Portable folding chair

Abstract

The utility model provides a portable folding chair which comprises a seat, a backrest and a leg pad, the two sides of the seat are respectively hinged to the backrest and the leg pad, the turnover angle of the leg pad relative to the seat is adjusted through a first supporting structure, then the height of the seat is adjusted through a second supporting structure, and through the matching of an inserting rod and an inserting hole, the height of the leg pad is adjusted. When the folding chair needs to be used, the leg cushion can be unfolded, the height of the seat is increased, and the backrest is adjusted to a proper position, and when the folding chair does not need to be used, the leg cushion can be folded below the seat, the height of the seat is reduced, and the backrest can be folded above the seat, so that the folding chair is convenient to move or carry.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a portable folding chair. Background Technology

[0002] When dental patients undergo oral treatment or examinations, they need to sit in a dental chair or lie semi-reclined on it to facilitate the dentist's examination and treatment. The dentist needs to frequently adjust the patient's head and body height, as well as the tilt angle of the head, to achieve the optimal height and angle for treatment, while also ensuring the patient is in a comfortable position. This necessitates that the dental chair be easily adjustable to accommodate the patient's head and body position.

[0003] In practical use, dental chairs take up a lot of space, making them inconvenient for doctors to move or carry when they go out for diagnosis and treatment. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a portable folding chair, which aims to solve the problem that the dental chair itself occupies a large space and is inconvenient for doctors to move or carry when they go out for diagnosis and treatment.

[0005] This utility model provides a portable folding chair, including a seat, a backrest, and a leg pad. The backrest and the leg pad are hinged to both sides of the seat, respectively. A first support structure is provided between the seat and the leg pad, which is used to adjust the flip angle of the leg pad relative to the seat. A second support structure is provided at the bottom of the seat, which is used to adjust the height of the seat. The backrest has a plurality of insertion holes distributed around the hinge point of the seat and the backrest. The seat has a retractable insertion rod, which is used to insert into different insertion holes to fix the flip angle between the seat and the backrest.

[0006] Furthermore, the seat is provided with a first sleeve, the first sleeve having a first through hole through which the plug rod can pass, the first through hole having a first limiting step, the plug rod having a first limiting baffle, and a first spring being provided between the first limiting step and the first limiting baffle, the first spring being used to drive the plug rod to be inserted into the plug hole.

[0007] Furthermore, the first sleeve has a first notch, and the plug rod has a handle extending radially. The extension length of the handle is greater than the diameter of the first sleeve. The first notch is used to allow the handle to be inserted when the plug rod is inserted into the plug hole.

[0008] Furthermore, a limiting groove is formed on the end face of the first sleeve, the limiting groove being used to accommodate the handle to restrict the rotation of the handle.

[0009] Furthermore, the first sleeve is threadedly connected to the seat.

[0010] Furthermore, armrests are rotatably connected to both sides of the seat, and the armrests can be rotated to adjust their position on the seat.

[0011] Furthermore, the seat is provided with a second sleeve, the second sleeve having a second through hole through which the insertion rod can pass, the second through hole having a second limiting step, the armrest having a horizontal bar and a vertical bar, the horizontal bar and the vertical bar being vertically connected, the horizontal bar having a second limiting baffle, the second limiting step and the second limiting baffle having a second spring, the second sleeve having a second notch, the second spring being used to drive the vertical rod to insert into the second notch.

[0012] Furthermore, there are two second gaps, which are symmetrically arranged and located on the same vertical plane.

[0013] Furthermore, the first support structure includes a first support frame and a first fastener. One side of the first support frame is hinged to the seat, and the other side is detachably connected to the leg pad via the first fastener.

[0014] Furthermore, the second support structure includes a base, a second support frame, and a second fastener. One side of the second support frame is hinged to the base, and the other side is detachably connected to the seat via the second fastener.

[0015] Beneficial effects: This utility model provides a portable folding chair, including a seat, a backrest, and leg pads. The backrest and leg pads are hinged to both sides of the seat. In this application, the rotation angle of the leg pads relative to the seat is adjusted by a first support structure, and the height of the seat is adjusted by a second support structure. With the cooperation of the plug rod and the plug hole, when the folding chair is needed, the leg pads can be unfolded, the height of the seat is raised, and the backrest is adjusted to a suitable position. When the folding chair is not needed, the leg pads can be folded under the seat, the height of the seat is lowered, and the backrest can be folded on top of the seat, thus facilitating moving or carrying. Attached Figure Description

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

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0019] Figure 4 A cross-sectional view showing the connection between the first sleeve and the plug rod;

[0020] Figure 5 This is a cross-sectional view of the connection between the second sleeve and the crossbar.

[0021] In the diagram: 1. Seat; 11. Connecting rod; 111. First limiting baffle; 12. First sleeve; 121. First through hole; 122. First limiting step; 123. First notch; 124. Handle; 125. Limiting groove; 13. First spring; 14. Armrest; 141. Horizontal bar; 142. Vertical bar; 143. Second limiting baffle; 15. Second sleeve; 151. Second through hole; 152. Second limiting step; 153. Second notch; 16. Second spring; 2. Backrest; 21. Connecting hole; 3. Leg pad; 4. First support structure; 41. First support frame; 42. First fastener; 5. Second support structure; 51. Base; 52. Second support frame; 53. Second fastener. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figures 1 to 5 This utility model provides a portable folding chair, including a seat 1, a backrest 2, and a leg pad 3. The backrest 2 and the leg pad 3 are hinged to both sides of the seat 1, respectively. A first support structure 4 is provided between the seat 1 and the leg pad 3. The first support structure 4 is used to adjust the flip angle of the leg pad 3 relative to the seat 1. A second support structure 5 is provided at the bottom of the seat 1. The second support structure 5 is used to adjust the height of the seat 1. The backrest 2 has a plurality of insertion holes 21, which are distributed around the hinge point of the seat 1 and the backrest 2. The seat 1 is provided with a retractable insertion rod 11, which is used to insert into different insertion holes 21 to fix the flip angle between the seat 1 and the backrest 2.

[0024] Specifically, in this application, the first support structure 4 adjusts the flip angle of the leg pad 3 relative to the seat 1, and the second support structure 5 adjusts the height of the seat 1. Through the cooperation of the connecting rod 11 and the connecting hole 21, when a folding chair is needed, the leg pad 3 can be unfolded, the height of the seat 1 can be raised, and the backrest 2 can be adjusted to a suitable position. When the folding chair is not needed, the leg pad 3 can be folded under the seat 1, the height of the seat 1 can be lowered, and the backrest 2 can be folded above the seat 1, thus facilitating movement or carrying. Specifically, there are three connecting holes 21. When the connecting rod 11 is inserted into the connecting hole 21, the backrest 2 can be held at positions of 15º, 60º, and 75º.

[0025] In one feasible embodiment, the seat 1 is provided with a first sleeve 12, the first sleeve 12 having a first through hole 121 through which the insertion rod 11 can pass. A first limiting step 122 is provided within the first through hole 121, and the insertion rod 11 is provided with a first limiting baffle 111. A first spring 13 is provided between the first limiting step 122 and the first limiting baffle 111, and the first spring 13 is used to drive the insertion rod 11 into the insertion hole 21. In this embodiment, when the insertion rod 11 is inserted into the first through hole 121, the first spring 13 is in a compressed state. The spring force pushes the first limiting baffle 111, and under the action of the first limiting baffle 111, the insertion rod 11 remains inserted into the insertion hole 21, improving the stability of the backrest 2. When it is necessary to adjust the angle of the backrest 2, the insertion rod 11 is pulled out in the opposite direction, causing the insertion rod 11 to disengage from the insertion hole 21, and the first spring 13 is further compressed. At this time, the backrest 2 can rotate relative to the seat 1, and the backrest 2 can be adjusted to the required angle or folded up.

[0026] In one feasible embodiment, the first sleeve 12 has a first notch 123, and the insertion rod 11 has a radially extending handle 124. The extension length of the handle 124 is greater than the diameter of the first sleeve 12. The first notch 123 is used to allow the handle 124 to be inserted when the insertion rod 11 is inserted into the insertion hole 21. In this embodiment, the handle 124 facilitates the insertion and removal of the insertion rod 11. The first notch 123 is configured to allow sufficient travel for the handle 124 when the insertion rod 11 is inserted into the insertion hole 21.

[0027] In one feasible embodiment, a limiting groove 125 is formed on the end face of the first sleeve 12. The limiting groove 125 is used to accommodate the handle 124 to restrict the rotation of the handle 124. In this embodiment, when the handle 124 pulls the plug rod 11 out of the plug hole 21, the handle 124 also disengages from the first notch 123. After the handle 124 disengages from the first notch 123, the plug rod 11 is rotated by the handle 124, causing the plug rod 11 to rotate to the position of the limiting groove 125. Since the first spring 13 has been further compressed, when the handle 124 is released, under the elastic force of the first spring 13, the handle 124 abuts against the limiting groove 125. Thus, the limiting groove 125 can restrict the rotation of the handle 124, so that when adjusting the angle of the backrest 2, the handle 124 loosens, causing the plug rod 11 to be inserted into the plug hole 21 before being adjusted to the appropriate position.

[0028] In one feasible implementation, the first sleeve 12 is threadedly connected to the seat 1, thereby facilitating the installation of components such as the plug rod 11 and the first spring 13 inside the first sleeve 12.

[0029] In one feasible implementation, armrests 14 are rotatably connected to both sides of the seat 1, and the armrests 14 can be rotated to adjust their position on the seat 1. When the armrests 14 need to be raised, they are rotated to a vertical position and above the seat 1 to support the hands of the doctor or patient; when the armrests 14 need to be folded, they are rotated to a vertical position and below the seat 1 to save space occupied by the armrests 14.

[0030] In one feasible embodiment, the seat 1 is provided with a second sleeve 15, the second sleeve 15 having a second through hole 151 through which the insertion rod 11 passes, and a second limiting step 152 provided within the second through hole 151. The armrest 14 is provided with a horizontal bar 141 and a vertical bar 142, the horizontal bar 141 and the vertical bar 142 being vertically connected, the horizontal bar 141 having a second limiting baffle 143, and a second spring 16 being provided between the second limiting step 152 and the second limiting baffle 143. The second sleeve 15 has a second notch 153, and the second spring 16 is used to drive the vertical bar 142 to insert into the second notch 153. In this embodiment, the setting of the second notch 153 can ensure that the armrest 14 remains in the vertical direction, whether supporting the hand or folding to save space, it is stable in the vertical direction. The second spring 16 drives the horizontal bar 141 to be stably engaged in the second notch 153.

[0031] In one feasible embodiment, two second notches 153 are provided, and the two second notches 153 are symmetrically arranged and located on the same vertical plane. The two second notches 153 are respectively used to engage the crossbar 141 when the handrail 14 needs to be supported and when it needs to be folded.

[0032] In one feasible implementation, the first support structure 4 includes a first support frame 41 and a first fastener 42. One side of the first support frame 41 is hinged to the seat 1, and the other side is detachably connected to the leg pad 3 via the first fastener 42. Specifically, the first fastener 42 is a bolt, which enables the detachable connection between the first support frame 41 and the leg pad 3.

[0033] In one feasible embodiment, the second support structure 5 includes a base 51, a second support frame 52, and a second fastener 53. One side of the second support frame 52 is hinged to the base 51, and the other side is detachably connected to the seat 1 via the second fastener 53. Specifically, the second support frame 52 includes several connecting rods, including two parallel connecting rods and one intersecting connecting rod. The two ends of the connecting rods are respectively hinged to the base 51 and the seat 1. The first fastener 42 is also a bolt, which enables the detachable connection between the connecting rod and the leg pad 3.

[0034] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A portable folding chair, characterized in that: The device includes a seat (1), a backrest (2), and a leg pad (3). The backrest (2) and the leg pad (3) are hinged to the two sides of the seat (1), respectively. A first support structure (4) is provided between the seat (1) and the leg pad (3). The first support structure (4) is used to adjust the flip angle of the leg pad (3) relative to the seat (1). A second support structure (5) is provided at the bottom of the seat (1). The second support structure (5) is used to adjust the height of the seat (1). The backrest (2) has several insertion holes (21). The insertion holes (21) are distributed around the hinge point of the seat (1) and the backrest (2). The seat (1) is provided with a retractable insertion rod (11). The insertion rod (11) is used to insert into different insertion holes (21) to fix the flip angle between the seat (1) and the backrest (2).

2. The portable folding chair according to claim 1, characterized in that: The seat (1) is provided with a first sleeve (12), the first sleeve (12) has a first through hole (121) through which the plug rod (11) can pass, the first through hole (121) is provided with a first limiting step (122), the plug rod (11) is provided with a first limiting baffle (111), and a first spring (13) is provided between the first limiting step (122) and the first limiting baffle (111). The first spring (13) is used to drive the plug rod (11) to be inserted into the plug hole (21).

3. The portable folding chair according to claim 2, characterized in that: The first sleeve (12) has a first notch (123), and the plug rod (11) has a handle (124) extending radially. The extension length of the handle (124) is greater than the diameter of the first sleeve (12). The first notch (123) is used to allow the handle (124) to be inserted when the plug rod (11) is inserted into the plug hole (21).

4. The portable folding chair according to claim 3, characterized in that: A limiting groove (125) is provided on the end face of the first sleeve (12), and the limiting groove (125) is used to accommodate the handle (124) to restrict the rotation of the handle (124).

5. The portable folding chair according to claim 2, characterized in that: The first sleeve (12) is threadedly connected to the seat (1).

6. The portable folding chair according to claim 1, characterized in that: The seat (1) is rotatably connected to both sides of the armrests (14), which can be rotated to adjust their position on the seat (1).

7. The portable folding chair according to claim 6, characterized in that: The seat (1) is provided with a second sleeve (15), the second sleeve (15) has a second through hole (151) through which the insertion rod (11) can pass, the second through hole (151) has a second limiting step (152) inside, the armrest (14) is provided with a horizontal bar (141) and a vertical bar (142), the horizontal bar (141) and the vertical bar (142) are vertically connected, the horizontal bar (141) is provided with a second limiting baffle (143), the second limiting step (152) and the second limiting baffle (143) are provided with a second spring (16), the second sleeve (15) has a second notch (153), the second spring (16) is used to drive the vertical bar (142) to insert into the second notch (153).

8. The portable folding chair according to claim 7, characterized in that: There are two second gaps (153), which are symmetrically arranged and located on the same vertical plane.

9. The portable folding chair according to claim 1, characterized in that: The first support structure (4) includes a first support frame (41) and a first fastener (42). One side of the first support frame (41) is hinged to the seat (1), and the other side is detachably connected to the leg pad (3) through the first fastener (42).

10. The portable folding chair according to claim 1, characterized in that: The second support structure (5) includes a base (51), a second support frame (52), and a second fastener (53). One side of the second support frame (52) is hinged to the base (51), and the other side is detachably connected to the seat (1) through the second fastener (53).

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