KR20140065308A - Headrest controlling apparatus of a chair - Google Patents

Abstract

The present invention relates to a chair comprising: a stationary bracket for adjusting a height of a headrest of a chair, the stationary bracket being fixedly mounted on a rear frame provided on the back of a chair back; A movable member which is coupled to an upper end of a receiving portion of a head supporting member for supporting a neck or head of a user and which is received in the fixing bracket so as to be movable up and down, A movable support provided with a plurality of latching slots; The multi-stage sliding guide device is provided inside the fixing bracket and controls the upper and lower multi-step sliding movement of the movement support. The multi-stage sliding guide device includes one half of the half- A cylindrical fastener accommodated in a stationary pocket; A locking hole fixing pocket for supporting the fixed upper and lower positions of the cylindrical locking hole; A switching member provided at a rear of the through-hole of the stopper fixing pocket to switch a variable back and forth movement of the cylindrical stop; And a restoring spring installed between one end of the switching member and the fixing bracket. The present invention also provides a headrest adjusting device for a chair comprising the multi-stage sliding guide device.

Description

[0001] HEADREST CONTROLLING APPARATUS OF A CHAIR [0002]

The present invention relates to a headrest adjusting device for a chair, and more particularly, to a headrest adjusting device for a chair, which is capable of adjusting the height of a headrest and its front and rear positions while improving simplicity, To provide a chair headrest adjusting device.

Generally, a headrest is provided in a chair, and when the user is seated on the chair and leans his / her head in a state where the user is seated, he / she can comfortably support the user's neck or head. In particular, since the physical conditions are different for each person, researches on a headrest adjusting device that can easily adjust the position and height of the headrest in accordance with the user's physical condition are being continuously conducted.

Particularly, in the conventional headrest adjusting apparatus developed by such a study, the supporting unit is composed of a fixing member and a moving member slidably provided for adjusting the height, and the apparatus adopts the switching member and the push button .

Therefore, when the user is seated in the chair and the headrest is not placed at a desired position such as the head or the neck, the user stands up from the chair and presses the push button provided on the fixing member to set the locking state of the switching member When the push button is released, the switching member is placed in the original position by the elastic body, and is in the locked state. Particularly, the switching member has a curved shape, and one end is provided with a latching protrusion and the other end is provided with a push button. Further, the center of the switching member is rotatably coupled to the fixing member so that the lever principle is applied.

However, in such a conventional headrest adjusting device, since the switching member takes a bending shape and rotates, the space for accommodating the curved switching member is provided between the fixing member and the moving member, It is necessary to secure a sufficient space for the member to rotate. As a result, the moving member is loosely held on the fixing member, and noise is generated due to the front / rear / It can fall.

In order to overcome the limitations of the conventional headrest height control structure, a headrest height adjustment structure as illustrated in FIG. 5 has been proposed and used. According to this, a rear frame (not shown) The multistage moving unit 5 provided in the fixing member 3 provided in the fixing member 3 includes a plurality of locking holes 5a formed in the fixing member 3 in the up and down direction, And a resilient body 5b such as a leaf spring which is resiliently provided on the movable member 4a and which has a latching projection 5b1 which is engaged with one of the plurality of latching holes 5a, In this case, since the switching member itself, which is responsible for the adjustment function, has a structure that is made of a leaf spring exerting an elastic force directly, Has a durability, itgie the height of the headrest by such an external force when the unexpected external force, such as when moving holding the headrest is to transport the chair may be changed may represent a problem in reliability.

In addition, in the case of the headrest adjusting device having such a structure, it is constituted by a linear fixing member and a moving member as in the Utility Model Registration No. 20-0395900 (published on September 14, 2005) It does not present a structure that can change the position, but it has functional limitations.

Particularly, in the case of a high-grade chair, the rear frame itself supporting the seat back, the backrest, and the headrest is tilted rearward to provide a higher level of comfort, so that the height of the headrest provided on the rear frame is increased The position of the head restraint is also moved rearwardly away from the user's head in accordance with the sliding movement of the support rest on the inclined rear frame in the inclined direction, which is considerably inconvenient in use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the conventional art, and it is an object of the present invention to provide a headrest which is capable of improving the operation feeling when adjusting the height of the headrest, minimizing noise, A headrest adjuster for improving the height of the headrest, and a headrest for adjusting the height of the headrest so that the front and rear positions of the headrest can be appropriately adjusted so as to provide a higher convenience to the user in terms of ergonomics And to provide a regulating device.

Further, it is an object of the present invention to provide a means for preventing a safety accident by not completely releasing a headrest in a situation where a user holds a headrest and moves a chair.

In order to achieve the above object, a chair headrest adjusting device according to the present invention is a chair headrest adjusting device for adjusting a height of a chair headrest,

A stationary bracket fixedly installed on a rear frame provided on a back surface of the seat back;

A movable member which is coupled to an upper end of a receiving portion of a head supporting member for supporting a neck or head of a user and which is received in the fixing bracket so as to be movable up and down, A movable support provided with a plurality of latching slots; And

The multi-stage sliding guide device is provided inside the fixing bracket and controls the upper and lower multi-step sliding movement of the movement support. The multi-stage sliding guide device includes one side of the semi-cylindrical recessed groove of the plurality of locking slots, A cylindrical jaw which is received in the pocket; A locking hole fixing pocket for supporting the fixed upper and lower positions of the cylindrical locking hole; A switching member provided at a rear of the through-hole of the stopper fixing pocket to switch a variable back and forth movement of the cylindrical stop; And a restoring spring installed between one end of the switching member and the fixing bracket. The chair headrest adjusting device according to the present invention comprises:

Here, it is more preferable that the fixing bracket and the movable support are formed to be concavely curved toward the front side when viewed from the side.

On the other hand, the cylindrical fastener may be formed of a steel having a high abrasion resistance.

Further, in order to guide a more accurate sliding movement of the movable support so that the movable support is slidably moved in the fixed bracket, the guide plate of the fixed bracket is provided with a shape similar to a skate blade in the longitudinal direction And a guide rail groove formed in the movable support so as to engage with the protruded guide rail may be provided. In addition, when the movable support of the head support member is raised, Is further provided.

The chair headrest adjusting device according to an embodiment of the present invention does not require a space in which a folding switching member must be rotated between the moving member and the fixing member, So that it is possible to minimize front / rear / left / right fluctuations when adjusting the height of the headrest, and to minimize noise due to front / rear / left / right fluctuations.

Further, when the shape of the fixing member and the moving member is formed to have a concavely curved shape toward the front side when viewed from the side, it is possible to adjust the height of the headrest provided on the rear frame that is tilted backward at a certain angle Even if an upward slidable movement of the movable support provided on the fixed bracket on the inclined rear frame occurs in an inclined direction, the position of the headrest can be displaced forward so as not to be excessively moved backward, And provides the effect of responding to the demand for.

In addition, since it is not necessary to provide elasticity to the cylindrical fastening hole that performs the substantial multi-step fastening action, it can be constituted by a rigid body (for example, made of steel) having high abrasion resistance. The durability can be further improved as compared with other general conventional techniques formed of an elastic material.

Further, in a situation where the user holds the headrest member and moves the chair, the headrest member is not completely released from the fixing bracket, so that a safety accident can be prevented in advance.

1 is a rear perspective view of a headrest and a rear frame of a chair equipped with a headrest adjusting apparatus according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of a headrest adjusting apparatus according to an embodiment of the present invention viewed from the back. FIG.
3A and 3B are exploded perspective views of a headrest adjusting apparatus according to an embodiment of the present invention.
FIGS. 4A and 4B are enlarged views showing a state before a headrest is lifted by a headrest adjusting device of a chair according to an embodiment of the present invention; FIG.
4C and 4D are cross-sectional views and enlarged views showing a state in which a headrest is adjusted upward by using a chair headrest adjusting apparatus according to an embodiment of the present invention.
5 is a view illustrating an example of a headrest height adjusting structure according to the related art.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

FIG. 1 is a perspective view of a headrest adjusting device of a chair according to an embodiment of the present invention. FIG. 1 is a perspective view of a headrest adjusting device of a chair according to an embodiment of the present invention. Rear perspective view.

FIG. 2 is an exploded perspective view of a headrest adjusting apparatus according to an embodiment of the present invention, and FIGS. 3a and 3b are exploded perspective views of a headrest adjusting apparatus according to an embodiment of the present invention.

4A and 4B are a cross-sectional view and a main part enlarged view showing a state before the headrest is lifted by a headrest adjusting device of a chair according to an embodiment of the present invention, wherein FIG. 4A is a state before operation of the switching member, And Fig. 4B shows the operating state of the switching member.

FIGS. 4C and 4D are cross-sectional views and a main part enlarged view showing a state in which a headrest is adjusted upward by using a chair headrest adjusting apparatus according to an embodiment of the present invention, FIG. 4C is a state before restoration of the switching member, 4D shows the state after the switching member is restored.

The chair headrest adjusting device according to an embodiment of the present invention basically adjusts the height of the headrest member 40, and as shown in FIGS. 1, 2, 3A, and 3B, (30), a movement support (45), and a multi-stage sliding guide device (50).

More specifically, the fixing bracket 30 is fixedly installed on the rear frame 10 provided on the back surface of the backrest 20; A moving member that is coupled to an upper end of the receiving portion 41 of the head supporting member 40 that supports the user's neck or head and that has a lower end accommodated in the fixing bracket 30 and movable up and down A movement support (45) provided with a plurality of engagement slots (46) formed in a transversely concave shape as a semi-cylindrical shape; And a multi-stage sliding guide device (50) installed inside the fixing bracket (30) for controlling the upward and downward multi-step sliding movement of the movement support (45) And the other end of which is received in the locking hole fixing pocket 55 in the fixing bracket 30;

A pocket is provided which has a thickness smaller than the diameter of the cylindrical holding hole 53 and has a through hole in the front and rear direction to limit the movement of the cylindrical holding hole 53 forward and backward but restrict the upward and downward movements, A locking pawl fixing pocket 55 for guiding the up and down sliding of the locking pawl 55;

A switching member provided at the rear of the through hole of the latching hole fixing pocket 55 so as to be in contact with the rear surface of the latching hole fixing pocket 55 so that the cylindrical latching hole 53 is in contact with the latching hole 55 And the cylindrical stopper 53 is formed to be spaced apart from the rear surface of the stopper fixing pocket 55 so that the cylindrical stopper 53 can be inserted into the stopper fixing pocket 54. [ A locking member 54 having a locking hole receiving surface 54b for allowing the locking hole 54b to move rearward away from the fixing bracket 55 and a handle 54c projecting outward from the fixing bracket 30 is formed on the rear surface of the locking member 54; And

The engaging hole 54a of the switching member 54 is elastically deformed when the engaging hole 54b of the switching member 54 is switched to be positioned behind the cylindrical engaging hole 53, And a restoring spring (56) installed between one end of the switching member (54) and the fixing bracket (53) to restore the position to be positioned behind the cylindrical fastening hole (53) ).

Hereinafter, each component will be described in more detail with reference to the drawings.

1, a lower end of a rear frame 10 installed on a back surface of a backrest 20 can be fixedly installed on a seat of a chair (or a base or a tilting device provided at a lower portion of a seat) The fixing bracket 30 is mounted on the upper portion of the rear frame 10. Of course, although not shown, the fixing bracket 30 may be mounted directly on the seat (or the base or tilting device provided in the lower part of the seat) by increasing its length.

A movable support 45 for supporting the receiving portion 41 of the head supporting member 40 is provided so as to be slidable up and down along the fixed bracket 30 (see arrows in Fig. 1).

The shaft member 43 is inserted into the seating portion 42 formed on the back surface of the receiving portion 41 and bolts together so that the receiving portion 41 constituting the head supporting member 40 is rotatable. For reference, a first bolt hole may be formed in the center of the shaft member 43 for bolt fastening, a fastening rib may be formed on both sides of the fastening part 42, A through hole can be formed. Accordingly, when the bolt is sequentially inserted into the second bolt passage hole and the first bolt passage hole and then fastened by the nut, the bolt fastening is completed. Thereafter, the bolts and nuts can be finished with a cap so as not to be seen from the outside, that is, to improve appearance.

1 and 4D, the headrest adjusting device of the chair according to the embodiment of the present invention is configured such that the movement support 45 of the head supporting member 40 is moved up and down by the fixing bracket 30, And a multistage sliding guide device 50 for moving the multistage sliding guide device 50 so as to move the multistage sliding guide device 50 in a multistage manner. Hereinafter, the respective components will be described in more detail.

First, a cylindrical locking hole 53 is provided in the fixing bracket 30 so as to control the multi-step sliding movement of the movable support 45 in the vertical direction, And the other side is received in the locking hole fixing pocket 55 inside the fixing bracket 30 (see FIGS. 4A and 4D).

2, the fixed bracket 30 is formed by assembling the rear guide plate 31 and the front guide plate 32. Preferably, at the upper end of the front guide plate 32, And the through holes are formed in the front and rear sides with a thickness smaller than the diameter of the cylindrical fastening holes 53 to allow the front and rear movement of the cylindrical fastening holes 53, A locking pocket 55 is formed.

As shown in detail in FIG. 2 in an exploded state, the switching member 54 is provided behind the through-hole of the latching hole fixing pocket 55, (54a) formed to be in contact with the rear surface of the fixed pocket (55) to prevent the cylindrical stopper (53) from moving away from the retention hole fixing pocket (55) The engaging hole receiving face 54b is recessed to be spaced apart from the rear face of the engaging hole fixing pocket 55 so that the cylindrical engaging hole 53 is separated from the engaging hole fixing pocket 55 and can move backward, And a handle 54c protruding outside the rear guide plate 31 of the fixing bracket 30 is provided on the rear surface.

4A). In order to adjust the height of the headrest, when the handle 54c of the switching member 54 is lifted upward, the engagement hole receiving surface 54b is switched to be positioned behind the cylindrical engagement hole 53 In this case, the restoring spring 56 provided between one end of the switching member 54 and the fixing bracket 53 is elastically deformed (in FIGS. 4A to 4D, The height adjustment of the head supporting member 40 is completed as shown in FIG. 4C. When the external force for lifting the knob 54c upward is removed as shown in FIG. 4D, The restoring spring 56 restores the retaining support surface 54a of the front surface of the switching member 54 to the rear of the cylindrical retaining hole 53 so that the restoring spring 56 directly performs multi- A cylindrical catching member 53 There is a need to be made from a rigid material having a strong spring force because it does not resiliently supported.

4C, the height of the head supporting member 40 is adjusted by pulling up or pushing down the movement support 45 supporting the support portion 41 of the head support member 40 The cylindrical catching hole 53 constituting the multi-stage sliding guide device 50 is positioned or released from the corresponding catching slot 46 of the plurality of semicylindrical catching slots 46 formed in the movable support 45, do. Particularly, when the cylindrical hooking opening 43 is located in the semi-cylindrical hooking slot 46 formed in the movable support 45, or when the hooking slot 46 is released, a continuous clicking sound of a clicking sound is generated, Can be further maximized.

2 and 3A, the headrest adjusting apparatus according to the preferred embodiment of the present invention is configured to adjust the headrest when the movable support 45 is slid within the fixed bracket 30, A guide rail 57 formed in the front guide plate 32 of the fixing bracket 30 so as to protrude longitudinally in the same shape as a skate blade in order to guide a more accurate sliding movement of the movable support 45, And a guide rail groove (47) formed in the movable support (45) so as to be engaged therewith in the longitudinal direction.

Further, it is possible to further include departure preventing means for preventing the movement support 45 from being pulled out of the fixing bracket 30 when the movement support 45 of the head supporting member 40 is raised. As shown in Fig. 3A, a detent protrusion 57a protruded from the guide rail 57 as shown in Fig. 3A, and a lower protrusion 57a at the lower end of the guide rail groove 47 of the supporter 45 to catch the detent protrusion 57a. A stop wedge 47a may be provided which is formed as shown in FIG.

Therefore, in a situation where the user holds the headrest member 40 and moves the chair, the headrest member 40 is not completely released from the fixing bracket 30, so that a safety accident can be prevented in advance.

As described above, the chair headrest adjusting apparatus according to an embodiment of the present invention can have the following effects.

According to an embodiment of the present invention, since the space between the movable support 45 and the fixed bracket 30 is minimized, it is possible to minimize front / rear / side-to-side rocking when the headrest member 40 is adjusted in height. Ultimately, since such fluctuations are minimized, it is possible to reduce the noise and improve the operation feeling.

In addition, in the case of a high-grade chair, the rear frame itself supporting the seat back, the backrest, and the headrest is tilted rearward to provide a higher level of comfort. In the case of the embodiment according to the present invention, Even when the rear frame 10 is tilted rearward and tilted to adjust the height of the headrest member 40 provided on the rear frame 10 to be elevated, The position of the receiving portion 41 of the head supporting member 40 is moved upwards (? V) as a result of the sliding movement in the curved and inclined direction concave toward the front, (Not shown) that is automatically generated by the inclination of the tilting so that the backward movement of the receiving portion 41 is prevented from being excessively moved backward .

In addition, since it is not necessary to provide elastic force directly to the cylindrical fastening hole that performs a substantial multi-step fastening action in the cascade sliding movement process, it can be constituted of a rigid body having high abrasion resistance (for example, made of steel) / RTI >

The head restraint member 40 further includes a release preventing means for preventing the movement support arm 45 from coming off the stationary bracket 30 when the movement support arm 45 of the head support member 40 is raised. Thereby preventing a safety accident from being detached from the seat 30.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

10: rear frame 20: chair back
30: fixing bracket 31: front guide plate
32: rear guide plate 40: headrest member
41: Support part 45: Moving support
50: Multistage sliding guide device
53: cylindrical engaging member 54: switching member
55: Retaining wall fixing pocket 55: Restoring spring

Claims (6)

A chair headrest adjusting device for adjusting a height of a chair headrest,
A stationary bracket fixedly installed on a rear frame provided on a back surface of the seat back;
A movable member which is coupled to an upper end of a receiving portion of a head supporting member for supporting a neck or head of a user and which is received in the fixing bracket so as to be movable up and down, A movable support provided with a plurality of latching slots; And
The multi-stage sliding guide device is provided inside the fixing bracket and controls the upper and lower multi-step sliding movement of the movement support. The multi-stage sliding guide device includes one side of the semi-cylindrical recessed groove of the plurality of locking slots, A cylindrical jaw which is received in the pocket; A locking hole fixing pocket for supporting the fixed upper and lower positions of the cylindrical locking hole; A switching member provided at a rear of the through-hole of the stopper fixing pocket to switch a variable back and forth movement of the cylindrical stop; And a restricting spring installed between one end of the switching member and the fixing bracket. The chair headrest adjusting device according to claim 1, The method according to claim 1,
Wherein the fixing bracket and the movement support are formed to have a concave curved shape forward when viewed from the side. A chair headrest adjusting device for adjusting a height of a chair headrest,
A fixing bracket (30) fixedly mounted on a rear frame for supporting a back of a chair;
A moving member that is coupled to an upper end of the receiving portion 41 of the head supporting member 40 that supports the user's neck or head and that has a lower end accommodated in the fixing bracket 30 and movable up and down A movement support (45) provided with a plurality of engagement slots (46) formed in a transversely concave shape as a semi-cylindrical shape; And
A multi-stage sliding guide device (50) installed inside the fixing bracket (30) for controlling the upward and downward multi-step sliding movement of the movable support (45), wherein one side of the semi-cylindrical recessed groove And the other end thereof is received in a locking hole fixing pocket 55 in the fixing bracket 30;
A pocket is provided which has a thickness smaller than the diameter of the cylindrical holding hole 53 and has a through hole in the front and rear direction to limit the movement of the cylindrical holding hole 53 forward and backward but restrict the upward and downward movements, A locking pawl fixing pocket 55 for guiding the up and down sliding of the locking pawl 55;
A switching member provided at the rear of the through hole of the latching hole fixing pocket 55 so as to be in contact with the rear surface of the latching hole fixing pocket 55 so that the cylindrical latching hole 53 is in contact with the latching hole 55 (54a) for supporting the latching hole (54a) to prevent the latching hole (53) from moving backward, and a recessed portion A locking member 54 having a locking hole receiving surface 54b for allowing the locking member 54 to move rearward away from the fixing bracket 55 and a handle 54c projecting outward from the fixing bracket 30 is formed on the rear surface of the locking member 54; And
The engaging hole 54a of the switching member 54 is elastically deformed when the engaging hole 54b of the switching member 54 is switched to be positioned behind the cylindrical engaging hole 53, And a restoring spring (56) installed between one end of the switching member (54) and the fixing bracket (53) to restore the position to be positioned behind the cylindrical fastening hole (53) The chair headrest adjusting device according to claim 1, The method of claim 3,
Wherein the fixing bracket (30) and the movement support member (45) are formed to have a concavely curved shape toward the front side when viewed from the side. 5. The method of claim 4,
The fixing bracket 30 is constructed by assembling the rear guide plate 31 and the front guide plate 32,
A guide rail 57 protruding in the longitudinal direction from the front guide plate 32 of the fixing bracket 30 and a guide rail groove 47 formed in the movement support 45 in the longitudinal direction Wherein the headrest restraining device comprises: 6. The method of claim 5,
A detent protrusion 57a protruding from the guide rail 57 and preventing detachment of the movable support 45 from the fixed bracket 30 when the movable support 45 is raised, A stop wedge 47a formed at the lower end of the guide rail groove 47 of the support base 45 is additionally provided so as to be caught by the detent projection 57a Wherein the headrest restraining device comprises:

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