Fuse and indicator thereof

Abstract

The utility model relates to the field of switch device, concretely relates to a fuse and its indicator. The indicator of fuse, including indicating part, elastic part, limiting piece and fuse, limiting piece is the hook, it includes hook connecting portion and hook hook portion, and the hook hook portion hooks on the fuse, the elastic part is the elastic sheet, and it includes elastic sheet connecting portion and the elastic sheet energy storage structure for energy storage, and the elastic sheet connecting portion, hook connecting portion injection moulded integral in indicating part. Fuse, including fuse shell, first fuse static contact and second fuse static contact, at least one melt, indicator. The utility model discloses a fuse and its indicator, and the elastic sheet, hook injection moulded in indicating part together, and the simple structure reduces production procedure, and need not assemble again, and the material cost and assembly cost are reduced, and the elastic sheet, hook and indicating part injection moulded into an organic whole, and through the hook hook portion hooks on the fuse, and the assembly difficulty is low, and the installation is more flexible, simple, and the indicator is widely used.

Description

Technical Field

[0001] This utility model relates to the field of switching electrical appliances, specifically to a fuse and its indicator. Background Technology

[0002] The fuse indicator is an important component of the fuse. Its core function is to visually indicate whether the fusible element (fuse wire) inside the fuse has melted. This is crucial for quickly determining the location of the fault, replacing the fuse in a timely manner, and ensuring the safe operation of the electrical system.

[0003] The indicators of existing fuses have the following drawbacks: 1. They have a complex structure and high cost; 2. The internal components of the indicator need to be assembled and fitted together, which makes it difficult to assemble with the fuse. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one defect of the prior art and provide a fuse and its indicator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The indicator of the fuse includes an indicator, an elastic element, a limiting element, and a fuse wire. The indicator is movable and can move between an initial position and an indicated position. The elastic element is connected to the indicator, and the limiting element is connected between the fuse wire and the indicator. When the fuse wire is not blown, the limiting element restricts the indicator, causing the indicator to remain in the initial position against the force of the elastic element. When the fuse wire blows, the elastic element releases energy, driving the indicator to move from the initial position to the indicated position. The limiting element is a hook, which includes a hook connecting part and a hook hook part, the hook hook part hooking onto the fuse wire. The elastic element is a spring, which includes a spring connecting part and a spring energy storage structure for energy storage. The spring connecting part and the hook connecting part are injection molded integrally into the indicator.

[0007] Optionally, the spring contact part is an annular plate structure, and the center line of the spring contact part coincides with or is parallel to the center line of the indicator.

[0008] Optionally, the spring-loaded energy storage structure includes multiple elastic energy storage units, which are respectively connected to the spring-loaded connecting unit and arranged around the center line of the spring-loaded connecting unit.

[0009] Optionally, the spring is a first spring, which includes a first annular piece serving as the spring connecting portion and a plurality of first elastic feet serving as the elastic energy storage portion, and the first annular piece has a first spring through hole;

[0010] Each first elastic leg includes a first elastic leg segment 1, a first elastic leg segment 2, and a first elastic leg segment 3, which are bent and connected in sequence. The first elastic leg segment 1 is connected to the outer side of the first annular piece and is flush with the first annular piece. The first elastic leg segment 2 is inclined away from the center line of the first annular piece, and the first elastic leg segment 2 is bent away from the center line of the first annular piece to form the first elastic leg segment 3. The first elastic leg segment 3 is perpendicular to the center line of the first annular piece.

[0011] Optionally, the spring is a second spring, which includes a second annular piece serving as the spring connecting portion and a plurality of second elastic feet serving as the elastic energy storage portion, and the second annular piece has a second spring through hole;

[0012] Each second elastic leg includes a second elastic leg segment 1, a second elastic leg segment 2, and a second elastic leg segment 3, which are bent and connected in sequence. The second elastic leg segment 1 is connected to the outer side of the second annular piece and is flush with the second annular piece. The second elastic leg segment 2 is inclined towards the center line of the second annular piece and is bent towards the center line of the second annular piece to form the second elastic leg segment 3. The second elastic leg segment 3 is perpendicular to the center line of the second annular piece.

[0013] Optionally, the spring is a third spring, which includes a third annular piece serving as the spring connecting part and a plurality of third elastic feet serving as the elastic energy storage part, and the third annular piece has a third spring through hole;

[0014] Each third elastic foot includes a third elastic foot segment, which is a bent structure with a notch facing away from the center line of the third annular piece. One end of the third elastic foot segment is bent and connected to the inner side of the third annular piece, and the other end is bent away from the center line of the third annular piece to form a third elastic foot segment two. The third elastic foot segment two is perpendicular to the center line of the third annular piece.

[0015] Optionally, the spring is a fourth spring, which includes a fourth annular piece as a connecting part of the spring, a plurality of fourth elastic feet as elastic energy storage parts, and a connecting annular piece arranged parallel to and spaced apart from the fourth annular piece. The fourth annular piece has a fourth spring through hole.

[0016] The fourth elastic foot is a bent structure with a notch facing the center line of the fourth annular piece. One end of the fourth elastic foot is bent and connected to the outer side of the fourth annular piece, and the other end is bent and connected to the outer side of the connecting annular piece. Multiple fourth elastic feet are respectively connected to the connecting annular pieces to form the spring energy storage structure.

[0017] Optionally, the spring is a fifth spring, which includes a fifth annular piece serving as the spring connecting part and a plurality of fifth elastic feet serving as the elastic energy storage part, and the fifth annular piece has a fifth spring through hole;

[0018] Each fifth elastic foot includes a fifth elastic foot segment, which is a bent structure with a notch facing the center line of the fifth annular piece. One end of the fifth elastic foot segment is bent and connected to the outer side of the fifth annular piece, and the other end is bent away from the center line of the fifth annular piece to form a fifth elastic foot segment two. The fifth elastic foot segment two is perpendicular to the center line of the fifth annular piece.

[0019] Optionally, the indicator includes an indicator body and an indicator piece, the indicator piece being stacked on the indicator body, and an indicator boss being raised on the surface of the indicator body opposite to the indicator piece, the indicator boss having at least one annular groove.

[0020] Optionally, the hook includes a hook middle section, which is arranged to coincide with or parallel to the center line of the indicator. One end of the hook middle section is bent to form the hook hook portion, and the other end of the hook middle section is bent to form the hook connecting portion.

[0021] A fuse includes a fuse housing, a first fuse stationary contact and a second fuse stationary contact respectively disposed at both ends of the fuse housing, at least one fusible element disposed within the fuse housing and connected in series between the first fuse stationary contact and the second fuse stationary contact, and further includes an indicator of the fuse as described in any one of the claims, wherein the fuse wire of the indicator is disposed within the fuse housing and connected in series between the first fuse stationary contact and the second fuse stationary contact.

[0022] Optionally, the fuse housing has a fuse housing groove on the outside of the fuse housing and a fuse housing through hole connecting the fuse housing groove and the interior of the fuse housing; one end of the hook of the indicator has a hook portion located inside the fuse housing, and the other end of the hook has a hook connection portion extending from the fuse housing through hole into the fuse housing groove outside the fuse housing; the indicator element of the indicator is movably disposed in the fuse housing groove; the spring of the indicator is disposed in the fuse housing groove, and its spring energy storage structure abuts against the bottom wall of the fuse housing groove.

[0023] The present invention relates to a fuse and its indicator, in which the spring and hook are injection molded together in the indicator, resulting in a simple structure, reduced production steps, and no need for further assembly, thus reducing material and assembly costs. Moreover, the spring, hook, and indicator are injection molded as a whole and hooked onto the fuse wire by the hook, making assembly easy. The fuse wire of the indicator, along with the integrated spring, hook, and indicator, can be assembled in the fuse in separate modules, making installation more flexible and simple. The indicator has a wide range of applications and is more suitable for the use scenarios where contactors have built-in fuses.

[0024] In addition, the hook connection part used for injection molding with the indicator is a bent structure, which makes the hook and indicator more firmly connected as a whole.

[0025] In addition, the spring connecting part used for injection molding with the indicator is a ring-shaped plate structure, which makes the spring and the indicator more firmly connected as a whole.

[0026] In addition, the spring energy storage structure of the spring is formed by multiple elastic energy storage parts arranged around it. The structure is simple and makes it easy for each of the multiple elastic energy storage parts to compress and store energy to jointly drive the indicator to pop out, making the indicator more reliable. Attached Figure Description

[0027] Figure 1 This is an exploded view of the fuse of this utility model;

[0028] Figure 2 This is an assembly drawing of the fuse of this utility model;

[0029] Figure 3 This is an assembly drawing of the indicator according to the first embodiment of this utility model;

[0030] Figure 4 This is an exploded view of the indicator according to the first embodiment of this utility model;

[0031] Figure 5 This is an exploded view of the indicator according to the second embodiment of this utility model;

[0032] Figure 6 This is an exploded view of the indicator according to the third embodiment of this utility model.

[0033] Figure 7 This is an exploded view of the indicator according to the fourth embodiment of this utility model.

[0034] Figure 8 This is an exploded view of the indicator according to the fifth embodiment of this utility model.

[0035] Fuse housing 110; fuse base 111; fuse housing groove 1111; fuse housing through hole 1112; fuse cover plate 112; first fuse stationary contact 120; second fuse stationary contact 130; fusible element 140;

[0036] Indicator 200; Indicator element 210; Indicator element body 211; Indicator plate 212; Indicator element boss 213; Annular groove 214;

[0037] Hook 220; Hook hook portion 221; Hook middle section 222; Hook connecting part 223;

[0038] 230 fuse;

[0039] First spring piece 240; First annular piece 241; First spring piece through hole 2411; First elastic foot 242; First elastic foot segment 1 2421; First elastic foot segment 2422; First elastic foot segment 3 2423;

[0040] Second spring piece 250; second annular piece 251; second spring piece through hole 2511; second elastic foot 252; first section of second elastic foot 2521; second section of second elastic foot 2522; third section of second elastic foot 2523;

[0041] Third spring 260; Third annular piece 261; Third spring through hole 2611; Third elastic foot 262; Third elastic foot first section 2621; Third elastic foot second section 2622;

[0042] Fourth spring piece 270; Fourth annular piece 271; Fourth spring piece through hole 2711; Fourth elastic foot 272; Connecting annular piece 273;

[0043] Fifth spring 280; Fifth annular piece 281; Fifth spring through hole 2811; Fifth elastic foot 282; Fifth elastic foot first section 2821; Fifth elastic foot second section 2822. Detailed Implementation

[0044] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the fuse and its indicator of this utility model. The fuse and its indicator of this utility model are not limited to the descriptions in the following embodiments.

[0045] like Figure 1-2As shown, the fuse of this embodiment includes a fuse housing 110, a first fuse stationary contact 120 and a second fuse stationary contact 130 respectively disposed at both ends of the fuse housing 110, and at least one fusible element 140 respectively disposed inside the fuse housing 110 and connected in series between the first fuse stationary contact 120 and the second fuse stationary contact 130. The fuse housing 110 includes a fuse base 111 made of ceramic and a fuse cover plate 112 made of metal (e.g., iron). The fuse cover plate 112 is fitted onto the fuse base 111, and the fuse base 111 and the fuse cover plate 112 can be fixedly connected by means of screws or the like. One end of the first fuse stationary contact 120 and the second fuse stationary contact 130 extends from both ends of the fuse base 111 of the fuse housing 110 to the outside of the fuse housing 110 for external connection.

[0046] The fuse in this embodiment also includes a fuse indicator 200. The fuse indicator 200 includes an indicator 210, an elastic element, a limiting element, and a fuse wire 230. The fuse wire 230 is disposed within the fuse housing 110 and connected in series between the first fuse stationary contact 120 and the second fuse stationary contact 130. The indicator 210 is movably disposed, capable of moving between an initial position and an indicated position. The elastic element is connected to the indicator 210, and the limiting element is connected between the fuse wire 230 and the indicator 210. When the fuse wire 230 is not blown, the tension of the fuse wire 230 constrains the limiting element, causing the limiting element to restrict the indicator 210, thus keeping the indicator 210 in its initial position against the force of the elastic element. When the fuse wire 230 blows due to overcurrent or a short circuit, the fuse wire 230 loses its tension and can no longer constrain the limiting element, thereby releasing energy from the elastic element and driving the indicator 210 to move from the initial position to the indicated position. It should be noted that the resistance of fuse 230 is greater than that of fuse element 140. Under normal conditions, almost no current flows through fuse 230. When there is an overcurrent or short circuit, fuse element 140 will melt first, and then the current will flow through fuse 230, causing fuse 230 to melt.

[0047] Specifically, the limiting member is a hook 220, which includes a hook connecting part 223 and a hook hook part 221. The hook 220 is connected to the fuse 230 by hooking the hook hook part 221 onto the fuse 230. The elastic member is a spring sheet, which includes a spring sheet connecting part and a spring sheet energy storage structure for energy storage. The spring sheet connecting part and the hook connecting part 223 are injection molded integrally into the indicator 210.

[0048] In this embodiment, the fuse and its indicator are injection molded together with the spring and hook 220 into the indicator 210, which has a simple structure, reduces production steps, eliminates the need for further assembly, and reduces material and assembly costs. Moreover, the spring, hook 220 and indicator 210 are injection molded as a whole and hooked onto the fuse 230 by the hook part 221, which makes assembly easy. The fuse 230 of the indicator 200, together with the integrated spring, hook 220 and indicator 210, can be assembled in the fuse in separate modules, making installation more flexible and simple. The indicator 200 has a wide range of applications and is more suitable for the application scenarios of contactors with built-in fuses.

[0049] Specifically, the fuse housing 110 is provided with a fuse housing groove 1111 on the outside of the fuse housing 110 and a fuse housing through hole 1112 connecting the fuse housing groove 1111 and the interior of the fuse housing 110; one end of the hook 220 of the indicator 200, which has a hook portion 221, is located inside the fuse housing 110, and the other end of the hook 220, which has a hook connection portion 223, extends from the fuse housing through hole 1112 into the fuse housing groove 1111 outside the fuse housing 110; the indicator element 210 of the indicator 200 is movably disposed in the fuse housing groove 1111; the spring of the indicator 200 is disposed in the fuse housing groove 1111, and its spring energy storage structure abuts against the bottom wall of the fuse housing groove 1111.

[0050] like Figure 3-4 As shown, the indicator 210 includes an indicator body 211 and an indicator piece 212. The indicator piece 212 is stacked on the indicator body 211, and its size is larger than that of the indicator body 211. An indicator boss 213 protrudes from the surface of the indicator body 211 opposite to the indicator piece 212, and the indicator boss 213 has at least one annular groove 214. The annular groove 214 on the indicator boss 213 increases the creepage distance. The indicator body 211 is preferably cylindrical, but can also be square or other shaped cylindrical structures; the indicator piece 212 is preferably circular, but can also be square or other shaped sheet structures. The indicator piece 212 may be provided with an indicator mark, which can be one or more combinations of color, text, and graphics.

[0051] In this embodiment, when the indicator 210 is in the initial position, the indicator 210 is hidden in the fuse housing groove 1111, that is, the indicator piece 212 is recessed in or flush with the side of the fuse housing 110 where the fuse housing groove 1111 is provided, for indicating that the fuse 230 is in an unblessed state; when the spring energy storage structure of the spring releases energy to drive the indicator 210 to move from the initial position to the indicated position, the indicator 210 pops out from the fuse housing groove 1111, that is, the indicator piece 212 protrudes from the side of the fuse housing 110 where the fuse housing groove 1111 is provided, for indicating that the fuse 230 is in a blew state.

[0052] like Figure 3-4 As shown, the hook 220 includes a hook middle section 222, which is aligned with or parallel to the center line of the indicator 210. One end of the hook middle section 222 is bent to form the hook portion 221, and the other end is bent to form the hook connecting portion 223. The hook connecting portion 223 is preferably a U-shaped, L-shaped, arc-shaped, or other shaped bent structure. The bent structure of the hook connecting portion 223, which is used for injection molding with the indicator 210, makes the integral connection between the hook 220 and the indicator 210 more secure.

[0053] like Figure 3-4 As shown, the spring contact part is an annular sheet structure, and its center line coincides with or is parallel to the center line of the indicator 210. The annular sheet structure of the spring contact part used for injection molding with the indicator 210 makes the integral connection between the spring contact and the indicator 210 more secure. The spring contact part is preferably a circular annular sheet, but it can also be a square annular sheet or other annular sheet structures.

[0054] Furthermore, the spring-loaded energy storage structure includes multiple elastic energy storage units, which are respectively connected to the spring-loaded connecting unit and arranged around the center line of the spring-loaded connecting unit. The spring-loaded energy storage structure is formed by multiple elastic energy storage units arranged around each other, which is simple in structure and facilitates the compression and storage of energy by each elastic energy storage unit to jointly drive the indicator 210 to pop out, making the indication of the indicator 210 more reliable.

[0055] like Figure 3-4 As shown, this is a first embodiment of the indicator 200. In this embodiment, the spring is a first spring 240. The first spring 240 includes a first annular piece 241 as the spring connecting part and a plurality of first elastic feet 242 as the elastic energy storage part. That is, the spring energy storage structure of this embodiment is formed by a plurality of first elastic feet 242 surrounding the center line of the first annular piece 241. The first annular piece 241 has a first spring through hole 2411.

[0056] Each first elastic leg 242 includes a first elastic leg segment 2421, a first elastic leg segment 2422, and a first elastic leg segment 2423, which are bent and connected in sequence. The first elastic leg segment 2421 is connected to the outer side of the first annular piece 241 and is flush with the first annular piece 241. The first elastic leg segment 2422 is inclined away from the center line of the first annular piece 241, and is bent away from the center line of the first annular piece 241 to form the first elastic leg segment 2423. The first elastic leg segment 2423 is perpendicular to the center line of the first annular piece 241. In this embodiment, the first elastic leg segment 2423 of each first elastic leg 242 in the spring energy storage structure abuts against the bottom wall of the fuse housing groove 1111. In this embodiment, the first spring piece 240 has an outward hook structure for the first elastic leg 242, which is simple in structure, easy to form, and extends outward when compressed, making it easier to compress and store energy.

[0057] In this embodiment, the outer diameter of the first annular piece 241 is smaller than the outer diameter of the indicator body 211, and the end of the first elastic foot segment 2421 connected to the first annular piece 241 is injection molded together with the first annular piece 241 into the indicator body 211.

[0058] like Figure 5 As shown, this is a second embodiment of the indicator 200. In this embodiment, the spring is a second spring 250. The second spring 250 includes a second annular piece 251 as the spring connecting part and a plurality of second elastic feet 252 as the elastic energy storage part. That is, the spring energy storage structure of this embodiment is formed by a plurality of second elastic feet 252 surrounding the center line of the second annular piece 251. The second annular piece 251 has a second spring through hole 2511.

[0059] Each second elastic leg 252 includes a second elastic leg segment 2521, a second elastic leg segment 2522, and a second elastic leg segment 2523, which are bent and connected in sequence. The second elastic leg segment 2521 is connected to the outer side of the second annular piece 251 and is flush with the second annular piece 251. The second elastic leg segment 2522 is inclined towards the center line of the second annular piece 251, and is bent towards the center line of the second annular piece 251 to form the second elastic leg segment 2523, which is perpendicular to the center line of the second annular piece 251. In this embodiment, the second elastic leg segment 2523 of each second elastic leg 252 in the spring energy storage structure abuts against the bottom wall of the fuse housing groove 1111. In this embodiment, the second elastic leg 252 of the second spring 250 has an inward hook structure, which extends inward when compressed, saving space.

[0060] In this embodiment, the outer diameter of the second annular piece 251 is smaller than the outer diameter of the indicator body 211, and one end of the second elastic foot segment 2521 connected to the second annular piece 251 is injection molded together with the second annular piece 251 into the indicator body 211.

[0061] like Figure 6 As shown, this is a third embodiment of the indicator 200. In this embodiment, the spring is a third spring 260. The third spring 260 includes a third annular piece 261 as the spring connecting part and a plurality of third elastic feet 262 as the elastic energy storage part. That is, the spring energy storage structure of this embodiment is formed by a plurality of third elastic feet 262 surrounding the center line of the third annular piece 261. The third annular piece 261 has a third spring through hole 2611.

[0062] Each third elastic leg 262 includes a third elastic leg segment 2621, which is a bent structure with a notch facing away from the center line of the third annular piece 261. One end of the third elastic leg segment 2621 is bent and connected to the inner side of the third annular piece 261, and the other end is bent away from the center line of the third annular piece 261 to form a third elastic leg segment 2622, which is perpendicular to the center line of the third annular piece 261. In this embodiment, the third elastic leg segment 2622 of each third elastic leg 262 in the spring energy storage structure abuts against the bottom wall of the fuse housing groove 1111. The third elastic leg segment 2621 is preferably a curved, U-shaped, V-shaped or other shaped bent structure. In this embodiment, the third elastic leg 262 of the third spring 260 extends from the inner hole of the third annular piece 261, which is simple in structure and easy to form.

[0063] In this embodiment, the third annular piece 261 is injection molded into the indicator piece 212.

[0064] like Figure 7 As shown, this is the fourth embodiment of the indicator 200. In this embodiment, the spring is a fourth spring 270. The fourth spring 270 includes a fourth annular piece 271 as the spring connecting part, a plurality of fourth elastic feet 272 as the elastic energy storage part, and a connecting annular piece 273 arranged parallel to and spaced apart from the fourth annular piece 271. That is, the plurality of fourth elastic feet 272 are arranged around the center line of the fourth annular piece 271. The fourth annular piece 271 has a fourth spring through hole 2711.

[0065] The fourth elastic foot 272 is a bent structure with a notch facing the center line of the fourth annular piece 271. One end of the fourth elastic foot 272 is bent and connected to the outer side of the fourth annular piece 271, and the other end is bent and connected to the outer side of the connecting annular piece 273. Multiple fourth elastic feet 272 are respectively connected to the connecting annular piece 273 to form the spring-loaded energy storage structure of this embodiment. The connecting annular piece 273 of the spring-loaded energy storage structure of this embodiment abuts against the bottom wall of the fuse housing groove 1111. The fourth elastic foot 272 is preferably a curved, U-shaped, V-shaped, or other shaped bent structure. The fourth spring piece 270 of this embodiment is formed by two layers of annular pieces and a compressible energy-storing fourth elastic foot 272 located in the middle, which improves the synchronization of energy storage compression among the various fourth elastic feet 272.

[0066] In this embodiment, the fourth annular piece 271 is injection molded into the indicator piece 212.

[0067] like Figure 8 As shown, this is the fifth embodiment of the indicator 200. In this embodiment, the spring is the fifth spring 280. The fifth spring 280 includes a fifth annular piece 281 as the spring connecting part and a plurality of fifth elastic feet 282 as the elastic energy storage part. That is, the spring energy storage structure of this embodiment is formed by a plurality of fifth elastic feet 282 surrounding the center line of the fifth annular piece 281. The fifth annular piece 281 has a fifth spring through hole 2811.

[0068] Each fifth elastic leg 282 includes a fifth elastic leg segment 2821, which is a bent structure with a notch facing the center line of the fifth annular piece 281. One end of the fifth elastic leg segment 2821 is bent and connected to the outer side of the fifth annular piece 281, and the other end is bent away from the center line of the fifth annular piece 281 to form a fifth elastic leg second segment 2822, which is perpendicular to the center line of the fifth annular piece 281. In this embodiment, the fifth elastic leg second segment 2822 of each fifth elastic leg 282 in the spring energy storage structure abuts against the bottom wall of the fuse housing groove 1111. The fifth elastic leg segment 2821 is preferably a curved, U-shaped, V-shaped or other shaped bent structure. In this embodiment, the fifth elastic leg 282 of the fifth spring 280 has an inward hook structure for the fifth elastic leg segment 2821, which is bent outward to form the fifth elastic leg second segment 2822, saving space and allowing it to extend outward during compression, making it easier to compress and store energy.

[0069] In this embodiment, the fifth annular piece 281 is injection molded into the indicator piece 212.

[0070] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0071] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A fuse indicator, comprising an indicator (210), an elastic element, a limiting element, and a fuse wire (230), wherein the indicator (210) is movably disposed and capable of moving between an initial position and an indicated position, the elastic element is connected to the indicator (210), and the limiting element is connected between the fuse wire (230) and the indicator (210); when the fuse wire (230) is not blown, the limiting element restricts the indicator (210), causing the indicator (210) to remain in the initial position against the force of the elastic element; when the fuse wire (230) blows, the elastic element releases energy and drives the indicator (210) to move from the initial position to the indicated position; characterized in that: The limiting component is a hook (220), which includes a hook connecting part (223) and a hook hook part (221), the hook hook part (221) hooking onto the fuse (230); the elastic component is a spring sheet, which includes a spring sheet connecting part and a spring sheet energy storage structure for energy storage, the spring sheet connecting part and the hook connecting part (223) being injection molded integrally into the indicator (210).

2. The fuse indicator according to claim 1, characterized in that: The spring contact part is a ring-shaped structure, and the center line of the spring contact part coincides with or is parallel to the center line of the indicator (210).

3. The fuse indicator according to claim 1 or 2, characterized in that: The spring-loaded energy storage structure includes multiple elastic energy storage units, which are connected to the spring-loaded connecting units and arranged around the center line of the spring-loaded connecting units.

4. The fuse indicator according to claim 3, characterized in that: The spring is a first spring (240), which includes a first annular piece (241) serving as the spring connecting part and a plurality of first elastic feet (242) serving as the elastic energy storage part. The first annular piece (241) has a first spring through hole (2411). Each first elastic foot (242) includes a first elastic foot segment 1 (2421), a first elastic foot segment 2 (2422), and a first elastic foot segment 3 (2423) that are bent and connected in sequence. The first elastic foot segment 1 (2421) is connected to the outside of the first annular piece (241) and is flush with the first annular piece (241). The first elastic foot segment 2 (2422) is inclined away from the center line of the first annular piece (241) and is bent away from the center line of the first annular piece (241) to form the first elastic foot segment 3 (2423). The first elastic foot segment 3 (2423) is perpendicular to the center line of the first annular piece (241).

5. The fuse indicator according to claim 3, characterized in that: The spring is a second spring (250), which includes a second annular piece (251) as the spring connecting part and a plurality of second elastic feet (252) as the elastic energy storage part. The second annular piece (251) has a second spring through hole (2511). Each second elastic foot (252) includes a second elastic foot segment 1 (2521), a second elastic foot segment 2 (2522), and a second elastic foot segment 3 (2523) that are bent and connected in sequence. The second elastic foot segment 1 (2521) is connected to the outside of the second annular piece (251) and is flush with the second annular piece (251). The second elastic foot segment 2 (2522) is inclined towards the center line of the second annular piece (251), and the second elastic foot segment 2 (2522) is bent towards the center line of the second annular piece (251) to form the second elastic foot segment 3 (2523). The second elastic foot segment 3 (2523) is perpendicular to the center line of the second annular piece (251).

6. The fuse indicator according to claim 3, characterized in that: The spring is a third spring (260), which includes a third annular piece (261) as the spring connecting part and a plurality of third elastic feet (262) as the elastic energy storage part. The third annular piece (261) has a third spring through hole (2611). Each third elastic foot (262) includes a third elastic foot section (2621), which is a bent structure with a notch facing away from the center line of the third annular piece (261). One end of the third elastic foot section (2621) is bent and connected to the inner side of the third annular piece (261), and the other end is bent away from the center line of the third annular piece (261) to form a third elastic foot section (2622). The third elastic foot section (2622) is perpendicular to the center line of the third annular piece (261).

7. The fuse indicator according to claim 3, characterized in that: The spring is a fourth spring (270), which includes a fourth annular piece (271) as the spring connecting part, a plurality of fourth elastic feet (272) as the elastic energy storage part, and a connecting annular piece (273) arranged parallel to and spaced apart from the fourth annular piece (271). The fourth annular piece (271) has a fourth spring through hole (2711). The fourth elastic foot (272) is a bent structure with a notch facing the center line of the fourth annular piece (271). One end of the fourth elastic foot (272) is bent and connected to the outer side of the fourth annular piece (271), and the other end is bent and connected to the outer side of the connecting annular piece (273). Multiple fourth elastic feet (272) are respectively connected to the connecting annular piece (273) to form the spring energy storage structure.

8. The fuse indicator according to claim 3, characterized in that: The spring is a fifth spring (280), which includes a fifth annular piece (281) as the spring connecting part and a plurality of fifth elastic feet (282) as the elastic energy storage part. The fifth annular piece (281) has a fifth spring through hole (2811). Each fifth elastic foot (282) includes a fifth elastic foot section (2821), which is a bent structure with a notch facing the center line of the fifth annular piece (281). One end of the fifth elastic foot section (2821) is bent and connected to the outer side of the fifth annular piece (281), and the other end is bent away from the center line of the fifth annular piece (281) to form a fifth elastic foot section two (2822). The fifth elastic foot section two (2822) is perpendicular to the center line of the fifth annular piece (281).

9. The fuse indicator according to claim 1, characterized in that: The indicator (210) includes an indicator body (211) and an indicator piece (212). The indicator piece (212) is stacked on the indicator body (211). An indicator boss (213) is raised on the surface of the indicator body (211) opposite to the indicator piece (212). At least one annular groove (214) is provided on the indicator boss (213).

10. The fuse indicator according to claim 1, characterized in that: The hook (220) includes a hook middle section (222), which is arranged to coincide with or parallel to the center line of the indicator (210). One end of the hook middle section (222) is bent to form the hook hook part (221), and the other end of the hook middle section (222) is bent to form the hook connecting part (223).

11. A fuse, comprising a fuse housing (110), a first fuse stationary contact (120) and a second fuse stationary contact (130) respectively disposed at both ends of the fuse housing (110), and at least one fusible element (140) disposed within the fuse housing (110) and connected in series between the first fuse stationary contact (120) and the second fuse stationary contact (130), characterized in that: It also includes an indicator for the fuse as described in any one of claims 1-10, wherein the fuse wire (230) of the indicator (200) is disposed within the fuse housing (110) and connected in series between the first fuse stationary contact (120) and the second fuse stationary contact (130).

12. The fuse according to claim 11, characterized in that: The fuse housing (110) is provided with a fuse housing groove (1111) on the outside of the fuse housing (110) and a fuse housing through hole (1112) connecting the fuse housing groove (1111) and the interior of the fuse housing (110); the hook (220) of the indicator (200) is provided with a hook portion (221) at one end located inside the fuse housing (110), and the hook (220) is provided with a hook connection. The other end of part (223) extends from the fuse housing through hole (1112) into the fuse housing groove (1111) outside the fuse housing (110); the indicator (210) of the indicator (200) is movably disposed in the fuse housing groove (1111); the spring of the indicator (200) is disposed in the fuse housing groove (1111), and its spring energy storage structure abuts against the bottom wall of the fuse housing groove (1111).

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