CN204033637U - Chair set - Google Patents

Abstract

A chair includes a seating mechanism. The seating mechanism includes a seat unit and a back unit. The chair back unit is provided with a backrest piece and two backrest rods which can fold and unfold the backrest piece. The dorsal bar has a first bar portion, a second bar portion, and a third bar portion connected between the first bar portion and the second bar portion. The first rod part is provided with a top end and a bottom end which is positioned below and is connected with the third rod part in a forward protruding mode. By the innovative structure of the bending of the back side lever, particularly the design in which the bottom end of the first lever portion protrudes forward, the contact area of the backrest with the back of the user can be increased to effectively provide support, and the burden on the back of the user can be reduced.

Description

Chair tool

Technical field

This utility model relates to a kind of chair tool, particularly relates to a kind of chair tool for seating.

Background technology

General chair tool often because of for the difference of demand function, and have dissimilar design, such as chaise longue, office chair, wheelchair etc.Wherein, " wheelchair " is a kind of chair tool of riding instead of walk for the old and the weak individuals with disabilities, usually comprise a vehicle frame that can fold, several being installed in rotation on respectively on this vehicle frame and make the moveable wheel of this vehicle frame, and one to be arranged on this vehicle frame and the chair frame launching to fold along with this vehicle frame.This chair frame has a buttocks for user and leg sits the chair portion of putting, and one is installed on this rear, chair frame portion and supplies the back of the back setting of user.During use, allow handicapped user be sitting in this chair frame, and drive wheel to move by the both hands of user, or other people this vehicle frame of auxiliary pushing and be with motor car wheel to move, thus reach the object of auxiliary action.

Because user is except sleep, most time is all spend on wheelchair, again because the back of general chair frame is generally one piece of upright block or cloth, therefore the back curve of one of this back user of cannot fitting completely accordingly for the face that leans against abutting against the back supporting user, not namely back not good by holding support effect of general wheelchair, often cause the back of user uncomfortable after long-time use, even produce the deformity of spinal column, thus harmful user is healthy.In addition, it is also not good that other the chair tool such as chaise longue, office chair supports the effect at user back, equally easily allows user produce uncomfortable phenomenon after long-term use.

Summary of the invention

The purpose of this utility model is that providing a kind of effectively can increase the contact area at user back and then promote the chair tool of support effect.

This utility model chair tool, comprises one and takes mechanism, and this is taken mechanism and comprises a chair unit, and a chair back unit being arranged at this chair unit rear.This chair back unit has one and leans against part, and two are installed on this left and right sides leaning against part and the dorsal part bar making this lean against part can to open to folding respectively, each dorsal part bar all has a first bar portion extended along first central axis, one extends and the second bar portion be positioned at below this first bar portion along second central axis, and a 3rd bar portion be connected between this first bar portion and this second bar portion, each second bar portion has one and is combined with this chair unit the binding end installed, each first bar portion has the top that is positioned at top, and one is positioned at below and connects forward the bottom in the 3rd bar portion highlightedly, the top in the first bar portion of each dorsal part bar along this second central axis to the length of the binding end in this second bar portion be 400 ~ 530mm, the bottom in the first bar portion of each dorsal part bar along this second central axis to the length of the binding end in this second bar portion be 180 ~ 300mm, the center of the bottom in each the first bar portion is 18 ~ 30mm to the length of this second central axis.

Chair tool described in the utility model, the angle of this first central axis and this second central axis is 0 ~ 15 degree.

Chair tool described in the utility model, this leans against part has one and leans against face, this leans against mask that first facial between described first bar portion is supportted in an exhibition, the second face between described second bar portion is supportted in exhibition, and the 3rd face between described 3rd bar portion is supportted in exhibition.

Chair tool described in the utility model, this chair unit has a seating part, and this seating part has a seating surface, and this seating surface has this chair back unit of a vicinity and puts buttocks face to lower recess.

Chair tool described in the utility model, this seating surface also have one be connected to this put buttocks face in contrast to this chair back unit side and turn forward extend put lower limb face, this put lower limb face with a horizontal angle be 3 ~ 8 degree.

Chair tool described in the utility model, this seating surface also has two and is connected to this and puts buttocks face in contrast to the side of this chair back unit and put lower limb face to lower recess, this put the recessed innermost degree of depth of buttocks face be greater than described in put the recessed innermost degree of depth of lower limb face.

Chair tool described in the utility model, this chair unit also have two be arranged at the left and right sides of this seating part respectively sit side lever.

Chair tool described in the utility model, this seating part is formed by a sheet material and can be arranged at starting describedly to sit between side lever, and one end of this seating part is articulated in one of them and sits another end-rack of this seating part on side lever and be against another and sit on side lever.

Chair tool described in the utility model, this seating part is formed by the sheet material of several mutual pivot joint and can be arranged to folding describedly to sit between side lever, and the end opposite of this seating part is articulated in described seat on side lever respectively.

Chair tool described in the utility model, this seating part is made by flexible material, and this chair unit also has two left and right sides and this seating part can be opened to folding sit side lever being installed on this seating part respectively.

Chair tool described in the utility model, this seating part is made by flexible material, and this chair unit also has two left and right sides and make this seating part open to folding sit side lever being installed on this seating part respectively, each is sat side lever and all has one to the rear rod portion should putting buttocks face, and one connects this rear rod portion and to the front bar portion should putting lower limb face.

Chair tool described in the utility model, each rear rod portion of sitting side lever is all in curved arc shape, and each is sat side lever and all has a first curved arc section, and a second curved arc section be connected between this first curved arc section and this front bar portion.

Chair tool described in the utility model, this chair tool also comprises one and takes mechanism with this and be combined and install and make this take moveable travel mechanism of mechanism, and this travel mechanism comprises and is severally rotatably installed on this and takes wheel in mechanism.

The beneficial effects of the utility model are: by the innovation appearance of described dorsal part rod bending and the structure of hommization, the particularly design given prominence to forward of the bottom in the first bar portion of described dorsal part bar, the contact area that this leans against the back of part and user can be increased, make this lean against back that part can support user effectively, reducing the back burden of user, making this chair tool quite comfortable comfortable when taking.

Accompanying drawing explanation

Fig. 1 is a schematic perspective view of first embodiment of this utility model chair tool;

Fig. 2 is a schematic perspective view, shows separately a chair unit of this first embodiment, a chair back unit and a handle unit;

Fig. 3 is a schematic side view of Fig. 2;

Fig. 4 is a partial enlarged drawing of Fig. 3;

Fig. 5 is a schematic perspective view of second embodiment of this utility model chair tool, shows separately a chair unit of this second embodiment, a chair back unit and a handle unit;

Fig. 6 is a front-view schematic diagram of this chair unit;

Fig. 7 is a diagrammatic side-view cross-sectional schematic diagram of this chair unit;

Fig. 8 is a schematic perspective view of the 3rd embodiment of this utility model chair tool, shows separately a chair unit of the 3rd embodiment, a chair back unit and a handle unit;

Fig. 9 is a using state front view, and the state folding with launch of this chair unit is described separately;

Figure 10 is the side view cutaway drawing that X-X line is got in Fig. 9.

Detailed description of the invention

Be described in detail to this utility model below in conjunction with drawings and Examples, it should be noted that in the following description content, similar element represents with identical numbering.

Consult Fig. 1,2, first embodiment of this utility model chair tool can for taking with auxiliary action, and comprise: one to take for user and can fold take mechanism 1, and one is taken mechanism 1 with this and is combined and installs and make this take movably travel mechanism 7 of mechanism 1.It should be noted that, the chair tool of the present embodiment is the form of wheelchair, but on the implementation, this chair tool 1 is not to comprise this travel mechanism 7 for necessary, and therefore this chair tool also can be the chair such as chaise longue, office chair tool, and is not limited to the form disclosed in the present embodiment.

The mechanism 1 of taking of the present embodiment comprises a chair back unit 2, that can support the back of user and is arranged at this chair back unit 2 front lower place and the chair unit 3, of the leg and buttocks that can support user is arranged at handle unit 4, the armrest unit 5 be arranged at above this chair unit 3 on this chair back unit 2, and a pedal unit 6 be arranged at below this chair unit 3.

Consult Fig. 2,3,4, the chair back unit 2 of the present embodiment has one and leans against part 21, and two are installed on this left and right sides leaning against part 21 and the dorsal part bar 22 making this lean against part 21 can to open to folding respectively.

Each dorsal part bar 22 all has 221, one, a first bar portion extended along first central axis 81 and extends along second central axis 82 and be positioned at the second bar portion 222 below this first bar portion 221, and a 3rd bar portion 223 be connected to point-blank between this first bar portion 221 and this second bar portion 222, wherein, this first central axis 81 is 0 ~ 15 degree with the angle α 1 of this second central axis 82.

Each second bar portion 222 has one and is combined with this chair unit 3 binding end 224 installed, and each first bar portion 221 has the top 225 that is positioned at top, and one is positioned at below and connects forward the bottom 226 in the 3rd bar portion 223 highlightedly.The top 225 in the first bar portion 221 of each dorsal part bar 22 is 400 ~ 530mm along the length direction of this second central axis 82 to the length L1 of the binding end 224 in this second bar portion 222, the bottom 226 in the first bar portion 221 of each dorsal part bar 22 is 180 ~ 300mm along the length direction of this second central axis 82 to the length L2 of the binding end 224 in this second bar portion 222, and the center of the bottom 226 in each the first bar portion 221 is 18 ~ 30mm to the length L3 of this second central axis 82.

This leans against part 21 and opens up made by flexible material and support between described dorsal part bar 22, and described flexible material specifically can be cloth or rubber etc., does not need restriction.And this leans against part 21 and has the face that leans against 210 that can support the back of user forward, this leans against face 210 has exhibition first facial 211, exhibition of supportting between described first bar portion 221 and supports the second face 212 between described second bar portion 222, and the 3rd face 213 between described 3rd bar portion 223 is supportted in exhibition.

This chair unit 3 has a seating part 31, and two left and right sides and this seating part 31 can be opened to folding sit side lever 32 being installed on this seating part 31 respectively.

It is slightly S-shaped that each sits side lever 32, and all there is the rear rod portion 321 of this chair back unit 2 of vicinity, and a front bar portion 324 extended away from this chair back unit 2 direction by one end court connecting this rear rod portion 321, wherein, this rear rod portion 321 is all in curved arc shape, and there is a first curved arc section 322, an and second curved arc section 323 be connected between this first curved arc section 322 and this front bar portion 324.

This seating part 31 is made up of flexible material and opens up to support and sit between side lever 32 in described, and described flexible material specifically can be cloth or rubber etc., does not need restriction.And this seating part 31 has one can support the leg of user and the seating surface 310 of buttocks upward.This seating surface 310 has an exhibition and to support between described rear rod portion 321 and to put buttocks face 311 to lower recess, and exhibition to be supportted between described front bar portion 324 and is connected to this and puts buttocks face 311 and tilt to extend put lower limb face 312.

Consult Fig. 1,2,3, the handle unit 4 of the present embodiment has the handle 41 on two tops 225 being integrally formed at the first bar portion 221 of described dorsal part bar 22 respectively.It should be noted that, also can directly use as handle 41 with the first bar portion 221 of described dorsal part bar 22 on the implementation, therefore this utility model is not to be provided with this handle unit 4 for necessary.In addition, the armrest unit 5 of the present embodiment has the handrail 51 that two are arranged at the opposition side of this chair unit 3 respectively, and the pedal unit 6 of the present embodiment has two pedals 61 be arranged at below this chair unit 3.It should be noted that, this utility model is not also to be provided with this armrest unit 5 or this pedal unit 6 for necessary.Because the concrete structure of described handle 41, described handrail 51 and described pedal 61, setting position can adjust on demand with mounting means, also the emphasis improved of non-this utility model, does not describe in detail one by one, in graphic, be also only simple signal.

The travel mechanism 7 of the present embodiment comprises and is severally rotatably installed on this and takes wheel 71 in mechanism 1.Specifically, this travel mechanism 7 combines by several body of rod to be installed on this and to take in mechanism 1, and described wheel 71 can be installed on this chair back unit 2 or on this chair unit 3, does not need restriction.Certainly on the implementation, this travel mechanism 7 also can comprise one and be installed on this and take and mechanism 1 can make described wheel 71 to stop operating Brake car unit (not shown), thus increases the safety in utilization of this utility model chair tool.In addition, this travel mechanism 7 yet can comprise a driver element (not shown) that described wheel 71 can be driven to rotate, this driver element concrete example as motor, and then makes this take mechanism 1 except by except the mode of Manual-pushing, the also movement automatically by this driver element.Due to the emphasis that concrete structure and all non-this utility model of mounting means of the thin portion component of this travel mechanism 7 are improved, also no longer describe in detail, do not need at this form being particularly limited to this travel mechanism 7, also only simply illustrate this travel mechanism 7 in graphic.

Further illustrate, the chair tool of the present embodiment can fold, specifically, the dorsal part bar 22 of this chair back unit 2 can mutually be close to each other or away from, and this chair unit 3 sit side lever 32 also can mutually be close to each other or away from.When described dorsal part bar 22 mutually away from and exhibition support this lean against part 21, and described sit side lever 32 mutually away from and this seating part 31 of exhibition support time, this chair tool is available for users to seating.When the mutually contiguous and folding of described dorsal part bar 22, this leans against part 21, and described when sitting mutually contiguous and this seating part 31 of folding of side lever 32, just can reduce the volume of this chair tool and convenient for collecting.As for the emphasis of the non-this utility model improvement of the thin portion structure making this chair tool fold, no longer describe in detail.

Consult Fig. 2,3,4, during use, the buttocks of user and leg are sat and are placed on this seating part 31 taking the chair unit 3 of mechanism 1, and the back of user is placed in this takes leaning against on part 21 of the chair back unit 2 of mechanism 1.Wherein, the buttocks of user is sat accordingly to be placed in and is put buttocks face 311 to this of lower recess, and the seating surface 310 that can increase this seating part 31 reclines the area of user buttocks, thus dispersion concentrates on the active force of buttocks.On the other hand, in each dorsal part bar 22 of the present embodiment, this first central axis 81 is 0 ~ 15 degree with the angle α 1 of this second central axis 82, and the top 225 in this first bar portion 221 is 400 ~ 530mm along the length direction of this second central axis 82 to the length L1 of the binding end 224 in this second bar portion 222, the bottom 226 in this first bar portion 221 is 180 ~ 300mm along the length direction of this second central axis 82 to the length L2 of the binding end 224 in this second bar portion 222, the center of the bottom 226 in this first bar portion 221 is 18 ~ 30mm to the length L3 of this second central axis 82.

What further illustrate is, described length L1 is the height at corresponding user back and designs, and described length L2 is the height of corresponding user waist and designs, the degree that the bottom 226 that described length L3 represents this first bar portion 221 is given prominence to forward, thus make described dorsal part bar 22 all in bending appearance, and then this making exhibition support between described dorsal part bar 22 leans against part 21 and is also formed with bending structure.So, lean against on the face that leans against 210 of part 21 when the back of user is placed in this, can human vertebra curve-shape electronic be coordinated and the contact area with the back of user can be increased, thus more support force can be provided, thus reduce the burden of the vertebra used and promote the comfortableness of setting, user also can be avoided to produce the deformity of spinal column and contribute to the health of user simultaneously.

Consult Fig. 5,6,7, second embodiment of this utility model chair tool is roughly the same with this first embodiment, and difference is between the two: this takes the structure of the chair unit 3 of mechanism 1.

The side lever 32 of sitting of the chair unit 3 of the present embodiment is all long direct rod shape, and the seating part 31 of the chair unit 3 of the present embodiment is made up of a sheet material 30, and can be arranged at starting and describedly sit between side lever 32, one end of this seating part 31 is articulated in one of them and sits on side lever 32, and another end-rack of this seating part 31 is against another sits on side lever 32.In addition, the seating surface 310 of the seating part 31 of the present embodiment has this chair back unit 2 of a vicinity and puts buttocks face 311 to lower recess, and two are connected to this and put buttocks face 311 and put lower limb face 312 in contrast to the side of this chair back unit 2 and to lower recess, this put buttocks face 311 recessed innermost degree of depth D1 be greater than described in put lower limb face 312 recessed innermost degree of depth D2.

In use, when described sit side lever 32 mutually away from time, one end of this seating part 31 is articulated in one of them and sits on side lever 32, and another end-rack of this seating part 31 is against another and sits on side lever 32, is thus available for users to seating.When needing the chair tool folding the present embodiment, as long as upwards raise this seating part 31, one of them sits side lever 32 pivotable relatively to make one end of this seating part 31, and the other end of this seating part 31 departs from another and sits side lever 32 and upwards swing, described side lever 32 of sitting now just can be made mutually contiguous and fold this chair tool.

What further illustrate is, the sheet material 30 of the present embodiment has two and is positioned at opposition side and is articulated in described the first articulated section 301 sat on side lever 32 respectively removably, each first articulated section 301 has several double wall 304 of a group between two, and several lay respectively at described between two between the double wall 304 of a group for the corresponding clip slot 305 sat side lever 32 and engage separatably.Therefore, the seating part 31 of the present embodiment except by aforementioned one-sided on except the occupation mode of turning over, also this seating part 31 can be separated completely and describedly sit side lever 32, to fold this chair tool.

It is worth mentioning that, this put buttocks face 311 recessed innermost degree of depth D1 be greater than described in put lower limb face 312 recessed innermost degree of depth D2 structural design, the buttocks that can increase user equally sits the area that reclines be placed in when this puts buttocks face 311, thus dispersion concentrates on the active force of buttocks.Meanwhile, described in put lower limb face 312 indents structure also can increase the contact area with the leg of user, thus increase support effect.Therefore, the chair unit 3 of the present embodiment equally also effectively can alleviate the buttocks of user and the burden of leg, reduces the uncomfortable sensations such as pain and occurs, and thus promotes comfortableness when taking.

Consult Fig. 8,9,10, the 3rd embodiment of this utility model chair tool is roughly the same with this second embodiment, and difference is between the two: the structure of the seating part 31 of this chair unit 3.

The seating part 31 of the present embodiment be by the sheet material 30 of several mutual pivot joint form and can be arranged to folding and describedly sit between side lever 32, the end opposite of this seating part 31 is sat described in pivot joint on side lever 32 respectively.Specifically, the quantity of the sheet material 30 of the present embodiment is two and symmetrical, each sheet material 30 all has one and is articulated in first articulated section 301 sat side lever 32 on corresponding with it, and second articulated section 302 be articulated on another adjacent sheet material 30.Each second articulated section 302 all has a stopping surface 303.

When described sit side lever 32 mutually away from time, the stopping surface 303 of the second articulated section 302 of this seating part 31 abuts against support mutually, makes described sheet material 30 launch and be available for users to seating.When needing the chair tool folding the present embodiment, as long as upwards start the second articulated section 302 of this seating part 31, make that the first articulated section 301 of described sheet material 30 is relatively described respectively sits side lever 32 pivotable, and the second articulated section 302 of described sheet material 30 respectively to upper swing and described stopping surface 303 mutually do not abut against, described side lever 32 of sitting now just can be made mutually contiguous and fold this chair tool.It should be noted that, in the present embodiment, the quantity of described sheet material 30 explains for two, but on the implementation, and the quantity of described sheet material 30 can be more and pivot joint each other, so do not need the quantity limiting described sheet material 30.

In addition, although the seating surface 310 of the seating part 31 of the present embodiment has this chair back unit 2 contiguous and put buttocks face 311 to this of lower recess equally, and be connected to this put buttocks face 311 and turn forward extend described in put lower limb face 312, but should be noted, the angle α 2 putting lower limb face 312 and a horizontal line 80 of the present embodiment is 3 ~ 8 degree, specifically, this seating surface 310 front peak is 3 ~ 8 degree to the angle α 2 of rear minimum point line and this horizontal line 80.

During use, the buttocks of user is sat accordingly to be placed in and is put buttocks face 311 to this of lower recess, and the seating surface 310 that can increase this seating part 31 reclines the area of user buttocks, thus dispersion concentrates on the active force of buttocks.Simultaneously, the leg of user is then supported in this that tilt to extend and puts on lower limb face 312, and this puts lower limb face 312 is 3 ~ 8 degree with angle α 2 of this horizontal line 80, aforementioned innovation structure and except providing support effect, the leg of user also can accordingly with folder 3 ~ 8 degree of angles of horizontal line 80.With regard to ergonomics, aforementioned this put buttocks face 311 indents respective outer side edges described in put lower limb face 312 tilt innovative design, the buttocks of user and the burden of leg can be alleviated, reduce the chance that the uncomfortable sensations such as pain occur, thus can promote comfortableness when taking.In addition, described in put the structure that lower limb face 312 tilts to extend, user also can be avoided to fall because of crank outside this chair tool, and then the stability can also promoted when taking and safety.

In sum, the chair back unit taking mechanism of the present embodiment is by the appearance of described dorsal part rod bending, the particularly design given prominence to forward of the bottom in the first bar portion of described dorsal part bar, make this lean against back that part can support user effectively, reduces the back burden of user.Coordinate simultaneously this that this seating part taking the chair unit of mechanism formed depression put buttocks face and tilt described in put lower limb face, the buttocks of user of can fitting and leg and dispersive stress also reduce the heavy burdens.By aforementioned innovation and the structural design of hommization, make the chair tool of the present embodiment quite comfortable comfortable when user seating, so really can the purpose of this utility model be reached.

Claims (13)

1. a chair tool, comprises one and takes mechanism, and this is taken mechanism and comprises a chair unit, and a chair back unit being arranged at this chair unit rear; it is characterized in that: this chair back unit has one and leans against part, and two are installed on this left and right sides leaning against part and the dorsal part bar making this lean against part can to open to folding respectively, each dorsal part bar all has a first bar portion extended along first central axis, one extends and the second bar portion be positioned at below this first bar portion along second central axis, and a 3rd bar portion be connected between this first bar portion and this second bar portion, each second bar portion has one and is combined with this chair unit the binding end installed, each first bar portion has the top that is positioned at top, and one is positioned at below and connects forward the bottom in the 3rd bar portion highlightedly, the top in the first bar portion of each dorsal part bar along this second central axis to the length of the binding end in this second bar portion be 400 ~ 530mm, the bottom in the first bar portion of each dorsal part bar along this second central axis to the length of the binding end in this second bar portion be 180 ~ 300mm, the center of the bottom in each the first bar portion is 18 ~ 30mm to the length of this second central axis.

2. chair tool according to claim 1, is characterized in that: the angle of this first central axis and this second central axis is 0 ~ 15 degree.

3. chair tool according to claim 1 and 2, it is characterized in that: this leans against part has one and lean against face, this leans against mask that first facial between described first bar portion is supportted in an exhibition, the second face between described second bar portion is supportted in exhibition, and the 3rd face between described 3rd bar portion is supportted in exhibition.

4. chair tool according to claim 1, is characterized in that: this chair unit has a seating part, and this seating part has a seating surface, and this seating surface has this chair back unit of a vicinity and puts buttocks face to lower recess.

5. chair tool according to claim 4, is characterized in that: this seating surface also have one be connected to this put buttocks face in contrast to this chair back unit side and turn forward extend put lower limb face, this put lower limb face with a horizontal angle be 3 ~ 8 degree.

6. chair tool according to claim 4, it is characterized in that: this seating surface also has two and is connected to this and puts buttocks face in contrast to the side of this chair back unit and put lower limb face to lower recess, this put the recessed innermost degree of depth of buttocks face be greater than described in put the recessed innermost degree of depth of lower limb face.

7. the chair tool according to claim 5 or 6, is characterized in that: this chair unit also have two be arranged at the left and right sides of this seating part respectively sit side lever.

8. chair tool according to claim 7, it is characterized in that: this seating part is formed by a sheet material and can be arranged at starting describedly to sit between side lever, one end of this seating part is articulated in one of them and sits another end-rack of this seating part on side lever and be against another and sit on side lever.

9. chair tool according to claim 7, is characterized in that: this seating part is formed by the sheet material of several mutual pivot joint and can be arranged to folding describedly to sit between side lever, and the end opposite of this seating part is articulated in described seat on side lever respectively.

10. chair tool according to claim 4, is characterized in that: this seating part is made by flexible material, and this chair unit also has two left and right sides and this seating part can be opened to folding sit side lever being installed on this seating part respectively.

11. chair tools according to claim 5, it is characterized in that: this seating part is made by flexible material, and this chair unit also has two left and right sides and make this seating part open to folding sit side lever being installed on this seating part respectively, each is sat side lever and all has one to the rear rod portion should putting buttocks face, and one connects this rear rod portion and to the front bar portion should putting lower limb face.

12. chair tools according to claim 11, it is characterized in that: each sits the rear rod portion of side lever all in curved arc shape, and each is sat side lever and all has a first curved arc section, and a second curved arc section be connected between this first curved arc section and this front bar portion.

13. chair tools according to claim 1, is characterized in that: this chair tool also comprises one and takes mechanism with this and be combined and install and make this take moveable travel mechanism of mechanism, and this travel mechanism comprises and is severally rotatably installed on this and takes wheel in mechanism.