Saddle frame rotating type wheelchair for switching between front and rear

Abstract

To provide a saddle frame rotary type wheelchair for forward / backward switching.SOLUTION: A saddle frame (11) is provided, a lower frame (16) is mounted below the saddle frame (11), a base frame (17) is disposed on the lower frame (16), a rotation cylinder (30) is mounted between the base frames (17), a driven gear (42) is mounted on a central lower portion of the base frame (17), a driving gear (32) engaged with the driven gear (42) is formed on a rod (31) of the rotation cylinder (30), and a center rod (40) rotated in conjunction with an operation of the driven gear (42) is mounted above a central upper portion of the base frame (17), An upper end of the center rod (40) is coupled to a bottom surface of the seat frame (13), and the saddle frame (11) rotates according to a linear motion of the rotation cylinder (30), so that a user can arbitrarily select a direction of the saddle frame (11).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This invention was researched with support from the Gyeonggi Economic Science Foundation under the umbrella of Gyeonggi Province, Republic of Korea (Project No. A2323002).

[0002] The present invention relates to a wheelchair, and more specifically to a forward / backward switching saddle frame rotating wheelchair that can automatically rotate the saddle frame 180 degrees, allowing the wheelchair's running direction to be freely set taking into account the road surface conditions and the user's inclinations, etc. [Background technology]

[0003] The wheelchair to which this invention pertains is generally a chair-like device equipped with wheels so that people with disabilities or physically weak elderly people can move around while seated, and is a means of short-distance transportation used by elderly or physically disabled people to participate in work, home and leisure life.

[0004] The reason why wheelchairs are limited to short-distance transportation can be seen in their structure. Typically, wheelchairs are equipped with small-diameter driven wheels at the front that rotate 360 ​​degrees and large-diameter drive wheels at the rear, and the user drives the drive wheels manually or electrically to move the wheelchair.

[0005] However, because the small diameter driven wheels are located at the front of the wheelchair in the direction of travel, the wheelchair cannot climb irregularly bumpy road surfaces or high steps. Therefore, due to the structural reason that the small diameter driven wheels are located at the front of the wheelchair in the direction of travel, it is currently very difficult to use a wheelchair as a means of long-distance transportation. Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, this invention was created to solve the problems caused by the small diameter driven wheels being positioned at the front of the traveling direction when traveling long distances using conventional wheelchairs, and its purpose is to provide a forward / backward switchable saddle frame rotating wheelchair that can freely select the traveling direction so that the large diameter driving wheels can be positioned at the front of the traveling direction, taking into account the inclinations of the wheelchair user and the condition of the road surface, etc. [Means for solving the problem]

[0007] The specific configuration of the forward / backward switching saddle frame rotating wheelchair of the present invention is as follows: a saddle frame 11 is provided; a foot support frame 12 is attached to one side of the saddle frame 11; a backrest frame 14 is attached to the other side of the saddle frame 11; a seat frame 13 is attached to the center of the saddle frame 11; a lower frame 16 is attached below the saddle frame 11; a base frame 17 is disposed on the lower frame 16; a rotating cylinder 30 is attached between the base frames 17; and the base frame 17 is attached to the seat frame 13. A driven gear 42 is attached to the lower center of the seat frame 17, and a driving gear 32 that meshes with the driven gear 42 is formed on the rod 31 of the rotating cylinder 30. A center rod 40 that rotates in conjunction with the operation of the driven gear 42 is attached to the upper center of the base frame 17, and the upper end of the center rod 40 is connected to the bottom surface of the seat frame 13. The saddle frame 11 rotates with the linear movement of the rotating cylinder 30, allowing the user to freely select the direction of the saddle frame 11. [Effects of the Invention]

[0008] By using the forward / backward switching saddle frame rotating wheelchair of the present invention, the direction of travel of the wheelchair can be selected taking into account the user's inclinations and road conditions, etc., which has the advantageous effect of allowing users to enjoy different driving sensations and performances using a single wheelchair. [Brief explanation of the drawings]

[0009] [Figure 1]FIG. 1 is a perspective view for explaining problems with a conventional wheelchair. [Figure 2] 1 is a perspective view of a forward / rearward switching saddle frame rotating wheelchair according to the present invention; [Figure 3] 1 is a perspective view illustrating a wheelchair in which the traveling direction is changed as the rotating cylinder of the present invention is operated. FIG. [Figure 4] FIG. 2 is a perspective view illustrating an inclined cylinder according to the present invention. [Figure 5] FIG. 2 is a perspective view illustrating an inclined cylinder according to the present invention. [Figure 6] FIG. 2 is a perspective view illustrating a lifting cylinder according to the present invention. [Figure 7] FIG. 2 is a perspective view illustrating a lifting cylinder according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Below, we will explain the technical configuration and effects of preferred embodiments that can achieve the object of the present invention. We will explain this while comparing it with the problems of conventional technology, and if the specific explanation of known functions and configurations related to the present invention is merely an exaggeration that does not match the gist of the present invention, we will omit detailed explanations thereof.

[0011] Figure 1 is a perspective view illustrating the problems with a conventional wheelchair. The wheelchair shown in Figure 1 has a saddle frame 11 attached to the top, a foot support frame 12 for attaching foot rests attached to the front of the saddle frame 11, a backrest frame 14 attached to the rear of the saddle frame 11, a lower frame 16 attached below the saddle frame 11, a small-diameter driven wheel 21 attached to the front end of the lower frame 16, and a large-diameter drive wheel 20 attached to the rear end of the lower frame 16. This is a manual wheelchair that moves by rolling the drive wheel 20 by hand.

[0012] The reason why wheelchairs are used mainly as a means of short-distance transportation in the workplace, at home, and for leisure is that the small diameter driven wheels 21 are located at the front end in the direction of travel.

[0013] In other words, because the small diameter driven wheel 21 is located at the front of the wheelchair in the direction of travel, the wheelchair cannot climb irregularly bumpy road surfaces or high steps, so there is a structural reason why the radius of movement of the wheelchair is unavoidably reduced to a short distance.

[0014] The present invention relates to a forward / backward switchable saddle frame rotating wheelchair that allows the wheelchair user to freely select the running direction so that the large diameter drive wheels 20 are positioned at the leading edge of the running direction, taking into account the user's own inclinations as well as the condition of the road surface.

[0015] FIG. 2 is a perspective view of a forward / backward switching saddle frame rotating wheelchair according to the present invention, in which various frames are partially cut away to show only one side for better understanding.

[0016] The wheelchair shown in Figure 2 is equipped with a saddle frame 11, with a foot support frame 12 attached to one side of the saddle frame 11, a backrest frame 14 attached to the other side of the saddle frame 11, a seat frame 13 attached to the center of the saddle frame 11, a lower frame 16 attached below the saddle frame 11, a small-diameter driven wheel 21 attached to one side of the lower frame 16, and a large-diameter drive wheel 20 attached to the other side of the lower frame 16, and is an electric wheelchair that runs by a motor-driven system.

[0017] As shown in FIG. 2, a base frame 17 is disposed on the lower frame 16, a rotary cylinder 30 is mounted between the base frames 17, a driven gear 42 is mounted on the lower center of the base frame 17, and a driving gear 32 that meshes with the driven gear 42 is formed on the rod 31 of the rotary cylinder 30.

[0018] One side of the rotary cylinder 30 is constrained to the base frame 17, and the rod 31 of the rotary cylinder 30 is positioned without being constrained by a conveying means such as a rail, so that the linear motion of the rotary cylinder 30 can be smoothly performed.

[0019] In addition, a center rod 40 is mounted on the upper center of the base frame 17, and rotates in conjunction with the operation of the driven gear 42. The upper end of the center rod 40 is connected to the bottom surface of the seat frame 13.

[0020] Therefore, when the rod 31 moves linearly in the rotating cylinder 30, the driven gear 42 rotates due to the driving gear 32 formed on the rod 31, and as the driven gear 42 rotates, the center rod 40 connected to the seat frame 13 rotates. As a result, the saddle frame 11 rotates 180°, and the line of sight of the user seated on the saddle frame 11 is switched to face the large-diameter drive wheel 20.

[0021] That is, Figure 3 is a perspective view for explaining a wheelchair in which the running direction is changed as the rotating cylinder 30 in the present invention is operated, and the saddle frame 11 shown in Figure 2 is a view in which the line of sight of the seated user is directed toward the small-diameter driven wheel 21, while the saddle frame 11 shown in Figure 3 is a view in which the line of sight of the seated user is directed toward the large-diameter drive wheel 20.

[0022] As shown in Figures 2 and 3, an armrest frame 15 is attached to one side of the saddle frame 11, and an operating unit 70 is attached to the armrest frame 15. The operating unit 70 not only steers the wheels of the wheelchair and adjusts the speed, but also controls the components attached to the wheelchair, such as the rotating cylinder 30, the tilting cylinder 50, and the lifting cylinder 60.

[0023] The user sends a signal to the rotating cylinder 30 via the operating unit 70, and based on the signal from the operating unit 70, the rod 31 in the rotating cylinder 30 moves linearly as shown by the arrow in Figure 2. This causes the drive gear 32 formed on the rod 31 to rotate the driven gear 42 clockwise as shown by the arrow, and as the driven gear 42 rotates, the center rod 40 connected to the seat frame 13 rotates. As a result, the saddle frame 11 rotates 180 degrees, and the line of sight of the user seated on the saddle frame 11 is switched to face the large-diameter drive wheel 20, as shown in Figure 3.

[0024] As described above, the direction of the saddle frame 11 can be set freely and easily using a simple operating method, so the wheelchair's running direction can be easily switched to the side where the large-diameter drive wheels 20 are located, taking into account the user's running tendencies and the road conditions, etc.

[0025] 4 and 5 are perspective views for explaining the tilt cylinder 50 of the present invention, and for explaining that the foot support frame 12 is converted to tilt as the tilt cylinder 50 of the present invention is operated.

[0026] As shown in FIG. 4, a foot support frame 12 is rotatably attached to one side of the saddle frame 11 via a hinge shaft 19, an auxiliary frame 18 is attached to the foot support frame 12, and a tilt cylinder 50 is attached between the auxiliary frame 18 and the seat frame 13.

[0027] The user sends a signal to the tilt cylinder 50 via the operating unit 70, and based on the signal from the operating unit 70, the tilt cylinder 50 moves linearly as shown by the arrow in Figure 4, causing the foot support frame 12 to rotate upward around the hinge axis 19, and the foot support frame 12 is converted to tilt as shown by the two-dot chain line in Figure 5.

[0028] In this way, if the foot support frame 12 is converted to tilt upward while rotating clockwise using the tilt cylinder 50, as shown in Figures 2 and 3, the foot support frame 12 can be prevented from interfering with other components while the saddle frame 11 is rotating, making it even easier to change the direction of travel.

[0029] 6 and 7 are perspective views for explaining the lifting cylinder 60 in the present invention, and are perspective views for explaining that the saddle frame 11 rises as the lifting cylinder 60 in the present invention operates.

[0030] As shown in FIG. 6, the seat frame 13 is attached to the center of the saddle frame 11, the base frame 17 is disposed on the lower frame 16, and the center rod 40 is attached upward to the center upper part of the base frame 17. As shown in FIG. 7, the lifting rod 41 is attached inside the center rod 40, and the lifting rod 41 is connected to the bottom surface of the seat frame 13, and the lifting cylinder 60 is attached between the seat frame 13 and the base frame 17.

[0031] The user sends a signal to the lifting cylinder 60 via the operating unit 70, and based on the signal from the operating unit 70, the lifting cylinder 60 moves linearly as shown by the arrow in Figure 6. As shown in Figure 7, the lifting rod 41 is pulled upward from the center rod 40, and the saddle frame 11 and seat frame 13 are lifted upward, changing the height.

[0032] In this way, if the height is changed by lifting the saddle frame 11 upward using the lifting cylinder 60, as shown in Figures 2 and 3, the foot support frame 12 can be prevented from interfering with other components while the saddle frame 11 is rotating, making it easier to change the direction of travel.

[0033] As explained above, by using the forward / backward switching saddle frame rotating wheelchair of the present invention, the traveling direction of the wheelchair can be selected taking into consideration the user's inclinations and road conditions, etc., thereby achieving the effective effect of being able to enjoy different traveling sensations and performances using a single wheelchair. [Explanation of symbols]

[0034] 10: Wheelchair 11: Saddle frame 12: Foot support frame 13: Seat frame 14: Backrest frame 15: Armrest frame 16: Lower frame 17: Base frame 18: Auxiliary frame 19: Hinge axis 20: Drive wheel 21: Driven wheel 30: Rotating cylinder 31: Rod 32: Drive gear 40: Center bar 41: Lifting rod 42: Driven gear 50: Inclined cylinder 60: Lifting cylinder 70:Operation unit

Claims

1. A saddle frame (11) is provided, with a foot support frame (12) attached to one side of the saddle frame (11), a backrest frame (14) attached to the other side of the saddle frame (11), a seat frame (13) attached to the center of the saddle frame (11), a lower frame (16) attached below the saddle frame (11), a base frame (17) disposed on the lower frame (16), a rotating cylinder (30) attached between the base frames (17), and a driven gear (42) attached to the lower center of the base frame (17). A driving gear (32) that meshes with the driven gear (42) is formed on the rod (31) of the rotating cylinder (30), and a center rod (40) that rotates in conjunction with the operation of the driven gear (42) is attached to the upper center of the base frame (17), and the upper end of the center rod (40) is connected to the bottom surface of the seat frame (13).The saddle frame (11) rotates with the linear movement of the rotating cylinder (30), allowing the user to freely select the direction of the saddle frame (11), making this a forward / backward switchable rotating saddle frame wheelchair.

2. 2. The wheelchair with a rotating saddle frame for forward / rearward switching according to claim 1, characterized in that the foot support frame (12) is rotatably attached to the saddle frame (11) via a hinge shaft (19), an auxiliary frame (18) is attached to the foot support frame (12), and a tilting cylinder (50) is attached between the auxiliary frame (18) and the seat frame (13), so that the foot support frame (12) tilts in accordance with the linear movement of the tilting cylinder (50), thereby allowing the user to arbitrarily select the tilt of the foot support frame (12).

3. A lifting rod (41) is attached inside the central rod (40), the upper end of the lifting rod (41) is connected to the bottom surface of the seat frame (13), and a lifting cylinder (60) is attached between the seat frame (13) and the base frame (17), so that the saddle frame (11) is raised and lowered according to the linear movement of the lifting cylinder (60), thereby allowing the user to freely select the height of the saddle frame (11).

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