JPH0548750U - Vehicle headrest device - Google Patents

Abstract

(57) [Abstract] [Purpose] The front and rear adjustment mechanism and the retractable mechanism can be installed inside the headrest in series and set to the angle adjustment position, overstroke position and retracted position without the need for a separate operating lever. And In a headrest mounted between the corners of a seat back so as to be rotatable about the rotation axis via a rotation axis, a headrest bracket having a bracket plate is rotated around the rotation axis at a predetermined interval integrally with the headrest. The adjustment base bracket that is movably provided and faces the one of the bracket plates is attached to the rotary shaft, and an angle adjustment mechanism and a storage mechanism are provided in series between the bracket plate and the adjustment base bracket to provide the headrest. It is possible to set the storage position, a plurality of stages of angle adjustment positions, and the overstroke position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a headrest device attached to a seat back of a vehicle seat.

[0002]

[Prior Art]

 Conventionally, as a headrest 4 which is removably attached to a rear seatback 1 of this type, as shown in FIG. 9, the corner portions 2 are provided at predetermined intervals so that the headrest 4 can be stored in the upper portion of the seatback 1. There is a stay structure in which the storage recesses 3 are formed at intervals, and the storage recesses 3 are provided so as to be vertically adjustable via the stays 5 suspended from the headrest 4 and stored in the storage recesses 3. Further, as shown in FIG. 10, the headrest 4 is mounted between the corners 2 via the rotary shaft 6, and the front and rear angle adjusting mechanisms installed inside one end of the rotary shaft 6, that is, the one corner 2. There is a rotation configuration that tilts backward through 7 and stores it between the corners 2.

[0003]

[Problems to be solved by the device]

 However, since the storage structure using the stays 5 is stored in the storage recess 3 by adjusting the movement in the vertical direction, the height of the corner portion 2 becomes high, which causes a problem that the rear visibility of the driver is deteriorated. Further, in the case of the structure having the rotary shaft 6, the angle adjusting mechanism 7 is internally provided in the corner portion 2, so that the work of assembling the headrest 4 becomes difficult, and the operation lever 8 of the angle adjusting mechanism 7 is There was a problem that it became necessary and the number of parts increased.

The present invention has been made to solve the above-mentioned conventional problems, and an angle adjustment is performed by installing a front and rear adjustment mechanism and a storage mechanism in series inside a headrest without requiring a separate operation lever. It is an object of the present invention to provide a vehicle headrest device that can be set to a position, an overstroke position, and a storage position.

[0005]

[Means for Solving the Problems]

 In order to solve the above technical problems, the present invention provides a headrest rotatably mounted around the rotational axis between the corners of a seat back via the rotational axis, and a bracket plate is attached to the rotational axis at predetermined intervals. A headrest bracket is provided so as to be rotatable integrally with the headrest, and an adjusting base bracket that opposes the one bracket plate is attached to the rotating shaft, and an angle adjusting mechanism is provided between the bracket plate and the adjusting base bracket. And a storage mechanism arranged in series so that the headrest can be set at a storage position, a plurality of stages of angle adjustment positions, and an overstroke position.

[0006]

[Action]

 With the above configuration, the pole of the angle adjusting mechanism is retracted and held in the setting process from the angle adjusting position to the overstroke position, and the pole is returned in the setting process to the storing position.

[0007]

【Example】

 An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 shows a headrest assembly 11 as a whole, which is a headrest 12 and a headrest device 15 which forms the headrest 12 and is installed in the headrest 12. It is composed of an insert 13 for covering the.

The headrest device 15 includes a rotating shaft 16, a headrest bracket 18 that is rotatably attached to the rotating shaft 16, and an adjusting base that is attached to a predetermined position of the rotating shaft 16 and faces the headrest bracket 18. The bracket 31 is composed of an angle adjusting mechanism 40 and a storage mechanism 55 which are interposed between the adjusting base bracket 31 and the headrest bracket 18.

The rotating shaft 16 is made of a pipe material having a predetermined diameter, and is formed to have a length that can be mounted between the corners 2 of the rear seatback 1. The rotating shaft 16 is located near one end of the rotating shaft 16. A washer 17 for restricting the movement of the headrest bracket 18 in the axial direction is fixed to the position of 7 by welding means or the like.

The headrest bracket 18 is integrally formed by, for example, press molding. The left and right bracket plates 19 and 20 are opposed to each other by a connecting plate 21 at a predetermined interval, and the left and right bracket plates 19 and 20 are substantially formed. Since it is formed in the same shape, the bracket plate 20 on the right side in the figure will be described. Its side surface shape is as shown in FIGS. 3 and 4 (note that the left side in FIG. 4 is the front side and the right side is the rear side). It is formed in a substantially fan shape, and an edge portion 21 is formed on the four circumferences thereof, and a substantially circular convex portion 23 having a predetermined diameter and a predetermined protruding width is bulged on the base side thereof. The upper portion of the circular convex portion 23, that is, the vertical portion of the circular convex portion 23, which is substantially parallel to one of the fan-shaped edges 21a 1 and 21b of the circular convex portion 23, passes through the center point P of the circular convex portion 23. A horizontal cam flange surface 25 is formed so as to be orthogonal to the straight line H, and an insertion hole 26 having an edge portion through which the rotary shaft 16 is inserted is formed at the center point P. A mounting projection 27, which projects from the center surface 22 along the predetermined radius R from the center point P and is lower than the circular projection 23, is formed on the rotation edge side of the plate 20. Further, at a predetermined position near the right end in the figure on the mounting convex portion 27 side of the central surface 22 is formed an operating claw 28, a part of which is cut out and raised outward by a predetermined length in a substantially rectangular shape. ing. The bracket plate 19 is formed in a shape without the circular convex portion 23 of the bracket plate 20.

As shown in FIGS. 3 and 4, the adjustment base bracket 31 is fixed to a predetermined position of the rotary shaft 16 by welding means or the like and is installed opposite to the bracket plate 20 of the headrest bracket 18. The base plate 31a has a substantially deformed quadrangular shape, and a bulging substantially circular protrusion 32 having a predetermined diameter is formed at the base of the base plate 31a so as to face the circular protrusion 23 of the bracket plate 20. A hole 33 having an edge portion for inserting and fixing the shaft 16 is formed. Further, as shown in the drawing of the base plate 32, a rising edge 34 is formed in an inverted U-shape shown in the figure on the rear side of the vertical line H in a continuous manner from the peripheral edge of the circular convex portion 32, and on the bracket plate 20 side thereof. The lid plate 35 is integrally formed,

The outer side surface 35 a of the cover plate 35 is provided lower than the outer side surface 32 a of the circular convex portion 32. Further, a pin hole 36 for mounting the pole 45 of the angle adjusting mechanism 40 is provided at the center of the arcuate edge above the rising edge 34. A part of the lid plate 35 is cut and raised in a substantially rectangular shape at a predetermined position to form a stopper claw 38 that projects toward the headrest bracket 18 side. When the circular convex portion 32 of the adjusting base bracket 31 thus formed is brought into contact with the circular convex portion 23 of the headrest bracket 18 by aligning the holes 26 and 33 with each other, the mounting convex portion 27 and the cover plate 35 are separated from each other. A predetermined space T is formed in the space, and an angle adjusting mechanism 40 and a storage mechanism 55 are interposed in series between both members.

The angle adjusting mechanism 40 includes a ratchet 41 and a pole 45. The ratchet 41 is mounted on the mounting projection 27 of the bracket plate 20. The ratchet 41 has a plurality of locking claws 42 (five pieces) at predetermined intervals. Is formed, and locking grooves 43a, 43b, 43c, 43d are formed between the locking claws 42, and the ratchet 4 1 has the first locking claw 42 (the left end in the figure). The locking surface 42a of the locking claw) is attached along the vertical line H, and each locking claw 42 faces the central surface 22.

Further, the pole 45 is rotatably attached to the pin hole 36 of the adjustment base bracket 31 by a pin 51 in a swaged manner, and the attachment base portion 46 of the pole 45 has a hole aligned with the pin hole 36. Engaging claws 47 are formed on the upper side of the base portion 46 in the drawing in the figure so as to be able to engage with the locking grooves 43a of the ratchet 41, and a releasing claw 48 is formed on the rear side of the engaging claws 47. The relief claw 48 is provided so as to face the rotation locus of the operation claw 28 attached to the bracket plate 20 when the headrest bracket 18 is rotated to the front side. Further, a lever 49 is formed on the mounting base portion 46 so as to extend toward the front side in the figure at a predetermined angle with respect to the engaging claw 47 and at a predetermined position near the tip of the lever 49, which will be described later. A hole seat 50 on which the torsion spring 56 is fitted is formed.

Next, the storage mechanism 55 is composed of the pole 45, the operating claw 28 formed on the bracket plate 20, the cam flange surface 25 formed on the circular convex portion 23 of the plate 20, and the torsion spring 56. The torsion spring 56 has a predetermined spring pressure, one arm 57 of which is hooked to the hole seat 50 of the pole 45, and the other arm 58 is provided at a predetermined position of the base plate 31a. Usually, the hole seat 50 of the pole 45 is located above the line h connecting the pin 51 and the spring hole 59, and is urged in the clockwise direction about the pin 51. There is.

The headrest bracket 18 formed as described above is inserted into the rotary shaft 16 together with the headrest torsion spring 61, the bracket plate 19 is brought into contact with the washer 17, and is welded to a predetermined position of the coaxial shaft 16 by welding means. A fixed bracket 62 is attached, and one arm 61a of the spring 61 is hooked on the fixed bracket 62, and the other arm 62b is hooked on a hole 63 penetrating at a predetermined position of the bracket plate 19 and counterclockwise. Direction (front side), the adjusting base bracket 31 is inserted through the rotating shaft 16, and the engaging claw 47 of the pole 45 engages with the locking claw 42 of the left end portion of the ratchet 41 as shown in FIG. The adjustment base bracket 31 is fixed to the rotating shaft 16 in a stopped state. The seat back lock plates 64 are attached to the seat back 1 at both ends of the rotary shaft 16 to which the headrest device 15 is thus attached by welding means.

Next, the operation of the headrest device 15 configured as described above will be described with reference to FIG. In the figure, when the headrest 12 is manually rotated from the position B where the engaging claw 47 of the pole 45 is engaged with the locking groove 43a of the ratchet 41, the headless bracket 18 is also rotated integrally with each other. It is possible to adjust in four steps by selectively engaging with the stop grooves 43b, 43c, 43d. Then, in order to store the headrest 12 in the storage position A from these adjustment positions, when the headrest 12 is rotated to the front side, the operating claw 28 attached to the bracket plate 20 is exposed on the rotation track. When the pole 45 contacts the escape claw 48 of the shaft 45 and further rotates, the pole 45 rotates in the counterclockwise direction about the pin 51, whereby the center of the hole seat 50 on which the torsion spring 56 is locked is centered on the pin 51 and the spring hole. When passing through a line h connecting 59, the lever 49 is swung at a stroke to hold the lever 49 in contact with the stopper claw 38, and in this state, the engaging claw 47 is retracted from the rotation track of the locking claw 42 of the ratchet 41. Has been done. The rotation of the headrest 12 is restricted at the overstroke position C where the operating claw 28 contacts the escape claw 48 of the pole 45 held at this position.

When rotating from the position C to the rear side, the cam flange surface 25 formed on the circular convex portion 23 of the bracket plate 20 of the headrest bracket 18 contacts the lever 49 of the pole 45 to move the pole 45. When the center of the hole 50 passes through the line h and rotates clockwise around the pin 51, it immediately returns to its original position. At this time, the ratchet 41 has passed, and the headrest 12 should be stored in the storage position A. You can When the headrest 12 is used again, the headrest 12 is lifted and rotated, and at the position B, the pole 45 is engaged with the ratchet 41, and the position can be adjusted by rotating the frontward. be able to. When the hand is released from the headrest 12 at the overstroke position C, the headrest torsion spring 61 biases the headrest 12 to the retracted position A at once.

As described above, in the headrest device 15 of this embodiment, since the storage mechanism 55 is provided in series in addition to the angle adjustment mechanism 40, a series of operations before and after the retracted position A to the overstroke position C can be performed. Since the angle of the headrest 12 can be adjusted and stored, the size of the headrest assembly 11 becomes compact, and the assembly to the seatback 1 is as easy as the headrest 4 using the conventional stay 5, and the conventional Since the operation lever 8 and the like are not required, the number of parts can be reduced, and the corner portion 2 of the seat back 1 can be lowered so that the rear view is not obstructed.

Although the seat back lock plates 64 are attached to both ends of the rotary shaft 16 in the above embodiment, the seat back lock plates 64 may be attached to the seat back 1, but the present invention may be configured as shown in FIGS. 7 and 8.

7 and 8 show a support portion 70 of the rotary shaft 16 provided on the facing surface of the corner portion 2 of the seat back 1, and the support bracket 71 of the support portion 70 is a cushion of the seat back 1. It is attached to a seat frame 66 integrally formed with the pad 65, and an attachment piece 72 and a support plate 73 are formed in a substantially L shape, and the support plate 73 bulges in a substantially U shape on the headrest 12 side. A receiving portion 74 that opens upward is formed at the center of the receiving portion 74, and a substantially U-shaped receiving groove 75 that opens upward and into which the rotating shaft 16 can be fitted is formed at the center of the receiving portion 74. The center point P is the mounting center of the rotary shaft 16. A nut plate 76, to which a weld nut 77 is attached, is attached to the back surface of the receiving portion 74 by welding means so that the center of the weld nut 77 is aligned with the center point P.

Further, substantially flat egg-shaped step plates 78 that can be fitted into the receiving portions 74 are attached to both ends of the rotary shaft 16 by welding means, and the stay plates 78 are provided with a resin coating for preventing noise. Has been done. Further, bushes 79 having flange portions 79a are fitted to both ends of the rotary shaft 16 and fitted into the receiving portion 74 together with the stay plate 78. In this state, the headrest 12 is housed between the corner portions 2, and the rotation shaft 16 is restricted from moving in the length direction L and the width direction W of the corner portion 2. In this state, the headrest 12 is formed on the cushion pad 65 of the corner portion 2. The pilot bolt 80 having the pilot portion 80a on the tip side of the hole 65a is inserted into the weld nut 77, and the pilot portion 80a at the tip portion is inserted into the bush 79 attached to the rotary shaft 16 and is inserted into the weld nut 77. By being screwed, the rotary shaft 16 is held at the center P position, and its movement in the height L direction is restricted, so that the headrest 12 is attached.

[0023]

[Effect of the device]

 Since the present invention is configured as described above, since the storage mechanism is provided in series in addition to the angle adjustment mechanism, the headrest angle can be adjusted by a series of operations before and after moving from the storage position to the overstroke position. Since the headrest assembly can be adjusted and stored, the headrest assembly can be made compact, and it can be easily attached to the seat back as well as the headrest using a conventional stay. Since it is not necessary, the number of parts can be reduced, and the corners of the seat back can be lowered so that the rear view is not obstructed.

[Brief description of drawings]

FIG. 1 is a front view of a headrest.

FIG. 2 is a side view of a headrest.

FIG. 3 is a front view of an angle adjustment mechanism and a storage mechanism of the headrest device.

FIG. 4 is a side view of an angle adjustment mechanism and a storage mechanism of the headrest device.

FIG. 5 is an exploded perspective view of a headless device.

FIG. 6 is an explanatory view of the operation of the headrest device.

FIG. 7 is a partial front view showing another mode of attaching the headless to the seat back.

FIG. 8 is a side view of the same.

FIG. 9 is a perspective view of a conventional stay type headrest.

FIG. 10 is a perspective view of a conventional rotary type headrest.

[Explanation of symbols]

 1 Rear Seat Back 2 Corner 12 Head Rest 15 Head Rest Device 18 Head Rest Bracket 19,20 Bracket Plate 23 Circular Convex 25 Cam Flange Surface 28 Actuating Claw 31 Adjustment Base Bracket 40 Angle Adjusting Mechanism 41 Ratchet 45 Pole 55 Storage Mechanism 56 Torsion Spring A Storage Position B Angle adjustment position C Overstroke position

Claims (1)

[Scope of utility model registration request] 1. A headrest mounted between the corners of a seat back so as to be rotatable about the same rotation axis via a rotation axis. A headrest bracket having bracket plates at predetermined intervals on the rotation axis is integrated with the headrest. An adjustment base bracket that is rotatably provided on the rotary shaft and that opposes the one bracket plate, and an angle adjustment mechanism and a storage mechanism are provided between the bracket plate and the adjustment base bracket in series. A vehicle headrest device having a structure in which a headrest can be set at a storage position, a plurality of stages of angle adjustment positions, and an overstroke position.