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CN-224220387-U - Adjustable backrest belt of four-wheel cart

CN224220387UCN 224220387 UCN224220387 UCN 224220387UCN-224220387-U

Abstract

The utility model discloses an adjustable backrest belt of a four-wheel cart, wherein connecting seats are arranged at two ends of a belt-shaped main body, the inner ends of the connecting seats are connected with the outer ends of the belt-shaped main body, the outer ends of the connecting seats are connected with the sides of a four-wheel cart bracket, the connecting seats comprise inner connectors, extension bodies, outer connectors and positioning components, the outer connectors are internally provided with jacks from the inner ends, the outer ends of the extension bodies extend into the jacks, at least two positioning holes are formed in the extension bodies in the length direction, the positioning components penetrate through one positioning hole in the outer connectors and the extension bodies for positioning, the inner ends of the extension bodies are fixed with the outer ends of the inner connectors, and the inner ends of the inner connectors are connected with the outer ends of the belt-shaped main body. The position of the depth of the seat cushion is changed by the extension body of the adjustable backrest belt, the upper body is more in back depending space during sitting, the sitting is comfortable, the safety is good, the occupied space is small during pushing and storage, the operation of the adjustable structure is convenient, the whole length of the extension body can be designed by combining the outer connector, and the whole backrest belt has a larger adjustable length range.

Inventors

  • XIE FUWEI

Assignees

  • 镇江艾康医疗器械有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (7)

  1. 1. The four-wheel cart adjustable backrest belt is characterized by comprising a belt-shaped main body (1), wherein connecting seats (2) are arranged at two ends of the belt-shaped main body (1), the inner ends of the connecting seats (2) are connected with the outer ends of the belt-shaped main body (1), the outer ends of the connecting seats (2) are connected with the sides of a four-wheel cart support, the connecting seats (2) comprise an inner connecting head (21), an extension body (22), an outer connecting head (23) and a positioning assembly (24), insertion holes (231) are formed in the outer connecting head (23) from the inner end to the inner side, the outer end of the extension body (22) extends into the insertion holes (231), at least two positioning holes (221) are formed in the extension body (22) in the length direction, the positioning assembly (24) is used for positioning one of the outer connecting head (23) and the outer end of the extension body (22) in a penetrating mode, the inner end of the extension body (22) is fixed with the outer end of the inner connecting head (21), and the inner connecting head (21) is connected with the outer end of the main body (1).
  2. 2. The adjustable backrest belt of a four-wheeled vehicle according to claim 1, wherein a communication groove (222) is formed on the surface of the extension body (22), and the communication groove (222) connects the positioning holes (221) in sequence.
  3. 3. The four-wheeled cart adjustable back strap of claim 2, wherein the communicating groove (222) has a groove depth smaller than the hole depth of said positioning hole (221).
  4. 4. The four-wheeled cart adjustable backrest belt of claim 1, wherein the positioning assembly (24) comprises a pressing plate (241), a spring (242), a shaft pin (243) and a positioning column (244), the pressing plate (241) and the outer connector (23) are in the same direction in the length direction, the middle part of the pressing plate (241) is connected with the inner end of the outer connector (23) in a penetrating way, which is not the jack (231), of the region by the shaft pin (243), the pressing plate (241) can swing by the shaft pin (243), the spring (242) is connected between the outer end of the pressing plate (241) and the surface of the outer connector (23), and the positioning column (244) is arranged at the inner end of the pressing plate (241) and faces the positioning hole (221).
  5. 5. The adjustable backrest belt of a four-wheeled cart according to claim 4, wherein the outer connector (23) has an outer accommodating chamber (232) extending from an inner end surface thereof, the accommodating chamber (232) has an opening (233), the pressing plate (241) is disposed in the accommodating chamber (232) from the opening (233), the middle part of the pressing plate (241) is connected with a wall surface of the accommodating chamber (232) by penetrating through the shaft pin (243), a through hole is formed in a bottom surface of the accommodating chamber (232), and the positioning column (244) faces the positioning hole (221) from the through hole.
  6. 6. The four-wheeled cart adjustable back strap according to claim 1, wherein said extension body (22) is plate-shaped, and said extension body (22) is arranged and connected in the same width direction as said belt-shaped main body (1).
  7. 7. The adjustable backrest belt of a four-wheeled vehicle according to claim 1, wherein the outer end of the outer connector (23) is a U-shaped bayonet (234).

Description

Adjustable backrest belt of four-wheel cart Technical Field The utility model relates to a four-wheel cart for assisting walking, in particular to a back rest strap of the four-wheel cart. Background The four-wheel walking-aid cart is mainly used for users with inconvenient legs and feet to push and move so as to support and assist the users to walk, and compared with wheelchairs and crutches, the four-wheel walking-aid cart can be pushed by the users to walk, is convenient for exercise and exercise, has good stability and high safety, and also has a seat cushion for sitting and resting. In order to facilitate the characteristic of smaller whole volume of the four-wheel cart and facilitate pushing, the depth of the seat cushion is almost half that of the seat cushion of the wheelchair, and the leaning back strap above the seat cushion is matched with the depth of the seat cushion, but the sitting posture space is limited, the depth space capable of containing the body is smaller, and the sitting posture is uncomfortable. Disclosure of utility model The utility model aims to provide a backrest belt of a four-wheel cart, which can provide a larger sitting posture space above a seat cushion by adjusting the length of the backrest belt under the condition of smaller seat cushion depth. The technical scheme is that the four-wheel cart adjustable backrest belt comprises a belt-shaped main body, connecting seats are arranged at two ends of the belt-shaped main body, the inner ends of the connecting seats are connected with the outer ends of the belt-shaped main body, the outer ends of the connecting seats are connected with the sides of a four-wheel cart support, the connecting seats comprise inner connectors, extension bodies, outer connectors and positioning components, insertion holes are formed in the outer connectors from the inner ends to the inner sides, the outer ends of the extension bodies extend into the insertion holes, at least two positioning holes are formed in the extension bodies in the length direction, the positioning components are used for positioning the outer connectors and one positioning hole in the extension bodies in a penetrating mode, the inner ends of the extension bodies are fixed with the outer ends of the inner connectors, and the inner ends of the inner connectors are connected with the outer ends of the belt-shaped main body. Further, a communication groove is formed in the surface of the extension body, and the communication groove sequentially connects the positioning holes. When switching the locating hole, the communicating groove plays a role in guiding the movement of the locating column and the entering of a new locating hole, so that the operation is convenient during adjustment, and inconvenience in locating and difficulty in entering the hole are avoided. Optimally, the depth of the communicating groove is smaller than the depth of the positioning hole, and the communicating groove can feel whether the hole position is reached or is moved to be adjusted through depth during adjusting operation. Further, the positioning assembly comprises a pressing plate, a spring, a shaft pin and a positioning column, the pressing plate and the outer connector are in the same direction in the length direction, the middle part of the pressing plate and the inner end of the outer connector are not in the jack area, the shaft pin is penetrated and connected, the pressing plate is capable of swinging through the shaft pin, the outer end of the pressing plate is connected with the surface of the outer connector through the spring, and the positioning column is arranged at the inner end of the pressing plate and faces the positioning hole. Optimally, the inner end surface of the outer connector extends out of the accommodating cavity, the accommodating cavity is provided with an opening, the pressing plate is arranged in the accommodating cavity from the opening, the middle part of the pressing plate is connected with the wall surface of the accommodating cavity in a penetrating way through the shaft pin, the bottom surface of the accommodating cavity is provided with a through hole, and the positioning column faces to the positioning hole from the through hole. The positioning assembly is arranged outside the external connector through the accommodating cavity, the positioning assembly can be conveniently operated, the pressing plate is connected with the wall surface of the accommodating cavity in a penetrating way through the shaft pin, the connecting position of the shaft pin is an area on the external connector, which is not provided with a jack, and the positioning assembly and the extension body do not interfere in the jack. Further, the extension body is plate-shaped, and the extension body and the band-shaped body are arranged and connected in the same width direction. The whole backrest belt is flattened in the thickness direction. Furthermore, the outer end of the outer connector