TWI698234B - Wheelchair pedal structure - Google Patents

Abstract

The present invention is a wheelchair pedal structure. A one-way angle adjustment group is arranged between the pedals. The one-way angle adjustment group is composed of a fixed plate, a ratchet wheel and a ratchet block, wherein the foot The pedal has a linkage shaft pivoted on the fixed plate, and the ratchet wheel is fixed on the linkage shaft of the pedal, and the ratchet wheel has a series of teeth on the periphery, and the ratchet block is pivoted on the fixed plate , And the ratchet block has at least one ratchet that can be selectively unidirectionally engaged with the ratchet teeth, and an elastic piece is provided on one side of the ratchet block, and the ratchet block can use the elastic force of the elastic piece to keep the ratchet in engagement On the corresponding teeth of the ratchet, or being pushed away to release the ratchet teeth, the pedal can adjust the angle of the pedal, so it can further meet the needs of users to support the feet of different heights, and can use the feet to perform Lift up, retract, release or adjust the angle upwards without manual operation, so that neither the user or the caregiver needs to bend or squat down to complete, greatly reducing the burden on the operation such as joint wear, and more It can maintain hand hygiene and avoid the spread of germs.

Description

Wheelchair footrest structure

The present invention belongs to a folding technology of wheelchair pedals, and specifically refers to a wheelchair pedal structure that does not need to be folded or unfolded by hand, so that the pedals can be folded conveniently to reduce the user's bending and turning of the feet The load of the pedal, and can maintain the caregiver's hand hygiene greatly improves its practicality.

By the way, wheelchair is a very important medical equipment, and it is also an indispensable important equipment for the elderly and patients with mobility impairments. Based on the consideration of convenient portability and space storage, foldable wheelchairs are the most common consumers. Accepted. As shown in the first figure, existing wheelchairs basically have a foldable bracket group (10), two rear wheels (11) arranged on both sides of the bracket group (10), and two are arranged on both sides of the bracket group (10). The front wheel (12) of the bracket set (10), a seat cushion back set (15) set on the bracket set (10), and in order to facilitate the support of the user's feet, a foot support rod ( 20), and the bottom ends of the two foot support rods (20) are respectively provided with a pedal (30) that can be folded relatively, and the pedals (30) can be in a horizontal position for pedaling and a pedal for folding When the user wants to sit in a wheelchair, he must first lift the footrest (30) to the vertical position to facilitate the user to enter and exit the seat cushion back set (15), and when the user is sitting When in a wheelchair, the foot pedals (30) must be pulled down to a horizontal position for the user's foot to step on and support. On the contrary, when the user wants to leave the wheelchair, The pedals (30) need to be lifted up again to form a vertical position; therefore, no matter if the wheelchair needs to pull or lift the pedals (30) many times during the use process, the pedals (30) are (30) It is set at a position where the wheelchair is close to the ground. It needs to bend over during the action. For the elderly or patients, it will inevitably cause great trouble and inconvenience. Even the caregiver has to bend over or squat down to operate. , It is a great burden on the waist and leg joints. Furthermore, since the wheelchair is often used in medical units, the foot pedal (30) may be contaminated. If the user or caregiver pulls the foot pedal (30) by hand, it will Risk of pollution; for this reason, some companies have developed patent precedents such as China Patent No. M274097 and No. M537895. Among them, the M274097 case is to install an elastic member between the pedal and its shaft, so that the pedal can automatically stand vertically when not in use, and use the weight of the user's foot to support the pedal horizontally, but its During use, if the user's foot slips off accidentally or slightly lifts the foot to change the angle, the pedal will bounce up and fold by itself, which not only causes inconvenience to use, but also may pinch the foot if it is careless unit. As for No. M537895, it mainly uses an additional pull rod for the user to actuate and limit the pedal, but its structure is complicated, which not only increases the cost of manufacturing and assembly, but also has more trouble in operation. At the same time, too many moving parts increase the risk of pinching the user. In addition, due to the setting angle, it is mainly operated by the user, which causes inconvenience to the use of other caregivers.

In other words, the existing ones cannot take into account the effects of simple structure and easy operation, and there is also a large burden of movement when operating by hand, and it will affect the hand hygiene of the user or caregiver. Therefore, this problem needs to be improved or solved. How to solve this problem is a very important subject.

In view of this, the present inventor has conducted in-depth discussions on the aforementioned wheelchair footboard use problems, and has been actively seeking solutions through years of experience in research and development and manufacturing in related industries. After continuous efforts in research and trial production, he finally succeeded Developed a wheelchair pedal structure, which can overcome the inconvenience and trouble caused by manual operation.

Therefore, the main purpose of the present invention is to provide a wheelchair footrest structure, whereby the footrest can be raised, folded or laid down without manual operation, so as to reduce the burden on operation and greatly improve its use. Convenience.

In addition, the second main purpose of this creation is to provide a wheelchair footrest structure, which can maintain the hand hygiene of the user or caregiver and enhance its practicality.

Furthermore, another main purpose of this creation is to provide a wheelchair footrest structure, which can adjust the angle of the footrest to meet the user's requirement for the height of supporting feet and improve the comfort.

Accordingly, the present invention mainly achieves the aforementioned purpose and performance through the following technical means: the wheelchair has a bracket group, and the front two sides of the bracket group are respectively provided with a foot support rod, and the foot support rods are divided into two parts. Equipped with a foot pedal, which can move between a horizontal position for stepping on and a vertical position for upward folding, and a one-way angle adjustment group is set between the foot support rod and the foot pedal; the one-way The angle adjustment group is composed of a fixed plate, a ratchet wheel and a ratchet block, wherein the fixed plate is erected on the bottom end of the foot support rod, and the pedal has a fixed plate pivoted Linkage shaft; and the ratchet is fixed on the linkage shaft of the pedal, and the ratchet The peripheral edge has a series of teeth, and the ratchet block is pivoted on the fixed plate, and the ratchet block has at least one ratchet that can selectively engage with the ratchet teeth in one direction, and one side of the ratchet block is provided with an elastic member , The ratchet block can use the elastic force of the elastic member to keep the ratchet teeth engaged with the corresponding teeth of the ratchet wheel, or be pushed away to release the ratchet teeth.

Thereby, through the demonstration of the aforementioned technical means, the footrest of the wheelchair footrest structure of the present invention can be lifted up, folded, released or adjusted upward by the feet, without manual operation, so whether it is a user Or caregivers do not need to bend over or squat down to complete, which greatly reduces the burden on the operation such as joint wear, improves the convenience of use, and can maintain hand hygiene, avoid the spread of germs, and can adjust the pedals The angle of the board, therefore, can further meet the different height needs of users to support the feet, and can improve its comfort, thereby effectively enhancing its added value and enhancing its economic benefits.

The present invention further utilizes the following technical means to achieve the aforementioned advantages and practical values; for example, a first stop point corresponding to the horizontal position of the pedal and a first stop point corresponding to the vertical position of the pedal are protruded on the surface of the ratchet. For the second gear point, and the ratchet block is fixedly provided with a shift lever located between the first and second gear points, so that when the shift lever moves the first stop point, the ratchet block can engage with the ratchet wheel, otherwise the shift lever shifts When the second stop point is moved, the ratchet block can release the ratchet.

The elastic member can be a U-shaped reed, a spiral compression spring, or a bow-shaped reed.

The elastic member is composed of a spring arranged in the foot support rod and a top post supported by the spring against the periphery of the ratchet block.

Wherein the fixed plate is provided with a shield, which can cover and protect Ratchet and ratchet block.

In order to enable your reviewer to further understand the composition, features and other purposes of the present invention, the following is a list of some preferred embodiments of the present invention, and detailed descriptions in conjunction with the drawings. At the same time, those familiar with the technical field can follow this Specific implementation of the instructions.

(10)‧‧‧Stent group

(11)‧‧‧Rear wheel

(12)‧‧‧Front wheel

(15)‧‧‧Chair Cushion Back Set

(20)‧‧‧Foot Support

(30)‧‧‧Pedals

(35)‧‧‧Link shaft

(50)‧‧‧Angle adjustment group

(60)‧‧‧Fixed plate

(70)‧‧‧ Ratchet

(71)‧‧‧Rodent

(72)‧‧‧First gear

(73)‧‧‧Second Gear Point

(80)‧‧‧ Ratchet Block

(81)‧‧‧ Ratchet

(82)‧‧‧Shift lever

(85)‧‧‧Elastic parts

(86)‧‧‧Spring

(87)‧‧‧Top Pillar

The first picture: a schematic diagram of the three-dimensional appearance of an existing wheelchair.

Figure 2: is a schematic diagram of the appearance of the pedal structure of the wheelchair of the present invention.

The third figure: is a three-dimensional exploded schematic diagram of the wheelchair footrest structure of the present invention, for showing the main composition and state of its various components.

The fourth figure: is the front cross-sectional schematic diagram of the wheelchair footrest structure of the present invention when vertically folded.

Figures 5 and 6: are schematic diagrams of the front cross-sectional action of the wheelchair footrest structure of the present invention when the footrest is released.

Figure 7: is a schematic front sectional view of the wheelchair footrest structure of the present invention when the footrest is supported flat.

Figure 8: It is a schematic diagram of the front cross-sectional action of the foot pedal of the wheelchair foot pedal structure of the present invention when the angle is adjusted.

The present invention is a wheelchair footrest structure. The accompanying drawings illustrate the specific embodiments of the present invention and its components, with all references to front and back, left and right, top and bottom, top and bottom, and horizontal and vertical. It is only used for the convenience of description, not to limit the present invention, nor to restrict its components to any position or spatial direction. The drawings and the size specified in the specification can be used without departing from the scope of patent application of the present invention. Within the scope, changes are made according to the design and requirements of specific embodiments of the present invention.

The detailed structure of the wheelchair footrest structure of the present invention is shown in the first and second figures. A unidirectional angle adjustment group is provided between the foot support rod (20) and the footrest (30) of the wheelchair support group (10) (50), the pedal (30) can be moved between a horizontal position for stepping on [as shown in the second and seventh pictures] and a vertical position for upward folding [as shown in the fourth picture], and The foot pedal (30) can be adjusted upwards in sections from a horizontal position; as shown in the second, third and fourth figures, the one-way angle adjustment group (50) consists of a fixed plate (60) and a ratchet wheel ( 70) and a ratchet block (80), wherein the fixed plate (60) is set upright on the bottom end of the foot support rod (20), and the foot pedal (30) has a linkage shaft (35), so that the pedal (30) can be pivoted on the side of the fixed plate (60) by the linkage shaft (35), so that the pedal (30) can be pivoted relative to the side of the foot support rod (20) Turn; and the ratchet (70) is fixed on the linkage shaft (35) of the pedal (30), and the ratchet (70) can be attached to the surface of the fixed plate (60), and the linkage shaft (35) ) Synchronous rotation. Furthermore, the peripheral edge of the ratchet wheel (70) has a series of teeth (71), and the surface of the ratchet wheel (70) is convexly provided with a first stop point (72) corresponding to the horizontal position of the pedal (30) and a corresponding The second stop point (73) of the vertical position of the pedal (30); as for the ratchet block (80) is pivoted on the fixed plate (60), and the ratchet block (80) has at least one The ratchet (81) selectively engages with the ratchet (70) teeth (71), so that the ratchet (70) can only rotate in one direction when the ratchet block (80) is engaged, and the ratchet block (80) is fixed There is a shift lever (82), the shift lever (82) can be the first stop point (72) [as shown in the second figure] or the second stop point of the ratchet (70) (73) [As shown in the fourth figure] The ratchet block (80) is selectively moved and synchronously driven, and the one-way angle adjustment group (50) is different from the ratchet block (80) from the ratchet wheel (70). An elastic piece (85) is provided on the side, and the elastic piece (85) can press against the ratchet block (80), so that the ratchet block (80) and the ratchet teeth (81) can maintain the occlusion by the elastic force of the elastic piece (85) On the tooth (71) corresponding to the ratchet wheel (70), the elastic member (85) can be a U-shaped reed, a helical compression spring, or a bow-shaped reed, etc. The elastic member (85) of the present invention is composed of a design The spring (86) in the foot support rod (20) and the top post (87) supported by the spring (86) against the periphery of the ratchet block (80) are the main embodiments; furthermore, the fixing plate ( 60) is provided with a protective cover [not shown in the figure], which can correspond to the shape of the fixing plate (60), and can be fixed by bolts to cover and protect the ratchet wheel (70) and the ratchet block (80); By this, the group constitutes a wheelchair footrest structure that does not require manual operation and can adjust the angle in one direction.

As for the actual use state of the present invention, please refer to the first, second and fourth figures. In operation, the footrests (30) on both sides of the wheelchair can be lifted up respectively, so that the footrests (30) are in line with the feet. The collapsing shape of the parallel vertical position of the support rod (20) [as shown in the fourth figure] makes the pedal (30) drive the ratchet wheel (70) to rotate, so that the first stop point (72) of the ratchet wheel (70) can be attached Lean on the side of the lever (82) of the ratchet block (80), and allow the ratchet block (80) and the ratchet teeth (81) to engage with the corresponding teeth (71) of the ratchet wheel (70), so that the pedal (30) ) Is positioned and does not rotate downwards, so that the wheelchair has the maximum space between the two foot supports (20) to facilitate the user to enter and exit the wheelchair; and when the user needs to step on the pedals (30) to obtain support , As shown in Figures 5 and 6, the user or caregiver can continue to move the foot pedal (30) to the side different from the horizontal position with the foot, so that the foot pedal (30) drives the ratchet wheel (70) The first stop point (72) moves the shift lever (82) of the ratchet block (80), and then pushes the ratchet tooth (81) of the ratchet block (80) to disengage the tooth (71) of the ratchet wheel (70), and top The rising elastic member (85) generates a restoring force, so that the ratchet wheel (70) of the pedal (30) can be released, as shown in the seventh figure, so that the pedal (30) can drive the second gear of the ratchet wheel (70) Point (73) to move the lever (82) of the ratchet block (80), and the elastic member (85) restores the elastic force to push the ratchet (81) of the ratchet block (80) to engage and engage the ratchet wheel (70) again On the rod (71), the foot pedal (30) can be fixed in a horizontal position for the user to step on; in addition, as shown in the eighth figure, when there is a need to raise the foot pedal (30), use The person or the caregiver can push the pedal (30) up from the bottom of the pedal (30) with the foot, so that the pedal (30) drives the different teeth (71) of the ratchet wheel (70) to move the ratchet block ( 80), so that the ratchet block (80) can use the ratchet teeth (81) to engage with the ratchet wheel (70) in one direction, so that the foot pedal (30) can be adjusted upwards without losing the teeth downwards due to gravity , So that the user can adjust the foot pedal (30) to a more suitable height to improve the comfort.

From the foregoing description of the structure and action, it can be seen that the foot pedal (30) of the wheelchair foot pedal structure of the present invention can be lifted up, folded, released or adjusted upward by the feet, without manual operation. It can be completed without bending or squatting down by the user or caregiver, greatly reducing the burden on the operation such as joint wear, and improving the convenience of use. In addition, it can maintain hand hygiene and avoid the spread of germs. The angle of the foot pedal (30) is adjusted, so that the different height requirements of the user's supporting feet can be further met, and the comfort can be improved. It is worth mentioning that the number of teeth (71) on the periphery of the ratchet wheel (70) of the pedal (30) determines the number of angle changes. The number of teeth (71) can be set according to actual needs. Improve its practicality.

In summary, it can be understood that the present invention is a novel creation with excellent creativity. In addition to effectively solving the problems faced by habitants, it also greatly improves the efficiency. There is no identical or similar product creation in the same technical field. Or it can be used publicly, and at the same time it has enhanced efficacy. Therefore, the present invention has met the "novelty" and "progressive" requirements of a new type patent, and it is a new type patent application according to law.

(20)‧‧‧Foot Support

(30)‧‧‧Pedals

(35)‧‧‧Link shaft

(50)‧‧‧Angle adjustment group

(60)‧‧‧Fixed plate

(70)‧‧‧ Ratchet

(71)‧‧‧Rodent

(72)‧‧‧First gear

(80)‧‧‧ Ratchet Block

(81)‧‧‧ Ratchet

(82)‧‧‧Shift lever

(85)‧‧‧Elastic parts

Claims (4)

A wheelchair pedal structure, the wheelchair has a bracket group, and the front two sides of the bracket group are respectively provided with a foot support rod, and the foot support rods are separately provided with a foot pedal, which can be used for stepping on Move between the horizontal position and a vertical position for upward folding, and there is a one-way angle adjustment group between the foot support rod and the pedal; the one-way angle adjustment group is composed of a fixed plate, a ratchet and a ratchet The fixed plate is arranged upright at the bottom end of the foot support rod, and the pedal has a linkage shaft pivoted on the fixed plate; and the ratchet is fixed on the pedal The linkage shaft, and the ratchet wheel has a series of teeth on the periphery, and the ratchet block is pivoted on the fixed plate, and the ratchet block has at least one ratchet that can selectively engage with the ratchet teeth in one direction, and the ratchet One side of the tooth block is provided with an elastic member, and the ratchet block can use the elastic force of the elastic member to keep the ratchet teeth engaged with the corresponding teeth of the ratchet wheel or be pushed away to release the ratchet teeth; and a corresponding foot protrudes on the surface of the ratchet wheel The first stop point in the horizontal position of the pedal and the second stop point corresponding to the vertical position of the pedal, and the ratchet block is fixedly provided with a lever located between the first and second stop points, so that the lever is set When the first stop point is moved, the ratchet block can bite into the ratchet, and when the second stop point is moved by the lever, the ratchet block can release the ratchet; thereby, the assembly structure can be adjusted in one direction without manual operation. Angled wheelchair pedal structure. For the wheelchair pedal structure described in item 1 of the scope of patent application, the elastic member can be a U-shaped reed, a spiral compression spring, or a bow-shaped reed. The wheelchair pedal structure described in item 1 of the scope of patent application, wherein the elastic member is composed of a spring arranged in the foot support rod and a top post supported by the spring against the periphery of the ratchet block . For the wheelchair pedal structure described in item 1 of the scope of patent application, a shield is provided on the fixed plate, and the shield can cover and protect the ratchet wheel and the ratchet block.

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