CN219699303U - Storage equipment of mining handheld terminal - Google Patents

Abstract

The utility model discloses storage equipment of a mining handheld terminal, and relates to the technical field of mining communication equipment. The technical key points are as follows: the protective cover is arranged above the arm supporting plate, the opening is formed in the protective cover, the protective cover is arranged above the opening of the protective cover, one end of the protective cover is hinged with one long side wall of the protective cover, a faucet is arranged at the upper end of the other long side wall of the protective cover, a limiting assembly is arranged in the faucet, and an inserting joint is arranged below one end, away from the hinge position of the protective cover and the protective cover, of the protective cover; the downside of arm layer board is equipped with multiunit fixed band, all can bond fixedly through the magic subsides between the fixed band of every group. When a worker does not use the mining handheld terminal, the mining handheld terminal can be isolated from the external environment through the equipment, so that the screen of the mining handheld terminal can be effectively protected from being scratched during the work of the worker, and the subsequent use is affected.

Description

Storage equipment of mining handheld terminal

Technical Field

The utility model relates to the technical field of mining communication equipment, in particular to storage equipment of a mining handheld terminal.

Background

The mining handheld terminal is a terminal machine used in underground coal mines, and the mining handheld terminal is a portable data processing terminal with an operating system, a memory, a CPU, a display card, a screen, a keyboard and data transmission processing capacity. The portable electric bicycle can be held in the hand, and is provided with a battery, so that the portable electric bicycle can be used in a movable mode. The mining handheld terminal is a terminal specially designed for underground coal mine communication, and can download apps such as WeChat, office software and the like. The operation is simpler, and is similar to the operation method of a common civil terminal. Under the network coverage matched with the wireless network, voice communication can be realized between the terminals and the server, and meanwhile, the wireless network has higher receiving sensitivity and ensures the maximum play of the wireless network function. The lithium ion battery is arranged on the mining handheld terminal, and when the equipment needs to be charged, the equipment is directly arranged on a charger equipped by a manufacturer, so that the equipment can be safely charged. The existing mining handheld terminal equipment is provided with a clamp on the back shell, and the terminal is directly buckled on a waistband of a person when the mining handheld terminal equipment is not used, but the mining handheld terminal equipment is still in an exposed state, so that the screen of the terminal equipment is easily scratched in the process of drying and activating workers, and the subsequent normal use is affected.

Disclosure of Invention

The utility model provides a storage device of a mining handheld terminal, which can store the mining handheld terminal when the mining handheld terminal is not used, and protect the whole mining handheld terminal, so that the screen of the mining handheld terminal is effectively prevented from being scratched in the process of drying and activating workers, and the subsequent normal use is influenced.

The above object of the present utility model is achieved by the following technical solutions:

the utility model provides a mining hand-held terminal's storage facilities, includes the arm layer board, the top of arm layer board is equipped with the protective housing, the top of protective housing is uncovered, the uncovered top of protective housing is equipped with the visor, the one end of visor with one of them lateral wall of protective housing articulates, the lateral wall upper end of the other opposite side of protective housing is equipped with the bell and spigot mouth, be equipped with spacing subassembly in the bell and spigot mouth, the visor keep away from its one end below of articulated department with the protective housing is equipped with the bayonet joint, when the visor lid is in on the uncovered of protective housing, the bayonet joint just can insert in the bell and spigot mouth and by spacing subassembly blocks; the lower side of arm layer board is equipped with multiunit fixed band, every group the fixed band is all accessible magic is pasted and is stuck fixedly between the fixed band.

Further, the width of the opening above the protective shell is between the width of the outer contour of the mining handheld terminal and the width of the display area of the mining handheld terminal, the width of the inner space of the protective shell is equal to the width of the outer contour of the mining handheld terminal, and the length of the inner space of the protective shell is larger than the length of the outer contour of the mining handheld terminal; one end of the protective shell along the length direction is inserted with a plug.

Further, the plug includes rubber buffer and baffle, the length of rubber buffer is greater than the width at mining handheld terminal, the width at rubber buffer and the length at mining handheld terminal with equal to the length of protective housing inner space, the length of baffle is greater than the width of protective housing inner space, just the baffle be close to protective housing one side with rubber buffer fixed connection.

Further, one end of the baffle in the length direction is connected with the protective shell through an elastic rope.

Further, the limit assembly comprises a spring piece, the lower end of the spring piece is fixedly connected with the inner bottom of the faucet, the upper end of the spring piece is provided with a limit stop extending to the outer side of the protective shell, the upper end of the limit stop is of a circular arc structure, a driving unit is arranged on the outer side of the middle position of the spring piece, and the driving unit can change the position of the limit stop at the upper end of the spring piece.

Further, a clamping block is arranged at one side of the lower end of the plug connector, which is close to the hinge joint of the protective cover and the protective shell.

Further, the driving unit comprises a first moving rod and a second moving rod, one end, close to each other, of the first moving rod is fixedly connected with one end, close to each other, of the second moving rod, and a button is arranged at the other end of the first moving rod; the diameter of the second movable rod is smaller than that of the first movable rod, a through hole with the same diameter as that of the first movable rod is formed in the front side wall of the faucet, the second movable rod is far away from one end of the first movable rod, penetrates through the through hole and then is abutted to the spring piece, a reset spring is sleeved on the second movable rod, one end of the reset spring is close to one end of the second movable rod and is fixedly connected with the first movable rod, the other end of the reset spring is fixedly connected with a support, the support is fixedly connected with the inner wall of the faucet, and the support is sleeved on the second movable rod and is in sliding connection with the second movable rod.

In summary, the present utility model includes at least one of the following beneficial technical effects:

the arm support plate can be placed on the arm of a worker before working, then the arm support plate is fixed by using the magic tape on the plurality of groups of fixing bands, at the moment, the worker can put the mining handheld terminal into the protective shell on the arm support plate, then the protective cover is closed, and the protective shell is closed, so that a closed space can be formed outside the mining handheld terminal, the mining handheld terminal can not be directly contacted with the external environment when the mining handheld terminal is not used, and therefore the phenomenon that the screen of the mining handheld terminal is scratched in the process of dry and alive of the worker, and the subsequent normal use is affected is effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the structure of the present utility model with the protective cover and plug fully open;

FIG. 2 is a schematic cross-sectional view of a bell and spigot of the protective shell of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2 at A;

fig. 4 is a top view of the protective case of the present utility model;

FIG. 5 is an enlarged schematic view of the structure at B in FIG. 4;

fig. 6 is a schematic view of a mining hand-held terminal housed within a protective case.

Reference numerals: 1. an arm support plate; 2. a protective shell; 3. a protective cover; 4. a socket; 5. a limit component; 51. a spring piece; 52. a limit stop; 53. a driving unit; 531. a first moving lever; 532. a second moving lever; 533. a button; 534. a through hole; 535. a return spring; 536. a bracket; 6. a plug; 7. a fixing belt; 8. a plug head; 81. a rubber stopper; 82. a baffle; 9. an elastic rope; 10. and a clamping block.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are also within the scope of the utility model.

As shown in fig. 1, fig. 2 and fig. 3, the storage device of the mining handheld terminal disclosed by the utility model comprises an arm supporting plate 1, a protective shell 2 is arranged above the arm supporting plate 1, an opening is formed above the protective shell 2, a protective cover 3 is arranged above the opening of the protective shell 2, one end of the protective cover 3 is hinged with one side wall of the protective shell 2, a socket 4 is arranged at the upper end of the side wall of the other opposite side of the protective shell 2, a limit component 5 is arranged in the socket 4, an inserting connector 6 is arranged below one end, far away from the hinge position of the protective cover 3 and the protective shell 2, of the protective cover 3 is covered on the opening of the protective shell 2, and the inserting connector 6 can be exactly inserted into the socket 4 and is blocked by the limit component 5; the lower side of the arm supporting plate 1 is provided with a plurality of groups of fixing belts 7, and each group of fixing belts 7 can be adhered and fixed through magic tape.

In the above embodiment, the cross section of the arm support plate 1 is arc-shaped and gradually becomes smaller from one end to one end, so that the arm support plate 1 can be well attached to the arm of a worker, and the wearing process of the worker can be more comfortable. The arm support plate 1 is made of hard materials, and when a worker wears the arm support plate 1 in a mine, the arm support plate can protect the arm of the worker to a certain extent. Each group of fixing belts 7 under the arm support plate 1 comprises a first belt body and a second belt body, one surface with harder thorns in the magic tape is arranged at the free end of the first belt body, and one surface with soft fibers in the magic tape is arranged at the free end of the second belt body, so that when workers of different sizes place the arm support plate 1 on the arm, the proper fixing range can be adjusted through the magic tape in the plurality of groups of fixing belts 7, and the arm of the workers can not be too tightening while the fixing effect of the arm support plate 1 is ensured.

The lower side of the bottom plate of the protective housing 2 is similar to the shape of the arm supporting plate 1, so that the integration of the bottom plate and the arm supporting plate after the bottom plate and the arm supporting plate are fixedly connected together can be improved, the upper side of the bottom plate of the protective housing 2 is provided with a horizontal plate, and after the mining handheld terminal is placed into the protective housing 2 from the opening above the protective housing 2, the back of the mining handheld terminal can be closely attached to the bottom plate of the protective housing 2, so that the state of the mining handheld terminal after being placed is more stable. When the mining handheld terminal is not used, a worker only needs to rotate the protective cover 3 around the hinging point of the protective cover and the protective housing 2 until the protective cover 3 covers the protective housing 2, at the moment, the protective cover 3 can completely seal the opening above the protective housing 2, the plug connector 6 below the protective cover 3 can be automatically clamped by the limiting assembly 5 in the faucet 4, and therefore, a closed space for isolating the mining handheld terminal from the external environment is formed by the protective cover 3 and the protective housing 2, and when the worker is dry and alive, the risk that the screen of the mining handheld terminal is scratched can be effectively reduced.

Further, as shown in fig. 1 and 6, the width of the opening above the protective housing 2 is between the width of the outer contour of the mining handheld terminal and the width of the display area thereof, the width of the inner space of the protective housing 2 is equal to the width of the outer contour of the mining handheld terminal, and the length of the inner space of the protective housing 2 is greater than the length of the outer contour of the mining handheld terminal; one end of the protective shell 2 along the length direction is inserted with a plug head 8.

In the above embodiment, according to the above arrangement, when a worker needs to put the mine handheld terminal into the protective housing 2, the plug 8 at one end of the protective housing 2 is opened, and one end of the mine handheld terminal is plugged into the inner space of the protective housing 2 from the position, and since the width of the opening above the protective housing 2 is narrower than the width of the inner space, and the height of the inner space of the protective housing 2 is equal to the thickness of the mine handheld terminal, the mine handheld terminal cannot fall out from the opening above the protective housing 2 after completely entering the inner space of the protective housing 2. As shown in fig. 6, when a worker wants to use the mine handheld terminal, the protective cover 3 is opened, the used display area of the mine handheld terminal can be directly seen through the opening above the protective shell 2, and corresponding operation can be performed on the display area with the touch function, so that the process of taking out the mine handheld terminal from the protective shell 2 is omitted, the risk of carelessly falling off the mine handheld terminal when the mine handheld terminal is taken is also reduced, meanwhile, the worker is dirty on the hand in the working process, the worker uses the mine handheld terminal when the worker is dirty, other parts except the screen of the mine handheld terminal cannot be easily polluted, and the workload of cleaning the mobile phone later is reduced.

Further, as shown in fig. 1 and 6, the plug 8 includes a rubber plug 81 and a baffle 82, the length of the rubber plug 81 is greater than the width of the mine handheld terminal, the width of the rubber plug 81 is equal to the length of the mine handheld terminal and the length of the inner space of the protective housing 2, the length of the baffle 82 is greater than the width of the inner space of the protective housing 2, and the baffle 82 is fixedly connected with the rubber plug 81 near one side of the protective housing 2.

In the above embodiment, according to the arrangement mode, the length of the rubber plug 81 is slightly larger than the width of the mining handheld terminal, and the width of the mining handheld terminal is equal to the width of the inner space of the protective shell 2, namely, the length of the rubber plug 81 is slightly larger than the width of the inner space of the protective shell 2, so that after the rubber plug 81 is plugged into the inner space of the protective shell 2, the rubber plug 81 can be extruded by the inner wall of the protective shell 2 to generate counter force, the end part of the protective shell 2 can be firmly clamped by the rubber plug 81 plugged into the inner space of the protective shell 2, the mining handheld terminal placed in the protective shell 2 is prevented from falling out, the baffle 82 connected with the rubber plug 81 can control the depth of the rubber plug 81 plugged into the protective shell 2, namely, when the baffle 82 touches the protective shell 2, the rubber plug 81 at the moment is just abutted against the mining handheld terminal in the protective shell 2, after the rubber plug 81 is plugged, the mining handheld terminal can not shake easily in the protective shell 2, and on the other hand, the baffle 82 is arranged to facilitate workers to pull the rubber plug 81 out from the protective shell 2.

Further, as shown in fig. 1 and 4, one end of the baffle 82 in the longitudinal direction is connected to the protective case 2 by an elastic string 9.

In the above embodiment, the baffle 82 is connected with the protective housing 2 through the elastic rope 9, so that after the rubber plug 81 is pulled out of the protective housing 2, a connection relationship still exists between the rubber plug 81 and the protective housing 2, the risk of losing the rubber plug 81 and the baffle 82 after being pulled out is reduced, and the elastic rope 9 has higher elasticity, so that the movable range required by the plug-in process of the baffle 82 and the rubber plug 81 is satisfied.

Further, as shown in fig. 2, 3, 4 and 5, the limiting assembly 5 includes a spring piece 51, the lower end of the spring piece 51 is fixedly connected with the inner bottom of the socket 4, a limiting stop 52 extending towards the outer side of the protective shell 2 is provided at the upper end of the spring piece 51, the upper end of the limiting stop 52 is in a circular arc structure, a driving unit 53 is provided at the outer side of the middle position of the spring piece 51, and the driving unit 53 can change the position of the limiting stop 52 at the upper end of the spring piece 51.

In the above embodiment, when the protective cover 3 is covered on the protective shell 2, the plug connector 6 on the protective cover 3 can be inserted into the socket 4, and as the plug connector 6 gradually enters the socket 4, the plug connector 6 slowly abuts against the upper portion of the limit stop block 52, and the upper end of the limit stop block 52 is in an arc structure, and the contact point of the plug connector 6 and the limit stop block 52 is close to the front end of the limit stop block 52, so that the limit stop block 52 can incline towards the inner direction of the protective shell 2 after receiving the extrusion force of the plug connector 6, and as the limit stop block 52 inclines towards the inner direction of the protective shell 2 with the spring piece 51, the plug connector 6 continuously moves downwards, and after the lower side of the protective cover 3 contacts the upper side of the protective shell 2, the protective cover 3 stops moving downwards, and at this time, the limit stop block 52 is reset under the elasticity of the spring piece 51 and is blocked on the plug connector 6, so that the position of the plug connector 6 is fixed, and the protective cover 3 cannot be opened under the covered state. The driving unit 53 of the utility model can change the position of the limit stop 52 above the spring piece 51 when working, when the limit stop 52 leaves the plug connector 6, the plug connector 6 can again pull out the bell and spigot 4, thus the worker can reopen the protective cover 3 by operating the driving unit 53, and the worker can operate on the mining handheld terminal in the protective shell 2.

Further, as shown in fig. 2 and 3, a clamping block 10 is provided at a side of the lower end of the plug connector 6 near the hinge of the protective cover 3 and the protective shell 2.

In the above embodiment, when the plug connector 6 enters the socket 4 and then moves downward, the bump stop 10 gradually moves to contact with the bump stop 52, and then the bump stop 52 is pressed to move away from the driving unit 53 until the protection cover 3 is completely covered over the protection cover 2, then the bump stop 10 just moves under the bump stop 52, at this time, the bump stop 52 is reset under the elastic force of the spring piece 51, the front end of the bump stop 52 abuts against the plug connector 6, and the lower side of the bump stop 52 is closely attached to the upper side of the bump stop 10, so that the bump stop 52 forms a limit on the bump stop 10 and blocks upward movement of the bump stop, and thus the protection cover 3 is just fixed after being covered over the protection cover 2.

Further, as shown in fig. 2, 3, 4 and 5, the driving unit 53 includes a first moving lever 531 and a second moving lever 532, one end of the first moving lever 531 and one end of the second moving lever 532 close to each other are fixedly connected, and a button 533 is provided at the other end of the first moving lever 531; the diameter of the second movable rod 532 is smaller than that of the first movable rod 531, a through hole 534 with the same diameter as that of the first movable rod 531 is formed in the front side wall of the faucet 4, one end, far away from the first movable rod 531, of the second movable rod 532 is abutted to the spring piece 51 after passing through the through hole 534, a reset spring 535 is sleeved on the second movable rod 532, one end of the reset spring 535 is fixedly connected with one end, close to the second movable rod 532, of the first movable rod 531, the other end of the reset spring 535 is fixedly connected with a support 536, the support 536 is fixedly connected with the inner wall of the faucet 4, and the support 536 is sleeved on the second movable rod 532 and is in sliding connection with the second movable rod 532.

In the above embodiment, the front side wall of the bell and spigot 4 is the side wall of the bell and spigot 4 far away from the inner space of the protective housing 2, the diameter of the through hole 534 is equal to that of the first moving rod 531, the diameter of the first moving rod 531 is larger than that of the second moving rod 532, so that the first moving rod 531 can freely enter and exit the through hole 534 with the second moving rod 532, the area of the first moving rod 531 larger than the second moving rod 532 just provides a position which can be fixedly connected with one end of the return spring 535, and the diameter of the return spring 535 is larger than that of the second moving rod 532 and smaller than that of the first moving rod 531, so that the return spring 535 moves together with the second moving rod 532 when sliding along the axis of the through hole 534. The bracket 536 of the present utility model is provided to compress the return spring 535 when the first and second moving levers 531 and 532 are moved, thereby making the return spring 535 generate elastic force, so that the first and second moving levers 531 and 532 are returned under the elastic force of the return spring 535 when the worker releases the button 533 to give no driving force to the first and second moving levers 531 and 532.

In the initial state of opening the protection cover 3, the return spring 535 is in a natural state, at this time, the end of the second moving rod 532 far away from the first moving rod 531 is only in contact with the spring piece 51, or the end of the second moving rod 532 far away from the first moving rod 531 is not in contact with the spring piece 51, in any case, the second moving rod 532 does not generate an acting force on the spring piece 51, and the end of the second moving rod 532 near the spring piece 51 is still a certain distance from the upper end of the spring piece 51, so that a space is reserved for the clamping block 10 of the plug connector 6 to reach the lower side of the limit stop 52. When the protective cover 3 is covered, the clamping block 10 on the plug connector 6 and the limit stop 52 form a matching relationship, and the limit stop 52 prevents the clamping block 10 from moving upwards at this time, so that the protective cover 3 is locked on the protective shell 2. When a worker needs to use the mining handheld terminal in the protective shell 2, the worker only needs to press the button 533, the button 533 applies driving force to the first moving rod 531, the first moving rod 531 can move towards the spring piece 51 with the second moving rod 532, the first moving rod 531 compresses the reset spring 535 on the bracket 536 in the process, the reset spring 535 forms elastic force, after the second moving rod 532 presses the spring piece 51 to leave the clamping block 10 with the limit stop 52, the worker can easily reopen the protective cover 3, then the corresponding operation is performed on the mining handheld terminal in the protective shell 2 through the opening of the protective shell 2, at the moment, the worker can also loosen the button 533, the elastic force of the reset spring 535 can act on the first moving rod 531 at the moment, and therefore the first moving rod 531 is restored to the original state with the first moving rod 531, and the operation is convenient.

The implementation principle of the embodiment is as follows: the worker firstly places the arm support plate 1 on the arm of the worker before working, then binds by using the magic tapes on the plurality of groups of fixing belts 7, then presses the button 533, opens the protective cover 3 on the protective shell 2, then pulls out the rubber plug 81 inserted into the protective shell 2 through the baffle 82, pushes the mining handheld terminal into the hole site left after pulling out the rubber plug 81 until the mining handheld terminal completely enters the inner space of the protective shell 2, and then inserts the rubber plug 81 into the protective shell 2 again, thereby avoiding the mining handheld terminal from falling off from the place in the working process. Then, the worker covers the protective cover 3 on the protective shell 2 again, and after confirming that the protective cover 3 is fastened, the worker can enter the mine to put into operation, and when the working process needs to contact with the outside or send data to a central control room, the worker only needs to lift the arm, press the button 533, then open the protective cover 3, and the mine handheld terminal can be correspondingly operated through the opening above the protective shell 2. When the mining handheld terminal is not used by a worker, the screen of the mining handheld terminal is effectively protected, and when the mining handheld terminal is used, the worker does not need to hold the mining handheld terminal, so that the polluted area of the mining handheld terminal is reduced, and the mining handheld terminal is convenient to clean later.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present utility model, and not limiting thereof; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (7)

1. Storage equipment of mining handheld terminal, its characterized in that: the novel protective cover comprises an arm supporting plate (1), wherein a protective cover (2) is arranged above the arm supporting plate (1), the protective cover (2) is open, a protective cover (3) is arranged above the opening of the protective cover (2), one end of the protective cover (3) is hinged with one side wall of the protective cover (2), a socket (4) is arranged at the upper end of the side wall of the other opposite side of the protective cover (2), a limiting assembly (5) is arranged in the socket (4), a plug connector (6) is arranged below one end, away from the hinge position of the protective cover (3) and the protective cover (2), of the protective cover (3), and when the protective cover (3) is covered on the opening of the protective cover (2), the plug connector (6) can be just inserted into the socket (4) and is clamped by the limiting assembly (5); the lower side of the arm supporting plate (1) is provided with a plurality of groups of fixing belts (7), and each group of fixing belts (7) can be adhered and fixed through magic tape.

2. The housing device of a mining hand-held terminal according to claim 1, wherein: the width of the opening above the protective shell (2) is between the width of the outer contour of the mining handheld terminal and the width of the display area of the mining handheld terminal, the width of the inner space of the protective shell (2) is equal to the width of the outer contour of the mining handheld terminal, and the length of the inner space of the protective shell (2) is larger than the length of the outer contour of the mining handheld terminal; one end of the protective shell (2) along the length direction is inserted with a plug head (8).

3. The housing device of a mining hand-held terminal according to claim 2, wherein: the plug (8) comprises a rubber plug (81) and a baffle (82), the length direction of the rubber plug (81) is larger than the width of a mine hand-held terminal, the width of the rubber plug (81) is equal to the length of the inner space of the protective shell (2), the length of the baffle (82) is larger than the width of the inner space of the protective shell (2), and the baffle (82) is close to one side of the protective shell (2) and fixedly connected with the rubber plug (81).

4. A housing device for a mining hand-held terminal according to claim 3, characterized in that: one end of the baffle (82) in the length direction is connected with the protective shell (2) through an elastic rope (9).

5. The housing device of a mining hand-held terminal according to claim 1, wherein: the limiting assembly (5) comprises a spring piece (51), the lower end of the spring piece (51) is fixedly connected with the inner bottom of the faucet (4), a limiting stop (52) extending towards the outer side of the protective shell (2) is arranged at the upper end of the spring piece (51), the upper end of the limiting stop (52) is of a circular arc structure, a driving unit (53) is arranged at the outer side of the middle position of the spring piece (51), and the driving unit (53) can change the position of the limiting stop (52) at the upper end of the spring piece (51).

6. The housing device for a mining hand-held terminal according to claim 5, wherein: one side of the lower end of the plug connector (6) close to the hinge joint of the protective cover (3) and the protective shell (2) is provided with a clamping block (10).

7. The housing device for a mining hand-held terminal of claim 6, wherein: the driving unit (53) comprises a first moving rod (531) and a second moving rod (532), the first moving rod (531) and the second moving rod (532) are fixedly connected at one end close to each other, and a button (533) is arranged at the other end of the first moving rod (531);

the diameter of second movable rod (532) is less than first movable rod (531), be equipped with on the preceding lateral wall of bell and spigot (4) with first movable rod (531) diameter equal through hole (534), second movable rod (532) keep away from behind first movable rod (531) one end pass through hole (534) with spring leaf (51) butt, the cover is equipped with reset spring (535) on second movable rod (532), one end of reset spring (535) with first movable rod (531) are close to second movable rod (532) one end fixed connection, reset spring (535) other end and support (536) fixed connection, support (536) with the inner wall fixed connection of bell and spigot (4), support (536) cover are established on second movable rod (532) and between the two sliding connection.