Fuse-embedded connector

Abstract

The application discloses a connector with built-in fuse, relates to the technical field of electrical connectors, and overcomes the defects of low structural integration, complex disassembly and assembly, and unfirm fixation of terminals and fuses in the prior art. An input end of the fuse is integrally fixed with a plug-in terminal sheet, and the plug-in terminal sheet constitutes an input end of the connector; a positioning seat and a rubber sleeve that cooperate with each other are further installed in the shell, a pipe accommodating cavity and a terminal mounting cavity that are in communication with each other are formed in the positioning seat, and the pipe accommodating cavity accommodates the fuse; the rubber sleeve is sleeved on the plug-in terminal sheet, and the rubber sleeve is fixedly connected with the positioning seat at a cavity opening of the pipe accommodating cavity. The overall assembly process is simplified, the structural integration is improved, internal components are effectively prevented from deviating, shaking or loosening under working conditions such as plug-in operation and equipment vibration, and the connection stability and use safety are improved; old fuses can be conveniently taken out and new fuses can be conveniently installed, the difficulty and complexity of replacement operation are greatly reduced, and the maintenance convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, and more specifically to a connector with a built-in fuse. Background Technology

[0002] Currently, connectors with built-in fuses are used in various electrical circuits, automotive circuits, consumer appliances, and various electrical control systems. Their core function is to provide overload, short-circuit, and overcurrent protection while offering a pluggable electrical connection interface. They are a crucial foundational component for ensuring the safety and stability of electrical equipment operation. A typical connector with a built-in fuse generally includes an insulating shell, conductive terminals, and a tubular fuse as core components. However, the overall assembly and fixed protective structure of mainstream traditional connectors with built-in fuses on the market are relatively fixed, exhibiting many inherent structural defects that make them difficult to adapt to high-precision, high-reliability electrical applications.

[0003] In existing conventional connector products with built-in fuses, the fuse is typically equipped with end caps or lead wires at both ends. These fuses are independent functional components and cannot directly form a pluggable input connection structure. To connect them to a circuit and achieve input-end plug-in adaptation, an independent connector terminal piece must be additionally assembled and fixed at the fuse input end through welding, riveting, or clamping. This external terminal piece is then plugged into the corresponding socket structure. The output end also requires a corresponding connection structure to complete circuit conduction. Furthermore, traditional products lack dedicated, independent fixed protection structures. The positioning and containment of the fuse and terminals rely entirely on the connector's external plastic housing or base. The housing only provides basic internal component enclosure and protection, offering limited functionality and extremely poor protection.

[0004] Long-term application has revealed numerous substantial defects in the structural design of existing traditional connectors with built-in fuses, severely impacting product assembly efficiency, operational stability, and protection performance. These defects are detailed below: First, the components are redundant and complex, the assembly process is cumbersome, and the conductivity reliability is poor. To connect it to the circuit and form a pluggable input, an additional independent connector must be installed at the fuse's input (e.g., through welding, riveting, or clamping). Similarly, the output also requires a separate connector to achieve electrical conduction and pluggable compatibility. This increases the number of components and assembly steps, raising production and assembly costs. Furthermore, the multi-component, separate-connection structure not only easily leads to assembly tolerances and loose connections, but also increases circuit contact resistance due to the additional connection points. Under long-term power-on conditions, this can easily cause overheating and abnormal conduction, increasing the risk of electrical failure.

[0005] Secondly, the components lack sufficient fixing constraints, resulting in poor connection stability during insertion and removal. Existing technologies rely solely on the external shell and base for overall containment and restraint, lacking independent, dedicated structures to specifically reinforce and rigidly constrain the fuses and terminals. During product insertion and removal operations, the insertion and removal forces are directly transmitted through the external terminal pieces to the fuse's connection point, easily causing problems such as solder joint cracking, loosening of riveting, and terminal misalignment. Furthermore, under complex scenarios such as equipment vibration and uneven operating conditions, the internal fuses and terminals are prone to shaking and loosening, leading to poor circuit contact, power outages, and in severe cases, safety hazards such as loose circuit connections and high-temperature fires. The product exhibits poor adaptability to complex operating conditions.

[0006] Third, when a fuse blows due to overcurrent and needs replacement, the traditional replacement procedure is extremely inconvenient. Because the input terminals and fuse are separate components, replacement requires first removing the entire connector from the device, then disassembling the outer housing, separating the blown fuse from the input and output terminals, then reconnecting the new fuse to both terminals, and finally reassembling the housing and reinstalling it back into the device. This process is cumbersome, difficult, and requires a certain level of skill from the operator. Furthermore, repeated disassembly and reassembly can easily lead to a decrease in terminal clamping force and loosening of the connection, further affecting the long-term reliability of the product.

[0007] In summary, traditional connectors with built-in fuses generally suffer from technical defects such as the need for additional adapter terminals to form a plug input terminal, a large number of parts, complex assembly, poor contact reliability, unreliable fixing and constraint between the fuse and the terminal, and cumbersome and inconvenient fuse replacement. They cannot meet the current high standards of use for electrical equipment, which require miniaturization, convenient assembly, high reliability, and high safety. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of existing connectors with built-in fuses, such as low structural integration, complex disassembly and assembly, and unreliable fixing of terminals and fuses, which make it difficult to meet the requirements of miniaturization, high reliability, high safety and rapid assembly of electrical equipment. This invention provides a connector with built-in fuses.

[0009] The technical solution of the present invention includes a housing and a fuse installed inside the housing. The input end of the fuse is integrally fixed with a connector terminal piece, which constitutes the input end of a connector. The output end of the fuse is connected to an output terminal. The housing also has a positioning seat and a rubber sleeve that cooperate with each other. The positioning seat has a tube cavity and a terminal mounting cavity that communicate with each other. The tube cavity accommodates the fuse and has an opening on one side of the front end of the tube cavity. The connector terminal piece extends out of the opening. The terminal mounting cavity accommodates and fixes the output terminal. The rubber sleeve is sleeved on the connector terminal piece and is fixedly connected to the positioning seat at the opening of the tube cavity.

[0010] By adopting the above technical solution, the connector terminal piece is integrally fixed to the input end of the fuse, making the fuse itself the input end of the connector. This eliminates the need for additional independent terminals and components in traditional structures, simplifying the overall assembly process, improving structural integration, reducing assembly tolerance accumulation, and lowering the risk of contact resistance and connection loosening. Simultaneously, to ensure more stable insertion and removal of the connector terminal piece, a mutually cooperating positioning seat and rubber sleeve are used. The positioning seat's cavity encloses and accommodates the fuse, while the rubber sleeve fits over the protruding connector terminal piece and is fixedly connected to the positioning seat at the cavity opening, forming a fixed protective structure independent of the outer shell. This structure provides targeted limiting, reinforcement, and insulation protection for fuse and terminal connections, replacing the traditional single-mode fixation relying solely on the housing. Under conditions such as insertion / removal operations and equipment vibration, it effectively prevents internal components from shifting, shaking, or loosening, improving connection stability and operational safety. More importantly, when a fuse blows and needs replacement, the positioning seat, along with the fuse and rubber sleeve, can be removed from the housing as a whole. There's no need to disassemble the input and output terminals individually; simply disconnecting the rubber sleeve from the positioning seat allows for easy removal of the old fuse and installation of the new one, significantly reducing the difficulty and complexity of replacement operations and improving maintenance convenience.

[0011] In one possible design, the connector terminals and the input terminal of the fuse are fixed together by welding or integral stamping.

[0012] The above design, while achieving an integrated structure of terminals and fuses, provides two mature and feasible production processes to adapt to different production scenarios and product specification requirements. Among them, the welding and fixing process is suitable for conventional mass production conditions, ensuring a firm connection and stable conductivity. The integrated stamping process can achieve a seamless integrated structure, further avoiding the risks of loose connections and poor connections, resulting in stronger overall structure and higher processing efficiency. In addition, the integrated connection ensures a firm connection between the two with low contact resistance, and when replacing the fuse, no additional disassembly or assembly operation is required at the input terminal connection, further simplifying the replacement process.

[0013] In one possible design, the connection structure between the output terminal and the fuse output terminal is as follows: one end of the output terminal has an annular sleeve, which is clamped onto the tube or end cap of the fuse output terminal and fixed by its own elastic contraction.

[0014] The above design utilizes the elastic contraction force of the clamp itself to hold and fix the fuse output tube or end cap, achieving rapid assembly and fixation without additional welding or riveting, further simplifying the output assembly process. Furthermore, when replacing the fuse, only a certain pulling force is needed to pull the old fuse out of the clamp, and then insert the new fuse into the clamp to complete the connection of the output end, without the need for welding or the use of special tools, making assembly simple and quick.

[0015] In one possible design, the clamp and the output terminal are integrally formed, and the clamp has circumferentially arranged elastic springs integrally formed on it.

[0016] The above design achieves integrated output terminal structure, reducing the number of parts and simplifying the assembly process. At the same time, the integrated elastic spring structure can enhance the elastic contraction force and clamping effect of the clamp, ensuring uniform force distribution and long-lasting elasticity. It is not prone to fatigue failure after long-term use, making fuse insertion and removal smoother. Even after multiple replacements, it can maintain good elastic clamping force, further improving the robustness of the output terminal connection, the overall structural integrity and electrical conductivity stability, and extending the product's service life.

[0017] In one possible design, the connection structure between the output terminal and the fuse output terminal is as follows: the output terminal of the fuse has an integrally formed plug, and the output terminal sheet has a socket along the thickness direction, with the plug being inserted into the socket; it also includes a retaining ring, which is sleeved on the plug and abuts against the output terminal sheet to prevent the plug from coming out of the socket.

[0018] The above design employs a plug-in connection method between the pins and the sockets to achieve rapid alignment and assembly, resulting in high assembly accuracy and a compact structure that meets the requirements of miniaturized product design. At the same time, the addition of a fixed retaining ring anti-disengagement limiting structure can effectively counteract the tendency of disengagement caused by insertion and extraction forces and mechanical vibrations, strictly limiting the relative offset and disengagement of the pins and sockets, and improving the anti-disengagement performance and structural stability of the output end plug-in connection.

[0019] In one possible design, the inner wall of the terminal mounting cavity of the positioning seat is provided with a mounting groove for positioning and fixing the retaining ring.

[0020] With the above design, a mounting groove for positioning and fixing the retaining ring is opened on the inner wall of the terminal mounting cavity of the positioning seat. This allows the retaining ring to be accurately positioned and constrained in the preset position after assembly, preventing it from shifting or falling off during use. When replacing the fuse, the mounting groove provides clear spatial guidance and positioning reference for the disassembly and reinstallation of the retaining ring, reducing the difficulty of operation.

[0021] In one possible design, the sleeve includes a rear insertion part and a front covering part. The rear insertion part is inserted into the cavity of the tube cavity by an interference fit. The rear insertion part has a plate-shaped hole through which the connector plate passes to be positioned and prevent the connector plate from rotating. The front covering part has a hollow inner cavity, and the front half of the connector plate is located in the hollow inner cavity.

[0022] The above design achieves a tight fixation between the rubber sleeve and the positioning seat by interfering with the cavity of the rear insertion part, ensuring a tight and secure connection between the rubber sleeve and the positioning seat, and providing strong shock resistance and stability. The plate-shaped hole of the rear insertion part matches the cross-sectional shape of the connector terminal piece, which can form a circumferential limit on the plate-shaped connector terminal piece, preventing rotation or displacement during the insertion and removal of the connector terminal piece. The hollow inner cavity of the front cover part covers the front half of the terminal piece, which can provide dustproof, waterproof and physical protection for the insertion interface, improving the protection performance and structural safety during insertion. In addition, the front cover part also provides an easy-to-grip operating part when replacing fuses. Operators can pinch the front cover part of the rubber sleeve for overall disassembly and assembly, making the operation more convenient.

[0023] In one possible design, the front end of the positioning seat extends integrally to form an edge platform, a rubber sleeve is installed on the edge platform, and the rubber sleeve and the edge platform are connected and fixed by a snap-fit ​​structure.

[0024] The above design, with its integrated extended front end and snap-fit ​​locking sleeve, simplifies the assembly process and improves assembly efficiency. At the same time, the snap-fit ​​locking structure is easy to install and remove and is firmly fixed, effectively resisting external forces and equipment vibrations, preventing the sleeve from loosening or shifting, and ensuring the sleeve's continuous protection and limiting effect on terminals and fuses. The structure is more reliable and has greater assembly versatility.

[0025] In one possible design, the positioning seat is provided with at least two tube loading cavities and at least two rubber sleeves, with the rear insert of each rubber sleeve inserted into the corresponding tube loading cavity opening, and adjacent rubber sleeves being connected to each other by a snap-fit ​​structure.

[0026] With the above design, adjacent rubber sleeves are interlocked and fixed together to form an integrated linkage structure, which is suitable for scenarios with multiple fuses. This structure makes each rubber sleeve restrain each other and the overall force is balanced, which enhances the overall rigidity of the fixing structure. Moreover, when replacing a single fuse, it is only necessary to release the buckle connection of the corresponding rubber sleeve to operate independently, which basically does not affect the normal fixing of other fuses, making maintenance flexible and convenient.

[0027] In one possible design, a shielding cover is also installed inside the housing. The shielding cover is fixedly connected to the positioning seat by a snap fastener, and the shielding cover fits snugly against the outer periphery of the rubber sleeve.

[0028] By adopting the above design, a stable overall frame is formed by the shielding cover, which enhances the overall rigidity of the fixed structure. At the same time, the shielding cover fits snugly around the outer edge of the rubber sleeve, which can apply radial restraint to the rubber sleeve and prevent radial displacement of the rubber sleeve due to force during insertion and removal, making the connection between the rubber sleeve and the positioning seat more stable and reliable. When the connector terminals are repeatedly inserted and removed, the insertion and removal force is transmitted through the rubber sleeve to the support structure formed by the shielding cover and the positioning seat, which effectively disperses the force and prevents the rubber sleeve from loosening or detaching from the positioning seat due to the insertion and removal force alone, further improving the product's insertion and removal life and connection stability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the external structure of Embodiment 1 of the present invention; Figure 2 This is a cross-sectional perspective view of Embodiment 1 of the present invention; Figure 3 This is an exploded view of Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the external structure of the main part of Embodiment 1 of the present invention; Figure 5 This is a partial structural schematic diagram of Embodiment 1 of the present invention; Figure 6 These are schematic diagrams of the external structure of the main parts of Embodiments 3 and 4 of the present invention; Figure 7 For the present invention Figure 6 A sectional perspective view; Figure 8 This is a schematic diagram of the assembly process in Embodiment 4 of the present invention; Figure 9 This is an exploded view of the main parts of Embodiment 4 of the present invention; Figure 10 This is a schematic diagram of the rubber sleeve installation process in Embodiment 4 of the present invention; Figure 11 This is a partial structural schematic diagram of Embodiment 4 of the present invention; Among them, 1. Shell; 2. Fuse; 21. Pole; 3. Connecting terminal pieces; 4. Output terminal; 41. Hoop; 411. Spring; 42. Socket; 5. Positioning seat; 51. Tube mounting cavity; 511. Slot; 52. Terminal mounting cavity; 521. Mounting groove; 53. Leading edge platform; 6. Rubber sleeve; 61. Rear insertion part; 611. Sheet-shaped hole; 62. Front cover part; 621. Hollow inner cavity; 7. Shielding cover; 8. Fixing ring. Detailed Implementation

[0030] like Figures 1 to 11 The connector with a built-in fuse shown mainly includes a housing 1, a fuse 2, a connector terminal piece 3, an output terminal 4, a positioning base 5, a rubber sleeve 6, and a shielding cover 7. The housing 1 is an integral external protective structure, injection molded from insulating rigid plastic. The fuse 2 is the core overcurrent protection component, with its input end integrally fixed to the connector terminal piece 3. This connector terminal piece 3 directly constitutes the connector's insertion input end, allowing direct insertion into a corresponding external socket to achieve circuit conduction. The output end of the fuse 2 is connected to the output terminal 4 using a corresponding connection structure. The positioning base 5 and the rubber sleeve 6 cooperate to form an independent fixing structure, installed inside the housing 1, used for positioning and insulating the fuse 2, connector terminal piece 3, and output terminal 4. The shielding cover 7 is installed between the housing 1 and the positioning base 5, snapped together with the positioning base 5, and covers the outer perimeter of the rubber sleeve 6, forming a double-reinforced limiting structure.

[0031] Fuse 2 is a conventional tubular glass or ceramic fuse with a metal cap at its input end. Terminal piece 3 is a conductive metal sheet, which is fixed to the metal cap at the input end of fuse 2 by welding or integral stamping. Welding is suitable for conventional mass production, using soldering or resistance welding processes, resulting in a strong connection and stable conductivity. Integral stamping, terminal piece 3 and the input cap of fuse 2 are stamped from the same metal strip into a single structure, forming a seamless structure with enhanced overall integrity. The shape of terminal piece 3 is adapted to the external socket, typically a flat rectangular sheet with a guide chamfer at the front end for easy insertion and removal.

[0032] The positioning base 5 is a one-piece molded rigid rubber insulating structure, with interconnected tubing cavities 51 and terminal mounting cavities 52 inside. The tubing cavity 51 is formed from one side of the front end of the positioning base 5, and its inner diameter matches the outer diameter of the fuse 2, serving to accommodate and radially limit the fuse 2. The front end of the tubing cavity 51 has an opening from which the connector terminal 3 extends outward. In a 90-degree connector, the terminal mounting cavity 52 is formed from the bottom end of the positioning base 5, vertically connected to the tubing cavity 51, serving to accommodate and fix the output terminal 4.

[0033] The sleeve 6 is made of hard rubber insulation material and includes an integrally molded rear insertion part 61 and a front covering part 62. The rear insertion part 61 is usually a cylindrical structure, with its outer diameter slightly larger than the inner diameter of the cavity 51. It is inserted into the cavity with an interference fit to achieve initial fixation between the sleeve 6 and the positioning seat 5. The center of the rear insertion part 61 has a plate-shaped hole 611 that matches the shape of the connector terminal piece 3. The connector terminal piece 3 passes through the plate-shaped hole 611, and the inner wall of the plate-shaped hole 611 fits tightly against the side of the connector terminal piece 3 to form a circumferential limit, which can effectively prevent the connector terminal piece 3 from rotating during insertion and removal. The front covering part 62 is a hollow rectangular or cylindrical structure with a hollow inner cavity 621 inside. The front half of the connector terminal piece 3 is housed in the hollow inner cavity 621 to achieve insulation and physical protection for the connector terminal piece 3. Meanwhile, the tubular shape of the front cover 62 provides an easy-to-grip operating part for the operator. When replacing fuse 2, the front cover 62 can be pinched to perform the replacement operation.

[0034] The shielding cover 7 is a cover-shaped structure formed by stamping a thin metal sheet, providing electromagnetic shielding. Its shape is adapted to the profile of the rubber sleeve 6 and the front end of the positioning seat 5. The shielding cover 7 and the positioning seat 5 are fixedly connected by snap-fit. Specifically, a locking platform or slot can be provided on the outer wall of the positioning seat 5, and elastic claws or holes can be provided at corresponding positions on the shielding cover 7, which interlock with each other. The shielding cover 7 also fits snugly around the periphery of the rubber sleeve 6. Specifically, the front end of the shielding cover 7 extends to the outer wall of the front end of the rubber sleeve 6 and / or the positioning seat 5, fitting tightly against the corresponding outer wall. In this way, the shielding cover 7 can apply radial restraint to the rubber sleeve 6, preventing the rubber sleeve 6 from radially shifting due to force during insertion and removal, making the connection between the rubber sleeve 6 and the positioning seat 5 more stable and reliable. At the same time, the snap-fit ​​connection between the shielding cover 7 and the positioning seat 5 forms a stable overall frame, enhancing the overall rigidity of the entire fixing structure.

[0035] In this invention, the connection between the output terminal of fuse 2 and the output terminal 4, and the fixed connection between the rubber sleeve 6 and the positioning seat 5, belong to different functional modules, are independent of each other, and can be cross-combined. Specifically: The output connection methods mainly include two types: clamp type and plug type. The clamp type refers to the output terminal 4 having a circular clamp 41, which is set on the output end of the fuse 2 by elastic contraction clamp; the plug type refers to the output end of the fuse 2 having an integrally formed plug 21, which cooperates with the plug hole 42 on the output terminal 4 and is locked by the fixing ring 8.

[0036] The fixed connection between the rubber sleeve 6 and the positioning seat 5 mainly includes two types: the front edge stage 53 snap-fit ​​type and the multi-cavity interlocking type. The front edge stage 53 snap-fit ​​type means that the front end of the positioning seat 5 extends to form the front edge stage 53, and the rubber sleeve 6 is connected to the front edge stage 53 by snap-fit; the multi-cavity interlocking type means that the positioning seat 5 has multiple tube-loading cavities 51 and corresponding to multiple rubber sleeves 6, and adjacent rubber sleeves 6 are connected to each other by snap-fit.

[0037] Either of the two output connection methods described above can be combined with either of the two sleeve fixing methods described above. For ease of understanding, several typical combinations are selected below for detailed explanation, but the scope of protection of this invention is not limited to the listed combinations. Example 1

[0038] like Figures 1 to 5 As shown, this embodiment is a basic embodiment. The output end adopts a hoop-type connection structure, and the rubber sleeve 6 and the positioning seat 5 are fixed by the front edge platform 53.

[0039] Hoop-type connection structure: One end of the output terminal 4 is integrally formed with an annular hoop 41. The inner diameter of the hoop 41 is slightly smaller than the outer diameter of the output tube or end cap of the fuse 2. It is held and fixed to the output end of the fuse 2 by its own elastic contraction force, achieving reliable electrical connection and mechanical fixation. Preferably, multiple elastic spring pieces 411 are integrally formed on the inner wall of the hoop 41 in a ring shape and evenly arranged. The spring pieces 411 are distributed at intervals along the circumference of the hoop 41. The elastic spring pieces 411 protrude inward to enhance the elastic contraction force and clamping effect of the hoop 41, and always maintain elastic contact with the end of the fuse 2, compensating for gaps caused by assembly tolerances and mechanical vibration. The hoop 41 and the output terminal 4 are integrally formed from metal sheets after stamping and rolling, which is simple to manufacture and has high structural strength.

[0040] In this embodiment, the rubber sleeve 6 and the positioning seat 5 are fixed by a snap-fit ​​method using the leading edge platform 53. The front end of the positioning seat 5 integrally extends to form the leading edge platform 53, which protrudes forward axially from the opening of the cavity 51. After the rear insertion part 61 of the rubber sleeve 6 is inserted into the cavity, the contact surfaces of the rubber sleeve 6 and the leading edge platform 53 are in contact, and the rubber sleeve 6 and the leading edge platform 53 are connected and fixed by a snap-fit ​​structure. Specifically, at least two snap-fit ​​arms are provided on the outer wall of the rubber sleeve 6, and corresponding snap-fit ​​grooves are provided on the outer wall of the leading edge platform 53. The rubber sleeve 6 and the leading edge platform 53 are locked and fixed by the cooperation of the snap-fit ​​arms and the snap-fit ​​grooves. When replacing the fuse 2, the rubber sleeve 6 and the leading edge platform 53 can be separated simply by releasing the snap-fit ​​arms, which is quick to disassemble and reassemble and can be reused.

[0041] During overall assembly, the connector terminal piece 3 is already fixed to the input end of the fuse 2. First, the sleeve 41 of the output terminal 4 is inserted into the terminal mounting cavity 52. ​​Then, the fuse 2 is inserted into the tube mounting cavity 51 from the front end of the positioning seat 5, so that the output end of the fuse 2 is inserted into the sleeve 41 to form a preliminary fixation, and the connector terminal piece 3 extends out from the cavity opening. Next, the rear insertion part 61 of the rubber sleeve 6 is inserted into the cavity opening, so that the connector terminal piece 3 passes through the plate-shaped hole 611, and the rubber sleeve 6 is locked on the front edge platform 53 by the snap-fit ​​structure. Finally, after the rubber sleeve 6 is fixed and before the overall assembly is installed into the housing 1, the shielding cover 7 is installed, and the corresponding snap-fit ​​structure is used for positioning and fixation. Finally, the assembled assembly is installed into the housing 1 to complete the overall assembly.

[0042] To replace fuse 2, release the clip between the rubber sleeve 6 and the front end 53, and pull out the rubber sleeve 6 to remove the old fuse 2 from the housing cavity 51. Since the output end is elastically fixed by the clamp 41, a slight pull is sufficient to pull the fuse 2 out of the clamp 41. After inserting the new fuse 2, reinsert the rubber sleeve 6 into the cavity and secure it with the clip. The replacement operation is simple. Example 2

[0043] The main difference between this embodiment and Embodiment 1 is that a plug-in connection structure is used between output terminal 4 and the output terminal of fuse 2. (See reference...) Figures 7-9 , Figure 11 The plug-in connection structure.

[0044] Specifically, a post 21 is integrally formed on the end cap of the output terminal of fuse 2. The post 21 is cylindrical or square and extends outward along the axial direction of fuse 2. A socket 42 is formed on the sheet of output terminal 4 along its thickness direction. The shape of the socket 42 matches the cross-sectional shape of the post 21. The post 21 is inserted into the socket 42 to realize the electrical and mechanical connection between output terminal 4 and fuse 2. To enhance the connection reliability, a retaining ring 8 is also provided. The retaining ring 8 is sleeved on the post 21 and abuts against the surface of the sheet of output terminal 4 to prevent the post 21 from coming out of the socket 42. Furthermore, the end face of the retaining ring 8 abuts against the rear end face of the sheet of output terminal 4 to form an axial anti-disengagement limit to prevent the post 21 from coming out of the socket 42. The retaining ring 8 can be an elastic open retaining ring made of spring steel or stainless steel, which uses its own elasticity to clamp onto the outer periphery of post 21.

[0045] The terminal mounting cavity 52 of the positioning seat 5 has a mounting groove 521 on its inner wall for positioning and accommodating the retaining ring 8. A slot 511 is formed at the bottom of the tube mounting cavity 51 for the insertion and positioning of the insert post 21.

[0046] In this embodiment, the rubber sleeve 6 and the positioning seat 5 still adopt the snap-fit ​​fixing method of the front edge platform 53, and its structure, assembly and replacement operation are basically the same as those in Embodiment 1.

[0047] During overall assembly, first fix the retaining ring 8 in the mounting groove 521, then put one end of the output terminal 4's socket 42 into the terminal mounting cavity 52, so that the socket 42 and the retaining ring 8's locking hole correspond; then insert the fuse 2 from the front end of the positioning seat 5 into the tube cavity 51, so that the plug 21 is inserted into the socket 42, the retaining ring 8's locking hole, and the slot 511 in sequence, and the output end of the fuse 2 is initially fixed; then the connector terminal piece 3 extends out of the cavity, and the subsequent steps are basically the same as in Embodiment 1.

[0048] When replacing fuse 2, release the snap connection between the rubber sleeve 6 and the front end 53, pull out the rubber sleeve 6, and the old fuse 2 can be removed from the housing cavity 51; since the output end is fixed by plugging, the fuse 2 can be pulled out from the retaining ring 8 with a little pulling force; then the new fuse 2 can be replaced, and it can be put back into the retaining ring 8 and snapped into the mounting groove 521. Example 3

[0049] The main difference between this embodiment and Embodiment 1 is that the positioning seat 5 has at least two tube-loading cavities 51, and correspondingly at least two rubber sleeves 6 are configured. The rubber sleeves 6 and the positioning seat 5 are fixed by a multi-cavity interlocking method. In this embodiment, the output terminal 4 and the output terminal of the fuse 2 still adopt a clamp-type connection structure, and its specific structure is the same as that of Embodiment 1. (See reference...) Figures 6-11 Multi-cavity interlocking fixing method.

[0050] Regarding the fixing of the sleeve 6, the positioning seat 5 has at least two parallel and independent tube mounting cavities 51. Each tube mounting cavity 51 corresponds to a fuse 2, a connector terminal piece 3, an output terminal 4, and a sleeve 6. Each tube mounting cavity 51 has an opening at its front end, and the rear insertion part 61 of each sleeve 6 is inserted into the corresponding opening. Adjacent sleeves 6 have mutually cooperating snap-fit ​​structures on their side walls, which lock adjacent sleeves 6 together to form an integrated, linked fixing structure. Specifically, a hook or groove can be provided on the side wall of one sleeve 6, and a corresponding groove or hook can be provided on the side wall of adjacent sleeves 6, with the two engaging with each other. The sleeves 6 mutually restrain each other, resulting in balanced overall force and enhancing the overall rigidity of the fixing structure. When replacing a single fuse 2, simply release the snap-fit ​​connection between the corresponding sleeve 6 and the adjacent sleeve 6 for independent operation, without affecting the normal fixing of other fuses 2. Example 4

[0051] like Figures 6-11As shown, the main difference between this embodiment and Embodiment 3 is that the output terminal 4 and the output terminal of the fuse 2 adopt a plug-in connection structure, the specific structure of which is the same as the plug-in structure described in Embodiment 2. The rubber sleeve 6 and the positioning seat 5 adopt the multi-cavity interlocking fixing method described in Embodiment 3. The remaining structures and replacement operations can be referred to the aforementioned embodiments, and will not be repeated here.

[0052] It should be noted that the above four embodiments are merely preferred combinations of the present invention and are not exhaustive. Based on the concept of the present invention, those skilled in the art can reasonably combine and modify the various technical features disclosed above according to actual application needs. For example, the integral fixing method of the connector terminal piece can be either welding or integral stamping, and can be combined with any output terminal connection method and any rubber sleeve fixing method; the shielding cover, as a further optimized technical feature, can also be selectively applied to any of the above embodiments according to the product protection level requirements. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A connector with a built-in fuse, comprising a housing (1) and a fuse (2) installed within the housing (1), characterized in that: The input end of the fuse (2) is integrally fixed with a connector terminal piece (3), which constitutes the input end of the connector; the output end of the fuse (2) is connected to an output terminal (4). The housing (1) is also equipped with a positioning seat (5) and a rubber sleeve (6) that cooperate with each other. The positioning seat (5) has a tube mounting cavity (51) and a terminal mounting cavity (52) that communicate with each other. The tube mounting cavity (51) accommodates the fuse (2) and has an opening on one side of the front end of the tube mounting cavity (51). The plug-in terminal piece (3) extends out from the opening. The terminal mounting cavity (52) accommodates and fixes the output terminal (4). The rubber sleeve (6) is sleeved on the plug-in terminal piece (3) and the rubber sleeve (6) is fixedly connected to the positioning seat (5) at the opening of the tube mounting cavity (51).

2. The connector with a built-in fuse according to claim 1, characterized in that: The connector terminal (3) and the input end of the fuse (2) are fixed together by welding or integral stamping.

3. The connector with a built-in fuse according to claim 1 or 2, characterized in that: The connection structure between the output terminal (4) and the output terminal of the fuse (2) is as follows: one end of the output terminal (4) has a circular sleeve (41), which is clamped onto the tube or end cap of the output terminal of the fuse (2) and fixed by its own elastic contraction.

4. The connector with a built-in fuse according to claim 3, characterized in that: The sleeve (41) is integrally formed with the output terminal (4), and the sleeve (41) has an integrally formed circumferentially arranged elastic spring sheet (411).

5. The connector with a built-in fuse according to claim 1 or 2, characterized in that: The connection structure between the output terminal (4) and the output terminal of the fuse (2) is as follows: the output terminal of the fuse (2) has an integrally formed plug (21), and the output terminal (4) has a socket (42) along the thickness direction on the sheet, and the plug (21) is inserted into the socket (42); it also includes a retaining ring (8), which is sleeved on the plug (21) and abuts against the sheet of the output terminal (4) to restrict the plug (21) from coming out of the socket (42).

6. The connector with a built-in fuse according to claim 5, characterized in that: The terminal mounting cavity (52) of the positioning seat (5) has an mounting groove (521) for positioning the fixing ring (8) on its inner wall.

7. The connector with a built-in fuse according to claim 1 or 2, characterized in that: The sleeve (6) includes a rear insertion part (61) and a front cover part (62). The rear insertion part (61) is inserted into the cavity of the tube cavity (51) in an interference fit manner. The rear insertion part (61) has a plate-shaped hole (611). The connector terminal piece (3) passes through the plate-shaped hole (611) to be positioned and to prevent the connector terminal piece (3) from rotating. The front cover part (62) has a hollow inner cavity (621). The front half of the connector terminal piece (3) is located in the hollow inner cavity (621).

8. The connector with a built-in fuse according to claim 7, characterized in that: The front end of the positioning seat (5) extends integrally to form an edge platform (53), the rubber sleeve (6) is installed on the edge platform (53), and the rubber sleeve (6) and the edge platform (53) are connected and fixed by a snap-fit ​​structure.

9. The connector with a built-in fuse according to claim 7, characterized in that: The positioning seat (5) is provided with at least two tube loading cavities (51), and correspondingly provided with at least two rubber sleeves (6). The rear insertion part (61) of each rubber sleeve (6) is inserted into the cavity of the corresponding tube loading cavity (51), and adjacent rubber sleeves (6) are connected to each other by a snap-fit ​​structure.

10. The connector with a built-in fuse according to claim 1 or 2, characterized in that: The housing (1) is also equipped with a shield (7), which is fixedly connected to the positioning seat (5) by a snap fastener, and the shield (7) fits against the outer periphery of the rubber sleeve (6).

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