CN208988435U - Tieback mounting device - Google Patents

Abstract

The utility model provides a kind of tieback mounting device, including box body, supporting structure, pressure handle and conveying member, and an accommodating chamber is formed in the box body, and two opposite end of box body offers the first opening and the second opening respectively；One end rotation of the pressure handle is connected on the box body, and the conveying member is connected with the other end for being placed in the pressure handle and is close in the second opening；The supporting structure is detachably inserted into accommodating chamber by first opening, the supporting structure is used to be hung on side by side thereon for multiple tiebacks, and an elastic force towards the conveying member is applied to multiple tiebacks, so that a tieback in the multiple tieback closest to the conveying member is pushed on the conveying member；When pressure handle rotation is to push the conveying member to slide, the tieback hung on the conveying member is pushed away into second opening.The utility model has the beneficial effect of safety when improving tieback installation effectiveness and installation.

Description

Tieback mounting device

Technical field

The utility model relates to curtain installing area, in particular to a kind of tieback mounting device.

Background technique

It in the prior art, is all to hold a pile tieback to be hooked to curtain one by one up when installing curtain.It is easy Hand is hurt by tieback, and it is more troublesome to operate, efficiency is very low.

Therefore, the prior art is defective, needs to improve.

Utility model content

The utility model embodiment provides a kind of tieback mounting device, can be promoted the installation effectiveness of tieback with And safety.

The utility model embodiment provides a kind of tieback mounting device, including box body, supporting structure, pressure handle and defeated Part is sent, an accommodating chamber is formed in the box body, two opposite end of box body offers the first opening and the second opening respectively；

One end rotation of the pressure handle is connected on the box body, and the conveying member is connected with the other end for being placed in the pressure handle And it is close in second opening；

The supporting structure is detachably inserted into the accommodating chamber by first opening, and the supporting structure is used It is hung on thereon side by side in for multiple tiebacks, and the elasticity towards the conveying member is applied to the multiple tieback Power a, so that tieback in the multiple tieback closest to the conveying member is pushed on the conveying member；

When the pressure handle rotation is to push the conveying member to slide, the tieback hung on the conveying member is pushed away Second opening.

In tieback mounting device described in the utility model, the conveying member includes one connecting with the pressure handle Conveying substrate and be set to the conveying substrate towards the portion that is affiliated in the box body one side, the portion of being affiliated to is used for for window Curtain is affiliated to thereon.

In tieback mounting device described in the utility model, the portion of being affiliated to is to be set on the conveying substrate The protrusion with tieback shape adaptation.

It further include the reset bullet for resetting the pressure handle in tieback mounting device described in the utility model Property part, one end of the return springs are connect with the box body, and the other end of the return springs is connect with the pressure handle.

In tieback mounting device described in the utility model, the box body includes upper housing and lower case, institute Upper housing is stated box is connect to form the box body with the lower case；

The lower case is provided with extension in one end of second opening；

The box body further includes a baffle, and the baffle connects and opposite with the conveying member with the extension.

In tieback mounting device described in the utility model, it is sliding that the second limit is provided on the inside of the baffle Slot, the side towards the baffle of the conveying substrate are provided with limit rib, and the limit rib can be along second limit Sliding slot is slidably contained in second limit sliding chutes.

In tieback mounting device described in the utility model, the supporting structure includes bracket, sliding block and One elastic component；

The bracket is used to be hung on side by side thereon for the multiple tieback, and the sliding block can be along the multiple curtain The orientation of hook is slidingly arranged on the bracket, and one end of first elastic component is connect with the bracket, described The other end of first elastic component is connected with the slide block.

In tieback mounting device described in the utility model, first elastic component is that sheet metal is curled into metal Volume, the metallic coil include scroll and free end, and the side backwards to second opening of the sliding block is provided with holding tank, The scroll is installed in the holding tank, the solid gap across the sliding block and the bracket in the free end and fixation It is connected on the one end of the bracket being open towards described second.

In tieback mounting device described in the utility model, retention bead is provided on the slider side wall；

The supporting structure further includes a positive stop hook, and the positive stop hook is pivotably coupled on the bracket, the limit Position hook is for rotating to predeterminated position to catch on the retention bead, to prevent the sliding block in the bullet of first elastic component It is slided under power effect towards the direction of second opening.

In tieback mounting device described in the utility model, guide channel, institute are provided on the inner wall of the box body That states positive stop hook is provided with drive shaft towards the guide channel on one side, when the supporting structure is inserted into the accommodating chamber, institute Drive shaft is stated into the guide channel；

When the supporting structure is inserted into first preset length of accommodating chamber, the guide channel will push the positive stop hook Rotation, so that the limited block be unlocked.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the tieback mounting device in the utility model embodiment.

Fig. 2 is another structural schematic diagram of the tieback mounting device in the utility model embodiment.

Fig. 3 is the decomposition texture schematic diagram of the box body in the utility model embodiment.

Fig. 4 is the partial structural diagram of the tieback mounting device in the utility model embodiment.

Fig. 5 is the structural schematic diagram of the bracket in the utility model embodiment.

Fig. 6 is the structural schematic diagram of the sliding block in the utility model embodiment.

Fig. 7 is the structural schematic diagram of the pressure handle in the utility model embodiment.

Fig. 8 is a kind of structural schematic diagram at visual angle of the conveying member in the utility model embodiment.

Fig. 9 is the structural schematic diagram at another visual angle of the conveying member in the utility model embodiment.

Specific embodiment

The embodiments of the present invention is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the utility model, and should not be understood as practical to this Novel limitation.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise " be based on the orientation or positional relationship shown in the drawings, be only for Convenient for description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have specifically Orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicates indicated technology The quantity of feature.Define " first " as a result, the feature of " second " can explicitly or implicitly include it is one or more The feature.The meaning of " plurality " is two or more in the description of the present invention, unless otherwise clearly specific It limits.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, it can also be in Between medium be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.

Following disclosure provides many different embodiments or example is used to realize the different structure of the utility model. In order to simplify the disclosure of the utility model, hereinafter the component of specific examples and setting are described.Certainly, they are only Example, and purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals And/or reference letter, this repetition are for purposes of simplicity and clarity, itself not indicate discussed various embodiments And/or the relationship between setting.In addition, the example of various specific techniques and material that the utility model provides, but this Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of other materials.

Referring to Fig. 1 and Fig. 2, the utility model embodiment provides a kind of tieback mounting device.The window Curtain hook mounting device includes box body 10, supporting structure 20, pressure handle 30, conveying member 40 and return springs (not shown go out).

Wherein, one end rotation of the pressure handle 30 is connected on the outer wall of the box body 10.The conveying member 40 is set to the pressure handle On 30 other end, and rotated with the rotation of the pressure handle 30.One end of the return springs is connect with pressure handle 30, the reset The other end of elastic component is connect with the box body 10.The supporting structure 20 is used to be hung on side by side thereon for multiple tiebacks 100, And an elastic force towards conveying member 40 is applied to multiple tieback 100, so that most being connect in multiple tiebacks 100 One tieback 100 of nearly conveying member is pushed on conveying member 40.When conveying member 40 is moved as pressure handle 30 rotates, it will hang over Tieback on conveying member 40 pushes away the box body 10.

Specifically, referring to Fig. 3, the box body 10 is substantially at hollow column structure.One is formed in the box body 10 Accommodating chamber, two opposite ends of the box body 10 are provided with the first opening 101 and the second opening 102.First opening 101 is used for It is inserted into for the supporting structure 20.The tieback 100 pushed away from the box body 10 by second opening 102.

Button bit 11 is provided on the lateral wall of the box body 10, which can be groove or through-hole, which is used for Cooperate supporting structure 20, with after supporting structure 20 is inserted into the box body 10 that supporting structure 20 is fixed.

The first axially extending limiting slot (not shown) along box body 10 is offered on the inner sidewall of the box body 10, this One limiting slot is for limiting supporting structure 20.

In some embodiments, the box body 10 include upper housing 10a, lower case 10b, upper housing 10a with 10b pairs of lower case Box connects to form box body 10.Upper housing 10a is provided with extension 12 in one end of the second opening 102；It is provided on extension 12 Baffle 13, baffle 13 and conveying member 40 are opposite.

One second elastic buckles 14 are additionally provided on the outside of upper housing 10a, second elastic buckles 14 are for the pressure handle 30 Limit.

The two opposite sides of the box body 10 are set there are two opposite mounting hole 103, which is used to supply the pressure handle 30 are rotatably attached.In the figure, each mounting hole 103 by upper housing 10a and lower case 10b half bore splicing and At.

Referring to figure 4., which includes bracket 21, the first elastic component 22, sliding block 23 and positive stop hook 24.Its In, which being axially slidably connected on the bracket 21 along the bracket 21.One end of first elastic component 22 with One end of the bracket 21 connects, and the other end of first elastic component 22 is connect with the sliding block 23, to apply one to the sliding block 23 A elastic force towards 40 direction of conveying member.The positive stop hook 24 rotation is connected on the bracket 21, when rotation to predeterminated position, The sliding block 23 is locked, in order to which tieback 100 is installed on the bracket 21 by user one by one.

Specifically, referring to figure 5., which includes rack body 211, stent substrate 212, the first elastic buckles 213.It should Rack body 211 and the first elastic buckles 213 are vertically installed on the stent substrate 212.

Shape of the shape of the stent substrate 212 substantially with first opening 101 is mutually adapted, and the stent substrate 212 Area be greater than this first opening 101, when the rack body 211 is fully inserted into the box body 10, which should The first opening 101 on box body 10 covers.

First elastic buckles 213 include elastic arm (not labeled) and overhead kick, one end of the elastic arm and the stent substrate 212 vertical connections, the overhead kick are connected to the other end of the elastic arm.When the rack body 211 is completely inserted into the box body When, the overhead kick of first elastic buckles 213 snaps onto the button bit 11 on the lateral wall of the box body 10, to avoid the supporting structure 20 rack body 211 is skidded off from the box body 10.

In some embodiments, it is additionally provided with a rotation axis 214 on the rack body 211, the rotation axis 214 is for supplying The positive stop hook 24 is rotationally connected on the rack body 211.The rack body 211 includes the ennation of a strip and is set to Limit film 2112 on the ennation.Wherein, the longitudinal section of the ennation include first in 21a, second 21b, third side The 21e in 21d and the 5th of 21c, the 4th.This first while 21a be located at this second while 21b side, third side 21c be located at should The other side of second side 21b, this first while one end of 21a be vertically connected at this second while 21b midpoint, third side 21c One end be vertically connected at this second at one end of 21b and the third between the midpoint of 21c.The third side 21c and this Five when 21e is located at the 4th 21d two sides.The third when the other end of 21c is vertically connected at the 4th 21d Position between one end and midpoint, the first end of the May 4th 21d when one end of 21e is vertically connected at the 4th.This first In 21a, second, 21b, the third 21d and the 5th side 21e in 21c, the 4th extend along the direction perpendicular to the longitudinal section It is respectively formed the first rectangular slab, the second rectangular slab, third rectangular slab, the 4th rectangular slab and the 5th rectangular slab.First rectangle Plate, the second rectangular slab, third rectangular slab, the 4th rectangular slab and the 5th rectangular slab are connected to form the ennation.Wherein, this second Rectangular slab, third rectangular slab, the 4th rectangular slab surround a sliding slot 2111.First rectangular slab, the second rectangular-plate-shaped are at a T shape Sliding rail.

The limit film 2112 is vertical with the 5th rectangular slab to be connect, should when the rack body 211 is inserted into the box body 10 Limit film 2112 is connected in the first limiting slot of 10 inner wall of box body.

Fig. 6 is please referred to, which includes sliding part 231 and the first limiting section 232.First limiting section 232 socket On the sliding rail of the T shape, which is embedded in the sliding slot 2111.And the bottom of the sliding part 231 and the sliding slot 2111 Bottom wall between be provided with gap.First limiting section 232 can be slided along the sliding rail.The sliding part 231 can be along the sliding slot 2111 slidings, the axial direction of the sliding slot 2111 are parallel to each other with the axial direction of the sliding rail.

Referring to Fig. 4 and Fig. 6, holding tank 233 is arranged in the one side towards the stent substrate 212 of the sliding block 23, It that is to say that the side backwards to the second opening 102 of sliding block 23 is provided with holding tank 233.The holding tank 233 and, sliding part 231 Gap connection between bottom and the bottom wall of the sliding slot 2111.Retention bead 234 is provided in the side wall surface of the sliding block 23, it should Retention bead 234 is used to cooperate with positive stop hook 24, locks the sliding block 23 to realize.

Referring to Fig. 4 and Fig. 6, which is that sheet metal is curled into metallic coil.The metallic coil includes Scroll and free end, the scroll are installed in holding tank, and the solid gap across the sliding block and bracket in free end is simultaneously It is fixedly connected on one end of the second opening 102 of direction of rack body.In the present embodiment, the free end is followed closely using screw It connects on the bracket.

Referring to figure 4., which includes a linking arm and coupler body, and one end rotation of the linking arm is connected to the branch On frame ontology 211, which connect with the other end of the linking arm.When the linking arm is rotated to predetermined angle, which will The retention bead 234 is hooked, so that the sliding block 23 be locked, multiple tiebacks 100 is suspended to by user at leisure On the rack body 211.

Referring to figure 4., further, in some embodiments, a drive shaft 241 is also vertically installed on the linking arm. Accordingly, referring to figure 3., the lower casing of the box body 10 is provided with guide channel 11b on the inner wall of 10b, and guide channel 11b is by the box The end face of one end for being provided with first opening 101 of body 10 is run through.

When supporting structure 20 is initially inserted into the accommodating chamber of box body 10, drive shaft 241 enters guide channel 11b；When bracket knot When structure 20 is inserted into the first preset length of accommodating chamber, guide channel 11b will push drive shaft 241, so that positive stop hook 24 is driven to rotate, from And sliding block 23 is unlocked.

Specifically, guide channel 11b includes that vertical edge, bevel edge and be parallel to each other long side and short side, long side and short side are equal It is parallel to the axial direction of the box body 10, the long side and short side open the end face of the first opening 101 and are connected with being equipped with for the box body 10, this The length of vertical edge is less than the long side at a distance from short side, separate first opening 101 of one end and long side of vertical edge One end vertically connects, and the other end of the vertical edge is connect with one end of the bevel edge, and the other end of the bevel edge is separate with the short side One end connection of first opening.When the rack body 211 is initially inserted into the accommodating chamber of the box body 10, the drive shaft 241 End enters in guide channel 11b, and when the distance that the rack body 211 enters the accommodating chamber reaches the length of the short side, The bevel edge applies thrust to the drive shaft 241, so that the drive shaft 241 drives linking arm rotation, so that the coupler body is remote From the retention bead 234, the unlock of the sliding block 23 is realized, for the sliding block 23 under the elastic force effect of the first elastic component 22, pushing should Multiple tiebacks 100 are moved towards the conveying member 40.

The pressure handle 30 includes pressing plate 31, the first side wall 32, second sidewall 33, receiving cartridge 34, the first limited post 35 and the Two limited posts.The pressing plate 31 is substantially plate-like, and the longitudinal section of the pressing plate 31 is in slight curving arcuation.The pressing plate 31 includes two-phase Pair the first long side 311 and the second long side 312, two opposite first broadsides 313 and the second broadside 314.

The first side wall 32 is arranged and is located at the inside of the pressing plate 31,33 edge of second sidewall along first long side 311 Second long side 312 be arranged and be located at the pressing plate 31 inside.The distance between the first side wall 32 and second sidewall 33 are slightly Greater than the width of the box body 10.The pressing plate 31 offers the first notch 315 on first broadside 313.First notch 315 On the central axes of the pressing plate 31.It closes on first notch 315 and is additionally provided with first through hole 316.The first through hole 316 is substantially in It is round.Receiving cartridge 34 is along the week of the first through hole 316 along the outside for being arranged and being located at the pressing plate 31.The receiving cartridge 34 is for supplying One end of return springs is installed on wherein.

In the present embodiment, which is spring.One first spacer pin 317 is additionally provided in the receiving cartridge 34, The return springs that is to say that one end of spring is housed in the receiving cartridge 34 and is socketed on first spacer pin 317.It is corresponding Ground, corresponding position is provided with the second spacer pin 18 on the box body 10, which that is to say that the other end of spring is socketed in On second spacer pin 18.

The conveying member 40 includes conveying substrate 41, interconnecting piece 42 and the second limiting section 43.One end of the interconnecting piece 42 with The middle part of 41 side of conveying substrate connects, and the other end of the interconnecting piece 42 is vertical with the middle part of second limiting section 43 to be connect. The generally rectangular shaped plate of second limiting section 43 or cuboid strip.

Shape adaptation with tieback 100 is provided in one side towards second opening 102 of the conveying substrate 41 Be affiliated to portion 411, it is protrusion with the shape adaptation of tieback 100 that this, which is affiliated to portion 411,.The conveying member 40 backwards to this second Two limit ribs 44 are provided in the one side of opening 102, this two limit ribs 44 in parallel and are positioned apart from, and from the conveying base Plate 41 extends to second limiting section 43.

When the pressure handle 30, conveying member 40, box body 10 and return springs assemble, the conveying substrate 41 of the conveying member 40 is inserted Being provided between 102 one end of the second opening and the baffle 13 in the box body 10 is connect, and this two limit ribs 44 are slideably It is connected in the second limiting slot 131 of 13 inside of baffle.The pressure handle 30 passes through its first limited post 35 and the second limited post It is pivotably coupled on the box body 10, and using first limited post 35 and the second limited post as shaft.First limited post 35 and second limited post be plugged in the mounting hole of two opposite sides of box body 10 respectively.The interconnecting piece 42 of the conveying member 40 is plugged on In the notch 315 of the pressing plate 31.The both ends of second limiting section 43 of the conveying member 40 are connected to the notch of the pressing plate 31 respectively On the outer wall of 315 two opposite sides.The second elastic buckles 14 on the box body 10 pass through the notch 315 of the pressing plate 31, and snap onto this On the outer wall of pressing plate 10.The return springs that is to say that one end of spring is housed in the receiving cartridge 34 and is socketed in first limit On the pin 317 of position.The return springs that is to say on the second spacer pin 18 that the other end of spring is socketed on the box body 10, thus Realize the reset of the pressure handle 30 and conveying member 40.

When work, first by the button bit on the second elastic buckles 213 disengaging of the bracket 21 of the supporting structure 20 box body 10 11, then the rack body 211 of the supporting structure 20 is extracted from the box body 10.Then, the sliding block 23 is slided to be somebody's turn to do to close One end of stent substrate 212, and the positive stop hook 24 of the supporting structure 20 is rotated, so that the positive stop hook 24 hooks on the sliding block 23 Retention bead 234, which is lockked.Then, multiple tiebacks 100 are hung over the supporting structure 20 by user side by side On rack body 211, after tieback 100 overworks rack body 211, which is inserted into the receiving of the box body 10 In chamber, in insertion process, which rotates under the action of box body 10, so that the sliding block 23 is unlocked, so that the sliding block 23 Under the action of elastic force, the multiple tieback 100 of part pushes the conveying member 40 to, and in multiple tieback 100 most It is affiliated to being affiliated in portion 411 to 40 inside of the conveying member close to a tieback 100 of the conveying member 40, presses the pressure handle When 30, push the conveying member 40 that the tieback is pushed out the box body, so that the tieback being pushed out 100 is hooked to window On curtain.

In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the utility model.In this explanation In book, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.

Although above preferred embodiment is not used in conclusion the utility model is disclosed above with preferred embodiment To limit the utility model, those skilled in the art can make without departing from the spirit and scope of the utility model It is various to change and retouch, therefore the protection scope of the utility model subjects to the scope of the claims.

Claims (9)

1. a kind of tieback mounting device, which is characterized in that including box body, supporting structure, pressure handle and conveying member, the box It is formed with an accommodating chamber in vivo, two opposite end of box body offers the first opening and the second opening respectively；

One end rotation of the pressure handle is connected on the box body, and the conveying member is connected with the other end for being placed in the pressure handle and faces It is bordering on second opening；

The supporting structure is detachably inserted into the accommodating chamber by first opening, and the supporting structure is for supplying Multiple tiebacks are hung on thereon side by side, and apply an elastic force towards the conveying member to the multiple tieback, from And a tieback in the multiple tieback closest to the conveying member is pushed on the conveying member；

When the pressure handle rotation is to push the conveying member to slide, the tieback hung on the conveying member is pushed away described Second opening.

2. tieback mounting device according to claim 1, which is characterized in that the conveying member includes one and the pressure Handle connection conveying substrate and be set to the conveying substrate towards the portion that is affiliated in the box body one side, it is described to be affiliated to portion For being affiliated to thereon for tieback.

3. tieback mounting device according to claim 2, which is characterized in that the portion of being affiliated to is described defeated to be set to Send the protrusion with tieback shape adaptation on substrate.

4. tieback mounting device according to claim 2 or 3, which is characterized in that further include for by the pressure handle The return springs of reset, one end of the return springs are connect with the box body, the other end of the return springs with The pressure handle connection.

5. tieback mounting device according to claim 2 or 3, which is characterized in that the box body include upper housing with And lower case, the upper housing connect box to form the box body with the lower case；

The lower case is provided with extension in one end of second opening；

The box body further includes a baffle, and the baffle connects and opposite with the conveying member with the extension.

6. tieback mounting device according to claim 5, which is characterized in that be provided with second on the inside of the baffle Limit sliding chutes, the side towards the baffle of the conveying substrate are provided with limit rib, and the limit rib can be along described Two limit sliding chutes are slidably contained in second limit sliding chutes.

7. tieback mounting device according to claim 1, which is characterized in that the supporting structure includes bracket, cunning Block and the first elastic component；

The bracket is used to be hung on side by side thereon for the multiple tieback, and the sliding block can be along the multiple tieback Orientation be slidingly arranged on the bracket, one end of first elastic component is connect with the bracket, described first The other end of elastic component is connected with the slide block.

8. tieback mounting device according to claim 7, which is characterized in that first elastic component is sheet metal coil For song at metallic coil, the metallic coil includes scroll and free end, the side setting backwards to second opening of the sliding block There is holding tank, the scroll is installed in the holding tank, and the free end is solid across the sliding block and the bracket Gap is simultaneously fixedly connected on the one end of the bracket being open towards described second.

9. tieback mounting device according to claim 8, which is characterized in that be provided with limit on the slider side wall Protrusion；

The supporting structure further includes a positive stop hook, and the positive stop hook is pivotably coupled on the bracket, the positive stop hook For rotating to predeterminated position to catch on the retention bead, so that the sliding block be prevented to make in the elastic force of first elastic component It is slided with the lower direction towards second opening.