Chair with liftable chair seat

Abstract

The utility model discloses a chair with a liftable chair seat. The chair comprises a chair frame and the chair seat mounted on the chair frame, the chair frame comprises a supporting leg, a supporting pipe and a first limiting rod, and a plurality of lock holes which are formed up and down are formed in the supporting leg; the chair back and the chair seat are arranged on the supporting pipe; the supporting tubes are inserted into the supporting legs and slidably connected; the first limiting rod is located on the inner side of the supporting pipe and hinged to the supporting pipe. The pressing part on the first limiting rod extends out of the supporting pipe, and the locking part on the first limiting rod extends out of the supporting pipe and then is connected with the lock hole in the supporting leg in an inserted mode. The locking driving piece is arranged between the supporting pipe and the first limiting rod and used for driving the first limiting rod to be connected with the lock hole in an inserted mode. According to the arrangement, the first limiting rods are obliquely arranged between the supporting pipes and the supporting legs so as to provide support between the supporting pipes and the supporting legs, and the inserting parts on the first limiting rods provide support between the supporting pipes and the supporting legs, so that the strength of the chair frame is higher, and the supporting effect is better.

Description

Technical Field

[0001] The utility model relates to the field of home furnishings, in particular to a chair with a liftable seat. Background Art

[0002] Since different users have different usage habits and different heights, users with different height requirements will adjust the height of the chair when using the chair.

[0003] The prior art with the publication number CN211242450U discloses a folding chair, comprising a seat, a front leg tube and a rear leg tube, wherein the front leg tube and the rear leg tube on the same side of the seat are rotatably hinged together, the front leg tube and the rear leg tube support the seat and enable the seat to be flipped and folded, and also comprising two lifting brackets respectively arranged corresponding to the front leg tube and the rear leg tube, the lifting bracket comprising two support tubes and a connecting tube connecting the two support tubes, the two support tubes of one lifting bracket are respectively telescopically plugged with the two front leg tubes, the two support tubes of the other lifting bracket are respectively telescopically plugged with the two rear leg tubes, and a locking mechanism is provided between the support tube and the leg tube plugged therewith. The support tube and the leg tube plugged therewith are locked together by the locking mechanism. The locking mechanism comprises an elastic protruding ball head and a locking hole, the leg tube is inserted into the support tube, the elastic protruding ball head is arranged on the leg tube, the locking hole is a plurality of and is arranged on the support tube at intervals along the length direction, and the elastic protruding ball head is inserted into the locking hole. The locking mechanism includes an elastic member, a locking rod and a locking hole. The locking holes are multiple and are spaced apart along the length direction on the leg tube. The locking rod is movably arranged in the connecting tube in the transverse direction. The elastic member drives the locking rod to move outward in the transverse direction and inserts the outer end of the locking rod into the locking hole.

[0004] In the prior art, the position angle needs to be locked, and it is inconvenient to operate when the chair adjusts its height. Utility Model Content

[0005] In order to solve the problems of position adjustment assistance and inconvenient height adjustment in the prior art, the utility model aims to provide a chair with a liftable seat, which requires fewer locking positions, has a simpler structure, and is more convenient to operate.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a chair with a liftable seat, comprising a retractable chair frame, and a seat and a backrest mounted on the chair frame; the chair frame comprises a supporting foot, a supporting tube and a first limiting rod, the supporting foot is provided with a plurality of locking holes connected with the interior thereof, and the plurality of locking holes are arranged up and down; the backrest and the seat are installed on the supporting tube; the supporting tube is provided with a first opening and a second opening, the supporting tube is inserted into the supporting foot and slidably connected; wherein the first opening on the supporting tube is located outside the supporting foot, and the second opening on the supporting tube is located inside the supporting foot; the first limiting rod is located on the inner side of the supporting tube, the first limiting rod is hinged to the supporting tube, and a pressing portion and a locking portion are protruded on the first limiting rod; wherein the pressing portion of the first limiting rod extends from the first opening of the supporting tube, and the locking portion of the first limiting rod extends from the second opening of the supporting tube and is plugged into the locking hole on the supporting foot; the locking drive is arranged between the supporting tube and the first limiting rod, and the locking drive is used to drive the first limiting rod to be plugged into the locking hole.

[0007] Preferably, the two support tubes are arranged corresponding to the two support feet, the two support feet are fixedly connected, the two support tubes are fixedly connected, and the two first limit rods are respectively installed in the two support tubes.

[0008] Preferably, the two support tubes are fixedly connected by a first cross bar, the seat is mounted on the first cross bar, the two ends of the chair back are respectively connected to the tops of the two support tubes, and the two armrests are mounted on both sides of the chair back; a foot pedal is installed on the supporting foot.

[0009] Preferably, the supporting legs are in a herringbone shape, and the supporting legs include a first leg and a second leg, the first leg is located in front of the second leg, the top of the second leg is fixedly connected to the first leg, a lock hole is provided on the first leg, and the supporting tube is plugged into the first leg; among the two supporting legs, the two first legs are fixedly connected by a second cross bar, and the two second legs are fixedly connected by a third cross bar.

[0010] Preferably, a first sliding sleeve is fixed to the top of the supporting foot, and a second sliding sleeve is fixed to the bottom of the supporting tube; the supporting tube passes through the first sliding sleeve and slides in place, the second sliding sleeve is located in the supporting foot and slides in place, and the supporting foot and the supporting tube have a clearance fit.

[0011] Preferably, a second limiting rod is further provided in the support tube, the first limiting rod is hinged to the support tube via the first axis, the second limiting rod is slidably connected to the first axis, and the bottom of the second limiting rod extends from the support tube and is hinged to the support foot.

[0012] Preferably, the second limiting rod is connected to the first connecting hole on the supporting foot via a second rotating shaft; the multiple first connecting holes on the supporting foot are arranged up and down, and the second rotating shaft is connected to the supporting foot via the first connecting holes.

[0013] Preferably, a sliding hole is formed on the second limiting rod, and the first shaft passes through the sliding hole and slides in engagement therewith.

[0014] Preferably, the locking drive member includes a spring, and both ends of the spring are respectively abutted against the second limit rod and the support tube; a limit portion is raised on the first limit rod, a third opening is opened on the support tube, and a cover is installed at the third opening, one end of the spring is sleeved on the limit portion, and the other end of the spring is inserted into the cover.

[0015] Preferably, the first opening is arranged on the front side of the support tube, and the second opening is arranged on the rear side of the support tube.

[0016] The beneficial effects of the technical solution of the present utility model are as follows: the first limit rod is obliquely arranged between the support tube and the support foot so as to provide support between the support tube and the support foot, and the plug-in portion on the first limit rod provides support between the support tube and the support foot, thereby making the chair frame stronger and providing better support effect; the present application only requires pressing the pressing portion of the first limit rod, thereby making the adjustment of the chair height easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the chair Figure 1 ;

[0018] Figure 2 The structure of the chair Figure 2 ;

[0019] Figure 3 It is a schematic diagram of the connection structure between the support tube and the first support leg;

[0020] Figure 4 for Figure 3 Middle AA section view;

[0021] Figure 5 for Figure 3 Middle BB section view;

[0022] Figure 6 is a schematic structural diagram of a first limiting rod;

[0023] Figure 7 is a schematic structural diagram of a second limiting rod;

[0024] Figure 8 Schematic diagram of the support tube structure Figure 1 ;

[0025] Fig. 9 Schematic diagram of the support tube structure Figure 2 ;

[0026] Fig.10 This is a schematic diagram of the structure of the first leg.

[0027] Reference numerals: 1, supporting leg; 11, first connecting hole; 12, locking hole; 13, first sliding sleeve; 16, first supporting leg; 17, second supporting leg;

[0028] 2. Support tube; 21. First opening; 22. Third connecting hole; 23. Third connecting hole; 24. Second opening; 25. Second sliding sleeve; 28. Locking sleeve;

[0029] 4. first limiting rod; 41. pressing part; 42. first shaft; 43. locking part; 44. limiting part; 45. locking driving member; 46. cover;

[0030] 5. Second limiting rod; 51. Sliding hole; 52. Second connecting hole;

[0031] 6. Second crossbar; 61. Footrest; 7. First crossbar; 8. Third crossbar; 9. Chair back; 10. Chair seat; 101. Armrest. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0037] like Figures 1 to 10 The chair with a liftable seat shown comprises a retractable chair frame, and a seat 10 and a chair back 9 mounted on the chair frame; the chair frame comprises a support leg 1, a support tube 2 and a first limit rod 4;

[0038] The support foot 1 is provided with a plurality of lock holes 12 connected to the interior thereof, and the plurality of lock holes 12 are arranged up and down; the chair back 9 and the chair seat 10 are mounted on the support tube 2; the support tube 2 is provided with a first opening 21 and a second opening 24, and the support tube 2 is inserted into the support foot 1 and slidably connected; wherein the first opening 21 on the support tube 2 is located outside the support foot 1, and the second opening 24 on the support tube 2 is located inside the support foot 1

[0039] The first limiting rod 4 is located inside the support tube 2, the first limiting rod 4 is hinged to the support tube 2, and a pressing portion 41 and a locking portion 43 are protruded from the first limiting rod 4; wherein the pressing portion 41 of the first limiting rod 4 extends from the first opening 21 of the support tube 2, and the locking portion 43 of the first limiting rod 4 extends from the second opening 24 of the support tube 2 and then plugs into the locking hole 12 on the support foot 1; the locking driving member 45 is arranged between the support tube 2 and the first limiting rod 4, and the locking driving member 45 is used to drive the first limiting rod 4 to plug into the locking hole 12. In this embodiment, a locking sleeve 28 is arranged outside the support tube, and the pressing portion 41 on the first limiting rod 4 extends from the locking sleeve 28.

[0040] In this way, in the chair, the first limit rod 4 for locking the height of the chair frame is hidden inside the support tube 2, thereby making the structure of the chair more compact, and the hidden locking structure makes the appearance of the chair more concise, and the one-button locking form makes the operation more convenient; during the process of adjusting the height of the chair, the seat 10 and the backrest 9 move synchronously, thereby keeping the support position unchanged, so that the support stability of the chair is better.

[0041] like Figure 1 and Figure 2 As shown, in this embodiment, the first opening 21 is arranged at the front side of the support tube 2, and the second opening 24 is arranged at the rear side of the support tube 2. In this way, the pressing portion 41 of the first limiting rod 4 protrudes from the front side of the chair frame, thereby making it easier to operate the chair frame.

[0042] like Figure 1 and Figure 2 As shown, in this embodiment, in the chair frame, two support tubes 2 are arranged corresponding to two support feet 1, the two support feet 1 are fixedly connected, the two support tubes 2 are fixedly connected, and the two first limit rods 4 are respectively installed in the two support tubes 2. In this way, the double-tube parallel support structure makes the chair stronger and the support effect more stable; and the chair frame needs two hands to be operated to extend and retract, so that the locking effect of the chair is more stable, which can effectively avoid misoperation.

[0043] Further preferably, the two support tubes 2 are fixedly connected by the first cross bar 7, the seat 10 is mounted on the first cross bar 7, the two ends of the chair back 9 are respectively connected to the tops of the two support tubes 2, and the two armrests 101 are mounted on both sides of the chair back 9; and the two support feet 1 are mounted with footrests 61. Such an arrangement can further improve the comfort of the chair.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, the supporting leg 1 is in a herringbone shape, and the supporting leg 1 includes a first leg 16 and a second leg 17. The first leg 16 is located in front of the second leg 17, and the top of the second leg 17 is fixedly connected to the first leg 16. The lock hole 12 is provided on the first leg 16, and the supporting tube 2 is plugged into the first leg 16. Among the two supporting legs 1, the two first legs 16 are fixedly connected by the second cross bar 6, and the two second legs 17 are fixedly connected by the third cross bar 8, and the foot pedal is installed on the second cross bar.

[0045] like Figure 3 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 and Fig.10As shown, in this embodiment, a first sliding sleeve 13 is fixed to the top of the first leg 16 of the support leg 1, and a second sliding sleeve 25 is fixed to the bottom of the support tube 2; the support tube 2 passes through the first sliding sleeve 13 and slides together, the second sliding sleeve 25 is located in the first leg 16 of the support leg 1 and slides together, and the first leg 16 of the support leg 1 and the support tube 2 are clearance-fitted. In this way, the support leg 1 and the support tube 2 are abutted by two sets of sliding sleeves, making the movement process of the chair frame more stable; and the sliding sleeve increases the gap between the support leg 1 and the support tube 2, thereby ensuring that the locking portion 43 of the first limit rod 4 always passes through the support tube 2, preventing the support tube 2 from being separated from the locking portion 43.

[0046] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, a second limiting rod 5 is further provided in the support tube 2, the first limiting rod 4 is connected to the third connecting hole 22 on the support tube 2 through the first shaft 42, so that the first limiting rod and the support tube are hinged, the second limiting rod 5 is slidably connected to the first shaft 42, and the bottom of the second limiting rod 5 extends out of the support tube 2 and is hinged to the support foot 1. Such a configuration can improve the stability of the chair frame movement.

[0047] like Figure 4 , Figure 5 , Figure 7 and Fig.10 As shown, further preferably, a second connecting hole 52 is opened on the second limiting rod 5, and the second axis is connected to the first connecting hole 11 on the supporting foot 1 through the second connecting hole 52 on the second limiting rod 5; the multiple first connecting holes 11 on the supporting foot 1 are arranged up and down, and the second axis is connected to the supporting foot 1 through the first connecting hole 11.

[0048] like Figure 5 and Figure 7 As shown, further preferably, a sliding hole 51 is formed on the second limiting rod 5, and the first shaft passes through the sliding hole 51 and slides in engagement therewith.

[0049] like Figure 4 As shown, further preferably, a guide groove is provided on the second sliding sleeve 25, and the second limiting rod 5 passes through the guide groove. Such an arrangement makes the movement of the chair frame more stable, and also makes the structure of the chair more compact, so that the chair frame can be thinner.

[0050] like Figure 4 , Figure 6 Figure 8 and Fig. 9As shown, in this embodiment, the locking driving member 45 includes a spring, and the two ends of the spring are respectively against the second limiting rod 5 and the support tube 2; the first limiting rod 4 is provided with a protruding limiting portion 44, the support tube 2 is provided with a third opening 23, a cover 46 is installed at the third opening 23, one end of the spring is sleeved on the limiting portion 44, and the other end of the spring is inserted into the cover 46. Such a configuration makes it easier to assemble and maintain the chair.

[0051] In this embodiment, the chair back 9 is mounted on the chair frame in a front-to-back adjustable manner; the front-to-back adjustable structure between the chair back 9 and the chair frame can refer to the prior art with publication number CN220631623U.

[0052] When adjusting the height of the chair frame, the user presses the pressing part 41 of the first limit rod 4 with both hands respectively, so that the first limit rod 4 swings, and the locking part 43 disengages from the locking hole 12 of the supporting foot 1, so that the spring is compressed; and then after moving the support frame to a suitable position, the user lets go, and the spring pushes the bottom of the first limit rod 4, so that the first limit rod 4 swings back to its original position, and the locking part 43 of the first limit rod 4 is inserted into the locking hole 12 of the supporting foot 1.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A chair with a liftable seat, comprising a retractable chair frame and a seat (10) mounted on the chair frame; characterized in that: The chair frame comprises a supporting foot (1), a supporting tube (2) and a first limiting rod (4); The support foot (1) is provided with a plurality of locking holes (12), and the plurality of locking holes (12) are arranged vertically; The seat (10) is mounted on a support tube (2); a first opening (21) and a second opening (24) are provided on the support tube (2); the support tube (2) is inserted into the support foot (1) and is slidably connected thereto; wherein the first opening (21) on the support tube (2) is located outside the support foot (1), and the second opening (24) on the support tube (2) is located inside the support foot (1); The first limiting rod (4) is located inside the support tube (2), the first limiting rod (4) is hinged to the support tube (2), and a pressing portion (41) and a locking portion (43) are provided on the first limiting rod (4); wherein the pressing portion (41) of the first limiting rod (4) extends out of the first opening (21) of the support tube (2), and the locking portion (43) of the first limiting rod (4) extends out of the second opening (24) of the support tube (2) and then plugs into the locking hole (12) on the support foot (1); The locking drive member (45) is arranged between the support tube (2) and the first limiting rod (4), and the locking drive member (45) is used to drive the first limiting rod (4) to be plugged into the locking hole (12).

2. A chair with a liftable seat according to claim 1, characterized in that: The two support tubes (2) are arranged corresponding to the two support feet (1), the two support feet (1) are fixedly connected, the two support tubes (2) are fixedly connected, and the two first limit rods (4) are respectively installed in the two support tubes (2).

3. A chair with a liftable seat according to claim 2, characterized in that: The two support tubes (2) are fixedly connected via a first cross bar (7), the seat (10) is mounted on the first cross bar (7), the two ends of the chair back (9) are respectively connected to the tops of the two support tubes (2), and the two armrests are mounted on both sides of the chair back (9); a foot pedal (61) is mounted on the support foot (1).

4. The chair with a liftable seat according to claim 2, characterized in that: The support leg (1) is in a herringbone shape, and comprises a first support leg (16) and a second support leg (17), the first support leg (16) is located in front of the second support leg (17), the top of the second support leg (17) is fixedly connected to the first support leg (16), the lock hole (12) is provided on the first support leg (16), and the support tube (2) is plugged into the first support leg (16); Of the two supporting legs (1), the two first supporting legs (16) are fixedly connected via a second crossbar (6), and the two second supporting legs (17) are fixedly connected via a third crossbar (8).

5. The chair with a liftable seat according to claim 1, characterized in that: A first sliding sleeve (13) is fixed to the top of the support foot (1), and a second sliding sleeve (25) is fixed to the bottom of the support tube (2); the support tube (2) passes through the first sliding sleeve (13) and is slidably fitted, the second sliding sleeve (25) is located in the support foot (1) and is slidably fitted, and the support foot (1) and the support tube (2) are clearance fitted.

6. The chair with a liftable seat according to claim 1, characterized in that: A second limiting rod (5) is also provided in the support tube (2); the first limiting rod (4) is hinged to the support tube (2) via a first shaft (42); the second limiting rod (5) is slidably connected to the first shaft (42); and the bottom of the second limiting rod (5) extends out from the support tube (2) and is hinged to the support foot (1).

7. The chair with a liftable seat according to claim 6, characterized in that: The second limiting rod (5) is connected to the first connection hole (11) on the supporting foot (1) via the second rotating shaft; the plurality of first connection holes (11) on the supporting foot (1) are arranged up and down, and the second rotating shaft is connected to the supporting foot (1) via the first connection hole (11).

8. The chair with a liftable seat according to claim 6, characterized in that: The second limiting rod (5) is provided with a sliding hole (51), and the first shaft (42) passes through the sliding hole (51) and is slidably engaged therewith.

9. The chair with a liftable seat according to claim 1, characterized in that: The locking drive member (45) comprises a spring, two ends of which respectively abut against the second limiting rod (5) and the support tube (2); a limiting portion (44) is protruded from the first limiting rod (4), a third opening (23) is provided on the support tube (2), a cover (46) is installed at the third opening (23), one end of the spring is sleeved on the limiting portion (44), and the other end of the spring is inserted into the cover (46).

10. The chair with a liftable seat according to claim 1, characterized in that: The first opening (21) is arranged on the front side of the support tube (2), and the second opening (24) is arranged on the rear side of the support tube (2).

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