Mistakenly-mounting prevention structure for fuse

Abstract

The invention provides a mistakenly-mounting prevention structure for a fuse, and relates to the technical field of electrical components, the mistakenly-mounting prevention structure comprises a shell and a firing pin, the shell comprises a lower shell and an upper shell, a fuse assembly is arranged in the lower shell and comprises a clamping piece, and a mounting mechanism is connected with a fusible core body and a mistakenly-mounting prevention assembly. When the end, with the boss, of the fusible core body is inserted into the fusible core bin on the inner side of the mounting frame, firstly, the fusible core body makes contact with the abutting piece, the end, away from the connecting piece, of the abutting piece slides towards the boss and finally abuts against the boss, and at the moment, the fusible core body cannot be mounted due to limitation of the abutting piece; when the end, not provided with the boss, of the fusible core body is inserted into the inner side of the fusible core bin, the fusible core body is in contact with the abutting piece as well, the fusible core body continues to move towards the inner side, finally the abutting piece is extruded by the fusible core body to rotate by nearly 180 degrees, the fusible core body is smoothly placed into the inner side of the fusible core bin, and therefore the fusible core assembly device has the mistaken assembly prevention function; the problem that a fusible core of an existing device is not easy to install correctly is solved.

Description

Technical Field

[0001] This invention belongs to the field of electrical component technology, and more specifically, relates to a fuse anti-misinstallation structure. Background Technology

[0002] A fuse, also known as a circuit breaker, is an electrical component installed in a circuit to ensure its safe operation. A fuse is essentially an overcurrent protector.

[0003] The working principle of a fuse is as follows: when the current exceeds a specified value for a certain period of time, the fuse melts its fusible element due to the heat generated by the fuse itself, thereby breaking the circuit. In power distribution systems, control systems, and electrical equipment, fuses are one of the most widely used protective devices, serving as protectors against short circuits and severe overcurrents. Fuses have an inverse time-delay characteristic, meaning that when the overload current is small, the fusing time is long; when the overload current is large, the fusing time is short. Therefore, within a certain overload current range, when the current returns to normal, the fuse will not melt and can continue to be used. Fuses have various fusing characteristic curves to meet the needs of different types of protected objects. A fuse is connected in series in a circuit. When an overload or short circuit fault occurs in the circuit or electrical equipment, the fuse element melts first, cutting off the power supply and protecting the line or electrical equipment. It belongs to the category of short-circuit protection devices.

[0004] Currently, the GB / T 13539 standard includes a type of circular cap fuse with an impactor, consisting of a fuse holder, fuse core, striker A, striker B, and a terminal block. Under normal conditions, the impactor does not eject when the fuse core is intact. After the fuse blows, the impactor ejects and strikes striker A, which in turn strikes a push rod. The push rod then strikes the output device to complete the fuse blown alarm indication. The problem is that the impactor is only present on one end. If the operator mistakenly installs the end with the impactor backwards, the alarm will not function, posing a significant risk in critical situations. Therefore, it suffers from a complex structure and is difficult to install correctly.

[0005] Therefore, we studied and improved the existing structure and its shortcomings, and provided a fault-prevention structure for fuses. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a fuse anti-misinstallation structure to solve these issues.

[0007] A fuse anti-misinstallation structure includes a housing and a striker. The housing includes a lower housing and an upper housing. A fuse assembly is disposed inside the lower housing. The fuse assembly includes a clamping member. The housing is connected to an installation mechanism. The installation mechanism is connected to a fuse core body and an anti-misinstallation assembly. The anti-misinstallation assembly is fixedly connected to a limit mechanism and a torsion spring. The installation mechanism includes a fuse core frame. The anti-misinstallation assembly includes a baffle. The limit mechanism includes a connecting member.

[0008] Preferably, the inner side of the lower shell is provided with a movable cavity, and the clamping member is disposed in the movable cavity.

[0009] Preferably, a movable shaft is provided between the lower shell and the upper shell.

[0010] Preferably, the core frame is fixedly connected to a rotating shaft sleeve, and the movable shaft connected to the lower shell is rotatably connected to the rotating shaft sleeve.

[0011] Preferably, the two side walls of the core-fusing frame are provided with slots, the two inner side walls of the core-fusing frame near the anti-misalignment assembly are provided with inclined grooves, the core-fusing frame is fixedly connected to the mounting frame, and a core-fusing chamber is formed between the mounting frame and the core-fusing frame.

[0012] Preferably, the core body is located inside the core chamber, and the core body is provided with a boss. One end of the core body with the boss is clamped by a clamping component.

[0013] Preferably, both ends of the baffle are fixedly connected to a locking block, the baffle is fixedly connected to a connecting plate, and the end of the connecting plate away from the baffle is fixedly connected to two connecting seats, with a movable shaft fixedly connected between the two connecting seats.

[0014] Preferably, the two locking blocks are respectively engaged with the two locking slots, the connecting plate is inserted into the inner side of the core frame, and the movable shaft of the connecting seat is rotatably connected to the connecting piece and the torsion spring.

[0015] Preferably, the connector has two through holes, and the connector is rotatably connected to the movable shaft through the two through holes. The connector is fixedly connected to an abutment.

[0016] Preferably, the torsion spring is connected to a stop bar.

[0017] Compared with the prior art, the present invention has the following beneficial effects: In this invention, by providing the present application and by setting a limiting mechanism, when the end of the molten core body with the boss is inserted into the molten core chamber inside the mounting bracket, the molten core body will first come into contact with the abutment. When the abutment is squeezed by the molten core body, it will rotate. At the same time, the end of the abutment away from the connector will slide towards the boss and eventually be abutted by the boss. At this time, the molten core body will be unable to be installed due to the restriction of the abutment. When the end of the molten core body without the boss is inserted into the molten core chamber, it will also come into contact with the abutment. The molten core body continues to move inward until the abutment is squeezed and rotated by the molten core body by nearly 180 degrees, and the molten core body is successfully placed into the molten core chamber. This application has the function of preventing incorrect installation and solves the problem that the molten core of the existing device is not easy to install correctly.

[0018] In this invention, by providing a limiting mechanism and a torsion spring, with the torsion spring connected to a stop bar, both the abutment and the stop bar can participate in preventing the fused core body from being installed incorrectly, thus providing dual protection and giving this application high stability.

[0019] In this invention, by providing a detachable anti-misalignment assembly, when the stop bar of the limiting mechanism or torsion spring is damaged after long-term use, the locking block is disengaged from the locking slot, and the baffle is pulled to pull the locking block and the connecting plate out of the core frame, along with the limiting mechanism and the torsion spring, which facilitates the maintenance of the limiting mechanism and the torsion spring, thus making this application easy to maintain.

[0020] In this invention, by providing a movable cavity, both the mounting mechanism and the fused core body can be rotated into the movable cavity through the rotating shaft sleeve, so that the fused core body can be protected by the shell and is not easily damaged by external factors, thus giving this application a high level of protection.

[0021] In this invention, the anti-misassembly effect can be achieved by providing an anti-misassembly component and a boss. Furthermore, both the anti-misassembly component and the fused core body can be produced separately and finally assembled with the shell, giving this application the advantages of simple structure and easy production. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is an exploded structural diagram of the entire invention; Figure 3 This is a schematic diagram of the overall fused core body structure of the present invention; Figure 4 This is a top view of the overall structure of the invention; Figure 5 This is a top view schematic diagram of the overall structure and installation mechanism of the present invention; Figure 6 This is a three-dimensional structural diagram of the overall installation mechanism of the present invention; Figure 7 This is a three-dimensional structural diagram of the present invention with the top shell removed. Figure 8 This is a schematic diagram of the overall installation mechanism and the exploded structure of the fused core body of the present invention; Figure 9 This is a schematic diagram of the overall installation mechanism and limiting mechanism structure of the present invention. Figure 10 This is a schematic diagram of the overall anti-misassembly assembly and limiting mechanism structure of the present invention; Figure 11 This is a schematic diagram of the overall limiting mechanism structure of the present invention; Figure 12 This is a schematic diagram of the overall mounting mechanism and torsion spring structure of the present invention. Figure 13 This is a schematic diagram of the overall anti-misassembly assembly and torsion spring structure of the present invention; Figure 14 This is a schematic diagram of the overall torsion spring structure of the present invention.

[0023] In the figure, the correspondence between the component names and the attached drawing numbers is as follows: 1. Housing; 2. Mounting mechanism; 3. Fusion core body; 4. Anti-misinstallation component; 5. Limiting mechanism; 6. Torsion spring; 7. Clamping component; 101. Lower housing; 102. Upper housing; 103. Impact pin; 201. Fusion core frame; 202. Slot; 203. Inclined slot; 204. Mounting bracket; 205. Fusion core chamber; 206. Rotary shaft sleeve; 301. Boss; 401. Baffle; 402. Locking block; 403. Connecting plate; 404. Connecting seat; 501. Connecting component; 502. Through hole; 503. Abutment component; 601. Stop bar. Detailed Implementation

[0024] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0025] Example 1: Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 This invention provides a fuse anti-misinstallation structure, including a housing 1 and a striker 103. The housing 1 includes a lower housing 101 and an upper housing 102. A fuse assembly is disposed inside the lower housing 101. The fuse assembly includes a clamping member 7. The housing 1 is connected to an installation mechanism 2. The installation mechanism 2 is connected to a fuse core body 3 and an anti-misinstallation component 4. The anti-misinstallation component 4 is fixedly connected to a limiting mechanism 5 and a torsion spring 6. The installation mechanism 2 includes a fuse core frame 201. The anti-misinstallation component 4 includes a baffle 401. The limiting mechanism 5 includes a connecting member 501.

[0026] The lower shell 101 has an inner cavity with a clamping member 7 disposed therein. The cavity accommodates part of the mounting mechanism 2 and the core melting body 3. A movable shaft is provided between the lower shell 101 and the upper shell 102. A rotating shaft sleeve 206 is fixedly connected to the core melting frame 201. The movable shaft connected to the lower shell 101 is rotatably connected to the rotating shaft sleeve 206. Slots 202 are provided on both side walls of the core melting frame 201. Inclined grooves 203 are provided on both inner side walls of the core melting frame 201 near the anti-misalignment assembly 4. A mounting frame 204 is fixedly connected to the core melting frame 201. A core melting chamber 205 is formed between the mounting frame 204 and the core melting frame 201. The core melting body 3... Located inside the core melting chamber 205, the core melting body 3 is provided with a boss 301. One end of the core melting body 3 with the boss 301 is clamped by a clamping member 7. Both ends of the baffle 401 are fixedly connected with a locking block 402. The baffle 401 is fixedly connected with a connecting plate 403. Two connecting seats 404 are fixedly connected to the end of the connecting plate 403 away from the baffle 401. A movable shaft is fixedly connected between the two connecting seats 404. The two locking blocks 402 are respectively engaged with two locking slots 202. The connecting plate 403 is inserted into the inside of the core melting frame 201. The movable shaft fixedly connected to the connecting seat 404 is rotatably connected to the connecting member 501 and the torsion spring 6.

[0027] Working principle: In this application, when the end of the molten core body 3 with the protrusion 301 is inserted into the molten core chamber 205 inside the mounting bracket 204, the molten core body 3 will first come into contact with the abutment 503. When the abutment 503 is squeezed by the molten core body 3, it will rotate. At the same time, the end of the abutment 503 away from the connector 501 will slide towards the protrusion 301 and eventually be abutted by the protrusion 301. At this time, the molten core body 3 will be unable to be installed due to the restriction of the abutment 503. When the end of the molten core body 3 without the protrusion 301 is inserted into the inside of the molten core chamber 205, it will also come into contact with the abutment 503. The molten core body 3 continues to move inward until the abutment 503 is squeezed and rotated by the molten core body 3 by nearly 180 degrees, and the molten core body 3 is successfully placed into the inside of the molten core chamber 205.

[0028] Example 2: Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14This invention provides a fuse anti-misinstallation structure, including a housing 1 and a striker 103. The housing 1 includes a lower housing 101 and an upper housing 102. A fuse assembly is disposed inside the lower housing 101. The fuse assembly includes a clamping member 7. The housing 1 is connected to an installation mechanism 2. The installation mechanism 2 is connected to a fuse core body 3 and an anti-misinstallation component 4. The anti-misinstallation component 4 is fixedly connected to a limiting mechanism 5 and a torsion spring 6. The installation mechanism 2 includes a fuse core frame 201. The anti-misinstallation component 4 includes a baffle 401. The limiting mechanism 5 includes a connecting member 501.

[0029] The lower shell 101 has an inner cavity, and the clamping member 7 is disposed in the cavity. The cavity is used to accommodate part of the mounting mechanism 2 and the core body 3. A movable shaft is provided between the lower shell 101 and the upper shell 102. The core frame 201 is fixedly connected to a rotating shaft sleeve 206. The movable shaft connected to the lower shell 101 is rotatably connected to the rotating shaft sleeve 206.

[0030] The core-feeding frame 201 has slots 202 on both side walls, and inclined grooves 203 on both inner side walls near the anti-misalignment assembly 4. A mounting frame 204 is fixedly connected to the core-feeding frame 201, forming a core-feeding chamber 205 between the mounting frame 204 and the core-feeding frame 201. The core-feeding body 3 is located inside the core-feeding chamber 205. The core-feeding body 3 has a boss 301, one end of which is clamped by a clamping member 7. Both ends of the baffle 401 are fixedly connected to locking blocks 402, and a connecting plate 403 is fixedly connected to the baffle 401. Two connecting seats 404 are fixedly connected to the end of the connecting plate 403 away from the baffle 401. A movable shaft is fixedly connected between the two connecting seats 404. Two locking blocks 402 are respectively engaged with two locking slots 202. The connecting plate 403 is inserted into the inner side of the core frame 201. The movable shaft fixedly connected to the connecting seat 404 is rotatably connected to the connecting member 501 and the torsion spring 6. The connecting member 501 has two through holes 502. The connecting member 501 is rotatably connected to the movable shaft through the two through holes 502. The connecting member 501 is fixedly connected to the abutment member 503. The torsion spring 6 is connected to the stop rod 601.

[0031] Housing 1: As the outer shell of the entire fuse anti-misinstallation structure, it provides the installation base and protection for the internal components, including the lower shell 101, upper shell 102 and other related components, to ensure the stability and integrity of the overall structure.

[0032] Mounting mechanism 2: used to mount the core body 3. Its core frame 201 provides a placement position for the anti-misinstallation component 4. The mounting frame 204 and the core frame 201 form a core chamber 205 to accommodate the core body 3. The rotating shaft sleeve 206 allows the core frame 201 to rotate around the movable axis of the lower shell 101, which facilitates installation and operation.

[0033] Fuse core body 3: As the core component of the fuse, it is the key bearing part of the circuit protection function. Its boss 301 is used to cooperate with the stop bar 601 in the anti-misinstallation assembly 4 to realize the anti-misinstallation function.

[0034] Anti-misalignment component 4: Prevents the core body 3 from being installed in the wrong direction. The locking block 402 and the locking slot 202 cooperate to fix the anti-misalignment component 4 on the core frame 201. The connecting plate 403 connects the baffle 401 and the connecting seat 404 to ensure the integrity of the structure. The connecting seat 404 provides an installation position for the movable shaft and related rotating parts.

[0035] Limiting mechanism 5: In coordination with anti-misinstallation component 4, it limits the installation of the fused core body 3 through connector 501 and its abutment 503, in conjunction with torsion spring 6 and stop bar 601. Connector 501 is connected to the movable shaft through through hole 502 to ensure smooth limiting action.

[0036] Torsion spring 6: It assists in the implementation of the anti-misinstallation function. The stop bar 601 is squeezed and rotated when the fused core body 3 is inserted, thereby determining whether the installation direction of the fused core body 3 is correct.

[0037] Clamping component 7: clamps one end of the mounting boss 301 of the core body 3, and serves to fix the position of the core body 3 to ensure its stable installation inside the housing 1.

[0038] The lower shell 101 has an internal movable cavity that accommodates the installation mechanism 2 and the core body 3. It is also connected to the movable shaft and the rotating sleeve 206 of the core frame 201 for rotational connection, providing the lower installation space and rotational support for the internal components.

[0039] Upper shell 102: It works with the lower shell 101 to form a complete shell 1, which protects the internal components.

[0040] Card slot 202: Used to cooperate with card block 402 to fix the anti-misalignment assembly 4.

[0041] Inclined groove 203: facilitates the entry of the locking block 402 into the inner side of the core frame 201.

[0042] Mounting frame 204: Together with the core frame 201, it forms the core chamber 205, which is used to place the core body 3.

[0043] Core chamber 205: accommodates the core body 3 and provides it with a precise installation position.

[0044] Rotating sleeve 206: Enables the core frame 201 to rotate around the movable shaft connected to the lower shell 101, ensuring installation flexibility.

[0045] Boss 301: It works in conjunction with the stop bar 601 in the anti-misinstallation component 4. The installation direction of the fused core body 3 is determined by whether the stop bar 601 abuts or allows it to pass, thus achieving anti-misinstallation.

[0046] Baffle 401: It forms the structural basis of the entire anti-misalignment assembly 4.

[0047] Card block 402: engages with card slot 202 to secure the installation position of anti-misinstallation component 4 on the core frame 201.

[0048] Connecting plate 403: Connects baffle 401 and connecting seat 404 to maintain the structural stability of anti-misassembly component 4.

[0049] Connector 404: Provides mounting support points for components such as movable shaft and connector 501, ensuring smooth rotational connection of each component.

[0050] Connector 501: By means of a rotating connection, the limiting operation of the molten core body 3 is completed.

[0051] Through hole 502: Creates structural conditions for the rotational connection between connector 501 and movable shaft, ensuring flexible rotation.

[0052] Contact component 503: assists in limiting the position of the fused core body 3, and improves the limiting mechanism to prevent incorrect installation.

[0053] Stop lever 601: rotates under the pressure of the molten core body 3 to prevent the molten core body 3 from being misinstalled.

[0054] Working principle: In the first step, when the end of the core body 3 with the boss 301 is inserted into the core chamber 205 inside the mounting bracket 204, the core body 3 will first come into contact with the stop bar 601. When the stop bar 601 is squeezed by the core body 3, it will rotate. At the same time, the end of the stop bar 601 away from the torsion spring 6 will slide towards the boss 301 and eventually be blocked by the boss 301. At this time, the core body 3 will be unable to be installed due to the restriction of the stop bar 601. When the end of the core body 3 without the boss 301 is inserted into the core chamber 205, it will also come into contact with the stop bar 601. The core body 3 continues to move inward until the stop bar 601 is squeezed and rotated by the core body 3 by nearly 180 degrees, and the core body 3 is successfully placed into the core chamber 205.

[0055] The second step is to disengage the locking block 402 from the locking slot 202 when the stop bar 601 of the limiting mechanism 5 or the torsion spring 6 is damaged after long-term use. Pull the baffle 401 to pull the locking block 402 and the connecting plate 403 out of the fusion frame 201, and the limiting mechanism 5 and the torsion spring 6 will also be disengaged from the fusion frame 201. This makes it convenient to repair the limiting mechanism 5 and the torsion spring 6.

[0056] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A fuse anti-misassembly structure, comprising a housing (1) and a firing pin (103), wherein the housing (1) comprises a lower housing (101) and an upper housing (102), and a fuse assembly is disposed inside the lower housing (101), the fuse assembly comprising a clamping member (7), characterized in that: The housing (1) is connected to an installation mechanism (2), the installation mechanism (2) is connected to a core body (3) and an anti-misalignment assembly (4), and the anti-misalignment assembly (4) is fixedly connected to a limit mechanism (5) and a torsion spring (6). The installation mechanism (2) includes a core frame (201). The anti-misassembly component (4) includes a baffle (401). The limiting mechanism (5) includes a connector (501).

2. The anti-misinstallation structure for a fuse as described in claim 1, characterized in that: The lower shell (101) has an inner cavity, and the clamping member (7) is disposed in the cavity.

3. The anti-misinstallation structure for a fuse as described in claim 2, characterized in that: A movable shaft is provided between the lower shell (101) and the upper shell (102).

4. The anti-misinstallation structure for a fuse as described in claim 3, characterized in that: The core frame (201) is fixedly connected to a rotating shaft sleeve (206), and the movable shaft connected to the lower shell (101) is rotatably connected to the rotating shaft sleeve (206).

5. The anti-misinstallation structure for a fuse as described in claim 4, characterized in that: The two side walls of the core-melting frame (201) are provided with slots (202), and the two inner side walls of the core-melting frame (201) near the anti-misalignment assembly (4) are provided with inclined slots (203). The core-melting frame (201) is fixedly connected to the mounting frame (204), and a core-melting chamber (205) is formed between the mounting frame (204) and the core-melting frame (201).

6. The anti-misinstallation structure for a fuse as described in claim 5, characterized in that: The core body (3) is located inside the core chamber (205). The core body (3) is provided with a boss (301). One end of the core body (3) with the boss (301) is clamped by a clamping member (7).

7. The anti-misinstallation structure for a fuse as described in claim 6, characterized in that: Both ends of the baffle (401) are fixedly connected to a locking block (402), and a connecting plate (403) is fixedly connected to the baffle (401). Two connecting seats (404) are fixedly connected to one end of the connecting plate (403) away from the baffle (401), and a movable shaft is fixedly connected between the two connecting seats (404).

8. The anti-misinstallation structure for a fuse as described in claim 7, characterized in that: The two card blocks (402) are respectively engaged with the two card slots (202), the connecting plate (403) is inserted into the inner side of the core frame (201), and the connecting seat (404) is fixedly connected to the movable shaft and rotatably connected to the connecting piece (501) and the torsion spring (6).

9. The anti-misinstallation structure for a fuse as described in claim 8, characterized in that: The connector (501) has two through holes (502), and the connector (501) is rotatably connected to the movable shaft through the two through holes (502). The connector (501) is fixedly connected to an abutment (503).

10. The anti-misinstallation structure for a fuse as described in claim 9, characterized in that: The torsion spring (6) is connected to a stop bar (601).

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