CN216528488U - Inspection window structure and isolating switch - Google Patents

Abstract

A visual window structure and an isolating switch relate to the technical field of electrical switches. The observation window structure comprises a first base and a second base, wherein the first base and the second base are respectively of a semi-closed structure with an opening on one side, the opening of the first base and the opening of the second base are oppositely arranged, the observation window is arranged on the first base, and the first base is detachably connected with the second base so that the first base is matched with the second base to fix the observation window. The isolating switch comprises the viewing window structure. The observation window structure and the isolating switch have the advantages of less parts and simpler structure, and can be conveniently installed and detached.

Description

Inspection window structure and isolating switch

Technical Field

The utility model relates to the technical field of electrical switches, in particular to a viewing window structure and an isolating switch.

Background

Along with the rapid development of economy, the living standard of people is remarkably improved, and the electricity safety is more comprehensively known. In order to increase the safety of electricity utilization, a circuit breaker and a disconnector are usually connected to a circuit, and switching of the state of a load is completed by a switching operation. The isolating switch is mainly used for enabling the load to further form an explicit breakpoint after the circuit breaker breaks the circuit.

In order to observe the working state of the isolating switch, the surface of a common isolating switch product is provided with an observation window. The observation window among the prior art often needs face lid, transparent window and two at least bottom plates, and wherein, the transparent window sets up on the apron, and two fixed plates set up respectively in the relative both sides of apron, through mounting screw etc. so that fixed transparent window can cooperate jointly with the apron to the fixed plate, has the problem that spare part quantity is more, the structure is comparatively complicated, leads to the installation and dismantles comparatively loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a viewing window structure and an isolating switch, which have the advantages of fewer parts and simpler structure and can be conveniently mounted and dismounted.

The embodiment of the utility model is realized by the following steps:

in one aspect of the embodiment of the utility model, a viewing window structure is provided, which includes a first base and a second base, where the first base and the second base are respectively a semi-closed structure with an opening on one side, the opening of the first base and the opening of the second base are oppositely arranged, a viewing window is arranged on the first base, and the first base is detachably connected with the second base, so that the first base and the second base are matched to fix the viewing window. The observation window structure has the advantages of less parts and simpler structure, and can be conveniently installed and detached.

Optionally, first base include first bottom plate and respectively with the first ring wall that different sides of first bottom plate are connected, the second base include the second bottom plate and respectively with the second ring wall that different sides of second bottom plate are connected, the inspection window set up in on the first ring wall, first ring wall with second ring wall joint, so that first base with the second base joint.

Optionally, first annular leg includes first U-shaped bounding wall and respectively with the first curb plate that the relative both sides of first U-shaped bounding wall are connected, second annular leg include second U-shaped bounding wall and respectively with the second curb plate that the relative both sides of second U-shaped bounding wall are connected, first U-shaped bounding wall with second U-shaped bounding wall joint, first curb plate is close to one side of first U-shaped bounding wall with the second curb plate is kept away from one side of second U-shaped bounding wall is laminated each other.

Optionally, a first clamping groove is formed in the first side plate, a second clamping groove is formed between the first side plate and the second side plate, and two opposite sides of the viewing window are respectively clamped in the first clamping groove and the second clamping groove.

Optionally, the first side plate includes a first plate body and an L-shaped baffle fixedly connected to the first plate body, the first plate body and the L-shaped baffle form the first slot together, the second side plate includes a second plate body and a limit baffle fixedly connected to the second plate body, and the first plate body, the second plate body and the limit baffle form the second slot together.

Optionally, the viewing window includes a window body and an annular connecting portion arranged along an edge of the window body, opposite sides of the annular connecting portion are respectively clamped in the first clamping groove and the second clamping groove, and a side surface of the window body, which is far away from the first U-shaped coaming, is coplanar with a side surface of the first side plate, which is far away from the first U-shaped coaming.

Optionally, a guide portion is further disposed on the first side plate, and the guide portion is used for guiding the viewing window card disposed in the first card slot along a connection direction of the first card slot and the second card slot.

Optionally, the number of the guide portions is two, the connecting direction of the two guide portions is perpendicular to the connecting direction of the first clamping groove and the second clamping groove, and the other two opposite sides of the annular connecting portion are respectively limited between the two guide portions.

Optionally, the first base and the second base are both made of plastic, the observation window is made of transparent material, and the observation window corresponds to the contact assembly of the isolating switch in position.

In another aspect of the embodiments of the present invention, there is provided an isolator including the above-mentioned viewing window structure. The observation window structure has the advantages of less parts and simpler structure, and can be conveniently installed and detached.

The embodiment of the utility model has the beneficial effects that:

this inspection window structure includes first base and second base, and first base and second base are one side respectively and have the semi-enclosed construction of open-ended, and the opening of first base and the opening of second base are relative setting, are provided with the inspection window on the first base, and first base can be dismantled with the second base and be connected to make first base and the fixed inspection window of second base cooperation. When first base and second base are close to each other and realize dismantling between them and be connected, can make first base and second base form the casing that is enclosed construction jointly to play the guard action to isolator inside spare part through the casing, simultaneously, can also make isolator's installation and dismantlement simple and convenient more. The observation window is movably arranged on the first base, and the first base and the second base are close to each other to realize detachable connection of the first base and the second base, so that the first base and the second base are matched to fix the observation window. Because first base and second base can also cooperate fixed inspection window when first base and second base are close to each other and realize that both can dismantle the connection, and need not to adopt the fixed mode that increases other spare parts such as fixed plate and installation screw alone among the prior art, consequently, this inspection window structure that this application provided has spare part quantity less, the advantage that the structure is simpler, can be convenient for install and dismantle to shorten the dismouting time, and then improve dismouting efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a viewing window structure according to an embodiment of the present invention;

FIG. 2 is a second schematic structural diagram of a viewing window structure according to an embodiment of the present invention;

FIG. 3 is a third schematic structural diagram of a viewing window structure according to an embodiment of the present invention;

FIG. 4 is a fourth schematic structural diagram of a viewing window structure according to an embodiment of the present invention;

FIG. 5 is a fifth exemplary view of a structure of a viewing window according to an embodiment of the present invention;

fig. 6 is a sixth schematic structural view of a viewing window structure according to an embodiment of the present invention.

Icon: 100-a viewing window structure; 10-a first base; 11-a first base plate; 12-a first circumferential wall; 121-a first U-shaped coaming; 122-a first side panel; 1221-a first plate body; 1222-an L-shaped baffle; 123-a first card slot; 1224-a guide; 20-a second base; 21-a second bottom plate; 22-a second annular wall; 221-a second U-shaped coaming; 222-a second side panel; 2221-a second plate body; 2222-limit baffle; 223-a second card slot; 30-a viewing window; 31-a window body; 32-annular connection.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, an embodiment of the present application provides a viewing window structure 100, which includes a first base 10 and a second base 20, where the first base 10 and the second base 20 are respectively a semi-closed structure having an opening on one side, the opening of the first base 10 and the opening of the second base 20 are oppositely disposed, a viewing window 30 is disposed on the first base 10, and the first base 10 and the second base 20 are detachably connected, so that the first base 10 and the second base 20 cooperate to fix the viewing window 30. The viewing window structure 100 has advantages of a smaller number of parts and a simpler structure, and can be easily mounted and dismounted.

It should be noted that, the viewing window structure 100 includes a first base 10 and a second base 20, where the first base 10 and the second base 20 are respectively a semi-closed structure with an opening on one side, where the semi-closed structure with an opening on one side may be a rectangular structure with an opening on one side, or a cylindrical structure with an opening on one side, and those skilled in the art should be able to reasonably select and design according to actual situations, and here, there is no specific limitation, and it is only necessary to make the first base 10 and the second base 20 respectively have an opening on the opposite side.

Because first base 10 and second base 20 are one side respectively and have open-ended semi-enclosed construction, and the opening of first base 10 and the opening of second base 20 are relative setting, consequently, when first base 10 and second base 20 are close to each other and realize detachable connection between them, can make first base 10 and second base 20 form the casing that is enclosed construction jointly, thereby play the guard action to the inside spare part of isolator through the casing, simultaneously, can also make isolator's installation and dismantlement more simple and convenient.

Thus, the components inside the isolating switch, such as the movable contact, the fixed contact, or the viewing window 30, can be pre-assembled on the first base 10 or the second base 20, and after the first base 10 and the second base 20 are assembled, the components are naturally protected inside by the housing. Here, taking the viewing window 30 as an example, the viewing window 30 is movably disposed on the first base 10, and the first base 10 and the second base 20 are close to each other to detachably connect the two, so that the first base 10 and the second base 20 cooperate to fix the viewing window 30.

In the present invention, regarding the detachable connection manner of the first base 10 and the second base 20, a person skilled in the art should be able to make reasonable selection and design according to actual situations, and only need to make the first base 10 and the second base 20 close to each other to realize the detachable connection therebetween, and at the same time, the first base 10 and the second base 20 can also cooperate to fix the viewing window 30, which is not limited specifically here. Illustratively, the first base 10 and the second base 20 are respectively provided with a connecting hole, and the fastener sequentially passes through the connecting holes on the first base 10 and the second base 20, so as to enable the first base 10 and the second base 20 to be screwed, or the first base 10 and the second base 20 are respectively provided with a clamping portion, and the clamping portion on the first base 10 and the clamping portion on the second base 20 are matched with each other, so as to enable the first base 10 and the second base 20 to be clamped.

Because first base 10 and second base 20 can also cooperate fixed inspection window 30 when being close to each other and realizing the connection of dismantling between them at first base 10 and second base 20, and need not to adopt the fixed mode that increases other spare parts such as fixed plate and mounting screw alone among the prior art, consequently, this inspection window structure 100 that this application provided has spare part quantity less, the advantage that the structure is simpler, can be convenient for install and dismantle, thereby shorten the dismouting time, and then improve dismouting efficiency.

As described above, the viewing window structure 100 includes the first base 10 and the second base 20, the first base 10 and the second base 20 are respectively a semi-closed structure having an opening on one side, the opening of the first base 10 and the opening of the second base 20 are oppositely disposed, the viewing window 30 is disposed on the first base 10, and the first base 10 and the second base 20 are detachably connected, so that the first base 10 and the second base 20 cooperate to fix the viewing window 30. When first base 10 and second base 20 are close to each other and realize the connection of dismantling between them, can make first base 10 and second base 20 form the casing that is enclosed construction jointly to play the guard action to the inside spare part of isolator through the casing, simultaneously, can also make isolator's installation and dismantlement simple and convenient more. The viewing window 30 is movably disposed on the first base 10, and the first base 10 and the second base 20 are close to each other to detachably connect the two, so that the first base 10 and the second base 20 cooperate to fix the viewing window 30. Because first base 10 and second base 20 can also cooperate fixed inspection window 30 when being close to each other and realizing the connection of dismantling between them at first base 10 and second base 20, and need not to adopt the fixed mode that increases other spare parts such as fixed plate and mounting screw alone among the prior art, consequently, this inspection window structure 100 that this application provided has spare part quantity less, the advantage that the structure is simpler, can be convenient for install and dismantle, thereby shorten the dismouting time, and then improve dismouting efficiency.

Illustratively, in the present embodiment, as shown in fig. 2, 3 and 6, the first base 10 includes a first base plate 11 and first circumferential walls 12 respectively connected to different sides of the first base plate 11, as shown in fig. 4 and 6, the second base 20 includes a second base plate 21 and second circumferential walls 22 respectively connected to different sides of the second base plate 21, the inspection window 30 is provided on the first circumferential wall 12, and the first circumferential wall 12 is engaged with the second circumferential wall 22, so that the first base 10 is engaged with the second base 20. Compared with other detachable connection modes, the first annular surrounding wall 12 is clamped with the second annular surrounding wall 22, so that the first base 10 is clamped with the second base 20, the number of parts required to be used in the dismounting of the disconnecting switch can be reduced to the greatest extent, the dismounting time is further shortened, and the dismounting efficiency is improved.

Taking the first base 10 as an example, the shape of the first base 11 may be polygonal, circular or the like, when the shape of the first base 11 is polygonal, the first circumferential wall 12 has the same number of walls, and one side of the different walls close to the first base 11 corresponds to and is fixedly connected with the different side of the first base 11, for example, when the shape of the first base 11 is quadrilateral, the first circumferential wall 12 has four walls connected end to end in sequence, and one side of the four walls close to the first base 11 corresponds to and is fixedly connected with the four sides of the first base 11, when the shape of the first base 11 is pentagonal, the first circumferential wall 12 has five walls connected end to end in sequence, and one side of the five walls close to the first base 11 corresponds to and is fixedly connected with the five sides of the first base 11. Since the first base 10 and the second base 20 need to be matched with each other, the specific structure of the second base 20 can be designed with reference to the first base 10, and will not be described herein.

Since the sectional shape of a general isolating switch product is rectangular, the first base plate 11 is rectangular, and thus, in this embodiment, as shown in fig. 2, 3 and 6, the first annular surrounding wall 12 includes a first U-shaped surrounding wall 121 and a first side plate 122 connected to two opposite sides of the first U-shaped surrounding wall 121, as shown in fig. 4 and 6, the second annular surrounding wall 22 includes a second U-shaped surrounding wall 221 and a second side plate 222 connected to two opposite sides of the second U-shaped surrounding wall 221, the first U-shaped surrounding wall 121 and the second U-shaped surrounding wall 221 are clamped, and a side of the first side plate 122 close to the first U-shaped surrounding wall 121 and a side of the second side plate 222 far from the second U-shaped surrounding wall 221 are attached to each other.

When carrying out the joint to first annular surrounding wall 12 and second annular surrounding wall 22, can laminate each other with one side that first curb plate 122 is close to first U-shaped bounding wall 121 and one side that second curb plate 222 kept away from second U-shaped bounding wall 221 earlier, carry out the joint with first U-shaped bounding wall 121 and second U-shaped bounding wall 221 again, at this moment, support each other between first curb plate 122 and the second curb plate 222 and hold, can laminate each other inseparabler, thereby have great clearance between the two when avoiding first base 10 and second base 20 joint, lead to inside dust impurity etc. get into isolator through this clearance easily.

In the present embodiment, as shown in fig. 3 and 6, the first side plate 122 is provided with a first locking groove 123, as shown in fig. 4 and 6, a second locking groove 223 is formed between the first side plate 122 and the second side plate 222, and two opposite sides of the viewing window 30 are respectively locked in the first locking groove 123 and the second locking groove 223. Before the first circumferential wall 12 and the second circumferential wall 22 are clamped, one side of the viewing window 30 may be clamped in the first clamping groove 123, and the other side of the viewing window 30 may be clamped in the second clamping groove 223 while the first circumferential wall 12 and the second circumferential wall 22 are clamped, so that the first base 10 and the second base 20 can cooperate to fix the viewing window 30.

In this embodiment, as shown in fig. 3 and 6, the first side plate 122 includes a first plate body 1221 and an L-shaped baffle 1222 fixedly connected to the first plate body 1221, the first plate body 1221 and the L-shaped baffle 1222 together form a first slot 123, as shown in fig. 4 and 6, the second side plate 222 includes a second plate body 2221 and a limit baffle 2222 fixedly connected to the second plate body 2221, and the first plate body 1221, the second plate body 2221 and the limit baffle 2222 together form a second slot 223. The first plate body 1221 and the L-shaped baffle 1222 may be integrally formed, and the second plate body 2221 and the limiting baffle 2222 may be integrally formed, so as to provide stability and reliability when the first engaging groove 123 and the second engaging groove 223 are engaged with and fixed to the viewing window 30.

Illustratively, as shown in fig. 5 and 6, the viewing window 30 includes a window body 31 and an annular connecting portion 32 disposed along an edge of the window body 31, opposite sides of the annular connecting portion 32 are respectively clamped in the first clamping groove 123 and the second clamping groove 223, a side of the window body 31 away from the first U-shaped surrounding plate 121 is coplanar with a side of the first side plate 122 away from the first U-shaped surrounding plate 121, that is, a side of the window body 31 away from the first U-shaped surrounding plate 121 is flush with a side of the first side plate 122 away from the first U-shaped surrounding plate 121, so as to make an appearance of the disconnector product more beautiful, and prevent a side of the window body 31 away from the first U-shaped surrounding plate 121 from being closer to the first U-shaped surrounding plate 121 than a side of the first side plate 122 away from the first U-shaped surrounding plate 121, that is, a side of the window body 31 away from the first U-shaped surrounding plate 121 from the first side of the first side plate 122 from the first U-shaped surrounding plate 121 from being recessed, so as to make an appearance of the disconnector product less beautiful, and dust and impurities are easily accumulated at the recess and are not easy to clean.

Further, in the present embodiment, as shown in fig. 3 and 6, the first side plate 122 is further provided with a guiding portion 1224, and the guiding portion 1224 is used for guiding the viewing window 30 to be clamped in the first clamping groove 123 along the connecting line direction of the first clamping groove 123 and the second clamping groove 223, so that when the viewing window 30 is pre-assembled on the first base 10, the viewing window 30 can be more conveniently and accurately aligned with the first clamping groove 123, and the accuracy of the assembly and disassembly can be further improved. Optionally, the number of the guide parts 1224 is two, a connecting line direction of the two guide parts 1224 is perpendicular to a connecting line direction of the first card slot 123 and the second card slot 223, and the other two opposite sides of the annular connecting part 32 are respectively limited between the two guide parts 1224. In this way, two side edges of the viewing window 30 can be respectively clamped in the first groove and the second groove, and the other two side edges of the viewing window 30 can be respectively limited between the two guiding parts 1224, so as to further improve the stability and reliability of the viewing window 30 when being assembled between the first base 10 and the second base 20.

Optionally, the first base 10 and the second base 20 are made of plastic, the viewing window 30 is made of transparent material, and the viewing window 30 corresponds to the position of the contact assembly of the disconnecting switch. The first base 10 and the second base 20 are made of plastic, so that when the first U-shaped enclosing plate 121 is clamped to the second U-shaped enclosing plate 221, the first side plate 122 and the second side plate 222 can be attached to each other through elastic deformation of the plastic, and when the first U-shaped enclosing plate 121 and the second U-shaped enclosing plate 221 are released from the clamping, the first side plate 122 and the second side plate 222 can restore the shape of the first side plate through elastic deformation of the plastic. In addition, the viewing window 30 is made of a transparent material, such as plastic, glass, and the like, and the viewing window 30 corresponds to a position of a contact component of the disconnecting switch, so that after the first base 10 and the second base 20 are fastened and fixed, a user can view the inside of a product of the disconnecting switch through the light transmittance of the viewing window 30, for example, the viewing window 30 may be located near a contact end where a moving contact of the contact component contacts a fixed contact, or near a rotating end where the moving contact rotates relative to the support, so that the user can view the relative movement between the moving contact and the fixed contact through the viewing window 30, thereby determining the specific positions of the moving contact and the fixed contact and the switching-off state of the disconnecting switch.

The application also provides an isolating switch. The present embodiment provides a disconnector including the above-described viewing window structure 100. Since the structure and advantageous effects of the viewing window structure 100 have been described in detail in the foregoing embodiments, no further description is provided herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a look at window structure (100), characterized in that, includes first base (10) and second base (20), first base (10) with second base (20) are one side respectively and have open-ended semi-enclosed construction, the opening of first base (10) with the opening of second base (20) are relative setting, be provided with on first base (10) and look at window (30), first base (10) with second base (20) can dismantle the connection, so that first base (10) with second base (20) cooperation is fixed look at window (30).

2. The viewing window structure (100) according to claim 1, wherein the first base (10) comprises a first base plate (11) and first annular walls (12) respectively connected to different sides of the first base plate (11), the second base (20) comprises a second base plate (21) and second annular walls (22) respectively connected to different sides of the second base plate (21), the viewing window (30) is disposed on the first annular walls (12), the first annular walls (12) are snap-fitted to the second annular walls (22), so that the first base (10) is snap-fitted to the second base (20).

3. The viewing window structure (100) according to claim 2, wherein the first annular perimeter wall (12) comprises a first U-shaped perimeter wall (121) and a first side panel (122) connected to opposite sides of the first U-shaped perimeter wall (121), the second annular perimeter wall (22) comprises a second U-shaped perimeter wall (221) and a second side panel (222) connected to opposite sides of the second U-shaped perimeter wall (221), the first U-shaped perimeter wall (121) is snap-fitted to the second U-shaped perimeter wall (221), and a side of the first side panel (122) adjacent to the first U-shaped perimeter wall (121) and a side of the second side panel (222) remote from the second U-shaped perimeter wall (221) are fitted to each other.

4. The viewing window arrangement (100) according to claim 3, wherein the first side plate (122) is provided with a first locking groove (123), a second locking groove (223) is formed between the first side plate (122) and the second side plate (222), and opposite sides of the viewing window (30) are locked in the first locking groove (123) and the second locking groove (223), respectively.

5. The viewing window structure (100) according to claim 4, wherein the first side plate (122) comprises a first plate body (1221) and an L-shaped baffle (1222) fixedly connected to the first plate body (1221), the first plate body (1221) and the L-shaped baffle (1222) together forming the first slot (123), the second side plate (222) comprises a second plate body (2221) and a limit baffle (2222) fixedly connected to the second plate body (2221), the first plate body (1221), the second plate body (2221) and the limit baffle (2222) together forming the second slot (223).

6. The viewing window arrangement (100) according to claim 4, wherein the viewing window (30) comprises a window body (31) and an annular connecting portion (32) arranged along an edge of the window body (31), opposite sides of the annular connecting portion (32) are respectively snapped into the first and second snap grooves (123, 223), and a side of the window body (31) facing away from the first U-shaped collar (121) is coplanar with a side of the first side plate (122) facing away from the first U-shaped collar (121).

7. The viewing window arrangement (100) according to claim 6, wherein the first side plate (122) further comprises a guide portion (1224), and the guide portion (1224) is configured to guide the viewing window (30) to be engaged in the first slot (123) along a line connecting the first slot (123) and the second slot (223).

8. The viewing window structure (100) according to claim 7, wherein the guiding portions (1224) include two guiding portions, a connecting line direction of the two guiding portions (1224) is perpendicular to a connecting line direction of the first locking groove (123) and the second locking groove (223), and the other two opposite sides of the annular connecting portion (32) are respectively limited between the two guiding portions (1224).

9. The viewing window arrangement (100) according to any one of claims 1 to 8, wherein the first base (10) and the second base (20) are both made of plastic, the viewing window (30) is made of a transparent material, and the viewing window (30) corresponds to a contact assembly of a disconnector.

10. A disconnector, characterized in that it comprises a viewing window arrangement (100) according to any one of claims 1 to 9.

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