CN2857918Y - Combined structure of wheelchair back frame - Google Patents

Abstract

The utility model discloses a wheelchair back frame combination structure, which mainly comprises a wheelchair main frame body, a telescopic rod body and a wheelchair back frame combination, wherein the upper part and the lower part of the rear side of the wheelchair main frame body are respectively provided with a pin joint part; the telescopic rod body is provided with an outer pipe and an inner pipe, the outer pipe is pivoted with a pivoting part above the binding body and is provided with a plurality of positioning holes, the inner pipe penetrates through the outer pipe and is provided with an elastic convex button, and the outer pipe and the inner pipe are respectively provided with a condensation part and an expansion part; the back frame has an upper rod and a lower rod, and the height of the assembly can be adjusted, so that the angle of the back frame can be adjusted and the back frame has better applicability and safety.

Description

Combined structure of wheelchair back frame

technical field

The utility model relates to a combined structure of a wheelchair back frame.

Background technique

Conventional wheelchairs are mainly one of the means of transportation for people with reduced mobility. As shown in Figure 6, it is one of the structures of conventional wheelchairs. It mainly has a back frame 1', a seat frame 2', an armrest frame 3', and a foot frame 4 ', connecting frame 5', wheel body 6', cushion body 7', and the back frame 1' is vertically fixed on both sides of the seat frame 2'; and one end of the armrest frame 3' is vertically fixed to the back frame 1' , and the other side is joined with the seat frame 2' and the tripod 4'; the tripod 4' is joined with the connecting frame 5' and the back frame 1', and the wheel body 6' is set on the tripod 4'; and the pad body It is arranged on the back frame 1' and the seat frame 2', so that the user can sit on the cushion body 7 and travel by the wheel body 6'.

However, although the above-mentioned structure has low component cost and can meet the economic benefits of general consumer needs, but because the back frame 1' is fixedly connected to the seat frame 2' and the armrest frame 3', the angle and height of the back frame 1' cannot be adjusted. As a result, the elevation angle and height of the back frame 1' are fixed after combination, resulting in poor ride comfort and applicability.

It is also known that wheelchairs are equipped with air pressure rods or other structures that can adjust the angle of the back frame by means of the back frame, but the overall cost of the aforementioned structure is still higher than the above-mentioned conventional products, and the price of the wheelchair is too high to meet the burden of most consumers. , has economic benefits and poor popularity.

Utility model content

The purpose of the utility model is to provide a combination structure of the back frame of a wheelchair which can adjust the combination angle and height of the back frame according to the requirement and has better economic benefits.

In order to achieve the above object, the solution of the utility model is: a combination structure of a wheelchair back frame, which is mainly composed of a wheelchair main frame body, a telescopic rod body, and a wheelchair back frame. Connecting part; the telescopic rod body has an outer tube and an inner tube, and a pivoting part is set on the outer tube, and the pivoting part is connected to the pivoting part above the main frame body by means of a pivoting element, and the inner tube penetrates and extends in the outer tube. A pivot joint for pivotal connection with the back frame, and the combined length of the telescopic rod body can be adjusted; the back frame is provided with a pivot joint at the position corresponding to the pivot joint below the aforementioned telescopic rod body and the main frame body, and the pivot joint element is respectively connected with the telescopic rod body and the main frame body hinge.

The outer tube is provided with elastic convex buttons, and the inner tube is provided with several positioning holes.

One end of the outer tube of the telescopic rod body is provided with a constriction part with a smaller diameter, and one end of the inner tube is provided with an expansion part with a larger diameter, and the diameter of the expansion part is larger than that of the contraction part.

The back frame is interspersed and combined by the lower and upper rods, the lower rod is provided with a pivoting part and the main frame is pivotally connected, and the above-mentioned telescopic rod is assembled by a pivotal element, and an elastic convex button is set; the upper rod is connected to the back cushion, and Slotted holes are provided corresponding to the positions of the aforementioned pivotal components, and a plurality of positioning holes are provided corresponding to the positions of the aforementioned elastic knobs.

After adopting the above-mentioned solution, the utility model can make the inner tube of the telescopic rod displace during operation through the above-mentioned combination, so that the elastic convex button can be engaged with the appropriate positioning hole of the outer tube to adjust the angle of the back frame, and the outer tube can correspond to the main frame when the back frame is adjusted. The upper frame is offset to improve the smoothness of adjustment; the diameter of the inner tube is larger than the diameter of the constricted part, so that when the back frame is tilted back at the maximum angle, the constricted part of the inner tube and the expanded part of the outer tube can be used to abut against the stop; and then the back The height of the shelf can be adjusted by engaging the proper positioning hole with the elastic knob, and can be folded to reduce the storage volume.

Description of drawings

Fig. 1 is an exploded view of the utility model;

Fig. 2 is a combination diagram of the utility model;

Fig. 3 is a schematic diagram of adjusting the back of the chair to the maximum angle according to the utility model;

Fig. 4 is a combined sectional schematic view of the utility model;

Fig. 5 is a schematic diagram of the folding of the back frame of the present invention;

Fig. 6 is a structural schematic diagram of a conventional product.

Description of main component symbols

1 Main frame body 11 Pivot joint 12 Pivot joint

2 Telescopic rod body 21 Outer tube 211 Pivot joint 212 Positioning hole

213 Condensation part 22 Inner tube 221 Elastic convex button 222 Pivot joint

223 Expansion Department

3 Back frame 31 Lower rod body 311 Pivot joint 312 Elastic convex button

32 upper rod frame 321 slotted hole 322 positioning hole 4 cushion

1’back frame 2’seat frame 3’armrest frame 4’tripod

5'connecting frame 6'wheel body 7'cushion body

Detailed ways

Please refer to Figures 1 and 2, the embodiment of the utility model is mainly composed of a wheelchair main frame body 1, a telescopic rod body 2, and a wheelchair back frame 3, and pivot joints 11 and 12 are respectively arranged above and below the rear side of the main frame body 1. .

The telescoping rod body 2 has an outer tube 21 and an inner tube 22, and a pivot joint 211 is provided on the outer tube 21 to pivotally connect with the pivot joint 11 above the main frame body 1 through a pivot joint element, and several positioning holes 212 are provided, and at one end A condensation part 213 with a smaller diameter is provided; the inner tube 22 is inserted into the outer tube 21, and an elastic knob 221 is provided for embedding the aforementioned positioning hole 212; part 222; an expansion part 223 larger in diameter than the contraction part 213 is provided at one end.

The back frame 3 is interspersed and combined by the lower and upper rod bodies 31, 32, and the pivotal joint 311 is arranged below the lower rod body 31 to pivotally connect with the frame body 1, and the aforementioned telescopic rod body 2 is assembled by the pivotal joint element above, and an elastic convex button is arranged 312 ; the upper rod body 32 is connected to the back cushion 4 , and the elongated slot 321 is provided corresponding to the position of the above-mentioned pivoting element, and a plurality of positioning holes 322 are provided corresponding to the position of the above-mentioned elastic knob 312 .

After the utility model is combined, the angle of the back frame 3 can be adjusted by engaging the appropriate positioning hole 212 of the telescopic rod body 2 with the elastic convex button 221, and as shown in Figure 3, when the back frame 3 reclines to the maximum angle, the expansion part 223 and the condensing portion 213 are against the stop for safety in use.

Also as shown in Figure 4, the utility model can adjust the height of the back frame 3 by engaging the appropriate positioning hole 322 with the elastic knob 312, and as shown in Figure 5, the utility model can make the back frame 3 realize the folded state, It reduces the folded volume and can be easily carried in the car.

From the above, the structure of the utility model can have the effects of conventional applicability, comfort, safety, and convenient transportation compared with conventional products.

Claims (4)

1, a kind of chair back rack combinative structure of taking turns, main tool wheelchair body frame body, the flexible body of rod, the combination of wheel chair back rack, it is characterized in that: this body frame body back side top, below are provided with the articulated section respectively; Flexible body of rod tool outer tube, interior pipe, and the articulated section is set in outer tube articulate by pivot connecting element and articulated section, body frame body top, and interior pipe is extended through in the outer tube, be provided with in the rear end can for and the articulated section of back of the body frame pivot joint, and can adjust expansion link body pattern length; Back of the body frame is provided with the articulated section in the aforementioned flexible body of rod of correspondence, position, articulated section, body frame body below, is articulated with the flexible body of rod, body frame body respectively by pivot connecting element.

2, the chair back rack combinative structure of taking turns as claimed in claim 1, it is characterized in that: outer tube is provided with the protruding button of elasticity, and interior pipe is provided with some locating holes.

3, the chair back rack combinative structure of taking turns as claimed in claim 1 is characterized in that: outer tube one end of the flexible body of rod is provided with the less condensation portion of diameter, and interior Guan Yiduan is provided with the bigger enlarged portion of diameter, and this enlarged portion diameter is greater than condensation portion diameter.

4, the chair back rack combinative structure of taking turns as claimed in claim 1 is characterized in that: back of the body frame is by the interspersed combination of the upper and lower body of rod, and the articulated section is set in this time body of rod below and the body frame body articulates, and the aforementioned flexible body of rod is established by the pivot connecting element group in the top, and the protruding button of elasticity is set; The last body of rod engages back cushion, and corresponding aforementioned pivot connecting element position is provided with rectangular slotted eye, and the protruding button of corresponding aforementioned elasticity position is provided with some locating holes.

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