CN219396733U - Lifting chair - Google Patents

Abstract

The utility model discloses a lifting chair, which comprises a chair seat, a positioning bone, a backrest and a locking structure, wherein the lower end of the positioning bone is connected with the chair seat, the backrest comprises a connecting frame, an installation gap with a downward opening is arranged in the connecting frame, the upper end of the positioning bone is positioned in the installation gap, the connecting frame is connected to the upper end of the positioning bone in a sliding manner along the up-down direction, and the locking structure can penetrate and lock the connecting frame and the positioning bone.

Description

Lifting chair

Technical Field

The utility model relates to the field of lifting chairs, in particular to a lifting chair.

Background

Office chairs in the market often have backrests, in order to be applicable to the user of different physique, can adopt hole axle cooperation to realize the step adjustment of back height between back and the seat, in order to further improve the adjustment precision of back height, improve back stability and user comfort, also can adopt transmission modes such as motor lead screw to realize the stepless automatic rising of back on the market, but this regulation mode needs the part many, and manufacturing cost is high, is difficult to popularize market.

Disclosure of Invention

The present utility model aims to provide a lifting chair which solves one or more technical problems existing in the prior art, and at least provides a beneficial choice or creation condition.

The utility model solves the technical problems as follows:

the utility model provides a lifting chair, includes seat support, location bone, back and locking structure, the lower extreme of location bone is connected the seat support, the back includes the link, be equipped with the installation gap of opening decurrent in the link, the upper end of location bone is located in the installation gap, the link along upper and lower direction sliding connection in the upper end of location bone, locking structure can pass and lock the link with the location bone.

The technical scheme has at least the following beneficial effects: the positioning bone and the chair seat are mutually fixed, the connecting frame is sleeved at the upper end of the positioning bone through the mounting gap and can slide up and down along the positioning bone, after the position of the backrest is adjusted, the locking structure penetrates through the connecting frame and the positioning bone and locks the positioning bone and the connecting frame mutually.

As a further improvement of the above technical solution, the locking structure may tighten the mounting slit. When the locking structure tightens up the installation gap for the both sides terminal surface of link is constantly close to and compresses tightly on the location bone, improves the sliding friction force between link and the location bone, improves the joint strength of location bone and link, reduces the connection clearance between the two simultaneously, and then reduces and rocks and the not hard up phenomenon of part.

As a further improvement of the technical scheme, the locking structure comprises a nut, a screw rod and a rotating head, wherein an installation through hole is formed in the connecting frame, the nut is connected to the front end face of the connecting frame, the rotating head is connected to the rear end of the screw rod, the rotating head is larger than the inner diameter of the installation through hole, and the screw rod penetrates through the installation through hole and is in threaded connection with the nut. The nut is fixed in the preceding terminal surface of link, the front end threaded connection of screw rod is outside the rear end of nut, revolve the head then block outside the rear end of installation through-hole for revolve the head and offset at the rear end face of link, the user can twist the head forward through the accessible after adjusting the position of back, make the screw rod rotate and the part of meshing nut is deeper, improve the compressive force of revolve the head at the terminal surface behind the link, realize fixing of location bone and link, when the position of needs adjustment back, reverse twist revolve the head can make location bone and link become flexible, the user can manual adjustment, convenient and fast.

As another improvement of the technical scheme, the left side and the right side of the positioning bone are bent forwards to form guide plates, and guide grooves matched with the guide plates in position are formed in the inner wall of the connecting frame. The guide way is mutually communicated in the installation gap, the extending direction of the guide way is mutually parallel in the extending direction of the installation gap, when the positioning bone stretches into or exits from the installation gap in the connecting frame, the guide plate can slide back and forth along the guide way, the guide plate can assist in the installation and disassembly of the positioning bone, the positioning of the positioning bone is convenient, dislocation and skew phenomena of the positioning bone in the installation gap are prevented, and meanwhile, the stress intensity of the positioning bone is also improved by the guide plate, and the possibility of fracture of the positioning bone is reduced.

As another improvement of the technical scheme, the positioning bone is provided with an adjusting groove extending up and down, and the locking structure is positioned in the adjusting groove. The regulating groove extends along the upper and lower direction, and when the locking structure is loosened, the regulating groove limits the moving direction of the locking structure, and simultaneously provides guiding function, so that the locking structure can move up and down along with the connecting frame, and after the position of the connecting frame is determined, a user can lock the positioning bone and the connecting frame through the locking structure, thereby realizing stepless adjustment of the height of the backrest and improving adjustment precision.

As another improvement of the above technical solution, the present utility model further includes armrests, and the two armrests are respectively disposed on the left and right sides of the seat. Armrests on two sides of the chair seat can facilitate the user to place double arms, and improve the use comfort of the user.

As the further improvement of above-mentioned technical scheme, the handrail includes chassis, holds in the palm hand rest and first shell fragment, the bottom of chassis is connected the seat support, the inside cavity of chassis, the lateral wall of chassis is equipped with dodges the opening, dodge the opening and extend to the chassis top, dodge the open-ended left and right sides and all be equipped with a plurality of draw-in grooves along the upper and lower direction, hold in the palm the hand rest cover and be in on the chassis, first shell fragment is located in the chassis and be annular, the central line lateral extension of first shell fragment, one side of first shell fragment is equipped with the button, the button wears out in proper order and dodges opening and holds in the palm the hand rest, the opposite side of first shell fragment offsets the inner wall of chassis, be equipped with the fin on the first shell fragment, the fin is located the both sides of button and stretch into in the both sides draw-in groove respectively. The top of chassis is the regulation section, the inside cavity of part of regulation section forms and accomodates the chamber, dodge the opening and accomodate the chamber intercommunication each other and upwards extend to the top surface of regulation section, hold in the palm the hand rest cover on the regulation section, annular first shell fragment is located and accomodates the intracavity, moreover the central line of first shell fragment and dodge open-ended opening direction mutually perpendicular, when the user needs the height of adjusting the hand rest, press the button of wearing out the hand rest for the button is toward dodging the opening part and remove, the horizontal shrink of first shell fragment, the draw-in groove is moved along with the shrink direction of first shell fragment to the fin, drag the hand rest along with the user, first shell fragment also moves along with the hand rest when the user cancels the button press, first shell fragment kick-backs, the button is protruding, the fin continues to impress in corresponding draw-in groove simultaneously, realize holding in the palm the position of hand rest and chassis, the user can adjust the height of the relative chair seat of hand rest, improve user's use experience, and is convenient and fast.

As another improvement of the above technical solution, the backrest includes a back frame, and the connection frame is connected to the back frame and is located in the back frame. The back frame and the connecting frame are connected and supported, so that the stress intensity of the connecting frame and the back frame is improved, and the use stability is improved.

As a further improvement of the technical scheme, the utility model further comprises a head support, wherein the head support comprises clamping plates, sliding plates and cover plates, the clamping plates are clamped on the top side of the back frame, the sliding plates are connected to the clamping plates in a sliding mode along the up-down direction, second elastic pieces are arranged on the sliding plates, the clamping plates are provided with a plurality of arc-shaped grooves along the up-down direction, the second elastic pieces can extend into any arc-shaped groove, and the cover plates are connected to and sleeved on the sliding plates. A plurality of arc grooves on the splint are arranged into the wavy, and the cover plate is pulled to move up and down, so that a second elastic sheet on the sliding plate can extend into any arc groove along the up-down direction, the positioning between the cover plate and the splint is realized, the relative distance between the cover plate and the backrest can be adjusted according to the head-shoulder-neck ratio of the user, the use experience of the user is improved, and the device is convenient and quick.

As another improvement of the technical scheme, the top surface of the chair seat is sleeved with an elastic pad. The elastic pad can be directly sleeved on the chair seat, so that the chair is convenient to disassemble, assemble, change and wash.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the utility model, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a block diagram of a lift chair according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a lift chair according to one embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a lift chair according to one embodiment of the present utility model;

FIG. 4 is a block diagram of a bone alignment provided in accordance with one embodiment of the present utility model;

FIG. 5 is an exploded view of a handrail provided by an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a head rest provided in an embodiment of the present utility model;

fig. 7 is an exploded view of a head rest according to an embodiment of the present utility model.

In the accompanying drawings: 110-seat, 111-leg, 112-resilient pad, 121-link, 122-back frame, 130-locking structure, 140-armrest, 150-head rest, 160-locating bone, 210-lumbar support plate, 220-mesh, 310-mounting slot, 320-nut, 330-screw, 340-swivel, 350-mounting through hole, 410-guide plate, 420-adjustment slot, 510-chassis, 511-adjustment section, 512-receiving cavity, 513-avoidance opening, 514-clamping slot, 520-hand rest, 530-first spring, 531-key, 532-fin, 610-clamp plate, 611-arcuate slot, 620-slide plate, 621-second spring, 631-front cover, 632-back cover, 710-guide post, 720-guide through hole.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to a connection structure that may be better formed by adding or subtracting connection aids depending on the particular implementation. The technical features of the utility model can be interactively combined on the premise of no contradiction and conflict.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 and 2, the elevating chair includes a seat 110, a positioning bone 160, a backrest and a locking structure 130, the lower end of the positioning bone 160 is connected to the seat 110, the backrest includes a back frame 122 and a connection frame 121, the connection frame 121 is enclosed by the back frame 122, and both left and right sides of the connection frame 121 extend in a direction away from the connection frame 121 and are connected to inner sidewalls of the back frame 122. In actual production, in order to fit the human engineering curve, the inner bottom surface of the back frame 122 is provided with an arc-shaped waist support plate 210 for supporting the waist of the user, and the connecting frame 121 is located at the rear of the waist support plate 210 and is bulged backwards relative to the back frame 122, so as to ensure that the waist support plate 210 is avoided.

In this application, the bottom of seat support 110 is equipped with chair leg 111, and the universal wheel is connected to the bottom of chair leg 111, and seat support 110 accessible cylinder realizes high flexible in fact, and seat support 110 can rotate relative chair leg 111 simultaneously, improves user's use experience. In addition, the front end surface of the back frame 122 can be covered with cloth or mesh surface 220, thereby improving the aesthetic appearance and the use experience of the user.

Referring to fig. 3, the connecting frame 121 is provided with a mounting slot 310 with a downward opening, the upper end of the positioning bone 160 is located in the mounting slot 310, the connecting frame 121 is slidably connected to the upper end of the positioning bone 160 along the up-down direction, and the locking structure 130 may pass through and lock the connecting frame 121 and the positioning bone 160.

Specifically, the positioning bone 160 and the seat 110 are fixed to each other, the connecting frame 121 is sleeved at the upper end of the positioning bone 160 through the mounting gap 310 and can slide up and down along the positioning bone 160, after the position of the backrest is adjusted, the locking structure 130 passes through the connecting frame 121 and the positioning bone 160 and locks the positioning bone 160 and the connecting frame 121 to each other, the positioning bone 160 stretches into the mounting gap 310, the inner cavity of the connecting frame 121 forms a wrapping effect on the positioning bone 160, the connection stability between the connecting frame 121 and the positioning bone 160 is improved, the connection strength is improved, and a user can adjust the position of the backrest relative to the positioning bone 160 by locking or loosening the locking structure 130.

Further, the locking structure 130 may tighten the mounting slot 310.

When the locking structure 130 tightens up the mounting gap 310, the end surfaces at two sides of the connecting frame 121 are continuously close to and pressed on the positioning bone 160, so that the sliding friction force between the connecting frame 121 and the positioning bone 160 is improved, the connection strength between the positioning bone 160 and the connecting frame 121 is improved, and meanwhile, the connection gap between the positioning bone 160 and the connecting frame 121 is reduced, and further shaking and loosening of parts are reduced.

In this embodiment, the locking structure 130 includes a nut 320, a screw 330 and a screw 340, the connecting frame 121 is provided with a mounting through hole 350, the nut 320 is connected to the front end surface of the connecting frame 121, the screw 340 is connected to the rear end of the screw 330, the screw 340 is larger than the inner diameter of the mounting through hole 350, and the screw 330 passes through the mounting through hole 350 and is screwed on the nut 320.

During installation, the nut 320 can be fixed on the front end face of the connecting frame 121 in a welding mode and the like, the connecting frame 121 is provided with a front-back through installation through hole 350, the front end of the screw 330 penetrates into the installation gap 310 of the connecting frame 121 forwards, then sequentially penetrates through the positioning bone 160 and the installation through hole 350 and then stretches into the nut 320, finally the rotary head 340 is rotated, the front end of the screw 330 is in threaded connection with the nut 320, the rotary head 340 is clamped outside the rear end of the installation through hole 350, the rotary head 340 abuts against the rear end face of the connecting frame 121, a user can twist the rotary head 340 forwards after adjusting the position of the backrest, the screw 330 rotates and the part engaged with the nut 320 is deeper, the pressing force of the rotary head 340 on the rear end face of the connecting frame 121 is improved, the fixing of the positioning bone 160 and the connecting frame 121 is realized, when the position of the backrest is required to be adjusted, the positioning bone 160 and the connecting frame 121 can be loosened by reversely twisting the rotary head 340, and the user can adjust manually.

It should be noted that, the screw 330 may also be positioned on the nut 320, and the rear end of the screw 330 is threaded into the mounting hole 350 and the positioning bone 160 and is screwed on the rotating head 340, when the rotating head 340 is rotated, the length of the screw 330 is changed, so as to lock or unlock the positioning bone 160 and the connecting frame 121. The circumference of the knob is provided with concave patterns, so that the knob is convenient for a user to twist by one hand. The locking mechanism 130 may be a component such as a bolt.

Referring to fig. 4, the left and right sides of the positioning bone 160 are bent forward to form a guide plate 410, and a guide groove matching the position of the guide plate 410 is provided on the inner wall of the connecting frame 121.

Specifically, the guide grooves are mutually communicated in the mounting gaps 310, the extending directions of the guide grooves are mutually parallel to the extending directions of the mounting gaps 310, when the positioning bones 160 extend into or withdraw from the mounting gaps 310 in the connecting frame 121, the guide plates 410 can slide back and forth along the guide grooves, the guide plates 410 can assist in mounting and dismounting the positioning bones 160, positioning of the positioning bones 160 is facilitated, dislocation and skew phenomena of the positioning bones 160 in the mounting gaps 310 are prevented, meanwhile, the stress intensity of the positioning bones 160 is improved by the guide plates 410, and the possibility of breakage of the positioning bones 160 is reduced.

In fact, the positioning rib 160 is bent in an L shape, the bottom end of the positioning rib 160 is rotatably connected to the bottom side of the seat 110, the lateral portion of the positioning rib 160 is fixed to the seat 110 by a bolt, and the top end of the vertical portion of the positioning rib 160 extends into the mounting gap 310 of the connecting frame 121. Furthermore, the central portion of the positioning bone 160 bulges to form a reinforced concave surface, thereby improving the deformation resistance of the positioning bone 160. In addition, the positioning bone 160 may also have a vertically extending shape.

Further, the positioning bone 160 is provided with an adjusting slot 420 extending up and down, and the locking structure 130 is located in the adjusting slot 420.

Specifically, the adjusting groove 420 extends along the up-down direction, when the locking structure 130 is released, the adjusting groove 420 limits the moving direction of the locking structure 130, and simultaneously provides a guiding avoidance function, so that the locking structure 130 can move up and down along with the connecting frame 121, after the position of the connecting frame 121 is determined, a user can lock the positioning bone 160 and the connecting frame 121 through the locking structure 130, stepless adjustment of the height of the backrest is realized, and adjustment precision is improved.

In this embodiment, the height position of the locking structure 130 is synchronous with the height position of the connecting frame 121, and the adjusting slot 420 is present, so that the locking structure 130 is not required to be completely separated from the connecting frame 121 and the positioning bone 160, and the position of the backrest is adjusted, which is convenient and fast. In addition, in other embodiments, the connecting frame 121 is provided with a vertical hollow groove, the hollow groove extends upwards to the top surface of the connecting frame 121, and the locking structure 130 can penetrate into the hollow groove and be positioned on the positioning rib 160 in the connecting frame 121, so that the hollow groove can enable the locking structure 130 to relatively move between the connecting frames 121.

Furthermore, the present utility model further includes armrests 140, and two of the armrests 140 are disposed on the left and right sides of the seat 110, respectively.

Specifically, the armrests 140 disposed on both sides of the seat 110 can facilitate the placement of the arms by the user, thereby improving the comfort of the user.

Referring to fig. 5, the armrest 140 includes a chassis 510, a hand supporting frame 520 and a first elastic piece 530, the bottom end of the chassis 510 is connected with the seat 110, the chassis 510 is hollow, a side wall of the chassis 510 is provided with an avoidance opening 513, the avoidance opening 513 extends to the top end of the chassis 510, the left and right sides of the avoidance opening 513 are provided with a plurality of clamping grooves 514 along the up-down direction, the hand supporting frame 520 is sleeved on the chassis 510, the first elastic piece 530 is located in the chassis 510 and is annular, the center line of the first elastic piece 530 extends transversely, one side of the first elastic piece 530 is provided with a key 531, the key 531 sequentially penetrates through the avoidance opening 513 and the hand supporting frame 520, the other side of the first elastic piece 530 abuts against the inner wall of the chassis 510, the first elastic piece 530 is provided with fins 532, and the fins 532 are located on two sides of the key 531 and extend into the clamping grooves 514 on two sides respectively.

Specifically, the top of chassis 510 is adjusting section 511, the inside cavity of part of adjusting section 511 forms and accomodates chamber 512, dodge opening 513 has been seted up to the lateral wall of adjusting section 511, dodge opening 513 and accomodate chamber 512 intercommunication each other and upwards extend to the top surface of adjusting section 511, support frame 520 overlaps on adjusting section 511, annular first shell fragment 530 is located and accomodates chamber 512, moreover, the central line of first shell fragment 530 and the opening direction mutually perpendicular who dodges opening 513, when the user needs the height of adjusting support frame 520, press the button 531 of wearing out support frame 520, make button 531 to dodge opening 513 department and remove, first shell fragment 530 transversely shrink, fin 532 is followed the shrink direction of first shell fragment 530 and is moved out of draw-in groove 514, along with user drags support frame 520, first shell fragment 530 also is followed support frame 520 and is removed, when the user cancels the resilience to press of button 531, button 531 is protruding to wear out support frame 520, fin 532 continues to press in corresponding draw-in groove 514 simultaneously, realize support frame 520 and the location of chassis 510, the user can adjust the relative height of support frame 140, the user's seat is convenient and the user's seat is experienced fast, the user's 110 is convenient for the chair seat is convenient.

It should be noted that, the first elastic piece 530 is annular, and the width of the first elastic piece 530 is smaller than the width of the avoiding opening 513, the fins 532 are respectively disposed on two sides of the first elastic piece 530, and at least two fins 532 are provided on a single side, so as to improve positioning stability.

Further, referring to fig. 6, the present utility model further includes a head rest 150, where the head rest 150 includes a clamping plate 610, a sliding plate 620, and a cover plate, the clamping plate 610 is clamped on the top side of the back frame 122, the sliding plate 620 is slidably connected to the clamping plate 610 along the up-down direction, a second elastic sheet 621 is disposed on the sliding plate 620, the clamping plate 610 is arranged with a plurality of arc-shaped grooves 611 along the up-down direction, and the second elastic sheet 621 can extend into any one of the arc-shaped grooves 611, and the cover plate is connected to and sleeved on the sliding plate 620.

Specifically, the plurality of arc grooves 611 on the clamping plate 610 are arranged in a wavy manner, and the cover plate is pulled to move up and down, so that the second elastic sheet 621 on the sliding plate 620 can extend into any arc groove 611 along the up-down direction, positioning between the cover plate and the clamping plate 610 is realized, a user can adjust the relative distance between the cover plate and the backrest according to the head-shoulder-neck ratio of the user, the user experience is improved, and the device is convenient and quick.

Referring to fig. 7, the cover plate includes a front cover 631 and a rear cover 632, the sliding plate 620 and the clamping plate 610 are located between the front cover 631 and the rear cover 632, the front cover 631 and the rear cover 632 can be connected and fixed by means of a buckle, a screw, etc., the bottom of the clamping plate 610 is buckled on the back frame 122, guide posts 710 are disposed on the clamping plate 610 and located on two sides of the arc-shaped groove 611, guide through holes 720 are disposed on two sides of the second elastic plate 621 on the sliding plate 620, the guide through holes 720 extend up and down, the guide posts 710 are located in the guide through holes 720, and when the cover plate drives the sliding plate 620 to move, the guide posts 710 can slide up and down along the guide through holes 720, so as to improve stability. Moreover, the end surface of the sliding plate 620 near the clamping plate 610 is provided with a lifting bar to provide a deformation space of the second elastic piece 621, reduce collision between the sliding plate 620 and the clamping plate 610, and improve strength of the sliding plate 620.

In this embodiment, the top surface of the seat 110 is covered with an elastic pad 112.

Specifically, the elastic pad 112 can be directly sleeved on the seat 110, so as to facilitate disassembly, assembly and replacement.

In this embodiment, the lifting chair includes a seat 110, a positioning bone 160, a backrest, a locking structure 130, an armrest 140 and a head support 150, the locking structure 130 includes a nut 320, a screw 330 and a rotating head 340, a mounting through hole 350 is provided on the connecting frame 121, the nut 320 is connected to the front end surface of the connecting frame 121, the rotating head 340 is connected to the rear end of the screw 330, the rotating head 340 is larger than the inner diameter of the mounting through hole 350, the screw 330 passes through the mounting through hole 350 and is screwed on the nut 320, the installation gap 310 can be tightened, the armrest 140 includes a bottom frame 510, a hand rest 520 and a first elastic piece 530, the bottom end of the bottom frame 510 is connected with the seat 110, the bottom frame 510 is hollow, the side wall of the bottom frame 510 is provided with an avoidance opening 513, the avoidance opening 513 extends to the top end of the bottom frame 510, the left and right sides of the avoidance opening 513 are provided with a plurality of clamping grooves 514 along the up and down directions, the hand rest 520 is sleeved on the bottom frame 510, the first elastic piece 530 is located in the bottom frame 510, one side of the first elastic piece 530 is provided with a button 531, the button 531 sequentially penetrates out of the opening 513 and the hand rest 520, the other side of the first elastic piece 530 abuts against the inner wall of the bottom frame 510, the first elastic piece 530 is provided with a fin 611 on the upper side of the clamping plate 620, the upper side of the upper clamping plate 620 is provided with two side of the upper clamping plates 610 and two side of the upper clamping plates 620 are provided with upper clamping plates 610, the upper clamping plates 620 and lower side of the upper clamping plates 610 are arranged along the upper sides of the upper clamping plates 610, and lower sides of the upper clamping plates 610 are respectively, and upper sides of the upper clamping plates 610 and lower sides of the upper clamping plates are 610 are respectively.

While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the examples, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims (8)

1. A lifting chair comprising a seat (110), characterized in that: including locating bone (160), back and locking structure (130), the lower extreme of locating bone (160) is connected seat support (110), the back includes link (121), be equipped with opening mounting slit (310) down in link (121), the upper end of locating bone (160) is located in mounting slit (310), link (121) along upper and lower direction sliding connection in the upper end of locating bone (160), locking structure (130) can pass and lock link (121) with locating bone (160), still include handrail (140), two handrail (140) set up respectively in the left and right sides of seat support (110), handrail (140) are including chassis (510), support hand rest (520) and first shell fragment (530), the bottom of chassis (510) is connected seat support (110), the inside cavity of chassis (510), the lateral wall of chassis (510) is equipped with dodges opening (513), dodges opening (513) extend to chassis (510) are in the upper and lower side of chassis (510) are equipped with in the aspect of a plurality of circular shape openings (514) are all dodge in chassis (510) the upper and lower side of chassis (510), the central line of first shell fragment (530) transversely extends, one side of first shell fragment (530) is equipped with button (531), opening (513) and hand rest (520) are dodged in proper order worn out to button (531), the opposite side of first shell fragment (530) offsets the inner wall of chassis (510), be equipped with fin (532) on first shell fragment (530), fin (532) are located in both sides of button (531) and stretch into both sides draw-in groove (514) respectively.

2. A lifting chair as claimed in claim 1, wherein: the locking structure (130) may tighten the mounting slot (310).

3. A lifting chair as claimed in claim 2, wherein: the locking structure (130) comprises a nut (320), a screw rod (330) and a rotating head (340), wherein an installation through hole (350) is formed in the connecting frame (121), the nut (320) is connected to the front end face of the connecting frame (121), the rotating head (340) is connected to the rear end of the screw rod (330), the rotating head (340) is larger than the inner diameter of the installation through hole (350), and the screw rod (330) penetrates through the installation through hole (350) and is connected to the nut (320) in a threaded mode.

4. A lifting chair as claimed in claim 2, wherein: the left side and the right side of the positioning bone (160) are bent forwards to form guide plates (410), and guide grooves matched with the positions of the guide plates (410) are formed in the inner wall of the connecting frame (121).

5. A lifting chair as claimed in claim 1, wherein: the positioning bone (160) is provided with an adjusting groove (420) extending up and down, and the locking structure (130) is positioned in the adjusting groove (420).

6. A lifting chair as claimed in claim 1, wherein: the backrest comprises a back frame (122), and the connecting frame (121) is connected with the back frame (122) and is positioned in the back frame (122).

7. A lifting chair as claimed in claim 6, wherein: still include head rest (150), head rest (150) include splint (610), slide (620) and apron, splint (610) clamp is in the top side of back of body frame (122), slide (620) along upper and lower direction sliding connection in on splint (610), be equipped with second shell fragment (621) on slide (620), splint (610) have a plurality of arc grooves (611) along upper and lower direction range, second shell fragment (621) can stretch into arbitrary in arc groove (611), the apron is connected and is overlapped on slide (620).

8. A lifting chair as claimed in claim 1, wherein: the top surface of the chair seat (110) is sleeved with an elastic pad (112).