.   6. The headrest according to claim 2, wherein a shaft insertion hole for inserting a shaft is formed in the latch plate.   The vehicle seat provided with the headrest in any one of the said Claims 1 thru | or 10.

Images