KR102104462B1 - Chair assembly having multi limited tilting function and chair including the same - Google Patents

Abstract

The present invention relates to a chair assembly having a multi-limited tilting function and a chair including the same. An objective of the present invention is to provide a chair assembly having a multi-limited tilting function and a chair including the same which adjust a contact distance between a limit shaft connected to a backrest frame and a limit multi-stage block in multiple stages by a straight-line motion of the limit multi-stage block by a rotating operation of a limit lever to freely adjust a tilting angle range of the backrest frame for user convenience. The chair assembly having a multi-limited tilting function comprises: a tilt housing; a main shaft allowing both ends thereof to be inserted into a tilt hole formed on the rear end of a side of the tilt housing, and allowing one side of a backrest frame rotated around a main pivot to be connected thereto and installed thereon; an elastic support unit installed in the tilt housing to elastically support the main shaft towards the rear end; and a tilt limit unit connected to and installed on the main shaft and the tilt housing to change a moving range of the main shaft in the tilt hole in accordance with an elastic force of the elastic support unit. The tilt limit unit is installed to allow a limit multi-stage block to horizontally reciprocate straight by rotation of a limit lever. A limit shaft is connected to and installed on the main shaft to adjust a contact distance (L) between an adjustment step surface of the limit multi-stage block and a contact support of the main shaft by a straight-line movement of the limit multi-stage block to change a moving range of the main shaft in the tilt hole to adjust a tilt angle range of the backrest frame.

Description

Chair assembly with multi-limited tilt function and chair with same {Chair assembly having multi limited tilting function and chair including the same}

The present invention relates to a chair assembly having a multi-limit tilt function and a chair having the same, wherein the tilt angle range of the back frame is freely adjusted in multiple stages, and the back frame is tilted within a predetermined tilt angle range. When the force applied to is removed, it relates to a chair assembly having a multi-limit tilt function, in which the back frame is automatically returned to its original position (initial position) by an elastic force and a chair in which the chair assembly is installed.

In general, the chair is configured to include a seat plate and a leg supporting the seat plate, and a backrest coupled to the seat plate or leg to support the user's back, and to improve the comfort of the seated person, the angle adjustment to adjust the slope of the back plate Means and height adjustment means for adjusting the height of the seat and back are installed to provide convenience and comfort to the user, and in particular, the back tilting mechanism is widely used to provide comfort to modern people who sit on chairs for a long time. It is being used.

However, most of the tilting mechanisms used in the related art consist of a rotation structure by a combination of a lever, a gear, and a shaft, and the configuration is complicated, and it is difficult to downsize, and there is a problem in that operability and maintenance are deteriorated. .

In particular, the conventional tilting mechanism has a hassle of operating a separate lever again to return the back frame to its original position in such a way that the back frame is fixed at a predetermined position by utilizing the limited function. That is, the conventional tilting mechanism not only has to operate the lever for tilting, but also has to operate the lever again when returning, so there is a problem that the usability decreases.

In addition, the conventional tilting mechanism is capable of a free tilting function in which the backrest is tilted according to the user when the user tilts the backboard, but there is no function to limit the tilting angle of the backboard with a subdivided angle, so various angles desired by the user There were a number of problems, such as multi-stage tilting can not be made.

Patent Registration Publication No. 10-0791451 (2007.12.27) Utility model registration publication registration number 20-0315975 (2014.02.28) Patent registration publication registration number 10-1192254 (2012.10.11) Patent registration publication registration number 10-1034972 (2011.05.07)

The object of the present invention is a multi-stage contact distance between the limit multi-stage block and the limit shaft connected to the back frame by the linear motion of the limit multi-stage block according to the rotation operation of the limit lever, the tilting angle range of the back frame according to the user's convenience It is to provide a chair assembly having a multi-limit tilt function that can be freely adjusted in multiple stages and a chair having the same.

Another object of the present invention is to be connected to a chair assembly having a multi-limit tilt function with a simple structure of an elastic adjustment unit and a height adjustment unit, thereby improving assembly and productivity, and tilt, tilt strength and height for a back frame. It is to provide a chair assembly having a multi-limit tilt function that can be freely adjusted and a chair having the same.

The present invention is a tilt housing; A main shaft in which both ends are inserted into the tilt hole formed on the rear end side of the side of the tilt housing, and one side of the climbing frame is rotated around the main pivot; An elastic support unit installed in the tilt housing to elastically support the main shaft in a rear end direction; Includes; a tilt limit unit which is connected to the tilt housing and the main shaft so that the movement range of the main shaft in the tilt hole according to the elastic force of the elastic support is variable;

The tilt limit unit, a limit multi-stage block provided with a plurality of adjustment step surfaces is installed to move in a linear reciprocation in the left and right directions by rotation of the limit lever, and is connected to the main shaft so that the limit shaft moves in the front-rear direction. By the linear movement of the block, the contact distance (L) between the contact support of the limit shaft and the control step surface where the contact support is contacted is adjusted, and the tilting angle of the back frame is changed as the movement range of the main shaft in the tilt hole changes. The range is adjusted.

The present invention allows the user to limit the tilting angle of the back frame according to the physical condition or necessity by simple operation and operation of the elastic support portion and the tilt limit portion, thereby increasing the user's convenience. In particular, the present invention has the effect that the user's convenience is further improved because the tilting angle of the back frame is easily limited (variable) by the rotation of the limit lever.

According to the present invention, the tilting angle range of the back frame is adjusted as the contact distance between the plurality of adjustment step surfaces provided in the limit multi-stage block and the limit shaft contact support is changed by the linear movement of the limit multi-stage block by rotation of the limit lever. The structure is simple, and the assembly and operability are excellent, and there is an effect that maintenance can be easily performed.

In the present invention, when the tilting operation of the back frame, the plurality of adjustment step surfaces formed on the limit multi-stage block and the contact support of the limit shaft are in direct contact with each other, so that the fixing force of the back frame is improved, and the tilting range of the back frame Has the effect that can be reliably controlled.

In particular, the contact surface of the limit shaft of the limit multi-stage block and the contact shaft of the limit shaft is in surface contact, so that deformation due to load is minimized, thereby minimizing the use of aluminum or steel material, which greatly reduces the cost. have.

In the present invention, a ball stopper is further installed on the limit multi-stage block, and a stopper groove corresponding to the ball stopper is further formed in the tilt housing, and when the limit multi-stage block moves linearly by rotation of the limit lever, the ball stopper and the stopper groove The positioning of the limit multi-stage block is made clear by the combination, and the user can easily recognize the position of the limit multi-stage block, that is, the angle adjustment of the back frame, by the operation sound generated by the ball stopper, so that the overall operability It has the effect of being improved.

In the present invention, since the tilting angle range of the climbing frame is adjusted by the positioning of the limit multi-stage block, the user can conveniently set the tilting angle range of the climbing frame as well as easily tilting the climbing frame in various working environments. There are many effects such as manipulation.

1 is an exemplary view showing the configuration of a chair assembly according to the present invention
Figure 2 is an exemplary view showing an exploded configuration of a chair assembly according to the present invention
Figure 3 is an exemplary view showing the assembled state of the chair assembly according to the present invention
Figure 4 is a plan view showing the assembled state of the chair assembly according to the present invention
Figure 5 is an exemplary view showing the configuration of the lower housing according to the present invention
Figure 6 is an exemplary view showing the configuration of the elastic support portion and the tilt limit portion according to the present invention
7 is an exemplary view showing a coupling relationship between the tilt spring and the front / rear holder of the present invention
8 is an exemplary view showing a coupling relationship between a moving block and a nut block of the present invention
9 is an exemplary view showing a coupling relationship between the moving block and the ball stopper of the present invention
10 is an exemplary view showing the configuration of the elastic adjustment unit according to the present invention
11 is an exemplary view showing a coupling relationship between the elastic support portion and the elastic adjustment portion of the present invention
12 is another exemplary view showing a coupling relationship between the elastic support portion and the elastic adjustment portion of the present invention
Figure 13 is an exemplary view showing the overall configuration of a chair assembly according to the present invention
Figure 14 is an exemplary view showing an operating state for the chair assembly of the present invention
Figure 15 is an exemplary view showing a state of adjustment of the tilting range of the back frame according to the operation of the chair assembly of the present invention
16 is an exemplary view showing the overall configuration of a chair according to the present invention

In the present invention, a chair assembly having a multi-limit tilt function, a limit multi-stage block provided with a plurality of adjustment step faces is linearly reciprocated in a horizontal direction by rotation of the limit lever, thereby controlling a movement amount of the limit shaft. In accordance with convenience, the tilting angle range of the back frame is freely adjusted in multiple stages by the tilt limit unit, the tilting of the back frame is made within the specified tilt angle range, and when the force applied to the back frame is removed, the elastic force of the elastic support It is configured such that the back frame automatically returns to the original position (initial position).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, in order to help the understanding of the present invention, the part positioned in the front direction of the chair 800 in the state installed in the chair is set to the front end (or the front end direction, the front end side), and the part located in the rear direction of the chair 800 Is referred to as the rear end (or rear end direction, rear end side).

1 is an exemplary view showing a configuration of a chair assembly according to the present invention, FIG. 2 is an exemplary view showing an exploded configuration of a chair assembly according to the present invention, and FIG. 3 is an example showing an assembly state of a chair assembly according to the present invention. Figure 4, Figure 4 is a plan view showing the assembled state of the chair assembly according to the present invention, Figure 5 is an exemplary view showing the configuration of the lower housing according to the present invention, Figure 6 is an elastic support and tilt according to the present invention 7 is an exemplary view showing the configuration of the limit part, FIG. 7 is an exemplary view showing the coupling relationship between the tilt spring and the front / rear holder of the present invention, and FIG. 8 is an exemplary view showing the coupling relationship between the moving block and the nut block of the present invention. , FIG. 9 is an exemplary view showing a coupling relationship between a moving block and a ball stopper of the present invention, FIG. 10 is an exemplary view showing a configuration of an elastic adjustment part according to the present invention, and FIG. 11 is an elastic support part and an elastic adjustment part of the present invention Show bonding relationship Figure 12 is another exemplary view showing the coupling relationship between the elastic support portion and the elastic adjustment portion of the present invention, Figure 13 is an exemplary view showing the overall configuration of the chair assembly according to the present invention, Figure 14 is the present invention An exemplary view showing the operating state for the chair assembly of, Figure 15 shows an exemplary view showing a tilting range adjustment state of the back frame according to the operation of the chair assembly of the present invention,

The present invention is a tilt housing (100); A main shaft 400 in which both ends are inserted into a tilt hole formed on a rear end side of the side of the tilt housing 100, and one side of the climbing frame rotated around the main pivot is installed; An elastic support portion 300 installed in the tilt housing 100 to elastically support the main shaft 400 in the rear end direction; Includes; the tilt limit unit 200 is installed connected to the tilt housing 100 and the main shaft 400 so that the movement range of the main shaft 400 in the tilt hole according to the elastic force of the elastic support 300;

The tilt limit unit 200 is installed such that the limit multi-stage block provided with a plurality of adjustment step surfaces is linearly reciprocated in the left and right directions by the rotation of the limit lever, and the limit shaft is moved in the front-rear direction to the main shaft 400. Connected as much as possible,

By the linear movement of the limit multi-stage block, the contact distance (L) between the contact support of the limit shaft and the control step surface where the contact support is contacted is adjusted, so that the movement range of the main shaft 400 in the tilt hole is variable, that is, The tilting angle range of the back frame which is tilted while compressing the elastic support portion 300 is adjusted.

1 and 2, the tilt housing 100 is formed separately into upper and lower housings 110 and 120, and the upper housing 110 and the lower housing 120 are integrally formed by coupling means such as bolts. It is assembled and installed.

1 to 5, the lower housing 120 is formed with an inner space 120c in which the main shaft 400, the elastic support portion 300, and the tilt limit portion 200 are accommodated. On the rear end side of the side surfaces 120a and 120b, a pivot hole 122 in which the back frame 810 is connected by the main pivot 811 is formed, and the main shaft 400 is moved to be located below the pivot hole 122. The long hole type tilt hole 123 is formed in an arc shape around the pivot hole 122.

In addition, the lower housing 120 is formed with a lever hole 124 through which the limit lever of the tilt limit unit 200 is installed through the front side of the side surface 120a.

The main shaft 400 is installed so that both ends penetrate through the tilt hole 123 provided on the side surfaces 120a and 120b of the tilt housing 100, and the main pivot 811 is provided at both ends passing through the tilt housing 100. One side of the back frame 810 that is rotated (tilting operation) around the center is rotatably connected.

2 to 4 and 6, the elastic support part 300 is connected to the tip of the tilt spring 310 and the tilt spring 310 and is tilted by a spring pin 321 ( 100) a front end holder 320 supported by the rear end of the tilt spring 310, and a rear end holder 330 supporting the tilt spring and a rear end holder 330 rotatably connected to the middle shaft ( 340, the middle shaft 340, the front end is rotatably connected to the main shaft 400, the rear end is rotatably connected to the connection link 350 is installed, but the elastic support 300 is a middle shaft ( Using 340 as an upper vertex, the spring pin 321, the middle shaft 340, and the main shaft 400 are connected in a link structure to have a triangular shape.

In addition, the front end holder 320 and the rear end holder 330 are connected to enable flow in the front / rear direction by the holder arm 360. That is, the tilt spring is installed to be smoothly contracted / relaxed by the front / rear holder and the spring arm.

For example, as shown in FIG. 7, the holder arm 360 is inserted into the hollow of the front end holder 320 and the rear end holder 330, and the nut part provided at the end of the holder arm 360 in the hollow The bolt 361 is fastened, and the front / rear hole 320 and 330 are configured to be connected by the holder arm 360, and the tilt spring 310 can be supported by the line / rear holder and the holder arm configured as described above. have.

2 to 4, the elastic support 300 is paired within the inner space 120c of the tilt housing 100 so as to be connected to both sides of the main shaft 400 within the tilt housing 100. It can be installed, preferably, as shown in the drawing, the two tilt springs 310, the two tilt springs 310 and the front / rear holders 320 and 330 for supporting the tilt springs 310 and the respective tilt springs ( The rear end holder 330 installed in 310 is connected to both ends of one middle shaft 340, which is connected to both ends of the middle shaft 340 and the main shaft 400, two connecting links 350. It is configured to include, it can be configured to be uniformly transmitted to the main shaft 400 through the elastic force generated by the two tilt springs 310 through the middle shaft 340.

In addition, the elastic support part 300 is further provided with a rolling contact bearing 370 on the middle shaft 340, and the rolling contact bearing 370 is installed to be located on the outer circumference of the middle shaft 340, tilting. The direction in which the middle shaft 340 is moved in the rear end direction B by the elastic force of the spring 310, or the tilt spring 310 is compressed by the tilting operation of the back frame 810 (tip direction, F) As the middle shaft 340 is moved, it is in rolling contact with the upper housing 110 of the tilt housing 100, so that the elastic force of the tilt spring 310 is smoothly transmitted to the main shaft 400. .

The elastic support portion 300 configured as described above, since the tip of the tilt spring 310 is supported by the tilt housing 100 by the tip holder 320, the elastic force of the tilt spring 310 is through the rear holder 330 The elastic force transmitted to the middle shaft 340 and transmitted to the middle shaft 340 is transmitted to the main shaft 400 through the connection link 350, so that the main shaft 400 along the tilt hole 123 is in the rear end direction. It is elastically supported to be moved to (B). That is, when the main shaft 400 is not applied to the back frame 810 in the rear end direction B, the main shaft 400 is brought into contact with the rear end end point 123a of the tilt hole by the elastic force of the elastic support part 300, , By the position of the main shaft 400, the main pivot 811 and the back frame 810 connected to the main shaft 400 maintain the initial position (standing state) or automatically return to the initial position.

The tilt limit unit 200, as shown in Figures 2 to 4 and 6, the limit lever 210 is installed to be rotatable through the front end side of one side of the tilt housing 100; A nut block 220 coupled to the screw portion 211 of the limit lever 210 located in the tilt housing 100; It is integrally coupled with the nut block 220, and is installed to be linearly moved in the left and right direction (width direction) within the tilt housing 100, and is provided with a plurality of adjustment step faces 231 toward the rear end direction B Limit multi-stage block 230; A limit link 240 whose rear end is rotatably connected to the main shaft 400; It includes; a limit shaft 250 which is hinged to the rear end by the limit link 240 and is installed so that the front end faces the limit multi-stage block 230 and is moved in the front / rear direction in the tilt housing 100.

2 and 6, the limit lever 210 is integrally connected to the lever unit 212 and the lever unit 212, which is rotatably supported by the tilt housing 100, and the tilt housing 100 ), The end is connected to be rotatable on one side in the inner space 120c of the tilt housing 100 and includes a screw portion 211 formed with a thread on the outer surface.

The nut block 220 is moved in the left-right direction (width direction) along the screw portion 211 of the limit lever, as shown in FIGS. 2, 6, and 8, and the lower side is the limit multi-stage block 230 ) Is integrally installed. At this time, the nut block 220 and the limit multi-stage block 230 may be integrally connected by a bolt / nut method or a male / female fitting method.

The limit multi-stage block 230, as shown in Figures 2, 6 and 8, the nut block 220 is coupled to one end of the moving block 232 and the moving block 232 integrally formed Although it includes a step block 233, the step block 233 has a plurality of adjustment step surfaces 231 having steps in the rear step direction B. That is, when the step block 233 is installed in the tilt housing 100 and viewed with reference to a plane, a plurality of adjustment step faces 231 may be formed with a step in a step or irregular type.

When the tilting operation of the back frame 810, the adjustment step surface 231 is in contact with the limit shaft 250 of the tilt limit unit 200, so that the position of the back frame 810 is fixed, or the limit shaft 250 ) Through the limitation of the moving distance, the tilting range of the back frame 810 is provided.

As shown in FIG. 8, the limit multi-stage block 230 shown in the drawings of the present invention includes four adjustment step surfaces, that is, first, second, third, and fourth adjustment step surfaces 231a, 231b, 231c, and 231d. It is shown to be provided, but is not limited thereto, and may be formed to have two or three or more adjustment step surfaces.

In addition, in the tilt housing 100, that is, the lower housing 120, as shown in Figure 5, the limit multi-stage block 230, that is, the left and right direction (width direction) linear reciprocating movement of the moving block 232 is smooth The slide surface 125 and the guide groove 126 are formed so as to be made, and the moving block 232 contacts the slide surface 125 through the guide groove 126 and moves the nut block 220 to be linearly moved. And is connected.

The slide surface 125 is formed such that the moving block 232 of the limit multi-stage block 230 slides in the left and right directions (width direction) on the bottom surface of the inner space of the lower housing 120, and the guide groove 126 ) May be formed on the lower housing 120 between the slide surface 125 and the nut block 220 or on both left and right ends of the slide surface 125.

As an example, the first and second central supports 127 and 128 are spaced apart from each other so as to cross the inner space 120c of the lower housing in the line / rear direction, and on the front end side of the first and second central supports 127 and 128. The guide hole 126 through which the moving block of the limit multi-stage block is inserted is formed through, and the slide surface 125 is provided on the bottom surface of the inner space so as to be connected to the guide hole 126 between the first and second central supports 127,128. It can be configured to be formed.

When the first and second central supports 127 and 128 are formed / installed in the lower housing 120 as described above, the tilt spring 310 of the elastic support unit 300 has the side surfaces 120a, 120b and the first and second sides of the lower housing 120. It can be installed to be located in the space between the central supports. At this time, the spring pin 321 installed to support the upper holder 320 connected to the tilt spring may be installed to be supported by the side surfaces 120a and 120b of the tilt housing and the first and second central supports 127 and 128. .

In addition, the limit multi-stage block 230, as shown in Figures 8 and 9, the ball stopper 234 is further installed to vertically pass through the moving block 232, the inner space of the tilt housing 100 A plurality of stopper grooves 129 to which the ball stopper 234 is coupled may be formed on the bottom surface or the slide surface 125.

The ball stopper 234 is a ball 234a inserted into the vertical hole 232b so as to protrude from the lower surface 232a of the moving block, and a ball spring elastically supporting the ball 234a in the direction of the lower surface of the moving block ( 234b) and a screw hole in the vertical hole 232b may be configured to include a tanned bolt 234c that adjusts the elastic force of the ball spring 234b.

At this time, the vertical hole 232b is formed so that the lower diameter communicating with the lower surface 232a is smaller than the diameter of the ball, so that a part of the ball protrudes from the lower surface 232a.

A plurality of stopper grooves 129 are formed to correspond to the adjustment step surface 231 of the limit multi-stage block.

Ball stopper 234 configured as described above, when the limit multi-stage block 230 is linearly moved by the rotation of the limit lever 210, any of the plurality of adjustment step surface provided in the limit multi-stage block 230, any When the adjustment step surface is located in a straight line in the line / rear direction with the limit shaft 250, the ball 234a is inserted into an arbitrary stopper groove among the plurality of stopper grooves by the elastic force of the ball spring 234b, The position of the limit multi-stage block 230 is fixed so that the position of the adjustment step surface is set, and at the same time, an operation sound is provided according to insertion / release into the stopper groove, so that the user can easily set the position.

In addition, as shown in FIGS. 4 and 9, the lower housing 120 supports the moving block upper surface 232c of the limit multi-stage block to assist linear movement of the limit multi-stage block, and the limit multi-stage block 230 is provided. A guide support 121 for preventing departure from the upward direction may be further installed.

The guide support 121 is fixedly installed in the lower housing 120 by a screw screw or the like so that the upper surface 232c of the movable block of the limit multi-stage block is slidable or installed in close proximity. At this time, the guide support 121 may be a synthetic resin or a metal pad or washer.

When the guide groove 121, the slide surface 125, and the guide support 121 are provided on the lower housing as in the above, the linear reciprocating motion of the limit multi-stage block 230 by the rotation operation on the limit lever 210 This will be done more smoothly.

2 and 6, the rear end is rotatably connected to the main shaft 400, and the front end is hinged 241 to the limit shaft 250. That is, the limit link 240 links the main shaft 400 and the limit shaft 250.

As shown in FIG. 2, the limit shaft 250 includes a shaft body 251 hinged to the limit link 240 and a contact support 252 integrally formed at the front end of the shaft body 251. Includes.

The contact support 252 is in contact with the adjustment step surface 231 of the limit multi-stage block when the limit shaft 250 is moved in the front end direction F by the tilting operation of the back frame 810. At this time, the contact support 252 is preferably formed to be in surface contact with the adjustment step surface 231.

The limit shaft 250 is installed such that the contact support 252 is in contact with the control step surface of the limit multi-stage block or is orthogonal to the main shaft 400 by the limit link 240 so that the free end state is maintained.

In addition, the limit shaft 250 is preferably installed to be located in the middle of the inner space of the lower housing. For example, as shown in FIG. 4, the limit shaft 250 may be installed to be positioned between the first and second central supports 127 and 128.

At this time, the limit shaft 250 is to be supported by the front / rear end side of the shaft body 251 by the guide bush 130 and the shaft bush 140 so that linear motion in the line / rear direction is constant. .

That is, the limit shaft 250 is supported so that the front end portion of the shaft body 251 is in point or surface contact by the guide bush 130, and the rear end portion is supported by the shaft bush 140. At this time, the guide bush 130 is installed to be supported in contact with the upper / lower two or two sides of the shaft body 251, or in three or three sides in a triangular shape.

The shaft bush 140 is between the limit link 240 and the guide bush 130, the lower side of the shaft body 251 is supported in contact with the lower housing 120 so that the limit shaft 250 is smoothly moved in a straight line. It may be installed separately and may be injection molded integrally with the lower housing 120.

The guide bush 130 is formed to support the limit shaft through surface contact or line contact with the outer surface of the shaft body 251 of the limit shaft, and the guide bush 130 is formed or installed in the tilt housing, or described later. It can be formed or installed in the tension roller cover of the elastic adjustment portion. In the drawings of the present invention, since a configuration in which the guide bush is integrally formed in the tension roller cover of the elastic adjustment part is illustrated, the configuration and operation of the guide bush will be described later.

The tilt limit unit 200 configured as described above has a hinge 241 to which the main shaft and the limit link are connected as a lower vertex, a contact support 252 of the limit shaft, and a hinge 241 to which the limit link is connected, the main The shaft 400 is connected in a link structure to have an inverted triangle shape.

In addition, the chair assembly 700 having a multi-limit tilt function of the present invention, as shown in Figures 10 to 13, the elastic adjustment unit 500 for adjusting the elastic force of the elastic support 300 may be further installed have.

The elastic adjustment part 500 is a tension roller cover 510 fixedly installed in the tilt housing 100, a tension roller block 520 installed to be located in the tension roller cover 510, and a tension roller cover 510 A gearbox 530 spaced a predetermined distance from the fixed housing and installed at the tip end of the inner space of the tilt housing, and a tension gear having one side supported by the tension roller cover 510 and rotatably connected to the tip side of the gear box 530 The nut 540, the tension gear nut 540 and the front end are screwed and the tension roller screw 550 is penetrated through the tension roller cover 510 and the rear end is hinged to the tension roller block 520, and the tilt housing ( It may be configured to include an elastic force adjustment lever 560 that is installed so that the end is connected to the gear box 530 through the side surface 120b of 100).

At this time, the elastic force adjustment lever 560 and the tension gear nut 540 are connected by a bevel gear (not shown) in the gear box 530, and the tension roller block 520 is an inclined inner surface of the tension roller cover An inclined curved surface 521 in contact with 511 is formed on the outer surface.

At this time, the tension roller block 520 is installed in the tension roller cover 510 so as to be positioned above the middle shaft 340 of the elastic support unit 300, the elastic support unit (522) on the lower surface 522 of the tension roller block 520 The rolling contact bearing 370 of 300) is brought into contact support.

In the elastic adjustment unit 500 configured as described above, the rotational operating force of the elastic force adjustment lever 560 is transmitted to the tension gear nut 540 through the gear box 530, and is tensioned by rotation of the tension gear nut 540. The tension roller block 520 hingedly connected to the gear screw 550 is linearly moved in the line / rear direction in the tension roller cover 510.

At this time, the tension roller cover 510 is fixedly installed on the lower housing 120 of the tilt housing 100, the inclined inner surface 511 of the tension roller cover and the inclined curved surface 521 of the tension roller block are in contact, The tension roller block 520 is linearly moved in the line / rear direction within the tension roller cover 510, and thus the height is changed in the vertical direction.

As such, when the height of the tension roller block 520 is changed, the height position of the rolling contact bearing 370 contacted and supported by the tension roller block 520 is changed, whereby the position of the middle shaft 340 is the height position. Is changed, and eventually, the elastic operating range of the tilt spring 310 is adjusted, so that the elastic force of the elastic support portion 300 is controlled.

In addition, when the elastic adjustment unit 500 is installed in this way, as shown in FIGS. 10 to 12, the guide bush 130 supporting the limit shaft 250 of the tilt limit unit 200 is a tension roller cover. It may be integrally injection-molded under the tip of the (510).

That is, the front end portion of the limit shaft is supported in contact with the guide bush 130 integrally injection molded to the lower end of the tension roller cover 510, and the rear end portion of the limit shaft 250 is installed in the lower housing shaft bush 140 ), When the main shaft 400 is rotated along the tilt hole 123 around the main pivot 811 in the direction in which the tilt spring 310 is compressed, the main shaft 400 When the rotational movement force is transmitted by the limit link 240, the limit shaft 250 performs linear motion in the line / rear direction. At this time, since the limit shaft 250 is supported by the guide bush 130 and the shaft bush 140, linear motion of the limit shaft 250 is smoothly performed, and the linear motion of the limit shaft 250 is performed. By this, the contact support 252 of the limit shaft 250 is brought into constant contact with the one-side adjustment step surface 231 of the limit multi-stage block.

In addition, the elastic adjustment unit 500 may be installed between two tilt springs 310 provided in the elastic support unit 300 to be located in the middle of the inner space 120c of the lower housing. For example, as shown in FIG. 13, the elastic adjustment part 500 may be installed to be positioned between the first and second central supports 127 and 128, that is, positioned above the limit shaft 250.

The elastic adjustment unit 500 is not necessarily limited to the configuration thereof, and the elastic adjustment unit of known or another configuration configured to adjust the height position of the middle shaft 340 in which the rolling contact bearing 370 is installed ( 500) may be installed.

In addition, the chair assembly 700 with a multi-limit tilt function of the present invention may further be provided with a height adjustment unit 600 for adjusting the height of the chair.

13, the height adjustment unit 600, as shown in Figure 13, the operating force of the height adjustment lever 610 is transmitted to the push block 630 through the connecting rod 620, the rotation operation of the push block 630 The gas cylinder 830 is operated by the tilting angle adjustment device 700, the seat plate frame 820 and the back frame 810 may be configured to be raised and lowered. Since the configuration of the height adjustment unit 600 is a known configuration, detailed description thereof will be omitted.

In addition, the height adjustment lever 610 of the height adjustment unit 600 may be configured to have a coupling relationship between the elastic force adjustment lever 560 of the elastic adjustment unit 500 and the double tube structure, and the combination of the double tube structure Since the relationship is a known technique, detailed description thereof will be omitted.

The chair assembly 700 with the multi-limit tilt function of the present invention configured as described above is connected to the seat frame 820 and the back frame 810 of the chair 800, as shown in FIG. Cylinder 830 may be installed to be connected.

Or less, according to the present invention, the first, second, third, fourth control step surface (231a, 231b, 231c, 231d) based on the limit multi-stage block 230 provided with the action of the tilting angle range limit of the back frame Describe the state.

Figure 14 shows an exemplary view showing the operating state for the chair assembly of the present invention, Figure 14 (a) shows the state before the operation of the limit lever of the tilt limit unit 200, the contact support of the limit shaft (252) is supported in contact with the first adjustment step surface 231a of the limit multi-stage block, and the main shaft 400 is supported in contact with the rear end end point 123a of the tilt hole by the elastic force of the elastic support portion 300, limit Since the shaft 250 and the main shaft 400 are connected by the limit link 240, the back frame 810 is not tilted and remains fixed.

14 (b) shows a state in which the nut block and the limit multi-stage block are moved by the operation of the limit lever, and in a state in which no force is applied to the back frame, the fourth adjustment step surface 231d of the limit multi-stage block ) When the limit multi-stage block 230 is linearly moved within the tilt housing 100 by the rotation operation of the limit lever 210 so that it is located in line with the contact support 252 of the limit shaft, the fourth of the limit multi-stage block A contact distance (L, gap) is generated between the adjustment step surface 231d and the contact support 252 of the limit shaft.

At this time, when a state in which no force is applied to the back frame is maintained, the state in which the main shaft 400 is brought into contact with the rear end end point 123a of the tilt hole by the elastic support part 300 is maintained, so that the limit multi-stage block is made. 4 The contact distance (L, clearance) between the adjustment step surface 231d and the contact support 252 of the limit shaft is kept constant.

As described above, when a contact distance (L, gap) is generated between the fourth adjustment step surface of the limit multi-stage block and the contact support of the limit shaft, when a force for tilting is applied to the back frame 810, the main pivot is applied. The back frame 810 is rotated around (811), and the main shaft 400 connected to the back frame is rotated along the tilt hole 123 by the rotation of the back frame, and the main shaft 400 ), The limit shaft is moved in the tip direction.

At this time, the limit shaft 250, as shown in Fig. 14 (c), since the contact support 252 can be moved to the fourth control step surface 231d of the limit multi-stage block until the contact support, The tilting operation of the back frame 810 is made within the contact distance (L, gap) range.

In addition, the limit multi-stage by the rotation operation of the limit lever 210 so that the second adjustment step surface 231b or the third adjustment step surface 231c of the limit multi-stage block is in line with the contact support 252 of the limit shaft. When the block 230 is linearly moved within the tilt housing 100, the contact distance L according to the second and second control stepped surfaces 231b and 231c of the limit multi-stage block contacting the contact support 252 of the limit shaft Since the gap is changed, as shown in FIG. 15, the tilting operation range of the back frame 810 is changed.

That is, FIG. 15 (a) is a back frame frame state in which the contact support 252 of the limit shaft is in contact with the first adjustment step surface 231a (one step limit state), and (b) is the second adjustment step surface ( The tilting angle of the back frame in the state where the contact support 252 of the limit shaft is contacted with 231b) (two-stage limit state), (c) is the contact support of the limit shaft 252 on the third adjustment step surface 231c Tilting of the back frame tilt angle in the state where) is in contact support (three-stage limit state), (d) tilting of the back frame in the state where the contact support 252 of the limit shaft is in contact with the fourth adjustment step surface 231d The angle change state (four-stage limit state) is shown.

As described above, according to the present invention, the limit multi-step block is linearly moved in the left-right direction (width direction) by the rotation operation of the limit lever, so that the contact distance (L) between the contact support 252 of the limit shaft and the plurality of adjustment step surfaces ) Is adjusted step by step, so that the movement range within the tilt hole of the main shaft 400 is variable, so that the tilting range of the climbing frame is limited (adjusted).

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be implemented by any person skilled in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, such changes are within the scope of the claims.

(100): Tilt housing (110): Upper housing
(120): lower housing (120a, 120b): side
(120c): interior space (121): guide support
(122): Pivot hole (123): Tilt hole
(123a): trailing end point (124): lever hole
(125): Slide surface (126): Guide groove
(127): First central support (128): Second central support
(129): Stopper groove (130): Guide bush
(140): Shaft bush (200): Tilt limit part
(210): Limit lever (211): Screw
(212): Lever part (220): Nut block
(230): Limit multi-stage block (231): Adjustable step surface
(232): Moving block (232a): When
(232b): Vertical hole (232c): Top surface
(233): Step block (234): Ball stopper
(234a): Ball (234b): Ball spring
(234c): Tan bolt (240): Limit link
250: limit shaft 251: shaft body
(252): contact support (300): elastic support
(310): Tilt spring (320): Tip holder
(321): Spring pin (330): Rear holder
(340): Middle shaft (350): Link
(360): Holder arm (361): Bolt
(370): rolling contact bearing (400): main shaft
(500): Elasticity adjustment part (510): Tension roller cover
(511): Inclined inner surface (520): Tension roller block
(521): Inclined surface (522): Bottom
(530): Gear box (540): Tension gear nut
(550): Tension gear screw (560): Elastic force adjustment lever
(600): Height adjustment unit (700): Chair assembly
(800): Chair (810): Back frame
(811): Main pivot (820): Seat frame
(830): Gas cylinder

Claims (15)

Tilt housing 100; A main shaft 400 in which both ends are inserted into the tilt hole formed on the rear end side of the side of the tilt housing 100, and one side of the climbing frame is rotated around the main pivot; An elastic support portion 300 installed in the tilt housing 100 to elastically support the main shaft 400 in the rear end direction; Includes; the tilt limit unit 200 is installed connected to the tilt housing 100 and the main shaft 400 so that the movement range of the main shaft 400 in the tilt hole according to the elastic force of the elastic support 300;
The tilt limit unit 200,
A limit lever 210 installed to be rotatable through a tip end side of one side of the tilt housing 100;
A nut block 220 coupled to the screw portion 211 of the limit lever 210 located in the tilt housing 100;
It is integrally coupled with the nut block 220, and is installed to be linearly moved in the left and right direction (width direction) within the tilt housing 100, and is provided with a plurality of adjustment step faces 231 toward the rear end direction B Limit multi-stage block 230;
A limit link 240 whose rear end is rotatably connected to the main shaft 400;
Including the limit shaft 250 which is hinged to the rear end by the limit link 240 and is installed so that the front end faces the limit multi-stage block 230 and is moved in the front / rear direction within the tilt housing 100;
The limit multi-stage block is installed to move linearly in the left and right directions by the rotation of the limit lever, and the limit shaft is connected to the main shaft, and by the linear movement of the limit multi-stage block, the contact support of the limit shaft and the limit multi-stage block adjustment stage The chair assembly with a multi-limit tilt function is characterized in that the contact distance (L) between the vehicle surfaces is adjusted and the tilting angle range of the back frame is adjusted in multiple stages by changing the movement range of the main shaft 400 in the tilt hole.
The method according to claim 1;
The elastic support part 300 is connected to the tip of the tilt spring 310, the tilt spring 310, and the tip holder 320 supported by the spring housing 321 and supported by the tilt housing 100, and the tilt spring ( It is connected to the rear end of 310), the rear end holder 330 supporting the tilt spring, the middle shaft 340 installed to be connected to the rear end holder 330 to be rotatable, and the front end of the middle shaft 340 to be rotatable Includes a connection link 350 that is connected to the main shaft 400 is rotatably connected to the rear end, the elastic support portion 300 is a spring pin 321 and the middle shaft 340 and the main shaft 400 Chair assembly with a multi-limit tilt function, characterized in that installed to have a triangular shape.
The method according to claim 2;
The tip holder 320 and the rear end holder 330 are inserted into the holder arm 360 into the hollow of the front end holder 320 and the rear end holder 330, and a nut provided at the end of the holder arm 360 in the hollow The bolt 361 is fastened to the part, the chair assembly with a multi-limit tilt function, characterized in that the front / rear end holes (320,330) are configured to be connected by the holder arm (360).
delete The method according to claim 1;
The limit multi-stage block 230 includes a moving block 232 to which the nut block 220 is coupled to one end, and a step block 233 integrally formed with the moving block 232, but the step block 233 Chair assembly with a multi-limit tilt function, characterized in that a plurality of adjustment step surface 231 having a step in the rear end direction (B) is formed.
The method according to claim 5;
A plurality of adjustment step surface 231 is a staircase or a concave-convex type with a step difference, characterized in that the chair assembly with a multi-limit tilt function.
The method according to claim 1;
The tilt housing 100 is formed separately from the upper housing 110 and the lower housing 120, and in the lower housing 120, the left-right direction (width direction) linear reciprocating movement of the limit multi-stage block 230 is smooth. Chair assembly with a multi-limit tilt function characterized in that the slide surface 125 or the guide groove 126 or the slide surface 125 and the guide groove 126 are formed to be made.
The method according to claim 1 or claim 5;
In the limit multi-stage block 230, a ball stopper 234 is further installed, and a plurality of stopper grooves 129 to which the ball stopper 234 is coupled are formed in the tilt housing 100,
The ball stopper 234 is a ball 234a inserted into the vertical hole 232b, a ball spring 234b elastically supporting the ball 234a in a downward direction, and a ball screwed into the vertical hole 232b Chair assembly with a multi-limit tilt function, characterized in that it comprises a tan bolt (234c) for adjusting the elastic force of the spring (234b).
The method according to claim 1;
The tilt housing 100 is formed separately from the upper housing 110 and the lower housing 120, and the lower housing 120 prevents the limit multi-stage block 230 from being displaced upward and the limit multi-stage block. Chair assembly with a multi-limit tilt function, characterized in that the guide support 121 is further installed to guide the linear movement of the.
The method according to claim 1;
The limit shaft 250 includes a shaft body 251 hinged to the limit link 240 and a contact support 252 integrally formed at the front end of the shaft body 251,
The shaft body 251 is a multi-limit tilt function characterized in that the front / rear side is supported by the guide bush 130 and the shaft bush 140 so that linear movement in the line / rear direction is constant. Chair assembly with a.
The method according to claim 1;
The chair assembly 700 having a multi-limit tilt function is further provided with an elastic adjustment part 500 for adjusting the elastic force of the elastic support part 300,
The elastic adjustment unit 500, the tension roller cover 510 is fixedly installed in the tilt housing 100, the tension roller block 520 is installed to be located in the tension roller cover 510, and the tension roller cover (510) ) Is spaced a predetermined distance from the gearbox 530 fixedly installed on the tip end of the inner space of the tilt housing, and one side supported by the tension roller cover 510 and the tip end rotatably connected to the gear box 530 The gear nut 540, the tension gear nut 540 and the front end are screwed and the tension roller screw 550 is penetrated through the tension roller cover 510 and the rear end is hinged to the tension roller block 520, and the tilt housing Chair assembly with a multi-limit tilt function, characterized in that it comprises an elastic force adjustment lever (560) that is installed so that the end is connected to the gear box (530) through the side (120b) of (100).
The method according to claim 11;
The tension roller cover 510 has an inclined inner surface 511 formed therein, and a guide bush 130 supporting the limit shaft 250 of the tilt limit part 200 is integrally injection-molded at the lower end thereof.
The tension roller block 520 is a chair assembly with a multi-limit tilt function, characterized in that the inclined curved surface 521 in contact with the inclined inner surface 511 of the tension roller cover is formed on the outer surface.
delete delete A chair characterized in that the chair assembly according to any one of claims 1,2,3,5,6,7,9,10,11,12 is mounted.

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