Mask assembly and circuit breaker

Abstract

The utility model provides a mask assembly and a circuit breaker, and relates to the technical field of electrical equipment. An indicating window in the mask assembly is installed on a cover shell and is in hot riveting with the cover shell. The surface cover is connected with the housing, and the surface cover is provided with a first through hole used for exposing the indication window. In the direction from the surface cover to the cover shell, the indicating window part is located between the cover shell and the surface cover, and the surface cover part abuts against the indicating window. The mask is in an assembly form, and compared with an integrated mask structure, important structural parts in the mask assembly can be made of materials with high strength, so that the overall strength of the mask assembly is improved on the premise that the cost of the mask assembly is not increased. Besides, the indication window is installed on the cover shell and is in hot riveting with the cover shell, in the direction from the face cover to the cover shell, the indication window is partially located between the cover shell and the face cover, and the face cover partially abuts against the indication window, so that the installation firmness of the indication window on the cover shell is improved, the influence of large current impact on the indication window when the circuit breaker is broken is reduced, and the service life of the circuit breaker is prolonged. And the use performance of the circuit breaker is improved.

Description

Technical Field

[0001] This application relates to the technical field of electrical equipment, and particularly to a face mask assembly and a circuit breaker. Background Art

[0002] A circuit breaker is an important switching device in a power mechanism, capable of closing, carrying, and interrupting the current in a circuit.

[0003] A frame-type circuit breaker, as a type of circuit breaker, is a protection and control device used in a power system, often applied in industrial control, distribution systems, substations, power transformers, etc., and has high reliability and safety. Due to its strong structure, it can withstand large working currents and short-circuit currents, so it is widely used in high-power power systems. Generally, a circuit breaker includes a base and a face mask. The face mask covers the base to provide an installation space for other structural components in the circuit breaker.

[0004] However, in the prior art, the structural design of the face mask of the circuit breaker is unreasonable, so that when the circuit breaker is tripped, the face mask is easily damaged by the impact of large current. In particular, some structures with indication functions provided on the face mask are extremely vulnerable to the impact of large current, reducing the service performance of the circuit breaker. Summary of the Utility Model

[0005] In view of the above problems, this application provides a face mask assembly and a circuit breaker, which can improve the installation reliability of the face cover and the indication window, increase the strength of the face mask assembly, reduce the impact of large current during the tripping of the circuit breaker, and facilitate improving the service performance of the circuit breaker.

[0006] In a first aspect, this application provides a face mask assembly, which includes a mask shell, an indication window, and a face cover. The indication window is installed in the mask shell and thermally riveted to the mask shell. The face cover is connected to the mask shell. The face cover is provided with a first through hole opposite to the position of the indication window, and the first through hole is used to expose the indication window. In the direction from the face cover to the mask shell, part of the indication window is located between the mask shell and the face cover, and part of the face cover presses against the indication window.

[0007] The face mask in the circuit breaker of this application is in the form of an assembly structure, that is, it includes multiple structural components combined with each other. Compared with the integral face mask structure in the related art, this application facilitates making the more important structural components in the face mask assembly from materials with higher strength, so as to improve the overall strength of the face mask assembly without increasing the cost of the face mask assembly.

[0008] In addition, on the one hand, the indicating window in the mask assembly is installed on the mask housing and thermally riveted to the mask housing. The thermal riveting connection method is convenient for improving the installation reliability of the indicating window on the mask housing and can reduce the influence of the indicating window being impacted by large current during the opening of the circuit breaker. On the other hand, in the direction from the face cover to the mask housing, a part of the indicating window is located between the mask housing and the mask, so that the face cover can partially press against the indicating window, thereby clamping the indicating window between the face cover and the mask housing, further reducing the possibility of the indicating window being blown off the mask housing by high-pressure gas due to the opening of the large current by the circuit breaker. Therefore, it is convenient to improve the service performance of the circuit breaker.

[0009] In a possible design, the mask housing is provided with a blind groove, the indicating window is supported on the bottom of the blind groove, and the side wall of the indicating window abuts against the side wall of the blind groove. The face cover presses against the edge of the indicating window, and the edge is the part of the indicating window close to the side wall of the groove.

[0010] Through the above solution, the indicating window is supported on the bottom of the blind groove, and the installation of the indicating window on the mask housing can be realized. The side wall of the indicating window abuts against the side wall of the blind groove, so that static friction can be generated between the side wall of the indicating window and the side wall of the blind groove. In this way, when the circuit breaker opens a large current and the indicating window is impacted in the direction from the mask housing to the face cover, under the action of the above-mentioned static friction, the mask housing can limit the movement of the indicating window towards the face cover, thereby reducing the possibility of the indicating window being blown off the mask housing.

[0011] The face cover only presses against the edge of the indicating window, rather than pressing against all parts on the side of the indicating window facing away from the bottom of the groove. When the face cover clamps the indicating window between the face cover and the mask housing, it will not completely cover the indicating window so that there is no part that can be exposed to the first through hole. In this way, while ensuring the installation reliability of the indicating window on the mask housing, the indicating function of the indicating window can be not affected.

[0012] In a possible design, the indicating window includes a main body part and an extension part. The main body part is located in the blind groove, the side wall of the main body part abuts against the side wall of the blind groove, and the face cover presses against the edge of the main body part. The extension part is connected to the side of the main body part facing away from the bottom of the groove, and the side wall of the extension part abuts against the wall of the first through hole.

[0013] Through the above solution, the side wall of the main body portion abuts against the groove wall of the blind groove, so that static friction can be generated between the side wall of the main body portion and the groove wall of the blind groove. Similarly, the side wall of the extension portion abuts against the hole wall of the first through hole, so that static friction can be generated between the side wall of the extension portion and the hole wall of the first through hole. In this way, when the circuit breaker breaks a large current and the indicating window is impacted in the direction from the housing to the face cover, the movement of the indicating window towards the face cover can be restricted not only by the friction between the groove wall of the blind groove and the side wall of the main body portion, but also by the friction between the hole wall of the first through hole and the side wall of the extension portion. That is to say, not only the housing can restrict the movement of the indicating window towards the face cover, but the face cover can also restrict the movement of the indicating window towards the face cover. Thus, the possibility of the indicating window being washed off the housing can be reduced.

[0014] In a possible design, the side of the main body portion facing away from the groove bottom is flush with the notch of the blind groove.

[0015] With such a setting, when the face cover is connected to the housing and the face cover presses against the edge of the indicating window, the size of the circuit breaker in the direction from the face cover to the housing will not increase due to the side of the main body portion facing away from the groove bottom exceeding the notch of the blind groove, which is convenient for realizing the miniaturization of the circuit breaker.

[0016] In a possible design, the side of the extension portion facing away from the main body portion is flush with the side of the face cover facing away from the housing.

[0017] With such a setting, on the premise of ensuring that the side wall of the extension portion abuts against the hole wall of the first through hole, the extension portion will not protrude from the face cover. In this way, the aesthetic degree of the face mask assembly can be increased, and it can also be avoided that the extension portion protrudes from the face cover and interferes with other structural parts outside the face cover.

[0018] In a possible design, a plug strip is provided on the side of the main body portion facing away from the extension portion, and a jack is provided at a position on the groove bottom opposite to the plug strip. The plug strip is inserted into the jack and abuts against the jack.

[0019] Through the above solution, the plug strip is inserted into the jack and abuts against the jack, so that the plug strip and the jack have a contact surface, and static friction can be generated between the two. In this way, when the circuit breaker breaks a large current and the indicating window is impacted in the direction from the housing to the face cover, under the action of the aforementioned static friction, the jack can restrict the movement of the plug strip towards the face cover. Equivalently, the housing can restrict the movement of the indicating window towards the face cover, thereby reducing the possibility of the indicating window being washed off the housing.

[0020] In a possible design, a boss is provided on the side of the main body portion facing away from the extension portion, and a through hole is provided at a position on the groove bottom opposite to the boss. At least a part of the boss is located in the through hole and abuts against the through hole.

[0021] With the above solution, the boss is at least partially located within the perforation and abuts against the perforation, such that the boss and the perforation have a contact surface, and static friction can be generated therebetween. Thus, when the circuit breaker interrupts a large current and the indicating window is impacted in the direction from the housing to the face cover, under the action of the aforementioned static friction, the perforation can restrict the movement of the boss towards the face cover. Equivalently, the housing can restrict the movement of the indicating window towards the face cover, thereby reducing the possibility of the indicating window being knocked off the housing.

[0022] In a possible design, the face mask assembly further includes a counter. The housing is provided with a mounting hole, the counter is at least partially mounted in the mounting hole and connected to the housing, the face cover is provided with a second through hole, and the position of the second through hole corresponds to the position of the counter, and the second through hole is used to expose the counter.

[0023] With the above solution, the face mask assembly includes a counter, and the number of opening and closing operations of the circuit breaker can be measured by the counter, enriching the functions of the circuit breaker. The counter is at least partially mounted in the mounting hole and connected to the housing, which can realize the mounting and fixing of the counter on the housing. The position of the second through hole corresponds to the position of the counter, such that the counter can be exposed through the second through hole when mounted on the housing. In this way, the operator can observe the number displayed on the counter through the second through hole.

[0024] In a possible design, the counter includes a display portion and a mounting portion. The display portion is at least partially located within the mounting hole, and the mounting portion is connected to the display portion and connected to the side of the housing facing away from the face cover.

[0025] In a possible design, the mounting portion is provided with a connection hole, and the side of the housing facing away from the face cover is provided with a connection post, or, the side of the mounting portion facing the display portion is provided with a connection post, and the housing is provided with a connection hole. The connection post is embedded in the connection hole and connected to the connection hole.

[0026] With the above solution, the counter can be mounted in the direction from the housing to the face cover. When the connection post is embedded in the connection hole and connected to the connection hole, the mounting portion can be connected to the side of the housing facing away from the face cover, realizing the mounting of the counter on the housing.

[0027] In a second aspect, the present application provides a circuit breaker, which includes a base and the face mask assembly in the first aspect, and the base is covered with the housing of the face mask assembly.

[0028] For the circuit breaker provided in the above second aspect and each possible design of the above second aspect, the beneficial effects can refer to the beneficial effects brought by the above first aspect and each possible implementation manner of the first aspect, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1Schematic diagram of the combined structure of a mask assembly provided by an embodiment of the present application from a perspective.

[0030] Figure 2 Exploded view of a mask assembly provided by an embodiment of the present application.

[0031] Figure 3 Schematic diagram of the structure of a housing provided by an embodiment of the present application from a perspective.

[0032] Figure 4 Schematic diagram of the structure of a face cover provided by an embodiment of the present application.

[0033] Figure 5 Schematic diagram of the combined structure of a mask assembly provided by an embodiment of the present application from another perspective.

[0034] Figure 6 For Figure 5 Cross-sectional view along the A-A section.

[0035] Figure 7 For Figure 6 Enlarged view of part B in

[0036] Figure 8 Schematic diagram of the structure of an indicator window provided by an embodiment of the present application from a perspective.

[0037] Figure 9 Schematic diagram of the structure of an indicator window provided by an embodiment of the present application from another perspective.

[0038] Figure 10 For Figure 5 Cross-sectional view along the C-C section.

[0039] Figure 11 For Figure 10 Enlarged view of part D in

[0040] Figure 12 For Figure 3 Enlarged view of part E in

[0041] Figure 13 Schematic diagram of the structure of a housing provided by an embodiment of the present application from another perspective.

[0042] Figure 14 For Figure 13 Enlarged view of part F in

[0043] Figure 15 Schematic diagram of the structure of a counter provided by an embodiment of the present application from a perspective.

[0044] Figure 16 Schematic diagram of the structure of a counter provided by an embodiment of the present application from another perspective.

[0045] Description of Reference Numerals

[0046] 100, face mask assembly;

[0047] 200, housing; 210, buckle; 220, blind slot; 221, jack; 222, perforation; 230, mounting hole; 240, connecting post; 250, cover plate mounting hole;

[0048] 300, indicator window; 310, body part; 320, extension part; 330, insert bar; 340, boss;

[0049] 400, face cover; 410, first through hole; 420, card slot; 430, second through hole; 440, mounting groove; 450, mounting opening;

[0050] 500, counter; 510, display part; 520, mounting part; 521, connecting hole;

[0051] 600, nameplate. Detailed Implementation Manner

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion.

[0054] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0055] In this text, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: the existence of A, the simultaneous existence of A and B, and the existence of B. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0056] All directional terms appearing in the following descriptions are the directions shown in the figures, and do not limit the specific structure of the current-limiting module of this application. For example, in the description of this application, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0057] In addition, terms such as "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0058] In the description of this application, unless otherwise specified, the meaning of "multiple" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups).

[0059] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "joined" should be understood in a broad sense. For example, the "connection" or "joining" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In the related art, the face mask of a circuit breaker is usually a one-piece component. The one-piece face mask covers and is connected to the base. After the face mask of this structure is connected to the base, its strength is relatively low. When the circuit breaker interrupts a large current, it is relatively easy to be damaged by the impact of the large current. Especially, the structure with an indicating function provided on the face mask is extremely vulnerable to the impact of the large current, resulting in a relatively low service performance of the circuit breaker.

[0061] In view of this, the present application provides a mask assembly and a circuit breaker to improve the installation reliability of the face cover and the indicating window, increase the strength of the mask assembly, reduce the influence of the large current impact on the circuit breaker during breaking, and thus improve the service performance of the circuit breaker.

[0062] Among them, the circuit breaker can be a frame circuit breaker, and of course, it can also be other circuit breakers that need to be provided with a face cover assembly. Hereinafter, only the mask assembly shown in the attached drawings will be taken as an example for introduction, but it does not limit the technical solution of the present application.

[0063] Figure 1 FIG. is a schematic combined structure diagram of a mask assembly provided by an embodiment of the present application from a perspective, as Figure 1 shown, the circuit breaker includes a base (not shown in the figure) and a mask assembly 100. Among them, the base is covered with the housing 200 of the mask assembly 100.

[0064] After the base is covered with the housing 200, an installation space is formed between the base and the housing 200. Structures such as the contact system and the arc extinguishing system are all installed in this installation space.

[0065] The mask in the circuit breaker of the present application is in the form of an assembly structure, that is, it includes a plurality of mutually combined structural members. Compared with the integral mask structure in the related art, in the present application, it is convenient to make the relatively important structural members in the mask assembly 100 from materials with higher strength, so as to improve the overall strength of the mask assembly 100 without increasing the cost of the mask assembly 100. In addition, the indicating window 300 in the mask assembly 100 is installed on the housing 200 and thermally riveted to the housing 200. The thermal riveting connection method is convenient to improve the installation reliability of the indicating window 300 on the housing 200, reduce the influence of the large current impact on the indicating window 300 during breaking of the circuit breaker, and is convenient to improve the service performance of the circuit breaker.

[0066] Next, the specific structure of the mask assembly 100 of the present application will be introduced in detail with reference to the attached drawings.

[0067] Figure 2 FIG. is an exploded view of a mask assembly provided by an embodiment of the present application. Combining Figure 1 and Figure 2 , the present application provides a mask assembly 100, which includes a housing 200, an indicating window 300 and a face cover 400. The indicating window 300 is installed on the housing 200 and thermally riveted to the housing 200. The face cover 400 is connected to the housing 200. The face cover 400 is provided with a first through hole 410 opposite to the position of the indicating window 300. The first through hole 410 is used to expose the indicating window 300. In the direction from the face cover 400 to the housing 200, a part of the indicating window 300 is located between the housing 200 and the face cover 400, and a part of the face cover 400 presses against the indicating window 300.

[0068] The housing 200 is the structural member in the face mask assembly 100 that is relatively closest to the base. Therefore, the housing 200 can be connected to the base to achieve the installation of the face mask assembly 100 on the base. Among them, the housing 200 can be connected to the base by means of screw connection or plug-in connection, etc.

[0069] The indicating window 300 can be made of a transparent material to facilitate the operator to observe the internal situation of the circuit breaker outside the circuit breaker. The shape of the indicating window 300 can be square, rectangular, rhombic, or can also be Figure 2 circular as shown, and the embodiments of the present application do not limit this.

[0070] Figure 2 As shown, the number of indicating windows 300 is two. One indicating window 300 is used for the opening and closing indication of the circuit breaker, and the other indicating window 300 is used for the energy storage indication. It can be understood that the number of indicating windows 300 can be set to one, two, three or more according to needs, and the number of indicating windows 300 does not constitute a limitation to the technical solution of the present application.

[0071] The indicating window 300 is supported on the housing 200 and fixedly connected to the housing 200 by hot riveting. This connection method makes the installation reliability of the indicating window 300 on the housing 200 relatively high, reducing the possibility that the indicating window 300 is washed off from the housing 200 when the circuit breaker breaks a large current, thereby facilitating the improvement of the use performance of the circuit breaker.

[0072] The face cover 400 is the structural member in the face mask assembly 100 that is relatively farthest from the base. The face cover 400 can provide an installation position for some structural members in the face mask assembly 100, and can block or fix some structural members of the face mask assembly 100.

[0073] Figure 3 is a schematic structural diagram of a housing provided by an embodiment of the present application from a perspective, Figure 4 is a schematic structural diagram of a face cover provided by an embodiment of the present application, Figure 3 and Figure 4 In, the housing 200 is provided with a plurality of buckles 210, and the face cover 400 is provided with a plurality of slots 420, and the plurality of buckles 210 correspond to the plurality of slots 420 one by one. Combining Figures 1 to 4 , when the plurality of buckles 210 are respectively snapped into the corresponding slots 420, the connection between the face cover 400 and the housing 200 can be achieved.

[0074] Among them, the plurality of buckles 210 can be arranged at intervals on the housing 200, and can be arranged at positions where warping deformation is likely to occur after the housing 200 is connected to the face cover 400. Similarly, the plurality of slots 420 can be arranged at intervals on the face cover 400, and can be arranged at positions where warping deformation is likely to occur after the face cover 400 is connected to the housing 200.

[0075] It can be understood that the multiple buckles 210 can also be provided on the face cover 400. Correspondingly, the multiple card slots 420 can be provided on the housing 200, as long as the connection between the face cover 400 and the housing 200 can be realized through the mutual clamping of the multiple buckles 210 and the multiple card slots 420. Other methods such as plugging or screw connection can also be used to realize the connection between the face cover 400 and the housing 200 in this application, and the embodiments of this application do not limit this.

[0076] Furthermore, the housing 200 can be provided with through holes of different shapes such as circular through holes, L-shaped through holes, and straight-through holes. Correspondingly, the side of the face cover 400 facing the housing 200 can be correspondingly provided with ribs of different shapes such as circular ribs, L-shaped reinforcing ribs, and straight-shaped reinforcing ribs. These ribs can be welded to the hole walls of the above-mentioned through holes by hot riveting, or can be connected to the hole walls of the above-mentioned through holes by plugging or interference fit, etc., to further improve the installation reliability of the face cover 400 on the housing 200.

[0077] The shape of the first through hole 410 can be set according to the shape of the indicating window 300. Exemplarily, when the indicating window 300 is square, the first through hole 410 can be square. Or, as Figure 3 and Figure 4 shown, when the indicating window 300 is circular, the first through hole 410 can be circular.

[0078] The number of the first through holes 410 is the same as the number of the indicating windows 300. When the number of the indicating windows 300 is two, the number of the first through holes 410 is also two. One first through hole 410 is opposite to one indicating window 300, and the other first through hole 410 is opposite to the other indicating window 300, and the two first through holes 410 are used to respectively expose the corresponding indicating windows 300.

[0079] Among them, the first through hole 410 can be a through hole provided in the face cover 400 along the direction from the face cover 400 to the housing 200. Based on this, the first through hole 410 can expose the indicating window 300, and an operator can observe the content indicated on the indicating window 300 through the first through hole 410 from the side of the face cover 400 facing away from the base.

[0080] Figure 5 It is a schematic diagram of the combined structure of a face mask assembly provided by an embodiment of this application from another perspective. Figure 6 is Figure 5 a cross-sectional view along the A-A section, Figure 7 is Figure 6 an enlarged view of part B in Figures 5 to 7As shown, in the direction from the face cover 400 to the housing 200, part of the indicating window 300 is located between the housing 200 and the face mask. In this way, part of the face cover 400 can press against the indicating window 300 to clamp the indicating window 300 between the face cover 400 and the housing 200, reducing the possibility that the indicating window 300 is washed off the housing 200 due to the circuit breaker interrupting a large current.

[0081] The face mask in the circuit breaker of this application is in the form of an assembly structure, that is, it includes a plurality of structural members combined with each other. Compared with the integral face mask structure in the related art, it is convenient in this application to make the more important structural members in the face mask assembly 100 from materials with higher strength, so as to improve the overall strength of the face mask assembly 100 without increasing the cost of the face mask assembly 100.

[0082] In addition, on the one hand, the indicating window 300 in the face mask assembly 100 is installed on the housing 200 and thermally riveted to the housing 200. The thermal riveting connection method is convenient for improving the installation reliability of the indicating window 300 on the housing 200 and can reduce the influence of the indicating window 300 being impacted by a large current when the circuit breaker breaks. On the other hand, in the direction from the face cover 400 to the housing 200, part of the indicating window 300 is located between the housing 200 and the face mask, so that part of the face cover 400 can press against the indicating window 300, thereby clamping the indicating window 300 between the face cover 400 and the housing 200, further reducing the possibility that the indicating window 300 is washed off the housing 200 by high-pressure gas due to the circuit breaker interrupting a large current. Therefore, it is convenient to improve the use performance of the circuit breaker.

[0083] Please continue to refer to Figure 3 、 Figures 5 to 7 , in some embodiments, the housing 200 can be provided with a blind groove 220. The indicating window 300 is supported on the bottom of the blind groove 220, and the side wall of the indicating window 300 abuts against the groove wall of the blind groove 220. The face cover 400 presses against the edge of the indicating window 300, and the edge is the part of the indicating window 300 close to the groove wall.

[0084] The blind groove 220 includes a bottom and a notch that are opposite to each other in the direction from the face cover 400 to the housing 200. Among them, the bottom is relatively closer to the base than the notch. The cross-sectional shape of the blind groove 220 can be the same as the shape of the indicating window 300. Exemplarily, when the indicating window 300 is circular, the cross-section of the blind groove 220 can be circular, so that when the indicating window 300 is installed in the blind groove 220, the side wall of the indicating window 300 can abut against the groove wall of the blind groove 220. Among them, the cross-section of the blind groove 220 refers to the section parallel to the notch or the section of the bottom.

[0085] The indicating window 300 can be partially located in the blind groove 220 and supported on the bottom of the blind groove 220 to realize the installation of the indicating window 300 on the housing 200.

[0086] In this embodiment, the indicating window 300 is supported on the bottom of the blind groove 220, enabling the installation of the indicating window 300 on the housing 200. The side wall of the indicating window 300 abuts against the wall of the blind groove 220, so that static friction can be generated between the side wall of the indicating window 300 and the wall of the blind groove 220. In this way, when the circuit breaker interrupts a large current and the indicating window 300 is impacted in the direction from the housing 200 to the face cover 400, under the action of the aforementioned static friction, the housing 200 can restrict the movement of the indicating window 300 towards the face cover 400, thereby reducing the possibility of the indicating window 300 being washed off the housing 200.

[0087] The face cover 400 only presses against the edge of the indicating window 300, rather than pressing against each part of the side of the indicating window 300 facing away from the bottom of the groove. When the face cover 400 clamps the indicating window 300 between the face cover 400 and the housing 200, it will not completely cover the indicating window 300 without any part exposed to the first through hole 410. In this way, while ensuring the reliable installation of the indicating window 300 on the housing 200, the indicating function of the indicating window 300 can be unaffected.

[0088] Figure 8 It is a schematic structural diagram of an indicating window provided by an embodiment of the present application from a perspective. Figure 9 It is a schematic structural diagram of an indicating window provided by an embodiment of the present application from another perspective. Combining Figures 7 to 9 , the indicating window 300 may include a main body portion 310 and an extension portion 320. The main body portion 310 is located in the blind groove 220, the side wall of the main body portion 310 abuts against the wall of the blind groove 220, and the face cover 400 presses against the edge of the main body portion 310. The extension portion 320 is connected to the side of the main body portion 310 facing away from the bottom of the groove, and the side wall of the extension portion 320 abuts against the wall of the first through hole 410.

[0089] The main body portion 310 may be a solid cylindrical structure. Based on this, the diameter of the main body portion 310 may be equal to the diameter of the blind groove 220. In this way, when the main body portion 310 is located in the blind groove 220, the side wall of the main body portion 310 can abut against the wall of the blind groove 220.

[0090] The extension portion 320 may be an annular structure or a semi-annular structure provided on the side of the main body portion 310 facing away from the bottom of the groove, etc. Taking the extension portion 320 as an annular structure and the first through hole 410 as a circular hole as an example, the outer diameter of the extension portion 320 may be equal to the aperture of the first through hole 410. In this way, when the indicating window 300 is installed on the housing 200, the side wall of the extension portion 320 can abut against the wall of the first through hole 410. In addition, the outer diameter of the extension portion 320 may be smaller than the diameter of the main body portion 310, so that the edge of the main body portion 310 can be exposed to abut against the face cover 400.

[0091] Through the above solution, the side wall of the main body portion 310 abuts against the groove wall of the blind groove 220, so that static friction can be generated between the side wall of the main body portion 310 and the groove wall of the blind groove 220. Similarly, the side wall of the extension portion 320 abuts against the hole wall of the first through hole 410, so that static friction can be generated between the side wall of the extension portion 320 and the hole wall of the first through hole 410. In this way, when the circuit breaker breaks a large current and the indicating window 300 is impacted in the direction from the housing 200 to the face cover 400, the movement of the indicating window 300 towards the face cover 400 can be restricted not only by the friction between the groove wall of the blind groove 220 and the side wall of the main body portion 310, but also by the friction between the hole wall of the first through hole 410 and the side wall of the extension portion 320. That is to say, not only can the housing 200 restrict the movement of the indicating window 300 towards the face cover 400, but the face cover 400 can also restrict the movement of the indicating window 300 towards the face cover 400. Thus, the possibility of the indicating window 300 being washed off from the housing 200 can be reduced.

[0092] Figure 10 is Figure 5 a cross-sectional view along the C-C section, Figure 11 is Figure 10 an enlarged view of part D in, Figure 12 is Figure 3 an enlarged view of part E in, as Figure 3 、 Figures 7 to 12 shown. In some embodiments, a plug 330 may be provided on the side of the main body portion 310 facing away from the extension portion 320, and a jack 221 may be provided at a position on the bottom of the groove opposite to the plug 330. The plug 330 is inserted into the jack 221 and abuts against the jack 221.

[0093] The plug 330 may be connected to the edge of the main body portion 310, or may also be connected to a portion of the main body portion 310 close to the edge. The plug 330 may be a fan-shaped structure, a semi-circular ring structure, or the plug 330 may also be a cylindrical or prismatic structure.

[0094] The shape and size of the jack 221 are respectively adapted to the shape and size of the plug 330. Exemplarily, when the plug 330 is a fan-shaped structure or a semi-circular structure, the jack 221 may be an arc-shaped hole. Among them, regardless of the shape of the jack 221, the jack 221 may be a blind hole or a through hole. When the jack 221 is a through hole, the end of the plug 330 away from the main body portion 310 may pass through the jack 221 and abut against the jack 221.

[0095] Figure 8 and Figure 9 the number of plugs 330 shown in is two, Figure 3 and Figure 12The number of jacks 221 shown in [the figure] is two. In practice, the number of inserts 330 and the number of jacks 221 can both be one, or, the number of inserts 330 and the number of jacks 221 can both be greater than or equal to three, as long as the number of inserts 330 is the same as the number of jacks 221, and the inserts 330 and the jacks 221 are in one-to-one correspondence. This application does not make any limitations in this regard.

[0096] The insert 330 is inserted into the jack 221 and abuts against the jack 221, which means that the insert 330 is inserted into the jack 221 and the side wall of the insert 330 contacts the hole wall of the jack 221.

[0097] The insert 330 is inserted into the jack 221 and abuts against the jack 221, so that the insert 330 and the jack 221 have a contact surface, and static friction can be generated between the two. In this way, when the circuit breaker breaks a large current and the indicating window 300 is impacted in the direction from the housing 200 to the face cover 400, under the action of the aforementioned static friction, the jack 221 can limit the movement of the insert 330 towards the face cover 400. Equivalently, the housing 200 can limit the movement of the indicating window 300 towards the face cover 400, thereby reducing the possibility of the indicating window 300 being washed off from the housing 200.

[0098] Please continue to refer to Figure 3 、 Figures 9 to 12 , in some embodiments, a boss 340 can be provided on one side of the body portion 310 facing away from the extension portion 320, and a through hole 222 can be provided at a position opposite to the boss 340 on the bottom of the groove. At least a part of the boss 340 is located in the through hole 222 and abuts against the through hole 222.

[0099] The boss 340 can be a cube-shaped block structure, a cuboid-shaped block structure, a runway-shaped block structure, a cylindrical convex structure, etc.

[0100] The shape and size of the through hole 222 are respectively adapted to the shape and size of the boss 340. Exemplarily, taking the illustrated structure of this application as an example, when the boss 340 is a runway-shaped block structure, the through hole 222 can be a runway-shaped hole. Among them, regardless of the shape of the through hole 222, the through hole 222 can be a blind hole or a through hole. The boss 340 can be partially located in the through hole 222 or can be entirely located in the through hole 222. This application does not make any limitations in this regard.

[0101] Figure 9 The number of bosses 340 shown in [the figure] is one, Figure 12 The number of through holes 222 shown in [the figure] is one. In practice, the number of bosses 340 and the number of through holes 222 can both be multiple, as long as the number of multiple bosses 340 is the same as the number of multiple through holes 222 and they are in one-to-one correspondence, and multiple bosses 340 can be inserted into the corresponding through holes 222 one by one. This application does not make any limitations in this regard.

[0102] The boss 340 is at least partially located within the perforation 222 and abuts against the perforation 222, which means that the boss 340 is inserted into the perforation 222 and the side wall of the boss 340 contacts the side wall of the perforation 222.

[0103] The boss 340 is at least partially located within the perforation 222 and abuts against the perforation 222, so that the boss 340 and the perforation 222 have a contact surface, and static friction can be generated between the two. In this way, when the circuit breaker interrupts a large current and the indicating window 300 is impacted in the direction from the housing 200 to the face cover 400, under the action of the aforementioned static friction, the perforation 222 can restrict the movement of the boss 340 towards the face cover 400. Equivalently, the housing 200 can restrict the movement of the indicating window 300 towards the face cover 400, thereby reducing the possibility of the indicating window 300 being washed off the housing 200.

[0104] In some embodiments, in combination Figures 7 to 11 , one side of the main body portion 310 facing away from the bottom of the groove can be flush with the notch of the blind groove 220.

[0105] With such a setting, when the face cover 400 is connected to the housing 200 and the face cover 400 presses against the edge of the indicating window 300, the size of the circuit breaker in the direction from the face cover 400 to the housing 200 will not increase because one side of the main body portion 310 facing away from the bottom of the groove exceeds the notch of the blind groove 220, which is convenient for realizing the miniaturization of the circuit breaker.

[0106] It can be understood that one side of the main body portion 310 facing away from the bottom of the groove can be non-flush with the notch of the blind groove 220 and is closer to the bottom of the groove relative to the notch. In this way, it can also play a role in not increasing the size of the circuit breaker in the direction from the face cover 400 to the housing 200. However, compared with the flush setting, for the non-flush setting scheme, a protruding portion needs to be provided on the side of the face cover 400 facing the base, and the protruding portion extends between the groove wall of the blind groove 220 and the extension portion 320 to press against the edge of the indicating window 300.

[0107] In other embodiments, in combination Figures 7 to 11 , one side of the extension portion 320 facing away from the main body portion 310 can be flush with one side of the face cover 400 facing away from the housing 200.

[0108] With such a setting, on the premise of ensuring that the side wall of the extension portion 320 abuts against the hole wall of the first through hole 410, the extension portion 320 will not protrude from the face cover 400. In this way, the aesthetic degree of the face mask assembly 100 can be increased, and it can also be avoided that the extension portion 320 protrudes from the face cover 400 and interferes with other structural members outside the face cover 400.

[0109] It should be noted that in this application, only one side of the main body portion 310 facing away from the bottom of the groove can be flush with the notch of the blind groove 220, or only one side of the extension portion 320 facing away from the main body portion 310 can be flush with one side of the face cover 400 facing away from the housing 200. It is also possible that while one side of the main body portion 310 facing away from the bottom of the groove is flush with the notch of the blind groove 220, one side of the extension portion 320 facing away from the main body portion 310 is also flush with one side of the face cover 400 facing away from the housing 200.

[0110] Figure 13 FIG. is a schematic structural view of a housing provided by an embodiment of the present application from another perspective. Figure 14 is Figure 13 an enlarged view of part F in Figure 1 、 Figure 2 、 Figure 13 and Figure 14 In some embodiments, the mask assembly 100 may further include a counter 500. The housing 200 is provided with a mounting hole 230. The counter 500 is at least partially mounted in the mounting hole 230 and is connected to the housing 200. The face cover 400 is provided with a second through hole 430. The position of the second through hole 430 is opposite to the position of the counter 500. The second through hole 430 is used to expose the counter 500.

[0111] The counter 500 can be used to measure the number of times of opening and closing.

[0112] The mounting hole 230 may be a cylindrical straight hole or a stepped hole. The mounting hole 230 illustrated in the present application is a stepped hole. The stepped hole includes a racetrack-shaped hole and a rectangular hole that communicate with each other. The racetrack-shaped hole is closer to the face cover 400 than the rectangular hole.

[0113] The position of the second through hole 430 is opposite to the position of the mounting hole 230. The shape of the second through hole 430 illustrated in the present application is a racetrack-shaped hole.

[0114] The counter 500 can be connected to the housing 200 by an interference fit, or can be connected to the housing 200 by plugging, screw connection, etc. The embodiments of the present application do not limit this.

[0115] The mask assembly 100 includes a counter 500. The number of times of opening and closing of the circuit breaker can be measured through the counter 500, enriching the functions of the circuit breaker. The counter 500 is at least partially mounted in the mounting hole 230 and is connected to the housing 200, which can realize the installation and fixation of the counter 500 on the housing 200. The position of the second through hole 430 is opposite to the position of the counter 500, so that the counter 500 can be exposed through the second through hole 430 when it is mounted on the housing 200. In this way, the operator can observe the number displayed on the counter 500 through the second through hole 430.

[0116] Figure 15 Schematic structural diagram of a counter provided by an embodiment of the present application from one perspective, Figure 16 Schematic structural diagram of a counter provided by an embodiment of the present application from another perspective. In combination with Figure 1 , Figure 2 , Figures 13 to 16 , the counter 500 may include a display portion 510 and a mounting portion 520. At least a part of the display portion 510 is located within the mounting hole 230. The mounting portion 520 is connected to the display portion 510 and is connected to the side of the cover housing 200 facing away from the face cover 400.

[0117] The display portion 510 can be used to display the number of opening and closing operations measured, so as to facilitate the operator to view the number of opening and closing operations. The mounting portion 520 is used to fixedly mount the counter 500 on the cover housing 200.

[0118] The display portion 510 can be a hollow structure, and the mounting portion 520 can be a plate-like structure. The display portion 510 and the mounting portion 520 can be integrally formed to save the assembly process. Alternatively, the display portion 510 can also be separately formed from the mounting portion 520 and then connected by means such as plugging, snap-fitting, or screw connection.

[0119] After the display portion 510 is mounted in the mounting hole 230, a part of it is located within the mounting hole 230, and another part can protrude from the mounting hole 230 and be located within the second through hole 430. The side of the display portion 510 away from the mounting portion 520 can be flush with the face cover 400 to increase the aesthetics of the counter 500.

[0120] Based on the foregoing description, the mounting hole 230 can be a stepped hole as shown in the figure. In this case, the connection of the mounting portion 520 to the side of the cover housing 200 facing away from the face cover 400 means that the mounting portion 520 is connected to the stepped surface of the stepped hole.

[0121] Exemplarily, please continue to refer to Figures 14 to 16 , in some embodiments, the mounting portion 520 can be provided with a connection hole 521, and the side of the cover housing 200 facing away from the face cover 400 can be provided with a connection post 240. The connection post 240 is embedded in the connection hole 521 and is connected to the connection hole 521.

[0122] In the case where the mounting hole 230 is the stepped hole shown in the figure, the connection post 240 is actually provided on the stepped surface of the stepped hole.

[0123] The number of the connection holes 521 and the connection posts 240 shown in the figure is 4 each. In practice, the number of the connection holes 521 and the connection posts 240 can also be 3, 5, etc., as long as the connection holes 521 and the connection posts 240 are in one-to-one correspondence and the connection posts 240 can be respectively embedded in the corresponding connection holes 521.

[0124] The connecting hole 521 can be a round hole or a square hole. Correspondingly, the connecting post 240 can also be a cylinder or a prism. The connecting post 240 can be in interference fit with the connecting hole 521 or can be riveted to the connecting hole 521 so that when the connecting post 240 is embedded in the connecting hole 521, the side wall of the connecting post 240 can abut against the hole wall of the connecting hole 521.

[0125] Through the above solution, the counter 500 can be installed in the direction from the housing 200 to the face cover 400. When the connecting post 240 is embedded in the connecting hole 521 and connected to the connecting hole 521, the mounting portion 520 can be connected to the side of the housing 200 facing away from the face cover 400, realizing the installation of the counter 500 on the housing 200.

[0126] In practical applications, contrary to the setting positions of the illustrated connecting hole 521 and the connecting post 240, the connecting post 240 can also be provided on the side of the mounting portion 520 facing the display portion 510, and the connecting hole 521 can also be provided on the housing 200. The embodiments of the present application do not limit this, as long as the fixing of the mounting portion 520 on the side of the housing 200 facing away from the face cover 400 can be realized.

[0127] Please continue to refer to Figure 2 , in some embodiments, an installation groove 440 can also be provided on the side of the face cover 400 facing away from the housing 200. Two through holes with inconsistent sizes can be provided at the bottom of the installation groove 440. The face mask assembly 100 can also include a nameplate 600 for setting signs such as the model or type of the circuit breaker. The nameplate 600 is provided with two convex posts with inconsistent cross-sectional dimensions.

[0128] When the nameplate 600 is installed on the housing 200, the convex post with a larger cross-sectional dimension extends into the through hole with a larger size, and the convex post with a smaller cross-sectional dimension extends into the through hole with a smaller size. In this way, the nameplate 600 can be prevented from being installed in the wrong direction.

[0129] Please continue to refer to Figure 2 , in some embodiments, the face mask assembly 100 can also include a closing and opening button. Exemplarily, both the housing 200 and the face cover 400 can be provided with installation openings 450, and the closing and opening button is installed in the installation openings 450. Figure 2 Among them, the number of the installation openings 450 is two. The opening button can be installed in one of the installation openings 450, and the closing button can be installed in the other installation opening 450.

[0130] Generally, the face mask assembly 100 reserves a controller installation groove. Some circuit breakers can install a controller in the controller installation groove, but there are also some circuit breakers that do not require or do not have a controller installed.

[0131] In the case where a controller is not required or not installed in the circuit breaker, dust and other debris may enter the interior of the circuit breaker through the controller installation slot, affecting the normal use of the circuit breaker. In view of this, please continue to refer to Figure 13 , in some embodiments, a plurality of spaced-apart seal plate mounting holes 250 may be provided on the side of the housing 200 facing away from the faceplate 400. The plurality of seal plate mounting holes 250 may be used to mount a controller seal plate to block the controller installation slot with the seal plate in the case where the controller is not installed in the circuit breaker.

[0132] Among them, Figure 13 the number of the shown seal plate mounting holes 250 is three. In practice, the number of the seal plate mounting holes 250 may also be two, four, five, etc.

Claims

1. A mask assembly, characterized in that: include: Housing; an indicator window, mounted on the cover and heat-riveted to the cover; A face cover connected to the cover shell, wherein the face cover is provided with a first through hole opposite to the position of the indication window, and the first through hole is used to expose the indication window; In the direction from the face cover to the casing, the indication window is located between the casing and the face cover, and the face cover is pressed against the indication window.

2. The mask assembly according to claim 1, characterized in that The cover shell is provided with a blind groove, the indication window is supported on the bottom of the blind groove, and the side wall of the indication window is in contact with the groove wall of the blind groove, and the surface cover is pressed against the edge of the indication window, and the edge is the part of the indication window close to the groove wall.

3. The mask assembly according to claim 2, characterized in that The indicating window comprises a main body portion and an extending portion; The main body is located in the blind groove, the side wall of the main body abuts against the groove wall of the blind groove, and the surface cover presses against the edge of the main body; The extension portion is connected to a side of the main body portion facing away from the groove bottom, and a side wall of the extension portion abuts against a hole wall of the first through hole.

4. The mask assembly according to claim 3, characterized in that The side of the main body facing away from the groove bottom is flush with the notch of the blind groove; and / or, A side of the extension portion facing away from the main body portion is flush with a side of the surface cover facing away from the casing.

5. The mask assembly according to claim 3, characterized in that: An inserting strip is arranged on one side of the main body facing away from the extending portion, and an inserting hole is arranged at a position of the groove bottom opposite to the inserting strip. The inserting strip is inserted into the inserting hole and abuts against the inserting hole.

6. The mask assembly according to any one of claims 3 to 5, characterized in that: A boss is provided on one side of the main body facing away from the extension portion, a through hole is provided at a position of the groove bottom opposite to the boss, and the boss is at least partially located in and abuts against the through hole.

7. The mask assembly according to claim 1, characterized in that Also includes counters; The cover is provided with a mounting hole, the counter is at least partially mounted in the mounting hole and connected to the cover, the surface cover is provided with a second through hole, the position of the second through hole is opposite to the position of the counter, and the second through hole is used to expose the counter.

8. The mask assembly according to claim 7, characterized in that The counter comprises a display portion and a mounting portion, wherein the display portion is at least partially located in the mounting hole, and the mounting portion is connected to the display portion and to a side of the housing that is away from the surface cover.

9. The mask assembly according to claim 8, characterized in that The mounting portion is provided with a connection hole, and a side of the housing that faces away from the surface cover is provided with a connection column, or a side of the mounting portion that faces the display portion is provided with a connection column, and the housing is provided with a connection hole; The connecting column is embedded in the connecting hole and connected to the connecting hole.

10. A circuit breaker, characterized in that: It comprises a base and the mask assembly according to any one of claims 1 to 9, wherein the base covers the cover shell of the mask assembly.

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