Leg rest extension structure for high strength learning chair

Abstract

The utility model discloses a high -strength study chair's leg support stretching structure, including the cushion frame, the lower extreme fixed setting of cushion frame has two groups of fixed blocks, and the lower extreme fixed connection of each group fixed block has the limit cylinder, and the left end of limit cylinder is equipped with the cylinder cover through the first screw installation, and the limit cylinder is provided with the slide rod, and the left end of slide rod is fixedly connected with cylinder cover and support frame through the cylinder cover, and the front and back of support frame are all fixedly connected with the pivot, and the pivot of front and back is rotatably connected with a leg support, and the outside end of leg support rotatable connection place of pivot is equipped with the round hole groove, and the outside end of pivot is set in the round hole groove through leg support, and the adjusting knob of both sides is loosened, and the leg support is adjusted to be appropriately inclined through the pivot, thereby adjusting the inclination angle between leg support part and stretching structure part, and the leg support after adjusting is fixed through the adjusting knob of both sides, and the leg support after adjusting adapts to the leg posture preference of user.

Description

Technical Field

[0001] This utility model relates to the field of leg support technology for study chairs, specifically a high-strength leg support stretching structure for a study chair. Background Technology

[0002] After adjustment, the leg rest of a study chair is mainly used for leg support, helping users maintain a comfortable sitting posture and relieve leg fatigue when studying or sitting for long periods of time. High-strength study chair leg rests and extension structures typically use a metal frame (steel or aluminum) for the main body of the leg rest, covered with soft and breathable mesh, memory foam, or PU leather to provide comfortable support. The extension structure usually uses double limit guide cylinders or double guide rails to provide more stable support and better resistance to lateral bending and torsion. It is usually made of high-quality materials such as thick-walled aluminum alloy or high-carbon steel, with surface hardening treatment to improve strength. Because most of the main body of the leg rest and the extension structure are fixedly connected, the main body of the leg rest cannot be tilted according to the user's needs, and it is not suitable for different users' leg posture preferences. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0004] In view of the problems existing in the leg support stretching structure of the above and / or existing high-strength study chairs, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a high-strength leg support extension structure for a study chair. According to the user's needs, the adjustment knobs on both sides are loosened, and the leg support is rotated through the pivot to adjust the appropriate tilt, thereby adjusting the tilt angle between the leg support part and the extension structure part. Then, the adjusted leg support is fixed by tightening the adjustment knobs on both sides. The adjusted leg support is adapted to the user's leg posture preference.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] A high-strength study chair leg support extension structure includes a seat cushion frame. Two sets of fixing blocks are fixedly installed at the lower end of the seat cushion frame. A limiting cylinder is fixedly connected to the lower end of each set of fixing blocks. A cylinder cover is installed at the left end of the limiting cylinder via a first screw. A sliding rod is inserted through the limiting cylinder. The left end of the sliding rod passes through the cylinder cover and is fixedly connected to a support frame. Rotating shafts are fixedly connected to the front and rear sides of the support frame. The front and rear rotating shafts are rotatably connected to a leg support. An opening groove is provided on the leg support, and a handle is provided at the opening groove. The handle is fixedly connected to the left side of the support frame. A circular hole groove is provided at the outer end of the leg support at the rotating shaft connection point. The outer end of the rotating shaft passes through the leg support and is placed in the circular hole groove. The rotating shaft portion located in the circular hole groove is threadedly connected to an internally threaded cylinder. The outer end of the internally threaded cylinder passes through the circular hole groove and is fixedly connected to an adjustment knob.

[0008] As a preferred embodiment of the leg support stretching structure of the high-strength study chair described in this utility model, a through groove is provided at the center of the cylinder cover, and limiting grooves are provided on the front and rear sides of the through groove and the inner front and rear side walls of the limiting cylinder.

[0009] As a preferred embodiment of the leg support extension structure of the high-strength study chair described in this utility model, a limiting slider is fixedly provided on the front and rear sides of the slide rod, and the limiting slider is slidably connected to the inner wall of the limiting cylinder through a limiting groove.

[0010] As a preferred embodiment of the leg support extension structure of the high-strength study chair described in this utility model, a limiting plate is provided on the right side of the slide rod, and a second screw is provided through the limiting plate, with one end of the second screw threadedly connected to the slide rod.

[0011] As a preferred embodiment of the leg support extension structure of the high-strength study chair described in this utility model, an L-shaped positioning frame is fixedly and continuously installed on the front slide rod. The connection between the L-shaped positioning frame and the slide rod is located between the cylinder cover and the support frame. The front side of the L-shaped positioning frame is provided with slots at equal intervals.

[0012] As a preferred embodiment of the leg support extension structure of the high-strength study chair described in this utility model, the seat cushion frame includes a fixed plate frame fixedly disposed at the lower end of the seat cushion frame near the front left side, a pull rod is provided through the fixed plate frame, and a pull plate frame is fixedly connected to the front end of the pull rod.

[0013] As a preferred embodiment of the leg support extension structure of the high-strength study chair described in this utility model, the rear end of the pull rod is fixedly connected to a limiting plate, a locking block is fixedly connected to the rear side of the limiting plate, a spring is fixedly provided between the front side of the limiting plate and the rear side of the fixed plate frame, and the pull rod passes through the spring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: According to the user's needs, the pull rod is pulled by the pull plate frame, the limiting plate compresses the spring, and the locking block disengages from the slot. The pull handle acts on the support frame to pull the slide rod to slide and adjust in the limiting cylinder. After the leg support is adjusted to the appropriate position, the pull plate frame is released, and under the action of the spring, the locking block is pushed into the corresponding slot by the limiting plate to fix the leg support after adjustment. The adjustment knobs on both sides are loosened, and the leg support is rotated through the pivot to adjust the appropriate tilt, thereby adjusting the tilt angle between the leg support part and the tension structure part. Then, the adjustment knobs on both sides are tightened to fix the adjusted leg support. The adjusted leg support is adapted to the user's leg posture preference. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the L-shaped positioning frame and slot structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the rotating shaft, leg support, and circular hole groove structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the fixed plate frame, tie rod, limiting plate and locking block structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the limiting cylinder of this utility model;

[0021] Figure 6 This is a schematic diagram of the limiting cylinder and limiting slide groove structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the slide bar, limiting slider, and limiting plate of this utility model;

[0023] Figure 8 This is a schematic diagram of the internal threaded cylinder and adjusting knob of this utility model.

[0024] In the diagram: 1. Seat cushion frame; 101. Fixed plate frame; 102. Pull rod; 103. Limiting plate; 104. Locking block; 105. Spring; 106. Pull plate frame; 2. Fixed block; 3. Limiting cylinder; 4. Cylinder cover; 5. First screw; 6. Through groove; 7. Limiting slide groove; 8. Slide rod; 9. Limiting slider; 10. Limiting plate; 11. Support bracket; 12. Rotating shaft; 13. Leg rest; 14. Opening groove; 15. Handle; 16. Round hole groove; 17. Internal threaded cylinder; 18. Adjustment knob; 19. L-shaped positioning frame; 20. Locking groove. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] This utility model provides a leg support extension structure for a high-strength study chair. According to the user's needs, the adjustment knobs on both sides are loosened, and the leg support is rotated through the pivot to adjust the appropriate tilt, thereby adjusting the tilt angle between the leg support part and the extension structure part. Then, the adjustment knobs on both sides are tightened to limit and fix the adjusted leg support. The adjusted leg support is adapted to the user's leg posture preference.

[0029] Figures 1-8 The diagram shown is an overall structural schematic of one embodiment of the leg support extension structure of a high-strength study chair according to this utility model. Please refer to [link / reference]. Figures 1-8This embodiment of a high-strength study chair leg support extension structure includes a seat cushion frame 1. Two sets of fixing blocks 2 are fixedly installed at the lower end of the seat cushion frame 1. A limiting cylinder 3 is fixedly connected to the lower end of each set of fixing blocks 2. A cylinder cover 4 is installed at the left end of the limiting cylinder 3 via a first screw 5. A sliding rod 8 is inserted through the limiting cylinder 3. The left end of the sliding rod 8 passes through the cylinder cover 4 and is fixedly connected to a support frame 11. Rotating shafts 12 are fixedly connected to the front and rear sides of the support frame 11. The front and rear rotating shafts 12 and a leg support... 13 is rotatably connected. An opening groove 14 is provided on the leg support 13. A handle 15 is provided at the opening groove 14. The handle 15 is fixedly connected to the left side of the support bracket 11. A round hole groove 16 is provided at the outer end of the leg support 13 at the rotatable connection of the rotating shaft 12. The outer end of the rotating shaft 12 passes through the leg support 13 and is located in the round hole groove 16. The part of the rotating shaft 12 located in the round hole groove 16 is threadedly connected to the internal threaded cylinder 17. The outer end of the internal threaded cylinder 17 passes through the round hole groove 16 and is fixedly connected to the adjustment knob 18.

[0030] The cylinder cover 4 is installed and fixed on the limiting cylinder 3 by the first screw 5 for limiting and preventing detachment. The first screw 5 is removed to facilitate the removal of the cylinder cover 4. The adjustment knobs 18 on both sides are loosened, and the leg support 13 is rotated through the pivot 12 to adjust the appropriate tilt, thereby adjusting the tilt angle between the leg support 13 and the tension structure. The adjusted leg support 13 is then limited and fixed by tightening the adjustment knobs 18 on both sides. The adjusted leg support 13 is adapted to the user's leg posture preference. A disc spring is provided through the outer ring of the internal thread cylinder 17. The disc spring is located between the adjustment knob 18 and the leg support 13 to enhance the limiting stability of the leg support 13 after the adjustment knob 18 is tightened.

[0031] A through groove 6 is provided at the center of the cylinder cover 4. Limiting grooves 7 are provided on the front and rear sides of the through groove 6 and the inner front and rear side walls of the limiting cylinder 3. Limiting sliders 9 are fixedly provided on the front and rear sides of the slide rod 8. The limiting sliders 9 are slidably connected to the inner wall of the limiting cylinder 3 through the limiting grooves 7. A limiting plate 10 is provided on the right side of the slide rod 8. A second screw is provided through the limiting plate 10, and one end of the second screw is threaded to the slide rod 8.

[0032] The slide rod 8 and the limiting plate 10 are connected and fixed by a second screw, which facilitates the connection and disassembly between the limiting plate 10 and the slide rod 8. After the limiting plate 10 is installed on the slide rod 8, it slides and adjusts within the limiting cylinder 3. Finally, the limiting plate 10 is limited by the cylinder cover 4 to prevent the limiting plate 10 from sliding out and detaching from the limiting cylinder 3. The limiting plate 10 is then removed, making it easier for the cylinder cover 4 to be pulled out and removed from the outside of the slide rod 8. The slide rod 8 slides within the limiting groove 7 through the limiting slider 9, which enhances the stability of the slide rod 8's movement within the limiting cylinder 3. The limiting groove 7 in the through groove 6 corresponds to the limiting groove 7 in the limiting cylinder 3.

[0033] An L-shaped positioning frame 19 is fixedly installed on the front slide rod 8. The connection between the L-shaped positioning frame 19 and the slide rod 8 is located between the cylinder cover 4 and the support bracket 11. The front side of the L-shaped positioning frame 19 is provided with slots 20 at equal intervals.

[0034] The L-shaped positioning frame 19 has equally spaced slots 20 for adjusting the position of the leg support 13 after the slide rod 8 is pulled out. The slots 20 are then inserted into the corresponding slots 20 by the locking block 104 to limit and fix the tension structure.

[0035] The seat cushion frame 1 includes a fixed plate frame 101 fixedly installed at the lower end of the seat cushion frame 1 near the front left side. A pull rod 102 is provided through the fixed plate frame 101. A pull plate frame 106 is fixedly connected to the front end of the pull rod 102. A limit plate 103 is fixedly connected to the rear end of the pull rod 102. A locking block 104 is fixedly connected to the rear side of the limit plate 103. A spring 105 is fixedly installed between the front side of the limit plate 103 and the rear side of the fixed plate frame 101. The pull rod 102 passes through the spring 105.

[0036] Pulling the pull rod 102 by the pull plate frame 106 compresses the spring 105 of the limiting plate 103, causing the locking block 104 to disengage from the slot 20. The pull handle 15 acts on the support bracket 11 to pull the slide rod 8 to slide and adjust within the limiting cylinder 3. After the leg support 13 is adjusted to the appropriate position, the pull plate frame 106 is released. Under the action of the spring 105, the locking block 104 is pushed into the corresponding slot 20 by the limiting plate 103, thus limiting and fixing the adjusted slide rod 8. When the locking block 104 is locked in, it may be locked into the slot 20 exactly, or the locking block 104 may be located between the slots 20 on both sides and not locked into the slot 20. In this case, simply pull or push the handle 15 slightly to adjust it so that the locking block 104 is locked in.

[0037] Combination Figures 1-8 The specific usage process of the leg support extension structure of a high-strength study chair in this embodiment is as follows: Pulling the pull rod 102 by the pull plate frame 106 causes the limiting plate 103 to compress the spring 105, causing the locking block 104 to disengage from the slot 20. The pull handle 15 acts on the support bracket 11 to pull the slide rod 8 to slide and adjust within the limiting cylinder 3. After the leg support 13 is adjusted to an appropriate position, the pull plate frame 106 is released. Under the action of the spring 105, the limiting plate 103 pushes the locking block 104 into the corresponding slot 20, limiting and fixing the adjusted slide rod 8. Loosening the adjustment knobs 18 on both sides allows the leg support 13 to be rotated and adjusted to a suitable tilt via the pivot 12, thereby adjusting the tilt angle between the leg support 13 and the extension structure. Finally, tightening the adjustment knobs 18 on both sides limits and fixes the adjusted leg support 13. The adjusted leg support 13 adapts to the user's leg posture preference.

[0038] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A leg support extension structure for a high-strength study chair, comprising a seat cushion frame (1), characterized in that: Two sets of fixing blocks (2) are fixedly installed at the lower end of the seat cushion frame (1). Each set of fixing blocks (2) is fixedly connected to a limiting cylinder (3) at the lower end. A cylinder cover (4) is installed at the left end of the limiting cylinder (3) by a first screw (5). A sliding rod (8) is installed through the limiting cylinder (3). The left end of the sliding rod (8) is fixedly connected to the cylinder cover (4) and the support frame (11). A rotating shaft (12) is fixedly connected to both the front and rear sides of the support frame (11). The front and rear rotating shafts (12) are rotatably connected to a leg rest (13). The leg rest (13) has an opening An opening slot (14) is provided, and a handle (15) is provided at the opening slot (14). The handle (15) is fixedly connected to the left side of the support frame (11). The leg support (13) is provided with a round hole slot (16) at the outer end of the rotating shaft (12). The outer end of the rotating shaft (12) passes through the leg support (13) and is located in the round hole slot (16). The part of the rotating shaft (12) located in the round hole slot (16) is threadedly connected to the internal threaded cylinder (17). The outer end of the internal threaded cylinder (17) passes through the round hole slot (16) and is fixedly connected to the adjustment knob (18).

2. The leg support extension structure of a high-strength study chair according to claim 1, characterized in that: The cylinder cover (4) has a through groove (6) at its center, and the front and rear sides of the through groove (6) and the inner front and rear side walls of the limiting cylinder (3) are provided with limiting grooves (7).

3. The leg support extension structure of a high-strength study chair according to claim 1, characterized in that: The sliding rod (8) is fixedly provided with a limiting slider (9) on the front and rear sides. The limiting slider (9) is slidably connected to the inner wall of the limiting cylinder (3) through the limiting groove (7).

4. The leg support extension structure of a high-strength study chair according to claim 1, characterized in that: A limiting plate (10) is provided on the right side of the slide rod (8), and a second screw is provided through the limiting plate (10), with one end of the second screw threadedly connected to the slide rod (8).

5. The leg support extension structure of a high-strength study chair according to claim 1, characterized in that: An L-shaped positioning frame (19) is fixedly installed on the sliding rod (8) on the front side. The connection between the L-shaped positioning frame (19) and the sliding rod (8) is located between the cylinder cover (4) and the support frame (11). The front side of the L-shaped positioning frame (19) is provided with slots (20) at equal intervals.

6. The leg support extension structure of a high-strength study chair according to claim 1, characterized in that: The seat cushion frame (1) includes a fixed plate frame (101) fixedly installed at the lower end of the seat cushion frame (1) near the front left side. A pull rod (102) is provided through the fixed plate frame (101), and a pull plate frame (106) is fixedly connected to the front end of the pull rod (102).

7. The leg support extension structure of a high-strength study chair according to claim 6, characterized in that: The rear end of the pull rod (102) is fixedly connected to a limiting plate (103), and a locking block (104) is fixedly connected to the rear side of the limiting plate (103). A spring (105) is fixedly provided between the front side of the limiting plate (103) and the rear side of the fixed plate frame (101), and the pull rod (102) passes through the spring (105).

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