KR101672965B1 - Headrest Moving Device - Google Patents

Abstract

The present invention relates to a headrest moving apparatus, and more particularly, to a headrest moving apparatus which has a plurality of width direction teeth and a plurality of lengthwise teeth meshing with each other when the first and second gears, The present invention relates to a headrest moving apparatus which is capable of finely adjusting a position of a headrest and holding a high load, and is operable even when a part of a tooth is separated, thereby providing a durable headrest.

Description

[0001] Headrest Moving Device [

The present invention relates to a headrest moving apparatus, and more particularly, to a headrest moving apparatus which has a plurality of width direction teeth and a plurality of lengthwise teeth meshing with each other when the first and second gears, Since a plurality of teeth are provided, the position of the headrest can be finely adjusted and the high load can be maintained. Therefore, the teeth can be finely formed, thereby making the apparatus compact and improving the operation feeling. To thereby provide a durable headrest moving apparatus.

The conventional headrest moving device includes a tilting structure capable of arbitrarily adjusting the distance from the back of the occupant to the headrest by rotating the headrest about a fixed point in a fixed state on the backrest and inclining the headrest at a predetermined angle, Rest was proposed.

In addition, when the headrest sliding structure or the tilting structure is applied, Korean Patent Registration No. 790535, Korean Utility Model Application No. 2000-0015501, Korean Patent Registration No. 403478, Korean Patent Publication No. 2007-0105210, As disclosed in Publication No. 2011-0221250, a plurality of teeth are formed along the longitudinal direction to adjust the position of the headrest. In order to finely adjust the position of the headrest in such a conventional structure, there is a problem in that when the teeth are made smaller, the durability of the teeth is lowered and the teeth are easily damaged. In addition, there is a problem in that it is not possible to operate when some teeth are separated.

Disclosure of the Invention The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a headrest moving device which can finely adjust a position of a headrest and can hold a high load, It has its purpose.

In order to achieve the above-mentioned object, a headrest moving device of the present invention comprises a first gear having a plurality of teeth formed along a width direction and a length direction, and a second gear having a plurality of teeth formed along a width direction and a longitudinal direction, Wherein the second gear is moved with respect to the first gear, the second gear is fixed with respect to the first gear and meshing is maintained, and when the first gear and the second gear are engaged with each other The width direction tooth teeth and the plurality of longitudinal teeth teeth are engaged with each other.

According to an aspect of the present invention, there is provided a headrest moving apparatus for sliding or tilting a headrest with respect to a seat, comprising: a first gear having a plurality of teeth formed along a width direction and a longitudinal direction; And a second gear formed along the width direction and the longitudinal direction and being moved with respect to the first gear, wherein when the first gear and the second gear mate, a plurality of width direction teeth and a plurality of length tooth teeth Are engaged with each other.

According to an aspect of the present invention, there is provided a headrest moving apparatus for sliding or tilting a headrest with respect to a seat, comprising: a first gear having a plurality of teeth formed along a width direction and a longitudinal direction; And a second gear formed along the width direction and the longitudinal direction, wherein when the headrest is moved with respect to the seat, the second gear is moved with respect to the first gear, When the two gears mate with each other, a plurality of widthwise teeth and a plurality of longitudinal teeth are engaged with each other.

At least one of the first gear and the second gear may be formed by joining a plurality of plates having a plurality of teeth in a longitudinal direction, thereby forming a tooth along the width direction.

The first gear is rotatable and includes a spring for maintaining the meshing state of the first and second gears and a spring for automatically releasing the first gear when the first and second gears are separated from the headrest, A main spring may be provided to move the headrest back to its original position.

According to the headrest moving apparatus of the present invention as described above, the following effects can be obtained.

A plurality of width direction teeth and a plurality of lengthwise teeth are meshed with each other when the first and second gears in which a plurality of teeth are formed along the width direction and the length direction are mated with each other, Even when a plurality of widthwise fine gears are engaged with each other, the tooth profile can be held even during a high load, so that the position of the headrest can be finely adjusted. For example, in the past, the headrest could be adjusted to only about three levels, but the present invention can be finely adjusted to nine or more levels.

Further, the tooth profile can be finely formed, which makes it possible to make the apparatus compact and improve the operation feeling.

In addition, even if some teeth are removed, operation is possible and durability is excellent.

At least one of the first gear and the second gear is formed by joining a plurality of plates having a plurality of teeth formed along the longitudinal direction to form a tooth along the width direction, There is no need to replace the plate having the damaged tooth, so that the maintenance cost is reduced. In addition, in the prior art, the gear process is complicated by casting, forging, and finishing. However, the present invention is advantageous in that the plate can be processed by a press, thereby simplifying the machining process.

The first link may include a first link connected to the seat, a second link rotatably installed at one side of the first link, a third link rotatably installed at the other side of the first link, Further comprising a fourth link which is pivotally connected to the third link and to which the other end is rotatably connected, the headrest is connected to the fourth link, the first gear is connected to the first link And the second gear is connected to the second link to adjust the position by finely sliding the headrest in the forward and backward directions.

A first bracket installed on a horizontal rod connected to the seat, and a second bracket rotatably installed on the horizontal rod and connected to the headrest, wherein the first bracket is rotatable Wherein the second bracket is provided with the second gear and both ends of the first bracket are connected to the first gear to maintain the meshing state of the first and second gears, A spring is provided to maintain the disengaged state of the two gears, and the position of the headrest can be adjusted by slightly tilting the headrest in the forward and backward directions.

1 is a perspective view of a headrest moving apparatus according to a first embodiment of the present invention;
Fig. 2 is a perspective view of the first gear of Fig. 1; Fig.
Figure 3 is a second gear perspective view of Figure 1;
FIG. 4 is an exploded perspective view of FIG. 1. FIG.
Fig. 5 is a front view of Fig. 4; Fig.
Figure 6 is a side view of Figure 4;
FIG. 7 is a rear perspective view of FIG. 4; FIG.
Figure 8 is a plan view of Figure 4;
9 is a sectional view taken along line aa of Fig.
10 is an operational state view showing a state of operation of the headrest moving device according to the first embodiment of the present invention.
11 is a perspective view of a headrest moving device according to a second embodiment of the present invention.
12 is an assembled perspective view of Fig.
Fig. 13 is a side view of Fig. 12; Fig.
Fig. 14 is a front view of Fig. 12; Fig.
Fig. 15 is a state in which the side wall disposed on the right side of the second bracket is removed in Fig.
16 is an operational state view showing the operation state of the headrest moving device according to the second embodiment of the present invention;

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

For reference, the same components as those of the conventional art will be described with reference to the above-described prior art, and a detailed description thereof will be omitted.

≪ Embodiment 1 >

1 to 10, the headrest moving apparatus of the present embodiment includes a first gear 100 having a plurality of teeth 150 formed along the width direction and the longitudinal direction, a plurality of teeth 240, Wherein one of the first gear (100) and the second gear (200) is connected to the seat, and the other is connected to the headrest And a plurality of width directional teeth 150 and 240 and a plurality of longitudinal teeth 150 and 240 are engaged with each other when the first gear 100 and the second gear 200 mate with each other .

The first gear 100 is disposed vertically along the front-rear direction and is formed into a plate shape, and a plurality of teeth 150 are formed on the upper portion along the width direction and the longitudinal direction.

The first gear 100 is installed on the first link 300 described below and is connected to the seat.

The first gear 100 includes a plurality of plates 100a having a plurality of teeth 150 formed along the longitudinal direction thereof coupled to each other along the width direction to form a plurality of teeth 150 along the width direction.

The first gear 100 has a first protrusion 130 formed at a front lower portion thereof and a coupling hole 110 formed at a rear lower portion thereof to penetrate the first gear 100 in the width direction.

A spring-receiving hole 120 is formed in the lower portion of the first gear 100 so as to be disposed in front of the fastening hole 110.

The first engaging portion 140 protrudes rearward to be disposed behind the teeth 150 on the rear of the first gear 100.

In addition, a second protrusion 160 protrudes rearward from a rear lower portion of the first gear 100. Below the second protrusion 160, a latching jaw 304 of the first link 300 described below is disposed.

The second gears 200 are arranged vertically along the front-rear direction and are formed into a plate shape, and a plurality of teeth 240 are formed at the lower portion along the width direction and the longitudinal direction.

The teeth 150 and 240 of the first and second gears 100 and 200 are configured to allow movement in one direction (forward) but not in the opposite direction (rearward).

The second gear 200 is installed on the second link 400 described below and is connected to the headrest.

The second gear 200 includes a plurality of plates 200a having a plurality of teeth 240 formed along the longitudinal direction thereof coupled along the width direction to form a plurality of teeth 240 along the width direction.

The teeth 240 formed along the longitudinal direction are formed along the arc shape.

A second engaging portion 230 is formed on the rear of the second gear 200 to engage with the first engaging portion 140 of the first gear 100 so as to protrude forward. The second latching portion 230 is disposed at the rear lower portion of the tooth 240.

The second gear 200 is provided with a guide plate 220 on the left side and an auxiliary plate 210 on the right side. A coupling hole is formed in the second gear 200, the guide plate 220 and the assisting plate 210, and is installed in the second link 400.

The guide plate 220 is installed to protrude downward from the plate 200a to guide the first gear 100 engaged with the second gear 200. [

The auxiliary plate 210 is disposed between the second link 400 and the second gear 200 to adjust the separation distance between the second link 400 and the second gear 200.

The first link 300 is installed at the central portion of the horizontal rod of the stay rod 730 connected to the seat and is connected to the seat.

The first link 300 includes sidewalls 301 and 302 vertically disposed on both sides and a bottom surface 303 connecting the bottoms of the sidewalls 301 and 302 and installed on the horizontal rod.

The side walls 301 and 302 are formed with fastening holes 310 and 320 penetrating in the width direction. The fastening holes 310 and 320 are disposed at the front and rear, respectively.

The side wall 301 disposed on the right side is formed with a first gear coupling hole 330 penetrating in the width direction so as to be disposed on the upper side of the coupling holes 310 and 320. A shaft is inserted into the first gear coupling hole 330 and the coupling hole 110 of the first gear 100 so that the first gear 100 is rotatably installed on the first link 300.

The side wall 301 is formed with a spring insertion hole 340 so as to be disposed in the upper part of the fastening holes 310 and 320 and in front of the first gear engagement hole 330.

A locking protrusion 304 protrudes rearward from the rear of the side wall 301 so as to be disposed below the first gear fixing hole 330.

The second link 400 is rotatably installed on one side (front side) of the first link 300 through an axis.

The second link 400 includes a front surface 401 and side walls 402 and 403 formed on both sides of the front surface 401.

The side walls 402 and 403 are provided with fastening holes 430 and 420 at upper and lower portions thereof and the shaft is inserted into the fastening holes 430 and 420 so that the second link 400 rotates the first link 300, (Not shown). The fastening holes 430 and 420 are staggered so that fastening holes 420 disposed at the bottom are disposed at the front.

A plurality of second gear engagement holes 410 are formed in the front and rear direction so as to be disposed between the fastening holes 430 and 420 in the side wall 402 disposed on the right side. A groove is formed outside the side wall 402 to communicate with the second gear engagement hole 410. The groove is formed by bending a part of the side wall 402 inward.

A fastening member such as a bolt is inserted into the fastening hole formed in the second gear 200 and the second gear fastening hole 410 so that the second gear 200 is fixed to the second link 400.

The third link 500 is rotatably installed on the other side (rear side) of the first link 300.

The third link 500 includes side walls 501 and 503 formed on both sides of the rear surface 502 and the rear surface 502. [

A stone plate 504 is formed on the front lower portion of the side wall 501 disposed on the right side.

Fastening holes 510 and 520 are formed on the upper and lower portions of the side walls 501 and 503, respectively.

The third link 500 is disposed in an inclined manner so that the fastening holes 520 disposed at the bottom are disposed at the front side.

The shaft is inserted into the fastening holes 510 and 520 so that the third link 500 is pivotally connected to the first link 300 and the fourth link 600.

The fourth link 600 is rotatably connected to the second link 400 at one side (front side) and the other side (rear side) is rotatably connected to the third link 500.

The fourth link 600 is disposed on both sides of the apparatus.

The fourth link 600 includes a side plate 602 and a mounting plate 601 bent outwardly in front of the side plate 602.

The mounting plate 601 is provided with a headrest.

In the side plate 602, fastening holes 610 and 620 are formed in front and rear, respectively.

The shaft is inserted into the fastening holes 610 and 620 so that the front and rear of the fourth link 600 are rotatably installed on the second link 400 and the third link 500.

Both ends of the spring 710 are engaged with the first gear 100 and the spring fitting holes 120 and 340 of the first link 300 so that the first and second gears 100 and 200 And maintains the disengagement state of the first and second gears 100 and 200. That is, the spring 710 is formed in an omega shape so that when the first and second gears 100 and 200 are engaged, an elastic force is applied to the first gear 100 so as to maintain the engaged state, When the first and second gears 100 and 200 are separated from each other, an elastic force is applied to the first gear 100 so that the released state is maintained.

Further, when the first and second gears 100 and 200 are separated from each other, a main spring 720 is provided to automatically move the headrest backward (return to its original position) unless a special force is applied to the headrest .

The main spring 720 is fitted to a shaft connecting the first link 300 and the third link 500 and has both ends connected to the first link 300 and the third link 500.

Hereinafter, the operation of the present embodiment having the above-described configuration will be described.

In order to slide the headrest forward, when the user pushes the headrest forward, the teeth 150 and 240 are formed to allow the second gear 200 to be moved forward with respect to the first gear 100 The headrest (the second gear, the second, third, and fourth links) is slid forward with respect to the stay rod 730 (the first gear, the first link). The first and second gears 100 and 200 are engaged with each other, and the engagement state is stably maintained by the spring 710. Thus, when the headrest is moved to the desired position, The position of the rest is fixed.

When the first gear 100 and the second gear 200 mate with each other, a plurality of width directional teeth 150 and 240 and a plurality of lengthwise teeth 150 and 240 are engaged with each other.

Therefore, even if one of the plurality of width directional teeth 150 and 240 is separated, the other teeth 150 and 240 on the same width direction are engaged with each other, so that the engagement state is stably maintained. Further, when the teeth are mated, the plurality of width directional teeth 150 and 240 and the longitudinal teeth 150 and 240 are engaged with each other at the same time, so that durability can be maintained even under high load.

Also, as shown in FIG. 10, the headrest can be finely adjusted (1step to 9step) by the plurality of longitudinal teeth 150, 240. As shown in FIG.

The first gear 140 of the first gear 100 is engaged with the second gear 230 of the second gear 200 when the headrest is moved to the frontmost position The first gear 100 is rotated and the first gear 100 is disengaged from the second gear 200. The released state of the first and second gears 100 and 200 is maintained by the spring 710. The second link 400, the second gear 200, the third link 500 and the fourth link 600 are moved by the resilient force of the main spring 720 to the stay rod 730, The link 300 and the first gear 100 are moved backward. When the headrest is moved to the rearmost position, the first and second gears 100 and 200 are engaged with the front surface 401 of the second link 400, and the first gear 100 ).

In this way, when the headrest is fixed in position, the two gears are engaged. When the headrest is moved backward, the headrest is automatically moved to the last chamber when the force is removed after the headrest is moved to the forefront. A headrest moving device having a spring for maintaining the engagement and disengagement of the headrest is disclosed in the prior art and will not be described in further detail.

≪ Embodiment 2 >

11 to 16, the headrest moving apparatus according to the second embodiment includes a stay rod 730 'which is connected to the seat, and which is provided on the horizontal rod of the stay rod 730' The first bracket 900 includes a first bracket 900 and a second bracket 800 rotatably installed on the horizontal rod and connected to the headrest. The first bracket 900 includes the first gear 100 ' And the second gear 200 'is installed on the second bracket 800. Both ends of the second bracket 900 are connected to the first bracket 900 and the first gear 100' A spring 710 'for maintaining the meshing state of the first and second gears 100' and 200 'or maintaining the disengagement state of the first and second gears 100' and 200 'is provided.

The detailed description of the same configuration as in the above-described embodiment will be omitted.

The first gear 100 'is formed with a plurality of teeth 150' in the front and rear direction and the width direction, and the first engaging part 140 'is formed to protrude upward from the rear of the tooth 150'.

In the first gear 100 ', coupling holes are formed in the upper portion so that a plurality of plates 100a' can be coupled to each other.

The first gear 100 'is formed with a fastening hole into which a shaft is inserted under the coupling hole.

The first gear 100 'is formed with a spring-receiving hole into which one end of the spring 710' is inserted so as to be disposed in front of the coupling hole.

The second gear 200 'is formed with a fastening hole such that the plurality of plates 200a' are coupled to each other and the second gear 200 'is fastened to the second bracket 800.

A plurality of teeth 240 'are formed in the front and rear directions and in the width direction below the second gear 200'.

The first bracket 900 includes side walls 910 and 920 disposed on both sides in the front-rear direction and rear surfaces 930 connecting the rear sides of the side walls 910 and 920.

A first gear engagement hole 901 is formed in a width direction above the side walls 910 and 920. The first gear fixing hole 901 is provided with a shaft passing through the first gear 100 'and the first gear 100' is rotatably mounted on the first bracket 900.

Below the side walls 910 and 920, a through hole 904 through which the horizontal rod passes is formed, and the first bracket 900 is fixed to the horizontal rod. Thus, the first bracket 900 is connected to the seat.

The first bracket 900 is disposed on the left side of the main spring 720 'fitted in the middle of the horizontal rod.

A spring insertion hole 902 is formed in the upper portion of the front side of the side wall 910 disposed on the right side to receive the other end of the spring 710 '.

In addition, a main spring fitting groove 903 is formed in the front lower portion of the side wall 910 to receive one end of the main spring 720 '.

The second bracket 800 includes side walls 810 and 820, which are disposed on both sides and are arranged vertically in the front-rear direction.

A through hole 805 through which the horizontal rod penetrates is formed in a lower portion of the side walls 810 and 820. The second bracket 800 includes a stay rod 730 'and a first bracket 900 and a first gear 100' As shown in Fig.

In the side wall 810 disposed on the right side, a main spring insertion hole 811 is formed in which the other end of the main spring 720 'is inserted.

The side walls 810 and 820 include a first bent portion 806 bent inward at an intermediate portion thereof, a second bent portion 807 bent upward at an end of the first bent portion 806, A third bent portion 801 bent outward is formed at the upper end of the portion 807.

A curved portion 804 bent in a waveform is formed in the middle portion of the side walls 810 and 820 and the first bent portion 806 to improve durability.

In the second bent portion 807, fastening holes 803 are formed in front and rear in the width direction so that the second gear 200 'can be installed and the side walls 810 and 820 on both sides are coupled to each other. Accordingly, the second gear 200 'is fixed to the second bracket 800.

The headrest can be stably connected to the second bracket 800 due to the third bent portion 801. [

A first latching protrusion 821 is formed at a front side of the side wall 820 disposed at the left side and a second latching portion 822 is formed at a rear upper portion thereof and a first latching portion 140 'of the first gear 100' And a second engaging protrusion 823 is formed at the rear lower portion.

The second gear 200 'is disposed between the upper portion of the left side wall 820 of the second bracket 800 and the upper portion of the right side wall 810 of the second bracket 800, A first gear 100 'is disposed between an upper portion of the left side wall 920 and an upper portion of the right side wall 910.

The left side wall 820 of the second bracket 800, the left side wall 920 of the first bracket 900, the right side wall 910 of the first bracket 900, the main spring 720 ' The right side wall 810 of the second bracket 800 is sequentially fitted to the horizontal load central portion of the stay rod 730 '.

Hereinafter, the operation of the present embodiment having the above-described configuration will be described.

As shown in FIG. 16, when the headrest is tilted forward, when the user pushes the headrest forward, the teeth 150 'and 240' The headrest (the second gear, the second bracket) is tilted forward with respect to the stay rod 730 '(the first gear, the first bracket). The first and second gears 100 'and 200' are engaged with each other when the headrest is pushed forward to a desired position by the user, and the engagement state is stably maintained by the spring 710 ' So that the position of the headrest is fixed.

When the headrest is to be moved rearward, the headrest is pushed to the foremost position so that the first engaging portion 140 'of the first gear 100' is engaged with the second engaging portion 822 of the second bracket 800 The first gear 100 'is rotated and the first gear 100' is disengaged from the second gear 200 '. The separated state of the first and second gears 100 'and 200' is held by the spring 710 '. The headrest and the second bracket 800 and the second gear 200 'are engaged with the first gear 100' and the first bracket 900 and the stay rod 730 'by the elastic force of the main spring 720' As shown in Fig. When the second bracket 800 is moved to the rearmost position, the first gear 100 'is caught by the first engaging projection 821 and the first gear 100' is engaged with the front of the second gear 200 ' do.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims .

DESCRIPTION OF REFERENCE NUMERALS
100: first gear 200: second gear
100a, 200a: plate 150, 240: tooth profile
300: first link 400: second link
500: third link 600: fourth link
710: spring 720: main spring
730: Stay Road

Claims (5)

A first gear in which a plurality of teeth are formed along the width direction and the longitudinal direction;
And a second gear in which a plurality of teeth are formed along the width direction and the longitudinal direction,
The second gear is moved with respect to the first gear, the second gear is fixed with respect to the first gear to maintain meshing,
Wherein a plurality of width directional teeth and a plurality of lengthwise teeth are meshed with each other when the first gear and the second gear are mated to fix the position of the headrest. A headrest moving device for sliding or tilting a headrest relative to a seat,
A first gear in which a plurality of teeth are formed along the width direction and the longitudinal direction;
A plurality of teeth formed in the width direction and the longitudinal direction, and a second gear which is moved with respect to the first gear,
Wherein a plurality of width directional teeth and a plurality of lengthwise teeth are meshed with each other when the first gear and the second gear are mated to fix the position of the headrest. A headrest moving device for sliding or tilting a headrest relative to a seat,
A first gear in which a plurality of teeth are formed along the width direction and the longitudinal direction;
And a second gear in which a plurality of teeth are formed along the width direction and the longitudinal direction,
When the headrest is moved relative to the seat, the second gear is moved with respect to the first gear,
Wherein a plurality of width directional teeth and a plurality of lengthwise teeth are meshed with each other when the first gear and the second gear are mated to fix the position of the headrest. 4. The method according to any one of claims 1 to 3,
Wherein at least one of the first gear and the second gear is formed by coupling a plurality of plates having a plurality of teeth in a longitudinal direction thereof to form a tooth along the width direction. The method according to claim 2 or 3,
The first gear is rotatable,
A spring for maintaining the engagement state of the first and second gears, and a spring for automatically moving the headrest to the original position when the first and second gears are separated from the headrest, And a headrest moving device for moving the headrest.

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