CN218161766U - Backup protection device and surge protector - Google Patents

Abstract

The application provides a backup protection device and a surge protector, and relates to the technical field of circuit protection. The backup protection device comprises a shell and a connecting plate, wherein an opening is formed in a first wall of the shell, and at least part of the connecting plate extends out of the shell from the opening; the shell comprises a first shell and a second shell which are buckled along a first direction, the second shell is provided with a protruding portion, and the protruding portion is used for abutting against the connecting plate along the first direction so that the connecting plate abuts against the side wall of the opening. The backup protection device in the embodiment of the application can realize reliable installation of the connecting plate.

Description

Backup protection device and surge protector

Technical Field

The application relates to the technical field of circuit protection, in particular to a backup protection device and a surge protector.

Background

A Surge Protector (SPD) is also called a lightning protector, and is an electronic Device for providing safety protection for various electronic devices, instruments and meters, and communication lines. When the loop is in fault, the surge protector on the loop can instantly open the cut-off element (such as a circuit breaker) of the loop, and the action immediately performed by the surge protector is the main protection. However, when the surge protector fails, the protection operation cannot be performed in time, and at this time, a backup protection device is usually set for protecting the circuit.

The backup protection device is generally provided with a convex metal connecting plate, one end of the connecting plate, which is positioned inside the device, is connected to a fuse module of the backup protection device, and one end of the connecting plate, which is positioned outside the device, is used for being inserted into a wire inlet port of the surge protector, so that the backup protection device is electrically connected with the surge protector. The existing backup protection device is complex in structure and low in installation stability of the connecting plate, so that the reliability of electric connection between the connecting plate and a conductive part inside the backup protection device is low.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a backup protection device and a surge protector, which can realize reliable installation of a connection plate.

According to an aspect of an embodiment of the present application, there is provided a backup protection device, including a housing having an opening in a first wall thereof, and a connection plate having at least a portion thereof protruding from the housing; the shell comprises a first shell and a second shell which are buckled relatively along a first direction, the second shell is provided with a protruding portion, and the protruding portion is used for abutting against the connecting plate along the first direction so that the connecting plate abuts against the side wall of the opening.

By adopting the above scheme, through set up the bellying on the second casing, utilize the bellying to support and press the connecting plate for the connecting plate can lean on the open-ended lateral wall, and thus, the both sides of connecting plate along first direction receive the restriction of open-ended lateral wall and second casing respectively, thereby keep stable mounted state, can not shift easily or rock, when the connecting plate inserted surge protector's inlet wire port, also enable the electric connection reliability between reserve protection device and the surge protector and improve.

In some embodiments, the inner side of the housing wall of the first housing is provided with a mounting groove extending along the first direction, the connecting plate is at least partially arranged in the mounting groove, and the connecting plate is pressed against the inner surface of the first wall by the groove wall of the mounting groove.

Through adopting above-mentioned scheme, the connecting plate is supported by the cell wall of mounting groove and is pressed at the internal surface of first wall to make the connecting plate receive spacingly in the direction of the first wall of perpendicular to, be difficult to take place to shift or rock, the installation stability of connecting plate further improves.

In some embodiments, the mounting groove comprises two clamping grooves with notches arranged oppositely along a second direction, and the bottom walls of the two clamping grooves limit the connecting plate from two opposite sides of the connecting plate along the second direction; the second direction is parallel to the first wall and perpendicular to the first direction.

Through adopting above-mentioned scheme, two draw-in grooves form spacingly from the both sides of second direction to the connecting plate for the connecting plate is difficult to take place to shift or rock in the second direction, has further improved the installation stability of connecting plate.

In some embodiments, the connection plate includes a body portion and side plates protruding from both sides of the body portion, the side plates being disposed within the card slot.

Through setting up the curb plate, utilize the curb plate to install and realize the draw-in groove spacing to the connecting plate in the draw-in groove for the shape and the structure of this somatic part needn't receive the restriction of draw-in groove, thereby can be crooked this somatic part orientation that needs wantonly, in order to facilitate the use, only need guarantee the curb plate can pack into the draw-in groove can, thereby make the equipment of connecting plate more convenient and efficient.

In some embodiments, the protrusion presses against the side plate in the first direction to cause the connecting plate to abut against the side wall of the opening.

Through adopting above-mentioned scheme, because the curb plate is from this somatic part both sides convex, so, support through the bellying and press the curb plate for the bellying can support and press at the convex position of connecting plate, thereby support more firmly of pressing, be difficult to break away from between bellying and the connecting plate and support the pressure state because of rocking, the installation of connecting plate is also more reliable and more stable.

In some embodiments, the backup protection device further includes a fuse, the fuse being mounted in the housing, and the connection plate includes an abutting portion, the abutting portion being provided on a side of the fuse adjacent to the second housing in the first direction and contacting the fuse to be electrically connected to the fuse.

By adopting the above scheme, the fuse is a structure that the fuse body is fused by the heat generated by the fuse body to break the circuit when the current in the circuit exceeds the specified value in the backup protection device, so the stability of the electric connection between the fuse and the circuit is very important. Because the connecting plate receives supporting of the bellying on the second casing in the first direction to press, locate the fuse with butt portion and be close to second casing one side for when the bellying supports and presses the connecting plate, butt portion can be inseparabler of contact under supporting the effect of pressing with the fuse, make the electricity between fuse and the connecting plate be connected more stably, be favorable to the fuse in time fusing in order to protect the return circuit when the electric current in the return circuit exceeds the specified value.

In some embodiments, the fuse is soldered to the abutment.

By adopting the above scheme, the stability of the electrical connection between the fuse and the abutting part is further enhanced through the soldering connection.

In some embodiments, the opening is located between the first housing and the second housing and is formed by a split of a housing wall of the first housing and a housing wall of the second housing.

Through adopting above-mentioned scheme, when first casing is not assembled with the second casing, the opening border is not sealed, and the connecting plate can be followed opening one side and put into the opening this moment, and needn't adopt to penetrate the mode of wearing out along the open-ended direction and pack into the opening, after second casing and first casing equipment, just can seal the opening border, also can support the connecting plate simultaneously and press on the opening lateral wall, so the installation of connecting plate is convenient and fast more.

In some embodiments, the backup protection device further comprises an indicator light and a circuit board electrically connected with the indicator light, the circuit board being electrically connected with the fuse; the indicator light is exposed outside the shell; the indicating lamp is used for lighting when the circuit where the fuse is located is connected and is extinguished when the circuit where the fuse is located is disconnected.

By adopting the scheme, when the backup protection device is used, whether the fuse state of the fuse is judged through the lighting of the indicating lamp or not can prompt personnel to timely replace the fuse after the fuse is fused, so that the backup protection device can provide real-time protection for a device using the backup protection device.

According to another aspect of the embodiments of the present application, there is provided a surge protector, comprising a backup protection device according to any of the embodiments of the above subject matter, wherein the backup protection device is connected with a wire inlet port of the surge protector through a portion of a connecting plate extending out of a housing.

To sum up, this application embodiment is through setting up the bellying on the second casing, utilizes the bellying to support and presses the connecting plate for the connecting plate can lean on the open-ended lateral wall, and therefore, the both sides of connecting plate edge first direction receive the restriction of open-ended lateral wall and second casing respectively, thereby remain stable installation status, can not shift easily or rock, when the connecting plate inserted surge protector's inlet wire port, also enable the electric connection reliability between reserve protection device and the surge protector and improve, be favorable to forming reliable and stable reserve protection to the return circuit.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a backup protection device according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram illustrating an assembly of an upper shell and a connecting plate of a backup protection device according to an embodiment of the present application.

Fig. 3 is an exploded view of a backup protection device according to an embodiment of the present application.

Fig. 4 is a structural schematic diagram illustrating an assembly of a lower shell and a connecting plate of a backup protection device according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a connection plate according to an embodiment of the present application.

Description of reference numerals: 1. a housing; 11. a first housing; 12. a second housing; 121. a boss portion; 13. a first wall; 14. an opening; 2. a connecting plate; 21. an abutting portion; 22. a body portion; 23. a side plate; 3. mounting grooves; 31. a card slot; 4. a fuse; 5. an indicator light; 6. a circuit board; 7. a slot; y, a first direction; x, the second direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and in the description of the figures are intended to cover, but not exclude, other things. The word "a" or "an" does not exclude a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The directional terms appearing in the following description are directions shown in the drawings and are not intended to limit the specific structure of the backup protection device or surge protector of the present application. For example, in the description of the present application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings for the convenience of description and simplicity of description only, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application.

Further, expressions of directions indicated for explaining the operation and configuration of each member of the backup protection device of the present embodiment, such as the X direction, the Y direction, and the Z direction, are not absolute but relative, and although these indications are appropriate when each member of the battery pack is in the position shown in the drawings, when these positions are changed, these directions should be interpreted differently to correspond to the change.

Furthermore, the terms "first," "second," and the like in the description and claims of this application or in the foregoing drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, either explicitly or implicitly, including one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. "connected" or "connected" of circuit structures may mean not only physically connected but also electrically connected or signal-connected, for example, directly connected, i.e., physically connected, or indirectly connected through at least one intervening component, as long as the circuits are in communication, or communication between the interiors of two components; signal connection may refer to signal connection through a medium, such as radio waves, in addition to signal connection through circuitry. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Fig. 1 shows an overall structural schematic diagram of a backup protection device provided in an embodiment of the present application, and fig. 2 shows a structural schematic diagram of an assembly of an upper housing and a connecting plate of a backup protection device provided in an embodiment of the present application. As shown in fig. 1 and 2, the backup protection device comprises a housing 1 and a connecting plate 2, wherein an opening 14 is formed on a first wall 13 of the housing 1, and at least part of the connecting plate 2 extends out of the housing 1 from the opening 14; the housing 1 includes a first housing 11 and a second housing 12 that are relatively buckled along a first direction Z, the second housing 12 is provided with a protrusion 121, and the protrusion 121 is used for pressing the connecting plate 2 along the first direction so as to enable the connecting plate 2 to abut against the side wall of the opening 14.

The first casing 11 and the second casing 12 are buckled relatively, that is, any one of the first casing 11 and the second casing 12 is located on one side of an opening of the other one, and covers at least one part of the position relation of the opening, and the first casing 11 and the second casing 12 can be fixed in any way after being buckled, for example, the first casing 11 and the second casing 12 are fixed through buckling, screwing, pin fixing, inserting and fixing of a male head and a female head or welding, bonding and the like.

The first wall 13 may only include a partial housing wall of the first housing 11, may only include a partial housing wall of the second housing 12, or may be composed of a partial housing wall of the first housing 11 and a partial housing wall of the second housing 12, for example, in the backup protection device shown in fig. 1, assuming that the first wall 13 is a top wall of the housing 1, the first wall 13 only includes a partial housing wall of the second housing 12, assuming that the first wall 13 is a bottom wall of the housing 1, the first wall 13 only includes a partial housing wall of the first housing 11, and assuming that the first wall 13 is a front side wall of the housing 1, the first wall 13 is composed of a partial housing wall of the first housing 11 and a partial housing wall of the second housing 12.

The opening 14 communicates the inside and the outside of the first wall 13, wherein the inside of the first wall 13 refers to the side of the first wall 13 near the inside of the housing 1, and the outside of the first wall 13 refers to the side of the first wall 13 near the outside of the housing 1. When at least part of the connecting plate 2 extends out of the shell 1 from the opening 14, the part of the connecting plate 2 extending out of the shell 1 is used for being inserted into an incoming line socket of the surge protector and is electrically connected with the surge protector, and when the surge protector is connected in a loop, the backup protection device is also connected into the loop due to the electrical connection with the surge protector, so that the loop is disconnected to protect a corresponding circuit when the current in the loop is abnormal.

It can be seen from fig. 2 that the projection 121 on the second housing 12 is a structure that projects from the housing wall of the second housing 12, and the web 2 has a portion that is located between the projection 121 and the opening 14 (not shown in fig. 2, but it will be understood that a portion of the web 2 projects from the opening 14) and is in contact with the projection 121.

In some embodiments, the opening 14 is provided on a housing wall of the first housing 11. When the backup protection device is assembled, the protrusion 121 may gradually press the connecting plate 2 along with the assembly of the second housing 12 to the first housing 11, so that the connecting plate 2 abuts against the side wall of the opening 14. In this embodiment, the protrusion 121 is pressed against the connecting plate 2 after the second housing 12 is assembled with the first housing 11.

In other embodiments, the opening 14 is provided in a housing wall of the second housing 12. When assembling the backup protection device, the connecting plate 2 may be first installed in the opening 14, the protrusion 121 is pressed against the connecting plate 2, the connecting plate 2 is pressed against the sidewall of the opening 14, and then the second shell 12 and the first shell 11 are assembled. In this embodiment, the abutting state of the projection 121 with the connection plate 2 is not changed by the assembled state of the first housing 11 and the second housing 12.

Fig. 3 is an exploded view of an upper shell, a connecting plate and a lower shell of a backup protection device according to an embodiment of the present application. In still other embodiments, as shown in fig. 3, the opening 14 is provided between the first housing 11 and the second housing 12, and is formed by splitting a housing wall of the first housing 11 and a housing wall of the second housing 12. When the first housing 11 is not assembled with the second housing 12, the periphery of the opening 14 is not closed, and at this time, the connecting plate 2 can be put into the opening 14 from the upper side of the opening 14 without being inserted into the opening 14 in a penetrating direction (i.e., Y direction in fig. 3) of the opening 14, and after the second housing 11 is assembled with the first housing 11, the periphery of the opening 14 is closed, and meanwhile, the connecting plate 2 can be pressed against the side wall of the opening 14, so that the connecting plate 2 is more convenient and faster to mount.

It should be noted that, no matter the structure of any of the above embodiments is adopted, the pressing of the protruding portion 121 against the connecting plate 2 in the state where the first housing 11 and the second housing 12 are assembled is not affected, and the connecting plate 2 can be pressed against the side wall of the opening 14. When the connecting plate 2 abuts against the side wall of the opening 14 under the abutting action of the protruding portion 121, the two sides of the connecting plate 2 in the first direction Z are limited by the side wall of the opening 14 and the second shell 12, so that a stable installation state can be maintained, the connecting plate cannot be easily displaced or shaken, and when the connecting plate 2 is inserted into a wire inlet port of the surge protector, the reliability of electrical connection between the backup protection device and the surge protector can be improved.

Fig. 4 shows a structural schematic diagram of an assembly of a lower shell and a connecting plate of a backup protection device provided in an embodiment of the present application. As shown in fig. 3 and 4, in some embodiments, the backup protection device further includes a fuse 4, the fuse 4 is mounted in the housing 1, the connection plate 2 includes an abutting portion 21, and the abutting portion 21 is provided on a side of the fuse 4 close to the second housing 12 in the first direction Z and contacts the fuse 4 to be electrically connected to the fuse 4.

The fuse 4 is a structure in which when the current in the circuit exceeds a predetermined value in the backup protection device, the fuse element is fused by the heat generated by itself to open the circuit, and therefore, the stability of the electrical connection between the fuse 4 and the circuit is important.

In the above embodiment of the present application, because the connecting plate 2 is pressed by the protrusion 121 on the second housing 12 in the first direction Z, the abutting portion 21 is disposed behind the fuse 4 near the second housing 12, so that when the protrusion 121 presses the connecting plate 2, the abutting portion 21 and the fuse 4 can contact more tightly under the pressing action, even if the fuse 4 and the abutting portion 21 are not fixedly connected, but only abut through the pressing of the protrusion 121, the electrical connection can also be realized, and the loosening condition is not easy to occur between the two, so that the electrical connection between the fuse 4 and the connecting plate 2 is more stable, and the fuse 4 is timely fused to protect the circuit when the current in the circuit exceeds the specified value.

In some embodiments, the fuse 4 is soldered to the abutment 21.

By adopting the above-described configuration, the fusing portion and the abutting portion 21 are further soldered and connected by abutment, and compared with the method in which the fusing portion and the abutting portion 21 are electrically connected by abutment in the previous embodiment, the connection between the fusing portion and the abutting portion 21 is more reliable and firm in this embodiment, and the stability of the electrical connection between the fuse 4 and the abutting portion 21 is further enhanced.

In addition, the fuse 4 and the abutting portion 21 are connected by soldering, and the tin-based alloy is filled between the fuse 4 and the abutting portion 21, has the advantage of low resistance, so that energy consumption in a loop can be reduced, heating at the connecting portion can be reduced, electric sparks cannot be generated by the tin-based alloy when surge impact occurs, and the use safety of a backup protection device is improved.

As shown in fig. 4, in some embodiments, the inner side of the housing wall of the first housing 11 is provided with a mounting groove 3 extending along the first direction Z, the connecting plate 2 is at least partially arranged in the mounting groove 3, and the connecting plate 2 is pressed against the inner surface of the first wall 13 by the groove wall of the mounting groove 3.

By adopting the above scheme, the connecting plate 2 is pressed against the inner surface of the first wall 13 by the groove wall of the mounting groove 3, so that the connecting plate 2 is limited in the direction perpendicular to the first wall 13 (i.e. the Y direction in fig. 4), and is not easy to shift or shake, and the mounting stability of the connecting plate 2 is further improved.

It should be noted that the connection plate 2 is limited in the direction perpendicular to the first wall 13, which means that the connection plate 2 cannot move or can only move within a limited range in the direction perpendicular to the first wall 13, not that the direction of the force applied to the connection plate 2 is necessarily perpendicular to the first wall 13. For example, in some possible embodiments, the direction of the pressing force of the connecting plate 2 by the groove wall of the mounting groove 3 is acute angle with the first wall 13, but the pressing force has a component in the direction perpendicular to the first wall 13, so that the effect of pressing the connecting plate 2 against the inner surface of the first wall 13 can be achieved.

The structure of the mounting groove 3 may be various as long as the connecting plate 2 can be slid in the first direction in the mounting groove 3.

For example, in some embodiments, the mounting groove 3 is a one-piece slot structure, which includes a limiting plate disposed on an inner surface of the first wall 13, a receiving cavity is formed between the limiting plate and the first wall 13, at least a portion of the connecting plate 2 is disposed in the receiving cavity, the limiting plate is disposed opposite to the first wall 13, and the limiting plate presses the connecting plate 2 against the first wall 13, so that the connecting plate 2 is limited in a direction perpendicular to the first wall 13.

In other embodiments, as shown in fig. 4, the mounting groove 3 includes two slots 31 with notches arranged oppositely along the second direction X, and the bottom walls of the two slots 31 limit the connecting plate 2 from two opposite sides of the connecting plate 2 along the second direction X; the second direction X is parallel to the first wall 13 and perpendicular to the first direction Z.

The bottom wall of the card slot 31 refers to an inner wall of the card slot 31 in a direction opposite to the slot opening.

When the notches of the two card slots 31 are disposed opposite to each other in the second direction X, the connection plate 2 can be inserted between the two card slots 31.

It should be noted that, when the bottom walls of the two slots 31 can limit the connecting plate 2 from the two opposite sides of the connecting plate 2, it is described that the size of the connecting plate 2 along the second direction X is greater than the distance between the notches of the two slots 31, and at this time, if the connecting plate 2 is to be smoothly installed in the slots 31, at least one end of the slot 31 along the length direction needs to penetrate through the solid structure where the slot 31 is located, so that the connecting plate 2 can be installed from the penetrated end. For example, in the embodiment shown in fig. 4, the notches of the two card slots 31 are arranged oppositely along the X direction, the length direction of the card slot 31 is parallel to the Z direction, and the upper end of the card slot 31 along the Z direction penetrates through the solid structure where the card slot 31 is located. When the connecting plate 2 is installed, the connecting plate 2 can be installed into the clamping groove 31 from top to bottom along the Z direction, so that the bottom walls of the two clamping grooves 31 limit the connecting plate 2 along the two sides of the X direction.

Through adopting above-mentioned scheme, two draw-in grooves 31 form spacingly from second direction X's both sides to connecting plate 2 for connecting plate 2 is difficult to take place to shift or rock on second direction X, has further improved connecting plate 2's installation stability.

Fig. 5 is a schematic structural diagram of a connecting plate in an embodiment of the present application. As shown in fig. 4 and 5, in some embodiments, the connection plate 2 includes a body portion 22 and side plates 23 protruding from both sides of the body portion 22, and the side plates 23 are disposed in the card slot 31.

The number of the side plates 23 on any one side of the body portion 22 may be one or more, and the number of the side plates 23 on both sides of the body portion 22 may be the same or different, as long as the side plates 23 can be fitted into the card slots 31 on the corresponding side.

Through setting up curb plate 23, utilize curb plate 23 to install and realize that draw-in groove 31 is spacing to connecting plate 2 in draw-in groove 31 for the shape and the structure of this somatic part 22 needn't receive the restriction of draw-in groove 31, thereby can be crooked this somatic part 22 towards arbitrary required direction, with convenient to use, thereby make the equipment of connecting plate 2 more convenient and efficient.

For example, the body portion 22 may include an exposed portion and a mounting portion, the mounting portion being located inside the housing 1 for connection with components inside the housing 1; the exposed part is used for extending out of the shell 1 from the opening 14 and is used for being connected with the surge protector; a certain included angle can be formed between the mounting part and the exposed part so as to limit the mounting part and the shell wall of the shell 1 mutually, and the mounting firmness of the connecting plate 2 is ensured. The components inside the housing 1 include, but are not limited to, the mounting slot 3 and the fuse 4.

In some embodiments, when the connection plate includes the side plate 23, the protrusion 121 may press the side plate 23 in the first direction Z to make the connection plate 2 abut on the side wall of the opening 14.

By adopting the above scheme, since the side plate 23 protrudes from both sides of the body portion 22, the protruding portion 121 abuts against the side plate 23, so that the protruding portion 121 can abut against the protruding portion of the connecting plate 2, the abutting is firmer, the protruding portion 121 and the connecting plate 2 are not easily separated from the abutting state due to shaking, and the connecting plate 2 is more stably and reliably mounted.

As shown in fig. 3 and 4, in some embodiments, the backup protection device further includes an indicator lamp 5 and a circuit board 6 electrically connected to the indicator lamp 5, the circuit board 6 being electrically connected to the fuse 4; the indicator lamp 5 is exposed outside the shell 1; the indicator lamp 5 is turned on when the circuit in which the fuse 4 is located is turned on, and is turned off when the fuse 4 is blown.

Since the indicator lamp 5 is exposed to the outside of the housing 1, a person can observe the lighting state of the indicator lamp 5 from the outside of the backup protection device, and can determine the abnormal state of the fuse by whether the indicator lamp 5 is lit or not. The indicator lamp 5 may be exposed from the first housing 11, may be exposed from the second housing 12, or may be exposed between the first housing 11 and the second housing 12. Wherein, expose and to mean that pilot lamp 5 can be seen from the shell 1 outside, and in the actual product, can be through setting up the hole on shell 1, pilot lamp 5 is seen from downthehole, also can set up transparent window on shell 1, and pilot lamp 5 is located the window, and pilot lamp 5 sees through the window.

For example, when the backup protection device is in use, if the circuit is normally switched on, the indicator lamp 5 is turned on, when surge current occurs, and the fuse 4 is blown, the circuit where the fuse 4 is located is turned off, the indicator lamp 5 is turned off, personnel can check the backup protection device, remove faults, and replace the fuse 4 if the fuse 4 is confirmed to be blown, so that the backup protection device can provide real-time protection for the device using the backup protection device.

In some embodiments, a slot 7 is provided in the housing 1, and the circuit board 6 is mounted in the slot 7.

The slot 7 may be disposed on an inner wall of the first housing 11, an inner wall of the second housing 12, or both the inner wall of the first housing 11 and the inner wall of the second housing 12 may be disposed with the slot 7. When the slot 7 is provided in both the first housing 11 and the second housing 12, the circuit board 6 is partially located in the slot 7 on the first housing 11 and partially located in the slot 7 on the second housing 12.

For example, the slot 7 may be provided on one side inner wall of the first housing 11 to fix the circuit board 6 from one end of the circuit board 6; the slot 7 may also be disposed on inner walls of two opposite sides of the first housing 11 to fix the circuit board 6 from two ends of the circuit board 6, and the position and the number of the slot 7 are not limited in the embodiment of the present application.

The slot 7 facilitates the installation of the circuit board 6 and facilitates the circuit board 6 to be kept in a fixed position so as to facilitate the stable electrical connection between the indicator lamp 5 and the fuse 4 through the circuit board 6.

The embodiment of the application also provides a surge protector which comprises the backup protection device of any one of the embodiments, wherein the backup protection device is connected with the wire inlet port of the surge protector through the part of the connecting plate 2, which extends out of the shell 1.

The relevant beneficial effects of the surge protector have been described in detail in the above embodiment of the backup protection device, and the embodiment of the present application is not described again.

To sum up, this application embodiment is through setting up bellying 121 on second casing 12, utilize bellying 121 to support and press connecting plate 2 for connecting plate 2 can lean on the lateral wall of opening 14, and therefore, connecting plate 2 receives the restriction of the lateral wall of opening 14 and second casing 12 respectively along the both sides of first direction, thereby keep stable mounted state, can not shift easily or rock, when connecting plate 2 inserted surge protector's inlet wire port, also can make the electric connection reliability between reserve protection device and the surge protector improve, be favorable to forming reliable and stable reserve protection to the return circuit.

Those of skill in the art will understand that while some embodiments herein include certain features included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims (10)

1. A backup protection device is characterized by comprising a shell and a connecting plate, wherein an opening is formed in a first wall of the shell, and at least part of the connecting plate extends out of the shell from the opening;

the shell comprises a first shell and a second shell which are oppositely buckled along a first direction, the second shell is provided with a protruding portion, and the protruding portion is used for abutting against the connecting plate along the first direction so that the connecting plate abuts against the side wall of the opening.

2. A backup protection device according to claim 1, characterized in that the inner side of the housing wall of the first housing is provided with a mounting groove extending in the first direction, the connecting plate being at least partially provided in the mounting groove, the connecting plate being pressed against the inner surface of the first wall by the groove wall of the mounting groove.

3. The backup protection device according to claim 2, wherein the mounting groove comprises two slots with notches arranged oppositely along a second direction, and bottom walls of the two slots limit the connecting plate from two opposite sides of the connecting plate along the second direction; the second direction is parallel to the first wall and perpendicular to the first direction.

4. A backup protection device according to claim 3, wherein the connection plate comprises a body portion and side plates projecting from both sides of the body portion, the side plates being disposed in the card slot.

5. A backup protection device according to claim 4, characterized in that the boss presses against the side plate in the first direction to cause the connecting plate to abut against the side wall of the opening.

6. A backup protection device according to claim 1, further comprising a fuse mounted in said housing, said connecting plate including an abutting portion provided in said first direction on a side of said fuse closer to said second housing and in contact with said fuse to be electrically connected to said fuse.

7. A backup protection device according to claim 6, characterized in that the fuse is soldered to the abutment.

8. A backup protection device according to claim 1, wherein said opening is located between said first housing and said second housing and is formed by a split of a housing wall of said first housing and a housing wall of said second housing.

9. A backup protection device according to any one of claims 6 to 8, further comprising an indicator light and a circuit board electrically connected to said indicator light, said circuit board being electrically connected to said fuse; the indicator light is exposed outside the shell; the indicating lamp is used for being lightened when a circuit where the fuse is located is connected, and is extinguished when the fuse is fused.

10. A surge protector comprising the backup protection device according to any one of claims 1 to 9, wherein the backup protection device is connected to a line inlet port of the surge protector through a portion of the connection plate protruding out of the housing.

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