Drain plug linkage device

Abstract

The present invention discloses a drain plug linkage device, comprising: a pull rod assembly, an operating rod, a drain plug and a drain pipe, the drain plug is arranged at the upper end of the drain pipe, the pull rod assembly links the operating rod, and the operating rod links the drain plug to move up and down, the pull rod assembly comprises a pull rod and a connecting sleeve, the pull rod is linked to the connecting sleeve, a plurality of snap-in portions are recessed at intervals on the operating rod, a plurality of positioning portions with openings are spaced at intervals on the connecting sleeve, one of the snap-in portions of the operating rod selectively passes through one of the openings and is snapped into the corresponding positioning portion, the present invention makes it simple to adjust the height of the pull rod assembly and the distance between the pull rod assembly and containers such as washbasins, bathtubs or hand sinks, and convenient to install.

Description

Technical Field

[0001] The present invention relates to the technical field of drain devices, in particular to a drain plug linkage device. Background Art

[0002] In containers such as washbasins, bathtubs or hand sinks, it is desirable to provide a drain, also known as a drain device, to store or drain water in the container. Such a drain device is usually in the form of a drain plug linkage structure.

[0003] The existing drain plug linkage device usually includes a pull rod assembly, an operating rod, a drain plug and a drain pipe, wherein the drain plug is arranged at the upper end of the drain pipe, the pull rod assembly links the operating rod, and the operating rod links the drain plug to move up and down, so that the user can operate the pull rod assembly to open or close the drain plug, wherein the pull rod assembly usually includes a pull rod and a connecting sleeve, a plurality of mutually unconnected positioning holes are provided on the connecting sleeve at intervals, a plurality of snap-in parts are provided on the operating rod at intervals, and the snap-in parts are selectively snapped into the corresponding positioning parts. During the installation process, when the user needs to adjust the height of the pull rod assembly When adjusting the distance between the pull rod assembly and containers such as washbasins, bathtubs or hand sinks, due to space and angle constraints, it is often necessary to first pull the pull rod out of the pull rod assembly, then pull the operating rod out of the connecting sleeve, and then insert the selected clip portion of the pull rod assembly at the distance between the pull rod assembly and containers such as washbasins, bathtubs or hand sinks into the positioning hole at the required height. Since the existing drain plug linkage device is used in the narrow space below containers such as washbasins, bathtubs or hand sinks, the above-mentioned operation of adjusting the height of the pull rod assembly and the distance between the pull rod assembly and containers such as washbasins, bathtubs or hand sinks becomes difficult, resulting in inconvenience in installation.

[0004] In view of this, the inventors of the present invention have deeply conceived and actively studied, improved and tried to develop and design the present invention in order to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a drain plug linkage device which is easy to install.

[0006] To achieve the above object, the solution of the present invention is:

[0007] A drain plug linkage device includes: a pull rod assembly, an operating rod, a drain plug and a drain pipe, the drain plug is accommodated at the upper end of the drain pipe, the pull rod assembly links the operating rod, and the operating rod links the drain plug to move up and down, the pull rod assembly includes a pull rod and a connecting sleeve, the pull rod is linked to the connecting sleeve, a plurality of snap-in portions are recessed at intervals on the operating rod, the connecting sleeve and the operating rod are cross-arranged, a plurality of positioning portions with openings are provided at intervals on the connecting sleeve, and one of the snap-in portions of the operating rod selectively passes through one of the openings and is snapped into the corresponding positioning portion.

[0008] The pull rod assembly also includes an outer sleeve, the lower end of the outer sleeve is fixed to the upper end of the connecting sleeve, the upper end inner wall of the outer sleeve is provided with a plurality of clamping parts protruding downward, the outer wall of the pull rod is provided with a groove for the corresponding clamping parts to be clamped in, the upper end of the connecting sleeve is provided with at least one button, the inner wall of the button is provided with a plurality of inserts protruding toward the pull rod, and the inserts can be movably squeezed between the clamping parts to selectively expand the clamping parts outward.

[0009] The number of the buttons is two, and the buttons are symmetrically arranged about the central axis of the outer sleeve.

[0010] The outer sleeve is provided with a plurality of second clamping holes at intervals, and the outer wall of the connecting sleeve is provided with a plurality of second fasteners which are respectively clamped into the corresponding second clamping holes at intervals.

[0011] The outer wall of the drain pipe is provided with a thread, the thread is screwed with a nut, and a gasket is fixed on the nut.

[0012] The pull rod assembly further includes an outer sleeve, which is penetrated by an integrally formed transverse hole and a vertical hole, and is sleeved on the connecting sleeve.

[0013] A convex point is provided at the connection between the upper wall surface of the vertical hole and the upper wall surface of the horizontal hole, and the convex point selectively presses against the operating rod.

[0014] The connecting sleeve includes at least one side wall, the positioning parts are arranged on the side wall, and the positioning parts are communicated with each other.

[0015] The inner wall of the upper end of the drain pipe is provided with at least one guide inclined surface, and the drain plug includes a plug surface, at least two side blocks and an end connected to the operating rod arranged in sequence from top to bottom, the side blocks are arranged at intervals, the width of at least one side block is greater than the width of the other side blocks, and the lower end of at least one side block is provided with a mating surface, and the upper end of the mating surface can slide along the guide inclined surface; when the upper end of the mating surface slides to abut against the bottom of the guide inclined surface, the end is aligned with the mounting surface of the operating rod and faces the operating rod.

[0016] The drain plug linkage device also includes a connecting component for the operating rod to pass through, the side wall of the drain pipe is provided with a notch, and the groove wall of the notch is protruded with at least one clamping block. The connecting component is sealed with the side wall of the drain pipe, and the outer wall of the connecting component is protruded with at least one clamping groove, and the outer wall of the connecting component is just in contact with the groove wall of the notch, and the clamping block is rotated to be clamped into the clamping groove.

[0017] After adopting the above technical solution, the present invention adopts the structural design of the connecting sleeve and the outer sleeve, the connecting sleeve and the operating rod are cross-arranged, the positioning parts are spaced apart on the connecting sleeve, and the operating rod is provided with a snap-in part. During the installation process, when the user needs to adjust the height of the pull rod assembly and the distance between the pull rod assembly and containers such as washbasins, bathtubs or wash basins as needed, the operating rod is moved to disengage the snap-in part inserted into the positioning part from the opening of the corresponding positioning part. At this time, there is no need to pull out the pull rod or separate the operating rod, and the operating rod can be moved left and right and up and down at will. When moved to a suitable installation position, the snap-in part and the snap-in part are selectively engaged with each other. After the engagement, the relative position of the operating rod and the connecting sleeve is completely fixed, thereby making it simple to adjust the height of the pull rod assembly and the distance between the pull rod assembly and containers such as washbasins, bathtubs or wash basins, making the installation of the present invention convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a partial exploded view (1) of the first embodiment of the present invention;

[0019] Figure 2 This is a partial assembly diagram of the first embodiment of the present invention;

[0020] Figure 3 A partial cross-sectional view of the first embodiment of the present invention;

[0021] Figure 4 This is a partial exploded view (2) of the first embodiment of the present invention;

[0022] Figure 5 A partial cross-sectional view (1) of embodiment 1 of the present invention;

[0023] Figure 6 is a cross-sectional view of embodiment 1 of the present invention;

[0024] Figure 7 A partial cross-sectional view (2) of the first embodiment of the present invention;

[0025] Figure 8 This is a diagram (1) showing the usage state of the first embodiment of the present invention;

[0026] Figure 9 for Figure 8 A partial cross-sectional view of

[0027] Figure 10 A three-dimensional diagram (2) of the use state of the embodiment 1 of the present invention;

[0028] Figure 11 for Figure 10 A partial cross-sectional view of

[0029] Figure 12 A perspective view of a second embodiment of the present invention;

[0030] Figure 13 A perspective view of a third embodiment of the present invention;

[0031] Figure 14 A perspective view of a fourth embodiment of the present invention;

[0032] Figure 15 for Figure 14 Partial cutaway view;

[0033] Figure 16 A partial cross-sectional view (1) of the fourth embodiment of the present invention;

[0034] Figure 17 This is a partial cross-sectional view (2) of embodiment 4 of the present invention.

[0035]

Explanation of symbols

[0036] Tie rod assembly 1

[0037] Pull rod 11 Connecting sleeve 12

[0038] Groove 111

[0039] Positioning portion 121 Side wall 122

[0040] Button 123 Insert 124

[0041] Second fastener 125

[0042] Elastic stopper 126

[0043] Opening 1211

[0044] Outer sleeve 13

[0045] Horizontal hole 131 Vertical hole 132

[0046] Bump 1321

[0047] Outer Kit 14

[0048] Clamping member 141 Second clamping hole 142

[0049] Joystick 2

[0050] Ball head 21 Snap-in portion 22

[0051] Drain plug 3

[0052] Perforation 31 Plug surface 32

[0053] Side block 33 End 34

[0054] Mating surface 331

[0055] Upper end 3311 of the mating surface

[0056] Drain pipe 4

[0057] Guide slope 41 notch 42

[0058] Block 421

[0059] Nut 51 Washer 52

[0060] Connecting Components 6

[0061] Card slot 61

[0062] Body 62 Cover 63

[0063] The first fastener 621 and the first locking hole 631 . DETAILED DESCRIPTION

[0064] In order to achieve the above-mentioned objectives and effects, the technical means and structures adopted by the present invention are illustrated in detail below with reference to the preferred embodiments of the present invention, and their features and functions are described for a complete understanding.

[0065] See also Figures 1 to 17 As shown, the present invention discloses a drain plug linkage device, comprising: a pull rod assembly 1, an operating rod 2, a drain plug 3 and a drain pipe 4, wherein the drain plug 3 is accommodated at the upper end of the drain pipe 4, the pull rod assembly 1 links the operating rod 2, and the operating rod 2 links the drain plug 3 to move up and down, and a through hole 31 is provided at the lower end of the drain plug 3, and the operating rod 2 passes through the drain pipe 4 and the through hole 31, and the pull rod assembly 1 comprises a pull rod 11, a connecting sleeve 12 and an outer sleeve 13, the pull rod 11 is linked to the connecting sleeve 12, and the outer sleeve 13 is selectively connected to the connecting sleeve 12 moves on the operating rod 2, a plurality of snap-in portions 22 are recessed at intervals on the operating rod 2, the connecting sleeve 12 and the operating rod 2 are cross-arranged, a plurality of positioning portions 121 with openings 1211 are spaced apart on the connecting sleeve 12, the outer sleeve 13 is penetrated by an integrally formed horizontal hole 131 and a vertical hole 132, the outer sleeve 13 is sleeved on the connecting sleeve 12, one of the snap-in portions 22 of the operating rod 2 selectively passes through the vertical hole 132 and one of the openings 1211 and is snapped into the corresponding positioning portion 121, and the positioning portions 121 can be communicated with each other.

[0066] Therefore, during installation, please refer to Figures 8 to 11As shown, when the user needs to adjust the height of the pull rod assembly 1 and the distance between the pull rod assembly 1 and a container such as a wash basin, bathtub or hand sink as needed, the outer sleeve 13 is moved up, so that the operating rod 2 can move into the horizontal hole 131, and the positioning portion 121 engaged in the snap-in portion 22 is disengaged from the corresponding snap-in portion 22. At this time, there is no need to pull out the pull rod 11 or separate the operating rod 2. The operating rod 2 can move freely left and right and up and down with the outer sleeve 13. When moved to a suitable installation position, the positioning portion 121 and the snap-in portion 22 selectively engage with each other. After the engagement, the relative position of the operating rod 2 and the connecting sleeve 12 is completely fixed. Then the outer sleeve 13 is moved down, and the side wall of the vertical hole 132 presses against the operating rod 2. The positioning portion 121 and the snap-in portion 22 that engage with each other will not be disengaged, making it simple to adjust the height of the pull rod assembly 1 and the distance between the pull rod assembly 1 and a container such as a wash basin, bathtub or hand sink, making the installation of the present invention convenient and the overall use and operation convenient.

[0067] Furthermore, the bottom of the side walls of the connecting sleeve 12 can be respectively provided with elastic stoppers 126. When the outer sleeve 13 needs to be inserted into the connecting sleeve 12, the elastic stoppers 126 can be pressed against the side walls of the connecting sleeve 12 to allow the outer sleeve 13 to be inserted into the connecting sleeve 12. After the outer sleeve 13 is inserted into the connecting sleeve 12, the elastic stoppers 126 are away from the side walls of the connecting sleeve 12, and resist the bottom of the outer sleeve 13 to prevent the outer sleeve 13 from falling out.

[0068] Next, the present invention can also include a connecting component 6 for the operating rod 2 to pass through, the side wall 122 of the drain pipe 4 is provided with a notch 42, the groove wall of the notch 42 is provided with at least one block 421, the connecting component 6 is sealed and connected to the side wall 122 of the drain pipe 4, the outer wall of the connecting component 6 is provided with at least one groove 61, the outer wall of the connecting component 6 is just in contact with the groove wall of the notch 42, the connecting component 6 can be rotated in the notch 42, and the blocks 421 are respectively rotated and inserted into the corresponding grooves 61, and the structural design of the connecting component 6 is used to realize the drainage pipe 4 is quickly assembled with the operating rod 2, so that the connecting component 6 and the drain pipe 4 can be quickly connected and fixed. Since the connecting component 6 and the drain pipe 4 of the present invention are formed separately, when the space under a container such as a washbasin, bathtub or hand sink is narrow, the connecting component will not affect the fixation of the upper end of the drain pipe 4 to the container such as the washbasin, bathtub or hand sink, so that the present invention is easy to install. When installing the present invention, the upper end of the drain pipe 4 can be fixed to the container such as the washbasin, bathtub or hand sink first, and then the connecting component 6 can be connected and fixed to the drain pipe 4 and the operating rod 2.

[0069] In the embodiment, the number of the block 421 and the slot 61 is two, and the block 421 can be provided with a groove. The inner wall of the slot 61 can be provided with a protrusion that is fixed into the groove, so that the connecting component 6 is firmly connected to the drain pipe 4. The cross-section of the slot 61 is U-shaped, and the end of the connecting component 6 extending into the drain pipe 4 is provided with a sealing ring, so that the connecting component 6 is sealed and connected to the drain pipe 4.

[0070] Furthermore, the inner wall of the upper end of the drain pipe 4 is provided with at least one guide inclined surface 41, and the drain plug 3 includes a plug surface 32, at least two side blocks 33 and an end portion 34 provided with a through hole 31, which are arranged in sequence from top to bottom. The side blocks 33 are arranged at intervals, and the width of at least one side block 33 is greater than the width of the other side blocks 33. The lower end of at least one side block 33 is provided with a mating surface 331 that gradually shrinks from top to bottom, and the upper end 3311 of the mating surface 331 can slide along the guide inclined surface 41; when the upper end 3311 of the mating surface 331 slides to abut against the bottom of the guide inclined surface 41, the through hole 31 is aligned with the operating rod 2; since the inner wall of the drain pipe 4 is provided with the guide inclined surface 41 1 and the width of at least one side block 33 of the drain plug 3 is greater than the width of the other side blocks 33, and at least one side block 33 is provided with a mating surface 331 that can be combined with the guide inclined surface 41, so that the installer can easily determine the side block 33 with the largest width, and use the mating surface 331 of the side block 33 with the largest width to align with the guide inclined surface 41, and install the drain plug 3. The upper end 3311 of the mating surface 331 will slide from the top of the guide inclined surface 41 to the bottom of the guide inclined surface 41. At this time, the through hole 31 of the drain plug 3 is just aligned with the operating rod 2, so that the operating rod 2 can quickly pass through the through hole 31, realizing the rapid assembly of the drain plug 3 and the operating rod 2, so that the overall assembly efficiency is improved.

[0071] In the embodiment, the number of the guide bevels 41 is two, but it is not limited to this, and other numbers can also be used. The guide bevels 41 are connected as a whole, wherein the width of the two side blocks 33 is greater than the width of the other side blocks 33, and the lower ends of the two side blocks 33 are provided with matching surfaces 331, wherein the two side blocks 33 are symmetrically arranged about the central axis of the drain plug 3, and the upper ends 3311 of the matching surfaces 331 of the two side blocks 33 can respectively slide to the bottom of the corresponding guide bevels 41, so that the through hole 31 can be aligned with the operating rod 2 more quickly.

[0072] Furthermore, the outer wall of the drain pipe 4 may be provided with a thread, and the thread is screwed with a nut 51, and a gasket 52 is fixed on the nut 51, so that the present invention can adjust the position of the screwed nut 51 according to the thickness of the container such as a washbasin, bathtub or hand sink, so that the top of the drain pipe 4 can be fixed on the container such as a washbasin, bathtub or hand sink, and the nut 51 and gasket 52 are fixed under the container such as a washbasin, bathtub or hand sink, thereby completing the assembly with the container such as a washbasin, bathtub or hand sink. The drain pipe 4 is integrally formed, and the outer wall below the thread of the drain pipe 4 has no protrusion or structure higher than the pitch of the thread, ensuring that the nut 51 and gasket 52 can be inserted from the bottom of the drain pipe 4 upward.

[0073] Furthermore, a ball head 21 can be provided on the operating rod 2, and the connecting component 6 includes a main body 62 and a cover body 63. The ball head 21 is accommodated in the main body 62, and the cover body 63 is fixed to the main body 62. The setting of the ball head 21 can facilitate the rotation of the operating rod 2. A sealing ring can be provided between the ball head 21 and the main body 62 to improve the sealing performance of the connecting component 6.

[0074] In order to facilitate the fixation of the body 62 and the cover 63 , a plurality of first fasteners 621 may be spaced apart on the outer wall of the body 62 , and the cover 63 may be provided with a plurality of first latching holes 631 for the first fasteners 621 to latch onto.

[0075] Secondly, the pull rod assembly 1 can also include an outer sleeve 14, the lower end of the outer sleeve 14 is fixed to the upper end of the connecting sleeve 12, the upper end inner wall of the outer sleeve 14 is provided with a plurality of clamping members 141 protruding downward, the outer wall of the pull rod 11 is provided with a groove 111 for the corresponding clamping members 141 to be clamped in, the upper end of the connecting sleeve 12 is provided with at least one button 123, the inner wall of the button 123 is provided with a plurality of inserts 124 protruding toward the pull rod 11, the inserts 124 can be movably squeezed between the clamping members 141, selectively making the clamping members 141 expand outward, so that the user can press the button 1 23, so that the insert 124 of the button 123 is squeezed into the corresponding clamping members 141, so that the clamping members 141 are stretched out, and the clamping members 141 are released from the groove 111 of the pull rod 11, so that the pull rod 11 can be pulled out smoothly. When the user releases the button 123, the insert 124 of the button 123 is withdrawn from the corresponding clamping members 141, and the pull rod 11 is inserted into the outer sleeve 14. The clamping member 141 will be stretched open by the pull rod 11 first. When it moves to the point where the clamping member 141 is located in the groove 111, the clamping member 141 returns to the groove 111 under the action of elastic force, thereby realizing the convenient disassembly and assembly of the present invention.

[0076] In addition, the outer sleeve 14 is provided with a plurality of second locking holes 142 at intervals, and the outer wall of the connecting sleeve 12 is provided with a plurality of second fasteners 125 that are respectively snapped into the corresponding second locking holes 142, so that the outer sleeve 14 and the connecting sleeve 12 can be quickly assembled.

[0077] Among them, see Figures 1 to 11 、 Figure 12 、 Figure 13 and Figures 14 to 17 As shown, the difference between the first embodiment of the present invention and the second embodiment and the third embodiment is that: the structure of the snap-in portion 22 on the operating rod 2 is different. The snap-in portion 22 in the first embodiment is a gap between two protrusions pressed together, the snap-in portion 22 in the second embodiment is a gap between two protrusions spaced apart, and the snap-in portion 22 in the third embodiment is a gap between two ring blocks spaced apart; and the connecting sleeve 12 in the first embodiment includes two side walls 122, wherein one side wall 122 is provided with a positioning portion 121, and the number of the button 123 is one, while the connecting sleeve 12 in the second and third embodiments only includes one side wall 122 provided with a positioning portion, and in order to allow the user to pull out the pull rod 11 more quickly, the number of the buttons 123 is two, and the button 123 is symmetrically arranged about the central axis of the outer sleeve 14; the width of the opening 1211 of the positioning portion 121 in Example 1 and Example 3 is smaller than the width inside the positioning portion 121, and the positioning portion 121 in Example 2 is a U-shaped hole; the difference between Example 1 and Example 4 of the present invention is that: the number of the buttons 123 in Example 1 is one, and the number of the buttons 123 in Example 4 is two, and the buttons 123 are symmetrically arranged about the central axis of the outer sleeve 14, so that the user can pull out the pull rod 11 more quickly, and a protrusion 1321 is provided at the connection between the upper wall surface of the vertical hole 132 and the upper wall surface of the horizontal hole 131, and the protrusion 1321 selectively presses against the operating rod 2, so that the protrusion 1321 can prevent the outer sleeve 13 from moving up due to accidental circumstances.

[0078] The technical content and technical features of the present invention have been disclosed above. The number of components of the present invention is not limited to the number described above. Those skilled in the art may still make various substitutions and modifications based on the disclosure of the present invention without departing from the creative spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited to the disclosure of the embodiments, but should include various substitutions and modifications that do not depart from the present invention and are covered by the claims.

Claims

1. A drain plug linkage device, comprising: A pull rod assembly, an operating rod, a drain plug and a drain pipe, the drain plug is arranged at the upper end of the drain pipe, the pull rod assembly is linked to the operating rod, and the operating rod is linked to the drain plug to move up and down, characterized in that: the pull rod assembly includes a pull rod and a connecting sleeve, the pull rod is linked to the connecting sleeve, a plurality of snap-in parts are arranged at intervals on the operating rod, the connecting sleeve and the operating rod are cross-arranged, and a plurality of positioning parts with openings are arranged at intervals on the connecting sleeve; the pull rod assembly also includes an outer sleeve, the outer sleeve is penetrated by an integrally formed horizontal hole and a vertical hole, the outer sleeve is sleeved on the connecting sleeve, one of the snap-in parts of the operating rod selectively passes through the vertical hole and one of the openings and is snapped into the corresponding positioning part; the connecting sleeve includes at least one side wall, and the positioning part is arranged on the side wall, The positioning parts are connected to each other. During the installation process, there is no need to pull out the pull rod or separate the operating rod. The operating rod can move freely left and right and up and down with the outer sleeve. When it is moved to a suitable installation position, the positioning part and the snap-in part selectively lock with each other. After the lock, the relative positions of the operating rod and the connecting sleeve are completely fixed. Then the outer sleeve moves downward, and the positioning part and the snap-in part that lock with each other will not be able to be disengaged under the action of the side wall of the vertical hole against the operating rod; it also includes a connecting component for the operating rod to pass through, the side wall of the drain pipe is provided with a notch, and the groove wall of the notch is protruded with at least one card block, the connecting component is sealed with the side wall of the drain pipe, the outer wall of the connecting component is protruded with at least one card groove, the outer wall of the connecting component just abuts against the groove wall of the notch, and the card block is rotated and locked into the card groove.

2. The drain plug linkage device according to claim 1, characterized in that: The pull rod assembly also includes an outer sleeve, the lower end of the outer sleeve is fixed to the upper end of the connecting sleeve, the upper end inner wall of the outer sleeve is provided with a plurality of clamping parts protruding downward, the outer wall of the pull rod is provided with a groove for the corresponding clamping parts to be clamped in, the upper end of the connecting sleeve is provided with at least one button, the inner wall of the button is provided with a plurality of inserts protruding toward the pull rod, and the inserts can be movably squeezed between the clamping parts to selectively expand the clamping parts outward.

3. The drain plug linkage device according to claim 2, characterized in that: The number of the buttons is two, and the buttons are symmetrically arranged about the central axis of the outer sleeve.

4. The drain plug linkage device according to claim 3, characterized in that: The outer sleeve is provided with a plurality of second clamping holes at intervals, and the outer wall of the connecting sleeve is provided with a plurality of second fasteners which are respectively clamped into the corresponding second clamping holes at intervals.

5. The drain plug linkage device according to any one of claims 1 to 4, characterized in that: The outer wall of the drain pipe is provided with a thread, the thread is screwed with a nut, and a gasket is fixed on the nut.

6. The drain plug linkage device according to claim 1, characterized in that: A convex point is provided at the connection between the upper wall surface of the vertical hole and the upper wall surface of the horizontal hole, and the convex point selectively presses against the operating rod.

7. The drain plug linkage device according to claim 1, characterized in that: The inner wall of the upper end of the drain pipe is provided with at least one guide inclined surface, and the drain plug includes a plug surface, at least two side blocks and an end connected to the operating rod arranged in sequence from top to bottom, the side blocks are arranged at intervals, the width of at least one side block is greater than the width of the other side blocks, and the lower end of at least one side block is provided with a mating surface, and the upper end of the mating surface can slide along the guide inclined surface; when the upper end of the mating surface slides to abut against the bottom of the guide inclined surface, the end is aligned with the mounting surface of the operating rod and faces the operating rod.

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