Chair

Abstract

The utility model relates to the technical field of educational equipment, and discloses a chair which comprises a supporting underframe, a chair seat surface and a chair backrest, a track frame is arranged at the upper end of the supporting underframe, an L-shaped sliding strip is slidably arranged on the track frame, the upper end of the L-shaped sliding strip is connected with the chair seat surface, and a position adjusting assembly is arranged at the middle end of the lower end surface of the chair seat surface. A U-shaped seat is fixedly arranged at one end, close to the chair backrest, of the track frame, a height adjusting assembly is arranged on the upper end surface of the U-shaped seat, and a backrest supporting seat is arranged at the upper end of the height adjusting assembly. According to the chair, the position adjusting assembly is arranged, the threaded rod can be effectively driven to synchronously rotate by rotating the rotary knob, the driving block drives the chair seat surface to move forwards along the track frame through rotation of the threaded rod, the chair backrest can be put down in the next step conveniently, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of educational equipment, and specifically relates to a chair. Background Art

[0002] Desks and chairs are important furniture that are indispensable in students' study and life. With the continuous development of education and people's attention to the learning environment, the desks and chairs market is also growing continuously.

[0003] Currently, with the increase in middle school students' courses, the learning pressure on students has increased. Middle school students often need to take a lunch break to ensure a better state of study in the afternoon. The existing chairs for middle school students have relatively single structural functions. Generally, the backrest of the chair cannot be laid down, and students need to lie on the desk to rest, resulting in poor comfort.

[0004] Some chairs can adjust the angle of the backrest. However, when students lean on the backrest, as the body center of gravity changes and moves backward, it is easy to cause the students and the chair to fall down together, and the use effect is poor. Therefore, there is a need to provide a chair to solve the above problems. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a chair to solve the problems mentioned in the above background.

[0006] The utility model provides the following technical solutions: A chair, comprising:

[0007] Support chassis, there are two support chassis, and the two support chassis are arranged in parallel;

[0008] Chair seat surface, the chair seat surface is arranged above the support chassis;

[0009] Chair backrest, the chair backrest is rotatably arranged at one end of the chair seat surface;

[0010] An upper end of the support chassis is provided with an orbital frame, an L-shaped sliding bar is slidably arranged on the orbital frame, an upper end of the L-shaped sliding bar is connected to the chair seat surface, a position adjusting component is arranged at a middle end of a lower surface of the chair seat surface, a U-shaped seat is fixedly arranged at an end of the orbital frame close to the chair backrest, a height adjusting component is arranged on an upper surface of the U-shaped seat, and a backrest support seat is arranged at an upper end of the height adjusting component.

[0011] Preferably, the position adjusting component includes a threaded rod, a knob and a driving block, one end of the threaded rod is a smooth shaft, and the smooth shaft of the threaded rod passes through the U-shaped seat and is fixedly connected to the knob.

[0012] Preferably, the threaded rod is rotatably connected to the U-shaped seat, the threaded rod is threadedly connected to the driving block, and an upper end of the driving block is fixedly connected to the chair seat surface.

[0013] Preferably, the height adjustment assembly includes a limit vertical column, a vertical frame, a strip-shaped cross plate and a support vertical column. The limit vertical column is fixedly arranged at the center of the upper surface of the U-shaped seat. The strip-shaped cross plate is slidably sleeved on the outer surface of the limit vertical column. There are two support vertical columns, and the two support vertical columns are respectively arranged at both ends of the upper surface of the strip-shaped cross plate.

[0014] Preferably, the upper end of the support vertical column is connected to the backrest support seat. Positioning plates are fixedly arranged on both sides of the lower surface of the strip-shaped cross plate and located on both sides of the limit vertical column. Limit convex columns are fixedly arranged at the centers of the mutually facing sides of the two positioning plates.

[0015] Preferably, a slidable positioning column is sleeved at one end of the limit convex column away from the positioning plate. A handle is sleeved on the outer surface of the positioning column, and a return spring is arranged between the handle and the positioning plate.

[0016] Preferably, the handle is slidably connected to the strip-shaped cross plate, and a plurality of positioning holes cooperating with the positioning column are equidistantly arranged on the vertical frame.

[0017] Preferably, a cylindrical clamping strip is arranged at the upper end of the backrest support seat. A plurality of clamping grooves cooperating with the cylindrical clamping strip are arranged on the back of the chair back. Armrests are arranged on both sides of the track frame.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. For this chair, by providing a position adjustment assembly, by rotating the knob, the threaded rod can be effectively driven to rotate synchronously. Through the rotation of the threaded rod, the driving block is realized to drive the chair seat surface to move forward along the track frame, which is convenient for the next step of reclining the chair back. The operation is simple, and the stability of the chair is ensured when the student lies down.

[0020] 2. For this chair, when reclining the chair back, by providing a backrest support seat, the chair back can be effectively supported. By clamping the provided cylindrical clamping strip into the clamping groove, the stability of the chair back is further effectively ensured. By providing armrests, the students can be effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is one of the overall structural schematic diagrams of the chair of the present invention;

[0022] Figure 2 is the second overall structural schematic diagram of the chair of the present invention;

[0023] Figure 3 is the structural schematic diagram of the chair back of the present invention after reclining;

[0024] Figure 4Schematic diagram of the installation structure of the height adjustment component and the position adjustment component of the present utility model;

[0025] Figure 5 Partial structural schematic diagram of the height adjustment component of the present utility model;

[0026] Figure 6 For the present utility model Figure 2 Enlarged schematic diagram of the structure at position A in the present utility model.

[0027] In the figure: 1, support chassis; 2, track frame; 201, L-shaped slide bar; 3, chair seat surface; 301, chair backrest; 302, card slot; 4, armrest; 5, U-shaped seat; 6, height adjustment component; 601, limit upright column; 602, vertical frame; 603, strip-shaped cross plate; 604, support upright column; 605, positioning plate; 606, positioning column; 607, handle; 608, return spring; 609, limit convex column; 7, backrest support seat; 701, cylindrical card strip; 8, position adjustment component; 801, threaded rod; 802, knob; 803, drive block. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1-6 , a chair, comprising:

[0030] Support chassis 1, there are two support chassis 1, and the two support chassis 1 are arranged in parallel;

[0031] Chair seat surface 3, the chair seat surface 3 is arranged above the support chassis 1;

[0032] Chair backrest 301, the chair backrest 301 is rotatably arranged at one end of the chair seat surface 3;

[0033] The upper end of the support chassis 1 is provided with a track frame 2, an L-shaped slide bar 201 is slidably arranged on the track frame 2, the upper end of the L-shaped slide bar 201 is connected to the chair seat surface 3, a position adjustment component 8 is arranged in the middle of the lower end surface of the chair seat surface 3, a U-shaped seat 5 is fixedly arranged at one end of the track frame 2 close to the chair backrest 301, a height adjustment component 6 is arranged on the upper end surface of the U-shaped seat 5, and a backrest support seat 7 is arranged on the upper end of the height adjustment component 6.

[0034] Among them; the position adjustment component 8 includes a threaded rod 801, a knob 802 and a driving block 803. One end of the threaded rod 801 is a smooth shaft. The smooth shaft of the threaded rod 801 passes through the U-shaped seat 5 and is fixedly connected to the knob 802. The threaded rod 801 is rotatably connected to the U-shaped seat 5. The threaded rod 801 is threadedly connected to the driving block 803. The upper end of the driving block 803 is fixedly connected to the chair seat surface 3. By rotating the knob 802, the threaded rod 801 can be effectively driven to rotate synchronously. By the rotation of the threaded rod 801, the driving block 803 drives the chair seat surface 3 to move forward along the track frame 2, which is convenient for the next step of laying down the chair backrest 301, and the operation is simple.

[0035] Among them; the height adjustment component 6 includes a limit upright column 601, a vertical frame 602, a strip-shaped cross plate 603 and a support upright column 604. The limit upright column 601 is fixedly arranged at the center of the upper surface of the U-shaped seat 5. The strip-shaped cross plate 603 is slidably sleeved on the outer surface of the limit upright column 601. There are two support upright columns 604, and the two support upright columns 604 are respectively arranged at both ends of the upper surface of the strip-shaped cross plate 603. The upper end of the support upright column 604 is connected to the backrest support seat 7. Positioning plates 605 are fixedly arranged on both sides of the lower surface of the strip-shaped cross plate 603 and on both sides of the limit upright column 601. Limit convex columns 609 are fixedly arranged at the centers of the mutually facing sides of the two positioning plates 605. By providing the limit upright column 601, it is convenient to install the strip-shaped cross plate 603 and realize the vertical movement of the strip-shaped cross plate 603.

[0036] Among them; a slidable positioning column 606 is sleeved at one end of the limit convex column 609 away from the positioning plate 605. A handle 607 is sleeved on the outer surface of the positioning column 606. A return spring 608 is arranged between the handle 607 and the positioning plate 605. The handle 607 is slidably connected to the strip-shaped cross plate 603. A number of positioning holes cooperating with the positioning column 606 are equidistantly arranged on the vertical frame 602. By holding the two handles 607 and squeezing the return spring 608 and approaching each other, the two positioning columns 606 are driven to move synchronously during the movement of the handle 607. The end of the positioning column 606 disengages from the positioning hole. Furthermore, the up and down movement of the strip-shaped cross plate 603 can be controlled by the handle 607, effectively adjusting the height of the backrest support seat 7. After the adjustment is completed, the handle 607 is released, and the return spring 608 releases energy, pushing the front end of the positioning column 606 to snap into a new positioning hole, which is convenient for adjusting the angle of the chair backrest 301 according to needs.

[0037] Among them; a cylindrical card strip 701 is arranged at the upper end of the backrest support seat 7. A number of card slots 302 cooperating with the cylindrical card strip 701 are arranged on the back surface of the chair backrest 301. Armrests 4 are arranged on both sides of the track frame 2. When laying down the chair backrest 301, by snapping the provided cylindrical card strip 701 into the card slot 302, the stability of the chair backrest 301 is effectively further ensured. By providing the armrests 4, the students can be effectively protected.

[0038] Working principle: By providing an orbital frame 2 and an L-shaped slider 201, the sliding of the chair seat surface 3 can be realized. By rotating the knob 802, the threaded rod 801 can be effectively driven to rotate synchronously. Through the rotation of the threaded rod 801, the driving block 803 is realized to drive the chair seat surface 3 to move forward along the orbital frame 2, which is convenient for the next step of reclining the chair backrest 301. The operation is simple. When reclining the chair backrest 301, by providing a backrest support seat 7, the chair backrest 301 can be effectively supported. By inserting the provided cylindrical clamping strip 701 into the clamping groove 302, the stability of the chair backrest 301 is further effectively ensured. By providing an armrest 4, the students can be effectively protected.

[0039] Furthermore, by holding the two handles 607 and squeezing the return spring 608 and approaching each other, the two positioning columns 606 are driven to move synchronously during the movement of the handle 607, and the end parts of the positioning columns 606 are disengaged from the positioning holes. Then, the up-and-down movement of the strip-shaped cross plate 603 can be controlled by the handle 607, so as to effectively adjust the height of the backrest support seat 7. After the adjustment is completed, the handle 607 is released, and the return spring 608 releases energy to push the front end of the positioning column 606 to be clamped into a new positioning hole, which is convenient for adjusting the angle of the chair backrest 301 according to needs.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chair, comprising: A supporting base frame (1), wherein two supporting base frames (1) are provided, and the two supporting base frames (1) are arranged in parallel; A chair seat (3), wherein the chair seat (3) is arranged above the supporting base frame (1); A chair backrest (301), wherein the chair backrest (301) is rotatably arranged at one end of the chair seat surface (3); The invention is characterized in that a track frame (2) is provided at the upper end of the support frame (1), an L-shaped slide bar (201) is slidably provided on the track frame (2), the upper end of the L-shaped slide bar (201) is connected to the chair seat (3), a position adjustment component (8) is provided at the middle end of the lower end surface of the chair seat (3), a U-shaped seat (5) is fixedly provided at one end of the track frame (2) close to the chair backrest (301), a height adjustment component (6) is provided on the upper end surface of the U-shaped seat (5), and a backrest support seat (7) is provided at the upper end of the height adjustment component (6).

2. A chair according to claim 1, characterized in that: The position adjustment assembly (8) comprises a threaded rod (801), a knob (802) and a driving block (803); one end of the threaded rod (801) is a smooth shaft; the smooth shaft of the threaded rod (801) passes through a U-shaped seat (5) and is fixedly connected to the knob (802).

3. A chair according to claim 2, characterized in that: The threaded rod (801) is rotatably connected to the U-shaped seat (5), the threaded rod (801) is threadably connected to the driving block (803), and the upper end of the driving block (803) is fixedly connected to the chair seat surface (3).

4. A chair according to claim 1, characterized in that: The height adjustment assembly (6) comprises a limiting column (601), a vertical frame (602), a strip-shaped horizontal plate (603) and a supporting column (604); the limiting column (601) is fixedly arranged at the center of the upper surface of the U-shaped seat (5); the strip-shaped horizontal plate (603) is slidably sleeved on the outer surface of the limiting column (601); and two supporting columns (604) are provided, and the two supporting columns (604) are respectively arranged at two ends of the upper surface of the strip-shaped horizontal plate (603).

5. A chair according to claim 4, characterized in that: The upper end of the support column (604) is connected to the backrest support seat (7), and positioning plates (605) are fixedly provided on the lower end surface of the strip-shaped horizontal plate (603) and on both sides of the limiting column (601), and the two positioning plates (605) are fixedly provided with limiting protrusions (609) at the centers of the sides facing away from each other.

6. A chair according to claim 5, characterized in that: A slidable positioning column (606) is sleeved on one end of the limiting boss (609) away from the positioning plate (605), a handle (607) is sleeved on the outer surface of the positioning column (606), and a return spring (608) is arranged between the handle (607) and the positioning plate (605).

7. A chair according to claim 6, characterized in that: The handle (607) is slidably connected to the strip-shaped horizontal plate (603), and a plurality of positioning holes cooperating with the positioning columns (606) are provided at equal intervals on the vertical frame (602).

8. The chair according to claim 1, characterized in that: The upper end of the backrest support seat (7) is provided with a columnar clamping strip (701), the back of the chair backrest (301) is provided with a plurality of clamping grooves (302) that cooperate with the columnar clamping strip (701), and armrests (4) are provided on both sides of the track frame (2).

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