CN112178800B

CN112178800B - Anti-dismantling structure

Info

Publication number: CN112178800B
Application number: CN202011060994.8A
Authority: CN
Inventors: 孙明雷; 邹冬球; 温清奎
Original assignee: Ningbo Kanghanrui Electric Appliance Co ltd
Current assignee: Ningbo Kanghanrui Electric Appliance Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-01-04
Anticipated expiration: 2040-09-30
Also published as: CN112178800A

Abstract

The invention belongs to the technical field of connecting accessories, and particularly relates to an anti-disassembly structure. The anti-dismantling structure comprises a first shell, a second shell and a cavity; the connecting mechanism further comprises a connecting mechanism, wherein a first connecting part of the connecting mechanism comprises a first connecting piece, a second connecting part of the connecting mechanism comprises a front connecting piece and a rear connecting piece, and the arrangement directions of the front connecting piece and the rear connecting piece are different; after the first connecting piece is matched with the front connecting piece, the first connecting piece and the front connecting piece are locked to form a completely locked anti-dismounting structure; the front connecting piece is separated from the first connecting piece, and after the first shell piece is rotated by a preset angle, the first shell piece can be matched with the rear connecting piece, and the two shell pieces are matched again to form a completely locked anti-dismounting structure. The anti-dismantling structure has the advantages of compact structure, easy dismantling, secondary use and the like, and is favorable for large-scale popularization and application.

Description

Anti-dismantling structure

Technical Field

The invention belongs to the technical field of connecting fittings, and particularly relates to an anti-disassembly structure capable of being applied to protection of pipeline joints such as air conditioner pipelines.

Background

Connection fittings, such as nuts, are common components in industrial and household appliances, through which two separate parts can be connected together to be fixed or to form an integral structure to function. For example, two successive nuts are used in air conditioning ducts to connect copper pipes together.

Although the coupling nut can achieve the above-mentioned functions, in this case, anyone can perform operations such as disassembling and assembling it, which has negative effects in some specific cases; for example, unauthorized disassembly by non-professionals may lead to equipment failure, or the media in the piping may be harmful to the environment or personnel, and unauthorized disassembly may lead to environmental or personnel safety issues.

It is therefore necessary to protect the joint of the above-mentioned connection fittings from unauthorized removal. Therefore, a common solution in the prior art is to redesign the connection structure so that the connection structure needs a special tool to be detachable, and although the problem can be solved by the method, a brand new anti-detaching structure needs to be designed and produced, so that the cost is high and the application and popularization are not facilitated.

Disclosure of Invention

The invention aims to provide an anti-disassembly structure which is compact in structure, easy to disassemble and assemble and capable of being used for a second time.

As a first aspect of the present invention, a detachment prevention structure is provided, which includes a first casing and a second casing, wherein a cavity is formed between the first casing and the second casing after the first casing and the second casing are matched; the anti-dismantling structure further comprises a connecting mechanism, and the connecting mechanism comprises a first connecting part and a second connecting part which are respectively arranged on the first shell piece and the second shell piece.

The first connecting part comprises a first connecting piece, the second connecting part comprises a front connecting piece and a rear connecting piece, and the arrangement directions of the front connecting piece and the rear connecting piece are different; the first connector cooperates with the front connector or the rear connector to lock the two housing members.

After the first connecting piece is matched with the front connecting piece, the first shell piece and the second shell piece are locked to form a completely locked anti-dismounting structure; and separating the front connecting piece from the first connecting piece, and enabling the first shell piece to rotate by a preset angle, and then enabling the first connecting piece to be matched with the rear connecting piece, so that the first shell piece and the second shell piece are matched again to form a completely locked anti-dismounting structure. The preset angle is the angle difference between the front connecting piece and the rear connecting piece, namely the angle required by the first connecting piece to rotate when the first connecting piece is matched with the front connecting piece to be matched with the rear connecting piece.

Preferably, the front connecting piece and the rear connecting piece are arranged in opposite directions and form an angle of 180 degrees; the front connecting piece is damaged to be separated from the first connecting piece, and the first shell piece is rotated by 180 degrees and then matched with the rear connecting piece, so that the first shell piece and the second shell piece are matched again to form a completely locked anti-dismounting structure.

Preferably, the first connecting member includes a clamping column and a clamping block, one end of the clamping column is connected with the clamping block, and the other end of the clamping column is connected to the first shell member.

Preferably, the front connecting piece and the rear connecting piece comprise matching holes and matching blocks, and the arrangement directions of the matching holes and the matching blocks are different; the anti-disassembly structure further comprises a locking block.

Preferably, the second connecting part is provided with a plurality of strip-shaped grooves, and the locking block is arranged in at least one strip-shaped groove to form the front connecting piece or the rear connecting piece; a portion of the strip groove is formed as a mating hole and an edge of the strip groove is formed as a mating block.

As preferably, the locking piece is close to the one end setting in bar groove, and it is cut apart the one end in bar groove and is formed into the mating holes, and this tip forms into the mating blocks simultaneously, and the fixture block of first connecting piece cooperatees with the mating blocks after passing this mating holes, and the card post is spacing by mating blocks and locking piece to make two shell spares locked completely.

Preferably, the strip-shaped groove is disposed to penetrate the second connecting portion, and the second casing is correspondingly provided with a notch portion to expose the locking block, so that the locking block is broken from the notch portion to release the complete locking.

Preferably, the fixture block is further provided with a first guide part and a second guide part, and the first guide part and the second guide part are preferably a first inclined surface and a second inclined surface respectively; the first inclined plane is matched with the edge of the matching hole to play a guiding role when the clamping block is matched into the matching hole, and the second inclined plane is tightly matched with the matching block through the inclined plane after being matched with the matching block.

Preferably, the stud and the latch are formed integrally with the first housing member.

Preferably, four first connecting pieces are arranged on two sides of the first shell, two first connecting pieces are arranged on each side of the cavity, and the directions of the clamping blocks 412 of all the first connecting pieces are the same; the number of the strip-shaped grooves is four, the strip-shaped grooves are respectively arranged on two sides of the second shell, and each side of the containing cavity is provided with two strip-shaped grooves.

In the two strip-shaped grooves on the left side, the locking block is arranged on the left side of the strip-shaped groove; in the two strip-shaped grooves on the right side, the locking block is arranged on the right side of the strip-shaped groove; the left side parts of the four strip-shaped grooves form a front connecting piece, and the right side parts of the four strip-shaped grooves form a rear connecting piece.

Preferably, the number of the locking blocks is four, the locking blocks are respectively arranged in each strip-shaped groove and are respectively positioned on the left side and the right side.

Preferably, the first connecting part further comprises a limiting column which is matched with the locking block to lock the first casing piece and the second casing piece in the horizontal direction; and the first connecting piece is matched with the front connecting piece or the rear connecting piece, so that the first shell piece and the second shell piece are locked in the vertical direction, and the two shell pieces are completely locked.

Preferably, the limiting columns and the locking blocks are respectively provided with two limiting columns and two locking blocks, are respectively arranged on two sides of the containing cavity and are symmetrically arranged.

Preferably, the locking block and the front connecting piece or the rear connecting piece are formed in different strip-shaped grooves.

Preferably, the locking block is arranged on the outer side of the second shell member and is not positioned in the strip-shaped groove.

A secondary anti-disassembly method of a connecting nut comprises the following steps:

and under the primary locking state, the first connecting piece of the first shell piece is matched with the front connecting piece of the second shell piece, and the first shell piece and the second shell piece are locked to form a completely locked anti-dismounting structure.

Separating the first connecting piece from the front connecting piece, and unlocking the fully locked state of the first connecting piece and the front connecting piece by destroying a locking block at the front connecting piece; and translating the first shell relative to the second shell so as to completely unlock the first shell and the second shell, separating the first shell from the second shell and exposing the connecting nut arranged in the cavity between the first shell and the second shell.

After the connecting nut is maintained, the first shell piece is rotated for a preset angle relative to the second shell piece, and then the first connecting piece is matched with the rear connecting piece, so that the first shell piece and the second shell piece are matched again to form a completely-locked anti-dismounting structure.

Preferably, the first connecting piece comprises a clamping column and a clamping block, one end of the clamping column is connected with the clamping block, and the other end of the clamping column is connected to the first shell piece; preceding connecting piece and back connecting piece include mating holes and cooperation piece, and the mating holes of both and the setting direction of cooperation piece are different.

Preferably, the number of the first connecting pieces is four, the first connecting pieces are respectively arranged on two sides of the first shell piece, two first connecting pieces are respectively arranged on each side of the accommodating cavity, and the clamping blocks of all the first connecting pieces face the same direction; the number of the strip-shaped grooves is four, the strip-shaped grooves are respectively arranged on two sides of the second shell, and each side of the containing cavity is provided with two strip-shaped grooves.

According to the anti-dismantling structure and the secondary anti-dismantling method, the anti-dismantling structure can allow two times of assembly through a brand new structural design, so that the use cost of the anti-dismantling structure is greatly reduced; and its operation is very convenient, and two shell spares of initial cooperation position cooperate and can accomplish complete locking, and the connecting piece can make two shell spares separation before destroying when needing the dismouting, allows the professional to carry out corresponding maintenance operation, and after the maintenance is accomplished, rotatory a certain shell spare makes two shell spares cooperate again and realize complete locking. The anti-dismantling structure has the advantages of compact structure, easy dismantling, secondary use and the like, and is favorable for large-scale popularization and application.

Drawings

FIG. 1 is a schematic structural view of a tamper-evident structure according to an embodiment of the present invention;

FIG. 2 is an exploded view of the tamper-evident structure of the embodiment of FIG. 1;

FIG. 3 is a schematic view of the second housing member of the embodiment of FIG. 1;

FIG. 4 is a schematic view of the first housing component of the embodiment of FIG. 1;

FIG. 5 is a side view of the embodiment of FIG. 1;

FIG. 6 is a cross-sectional view AA in FIG. 5, which is a schematic illustration from a front perspective;

FIG. 7 is a cross-sectional view of BB of FIG. 5, which is a schematic view from a front view angle;

FIG. 8 is an enlarged partial view of FIG. 7;

FIG. 9 is a schematic view of a secondary snap-fit of the tamper-evident structure of the embodiment of FIG. 1;

FIG. 10 is a schematic structural view of a first housing member of another embodiment;

fig. 11 is a cross-sectional view of the first housing part in cooperation with the second housing part of the embodiment of fig. 10, which is a cross-sectional view BB similar to fig. 7.

Detailed Description

In order that those skilled in the art will better understand the invention and thus more clearly define the scope of the invention as claimed, it is described in detail below with respect to certain specific embodiments thereof. It should be noted that the following is only a few embodiments of the present invention, and the specific direct description of the related structures is only for the convenience of understanding the present invention, and the specific features do not of course directly limit the scope of the present invention. Such alterations and modifications as are made obvious by those skilled in the art and guided by the teachings herein are intended to be within the scope of the invention as claimed.

An anti-disassembly structure of an air conditioner pipeline connecting nut is applied to the air conditioner pipeline connecting position to forbid unauthorized operation to cause safety and environmental problems, and particularly relates to a reusable anti-disassembly structure.

The anti-disassembly structure comprises a first shell 100 and a second shell 200, wherein a containing cavity 300 is formed between the first shell 100 and the second shell 200 after the first shell and the second shell are matched, so that a connecting nut is arranged in the containing cavity to achieve the purpose of locking the connecting nut. After the two housing members are engaged, a first end portion 310 and a second end portion 320 are formed, and the first end portion 310 and the second end portion 320 are respectively provided with an opening portion 302. When the anti-disassembly structure is used, the connecting nut of the air conditioner pipeline is connected and fixed, the anti-disassembly structure is matched at the connecting nut, and the connecting nut is coated and locked to avoid actions such as unauthorized disassembly of the connecting nut; after the fitting, the pipe is fitted through the opening 302.

To connect the first casing 100 and the second casing 200, the detachment prevention structure has a connection mechanism including a first connection portion 401 and a second connection portion 402 respectively provided on the first casing 100 and the second casing 200, and the first connection portion 401 and the second connection portion 402 cooperate to fixedly connect the first casing 100 and the second casing 200 so that they are completely locked and locked from moving in any direction.

The first connection portion 401 includes a first connection member 410, the second connection portion 402 includes a front connection member 420 and a rear connection member 430, and the front connection member 420 and the rear connection member 430 have the same structure but different arrangement directions. The first connector 410 can cooperate with the front connector 420 or the rear connector 430 to lock the two housing members.

In one embodiment, the front and

rear connectors

420 and 430 are disposed in opposite directions, i.e., at an angle of 180 °; in the case that the first connecting member 410 can be engaged with the front connecting member, the first connecting member 410 can be positioned to engage with the rear connecting member 430 by rotating the first connecting portion 401 by an angle of 180 °.

In a preferred embodiment, the first connecting member 410 includes a stud 411 and a latch 412, one end of the stud 411 is connected to the latch 412, and the other end is connected to the first housing member 100; the posts 411 and the latches 412 are preferably integrally formed with the first housing member 100. The front connecting piece and the rear connecting piece both comprise a matching hole 421 and a matching block 423, and the arrangement directions of the matching hole 421 and the matching block 423 are different. In addition, the tamper structure further includes a locking block 422.

When the first connecting member 410 is matched with the front connecting member or the rear connecting member, the clamping column 411 is matched with the matching hole 421, the clamping block 412 is matched with the matching block 423, and the locking block 422 is matched behind the clamping column 411, so that the first connecting member 410 is completely locked by the front connecting member 420 or the rear connecting member 430, the first shell member 100 and the second shell member 200 cannot move in any direction (except for slight movement which does not affect functions and is caused by a tiny gap of course), and the anti-disassembly structure cannot be opened to operate the connecting nut.

In other embodiments, a plurality of bar-shaped grooves 403 are formed on the second connecting portion 402, and the locking block 422 is disposed in at least one bar-shaped groove to form the front connecting member 420 or the rear connecting member 430; that is, a part of the groove 403 is formed as the fitting hole 421, and an edge (e.g., an end) of the groove is formed as the fitting block 423. For example, the locking block 422 is disposed near one end of the strip-shaped groove 403, and divides one end of the strip-shaped groove 403 into a fitting hole 421, and the end of the strip-shaped groove 403 is formed into a fitting block 423, the latch block 412 of the first connecting member 410 passes through the fitting hole 421 and then fits with the fitting block 423, and the latch column 411 is limited by the fitting block 423 and the locking block 422, so that the two housing members are completely locked.

In other embodiments, the strip-shaped groove 403 is disposed through the second connecting portion 402, and the second casing 200 is correspondingly provided with a notch portion 404, so that the locking block 422 is exposed, and a maintenance worker can see through the notch portion 404 and operate the locking block 422, for example, cut off the locking block 422, so as to release the above-mentioned complete locking.

When the maintenance operation needs to be performed on the connecting nut, the operation is performed from the direction of the notch portion 404, the locking block 422 is cut off, the first connecting piece 410 of the first shell 100 can be translated in the strip-shaped groove 403, and after the first connecting piece is translated backwards for a certain distance, the clamping block 412 is separated from the matching block 423, the first connecting piece 410 can be moved out of the strip-shaped groove 403 serving as a front connecting piece, the first shell 100 and the second shell 200 are unlocked and opened, the connecting nut of the pipeline is exposed, and the maintenance personnel can perform the maintenance operations such as dismounting and replacement on the connecting nut. After the maintenance is completed, the first casing 100 is rotated 180 °, and then the two casings are fastened, and the first connecting member 410 of the two casings is engaged with the rear connecting member in the other direction to lock the two casings, so as to achieve the complete locking of the two casings. Of course, for improved security, a removable cover may be provided at the notch 404, and the removable cover may be removed or broken when necessary, so as to allow the locking block 422 to be operated.

In other embodiments, the latch 412 further has a first guiding portion and a second guiding portion, and the first guiding portion and the second guiding portion are respectively a first inclined surface 413 and a second inclined surface 414. The first inclined surface 413 can be matched with the edge of the matching hole 421 to play a guiding role when the fixture block 412 is matched into the matching hole 421, so that the matching between the first inclined surface and the second inclined surface is facilitated, and the second inclined surface 414 can be tightly matched with the matching block 423 through the inclined surface after being matched with the matching block 423. Of course, the two guiding portions may be curved surfaces.

In other embodiments, there are four first connectors 410, which are respectively disposed on two sides of the first housing member 100, i.e. two first connectors 410 are disposed on each side of the cavity 300, and the latch 412 of all the first connectors 410 are oriented in the same direction. Meanwhile, there are four strip-shaped grooves 403, which are respectively disposed on two sides of the second casing 100, that is, each side of the cavity 300 is provided with two strip-shaped grooves 403; in the two left strip-shaped grooves 403, the locking block 422 is disposed on the left side of the strip-shaped groove 403, and in the two right strip-shaped grooves 403, the locking block 422 is disposed on the right side of the strip-shaped groove 403. The left side portions of the four bar grooves 403 are formed as front links, and the right side portions of the four bar grooves 403 are formed as rear links.

In the first locking state, the four first connecting members 410 are respectively fitted to the left sides of the four bar-shaped grooves 403, and at least one locking block 422 is disposed in the bar-shaped groove 403 on the left side to achieve complete locking of the two housing members. When the connecting nut needs to be maintained, the acting left locking block 422 is damaged, the first shell 100 can be unlocked after being translated, the two shells are buckled after rotating 180 degrees, and the first connecting piece 410 is matched with the right rear connecting piece to realize the purpose of secondary locking.

Preferably, four locking blocks 422 are provided, which are respectively disposed in each of the bar-shaped grooves 403 and are respectively disposed on the left side and the right side.

In addition, although the locking block 422 is a projection provided on the second casing 200 in the above embodiments, and can be broken by cutting or the like to unlock the two casings, the safety of the anti-detachment structure cannot be guaranteed; in fact, if be applied to when having the scene of higher safety structure, can borrow the mode that specialized tool opened and set up locking piece 422 into the structure that needs pass through the special tool side and can destroy to promote its whole security, specifically can set up as required, and be not limited.

In the above embodiments, the vertical limiting and the horizontal limiting are achieved by the first connecting member 410 being stressed, but this is not necessary.

In other embodiments, the first connecting portion 401 further includes a limiting post 415, which cooperates with the locking block 422 to lock the first casing member 100 and the second casing member 200 in the horizontal direction; and the first connector 410 is engaged with the front connector 420 or the rear connector 430 to lock the first housing member 100 and the second housing member 200 in the up-down direction. Thus, the two housing parts are completely locked.

That is, the locking column 411 of the first connecting member 410 is independently a limiting column and is disposed to cooperate with the locking block 422.

Preferably, four strip-shaped grooves 403 are formed in the second connecting portion 402 and are respectively disposed on two sides of the cavity 300, a front connecting member is formed on the left side of each strip-shaped groove 403, a rear connecting member is formed on the right side of each strip-shaped groove 403, and four first connecting members 410 are correspondingly disposed in the same direction; at this time, the locking block 422 is disposed in the middle of the bar-shaped groove 403, and the limiting column 415 is disposed between the two first connecting members 410 on the same side and is matched with the locking block 422.

As for the number of the limiting columns 415 and the locking blocks 422, at least one limiting column is required in principle; in practice, there are two, preferably symmetrically disposed, spaced on either side of the chamber 300.

In other embodiments, the locking block 422 and the front link 420 or the rear link 430 are formed in different bar-shaped grooves; for example, two strip-shaped grooves parallel to each other are formed on the second housing 200, one of which is provided for the front connector 420 or the rear connector 430, and the other is provided for the locking block 422.

In other embodiments, the locking block 422 is disposed outside the second casing 200, that is, it is not located in the strip-shaped groove 403, and the specific location of the locking block 422 may be set according to practical situations, and is not limited.

A secondary tamper-evident method of connecting nuts, the method comprising:

in the primary locking state, the first connector 410 of the first housing member 100 is engaged with the front connector 420 of the second housing member 200, locking the first housing member 100 and the second housing member 200 to form a completely locked detachment prevention structure.

Separating the first link 410 from the front link 420, such as by breaking a lock block 422 at the front link 420 to unlock the fully locked state of the two; the first casing 100 is translated relative to the second casing 200 so that the first casing 100 and the second casing 200 are completely unlocked, the first casing 100 is separated from the second casing 200, and the connection nut disposed in the cavity 300 therebetween is exposed.

After the maintenance operation is performed on the coupling nut, the first housing member 100 is rotated by a predetermined angle with respect to the second housing member 200, and then the first coupling member 410 is coupled to the rear coupling member 430, so that the first housing member 100 is re-coupled to the second housing member 200 to form a completely locked anti-removal structure.

Preferably, the front link 420 and the rear link 430 are disposed in opposite directions, and are disposed at an angle of 180 °; the front connector 420 is broken, for example, the front connector 420 is cut off to be separated from the first connector 410, and the first housing member 100 is rotated 180 ° to be engaged with the rear connector 430, so that the first housing member 100 is re-engaged with the second housing member 200 to form a completely locked detachment prevention structure.

Of course, the method may also be based on the anti-detachment structure described in any of the above embodiments, and thus has a corresponding structure and operation method, which are not described herein again.

Claims

1. An anti-disassembly structure comprises a first shell piece (100) and a second shell piece (200), wherein a cavity (300) is formed between the first shell piece (100) and the second shell piece (200) after the first shell piece (100) and the second shell piece (200) are matched; the anti-disassembly structure further comprises a connecting mechanism, wherein the connecting mechanism comprises a first connecting part (401) and a second connecting part (402) which are respectively arranged on the first shell piece (100) and the second shell piece (200); it is characterized in that the preparation method is characterized in that,

the first connecting part (401) comprises a first connecting piece (410), the second connecting part (402) comprises a front connecting piece (420) and a rear connecting piece (430), and the arrangement directions of the front connecting piece (420) and the rear connecting piece (430) are different; the first connector (410) cooperates with the front connector (420) or the rear connector (430) to lock the two housing members (100, 200);

after the first connecting piece (410) is matched with the front connecting piece (420), the first shell piece (100) and the second shell piece (200) are locked to form a completely locked anti-dismantling structure; and separating the front connecting piece (420) from the first connecting piece (410), and after the first shell piece (100) is rotated by a preset angle, the first connecting piece (410) is matched with the rear connecting piece (430), so that the first shell piece (100) and the second shell piece (200) are matched again to form a completely locked anti-dismounting structure.

2. Tamper evident structure as claimed in claim 1, characterized in that said front connector (420) and rear connector (430) are arranged in opposite directions, arranged at an angle of 180 °; the front connecting piece (420) is broken to be separated from the first connecting piece (410), and the first connecting piece (410) is matched with the rear connecting piece (430) after the first shell piece (100) is rotated by 180 degrees, so that the first shell piece (100) and the second shell piece (200) are matched again to form a completely locked anti-dismantling structure.

3. The tamper structure according to claim 1 or 2, wherein the first connecting member (410) comprises a stud (411) and a latch (412), one end of the stud (411) being connected to the latch (412) and the other end being connected to the first housing member (100);

the front connecting piece (420) and the rear connecting piece (430) comprise a matching hole (421) and a matching block (423), and the setting directions of the matching hole (421) and the matching block (423) are different; the anti-disassembly structure further comprises a locking block (422) which is arranged at the front connecting piece (420) and the rear connecting piece (430) respectively, when the first connecting piece (410) is matched with the front connecting piece (420) or the rear connecting piece (430), the locking block (422) acts on the rear of the clamping column (411) to lock the first connecting piece (410) and the front connecting piece (420) or the rear connecting piece (430) to form a completely locked anti-disassembly structure;

and (3) breaking the locking block at the front connecting piece (420) to separate the locking block from the first connecting piece (410), and after the first shell piece (100) rotates for 180 degrees, the first connecting piece (410) and the rear connecting piece (430) are matched to ensure that the first shell piece (100) and the second shell piece (200) are matched again to form a completely locked anti-dismantling structure.

4. The tamper structure according to claim 3, wherein the second connecting portion (402) is provided with a plurality of strip-shaped grooves (403), and the locking block (422) is disposed in at least one of the strip-shaped grooves (403) to form the front connecting member (420) or the rear connecting member (430); a part of the strip-shaped groove (403) is formed as a fitting hole (421), and the edge of the strip-shaped groove (403) is formed as a fitting block (423).

5. The tamper structure according to claim 4, wherein the locking block (422) is disposed near one end of the strip-shaped groove (403) and divides one end of the strip-shaped groove (403) into a fitting hole (421), and an end of the strip-shaped groove (403) is formed into a fitting block (423), the latch block (412) of the first connecting member (410) passes through the fitting hole (421) and then fits with the fitting block (423), and the latch post (411) is limited by the fitting block (423) and the locking block (422), so that the first casing member (100) and the second casing member (200) are completely locked.

6. The tamper structure according to claim 5, wherein the strip-shaped groove (403) is provided through the second connecting portion (402), and a notch portion (404) is correspondingly provided on the second housing member (200) to expose the locking block (422), so that the locking block (422) is broken from the notch portion (404) to release the complete locking.

7. The structure of claim 3, wherein the fixture block (412) is further provided with a first guiding portion and a second guiding portion, and the first guiding portion and the second guiding portion are respectively a first inclined surface (413) and a second inclined surface (414); the first inclined surface (413) is matched with the edge of the matching hole (421) to play a guiding role when the fixture block (412) is matched into the matching hole (421), and the second inclined surface (414) is tightly matched with the matching block (423) through the inclined surface of the second inclined surface after being matched with the matching block (423).

8. A tamper-evident structure as claimed in claim 3, wherein the stud (411) and the latch (412) are provided as an integral part of the first housing member (100).

9. The tamper structure according to claim 4, wherein the first connecting members (410) are four in number and are respectively arranged on two sides of the first shell member (100), two first connecting members (410) are respectively arranged on each side of the cavity (300), and the clamping blocks (412) of all the first connecting members (410) are oriented in the same direction; the number of the strip-shaped grooves (403) is four, the four strip-shaped grooves are respectively arranged on two sides of the second shell (100), and two strip-shaped grooves (403) are respectively arranged on each side of the cavity (300);

in the two strip-shaped grooves (403) on the left side, the locking block (422) is arranged on the left side of the strip-shaped groove (403); in the two strip-shaped grooves (403) on the right side, the locking block (422) is arranged on the right side of the strip-shaped groove (403); the left side parts of the four strip-shaped grooves (403) are formed into front connecting pieces (420), and the right side parts of the four strip-shaped grooves (403) are formed into rear connecting pieces (430).

10. The tamper structure according to claim 9, wherein four of the locking blocks (422) are provided in each of the strip-shaped grooves (403) on the left and right sides, respectively.

11. The tamper structure of claim 3, wherein the first connecting portion (401) further comprises a stopper (415) which is engaged with the locking piece (422) to lock the first casing member (100) and the second casing member (200) in a horizontal direction; the first connecting piece (410) is matched with the front connecting piece (420) or the rear connecting piece (430), so that the first shell piece (100) and the second shell piece (200) are locked in the vertical direction, and the two shell pieces are completely locked;

the limiting columns (415) and the locking blocks (422) are respectively provided with two limiting columns which are respectively arranged at two sides of the accommodating cavity (300) and are symmetrically arranged.

12. The tamper structure according to claim 4, characterized in that the blocking block (422) and the front connector (420) or the rear connector (430) are formed in different strip-shaped grooves (403); or the like, or, alternatively,

the locking block (422) is arranged on the outer side of the second shell piece (200) and is not positioned in the strip-shaped groove (403).

13. A secondary anti-dismounting method for a connecting nut is characterized by comprising the following steps:

in a primary locking state, the first casing member (100) and the second casing member (200) are locked by a connection mechanism composed of a first connection part (401) and a second connection part (402) which are respectively arranged on the first casing member (100) and the second casing member (200), the first connection part (401) comprises a first connection piece (410), and the second connection part (402) comprises a front connection piece (420) and a rear connection piece (430); the first connecting piece (410) of the first shell piece (100) is matched with the front connecting piece (420) of the second shell piece (200) to lock the first shell piece (100) and the second shell piece (200) to form a completely locked anti-dismantling structure;

separating the first connecting piece (410) from the front connecting piece (420), and unlocking the first connecting piece and the front connecting piece by breaking a locking block (422) at the front connecting piece (420); translating the first shell (100) relative to the second shell (200) so as to completely unlock the first shell (100) and the second shell (200), separating the first shell (100) from the second shell (200) and exposing a connecting nut arranged in a cavity (300) between the first shell and the second shell;

after the connecting nut is maintained, the first shell piece (100) is rotated relative to the second shell piece (200) by a preset angle, and the first connecting piece (410) is matched with the rear connecting piece (430), so that the first shell piece (100) and the second shell piece (200) are matched again to form a completely-locked anti-dismounting structure.

14. The method of claim 13, wherein the front connector (420) and the rear connector (430) are disposed in opposite directions, at an angle of 180 °; the front connecting piece (420) is broken to be separated from the first connecting piece (410), and the first shell piece (100) is rotated by 180 degrees and then is matched with the rear connecting piece (430) again, so that the first shell piece (100) and the second shell piece (200) are matched again to form a completely locked anti-disassembly structure.

15. The method according to claim 14, wherein the first connecting member (410) comprises a stud (411) and a latch (412), the stud (411) being connected to the latch (412) at one end and to the first housing member (100) at the other end; the front connecting piece (420) and the rear connecting piece (430) comprise a matching hole (421) and a matching block (423), and the setting directions of the matching hole (421) and the matching block (423) are different.

16. The method according to claim 15, wherein the second connecting portion (402) is provided with a plurality of grooves (403), and the locking block (422) is disposed in at least one of the grooves (403) to form the front connecting member (420) or the rear connecting member (430); a part of the strip-shaped groove (403) is formed as a fitting hole (421), and the edge of the strip-shaped groove (403) is formed as a fitting block (423).

17. The method according to claim 16, wherein the locking piece (422) is provided near one end of the strip-shaped groove (403) and divides one end of the strip-shaped groove (403) into a fitting hole (421), and an end of the strip-shaped groove (403) is formed into a fitting piece (423), the latch block (412) of the first connecting member (410) passes through the fitting hole (421) and then fits with the fitting piece (423), and the latch post (411) is retained by the fitting piece (423) and the locking piece (422), so that the first housing member (100) and the second housing member (200) are completely locked.

18. The method according to claim 17, wherein the strip-shaped groove (403) is provided through the second connecting portion (402), and a notch portion (404) is correspondingly provided on the second housing member (200) to expose the locking piece (422), so that the locking piece (422) is broken from the notch portion (404) to release the complete locking.

19. The method according to claim 16, wherein four first connecting members (410) are provided on each side of the first housing member (100), two first connecting members (410) are provided on each side of the receiving cavity (300), and the latch members (412) of all the first connecting members (410) are oriented in the same direction; the number of the strip-shaped grooves (403) is four, the four strip-shaped grooves are respectively arranged on two sides of the second shell (100), and two strip-shaped grooves (403) are respectively arranged on each side of the cavity (300);

20. The method according to claim 19, wherein four locking blocks (422) are provided, which are arranged in each of the strip-shaped grooves (403) and are located on the left side and the right side, respectively.