CN2734195Y

CN2734195Y - Lifting mechanism of wheelchair pedal

Info

Publication number: CN2734195Y
Application number: CN 200420092166
Authority: CN
Inventors: 许庆禄
Original assignee: LLOYD INDEN Inc
Current assignee: Medical Teng Polytron Technologies Inc
Priority date: 2004-08-23
Filing date: 2004-08-23
Publication date: 2005-10-19
Anticipated expiration: 2014-08-23

Abstract

The utility model mainly relates to the lifting mechanism of a wheelchair pedal, which is symmetrically arranged on the right and the left side of the main body of a wheelchair. The lifting mechanism of the wheelchair pedal on each side consists of a cushion connecting rod arranged on one side of the main body of the wheelchair and an outer tube. A driving gear is arranged on one end of the cushion connecting rod and is contained and positioned at one end of the outer tube. An inner tube is sheathed in the outer tube while one end of the inner tube is provided with a driven gear which is engaged with the driving gear. A helical flute is arranged on the lateral wall of the inner tube and a lifter is sheathed outside the inner tube and arranged in the outer tube. Foot-plates are arranged on the lower end of the lifter which can lift and go down by the matching of the driving group and the helical flute. By the utility model, the foot-plates of the sitting upright wheelchair can automatically lift and go down along the different using ways of the wheelchair, which ensures the security for invalid who uses the wheelchair.

Description

Wheelchair pedal lifting structure

Technical field

This utility model relates to a kind of wheelchair pedal lifting structure, and particularly about a kind of sitting formula wheelchair that applies to, the support tube of its pedal is to be an elevating lever, and it is can move down to support when wheelchair erects, to reach the firm purpose of wheelchair.

Background technology

Press, wheelchair is indispensable to the invalid and a kind of important rehabilitation aid that taken care of oneself, though many crippleds have lost walking function, but owing to by the wheelchair life of being taken care of oneself, even can be competent at suitable work, and the invalid except with wheelchair as the instrument of riding instead of walk, can also see through wheelchair takes exercises, with the coordination pass that strengthens cerebral cortex and muscle contraction be, improving cardiovascular is the function of system, reduce the generation of other complication, improve their enjoyment and confidence to life, yet selecting a suitable wheelchair is that very important, suitable wheelchair not only can allow disabled user comfortable to the crippled, also can allow simultaneously stable being sitting on the seat avoiding of disabled user slide or the danger of falling.

Sitting formula wheelchair is for can be used as the dual-purpose wheelchair of sitting posture wheelchair and vertical wheelchair, yet generally the pedal of this that commonly use kind of wheelchair is to move lift adjustment with the difference of occupation mode certainly, so will cause the danger on using, promptly to convert into when vertical from sitting posture when disabled user, the position of its pedal is because of doing the adjustment of automatic lifting, the position that is pedal just maintains unsettled, so when invalid one station get on pedal be easy to because of the liftoff plate of pedal too high, cause the wheelchair crank to turn forward and the invalid is fallen, cause danger easily.

Therefore, how a kind of wheelchair pedal lifting structure to be proposed at the problems referred to above, the pedal that not only can improve sitting formula wheelchair can't move the shortcoming of lift adjustment certainly because of the conversion of occupation mode, can improve the safety of invalid on using, makes and can solve the above problems.

The utility model content

The purpose of this utility model provides a kind of wheelchair pedal lifting structure, and it is to make the pedal of sitting formula wheelchair can be according to the difference of occupation mode, and moves lift adjustment certainly, to reach the safety in the use and the purpose of convenience.

For reaching the above object, solution of the present utility model is: a kind of wheelchair pedal lifting structure, it is the left and right sides that is symmetrically set in a wheelchair main body, the wheelchair pedal lifting structure of each side is to include: a driving gear, and it is a medicated cushion connecting rod one end that is installed in this wheelchair main body one side; One trocar sheath, it is to be located at this wheelchair main body one side, an end lateral wall of this trocar sheath is to be provided with a fixing hole, is fixed in this trocar sheath for this driving gear; One inner sleeve, it is to be sheathed in this trocar sheath, and an end of this inner sleeve is to be provided with a driven gear, and this driven gear is to be meshed with this driving gear, is to be provided with helicla flute on the lateral wall of this inner sleeve, is to be provided with steel ball in this helicla flute; And an elevating lever, it is to be sheathed on this inner sleeve to be positioned at this trocar sheath outward, and this elevating lever is to be provided with a connecting rod, and the other end of this connecting rod is to be connected with this elevating lever of the wheelchair pedal lifting structure of being located at this wheelchair main body opposite side.

This driving gear and this driven gear are to be helical gear.

The bottom of this elevating lever is to be provided with pedal.

This medicated cushion connecting rod is to be provided with a locating shaft in this driving gear place, is positioned the set locating hole of this trocar sheath to wear, so that this driving gear is positioned in this trocar sheath.

The lateral wall of this inner sleeve is to be provided with an annular groove in this driven gear below, and this annular groove is to be provided with two keepers, and the both sides, lateral wall of this trocar sheath are to be respectively equipped with a screw with respect to the position of two these keepers, lock packing for a screw and fix this inner sleeve.

After adopting such scheme, it is by the driving gear of medicated cushion connecting rod and cooperating of driven gear for this utility model, rotate and drive inner sleeve, force by inner sleeve rotation and to be positioned at the restriction that upper connecting rod was moved and added in the rotation of spiral fluted transmission group member steel ball, the elevating lever that makes with make lifting moving, perhaps when inner sleeve rotates, force elevating lever with cooperating of trundle and make lifting moving by another transmission group member chute, make the pedal that is installed in elevating lever and lower end can do the lifting location by project organization like this, be that pedal can be according to the occupation mode difference of sitting formula wheelchair, and move the adjustment of lifting location certainly, the pedal of the sitting formula wheelchair of commonly using with solution can't be done from moving the localized shortcoming of lifting with the difference of occupation mode, with guarantee user on manipulating safety and improve the convenience of using.

Now for making your juror further understanding and understanding more be arranged to architectural feature of the present utility model and the effect reached, sincerely help with preferred embodiment figure and cooperate detailed explanation, illustrate as afterwards:

Description of drawings

Fig. 1 is that this utility model one preferred embodiment applies to sitting formula wheelchair in sitting attitude enforcement state diagram;

Fig. 2 is the combination sketch map of this utility model one preferred embodiment;

Fig. 3 is the decomposing schematic representation of this utility model one preferred embodiment;

Fig. 4 is the cross-sectional schematic of this utility model one preferred embodiment;

Fig. 5 is that this utility model one preferred embodiment applies to sitting formula wheelchair in upright attitude enforcement state diagram;

Fig. 6 is the action sketch map of this utility model one preferred embodiment;

Fig. 7 is this utility model one combination sketch map of preferred embodiment in addition;

Fig. 8 is the decomposing schematic representation of another preferred embodiment of this utility model;

Fig. 9 is the action sketch map of another preferred embodiment of this utility model.

10 wheelchair main bodys, 12 driving gears, 14 medicated cushion connecting rods

16 locating shafts, 20 trocar sheaths, 22 fixing holes

24 locating holes, 26 screws, 28 screws

29 chutes, 30 inner sleeves, 32 driven gears

34 helicla flutes, 36 steel balls, 37 annular grooves

38 keepers, 40 elevating levers, 42 pedals

44 connecting rods, 46 elevating levers, 48 trundles

The specific embodiment

See also Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this utility model is the left and right sides that is symmetrically set in sitting formula wheelchair main body 10 respectively, each side is to include a driving gear 12, driving gear 12 is ends that are installed in the medicated cushion connecting rod 14 of sitting formula wheelchair main body 10 1 sides, medicated cushion connecting rod 14 is to be provided with a locating shaft 16 on the axis of driving gear 12, driving gear 12 is to be arranged in the set fixing hole 22 in a trocar sheath 20 1 end lateral walls, and wear the set locating hole 24 of trocar sheath 20 by locating shaft 16, and the medicated cushion connecting rod 14 that makes combines with trocar sheath 20, and driving gear 12 is positioned in the trocar sheath 20, trocar sheath 20 is that installing is fixed on the wheelchair main body 10, is to be arranged with an inner sleeve 30 in the trocar sheath 20.

One end of inner sleeve 30 is that a driven gear 32 is arranged, driven gear 32 be with driving gear 12 nibble mutually and, driving gear 12 is all helical gear with driven gear 32, the lateral wall of inner sleeve 30 is to be provided with helicla flute 34, be to be provided with steel ball 36 in the helicla flute 34, the lateral wall of inner sleeve 30 is to be provided with an annular groove 37 for sheathed two keepers 38 in the below of driven gear 32, and trocar sheath 20 both sides are respectively to be provided with a screw 26 with respect to the position of keeper 38, and lock fixedly inner sleeve 30 of packing keeper 38 by screw 28, the outside of inner sleeve 30 is arranged with an elevating lever 40 in addition, elevating lever 40 is to be positioned at trocar sheath 20, the bottom of elevating lever 40 is to be provided with a pedal 42 to use for the patient, elevating lever 40 is to be connected with a connecting rod 44 in addition, and the other end of connecting rod 44 is the elevating levers 46 that are connected at wheelchair main body 10 opposite sides.

See also Fig. 5 and Fig. 6, when user with sitting formula wheelchair when the sitting posture of Fig. 1 is converted into Fig. 5 vertical, to rotate up and drive medicated cushion connecting rod 14, shown in the figure upward arrow, make driving gear 12 rotation and drive driven gear 32 inner sleeve 30 is turned clockwise, when turning clockwise, inner sleeve 30 will force this moment steel ball 36 rotations that are positioned at helicla flute 34 to move down, and the elevating lever 40 of both sides and 46 is because of being connected with connecting rod 44, the elevating lever 40 that makes and 46 can't rotate and only can move down, shown in the figure upward arrow, so pedal 42 can be lowered into the appropriate location, as user with sitting formula wheelchair from vertical when converting into sitting posture, to be rotated down medicated cushion connecting rod 14 drive driven gears 32 is rotated counterclockwise, and make

elevating lever

40 and 46 be moved upward to the appropriate location, by lifting structure of the present utility model is to make the difference of sitting formula wheelchair according to occupation mode, and allows pedal 42 from moving lift adjustment, to improve safety and the convenience on using; This utility model mainly is the transmission group collocation helicla flute 34 that is constituted by steel ball 36 and connecting rod 44 from the above, so that two

elevating levers

40 and 46 can move lift adjustment certainly according to the different of sitting formula wheelchair occupation mode, yet this transmission group also can be replaced by other different assemblies, as described in next embodiment.

See also Fig. 7 and Fig. 8, this embodiment utilizes different assemblies to constitute above-mentioned transmission group, the transmission group of this embodiment is to include a chute 29 of being located on trocar sheath 20 lateral walls, and be provided with a trundle 48 in the upper end of elevating lever 40, trundle 42 is that all the other members all are same as an embodiment in the chute 29 that is arranged in the helicla flute 34 of inner sleeve 30 with trocar sheath 20.

See also Fig. 9, when the user desire is converted into sitting formula wheelchair when vertical from sitting posture, this embodiment start is shown in the figure upward arrow, when medicated cushion connecting rod 14 is rotated down, to make driving gear 12 rotation and drive driven gear 32 inner sleeve 30 is rotated counterclockwise, when being rotated counterclockwise, inner sleeve 30 will force the trundle 48 that is positioned at helicla flute 34 to move up, and because of trundle 48 also is positioned at chute 29, and force elevating lever 40 only can move up and can't rotate, shown in the figure upward arrow, so pedal 44 can be stretched to the appropriate location, as user sitting formula wheelchair is converted into when vertical from sitting posture, to rotate up medicated cushion connecting rod 14 drive driven gears 32 and turn clockwise, and make elevating lever 40 be moved downward to the appropriate location.

In sum, this utility model wheelchair pedal lifting structure, it is by the driving gear 12 of medicated cushion connecting rod 14 and cooperating of driven gear 32, rotate and drive inner sleeve 30, force transmission group member steel ball 36 rotations that are positioned at helicla flute 34 to move and add the restriction of upper connecting rod 44 by inner sleeve 30 rotations, the

elevating lever

40 and 46 that makes is made lifting moving, perhaps when inner sleeve 30 rotations, force

elevating lever

40 and 46 to make lifting moving with cooperating of trundle 48 by another transmission group member chute 29, make the pedal 42 that is installed in

elevating lever

40 and 46 lower ends can do the lifting location by project organization like this, be that pedal 42 can be according to the occupation mode difference of sitting formula wheelchair, and move the adjustment of lifting location certainly, the pedal of the sitting formula wheelchair of commonly using with solution can't be done from moving the localized shortcoming of lifting with the difference of occupation mode, with guarantee user on manipulating safety and improve the convenience of using.

So this utility model is one to have novelty, progressive and can should meet China's Patent Law patent application important document undoubtedly for user on the industry in fact, the whence proposes utility application in accordance with the law, pray an ancient unit of weight office and grant early to quasi patent, to sense for praying.

The above person of thought, it only is this utility model one preferred embodiment, be not to be used for limiting the scope that this utility model is implemented, so the equalization of doing according to the described shape of this utility model claim, structure, feature and spirit changes and modifies such as, all should be included in the claim of the present utility model.

Claims

1, a kind of wheelchair pedal lifting structure, it is characterized in that: it is the left and right sides that is symmetrically set in a wheelchair main body, the wheelchair pedal lifting structure of each side is to include:

One driving gear, it is a medicated cushion connecting rod one end that is installed in this wheelchair main body one side;

One trocar sheath, it is to be located at this wheelchair main body one side, an end lateral wall of this trocar sheath is to be provided with a fixing hole, is fixed in this trocar sheath for this driving gear;

One inner sleeve, it is to be sheathed in this trocar sheath, and an end of this inner sleeve is to be provided with a driven gear, and this driven gear is to be meshed with this driving gear, is to be provided with helicla flute on the lateral wall of this inner sleeve, is to be provided with steel ball in this helicla flute;

One elevating lever, it is to be sheathed on this inner sleeve to be positioned at this trocar sheath outward, and this elevating lever is to be provided with a connecting rod, and the other end of this connecting rod is to be connected with this elevating lever of the wheelchair pedal lifting structure of being located at this wheelchair main body opposite side.

2, wheelchair pedal lifting structure as claimed in claim 1, it is characterized in that: this driving gear and this driven gear are to be helical gear.

3, wheelchair pedal lifting structure as claimed in claim 1, it is characterized in that: the bottom of this elevating lever is to be provided with pedal.

4, wheelchair pedal lifting structure as claimed in claim 1 is characterized in that: this medicated cushion connecting rod is to be provided with a locating shaft in this driving gear place, is positioned the set locating hole of this trocar sheath to wear, so that this driving gear is positioned in this trocar sheath.

5, wheelchair pedal lifting structure as claimed in claim 1, it is characterized in that: the lateral wall of this inner sleeve is to be provided with an annular groove in this driven gear below, this annular groove is to be provided with two keepers, the both sides, lateral wall of this trocar sheath are to be respectively equipped with a screw with respect to the position of two these keepers, lock packing for a screw and fix this inner sleeve.