CN117060326A - Surge protection device with remote signaling alarm device - Google Patents

Abstract

The patent application discloses a surge protection device with remote signaling alarm device. A surge protection device according to the present application includes: an inner housing; a sliding plate for mounting in the inner housing and sliding between a first position and a second position; and a remote signaling alarm device including a plastic housing, a first electrode sheet, a second electrode sheet, and a key installed in the plastic housing, wherein when the sliding plate is located at one of the first position and the second position, the key is pressed to move downward, thereby causing the first electrode sheet to elastically deform, and when the sliding plate is located at the other of the first position and the second position, the key does not cause the first electrode sheet to elastically deform.

Description

Surge protection device with remote signaling alarm device

Technical Field

The present application relates to an electrical device, and more particularly to a surge protection device having a novel remote signaling alarm device, thereby improving safety design margin and stability of contact.

Background

The surge protector is an electrical safety protection device and can provide safety protection for various electronic equipment, instruments and meters and communication lines. Typically, when a spike current or voltage is suddenly generated in an electrical circuit or a communication line due to external interference (e.g., lightning), a surge protector can limit the transient overvoltage entering a power line, a signal transmission line to a voltage range that can be borne by a device or a system in a very short time, or leak the spike current into the ground, so as to avoid damage to other devices in the circuit caused by the surge. Surge protectors typically include a trip structure. The trip structure generates a trip action in response to an event such as a spike current or voltage, thereby breaking the connection between the two conductive structures. For example, some prior art techniques employ a thermal trip structure formed by low temperature welding of a metal spring and a metal electrode tab, and when thermal trip occurs, the metal spring breaks away from the metal electrode tab, and the electrical connection between the two is physically broken. Meanwhile, the inside of the surge protector can be further provided with a sliding block reset by a spring, and under the condition that the metal elastic sheet is separated from the metal electrode sheet (namely, thermal tripping occurs), the resetting action of the sliding block is not blocked, so that the sliding block is reset and slides. When the sliding block reaches the reset position, an insulating part of the sliding block is interposed between the metal elastic sheet and the metal electrode sheet, so that the electrical isolation between the metal elastic sheet and the metal electrode sheet is further ensured.

The surge protector can further comprise a remote signaling alarm device. For example, in chinese patent publication CN111769533a, there is described a surge protector in which a remote signaling alarm device includes a first remote signaling electrode (stationary contact) and a second remote signaling electrode (movable contact) mounted in a bottom case, a slider of the surge protector is capable of pressing the second remote signaling electrode so that one end of the second remote signaling electrode is pressed against the first remote signaling electrode, and when a trip occurs, the slider of the surge protector is moved away from a home position by a spring so as not to press the second remote signaling electrode any more, a distal end of the second remote signaling electrode is sprung up, and an electrical connection between the second remote signaling electrode and the first remote signaling electrode is broken, thereby generating an alarm signal.

With the trend of increasingly miniaturized surge protectors, such remote signaling alarms as described above face some challenges: the movable contact and the stationary contact need to be accurately assembled to realize the contact between the movable contact and the stationary contact, and the tolerance of a plurality of matching pieces is accumulated, so that the contact pressure deviation is large, and the contact resistance is influenced; in addition, miniaturized spare part also warp inefficacy in part packing and installation in-process, influences the assembly effect. These problems may lead to poor contact of the remote signaling electrode pad and loss of the alarm function. In addition, in the manufacturing level of parts, the existing structure has high requirements on the dimensional accuracy of the parts, and further has high requirements on the processing technology (such as a metal electrode plate bending technology), which is not beneficial to the economical efficiency of production.

Therefore, there is a need to develop a remote signaling alarm structure for surge protector designs that has high contact reliability and can be installed efficiently.

Disclosure of Invention

To above-mentioned problem, this patent application proposes a surge protection device, and it has novel remote signaling alarm device, improves safe design margin from this, has improved the stability of contact.

According to a first aspect of the present application, there is provided a surge protection device comprising: an inner housing; a sliding plate for mounting in the inner housing and sliding between a first position and a second position; and a remote signaling alarm device including a plastic housing, a first electrode sheet, a second electrode sheet, and a key installed in the plastic housing, wherein when the sliding plate is located at one of the first position and the second position, the key is pressed to move downward, thereby causing the first electrode sheet to elastically deform, and when the sliding plate is located at the other of the first position and the second position, the key does not cause the first electrode sheet to elastically deform.

In the above-mentioned scheme of the surge protection device, as an optional implementation manner, the first electrode plate and the second electrode plate in the remote signaling alarm device are set to be in a normally open state, and when the key is pressed to cause the elastic deformation of the first electrode plate, the first electrode plate and the second electrode plate are connected with each other.

In the above-mentioned scheme of the surge protection device, as an optional implementation manner, the first electrode plate and the second electrode plate in the remote signaling alarm device are set to be in a normally closed state, and when the first electrode plate is elastically deformed due to the pressing action of the key, the first electrode plate and the second electrode plate are disconnected from each other.

In the scheme of the surge protection device, as an optional implementation manner, the remote signaling alarm device further comprises a pressing spring piece, one end of the pressing spring piece is installed in the plastic shell, and the spring arm at the other end of the pressing spring piece can press the key after being pressed and deformed.

In the above scheme of the surge protection device, as an optional implementation manner, the first position is a position where the sliding plate is located when the trip welding point of the surge protection device is not tripped and disconnected, and the second position is a position where the sliding plate is reached after the spring pulls the trip welding point of the surge protection device.

In the above scheme of the surge protection device, as an optional implementation manner, the sliding plate is provided with a bottom remote signaling operation structure, and the bottom remote signaling operation structure includes a spring plate pressing block.

In the above-mentioned scheme of the surge protection device, as an optional implementation manner, the bottom remote signaling manipulation structure further includes a bottom plate structure recessed from a bottom surface of the sliding plate, and a gradually raised slope structure located at one side of the bottom plate structure.

In the foregoing arrangement of the surge protection device, as an optional implementation manner, the sliding plate further includes a side baffle plate connected to the bottom plate structure and the inclined plane structure.

In the above scheme of the surge protection device, as an optional implementation manner, when the sliding plate contacts the pressing spring of the remote signaling alarm device through the spring pressing block, the pressing spring deforms and presses the key downwards to a first position, so that the first electrode plate is pressed and deformed and contacts the second electrode plate.

In the above scheme of the surge protection device, as an optional implementation manner, when the sliding plate does not contact the pressing spring of the remote signaling alarm device through the spring pressing block structure, the pressing spring does not press the key.

In the scheme of the surge protection device, as an optional implementation manner, the surge protection device further comprises a trip welding point, the trip welding point prevents the sliding plate from moving in the inner shell when the trip welding point is not tripped and disconnected, the elastic sheet pressing block of the sliding plate contacts with the pressing elastic sheet of the remote signaling alarm device when the trip welding point is tripped and disconnected, and the elastic sheet pressing block of the sliding plate is separated from contact with the pressing elastic sheet of the remote signaling alarm device when the trip welding point is tripped and disconnected.

In the scheme of the surge protection device, as an optional implementation manner, the surge protection device further comprises a trip welding point, the trip welding point prevents the sliding plate from moving in the inner shell when the trip welding point is not tripped and disconnected, the elastic sheet pressing block of the sliding plate is not contacted with the pressing elastic sheet of the remote signaling alarm device when the trip welding point is tripped and disconnected, and the elastic sheet pressing block of the sliding plate is contacted with the pressing elastic sheet of the remote signaling alarm device when the trip welding point is tripped and disconnected.

In the above scheme of the surge protection device, as an optional implementation manner, the plastic housing of the remote signaling alarm device is assembled by a plurality of components.

In the above scheme of the surge protection device, as an optional implementation manner, the plastic housing of the remote signaling alarm device is assembled by an upper housing and a lower housing.

In the above-mentioned scheme of the surge protection device, as an optional implementation manner, the first electrode sheet is longer than the second electrode sheet; the lower part of the first electrode plate is provided with a lower end pin, and the upper part of the first electrode plate is provided with a first connecting sheet which is bent in advance; the lower part of the second electrode plate is provided with a lower end pin, and the upper end of the second electrode plate is provided with a second connecting sheet which is bent in advance.

In the above-mentioned scheme of the surge protection device, as an alternative implementation manner, in the plastic housing, the first connecting piece and the second connecting piece are spaced apart from each other by a distance and are opposite to each other in a vertical direction.

In the above-mentioned scheme of the surge protection device, as an optional implementation manner, a raised contact area is provided on at least one of the first connection piece and the second connection piece so as to promote electrical contact between the first connection piece and the second connection piece.

In the above-mentioned scheme of the surge protection device, as an optional implementation manner, the raised contact area is a bump for forming point contact, or a raised strip for forming line contact.

In the above scheme of the surge protection device, as an optional implementation manner, the surge protection device further includes a first current strip and a varistor element, the varistor element is mounted on a side of the inner casing opposite to the sliding plate, and a front electrode on the varistor element is electrically connected with an extension electrode of the first current strip through a window on the inner casing.

In the above scheme of the surge protection device, as an optional implementation manner, the surge protection device further includes a second current strip and a piezoresistor element, wherein one end of the second current strip forms a pin of the surge protection device, and the other end forms an elastic clip structure, and the elastic clip structure is used for receiving and fixing a side extraction electrode of the piezoresistor element.

In the above-mentioned scheme of the surge protection device, as an optional implementation manner, the surge protection device further includes a spring for pulling the sliding plate, one end of the spring is fixed on the inner housing, and the other end of the spring is fixed on the sliding plate.

According to a second aspect of the present application, a surge protector is presented, comprising an outer housing, and a surge protection device as described in any of the preceding paragraphs.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the accompanying drawings:

fig. 1 shows a perspective view of a surge protection device according to an embodiment of the present application.

Fig. 2A illustrates an exploded view of a first view of a surge protection device according to an embodiment of the present application.

Fig. 2B illustrates an exploded view of a second perspective of a surge protection device in accordance with an embodiment of the present application.

Fig. 3A shows a perspective view of an inner housing in the surge protection device shown in fig. 1.

Fig. 3B illustrates a perspective view of another view of the inner case illustrated in fig. 3A.

Fig. 4A shows a perspective view of a varistor element in the surge protection device shown in fig. 1.

Fig. 4B shows a perspective view of another view of the piezoresistive element shown in fig. 4A.

Fig. 5A shows a perspective view of a sliding plate in the surge protection device shown in fig. 1.

Fig. 5B shows a schematic view of the bottom side view of the sliding plate shown in fig. 5A.

Fig. 5C illustrates a perspective view of the rear side view of the sliding plate illustrated in fig. 5A.

Fig. 6A shows a perspective view of a remote signaling alarm device in the surge protection device shown in fig. 1.

Fig. 6B shows a schematic view of the electrode structure of the remote signaling device of fig. 6A after removal of the injection molded housing portion.

Fig. 7A shows a cross-sectional view of the surge protection device in an unbuckled state, and fig. 7B shows a cross-sectional view of the surge protection device in a tripped state.

Fig. 8A shows a perspective view of a normally closed remote signaling alarm device according to another embodiment of the present application.

Fig. 8B shows a schematic view of the electrode structure of the remote signaling device shown in fig. 8A after removal of the injection molded housing portion.

Fig. 9 shows a cross-sectional view of a surge protection device including the telemetry signaling device shown in fig. 8A in an un-tripped state.

Fig. 10 shows an assembly relationship diagram of a second current bar and a varistor element in a surge protection device in accordance with a further embodiment of the present application.

Fig. 11 shows a schematic view of another view of a second current bar in a surge protection device according to a further embodiment of the application.

Fig. 12A shows a schematic view of a surge protection device and a mating outer housing according to an embodiment of the application.

Fig. 12B shows the surge protector of fig. 12A assembled with the mating outer housing.

Detailed Description

In the following description, the present patent application is described with reference to various embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other alternative and/or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of various embodiments of the present patent application. Similarly, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the present patent application. However, the present patent application may be practiced without specific details. Furthermore, it should be understood that the embodiments shown in the drawings are illustrative representations and are not necessarily drawn to scale.

The various embodiments and variations of the present application are further described below with reference to the accompanying drawings.

Fig. 1 shows a perspective view of a surge protection device 100 according to an embodiment of the present application. Fig. 2A shows an exploded view of a first view of surge protection device 100 in accordance with an embodiment of the present application. Fig. 2B shows an exploded view of a second perspective of surge protection device 100 in accordance with an embodiment of the present application. Fig. 3A shows a perspective view of inner housing 110 in surge protection device 100 shown in fig. 1. Fig. 3B illustrates a perspective view of another view of the inner case 110 illustrated in fig. 3A. Fig. 4A shows a perspective view of the varistor element 120 in the surge protection device 100 shown in fig. 1. Fig. 4B illustrates a perspective view of another view of the piezoresistive element 120 illustrated in fig. 4A. Fig. 5A shows a perspective view of a sliding plate 180 with a bottom side pressure plate in the surge protection device 100 shown in fig. 1. Fig. 5B illustrates a schematic view of the bottom side view of the sliding plate 180 illustrated in fig. 5A. Fig. 5C illustrates a perspective view of the rear side view of the sliding plate 180 illustrated in fig. 5A.

Referring to fig. 1, 2A to 2B, 3A to 3B, 4A to 4B, and 5A to 5C, the surge protection device 100 includes an inner case 110, a varistor element 120 mounted on the rear side of the inner case 110 (the front-rear direction is in the state shown in fig. 1), and a sliding plate 130 (also referred to as a "blade") mounted on the front side of the inner case. A socket pin 1401 is formed at one end of the first current bar 140, and an extension electrode 1402 extending laterally and bending is provided at the other end, and a fixing piece 1403 is provided at the end of the extension electrode, and the fixing piece 1403 can be soldered onto a front electrode 1201 (as shown in fig. 4A) on the piezo-resistive element 120 located at the rear side of the inner case 110, and the front electrode 1201 reaches or partially enters the cavity space at the front side of the inner case 110 through a window 1105 in the inner case 110. This low temperature weld forms a thermal trip point. The fixing piece 1403 may be provided with a welding hole to facilitate electric welding.

The second current strip 150 is inserted from the rear side of the inner housing 110, is connected to the extraction electrode 1202 on the varistor element 120, and is extracted further to form another plug pin of the surge protection device.

The sliding plate 180 may be slidably installed in a cavity space of the front side of the inner housing 110, and in the present application, a cavity formed by being partially enclosed in the front side of the inner housing 110 is referred to as a sliding cavity. The initial position of the sliding plate 180 is to the right of the sliding cavity as shown in fig. 1. On the right side of the inner housing 110, upper and lower side walls are formed lateral upper and lower positioning flanges 1101 and 1102, respectively (as shown in fig. 3A), thereby forming a guide groove structure into which the rear end (right end in fig. 5A) of the slide plate 180 is fitted.

A first spring positioning post 1803 (see fig. 5A) is provided on the right side of the sliding plate 180, a second spring positioning post 1103 (see fig. 3A) is provided on the left side of the inner housing 110, one end of the spring 130 is positioned on the first spring positioning post 1803 on the sliding plate 180, and the other end is positioned on the second spring positioning post 1103 on the inner housing, so that the restoring force of the spring 130 can pull the sliding plate 180 to the left side.

As shown in fig. 5A, the upper right side of the slide plate 180 is provided with a partition panel 1805, the partition panel 1805 including a front bevel 1805A and a rear flat surface 1805B. When the thermal trip point is not open, the thermal trip point forms a stop for the partition panel 1805 of the sliding plate 180, thus preventing the sliding plate 180 from moving to the left. When the thermal trip point is broken, the restoring force of the spring 130 moves the sliding plate 180 to the left, and the front bevel 1805A of the partition panel of the sliding plate 180 facilitates the partition panel 1805 to enter under the stator 1403 of the extension electrode 1402, thereby substantially breaking the electrical connection between the extension electrode 1402 and the front electrode 1201 on the piezo-resistive element 120.

As shown in fig. 1, a remote signaling device 190 is installed at the lower portion of the inner housing 110. Fig. 6A shows a perspective view of a remote signaling alarm device 190 in the surge protection device 100 shown in fig. 1. Fig. 6B shows a schematic diagram of the electrode structure of the remote signaling device 190 shown in fig. 6A after the plastic housing is removed.

As shown in fig. 6A and 6B, the remote signaling device 190 includes a molded housing 1905. In the molded case 1905, a first electrode sheet 1901, a second electrode sheet 1902, a pressing spring sheet 1903, and a key 1904 are mounted. The first electrode tab 1901 and the second electrode tab 1902 are made of an electrically conductive material, wherein the first electrode tab 1901 is longer than the second electrode tab 1902. The first electrode plate 1901 has a lower end pin 19011 at a lower portion and a first connection plate 19012 bent at about 90 degrees in advance at an upper portion. The lower portion of the second electrode plate 1902 is provided with a lower end pin 19021, and the upper end is provided with a second connecting plate 19022 which is pre-bent by about 90 degrees. The first and second connection pieces 19012 and 19022 are spaced apart from each other by a distance and vertically opposite to each other. The pressing spring 1903 may be made of conductive metal or other materials with elastic restoring force. The pressing spring plate 1903 comprises a mounting base section 19031 and a spring arm 19032, and the spring arm 19032 can be elastically deformed under the action of external force so as to push the key 1904 to move downwards. The downward movement of the key 1904 pushes the first connection piece 19012 of the first electrode piece 1901 to be elastically deformed downward, so that the lower portion of the first connection piece 19012 and the upper portion of the second connection piece 19022 come into contact. The plastic housing 1905 may be used to mount and position the first electrode pad 1901, the second electrode pad 1902, the pressing dome 1903, and the key 1904 as shown in fig. 6B. The plastic housing 1905 may be constructed in a two-piece structure of an upper case 1905A and a lower case 1905B, as shown in fig. 6A, in which the mounting base section 19031 of the pressing spring plate 1903 is fitted, and the key 1904 is also fitted. However, it should be understood that other configurations are possible, and thus the two-piece construction of the plastic housing 1905 may not constitute a limitation of the present application. Other implementations of the plastic housing may include an integrally injection molded housing, or a housing assembled from three or more components.

A mounting and positioning structure adapted to the remote signaling device 190 is formed at the lower part of the inner housing 110. The mounting and positioning structure may receive the molded housing 1905 of the remote signaling device 190 and position the molded housing 1905 within the inner housing 110 by way of a snap fit or other means commonly employed in the art. When the plastic housing 1905 is mounted in place, the two lower pins 19011 and 19012 protrude from the opening in the lower portion of the inner housing 110, and the spring arms 19032 of the pressing spring plate 1903 enter the sliding cavity of the inner housing 110 and are pressed by the lower end portions of the sliding plates 180.

As shown in fig. 6B, raised contact areas are provided at the lower portion of the first connection piece 19012 of the first electrode piece 1901 and the upper portion of the second connection piece 19022 of the second electrode piece 1902, respectively, to promote reliable electrical contact therebetween. In one implementation, the contact region may be a bump-like shape to facilitate forming a point contact. In another implementation, the contact areas may be ribs to facilitate the formation of line contacts. In a further variation, a raised contact region may be formed on only one of the first connection tab 19012 and the second connection tab 19022.

It should be appreciated that in use, the surge protection device 100 also includes a housing (not shown) for accommodating the structure shown in fig. 1.

Fig. 7A is a sectional view of the surge protection device 100 in an unbuckled state, and fig. 7B is a sectional view of the surge protection device 100 in a tripped state. The bottom remote signaling manipulation structure of the sliding plate 180 and the remote signaling switching function implemented thereby are further described in conjunction with fig. 5A-5C, and fig. 7A-7B.

As shown in fig. 5B and fig. 7A-7B, the remote signaling manipulation structure includes a dome pressing block 181 at the bottom of the sliding plate 180. In this embodiment, the "dome pressing block" is intended to mean a structure for applying a pressing force to the key 1904 of the remote signaling device 190 when the slide plate 180 is in an un-tripped state. Fig. 5B illustrates an exemplary construction of the dome pressing block, in which the dome pressing block 181 is formed at the bottom side of the sliding plate 180, and when the sliding plate 180 is in the un-tripped state shown in fig. 7A, the dome pressing block 181 forms a downward press on the end of the dome arm 19032 of the pressing dome 1903 of the remote signaling alarm device 190, so that the dome arm 19032 elastically deforms and applies a downward press on the key 1904, and the key 1904 moves downward under the pressing action, so that two electrode pads in the remote signaling alarm device 190 are turned on when the pressing action occurs. As shown in fig. 7A, the spring plate press 181 may be further configured to have a slope 1811 facing downward to the left so as to make a more sufficient surface contact with the end of the spring arm 19032 pressing the spring plate 1903. As shown in fig. 5B and 7B, the bottom remote signaling manipulation structure of the sliding plate 180 further includes a bottom plate structure 1821 recessed from the bottom surface of the sliding plate 180 behind the spring plate press block 181, and a gradually rising slope structure 1822 at one side of the bottom plate structure 1821. In the tripped state, the sliding plate 180 moves to the left to the state shown in fig. 7B, and at this time, the space defined by the bottom plate structure 1821 and the inclined surface structure 1822 of the bottom remote signaling manipulation structure can allow the spring arm 19032 of the pressing spring plate 1903 to return freely to the initial state without elastic deformation, so that the downward pressing action on the key 1904 is released, and at this time, the two electrodes in the remote signaling alarm device 190 are broken.

Further, the sliding plate 180 may further include a side shield 1823 disposed on one side of the sliding plate 180 and coupled to the base plate structure 1821 and the bevel structure 1822, wherein the side shield 1823 may better enclose or encapsulate the remote signaling device 190 in the sliding plate 180.

According to the embodiment shown in fig. 5A-5C, when the surge protection device 100 is not tripped, the spring plate pressing block 1821 of the sliding plate 180 presses on the pressing spring plate 1903, so that the pressing spring plate 1903 elastically deforms, so that the key 1904 is sufficiently pressed down, and further, the first connection piece 19012 of the first electrode piece 1901 is also pressed and deformed, and the second connection piece 19022 of the second electrode piece 1902 reliably contacts; when the surge protection device 100 is tripped, the sliding plate 180 moves leftward, and at this time, the pressing spring plate 1903 is no longer subject to the physical interference of the spring plate pressing block 1821 (i.e., the spring plate pressing block 1821 of the sliding plate and the pressing spring plate 1903 are out of contact), so that no elastic deformation occurs, or only a small elastic deformation occurs, and thus, the key 1904 is not pressed, and at this time, the electrical connection between the first connection piece 19012 of the first electrode piece 1901 and the second connection piece 19022 of the second electrode piece 1902 is released.

It will be appreciated that in a variation, the bottom remote signaling manipulation structure of the sliding plate and the configuration of the remote signaling alarm device may be adjusted such that the key in the remote signaling alarm device is not pressed when the sliding plate is in the un-tripped position (i.e., the spring plate press block of the sliding plate and the pressing spring plate are out of contact), and the key in the remote signaling alarm device is pressed when the sliding plate is in the tripped position.

In the above embodiment, because the design based on the pressing spring plate, the key and the plastic shell is adopted for the remote signaling alarm device, the remote signaling alarm device has high structural precision, and the positioning after being assembled into the inner shell is accurate, so that the limit structure of the inner shell is correspondingly simplified, and the installation efficiency is improved. Meanwhile, the contact quality can be ensured by only controlling the geometric dimension of the bottom side structure of the sliding block, and the influence of accumulated tolerance is greatly reduced.

In the above paragraphs, the remote signaling alarm 190 is described as a "normally closed" scheme, i.e., before tripping, the first electrode 1901 and the second electrode 1904 are in a closed state, and after tripping, the two electrode are turned from closed to open. It can be understood that the remote signaling alarm device can adopt a normally open scheme, namely, an open state is formed between the two electrodes before tripping, and the two electrode plates are switched from open to closed after tripping.

The above-described normally open scheme of a remote signaling device can be understood in conjunction with the exemplary structures of fig. 8A, 8B, and 9. Fig. 8A is a perspective view of a remote signaling device 290 according to another embodiment of the present application, fig. 8B is a schematic view illustrating an electrode structure of the remote signaling device 290 shown in fig. 8A after removing an injection molded housing part, and fig. 9 is a sectional view illustrating a surge protection device including the remote signaling device 290 shown in fig. 8A in an un-tripped state.

As shown in fig. 8A, the normally closed remote signaling device 290 may have the same or similar appearance as the normally open remote signaling device 190, and in particular, similar to the normally open remote signaling device 190, the plastic housing 2905 of the normally closed remote signaling device 290 may be a two-piece structure consisting of an upper housing 2905A and a lower housing 2905B. A first electrode tab 2901, a second electrode tab 2902, a pressing spring tab 2903, and a button 2904 are mounted in the plastic case 2905.

As further shown in fig. 8B, a plastic housing 2905 may be used to mount and position the first electrode tab 2901, the second electrode tab 2902 (in the embodiment of the present application, the electrode tab deformed by the pressing of the key is referred to as a second electrode tab for convenience of distinction), the pressing spring 2903, and the key 2904 as shown in fig. 8B. The first electrode tab 2901 and the second electrode tab 2902 are made of a conductive material, wherein the first electrode tab 2901 is longer than the second electrode tab 2902. The first electrode tab 2901 has a lower end pin 29011 at a lower portion and a first connecting tab 29012 pre-bent approximately 90 degrees at an upper portion. The lower portion of the second electrode tab 2902 is provided with a lower end pin 29021 and the upper end is provided with a second connecting tab 29022 pre-bent by about 90 degrees. The first connecting tab 29012 and the second connecting tab 29022 are vertically opposite each other with the ends abutting together in a normally closed relationship. The pressing spring 2903 may be a conductive metal material or other material with elastic restoring force. The pressing spring 2903 includes a mounting base 29031 and a spring arm 29032, and the spring arm 29032 can be elastically deformed under the action of an external force, so as to push the button 2904 to move downwards. The downward movement of the button 2904 pushes the first connection tab 29012 of the first electrode tab 2901 to elastically deform downward, thereby bringing the lower portion of the second connection tab 29012 and the upper portion of the second connection tab 29022 out of contact.

As further shown in fig. 9, after the normally closed remote signaling device 290 is installed in the inner housing of the remote signaling device, the sliding plate 280, which is installed in place and welded, does not physically interfere with the spring arms 29032 of the push spring 2903, so that the push button 2904 in the initial position does not cause the lower portion of the first connecting tab 29012 and the upper portion of the second connecting tab 29022 to come out of contact. When the trip occurs, the sliding plate 280 moves leftwards under the action of the spring force, and the lower portion of the sliding plate 280 presses the latch arms 29032 of the pressing spring plates 2903 downwards, so that the latch arms 29032 of the pressing spring plates 2903 push the keys 2904 downwards. The downward movement button 2904 pushes the first connecting piece 29012 of the first electrode piece 2902 to elastically deform downward, so that the two electrode pieces are separated from contact, and the normally closed state of the remote signaling alarm device 290 is released.

Fig. 10 shows an assembly relationship diagram of the second current bar 150 and the varistor element 120 in the surge protection device 100 in accordance with a further embodiment of the present application. Fig. 11 shows a schematic diagram of another view of second current bar 150 in surge protection device 100 according to a further embodiment of the present application.

The second current bar 150 is configured to be in assembled relationship with the side extraction electrode 1202 of the piezoresistive element 120. Specifically, one end of the second current strip 150 forms the pin 1501 of the surge protection device 100, and the other end forms the spring clip structure 1502, and the spring clip structure 1502 can receive and fix the side extraction electrode 1202 of the varistor element 120, so that no welding process is required between the second current strip 150 and the side extraction electrode 1202.

It should be understood that implementations of the present application are intended to encompass a surge protector for delivery having an outer housing and the aforementioned components including an inner housing, a sliding plate and a remote signaling alarm device. For example, fig. 12A shows a schematic view of a surge protection device 100 and a mating outer housing 200 according to the foregoing embodiment of the present application, and fig. 12B shows a deliverable surge protector 300 formed by assembling the surge protection device 100 and the mating outer housing 200 shown in fig. 12A. It should be appreciated that the remote signaling alarm device in surge protection device 100 may be either normally open or normally closed.

It should be noted that, compared with the prior art, the solution provided by the present application is helpful for improving the yield of the assembly link and reducing the failure risk caused by the assembly defect. Specifically, in the conventional surge protector, a sliding plate is usually assembled in the production and assembly process, then a trip welding spot is welded, in this process, the sliding plate is easily scalded by a welding tool, and in addition, a soldering flux may be adhered to the sliding plate. In the proposal provided by the application, the sliding plate is installed at one side of the tripping welding point, and the technical problems can not exist.

The application uses specific words to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.

In the context of the present application, the words "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly indicates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

Similarly, it should be noted that in order to simplify the description of the present disclosure and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are required by the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the scope of embodiments of the present application.

Claims (22)

1. A surge protection device, comprising:

an inner housing (110);

a sliding plate (180) for mounting in the inner housing and sliding between a first position and a second position; and

a remote signaling alarm device (190, 290) comprising a plastic housing, a first electrode pad, a second electrode pad and a key mounted in the plastic housing,

wherein the key is pressed to move downward when the slide plate is located at one of the first position and the second position, thereby causing the first electrode sheet to be elastically deformed, and the key does not cause the first electrode sheet to be elastically deformed when the slide plate is located at the other of the first position and the second position.

2. The surge protection device of claim 1, wherein the first electrode pad and the second electrode pad in the remote signaling device are set to a normally open state, and the first electrode pad and the second electrode pad are turned on each other when the first electrode pad is elastically deformed by the pressing action of the key.

3. The surge protection device of claim 1, wherein the first electrode pad and the second electrode pad in the remote signaling device are set to a normally closed state, and are disconnected from each other when the first electrode pad is elastically deformed by the pressing action of the key.

4. The surge protection device of claim 1, wherein the remote signaling alarm device further comprises a pressing spring, one end of the pressing spring is installed in the plastic housing, and a spring arm at the other end of the pressing spring can press the key after being deformed under pressure.

5. The surge protection device of claim 1, wherein the first position is a position where the sliding plate is when a trip pad of the surge protection device is not tripped open, and the second position is a position where the sliding plate is reached after the spring pulls the sliding plate when the trip pad of the surge protection device has been tripped open.

6. The surge protection device of claim 4 wherein the sliding plate is provided with a bottom remote signaling manipulation structure, the bottom remote signaling manipulation structure comprising a dome briquetting.

7. The surge protection device of claim 6 wherein said bottom remote signaling handling structure further comprises a floor structure (1821) recessed from a bottom surface of the sliding plate, and a gradually rising ramp structure (1822) located on one side of said floor structure.

8. The surge protection device of claim 7 wherein said sliding plate further comprises a side shield (1823) coupled to said base plate structure and said ramp structure.

9. The surge protection device of claim 6 wherein when the sliding plate contacts the pressing dome of the remote signaling alarm device via the dome pressing block, the pressing dome deforms and presses the button downward to a first position, such that the first electrode pad is deformed under pressure and contacts the second electrode pad.

10. The surge protection device of claim 9 wherein said push button does not push said button when said slide plate does not contact said push button of said remote signaling alarm device via said button press block structure.

11. The surge protection device of claim 10 wherein,

the surge protection device further includes a trip weld that, when unbuckled, prevents movement of the sliding plate in the inner housing,

when the tripping welding spot is not tripped and disconnected, the spring plate pressing block of the sliding plate contacts with the pressing spring plate of the remote signaling alarm device,

when the tripping welding point is tripped and disconnected, the spring plate pressing block of the sliding plate is separated from contact with the pressing spring plate of the remote signaling alarm device.

12. The surge protection device of claim 10 wherein,

the surge protection device further includes a trip weld that, when unbuckled, prevents movement of the sliding plate in the inner housing,

when the tripping welding spot is not tripped and disconnected, the spring plate pressing block of the sliding plate is not contacted with the pressing spring plate of the remote signaling alarm device,

when the tripping welding point is tripped and disconnected, the spring plate pressing block of the sliding plate is contacted with the pressing spring plate of the remote signaling alarm device.

13. The surge protection device of claim 1 wherein said plastic housing of said remote signaling device is assembled from a plurality of components.

14. The surge protection device of claim 13 wherein said plastic housing of said remote signaling device is assembled from an upper housing and a lower housing.

15. The surge protection device of claim 1 wherein,

the first electrode sheet is longer than the second electrode sheet;

the lower part of the first electrode plate is provided with a lower end pin, and the upper part of the first electrode plate is provided with a first connecting sheet which is bent in advance;

the lower part of the second electrode plate is provided with a lower end pin, and the upper end of the second electrode plate is provided with a second connecting sheet which is bent in advance.

16. The surge protection device of claim 15 wherein in the molded case, the first connecting tab and the second connecting tab are spaced apart from each other by a distance and vertically opposite each other.

17. The surge protection device of claim 15 wherein a raised contact area is provided on at least one of the first connection tab and the second connection tab to facilitate electrical contact between the first connection tab and the second connection tab.

18. The surge protection device of claim 17 wherein the raised contact areas are raised points for making point contacts or raised strips for making line contacts.

19. The surge protection device of claim 1 further comprising a first current bar (140) and a piezoresistive element (120) mounted on a side of the inner housing opposite the sliding plate, a front electrode (1201) on the piezoresistive element forming an electrical connection through a window (1105) on the inner housing and an extension electrode (1402) of the first current bar (140).

20. The surge protection device of claim 1 or 19, further comprising a second current bar (150) and a piezoresistive element (120), one end of the second current bar forming a pin of the surge protection device, the other end forming a spring clip structure (1502) for receiving and securing a side extraction electrode of the piezoresistive element.

21. The surge protection device of claim 1 further comprising a spring for pulling a sliding plate, one end of the spring being secured to the inner housing and the other end being secured to the sliding plate.

22. A surge protector comprising:

an outer shell, and

the surge protection device of any one of claims 1-21.