Angle-adjustable backrest device

Abstract

The angle-adjustable backrest device comprises a supporting outer frame and a supporting inner frame, the front portion of the supporting outer frame is connected with the front portion of the supporting inner frame in a hinged mode, the rear portion of the supporting inner frame extends horizontally to form a base, the rear portion of the supporting outer frame extends upwards in an inclined mode to form a backrest portion, and a U-shaped supporting rod is hinged to the backrest portion. The lower end of the U-shaped supporting rod comprises a first transverse rod, a plurality of positioning groove pieces are arranged above the base, each positioning groove piece comprises a fastening seat piece and a guide piece, a clamping groove is formed between the adjacent guide piece and fastening seat piece, the guide piece is a slope extending downwards, the fastening seat piece is an upward hook face, the first transverse rod is connected with one clamping groove in a clamped mode, and the second transverse rod is connected with the other clamping groove in a clamped mode. The first transverse rod accurately slides into the clamping groove through the guiding piece, the contact area of the hook face of the fastening base piece and the first transverse rod is larger than or equal to one third of the circle of the cross section of the first transverse rod, the first transverse rod is not prone to sliding out of the positioning groove, and the safety performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of backrests, and more specifically, particularly relates to a backrest with adjustable angle. Background Art

[0002] With the rapid development of social economy and the continuous improvement of people's living standards, the nursing mattresses currently on the market are complicated to operate and simple in function, which is very unfavorable for the patient's rehabilitation. Due to the different needs of patients, the mattresses are required to have different effects on different parts of the body. The existing mattresses are difficult to meet the needs of caregivers, have a narrow application range, and slow function startup. Less consideration is given to the patient's rehabilitation, and the patient suffers from skin diseases such as bedsores. In addition, the structural adjustment and detachability are very poor, and transportation is inconvenient. In addition, the existing nursing mattresses are electrically controlled. After a long time, the circuit is prone to aging and cannot work, so the angle position of the nursing bed cannot be changed, and it is not conducive to the health and safety of the patient.

[0003] The original patent publication number CN103653906 A discloses a folding recliner, the recliner includes a supporting fabric, an outer supporting frame and an inner supporting frame, the outer supporting frame and the middle part of the inner supporting frame are rotatably connected to each other, and the two ends of the supporting fabric are respectively connected to the upper end of the outer supporting frame and the upper end of the inner supporting frame. The advantages of the folding recliner disclosed by the present invention are that the backrest angle adjustment range is large, it can be folded, the weight is light, the cost is low, and it is easy to carry.

[0004] However, in the prior art, some slots or positioning slots are U-shaped structures. After being used for a period of time, the cross bar cannot be accurately introduced into the positioning slot and the cross bar is easy to slide out of the positioning slot, which is dangerous.

[0005] Therefore, the existing patent publication number CN219835387U discloses a folding recliner with an adjustable backrest angle, which fixes the cross bar by a positioning groove member so that the cross bar is not easy to slide out of the positioning groove. However, such operation makes it inconvenient to adjust the angle of the cross bar. Therefore, how to find a method that is easy to operate and does not make the cross bar easily slide out of the positioning groove has become a problem that needs to be solved at present. Utility Model Content

[0006] In order to solve the above problems, the utility model proposes an angle-adjustable backrest device, including a support outer frame 10 and a support inner frame 20, the front part of the support outer frame 10 is hingedly connected to the front part of the support inner frame 20, the rear part of the support inner frame 20 extends horizontally to form a base 201, and the rear part of the support outer frame 10 extends obliquely upward to form a backrest portion 101, a U-shaped support rod 30 is hinged on the backrest portion 101, and the lower end of the U-shaped support rod 30 includes a first cross bar 40, and a plurality of positioning grooves 50 are provided above the base 201, and the positioning grooves 50 include a fastening seat The plate 501 and the guide member 502, a slot is formed between the adjacent guide members 502 and the fastening seat plate 501, the guide member 502 is a downward extending inclined surface, the fastening seat plate 501 is an upward hook surface, the first cross bar 40 is engaged with one of the slots, so that the first cross bar 40 can accurately slide into the slot through the guide member 502, and the contact area between the hook surface of the fastening seat plate 501 and the first cross bar 40 is greater than or equal to one third of the circle of the cross section of the first cross bar 40, the first cross bar 40 is not easy to slide out of the positioning groove, thereby improving the safety performance.

[0007] A backrest with adjustable angle comprises an outer support frame 10 and an inner support frame 20, wherein the front portion of the outer support frame 10 is hingedly connected to the front portion of the inner support frame 20, the rear portion of the inner support frame 20 extends horizontally to form a base 201, and the rear portion of the outer support frame 10 extends obliquely upward to form a backrest portion 101, a U-shaped support rod 30 is hingedly connected to the backrest portion 101, and the lower end of the U-shaped support rod 30 comprises a first cross bar 40, characterized in that: a plurality of positioning groove members 50 are arranged above the base 201, the positioning groove member 50 comprises a fastening seat plate 501 and a guide member 502, a card slot is formed between adjacent guide members 502 and the fastening seat plate 501, the guide member 502 is an inclined surface extending downward, the fastening seat plate 501 is an upward hook surface, and the first cross bar 40 is card-engaged with one of the card slots.

[0008] Furthermore, the fastening seat plate 501 and the guide member 502 are integrally formed plastic parts.

[0009] Furthermore, positioning grooves 50 are horizontally symmetrically provided on the left and right sides of the base 201 , and a plurality of positioning grooves 50 on the same side of the base 201 are integrally formed to form a positioning groove assembly 90 , and the positioning grooves 50 are detachably connected to the base 201 .

[0010] Furthermore, the main body of the positioning groove member 50 is hollow.

[0011] Furthermore, a protruding blocking platform 70 is provided at the front end of the positioning groove which is closest to the front of the supporting outer frame 10 and is hinged to the front of the supporting inner frame 20 , so as to prevent the backrest portion 101 from sliding backward.

[0012] Furthermore, a supporting mesh 80 is sleeved on the supporting outer frame 10 , and the supporting mesh 80 is detachably connected to the supporting outer frame 10 .

[0013] Furthermore, the contact area between the hook surface of the fastening seat plate 501 and the first cross bar 40 at the lower end of the U-shaped support rod 30 is greater than or equal to one third of the circle of the cross section of the first cross bar 40 .

[0014] Furthermore, a reinforcing rod 60 is provided in the middle of the base 201 , and the reinforcing rod 60 is fixedly connected to the base 201 .

[0015] Furthermore, a second cross bar 102 is disposed on the upper portion of the backrest portion 101 , and the second cross bar 102 is in the shape of a circular arc that bends downward.

[0016] Furthermore, the front portion of the supporting outer frame 10 is a downwardly bent arc structure, and the front portion of the supporting inner frame 20 is an upwardly bent arc structure. The front portion of the supporting outer frame 10 is hingedly connected to the front portion of the supporting inner frame 20, so that the front portion of the supporting outer frame 10 and the front portion of the supporting inner frame 20 form an angle, and the upwardly bent arc structure of the front portion of the supporting inner frame 20 gives way to the downwardly bent arc structure of the front portion of the supporting outer frame 10.

[0017] Beneficial effects of the utility model: The utility model proposes an angle-adjustable backrest device, including a support outer frame 10 and a support inner frame 20, the front portion of the support outer frame 10 is hingedly connected to the front portion of the support inner frame 20, the rear portion of the support inner frame 20 extends horizontally to form a base 201, the rear portion of the support outer frame 10 extends obliquely upward to form a backrest portion 101, a U-shaped support rod 30 is hinged on the backrest portion 101, the lower end of the U-shaped support rod 30 includes a first cross bar 40, a plurality of positioning grooves 50 are provided above the base 201, and the positioning grooves 50 include a fastening The seat plate 501 and the guide member 502, a slot is formed between the adjacent guide members 502 and the fastening seat plate 501, the guide member 502 is a downward extending inclined surface, the fastening seat plate 501 is an upward hook surface, the first cross bar 40 is engaged with one of the slots, so that the first cross bar 40 can accurately slide into the slot through the guide member 502, and the contact area between the hook surface of the fastening seat plate 501 and the first cross bar 40 is greater than or equal to one third of the circle of the cross section of the first cross bar 40, the first cross bar 40 is not easy to slide out of the positioning groove, thereby improving the safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side view of the angle-adjustable backrest of the present application.

[0019] Figure 2 It is a partial side view of the angle-adjustable backrest of the present application.

[0020] Main component symbols

[0021] Support frame 10 Backrest 101 Second crossbar 102 Support inner frame 20 Base 201 U-Shaped Support Rod 30 First crossbar 40 Positioning slot 50 Fastening seat 501 Guide 502 Reinforcement rod 60 Blocking platform 70 Support mesh 80 Positioning slot assembly 90

[0022] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, it is a side view of the adjustable angle backrest of the present application; Figure 2 Shown is a partial side view of the angle-adjustable backrest of the present application.

[0024] A backrest device with adjustable angle comprises a support outer frame 10 and a support inner frame 20, wherein the front portion of the support outer frame 10 is hingedly connected to the front portion of the support inner frame 20, the rear portion of the support inner frame 20 extends horizontally to form a base 201, the rear portion of the support outer frame 10 extends obliquely upward to form a backrest portion 101, a U-shaped support rod 30 is hingedly connected to the backrest portion 101, the lower end of the U-shaped support rod 30 comprises a first cross bar 40, a plurality of positioning grooves 50 are horizontally symmetrically arranged on the left and right sides of the base 201, a plurality of positioning grooves 50 on the same side of the base 201 are integrally formed to form a positioning groove assembly 90, and the body of the positioning groove 50 is a hollow The positioning groove member 50 is detachably connected to the base 201. The positioning groove member 50 includes a fastening seat plate 501 and a guide member 502. The fastening seat plate 501 and the guide member 502 are integrally formed plastic parts. A slot is formed between the adjacent guide members 502 and the fastening seat plate 501. The guide member 502 is a downwardly extending inclined surface, and the fastening seat plate 501 is an upward hook surface. The first cross bar 40 is engaged with one of the slots, and the contact area between the hook surface of the fastening seat plate 501 and the first cross bar 40 at the lower end of the U-shaped support rod 30 is greater than or equal to one third of the circle of the cross section of the first cross bar 40.

[0025] A protruding stopper 70 is provided at the front end of the positioning groove which is closest to the front of the supporting outer frame 10 and is hinged to the front of the supporting inner frame 20 , so as to prevent the backrest portion 101 from sliding backward.

[0026] The supporting outer frame 10 is also sleeved with a supporting mesh 80 , and the supporting mesh 80 is detachably connected to the supporting outer frame 10 .

[0027] A reinforcing rod 60 is disposed in the middle of the base 201 , and the reinforcing rod 60 is fixedly connected to the base 201 .

[0028] A second cross bar 102 is disposed on the upper portion of the backrest portion 101 , and the second cross bar 102 is in an arc shape that bends downward.

[0029] The front portion of the support outer frame 10 is a downwardly bent arc structure, and the front portion of the support inner frame 20 is an upwardly bent arc structure. The front portion of the support outer frame 10 is hingedly connected to the front portion of the support inner frame 20, so that the front portion of the support outer frame 10 and the front portion of the support inner frame 20 form an angle, and the upwardly bent arc structure of the front portion of the support inner frame 20 gives way to the downwardly bent arc structure of the front portion of the support outer frame 10.

[0030] Beneficial effects of the utility model: The utility model proposes an angle-adjustable backrest device, including a support outer frame 10 and a support inner frame 20, the front portion of the support outer frame 10 is hingedly connected to the front portion of the support inner frame 20, the rear portion of the support inner frame 20 extends horizontally to form a base 201, the rear portion of the support outer frame 10 extends obliquely upward to form a backrest portion 101, a U-shaped support rod 30 is hinged on the backrest portion 101, the lower end of the U-shaped support rod 30 includes a first cross bar 40, a plurality of positioning grooves 50 are provided above the base 201, and the positioning grooves 50 include a fastening The seat plate 501 and the guide member 502, a slot is formed between the adjacent guide members 502 and the fastening seat plate 501, the guide member 502 is a downward extending inclined surface, the fastening seat plate 501 is an upward hook surface, the first cross bar 40 is engaged with one of the slots, so that the first cross bar 40 can accurately slide into the slot through the guide member 502, and the contact area between the hook surface of the fastening seat plate 501 and the first cross bar 40 is greater than or equal to one third of the circle of the cross section of the first cross bar 40, the first cross bar 40 is not easy to slide out of the positioning groove, thereby improving the safety performance.

[0031] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An angle-adjustable backrest, comprising a support outer frame (10) and a support inner frame (20), wherein the front portion of the support outer frame (10) is hingedly connected to the front portion of the support inner frame (20), the rear portion of the support inner frame (20) extends horizontally to form a base (201), the rear portion of the support outer frame (10) extends obliquely upward to form a backrest portion (101), a U-shaped support rod (30) is hingedly connected to the backrest portion (101), and the lower end of the U-shaped support rod (30) includes a first cross rod (40), characterized in that: A plurality of positioning grooves (50) are provided above the base (201), and the positioning grooves (50) include a fastening seat plate (501) and a guide member (502), and a clamping groove is formed between adjacent guide members (502) and the fastening seat plate (501), the guide member (502) is an inclined surface extending downward, and the fastening seat plate (501) is an upward hook surface, and the first cross bar (40) is clamped with one of the clamping grooves, and the front part closest to the supporting outer frame (10) is connected with the first cross bar (40). A raised blocking platform (70) is provided at the front end of the positioning groove hinged at the front of the supporting inner frame (20) for preventing the backrest portion (101) from sliding backwards, and a contact area between the hook surface of the fastening seat plate (501) and the first cross bar (40) at the lower end of the U-shaped support rod (30) is greater than or equal to one third of the circle of the cross section of the first cross bar (40), and a second cross bar (102) is provided at the upper part of the backrest portion (101), and the second cross bar (102) is in the shape of a downwardly curved arc.

2. The angle-adjustable backrest according to claim 1, characterized in that: The fastening seat plate (501) and the guide member (502) are integrally formed plastic parts.

3. The angle-adjustable backrest according to claim 2, characterized in that: Positioning grooves (50) are horizontally symmetrically provided on the left and right sides of the base (201); a plurality of positioning grooves (50) on the same side of the base (201) are integrally formed to form a positioning groove assembly (90); and the positioning grooves (50) are detachably connected to the base (201).

4. The angle-adjustable backrest according to claim 3, characterized in that: The main body of the positioning groove member (50) is in a hollow shape.

5. The angle-adjustable backrest according to claim 4, characterized in that: The supporting outer frame (10) is also sleeved with a supporting mesh cloth (80), and the supporting mesh cloth (80) is detachably connected to the supporting outer frame (10).

6. The angle-adjustable backrest according to claim 5, characterized in that: A reinforcing rod (60) is provided in the middle of the base (201), and the reinforcing rod (60) is fixedly connected to the base (201).

7. The angle-adjustable backrest according to claim 6, characterized in that: The front portion of the supporting outer frame (10) is a downwardly bent arc-shaped structure, and the front portion of the supporting inner frame (20) is an upwardly bent arc-shaped structure. The front portion of the supporting outer frame (10) is hingedly connected to the front portion of the supporting inner frame (20), so that the front portion of the supporting outer frame (10) and the front portion of the supporting inner frame (20) form an angle, and the upwardly bent arc-shaped structure of the front portion of the supporting inner frame (20) gives way to the downwardly bent arc-shaped structure of the front portion of the supporting outer frame (10).

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