CN103174044A - Fastening tool for line tail sleeve of bicycles and electric bicycles and electric assisting bicycles - Google Patents

Abstract

The invention discloses a fastening tool for a line tail sleeve of bicycles, electric bicycles and electric assisting bicycles. The fastening tool comprises a first operating handle, a second operating handle, a middle limiting piece, a group of fastening pieces, a first joint plate, a second joint plate, a regulation screw piece and a nut cap. A line tail sleeve which is sleeved on an end head of a steel rope is inserted into a third accommodating groove and a threaded groove of the middle limiting piece until the line tail sleeve is blocked by the regulation screw piece. The first operating handle and the second operating handle are operated to close up so as to enable fastening teeth of forming pieces of the fastening pieces to form incurvate joint concave spots in the outer circumference of the line tail sleeve, and consequently the line tail sleeve and the steel rope are in a fastening state. Through adjustment of advancing and retreating strokes of the regulation screw piece in the threaded groove, the depth of the line tail sleeve entering the accommodating groove and the threaded groove can be changed so as to adapt to accommodating of the line tail sleeves with different lengths. According to the fastening tool, a plurality of joint concave spots can be formed in the outer circumference of the line tail sleeve in one time, the processing procedures of fastening the steel rope and the line tail sleeve are simple and convenient, and the processing yield rate can be improved.

Description

The clamping tool of bicycle, electric bicycle and electrically assisted bicycle line tail cover

Technical field

The present invention relates to the clamping tool of a kind of bicycle, electric bicycle and electrically assisted bicycle line tail cover, be particularly related to a kind of can be disposable with the line tail cover excircle of cable wire fit on mold a plurality of places and engage and use concave point, make the urgent process phase shape of cable wire and line tail cover simple and easy, and can promote the clamping tool of bicycle, electric bicycle and the electrically assisted bicycle line tail cover of quality yield.

Background technology

Common on bicycle, electric bicycle, electrically assisted bicycle have a contexture that utilizes cable wire to make control action; example as the position of Brake car device or speed change gear with regard to common to utilizing cable wire to be used as operative, when pulling action bars from the operating side, will come the site of action in Dai Dong braking device or speed changer to change the position via the cable wire interlock, thus the effect of Da Cheng Brake car or speed change.The cable wire that uses forms by the multiply finer wire is stranded, so cable wire always has the termination and exposes when being intercepted suitable length and being used for assembling.And the phenomenon that finer wire scatters very easily appears in the termination of exposing, and therefore easily stabs approaching personage (may be rider or close person), and is very undesirable.

Therefore the inventor herein once invented a kind of automobile-used cable wire termination and end cap combined structure (the Taiwan patent No. is M388444); this scheme is a kind of end cap of design (i.e. " line tail cover " in this patent; also there is person to be " aluminium tail cover "); it has a tank; can overlap the termination of sharing automobile-used cable wire; the excircle of this end cap (line tail cover) is provided with the concave point that at least one place caves inward; this concave point dents into and then clamps cable wire, makes the combination that makes protectiveness between end cap (line tail cover) and cable wire termination.Wherein, the concave point that on this end cap (line tail cover) excircle, set at least one place caves inward, can be evenly distributed on the circumference of same aspect along end cap (line tail cover) excircle, or be distributed on different aspects, make cable wire and end cap (line tail cover) in conjunction with rear stressed evenly and more firm.Simple speech; this scheme is utilized an end cap (line tail cover) and cable wire fit; the concave point of the joint use that on online tail cover excircle, machine-shaping caves inward again makes end cap (line tail cover) make protectiveness with between cable wire and is combined, and stabs near the personage with the termination that prevents cable wire.

For overlapping the joint concave point that on the end cap (line tail cover) of sharing cable wire, machine-shaping goes out to cave inward, the early stage mode of carrying out is to utilize the instrument of pliers class with the flat next and cable wire clamping of line tail cartridge clip, its shortcoming is to be difficult for the application of force, and the clipping strength inequality to cable wire causes crudy unstable, and common phenomenon is to use soon that end cap (line tail cover) just breaks away from cable wire.It is that end cap (the line tail cover) level that cover is shared the cable wire termination is inserted in tool that a kind of mode is separately arranged, being operable to mould presses down and molds the first place (individual) concave point again, then the formation mould rising is left, the rotational line tail is set to the another location in tool simultaneously, being operable to mould presses down and molds the second place (individual) concave point again, if therefore on line tail cover excircle, (individual) concave point will be arranged everywhere, namely must repeatedly operate above-mentioned steps and just can complete.Its shortcoming is that operating process is complicated, and quality also is difficult to stablize, and causes fraction defective high.

Summary of the invention

In order to make up above deficiency, the invention provides the clamping tool of a kind of bicycle, electric bicycle and electrically assisted bicycle line tail cover, the clamping tool of this bicycle, electric bicycle and electrically assisted bicycle line tail cover can be on the line tail cover excircle that is linked in automobile-used cable wire termination once property mold many places and engage and use concave point, make the urgent process of cable wire and line tail cover easier, and can promote the processing yield.

the present invention for the technical scheme that solves its technical problem and adopt is: a kind of bicycle, the clamping tool of electric bicycle and electrically assisted bicycle line tail cover, comprise first, two levers, realizing middle limiting spare, one group urgent, first, two fish plates, adjust screw piece and nut cap, wherein, be fixed with a board slot group above the shank of this first lever, this board slot group is that an opening being formed by two plate bodys is towards the groove shape body of the second lever, this board slot group on two plate bodys all correspondence be provided with one first interstitial hole, at least two the first containing holes, two the first limiting holes, the first storage tank of two the first restriction arc grooves and an arc, each containing hole is positioned at around the first interstitial hole with identical oblique rake angle distribution, and also being provided with the first loose groove between the first containing hole and the first interstitial hole will both be communicated with, it is peripheral that two the first limiting holes are symmetrically set in the first containing hole, it is peripheral that two the first restriction arc grooves are symmetrically set in the first containing hole, and the first restriction arc groove and the first limiting holes are crisscross arranged, the first storage tank of arc is located at below the board slot group, in the first storage tank, a pleurapophysis is provided with one first and supports piece,

a plate body is connected above this second lever, this plate body can be planted in the opening of board slot group of the first lever, offer the second storage tank of one second interstitial hole, the second containing hole, two the second limiting holes, two the second restriction arc grooves and an arc on this plate body, the first corresponding setting in interstitial hole position of described the second interstitial hole and the first lever, the second containing hole is evenly distributed with the oblique rake angle in contrast to the containing hole of this first lever and is positioned at around this second interstitial hole, and also being provided with the second loose groove between the second containing hole and the second interstitial hole will both be communicated with, and the first containing hole quantity of the quantity of the second containing hole and the first lever identical and position is one, it is peripheral that two the second limiting holes symmetry are located at the second containing hole, it is peripheral that two the second restriction arc grooves are symmetrically set in the second containing hole, and the second restriction arc groove and the second limiting holes are crisscross arranged, wherein, the second limiting holes of the second lever is corresponding to the first restriction arc groove of the first lever, the second restriction arc groove of the second lever is corresponding to the first limiting holes of the first lever, the second storage tank of arc is located at below the plate body, in the second storage tank, a pleurapophysis is provided with one second and supports piece, the first storage tank position of this second storage tank and the first lever is corresponding, also be provided with one group of location quarter butt and an elastic strip, this group location quarter butt is planted respectively in the second limiting holes of the first restriction arc groove of the first lever and the second lever, elastic strip be located at the first lever and the second lever position corresponding first, in two storage tanks, first of the first lever and the second lever entangled respectively at the two ends of elastic strip, in two storage tanks first, two support piece,

Realizing middle limiting spare is comprised of a head and a threaded shank, and this head is planted in the space that is formed by the alignment of first and second interstitial hole, and this threaded shank passes first and second interstitial hole; Offer the 3rd storage tank longitudinally in the middle of the head of realizing middle limiting spare, the 3rd storage tank offers three groove corresponding with first and second groove of first and second containing hole to the periphery connection, offers a screw channel that communicates with the 3rd storage tank of this head in this threaded shank;

Urgent is comprised of a body, an alar part and a profiled member, the ora terminalis that deviates from alar part on body is shaped to the controlled edge of little sharp arcuation, alar part is tabular, profiled member sets out from the alar part extension, the front-end edge of profiled member forms the urgent tooth of at least one little sharp arcuation, the body correspondence is placed in first and second containing hole of first and second lever, and alar part and profiled member are placed in the 3rd groove of first and second groove of first and second lever and realizing middle limiting spare;

First and second fish plate fits in respectively board slot group two lateral surfaces, all offer first and second combination bore with the first corresponding applying of limiting holes of board slot group on first and second fish plate, also be provided with sub-assembly, sub-assembly is placed through in first and second combination bore the relative stationary positioned of first and second board; Fit in offer on the first fish plate of board slot group one side one with the first through hole of the 3rd corresponding applying of storage tank of realizing middle limiting spare, fit in the second through hole that offers an applying corresponding to the threaded shank of realizing middle limiting spare on the second fish plate of board slot group opposite side;

Adjust in the screw channel of threaded shank that the screw piece movable screw is connected to realizing middle limiting spare this adjustment screw piece stroke of can advancing and retreat in this screw channel; The threaded shank of nut cap and realizing middle limiting spare is spirally connected, to complete the assembling of clamping tool;

during use, insert from the first through hole of the first fish plate overlapping the line tail cover of sharing the cable wire termination, and enter in the screw channel of the 3rd storage tank of this realizing middle limiting spare and threaded shank, till screw piece stops until be adjusted, then firmly grasp first, the shank of two levers forces first of this first lever and the second lever, two containing holes are oblique becomes released state than far-end by original overlap condition, nearer end is become near state by original released state, so just inwardly promote mobile from the controlled edge place of body with urgent, make on the online tail cover of the urgent tooth of the profiled member excircle of urgent and mold recessed joint concave point, make line tail cover and cable wire both between the urgent state of formation.

Useful technique effect of the present invention is: when the present invention uses, adjust the advance and retreat stroke of this adjustment screw piece in the screw channel of threaded shank, just can change the line tail and cover into storage tank and the interior degree of depth of screw channel, be suitable for the line tail cover of different length, and then reach the effect of the accurate and effective control point of application (urgent) position, application of force of the present invention can make the feed simultaneously of urgent tooth multiple spot, has laborsaving, uniform force application, urgent respond well effect, process is simple, the processing yield is high, and the present invention is made of sturdy and durable unitary construction, and outward appearance has the coordination aesthetic feeling.

Description of drawings

Fig. 1 is stereogram of the present invention;

Fig. 2 is exploded view of the present invention;

Fig. 3 middle board slot group front view of the present invention;

Fig. 4 is the plate body front view of invention;

Fig. 5 is the realizing middle limiting spare and urgent three-dimensional exploded view of invention;

Fig. 6 is for hiding unused state front view after fish plate in invention;

Fig. 7 uses the state front view after hiding fish plate in invention;

Fig. 8 is operation principle schematic diagram of the present invention;

Fig. 9 is the first use state operation principle schematic diagram of the present invention;

Figure 10 is the second use state operation principle schematic diagram of the present invention.

The figure number explanation

1---clamping tool 10---the first lever

11---board slot group 111---interstitial hole

112---containing hole 1121---groove

113---limiting holes 114---restriction arc groove

115---storage tank 116---supports piece

117---elastic strip 20---the second lever

21---plate body 211---interstitial hole

212---containing hole 2121---groove

213---limiting holes 214---restriction arc groove

215---storage tank 216---supports piece

217---location quarter butt 30---realizing middle limiting spare

31---head 311---storage tank

312---groove 32---threaded shank

Urgent of 321---screw channel 40---

The controlled edge of 41---body 411---

42---alar part 43---profiled member

Urgent tooth 50---the first fish plate of 431---

500---the second board 51---combination bore

52---first through hole 53---the second through hole

54---screw rod 55---nut

60---adjusts screw piece 70---nut cap

The automobile-used cable wire B---of A---line tail cover

The specific embodiment

Embodiment: the clamping tool 1 of a kind of bicycle, electric bicycle and electrically assisted bicycle line tail cover, comprise that the first lever 10, the second lever 20, realizing middle limiting spare 30, one group urgent 40, first and second fish plate 50,500, one adjust screw piece 60 and a nut cap 70, be fixed with a board slot group 11 above the shank of this first lever 10, this board slot group 11 is that an opening being formed by two plate bodys is towards the groove shape body of the second lever 20, this board slot group 11 all offers hole corresponding to number of locations on two plate bodys, include: one first interstitial hole 111; At least two the first containing holes 112, the first containing hole 112 is positioned at around the first interstitial hole 111 with identical oblique rake angle distribution, and also being provided with the first loose groove 1121 between the first containing hole 112 and the first interstitial hole 111 will both be communicated with, and the present embodiment is take four containing holes 112 as example; Two the first limiting holes 113, the first limiting holes 113 symmetry are located at the first containing hole 112 peripheries; Two the first restriction arc groove 114, the first restriction arc groove 114 symmetry are located at the first containing hole 112 peripheries, and the first restriction arc groove 114 and the first limiting holes 113 are crisscross arranged; The first storage tank 115, the first storage tanks 115 of one arc are located at below, above-mentioned hole, and in the first storage tank 115, a pleurapophysis is provided with one first and supports piece 116;

The second lever 20 in shank on be fixed with a plate body 21, this plate body 21 can be planted in the opening of board slot group 11 of the first lever 20, offer on this plate body 21 with the board slot group on quantity and position corresponding hole, include: one second interstitial hole 211, its size is identical with aforementioned the first interstitial hole 111 with the position; At least two the second containing holes 212, the second containing hole 212 is evenly distributed with the same tilt angle and is positioned at around this second interstitial hole 211, and also being provided with the second loose groove 2121 between the second containing hole 212 and the second interstitial hole 211 will both be communicated with, and the present embodiment is take four the second containing holes 212 as example; Two second limiting holes 213, the second limiting holes 213 are symmetrically set in the second containing hole 212 peripheries; Two second restriction arc groove 214, the second restriction arc grooves 214 are symmetrically set in the second containing hole 212 peripheries, and the second restriction arc groove 214 and the second limiting holes 213 are crisscross arranged; The second storage tank 215, the second storage tanks 215 of one arc are located at below, above-mentioned hole, and in the second storage tank 215, a pleurapophysis is provided with one second and supports piece 216;

What must further illustrate is, the quantity of the second containing hole 212 must be identical with the first containing hole 112, when plate body 21 plant board slot group 11 interior after, the second containing hole 212 can be corresponding one by one with the first containing hole 112; And the incline direction opposite (in vertical state namely) of the incline direction of the second containing hole 212 and the first containing hole 112; The setting position of the second limiting holes 213 and the second restriction arc groove 214 is just opposite with the first limiting holes 113 and the first restriction arc groove 114, that is when plate body 21 plant board slot group 11 interior after, the second limiting holes 213 corresponds to the first restriction arc groove 114, the second restriction arc grooves 214 and corresponds to the first limiting holes 113;

in plate body 21 plants board slot group 11, make first, two interstitial holes 111, 211 positions are corresponding, and first, two containing holes 112, 212 is corresponding one to one, and the first limiting holes 113 corresponds to the second restriction arc groove 214, the first restriction arc groove 114 corresponds to the second limiting holes 213, while first, two storage tanks 115, 215 positions are at once, one group of location quarter butt 217 can be inserted respectively in the first restriction arc groove 114 and the second limiting holes 213, and an elastic strip 117 is pushed first, two storage tanks 115, in 215, make the two ends of elastic strip 117 entangle respectively first, two support piece 116, 216 and then with first, two levers fit together.

the internal diameter that is equivalent to (only being slightly less than) the second limiting holes 213 because of the bar footpath of location quarter butt 217, so after locating quarter butt 217 and the second limiting holes 213 closely being connected, can with confinement plate block 21 and board slot group 11 between the two range of deflection be limited in location quarter butt 217 and movably carry out in scope in angle in restriction arc groove 114, because being subjected to the elastic force extrapolation effect of this elastic strip 117, so have the tendency away from (opening) between this first lever 10 and both handle bodies of the second lever 20, and location quarter butt 217 and the second limiting holes 213 have the tendency of an end that moves to the first more close the first lever of restriction arc groove 114.

realizing middle limiting spare 30 is inserted in first and second interstitial hole 111,211 spaces that form, this realizing middle limiting spare 30 is comprised of a head 31 and a threaded shank 32, the external diameter of this head 31 is equivalent to (only being slightly less than) first, two interstitial holes 111, 211 internal diameter, offer the 3rd storage tank 311 longitudinally in the middle of head 31, the 3rd storage tank 311 offers and first to the periphery connection, two containing holes 112, 212 first, the 3rd groove 312 that two grooves are corresponding (in the present embodiment, the quantity of groove 312 is four), threaded shank 32 inwardly offers a screw channel 321 by an end that deviates from head 31, this screw channel 321 communicates with the 3rd storage tank 311, when realizing middle limiting spare 30 is inserted first, two interstitial holes 111, in the time of in 211 spaces that form, must suitably adjust angle, make the 3rd groove 312 correspond to one by one first, two containing holes 112, 212 first, two grooves 1121, 2121, this moment, the threaded shank 32 of realizing middle limiting spare 30 can pass the first interstitial hole 111,

In the space and first, second and third groove 1121,2121,312 that be placed in respectively first for urgent 40, containing hole 112,212 forms; This urgent 40 is comprised of a body 41, an alar part 42 and a profiled member 43, wherein, the ora terminalis that deviates from alar part 42 on body 41 is shaped to the controlled edge 411 of little sharp arcuation, alar part 42 is tabular, profiled member 43 sets out from alar part 42 extensions, its front-end edge is shaped to the urgent tooth 431 of little sharp arcuation, and the quantity of urgent tooth 431 is more than one; During assembling, body 41 is placed in first and second containing hole 112,212, and 43 of alar part 42 and profiled members are placed in first, second and third groove 1121,2121,312; First and second fish plate fits in respectively board slot group two lateral surfaces, all offer first and second combination bore with the first corresponding applying of limiting holes of board slot group on first and second fish plate, also be provided with sub-assembly, sub-assembly is placed through in first and second combination bore the relative stationary positioned of first and second board; Fit in offer on the first fish plate of board slot group one side one with the first through hole of the 3rd corresponding applying of storage tank of realizing middle limiting spare, fit in the second through hole that offers an applying corresponding to the threaded shank of realizing middle limiting spare on the second fish plate of board slot group opposite side;

First and second fish plate 50,500 fits in respectively 11 liang of lateral surfaces of board slot group, all offer on first and second fish plate 50,500 and equal first and second combination bore 51 of corresponding applying of the first limiting holes 113 size and location of board slot group 11, also be provided with sub-assembly, sub-assembly is placed through in first and second combination bore the relative stationary positioned of first and second board (this routine sub-assembly is screw rod 54 and nut 55); Fit in offer on the first fish plate 50 of board slot group one side one with the 3rd storage tank 311 size and location of realizing middle limiting spare 30 the first through hole 52 of corresponding applying all, fit in offer on the second fish plate 500 of board slot group opposite side one with threaded shank 32 size and location of realizing middle limiting spare 30 the second through hole 53 of corresponding applying all, threaded shank 32 can pass from the second through hole 53, one adjusts screw piece 60 is bolted in the screw channel 321 of threaded shank 32, and a nut cap 70 screws tight with this threaded shank 32 outsides.The present invention one is exclusively used in and molds some places on the line tail cover excircle of automobile-used cable wire termination fit and engage clamping tool 1 with concave point.

The present invention is because be subjected to the elastic force extrapolation effect of this elastic strip 117, have between this first lever 10 and both handle bodies of the second lever 20 and open (away from) tendency, and location quarter butt 217 and the second limiting holes 213 have the tendency that moves to more close the first lever one end of the first restriction arc groove 114.Because the incline direction of the second containing hole 212 is opposite with the incline direction of the first containing hole 112, therefore 112 pairs of the second containing hole 212 and the first containing holes are seasonable, because first and second containing hole 112,212 space overlap far away along inclined direction jointly holds and holds body 41, make alar part 42 and profiled member 43 all rest in first, second and third groove 1121,2121,312, namely the urgent tooth 431 of profiled member 43 is outside the scope of storage tank 311.

when the clamping tool 1 of the present embodiment uses, first of the hand-held clamping tool 1 of user one, the shank of two levers, another hand-held one group has been overlapped the line tail cover B that shares automobile-used cable wire A termination, then line tail cover B is planted from the first through hole 52 of the second fish plate 500, it is entered in the 3rd storage tank 311 and screw channel 321, until till being subject to this adjustment screw piece 60 and stopping, then use first of hand grip clamping tool 1, the shank of two levers makes it elasticity of compression bar 117 and towards to close up state close, in this process, the board slot group 11 of the plate body 21 of this second lever 20 and the first lever 10 both can be take realizing middle limiting spare 30 as the motionless center of circle, produce each other low-angle relative yaw motion, its relative motion meeting forces first, two containing holes 112, 212 along inclined direction spaces far away are separated because of yaw motion by original overlap condition, that the nearer end space is approached because of yaw motion by original released state on the contrary, its result can produce and inwardly promote each urgent 40 controlled edge 411 places from body 41 mobile, make on the online tail cover of the urgent tooth 431 of each profiled member of urgent 40 43 B excircle and mold the recessed joint concave point in a place, namely mold recessed joint concave point everywhere on tail cover B excircle online if therefore there be four urgent 40, make line tail cover and automobile-used cable wire form urgent (engaging closely) state between the two.After completing, as long as hand is decontroled the shank to first and second lever of clamping tool 1, the elastic force effect of opening due to elastic strip 117 namely can force the shank of first and second lever to be opened outward, and then make first and second containing hole 112,212 incline direction spaces far away again overlapping, and drive each urgent 40 and retreat return, the urgent tooth 431 of profiled member 43 is return outside the scope of the 3rd storage tank 311, and the line tail cover B (together with automobile-used cable wire A) that then can will complete urgent effect extracts (leaving) clamping tool 1 out.

Because the length of line tail cover B itself can be different, therefore line tail cover B plants from the first through hole 52 of the second fish plate 500 degree of depth that enters the 3rd storage tank 311 and screw channel 321 in sometimes must be darker, therefore namely produce the line tail and overlap the degree of depth that B enters and suitably to adjust.During use, adjusting screw piece 60 by rotation makes it withdraw from screw channel one segment distance, can hold long line tail cover B enters, and mold recessed joint everywhere with concave point (being to be molded on same aspect) on through online tail cover B excircle after above-mentioned urgent action, make line tail cover and automobile-used cable wire reach urgent (engaging closely) effect between the two.Then line tail cover B (together with automobile-used cable wire A) can be detached clamping tool 1.Perhaps line tail cover B first can not extracted out fully yet, and still keep one little section in storage tank 311, and then the shank of first and second lever of clamping tool 1 promptly, make the urgent tooth 431 of the profiled member 43 of urgent 40 before enter once again to mold on the online tail cover B excircle joint concave point of another aspect, so just can make line tail cover and automobile-used cable wire form the above urgent effect of two aspects between the two, more shape is tight to make its engagement state.

Claims (1)

1. bicycle, the clamping tool of electric bicycle and electrically assisted bicycle line tail cover, it is characterized in that: comprise first, two levers, realizing middle limiting spare, one group urgent, first, two fish plates, adjust screw piece and nut cap, wherein, be fixed with a board slot group above the shank of this first lever, this board slot group is that an opening being formed by two plate bodys is towards the groove shape body of the second lever, this board slot group on two plate bodys all correspondence be provided with one first interstitial hole, at least two the first containing holes, two the first limiting holes, the first storage tank of two the first restriction arc grooves and an arc, each containing hole is positioned at around the first interstitial hole with identical oblique rake angle distribution, and also being provided with the first loose groove between the first containing hole and the first interstitial hole will both be communicated with, it is peripheral that two the first limiting holes are symmetrically set in the first containing hole, it is peripheral that two the first restriction arc grooves are symmetrically set in the first containing hole, and the first restriction arc groove and the first limiting holes are crisscross arranged, the first storage tank of arc is located at below the board slot group, in the first storage tank, a pleurapophysis is provided with one first and supports piece

a plate body is connected above this second lever, this plate body can be planted in the opening of board slot group of the first lever, offer the second storage tank of one second interstitial hole, the second containing hole, two the second limiting holes, two the second restriction arc grooves and an arc on this plate body, the first corresponding setting in interstitial hole position of described the second interstitial hole and the first lever, the second containing hole is evenly distributed with the oblique rake angle in contrast to the containing hole of this first lever and is positioned at around this second interstitial hole, and also being provided with the second loose groove between the second containing hole and the second interstitial hole will both be communicated with, and the first containing hole quantity of the quantity of the second containing hole and the first lever identical and position is one, it is peripheral that two the second limiting holes symmetry are located at the second containing hole, it is peripheral that two the second restriction arc grooves are symmetrically set in the second containing hole, and the second restriction arc groove and the second limiting holes are crisscross arranged, wherein, the second limiting holes of the second lever is corresponding to the first restriction arc groove of the first lever, the second restriction arc groove of the second lever is corresponding to the first limiting holes of the first lever, the second storage tank of arc is located at below the plate body, in the second storage tank, a pleurapophysis is provided with one second and supports piece, the first storage tank position of this second storage tank and the first lever is corresponding, also be provided with one group of location quarter butt and an elastic strip, this group location quarter butt is planted respectively in the second limiting holes of the first restriction arc groove of the first lever and the second lever, elastic strip be located at the first lever and the second lever position corresponding first, in two storage tanks, first of the first lever and the second lever entangled respectively at the two ends of elastic strip, in two storage tanks first, two support piece,

Realizing middle limiting spare is comprised of a head and a threaded shank, and this head is planted in the space that is formed by the alignment of first and second interstitial hole, and this threaded shank passes first and second interstitial hole; Offer the 3rd storage tank longitudinally in the middle of the head of realizing middle limiting spare, the 3rd storage tank offers three groove corresponding with first and second groove of first and second containing hole to the periphery connection, offers a screw channel that communicates with the 3rd storage tank of this head in this threaded shank;

Urgent is comprised of a body, an alar part and a profiled member, the ora terminalis that deviates from alar part on body is shaped to the controlled edge of little sharp arcuation, alar part is tabular, profiled member sets out from the alar part extension, the front-end edge of profiled member forms the urgent tooth of at least one little sharp arcuation, the body correspondence is placed in first and second containing hole of first and second lever, and alar part and profiled member are placed in the 3rd groove of first and second groove of first and second lever and realizing middle limiting spare;

First and second fish plate fits in respectively board slot group two lateral surfaces, all offer first and second combination bore with the first corresponding applying of limiting holes of board slot group on first and second fish plate, also be provided with sub-assembly, sub-assembly is placed through in first and second combination bore the relative stationary positioned of first and second board; Fit in offer on the first fish plate of board slot group one side one with the first through hole of the 3rd corresponding applying of storage tank of realizing middle limiting spare, fit in the second through hole that offers an applying corresponding to the threaded shank of realizing middle limiting spare on the second fish plate of board slot group opposite side;

Adjust in the screw channel of threaded shank that the screw piece movable screw is connected to realizing middle limiting spare, the threaded shank of nut cap and realizing middle limiting spare is spirally connected.

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