TWM590914U - Seat back angle adjustment and positioning mechanism - Google Patents

Abstract

This creation is a seat back angle adjustment positioning mechanism, which includes a base, a seat, a seat back, an adjustment locking unit, the base has a positioning tube, the positioning tube has a set of grooves, and the The back of the chair is arranged behind the base frame, the lower part is pivotally connected to the rear of the seat base, and the side is pivotally connected to the base frame; and the adjustment locking unit has a movable lever, a control button, a control cable, a locking device, the movable lever is provided In the socket groove, the outer side is provided with a number of first protruding teeth continuously arranged in the axial direction; the front end of the movable rod is pivotally connected to the front of the seat; the control button is provided on the base frame; and one end of the control cable is connected to the control Button connection; and the locking device mainly has a locking block and an elastic piece, one side of the locking block has a second protruding tooth that can mesh with the first protruding tooth, and the locking block is combined with the control cable; and the elastic piece Provides the elastic force of the first and second convex teeth; by this way, the creation can be controlled by the control button to lock or unlock, and can have the convenience of adjusting and positioning the angle of the seat back and stability.

Description

Seat back angle adjustment positioning mechanism

This creation relates to a seat back angle adjustment and positioning mechanism, which mainly refers to a seat back angle adjustment and adjustment mechanism.

It is known that a leisure chair with adjustable seating and reclining is generally provided with a rod body on the base, and the rod body is sleeved with a locking mechanism that can be displaced on the rod body, and the locking mechanism is engaged with the seat to make the adjustable chair The seat is displaced and the locking mechanism can be displaced along the rod body, and after being displaced to a set position, the locking mechanism is fixed to the rod body to position the seat, and the seat back is generally linked to the seat back when the seat is displaced, making it adjustable It is generally used at the angle of riding or reclining.

However, the conventional locking mechanism is mostly fixed by the knob pressing the rod body, but the tightening method is inconvenient to operate and the positioning is not indeed missing when it is not tightened, and the adjustment process of the knob is loosened because the back of the chair with the reclining angle is loose. It is easy to cause the back of the chair to lean back to the maximum angle due to its gravity, resulting in the inconvenience of adjusting the angle.

In order to improve the above-mentioned defects, the locking device in the case of US7735925 mainly includes a clamping seat, a positioning block, an adjusting rod, and a combination mechanism. The clamping seat is linked with the seat, and the seat is linked with the back of the seat, and can be sleeved. The sleeve hole of the seat rod body has first and second seat bodies which can be relatively expanded and clamped; the positioning block is arranged on the clamping seat, and the adjusting rod is combined and arranged on the side of the positioning block by a combination mechanism, and The positioning part is engaged with the positioning block, so that the adjustment rod can be pivoted to expand the first and second clip bodies and the seat can drive the clip seat to slide on the rod body, and at the same time change the back angle of the chair and slide When moving to the set position, the adjustment lever can be pivoted so that the first and second seat bodies can clamp the lever body, and the positions of the clamp seat and the seat seat can be locked, and the reclining angle of the chair can be positioned.

The aforementioned structure can make the first and second seat bodies expand or the clamping rod body can be locked by friction by pivoting the adjustment rod, which can have a simple and effective operation. However, when the clamping position is worn or greased, it may cause friction Insufficient force leads to insecure locking of the clamp, and the adjustment lever also moves correspondingly when the seat and the clamp are displaced, resulting in the user's hand not being able to control the adjustment lever according to the customary position, and if the clamp moves to the front to lie When leaning on the posture, the occupant may have to raise his hand to hold the adjustment lever that is displaced to the front to adjust, and the adjustment is less convenient.

The purpose of this creation is to provide a position that can lock the seat and adjust and position the angle of the seat back, and can have better operation convenience and locking stability structure.

This creation includes a base, a seat, a back, and an adjustment and locking unit. The base can be grounded and has a base frame. The base frame has a positioning tube that protrudes toward the front. The positioning tube has a set The connecting groove is provided with an opening in the front, and a first through hole penetrating the connecting socket is provided on the side wall of the positioning tube; the chair seat is located at the center of the base frame; and the back of the chair is located behind the base frame and below The back of the seat is pivotally connected, and the side is pivotally connected to the base frame; and the adjustment and locking unit has a movable rod, a control button, a control cable, and a locking device, the movable rod is set in the socket and can be axial Telescopic movement, the number of first protruding teeth arranged continuously along the axis corresponding to the position of the first through hole on the outside; the front end of the movable rod is pivotally connected with the front of the seat; and the two ends of the control rigging, one of which is connected to the control button Connection; and the locking device mainly has a locking block, an elastic member, the locking block is located at the first through-hole position of the positioning block, one side has a second convex tooth that can mesh with the first convex tooth, and the other side is convex Out of the positioning tube, the locking block is combined with the other end of the control cable; the elastic member provides the elastic force of the first and second convex teeth to lock the movable lever, and the control block can control the displacement of the locking block to make the first 2. The two convex teeth disengage without locking the movable rod.

Further, it includes a bush that is more shock-absorbing than metal. The bush is fixed at the front end of the socket and cannot rotate corresponding to the socket. The center has a perforation corresponding to the axial direction of the socket. A concave portion is provided, and a second through hole that can penetrate the side of the locking block is provided at the first through hole position of the socket corresponding to the socket of the perforated concave portion; and the movable rod is provided with a convex portion corresponding to the concave position of the bush, and the movable rod The perforation of the bushing can be inserted without corresponding rotation of the bushing, and the first convex tooth is provided on the convex portion, and a guide wheel with a larger diameter than the movable rod and rotatable along the inner wall of the bushing groove is provided behind the movable rod .

Further, the base frame has at least one side frame portion, at least one second pivot portion is provided above the side frame portion, and the control button is provided on the side of the base frame, with a hook portion, the opposite hook portion has a side A ninth pivotal portion pivotally connected to the second pivotal portion of the base frame.

Further, the side wall of the positioning tube is provided with a first pivoting portion near the first through hole; and the locking device further includes a pivoting block, the pivoting block can be connected with the first pivoting portion of the positioning tube. The ten pivot part is provided with an upper plate part and a side plate part respectively above and to the side of the tenth pivot part, the upper plate part is combined with the other end of the control cable; and the side plate part is connected with the locking block, and A slot through which the control cable can be inserted is provided in the center of the locking block, and the other end of the control cable is inserted through the slot and combined with the upper plate portion, and the elastic member is provided between the upper plate portion of the pivot block and the locking block, and It can provide the flexibility of the pivot block.

In this creation, when the control button is not hooked, the locking block can make the second convex tooth mesh with the first convex tooth of the movable rod by the elastic force of the elastic member, which can position the seat position and the back angle of the chair, and want to change the back of the chair At an angle, the hand can hook the control button to drive the pivoting block of the control cable and the locking device and the displacement of the locking block, and the second convex tooth of the locking block can be detached from the first convex tooth. At this time, the user can tilt the back of the chair to Appropriate angle, and the seat can drive the movable rod to move forward correspondingly. The better shock-absorbing bushing sleeves the movable rod and the guide wheel of the movable rod rolls in the sleeve groove to improve the better operation stability and mute effect, and adjust When the control button is released, the second convex teeth can be engaged with the first convex teeth at the corresponding position by the elastic force of the elastic member, and the seat position and the reclining angle of the seat can be positioned.

The creation can be locked or unlocked by hooking the control button, and the operation is simple, and the frame block pivoting drives the lock block to have good motion stability, and the creation is engaged by the first and second convex teeth to position Compared with the conventional clamping method, it has better positioning stability, and the creative control button is located at a fixed position, which can be used in accordance with operating habits and has better convenience.

Please refer to Figures 1 to 4, this creation includes a base 1, a seat 2, a seat back 3, an adjustment locking unit 4, the base 1 has a base 11, a pillar 12, a base frame 13, the The base 1 can be grounded, and the pillar 12 is vertically arranged above the base 11; and the base frame 13 is arranged above the pillar 12 and can pivot relative to the pillar 12 and has a cross frame portion 14 on both sides of the cross frame portion 14 Upside set side frame portion 15.

An oblique positioning tube 16 is provided in the center of the horizontal frame portion 14 toward the front and upward. The center of the positioning tube 16 has a set of connecting grooves 161 with an opening 160 in front of the set of connecting grooves 161 and a first pivot connection on the front side wall A first through hole 163 communicating with the sleeve groove 161 on one side of the first pivoting part 162, and an engaging piece 164 under the first pivoting part 162, the engaging piece 164 has a set of holes 165, A bush 17 is provided at the opening 160 at the front end of the socket 161. The bush 17 can be made of plastic or other materials with better shock absorption than metal, and can be fixed at the front end of the socket 161 by the joint element 174, and The bush 17 cannot rotate corresponding to the socket groove 161, and the center of the bush 17 has a through hole 171 corresponding to the axial direction of the socket groove 161, a recess 172 is provided on one side of the through hole 171, and the recess 172 of the through hole 171 is correspondingly sleeved A second through hole 173 is provided at the position of the first through hole 163 of the slot 161; and the side frame portion 15 engages the side plate 151, and a second pivoting portion 18 is provided above the center of the side frame portion 15 and the second pivoting portion 18 There is a retaining edge 181 below, and a third pivoting portion 19 is provided on the rear side of the side frame portion 15.

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

The seat back 3 is arranged behind the base frame 13, the sixth pivot part 31 which is pivotally connected with the fifth pivot part 22 of the seat 2 is arranged below, and the third pivot part 19 which is pivotally connected with the base frame 13 is arranged on both sides The seventh pivotal connection 32.

The adjusting and 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 161 of the positioning tube 16 and the through hole 171 of the bush 17, one side 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 does not rotate in the socket groove 161, and can only move axially in and out of the socket groove 161, and is provided in the convex portion 411 corresponding to the socket groove 161 The first protruding teeth 412 are continuously arranged along the axial direction; an eighth pivoting portion 413 is provided at the front end of the movable rod 41 to pivotally connect with the fourth pivoting portion 21 of the seat 2, and a movable rod 41 can be restrained from contracting at the front A stop post 414 whose length is in contact with the bush 17 at the front end of the positioning tube 16 is provided behind the movable rod 41 with a guide wheel 415 having a diameter larger than that of the movable rod 41 and rotatable along the inner wall of the sleeve groove 161.

The control button 42 is disposed on the side of the base frame 13 and has a hooking portion 421. The side of the hooking portion 421 has a ninth pivoting portion 422 that can pivotally connect with the second pivoting portion 18 of the base frame 13. The control button 42 is provided with an engaging hole 423.

The control cable 43 has two end portions 431 and 432, and one end portion 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 pivotally connect with the first pivoting portion 162 of the positioning tube 16, and An upper plate portion 452 and a side plate portion 453 are provided above and to the side of the tenth pivot portion 451 respectively, the upper plate portion 452 is provided with an engaging hole 454, and the other end of the control cable 43 can be inserted through the engaging piece 164 of the positioning tube 16 Hole 165, and the other end portion 432 is combined with the joint hole 454 of the upper plate portion 452, the set of holes 165 can improve the control cable 43 for better combination stability, and the side plate portion 453 is provided with an assembly hole 455.

One side of the locking block 46 can penetrate the first and second through holes 163, 173 of the positioning tube 16 and the bush 17, and has second protruding teeth 461 that can engage with the first protruding teeth 412 of the movable rod 41, and the second One side of the convex tooth 461 protrudes from the outside of the positioning tube 16 and is provided with a group connecting hole 462 that can be engaged with the group connecting hole 455 of the pivot block 45 and a slot through which the control cable 43 can be inserted in the center of the locking block 46孔464.

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

When the control button 42 is not hooked in this creation, the elastic force of the elastic member 47 can make the second protruding teeth 461 of the locking block 46 mesh with the first protruding teeth 412 of the movable rod 41, and can position the seat 2 and the back 3 Backward angle, and the control button 42 can abut the retaining edge 181 against the position where the positioning control button 42 is not hooked.

Please refer to Figs. 5 and 6. The author wants to change the reclining angle of the chair back 3 when the hand can move the grip portion 421 of the control button 42 to make the control button 42 pivot. If it is moved in a conventional manner, it can be matched with the operating habits for better convenience. Furthermore, the control button 42 can drive the pivoting block 45 and the locking block 46 of the control cable 43 and the locking device 44 to move, and make the first position of the locking block 46 The two convex teeth 461 can disengage the first convex teeth 412 and simultaneously compress the elastic member 47. 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 correspondingly. The shock-absorbing bushing 17 sleeves the movable rod 41 and the guide wheel 415 of the movable rod 41 rolls in the sleeve groove 161 to improve better operation stability and mute effect.

Please refer to FIGS. 6 and 7. After the creation and adjustment, only the control button 42 needs to be released to pivot the pivot block 45 by the elastic force of the elastic member 47 to move the locking block 46 toward the positioning tube 16 and make the second The convex teeth 461 can mesh with the corresponding first convex teeth 412 to position the seat 2 and the back angle of the seat 3.

Therefore, as mentioned above, the creation can be controlled by hooking the control button 42 to control whether it is locked or not, and the operation is simple, and the pivoting movement of the frame connecting block 45 to drive the locking block 46 can have a good operating stability, and the original creation The first and second convex teeth 412, 461 mesh and position without sliding, which can have better positioning stability than the conventional clamping method, and if the control button 42 is provided on the seat 2 or the back 3, this creation also It can achieve better positioning and stability by meshing and locking.

Although specific embodiments have been described and described, many modifications and changes are still possible without exceeding the scope of this creative technology, and this creative scope limits the scope of the attached patent applications.

1‧‧‧Dock 11‧‧‧Base 12‧‧‧ Pillar 13‧‧‧Bracket 14‧‧‧ Crossbar Department 15‧‧‧Side frame 151‧‧‧Side board 16‧‧‧Locating tube 161‧‧‧Socket socket 160‧‧‧ opening 162‧‧‧First pivot 163‧‧‧The first through hole 164‧‧‧Joint piece 165‧‧‧set hole 17‧‧‧ Bush 171‧‧‧Perforation 172‧‧‧recess 173‧‧‧The second through hole 174‧‧‧joining element 18‧‧‧The second pivot 181‧‧‧retain 19‧‧‧The third pivot 2‧‧‧chair seat 21‧‧‧The fourth pivot 22‧‧‧The fifth pivot 3‧‧‧back 31‧‧‧The sixth pivot 32‧‧‧The seventh pivot 4‧‧‧Adjust the locking unit 41‧‧‧movable rod 411‧‧‧Convex 412‧‧‧First convex tooth 413‧‧‧Eighth pivot 414‧‧‧pillar 415‧‧‧Guide wheel 42‧‧‧Control button 421‧‧‧Holding Department 422‧‧‧The ninth pivot 423‧‧‧Joint hole 43‧‧‧Control cable 431‧‧‧End 432‧‧‧End 44‧‧‧Locking device 45‧‧‧Pivot block 451‧‧‧ Tenth pivot 452‧‧‧ Upper Board Department 453‧‧‧Side board 454‧‧‧Joint hole 455‧‧‧ group connection hole 46‧‧‧locking block 461‧‧‧Second convex tooth 462‧‧‧Group connection hole 463‧‧‧joining element 464‧‧‧Slot 47‧‧‧Elastic parts

Figure 1 is a combination drawing of this creation.

Figure 2 is a partial exploded view of this creation.

Figure 3 is a side view of this creation.

Figure 4 is a partial cross-sectional view of this creation, showing the locked state.

Figure 5 is a schematic diagram of the movement of the control button to adjust the angle of the chair back.

Figure 6 is a cross-sectional view of this creative part, showing the unlocked state.

Figure 7 is a cross-sectional view of the original part of the creation, showing the locked state after adjusting the angle of the chair back.

1‧‧‧Dock

11‧‧‧Base

12‧‧‧ Pillar

13‧‧‧Bracket

14‧‧‧ Crossbar Department

15‧‧‧Side frame

151‧‧‧Side board

16‧‧‧Locating tube

18‧‧‧The second pivot

19‧‧‧The third pivot

2‧‧‧chair seat

21‧‧‧The fourth pivot

22‧‧‧The fifth pivot

3‧‧‧back

31‧‧‧The sixth pivot

32‧‧‧The seventh pivot

413‧‧‧Eighth pivot

42‧‧‧Control button

422‧‧‧The ninth pivot

43‧‧‧Control cable

44‧‧‧Locking device

Claims (10)

A seat back angle adjustment positioning mechanism, including: A base, which can reach the ground, has a base frame, the base frame has a positioning tube protruding toward the front, the positioning tube has a set of connecting grooves, an opening in the front, and a through communication sleeve is arranged on the side wall of the positioning tube The first through hole of the connection slot; A chair seat, located in the center of the base frame; A chair back, located behind the base frame, pivotally connected to the rear of the seat base at the bottom, and pivotally connected to the base frame at the side; 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 and can be axially telescopically moved, the outer side corresponds to the number of the first through-hole position along the axis The first protruding teeth are arranged continuously; the front end of the movable rod is pivotally connected to the front of the seat; and the two ends of the control rigging, one end of which is connected to the control button; and the locking device mainly has a locking block and an elasticity The locking block is provided at the first through hole position of the positioning block, one side has a second convex tooth that can mesh with the first convex tooth, the other side protrudes out of the positioning tube, and the locking block and the control cable The other end is connected and combined; the elastic member provides the elastic force of the first and second convex teeth to lock the movable rod, and the control block can control the displacement of the locking block to disengage the first and second convex teeth from the unlocking movable rod. The seat back angle adjustment and positioning mechanism according to claim 1, which further includes a bush with a more shock-absorbing metal, the bush is fixed at the front end of the socket and cannot rotate corresponding to the socket, the center There is a perforation corresponding to the axial direction of the socket, a recess is provided on one side of the perforation, and a second through hole through the side of the locking block is provided at the position of the first through hole corresponding to the socket of the perforated recess; The rod is provided with a convex portion corresponding to the position of the concave portion of the bush, so that the movable rod can penetrate the perforation of the bush and does not rotate corresponding to the bush, and the first convex tooth is provided on the convex portion. The seat back angle adjustment positioning mechanism according to claim 2, wherein a guide wheel with a diameter larger than the movable rod and rotatable along the inner wall of the socket is provided behind the movable rod. The seat back angle adjustment positioning mechanism according to claim 1, wherein the base frame has at least one side frame portion, at least one second pivoting portion is provided above the side frame portion, and the control button is provided on the side of the base frame Squarely, there is a hooking portion, and a side of the opposite hooking portion has a ninth pivoting portion pivotally connected to the second pivoting portion of the base frame. The seat back angle adjustment positioning mechanism according to claim 1, wherein the positioning tube side wall is provided with a first pivoting portion near the first through hole; and the locking device further includes a pivoting block, the pivoting block It has a tenth pivotal part which can be pivotally connected with the first pivotal 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 pivotal part. One end is combined; and the side plate is connected with the locking block, and a slot through which the control cable can be inserted is provided in the center of the locking block, and the other end of the control cable is inserted through the slot and combined with the upper plate. The seat back angle adjustment positioning mechanism according to claim 5, wherein the elastic member is disposed between the upper plate portion of the pivoting block and the locking block, and can provide the elasticity of the pivoting block to operate. The seat back angle adjustment and positioning mechanism according to claim 6, wherein the elastic member is a telescopic spring, and the two ends abut the inner side of the upper plate portion and the top surface of the locking block, respectively. The seat back angle adjustment and positioning mechanism of claim 5, wherein an engagement piece is provided below the first pivotal portion, and the engagement piece has a sleeve hole through which the control cable can be inserted. The seat back angle adjustment positioning mechanism according to claim 1, wherein the base further includes a base and a pillar, the base can be grounded, and the pillar is vertically arranged above the base; and the base is erected on the pillar Above, there is a horizontal frame part, and two side parts of the horizontal frame part are respectively provided with a side frame part upward, and the positioning tube is arranged at the center of the horizontal frame part obliquely toward the front and upward. The seat back angle adjustment positioning mechanism as described in claim 9, wherein a third pivot portion is provided on the rear side of the side frame portion of the base frame; and a fourth pivot portion is provided in the front center of the seat, and a rear portion is provided At least a fifth pivotal part, and at least a sixth pivotal part pivotally connected to the fifth pivotal part of the seat base is provided under the seat back, and a third pivotal part pivotally connected to the third pivotal part of the base frame is provided on both sides Seven pivot joints; and the front end of the movable rod has an eighth pivot joint and a fourth pivot joint of the seat.

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