TW202337418A - Chair frame of wheelchair for improving sitting comfort during usage and increasing receiving space of chair frame - Google Patents

Abstract

A chair frame of wheelchair includes a base unit, a sitting unit, a rotation driving unit, and a cushion unit. The base unit includes a bottom frame and two pivoting seats. The sitting unit is pivoted with the base unit. The rotation driving unit includes an operating rod disposed between the front side of the base unit and the sitting unit. The operating rod may be driven to generate a torque for driving the sitting unit to pivot relative to the base unit. The cushion unit may generate a reverse torque for cushioning the torque. By the configuration of the cushion unit, the present invention may cushion the impact from the sitting unit during pivoting and reduce the shaking and improve the sitting comfort during usage, and, by disposing the rotation driving unit at the front side of the base unit, it may preserve a space behind the base unit for receiving other components.

Description

Wheelchair chair frame

The present invention relates to a transportation tool specially suitable for patients or disabled people, especially a wheelchair.

A conventional wheelchair chair frame includes a base portion, a seating portion pivotally connected to the base portion, and a pneumatic rod. The air pressure rod is disposed between the rear side of the base portion and the seating portion, and can be driven to drive the seating portion to pivot relative to the base portion. Therefore, the user can operate the pneumatic lever from the rear end of the wheelchair and adjust the relative pivot angle between the seating part and the base part as needed.

However, when the pneumatic rod is used, the instantaneous impulse generated by the pneumatic rod will vibrate the seat and cause the entire chair frame to shake, which may easily frighten or make the rider feel uneasy. On the other hand, since the rear side of the base is usually used to accommodate the user's related accessories, and the pneumatic rod is disposed on the rear side of the base, the installation space of the accessories will be compressed, which hinders the accommodation of the accessories. The use of space is not conducive to adjusting the air pressure rod.

Therefore, it is an object of the present invention to provide a wheelchair seat frame device that can at least overcome the shortcomings of the prior art.

Therefore, the wheelchair chair frame of the present invention includes a base unit, a sitting unit, a driving unit, and a buffer unit.

The base unit includes a base frame and two pivot seats arranged on the base frame. The riding unit includes two pivot rods respectively pivoted to the pivot seats. The driving unit is disposed between the front side of the base unit and the riding unit, and includes an operating lever that can be driven to generate a moment that drives the riding unit to pivot relative to the base unit. The buffer unit is disposed between the base unit and the riding unit and includes at least one elastic element that can generate a reverse moment opposite to the moment and used for buffering.

The effect of the present invention is that through the arrangement of the buffer unit, the impulse generated when the riding unit is driven to pivot can be buffered and the shaking can be reduced, thereby improving the comfort of riding. Moreover, by arranging the driving unit on the base unit On the front side, the space on the rear side of the base unit for accommodating other components can be reserved to increase the accommodating space of the chair frame of the wheelchair.

Referring to Figures 1 and 2, one embodiment of the wheelchair chair frame of the present invention includes a base unit 1, a sitting unit 2, a driving unit 3, and a buffer unit 4.

The base unit 1 includes a base frame 11 and two pivot seats 12 . The chassis 11 has two front pole portions 111 extending forward and backward, two first rear bottom pole portions 112 extending rearward from the front pole portions 111, and two first rear bottom pole portions 112 respectively extending rearward from the front pole portions 111. The second rear bottom pole portion 113 extends and is located on the lower side of the first rear bottom pole portions 112 . The chassis 11 also has a first cross bar portion 114 connected between the first rear bottom bar portions 112, a second cross bar portion 115 connected between the second rear bottom bar portions 113, and a The third cross bar portion 116 is connected between the front bar portions 111 . A connecting portion 117 is provided between each first rear bottom pole portion 112 and the corresponding second rear bottom pole portion 113 below. The pivot seats 12 are respectively disposed on the left and right sides of the first cross bar portion 114 , and each pivot seat 12 is provided with a left and right pivot hole.

The seating unit 2 includes a seat frame group 21 , a seat back frame group 22 , and two pivot rods 23 . The chair seat frame group 21 has two frame rods 211 extending forward and backward, a cross rod 212 connected between the frame rods 211, and a seat plate group 213 fixed on the upper side of the frame rods 211. The seat back frame set 22 has a connecting portion 221 installed on the frame rods 211 and an extension portion 222 disposed above the connecting portion 221 . The pivot rods 23 are respectively installed on the inner sides of the rack rods 211 and are respectively pivoted to the pivot holes of the pivot seats 12 .

The driving unit 3 is disposed between the front side of the base unit 1 and the riding unit 2, and includes an operating lever 31, a first connecting component 32 disposed on the cross bar 212, and a third cross bar disposed on the third cross bar. The second connecting component 33 of the portion 116. The first connecting component 32 has two first plates 321 fixed on the cross bar 212 and a first latch 322 disposed between the first plates 321 . The first latch 322 is used for the operating lever 31 The upper end is pivoted. The second connecting component 33 has two second plates 331 fixed on the third crossbar portion 116 and two second plugs 332 respectively provided on the second plates 331 . The second plugs 332 The lower end of the operating lever 31 is pivoted. The upper end and the lower end of the operating lever 31 can pivot relative to the first latch 322 and the second latch 332 respectively.

Preferably, the operating rod 31 is a pneumatic rod or a hydraulic rod, and during the process of driving the operating rod 31, the first connecting component 32 can move relative to the second connecting component 33.

The buffer unit 4 is disposed between the base unit 1 and the riding unit 2 and includes two elastic elements 41 . Each elastic element 41 is installed between the corresponding pivot seat 12 and the corresponding pivot rod 23 .

Preferably, the installation positions of the elastic elements 41 are symmetrical with respect to the center of the riding unit 2, which can provide a more stable buffering effect for users whose body center of gravity is unbalanced, such as stroke patients and scoliosis patients. .

Preferably, each elastic element 41 is a torsion spring.

In this embodiment, the number of the elastic elements 41 is two, but in other embodiments, the number of the torsion springs may also be one or more than three.

Taking the operating rod 31 as a pneumatic rod and each elastic element 41 as a torsion spring as an example. Referring to Figures 3 and 4, the operating rod 31 can be driven to move its pneumatic cylinder upward and pass through the first connecting component. 32 pushes the cross bar 212 upward to generate a moment that drives the riding unit 2 to pivot relative to the base unit 1. The user can adjust the relative pivot angle between the riding unit 2 and the base unit 1 according to needs. At the same time, each torsion spring disposed between the corresponding pivot seat 12 and the corresponding pivot rod 23 can generate a reverse torque that acts in a direction opposite to the torque and is used for buffering. Therefore, when the driving unit 3 is operated, the unstable impulse generated by it can be immediately absorbed by the elastic elements 41, and the entire chair frame will not shake too much, allowing the user to have a more comfortable ride. Experience, for users whose body center of gravity is unbalanced, it can more effectively protect them from injury due to excessive vibration.

In summary, the wheelchair chair frame of the present invention, through the arrangement of the buffer unit 4, can buffer the impulse generated when the driving unit 3 is operated to pivot the riding unit 2 and reduce shaking, thereby improving the comfort of riding. Moreover, by arranging the drive unit 3 on the front side of the base unit 1, the space on the rear side of the base unit 1 for accommodating other components can be reserved to increase the storage space of the wheelchair frame, so it can be achieved purpose of the present invention.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of this invention.

1: Base unit 11: Bottom frame 111: Front stem 112: First rear sole part 113: Second rear sole part 114: First crossbar part 115: Second crossbar part 116:Third crossbar part 117:Connection Department 12: Pivot base 2: Ride unit 21: Chair seat frame set 211:Pole 212:Bar 213:Seat panel set 22: Chair back frame set 221: Interface Department 222:Extension 23: Pivot rod 3: Drive unit 31: Operating lever 32: First connection component 321:First plate 322:First latch 33: Second connection component 331:Second plate 332:Second latch 4: Buffer unit 41: Elastic element

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view of an embodiment of the wheelchair frame of the present invention; Figure 2 is an incomplete perspective view of this embodiment excluding the seat panel set; Figure 3 is a side cross-sectional view of the embodiment; and FIG. 4 is a side cross-sectional view of the embodiment, illustrating that a driving unit can be operated to drive a base unit to pivot.

1: Base unit

11: Bottom frame

111: Front stem

112: First rear sole part

113: Second rear sole part

115: Second crossbar part

116:Third crossbar part

117:Connection Department

2: Ride unit

21: Chair seat frame set

211:Pole

213:Seat panel set

22: Chair back frame set

221: Interface Department

222:Extension

3: Drive unit

31: Operating lever

33: Second connection component

331:Second plate

332:Second latch

Claims (10)

A wheelchair chair frame, including: A base unit includes a chassis and two pivot seats provided on the chassis; A riding unit includes two pivot rods respectively pivoted to the pivot seats; A driving unit is disposed between the front side of the base unit and the ride unit and includes an operating lever that can be driven to generate a moment that drives the ride unit to pivot relative to the base unit; and A buffer unit is disposed between the base unit and the riding unit and includes at least one elastic element that can generate a reverse moment opposite to the moment and used for buffering. The wheelchair chair frame as claimed in claim 1, wherein each elastic element is a torsion spring. The wheelchair chair frame according to claim 1, wherein the base frame has a first cross bar part, the pivot seats are arranged on the left and right sides of the first cross bar part, and the buffer unit includes two elastic Components, each elastic component is disposed between the corresponding pivot seat and the corresponding pivot rod. The wheelchair chair frame according to claim 1, wherein the operating lever is a pneumatic lever or a hydraulic lever. The wheelchair chair frame according to any one of claims 1 to 4, wherein the seating unit includes a chair seat frame set and a chair back frame set arranged on the chair seat frame set, and the chair seat frame set It has two racks extending forward and backward, a cross bar connected between the racks, and the pivot rods respectively installed on the inner sides of the racks and respectively pivotally connected to the pivot seats. The wheelchair chair frame according to claim 5, wherein the chair seat frame set also has a seat plate set arranged on the frame rods. The wheelchair chair frame according to claim 6, wherein the drive unit further includes a first connecting component, and the upper side of the operating lever is arranged on the cross bar through the first connecting component, and the operating lever can be driven. The first connecting component drives the chair seat frame group to pivot with the pivot rods as fulcrums. The wheelchair chair frame according to claim 7, wherein the bottom frame of the base unit has two front rod portions extending forward and backward, and two first rear bottom rod portions respectively extending rearwardly from the front rod portions. , two second rear bottom pole portions respectively extending rearward from the front pole portions and located below the first rear bottom pole portions, and the first cross bar connected between the first rear bottom pole portions part, a second cross bar part connected between the second rear bottom bar parts, and a third cross bar part connected between the front bar parts, the lower side of the operating lever passes through a second connecting component provided on the third crossbar portion. The wheelchair chair frame according to claim 8, wherein the first connecting component has two first plates fixed on the cross bar and a first latch disposed between the first plates, and the The first latch is for the upper end of the operating lever to be pivoted. The second connecting component has two second plates fixed on the third cross bar part and two second plates respectively provided on the second plates. Latch, the second latch is provided for the lower end of the operating lever to be pivoted. The wheelchair chair frame according to claim 9, wherein the bottom frame of the base unit also has two connecting parts extending up and down, each connecting part is provided between the corresponding first rear bottom rod part and the corresponding between the second rear bottom pole.

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