KR200421440Y1 - Chair with seat back pivotable elasticlly - Google Patents

Abstract

The present invention relates to a chair having an elastically rotatable seatback.

Chair according to the present invention, the seat frame (seat frame) for supporting the seat; A seatback frame which supports the seatback and is elastically pivotally hinged relative to the seatframe; It includes; and a rotation angle control unit for adjusting the rotation angle of the seat back frame.

Seat back, elastic, pivot, seat, frame, adjustable

Description

Chair with elastically rotating seatback {CHAIR WITH SEAT BACK PIVOTABLE ELASTICLLY}

1 is a side view showing a chair according to an embodiment of the present invention.

Figure 2 is a perspective view showing a seat frame and a seat back frame of a chair according to an embodiment of the present invention.

Figure 3 is a side cross-sectional view showing a state of setting the rotation angle of the seat back and the seat back frame of the chair according to an embodiment of the present invention.

4 is an enlarged detailed cross-sectional view of a portion A of FIG.

Figure 5 is a side cross-sectional view showing a state in which the seat back and the seat back frame of the chair according to an embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of portion B of FIG. 5.

Figure 7 is a detailed cross-sectional view showing an enlarged elastic control of Figure 1;

8 is a bottom perspective view showing a rotation angle control unit of the chair according to an embodiment of the present invention.

Brief description of symbols for the main parts of the drawings

10: seat frame 11: sheet

20: seatback frame 21: seatback

30: rotation angle control unit 40: elastic control unit

The present invention relates to a chair having an elastically rotatable seatback.

In general, a chair is a tool for a person to sit on, such as a seat on which the seat of the seat of the seat is seated, a seat back on which the seat of the seat of the seat is seated, and an arm rest that covers the seat of the seat of the seat. And these are fixedly or variably mounted to the frame.

Chairs can be classified into various types in terms of form, use, structure, and materials. The chairs are divided into stools, chairs, arm chairs, chaise longues, lying chairs, and locking chairs.

In terms of its structure, there are fixed, folding, tiltable, rotary, and assembly type. According to the materials, there are wooden chairs, metal chairs, plastic chairs, etc. According to the material processing technology, it is possible to make chairs shaved by shelves, chairs made of wood, molded plywood chairs, steel pipe chairs, and aluminum chairs.

The materials for seats and seat backs of chairs are fabrics (silk, cotton, magic, wool, chemical fibers), bark, plastic ropes, and straws, cotton cloth, wool, etc. Bird hair, animal hair, hair lock, coil spring, wave spring, foam rubber, urethane foam, etc. are used.

Recently, consumers are not merely thinking about a chair as a tool for sitting, but are demanding various functionalities such as posture correction, ease of use, comfort when sitting, or beautiful appearance.

In view of this, a chair having a structure in which a seatback is elastically pivotable with respect to a pedestal has been widely spotlighted in recent years. That is, the chair of the elastic rotation structure is configured to rotate when the back part of the seated person exerts an external force on the seat back, and the seat back rotates in response to the external force of the seated person.

By this configuration, the seatback has a merit that can give the seater a more comfortable seating by rotating the seatback only if the seater gives a little external force to the seatback.

However, the chair of the elastic rotation structure according to the prior art has a limit that does not properly respond to the needs of the seated occupant as the range of the angle of rotation of the seat back is not properly adjusted.

The present invention has been made in view of the above point, the object is to provide a chair with a more comfortable seating comfort and ease of use.

In addition, the object of the present invention is to provide a chair having an improved seatback capable of appropriately responding to the needs of the seated occupant by allowing the elastic rotation angle of the seatback to be properly adjusted.

The present invention for achieving the above object,

A seat frame for supporting the sheet;

A seatback frame which supports the seatback and is elastically pivotally hinged relative to the seatframe; And

It includes; a rotation angle control unit for adjusting the rotation angle of the seat back frame.

Preferably, the seat frame and the seat back frame are hinged on the hinged portion, and the hinge shaft is provided with at least one torsion spring.

More preferably, the torsion spring has first and second elastic ends, the first elastic end of the torsion spring is supported inside the seat frame, and the second elastic end of the torsion spring is supported inside the seat back frame. .

Preferably, the rotation angle control unit,

A fixing bracket fixedly installed in the seat back frame;

A first pivot angle adjusting member installed to be movable relative to the fixing bracket and having a plurality of locking grooves;

A second rotation angle adjustment member selectively engaged with the locking groove of the first rotation angle adjustment member to adjust the rotation angle of the seat back frame; And

It includes an operation unit for linearly moving the first rotation angle adjustment member.

The second rotation angle adjusting member includes a locking end extended in the longitudinal direction and a hinge end rotatably hinged to the fixing bracket, and adjusting the second rotation angle by the elastic force of the torsion spring mounted on the hinge end. The rotational position of the member is kept constant.

Preferably, the operation portion includes an operation lever rotatably installed on the operation frame, and an operation cable fixed at both ends by extending between the operation lever and the fixing bracket.

More preferably, the operation cable is provided at both ends thereof, and the locking holes are fixed to the operating lever and the fixing bracket individually.

In addition, the outer periphery of the control cable is installed in the outer shell relative to the operation cable, the first end and the second fixing brackets are provided at both ends of the outer shell, each fixing bracket is provided on the operation frame and the first rotation angle adjustment member It is fixedly installed.

The present invention further includes an elastic control unit for adjusting the elastic force of the seat back frame is elastically rotated.

Preferably, the elastic control unit includes a control member moving through any one of the seat frame and / or seat back frame, the pressing hole provided on the upper end of the adjustment member, the pressing plate for pressing one end of the torsion spring.

In addition, according to the present invention, first and second cross members are movably installed at each upper portion of the seat frame and the seat back frame, and seats and armrests are installed across the first and second cross members.

The first cross member is installed to be movable in the front-rear direction by the first guide member provided on the upper portion of the seat frame.

The second cross member is installed to be movable in the front-rear direction by a second guide member provided on the upper portion of the seat back frame, and the second guide member has a curvature surface having a predetermined radius at a portion sliding with the second cross member.

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

1 to 8 is a view showing a chair according to an embodiment of the present invention.

As shown, the subject innovation includes a seat frame 10, seat back frame 20, and the rotation angle adjustment unit 30.

In the seat frame 10, a sheet 11 is disposed at an upper portion thereof, and a support 51 is provided at a lower portion thereof.

The seatback frame 20 is hinged to one side of the seat frame 10 via the hinge shaft 15 so that the seatback frame 20 is rotatably installed relative to the seat frame 10.

On the other hand, at least one torsion spring 25 is installed on the hinge shaft 15 which hinges the seat frame 10 and the seat back frame 20, and the torsion spring 25 is formed of first and second elastic ends ( 25 a, 25 b, the first elastic end 25 a of the torsion spring 25 is supported inside the seat frame 10, and the second elastic end 25 b of the torsion spring 25 is the seat back frame 20. Is supported inside.

By the torsion spring 25, when the seated person is seated on the seat 11, an external force is applied to push the seat back 21 back so that the external force overcomes the spring force of the torsion spring 25 and the torsion spring 25 Is deformed in the circumferential direction, the seat back frame 20 is rotated to the rear, the seat back frame 20 is returned to its original position by the return force of the torsion spring 25 when the external force of the seated person is removed.

Rotating angle adjusting unit 30 is characterized in that the seat frame 10 with respect to the seat frame 10 to adjust the range of the rotation angle as appropriate.

Preferably, as shown in Figures 3 to 6, the rotation angle adjusting unit 30 is a fixed bracket 33 fixedly installed on the seat back frame 20, the fixed bracket 33 is installed to be movable in A second rotation angle adjustment member 32 for adjusting the rotation angle of the seat back frame 20 in cooperation with the first rotation angle adjustment member 31, the first rotation angle adjustment member 31, and the first rotation angle adjustment member. And an operation unit 70 for linearly moving the 31.

One side of the fixed bracket 33 is fixedly installed on the seat back frame 20, and the left and right sides of the other side have a pair of sliding surfaces 33a.
The first rotating angle adjusting member 31 has a plurality of locking grooves 31b on its front face 31a, and the first rotating angle adjusting member 31 is disposed on both left and right sides thereof as shown in FIG. A pair of guide protrusions 31c are provided, and each guide protrusion 31c is guided along each sliding surface 33a of the fixing bracket 33, so that the first pivot angle adjusting member 31 is fixed bracket 33. Move straight along.

The second rotation angle adjusting member 32 has a locking end portion 32a extending in the longitudinal direction and a hinge end portion 32b rotatably hinged to the fixing bracket 33, and the hinge end portion 32b is provided on the hinge end portion 32b. The torsion spring 32c is installed, and the second rotation angle adjusting member 32 is fixed by the spring force of the torsion spring 32c unless the external force greater than the spring force of the torsion spring 32c is applied. Keep the posture constant.

When the first rotational angle adjusting member 31 is moved backward with respect to the fixing bracket 33 as shown in FIG. 4 by the operation unit 70 to be described later, the locking end portion 32a of the second rotational angle adjusting member 32 is used. ) Is spaced apart from the locking groove 31b of the first rotation angle adjusting member 31, and in this state, when the seater rotates the seatback 21 installed in the seatback frame 20 in the direction of arrow K in FIG. ) And the seat back frame 20 rotate with respect to the seat frame 10 at a predetermined angle.
The rotation operation of the seat back 21 and the seat back frame 20 is appropriately adjusted according to the intention of the seated person, and then the first rotation angle adjusting member 31 is moved again by the operation of the operation unit 70. Moving in the S2 direction by selectively engaging the engaging end portion 32a of the second rotation angle adjustment member 32 to any one side of the engaging groove 31b of the first rotation angle adjustment member 31, as shown in FIG. As described above, the rotatable range θ of the seatback 21 and the seatback frame 20 is set.

When the seatback and the seatback frame 20, 21 is rotated range (θ) is set, when the seated person rotates the seatback and the seatback frame (20, 21) by applying an external force, as shown in Figures 6 and 8 The second rotation angle adjusting member 32 is hung by a plurality of limiting protrusions 10a formed at the end of the seat frame 10, and thus the rotation of the seatback frame 20 is restricted by the limiting protrusions of the seat frame 10 ( 10a), the front surface 31a of the first rotational angle adjusting member 31 passes through a plurality of through grooves 10b formed at the end of the seat frame 10.

On the other hand, the operation unit 70 is configured to linearly move the first rotation angle adjusting member 31.

Preferably, the operation unit 70 is as shown in Figs. 3 to 5 between the operation lever 72 rotatably installed on the operation frame 75, both ends between the operation lever 72 and the fixing bracket 33. It is made of an extended and fixed operation cable (71).

The operation lever 72 is hingedly coupled to the operation frame 75 around the hinge point 72b, and an elastic rib 72a is provided at one side thereof, and the elastic rib 72a is an operation frame 75. Or by applying an elastic force to one side thereof serves to keep the rotational state of the operating lever 72 constant.

The operation cable 71 is provided with locking holes 71a and 71b at both ends thereof, and each of the locking holes 71a and 71b is individually fixed to the operation lever 72 and the fixing bracket 33.

An outer shell 74 is installed on the outer circumference of the operation cable 71 so as to be movable relative to the operation cable 71, and both ends of the outer cable 74 are provided with first and second fixing brackets 74a and 74b. , The fixing brackets 74a and 74b are fixed to the operation frame 75 and the first rotation angle adjusting member 31.

As shown in FIG. 3, when the operation lever 72 is rotated in the direction of the arrow R2 of FIG. 3, the operation cable 71 is pulled in the S1 direction, and interlocked with the shell (S1). By the relative movement of 74 in the opposite direction (ie, S2 direction), the first rotation angle adjusting member 31 to which the first fixing tool 74a is fixed moves linearly in the S2 direction.
Further, when the operation lever 72 is rotated in the direction of the arrow R1 of FIG. 3, the operation cable 71 is loosened in the S2 direction, and in conjunction with this, the outer cover 74 relatively moves in the opposite direction (ie, the S1 direction). The first rotation angle adjusting member 31 to which the first fixing tool 74a is fixed moves linearly in the S1 direction.
By the manipulation of the operation unit 70, the first rotation angle adjusting member 31 is linearly moved along the sliding surface 33a of the fixing bracket 33.

In addition, a return spring 76 is interposed between sliding portions of the first pivot angle adjusting member 31 and the fixing bracket 33, and the return spring 76 has both ends 76a, as shown in FIG. 76b) is fitted to the fixing bracket 33, and the elastic portion 76c at the center thereof is installed to elastically support the first rotation angle adjusting portion 31. The return operation after the first rotation angle adjusting member 31 is moved by the elastic force of the return spring 76 may be more smoothly performed.

As described above, the first rotation angle adjustment member 31 is moved by the operation unit 70, and the second rotation angle adjustment unit 30 of the present invention is disposed in the locking groove 31b of the first rotation angle adjustment member 31. As the locking end 32a of the rotation angle adjusting member 32 is selectively locked, the rotation angle of the seat back frame 20 is appropriately adjusted.

In addition, the present invention is further provided with an elastic control unit 40 for adjusting the elastic force of the seat back frame 20 is elastically rotated, the elastic control unit 40 is configured to adjust the elastic force of the torsion spring 25 do.

Preferably, the elastic control unit 40, as shown in Figures 1 and 7, the adjusting member 41 to move through any one of the seat frame 10 and / or seat back frame 20, adjustment The presser 43 provided at the upper end of the member 41, the presser plate 42 which presses the one side end part 25a (the 1st elastic end part) of the torsion spring 25, etc. are comprised.

The adjusting member 41 is composed of an adjusting knob 41a and an adjusting screw 41b. When the adjusting knob 41a is turned, the adjusting screw 41b penetrates the seat frame 10 and moves up and down. An upper end of the adjusting screw 41b is provided with a pressing hole 43 as shown in FIG. 7, which presses the pressing plate 42.

The pressing plate 42 has one side end portion 42a rotatably connected to the seat frame 10, and the other end portion 42b presses one side end portion 25a of the torsion spring 25.

By the configuration of the elastic adjustment unit 40, as the adjusting screw 41b of the adjusting member 41 is moved up and down, the pressing holes 43 are also moved up and down to press the pressing plate 42 to press the pressing plate 42. ) Moves one side end 25a of the torsion spring 25 up and down by tilting the other end up and down about one end connected to the seat frame 10.

As such, as one side end portion 25a of the torsion spring 25 is moved up and down, the elastic force applied to the other end portion 25b of the torsion spring 25 is increased or decreased by the repulsive force. That is, the elastic control unit 40 of the present invention is to adjust the elastic rotational force of the seat back frame 20 by adjusting the elastic force of the torsion spring (25).

1 and 2, the first and second cross members 12 and 13 are movable on upper portions of the seat frame 10 and the seat back frame 20, respectively. The seat 11 and the armrest 52 are provided across the first and second cross members 12 and 13.

The first and second cross members 12 and 13 are provided with mounting seats 12c and 13c at their central portions, and cross the mounting seats 12c and 13c of the first and second cross members 12 and 13. The seat 11 is fixedly installed.

Armrest 52 is provided with a seating portion (52a) for seating the arm of the seated on the upper portion, the first and second mounting portion (52b) mounted to the first and second cross members (12, 13) in the lower portion thereof; 52c). A plurality of fastening holes 12a, 13a, and 13b are formed at both ends of the first and second cross members 12 and 13, and the first and the second through the lower portions of the fastening holes 12a, 13a and 13b. The mounting portions 52b and 52c are fastened and mounted.

Meanwhile, the first and second cross members 12 and 13 have a movable structure, and the seat 11 together with the seat back frame 20 as the seat back frame 20 rotates relative to the seat frame 10. And armrest 52 also moves.

As shown in FIG. 2, the first cross member 12 is installed to be movable in the front-rear direction along a pair of left and right first guide members 16 provided at the upper portion of the seat frame 10. The guide member 16 has a guide surface for guiding the first cross member 12 on its upper surface.

As shown in FIGS. 2 and 3, the second cross member 13 is movable along the left and right pairs of second guide members 17 provided on the upper portion of the seat back frame 20 to move forward and backward. Is installed. In addition, the second guide member 17 has a curvature surface 17a having a predetermined radius on a surface in contact with the second cross member 13. The second cross member 13 can easily cope with the rotational operation of the seat back frame 20 as it moves along this curvature surface 17a.

The present invention as described above, has the effect of more comfortable seating comfort and ease of use is enhanced.

In addition, the present invention has an advantage that can be appropriately respond to the needs of the seated occupant by being able to properly adjust the elastic rotation angle of the seat back.

Claims (13)

A seat frame 1534 110 seat frame for supporting the seat; A seatback frame which supports the seatback and is elastically pivotally hinged relative to the seatframe; And A chair having an elastically rotating seatback comprising a; rotation angle control unit for adjusting the rotation angle of the seat back frame. The method of claim 1, The seat frame and the seat back frame has a hinge shaft is mounted to the hinge coupled portion, the hinge shaft is a chair having an elastically rotating seat back, characterized in that at least one torsion spring is installed. The method of claim 2, The torsion spring has first and second elastic ends, wherein the first elastic end is supported inside the seat frame, and the second elastic end is supported inside the seat back frame. Chair with seat back. The method of claim 1, The rotation angle adjustment unit, A fixing bracket fixedly installed in the seat back frame; A first pivot angle adjusting member installed to be movable with respect to the fixing bracket and having a plurality of locking grooves; A second rotation angle adjustment member selectively engaged with the locking groove of the first rotation angle adjustment member to adjust the rotation angle of the seat back frame; And And a control unit for linearly moving the first rotation angle adjusting member. The method of claim 4, wherein The second rotation angle adjusting member includes a hinge end extended in the longitudinal direction and a hinge end rotatably hinged to the fixing bracket, and adjusting the second rotation angle by an elastic force of a torsion spring mounted to the hinge end. A chair having an elastically rotating seat back, wherein the rotational position of the member is kept constant. The method of claim 4, wherein The operation unit chair having an elastically rotating seat back, characterized in that it comprises an operation lever rotatably installed on the operation frame, the operation cable is fixed to both ends extending between the operation lever and the fixing bracket. The method of claim 6, The operation cable is provided with a locking hole at both ends, each locking hole is a chair having an elastically rotating seat back, characterized in that fixedly coupled to the operating lever and the fixing bracket. The method of claim 7, wherein The outer periphery of the control cable is installed so as to move relative to the control cable, the both ends of the outer shell is provided with first and second fixing brackets, each fixing bracket is provided on the operation frame and the first rotation angle control member A chair having an elastically rotating seat back, characterized in that the fixed installation. The method of claim 1, Any one of the seat back frame and the seat frame is a chair having an elastically rotating seat back, characterized in that it further comprises an elastic control unit for adjusting the elastic force of the seat back frame is elastically rotated. The method of claim 9, The elastic control unit is elastically rotated, characterized in that it comprises a control member for moving through any one of the seat frame and the seat back frame, the pressing hole provided on the upper end of the adjustment member, and the pressing plate for pressing one end of the torsion spring Chair with seat back. The method of claim 1, And each of the seat frame and the seat back frame further includes first and second cross members movably installed on the seat frame and the seat back frame. The method of claim 11, The first cross member is a chair having an elastically rotating seat back, characterized in that installed by the first guide member provided on the upper portion of the seat frame to be movable in the front and rear direction. The method of claim 11, The second cross member is installed to be movable in the front-rear direction by a second guide member provided on an upper portion of the seat back frame, and the second guide member has a curvature surface having a predetermined radius on a portion sliding with the second cross member. A chair having an elastically rotating seat back, characterized in that.

Images