KR200293229Y1 - Tilting apparatus of headrest - Google Patents

Abstract

The present invention relates to a tilting device for a headrest, comprising: a stay having a horizontal portion and a vertical portion; A ratchet movable member fixed to a horizontal part of the stay and having an upwardly projecting rotational shaft and a downwardly engaging projection; A pair of tilting plates coupled between the ratchet movable member and the horizontal part of the stay so as to be tiltable pivotally; A ratchet guide member coupled between the pair of tilting plates so as to be tiltable integrally and having a partial ring-shaped bite-shaped portion opposed to the ratchet movable member; A torsion spring that elastically presses the tilting plate in a reverse direction of the tilting rotation direction outside the pair of tilting plates; A ratchet member having a ratchet type that partially engages the bite-type portion of the ratchet guide member and coupled to a rotational shaft of the ratchet movable member to rotate between the ratchet type and the bite-type portion's mutual bite position and bite release position; And means for fixing the ratchet member in the bite position during the tilting rotation of the pair of tilting plates and in the bite release position during the tilting release rotation, thereby driving safely and comfortably within the extended tilting range. The headrest can be selectively fixed at the position where it can be made, and the overall size and size of the headrest can be reduced to reduce the manufacturing cost and at the same time, the assembly is easy.

Description

Tilting Apparatus for Headrests {TILTING APPARATUS OF HEADREST}

The present invention relates to a tilting device for a headrest, and more particularly, to an apparatus for tilting a headrest installed in the backrest of a car seat in a front-back direction.

As can be seen in FIGS. 1 to 3, the tilting device 100 of the conventional headrest has a tilting housing coupled to the stay 101 and the horizontal part 103 of the stay 101 so as to be tiltable. 110, the ratchet member 120 fixedly installed on the horizontal portion 103 of the stay 101 and disposed in the tilting housing 110 and rotatably coupled to the tilting housing 110 to interact with the ratchet member 120. And a torsion spring 140 which elastically presses the stopping member 130 and the tilting housing 110 in the reverse direction of the tilting direction.

The tilting housing 110 is composed of a pair of plate members bent. These plate members are disposed at intervals sufficient to accommodate the ratchet member 120 and the torsion spring 140 provided along the lengthwise direction of the horizontal portion 103 of the stay 101. In this state, the corresponding bent portions 113a and 113b of the pair of plate members are coupled to each other by, for example, spot welding.

The ratchet member 120 has a disk shape, and the ratchet member 122 is provided in a predetermined length section along its outer circumference. Both end portions of the ratchet die 122 protrude radially to form locking jaws 124a and 124b for restricting the movement of the blocking member 130. One end of the torsion spring 140 is coupled to one side of the latching jaw 124a of the ratchet member 120. On the other hand, the other end of the torsion spring 140 is coupled to the tilting housing 110, whereby the tilting housing 110 is provided with an elastic pressing force in the opposite direction to the tilting rotation direction.

On the other hand, the blocking member 130 is rotatably coupled to the pivot shaft 135 installed in parallel to the horizontal portion 103 of the stay 101 in the tilting housing (110). The blocking member 130 has a bite mold 132 that partially engages the ratchet mold 122 of the ratchet member 120. Further, a line pore spring 145 is interposed between the blocking member 130 and the tilting housing 110 to selectively pressurize the blocking member 130 in a bite position or a release direction of the ratchet member 120.

The conventional tilting device 100 having such a configuration is installed in the headrest 150 detachably coupled to the upper part of the back of the vehicle seat. Here, reference numeral 155, which is not described, is a casing mounted in the headrest 150 in a state in which the tilting device 100 is accommodated. On the other hand, the vertical portion 105 of the stay 101 exposed downward from the headrest 150 is retractably accommodated in the stay accommodation ball (not shown) provided in the upper portion of the backrest. As a result, the driver or the passenger can adjust the height by pressing the headrest 150 in the vertical direction, and at the same time by tilting the front and rear can be fixed in a safe and comfortable position.

However, the tilting device 100 of the conventional headrest has a length defined in the latching jaw 124a and 124b of the ratchet member 120, that is, the ratchet shape 122 of the ratchet member 120 is formed at both sides thereof. Since the tilting rotation can only be made within a predetermined limited range, there is a problem that the angle adjustment of the headrest 150 is inevitably limited.

The tilting device 100 of the conventional headrest also has a large volume due to the configuration in which the ratchet member 120 and the torsion spring 140 are built in the tilting housing 110, and thus, many parts There is a problem that the material purchase cost is increased and the assembly process is very inconvenient.

Therefore, the object of the present invention, in consideration of the problems of the prior art, it is possible to selectively fix the position by simply operating the headrest within a relatively wide tilting rotation range, whereby the driver, such as driving safer and more comfortable To provide a tilting device for the headrest.

Another object of the present invention is to provide a tilting apparatus for a headrest that can reduce its manufacturing cost and can simplify the manufacturing process through small size and light weight.

1 is a perspective view of a tilting device of a conventional headrest,

Figure 2 is a side cross-sectional view of the tilting device of Figure 1,

3 is a cross-sectional view of the tilting apparatus of FIG. 1,

Figure 4 is a perspective view of the tilting device of the headrest according to the present invention,

5 is an exploded perspective view of the tilting apparatus of FIG. 4;

6 is a cross-sectional view of the tilting apparatus of FIG. 4, and

7 to 9 are longitudinal cross-sectional views of the tilting apparatus of FIG. 4, illustrating an operating state of the tilting apparatus of the present headrest.

<Description of the symbols for the main parts of the drawings>

1: tilting device 10: stay

11: horizontal portion 20: ratchet moving member

22: rotating shaft 30: tilting plate

31: rotating shaft groove 35: ratchet guide member

37: bite teeth 40: ratchet member

41: ratchet type 60: torsion spring

65: prefabricated spring 80: headrest

85: case

The object is, according to the present invention, a stay having a horizontal portion and a vertical portion bent in parallel to each other from both ends of the horizontal portion; A ratchet movable member fixed to the horizontal part and having an upwardly projecting pivot shaft and a downwardly engaging projection; A pair of tilting plates coupled between the ratchet movable members so as to be tiltable pivotally about the horizontal portion; A ratchet guide member interposed between the pair of tilting plates, the ratchet guide member having a partial ring-shaped bite-shaped portion corresponding to the ratchet movable member; It is coupled to the horizontal portion is disposed on the outside of the tilting plate, one end is coupled to the tilting plate and the other end is coupled to the latching jaw of the ratchet movable member, the pressing plate elastically pressurized in the reverse direction to the tilting rotation direction Torsion springs; A ratchet member coupled to the pivotal shaft of the ratchet movable member, the ratchet member being rotatable between a mutually bite position and a bite release position of the ratchet guide member; And a position fixing means interposed between the ratchet member and the ratchet movable member to fix the ratchet member to one side of the bite position and the bite release position.

Here, the position fixing means, one end is coupled to the ratchet member and the other end may be composed of a pre-pore spring or torsion spring coupled to the ratchet movable member.

On the other hand, the both sides of the one side of the tilting plate 30 protrudes the ribs 39 horizontally in the plate direction, respectively, the ratchet member 40 at the maximum tilting rotational position of the pair of tilting plate 30 It is preferable to pressurize to the bite release position and to press the bite release position from the tilt release position.

At this time, the outer surface of the ratchet movable member 22 is more preferably formed with a recessed groove 23 for receiving the ratchet member 40 in the release position.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

Figure 4 is a perspective view of the tilting device of the headrest according to the present invention, Figure 5 is an exploded perspective view of Figure 4, and Figure 6 is a cross-sectional view of FIG. As can be seen from these figures, the tilting device 1 of the headrest includes a stay 10 between the ratchet movable member 20 and the ratchet movable member 20 fixedly coupled to the stay 10. A pair of tilting plates 30 opposed to each other, the ratchet guide member 35 installed in the tilting plate 30, the ratchet member 40 interposed between the ratchet guide member 35 and the ratchet movable member 20. And a torsion spring 60 which elastically presses the tilting plate 30 in the reverse direction with respect to the tilting rotation direction.

The stay 10 has the horizontal part 11 and the vertical part 15 which bend | folded the both ends of this horizontal part 11 so as to mutually oppose each other similarly demonstrated with reference to FIGS. 1-3. Each vertical portion 15 is formed with a plurality of vertical adjustment grooves 16 at predetermined intervals along the longitudinal direction thereof. The vertical portion 15 is retractably accommodated in the stay accommodation hole (not shown) formed in the back of the car seat, it is height-adjustable through each vertical adjustment groove (16).

The ratchet movable member 20 has a substantially disk shape, and a fixing groove 21 is formed at the center thereof. A rotating shaft 22 protruding upward in the radial direction is formed on the outer circumference thereof, and a recessed groove 23 is formed in the predetermined length section along the outer circumferential direction from the rotating shaft 22. The ratchet movable member 20 is accommodated in the fixing groove 21, the horizontal portion 11 of the stay 10 is fixed to each other integrally, for example by welding. The pivot shaft 22 and the recess 23 will be described later in detail with reference to the ratchet member 40. On the outer periphery of the ratchet movable member 20, the spring engaging jaw 24 protrudes downward at a position opposite to the pivot shaft 22.

Each of the pair of tilting plates 30 is formed with a rotation shaft groove 31 in the lower portion of the plate surface, and a pair of coupling holes 32 for mutual coupling are formed in the upper portion. The horizontal shaft 11 of the stay 10 is accommodated in each pivot shaft 31 with the ratchet movable member 20 therebetween. Then, the coupling member 33 is coupled to the pair of coupling holes 32 from the outside with the ratchet guide member 35 interposed therebetween, for example. As a result, the pair of tilting plates 30 are combined with the ratchet guide member 35 to enable tilting rotation integrally with the horizontal portion 11 of the stay 10.

The tilting plate 30 is formed with ribs 39 that are bent and extended to face each other from both edges of the upper region. Each of the pair of ribs 39 serves to limit the movement of the ratchet member 40 relative to the tilting plate 30, as will be described in detail below. One end of the torsion spring 60 is in contact with the rear rib 39 of the tilting plate 30 from the rear side. As a result, the tilting plate 30 is elastically pressed in the reverse direction to the tilting rotational direction.

Meanwhile, the ratchet guide member 35 interposed between the pair of tilting plates 30 includes a pair of through holes 36 corresponding to the coupling holes 34 of the tilting plate 30. The ratchet guide member 35 forms a partial ring shape of which the lower side is curved upward, and is disposed above the ratchet movable member 20 with a moving distance of the ratchet member 40. The lower edge on the partial ring of the ratchet guide member 35 is formed with a bite-like portion 37 along its longitudinal direction. The engagement portion 37 is provided in the length section between the ribs 39 on both sides of the tilting plate 30 to engage with the ratchet mold 41 of the ratchet member 40 to limit the movement in the reverse direction.

The ratchet member 40 is interposed between the ratchet guide member 35 and the ratchet movable member 20 between the pair of tilting plates 30. The ratchet member 40 has an upwardly curved lower side and a hatch-shaped upper side, and a ratchet type 41 is provided at the rear upper side in the longitudinal direction thereof. The ratchet teeth 41 are sized to partially engage the bite teeth 37 of the ratchet guide member 35.

The ratchet member 40 is further provided with a pivot shaft 42 recessed inwardly in the lower side front region thereof. The pivot shaft hole 42 is rotatably coupled to the pivot shaft 22 of the ratchet movable member 20, whereby the ratchet member 40 has a ratchet shape 41 of the ratchet guide member 35. It is possible to rotate between the bite position and the bite release position with respect to the bite teeth 37. The lower side of the ratchet member 40 is accommodated in the recessed groove 23 of the ratchet movable member 20 at the release position of the ratchet guide member 35. At this time, both stepped jaw of the recessed groove 23 of the ratchet movable member 20 serves to block the departure of the ratchet member (40).

On the other hand, spring holes 25 and 43 are formed in the rotation shaft 22 of the ratchet member 40 and the ratchet movable member 20, respectively. Both end portions of the ratchet member 40 are coupled to these spring holes 25 and 43, respectively. The ratchet member 40 serves to selectively pressurize the ratchet die 41 and the ratchet guide portion 37 of the ratchet guide member 20 to the bite position or the bite release position.

With this configuration, in order to assemble the tilting device 1 of the headrest, the ratchet movable member 20 is first welded to the horizontal portion 11 of the stay 10. Then, the tilting plate 30 of one side is disposed on one side of the ratchet movable member 20. At this time, the tilting plate 30 can be simply coupled by receiving the stay 10 in the rotation shaft groove 31.

When the one side tilting plate 30 is coupled, the rotation shaft hole 42 of the ratchet member 40 is coupled to the rotation shaft 22 of the ratchet movable member 20, and the ratchet members in each spring hole (25, 43) Combine both ends of (40), respectively. Then, after the ratchet guide member 35 corresponds to the upper portion, the remaining tilting plate 30 is coupled to the horizontal portion 11 of the stay 10 so that the pair of tilting plates 30 face each other. do. Thereafter, the coupling member 33 is forcibly inserted into the pair of coupling holes 32 facing each other of the tilting plate 30 from the outside to be integrally coupled with the ratchet guide member 35.

As such, when the tilting plate 30 and each of the above components are rotatably coupled, the spring engaging jaw 24 of the ratchet movable member 20 is exposed to the lower portion of the tilting plate 30. The spring engaging jaw 24 is coupled to the horizontal portion 11 of the stay 10 to engage one end 61 of the torsion spring 60 disposed outside the tilting plate 30. The other end 63 of the torsion spring 60 is disposed at the rear edge of the tilting plate 30 to complete the assembly.

Operation of the tilting device of the headrest thus assembled is described with reference to FIGS. 7 to 9.

7 is a longitudinal cross-sectional view of a state in which the tilting device is installed in the headrest, and FIGS. 8 and 9 are views illustrating an operating state of FIG. 7, respectively. In these figures, the tilting device 1 is housed in the headrest 80 with the case 85 mounted in the case 85. In the state where the headrest 80 is not tilted, as shown in FIG. 7, the ratchet type 41 of the ratchet member 40 is moved by the ratchet guide member 35 by the elastic force of the ratchet member 40. It is arrange | positioned at the mutual bite position with the bite teeth 37.

In such a state, the headrest 80 can be tilted and pivoted about the horizontal portion 11 of the stay 10 by pressing back. Then, the tilting plate 30 also tilts and rotates integrally with the headrest 80. At this time, the torsion spring 60 elastically presses the tilting plate 30 in the reverse direction with respect to the tilting rotation direction, but the latch The interlocking between the ratchet teeth 41 of the member 40 and the bite teeth 37 of the ratchet guide member 35 is impossible to return to the original position. Therefore, the driver, etc., can fix the headrest 80 to the desired tilting angle position and perform a safe and comfortable driving.

On the other hand, one side rib 39 of the tilting rotating tilting plate 30 pressurizes the ratchet member 40 at its maximum tilting rotating position as shown in FIG. 8. Then, the ratchet member 40 overcomes the elastic force of the ratchet member 40 and rotates to the bite release position with the ratchet guide member 35. At this time, when the pressing force of the headrest 80 is removed, the tilting plate 30 is rotated in the reverse direction of the tilting rotation direction by the elastic force of the torsion spring 60. As can be seen in Figure 9, the tilting plate 30 that rotates in the reverse direction, the other rib 39 presses the ratchet member 40, whereby the ratchet member 40 is ratchet guide member 35 It rotates to the bite position with.

After that, the driver or the like can tilt the headrest 80 in the above-described order, and can simply fix the headrest 80 in a position where the driver can safely and comfortably travel.

On the other hand, in the above-described and illustrated embodiments, the means for fixing the ratchet member 40 to the bite position and the bite release position has been described as limited to the pre-pore spring 65, the position fixing means is only pre-pore spring (65) It is a matter of course that the same purpose and effect as described above can be achieved by deforming to torsion springs as well as compression coil springs or leaf springs.

As described above, according to the present invention, by simply pressing the headrest to move the latch member along the bite-shaped portion provided along the longitudinal direction on the lower side of the ratchet guide member, simply selectively positioned within a relatively wide tilting range. It is possible to fix, thereby providing a tilting device of the headrest, which allows the driver and the like to travel more safely and comfortably.

The tilt apparatus of the headrest can also be reduced in size and weight by significantly reducing its overall volume, thereby reducing manufacturing costs and making it simple to manufacture and assemble.

Claims (5)

A stay (10) having a horizontal portion (11) and a vertical portion (15) bent in parallel to each other from both ends of the horizontal portion (110); A ratchet movable member 20 fixed to the horizontal portion 11 and having a pivot shaft 22 projecting upwardly and a latching projection 24 projecting downward; A pair of tilting plates 30 pivotally rotatable about the horizontal portion 11 with the ratchet movable member 20 therebetween; A ratchet guide member (35) interposed between the pair of tilting plates (30), the ratchet guide member (35) having a partial ring-shaped engagement portion (37) corresponding to the ratchet movable member (20); Is coupled to the horizontal portion 11 is disposed on the outside of the tilting plate 30, one end is coupled to the tilting plate 30 and the other end is coupled to the locking jaw 24 of the ratchet movable member 20 Torsion spring 60 for elastically pressing the tilting plate 30 in the reverse direction with respect to the tilting rotation direction; A ratchet member (40) coupled to the pivot shaft (22) of the ratchet movable member (20), the ratchet guide member (35) being capable of pivoting between a bite position and a bite release position of the ratchet guide member (35); And Tilting device of the headrest which is interposed between the ratchet member 40 and the ratchet movable member 20 comprising means for fixing the ratchet member 40 to any one of the bite position and the bite release position . The method of claim 1, The position fixing means is a tilting device of the headrest, characterized in that the one end is coupled to the ratchet member (40) and the other end is a pre-pore spring (65) coupled to the ratchet movable member (20). The method of claim 1, The position fixing means is a tilting device of the headrest, characterized in that the end is coupled to the ratchet member (40) and the other end is a torsion spring (65) coupled to the ratchet movable member (20). The method of claim 2 or 3, Ribs 39 protrude horizontally in the plate direction on both side edges of the one side tilting plate 30, so that the ratchet member 40 is bitten at the maximum tilting rotation position of the pair of tilting plates 30. Pressing to the release position and the tilting device of the headrest, characterized in that the pressing from the release position to the bite position. The method of claim 4, wherein Tilting device of the headrest, characterized in that the outer surface of the ratchet movable member 22 is formed with a recessed groove 23 for receiving the ratchet member 40 of the bite release position.