CN219226189U

CN219226189U - Binding post and circuit breaker

Info

Publication number: CN219226189U
Application number: CN202320724318.9U
Authority: CN
Inventors: 赵子恒; 徐大胜; 贾超举; 辛娜
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-06-20
Anticipated expiration: 2033-04-04

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a wiring terminal and a circuit breaker, wherein the wiring terminal comprises a first connector, a second connector, a shell and a connecting wire, the shell is provided with a containing cavity, a first mounting hole and a second mounting hole which are communicated with the containing cavity, the first connector is inserted into the first mounting hole and fixedly connected with the shell, the second connector is inserted into the second mounting hole and fixedly connected with the shell, and the shell is fixedly arranged on the circuit breaker body; the connecting wire sets up in holding the chamber, and the one end and the first connector electricity of connecting wire are connected, and the other end is connected with the second connector electricity. Because binding post is provided with the casing, so the connecting wire all sets up inside the casing, and then the staff is when taking apart the shell maintenance circuit breaker body apart, and the connecting wire can not interfere the maintenance of staff to the circuit breaker body.

Description

Binding post and circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a wiring terminal and a circuit breaker.

Background

In a power supply and distribution network, a low-voltage circuit breaker plays a role in breaking a power supply and protecting the power supply and electric equipment, namely, avoiding the damage of the power supply and the electric equipment caused by faults such as overload, undervoltage, short circuit, grounding and the like. The low-voltage circuit breaker outputs the internal state signal of the circuit breaker to the outside through the secondary wiring terminal positioned at the front part of the low-voltage circuit breaker, and transmits the external control signal to the internal control part of the circuit breaker, so that the mutual transmission of the signals between the inside and the outside of the circuit breaker is realized.

The prior art patent KR100931774B1 discloses a connector of a circuit breaker connecting terminal, and the patent discloses that a fixing plate and a fixing bracket are fixedly arranged on a circuit breaker main body inside a circuit breaker shell, a first connector is fixed on the fixing plate, a second connector is fixed on the fixing bracket, the first connector and the second connector are connected through a connecting wire, the first connector is connected with an internal load, and the second connector is connected with an external power supply.

Because the first connector is provided with a plurality of, the second connector is provided with a plurality of, and then connects through a plurality of connecting wires between first connector and the second connector, and a plurality of connecting wires set up in the circuit breaker casing, and then lead to the circuit in the circuit breaker casing comparatively disordered, and the staff is when maintaining the circuit breaker body, and the connecting wire very easily interferes the staff to the maintenance of circuit breaker body. In addition, the connector has a lot of parts used in fixing, so that the connector is complicated to install and has low production and assembly efficiency.

Disclosure of Invention

The utility model aims at: the wiring terminal and the circuit breaker are provided, so that the problems that a plurality of connecting wires are arranged in a circuit breaker shell, lines in the circuit breaker shell are disordered, workers are very easy to interfere with the maintenance of the circuit breaker body by the connecting wires when the circuit breaker body is maintained, and parts used by the connector in fixing are more, so that the mounting is complicated, and the production and assembly efficiency is low are solved.

In one aspect, the present utility model provides a terminal block comprising:

a first connector;

a second connector;

the circuit breaker comprises a shell, a first connector and a second connector, wherein the shell is fixedly arranged on a circuit breaker body and is provided with a containing cavity, a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are communicated with the containing cavity, the first connector is arranged in the containing cavity, one end of the first connector is inserted into the first mounting hole, and the second connector is arranged in the containing cavity, and one end of the second connector is inserted into the second mounting hole;

the connecting wire is arranged in the accommodating cavity, and two ends of the connecting wire are respectively electrically connected with the other end of the first connector and the other end of the second connector.

As the preferred technical scheme of binding post, first connector include first grafting body and set up in first joint spare on the first grafting body, the one end of first grafting body is inserted and is located first mounting hole, first joint spare with the casing joint.

As the preferred technical scheme of binding post, first joint spare includes first checkpost and first spacing arch, the relative both sides of first grafting body are equipped with respectively first checkpost, at least one of the relative both sides in addition of first grafting body is equipped with first spacing arch, first checkpost can pass first mounting hole and joint in on the lateral wall of casing, just first spacing arch support in on the inside wall of casing.

As the preferred technical scheme of binding post, first checkpost include one end with the lateral wall elastic connection's of first grafting body elastic connection elastic plate, the other end of elastic plate is equipped with can the joint in the dop on the casing lateral wall.

As the preferred technical scheme of binding post, the second connector includes second grafting body and engaging lug, the both sides that second grafting body one end is relative all are equipped with the engaging lug, the one end of second grafting body is inserted and is located the second mounting hole, the engaging lug with the casing can dismantle the connection.

As the preferable technical scheme of the wiring terminal, a second limiting protrusion is convexly arranged on the inner wall of the shell close to the second mounting hole;

the second connector further comprises a limit flange, the limit flange is arranged on the side wall of the second plug body in a protruding mode, the limit flange is abutted to the second limit protrusion along the axis direction of the second mounting hole, and the second plug body is flush with the outer wall surface of the shell.

As the preferred technical scheme of binding post, the casing includes the cover body and fixed plate, the fixed plate be used for with circuit breaker body coupling, first mounting hole with the second mounting hole set up in on the cover body, the cover body with the fixed plate can dismantle the connection and enclose and establish into hold the chamber.

As the preferable technical scheme of binding post, the cover body with one of fixed plate is provided with the second checkpost, another is provided with corresponding draw-in groove, the second checkpost joint in the draw-in groove.

As the preferable technical scheme of binding post, first connector still includes first electrically conductive spare, the second connector still includes the second electrically conductive spare, the both ends of connecting wire respectively with first electrically conductive spare and the second electrically conductive spare electricity is connected.

On the other hand, the utility model also provides a circuit breaker, which comprises a circuit breaker body, a shell, an internal load and a wiring terminal in any scheme, wherein the first connector is electrically connected with the internal load, the second connector is used for connecting an external power supply, and the shell is provided with an external window;

the shell comprises a first mounting surface and a second mounting surface, wherein the first mounting hole is formed in the first mounting surface, the second mounting hole is formed in the second mounting surface, the first mounting surface is arranged in the shell and is arranged at intervals with the shell, and the second mounting surface is arranged in the external window in a penetrating mode and is flush with the outer wall surface of the shell.

The beneficial effects of the utility model are as follows:

the utility model provides a wiring terminal which comprises a first connector, a second connector, a shell and a connecting wire, wherein the shell is provided with a containing cavity, a first mounting hole and a second mounting hole which are communicated with the containing cavity, the first connector is inserted into the first mounting hole and fixedly connected with the shell, the second connector is inserted into the second mounting hole and fixedly connected with the shell, and the shell is used for being fixedly arranged on a breaker body; the connecting wire sets up in holding the chamber, and the one end and the first connector electricity of connecting wire are connected, and the other end is connected with the second connector electricity. Because binding post is provided with the casing, so the connecting wire all sets up inside the casing, and then the staff is when taking apart the shell maintenance circuit breaker body apart, and the connecting wire can not interfere the maintenance of staff to the circuit breaker body. In addition, the wiring terminal can be installed by directly fixing the shell on the breaker body when being fixed, so that the installation is simple, and the production and assembly efficiency is high.

The circuit breaker includes shell, circuit breaker body, internal load and above-mentioned binding post, and internal load, binding post and circuit breaker body all set up in the shell, and first connector is used for being connected with the internal load electricity, and the second connector is used for connecting external power source, and above-mentioned setting makes the shell inside relatively clean and tidy, when the circuit breaker breaks down, is favorable to maintenance personnel's maintenance.

Drawings

FIG. 1 is a schematic diagram of an interrupt router according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a connection terminal according to an embodiment of the present utility model;

FIG. 3 is an exploded view of a terminal according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a cover according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a first connector according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a second connector according to an embodiment of the present utility model;

fig. 7 is a cross-sectional view of fig. 2.

In the figure:

100. a connection terminal; 200. a circuit breaker body;

1. a first connector; 11. a first plug body; 12. a first clip; 121. a chuck; 122. an elastic plate; 13. the first limiting protrusion; 14. a first conductive member;

2. a second connector; 21. a second plug body; 22. a limit flange; 23. a connecting lug; 24. a second conductive member;

3. a housing; 31. a cover body; 311. a first mounting hole; 312. a second mounting hole; 313. the second limiting bulge; 314. a clamping groove; 315. a first mounting surface; 316. a second mounting surface; 32. a fixing plate; 321. a second clip; 33. a receiving chamber.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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 intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 7, the present embodiment provides a connection terminal including a first connector 1, a second connector 2, a housing 3, and a connection wire, the housing 3 being fixedly disposed on a circuit breaker body 200, the housing 3 being provided with a housing cavity 33, and a first mounting hole 311 and a second mounting hole 312 communicating with the housing cavity 33, the first connector 1 being disposed in the housing cavity 33 with one end inserted into the first mounting hole 311, the second connector 2 being disposed in the housing cavity 33 with one end inserted into the second mounting hole 312; the connecting wire is disposed in the accommodating chamber 33, and one end of the connecting wire is electrically connected with the first connector 1 and the other end is electrically connected with the second connector 2. In the present embodiment, since the connection terminal 100 is provided with the housing 3, the first connector 1 and the second connector 2 are both female terminals. The first connector 1 is provided with a plurality of, and the second connector 2 is provided with a plurality of, and the connecting wire is provided with a plurality of, and the first connector 1 is connected to the one end one-to-one of a plurality of connecting wires, and the second connector 2 is connected to the other end one-to-one of a plurality of connecting wires. So the connecting wire all sets up inside casing 3, and then the staff is when taking apart shell maintenance circuit breaker body 200 apart, and the connecting wire can not interfere the maintenance of staff to circuit breaker body 200, and the connecting wire all sets up in casing 3, and then can promote the inside neatly nature of shell. In addition, since the connection terminal 100 can be mounted by directly fixing the housing 3 to the circuit breaker body 200 at the time of fixing, the mounting is simple and the production and assembly efficiency is high.

Optionally, the first connector 1 includes a first plug body 11 and a first clamping member disposed on the first plug body 11, where one end of the first plug body 11 is inserted into the first mounting hole 311, and the first clamping member is clamped with the housing 3. In this embodiment, the first clamping member is clamped with the housing 3, so that the first plug body 11 and the housing 3 are relatively fixed.

For the specific structure of the first clamping piece, optionally, the first clamping piece comprises a first clamp 12 and a first limiting protrusion 13, the first clamp 12 is respectively arranged on two opposite sides of the first plug body 11, the first limiting protrusion 13 is arranged on at least one of two opposite sides of the first plug body 11, the first clamp 12 can penetrate through the first mounting hole 311 and is clamped on the outer side wall of the shell 3, and the first limiting protrusion 13 is propped against the inner side wall of the shell 3. In this embodiment, the first clip 12 and the first limiting protrusion 13 are respectively located at two sides of the wall of the housing 3, and further, the first clip 12 and the first limiting protrusion 13 limit the first socket 11 to slide in the first mounting hole 311. In other embodiments, a groove is concavely formed in the housing on the peripheral side of the first mounting hole 311, and when the first plug 11 is inserted into the first mounting hole 311, the first connector is inserted into the groove and is clamped with the housing 3 along the axis of the first mounting hole 311, so that the first plug 11 is relatively fixed with the housing 3.

As for the specific structure of the first clip 12, alternatively, the first clip 12 has elasticity, and the first clip 12 has two states of being engaged with the housing 3 in the axial direction of the first mounting hole 311 and being disposed at a distance from the wall of the first mounting hole 311. Specifically, the first clip 12 includes an elastic plate 122 having one end elastically connected to the side wall of the first socket 11, and a chuck 121 capable of being clamped to the outer side wall of the housing 3 is disposed at the other end of the elastic plate 122. When the elastic plate 122 is not stressed, the elastic plate 122 enables the clamping head 121 to be arranged at intervals with the first plug body 11, at this time, the clamping head 121 is clamped with the shell 3 along the axial direction of the first mounting hole 311, when the clamping head 121 is subjected to the acting force of the hole wall of the first mounting hole 311 pointing to the first plug body 11, the clamping head 121 moves towards the direction close to the first plug body 11 against the elastic force of the elastic plate 122, and then the first plug body 11 can be pulled out from the first mounting hole 311.

In other embodiments, the first clip 12 may also be made of an elastic material, such as rubber.

In yet another embodiment, the first clip 12 includes a supporting plate, an elastic member and a clamping head 121, where one end of the supporting plate is glued to a side wall of the first socket 11, the other end of the supporting plate is fixedly connected to the clamping head 121, one end of the elastic member is fixedly connected to the supporting plate, the other end is fixedly connected to the first socket 11, when the supporting plate is not stressed, the elastic member drives the supporting plate to move, so that the clamping head 121 is spaced from the first socket 11, at this time, the clamping head 121 is clamped to the housing 3 along an axial direction of the first mounting hole 311, and when the clamping head 121 is stressed by a force directed to the first socket 11, the clamping head 121 moves towards a direction approaching the first socket 11 against an elastic force of the elastic member, so that the first socket 11 can be pulled out from the first mounting hole 311.

Optionally, the second connector 2 includes a second plug body 21 and a connection lug 23, the connection lug 23 is disposed on the second plug body 21, one end of the second plug body 21 is inserted into the second mounting hole 312, and the connection lug 23 is detachably connected with the housing 3. The connecting lugs 23 in this embodiment are provided with through holes through which bolts pass and are screwed with the housing 3. In other embodiments, the connection lugs 23 are snapped into engagement with the housing 3.

Optionally, a second limiting protrusion 313 is convexly arranged on the inner wall of the housing 3 near the second mounting hole 312; the second connector 2 further includes a limiting flange 22, where the limiting flange 22 is convexly disposed on a side wall of the second socket body 21, and the limiting flange 22 abuts against the second limiting protrusion 313 along the axis direction of the second mounting hole 312, so that the second socket body 21 is flush with the outer wall surface of the housing 3. In this embodiment, the second limiting protrusions 313 are provided with two and are respectively disposed on two opposite sides of the second mounting hole 312, and opposite surfaces of the two second limiting protrusions 313 are provided with chamfers, which can facilitate the second plug body 21 to be inserted between the two second limiting protrusions 313 and further inserted into the second mounting hole 312.

For the specific structure of the second limit projection 313. In this embodiment, the second limiting protrusion 313 is formed by a plurality of limiting plates disposed at intervals.

In addition, after the second plug body 21 is inserted into the second mounting hole 312, the peripheral wall of the second plug body 21 abuts against the hole wall of the second mounting hole 312, so that the hole wall of the second mounting hole 312 can limit the movement of the second plug body 21 in the direction perpendicular to the axis of the second mounting hole 312, the connecting lug 23 arranged on the second plug body 21 is fixedly connected with the housing, and the arrangement can limit the movement of the second plug body 21 along the axis of the second mounting hole 312. Furthermore, the above arrangement can achieve relative fixation of the second connector 2 and the housing 3.

For the effect that the second plug body 21 is flush with the outer wall surface of the housing 3, on one hand, when the binding post 100 collides, the housing 3 can play a role in protecting the second connector 2, and on the other hand, the aesthetic property of the binding post 100 is facilitated.

Optionally, the housing 3 includes a cover 31 and a fixing plate 32, where the cover 31 and the fixing plate 32 are detachably connected and enclose to form a receiving cavity 33, and the first mounting hole 311 and the second mounting hole 312 are both disposed in the cover 31, and the fixing plate 32 is used to connect with the circuit breaker body 200. In this embodiment, the above arrangement can facilitate the connection of the first connector 1 and the second connector 2 by the connection wire.

Optionally, one of the cover 31 and the fixing plate 32 is provided with a second clip 321, and the other is provided with a corresponding clamping groove 314, and the second clip 321 is located in the clamping groove 314. In this embodiment, the cover 31 has a clamping groove 314 at a peripheral interval, and the fixing plate 32 has a corresponding second clip 321 at a peripheral interval, where the second clip 321 is clamped in the corresponding clamping groove 314. In another embodiment, the second clips 321 are disposed at intervals on the peripheral side of the cover 31, the corresponding clamping slots 314 are disposed at intervals on the peripheral side of the fixing plate 32, and the second clips 321 are clamped in the corresponding clamping slots 314. In another embodiment, the opposite side walls of the cover 31 are provided with second clips 321, the opposite other side walls of the cover 31 are provided with clamping grooves 314, the opposite side walls of the fixing plate 32 are provided with corresponding clamping grooves 314, the opposite other side walls of the fixing plate 32 are provided with corresponding second clips 321, and the second clips 321 are clamped in the corresponding clamping grooves 314.

Optionally, the first connector 1 further includes a first conductive member 14, the second connector 2 further includes a second conductive member 24, and two ends of the connection wire are electrically connected to the first conductive member 14 and the second conductive member 24, respectively. In this embodiment, the first plug body 11 is provided with a first plug hole, the first conductive element 14 is inserted into the first plug hole and is fixedly connected with the first plug body 11, and the internal load is electrically connected with the first conductive element 14 of the first connector 1; the second plug body 21 is provided with a second plug hole, the second conductive element 24 is inserted in the second plug hole and fixedly connected with the second plug body 21, and an external power supply is electrically connected with the first conductive element 24 of the second connector 2.

Alternatively, the fixing plate 32 is screwed with the breaker body 200 by bolts, and in other embodiments, the fixing plate 32 is connected with the breaker body 200 by glue or snap.

The present embodiment also provides a circuit breaker, which includes a housing, a circuit breaker body 200, an internal load and the above-mentioned connection terminal 100, wherein the internal load, the connection terminal 100 and the circuit breaker body 200 are all disposed in the housing, the first connector 1 is electrically connected with the internal load, and the second connector 2 is connected with an external power source.

Optionally, the circuit breaker further comprises a housing, and the housing is provided with an external window; the cover 31 includes a first mounting surface 315 and a second mounting surface 316, the first mounting hole 311 is located the first mounting surface 315, the second mounting hole 312 is located the second mounting surface 316, the first mounting surface 315 is located in the housing and is spaced from the housing, and the second mounting surface 316 is arranged through the external window and is flush with the outer wall surface of the housing. In this embodiment, the first mounting surface 315 is located within the housing and spaced apart from the housing. This arrangement can facilitate connection to the load inside the housing 3. The second mounting surface 316 is disposed through the external window and flush with the outer wall surface of the housing, which facilitates connection to an external power source.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Binding post, its characterized in that includes:

a first connector (1);

a second connector (2);

the circuit breaker comprises a shell (3) and a circuit breaker body (200), wherein the shell (3) is provided with a containing cavity (33) and a first mounting hole (311) and a second mounting hole (312) which are communicated with the containing cavity (33), the first connector (1) is arranged in the containing cavity (33) and one end of the first connector is inserted into the first mounting hole (311), and the second connector (2) is arranged in the containing cavity (33) and one end of the second connector is inserted into the second mounting hole (312);

and the connecting wire is arranged in the accommodating cavity (33), and two ends of the connecting wire are respectively and electrically connected with the other end of the first connector (1) and the other end of the second connector (2).

2. The connecting terminal according to claim 1, wherein the first connector (1) comprises a first plug body (11) and a first clamping piece arranged on the first plug body (11), one end of the first plug body (11) is inserted into the first mounting hole (311), and the first clamping piece is clamped with the housing (3).

3. The connecting terminal according to claim 2, wherein the first clamping piece comprises a first clamp (12) and a first limiting protrusion (13), the first clamp (12) is respectively arranged on two opposite sides of the first plug body (11), the first limiting protrusion (13) is arranged on at least one of two opposite sides of the first plug body (11), the first clamp (12) can penetrate through the first mounting hole (311) and is clamped on the outer side wall of the shell (3), and the first limiting protrusion (13) is propped against the inner side wall of the shell (3).

4. A terminal according to claim 3, wherein the first clip (12) comprises an elastic plate (122) having one end elastically connected to the side wall of the first plug body (11), and the other end of the elastic plate (122) is provided with a clip (121) capable of being clipped on the outer side wall of the housing (3).

5. The connecting terminal according to claim 1, wherein the second connector (2) comprises a second plug body (21) and connecting lugs (23), the connecting lugs (23) are arranged on two opposite sides of one end of the second plug body (21), one end of the second plug body (21) is inserted into the second mounting hole (312), and the connecting lugs (23) are detachably connected with the housing (3).

6. The connecting terminal according to claim 5, wherein a second limiting protrusion (313) is provided on the inner wall of the housing (3) at a position close to the second mounting hole (312);

the second connector (2) further comprises a limiting flange (22), the limiting flange (22) is convexly arranged on the side wall of the second plug body (21), the limiting flange (22) is abutted to the second limiting protrusion (313) along the axis direction of the second mounting hole (312), and the second plug body (21) is flush with the outer wall surface of the shell (3).

7. The connection terminal according to claim 1, characterized in that the housing (3) comprises a cover body (31) and a fixing plate (32), the fixing plate (32) is used for being connected with the circuit breaker body (200), the first mounting hole (311) and the second mounting hole (312) are arranged on the cover body (31), and the cover body (31) is detachably connected with the fixing plate (32) and is enclosed into the accommodating cavity (33).

8. The connecting terminal according to claim 7, wherein one of the cover body (31) and the fixing plate (32) is provided with a second clip (321), the other is provided with a corresponding clamping groove (314), and the second clip (321) is clamped in the clamping groove (314).

9. The connection terminal according to any of claims 1-8, wherein the first connector (1) further comprises a first conductive member (14), the second connector (2) further comprises a second conductive member (24), and both ends of the connection wire are electrically connected to the first conductive member (14) and the second conductive member (24), respectively.

10. Circuit breaker, characterized by comprising a circuit breaker body (200), a housing, an internal load and a connection terminal (100) according to any of claims 1-9, the first connector (1) being electrically connected to the internal load, the second connector (2) being for connecting an external power source, the housing being provided with an external window;

the shell (3) comprises a first mounting surface (315) and a second mounting surface (316), the first mounting hole (311) is formed in the first mounting surface (315), the second mounting hole (312) is formed in the second mounting surface (316), the first mounting surface (315) is formed in the shell and is arranged at intervals with the shell, and the second mounting surface (316) is arranged in the external window in a penetrating mode and is flush with the outer wall surface of the shell.