CN219962340U - Chair and sliding chair back thereof - Google Patents

Abstract

The utility model relates to the field of seats, in particular to a seat and a sliding seat back thereof. A sliding chair back comprises a chair back support frame with the lower end part connected to a tilting tray and a chair back framework longitudinally sliding and arranged on the front end part of the chair back support frame through a sliding back assembly; the slide back assembly comprises a slide base; the front end face of the sliding base is in sliding connection with the rear end of the chair back framework, or the rear end face of the sliding base is in sliding connection with the front end of the chair back support frame, then the chair back framework can automatically reset under the condition that external force is removed after the chair back framework slides relatively, an elastic reset piece is required to be arranged, and the elastic reset piece can prop up the chair back framework upwards. The sliding chair back has the advantages that the sliding back function of the chair is reserved, the chair back support frame and the chair back framework are allowed to be split into boxes through the sliding base on the basis of avoiding relative movement between a human body and the chair back, so that packaging and storage boxing spaces are saved, and transportation cost is reduced.

Description

Chair and sliding chair back thereof

Technical Field

The utility model relates to the field of seats, in particular to a seat and a sliding seat back thereof.

Background

In the existing office chair, a backrest is usually formed by connecting a backrest and a backrest support frame, wherein the backrest is used for arranging mesh cloth or leather cloth and is a part for directly supporting the back of a human body; the chair back frame is used for connecting the chair chassis and the chair back, and effectively fixing the chair back. In addition, in order to improve comfort, a hinged mode exists between the chair back and the chair back frame of a part of the chairs, so that the chair back can relatively rotate relative to the chair back frame. The existing connection mode between the chair back and the chair back frame has the following defects: when the back of the user leans against the backrest, if the user leans backwards with force, the back of the human body can slide downwards relative to the backrest, and meanwhile, the relative motion between the human body and the backrest can lead the clothes of the user to be pulled up, so that uncomfortable feeling is brought.

In the prior art, for example, in the chinese patent publication No. CN 212938941U, a backrest structure of an office chair is described, which includes a backrest frame, and an elastic restoring member, wherein the backrest frame is mounted on the backrest frame and can slide up and down relative to the backrest frame, the elastic restoring member is disposed along a sliding direction of the backrest frame, and one end of the elastic restoring member is connected with the backrest frame, and the other end of the elastic restoring member is connected with the backrest frame. The effect of this scheme is: when a user leans backwards, the backrest frame is stressed to slide downwards, soft and comfortable backrest effect is provided for the user under the buffer action of the elastic reset piece, and the stress pressure of the backrest frame seat can be reduced to a certain extent.

The above prior art has solved the problem of relative movement between the human body and the back of the chair in the back recline process. However, in the prior patent, due to the arrangement of the sliding back structure, the back frame seat, the back frame and the elastic reset piece are required to be assembled when leaving the factory, and are difficult to be installed by a consumer. Thus, the problems of larger space for packaging, storing and boxing the chair back and higher transportation cost can be caused; this has a very significant cost impact for furniture enterprises that export overseas markets, and thus needs improvement.

Disclosure of Invention

In order to solve the above problems, a first object of the present utility model is to provide a sliding chair back, which can save packaging and storage and boxing space and reduce transportation cost by providing a sliding base to allow a chair back support and a chair back frame to be boxed separately on the basis of keeping the sliding back function of the chair and avoiding relative movement between a human body and the chair back.

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

a sliding chair back comprises a chair back support frame with the lower end part connected to a tilting tray and a chair back framework longitudinally sliding and arranged on the front end part of the chair back support frame through a sliding back assembly; the method is characterized in that: the slide back assembly comprises a slide base;

the back end of the chair back framework is arranged on the sliding base in a sliding way and is connected with an elastic resetting piece arranged along the sliding direction, the end face of the back side of the sliding base is detachably and fixedly connected with the front end of the chair back support frame, and the elastic force of the elastic resetting piece upwards props up the chair back framework;

or the front end of the chair back support frame is arranged on the sliding base in a sliding way and is connected with an elastic resetting piece arranged along the sliding direction, and the front end face of the sliding base is detachably and fixedly connected with the rear end of the chair back framework; the elastic force of the elastic resetting piece upwards supports the sliding base and the chair back framework.

According to the technical scheme, the chair back support frame in the sliding chair back is used for being installed on the tilting tray, the chair back framework is longitudinally arranged on the front end portion of the chair back support frame in a sliding mode through the sliding back assembly, and the chair back framework is a support surface for supporting the back of a human body through mesh cloth, cloth or leather. Under the riding state, in the backward dumping process of the chair back, the chair back framework slides relative to the chair back supporting frame through the sliding back assembly, so that the relative movement between a human body and the chair back can be avoided, and the use comfort level is improved.

On the basis, compared with the technical scheme in the background art, the sliding base is added to the sliding back assembly in the scheme, and the sliding base is used as an installation transition piece between the chair back support frame and the chair back framework. In this scheme, sliding base's preceding terminal surface and back of the chair skeleton rear end sliding connection, perhaps sliding base's rear end face and back of the chair support frame front end sliding connection, then can automatic re-setting in order to make back of the chair skeleton take place the circumstances of external force removal behind the relative slip, need set up the elasticity piece that resets, the elasticity piece that resets can upwards prop up back of the chair skeleton.

Under this structure, can be when dispatching from the factory with the back of the chair support frame or the back of the chair skeleton of slip back subassembly and its sliding connection be assembled, and with the position reservation that the opposite side can dismantle the rigid coupling for the user installs by oneself. So, this scheme is on the smooth back function that has kept the seat, avoids on the basis of relative motion between human body and the back of the chair, allows back of the chair support frame and the split type vanning of back of the chair skeleton through setting up slide base to save packing, storage vanning space, reduce cost of transportation.

In a further preferred scheme, a sliding rail, a sliding groove or a sliding rod which is longitudinally arranged is constructed on the sliding base, and the rear end of the chair back framework or the front end of the chair back support frame is arranged on the sliding rail, the sliding groove or the sliding rod; the elastic resetting piece is a tension spring or a compression spring arranged along the longitudinal direction. In this scheme, a sliding rail, a sliding groove or a sliding rod can be constructed on the sliding base, the sliding rail is generally a track which is attached to the sliding base and protrudes to one side, the sliding groove is generally a groove outlined on the sliding base, and the sliding rod is generally an optical axis which is vertically arranged on the sliding base; the back end of the chair back framework or the front end of the chair back supporting frame is arranged on the sliding rail, the sliding groove or the sliding rod to realize relative sliding immediately. Further, the chair back framework can be automatically reset under the condition that external force is removed after the chair back framework slides relatively through the tension of the tension spring or the elastic force of the pressure spring.

In the specific embodiment, the sliding rod is adopted, in particular to a mounting seat of which the longitudinal two ends of the sliding base face to the front side or the rear side of the sliding base, and the sliding rod is positioned and mounted on the mounting seats of the two ends of the sliding base; the back of the chair skeleton rear end or back of the chair support frame front end is provided with the slip cap that the activity cup joints on the slide bar, and the elasticity resets and is the extension spring or the pressure spring that the cover was located on the slide bar between two mount pads. In this scheme, the slide bar passes through the mount pad at slide base both ends and realizes the location, and back of the chair skeleton rear end or back of the chair support frame front end adopt movable sleeve to cup joint on the slide bar, on this basis, can locate extension spring or pressure spring cover on the slide bar between two mount pads, the slide bar plays direction and supporting role to extension spring or pressure spring to can avoid extension spring or pressure spring to produce distortion and deformation in deformation process.

In a further preferred scheme, at least one end of the sliding rod penetrates through the mounting seat on one side of the sliding rod, at least two sliding sleeves are sleeved on the same sliding rod at the rear end of the chair back framework or the front end of the chair back support frame, one sliding sleeve is positioned on the sliding rod between the two mounting seats, and the other sliding sleeve is positioned on the extending part of the sliding rod; the two sliding sleeves synchronously slide along the sliding rod and reach the highest position at the same time. In this scheme, consider the stability of back of the chair skeleton or back of the chair support frame sliding connection department, this scheme is provided with two at least slip cap and connects on same slide bar, so can avoid back of the chair skeleton or back of the chair support frame to use only one slip cap as the supporting point, takes place to twist and warp.

On the basis, in order to avoid the interference of sliding travel by two or more sliding sleeves, the proposal further leads at least one end of the sliding rod to pass through the mounting seat on one side of the sliding rod, and the other sliding sleeve is positioned on the extending part of the sliding rod. Therefore, when the two sliding sleeves synchronously move, the sliding sleeve on the extending part does not occupy the sliding rod between the two mounting seats, so that the length of the sliding stroke is not influenced.

In another expandable scheme, the sliding back assembly further comprises a base plate, wherein the base plate is arranged on the sliding base in a sliding manner and is connected by an elastic reset piece; the base plate and the sliding base are respectively and detachably fixedly connected to the front end of the chair back support frame and the rear end of the chair back framework. In this scheme, the back of the body subassembly is provided with the base plate in addition to the slide base, and the base plate slides and sets up on the slide base and is connected by elastic return piece.

The scheme can be understood that on the basis of the scheme, the rear end of the chair back framework or the front end of the chair back support frame is indirectly connected with the sliding base through the base plate. By adopting the scheme, the sliding back assembly can be used as an independent component for boxing and transportation, and the base plate and the sliding base are respectively fixedly connected with the front end of the chair back support frame and the rear end of the chair back framework during assembly by a user, so that the installation is also more convenient.

Preferably, a decorative clamping groove is formed in the rear end face of the chair back support frame, and the rear end face of the sliding base is detachably and fixedly connected to the front end of the chair back support frame by adopting a screw-fixing part arranged in the decorative clamping groove; a decorative panel is embedded in the decorative clamping groove of the chair back support frame; the decoration panel covers and conceals the decoration clamping groove. In this scheme, the embedded draw-in groove that forms of rear end face of back of chair support frame, assembled based on installing the spiral shell solid part in decorating the draw-in groove and screw up fixed sliding base, with decoration panel lid close on decorating the draw-in groove after the installation to play the effect of hiding junction and connection structure.

In a specific embodiment, the chair back framework comprises a beam plate connected with the sliding back assembly and a framework main body arranged on the beam plate; the framework main body is provided with a chair back supporting surface.

In a further additional scheme, a waist rest component is connected to the beam plate below the framework main body; based on the arrangement of the lumbar support assembly, support may be provided to the lumbar of the user. In a specific embodiment of the present utility model,

a gear adjusting piece is arranged in the beam plate below the framework main body,

the left side and the right side of the gear adjusting piece are spatially distributed and are provided with a gear feeding chute and a gear withdrawing chute, and the upper end and the lower end of the gear adjusting piece are provided with connecting grooves communicated with the gear feeding chute and the gear withdrawing chute;

the gear adjusting piece comprises a retaining wall which is longitudinally arranged, and a plurality of stages of gear teeth which face one side of the gear feeding chute are longitudinally formed on one side of the retaining wall, wherein the tooth wall of the gear teeth comprises a guide wall which is inclined obliquely upwards, and clamping plates on the top of the guide wall and the retaining wall on the inner side of the guide wall; the clamping plate is constructed into an arc-shaped plate with a sunk middle part or inner end, and a deformation space for extrusion deformation of the guide wall is formed among the clamping plate, the guide wall and the clamping plate;

the rear end part of the waist rest component is longitudinally arranged on the beam plate in a sliding way, and a gear clamping rod is arranged on the gear adjusting piece in a movable way.

Under the structure, the waist rest component can be lifted up step by step and positioned on any gear tooth for positioning in the process of longitudinally sliding along the gear-feeding sliding groove relative to the beam plate, so that the height adjustment of the waist rest component is completed. In the adjusting process, the gear clamping rod of the lumbar support assembly is extruded to force the guide wall of the gear tooth above to deform so as to be lifted to the gear tooth of the upper stage, and the clamping plate in the gear tooth can position and support the gear clamping rod and the lumbar support assembly connected with the gear clamping rod under the condition of removing external force.

After the gear clamping rod is adjusted to the gear tooth with the highest position, the waist support component is lifted upwards continuously, and the gear clamping rod enters the gear withdrawal chute through the connecting groove, so that the gear can be adjusted to the lowest position.

In a further preferred aspect, the lumbar support assembly includes a lumbar support base, and a lumbar support body rotatably disposed on the lumbar support base; the waist support base is internally provided with an elastic piece which props against the waist support body. In this scheme, the waist is leaned on the body and is adopted elasticity and rotate to set up on the waist is leaned on the base, and the laminating user waist that can be better when taking. The elastic support also provides better back feel and cushioning feel under the leaning state.

In a further additional scheme, the upper end of the beam plate or the framework main body is provided with a headrest assembly, and the headrest assembly comprises a headrest base fixedly connected to the beam plate or the framework main body and a headrest body rotatably arranged on the headrest base; in this arrangement, head support is provided to the user based on the arrangement of the headrest assembly.

In the specific scheme, a headrest sliding groove which is longitudinally arranged is constructed on the headrest body, a sliding seat is arranged in the headrest sliding groove, and the sliding seat can be adjusted up and down along the headrest sliding groove relative to the headrest body; the two ends of the sliding seat extend out of the headrest sliding groove, and the two ends of the sliding seat are in limit rotation connection with the headrest base.

In this scheme, can adjust from top to bottom along the headrest spout for the headrest body based on the sliding seat, can realize the vertical height adjustment of headrest body to the user of being adapted to different heights uses. The sliding seat is rotationally connected with the headrest body, so that the angle can be adjusted adaptively in the process of leaning on the headrest, and the headrest is suitable for different riding postures.

A second object of the present utility model is to provide a seat, characterized in that: comprising the sliding chair back.

Drawings

Fig. 1 is a schematic view of a sliding chair back according to embodiment 1.

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

Fig. 3 is a schematic structural view of the slide back assembly.

Figure 4 is a schematic view of an arrangement of the lumbar support assembly.

Figure 5 is an exploded view of the lumbar support assembly.

Fig. 6 is a schematic structural view of the shift position adjusting member.

Figure 7 is an exploded view of the rotational structure of the lumbar support assembly.

Fig. 8 is a front perspective exploded view of the headrest assembly.

Fig. 9 is a rear side angular resolution of the headrest assembly.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

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

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Example 1:

as shown in fig. 1 to 9, the present embodiment relates to a sliding chair back, comprising a chair back support frame 1 with a lower end connected to a tilting tray, and a chair back frame 2 longitudinally slidably disposed on a front end of the chair back support frame 1 by a sliding back assembly 3; the chair back support frame 1 in the sliding chair back is used for being installed on a tilting tray, the chair back framework 2 is longitudinally arranged on the front end part of the chair back support frame 1 in a sliding mode through the sliding back assembly 3, and the chair back framework 2 adopts mesh cloth, cloth or leather to construct a support surface for supporting the back of a human body. Under the riding state, in the backward dumping process of the chair back, the chair back framework 2 slides relative to the chair back support frame 1 through the sliding back assembly 3, so that the relative movement between a human body and the chair back can be avoided, and the use comfort level is improved.

On the basis, compared with the technical scheme in the background art, the sliding base 31 is added to the sliding back assembly 3 in the scheme, and the sliding base 31 is used as an installation transition piece between the chair back support frame 1 and the chair back framework 2. Specifically, one of the following two schemes can be adopted:

the first scheme is that the back end of the chair back frame 2 is slidably arranged on the sliding base 31 and is connected with an elastic reset piece 32 arranged along the sliding direction, the back end surface of the sliding base 31 is detachably and fixedly connected with the front end of the chair back support frame 1, and the elastic force of the elastic reset piece 32 upwards props up the chair back frame 2; the drawings and the present embodiment are mainly described in this technical scheme.

The second scheme is that the front end of the chair back support frame 1 is arranged on the sliding base 31 in a sliding way and is connected with an elastic reset piece 32 arranged along the sliding direction, and the front end face of the sliding base 31 is detachably and fixedly connected with the rear end of the chair back framework 2; the elastic force of the elastic restoring member 32 pushes up the sliding base 31 and the seatback frame 2.

In the above-mentioned scheme, the front end face of slide base 31 and back of the chair skeleton 2 rear end sliding connection, perhaps the rear end face of slide base 31 and back of the chair support frame 1 front end sliding connection, then in order to make back of the chair skeleton 2 take place the relative slip and remove under the circumstances of external force and can automatic re-setting, need set up elasticity reset piece 32, elasticity reset piece 32 can upwards prop up back of the chair skeleton 2. Under this structure, can be when dispatching from the factory with the back of the chair support frame 1 or the back of the chair skeleton 2 of its sliding connection with slip back of the body subassembly 3, and can dismantle the fixed position reservation for the user to install by oneself with the opposite side. So, this scheme is on the smooth back function that has kept the seat, avoids on the basis of the relative motion between human body and the back of the chair, through setting up slide base 31 and allow the split type vanning of back of the chair support frame 1 and back of the chair skeleton 2 to save packing, storage vanning space, reduce cost of transportation.

In a further preferred embodiment, the sliding base 31 is configured with a sliding rail, a sliding groove or a sliding rod 33 that is longitudinally arranged, and the rear end of the chair back frame 2 or the front end of the chair back support frame 1 is arranged on the sliding rail, the sliding groove or the sliding rod 33; the elastic restoring member 32 is a tension spring or a compression spring provided in the longitudinal direction. In this solution, a sliding rail, a sliding groove or a sliding rod 33 may be constructed on the sliding base 31, where the sliding rail is generally a track that is attached to the sliding base 31 and protrudes to one side, the sliding groove is generally a groove outlined on the sliding base 31, and the sliding rod 33 is generally an optical axis that is erected on the sliding base 31; the back end of the chair back framework 2 or the front end of the chair back supporting frame 1 is arranged on a sliding rail, a sliding groove or a sliding rod 33 to realize relative sliding instantly. Further, the chair back framework 2 can be automatically reset under the condition that external force is removed after the chair back framework slides relatively through the tension of the tension spring or the elasticity of the pressure spring.

In the embodiment shown in fig. 2 and 3, an embodiment of a slide bar 33 is adopted, specifically, the mounting seats 34 of the two longitudinal ends of the sliding base 31 to the front side or the rear side thereof, and the slide bar 33 is positioned and mounted on the mounting seats 34 of the two ends of the sliding base 31; the back end of the chair back framework 2 or the front end of the chair back support frame 1 is provided with a sliding sleeve 35 movably sleeved on the sliding rod 33, and the elastic resetting piece 32 is a tension spring or a compression spring sleeved on the sliding rod 33 between the two mounting seats 34. In this scheme, slide bar 33 realizes the location through the mount pad 34 at slide base 31 both ends, and back of the chair skeleton 2 rear end or back of the chair support frame 1 front end adopts movable sleeve to cup joint on slide bar 33, on this basis, can locate extension spring or pressure spring cover on the slide bar 33 between two mount pads 34, slide bar 33 plays direction and support effect to extension spring or pressure spring to can avoid extension spring or pressure spring to produce distortion and deformation in the deformation process.

At least one end of the sliding rod 33 passes through the mounting seat 34 on one side of the sliding rod 33, at least two sliding sleeves 35 are sleeved on the same sliding rod 33 at the rear end of the chair back framework 2 or the front end of the chair back support frame 1, one sliding sleeve 35 is positioned on the sliding rod 33 between the two mounting seats 34, and the other sliding sleeve 35 is positioned on the extending part 331 of the sliding rod 33; the two slide shoes 35 slide synchronously along the slide bar 33 and reach the highest position at the same time. In this scheme, considering the stability of back skeleton 2 or back support frame 1 sliding connection department, this scheme is provided with two at least slip cap 35 and connects on same slide bar 33, so can avoid back skeleton 2 or back support frame 1 to use only a slip cap 35 as the supporting point, takes place to twist and warp. On the basis of this, in order to avoid the interference of the sliding stroke by the provision of two or more sliding sleeves 35, this solution further provides for at least one end of the sliding rod 33 to be passed out of the mounting seat 34 on one side thereof, the other sliding sleeve 35 being located on the extension 331 of the sliding rod 33. Thus, when the two sliding sleeves 35 move synchronously, the sliding sleeve 35 on the extending part 331 does not occupy the sliding rod 33 between the two mounting seats 34, so that the length of the sliding stroke is not influenced.

In a third expandable aspect, the sliding back assembly 3 further includes a base plate slidably disposed on the sliding base 31 and connected by the elastic restoring member 32; the base plate and the sliding base 31 are respectively and detachably fixedly connected to the front end of the chair back support frame 1 and the rear end of the chair back framework 2. In this solution, the slide back assembly 3 is provided with a base plate in addition to the slide base 31, which is slidingly arranged on the slide base 31 and connected by an elastic return 32. In this scheme, it can be understood that, on the basis of the above, the rear end of the back frame 2 or the front end of the back support frame 1 is indirectly connected with the sliding base 31 by a base plate. By adopting the scheme, the sliding back assembly 3 can be used as an independent component for boxing and transportation, and the base plate and the sliding base 31 are fixedly connected to the front end of the chair back support frame 1 and the rear end of the chair back framework 2 respectively during assembly by a user, so that the installation is also convenient.

On the basis of the first implementation mode, the technical proposal is that a decorative clamping groove 11 is constructed on the rear end face of the chair back support frame 1, and the rear end face of a sliding base 31 is detachably and fixedly connected at the front end of the chair back support frame 1 by adopting a screw-fixing component (such as a bolt) arranged in the decorative clamping groove 11; a decorative panel 12 is embedded in the decorative clamping groove 11 of the chair back support frame 1; the decorative panel 12 covers and conceals the decorative card slot 11. In this scheme, the back terminal surface of back of the chair support frame 1 is embedded to form and decorates draw-in groove 11, and assembled is based on installing the spiral shell in decorating draw-in groove 11 and is screwed up fixed slide base 31, and the decoration panel 12 lid closes on decorating draw-in groove 11 after the installation to play the effect of hiding junction and connection structure.

In a specific embodiment, the chair back frame 2 comprises a beam plate 21 connected with the sliding back assembly 3, and a frame main body 22 mounted on the beam plate 21; the frame body 22 is constructed with a back support surface, such as a back support surface formed of mesh, cloth or leather.

In a further additional aspect shown in fig. 4-7, the lumbar support assembly 4 is connected to the beam plate 21 below the skeleton main body 22; based on the arrangement of the lumbar support assembly 4, support may be provided to the lumbar of the user. In a specific embodiment of the present utility model,

a gear adjusting piece 23 is arranged in the beam plate 21 below the framework main body 22,

the left side and the right side of the gear adjusting piece 23 are provided with a gear feeding chute 241 and a gear withdrawing chute 242 in a spatial distribution manner, and the upper end and the lower end of the gear adjusting piece 23 are provided with a connecting groove 243 communicated with the gear feeding chute 241 and the gear withdrawing chute 242;

the gear adjusting member 23 comprises a retaining wall 231 longitudinally arranged, and a plurality of stages of gear teeth 232 which face to one side of the gear feeding sliding groove 241 are longitudinally formed on one side of the retaining wall 231, wherein the tooth wall of the gear teeth 232 comprises a guide wall 233 which is inclined obliquely upwards, and a clamping plate 234 on the top of the guide wall 233 and the inner retaining wall 231; the clamping plate 234 is constructed as an arc plate with a sunk middle or inner end, and a deformation space 235 for the guide wall 233 to squeeze and deform is formed among the clamping plate 234, the guide wall 233 and the clamping plate 234;

the rear end of the lumbar support assembly 4 is longitudinally and slidably arranged on the beam plate 21 and is provided with a gear clamping rod 411 which moves on the gear adjusting piece 23.

With the above structure, the lumbar support assembly 4 can be lifted up step by step and positioned on any gear tooth 232 for positioning in the process of longitudinally sliding along the gear-feeding chute 241 relative to the beam plate 21, thereby completing the height adjustment of the lumbar support assembly 4. During the adjustment process, the gear clamping rod 411 of the lumbar support assembly 4 is pressed to force the guide wall 233 of the gear tooth 232 above to deform so as to lift onto the gear tooth 232 of the upper stage, and the clamping plate 234 in the gear tooth 232 can position and support the gear clamping rod 411 and the lumbar support assembly 4 connected with the gear clamping rod 411 under the condition of removing the external force. After the gear clamping rod 411 is adjusted to the highest-position gear tooth 232, the lumbar support assembly 4 is lifted upwards continuously, and the gear clamping rod 411 enters the gear withdrawing chute 242 through the connecting groove 243, so that the gear clamping rod can be adjusted to the lowest gear.

In a further preferred embodiment, the lumbar support assembly 4 includes a lumbar support base 41, and a lumbar support body 42 rotatably disposed on the lumbar support base 41; the waist support base 41 is internally provided with an elastic piece which props against the waist support body 42. In this embodiment, the lumbar support body 42 is elastically and rotatably provided on the lumbar support base 41, and can be attached to the waist of the user even better when riding. The elastic support also provides better back feel and cushioning feel under the leaning state.

In a further additional aspect shown in fig. 8 and 9, the upper end of the beam plate 21 or the skeleton main body 22 is provided with a headrest assembly 5, and the headrest assembly 5 includes a headrest base 51 fixedly connected to the beam plate 21 or the skeleton main body 22, and a headrest body 52 rotatably provided on the headrest base 51; in this arrangement, head support is provided to the user based on the arrangement of the headrest assembly 5.

In a specific scheme, a longitudinally arranged headrest chute 521 is constructed on the headrest body 52, a sliding seat 53 is arranged in the headrest chute 521, and the sliding seat 53 can be adjusted up and down along the headrest chute 521 relative to the headrest body 52; in this scheme, based on the slide seat 53 can be adjusted up and down along the headrest chute 521 relative to the headrest body 52, the longitudinal height of the headrest body 52 can be adjusted, so as to be suitable for users with different heights. The sliding seat 53 is rotatably connected with the headrest body 52, so that an adaptive adjustment angle can be achieved in the process of leaning on the headrest, and the headrest is suitable for different riding postures. In the drawing, after the middle part of the sliding seat 53 is embedded in the headrest chute 521, a positioning groove 522 is arranged in the headrest chute 521 along the sliding direction, and an elastic pin assembly 531 is mounted on the inner side of the sliding seat 53, and the sliding seat 53 is positioned step by step during the sliding process by adopting the elastic pin assembly.

Further, both end portions of the sliding seat 53 extend out of the headrest chute 521, and both end portions of the sliding seat 53 are rotatably connected with the headrest base 51 in a limited manner. Specifically, as shown in the figure, after the sliding seat 53 is coaxially penetrated through the connection part of the headrest base 51, an arc groove 532 is formed on the side wall of the sliding seat 53, and a stopper 511 embedded in the arc groove is arranged on the connection part of the headrest base 51; the limiting rotation is realized based on the movement of the limiting block in the circular arc groove. The rear side of the circular arc groove is also provided with a notch, so that the limiting block can be separated from or installed into the circular arc groove from the notch, and the disassembly and assembly are convenient.

Example 2:

a second object of the present utility model is to provide a seat comprising a sliding seat back as described in embodiment 1.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims (11)

1. A sliding chair back comprises a chair back support frame (1) and a chair back framework (2) longitudinally sliding and arranged on the front end part of the chair back support frame (1) through a sliding back assembly (3); the method is characterized in that: the slide back assembly (3) comprises a slide base (31); the back end of the chair back framework (2) is arranged on the sliding base (31) in a sliding manner and is connected with an elastic reset piece (32) arranged along the sliding direction, the rear end face of the sliding base (31) is detachably and fixedly connected to the front end of the chair back support frame (1), and the elastic force of the elastic reset piece (32) upwards supports the chair back framework (2);

or the front end of the chair back support frame (1) is arranged on the sliding base (31) in a sliding way and is connected with an elastic resetting piece (32) arranged along the sliding direction, and the front end surface of the sliding base (31) is detachably and fixedly connected with the rear end of the chair back framework (2); the elastic force of the elastic reset piece (32) upwards supports the sliding base (31) and the chair back framework (2).

2. A sliding chair back according to claim 1, wherein: a sliding rail, a sliding groove or a sliding rod (33) which is longitudinally arranged is constructed on the sliding base (31), and the rear end of the chair back framework (2) or the front end of the chair back support frame (1) is arranged on the sliding rail, the sliding groove or the sliding rod (33); the elastic restoring piece (32) is a tension spring or a compression spring arranged along the longitudinal direction.

3. A sliding chair back according to claim 2, wherein: mounting seats (34) at the two longitudinal ends of the sliding base (31) towards the front side or the rear side of the sliding base, and sliding rods (33) are positioned and mounted on the mounting seats (34) at the two ends of the sliding base (31); the back of the chair skeleton (2) rear end or back of the chair support frame (1) front end is provided with sliding sleeve (35) that the activity cup joints on slide bar (33), and elasticity restoring piece (32) are the extension spring or the pressure spring on slide bar (33) that the cover was located between two mount pads (34).

4. A sliding chair back according to claim 3, wherein: at least one end of the sliding rod (33) penetrates out of a mounting seat (34) at one side of the sliding rod, at least two sliding sleeves (35) are sleeved on the same sliding rod (33) at the rear end of the chair back framework (2) or the front end of the chair back supporting frame (1), one sliding sleeve (35) is positioned on the sliding rod (33) between the two mounting seats (34), and the other sliding sleeve (35) is positioned on an extending part (331) of the sliding rod (33); the two sliding sleeves (35) synchronously slide along the sliding rod (33) and reach the highest position at the same time.

5. A sliding chair back according to claim 1, wherein: the sliding back assembly (3) further comprises a base plate, and the base plate is arranged on the sliding base (31) in a sliding manner and is connected by an elastic reset piece (32); the base plate and the sliding base (31) are respectively and detachably fixedly connected to the front end of the chair back support frame (1) and the rear end of the chair back framework (2).

6. A sliding chair back according to claim 1, wherein: a decorative clamping groove (11) is formed in the rear end face of the chair back support frame (1), and the rear end face of the sliding base (31) is detachably and fixedly connected to the front end of the chair back support frame (1) by adopting a screw-fixing part arranged in the decorative clamping groove (11); a decorative panel (12) is embedded in the decorative clamping groove (11) of the chair back support frame (1); the decorative panel (12) covers and conceals the decorative clamping groove (11).

7. A sliding chair back according to any one of claims 1 to 6, wherein: the chair back framework (2) comprises a beam plate (21) connected with the sliding back assembly (3), and a framework main body (22) arranged on the beam plate (21); the framework main body (22) is provided with a chair back supporting surface.

8. A sliding chair back according to claim 7, wherein: a waist rest component (4) is connected to a beam plate (21) below the framework main body (22);

a gear adjusting piece (23) is arranged in the beam plate (21) below the framework main body (22),

the left side and the right side of the gear adjusting piece (23) are spatially distributed and are provided with a gear feeding chute (241) and a gear withdrawing chute (242), and the upper end and the lower end of the gear adjusting piece (23) are provided with connecting grooves (243) communicated with the gear feeding chute (241) and the gear withdrawing chute (242);

the gear adjusting piece (23) comprises a retaining wall (231) which is longitudinally arranged, a multi-stage gear tooth (232) which faces one side of the gear feeding chute (241) is longitudinally arranged on one side of the retaining wall (231), the tooth wall of the gear tooth (232) comprises a guide wall (233) which is inclined obliquely upwards, and clamping plates (234) on the top of the guide wall (233) and the inner retaining wall (231); the clamping plate (234) is constructed into an arc-shaped plate with a sunk middle part or inner end, and a deformation space (235) for the extrusion deformation of the guide wall (233) is formed among the clamping plate (234), the guide wall (233) and the clamping plate (234);

the rear end part of the waist rest component (4) is longitudinally arranged on the beam plate (21) in a sliding way, and a gear clamping rod (411) is arranged to move on the gear adjusting piece (23).

9. A sliding chair back according to claim 8, wherein: the lumbar support assembly (4) comprises a lumbar support base (41) and a lumbar support body (42) rotatably arranged on the lumbar support base (41); the waist support base (41) is internally provided with an elastic piece which props against the waist support body (42).

10. A sliding chair back according to claim 7, wherein: the upper end of the beam plate (21) or the framework main body (22) is provided with a headrest assembly (5), and the headrest assembly (5) comprises a headrest base (51) fixedly connected to the beam plate (21) or the framework main body (22) and a headrest body (52) rotatably arranged on the headrest base (51);

the headrest body (52) is provided with a longitudinally arranged headrest chute (521), a sliding seat (53) is arranged in the headrest chute (521), and the sliding seat (53) can be adjusted up and down along the headrest chute (521) relative to the headrest body (52); two end parts of the sliding seat (53) extend out of the headrest sliding groove (521), and two end parts of the sliding seat (53) are in limit rotation connection with the headrest base (51).

11. A seat, characterized in that: a sliding chair back comprising the sliding chair back of any one of claims 1-10.