Multifunctional folding goods shelf for wheelchair

Abstract

The multifunctional folding goods shelf mainly comprises a wheelchair backrest, a back plate, a right sliding block, a bottom plate and a rear plate, the two sliding blocks are installed on two guide rails on the left side and the right side of the wheelchair backrest, the back plate is rotationally connected with the rear side of the wheelchair backrest, and two elastic rings are installed between the lower end of the back plate and the lower end of the wheelchair backrest. The front end of the bottom plate is rotationally connected with the lower end of the back plate, the rear end of the bottom plate is connected with the upper end of the back plate through two sets of connecting rods, and the lower end of the rear plate is rotationally connected with the rear end of the bottom plate; the upper end of the rear plate is connected with the front end of the bottom plate through two connecting rods; when the goods shelf is in a folded state, only a small space is occupied; when the goods shelf is in the one-step unfolding state, an accompanying person can face the rear side and sit on the upper side of the rear plate; when the goods shelf is in the two-step unfolding state, the goods shelf has large loading capacity, and a user can conveniently carry goods to go out.

Description

Technical Field

[0001] The invention relates to the technical field of wheelchair manufacturing, and in particular to a multifunctional folding shelf for wheelchairs. Background Art

[0002] For the elderly and people with mobility difficulties such as leg disabilities, wheelchairs are an important tool for their daily travel; the above-mentioned people generally have sufficient free time, so most of them are keen to participate in interactive activities, such as playing chess, fishing, etc. Playing chess can well exercise the thinking activities of the elderly and disabled people. Fishing places generally have the characteristics of fresh air and abundant sunshine, which helps to increase the blood oxygen content of the elderly and disabled people. Fishing can also make the mentality of the above-mentioned people calm and eliminate negative emotions such as depression, frustration, anxiety, and irritability. In short, interactive activities in free time can effectively improve the quality of life of the elderly and disabled people; and most wheelchairs under current technical conditions only focus on the basic travel activities of users. From the beginning of design, the needs of users to carry fishing gear, chess gear or goods are not considered, or the storage space is designed in the space under the seat, which is prone to wear and tear of the bottom during travel. Therefore, when the elderly and disabled people travel in wheelchairs, they can only carry a small amount of daily necessities. If they need to carry chess gear, fishing gear and other equipment, it is very inconvenient. Therefore, it is very necessary to develop a multifunctional folding shelf for wheelchairs. Summary of the invention

[0003] In order to solve the shortcomings of the prior art, the purpose of the present invention is to provide a multifunctional folding shelf for wheelchairs. The folding shelf has a small volume in the folded state, can carry people in the one-step unfolded state, and can carry goods in the two-step unfolded state. It has the characteristics of simple principle and easy use.

[0004] The technical solution adopted by the present invention is: a multifunctional folding shelf for wheelchairs, mainly comprising a wheelchair backrest, a backboard, a right push rod, a right first connecting rod, a right sliding block, a right third connecting rod, a left push rod, a bottom plate, a left third connecting rod, a right second connecting rod, a left first connecting rod, a left second connecting rod, a right elastic ring, a right fifth connecting rod, a rear plate, a left fourth connecting rod, a left fifth connecting rod, and a right fourth connecting rod, characterized in that: a left handrail and a right handrail are fixedly arranged on the left and right sides of the wheelchair, respectively, a smooth guide circular hole is vertically arranged at the rear ends of the two handrails, and a left guide is respectively arranged at the lower ends of the left and right sides of the wheelchair backrest The left and right guide rails are connected to the left and right guide rails respectively, and the lower ends of the two guide rails are respectively provided with left and right limit blocks. The left and right elastic rings connected to the front column are respectively provided in the left and right semicircular grooves at the left and right ends of the lower side of the back of the wheelchair backrest. The left slider and the right slider are respectively installed on the left and right guide rails and can move up and down. The long round rod structure at the lower end of the left push rod passes through the guide round hole at the rear end of the left handrail and is connected to the left slider. The long round rod structure at the lower end of the right push rod passes through the guide round hole at the rear end of the right handrail and is connected to the right slider. The back panel is connected to the left and right guide rails through the left and right rods on its left and right sides. The wheelchair backrest is rotatably connected at the back, two magnets are arranged on the two side rods, the right elastic ring is installed between the right elastic ring connecting the front column and the lower end of the right rod, the left elastic ring is installed between the left elastic ring connecting the front column and the lower end of the left rod, the front ends of the left three-link rod and the right three-link rod are rotatably connected to the left slider and the right slider respectively, and the rear ends of the left three-link rod and the right three-link rod are rotatably connected to the lower end of the left rod and the lower end of the right rod respectively; the front end of the bottom plate is rotatably connected to the lower end of the back plate, the upper ends of the left first link and the right first link are rotatably connected to the left rod and the right rod respectively, and the left first link and the right first link are rotatably connected to the left rod and the right rod respectively. The lower ends of the rods are rotatably connected to the upper ends of the left second connecting rods and the right second connecting rods respectively, and the lower ends of the left second connecting rods and the right second connecting rods are rotatably connected to the two sides of the rear end of the base plate respectively, and two magnets are arranged on the upper sides of the lower ends of the left second connecting rods and the right second connecting rods; the lower end of the rear plate is rotatably connected to the rear end of the base plate, and the upper ends of the left five-link rod and the right five-link rod are rotatably connected to the left and right sides of the upper end of the rear plate respectively, and the lower ends of the left five-link rod and the right five-link rod are rotatably connected to the upper ends of the left four-link rod and the right four-link rod respectively, and the lower ends of the left four-link rod and the right four-link rod are rotatably connected to the left and right sides of the front end of the base plate respectively.

[0005] Preferably, a grip is laterally provided at the upper end of the left push rod and the upper end of the right push rod.

[0006] Preferably, the outer sides of the two magnets arranged on the two side rods are both S poles.

[0007] Preferably, the upper sides of the two magnets on the upper sides of the lower ends of the left two connecting rods and the right two connecting rods are both N poles.

[0008] Preferably, the left elastic ring and the right elastic ring are flexible circular ring structures with elasticity.

[0009] Preferably, a circular protrusion array made of soft silicone material is provided on the upper side of the rear plate. The circular protrusion array can increase the riding comfort of the accompanying passengers and also increase the friction to prevent the accompanying passengers from slipping while riding.

[0010] Preferably, when the multifunctional folding shelf is in a folded state, the shelf only takes up a small space, which is conducive to improving the passability of wheelchairs in narrow spaces.

[0011] Preferably, when the multifunctional folding shelf is in the one-step unfolded state, the accompanying passenger can face the rear and sit on the upper side of the rear board, which is helpful to reduce the physical exertion of the accompanying passenger and is particularly suitable for longer distance travel.

[0012] Preferably, when the multifunctional folding shelf is in the two-step unfolded state, the shelf has a large loading capacity and can hold items such as chess sets and fishing gear, making it convenient for the elderly and disabled to carry items when traveling.

[0013] The beneficial effects of the present invention are as follows: the multifunctional folding shelf has three states; in the folded state, the shelf only occupies a very small space, which is beneficial to improving the passability of wheelchairs in narrow spaces; in the one-step unfolded state, the accompanying person can face the rear and sit on the upper side of the rear board, which is beneficial to reducing the physical exertion of the accompanying person and is particularly suitable for traveling over longer distances; in the two-step unfolded state, the shelf has a larger loading capacity and can be used to place items such as chess sets and fishing gear, making it convenient for the elderly and disabled to carry goods when traveling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the shelf when it is in a folded state.

[0015] Figure 2 It is a schematic diagram of the structure when the back plate is in a vertical state when it is stretched out.

[0016] Figure 3 This is a schematic diagram of the structure of the shelf when it is unfolded in one step.

[0017] Figure 4 This is a schematic diagram of the structure of the shelf when it is in two-step expansion.

[0018] Figure 5 A schematic diagram of the structure of the backplane.

[0019] Figure numbers: 1 wheelchair backrest, 101 right connecting ear, 102 left connecting ear, 103 right handrail, 104 right guide rail, 105 right limit block, 106 right semicircular groove, 107 right elastic ring connected to the front column, 2 back plate, 201 right rod, 202 left rod, 203 right rod connecting ear, 204 left rod connecting ear, 205 upper right magnet, 206 upper left magnet, 207 right elastic ring connected to the rear column, 208 left elastic ring connected to the rear column, 3 right push rod, 4 right first connecting rod, 5 right slider, 6 right three connecting rods, 7 left push rod, 8 bottom plate, 9 left three connecting rods, 10 right two connecting rods, 1001 right lower magnet, 11 left first connecting rod, 12 left two connecting rods, 1201 left lower magnet, 13 right elastic ring, 14 right five connecting rods, 15 rear plate, 16 left four connecting rods, 17 left five connecting rods, 18 right four connecting rods. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0021] like Figures 1 to 5As shown, a multifunctional folding shelf for wheelchairs mainly includes a wheelchair backrest 1, a backboard 2, a right push rod 3, a right first connecting rod 4, a right slider 5, a right third connecting rod 6, a left push rod 7, a bottom plate 8, a left third connecting rod 9, a right second connecting rod 10, a left first connecting rod 11, a left second connecting rod 12, a right elastic ring 13, a right fifth connecting rod 14, a rear plate 15, a left fourth connecting rod 16, a left fifth connecting rod 17, and a right fourth connecting rod 18, characterized in that a left armrest is fixedly provided on the left side of the wheelchair, and a right armrest 103 is fixedly provided on the right side of the wheelchair. The left and right armrests 103 are symmetrical structures, and the rear ends of the left and right armrests 103 are vertically provided with a smooth guide circular hole; a right connecting ear 101 is provided at the right end of the upper side of the back of the wheelchair backrest 1, and a left connecting ear 102 is provided at the left end of the upper side of the back of the wheelchair backrest 1. A right guide rail 104 is provided at the lower end of the right side of the wheelchair backrest 1, and a right limiting block 105 is provided at the lower end of the right guide rail 104. A left guide rail is provided at the lower end of the left side of the wheelchair backrest 1, and a left stopper 106 is provided at the lower end of the left guide rail. The limit block is provided with a right semicircular groove 106 opening backwards at the lower right end of the back side of the wheelchair backrest 1, and a right elastic ring is horizontally arranged in the right semicircular groove 106 to connect with the front column 107; the left end of the lower left side of the back side of the wheelchair backrest 1 is provided with a left semicircular groove opening backwards, and a left elastic ring is horizontally arranged in the left semicircular groove to connect with the front column; the right slider 5 is installed on the right guide rail 104 and can slide up and down, and the left slider is installed on the left guide rail and can slide up and down, and the right slider 5 and the left slider form a left-right symmetrical structure; the A grip is laterally provided at the upper end of the right push rod 3, and the lower end of the right push rod 3 is a long round rod structure, the lower end of the long round rod structure is connected to the right slider 5 after passing through the guide circular hole at the rear end of the right handrail 103, so that pressing the right push rod 3 downward can move the right slider 5 downward; pulling the right push rod 3 upward can pull the right slider 5 upward; the left push rod 7 and the right push rod 3 are in a left-right symmetrical structure, the lower end of the left push rod 7 is connected to the left slider after passing through the guide circular hole at the rear end of the left handrail, so that the left push rod 7 can control the up and down movement of the left slider.

[0022] like Figure 3 , Figure 4 , Figure 5As shown, the back plate 2 is a plate-like structure, and a left rod 202 and a right rod 201 are fixedly arranged on its left and right sides respectively. A left rod connecting ear 204 is arranged on the left rod 202 near its upper end, and an upper left magnet 206 is fixedly arranged on the lower side of the left rod connecting ear 204, and the outer side of the upper left magnet 206 is an S pole. A left elastic ring is arranged on the inner side of the lower end of the left rod 202 to connect the rear column 208. The right rod 201 and the left rod 202 form a left-right symmetrical structure. A right rod connecting ear 203 is arranged on the right rod 201 near its upper end, and an upper right magnet 205 is fixedly arranged on the lower side of the right rod connecting ear 203, and the outer side of the upper right magnet 205 is an S pole. A right elastic ring is arranged on the inner side of the lower end of the right rod 201 to connect the rear column 207 ; The upper end of the left rod 202 is rotatably connected to the left connecting ear 102, and the upper end of the right connecting ear 101 is rotatably connected to the right connecting ear 101, so that the backboard 2 and the wheelchair backrest 1 form a rotating pair; the right elastic ring 13 is a flexible circular ring structure with elasticity, and the right elastic ring 13 is installed between the right elastic ring connected to the front column 107 and the right elastic ring connected to the rear column 207. The left elastic ring has the same structure as the right elastic ring 13, and the left elastic ring is installed between the left elastic ring connected to the front column and the left elastic ring connected to the rear column 208; the front end of the right three-link rod 6 is rotatably connected to the right slider 5, and the rear end of the right three-link rod 6 is rotatably connected to the lower end of the right rod 201; the front end of the left three-link rod 9 is rotatably connected to the left slider, and the rear end of the left three-link rod 9 is rotatably connected to the lower end of the left rod 202.

[0023] After the left push rod 7 and the right push rod 3 are pressed downward at the same time, the left slider and the right slider 5 respectively drive the front ends of the left three-link rod 9 and the right three-link rod 6 to move downward at the same time, until the two sliders pass over the front ends of the left elastic ring and the right elastic ring 13 and respectively support the left limit block and the right limit block 105, and the angle between the left three-link rod 9 and the right three-link rod 6 and the back plate 2 is an obtuse angle. In this state, the contraction elastic force of the left elastic ring and the right elastic ring 13 respectively passes through the left three-link rod 9 and the right three-link rod 6 to separate the left slider and the right slider 5. The left limit block and the right limit block 105 are respectively pressed, so that the back plate 2, the left three-link rod 9 and the right three-link rod 6, and the wheelchair backrest 1 form a stable triangular support structure, so that the shelf can bear the weight of the person sitting in the rear or the weight of the goods; at the same time, after the left push rod 7 and the right push rod 3 are pulled upward, the left slider and the right slider 5 respectively drive the front ends of the left three-link rod 9 and the right three-link rod 6 to move upward, and then the lower end of the back plate 2 is attached to the rear side of the wheelchair backrest 1 under the pulling force of the left elastic ring and the right elastic ring 13.

[0024] like Figure 3As shown, the bottom plate 8 is a flat plate structure, and the front end of the bottom plate 8 is rotatably connected to the lower end of the back plate 2; the upper end of the right first connecting rod 4 is rotatably connected to the right rod connecting ear 203, the lower end of the right second connecting rod 10 is rotatably connected to the right side of the rear end of the bottom plate 8, the lower end of the right first connecting rod 4 is rotatably connected to the upper end of the right second connecting rod 10, and a right lower magnet 1001 is fixedly arranged on the upper side of the lower end of the right second connecting rod 10, and the upper side of the right lower magnet 1001 is the N pole; the left first connecting rod The rod 11 has the same structure as the right first connecting rod 4, the upper end of the left first connecting rod 11 is rotatably connected to the left rod connecting ear 204, the left second connecting rod 12 has the same structure as the right second connecting rod 10, the lower end of the left second connecting rod 12 is rotatably connected to the left side of the rear end of the bottom plate 8, the lower end of the left first connecting rod 11 is rotatably connected to the upper end of the left second connecting rod 12, and a lower left magnet 1201 is fixedly provided on the upper side of the lower end of the left second connecting rod 12, and the upper side of the lower left magnet 1201 is an N pole;

[0025] like Figure 3 , Figure 4 As shown, the rear plate 15 is a plate-like structure, and a circular protrusion array made of soft silicone material is arranged on the upper side of the rear plate 15. The circular protrusion array can increase the riding comfort of the accompanying persons, and can also increase the friction to prevent the accompanying persons from slipping when riding. The lower end of the rear plate 15 is rotatably connected to the rear end of the base plate 8; the upper end of the right five-link 14 is rotatably connected to the right side of the upper end of the rear plate 15, the lower end of the right four-link 18 is rotatably connected to the right side of the front end of the base plate 8, and the lower end of the right five-link 14 is rotatably connected to the upper end of the right four-link 18; the left five-link 17 has the same structure as the right five-link 14, the upper end of the left five-link 17 is rotatably connected to the left side of the upper end of the rear plate 15, the left four-link 16 has the same structure as the right four-link 18, the lower end of the left four-link 16 is rotatably connected to the left side of the front end of the base plate 8, and the lower end of the left five-link 17 is rotatably connected to the upper end of the left four-link 16.

[0026] When the multifunctional folding shelf is in the folded state, Figure 1 As shown, the left elastic ring and the right elastic ring 13 pull the back plate 2 to fit tightly against the rear side of the wheelchair backrest 1, and the left slider and the right slider 5 are respectively at the upper end position of the corresponding guide rail under the support of the left three-link rod 9 and the right three-link rod 6, and the lower left magnet 1201 and the upper left magnet 206 are attracted to each other, and the lower right magnet 1001 and the upper right magnet 205 are attracted to each other, so that the bottom plate 8 fits against the rear side of the back plate 2; in the folded state, the shelf only occupies a very small space, which is conducive to improving the passability of the wheelchair in a narrow space.

[0027] When the multifunctional folding shelf is in the one-step unfolded state, Figure 3As shown, the backboard 2 is in a vertical state under the support of the left three-link rod and the right three-link rod 6, the bottom plate 8 is in a horizontal state under the pulling force of the right first link 4, the right second link 10 and the left first link 11, the left second link 12, and the rear plate 15 is located on the upper side of the bottom plate 8 and is in a horizontal state; in the one-step unfolded state, the accompanying person can face the rear and sit on the upper side of the rear plate 15, which is beneficial to reduce the physical exertion of the accompanying person and is particularly suitable for longer distance travel.

[0028] When the multifunctional folding shelf is in the two-step unfolding state, Figure 4 As shown, the back plate 2 is in a vertical state under the support of the left three-link and the right three-link 6, the bottom plate 8 is in a horizontal state under the pulling force of the right first link 4, the right second link 10 and the left first link 11, the left second link 12, the rear plate 15 flips backward, and the rear plate 15 is in a backward tilted state under the pulling force of the right fourth link 18, the right fifth link 14 and the left fourth link 16, the left fifth link 17; in the two-step unfolded state, the shelf has a large loading capacity, and can be used to place items such as chess sets and fishing gear, making it convenient for the elderly and disabled to carry goods when traveling.

Claims

1. A multifunctional folding shelf for a wheelchair, mainly comprising a wheelchair backrest (1), a back plate (2), a right push rod (3), a right first connecting rod (4), a right slider (5), a right third connecting rod (6), a left push rod (7), a bottom plate (8), a left third connecting rod (9), a right second connecting rod (10), a left first connecting rod (11), a left second connecting rod (12), a right elastic ring (13), a right fifth connecting rod (14), a rear plate (15), a left fourth connecting rod (16), a left fifth connecting rod (17), and a right fourth connecting rod (18), characterized in that: The left and right sides of the wheelchair are respectively fixedly provided with a left handrail and a right handrail (103), and the rear ends of the two handrails are respectively provided with a smooth guide circular hole in the vertical direction. The lower ends of the left and right sides of the wheelchair backrest (1) are respectively provided with a left guide rail and a right guide rail (104), and the lower ends of the two guide rails are respectively provided with a left limit block and a right limit block (105). The left semicircular groove and the right semicircular groove (106) at the left and right ends of the lower back of the wheelchair backrest (1) are respectively provided with a left elastic ring connected to the front column and a right elastic ring connected to the front column (107). The left slider and the right slider (5) are respectively installed on the left guide rail and the right guide rail and can move up and down. The long round rod structure at the lower end of the left push rod (7) passes through the guide circular hole at the rear end of the left handrail and is connected to the left slider. The long round rod structure at the lower end of the right push rod (3) passes through the guide circular hole at the rear end of the right handrail (103) and is connected to the right slider (5). The backboard (2) is rotatably connected to the rear side of the wheelchair backrest (1) through the left rod (202) and the right rod (20) on the left and right sides thereof; two magnets are arranged on the two side rods; the right elastic ring (13) is installed between the right elastic ring connecting the front column (107) and the lower end of the right rod (20); the left elastic ring is installed between the left elastic ring connecting the front column and the lower end of the left rod (202); the front ends of the left three-link rod (9) and the right three-link rod (6) are rotatably connected to the left slider and the right slider (5) respectively; the rear ends of the left three-link rod (9) and the right three-link rod (6) are rotatably connected to the lower end of the left rod (202) and the lower end of the right rod (201) respectively; The front end of the bottom plate (8) is rotatably connected to the lower end of the back plate (2); the upper ends of the left first connecting rod (11) and the right first connecting rod (4) are rotatably connected to the left rod (202) and the right rod (201) respectively; the lower ends of the left first connecting rod (11) and the right first connecting rod (4) are rotatably connected to the upper ends of the left second connecting rod (12) and the right second connecting rod (10) respectively; the lower ends of the left second connecting rod (12) and the right second connecting rod (10) are rotatably connected to both sides of the rear end of the bottom plate (8) respectively; and two magnets are arranged on the upper sides of the lower ends of the left second connecting rod (12) and the right second connecting rod (10); The lower end of the rear plate (15) is rotatably connected to the rear end of the bottom plate (8); the upper ends of the left five-link rod (17) and the right five-link rod (14) are rotatably connected to the left and right sides of the upper end of the rear plate (15); the lower ends of the left five-link rod (17) and the right five-link rod (14) are rotatably connected to the upper ends of the left four-link rod (16) and the right four-link rod (18); and the lower ends of the left four-link rod (16) and the right four-link rod (18) are rotatably connected to the left and right sides of the front end of the bottom plate (8).

2. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: A grip is laterally provided at the upper ends of the left push rod (7) and the right push rod (3).

3. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: The outer sides of the two magnets arranged on the two side rods are both S poles.

4. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: The upper sides of the two magnets on the upper sides of the lower ends of the left two connecting rods (12) and the right two connecting rods (10) are both N poles.

5. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: The left elastic ring and the right elastic ring (13) are flexible circular ring structures with elasticity.

6. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: The upper side of the rear plate (15) is provided with a circular protrusion array made of soft silicone material. The circular protrusion array can increase the riding comfort of the accompanying passenger and also increase the friction force to prevent the accompanying passenger from slipping while riding.

7. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: When the multifunctional folding shelf is in a folded state, the shelf only occupies a very small space, which is beneficial to improving the passability of wheelchairs in narrow spaces.

8. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: When the multifunctional foldable shelf is in the one-step unfolded state, the accompanying person can face the rear and sit on the upper side of the rear board (15), which is beneficial to reducing the physical exertion of the accompanying person and is particularly suitable for traveling over long distances.

9. The multifunctional folding shelf for wheelchairs according to claim 1, characterized in that: When the multifunctional folding shelf is in the two-step unfolding state, the shelf has a large loading capacity and can be used to place items such as chess sets and fishing gear, making it convenient for the elderly and disabled to carry items when traveling.

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