Backrest frame with high supporting performance

Abstract

The utility model discloses a high-supporting-performance backrest frame which comprises an annular bottom frame, two supporting rods which are arranged in a bilateral symmetry mode are arranged on the front side of the annular bottom frame, a sliding seat capable of sliding up and down is arranged on the supporting rods, a back cushion is arranged on the front side of the sliding seat, an adjusting screw rod is arranged on the rear side of the sliding seat, and the adjusting screw rod is arranged on the back side of the annular bottom frame. The backrest frame can be fixed on a rear support of an electric wheelchair, a take-out box can be placed on the annular bottom frame, the peripheral side of the take-out box can be limited and fixed, and the take-out box can be placed on the annular bottom frame, so that the take-out box can be placed on the annular bottom frame and can be fixed on the rear support of the electric wheelchair, and the service life of the take-out box is prolonged. Meanwhile, the back cushion capable of being adjusted up and down is arranged on the front side of the frame structure, so that a rider can abut against the back cushion when tired, and the comfort degree is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of frames, in particular to a high-support backrest frame. Background Art

[0002] With the improvement of living standards, the food delivery industry is developing more and more rapidly, which requires a lot of labor to deliver food. At present, the food delivery industry usually uses electric vehicles for delivery, and food deliverymen usually use larger food delivery boxes to place a certain number of food. In the prior art, the food delivery boxes are either placed on the pedals of the electric vehicles or directly modified and fixed behind the seats. The former makes it difficult for people to put their feet, and the latter makes it difficult to conveniently disassemble and put the boxes. In addition, there is no backrest to support the rear side when people are driving, and they feel very tired after riding for a long time. Therefore, it is necessary to design a high-support backrest frame to solve the above technical problems. Utility Model Content

[0003] In order to solve the above technical problems, the utility model relates to a high-support backrest frame, which has a simple and reliable structure, effectively solves the above technical problems, and is suitable for popularization and use. In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0004] A high-support backrest frame comprises an annular base frame, two support rods symmetrically arranged on the front side of the annular base frame, a sliding seat that can slide up and down is arranged on the support rods, a cushion is arranged on the front side of the sliding seat, an adjusting screw is arranged on the rear side of the sliding seat, and the adjusting screw is used to fix the sliding seat, side baffles are symmetrically arranged on the left and right sides of the annular base frame, and the front ends of the two side baffles are fixedly connected by a cross bar.

[0005] On the basis of the above scheme and as a preferred scheme of the above scheme: the sliding seat is provided with a through hole that slides with the support rod, the support rod is provided with a plurality of positioning holes evenly spaced in the vertical direction, the positioning holes penetrate the support rod radially, a threaded hole is provided on one side of the sliding seat, the adjusting screw is threadedly connected to the threaded hole and passes through one of the positioning holes to fix the position of the sliding seat, and the outer peripheral surface of the head of the adjusting screw is provided with a plurality of anti-slip grooves spaced circumferentially.

[0006] On the basis of the above solution and as a preferred solution of the above solution: a limit baffle is provided at the rear of the annular bottom frame.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: a reinforcement rod is provided on the inner side of the annular bottom frame, and a plurality of reinforcement rods are evenly arranged at intervals along the lateral direction. Two fixing plates are provided at the bottom of the annular bottom frame, and the fixing plates are fixedly connected to the reinforcement rods. Each of the fixing plates is provided with two left-right symmetrical waist-shaped connecting holes.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes a pull rope, a hook, and a snap ring, wherein the snap ring is fixed to the rear end of one of the side baffles, one end of the pull rope is fixedly connected to the other side baffle, and the other end of the pull rope is fixedly connected to the hook.

[0009] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects: the backrest frame designed by the present invention can be fixed on the rear bracket of the electric wheelchair, the takeaway box can be placed on the annular bottom frame and its surrounding sides are limited and fixed, so it is not easy to fall, and the box can be freely taken and placed. At the same time, a cushion that can be adjusted up and down is provided on the front side of the frame structure for the rider to lean on when tired, thereby improving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a first-person perspective diagram of the overall structure;

[0011] Figure 2 It is a second-view schematic diagram of the overall structure;

[0012] Figure 3 is a schematic cross-sectional view of a slide;

[0013] Figure 4 It is a schematic diagram of the coordination between the hook and the snap ring. DETAILED DESCRIPTION

[0014] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0015] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate directions or positional relationships based on the attached Figure 1 The directions or positional relationships shown are only for the convenience of describing the present invention, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0016] In the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0017] In order to solve the above technical problems, Figure 1-3As shown, this embodiment designs a high-support backrest frame, including an annular bottom frame 1, the front side of the annular bottom frame 1 is provided with two left-right symmetrical support rods 2, the support rod 2 includes a lower curved rod body and an upper vertical rod body, a slide seat 3 that can slide up and down is provided on the support rod 2, a cushion 4 is provided on the front side of the slide seat 3, an adjusting screw 5 is provided on the rear side of the slide seat 3, and the adjusting screw 5 is used to fix the slide seat 3. Preferably, the slide seat 3 is provided with a through hole that slides with the support rod 2, and the support rod 2 is provided with a plurality of vertically extending screws. There are evenly spaced positioning holes 6, which radially penetrate the support rod 2. A threaded hole is provided on one side of the slide seat 3. The adjusting screw 5 is threadedly connected to the threaded hole and passes through one of the positioning holes 6 to fix the position of the slide seat 3. If the adjusting screw 5 is unscrewed outward, the position of the slide seat 3 can be freely adjusted up and down, so that the position of the cushion 4 can be adapted to the body shape of the rider, the adjustment is convenient, and the comfort is improved. The outer peripheral surface of the head of the adjusting screw 5 is provided with a plurality of anti-slip grooves arranged at intervals along the circumferential direction, so that it is easier to apply force to rotate when holding the adjusting screw 5.

[0018] Side baffles 7 are symmetrically arranged on the left and right sides of the annular bottom frame 1, which can be fixedly connected by welding. The front ends of the two side baffles 7 are fixedly connected by a cross bar 8. The side baffles 7 cooperate with the cross bar 8 to limit the takeaway box placed on the annular bottom frame 1 from the left and right sides and the front side. Furthermore, a limiting baffle 9 is arranged at the rear part of the annular bottom frame 1. The height of the limiting baffle 9 is lower than that of the side baffle 7, so it will not obviously affect the taking and placing of the takeaway box. At the same time, the takeaway box can also be limited from the rear side to prevent it from falling during driving.

[0019] Furthermore, a reinforcement rod 10 is provided on the inner side of the annular bottom frame 1, and a plurality of reinforcement rods 10 are evenly arranged at intervals along the lateral direction. Two fixing plates 11 are provided at the bottom of the annular bottom frame 1, and the fixing plates 11 are fixedly connected to the reinforcement rods 10. Each of the fixing plates 11 is provided with two left-right symmetrical waist-shaped connecting holes. The fixing plates 11 can be fixedly connected to the rear bracket of the electric vehicle by a bolt and nut assembly. The arrangement of the reinforcement rods 10 can enhance the structural strength of the annular bottom frame 1.

[0020] Different from the above embodiment, Figure 4 As shown, the present embodiment also designs a preferred solution, specifically, it also includes a pull rope 12, a hook 13, and a snap ring 14, the snap ring 14 is fixed to the rear end of one of the side baffles 7, one end of the pull rope 12 is fixedly connected to the other side baffle 7, and the other end of the pull rope 12 is fixedly connected to the hook 13. When the hook 13 and the snap ring 14 cooperate, the box body can be limited from the rear side. If you want to take or put the takeaway box, you only need to separate the two.

[0021] The backrest frame designed in the utility model can be fixed on the rear bracket of the electric wheelchair, and the takeaway box can be placed on the annular bottom frame 1, and its surrounding sides are limited and fixed, so it is not easy to fall, and the box can be freely taken and placed. At the same time, a cushion 4 that can be adjusted up and down is provided on the front side of the frame structure for the rider to lean on when tired, thereby improving comfort.

[0022] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made by technicians in the relevant technical field based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-support backrest frame, characterized in that: It includes an annular bottom frame, two support rods symmetrically arranged on the front side of the annular bottom frame, a sliding seat that can slide up and down is arranged on the support rod, a cushion is arranged on the front side of the sliding seat, an adjusting screw is arranged on the rear side of the sliding seat, and the adjusting screw is used to fix the sliding seat, side baffles are symmetrically arranged on the left and right sides of the annular bottom frame, and the front ends of the two side baffles are fixedly connected by a cross bar.

2. A high support backrest frame according to claim 1, characterized in that: The sliding seat is provided with a through hole that slides with the support rod, and the support rod is provided with a plurality of positioning holes that are evenly spaced in the vertical direction. The positioning holes penetrate the support rod radially, and a threaded hole is provided on one side of the sliding seat. The position of the sliding seat is fixed when the adjusting screw is threadedly connected to the threaded hole and passes through one of the positioning holes. The outer peripheral surface of the head of the adjusting screw is provided with a plurality of anti-slip grooves that are spaced circumferentially.

3. A high support backrest frame according to claim 1, characterized in that: A limit baffle is arranged at the rear of the annular bottom frame.

4. A high support backrest frame according to claim 1, characterized in that: A reinforcement rod is provided on the inner side of the annular bottom frame, and a plurality of reinforcement rods are evenly arranged at intervals in the lateral direction. Two fixing plates are provided at the bottom of the annular bottom frame, and the fixing plates are fixedly connected to the reinforcement rods. Each of the fixing plates is provided with two left-right symmetrical waist-shaped connecting holes.

5. The high support backrest frame according to claim 1, characterized in that: It also includes a drawstring, a hook, and a snap ring, wherein the snap ring is fixed to the rear end of one of the side baffles, one end of the drawstring is fixedly connected to the other side baffle, and the other end of the drawstring is fixedly connected to the hook.

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