CN209932077U

CN209932077U - Multi-stage locking structure of swivel chair back

Info

Publication number: CN209932077U
Application number: CN201920885513.3U
Authority: CN
Inventors: 李荷方
Original assignee: Taizhou Tai Tai Furniture Co Ltd
Current assignee: Taizhou Tai Tai Furniture Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-01-14
Anticipated expiration: 2029-06-13

Abstract

The utility model provides a multistage locking structure of swivel chair back belongs to furniture technical field. It has solved current locking structure too complicated, also comparatively difficult class of technical problem in the later stage maintenance relatively. This multistage locking structure of swivel chair back of the chair, the swivel chair includes the base and the back of the chair, be equipped with round pin axle one and round pin axle two on the base, round pin axle one and round pin axle two between be equipped with expanding spring and lock plate, the one end that is equipped with wane and wane on the base is articulated with round pin axle two, the back of the chair is fixed on the wane, round pin axle one and round pin axle two between be equipped with flexible guide arm, flexible guide arm can extend or shrink along with the rotation of wane, the relative base's of lock plate lateral surface protrusion sets up and moves along with the rotation of wane, a plurality of lockhole has been seted up on the lock plate, multistage locking structure sets up the lateral surface at the base and. The utility model has the advantages of convenient adjustment, reliable structure and convenient maintenance.

Description

Multi-stage locking structure of swivel chair back

Technical Field

The utility model belongs to the technical field of furniture, a multistage locking structure of chair, especially a swivel chair back of the chair is related to.

Background

The swivel chair is one of the mainstream configurations of people in places such as families, offices and the like, and most of the tilt adjusting mechanisms of the swivel chair backs in the existing markets have complicated structures, so that the cost for manufacturing the swivel chair is increased, and the swivel chair is relatively difficult to maintain.

For example, in chinese patent document No. (grant publication No. CN 104207520B), a chair back rocker locking mechanism for a swivel chair chassis includes a locking plate, a torsion spring a, a bolt, and a pin seat, where the locking plate is provided with a row of locking holes, the locking plate is fixedly connected to a fourth pin shaft and moves synchronously with the fourth pin shaft under the action of the rocker, the fourth pin shaft is a whole long shaft, the pin seat is located beside the locking plate and is fixedly connected to the chassis base, the bolt is slidably inserted into the pin seat and is engaged with the pin hole, a first arm of the torsion spring a is connected to the bolt, and a second arm of the torsion spring a is connected to a driving device for driving the torsion spring a to rotate back and forth.

The structure realizes the insertion and withdrawal of the bolt into and out of the lock hole by controlling the bolt through the torsion spring, and although the inclination adjustment of the chair back can be realized, the bolt cannot move along with the rotation of the torsion spring due to the failure of the torsion spring under the condition of long-term repeated torsion, and the later maintenance is relatively difficult due to the structural complexity.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a multistage locking structure of the swivel chair back of the chair, the utility model provides a technical problem how can more convenient inclination to the back of the chair adjust.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a multistage locking structure of swivel chair back of the chair, the swivel chair includes the base and the back of the chair, be equipped with round pin axle one and round pin axle two on the base, round pin axle one and round pin axle two between be equipped with expanding spring and lock plate, the one end that is equipped with wane and wane on the base is articulated with round pin axle two, the back of the chair is fixed on the wane, a serial communication port, round pin axle one and round pin are equipped with flexible guide arm between the axle two, flexible guide arm can extend or shrink along with the rotation of wane, the lateral surface protrusion setting of the relative base of lock plate just removes along with the rotation of wane, a plurality of lockhole has been seted up on the lock plate, multistage locking structure sets up the lateral surface at the base and can cooperate the fixed corresponding.

The rocker, the locking plate and the manner in which the rocker drives the locking plate are all the same as those in chinese patent document (No. CN 104207520B), and belong to the prior art. When the back of the chair is inclining backward, the drive wane rotates around the base, the wane rotates and can drive round pin axle two to round pin axle an orientation and remove, the removal of round pin axle one can drive the lock plate and remove, thereby make multistage locking structure fix the angle that the current back of the chair inclines through the lockhole of the correspondence on the lock plate, place multistage locking structure and lock plate at the lateral surface of base and can conveniently maintain, make the maintainer need not to unpack apart the seat of connecting on the base and also can maintain multistage locking mechanism, also reduce the inside complexity of base simultaneously, reduce the limitation of base inner chamber space, make multistage locking structure can realize fixed wane turned angle's purpose with simplest mechanism.

In the multistage locking structure of foretell swivel chair back of the chair, multistage locking structure includes the lock seat, is located bolt and cover in the lock seat are established reset spring on the bolt, the lock seat is fixed in the one side that is close to the lockhole on the base, the one end of bolt is fixed with the cable, the lock plate can just to setting up with the round pin axle through making every lockhole homoenergetic around two rotations of round pin axle, the cable can drive the bolt and withdraw from in the lockhole, reset spring can drive the bolt and insert in the lockhole. The back of the chair is inserted in the lockhole at the bolt under the non-rotation condition, and when the zip driven the bolt and withdraw from in the lockhole, the wane can rotate and drive the lock plate and remove for another lockhole removes to the position just right with the bolt, and release reset spring can drive the bolt and insert back again in the lockhole after the zip, thereby the inclination of the convenient regulation back of the chair.

In the multistage locking structure of the swivel chair back, a groove is formed in one side face, fixed on the base, of the lock seat, the reset spring is located in the groove, the length of the groove is smaller than or equal to the elastic length of the reset spring, a bolt hole is formed in one side face, opposite to the lock seat and the lock plate, of the lock seat and communicated with the groove, the reset spring is axially arranged along the bolt hole, and the bolt is located in the bolt hole and penetrates through the reset spring. The reset spring is placed in the groove, so that when the elasticity of the reset spring is poor, the reset spring can be replaced from the groove by detaching the lock seat, and the aim of reducing the maintenance cost is fulfilled; the bolt hole can be spacing and fixed to the direction of bolt for the bolt can only move along the axis direction of bolt under the effort of zip and reset spring.

In the multistage locking structure of the swivel chair back, the side face of the bolt is vertically penetrated with the limiting rod, the length of the limiting rod is larger than the aperture of the bolt hole, and the limiting rod is abutted against the inner side wall of the groove when the bolt is inserted into the lock hole. The limiting rod can well limit the movement of the bolt in the axis direction, and the bolt is prevented from being driven by the elastic force of the reset spring to be excessively inserted into the lock hole.

In the multistage locking structure of foretell swivel chair back of the chair, the spacing hole with bolt hole concentric centre is seted up to the one side of keeping away from the lock plate on the lock seat, the one end that the lock plate was kept away from to the bolt is fixed with the stopper, the stopper can remove along with the bolt, the tip at the stopper is fixed to the cable, and when the bolt was inserted in the lock hole the bottom surface of stopper supported in the bottom in spacing hole. The limiting block can further limit the axial movement of the bolt in the lock seat.

In the multistage locking structure of foretell swivel chair back of the chair, a side that relative locking plate is close to the lock seat on the base is fixed with the fixed block, two fixed slots to lock seat orientation and to the bottom slope are seted up to the fixed block and a side relative with the bolt hole and are formed the fixed plate parallel with lock seat side, distance between stopper and the fixed plate is greater than the hole depth of lockhole, the width of stopper is less than the width of fixed slot and can be along fixed slot round trip movement, the outer cable cover of cable is fixed on the fixed plate, the cable passes the fixed plate and is connected with the stopper. The fixed plate can be fine becomes the fulcrum of zip pulling bolt, and the fixed plate passes through the fixed block equally with the bolt setting at the adjacent both sides face of base, offsets each other between two power when making the pulling zip, can not produce the phenomenon of skidding, and the axial direction of motion of bolt can further be corrected to the fixed slot.

In the multi-stage locking structure of the swivel chair back, the telescopic spring is sleeved outside the telescopic guide rod, the telescopic guide rod comprises a sleeve with one end fixed on the second pin shaft and a piston rod with one end fixed on the first pin shaft, the other end of the piston rod is positioned in the sleeve, and the length of the piston rod plus the length of the sleeve is greater than the maximum distance between the first pin shaft and the second pin shaft. The length requirement when the sleeve pipe and the piston rod cooperate and can satisfy the contraction or expansion between the first pin shaft and the second pin shaft can be met, the expansion spring can not be bent when being expanded or contracted, and the guide effect is achieved for the expansion spring.

In the multistage locking structure of the swivel chair back, a movable opening is formed in the top of one side, close to the first pin shaft, of the base, one end, close to the first pin shaft, of the locking plate enters and exits the movable opening through the movement of the second pin shaft, a placing opening is formed in the top of one side, close to the second pin shaft, of the base, and one end, provided with the locking hole, of the locking plate enters and exits the placing opening through the movement of the second pin shaft. The setting of placing the mouth can make the locking plate can directly pass in and out when the motion and place the mouth, can not blocked by the base inside wall, and the setting of activity mouth can realize the spacing effect of locking plate, prevents that the locking plate from producing the skew when removing, and on the other hand can also save partly raw materials that are used for producing the support base with this.

Compared with the prior art, the multi-stage locking structure of the swivel chair back has the advantages of convenience in adjustment, reliable structure and convenience in maintenance.

Drawings

Fig. 1 is a schematic perspective view of the multi-stage locking structure of the swivel chair back.

Fig. 2 is a side sectional structural view of the multi-stage locking structure of the swivel chair back.

In the figure, 1, a base; 10. a movable opening; 11. a placement port; 12. a first pin shaft; 13. a second pin shaft; 14. a tension spring; 15. a sleeve; 16. a piston rod; 2. a lock plate; 20. a lock hole; 3. a seesaw; 4. a lock seat; 40. a return spring; 41. a groove; 42. a pin hole; 43. a limiting hole; 5. a bolt; 50. a limiting rod; 51. a limiting block; 6. a cable; 60. a cable cover; 7. a fixed block; 70. a fixing plate; 71. and fixing the grooves.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the multi-stage locking structure of the back of the swivel chair, the swivel chair includes a base 1 and a back of the chair (not shown), a first pin shaft 12 and a second pin shaft 13 are provided on the base 1, an expansion spring 14 and a locking plate 2 are provided between the first pin shaft 12 and the second pin shaft 13, the locking plate 2 is disposed in a protruding manner relative to the outer side surface of the base 1 and moves along with the rotation of the rocker 3, a plurality of locking holes 20 are provided on the locking plate 2, one end of the rocker 3 and the rocker 3 are hinged to the second pin shaft 13 on the base 1, the back of the chair is fixed on the rocker 3, a movable opening 10 is provided at the top of one side close to the first pin shaft 12 on the base 1, one end of the locking plate 2 close to the first pin shaft 12 passes through the movable opening 10 for moving in and out of the second pin shaft 13, a placing opening 11 is provided at the top of one side close to the second pin. In the embodiment, the locking plate is provided with three locking holes, so that the inclination angle of the chair back is respectively fixed at 8 degrees, 16 degrees and 24 degrees.

As shown in fig. 1 and 2, a telescopic guide rod is arranged between the first pin shaft 12 and the second pin shaft 13, the telescopic guide rod can extend or contract along with the rotation of the rocker 3, a telescopic spring 14 is sleeved outside the telescopic guide rod, the telescopic guide rod comprises a sleeve 15 with one end fixed on the second pin shaft 13 and a piston rod 16 with one end fixed on the first pin shaft 12, the other end of the piston rod 16 is positioned in the sleeve 15, and the length of the piston rod 16 plus the length of the sleeve 15 is greater than the maximum distance between the first pin shaft 12 and the second pin shaft 13.

As shown in fig. 1 and fig. 2, the multistage locking structure is disposed on the outer side of the base 1 and can cooperate with the lock hole 20 to fix the rotation angle of the corresponding rocker 3, the multistage locking structure includes a lock base 4, a bolt 5 disposed in the lock base 4 and a return spring 40 disposed on the bolt 5, a groove 41 is disposed on a side surface of the lock base 4 fixed on the base 1, the return spring 40 is disposed in the groove 41, the length of the groove 41 is less than or equal to the elastic length of the return spring 40, a bolt hole 42 is disposed on a side surface of the lock base 4 opposite to the lock plate 2 and communicated with the groove 41, the return spring 40 is axially disposed along the bolt hole 42, and the bolt 5 is disposed in the bolt hole 42 and passes through the return spring 40.

As shown in fig. 1 and 2, the lock seat 4 is fixed on one side of the base 1 close to the lock hole 20, one end of the bolt 5 is fixed with a guy cable 6, the lock plate 2 can make each lock hole 20 be arranged opposite to the pin shaft by rotating around the second pin shaft 13, the guy cable 6 can drive the bolt 5 to withdraw from the lock hole 20, the reset spring 40 can drive the bolt 5 to insert into the lock hole 20, the side surface of the bolt 5 is vertically inserted with a limiting rod 50, the length of the limiting rod 50 is greater than the aperture of the bolt hole 42, and the limiting rod 50 abuts against the inner side wall of the groove 41 when the bolt 5 is inserted into the lock hole 20.

As shown in fig. 1 and fig. 2, a limiting hole 43 concentric with the bolt hole 42 is formed in one side of the lock base 4 away from the lock plate 2, a limiting block 51 is fixed at one end of the bolt 5 away from the lock plate 2, the limiting block 51 can move along with the bolt 5, the inhaul cable 6 is fixed at the end of the limiting block 51, and when the bolt 5 is inserted into the lock hole 20, the bottom surface of the limiting block 51 abuts against the bottom of the limiting hole 43.

As shown in fig. 1 and 2, a fixing block 7 is fixed on a side surface of the base 1 opposite to the locking plate 2 and close to the lock seat 4, two fixing grooves 71 inclined towards the direction of the lock seat 4 and towards the bottom are formed on a side surface of the fixing block 7 opposite to the bolt hole 42, and a fixing plate 70 parallel to the side surface of the lock seat 4 is formed, a distance between the limiting block 51 and the fixing plate 70 is greater than a depth of the lock hole 20, a width of the limiting block 51 is smaller than a width of the fixing groove 71 and can move back and forth along the fixing groove 71, an outer layer cable sleeve 60 of the cable 6 is fixed on the fixing plate 70, and the cable 6 passes through the.

When the back of the chair is inclining backward, it rotates around base 1 to drive wane 3, wane 1 rotates and can drive two 13 of round pin axle and remove to a 12 directions of round pin axle, the removal of round pin axle a 12 can drive locking plate 2 and remove, thereby make multistage locking structure fix the angle that the current back of the chair inclines through the lockhole 20 of the correspondence on the locking plate 2, place multistage locking structure and locking plate 2 at base 1's lateral surface can conveniently maintain, make maintenance personal need not to unpack apart the seat of connecting on the base 1 and also can maintain multistage locking mechanism, also reduce the inside complexity of base 1 simultaneously, reduce the limitation in base 1 inner chamber space, make multistage locking structure can realize the purpose of fixed wane 3 turned angle with simplest mechanism.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a multistage locking structure of swivel chair back of chair, swivel chair include base (1) and the back of the chair, be equipped with round pin axle (12) and round pin axle two (13) on base (1), it is equipped with expanding spring (14) and lock plate (2) to sell between round pin axle (12) and round pin axle two (13), the one end that is equipped with wane (3) and wane (3) on base (1) is articulated with round pin axle two (13), the back of the chair is fixed on wane (3), a serial communication port, it is equipped with flexible guide arm to sell between round pin axle (12) and round pin axle two (13), flexible guide arm can extend or shrink along with the rotation of wane (3), the lateral surface protrusion setting of the relative base (1) of lock plate (2) just moves along with the rotation of wane (3), a plurality of lockhole (20) have been seted up on lock plate (2), multistage locking structure sets up the lateral surface of base (1) and can cooperate lockhole (20) fixed corresponding wane (3) live angle of rotation And (4) degree.

2. The multi-stage locking structure of the swivel chair back of claim 1, characterized in that the multi-stage locking structure comprises a lock base (4), a bolt (5) located in the lock base (4) and a return spring (40) sleeved on the bolt (5), the lock base (4) is fixed on one side of the base (1) close to the lock hole (20), a pull cable (6) is fixed at one end of the bolt (5), the locking plate (2) can rotate around a second pin shaft (13) to enable each lock hole (20) to be arranged opposite to the pin shaft, the pull cable (6) can drive the bolt (5) to exit from the lock hole (20), and the return spring (40) can drive the bolt (5) to be inserted into the lock hole (20).

3. The multi-stage locking structure of the swivel chair back of claim 2, wherein a groove (41) is formed in one side surface of the lock base (4) fixed to the base (1), the return spring (40) is located in the groove (41), the length of the groove (41) is smaller than or equal to the elastic length of the return spring (40), a bolt hole (42) is formed in one side surface of the lock base (4) opposite to the locking plate (2) and penetrates through the groove, the bolt hole (42) is communicated with the groove (41), the return spring (40) is axially arranged along the bolt hole (42), and the bolt (5) is located in the bolt hole (42) and penetrates through the return spring (40).

4. The multi-stage locking structure of the chair back of the swivel chair as claimed in claim 3, wherein a limiting rod (50) is vertically inserted into the side surface of the bolt (5), the length of the limiting rod (50) is greater than the aperture of the bolt hole (42), and the limiting rod (50) abuts against the inner side wall of the groove (41) when the bolt (5) is inserted into the lock hole (20).

5. The multi-stage locking structure of the swivel chair back of claim 3, wherein a limiting hole (43) concentric with the bolt hole (42) is formed in one side, away from the locking plate (2), of the lock seat (4), a limiting block (51) is fixed to one end, away from the locking plate (2), of the bolt (5), the limiting block (51) can move along with the bolt (5), the inhaul cable (6) is fixed to the end portion of the limiting block (51), and when the bolt (5) is inserted into the lock hole (20), the bottom surface of the limiting block (51) abuts against the bottom of the limiting hole (43).

6. The multi-stage locking structure of the swivel chair back as claimed in claim 5, wherein a fixed block (7) is fixed to one side surface of the base (1) close to the lock seat (4) opposite to the locking plate (2), two fixed grooves (71) inclined towards the lock seat (4) and towards the bottom are formed in one side surface of the fixed block (7) opposite to the bolt hole (42) and form a fixed plate (70) parallel to the side surface of the lock seat (4), the distance between the limited block (51) and the fixed plate (70) is greater than the hole depth of the lock hole (20), the width of the limited block (51) is smaller than the width of the fixed groove (71) and can move back and forth along the fixed groove (71), a guy cable sleeve (60) on the outer layer of the guy cable (6) is fixed on the fixed plate (70), and the guy cable (6) passes through the fixed plate (70) and is connected with the limited block (.

7. The multi-stage locking structure of the swivel chair back as claimed in claim 1, wherein the extension spring (14) is sleeved outside the extension guide rod, the extension guide rod comprises a sleeve (15) with one end fixed on the second pin (13) and a piston rod (16) with one end fixed on the first pin (12), the other end of the piston rod (16) is located in the sleeve (15), and the length of the piston rod (16) plus the length of the sleeve (15) is greater than the maximum distance between the first pin (12) and the second pin (13).

8. The multi-stage locking structure of the back of the swivel chair as claimed in claim 1, wherein a movable opening (10) is formed in the top of one side of the base (1) close to the first pin (12), one end of the locking plate (2) close to the first pin (12) enters and exits the movable opening (10) through the movement of the second pin (13), a placing opening (11) is formed in the top of one side of the base (1) close to the second pin (13), and one end of the locking plate (2) with a locking hole (20) enters and exits the placing opening (11) through the movement of the second pin (13).