CN200991529Y - Long, treavel-length pedal-plate device of elliptic-motion machine - Google Patents

Abstract

The utility model relates to a long distance pedal device used for the oval exercise machine, and comprises: a bottom bar , and a pin joint component is combined with the frond end of the bottom bar; a sliding block whose top is combined with the pedal is sliding inlaid between the bottom bar and the pin joint component; a slewing axis with the front and back gears and a pivot are respectively pivoted through the front and back positions of the back end of the bottom bar; a fixed axis with the driving gear is parallelly pivoted through between the font and back gears of the slewing axis; a jugged leather belt is sleeved between the front and back gears of the slewing axis; the outside of the jugged leather belt meshes the outside of the driving gear; a tow pulling plate is pivoted and connected at the slewing axis and a connecting plate is pivoted and connected at the sliding block. The utility model is characterized in that: the pin joint component and fixed bar are pivoted and connected between the pull bar and slewing structure of the oval exercise machine, thereby, when the fixed axis rotates circularly by the stepping on the pedal, the forward and backward displacements of the pedal can be drove by the contrarotation of the leather belt, increasing the movement distance of the pedal.

Description

The long stroke device with pedal of elliptical exercise machine

Technical field

The utility model relates to a kind of device with pedal of elliptical exercise machine, particularly relates to a kind of pedal travel that increases so that the longer stroke device with pedal of the elliptical exercise machine of the moving effect design of good speed to be provided.

Background technology

General elliptical exercise machine provides the function that pedal is stepped in user's circulation, reaches the effect of sport and body-building by this.Existing elliptical exercise machine such as Fig. 8, shown in Figure 9, it is to comprise a body 40, and arranged on left and right sides at body 40 front ends respectively is pivoted a confession user to pull the pull bar 41 that moving and forward and backward pivot swing is done, and but the form that is pivoted in the rear end of body 40 with rotation is pivoted one vertically disposed rotary configured 42, between the pull bar 41 of the front end of rotary configured 42 both sides and rear end and each side, articulate a connecting rod 43 respectively, at each connecting rod 43 top respectively in conjunction with a pedal 44.

When the user utilizes elliptical exercise machine, be to spur each pull bar 41 and trample each pedal 44 with pin with both hands, make of rotary configured 42 rotations of each pedal 44 by the rear end, produce the elliptic motion of circulation, reach the footstep body-building effect by this, yet because the pedal of existing elliptical exercise machine is to be fixed on each connecting rod 43, therefore the haul distance of pedal 44 front and back action is the diameter length according to rotary configured 42 rotational trajectories, therefore stroke is fixing can't change, and pedal 44 strokes that can increase by the structure design are also limited, the user can't be provided better movement effects, very unfortunate.

This shows that the pedal of above-mentioned existing elliptical exercise machine obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of pedal of novel elliptical exercise machine, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.

Because the defective that the pedal of above-mentioned existing elliptical exercise machine exists, the design people is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of pedal of novel elliptical exercise machine, can improve the pedal of general existing elliptical exercise machine, make it have more practicality.Through constantly research, design, and, create the utility model that has practical value finally through after studying sample and improvement repeatedly.

Summary of the invention

Since existing elliptical exercise machine pedal step on the stroke limiting diameter rotary configured in the rear end, therefore can't provide the user better movement effects, the utility model utilizes slide rail to cooperate the pedal that slides, and the technological means of the forward and backward displacement of gear cooperation pivot driving pedal, reach the creation purpose that increases the forward and backward shift motion of pedal by this.

The purpose of this utility model and to solve its technical problem be to adopt following technical scheme to realize.Long stroke device with pedal according to a kind of elliptical exercise machine that the utility model proposes, it is characterized in that: it is to comprise that retractable step structure and is pivoted to be incorporated into the pivot joint drag structure of this retractable step structure rearward end, wherein this retractable step structure is provided with a bottom bar, before this bottom bar is the edge, the rear to extend and at front end in conjunction with an articulated part, and before rearward end, back position respectively wears a protheca pore and a middle sleeve hole, set firmly an anterior cannula at this protheca pore, set firmly a middle sleeve in this middle sleeve hole, between the two ends of this bottom bar, be provided with a slide rail, this slide rail with can before, back slip form is embedded a slide block, at this slide block end face in conjunction with a pedal; This pivot joint drag structure is provided with a fixed axis, this fixed axis is to be through at this middle sleeve with an end pivot wherein, this fixed axis other end is to stretch out this middle sleeve and form one in conjunction with the end, in conjunction with the end near the inboard of this rear sleeve in conjunction with a driven wheel, be provided with a rotating shaft, this rotating shaft is that pivot is through at this anterior cannula and two ends pass this anterior cannula respectively, this rotating shaft in to a end that should driven wheel in conjunction with a front gear; The other end at this rotating shaft draws arm-tie in conjunction with one, articulate a joint cover in the outer end of this traction arm-tie, the outer end of this joint cover is articulated in the rearward end of this slide block, be provided with a backgear, but this backgear is the rearward end that is positioned at the rear of this driven wheel and is hubbed at this bottom bar with the rotation form, a sheathed odontoid belt between forward and backward gear, the outside of this driven wheel is meshed in the outside of this odontoid belt.

The purpose of this utility model and solve its technical problem and can also be able to be further achieved by the following technical measures.

The long stroke device with pedal of aforesaid elliptical exercise machine, wherein said bottom bar wears a rear sleeve hole at the rear in described middle sleeve hole, set firmly a rear sleeve in this rear sleeve hole, be provided with a pivot, this pivot be pivot be through at this rear sleeve and at an end of the described driven wheel of correspondence in conjunction with described backgear;

The long stroke device with pedal of aforesaid elliptical exercise machine, wherein said driven wheel are the lower position between described forward and backward gear, and this front gear, this backgear, and the diameter of this driven wheel and the number of teeth are identical.

The long stroke device with pedal of aforesaid elliptical exercise machine, wherein said slide rail is provided with a top board, this top board is incorporated into the end face of described bottom bar with the bottom and each is stretched down and establishes side plate at left and right edge, form a track plate curved relatively the stretching of the root edge of each side plate inwardly, each track plate is a recess arc long slab body up; Described slide block is provided with a upper plate, this upper plate is to be arranged at the top of this slide rail and on a left side, the left side of the corresponding slide rail in long edge of right both sides, vertically stretch down outside the right both sides and establish plate on one side, the root edge of each other plate is the root edge that is lower than each side plate, the root edge of each other plate respectively subtend stretch inwardly and establish a straddle, the interior ora terminalis of each straddle is to stretch to inboard also the stretching up of each siding track guidance tape to establish a wheel plate, each wheel plate is vertically to be provided with and to be positioned at slide rail, at each wheel plate before the other plate one side of homonymy, the back two ends pulley that respectively is pivoted, each pulley bottom is the track plate top surface that is resisted against this each side of slide rail, and described pedal is the upper plate that is incorporated into slide block.

The long stroke device with pedal of aforesaid elliptical exercise machine, wherein said slide rail is provided with a top board, this top board is incorporated into the end face of described bottom bar with the bottom and each is stretched down and establishes side plate at left and right edge, form a track plate curved relatively the stretching of the root edge of each side plate inwardly, each track plate is a recess arc long slab body up; Described slide block is provided with a upper plate, this upper plate is to be arranged at the top of this slide rail and on a left side, the left side of the corresponding slide rail in long edge of right both sides, vertically stretch down outside the right both sides and establish plate on one side, the root edge of each other plate is the root edge that is lower than each side plate, the root edge of each other plate respectively subtend stretch inwardly and establish a straddle, the interior ora terminalis of each straddle is to stretch to inboard also the stretching up of each siding track guidance tape to establish a wheel plate, each wheel plate is vertically to be provided with and to be positioned at slide rail, at each wheel plate before the other plate one side of homonymy, the back two ends pulley that respectively is pivoted, each pulley bottom is the track plate top surface that is resisted against this each side of slide rail, and described pedal is the upper plate that is incorporated into slide block.

The utility model compared with prior art has tangible advantage and beneficial effect.By technique scheme, the long stroke device with pedal of the utility model elliptical exercise machine has following advantage at least: this creation the utility model is to be installed in elliptical exercise machine to use, be articulated in the bottom of the pull bar of elliptical exercise machine during installing with articulated part, and be vertically located in the rotary configured of elliptical exercise machine in conjunction with the end with fixed axis.When using, the user circulates forward to step on pedal, this moment, fixed axis and set driven wheel can be along with rotary configured draw a picture circle and spinning movements forward, therefore fixed axis can bottom bar spinning movement forward relatively in middle sleeve, in course of action since driven wheel be the outside that is engaged in odontoid belt, therefore can drive odontoid belt spinning movement backward, make front gear and backgear together be driven rotation backward by odontoid belt, by this, front gear and rotating shaft interlock traction arm-tie rotate backward, and with traction before arm-tie draws joint cover in succession, back circulation pulling slide block, make slide block and pedal with respect to slide rail before, the back action.Because this creation the utility model makes rotary configured rotation trampling in the process once stepping on pedal, slide block and pedal can be by articulating drag structure forward and backward advance and retreat once, the stroke length that makes pedal is at rotary configured rotational trajectory diameter, reach the effect that increases the forward and backward shift motion distance of pedal, can provide the user better movement effects when being installed on elliptical exercise machine.

In sum, the utility model relates to a kind of long stroke device with pedal of elliptical exercise machine, it is to be provided with a bottom bar, bottom bar slides in conjunction with an articulated part and in the centre at front end and is embedded the slide block of a top in conjunction with pedal, bottom bar is before rearward end, back position is before pivot is equipped with respectively, a back-geared rotating shaft and a pivot, preceding, between the backgear and pivot wear a fixed axis that is provided with driven wheel, preceding, a sheathed odontoid belt between the backgear, this odontoid belt outside and the mesh driving gear outside are articulated in the joint cover of slide block at rotating shaft and the traction arm-tie and that is pivoted in succession; This creation the utility model with articulated part and fixed bar be articulated in elliptical exercise machine pull bar and rotary configured between, when stepping on pedal and make fixed axis draw circle to rotate, drive the forward and backward displacement of pedal by the odontoid belt reverse rotation, increase the stroke that pedal moves.The utlity model has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on apparatus structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and the device with pedal of more existing elliptical exercise machine has the outstanding effect of enhancement, thereby being suitable for practicality more, and having the extensive value of industry, really is a new and innovative, progressive, practical new design.

Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.

Description of drawings

Fig. 1 is the stereogram that the utility model preferred embodiment is installed in elliptical exercise machine.

Fig. 2 is the three-dimensional exploded view that the utility model preferred embodiment is installed in elliptical exercise machine.

Fig. 3 is the profile of the utility model preferred embodiment slide rail part.

Fig. 4 is the side view that the utility model preferred embodiment is installed in elliptical exercise machine.

Fig. 5,6, the 7th, the utility model preferred embodiment is installed in the enforcement action schematic diagram of elliptical exercise machine.

Fig. 8 is the stereogram of existing elliptical exercise machine.

Fig. 9 is the enforcement action schematic diagram of existing elliptical exercise machine.

10: retractable step structure 11: bottom bar

111: middle sleeve hole 112: the protheca pore

113: rear sleeve hole 114: anterior cannula

115: middle sleeve 116: rear sleeve

12: articulated part 121: the protheca pore

15: slide rail 151: top board

152: clamping plate 1521: the screw lock sheet

153: side plate 154: the track plate

155: base plate 16: slide block

161: upper plate 162: other plate

163: straddle 164: wheel plate

165: pulley 17: pedal

20: articulate drag structure 21: fixed axis

211: pivot is worn end 212: in conjunction with the end

213: driven wheel 22: rotating shaft

221: front gear 23: pivot

231: backgear 24: odontoid belt

25: traction arm-tie 26: the back pivoting articulation

27: joint cover 28: preceding pivoting articulation

30: elliptical exercise machine 31: pull bar

32: rotary configured 40: body

41: pull bar 42: rotary configured

43: connecting rod 44: pedal

The specific embodiment

For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to long its specific embodiment of stroke device with pedal, structure, feature and effect thereof according to the elliptical exercise machine that the utility model proposes, describe in detail as after.

The utility model is a kind of long stroke device with pedal of elliptical exercise machine, see also the preferred embodiment of Fig. 1 to Fig. 4, the utility model is to be installed in elliptical exercise machine 30 and to comprise retractable step structure 10, and one be pivoted and be incorporated into the pivot joint drag structure 20 that retractable step is constructed 10 rearward end, wherein:

Retractable step structure 10 is provided with a bottom bar 11, bottom bar 11 is the disposed upright rectangle straight-bar bodies that extend along front and rear direction, at bottom bar 11 front ends in conjunction with an articulated part 12, articulated part 12 is that section is that extend up on the plate and the top of ㄩ shape, pivot hole 121 before head portion wears one, bottom bar 11 wears a middle sleeve hole 111 in the centre of rearward end, and establishes at the apical margin of 111 forward and backward positions, middle sleeve hole and to wear a protheca pore 112 and a rear sleeve hole 113;

Place and solder bond one anterior cannula 114 at protheca pore 112, anterior cannula 114 is that pipe and its are axially vertical with the bearing of trend of bottom bar 11, place and solder bond one middle sleeve 115 in middle sleeve hole 111, middle sleeve 115 is that pipe and its are axially vertical with the bearing of trend of bottom bar 11, place in rear sleeve hole 113 and solder bond one rear sleeve 116, rear sleeve 116 is that pipe and its are axially vertical with the bearing of trend of bottom bar 11;

Be provided with a slide rail 15 in the front side of bottom bar 11, slide rail 15 is provided with a top board 151, top board 151 is that long edge front and rear direction is extended and horizontally disposed rectangle plate body, top board 151 also is incorporated into the end face of bottom bar 11 with the bottom, stretching clamping plate 152, two clamping plate 152 of establishing the twice interval down in top board 151 bottom center is respectively against the left and right side that is incorporated into bottom bar 11, by this, slide rail 15 be fixedly arranged on bottom bar 11, two clamping plate 152 root edges be stretch out bottom bar and respectively level towards the overhanging screw lock sheet 1521 of establishing;

Each is stretched down and establishes side plate 153 at the left and right long edge of top board 151, each side plate 153 root edge is to be higher than the root edge of each clamping plate 152 and to stretch formation one track plate 154 towards the direction of each clamping plate 152 toward interior bending respectively, each track plate 154 be recess up arc long slab body and inboard ora terminalis and each clamping plate 152 between have the interval, each screw lock of forward and backward position between two screw lock sheets 1521 is fixed in bottom bar 11 between each base plate 155 and the top board 151 in conjunction with a base plate 155 by this really;

Be provided with a slide block 16, slide block 16 is provided with a upper plate 161, upper plate 161 is to extend and horizontally disposed rectangle plate body along long limit front and rear direction, upper plate 161 is the tops that are arranged at slide rail 15, and outside the and arranged on left and right sides of the corresponding slide rail 15 in the long edge of and arranged on left and right sides, vertically stretch down and establish plate 162 on one side, the root edge of each other plate 162 is between the root edge and each screw lock sheet 1521 of each side plate 153;

The root edge of each other plate 162 respectively subtend stretch inwardly and establish a straddle 163, the interior ora terminalis of each straddle 163 is the intervals of stretching between each siding track guidance tape 154 and clamping plate 152, and stretch up and establish a wheel plate 164 that passes between each siding track guidance tape 154 and the clamping plate 152, before each wheel plate 164 is vertical setting and edge, the rear is to the microscler plate body that extends, at each wheel plate 164 before other plate 162 one sides of homonymy, the back two ends pulley 165 that respectively is pivoted, each pulley 165 bottom is the track plates 154 that are resisted against slide rail 15 each side, by this, slide block 16 with can before, back slip form is slided and is embedded at slide rail 15;

Be provided with a pedal 17, pedal 17 is the upper plates 161 that are incorporated into slide block 16.

Articulate drag structure 20 and be provided with a fixed axis 21, fixed axis 21 forms a pivot respectively at left and right side and wears end 211 and in conjunction with end 212, but and wear end 211 with pivot and be through at middle sleeve 115 with rotation form pivot, in conjunction with end 212 near the inboard of middle sleeve 115 right-hand members in conjunction with a driven wheel 213

Be provided with a rotating shaft 22, but the middle part of rotating shaft 22 is to be through at anterior cannula 114 with rotation form pivot, an and left side, right two ends pass anterior cannula 114 respectively, rotating shaft 22 at the right-hand member of corresponding driven wheel 213 in conjunction with a front gear 221, the diameter of front gear 221 and the number of teeth and driven wheel 213 are identical and be positioned at the upside in driven wheel 213 the place aheads, be provided with a pivot 23, but pivot 23 is to be through at rear sleeve 116 with rotation form pivot, and right two ends pass rear sleeve 116, in conjunction with a backgear 231, the diameter of backgear 231 and the number of teeth and driven wheel 213 are identical and be positioned at the upside at driven wheel 213 rears at the right-hand member of corresponding driven wheel 213 for pivot 23;

A sheathed odontoid belt 24 between front gear 221 and backgear 231, odontoid belt 24 and with the upside of the outside mesh driving gear 213 of bottom, by this, driven wheel 213 can utilize odontoid belt 24 together to drive forward and backward gear 221231 reverse rotations;

The left end that passes anterior cannula 114 at rotating shaft 22 draws arm-tie 25 in conjunction with one securely with not relatively turnable form, traction arm-tie 25 is straight-bar bodies and sets firmly in the outer end in conjunction with a back pivoting articulation 26, pivoting articulation 26 articulates a joint cover 27 later on, joint cover 27 be microscler plate body and before the outer end articulates one pivoting articulation 28, pivoting articulation 28 was fixedly arranged on the rearward end of the other plate 162 in pivoting articulation 26 left sides, back in the past, by this, joint cover 27 is articulated between traction arm-tie 25 and the slide block 16.

The above preferred embodiment is the form that the utility model is installed in the elliptical exercise machine left side.When the utility model was installed in the right side of elliptical exercise machine, the structure of its each several part was and the setting of preferred embodiment for symmetry, so do not given unnecessary details at this.

With the preferred embodiment is example, see also Fig. 1 to Fig. 4, when the utility model is installed in elliptical exercise machine 30, is the bottom that is articulated in pull bar 31 with the protheca pore 121 of articulated part 12, and is vertically located in the front part of elliptical exercise machine 30 rotary configured 32 in conjunction with end 212 with fixed axis 21.

When the utility model uses, please read Fig. 2,3, and Fig. 4 to Fig. 7, be to provide the user trample action forward with pedal 17, this moment, fixed axis 21 and set driven wheel 213 can be along with rotary configured 32 draw a picture circle and spinning movements forward, justify in the course of action with rotary configured 32 pictures that rotate at fixed axis 21 and driven wheel 213, because driven wheel 213 meeting spinning movements forward relatively in middle sleeve 115, therefore the driven wheel 213 that rotates forward can drive the odontoid belt 24 that is engaged in its outside and rotate backward, and because the diameter and the number of teeth of driven wheel 213 is all identical with front gear 221 and backgear 2 31, so driven wheel 213 rotates a circle forward with rotary configured 32 and will drive front gear 221 backward from turning around:

The reverse drive rotation that front gear 221 utilizes odontoid belt 24 to drive by above-mentioned driven wheel 213, and then driven rotary axle 22 rotates backward, and with before 25 rotations of traction arm-tie and the traction joint cover 27, back circulation pulling slide block 16, before making slide block 16 with respect to slide rail 15, the back action, so make rotary configured 32 rotations trampling in the process once in pushes pedals 17, slide block 16 and pedal 17 can before, the back advance and retreat once, by this, make the stroke of pedal 17 break through the diameter of rotary configured 32 rotational trajectories, before reaching growth pedal 17, the effect of back shift motion distance provides the user better movement effects.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art are not in breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims (5)

1, a kind of long stroke device with pedal of elliptical exercise machine is characterized in that: it is to comprise that retractable step structure and is pivoted to be incorporated into the pivot joint drag structure of this retractable step structure rearward end, wherein:

This retractable step structure is provided with a bottom bar, this bottom bar be along front and rear direction extend and at front end in conjunction with an articulated part, and respectively wear a protheca pore and a middle sleeve hole in the forward and backward position of rearward end, set firmly an anterior cannula at this protheca pore, set firmly a middle sleeve in this middle sleeve hole, between the two ends of this bottom bar, be provided with a slide rail, at this slide rail can forward and backward slip form being embedded a slide block, at this slide block end face in conjunction with a pedal;

This pivot joint drag structure is provided with a fixed axis, this fixed axis is to be through at this middle sleeve with an end pivot wherein, this fixed axis other end is to stretch out this middle sleeve and form one in conjunction with the end, in conjunction with the end near the inboard of this rear sleeve in conjunction with a driven wheel, be provided with a rotating shaft, this rotating shaft is that pivot is through at this anterior cannula and two ends pass this anterior cannula respectively, this rotating shaft in to a end that should driven wheel in conjunction with a front gear;

The other end at this rotating shaft draws arm-tie in conjunction with one, articulate a joint cover in the outer end of this traction arm-tie, the outer end of this joint cover is articulated in the rearward end of this slide block, be provided with a backgear, but this backgear is the rearward end that is positioned at the rear of this driven wheel and is hubbed at this bottom bar with the rotation form, a sheathed odontoid belt between forward and backward gear, the outside of this driven wheel is meshed in the outside of this odontoid belt.

2, the long stroke device with pedal of elliptical exercise machine according to claim 1, it is characterized in that wherein said bottom bar wears a rear sleeve hole at the rear in described middle sleeve hole, set firmly a rear sleeve in this rear sleeve hole, be provided with a pivot, this pivot be pivot be through at this rear sleeve and at an end of the described driven wheel of correspondence in conjunction with described backgear;

3, the long stroke device with pedal of elliptical exercise machine according to claim 1 and 2, it is characterized in that wherein said driven wheel is the lower position between described forward and backward gear, and this front gear, this backgear, and the diameter of this driven wheel and the number of teeth are identical.

4, the long stroke device with pedal of elliptical exercise machine according to claim 1 and 2, it is characterized in that wherein said slide rail is provided with a top board, this top board is incorporated into the end face of described bottom bar with the bottom and each is stretched down and establishes side plate at left and right edge, form a track plate curved relatively the stretching of the root edge of each side plate inwardly, each track plate is a recess arc long slab body up;

Described slide block is provided with a upper plate, this upper plate is to be arranged at the top of this slide rail and on a left side, the left side of the corresponding slide rail in long edge of right both sides, vertically stretch down outside the right both sides and establish plate on one side, the root edge of each other plate is the root edge that is lower than each side plate, the root edge of each other plate respectively subtend stretch inwardly and establish a straddle, the interior ora terminalis of each straddle is to stretch to inboard also the stretching up of each siding track guidance tape to establish a wheel plate, each wheel plate is vertically to be provided with and to be positioned at slide rail, at each wheel plate before the other plate one side of homonymy, the back two ends pulley that respectively is pivoted, each pulley bottom is the track plate top surface that is resisted against this each side of slide rail, and described pedal is the upper plate that is incorporated into slide block.

5, the long stroke device with pedal of elliptical exercise machine according to claim 3, it is characterized in that wherein said slide rail is provided with a top board, this top board is incorporated into the end face of described bottom bar with the bottom and each is stretched down and establishes side plate at left and right edge, form a track plate curved relatively the stretching of the root edge of each side plate inwardly, each track plate is a recess arc long slab body up;

Described slide block is provided with a upper plate, this upper plate is to be arranged at the top of this slide rail and on a left side, the left side of the corresponding slide rail in long edge of right both sides, vertically stretch down outside the right both sides and establish plate on one side, the root edge of each other plate is the root edge that is lower than each side plate, the root edge of each other plate respectively subtend stretch inwardly and establish a straddle, the interior ora terminalis of each straddle is to stretch to inboard also the stretching up of each siding track guidance tape to establish a wheel plate, each wheel plate is vertically to be provided with and to be positioned at slide rail, at each wheel plate before the other plate one side of homonymy, the back two ends pulley that respectively is pivoted, each pulley bottom is the track plate top surface that is resisted against this each side of slide rail, and described pedal is the upper plate that is incorporated into slide block.

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