CN217285221U - Liftable seat back structure of adjusting - Google Patents

Abstract

The utility model belongs to the field of furniture, concretely relates to but chair back structure of lifting adjustment, including the supporting seat, upper and lower sliding fit on the supporting seat fossil fragments, set up back subassembly and the lift adjustment subassembly on fossil fragments, the lift adjustment subassembly sets up in the spanner spare and the locking piece of fossil fragments including the activity, the locking piece is used for cooperating with the supporting seat locking, spanner spare is used for supplying the people to control, and it can order about the locking piece activity, makes locking piece and supporting seat unblock. The utility model discloses a structure of spanner spare and locking piece can drive the locking piece when spanner spare rotation regulation and rotate to realize keeping off the position and adjust convenient operation.

Description

Liftable seat back structure of adjusting

Technical Field

The utility model belongs to the field of furniture, concretely relates to seat back structure that liftable was adjusted.

Background

Traditional study chair does not possess back raising and lowering functions, and the user can't adjust the back position according to individual actual conditions, leads to the user to use comfortable inadequately.

In order to solve the problem, some study chairs with a backrest lifting function are already available on the market, and the backrest lifting mechanism of the study chairs mostly adopts a mechanical knob manual adjusting mechanism. For example, chinese patent publication No. CN209983860U discloses a chair back structure of a child seat, comprising a back plate and a chair frame, wherein the back plate is disposed on the chair frame, the back plate comprises a left back plate, a right back plate and a lumbar support back plate, a gap with a length of 1-3 cm is left between the left back plate and the right back plate, the lumbar support back plate is disposed below the central position of the left back plate and the right back plate, the chair frame comprises a back plate chair frame and a lumbar support chair frame, the left back plate and the right back plate are disposed on one end of the back plate chair frame in a relative mirror image manner, the other end of the back plate chair frame is detachably mounted on a back plate chair frame lifting sleeve through a bolt, the lumbar support back plate is mounted on one end of the lumbar support chair frame, the other end of the lumbar support chair frame is detachably mounted on a lumbar support lifting sleeve through a bolt, the back plate chair frame lifting sleeve and the lumbar support chair frame lifting sleeve are both assembled on a single tube from top to bottom through a detachable connecting structure, the waist rest chair frame is arranged below the back plate chair frame.

Although the chair back structure of the above patent can realize the lifting of the chair back, the following problems still exist: 1. the backrest is heavy, so that the adjusting difficulty is high; 2. the operation steps are complicated, the adjusting speed is slow, and the efficiency is low; 3. the gear adjustment is realized by overcoming the gravity of the backrest, and the hand feeling is poor.

SUMMERY OF THE UTILITY MODEL

In order to compensate for the defects of the prior art, the utility model provides a seat backrest structure technical scheme capable of being adjusted in a lifting way.

The utility model provides a but chair back structure of lifting adjustment, its characterized in that includes the supporting seat, upper and lower sliding fit fossil fragments on the supporting seat, sets up back subassembly and lift adjustment subassembly on fossil fragments, lift adjustment subassembly sets up spanner spare and the locking piece in fossil fragments including the activity, the locking piece is used for cooperating with the supporting seat locking, spanner spare is used for supplying the people to control, and it can order about the locking piece activity, makes locking piece and supporting seat unblock.

It can be understood that above-mentioned technical scheme at first reforms transform the bracing piece of the traditional back of the chair into supporting seat and this kind of components of a whole that can function independently extending structure from top to bottom of fossil fragments, then sets up spanner spare and locking piece on fossil fragments, utilizes the locking piece to realize back subassembly height with the cooperation of supporting seat, and rethread spanner spare drives the locking piece activity, makes locking piece and supporting seat unblock, and then the lift adjustment of the back subassembly of being convenient for.

Furthermore, the wrench piece is rotatably arranged in the keel, one end of the wrench piece extends out of the keel for people to control, and the other end of the wrench piece is used for driving the locking piece to move.

It can be understood that in the above technical solution, the wrench member is built-in to be beneficial to maintaining the integral aesthetic property, and the wrench member extends out from the keel to be convenient for a user to operate.

Furthermore, the lifting adjusting assembly further comprises a first elastic piece, and the first elastic piece is used for providing reset elastic force for the wrench piece and keeping the wrench piece in a state that the locking piece is not driven to move when the wrench piece is not controlled by a person.

It can be understood that, in the above technical solution, the first elastic member has two functions, i.e. assisting the wrench member to reset, and keeping the wrench member in a state of not driving the locking member under normal conditions.

Furthermore, the locking piece rotates and sets up in fossil fragments, and one of them of locking piece and supporting seat sets up first buckle portion, and the slip direction of another person along fossil fragments sets up a plurality of second buckle portions that are used for with first buckle portion joint, and first buckle portion is through the joint with not co-altitude second buckle portion for fossil fragments are in different heights together with the back subassembly.

It can be understood that, in above-mentioned technical scheme, the locking piece embeds and is favorable to keeping holistic aesthetic property, and the high locking of back subassembly can be realized with the joint of second clamping part to first clamping part.

Furthermore, the first buckling part and the second buckling part are buckled through a concave-convex structure.

It can be understood that, in the technical scheme, the concave-convex structure is simple and easy to manufacture and produce.

Furthermore, the supporting seat is provided with a slot, the front side of the slot is provided with a first opening, the keel is inserted into the slot in a sliding mode, the front side of the keel shields the first opening, the first buckling part is arranged on the locking piece, and the second buckling part is arranged on the first opening.

Can understand, above-mentioned technical scheme further optimizes supporting seat and fossil fragments cooperation structure, makes the utility model discloses a structure is reasonable more, compact, be convenient for make.

Furthermore, the lifting adjusting assembly further comprises a second elastic piece, and the second elastic piece is used for providing reset elastic force for the locking piece and enabling the locking piece to be kept in a state of being locked and matched with the supporting seat when the locking piece is not driven by the wrench piece.

It can be understood that, in the above technical solution, the second elastic element has two functions, namely, the second elastic element helps the locking element to reset, and the second elastic element normally keeps the locking state with the supporting seat.

Further, the second elastic element is preferably a spring sheet.

It can be understood that the elastic sheet structure is adopted, so that the installation is convenient, the force is more uniform, the left and right displacement is not obvious, the hand feeling is better, and the gear adjustment is clearer.

Further, the lifting adjusting assembly further comprises a third elastic piece, and the third elastic piece is used for providing upward elastic force for the keel.

It can be understood, behind locking piece and supporting seat unblock, the fossil fragments can be moved down fast under the action of gravity after the meeting, is unfavorable for the operation of back subassembly lift adjustment like this, consequently the utility model discloses a third elastic component provides ascending thrust for fossil fragments, makes fossil fragments can not move down fast after locking piece and supporting seat unblock, and the user of being convenient for carries out the lift operation of back subassembly.

Further, the length of the key member is less than the length of the locking member.

It can be understood that the length of the wrench piece is different from that of the locking piece, and the torque is different, so that the wrench piece is stressed less and is easier to adjust.

Furthermore, the lifting adjusting assembly further comprises a wrench limiting part, wherein the wrench limiting part is used for limiting the wrench to limit the moving range of the wrench.

It can be understood that, in the above technical scheme, the spanner locating part can restrict the home range of spanner spare, makes spanner spare control more easily.

Furthermore, still cooperate on the fossil fragments to set up the waist and lean on, waist back and back subassembly can go up and down along with fossil fragments in step.

It can be understood that in the above technical scheme, the lumbar support is additionally arranged, and the lumbar support and the backrest assembly are both arranged on the keel, so that synchronous lifting of the lumbar support and the backrest assembly can be realized.

Further, the backrest assembly comprises a left backrest body and a right backrest body.

It will be appreciated that such an arrangement is a matter of routine choice in the art and will not be described in further detail.

The beneficial effects of the utility model are that:

1) the utility model adopts the structure of the wrench piece and the locking piece, and the locking piece can be driven to rotate when the wrench piece is adjusted in a rotating way, thereby realizing the gear adjustment;

2) the wrench part adopts a first elastic part, so that the wrench part can be quickly reset after being adjusted, the locking part adopts a second elastic part, and after the wrench part is loosened, the locking part can be independently reset for locking;

3) the length of the wrench piece is different from that of the locking piece, and the torque is different, so that the wrench piece is stressed less and is easier to adjust;

4) the utility model adopts the third elastic part to provide an upward resistance when the keel is downwards adjusted, so as to generate a damping sense, so that the backrest can be more smoothly adjusted, and the situation of sudden falling can not occur;

5) the third elastic piece adopts the shell fragment structure, the installation of being convenient for, and the dynamics is more even, controls the displacement unobvious, feels better, and it is more clear to adjust the gear.

6) The waist rest can synchronously lift along with the backrest assembly, and the requirements of different users can be met.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a second schematic structural diagram of the present invention;

FIG. 3 is an exploded view of the present invention;

fig. 4 is one of the schematic cross-sectional structural views before the height adjustment of the present invention, in which the locking member is in a locking state;

fig. 5 is a second schematic cross-sectional view of the present invention before height adjustment, wherein the locking member is in an unlocked state;

FIG. 6 is a schematic view of the cross-sectional structure of the utility model after height adjustment, wherein the locking member is in a locking state;

FIG. 7 is a schematic view of the connection structure of the wrench, the locking member and the second elastic member according to the present invention;

fig. 8 is a schematic view of the connection structure between the middle waist support fixing member and the third elastic member of the present invention.

Detailed Description

In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1-8, a seat backrest structure capable of being adjusted in a lifting manner includes a supporting seat 1, a keel 2 vertically slidably fitted on the supporting seat 1, a backrest module 3 disposed on the keel 2, and a lifting adjustment module, wherein the backrest module 3 includes a left backrest body and a right backrest body. Lifting adjusting subassembly sets up in spanner 4 and locking piece 5 of fossil fragments 2 including the activity, and locking piece 5 is used for cooperating with the locking of supporting seat 1, and spanner 4 is used for the people to control, and it can order about locking piece 5 activity, makes locking piece 5 and the unblock of supporting seat 1.

With continued reference to fig. 4-7, the lifting adjustment assembly further includes a first elastic member 6, wherein the first elastic member 6 is used to provide a restoring elastic force for the wrench member 4 and keep the wrench member 4 in a state of not driving the locking member 5 to move when not being controlled by a person.

Spanner 4 rotates through first pivot and sets up in fossil fragments 2 upper portion, it includes spanner control portion 400, spanner drive portion 401 and the spacing portion 402 of spanner, spanner control portion 400 and the spacing portion 402 of spanner are located one end, both constitute the V-arrangement structure, spanner drive portion 401 is located the other end, spanner control portion 400 stretches out from 2 upper portions front sides of fossil fragments, in order to supply the people to control, spanner drive portion 401 offsets with the upper end of locking piece 5, be used for driving locking piece 5 activity, 2 upper portions of fossil fragments still set up spanner locating part 12, this spanner locating part 12 is located between the V-arrangement structure that spanner control portion 400 and the spacing portion 402 of spanner constitute, spanner locating part 12 is used for spacing spanner 4, in order to limit spanner 4's rotation range.

When the wrench operation part 400 is not operated by a person, the wrench member 4 is rotated by the first elastic member 6 to a state where the wrench limiting part 402 abuts against the wrench limiting part 12; when the wrench operation part 400 is wrenched to the maximum angle by a person, the wrench member 4 rotates to a state where the wrench operation part 400 abuts against the wrench stopper 12.

In the present invention, the first elastic member 6 is preferably a torsion spring sleeved on the first rotating shaft. In addition, the first elastic element 6 may also be a spring, a spring plate, or the like.

An upper cover plate 11 is installed on the front side of the upper part of the keel 2, a second opening 1100 is formed in the upper cover plate 11, and the shape and size of the second opening 1100 are matched with those of the wrench operation part 400 so that the wrench operation part 400 can extend out.

Referring to fig. 3-7, the locking member 5 is rotatably disposed in the middle lower portion of the keel 2 through a second rotating shaft, the upper end of the locking member 5 is provided as a locking member driven portion 501, the locking member driven portion 501 abuts against the wrench driving portion 401, the lower end of the locking member 5 is provided as a first fastening portion 500, the first fastening portion 500 includes two upper and lower transverse protruding strips, and a groove is formed between the two transverse protruding strips.

The supporting seat 1 is provided with a slot 101, the front side of the slot 101 is provided with a first opening 102, two side edges of the first opening 102 are provided with a plurality of second buckling parts 100 at intervals along the sliding direction of the keel 2, the second buckling parts 100 are grooves, the continuous second buckling parts 100 form a rectangular wave structure, the keel 2 is inserted into the slot 101 in a sliding mode, the front side of the keel 2 is provided with a lower cover plate, the lower cover plate shields the first opening 102, and the first buckling parts 500 are clamped with the second buckling parts 100 with different heights so that the keel 2 and the backrest component 3 are located at different heights.

The upper part of the locking piece 5 is connected with a second elastic piece 7, the second elastic piece 7 is preferably a spring sheet, the front end of the second elastic piece 7 is abutted against the inner wall of the lower cover plate of the keel 2, and the second elastic piece 7 is used for providing resetting elasticity for the locking piece 5 and keeping the locking piece 5 in a state of locking and matching with the supporting seat 1 when not driven by the wrench piece 4.

In some embodiments, the second elastic sheet 7 may be a spring.

In some embodiments, the second elastic sheet 7 may be a torsion spring sleeved on the second rotating shaft.

In some embodiments, the positions of the first fastener 500 and the second fastener 100 can be interchanged.

It should be noted that the wrench member 4 and the locking member 5 may be connected directly, but may be connected by adding other transmission structures to achieve power transmission.

Moreover, the length of the wrench part 4 is smaller than that of the locking part 5, the length is different, the torque is different, and therefore the wrench part 4 is less stressed and is easier to adjust.

With continued reference to fig. 3-7, a lumbar support fixing member 10 is cooperatively installed in the keel 2, the lumbar support fixing member 10 is cooperatively connected with a lumbar support 9, the lumbar support 9 is located at the front side of the lower cover plate of the keel 2 and at the lower end of the backrest assembly 3, and the lumbar support 9 and the backrest assembly 3 can be lifted synchronously with the keel 2.

Wherein, the lower cover plate of the keel 2 is provided with a third opening 200, and the third opening 200 is used for connecting the lumbar support fixing part 10 and the lumbar support 9.

With continued reference to fig. 4-6, the lift adjustment assembly further includes a third elastic member 8, the third elastic member 8 is preferably a compression spring, the upper end of the third elastic member 8 is connected to the lumbar support fixture 10, the lower end of the third elastic member is mounted on the mounting tube on the inner wall of the support base 1, and the third elastic member 8 is used for providing an upward pushing force for the keel 2.

In some embodiments, the third elastic element 8 is connected directly to the keel 2 without passing through the lumbar support fixture 10.

In some embodiments, the third elastic element 8 is a tension spring, and the keel 2 is moved upwards by the tension force.

In some embodiments, the third elastic element 8 is a spring.

The working process comprises the following steps:

under normal conditions, the first buckling part 500 of the locking piece 5 is buckled with the second buckling part 100 of the supporting seat; when the height of the backrest component 3 needs to be adjusted, a user pulls the wrench control part 400 of the wrench part 4, the wrench part 4 drives the locking part 5 to rotate together, so that the first buckling part 500 is separated from the second buckling part 100, then the height of the backrest component 3 is adjusted, the wrench control part 400 is loosened after the adjustment is finished, the wrench part 4 resets under the action of the first elastic part 6, the locking part 5 resets under the action of the second elastic part 7, and the first buckling part 500 is clamped with the other second buckling part 100 again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides a liftable seat back structure of adjusting, its characterized in that, including supporting seat (1), upper and lower sliding fit fossil fragments (2) on supporting seat (1), set up back subassembly (3) and the lift adjustment subassembly on fossil fragments (2), the lift adjustment subassembly sets up spanner piece (4) and locking piece (5) in fossil fragments (2) including the activity, locking piece (5) are used for locking the cooperation with supporting seat (1), spanner piece (4) are used for supplying the people to control, and it can order about locking piece (5) activity, makes locking piece (5) and supporting seat (1) unblock.

2. The seat backrest structure capable of being adjusted up and down as claimed in claim 1, wherein the wrench member (4) is rotatably disposed in the keel (2), one end of the wrench member extends out of the keel (2) for being operated by a person, and the other end of the wrench member is used for driving the locking member (5) to move.

3. The seat back structure capable of being adjusted in a lifting manner as claimed in claim 1, wherein the lifting adjustment assembly further comprises a first elastic member (6), and the first elastic member (6) is used for providing a restoring elastic force for the wrench member (4).

4. The liftable seat backrest structure of claim 1, wherein the locking member (5) is rotatably disposed in the keel (2), one of the locking member (5) and the support base (1) is provided with a first buckling portion (500), the other one is provided with a plurality of second buckling portions (100) along the sliding direction of the keel (2) for being buckled with the first buckling portions (500), and the first buckling portions (500) are buckled with the second buckling portions (100) with different heights, so that the keel (2) and the backrest assembly (3) are located at different heights.

5. The seat backrest structure capable of being adjusted in a lifting manner as claimed in claim 4, wherein the first buckling part (500) and the second buckling part (100) are buckled through a concave-convex structure; the supporting seat (1) is provided with a slot (101), a first opening (102) is formed in the front side of the slot (101), the keel (2) is inserted into the slot (101) in a sliding mode, the front side of the keel (2) shields the first opening (102), the first buckling part (500) is arranged on the locking piece (5), and the second buckling part (100) is arranged on the first opening (102).

6. A liftable seat back structure according to any one of claims 1 to 5, wherein the lifting adjustment assembly further comprises a second resilient member (7), the second resilient member (7) is configured to provide a return resilient force to the locking member (5) and to maintain the locking member (5) in locking engagement with the support base (1) when the locking member (5) is not driven by the key member (4).

7. The liftable seat back structure of claim 6, wherein the second elastic member (7) is a spring.

8. A liftable seat back structure according to any of claims 1-5, wherein the lifting adjustment assembly further comprises a third elastic member (8), and the third elastic member (8) is used for providing upward elastic force for the keel (2).

9. A liftable seat back structure according to any one of claims 1 to 5, wherein the length of the key member (4) is smaller than the length of the locking member (5); the lifting adjusting assembly further comprises a wrench limiting part (12), wherein the wrench limiting part (12) is used for limiting the wrench part (4) so as to limit the moving range of the wrench part (4).

10. The liftable seat back structure of any one of claims 1 to 5, wherein a lumbar support (9) is further cooperatively arranged on the keel (2), and the lumbar support (9) and the back assembly (3) can be synchronously lifted along with the keel (2); the backrest component (3) comprises a left backrest body and a right backrest body.

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