CN212815345U - Seat and back of chair adjustable bracket thereof - Google Patents

Abstract

The utility model relates to a seat field especially relates to a seat and back of chair alignment jig thereof. A chair back adjusting frame is used for connecting a chair body and a backrest part, is provided with a locking telescopic mechanism, a supporting part arranged on the chair body, an adjusting part used for connecting and fixing the backrest part, and an adjusting bracket of which the upper end part and the lower end part are respectively pivoted with the adjusting part and the supporting part; the belt locking telescopic mechanism comprises a lockable spring piece, and two end parts of the lockable spring piece are respectively pivoted with the adjusting part and the supporting part; when the lockable spring piece contracts, one end of the adjusting bracket connected with the backrest part moves towards the direction approaching the seat body; when the lockable spring member is extended, the end of the adjustment bracket coupled to the back portion moves away from the seat body. A first object of the present invention is to provide a chair back adjusting bracket, which can be used to adjust the height and depth of the chair back quickly and conveniently.

Description

Seat and back of chair adjustable bracket thereof

Technical Field

The utility model relates to a seat field especially relates to a seat and back of chair alignment jig thereof.

Background

The learning chair is mainly a special chair for children to learn, and the chair for children of the type relatively pursues the adjustment of the sitting posture of the children, so that the height of the chair seat needs to be adjusted, and the back height and the seat depth need to be adjusted. At present, the back height adjustment and the seat depth adjustment of the study chair on the market are basically separated, the adjustment mode is complicated, the operation is not easy, and the chair is difficult to adjust to a proper position.

Chinese utility model patent publication No. CN201360777Y discloses a backrest rotation adjusting device for adjusting the height and seat depth of a sofa backrest. The backrest rotation adjusting device is provided with a fixing piece, a connecting piece, a rotation piece, an installation plate, a cover plate and a spring, wherein the fixing piece is connected with the connecting piece in a rotating mode, the spring is installed in the fixing piece, one end of the spring is fixedly connected with the fixing piece, the other end of the spring is fixedly connected with the connecting piece, a limiting pin is arranged between the connecting piece and the rotation piece and is connected with the connecting piece in a rotating mode, the installation plate is fixed on the rotation piece, and. The solution described in the above patent increases the height of the backrest in a particularly simple manner, while at the same time increasing the seat depth. But as described in the examples: the long pin is fixed on the connecting piece and can relatively rotate in a tooth groove C of a fixing piece of the fixing piece, when the long pin rotates clockwise over an inflection point E, the spring has the function of enabling the product to be in a locking state in figure 3, an angle alpha between the fixing piece and the fixing piece is 24 degrees in the locking state, and when the long pin rotates anticlockwise in the tooth groove C of the fixing piece and passes over the inflection point E, the spring has the function of enabling the product to be in an opening state in figure 4. That is, the backrest rotation adjusting device can be adjusted only in two states of the locking state and the opening state, and cannot be adapted to multi-level adjustment of the backrest height and the seat depth.

In addition, chinese patent No. CN208725228U discloses an adjustable buffering backrest device for a seat, which is used for connecting a seat body and a backrest part, and comprises a first connecting device and a first limiting device; two ends of the first connecting device are respectively movably connected with the seat body and the backrest part; one end of the first limiting device is connected with the first connecting device, and the other end of the first limiting device is connected with the seat body; when the first connecting device moves to a first position around the seat body, the first limiting device limits at least one part of the first connecting device to move towards the direction approaching the seat body. And because lack in this patent scheme and adjust spacing, so only can realize the buffering to human back support, and can't realize the regulation to back height and seat depth.

Disclosure of Invention

In order to solve the above problems, a first object of the present invention is to provide a chair back adjusting frame, which can be used to adjust the height and depth of the chair back quickly and conveniently. Moreover, the scheme controls and adjusts through the lockable spring piece, the adjusting flexibility is better, the locking can be realized at any position in the adjusting range, and the applicability is stronger.

A second object of the present invention is to provide a seat having the above-mentioned back-rest adjusting frame.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a back of chair alignment jig for connect seat body and back part, its characterized in that: the seat comprises a telescopic mechanism with a lock, a supporting part arranged on a seat body, an adjusting part used for connecting and fixing a backrest part, and an adjusting bracket with the upper end part and the lower end part respectively pivoted with the adjusting part and the supporting part;

the belt locking telescopic mechanism comprises a lockable spring piece, and two end parts of the lockable spring piece are respectively pivoted with the adjusting part and the supporting part;

when the lockable spring piece contracts, one end of the adjusting bracket connected with the backrest part moves towards the direction approaching the seat body;

when the lockable spring member is extended, the end of the adjustment bracket coupled to the back portion moves away from the seat body.

The above technical scheme is adopted in the utility model, this technical scheme relates to a back of the chair alignment jig, and this back of the chair alignment jig includes supporting part, adjustment portion and adjustment support. The adjusting part is used for connecting and fixing the backrest part, namely the backrest part is connected and fixed on the adjusting part; the supporting part is connected to the seat body and used as a bottom supporting frame of the chair back adjusting frame; the upper end part and the lower end part of the adjusting bracket are respectively pivoted with the adjusting part and the supporting part; the seat depth is adjusted by adjusting the height and the extending distance of the adjusting part and the backrest part on the adjusting part through the relative rotation of the two end parts of the adjusting bracket, the adjusting part and the supporting part. On the basis, the chair back adjusting frame further comprises a locking telescopic mechanism, wherein the lockable spring piece is used for adjusting the positions of the adjusting bracket relative to the adjusting part and the supporting part, and further adjusting the back height and the seat depth of the chair. When the back height and the seat depth need to be adjusted, a user needs to open the controller, and the controller opens the lockable spring part air valve through the linkage assembly; at the moment, the user applies external force on the adjusting bracket or the adjusting part, and the controller is closed after the external force is adjusted to a proper position, so that the back height and the seat depth are fixed.

Therefore, the chair back adjusting frame in the technical scheme can be used for quickly and conveniently adjusting the back height and the seat depth of the chair; compared with the prior art with the publication number of CN201360777Y, the scheme has the advantages that the spring piece can be locked to control and adjust, the adjustment flexibility is better, the locking can be realized at any position in the adjustment range, and the applicability is stronger.

Preferably, the adjusting bracket at least comprises two connecting pieces, two ends of which are respectively and independently pivoted with the adjusting part and the supporting part; the two connecting pieces and the pivot points of the two connecting pieces, the adjusting part and the supporting part form a four-bar structure; one end of each of the two end parts of the lockable spring part is coaxially pivoted with one end part of one connecting piece, and the other end of each of the two end parts of the lockable spring part is coaxially pivoted with the other end part of the other connecting piece. Among the above-mentioned technical scheme, the triangle-shaped adjustment mechanism that upper and lower tip and the upper and lower tip of connecting piece constitute about the lockable spring part adjusts the connecting piece angle rather than the coaxial pin joint of one end when the length variation of lockable spring part.

Preferably, the two connecting pieces form a cavity, and the belt locking telescopic mechanism is hidden in the cavity.

Preferably, the adjusting bracket further comprises a protective cover, the protective cover covers the two connecting pieces, one end of the protective cover is connected with the adjusting portion, and the other end of the protective cover is connected with the supporting portion. In this scheme, the safety cover blocks inside part, not only makes the product more pleasing to the eye, protects inside part moreover, avoids inside part to receive external force to damage on the one hand, and on the other hand also avoids the operator to press from both sides when using and hinder. The internal structure here comprises an adjustment bracket and a lockable spring element.

Preferably, the telescopic mechanism with locking further comprises a controller for controlling the locking or unlocking of the lockable spring member, and the controller is arranged on the adjusting part. As described in the above-mentioned description scheme, the controller opens the lockable spring element air valve through the linkage assembly; at this time, the user applies an external force to the adjusting bracket or the adjusting part. The controller is arranged on the adjusting part, so that when the controller is operated, force can be directly applied to the adjusting part, and single-hand operation can be realized.

Preferably, the telescopic mechanism with the lock further comprises a linkage assembly, and the controller controls the locking and unlocking of the telescopic mechanism with the lock through the linkage assembly; one end of the linkage component is connected with the trigger end of the lockable spring piece, and the other end of the linkage component is connected with the controller.

Preferably, the controller is arranged on the adjusting part in a limiting and rotating manner; the adjusting part is provided with a reset part which acts on the controller to drive the controller to rotate relative to the adjusting part and reset to a closed position. In the scheme, the telescopic mechanism with the lock comprises a lockable spring piece, a linkage assembly and a controller; wherein, the controller passes through the trigger end of interlock subassembly control lockable spring part, and then the locking or the unblock of control lockable spring part. The difference from the prior art is that the controller in the proposal is arranged on the adjusting part in a limiting rotation way, and the adjusting part is provided with a resetting part which acts on the controller. When the controller needs to be adjusted, a user can rotate the controller to an open position, the controller controls the lockable spring part air valve through the linkage assembly, and at the moment, the telescopic amount of the piston rod on the lockable spring part can be adjusted by means of external force; when the adjustment is completed, the controller can be directly released, and the controller rotates to reset to the closing position under the action of the resetting component. Therefore, the technical scheme of the utility model only need the user to open the controller when needs are adjusted, the closing of controller is realized through reset unit is automatic to simplify user operation, it is more convenient to use.

Preferably, the controller comprises a controller main body and a rotating arm connected to the controller main body; the rotating arm is connected to the adjusting part through a rotating shaft, and the controller can rotate along the rotating shaft in a limiting mode relative to the adjusting part by taking the rotating shaft as an axis. In the technical scheme, the controller comprises a controller main body and a rotating arm which are connected with each other, and the rotating arm is connected to the adjusting part through a rotating shaft. When the controller main body is acted by external force, the controller uses the rotating shaft as an axis and uses the rotating arm as a rotating radius to limit and rotate on the adjusting part.

Preferably, the adjusting part is at least provided with two blocking walls, and a movable area used for limiting the relative limiting rotation of the controller relative to the adjusting part is formed between the two blocking walls; the blocking wall is arranged on a rotating path of the controller main body and/or the rotating arm relative to the rotating shaft. In a specific scheme, an active area for limiting the limited rotation of a relative adjusting part of the controller is formed by two baffle walls; the controller main body is connected with the rotating arm, so the blocking wall is arranged on the rotating path of at least one of the controller main body and the rotating arm and is used for limiting the rotating range of the controller.

Preferably, the adjusting part comprises two side plates which are arranged oppositely, at least one section of circular arc edge is arranged on each side plate, and the rotating shaft is arranged on each side plate and is positioned at the circle center of the circular arc edge; the side plate is provided with a groove in a sector area corresponding to the arc-shaped edge of the section, and two side walls of the groove form the two retaining walls; the rotating arm of the controller is positioned in the groove of the side plate, and the controller main body is erected between the two side plates. According to the technical scheme, the controller uses the rotating shaft as an axis and the rotating arm as a rotating radius to limit and rotate on the adjusting part; thus, the rotational path of the controller is circular. In this case, the controller main body is erected between the two side plates, and the two side plates of the adjusting portion guide and position the controller, so that the side plates have at least one arc-shaped edge for fitting the rotation path of the controller. In addition, the rotating arm is arranged in the groove of the side plate, and the groove on the side plate limits the rotating range of the controller.

Preferably, the linkage assembly comprises a pull rope and a pull rope sleeve, the pull rope is arranged in the pull rope sleeve in a penetrating mode, and two ends of the pull rope extend out of the pull rope sleeve; the adjusting part is provided with a first mounting seat, the first end part of the pull rope sleeve is fixed on the first mounting seat, and the first end part of the pull rope is fixedly connected with the controller. A piston rod of the lockable spring part is connected with a second mounting seat, a pulling block is movably arranged in the second mounting seat, and the pulling block is connected with a trigger end of the lockable spring part; the second end of the pull rope sleeve is fixed on the second mounting seat, and the second end of the pull rope is connected with the pulling block. In the technical scheme, the linkage assembly comprises a pull rope and a pull rope sleeve; the first end part of the pull rope sleeve is fixed on the first mounting seat of the adjusting part, and when external force acts on the controller, the controller rotates relative to the adjusting part, so that the pull rope generates displacement relative to the pull rope sleeve; and further pulling a pulling block on the second mounting seat, thereby controlling and controlling the triggering end of the lockable spring part and further controlling the air valve switch of the lockable spring part.

A seat, characterized by: the chair back adjusting frame can be used for quickly and conveniently adjusting the back height and the seat depth of the chair.

Drawings

Fig. 1 is a schematic perspective view of a back adjuster bracket according to embodiment 1.

Fig. 2 is an exploded view of the structure of the chair back adjusting bracket.

Fig. 3 is a state diagram of the backrest part adjusted to a higher backrest height through the backrest adjusting frame.

Fig. 4 is a view showing the state that the backrest part is adjusted to a lower back height by the backrest adjusting frame.

Fig. 5 is a schematic structural view of the telescopic mechanism with lock.

Fig. 6 is an exploded view of the telescoping mechanism with lock.

Fig. 7 is a schematic view of the linkage assembly and the controller.

Fig. 8 is a perspective view of a seat in embodiment 2.

Fig. 9 is an exploded view of the seat in example 2.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1:

as shown in fig. 1 to 7, the present embodiment relates to a chair back adjusting frame, which includes a belt locking telescopic mechanism, a supporting portion 5 disposed on a chair body, an adjusting portion 6 for connecting and fixing a backrest portion 4, and an adjusting bracket having upper and lower end portions pivotally connected to the adjusting portion 6 and the supporting portion 5, respectively. The chair body comprises a chair seat 3 and a chair rod 2, and the supporting part 5 can be fixedly connected with the chair seat 3/the chair rod 2 or can be used as a part of the chair seat 3/the chair rod 2, namely, the supporting part and the chair rod are integrally connected.

The belt locking retracting mechanism includes a lockable spring member 71, a linkage assembly and a controller 72. The upper and lower ends of the lockable spring 71 are pivotally connected to the adjusting part 6 and the supporting part 5, respectively, and the positions of the adjusting bracket relative to the adjusting part 6 and the supporting part 5 are adjusted when the expansion and contraction amount of the piston rod 71a of the lockable spring 71 changes. Specifically, the lockable spring member 71 is an oil-pressure or air-pressure driven oil/gas spring, and in the present embodiment, a gas spring is used. When the lockable spring member 71 contracts, the end of the adjustment bracket connected to the backrest portion moves in a direction approaching the seat body; when the lockable spring member 71 is extended, the end of the adjustment bracket connected to the backrest portion moves away from the seat body.

One end of the linkage assembly is connected to the trigger end of the lockable spring 71, and the other end of the linkage assembly is connected to the controller 72. In the figure, the linkage assembly is a pull rope assembly, and includes a pull rope 73 and a pull rope sleeve 74, wherein the pull rope 73 is inserted into the pull rope sleeve 74, and both ends of the pull rope 73 extend out of the pull rope sleeve 74. The adjusting portion 6 is provided with a first mounting seat 61, a first end portion of the pull rope sleeve 74 is fixed to the first mounting seat 61, and a first end portion of the pull rope 73 is connected and fixed to the controller 72. The piston rod 71a of the lockable spring member 71 is connected to a second mounting seat 75, a pulling block 76 is movably disposed in the second mounting seat 75, and the pulling block 76 is connected to the trigger end of the lockable spring member 71. The second end of the pull rope sleeve 74 is fixed on the second mounting seat 75, and the second end of the pull rope 73 is connected with the trigger block 76. In this technical solution, the linkage assembly includes a pull rope 73 and a pull rope sleeve 74. A first end of the rope cover 74 is fixed to the first mounting seat 61 of the adjusting portion 6, and when an external force acts on the controller 72, the controller 72 moves relative to the adjusting portion 6, thereby displacing the rope 73 relative to the rope cover 74. Further pulling on the trigger block 76 of the second mounting seat 75 controls the trigger end of the lockable spring member 71, which in turn controls the opening and closing of the gas valve of the lockable spring member 71.

The technical scheme relates to a chair back adjusting frame which comprises a supporting part 5, an adjusting part 6 and an adjusting bracket. The adjusting part 6 is used for connecting and fixing the backrest part, namely the backrest part is connected and fixed on the adjusting part 6. The support part 5 is connected to the seat/chair rod as a bottom support for the back adjusting frame. The upper and lower ends of the adjusting bracket are respectively pivoted with the adjusting part 6 and the supporting part 5. The height and the extending distance of the adjusting part 6 and the backrest part thereon are adjusted by adjusting the relative rotation of the two end parts of the bracket, the adjusting part 6 and the supporting part 5, thereby adjusting the seat depth. On the basis, the chair back adjusting frame comprises a locking telescopic mechanism, wherein a lockable spring piece 71 is used for adjusting the position of the adjusting frame relative to the adjusting part 6 and the supporting part 5, and further adjusting the back height and the seat depth of the chair. When the back height and the seat depth need to be adjusted, a user needs to open the controller 72, and the controller 72 opens the lockable spring piece 71 air valve through the linkage assembly. At this time, the user applies an external force to the adjusting bracket or the adjusting portion 6, and closes the controller 72 after adjusting to a proper position, and the back height and the seat depth are also fixed.

Therefore, the chair back adjusting frame in the technical scheme can be used for quickly and conveniently adjusting the back height and the seat depth of the chair. Compared with the prior art with the publication number of CN201360777Y, the scheme controls and adjusts through the lockable spring piece 71, has better adjustment flexibility, can realize locking at any position in an adjustment range, and has stronger applicability.

On the basis of the technical scheme, the adjusting bracket at least comprises two connecting pieces with two end parts which are respectively and independently pivoted with the adjusting part 6 and the supporting part 5, and the two connecting pieces and the pivoting points of the two connecting pieces, the adjusting part and the supporting part form a four-bar structure; one end of the two end parts of the lockable spring part 71 is coaxially pivoted with one end part of one connecting piece, and the other end of the lockable spring part is coaxially pivoted with the other end part of the other connecting piece. In the above technical solution, the triangle adjusting mechanism formed by the upper and lower end portions of the lockable spring member 71 and the upper and lower end portions of the connecting member adjusts the angle of the connecting member coaxially pivoted with one end of the lockable spring member 71 when the length of the lockable spring member is changed. In the embodiment shown in fig. 2-4 in particular, the adjustment bracket includes an upper connecting member 81 and a lower connecting member 82, and the upper and lower ends of the lockable spring member 71 are pivotally connected coaxially with the upper end of the upper connecting member 81 and the lower end of the lower connecting member 82, respectively. The triangular adjusting mechanism is specifically shown in the figure, a hinge point of the upper end part of the lockable spring part 71 and the upper end part of the upper connecting part 81 which are coaxial is A, a hinge point of the lower end part of the lockable spring part 71 is B, and a hinge point of the lower end part of the lower connecting part 82 is C; wherein, B and C are fixed, so the distance between B and C is not changed, and the distance between A and C represents the length of the upper connecting piece 81 and is not changed; the spacing between a and B, which represents the overall length of lockable spring 71, changes, resulting in a change in the angle of lower attachment member 82 as the overall length of lockable spring 71, represented by a and B, changes. Similarly, in this figure, the lockable spring member 71 and the lower connecting member 82 also form the triangular adjustment mechanism described above. Based on the above solution, those skilled in the art can also pivot the upper and lower ends of the lockable spring member 71 coaxially with the upper end of the lower connecting member 82 and the lower end of the upper connecting member 81, respectively.

In addition, the chair back adjusting frame further comprises a protective cover 83, the protective cover 83 covers the adjusting support and the lockable spring piece 71, the upper end of the protective cover 83 is connected with the adjusting portion 6, and the lower end of the protective cover 83 is connected with the supporting portion 5. The protective cover 83 blocks the internal parts, so that the product is more attractive, the internal parts are protected, on one hand, the internal parts are prevented from being damaged by external force, and on the other hand, the internal parts are prevented from being damaged by clamping when an operator uses the protective cover. The internal structure here comprises an adjustment bracket and a lockable spring element. The protective cover 83 is required to be detachably provided; as shown in fig. 2, the protective cover 83 includes a lower cover 831, an upper cover 832 and two sidewalls 833, the lower cover 831 and the upper cover 832 can form a chamber for sealing the adjusting bracket and the lockable spring 71 by butting, and in this solution, the two sidewalls 833 can both connect the lower cover 831 and the upper cover 832, thereby realizing the butting of the lower cover 831 and the upper cover 832; the lower cover 831 and the upper cover 832 are directly butted, and the two side walls 833 can be omitted.

In a specific embodiment, the controller 72 is provided on the adjustment part 6. As described in the above-mentioned embodiments, the controller 72 opens the lockable spring member 71 air valve through the interlocking member. At this time, the user applies an external force to the adjusting bracket or the adjusting part 6. This embodiment has the controller 72 provided on the adjusting portion 6 so that when the controller 72 is operated, a force can be directly applied to the adjusting portion 6, thereby enabling one-handed operation. In a further preferred embodiment, the controller 72 is disposed on the adjusting part 6 for limiting the rotation. As shown in the drawing, the controller 72 includes a controller main body 721, and a rotating arm 722 attached to the controller main body 721. The rotating arm 722 is connected to the adjusting part 6 through a rotating shaft 723, and the controller 72 can rotate in a limited manner relative to the adjusting part 6 around the rotating shaft 723 as an axis. The adjusting part 6 is at least provided with two blocking walls 62, and a movable area for limiting the limited rotation of the controller 72 relative to the adjusting part 6 is formed between the two blocking walls 62. The blocking wall 62 is disposed on a rotation path of the controller main body 721 and/or the rotating arm 722 with respect to the rotating shaft 723. In this embodiment, the controller 72 specifically includes a controller main body 721 and a rotating arm 722 connected to each other, and the rotating arm 722 is connected to the adjusting unit 6 through a rotating shaft 723. When the controller main body 721 is acted on by an external force, the controller 72 is restricted and rotated in the adjusting section 6 about the rotation shaft 723 and the rotation arm 722 as a rotation radius. And this scheme forms an active area for restricting the limited rotation of the controller 72 with respect to the adjusting portion 6 by the two blocking walls 62. Since the controller main body 721 is connected to the rotating arm 722, the blocking wall 62 is provided at least in a rotating path of one of the controller main body 721 and the rotating arm 722 to limit a rotating range of the controller 72.

As further shown in the figure, the adjusting part 6 includes two side plates 63 disposed opposite to each other, the side plates 63 have at least one circular arc edge 63a, and the rotating shaft 723 is disposed on the side plates 63 and located at the center of the circular arc edge 63 a. The side plate 63 is provided with a groove 64 in a sector area corresponding to the arc-shaped edge 63a, and two side walls of the groove 64 form the two blocking walls 62. The rotating arm 722 of the controller 72 is positioned in the groove 64 of the side plate 63, and the controller main body 721 is erected between the two side plates 63. As described above, the controller 72 is restricted and rotated in the adjusting unit 6 with the rotating shaft 723 as the axis and the rotating arm 722 as the rotating radius. Therefore, the rotation path of the controller 72 is circular arc-shaped. In this case, the controller main body 721 is installed between the two side plates 63, and the two side plates 63 of the adjusting portion 6 guide and position the controller 72, so that the side plates 63 have at least one circular arc-shaped edge 63a for matching with the rotation path of the controller 72. In addition, the rotating arm 722 is located in the groove 64 of the side plate 63, and the groove 64 of the side plate 63 defines the rotating range of the controller 72.

In addition, the adjusting part 6 is provided with a reset part, and the reset part acts on the controller 72 to drive the controller 72 to rotate relative to the adjusting part 6 and reset to a closing position. The reset component is a reset torsion spring 65, the reset torsion spring 65 is sleeved on the rotating shaft 723, and two ends of the reset torsion spring 65 respectively abut against the adjusting part 6 and the rotating arm 722 of the controller 72. In this scheme, the area is locked telescopic machanism lockable spring piece 71, interlock subassembly and controller. The controller comprises an adjusting part 6 and a controller 72 arranged on the adjusting part 6, and when the pneumatic valve is used, the controller 72 controls the triggering end of the lockable spring part 71 through the linkage component, so that the pneumatic valve switch of the lockable spring part 71 is controlled. The difference from the prior art is that the controller 72 in this solution is arranged on the adjusting part 6 in a rotation-limiting manner, and the adjusting part 6 is provided with a resetting part acting on the controller 72. When the adjustment is needed, the user can rotate the controller 72 to the open position, the controller 72 controls the air valve of the lockable spring member 71 through the linkage assembly, and at this time, the expansion amount of the piston rod 71a on the lockable spring member 71 can be adjusted by means of external force. When the adjustment is completed, the control 72 can be released directly, and the control 72 is rotated to return to the closed position by the return member. Therefore, the technical scheme of the utility model only need the user to open controller 72 when needs are adjusted, closing of controller 72 is realized through reset unit is automatic to simplify user operation, it is more convenient to use.

Example 2:

as shown in fig. 8 and 9, the present embodiment relates to a chair, which includes chair legs 1, a chair rod 2 disposed on the chair legs 1, a chair seat 3 and a chair back adjusting frame disposed on the chair rod 2, and a backrest portion 4 connected to the chair back adjusting frame. Wherein the backrest part 4 adjusting bracket is a backrest adjusting bracket as shown in embodiment 1, which can be used to quickly and conveniently adjust the back height and seat depth of the seat. As shown in the figure, the chair is a double-back chair, and two connecting ends are provided on the adjusting part 6 of the chair back adjusting frame, and are respectively used for connecting the two backrest parts 4.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (10)

1. The utility model provides a back of chair alignment jig for connect seat body and back part, its characterized in that: a telescopic mechanism with locking, a supporting part (5) arranged on the seat body, an adjusting part (6) used for connecting and fixing the backrest part (4), and an adjusting bracket with the upper end and the lower end respectively pivoted with the adjusting part (6) and the supporting part (5);

the belt locking telescopic mechanism comprises a lockable spring piece (71), and two end parts of the lockable spring piece (71) are respectively pivoted with the adjusting part (6) and the supporting part (5);

when the lockable spring member (71) contracts, one end of the adjusting bracket connected with the backrest part moves towards the direction approaching the seat body;

when the lockable spring member (71) is extended, the end of the adjustment bracket connected to the backrest portion moves away from the seat body.

2. The chair back adjusting bracket of claim 1, wherein: the adjusting bracket at least comprises two connecting pieces, two ends of which are respectively and independently pivoted with the adjusting part (6) and the supporting part (5); the two connecting pieces and the pivot points of the two connecting pieces, the adjusting part (6) and the supporting part (5) form a four-bar structure; one end of each of two end parts of the lockable spring piece (71) is coaxially pivoted with one end part of one connecting piece, and the other end of each of the two end parts of the lockable spring piece is coaxially pivoted with the other end part of the other connecting piece.

3. The chair back adjusting bracket of claim 2, wherein: the two connecting pieces form a cavity, and the belt locking telescopic mechanism is hidden in the cavity.

4. The chair back adjusting bracket of claim 2, wherein: the adjusting bracket further comprises a protective cover (83), the protective cover (83) is coated outside the two connecting pieces, one end of the protective cover (83) is connected with the adjusting part (6), and the other end of the protective cover (83) is connected with the supporting part (5).

5. The chair back adjusting bracket of claim 1, wherein: the telescopic mechanism with the locking function further comprises a controller (72) used for controlling the locking or unlocking of the lockable spring piece (71), and the controller (72) is arranged on the adjusting part (6).

6. The chair back adjusting bracket of claim 5, wherein: the telescopic mechanism with the lock further comprises a linkage assembly, and the controller (72) controls the telescopic mechanism with the lock to be locked and unlocked through the linkage assembly; one end of the linkage component is connected with the trigger end of the lockable spring piece (71), and the other end of the linkage component is connected with the controller (72).

7. The chair back adjusting bracket of claim 5, wherein: the controller (72) is arranged on the adjusting part (6) in a limiting and rotating manner; the adjusting part (6) is provided with a resetting part, and the resetting part acts on the controller (72) to drive the controller (72) to rotate relative to the adjusting part (6) and reset to a closing position.

8. The chair back adjustment bracket of claim 7, wherein: the controller (72) comprises a controller (72) main body (721) and a rotating arm (722) connected to the controller (72) main body (721); the rotating arm (722) is connected to the adjusting part (6) through a rotating shaft (723), and the controller (72) can rotate in a limiting mode relative to the adjusting part (6) along the rotating shaft (723) as an axis.

9. The chair back adjustment bracket of claim 8, wherein: the adjusting part (6) is at least provided with two retaining walls (62), and a movable area for limiting the limiting rotation of the controller (72) relative to the adjusting part (6) is formed between the two retaining walls (62); the blocking wall (62) is arranged on a rotating path of the main body (721) and/or the rotating arm (722) of the controller (72) relative to the rotating shaft (723).

10. A seat, characterized by: comprising a chair back adjustment bracket as defined in any one of claims 1-9.

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