CN116831832A

CN116831832A - Frame of wheelchair

Info

Publication number: CN116831832A
Application number: CN202211105754.4A
Authority: CN
Inventors: 欧俞亨; 杨矅隆
Original assignee: Karma Medical Products Co Ltd
Current assignee: Karma Medical Products Co Ltd
Priority date: 2022-03-25
Filing date: 2022-09-09
Publication date: 2023-10-03
Also published as: TWI804252B; EP4248929A1; TW202337418A

Abstract

A chair frame of a wheelchair comprises a base unit, a riding unit, a driving unit and a buffer unit. The base unit comprises a chassis and two pivot seats. The sitting unit is pivoted to the base unit. The driving unit comprises an operating rod arranged between the front side of the base unit and the riding unit. The operating lever can be driven to generate a moment for driving the riding unit to pivot relative to the base unit. The damping unit may generate a counter moment for damping the moment. Through the setting of buffer unit, can buffer the drive the impulsive force that produces when taking the unit pivot pendulum reduces and rocks, promotes the comfort of taking the use to through will drive the unit setting is in base unit front side, can remain the base unit rear side is used for holding the space of other components.

Description

Frame of wheelchair

Technical Field

The invention relates to a transport means specially suitable for patients or disabled persons, in particular to a wheelchair.

Background

An existing wheelchair frame comprises a base portion, a seat portion pivotally connected to the base portion, and an air pressure lever. The pneumatic rod is arranged between the rear side of the base part and the riding part and can be driven to drive the riding part to pivot relative to the base part. Therefore, a user can operate the pneumatic rod from the rear end of the wheelchair and adjust the relative pivot angle between the sitting portion and the base portion according to the requirement.

However, when the pneumatic rod is used, the impact generated instantaneously shakes the sitting portion and the seat frame is shaken as a whole, so that the sitting person is easily frightened or uneasy. On the other hand, since the rear side of the base part is generally used for accommodating the related fitting of the user, and the air pressure lever is disposed at the rear side of the base part, the installation space of the fitting is compressed, which hinders the utilization of the accommodating space and is disadvantageous for adjusting the air pressure lever.

Disclosure of Invention

The aim of the present invention is to provide a frame device for a wheelchair that overcomes at least the drawbacks of the background art.

The invention relates to a chair frame of a wheelchair, which comprises a base unit, a riding unit, a driving unit and a buffer unit. The base unit comprises a bottom frame and two pivoting seats arranged on the bottom frame. The riding unit comprises two pivoting rods which are respectively pivoted with the pivoting seats. The driving unit is arranged between the front side of the base unit and the riding unit and comprises an operating rod. The operating lever can be driven to generate a moment for driving the riding unit to pivot relative to the base unit. The damping unit is arranged between the base unit and the riding unit and comprises at least one elastic element which can generate a reverse moment which is opposite to the moment and is used for damping.

In the chair frame of the wheelchair, each elastic element is a torsion spring.

The chassis is provided with a first cross rod part, the pivot seats are arranged on the left side and the right side of the first cross rod part, the buffer unit comprises two elastic elements, and each elastic element is arranged between the corresponding pivot seat and the corresponding pivot rod.

The operating rod is a pneumatic rod or a hydraulic rod.

The invention relates to a chair frame of a wheelchair, which comprises a chair seat frame group and a chair back frame group arranged on the chair seat frame group, wherein the chair seat frame group is provided with two hack levers extending forwards and backwards and cross bars connected between the hack levers, and the pivoting bars are respectively arranged on the inner sides of the hack levers and are respectively pivoted to the pivoting seats.

The chair frame of the wheelchair is characterized in that the chair seat frame group is also provided with a seat plate group arranged on the frame rod.

The driving unit further comprises a first connecting component, the upper side of the operating rod is arranged on the cross rod through the first connecting component, and the operating rod can be driven to drive the chair seat frame group to pivot by taking the pivot rod as a pivot through the first connecting component.

The chassis of the base unit of the wheelchair of the invention is provided with two front rod parts extending forwards and backwards, two first rear bottom rod parts extending backwards from the front rod parts respectively, two second rear bottom rod parts extending backwards from the front rod parts respectively and positioned below the first rear bottom rod parts, a second cross rod part connected between the second rear bottom rod parts, and a third cross rod part connected between the front rod parts, wherein the lower side of the operating rod is arranged on the third cross rod part through a second connecting component.

The first linking component is provided with two first plates fixedly arranged on the cross rod and first bolts arranged between the first plates, the first bolts are used for being pivoted at the upper end part of the operating rod, the second linking component is provided with two second plates fixedly arranged on the third cross rod part and two second bolts respectively arranged on the second plates, and the second bolts are used for being pivoted at the lower end part of the operating rod.

In the chair frame of the wheelchair, the underframe of the base unit is also provided with two connecting parts which extend up and down, and each connecting part is arranged between the corresponding first rear bottom rod part and the corresponding second rear bottom rod part.

The invention has the beneficial effects that: through the setting of buffer unit, can buffer the drive the impulsive force that produces when taking the unit pivot pendulum reduces and rocks, promotes the comfort of taking the use, and, through will drive the unit setting is in base unit front side can remain the base unit rear side is used for the space of holding other components, in order to increase the accommodation space of the chair frame of wheelchair.

Drawings

Other features and advantages of the invention will be apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of one embodiment of a frame of the wheelchair of the present invention;

FIG. 2 is a fragmentary perspective view of the embodiment not including a seat pan set;

FIG. 3 is a side cross-sectional view of the embodiment;

FIG. 4 is a side cross-sectional view of the embodiment illustrating a drive unit operable to pivot a seating unit relative to a base unit.

Detailed Description

Referring to fig. 1 and 2, an embodiment of a frame of a wheelchair according to the present invention includes a base unit 1, a seating unit 2, a driving unit 3, and a buffer unit 4.

The base unit 1 comprises a chassis 11 and two pivoting seats 12. The chassis 11 has two front pole portions 111 extending forward and backward, two first rear bottom pole portions 112 extending backward from the front pole portions 111, respectively, and two second rear bottom pole portions 113 extending backward from the front pole portions 111 and located below the first rear bottom pole portions 112, respectively. The chassis 11 also has a first rail 114 coupled between the first rear bottom stems 112, a second rail 115 coupled between the second rear bottom stems 113, and a third rail 116 coupled between the front stems 111. A connecting portion 117 extending up and down is connected between each first rear bottom rod portion 112 and the second rear bottom rod portion 113 corresponding to the lower portion. The pivot seats 12 are respectively disposed on the left and right sides of the first cross bar 114, and each pivot seat 12 is provided with a pivot hole that penetrates from left to right.

The seating unit 2 includes a seat frame set 21, a back frame set 22, and two pivoting levers 23. The seat frame set 21 has two frame bars 211 extending back and forth, a cross bar 212 connected between the frame bars 211, and a seat plate set 213 fixedly installed on the upper side of the frame bars 211. The seat back frame group 22 has an engagement portion 221 mounted to the frame bar 211, and an extension portion 222 disposed above the engagement portion 221. The pivoting bars 23 are respectively installed at the inner sides of the frame bars 211 and are respectively pivoted to the pivoting holes of the pivoting seats 12.

The rotation driving unit 3 is disposed between the front side of the base unit 1 and the riding unit 2, and includes an operation lever 31, a first engagement assembly 32 disposed on the cross bar 212, and a second engagement assembly 33 disposed on the third cross bar 116. The first connecting assembly 32 has two first plates 321 fixed to the cross bar 212 and a first pin 322 disposed between the first plates 321. The first latch 322 is provided for pivoting an upper end portion of the operating lever 31. The second connecting assembly 33 has two second plates 331 fixed to the third cross bar 116 and two second pins 332 respectively disposed on the second plates 331. The second latch 332 is pivoted to the lower end of the operating lever 31. The upper end and the lower end of the operating lever 31 are pivotable 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 the first engagement member 32 is movable relative to the second engagement member 33 during driving of the operating rod 31.

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

Preferably, the elastic member 41 is installed at a position symmetrical to the center of the seating unit 2, so that the cushioning effect can be more stably exerted for the user having unbalanced body gravity, such as a stroke patient and a scoliosis patient.

Preferably, each elastic element 41 is a torsion spring.

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

Taking the operation rod 31 as a pneumatic rod and each elastic element 41 as a torsion spring as an example, referring to fig. 3 and 4, the operation rod 31 may be driven to move up a rod body in the pneumatic cylinder, and the first connecting component 32 pushes the cross rod 212 upward to drive the seat frame set 21 to pivot with the pivot rod 23 as a pivot point, so as to generate a moment to drive the seat unit 2 to pivot with respect to the base unit 1, and a user may adjust a relative pivot angle between the seat unit 2 and the base unit 1 according to a requirement. At the same time, each torsion spring arranged between the corresponding pivot seat 12 and the corresponding pivot rod 23 can generate a reverse moment with an action direction opposite to the moment and used for buffering. Therefore, during the operation of the rotation driving unit 3, the generated unstable impact force can be absorbed by the elastic element 41 in real time, the whole chair frame does not shake too much, the user can have more comfortable riding experience, and the user with unbalanced body gravity center can be more effectively protected from injury caused by excessive vibration.

In summary, the chair frame of the wheelchair according to the present invention can buffer the impact generated when the driving unit 3 is operated to pivot the riding unit 2 and reduce the shaking by the arrangement of the buffer unit 4, thereby improving the riding comfort, and the space for accommodating other components at the rear side of the base unit 1 can be reserved by arranging the driving unit 3 at the front side of the base unit 1, so as to increase the accommodating space of the chair frame of the wheelchair, thereby achieving the purpose of the present invention.

The foregoing is merely illustrative of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. A chair frame of a wheelchair, characterized in that: comprising:

the base unit comprises a chassis and two pivoting seats arranged on the chassis;

the riding unit comprises two pivoting rods which are respectively pivoted with the pivoting seats;

the driving unit is arranged between the front side of the base unit and the riding unit and comprises an operating rod which can be driven to generate a moment for driving the riding unit to pivot relative to the base unit; a kind of electronic device with high-pressure air-conditioning system

And the buffer unit is arranged between the base unit and the riding unit and comprises at least one elastic element, and the at least one elastic element can generate a reverse moment which is opposite to the moment and is used for buffering.

2. The frame of a wheelchair of claim 1, wherein: each elastic element is a torsion spring.

3. The frame of a wheelchair of claim 1, wherein: the chassis is provided with a first cross rod part, the pivot seat is arranged at the left side and the right side of the first cross rod part, the buffer unit comprises two elastic elements, and each elastic element is arranged between the corresponding pivot seat and the corresponding pivot rod.

4. The frame of a wheelchair of claim 1, wherein: the operating rod is a pneumatic rod or a hydraulic rod.

5. The frame of a wheelchair according to any one of claims 1 to 4, wherein: the sitting unit further comprises a chair seat frame group and a chair back frame group arranged on the chair seat frame group, the chair seat frame group is provided with two hack levers extending front and back and a cross rod connected between the hack levers, and the pivoting levers are respectively arranged on the inner sides of the hack levers and are respectively pivoted to the pivoting seats.

6. The frame of a wheelchair of claim 5, wherein: the seat frame group is also provided with a seat plate group arranged on the hack lever.

7. The frame of a wheelchair of claim 6, wherein: the driving unit further comprises a first connecting component, the upper side of the operating rod is arranged on the cross rod through the first connecting component, and the operating rod can be driven to drive the chair seat frame set to pivot by taking the pivot rod as a pivot through the first connecting component.

8. The frame of a wheelchair of claim 7, wherein: the chassis of the base unit is provided with two front rod parts extending forwards and backwards, two first rear bottom rod parts extending backwards from the front rod parts respectively, two second rear bottom rod parts extending backwards from the front rod parts respectively and positioned at the lower sides of the first rear bottom rod parts, second cross rod parts connected between the second rear bottom rod parts, and third cross rod parts connected between the front rod parts, and the lower sides of the operating rods are arranged at the third cross rod parts through second connecting components.

9. The frame of a wheelchair of claim 8, wherein: the first linking component is provided with two first plates fixedly arranged on the cross rod and first bolts arranged between the first plates, the first bolts are used for being pivoted at the upper end part of the operating rod, the second linking component is provided with two second plates fixedly arranged on the third cross rod part and two second bolts respectively arranged on the second plates, and the second bolts are used for being pivoted at the lower end part of the operating rod.

10. The frame of a wheelchair of claim 9, wherein: the chassis of the base unit further has two connecting portions extending up and down, each connecting portion being disposed between the corresponding first rear bottom bar portion and the corresponding second rear bottom bar portion.