CN210810085U - Angle adjusting and positioning mechanism for chair back - Google Patents

Abstract

The utility model discloses a chair back angle adjusting and positioning mechanism, which comprises a base, a chair seat, a chair back and an adjusting and locking unit, wherein the base is provided with a positioning pipe which is sleeved with a sleeving groove, the chair back is arranged at the rear of a base frame, the lower part of the chair back is pivoted with the rear of the chair seat, and the side part of the chair back is pivoted with the base frame; the adjusting and locking unit is provided with a movable rod, a control button, a control cable and a locking device, wherein the movable rod is arranged in the sleeving groove, and a plurality of first convex teeth which are continuously arranged along the axial direction are arranged on the outer side of the movable rod; the front end of the movable rod is pivoted with the front part of the chair seat; the control button is arranged on the base frame; one end of the control cable is connected with the control button; the locking device mainly comprises a locking block and an elastic member, wherein one side of the locking block is provided with a second convex tooth capable of being engaged with the first convex tooth, and the locking block is linked and combined with the control cable; the elastic member provides an engaging elastic force for the first and second teeth; therefore, the utility model can be controlled to be locked or unlocked by the control button, and has the effects of convenient and stable adjustment and positioning of the angle of the chair back.

Description

Seat back angle adjustment and positioning mechanism

technical field

The utility model relates to a seat back angle adjustment and positioning mechanism, in particular to a seat back angle adjustment and positioning mechanism.

Background technique

The existing leisure chairs with adjustable sitting and reclining are generally provided with a rod body on the base, and a locking mechanism that can be displaced and actuated on the rod body is sleeved on the rod body, and the locking mechanism is engaged with the seat, so that the displacement of the seat can be adjusted. The locking mechanism can be displaced along the rod body correspondingly, and then the locking mechanism is fixed with the rod body to locate the seat position after it is displaced to the set position, and the seat back is generally linked with the seat back when the seat is displaced, so that the general ride can be adjusted. Angle or reclining angle to use.

However, most of the existing locking mechanisms are fixed by the knob tightening the rod body, but the tightening method is inconvenient to operate and the positioning is not sure and missing when it is not tightened, and the adjustment process of the loosening knob is because the seat back with a reclining angle is in a loose state, and it is easy to As a result, the seat back is greatly reclined to the maximum angle due to its gravity, resulting in inconvenient adjustment of the angle.

In order to improve the above-mentioned deficiencies, the locking device in the case of US7735925 mainly has a clamping seat, a positioning block, an adjusting rod, and a combination mechanism. The sleeve hole of the seat rod body is sleeved, and there are first and second seat bodies that can be relatively unfolded and clamped; the positioning block is arranged on the clamping seat, and the adjustment rod is assembled on one side of the positioning block by a combination mechanism. It also has a positioning part engaged with the positioning block, so that the adjusting rod can be pivoted to expand the first and second clamping bodies, and the seat can drive the clamping base to slide on the rod body, and at the same time change the tilt angle of the back of the chair. When moving to the set position, the adjusting rod can be pivoted so that the first and second seat bodies can clamp the rod body, lock the position of the clamp seat and the seat seat, and can locate the tilt angle of the back of the seat.

The aforesaid structure can make the first and second seat bodies unfold by pivoting the adjusting rod, or the clamping rod body can be frictionally locked, which has the effect of easy operation, but may cause frictional force when the clamping position is worn or oily. Insufficient results in the situation that the clamping and locking are not firm, and when the seat and the clamping seat are displaced, the adjustment rod also moves correspondingly, so that the user's hand cannot control the adjustment rod according to the habitual position. In the posture, the occupant may have to get up with his hands to hold the adjustment lever that moves to the front for adjustment, which is relatively inconvenient to adjust.

Utility model content

The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a structure that can lock the seat position and adjust and position the angle of the seat back, and has better operation convenience and locking stability.

According to an aspect of the present invention, a seat back angle adjustment and positioning mechanism is provided, comprising:

A base, which can be grounded, has a base frame, the base frame has a positioning pipe protruding toward the front, the positioning pipe has a socket groove, an opening in the front, and a through-connecting sleeve is arranged on the side wall of the positioning pipe The first through hole of the connecting groove;

a seat, located in the center of the base frame;

a seat back, arranged behind the base frame, the lower part is pivotally connected to the rear of the seat, and the side is pivotally connected to the base frame;

An adjustment locking unit with a movable rod, a control button, a control cable, and a locking device. The movable rod is set in the socket groove and can be axially extended and retracted. The outer side corresponds to the position of the first through hole. The front end of the movable rod is pivotally connected to the front of the seat; the two ends of the control rigging, one end of which is connected with the control button; and the locking device mainly has a locking block, an elastic The locking block is set at the position of the first through hole of the positioning block, and has a second protruding tooth on one side that can engage with the first protruding tooth, and the locking block is linked and combined with the other end of the control cable; and the elastic The element provides the engaging elastic force of the first and second protruding teeth to lock the movable rod, and the displacement of the locking block can be controlled by the control button to make the first and second protruding teeth disengage the non-locking movable rod.

Preferably, it further includes a bushing with shock absorption properties compared to metal, the bushing is fixed at the front end of the socket groove and cannot be rotated corresponding to the socket groove, and a central hole corresponding to the axial direction of the socket groove is provided. A concave part is arranged on one side of the perforation, and a second through hole on one side of the locking block is arranged at the position of the concave part of the perforation corresponding to the first through hole of the socket groove; and a convex part is arranged on the movable rod corresponding to the concave part of the bushing, and The movable rod can be inserted through the through hole of the bushing without rotating corresponding to the bushing, and the first protruding teeth are arranged on the protruding portion.

Preferably, a guide wheel having a diameter larger than that of the movable rod and rotatable along the inner wall of the socket groove is arranged behind the movable rod.

Preferably, the base frame has at least one side frame portion, at least one second pivot portion is arranged above the side frame portion, and the control button is arranged on the side of the base frame and has a hook portion, which is opposite to the hook portion. One side of the part has a ninth pivot part which can be pivotally connected with the second pivot part of the base frame.

Preferably, a first pivoting portion is provided on the side wall of the positioning tube near the first through hole; and the locking device further includes a pivoting block, and the pivoting block can pivot with the first pivoting portion of the positioning tube The tenth pivot part is connected, and an upper plate part and a side plate part are respectively arranged above and on the side of the tenth pivot part, and the upper plate part is combined with the other end of the control cable; The blocks are assembled, and a slot hole through which the control cable can be inserted is arranged in the center of the locking block, and the other end of the control cable is combined with the upper plate portion through the slot hole.

Preferably, the elastic member is disposed between the upper plate portion of the pivot block and the locking block, and can provide the pivot block's operating elasticity.

Preferably, the elastic member is a telescopic spring, and its two ends are respectively abutted against the inner side of the upper plate portion and the top surface of the locking block.

Preferably, a joint piece is arranged below the first pivot portion, and the joint piece can be inserted through the sleeve hole of the control cable.

Preferably, the base further comprises a base and a support, the base can be grounded, and the support is vertically arranged above the base; and the base is erected above the support, and has a cross-frame part on two sides of the cross-frame part One side frame portion is respectively arranged upward, and the positioning pipe is arranged in the center of the horizontal frame portion and is arranged obliquely toward the front and upward.

Preferably, a third pivoting portion is arranged on the rear side of the side frame portion of the base frame; and a fourth pivoting portion is arranged in the front center of the seat, and at least a fifth pivoting portion is arranged at the rear, and the bottom of the seat back is provided with a fourth pivoting portion. At least one sixth pivot portion pivotally connected to the fifth pivot portion of the seat is provided, and seventh pivot portions pivotally connected to the third pivot portion of the base frame are provided on both sides; and the front end of the movable rod has an eighth pivot portion. The pivoting portion is pivotally connected with the fourth pivoting portion of the seat.

Any of the above-mentioned technical solutions at least have the following beneficial effects:

In this technical solution, when the control button is not hooked, the locking block can be caused by the elastic force of the elastic member to engage the second protruding teeth with the first protruding teeth of the movable rod, which can locate the seat position and the tilt angle of the back of the chair, and also want to change the back of the chair. When the angle is tilted, the hand can hook the control button to drive the control cable and the pivot block and the locking block of the locking device to displace, so that the second protruding teeth of the locking block can be separated from the first protruding teeth. At this time, the user can tilt the back of the chair To an appropriate angle, the seat can drive the movable rod to move forward correspondingly. The better shock-absorbing bushing is sleeved with the movable rod and the guide wheel of the movable rod is rolled in the socket groove, which can improve the stability of the movement and the mute effect. After adjustment, release the control button, the second protruding teeth can be engaged with the first protruding teeth at the corresponding position by the elastic force of the elastic element, and the seat position and the back tilt angle of the chair can be positioned.

The technical solution can be locked or unlocked by pulling the control button, which is easy to operate, and the technical solution is positioned by the meshing of the first and second protruding teeth, which can have better positioning stability than the existing clamping method. The control button of the solution is located in a fixed position, which can be used in accordance with the operating habits for better convenience.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the utility model is further described;

Fig. 1 is the combination diagram of the utility model embodiment;

2 is a partially exploded view of an embodiment of the present utility model;

3 is a side view of an embodiment of the present invention;

4 is a partial cross-sectional view of an embodiment of the present invention, showing a locked state;

FIG. 5 is a schematic diagram of adjusting the seatback angle by the action of the control button according to the embodiment of the present invention;

6 is a partial cross-sectional view of an embodiment of the present invention, showing an unlocked state;

7 is a partial cross-sectional view of an embodiment of the present invention, showing a locked state after adjusting the angle of the seat back.

Detailed ways

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Understand each technical feature and overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

In the description of the present utility model, it should be understood that the orientation descriptions related to orientations, such as up, down, front, rear, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings, only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

1-4, this embodiment includes a base 1, a seat 2, a seat back 3, and an adjustment locking unit 4, the base 1 has a base 11, a support 12, and a base frame 13, The base 1 can be grounded, and the support column 12 is vertically arranged above the base 11 ; the base frame 13 is arranged above the support column 12 and can be pivoted corresponding to the support column 12 , and has a horizontal frame portion 14 , which has two sides of the horizontal frame portion 14 . The side frame portion 15 is provided upward.

An oblique positioning tube 16 is disposed in the center of the horizontal frame portion 14 toward the front and upward. The positioning tube 16 has a socket groove 161 in the center, an opening 160 is formed in the front of the socket groove 161, and a first pivot is disposed on the front side wall. The connecting portion 162 is provided with a first through hole 163 on one side of the first pivoting portion 162 that communicates with the socket groove 161 , and an engaging piece 164 is arranged below the first pivoting portion 162 , and the engaging piece 164 has a set of holes 165 , and a bushing 17 is arranged at the position of the front end opening 160 of the socket groove 161. The bushing 17 can be made of plastic or other shock-absorbing materials that are better than metal tools, and can be fixed at the front end position of the socket groove 161 by the joint component 174. Moreover, the bushing 17 cannot rotate corresponding to the socket groove 161, and the bushing 17 has a through hole 171 corresponding to the axial direction of the socket groove 161 in the center. A second through hole 173 is provided at the position of the first through hole 163 of the connecting groove 161 ; the side frame portion 15 is connected to the side plate 151 , and a second pivot portion 18 is disposed above the center of the side frame portion 15 . The second pivot connection A blocking edge 181 is provided under the part 18 , and a third pivoting part 19 is disposed on the rear side of the side frame part 15 .

The seat 2 is disposed at the center of the base frame 13 , with a fourth pivot portion 21 in the front center, and two fifth pivot portions 22 in the rear.

The seat back 3 is arranged behind the base frame 13 , and two sixth pivot portions 31 pivotally connected to the fifth pivot portion 22 of the seat 2 are arranged below, and two sides are pivotally connected to the third pivot portion 19 of the base frame 13 . the seventh pivot portion 32 .

The adjustment locking unit 4 has a movable rod 41, a control button 42, a control cable 43, and a locking device 44. The movable rod 41 can be inserted into the socket groove 161 of the positioning tube 16 and the through hole 171 of the bushing 17. A convex portion 411 is provided corresponding to the position of the concave portion 172 of the bushing 17 , so that the movable rod 41 cannot rotate in the socket groove 161 and can only extend and retract in the axial direction of the socket groove 161 . A number of first protruding teeth 412 are arranged continuously in the axial direction; an eighth pivot portion 413 is provided at the front end of the movable rod 41 to pivotally connect with the fourth pivot portion 21 of the seat 2 , and a front end is provided to limit the retraction of the movable rod 41 A blocking post 414 with a length and abutting against the front end bushing 17 of the positioning tube 16 is also provided behind the movable rod 41 with a guide wheel 415 whose diameter is larger than that of the movable rod 41 and can rotate along the inner wall of the socket groove 161 .

The control button 42 is disposed on the side of the base frame 13 , and has a hook portion 421 . The opposite side of the hook portion 421 has a ninth pivot portion 422 that can be pivotally connected to the second pivot portion 18 of the base frame 13 . An engaging hole 423 is also provided in the control button 42 .

The control cable 43 has two ends 431 and 432 , wherein one end 431 is combined with the engaging hole 423 of the control button 42 .

The locking device 44 has a pivoting block 45 , a locking block 46 , and an elastic member 47 . The pivoting block 45 has a tenth pivoting portion 451 that can be pivoted with the first pivoting portion 162 of the positioning tube 16 . An upper plate portion 452 and a side plate portion 453 are respectively provided above and at the side of the tenth pivot portion 451 . The upper plate portion 452 is provided with an engaging hole 454 so that the other end of the control cable 43 can be inserted through the engaging piece 164 of the positioning tube 16 . The sleeve hole 165 is formed, and the other end portion 432 is combined with the engaging hole 454 of the upper plate portion 452 . The sleeve hole 165 can improve the combined stability of the control cable 43 , and the side plate portion 453 is provided with an assembly hole 455 .

One side of the locking block 46 can be inserted through the first and second through holes 163, 173 of the positioning tube 16 and the bushing 17, and has a second convex tooth 461 that can engage with the first convex tooth 412 of the movable rod 41, and is opposite to the second convex tooth 461. One side of the protruding teeth 461 is provided with an assembly hole 462 through which the engagement element 463 can be engaged with the assembly hole 455 of the pivot block 45 , and a slot 464 through which the control cable 43 can be inserted is disposed in the center of the locking block 46 .

The elastic member 47 is a telescopic spring disposed between the upper plate portion 452 of the pivoting block 45 and the locking block 46 , and two ends abut against the inner wall of the upper plate portion 452 and the top wall of the locking block 46 respectively, and can provide the pivoting block 45 and the locking block 46 . The locking block 46 acts elastically.

In this embodiment, when the control button 42 is not hooked, the elastic force of the elastic member 47 enables the second protruding teeth 461 of the locking block 46 to engage with the first protruding teeth 412 of the movable rod 41, and can locate the seat 2 and the seat The back 3 is tilted back, and the control button 42 can abut against the retaining edge 181 to locate the position where the control button 42 is not hooked.

Please refer to FIGS. 5 and 6 , in this embodiment, when the back angle of the seat back 3 is to be changed, the hand can hook the hook portion 421 of the control button 42 to make the control button 42 pivot, while the control button 42 is in a fixed position in this embodiment It does not move in the conventional way, and can be used in accordance with the operating habits to have better convenience in use, and the control button 42 can drive the control cable 43 and the pivot block 45 and the locking block 46 of the locking device 44 to displace, and make the locking block 46 The second protruding teeth 461 can be separated from the first protruding teeth 412 and compress the elastic member 47 at the same time. At this time, the user can tilt the seat back 3 to an appropriate angle, and the seat 2 can drive the movable rod 41 to move forward accordingly. The bushing 17 with better shock absorption is connected with the movable rod 41 and the guide wheel 415 of the movable rod 41 to roll in the socket groove 161 to improve the stability of the movement and the mute effect.

Referring to FIGS. 6 and 7 , after the adjustment of this embodiment, the pivot block 45 can be pivoted by the elastic force of the elastic member 47 only by releasing the control button 42 , so that the locking block 46 is displaced toward the positioning tube 16 , and the first The two protruding teeth 461 can engage with the first protruding teeth 412 at the corresponding positions, and can locate the position of the seat 2 and the back angle of the seat back 3 .

Therefore, according to the above, this embodiment can be locked or unlocked by pulling the control button 42, which is easy to operate, and the first and second protruding teeth 412 and 461 in this embodiment are engaged and positioned without sliding, which can be compared with conventional ones. The clamping method has better positioning stability, and if the control button 42 is disposed on the seat 2 or the seat back 3, this embodiment can also achieve better positioning stability by engaging and locking.

Although specific embodiments have been described and described, many modifications and variations are possible without departing from the technical scope of the present embodiment, which defines the scope of the appended claims.

Claims (10)

1. The seat back angle adjustment and positioning mechanism is characterized in that it includes: A base, which can be grounded, has a base frame, the base frame has a positioning pipe protruding toward the front, the positioning pipe has a socket groove, an opening in the front, and a through-connecting sleeve is arranged on the side wall of the positioning pipe The first through hole of the connecting groove; a seat, located in the center of the base frame; a seat back, arranged behind the base frame, the lower part is pivotally connected to the rear of the seat, and the side is pivotally connected to the base frame; An adjustment locking unit with a movable rod, a control button, a control cable, and a locking device. The movable rod is set in the socket groove and can be axially extended and retracted. The outer side corresponds to the position of the first through hole. The front end of the movable rod is pivotally connected to the front of the seat; the two ends of the control rigging, one end of which is connected with the control button; and the locking device mainly has a locking block, an elastic The locking block is set at the position of the first through hole of the positioning block, and has a second protruding tooth on one side that can engage with the first protruding tooth, and the locking block is linked and combined with the other end of the control cable; and the elastic The element provides the engaging elastic force of the first and second protruding teeth to lock the movable rod, and the displacement of the locking block can be controlled by the control button to make the first and second protruding teeth disengage the non-locking movable rod. 2 . The seat back angle adjustment and positioning mechanism according to claim 1 , further comprising a bushing with shock absorption properties compared to metal, the bushing is fixed at the front end of the socket groove and cannot be Corresponding to the rotation of the socket slot, there is a through hole in the center corresponding to the axial direction of the socket slot, one side of the perforation is provided with a concave portion, and a first through hole position corresponding to the first through hole of the socket slot is provided in the concave portion of the perforation. Two through holes; the movable rod is provided with a convex part corresponding to the concave part of the bushing, so that the movable rod can be inserted through the perforation of the bushing without rotating corresponding to the bushing, and the first convex teeth are arranged on the convex part. 3 . The seat back angle adjustment and positioning mechanism according to claim 2 , wherein a guide wheel having a diameter larger than that of the movable rod and rotatable along the inner wall of the socket groove is arranged behind the movable rod. 4 . 4 . The seat back angle adjustment and positioning mechanism of claim 1 , wherein the base frame has at least one side frame portion, and at least one second pivot portion is disposed above the side frame portion, and the control The button is arranged on the side of the base frame and has a hook portion, and the opposite side of the hook portion has a ninth pivot portion which can be pivotally connected with the second pivot portion of the base frame. 5 . The seat back angle adjustment and positioning mechanism of claim 1 , wherein a first pivot portion is disposed on the side wall of the positioning tube near the first through hole; and the locking device further comprises a pivot. 6 . a connecting block, the pivoting block has a tenth pivot part which can be pivotally connected with the first pivot part of the positioning tube, and an upper plate part and a side plate part are respectively arranged above and on the side of the tenth pivot part, The upper plate part is combined with the other end of the control cable; the side plate is combined with the locking block, and a slot hole through which the control cable can be inserted is arranged in the center of the locking block, and the other end of the control cable is passed through the slot hole and Combination of upper plate. 6 . The seat back angle adjustment and positioning mechanism of claim 5 , wherein the elastic member is disposed between the upper plate portion of the pivot block and the locking block, and can provide the pivot block’s operating elasticity. 7 . 7 . The seat back angle adjustment and positioning mechanism of claim 6 , wherein the elastic member is a telescopic spring, two ends of which are respectively abutted against the inner side of the upper plate portion and the top surface of the locking block. 8 . 8 . The seat back angle adjustment and positioning mechanism of claim 5 , wherein a joint piece is disposed below the first pivot portion, and the joint piece can be inserted through the sleeve hole of the control cable. 9 . 9 . The seat back angle adjustment and positioning mechanism of claim 1 , wherein the base further comprises a base and a support, the base can be grounded, and the support is vertically arranged above the base; 10 . The base is erected above the pillar and has a horizontal frame portion, two sides of the horizontal frame portion are respectively provided with one side frame portion upward, and the positioning tube is arranged in the center of the horizontal frame portion and is inclined forward and upward. 10 . The seat back angle adjustment and positioning mechanism of claim 9 , wherein a third pivot portion is disposed at the rear of the side frame portion of the base frame; and a fourth pivot portion is disposed in the center of the front of the seat. 11 . The pivot part, at least one fifth pivot part is arranged at the rear, and at least one sixth pivot part pivotally connected to the fifth pivot part of the seat is arranged under the seat back, and the third pivot part is arranged on both sides with the base frame The connecting portion is pivotally connected to a seventh pivoting portion; and the front end of the movable rod has an eighth pivoting portion pivotally connected to the fourth pivoting portion of the seat.

Images