Abstract:
A limiting plate control device is for a scooter luggage. The device includes first and second shells that form a cavity shell, and a sliding pressing block, first and second sliders, and first and second elastic elements that are all located within the cavity shell. The device comprises an extrusion mechanism configured to allow the first slider protrusion to retract into the cavity shell by pushing the pressing block and to allow the second slider protrusion to retract by further pushing the pressing block. The device has a simple structure and is easy to operate. Moreover, a button shell for a scooter luggage is provided. The button shell has a spilt frame which includes a first baffle with a limiting bump and a second baffle with a limiting groove. The button shell has a simple structure and is easy to assemble and operate.

Description:
TECHNICAL FIELD OF THE INVENTION 
       [0001]    The present invention relates to the field of machinery construction, and in particular, to the scooter luggage. 
       BACKGROUND OF THE INVENTION 
       [0002]    Currently, the scooter has already become a main recreation utility applied by many children. The scooter is capable to be folded. Unfold the scooter for use, and fold it up for easy storage. The limiting plate is required to control the folding of the scooter. When the folding of the scooter is controlled by buttons, button shells are required to fix the buttons. At present, difficulties have been brought to the user due to the complicated structure and inconvenient operation of the control mechanism of the limiting plate and button shell. 
         [0003]    With the prevalence of the scooter, scooter luggage has emerged currently, which integrates the luggage and scooter. Similarly because of the complicated structure and inconvenient operation of the control mechanism of the limiting plate and button shell, the complicated structure and inconvenient folding of the scooter luggage have brought difficulties to the user. 
         [0004]    The current scooter luggage has the defect of being unable to change directions, which is inconvenient to use. 
       SUMMARY OF THE INVENTION 
       [0005]    The purpose of the present disclosure is to solve the above-mentioned existing technical problems. 
         [0006]    According to one aspect of the present disclosure, a kind of limiting plate control mechanism is provided, which comprises the first shell, second shell, sliding body, first contact body, second contact body, flexible joint. The first shell  101  and second shell  102  combine into the cavity shell. The sliding body, first contact body and second contact body are all located in the cavity shell. The sliding body can slide in the cavity shell. The first contact body connects with the sliding body. The second contact body connects with the inner surface of the cavity shell; the flexible joint bypasses the first contact body and second contact body, and two ends of the flexible joint stick out of the cavity shell; when the cavity shell moves along the flexible joint, the displacement of the flexible joint does not be caused; when the first contact body sliding compresses the flexible joint, one end of the flexible joint will retract inward the cavity shell. 
         [0007]    Optionally, the first contact body is the first pulley, and the second connect body is the second pulley. The flexible joint is wire rope. The first pulley is set on the sliding body, and the first pulley can make fixed-point rotation on the sliding body. The second pulley is set on the inner surface of the cavity shell, and the second pulley can make fixed-point rotation on the inner surface of the cavity shell. 
         [0008]    Optionally, this limiting plate control mechanism also comprises the sliding body spring which can reset the sliding body, one end of the sliding body spring is pressed against the sliding body, and the other end of the sliding body spring is pressed against the inner surface of the cavity shell. 
         [0009]    Optionally, the end part of the flexible joint penetrates into one end of the cavity shell, bypasses the bottom of the first contact body and the top of the second contact body in succession, and penetrates out of the other end of the sliding body spring cavity shell. 
         [0010]    The present disclosure also provides a kind of scooter luggage equipped with the limiting plate control mechanism, including the first link rod, limiting plate, scooter body, luggage; the scooter body comprises the slide plate and frame that connect with each other, and are able to open and fold. The luggage is installed on the frame; the first link rod connects with the sliding body; one end of the flexible joint connects with the limiting plate; the other end of the sliding body spring flexible body connects with the frame; the limiting plate is used to limit the folding and unfolding of the slide plate and frame. 
         [0011]    Optionally, this scooter luggage also comprises a slider. The slider is provided with convex column. The slider is located in the cavity shell; the cavity shell is provided with the hole allowing the convex column to extend and retract; the slider is located in the cavity shell. This scooter luggage also comprises the driving mechanism allowing the slider to transversely slide in the cavity shell. 
         [0012]    Optionally, this scooter luggage also comprises the second link rod. The driving mechanism comprises the pressing block, slider spring. The slider groove is set on the inner surface of the cavity shell; the slider is located in the slider groove; the slider spring is located between the slider and the inner surface of the slider groove, and the slider spring is contacted respectively with the slider and inner surface of the slider groove; the convex column sticks out of the hole; the second link rod is connected with the pressing block; the pressing block is located in the cavity shell, and the pressing block is able to longitudinally slide along the cavity shell. The pressing block is provided with pressing block inclined surface; the slider is provided with slide inclined surface; the pressing block inclined surface is pressed above the slider inclined surface. 
         [0013]    Optionally, the scooter frame comprises a tie rod inner tube, tie rod exterior tube, angle seat, handle, first button, second button, limiting plate spring. The cavity shell, first link rod and second link rod are all located in the inner tube of the tie rod; the first link rod and second link rod can move inside of the tie rod inner tube. The cavity shell is fixed to connect within the tie rod inner tube. The tie rod inner tube is provided with the tie rod inner tube hole. The convex column sticks out of the tie rod inner tube hole. The first button is connected with the first link rod, and the second button is connected with the second link rod. The second button is provided with the installation hole; the first button is located in the installation hole; the second button is installed at the end part of the of the tie rod inner tube; the handle  604  is installed on the end part of the tie rod inner tube  601 ; the tie rod inner tube is located inside the tie rod exterior tube, and the tie rod inner tube is able to move within the tie rod exterior tube. The tie rod exterior tube is provided with several tie rod exterior tube holes where the convex columns stick out. The tie rod exterior tube is connected with the angle seat, and the angle seat is provided with open slot. The limiting plate is located in the open slot; one end of the limiting plate spring is pressed against the open slot; the other end of the sliding body spring limiting plate spring is pressed against the bottom of the limiting plate; the flexible joint is located in the tie rod inner tube; the other end of the sliding body spring flexible joint is fixedly connected with the tie rod exterior tube; the slide plate is provided with angle head, and the angle head forms a flexible connection with the angle seat; the angle head is provided with at least two limiting slots in which the limiting plate can be embedded. 
         [0014]    Optionally, the slide plate comprises a front axle, front wheel, front fork, peddle support, rear wheel, fork crown cover. The fork crown cover is rotationally fixed to the angle head. The front fork is connected with the front axle; the fork crown cover is rotationally connected with the front fork; the angle head is provided with connection sheet which is connected with the front axle. There are two front wheels which are respectively installed on both ends of the front axle. The front end of the paddle support is connected with the fork crown cover; the tail end of the paddle support is equipped with the rear wheel. 
         [0015]    As an option, the front axle is provided with the first guide wheel and second guide wheel. The fork crown cover is provided with the first supporting inclined surface and second supporting inclined surface. The front fork is located between the first guide wheel and second guide wheel; the first guide wheel is contacted with the first supporting inclined surface, and the second guide wheel is contacted with the second supporting inclined surface. 
         [0016]    According to another aspect of the present disclosure, another kind of limiting plate control device is provided, which comprises the first shell, second shell, sliding pressing block, first slider, second slider, first elastic element, second elastic element. The first shell and second shell composes the cavity shell; the sliding pressing block, first slider, second slider, first elastic element and second elastic element are all located in the cavity shell; the sliding pressing block can move longitudinally along the cavity shell; the first slider and second slider can slide transversely along the cavity shell. The longitudinal direction refers to the direction from the end part of the cavity shell to the root of it; the transverse direction refers to the direction from the first shell to second shell. The first slider limiting slot and second slider limiting slot are installed in the cavity shell; the first slider is located in the first slider limiting slot, and the second slider is located in the second slider limiting slot. The first shell is provided with the first shell hole; the first slider is provided with the first slider protrusion, and the second slider is provided with the second slider protrusion; the second shell is provided with the second shell hole. The first elastic element is pressed against the first slider, making the first slider protrusion stretch out of the first shell hole. The second elastic element is pressed against the second slider, making the second slider protrusion be located in the cavity shell. The first slider protrusion is in clearance fit with the first shell hole, and the second slider protrusion is in clearance fit with the second shell hole. The first slider and second slider are longitudinally placed in succession in the cavity shell. This limiting plate control device comprises extrusion mechanism which comprises the first extrusion part and second extrusion part connecting with the sliding pressing block. The extrusion mechanism is used to achieve that: when pushing down the sliding pressing block, the first extrusion part squeezes the first slider, making the first slider protrusion retract back into the cavity shell, and the second extrusion part doesn&#39;t squeeze the second slider and continue pushing down the sliding pressing block to make the second extrusion part squeeze the second slider, making the second slider protrusion retract back into the cavity shell. 
         [0017]    Optionally, the sliding pressing block comprises a sliding element composed by the first connector and second connector. The sliding element is of the shape of N. The number of the first extrusion part is two, and that of the second extrusion part is two as well. One first extrusion part and one second extrusion part are successively set up in the inner side surface of the first connector, and the other first extrusion part and the other second extrusion part are successively set up in the inner side surface of the second connector. The first shell is provided with the first split groove, and the second shell is provided with the first split chamber. The first split groove and first split chamber are fastened, composing the first slider limiting slot. The mentioned first shell hole is located in the first split groove; the fist shell is provided with the second split groove, and the second shell is provided with the second split chamber. The second split groove and second chamber are fastened, composing the second slider limiting slot. The second shell hole is located within the second split chamber; the first slider limiting slot and second slider limiting slot are all located within the open space of the sliding element. 
         [0018]    Optionally, the first slider is provided with two first slopes, and the second slider is provided with two second slopes. Two extrusion parts are respectively provided with the first inclined surfaces used to coordinate respectively with the two first slopes. Two second extrusion parts are respectively provided with the second inclined surfaces used to coordinate respectively with the two second slopes. 
         [0019]    Optionally, the first elastic element is the first spring, and the second elastic element is the second spring. The sliding pressing block is provided with the extending part connected with the sliding element, which is provided with longitudinal chute. The inner surface of the end part of the cavity shell is equipped with the transverse chute. This limiting plate control device also comprises the steel ball and the third spring. The extending part sticks out of the end part of the cavity shell. The steel ball and third spring are all located in the transverse chute. The third spring squeezes the steel ball into the longitudinal chute, and the steel ball can roll within the longitudinal chute and transverse chute. 
         [0020]    The present disclosure also provide a kind of scooter luggage equipped with the limiting plate control mechanism, including the link rod, limiting plate, scooter body, luggage. The scooter body comprises the slide plate and frame that connect with each other, and are able to open and fold. The luggage is installed on the frame; the link rod is connected with the sliding pressing block. The scooter frame comprises the tie rod inner tube, tie rod exterior tube, tie line and tension sheet. The cavity shell and link rod are all located in the tie rod inner tube. The link rod can move within the tie rod inner tube. The cavity shell is fixed into the tie rod inner tube which is provided with the tie rod inner tube hole. The first slider protrusion sticks out of the tie rod inner tube hole. The tie rod inner tube is located in the tie rod exterior tube, which can move in the tie rod exterior tube. The tie rod exterior tube is provided with several tie rod exterior tube holes where the first slider protrusions can stretched out. The tension sheet is located in the tie rod exterior tube, which can move within the tie rod exterior tube. It is also provided with the tension sheet hole in which the second slider protrusion can be embedded. One end of the tie line is connected with the tension sheet, and the other end of it is connected with the limiting plate used to limit the folding and unfolding of the slide plate and frame. 
         [0021]    Optionally, the slide plate comprises a front axle, front wheel, front fork, peddle support, rear wheel, fork crown cover. The fork crown cover is rotationally fixed to the angle head. The front fork is connected with the front axle; the fork crown cover is rotationally connected with the front fork; the angle head is provided with connection sheet which is connected with the front axle. There are two front wheels which are respectively installed on both ends of the front axle. The front end of the paddle support is connected with the fork crown cover; the tail end of the paddle support is equipped with the rear wheel. 
         [0022]    Optionally, the front axle is provided with the first guide wheel and second guide wheel. The fork crown cover is provided with the first supporting inclined surface and second supporting inclined surface. The front fork is located between the first guide wheel and second guide wheel; the first guide wheel is contacted with the first supporting inclined surface, and the second guide wheel is contacted with the second supporting inclined surface. 
         [0023]    The simple control mechanism and easy operation of the limiting plate brings convenience to the user. The present scooter luggage has a simple structure, and is easy to operate and fold. 
         [0024]    According to another aspect of the present disclosure, a kind of button shell is provided, including a split frame which is provided with the first baffle and second baffle. The first baffle is provided with the limiting protrusion, and the second baffle is provided with the limiting slot. The there is a clearance between the first baffle and second baffle. The split frame comprises the first split frame and second split frame. The first split frame has the same structure with the second split frame; the limiting protrusion of the first split frame is embedded into the limiting slot of the second split frame, forming the first supporting plate; the limiting protrusion of the second split frame is embedded into the limiting slot of the first split frame, forming the second supporting plate. The button shell comprises the spatial accommodation constituted by the clearance between the first supporting plate and second supporting plate, which is provided with button limiting slot. 
         [0025]    Optionally, the first baffle and second baffle of the split frame are equipped with button limiting slots. The split frame is provided with the third baffle. The first baffle and second baffle are respectively connected with the third baffle which is equipped with the baffle hole. 
         [0026]    The present disclosure also provides a kind of scooter luggage with the button shell, including the second button which comprises the arc connector and embedded bolt part interlinked with the arc connector. The inner surface of the arc connector is provided with the limiting bump. The embedded bolt part is located in the space, which can slide up and down within this space. The limiting bump is located in the button limiting slot. 
         [0027]    Optionally, the luggage also comprises a limiting plate control mechanism which includes the first shell, second shell, sliding body, first contact body, second contact body, flexible joint. The first shell  101  and second shell  102  combine into the cavity shell. The sliding body, first contact body and second contact body are all located in the cavity shell. The sliding body can slide in the cavity shell. The first contact body connects with the sliding body. The second contact body connects with the inner surface of the cavity shell; the flexible joint bypasses the first contact body and second contact body, and two ends of the flexible joint stretch out of the cavity shell; when the cavity shell moves along the flexible joint, the displacement of the flexible joint does not be caused; when the first contact body sliding compresses the flexible joint, one end of the flexible joint will retract inward the cavity shell. 
         [0028]    Optionally, the first contact body is the first pulley, and the second connect body is the second pulley. The flexible joint is wire rope. The first pulley is set on the sliding body, and the first pulley can make fixed-point rotation on the sliding body. The second pulley is set on the inner surface of the cavity shell, and the second pulley can make fixed-point rotation on the inner surface of the cavity shell. 
         [0029]    Optionally, this limiting plate control mechanism also comprises a sliding body spring which can reset the sliding body, one end of the sliding body spring is pressed against the sliding body, and the other end of the sliding body spring is pressed against the inner surface of the cavity shell. The end part of the flexible joint penetrates into one end of the cavity shell, bypasses the bottom of the first contact body and the top of the second contact body in succession, and penetrates out of the other end of the cavity shell. 
         [0030]    Optionally, this scooter luggage comprises the first link rod, limiting plate, scooter body, luggage; the scooter body comprises the slide plate and frame that connect with each other, and are able to open and fold. The luggage is installed on the frame; the first link rod connects with the sliding body; one end of the flexible joint connects with the limiting plate; the other end of the flexible body connects with the frame; the limiting plate is used to limit the folding and unfolding of the slide plate and frame. 
         [0031]    Optionally, this scooter luggage also comprises a slider. The slider is provided with convex column. The slider is located in the cavity shell; the cavity shell is provided with the hole allowing the convex column to extend and retract; the slider is located in the cavity shell. This scooter luggage also comprises the driving mechanism allowing the slider to transversely slide in the cavity shell. This scooter luggage also comprises the second link rod. The driving mechanism comprises the pressing block, slider spring. The slider groove is set on the inner surface of the cavity shell; the slider is located in the slider groove; the slider spring is located between the slider and the inner surface of the slider groove, and the slider spring is contacted respectively with the slider and inner surface of the slider groove; the convex column sticks out of the hole; the second link rod is connected with the pressing block; the pressing block is located in the cavity shell, and the pressing block is able to longitudinally slide along the cavity shell. The pressing block is provided with pressing block inclined surface; the slider is provided with slide inclined surface; the pressing block inclined surface is pressed above the inclined surface of the slider. 
         [0032]    Optionally, the scooter frame comprises a tie rod inner tube, tie rod exterior tube, angle seat, handle, first button, second button, limiting plate spring. The cavity shell, first link rod and second link rod are all located in the inner tube of the tie rod; the first link rod and second link rod can move inside of the tie rod inner tube. The cavity shell is fixed to connect within the tie rod inner tube. The tie rod inner tube is provided with the tie rod inner tube hole. The convex column sticks out of the tie rod inner tube hole. The first button is connected with the first link rod, and the second button is connected with the second link rod. The second button is provided with the installation hole; the first button is located in the installation hole; the second button is installed at the end part of the of the tie rod inner tube; the handle  604  is installed on the end part of the tie rod inner tube  601 ; the tie rod inner tube is located inside the tie rod exterior tube, and the tie rod inner tube is able to move within the tie rod exterior tube. The tie rod exterior tube is provided with several tie rod exterior tube holes where the convex columns are stretched out. The tie rod exterior tube is connected with the angle seat, and the angle seat is provided with open slot. The limiting plate is located in the open slot; one end of the limiting plate spring is pressed against the open slot; the other end of the limiting plate spring is pressed against the root part of the limiting plate; the flexible joint is located in the tie rod inner tube; the other end of the flexible joint is fixedly connected with the tie rod exterior tube; the slide plate is provided with angle head, and the angle head forms a flexible connection with the angle seat; the angle head is provided with at least two limiting slots in which the limiting plate can be embedded. 
         [0033]    Optionally, the slide plate comprises a front axle, front wheel, front fork, peddle support, rear wheel, fork crown cover. The fork crown cover is rotationally fixed to the angle head. The front fork is connected with the front axle; the fork crown cover is rotationally connected with the front fork; the angle head is provided with connection sheet which is connected with the front axle. There are two front wheels which are respectively installed on both ends of the front axle. The front end of the paddle support is connected with the fork crown cover; the tail end of the paddle support is equipped with the rear wheel. The front axle is provided with the first guide wheel and second guide wheel. The fork crown cover is provided with the first supporting inclined surface and second supporting inclined surface. The front fork is located between the first guide wheel and second guide wheel; the first guide wheel is contacted with the first supporting inclined surface, and the second guide wheel is contacted with the second supporting inclined surface. 
         [0034]    The button shell provided by the present disclosure has a simple structure, and is easy to assemble and operate, which brings convenience to the user. The scooter luggage provided by the present disclosure has simple structure, and is easy to operate and fold. 
         [0035]    According to a further aspect of the present disclosure, a kind of scooter luggage is provided, which comprises the scooter body, luggage. The scooter body includes the slide plate and scooter frame. The luggage is installed on the frame, and the slide plate is equipped with angle head. The slide plate comprises the front axle, front wheel, front fork, peddle support, rear wheel, fork crown cover. The fork crown cover is rotationally fixed to the angle head. The front fork is connected with the front axle; the fork crown cover is rotationally connected with the front fork; the angle head is provided with connection sheet which is connected with the front axle. There are two front wheels which are respectively installed on both ends of the front axle. The front end of the paddle support is connected with the fork crown cover; the tail end of the paddle support is equipped with the rear wheel. 
         [0036]    Optionally, the slide plate comprises a front axle, front wheel, front fork, peddle support, rear wheel, fork crown cover. The fork crown cover is rotationally fixed to the angle head. The front fork is connected with the front axle; the fork crown cover is rotationally connected with the front fork; the angle head is provided with connection sheet which is connected with the front axle. There are two front wheels which are respectively installed on both ends of the front axle. The front end of the paddle support is connected with the fork crown cover; the tail end of the paddle support is equipped with the rear wheel. 
         [0037]    Optionally, the first supporting inclined surface has the same structure with the second supporting inclined surface. The structure from the root part of the first supporting inclined surface to the end part of it is from thin to thick. The structure from the root part of the second supporting inclined surface to the end part of it is from thin to thick as well. The root part of the first supporting inclined surface is connected with the fork crown cover, and the root part of the second supporting inclined surface is connected with the fork crown cover. 
         [0038]    Optionally, this scooter luggage also compromises a control mechanism of the limiting plate, which includes the first shell, second shell, sliding body, first contact body, second contact body, flexible joint. The first shell  101  and second shell  102  combine into the cavity shell. The sliding body, first contact body and second contact body are all located in the cavity shell. The sliding body can slide in the cavity shell. The first contact body connects with the sliding body. The second contact body connects with the inner surface of the cavity shell; the flexible joint bypasses the first contact body and second contact body, and two ends of the flexible joint stretch out of the cavity shell; when the cavity shell moves along the flexible joint, the displacement of the flexible joint does not be caused; when the first contact body sliding compresses the flexible joint, one end of the flexible joint will retract inward the cavity shell. 
         [0039]    Optionally, the first contact body is the first pulley, and the second connect body is the second pulley. The flexible joint is wire rope. The first pulley is set on the sliding body, and the first pulley can make fixed-point rotation on the sliding body. The second pulley is set on the inner surface of the cavity shell, and the second pulley can make fixed-point rotation on the inner surface of the cavity shell. 
         [0040]    Optionally, this limiting plate control mechanism also comprises a sliding body spring which can reset the sliding body, one end of the sliding body spring is pressed against the sliding body, and the other end of the sliding body is pressed against the inner surface of the cavity shell. The end part of the flexible joint penetrates into one end of the cavity shell, bypasses the bottom of the first contact body and the top of the second contact body in succession, and penetrates out of the other end of the cavity shell. 
         [0041]    Optionally, this scooter luggage also comprises the first link rod, limiting plate, scooter body, luggage; the scooter body comprises the slide plate and frame that connect with each other, and are able to open and fold. The luggage is installed on the frame; the first link rod connects with the sliding body; one end of the flexible joint connects with the limiting plate; the other end of the sliding body spring flexible body connects with the frame; the limiting plate is used to limit the folding and unfolding of the slide plate and frame. 
         [0042]    Optionally, this scooter luggage also comprises a slider. The slider is provided with convex column. The slider is located in the cavity shell; the cavity shell is provided with the hole allowing the convex column to extend and retract; the slider is located in the cavity shell. This scooter luggage also comprises the driving mechanism allowing the slider to transversely slide in the cavity shell. 
         [0043]    Optionally, this scooter luggage also comprises the second link rod. The driving mechanism comprises the pressing block, slider spring. The slider groove is set on the inner surface of the cavity shell; the slider is located in the slider groove; the slider spring is located between the slider and the inner surface of the slider groove, and the slider spring is contacted respectively with the slider and inner surface of the slider groove; the convex column sticks out of the hole; the second link rod is connected with the pressing block; the pressing block is located in the cavity shell, and the pressing block is able to longitudinally slide along the cavity shell. The pressing block is provided with pressing block inclined surface; the slider is provided with slide inclined surface; the pressing block inclined surface is pressed above the slider inclined surface. 
         [0044]    Optionally, the scooter frame comprises a tie rod inner tube, tie rod exterior tube, angle seat, handle, first button, second button, limiting plate spring. The cavity shell, first link rod and second link rod are all located in the inner tube of the tie rod; the first link rod and second link rod can move inside of the tie rod inner tube. The cavity shell is fixed to connect within the tie rod inner tube. The tie rod inner tube is provided with the tie rod inner tube hole. The convex column sticks out of the tie rod inner tube hole. The first button is connected with the first link rod, and the second button is connected with the second link rod. The second button is provided with the installation hole; the first button is located in the installation hole; the second button is installed at the end part of the of the tie rod inner tube; the tie rod inner tube is located inside the tie rod exterior tube, and the tie rod exterior tube is able to move within the tie rod exterior tube. The tie rod exterior tube is provided with several tie rod exterior tube holes where the convex columns are stretched out. The tie rod exterior tube is connected with the angle seat, and the angle seat is provided with open slot. The limiting plate is located in the open slot; one end of the limiting plate spring is pressed against the open slot; the other end of the sliding body spring limiting plate spring is pressed against the bottom of the limiting plate; the flexible joint is located in the tie rod inner tube; the other end of the sliding body spring flexible joint is fixedly connected with the tie rod exterior tube; the slide plate is provided with angle head, and the angle head forms a flexible connection with the angle seat; the angle head is provided with at least two limiting slots in which the limiting plate can be embedded. 
         [0045]    The scooter luggage provided by the present disclosure is able to change directions, and easy to operate, which brings the user convenience. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0046]    Other characteristics, purposes and advantages of the present invention will become more evident via reading the following figures describing the non-limiting embodiments: 
           [0047]      FIG. 1  is the breakdown structure diagram of the limiting plate control mechanism according to one aspect of the present disclosure, in which the limiting plate is not installed. 
           [0048]      FIG. 2  is the breakdown structure diagram of the limiting plate control mechanism according to one aspect of the present disclosure, in which the limiting plate is installed. 
           [0049]      FIG. 3  is the breakdown structure diagram of the limiting plate control mechanism according to one aspect of the present disclosure, in which the limiting plate and wire rope are not installed. 
           [0050]      FIG. 4  is the breakdown structure diagram of the scooter luggage according to one aspect of the present disclosure. 
           [0051]      FIG. 5  is the breakdown structure diagram of the scooter luggage according to one aspect of the present disclosure, in which the luggage is not installed. 
           [0052]      FIG. 6  is the structure diagram of the slide plate according to one aspect of the present disclosure. 
           [0053]      FIG. 7  is the breakdown structure diagram of the slide plate according to one aspect of the present disclosure. 
           [0054]      FIG. 8  is the folding structure diagram of the scooter luggage according to one aspect of the present disclosure, in which the luggage is not installed. 
           [0055]      FIG. 9  is the left-turning structure diagram of the slide plate according to one aspect of the present disclosure. 
           [0056]      FIG. 10  is the right-side structure diagram of the slide plate in  FIG. 9  when it turns left. 
           [0057]      FIG. 11  is the left-side structure diagram of the slide plate in  FIG. 9  when it turns left. 
           [0058]      FIG. 12  is the right-turning structure diagram of the slide plate according to one aspect of the present disclosure. 
           [0059]      FIG. 13  is the right-side structure diagram of the slide plate in  FIG. 9  when it turns right. 
           [0060]      FIG. 14  is the left-side structure diagram of the slide plate in  FIG. 9  when it turns right. 
           [0061]      FIG. 15  is the first service state structure diagram of the scooter luggage according to one aspect of the present disclosure. 
           [0062]      FIG. 16  is the second service state structure diagram of the scooter luggage according to one aspect of the present disclosure. 
           [0063]      FIG. 17  is the third service state structure diagram of the scooter luggage according to one aspect of the present disclosure. 
           [0064]      FIG. 18  is the fourth service state structure diagram of the scooter luggage according to one aspect of the present disclosure. 
           [0065]      FIG. 19  is the fifth service state structure diagram of the scooter luggage according to one aspect of the present disclosure. 
           [0066]      FIG. 20  is the sixth service state structure diagram of the scooter luggage according to one aspect of the present disclosure. 
           [0067]      FIG. 21  is the front structure diagram of the second button and second link rod according to one aspect of the present disclosure. 
           [0068]      FIG. 22  is the side structure diagram of the second button and second link rod according to one aspect of the present disclosure. 
           [0069]      FIG. 23  is the front structure diagram of the first button and first link rod according to one aspect of the present disclosure. 
           [0070]      FIG. 24  is the structure diagram of the button shell according to one aspect of the present disclosure. 
           [0071]      FIG. 25  is the structure diagram of the first split frame according to another aspect of the present disclosure. 
           [0072]      FIG. 26  is the structure diagram of the second split frame according to another aspect of the present disclosure. 
           [0073]      FIG. 27  is the spatial structure diagram of the second button according to another aspect of the present disclosure. 
           [0074]      FIG. 28  is the structure diagram of one side of the second button according to another aspect of the present disclosure. 
           [0075]      FIG. 29  is the structure diagram of the other side of the second button according to another aspect of the present disclosure. 
           [0076]      FIG. 30  is the structure diagram of the second button and button shell being assembled together according to another aspect of the present disclosure. 
           [0077]      FIG. 31  is the breakdown structure diagram of the limiting plate control mechanism according to another aspect of the present disclosure. 
           [0078]      FIG. 32  is the structure diagram of the limiting plate control mechanism according to the third aspect of the present disclosure. 
           [0079]      FIG. 33  is the structure diagram of the sliding pressing block and first shell being assembled together according to the third aspect of the present disclosure. 
           [0080]      FIG. 34  is the breakdown structure diagram of the scooter luggage according to the third aspect of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0081]    Technicians in the present field should know that the present invention can be embodied by other ways detached from these specific details. Furthermore, in order not to blur the present invention, the unnecessary details of known functions and structures are omitted in the current description. The present disclosure will make a further detailed description by combining with the attached figures. 
         [0082]    As illustrated in  FIG. 1  to  FIG. 3 , the present disclosure provides a kind of limiting plate control mechanism which comprises the first shell  101 , second shell  102 , sliding body  103 , first contact body, second contact body, flexible joint. The first shell  101  and second shell  102  combine into the cavity shell. The sliding body  103 , first contact body and second contact body are all located in the cavity shell. The sliding body  103  can slide in the cavity shell. The first contact body connects with the sliding body  103 . The second contact body connects with the inner surface of the cavity shell; the flexible joint bypasses the first contact body and second contact body, and two ends of the flexible joint stretch out of the cavity shell; when the cavity shell moves along the flexible joint, the displacement of the flexible joint does not be caused; when the first contact body sliding compresses the flexible joint, one end of the flexible joint will retract inward the cavity shell. 
         [0083]    Optionally, the first contact body is the first pulley  104 , and the second connect body is the second pulley  105 . The flexible joint is the wire rope  106 . The first pulley  104  is set on the sliding body  103 , and the first pulley  104  can make fixed-point rotation on the sliding body  103 . The second pulley  105  is set on the inner surface of the cavity shell, and the second pulley  105  can make fixed-point rotation on the inner surface of the cavity shell. 
         [0084]    As an embodiment, this limiting plate control mechanism also includes the first pulley core  116  and second pulley core  117 . This first pulley core is installed on the sliding body  103 , and the first pulley  104  is sheathed on the first pulley core  116  to rotate. The second pulley core  117  is installed on the inner surface of the cavity shell, and the second pulley  105  is sheathed the second pulley core  117  to rotate. 
         [0085]    This limiting plate control mechanism also comprises a sliding body spring  107  which can reset the sliding body  103 . One end of the sliding body spring is pressed against the sliding body  103 , and the other end of the sliding body spring  107  is pressed against the inner surface of the cavity shell. 
         [0086]    The end part of the wire rope  106  penetrates into one end of the cavity shell, bypasses the bottom of the first pulley  104  and the top of the second pulley  105  in succession, and penetrates out of the other end of the cavity shell. 
         [0087]    The plastic bar  118  is installed on the exterior surface of the cavity shell. 
         [0088]    As illustrated in  FIG. 4  to  FIG. 8 ,  FIG. 15  to  FIG. 23 , the present disclosure also provide a kind of scooter luggage equipped with the limiting plate control mechanism, including the first link rod  201 , limiting plate  1000 , scooter body  300 , luggage  400 ; the scooter body  300  comprises the slide plate  500  and scooter frame  600  that connect with each other, and are able to open and fold. The luggage  400  is installed on the frame  600 ; the first link rod  201  connects with the sliding body  103 ; one end of the flexible joint connects with the limiting plate  1000 ; the other end of the sliding body spring flexible body connects with the frame  600 ; the limiting plate  1000  is used to limit the folding and unfolding of the slide plate  500  and frame  600 . 
         [0089]    This scooter luggage also comprises a slider  108 . The slider  108  is provided with convex column  109 . The slider  108  is located in the cavity shell; the cavity shell is provided with Hole  110  allowing the convex column  109  to extend and retract; the slider  108  is located in the cavity shell. This scooter luggage also comprises the driving mechanism allowing the slider  108  to transversely slide in the cavity shell. The transverse direction is the direction from the first shell  101  to the second shell  102 . 
         [0090]    This scooter luggage also comprises the second link  202  rod. The driving mechanism comprises the pressing block  111 , slider spring  112 . The slider groove  113  is set on the inner surface of the cavity shell; the slider  108  is located in the slider groove  113 ; the slider spring  112  is located between the slider  108  and the inner surface of the slider groove  113 , and the slider spring  112  is contacted respectively with the slider  108  and inner surface of the slider groove  113 ; the convex column  109  sticks out of the hole  110 ; the second link rod  202  is connected with the pressing block  111 ; the pressing block  111  is located in the cavity shell, and the pressing block  111  is able to longitudinally slide along the cavity shell. The pressing block  111  is provided with pressing block inclined surface  114 ; the slider  108  is provided with slide inclined surface  115 ; the pressing block inclined surface  114  is pressed above the slider inclined surface  115 . 
         [0091]    This slider spring  112  gives a constant elastic force to slider  108 , thereby making convex column  109  on slider  108  stretch out of hole  110 . Pressing block  111  slides down and squeezes slider  108 , which makes slider  108  retract inward the cavity shell, thereby making convex  109  retract back into the cavity shell. 
         [0092]    The frame  600  comprises the tie rod inner tube  601 , tie rod exterior tube  602 , angle seat  603 , handle  604 , first button  605 , second button  606 , and limiting plate spring  607 . The cavity shell, first link rod  201  and second link rod  202  are all located in the tie rod inner tube  601 ; the first link rod  201  and second link rod  202  can move inside of the tie rod inner tube  601 . The cavity shell is fixed to connect within the tie rod inner tube  601 . The tie rod inner tube  601  is provided with the tie rod inner tube hole  608 . The convex column  109  sticks out of the tie rod inner tube hole  608 . The first button  605  is connected with the first link rod  201 , and the second button  606  is connected with the second link rod  202 . The second button  606  is provided with the installation hole  611 ; the first button  605  is located in the installation hole  611 ; the second button  606  is installed at the end part of the of the tie rod inner tube  601 ; the handle  604  is installed on the end part of the tie rod inner tube  601 ; the tie rod inner tube  601  is located inside the tie rod exterior tube  602 , and the tie rod inner tube  601  is able to move within the tie rod exterior tube  602 . The tie rod exterior tube  602  is provided with several tie rod exterior tube hole  609   s  where the convex column  109   s  are stretched out. The tie rod exterior tube  602  is connected with the angle seat  603 , and the angle seat  603  is provided with open slot  610 . The limiting plate  1000  is located in the open slot  610 ; one end of the limiting plate spring  607  is pressed against the open slot  601 ; the other end of the limiting plate spring  607  is pressed against the root part of the limiting plate  1000 ; the wire rope  106  is located in the tie rod inner tube  601 ; the other end of wire rope  106  is fixedly connected with the tie rod exterior tube  602 ; the slide plate  500  is provided with angle head  501 , and the angle head  501  forms a flexible connection with the angle seat  603 ; the angle head  501  is provided with at least two limiting slot  502   s  in which the limiting plate  1000  can be embedded. 
         [0093]    The tie rod plug  612  is installed on the end part of the tie rod exterior tube  602 , which is located within the tie rod exterior tube  602 . The other end of the wire rope  196  is fixed to the second wire rope fixing flap  613 . The second wire rope fixing flap  613  is fixed on the tie rod exterior tube  602  via the first wire rope fixing flap  614 . 
         [0094]    The angle seat  603  is provided with angle seat hole  615 . The angle head  501  is provided with angle head hole  513 . The angle seat hole  615  is aligned with angle head hole  513 . The large bolt  614  penetrates into the angle head hole  513  and angle seat hole  615 , making angle seat  603  to rotate around the large bolt  614  as the axis so as to enable the tie rod exterior tube  602  and peddle support  506  to open or fold together. The lock cover  615  is fastened on the angle head  501 . 
         [0095]    The slide plate  500  comprises the front axle  503 , front wheel  504 , front fork  505 , peddle support  506 , rear wheel  507 , fork crown cover  524 . The fork crown cover  524  is rotationally fixed to the angle head  501 . The front fork  505  is connected with the front axle  503 ; the fork crown cover  524  is rotationally connected with the front fork; the angle head  501  is provided with connection sheet  508  which is connected with the front axle  503 . There are two front wheel  504   s  which are respectively installed on both ends of the front axle  503 . The front end of the paddle support  506  is connected with the fork crown cover  524 ; the tail end of the paddle support  506  is equipped with the rear wheel  507 . 
         [0096]    Upper gasket  513  and upper bearing  514  are installed between the fork crown cover  524  and angle head  501 , thereby achieving the rotating connection of the fork crown cover  524  with the angle head  501 . Lower gasket  515  and lower bearing  516  are installed between the fork crown cover  524  and front fork  505 , thereby achieving the rotating connection of the fork crown cover  524  with the front fork  505 . Therefore the purpose of making the fork crown cover  524  to change directions can be achieved. 
         [0097]    The front fork  505  and connector  508  are fixed on the front fork  505  by front fork limiting part  517 . The tail end of the paddle support  506  is equipped with rear wheel fork  518 , on which the rear wheel  507  is installed by bearing  519  and small bolt  520 . 
         [0098]    This scooter luggage also includes braking mechanism which is used to accomplish the brake of the rear wheel  507 . The braking mechanism is consisted of the brake block  521 , rubber pad  522  and brake cover  523 . 
         [0099]    The front axle  503  is provided with the first guide wheel  509  and second guide wheel  510 . The fork crown cover  524  is provided with the first supporting inclined surface  511  and second supporting inclined surface  512 . The front fork  505  is located between the first guide wheel  509  and the second guide wheel  510 ; the first guide wheel  509  is contacted with the first supporting inclined surface  511 , and the second guide wheel  510  is contacted with the second supporting inclined surface  512 . 
         [0100]    The first supporting inclined surface  511  has the same structure with the second supporting inclined surface  512 . The structure from the root part of the first supporting inclined surface  511  to the end part of it is from thin to thick. The structure from the root part of the second supporting inclined surface  512  to the end part of it is from thin to thick as well. The root part of the first supporting inclined surface  511  is connected with the fork crown cover  524 , and the root part of the second supporting inclined surface  512  is connected with the fork crown cover  524 . 
         [0101]    As the slide plate  500  steers, the steering will be effected due to the existence of the luggage  400 . For example, when it steers left, the luggage will be offset to the right, which affects the user to turn left. In order to solve this problem, according to an embodiment, the structures of the first guide wheel  509 , second guide wheel  510 , first supporting inclined surface  511  and second supporting inclined surface  512  have been designed. 
         [0102]    As illustrated in  FIG. 9  to  FIG. 11 , when the scooter luggage turns left, the first guide wheel  509  contacts with the thick surface of the first supporting inclined surface  511 , and the second guide wheel  510  contacts with the thin surface of the second supporting inclined surface  512 , thereby making the center of gravity of the slide plate  500  incline to the left, which can help the scooter luggage turn left. 
         [0103]    As illustrated in  FIG. 12  to  FIG. 14 , when the scooter luggage turns right, the first guide wheel  509  contacts with the thin surface of the first supporting inclined surface  511 , and the second guide wheel  510  contacts with the thick surface of the second supporting inclined surface  512 , thereby making the center of gravity of the slide plate  500  incline to the right, which can help the scooter luggage turn right. 
         [0104]    According to an embodiment, the first button shell  701  and the second button shell  702  are also included. The first button shell  701  and the second button shell  702  are consisted of button shell which is sheathed on the end of the tie rod inner tube  601 . The second button  606  is installed in the button shell, and it can slide within the button shell. 
         [0105]    When used, the scooter luggage is able to change directions. When the first button  605  is pushed, the pressing block  111  presses the slider  108 , and thereby make the convex column  109  retract back into the cavity shell, so the inner tube of the expansion tie rod can be pulled. When the first button  605  is released, the convex column  109  sticks out of the hole  110  again in the function of the slider spring  112 . Meanwhile, the convex column  109  sticks out of the tie rod inner tube hole  608 , and it inserts into the tie rod exterior tube  609  to fix position. When the tie rod inner tube  601  is pulled to move in the tie rod exterior tube  602 , the wire rope  106  has no displacement. The cavity shell slide up and down along the wire rope  106 , and the first pulley  104  and the second pulley  105  can make fixed-point rotations to decrease friction. When the second button  606  is pushed, the first pulley  104  on the sliding body  103  slide down to press the wire rope  106 , and thereby causes a displacement of one end of the wire rope  106 , driving the limiting plate  1000  to retract inward the open slot  610 , and detaching the limiting plate  100  from the limiting slot  502 . Therefore, the tie rod exterior tube  602  can act freely. 
         [0106]    When the second button  606  is released, the limiting plate  100  enabled the limiting plate  1000  to pop up from the open slot  610  in the function of the limiting plate spring  607 , and it can enter the limiting slot  502  in open slot  610  to achieve the unfolding of the slide plate  500  and frame  600 . Certainly, the limiting plate  1000  can enter the other limiting slot  502  in open slot  610  to achieve the unfolding of the slide plate  500  and frame  600 . When the limiting plate  1000  enters the limiting slot  502 , one part of it is located in the open slot  610 , and the other part is located in the limiting slot  502 , thereby serving as a function of limiting connection. 
         [0107]    As illustrated in  FIG. 24  to  FIG. 26 , the present disclosure also provides a kind of button shell that includes the split frame. The split frame is provided with the first baffle  703  and second baffle  704 . The first baffle  703  is provided with the limiting protrusion  705 , and the second baffle  704  is provided with the limiting groove  706 . The there is a clearance between the first baffle  703  and second baffle  704 . The split frame comprises the first split frame  701  and second split frame  702 . The first split frame  701  has the same structure with the second split frame  702 ; the limiting protrusion  705  of the first split frame  701  is embedded into the limiting groove  706  of the second split frame  702 , forming the first supporting plate  707 ; the limiting protrusion  705  of the second split frame  702  is embedded into the limiting groove  706  of the first split frame  701 , forming the second supporting plate  708 . The button shell  700  comprises the spatial accommodation constituted by the clearance between the first supporting plate  707  and second supporting plate  708 , which is provided with button limiting slot  710 . 
         [0108]    The first baffle  703  and second baffle  704  of the split frame are equipped with button limiting slot  710 . The split frame is provided with the third baffle  711 . The first baffle  703  and second baffle  704  are respectively connected with the third baffle  711  which is equipped with the baffle hole  712 . 
         [0109]    As illustrated in  FIG. 27  to  FIG. 30 , the second button  606  comprises the arc connector  6061  and embedded bolt part  6062  interlinked with the arc connector  6061 . The inner surface of the arc connector  6061  is provided with the limiting bump  6063 . The embedded bolt part  6062  is located in the accommodation space  709 , which can slide up and down within this accommodation space  709 . The limiting bump  6063  is located in the button limiting slot  710 . 
         [0110]    As illustrated in  FIG. 31  to  FIG. 33 , the present disclosure also provides a kind of limiting plate control device, including the first shell  1101 , second shell  1102 , sliding pressing block  1103 , first slider  1104 , second slider  1105 , first elastic element, second elastic element. The first shell  1101  and second shell  1102  composes the cavity shell  1106 ; the sliding pressing block  1103 , first slider  1104 , second slider  1105 , first elastic element and second elastic element are all located in the cavity shell  1106 ; the sliding pressing block  1103  can move longitudinally along the cavity shell  1106 ; the first slider  1104  and second slider can slide transversely along the cavity shell  1106 . The longitudinal direction refers to the direction from the end part of the cavity shell  1106  to the root part  1062  of it; the transverse direction refers to the direction from the first shell  1101  to second shell  1102 . The first slider limiting slot and second slider limiting slot are installed in the cavity shell  1106 ; the first slider  1104  is located in the first slider limiting slot, and the second slider  1105  is located in the second slider limiting slot. The first shell  1101  is provided with the first shell hole  1011 ; the first slider  1104  is provided with the first slider protrusion  1041 , and the second slider  1105  is provided with the second slider protrusion  1051 ; the second shell  1102  is provided with the second shell hole  1021 . The first elastic element is pressed against the first slider  1104 , making the first slider protrusion  1104  stick out of the first shell hole  1011 . The second elastic element is pressed against the second slider  1105 , making the second slider protrusion  1051  be located in the cavity shell  1106 . The first slider protrusion  1041  is in clearance fit with the first shell hole  1011 , and the second slider protrusion  1051  is in clearance fit with the second shell hole  1021 . The first slider  1104  and second slider  1105  are longitudinally placed in succession in the cavity shell  1106 . This limiting plate control device comprises extrusion mechanism which comprises the first extrusion part  1031  and second extrusion part  1032  connecting with the sliding pressing block  1103 . The extrusion mechanism is used to achieve that: when pushing down the sliding pressing block  1103 , the first extrusion part  1031  squeezes the first slider  1104 , making the first slider protrusion  1041  retract back into the cavity shell  1106 , and the second extrusion part  1032  doesn&#39;t squeeze the second slider  1105  and continue pushing down the sliding pressing block  1103  to make the second extrusion part  1032  squeeze the second slider  1105 , making the second slider protrusion  1051  retract back into the cavity shell  1106 . 
         [0111]    The sliding pressing block  1103  comprises the sliding element  1035  composed by the first connector  1033  and second connector  1034 . The sliding element  1035  is of the shape of N. The number of the first extrusion part  1031  is two, and that of the second extrusion part  1032  is two as well. One first extrusion part  1033  and one second extrusion part  1032  are successively set up in the inner side surface of the first connector  1033 , and the other first extrusion part  1031  and the other second extrusion part  1032  are successively set up in the inner side surface of the second connector  1034 . The first shell  1101  is provided with the first split slot  1012 , and the second shell  1102  is provided with the first split chamber  1022 . The first split slot  1012  and first split chamber  1022  are fastened, composing the first slider limiting slot. The mentioned first shell hole  1011  is located in the first split slot  1012 ; the first shell  1101  is provided with the second split slot  1013 , and the second shell  1102  is provided with the second split chamber  1023 . The second split slot  1013  and second chamber  1023  are fastened, composing the second slider limiting slot. The second shell hole  1021  is located within the second split chamber  1023 ; the first slider limiting slot and second slider limiting slot are all located within the open space of the sliding element  1035 . 
         [0112]    The first slider  1104  is provided with two first slope  1042   s , and the second slider  1105  is provided with two second slope  1052   s . Two extrusion part  1031   s  are respectively provided with the first inclined surfaces used to coordinate respectively with the two first slope  1042   s . Two second extrusion part  1032   s  are respectively provided with the second inclined surface  1052   s  used to coordinate respectively with the two second slopes. 
         [0113]    The first elastic element is the first spring  1107 , and the second elastic element is the second spring  1108 . The sliding pressing block  1103  is provided with the extending part  1109  connected with the sliding element  1035 , which is provided with longitudinal chute  1110 . The inner surface of the end part of the cavity shell  1061  is equipped with the transverse chute  1111 . This limiting plate control device also comprises the steel ball  1112  and the third spring  1113 . The extending part  1109  sticks out of the end part of the cavity shell  1061 . The steel ball  1112  and third spring  1113  are all located in the transverse chute  1111 . The third spring  1113  squeezes the steel ball  1112  into the longitudinal chute  1110 , and the steel ball  1112  can roll within the longitudinal chute  1110  and transverse chute  1111 . 
         [0114]    As illustrated in  FIG. 34 , combining with  FIG. 5  to  FIG. 8 ,  FIG. 15  to  FIG. 20 , the present disclosure also provides a kind of scooter luggage equipped with the limiting plate control mechanism, including the link rod  201 , limiting plate  202 , scooter body  300  and luggage  400 . The scooter body  300  comprises the slide plate  500  and frame  600  that connect with each other, and are able to open and fold. The luggage  400  is installed on the frame  600 ; the link rod  201  is connected with the sliding pressing block  103 . The scooter frame  600  comprises the tie rod inner tube  601 , tie rod exterior tube  602 , tie line  616  and tension sheet  613 . The cavity shell  1106  and link rod  201  are all located in the tie rod inner tube  601 . The link rod  201  can move within the tie rod inner tube  601 . The cavity shell is fixed into the tie rod inner tube  601  which is provided with the tie rod inner tube hole  608 . The first slider protrusion  1041  sticks out of the tie rod inner tube hole  608 . The tie rod inner tube  601  is located in the tie rod exterior tube  602 , which can move in the tie rod exterior tube  602 . The tie rod exterior tube  602  is provided with several tie rod exterior tube hole  609   s  where the first slider protrusion  1041   s  can stretched out. The tension sheet  613  is located in the tie rod exterior tube  602 , which can move within the tie rod exterior tube  602 . It is also provided with the tension sheet hole  6131  in which the second slider protrusion  1051  can be embedded. One end of the tie line  616  is connected with the tension sheet  613 , and the other end of it is connected with the limiting plate  202  used to limit the folding and unfolding of the slide plate  500  and frame  600 . 
         [0115]    The frame  600  comprises the angle seat  603 , handle  604 , button  605  and limiting plate spring  607 . The button  605  is connected with the link rod  201 , which is installed on the end part of the tie rod inner tube  601 . The handle  604  is installed on the end part of the tie rod inner tube  601 . The tie rod exterior tube  602  is connected with the angle seat  603  which is provided with an open slot  610 . The limiting plate  202  is located in the open slot  610 . One end of the limiting plate spring  607  is pressed against the open slot  601  is pressed against the root part of the limiting plate  202 . The slide plate  500  is provided with an angle head  501  which forms a flexible connection with the angle seat  603 . The angle head  501  is provided with at least two limiting slot  502   s  in which the limiting plate  202  can be embedded. 
         [0116]    As for the technicians in present field, the present invention is obviously not limited to the details of the above-described demonstrative embodiments. Furthermore, the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. In addition, as for the technicians in present field, the above-mentioned embodiments can be combined and complemented on the premise of non-confliction, which comes within the protection scope of the present invention. Ant drawings in claims ought not to be regarded as the claim involved in the restriction. In addition, the term “include/comprise” does not rule out other units or procedures, and the singular does not rule out the plural.