Self-locking device and curtain track mounting weight applying same

Abstract

The utility model provides a self-locking device and a curtain track installation code applying the self-locking device, and relates to the field of curtain track installation accessories. The curtain track mounting code is used for solving the technical problems that in the prior art, a curtain track mounting code does not have a self-locking function, and screws cannot be mounted in a screw hole in the foremost end of the top of a hidden top mounting code while a track is hooked, and comprises a hidden top mounting code, a hidden wall mounting code, an open mounting type top mounting code and an open mounting type wall mounting code. The installation code is composed of a support body, a movable block, a fixed block, an n-shaped stroke rod and a spring, the installation code is provided with a self-locking device, installation or disassembly of the track can be simply and rapidly completed, after the first hidden type top installation code is installed, the hooking part can hook the track to continue installation of the remaining hidden type top installation codes, and the installation efficiency is greatly improved. The inclined surface of the hooking part is attached to the hooking surface of the track and inclines at a large angle, the screw hole at the foremost end of the top of the mounting weight is completely exposed and is conveniently fixed by a screw, and the support surface on the mounting weight plays a blocking role, so that the track cannot fall off and slide out.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of curtain rail installation accessories, concretely relates to be used for curtain rail installation code. BACKGROUND

[0002] The curtain rail is used for hanging the curtain, and the curtain rail installation code is an important component of the curtain rail, which is used for fixing the curtain rail on the installation surface. In addition to the top-mounted code for fixing the rail to the top surface and the wall-mounted code for fixing the rail to the wall surface, there are also exposed-mounted codes and concealed-mounted codes. The exposed-mounted code can be seen protruding out of the rail from the front after the rail is installed, and the concealed-mounted code is almost invisible from the front after the rail is installed. The hooking surface of the curtain rail installation code in the prior art has a small effective surface and low bearing capacity. The curtain rail installation code in the prior art adopts a spring extrusion type without self-locking function. Before installing the rail, all the installation codes need to be fixed to the installation surface, and then the rail is installed by hanging the installation code clamping groove on one side of the rail into the hook at the rear end of the installation code, and then the rail is pressed upward until the installation code clamping groove on the other side of the rail is clamped into the rail bracket at the front end of the installation code. When disassembling the rail, one hand needs to press the pressing piece at the front end of the installation code to the bottom, and the other hand needs to hold the rail and bend it downward to make the installation code clamping groove on one end of the rail disengage from the installation code bracket. Until all the installation codes complete the above steps, the rail can be disassembled. The installation and disassembly process is not easy, and the rail is prone to deformation due to the above force. The concealed top-mounted code in the prior art is limited by its structure, and the screw hole at the front end of the top of the installation code cannot be installed with a screw while hooking the rail. After measuring the distance between all the installation codes with a ruler and fixing the installation codes with screws, the rail can be clamped into the concealed top-mounted code. Due to the error in the flatness of the installation surface, some installation codes need to be adjusted again. The installation steps are complicated, time-consuming and labor-consuming. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a self-locking device and a curtain rail installation code applying the self-locking device, which are used to solve the technical problems that the curtain rail installation code in the prior art has no self-locking function and the screw hole at the front end of the top of the concealed top-mounted code cannot be installed with a screw while hooking the rail.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The cam is fixed to the movable block through the movable block hanging ear and is fixed in the fixed block hanging ear fixing hole of the bracket body. The movable block is provided with a stroke rod insertion hole, the N-shaped stroke rod one end pin is inserted into the stroke rod insertion hole of the movable block, the fixed block is provided with a stroke rod travel groove, the other end pin of the N-shaped stroke rod is inserted into the stroke rod travel groove of the fixed block and does not contact the bottom of the travel groove, the connecting arm between the two pins of the N-shaped stroke rod remains suspended, the movable block and the fixed block are respectively provided with a spring groove with a notch, and the spring grooves with a notch of the movable block and the fixed block are bridged by a spring.

[0006] Furthermore, movable block ear travel holes and fixed block ear fixing holes are provided on both sides of the bracket body of the hidden top-mounted code, and movable block brackets extending inward are formed at the bottom of both sides of the bracket body respectively, and a movable block travel notch is provided at the top of one end of the bracket body close to the movable block ear travel hole, and a track hook portion with the width of the bracket body is formed at the bottom of one end of the bracket body close to the fixed block ear fixing hole.

[0007] Furthermore, the rear end of the track hook portion of the bracket body of the hidden top-mounted bracket is integrally formed and extends outward to form a hidden wall-mounted bracket body.

[0008] Furthermore, movable block ear travel holes and fixed block ear fixing holes are provided on both sides of the bracket body of the surface-mounted top-mounted code, and movable block brackets extending inward are formed at the bottom of both sides of the bracket body, and a rail hook portion is formed at the bottom of the front end of the top plate of the bracket body near one end of the movable block ear travel hole.

[0009] Furthermore, the rear end of the fixing hole of the ear of the bracket body fixing block of the surface-mounted top-mounted bracket is integrally formed and extends outward to form a surface-mounted wall-mounted bracket body.

[0010] Further, the two side walls of the movable block of the hidden top-mounted code or hidden wall-mounted code are formed with outwardly protruding movable block lugs, the front end edge of one end of the movable block lug is formed with a movable block width pressing head, the bottom edge of the movable block under the pressing head is formed with a movable block width track bracket, the track bracket of the movable block is higher than the track hooking part of the support body, the pressing head and the track bracket form a track clamping position, the track hooking part of the support body and the track clamping position of the movable block form a mounting position capable of clamping the fixed track on the top of the track, a square hole is arranged in the middle of the movable block, a groove is arranged at the rear end of the movable block, a travel rod insertion hole is arranged in the middle of the groove, one end of the n-shaped travel rod is inserted into the travel rod insertion hole, movable block spring grooves with openings are arranged on both sides of the travel rod insertion hole, and one end of the spring enters the movable block spring groove through the movable block spring groove opening.

[0011] Further, the two side walls of the movable block of the hidden top-mounted code or hidden wall-mounted code are formed with outwardly protruding movable block lugs, the front end edge of one end of the movable block lug is formed with a movable block width pressing head, the bottom edge of the movable block under the pressing head is formed with a movable block width track bracket, the track bracket and the top plate of the support body form a track clamping position, the track hooking part of the support body and the track clamping position of the movable block form a mounting position capable of clamping the fixed track on the top of the track, a square hole is arranged in the middle of the movable block, a groove is arranged at the rear end of the movable block, a travel rod insertion hole is arranged in the middle of the groove, one end of the n-shaped travel rod is inserted into the travel rod insertion hole, movable block spring grooves with openings are arranged on both sides of the travel rod insertion hole, and one end of the spring enters the movable block spring groove through the movable block spring groove opening.

[0012] Further, the fixed block two side walls are formed with outward protruding fixed block lug, the fixed block is provided with a groove, the groove is provided with a travel rod travel groove, the travel groove is provided with an n-shaped travel rod loosening position on the outer cliff wall, the other end of the n-shaped travel rod pin is inserted into the travel rod travel groove and does not contact the bottom of the travel rod travel groove, the connecting arm between the two pins of the n-shaped travel rod is suspended, the groove is formed with a block body, the block body is provided with an n-shaped travel rod tensioning position, the block body is provided with an n-shaped travel rod single-pass portion near the n-shaped travel rod loosening position, the single-pass portion includes an expansion body, a single-pass portion spring and a base integrally formed with the block body, the single-pass portion spring and the expansion body enter the base in sequence, the expansion body lug is clamped into the expansion body travel hole of the base, the travel rod travel groove is provided with a fixed block spring groove with an opening on both sides, the other end of the spring enters the fixed block spring groove through the fixed block spring groove opening, the function of the single-pass portion is that the n-shaped travel rod can only move in the clockwise direction, when the expansion body is inserted into the base by the pin of the n-shaped travel rod when the inclined surface of the expansion body of the single-pass portion is reached, the n-shaped travel rod passes through the single-pass portion and enters the loosening position, and the pin of the n-shaped travel rod is blocked by the flat surface of the expansion body of the single-pass portion and cannot pass through in the counterclockwise direction.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] The utility model discloses a self -locking device and the window curtain track installation code for application have the self -locking device, including hidden top -mounted code, hidden wall -mounted code, open -top -mounted code, open -wall -mounted code, and the compact structure of installation code is installed, and the large hooking part function surface, the bearing capacity is stronger, and the installation code is with self -locking device, and just can realize that the installation code movable block bracket pops -out card slot or shrinks and separates of track installation code only by pressing and putting, and the installation or disassembly of track is simply and quickly completed, the hooking part of the special design of hidden top -mounted code with self -locking device, after installing the first hidden installation code, can hook the track and continue the installation of remaining hidden top -mounted code, and the inclined surface of hooking part is attached to the hooking surface of track, and at this moment, the track is greatly inclined, and the screw hole of the most front end of the top of installation code is completely exposed to facilitate the fixing with screw, and after the track is greatly inclined, the support surface on the upper plays the blocking effect, and the track cannot fall off and slide out, and the inclined surface of hooking part is attached to the hooking surface of track, and the installation of hidden top -mounted code is in a line parallel, and after the installation of all hidden top -mounted codes is completed, the track other end installation code card slot is sent into the hidden top -mounted code movable block bracket position, and the movable block pressing head of all hidden top -mounted codes is pressed down, and the installation code movable block bracket pops -out and is clamped into the track installation code card slot, and the installation of track is completed, and the movable block pressing head of all hidden top -mounted codes is pressed down again, and the installation code movable block bracket shrinks and separates out of the track installation code card slot, and the disassembly of track is completed, so that the installation or disassembly of track is convenient and fast.

[0015] The utility model will be described in more detail based on the embodiments and with reference to the drawings hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the hidden top-mounted code of the utility model embodiment (bottom view).

[0017] Figure 2 It is the exploded view of the hidden top-mounted code of the utility model embodiment (top view).

[0018] Figure 3 It is the large angle oblique side view of the hooking part of the hidden top-mounted code hooking the first track after a large angle.

[0019] Figure 4 It is the schematic diagram (bottom view) of the hooking part of the hidden top-mounted code hooking the first track after a large angle and completely exposing the screw hole of the topmost end of the installation code top.

[0020] Figure 5 It is the side view of the hidden top-mounted code completely clamped into the first track.

[0021] Figure 6 It is the overall structure diagram of the hidden wall-mounted code of the utility model embodiment (bottom view).

[0022] Figure 7 It is the side view of the hidden wall-mounted code completely clamped into the first track.

[0023] Figure 8 It is the overall structure diagram of the exposed top-mounted code of the utility model embodiment (bottom view).

[0024] Figure 9 It is the exploded view of the exposed top-mounted code of the utility model embodiment (top view).

[0025] Figure 10 It is the side view of the exposed top-mounted code completely clamped into the second track.

[0026] Figure 11 It is the overall structure diagram of the exposed wall-mounted code of the utility model embodiment (bottom view).

[0027] Figure 12 It is the side view of the exposed wall-mounted code completely clamped into the second track.

[0028] Figure 13 It is the overhead enlarged view of the n-shaped stroke rod and single passage part of the curtain track installation code in the loosening position.

[0029] Figure 14Is the loose position and the position of the tension position of the n-shaped stroke rod inside the curtain rail mounting code of the embodiment of the utility model (top view).

[0030] Figure 15 Is the single-pass partial view of the inside of the curtain rail mounting code of the embodiment of the utility model.

[0031] Reference numerals.

[0032] a-hidden top-mounted code: a1-bracket body: a11-rail hooking part: a12-movable block bracket: a13-movable block stroke gap: a14-movable block ear stroke hole: a15-fixed block ear fixing hole:

[0033] ab1-hidden wall-mounted code: b1-bracket body:

[0034] c-open top-mounted code: c1-bracket body: c11-rail hooking part: c12-movable block bracket: c13-movable block ear stroke hole: c14-fixed block ear fixing hole:

[0035] cd1-open wall-mounted code: d1-bracket body:

[0036] 21-movable block: 211-rail bracket: 212-pressing head: 213-movable block groove: 2131-stroke rod insertion hole: 214-movable block spring groove: 215-movable block ear: 216-square hole: 217-rail clamping position:

[0037] 22-movable block: 221-rail bracket: 222-movable block groove: 2221-stroke rod insertion hole: 223-movable block spring groove: 224-movable block ear: 225-square hole: 226-rail clamping position:

[0038] 3-fixed block: 31-block body: 311-single-pass part: 3111-base: 31111-base ear stroke hole: 3112-elastic body: 31121-elastic body ear: 3113-single-pass part spring: 312-n-shaped stroke rod loosening position: 313-n-shaped stroke rod tension position: 32-fixed block ear: 33-fixed block spring groove: 34-stroke rod travel groove: 35-fixed block groove:

[0039] 4-n-shaped stroke rod:

[0040] 5-spring:

[0041] 6-mounting code screw hole: Embodiment

[0042] The embodiments of the technical scheme of the utility model will be described below in detail with reference to the drawings. The following embodiments are only used to make the technical scheme of the utility model clearer, and therefore only serve as examples, but cannot limit the protection scope of the utility model.

[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meanings understood by the technical personnel in the technical field to which the utility model belongs.

[0044] As Figures 1 to 6 shown, the bracket body a1 of the hidden top-mounted code a is provided with movable block hanging ear stroke holes a14 and fixed block hanging ear fixing holes a15 on both sides, and the bottom of the bracket body a1 is respectively formed with inwardly extending movable block brackets a12, the movable block hanging ear stroke holes a14 of the bracket body a1 are provided with movable block stroke notches a13 at the top of one end, and the fixed block hanging ear fixing holes a15 of the bracket body a1 are formed with bracket body width track hooking parts a11 at the bottom of one end.

[0045] The bracket body track hooking part a11 of the hidden top-mounted code a is integrally formed with a hidden wall-mounted code ab1 bracket body b1 extending outwardly at the rear end.

[0046] The bracket body c1 of the exposed top-mounted code c is provided with movable block hanging ear stroke holes c13 and fixed block hanging ear fixing holes c14 on both sides, and the bottom of the bracket body c1 is respectively formed with inwardly extending movable block brackets c12, and the movable block hanging ear stroke holes c13 of the bracket body c1 are formed with track hooking parts c11 at the bottom of the front end of the top plate of one end.

[0047] The fixed block hanging ear fixing holes c14 of the bracket body c1 of the exposed top-mounted code c are integrally formed with exposed wall-mounted code cd1 bracket body d1 extending outwardly at the rear end.

[0048] The two side walls of the movable block 21 of the concealed top-mounted code a or the concealed wall-mounted code ab1 are formed with outwardly protruding movable block lugs 215. The front end edge of the movable block 21 at one end of the movable block lugs 215 is formed with a movable block width pressing head 212. The bottom edge of the movable block 21 below the pressing head 212 is formed with a movable block width track bracket 211. The track bracket 211 of the movable block 21 is higher than the track hooking part a11 of the support body a1. A track clamping position 217 is formed between the pressing head 212 and the track bracket 211. The track hooking part a11 of the support body a1 and the track clamping position 217 of the movable block 21 form a mounting position capable of clamping a fixed track on the top of the track. A square hole 216 is arranged in the middle of the movable block 21. A recess 213 is arranged at the rear end of the movable block 21. A travel rod insertion hole 2131 is arranged in the middle of the recess 213. One end of the n-shaped travel rod 4 is inserted into the travel rod insertion hole 2131. Movable block spring recesses 214 with openings are arranged on both sides of the travel rod insertion hole 2131. One end of the spring 5 enters the movable block spring recess 214 through the opening of the movable block spring recess 214.

[0049] The two side walls of the movable block 22 of the surface-mounted top-mounted code c or the surface-mounted wall-mounted code cd1 are formed with outwardly protruding movable block lugs 224. The bottom edge of the front end of the movable block 22 at one end of the movable block lugs 224 is formed with a track bracket 221 with a movable block width. A track clamping position 226 is formed between the track bracket 221 and the top plate of the support body c1. The track hooking part c11 of the support body c1 and the track clamping position 226 of the movable block 22 form a mounting position capable of clamping a fixed track on the top of the track. A square hole 225 is arranged in the middle of the movable block 22. A recess 222 is arranged at the rear end of the movable block 22. A travel rod insertion hole 2221 is arranged in the middle of the recess 222. One end of the n-shaped travel rod 4 is inserted into the travel rod insertion hole 2221. Movable block spring recesses 223 with openings are arranged on both sides of the travel rod insertion hole 2221. One end of the spring 5 enters the movable block spring recess 223 through the opening of the movable block spring recess 223.

[0050] The fixed block 3 is provided with outward protruding fixed block lug 32 on both sides of the wall, and a recess 35 is arranged in the middle of the fixed block 3. A travel rod travel groove 34 is arranged in the middle of the recess 35, and an n-shaped travel rod loosening position 312 is arranged on the outer cliff wall of the travel groove 34. The other end of the n-shaped travel rod 4 is inserted into the travel groove 34 and does not contact the bottom of the travel groove 34. The connecting arm between the two pins of the n-shaped travel rod 4 is suspended. A block body 31 is formed in the middle of the groove 34, and the block body 31 is provided with an n-shaped travel rod tensioning position 313. The block body 31 is provided with an n-shaped travel rod single-pass portion 311 near the n-shaped travel rod loosening position 312. The single-pass portion 311 includes an extension body 3112, a single-pass portion spring 3113, and a base 3111 integrally formed with the block body 31. The single-pass portion spring 3113 and the extension body 3112 enter the base 3111 in sequence. The extension body lug 31121 is clamped into the extension body travel hole 31111 of the base 3111. The travel groove 34 is provided with a fixed block spring groove 33 with an opening on both sides. The other end of the spring 5 enters the fixed block spring groove 33 through the opening of the fixed block spring groove 33.

[0051] The function of the single-pass portion 311 is to allow the n-shaped travel rod 4 to move only in the clockwise direction. When the extension body 3112 is inserted into the base, the n-shaped travel rod 4 passes through the single-pass portion and enters the loosening position 312. When moving in the counterclockwise direction, the n-shaped travel rod 4 pin is blocked by the flat surface of the single-pass portion extension body 3112 and cannot pass through.

[0052] Principle of implementation

[0053] When installing the surface-mounted top-mounted code c or surface-mounted wall-mounted code cd1 track, the track hooking part c11 of the installation code support body hooks the installation code card slot at one end of the top of the track. The other end of the installation code movable block bracket c12 is pressed down against the track. The n-shaped travel rod 4 inside the installation code travels to the loosening position 312. The movable block 22 track bracket 221 is popped out and clamped into the installation code card slot at the other end of the top of the track. After all the installation codes are clamped into the track, the track is fixed to the installation surface with screws, and the installation is completed.

[0054] When the hidden top-mounted code a or the hidden wall-mounted code ab1 is installed, the installation code is used to fix the rail on the installation surface by screw, then the installation code clamping slot at one end of the top of the rail is hooked to the rail hooking part a11 of the installation code support body, the installation code clamping slot at the other end of the top of the rail is abutted to the rail clamping position 217, the movable block pressing head 212 is pressed once, the n-shaped stroke rod 4 inside the installation code is advanced to the loosening position 312, the movable block rail bracket 211 is popped out to clamp the installation code clamping slot at the other end of the top of the rail, the installation is completed, when the rail needs to be dismounted, the movable block pressing head 212 is pressed once, the n-shaped stroke rod 4 inside the installation code is advanced to the tensioning position 313, the movable block rail bracket 211 is retracted, and then the rail can be taken off.

[0055] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model, especially, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way, the utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A self-locking device and a curtain track mounting bracket using the self-locking device, including a concealed top-mounted bracket, a concealed wall-mounted bracket, a visible top-mounted bracket, and a visible wall-mounted bracket. The mounting bracket consists of a bracket body, a movable block, a fixed block, an N-shaped travel rod, and a spring, and is characterized by: The movable block is connected to the movable block hanging ear travel hole of the bracket body through the movable block hanging ear and slides inside the bracket body, and the fixed block is fixed in the fixed block hanging ear fixing hole of the bracket body through the fixed block hanging ear. The movable block is provided with a travel rod socket, and the pin at one end of the N-shaped travel rod is inserted into the travel rod socket of the movable block. The fixed block is provided with a travel groove of the travel rod, and the pin at the other end of the N-shaped travel rod is inserted into the travel groove of the travel rod of the fixed block and does not contact the bottom of the travel groove. The connecting arm between the two pins of the N-shaped travel rod remains suspended, and the movable block and the fixed block are respectively provided with spring grooves with notches, and the spring grooves with notches in the movable block and the fixed block are bridged by a spring.

2. A self-locking device and a curtain track mounting bracket using the self-locking device according to claim 1, including a hidden top mounting bracket, characterized in that The bracket body of the hidden top-mounted code is provided with movable block hanging ear travel holes and fixed block hanging ear fixing holes on both sides, and movable block brackets extending inward are formed at the bottom of both sides of the bracket body respectively. A movable block travel notch is provided at the top of one end of the bracket body close to the movable block hanging ear travel hole, and a track hook portion with the width of the bracket body is formed at the bottom of one end of the bracket body close to the fixed block hanging ear fixing hole.

3. A self-locking device and a curtain track mounting bracket using the self-locking device according to claim 2, including a hidden wall mounting bracket, characterized in that The rear end of the track hook portion of the bracket body of the hidden top-mounted bracket is integrally formed and extends outward to form a hidden wall-mounted bracket body.

4. A self-locking device and a curtain track mounting bracket using the self-locking device according to claim 1, including a surface-mounted top-mounted bracket, characterized in that The bracket body of the surface-mounted top-mounted code is provided with movable block hanging ear travel holes and fixed block hanging ear fixing holes on both sides, and movable block brackets extending inward are formed at the bottom of both sides of the bracket body, and a rail hook portion is formed at the bottom of the front end of the top plate of the bracket body near one end of the movable block hanging ear travel hole.

5. A self-locking device and a curtain track mounting bracket using the self-locking device according to claim 4, including a surface-mounted wall-mounted bracket, characterized in that The rear end of the fixing hole of the bracket body fixing block of the surface-mounted top-mounted code is integrally formed and extends outward to form a surface-mounted wall-mounted code bracket body.

6. A self-locking device and a curtain track mounting bracket using the self-locking device according to claim 1, including a hidden top mounting bracket and a hidden wall mounting bracket, characterized in that The movable block is formed with movable block hanging ears protruding outward on both side walls of the movable block, and a pressing head is formed on the front edge of the movable block at one end of the movable block hanging ear with the width of the movable block, and a track bracket is formed on the bottom edge of the movable block below the pressing head with the width of the movable block, the track bracket of the movable block is higher than the track hooking part of the bracket body, and a track snap-in position is formed between the track hooking part of the bracket body and the track snap-in position of the movable block to form an installation position of the fixed rail that can be snapped into the top of the track. A square hole is provided in the middle of the movable block, and a groove is provided at the rear end of the movable block, and a travel rod insertion hole is provided in the middle of the groove, and one end pin of the N-shaped travel rod is inserted into the travel rod insertion hole, and movable block spring grooves with notches are provided on both sides of the travel rod insertion hole, and one end of the spring enters the movable block spring groove through the notch of the movable block spring groove.

7. A self-locking device and a curtain track mounting bracket using the self-locking device according to claim 1, including a surface-mounted top bracket and a surface-mounted wall bracket, characterized in that The movable block is formed with movable block hanging ears protruding outward on both side walls of the movable block, and a track bracket with the width of the movable block is formed on the bottom edge of the front end of the movable block hanging ear, and a track card position is formed between the track bracket and the top plate of the bracket body, and the track hooking portion of the bracket body and the track card position of the movable block form an installation position of the fixed rail that can be clamped on the top of the track. A square hole is provided in the middle of the movable block, and a groove is provided at the rear end of the movable block, and a travel rod insertion hole is provided in the middle of the groove, and one end pin of the N-shaped travel rod is inserted into the travel rod insertion hole, and movable block spring grooves with notches are provided on both sides of the travel rod insertion hole, and one end of the spring enters the movable block spring groove through the notch of the movable block spring groove.

8. A self-locking device and a curtain track mounting bracket using the self-locking device according to claim 1, comprising a concealed top-mounted bracket, a concealed wall-mounted bracket, a visible top-mounted bracket, and a visible wall-mounted bracket, characterized in that: The cam is provided with a groove on both sides of the travel rod, and the other end of the spring enters the fixed block groove through the groove of the travel rod.

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