Protective cover for circuit breaker and circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a protective cover for a circuit breaker and the circuit breaker, and the protective cover comprises a cover body. The cover body is used for sleeving a wiring terminal of the circuit breaker; two clamping parts are arranged on the inner wall of the cover body, and the two clamping parts are oppositely arranged; one side of the cover body is provided with an opening and closing gap, the opening and closing gap is arranged along the length direction of the cover body, and the wiring terminal enters the cover body through the opening and closing gap. The cover body is sleeved outside the wiring terminal, so that the wiring terminal can be protected, rain, snow, dust and the like are effectively prevented from entering the wiring terminal, and the normal work of the wiring terminal is ensured; the inner wall of the cover body is provided with two clamping parts, the two clamping parts are oppositely arranged, and the clamping parts abut against the outer surface of the wiring terminal, so that the supporting effect of the cover body on the wiring terminal is improved, the wiring terminal can be firmly fixed in the cover body, movement of the cover body relative to the wiring terminal is reduced, and the protection effect of the cover body on the wiring terminal is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit breaker, in particular, relate to a protective cover for circuit breaker and circuit breaker. BACKGROUND

[0002] Circuit breaker (or high voltage switch) can not only cut off or close the no-load current and load current in high voltage circuit, but also cut off overload current and short circuit current through the action of relay protection device when system fault occurs, which has quite perfect arc extinguishing structure and sufficient breaking capacity.

[0003] Circuit breaker plays a control role in high voltage circuit and is one of important electrical components in high voltage circuit. Circuit breaker is used to turn on or turn off circuit in normal operation, rapidly turn off circuit under the action of relay protection device in fault condition, and reliably turn on short circuit current in special condition (such as automatic reclosing to fault line). High voltage circuit breaker is a special electrical appliance for turning on or turning off high voltage circuit in normal or fault condition.

[0004] Circuit breaker is generally arranged outdoors, and the wiring terminal of circuit breaker is usually exposed, which is easy to be attacked by rain and snow and has the risk of short circuit. In the related technology, a protective cover is usually arranged outside the circuit breaker to protect the wiring terminal of the circuit breaker. However, the protective cover is not firmly fixed, and the protective cover is detached or deviated under the action of external force, which affects the protection effect on the wiring terminal. SUMMARY

[0005] The utility model provides a protective cover for circuit breaker, can play the protection effect to the wiring terminal of circuit breaker, reduces the risk of short circuit.

[0006] Other characteristics and advantages of the utility model will become apparent from the following detailed description, or will be learned partly by practice of the utility model.

[0007] The utility model provides a protective cover for circuit breaker, can play the protection effect to the wiring terminal of circuit breaker, reduces the risk of short circuit.

[0008] Cover body for setting outside the wiring terminal of circuit breaker, the inner wall of cover body is equipped with two clamping parts, two clamping parts are oppositely arranged, one clamping part abuts one side of wiring terminal, and the other clamping part abuts the other side of wiring terminal, so that wiring terminal is fixed in cover body,

[0009] One side of cover body is equipped with opening and closing gap, opening and closing gap is arranged along the length direction of cover body, and wiring terminal enters the inside of cover body through opening and closing gap.

[0010] The cover body is arranged outside the terminal, can protect the terminal, effectively prevents rain, snow, dust and the like from entering the terminal, and ensures normal working of the terminal; the cover body electrically isolates the terminal, can prevent external objects (such as tools, sundries and the like) from accidentally contacting the terminal, and avoids causing short circuit or electrical failure; the inner wall of the cover body is provided with two clamping portions, the two clamping portions are oppositely arranged, abut against the outer surface of the terminal through the clamping portions, improves the supporting effect of the cover body on the terminal, so that the terminal can be fixed in the interior of the cover body firmly, reduces the movement of the cover body relative to the terminal, and further improves the protection effect of the cover body on the terminal.

[0011] In an embodiment of the utility model, the clamping portion is sheet-shaped, and the clamping portion is inclined towards the direction away from the opening and closing gap.

[0012] In an embodiment of the utility model, along the thickness direction of the cover body, the height difference between the clamping portion and the opening and closing gap is greater than or equal to one third of the thickness of the cover body.

[0013] In an embodiment of the utility model, the side of the cover body away from the opening and closing gap is provided with a protruding portion, the width of the protruding portion is less than the maximum width of the cover body, and the protruding portion is used for accommodating the screw of the terminal.

[0014] In an embodiment of the utility model, one end of the cover body is provided with a wire hole, and the other end is provided with an opening; at least two connecting portions are arranged on the cover body and arranged along the length direction of the cover body; the protective cover further comprises a cover body, and the cover body is connected with one of the connecting portions to cover part of the opening of the cover body.

[0015] In an embodiment of the utility model, one of the connecting portion and the cover body is provided with a matching protruding portion, and the other is provided with a matching hole, and the matching protruding portion is matched with the matching hole.

[0016] In an embodiment of the utility model, a slot is arranged between the two adjacent connecting portions, and the slot is arranged along the circumferential side of the cover body.

[0017] In an embodiment of the utility model, a through hole is arranged on the cover body, and the through hole is used for passing through a tool; the through hole is communicated with the opening and closing gap.

[0018] The second aspect embodiment of the utility model provides a circuit breaker, and the circuit breaker comprises a circuit breaker main body, a terminal and the protective cover for the circuit breaker in the first aspect embodiment; the cover body is arranged on the terminal, and the terminal is connected with the circuit breaker main body.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0021] Figure 1 This is an overall structural diagram of a protective cover for a circuit breaker according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram illustrating the cooperation relationship between the protective cover and the wiring terminals of a circuit breaker according to an embodiment of the present invention;

[0023] Figure 3 This is a diagram showing the overall structure of the circuit breaker's wiring terminals.

[0024] Figure 4 This is an overall structural diagram of a protective cover for a circuit breaker according to an embodiment of the present invention;

[0025] Figure 5 for Figure 4 Cross-sectional view of line AA in the middle;

[0026] Figure 6 This is an overall structural diagram of a protective cover for a circuit breaker according to an embodiment of the present invention.

[0027] Figure Labels

[0028] 100. Cover body; 110. Clamping part; 120. Opening and closing gap; 121. Through hole; 130. Protrusion; 140. Wire hole; 150. Opening; 160. Connecting part; 161. Mating hole; 162. Slot; 170. Cover body; 171. Mating protrusion;

[0029] 200. Terminal block; 210. Wire clamp; 220. Wire. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0031] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., may be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0032] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] To better understand the technical content of this utility model, the technical solution of this utility model will be further introduced and explained below with reference to specific embodiments, but it is not limited thereto.

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] The terminals of a circuit breaker are the key components that carry current and voltage. Circuit breakers are typically installed outdoors, exposing the terminals, which makes them susceptible to rain and snow damage and poses a risk of short circuits.

[0038] The implementation details of the technical solution of this utility model embodiment are described in detail below:

[0039] The first aspect of this utility model is embodied in the embodiment, such asFigures 1 to 2 As shown, a protective cover for a circuit breaker is provided, the protective cover comprises a cover body 100; the cover body 100 is used to cover the outside of a terminal 200 of the circuit breaker; the inner wall of the cover body 100 is provided with two clamping portions 110, the two clamping portions 110 are oppositely arranged; one of the clamping portions 110 abuts against one side of the terminal 200, and the other clamping portion 110 abuts against the other side of the terminal 200, so that the terminal 200 is fixed in the cover body 100; one side of the cover body 100 is provided with an opening and closing gap 120, the opening and closing gap 120 is arranged along the length direction of the cover body 100, and the terminal 200 enters the inside of the cover body 100 through the opening and closing gap 120.

[0040] The cover body 100 covers the outside of the terminal 200, which can protect the terminal 200, effectively prevent rain, snow, dust and the like from entering the terminal 200, and ensure the normal work of the terminal 200; the cover body 100 plays an electrical isolation role on the terminal 200, which can prevent external objects (such as tools, sundries and the like) from accidentally contacting the terminal 200, and avoid causing short circuit or electrical failure; the inner wall of the cover body 100 is provided with two clamping portions 110, the two clamping portions 110 are oppositely arranged, and the clamping portions 110 abut against the outer surface of the terminal 200, which improves the supporting effect of the cover body 100 on the terminal 200, so that the terminal 200 can be firmly fixed in the inside of the cover body 100, reduces the movement of the cover body 100 relative to the terminal 200, and further improves the protection effect of the cover body 100 on the terminal 200.

[0041] Generally, the cover body 100 is in a strip shape to adapt to the shape of the terminal 200; the opening and closing gap 120 is arranged along the length direction of the cover body 100, and the opening and closing gap 120 is opened by a tool or by hand, so that the width of the opening and closing gap 120 is increased, the terminal 200 enters the inside of the cover body 100, and the opening and closing gap 120 is closed by a tool or by hand, so that the cover body 100 returns to the original state, so as to protect the terminal 200 by the cover body 100.

[0042] As shown in the drawings, Figure 3 The terminal 200 can be provided with a wire clamp 210, which can ensure that the wire 220 is firmly fixed on the terminal 200 of the circuit breaker, so that the current can smoothly pass through, and at the same time prevent the wire 220 from loosening or poor contact, and ensure the safety of the circuit. The material of the wire clamp 210 is usually metal or copper alloy, which has good electrical conductivity and can withstand large current; generally, the wire clamp 210 can be a screw type wire clamp 210. The clamping portion 110 can abut against the terminal 200 or the wire clamp 210 of the terminal 200.

[0043] In some embodiments, as shown in the drawings, Figures 4 to 5As shown, the clamping part 110 is sheet-shaped. This sheet-shaped clamping part 110 can contact the surface of the cavity over a larger area, increasing the friction between it and the surface of the terminal 200. This helps stabilize the position of the terminal 200 and prevents it from shifting or slipping. The sheet-shaped clamping part 110 also provides flexibility, allowing it to be bent and adapted to the shape of the terminal 200, resulting in a better fit and enhanced fixing effect. Furthermore, the sheet shape allows the clamping part 110 to effectively fix the component without occupying excessive space. The clamping part 110 is tilted away from the opening / closing gap 120 to confine the terminal 200 within the cover 100, reducing the risk of the terminal 200 slipping out of the opening / closing gap 120.

[0044] In some embodiments, such as Figures 4 to 5 As shown, along the thickness direction of the cover 100, the height difference between the clamping part 110 and the opening and closing gap 120 is greater than or equal to one-third of the thickness of the cover 100, so that the terminal 200 is as far away from the opening and closing gap 120 as possible under the action of the clamping part 110, reducing the risk of the terminal 200 slipping out of the cover 100; at the same time, a space is reserved below the clamping part 110 to accommodate the screw on the wire clamp 210 of the terminal 200.

[0045] In some embodiments, such as Figures 4 to 5 As shown, a protrusion 130 is provided on the side of the cover 100 facing away from the opening and closing gap 120. The width of the protrusion 130 is less than the maximum width of the cover 100. The protrusion 130 is used to accommodate the screw of the wiring terminal 200 to further fix the wiring terminal 200.

[0046] In some embodiments, such as Figure 6 As shown, one end of the cover 100 is provided with a wire hole 140 and the other end is provided with an opening 150, so that the wire 220 of the terminal 200 can pass through the cover 100 through the wire hole 140 and the opening 150; the cover 100 is provided with at least two connecting parts 160, which are arranged along the length direction of the cover 100; the protective cover also includes a cover 170, which is used to cover part of the opening 150 of the cover 100, reducing the exposed area of ​​the terminal 200, thereby strengthening the protection of the terminal 200; the at least two connecting parts 160 are arranged along the length direction of the cover 100, and the cover 170 is connected to one of the connecting parts 160, which can increase or decrease the internal space of the cover 100, so that the cover 100 can be adapted to terminal 200 of different lengths.

[0047] In some embodiments, such as Figure 6As shown, one of the connecting part 160 and the cover 170 is provided with the matching protrusion 171, and the other is provided with the matching hole 161, the matching protrusion 171 matches with the matching hole 161, so that the connection of the connecting part 160 and the cover 170 is realized; in the embodiment, the matching hole 161 is arranged on the connecting part 160, and the matching protrusion 171 is arranged on the cover 170; the matching protrusion 171 can be cylindrical, and the matching hole 161 can be circular.

[0048] In some embodiments, as shown in Figure 6 As shown, the slot 162 is arranged between the two adjacent connecting parts 160, the slot 162 is arranged along the circumferential side of the cover 100, and the slot 162 makes the connection part of the two adjacent connecting parts 160 form a thin wall; in use, the number of the connecting part 160 can be determined according to the length of the terminal 200, and the two adjacent connecting parts 160 can be broken at the position of the slot 162, so that the length of the cover 100 is adapted to the length of the terminal 200. For example, the connecting part 160 is provided with three, the length of the cover 100 is greater than the length of the terminal 200, and the length difference between the cover 100 and the terminal 200 is the length of one connecting part 160; then one connecting part 160 can be broken, and two connecting parts 160 are reserved, so that the length of the cover 100 is close to the length of the terminal 200, the empty space inside the cover 100 is reduced, and the relative movement between the cover 100 and the terminal 200 is reduced.

[0049] In some embodiments, as shown in Figure 1 As shown, the through hole 121 is arranged on the cover 100, the through hole 121 is used for passing through a tool, the through hole 121 is communicated with the opening and closing gap 120, and the tool passes through the through hole 121 to enter the cover 100, so that the opening and closing gap 120 is opened.

[0050] The second aspect of the utility model provides a kind of circuit breaker, and the circuit breaker includes circuit breaker main body, terminal 200 and the protective cover for circuit breaker of the above first aspect embodiment;Cover 100 is set in terminal 200, and terminal 200 is connected with circuit breaker main body.

[0051] It can be understood that the protective cover for circuit breaker has the beneficial effects of the above embodiments, so the circuit breaker also has the beneficial effects of the above embodiments, and the specific embodiments can be referred to the above embodiments, which will not be repeated here.

[0052] It should be understood that the utility model is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

[0053] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between entities or between an entity and an operation performed upon the entity, and do not necessarily imply a direct or indirect, physical or logical, relationship between or among more than one entity, and the absence of such a relationship does not imply that an entity is independent of another entity or operation. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a" does not, without more constraints, foreclose the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0054] The foregoing is merely illustrative of the principles of the application and various modifications can be made by persons skilled in the art without departing from the scope and nature of the application as disclosed in the specification and its appended claims. Thus, the scope of the application should be determined by the appended claims and their legal equivalents rather than by the description of the Examples that is given above.

Claims

1. A shield for a circuit breaker, characterized in that, The utility model relates to a protective cover for circuit breaker, comprising: a cover body for sleeving outside a terminal of the circuit breaker; an inner wall of the cover body is provided with two clamping parts, and the two clamping parts are oppositely arranged; one of the clamping parts abuts against one side of the terminal, and the other clamping part abuts against the other side of the terminal, so that the terminal is fixed in the cover body; one side of the cover body is provided with an opening and closing gap, the opening and closing gap is arranged along the length direction of the cover body, and the terminal enters the inside of the cover body through the opening and closing gap.

2. The cover for a circuit breaker of claim 1, wherein, The clamping part is in the shape of a sheet, and the clamping part is inclined towards the direction away from the opening and closing gap.

3. The cover for a circuit breaker of claim 1, wherein, Along the thickness direction of the cover body, the height difference between the clamping part and the opening and closing gap is greater than or equal to one third of the thickness of the cover body.

4. A shield for a circuit breaker according to any one of claims 1 to 3, characterized in that One side of the cover body away from the opening and closing gap is provided with a protruding part, the width of the protruding part is less than the maximum width of the cover body, and the protruding part is used for accommodating the screw of the terminal.

5. A shield for a circuit breaker according to any one of claims 1 to 3, characterized in that One end of the cover body is provided with a wire hole, and the other end is provided with an opening; at least two connecting parts are arranged on the cover body and arranged along the length direction of the cover body; the protective cover further comprises a cover body, and the cover body is connected with one of the connecting parts to cover part of the opening of the cover body.

6. The cover for a circuit breaker of claim 5, wherein, One of the connecting part and the cover body is provided with a matching protruding part, and the other is provided with a matching hole, and the matching protruding part matches with the matching hole.

7. The cover for a circuit breaker of claim 5, wherein, A slot is arranged between two adjacent connecting parts, and the slot is arranged along the circumferential side of the cover body.

8. A shield for a circuit breaker according to any one of claims 1 to 3, characterized in that A through hole is arranged on the cover body, and the through hole is used for passing through a tool; the through hole is communicated with the opening and closing gap.

9. A circuit breaker characterized by, The utility model relates to a protective cover for circuit breaker, comprising: a cover body for sleeving outside a terminal of the circuit breaker; an inner wall of the cover body is provided with two clamping parts, and the two clamping parts are oppositely arranged; one of the clamping parts abuts against one side of the terminal, and the other clamping part abuts against the other side of the terminal, so that the terminal is fixed in the cover body; one side of the cover body is provided with an opening and closing gap, the opening and closing gap is arranged along the length direction of the cover body, and the terminal enters the inside of the cover body through the opening and closing gap. The clamping part is in the shape of a sheet, and the clamping part is inclined towards the direction away from the opening and closing gap. Along the thickness direction of the cover body, the height difference between the clamping part and the opening and closing gap is greater than or equal to one third of the thickness of the cover body. One side of the cover body away from the opening and closing gap is provided with a protruding part, the width of the protruding part is less than the maximum width of the cover body, and the protruding part is used for accommodating the screw of the terminal. One end of the cover body is provided with a wire hole, and the other end is provided with an opening; at least two connecting parts are arranged on the cover body and arranged along the length direction of the cover body; the protective cover further comprises a cover body, and the cover body is connected with one of the connecting parts to cover part of the opening of the cover body. One of the connecting part and the cover body is provided with a matching protruding part, and the other is provided with a matching hole, and the matching protruding part matches with the matching hole. A slot is arranged between two adjacent connecting parts, and the slot is arranged along the circumferential side of the cover body. A through hole is arranged on the cover body, and the through hole is used for passing through a tool; the through hole is communicated with the opening and closing gap. The utility model relates to a protective cover for circuit breaker, comprising: a cover body for sleeving outside a terminal of the circuit breaker; an inner wall of the cover body is provided with two clamping parts, and the two clamping parts are oppositely arranged; one of the clamping parts abuts against one side of the terminal, and the other clamping part abuts against the other side of the terminal, so that the terminal is fixed in the cover body; one side of the cover body is provided with an opening and closing gap, the opening and closing gap is arranged along the length direction of the cover body, and the terminal enters the inside of the cover body through the opening and closing gap. The clamping part is in the shape of a sheet, and the clamping part is inclined towards the direction away from the opening and closing gap. Along the thickness direction of the cover body, the height difference between the clamping part and the opening and closing gap is greater than or equal to one third of the thickness of the cover body. One side of the cover body away from the opening and closing gap is provided with a protruding part, the width of the protruding part is less than the maximum width of the cover body, and the protruding part is used for accommodating the screw of the terminal. One end of the cover body is provided with a wire hole, and the other end is provided with an opening; at least two connecting parts are arranged on the cover body and arranged along the length direction of the cover body; the protective cover further comprises a cover body, and the cover body is connected with one of the connecting parts to cover part of the opening of the cover body. One of the connecting part and the cover body is provided with a matching protruding part, and the other is provided with a matching hole, and the matching protruding part matches with the matching hole. A slot is arranged between two adjacent connecting parts, and the slot is arranged along the circumferential side of the cover body. A through hole is arranged on the cover body, and the through hole is used for passing through a tool; the through hole is communicated with the opening and closing gap. The utility model relates to a protective cover for circuit breaker, comprising: a cover body for sleeving outside a terminal of the circuit breaker; an inner wall of the cover body is provided with two clamping parts, and the two clamping parts are oppositely arranged; one of the clamping parts abuts against one side of the terminal, and the other clamping part abuts against the other side of the terminal, so that the terminal is fixed in the cover body; one side of the cover body is provided with an opening and closing gap, the opening and closing gap is arranged along the length direction of the cover body, and the terminal enters the inside of the cover body through the opening and closing gap. The clamping part is in the shape of a sheet, and the clamping part is inclined towards the direction away from the opening and closing gap. Along the thickness direction of the cover body, the height difference between the clamping part and the opening and closing gap is greater than or equal to one third of the thickness of the cover body. One side of the cover body away from the opening and closing gap is provided with a protruding part, the width of the protruding part is less than the maximum width of the cover body, and the protruding part is used for accommodating the screw of the terminal. One end of the cover body is provided with a wire hole, and the other end is provided with an opening; at least two connecting parts are arranged on the cover body and arranged along the length direction of the cover body; the protective cover further comprises a cover body, and the cover body is connected with one of the connecting parts to cover part of the opening of the cover body. One of the connecting part and the cover body is provided with a matching protruding part, and the other is provided with a matching hole, and the matching protruding part matches with the matching hole. A slot is arranged between two adjacent connecting parts, and the slot is arranged along the circumferential side of the cover body. A through hole is arranged on the cover body, and the through hole is used for passing through a tool; the through hole is communicated with the opening and closing gap. The utility model relates to a protective cover for circuit breaker, comprising: a cover body for sleeving outside a terminal of the circuit breaker; an inner wall of the cover body is provided with two clamping parts, and the two clamping parts are oppositely arranged; one of the clamping parts abuts against one side of the terminal, and the other clamping part abuts against the other side of the terminal, so that the terminal is fixed in the cover body; one side of the cover body is provided with an opening and closing gap, the opening and closing gap is arranged along the length direction of the cover body, and the terminal enters the inside of the cover body through the opening and closing gap. The clamping part is in the shape of a sheet, and the clamping part is inclined towards the direction away from the opening and closing gap. Along the thickness direction of the cover body, the height difference between the clamping part and the opening and closing gap is greater than or equal to one third of the thickness of the cover body. One side of the cover body away from the opening and closing gap is provided with a protruding part, the width of the protruding part is less than the maximum width of the cover body, and the protruding part is used for accommodating the screw of the terminal.

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