A controlled thermomelt cutter

Abstract

This application relates to the field of thermoelectric cutters, and particularly to a controlled thermoelectric cutter. The controlled thermoelectric cutter includes a bridging element, a flexible pin, and two main circuit electrodes. At least one end of the bridging element is electrically connected to the two main circuit electrodes via a thermoelectric element. One end of the flexible pin is disposed on the inner wall of the housing, and the other end abuts against the bridging element. The flexible pin includes a telescopic head and a sleeve fitted over the telescopic head, with an inner cavity inside the sleeve for the telescopic head to move. An elastic element is provided on the outer circumferential surface of the telescopic head. The free end of the elastic element is compressed and inserted between the outer circumferential surface of the telescopic head and the inner wall of the sleeve. Through structural design, this application ensures that when overcharging occurs in the circuit, the bridging element separates from the main circuit electrodes, cutting off the main circuit and thus the heating circuit. Simultaneously, the elastic element on the telescopic head of the flexible pin effectively prevents the bridging element from falling back onto the main circuit electrodes, thus ensuring a complete circuit break and improving the stability and reliability of the device's circuit-breaking capability.

Description

Technical Field

[0001] This application relates to the field of thermomelt cutters, and particularly to a controlled thermomelt cutter. Background Technology

[0002] Currently, controlled thermal fusion cutters achieve their controlled melting function by heating an element to melt the fusible alloy, thus breaking the circuit. However, this method results in a long melting time and poor circuit breaking effect.

[0003] Existing research involves welding electrode sheets to conductive bridging components. During use, the heat generated melts the low-melting-point solder at the welding points on the electrode sheets, and an elastic element applies force to push the bridging component away from the electrode, thus breaking the conductive circuit and achieving a circuit breaking effect. However, the elastic element mainly relies on rebound force, which can easily lead to abnormal retraction due to gravity, pressure, or other factors, causing the circuit to reconnect and resulting in a poor circuit breaking effect, posing potential risks. Utility Model Content

[0004] To address the problems mentioned in the background section, this application provides a controlled thermoelectric cutter, the technical solution of which is as follows:

[0005] The controlled thermoplastic cutter includes a bridging component, an elastic pin, and two main circuit electrodes disposed within the inner cavity of the housing. At least one end of the bridging component is electrically connected to the two main circuit electrodes via a thermoplastic component. One end of the elastic pin is disposed on the inner wall surface of the housing, and the other end abuts against the bridging component. The elastic pin includes a telescopic head and a sleeve fitted over the telescopic head. The sleeve has an inner cavity for the telescopic head to move. An elastic element is disposed on the outer peripheral surface of the telescopic head. One end of the elastic element is fixed to the outer peripheral surface of the telescopic head, and the other end is a free end. The free end is compressed and inserted between the outer peripheral surface of the telescopic head and the inner wall surface of the sleeve, so that when the thermoplastic component melts, the telescopic head moves upward, and the elastic element springs away from the outer peripheral surface of the telescopic head and abuts against the top outer peripheral surface of the sleeve.

[0006] In some embodiments, the bridging component further includes a heating element; the heating element is the lower surface of the bridging component, the elastic pin abuts against the heating element and is electrically connected to the heating element; it also includes an auxiliary elastic displacement member; one end of the auxiliary elastic displacement member is connected to the inner wall surface of the housing, and the other end is compressed against the lower part of the heating element of the bridging component, so that when the hot melt component melts, the auxiliary elastic displacement member springs up to separate the bridging component from the main circuit electrode.

[0007] In some embodiments, a collar is fitted around the outer periphery of the telescopic head, and the elastic element is provided on the collar; the outer diameter of the collar is smaller than the inner diameter of the inner cavity of the housing, so that when the telescopic head is retracted into the inner cavity of the housing, the collar is located between the outer periphery of the telescopic head and the inner wall of the housing, and the elastic element is compressed and abuts against the outer periphery of the telescopic head and the inner wall of the housing; when the telescopic head extends out of the inner cavity of the housing, the elastic element bounces away from the outer periphery of the telescopic head and abuts against the top outer periphery of the housing.

[0008] In some embodiments, the collar is provided with a fixing hole, and the outer peripheral surface of the telescopic head is provided with a fixing protrusion that matches the fixing hole, so that the fixing protrusion is engaged in the fixing hole.

[0009] In some embodiments, the outer peripheral surface of the telescopic head is provided with at least a pair of opposing elastic elements, and the two elastic elements are located on both sides of the outer peripheral surface of the telescopic head.

[0010] In some embodiments, the outer casing includes an upper casing and a base; the base is provided with a first positioning groove that matches the bottom of the casing, and the bottom of the elastic pin is installed in the first positioning groove; the heating element is provided with a first positioning through hole that matches the top of the telescopic head, and the top of the telescopic head is embedded in the first positioning through hole.

[0011] In some embodiments, the housing includes an upper shell and a base; the base is provided with a second positioning groove that matches the bottom of the auxiliary elastic displacement member, and the auxiliary elastic displacement member is installed in the second positioning groove.

[0012] In some embodiments, the top of the elastic displacement member is provided with a washer, and the heating element is provided with a second positioning through hole that matches the washer, and the top of the elastic displacement member is embedded in the second positioning through hole.

[0013] In some embodiments, the auxiliary elastic displacement member is sleeved on the outside of the elastic pin, and / or the auxiliary elastic displacement member is arranged independently of the elastic pin; the main circuit electrode is a side-mounted "U"-shaped structure or an "I"-shaped structure, and its top surface is connected to the main circuit electrode.

[0014] In some embodiments, the auxiliary elastic displacement member is an auxiliary spring.

[0015] In some embodiments, the bridging element includes one of a fusible alloy, an electrode sheet, and a fuse.

[0016] In some embodiments, the hot melt component is a heat-sensitive component, which is a fusible alloy solder.

[0017] The controlled thermomelting cutter provided in this application has the following beneficial effects:

[0018] This application utilizes a flexible ejector pin in conjunction with a bridging component and two main circuit electrodes. When overcharging occurs, the thermoplastic component melts, causing the telescopic head of the flexible ejector pin to extend rapidly. This pushes the bridging component upwards, separating it from the main circuit electrodes and cutting off the main circuit, thereby interrupting the heating circuit. Simultaneously, the telescopic head of the flexible ejector pin is equipped with an elastic element to prevent it from falling back into the sleeve cavity due to the gravity of the bridging component after extension. This effectively avoids the bridging component falling back onto the main circuit electrodes and causing the circuit to be mistakenly reconnected. Through this design, a complete circuit break is ensured, improving the stability and reliability of the device's circuit-breaking capability.

[0019] Other features and beneficial effects of this application will be set forth in the following description, and some of the technical features and beneficial effects may be obvious from the description or learned by practicing this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, some of the drawings in the following description are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the controlled thermomelting cutter provided in Embodiment 1 of this application;

[0022] Figure 2 This is a partial component disassembly diagram provided in Embodiment 1 of this application;

[0023] Figure 3 From Figure 1 A schematic diagram of the internal structure formed by cutting the outer shell along line AA;

[0024] Figure 4 This is a schematic diagram of the controlled thermomelting cutter provided in Embodiment 2 of this application;

[0025] Figure 5 This is a partial component disassembly diagram provided in Embodiment 2 of this application;

[0026] Figure 6 From Figure 4 A schematic diagram of the internal structure formed by cutting the outer shell along the BB line;

[0027] Figure 7 This is a schematic diagram of the controlled thermomelting cutter provided in Embodiment 3 of this application;

[0028] Figure 8 This is a partial component disassembly diagram provided in Embodiment 3 of this application;

[0029] Figure 9 From Figure 7 A schematic diagram of the internal structure formed by cutting the outer shell along the CC line;

[0030] Figure 10 This is a schematic diagram of the structure of the elastic pin in the controlled thermomelting cutter provided in Embodiments 1-3 of this application;

[0031] Figure 11 This is a partial enlarged view of the elastic ejector pin in the controlled thermoforming cutter provided in Embodiments 1-3 of this application;

[0032] Figure 12 Cross-section of the elastic ejector pin in the controlled thermoforming cutter provided in Embodiments 1-3 of this application. Figure 1 ;

[0033] Figure 13 Cross-section of the elastic ejector pin in the controlled thermoforming cutter provided in Embodiments 1-3 of this application. Figure 2 ;

[0034] Figure 14 This is a schematic diagram of the structure of the elastic pin in the controlled thermomelting cutter provided in Embodiment 4 of this application;

[0035] Figure 15 This is a partial enlarged view of the elastic ejector pin in the controlled thermomelting cutter provided in Embodiment 4 of this application;

[0036] Figure 16 This is a schematic diagram of the structure of the elastic pin in the controlled thermomelting cutter provided in Embodiment 5 of this application;

[0037] Figure 17 for Figure 16 A schematic diagram of the telescopic head of a medium-elasticity ejector pin;

[0038] Figure 18 for Figure 17 A magnified view of a portion of the image;

[0039] Figure 19 This is a schematic diagram illustrating the operating principle of the controlled thermomelting cutter provided in Embodiments 1-3 of this application.

[0040] Figure label:

[0041] 10. Outer shell; 20. Bridging component; 30. Elastic ejector pin; 40. Main circuit electrode component; 50. Auxiliary elastic displacement component; 60. Thermofused component; 110. Upper shell; 120. Base; 121. First positioning groove; 122. Second positioning groove; 123. Third positioning groove; 210. Heating element; 220. Conductive component; 230. Flux for fusion; 211. First positioning through hole; 212. Second positioning through hole; 310. Telescopic head; 320. Sleeve; 330. Elastic component; 340. Collar; 311. Fixing protrusion; 341. Fixing hole; 510. Washer. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The technical features designed in the different implementations of this application described below can be combined with each other as long as they do not conflict with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof mean "at least comprising."

[0044] This application provides as follows: Figure 1-14 The controlled thermoelectric cutter provided in Examples 1, 2, and 3 are shown below:

[0045] Example 1

[0046] like Figure 1-3 , Figure 10-13 , Figure 19As shown: The controlled thermoelectric cutter provided in the embodiment includes a bridging member 20 disposed in the inner cavity of the housing 10, a conductive elastic pin 30, and two main circuit electrodes 40.

[0047] The two opposite ends of the bridging component 20 are respectively connected to the two main circuit electrode components 40 by a thermosetting component 60 (not shown in the structural diagram, see principle diagram for details). Figure 19 The bridging component 20 includes a heating element 210 for conducting heat to the heat-fused component 60 and a conductive component 220 for electrically connecting the two main circuit electrode components 40; the elastic pin 30 includes a telescopic head 310 and a sleeve 320 sleeved outside the telescopic head 310. The telescopic head 310 can move in the cavity of the sleeve 320. An elastic element 330 is provided on the outer peripheral surface of the telescopic head 310. One end of the elastic element 330 is fixed to the outer peripheral surface of the elastic pin 30, and the other end is a free end. The free end is away from the outer peripheral surface of the elastic pin 30 in its natural state.

[0048] The bottom of the housing 320 is connected to the inner wall of the outer casing 10. The top of the telescopic head 310 is compressed against the heating element 210 of the bridging member 20 under the gravity of the bridging member above it. The telescopic head 310 is retracted into the inner cavity of the housing 320. The free end of the elastic member 330 is compressed against the outer peripheral surface of the telescopic head 310 and the inner wall of the housing 320. When the thermoplastic member 60 melts, the elastic pin 30 is released from its restraint, and the telescopic head 310... The 0 extends out of the inner cavity of the housing 320, causing the bridging member 20 to move upward, separating it from the main circuit electrode 40. The elastic member 330 returns to its original shape, springing away from the outer peripheral surface of the telescopic head 310 and pressing against the top outer peripheral surface of the housing 320, thus fixing the final position of the telescopic head 310. The telescopic head 310 supports the falling bridging member 20, fixing it away from the main circuit electrode 40 and ensuring complete current disconnection. Optionally, in this embodiment, the conductive component 220 is a fuse. The thermoplastic component 60 is a heat-sensitive component made of fusible alloy solder.

[0049] Specifically, the operation process and working principle of the controlled thermoelectric cutter are as follows:

[0050] The two main circuit electrode components 40 are electrically connected to the bridging component 20 as two terminals (first terminal and second terminal) to form the main circuit. When the main circuit is overloaded, the conductive component 220 used to conductively connect the two main circuit electrode components 40 melts and cuts off the main circuit.

[0051] In the normal initial state, i.e., when the circuit has not been overcharged, the thermally sensitive component (i.e., the fusible element 60) does not fuse, and it fixes the bridging element 20 to the two main circuit electrode elements 40. At this time, as Figure 13 As shown, under the action of the fixed bridging member 20, the telescopic head 310 of the elastic pin 30 is compressed in the inner cavity of the housing 320, and the elastic member 330 is located between the outer peripheral surface of the telescopic head 310 and the inner wall surface of the housing 320, and is compressed and attached to the outer peripheral surface of the telescopic head 310.

[0052] When the circuit is overcharged, the conductive elastic pin 30 is connected as the third terminal. Since the elastic pin 30 abuts against the heating element 210 below the bridging member 20, the heating element 210 generates heat and transfers the heat to the heat-sensitive component (i.e., the heat-fused component 60). The heat-fused component 60 melts, and the telescopic head 310 of the elastic pin 30 is no longer restricted by the force of the bridging member 20. It springs back and extends out of the inner cavity of the housing 320, giving the bridging member 20 an upward thrust, causing the bridging member 20 to separate from the two main circuit electrode components 40 and cut off the circuit.

[0053] Among them, such as Figure 12 After the telescopic head 310 springs back out of the inner cavity of the sleeve 320, the elastic element 330 springs outward and abuts against the outer peripheral surface of the top of the sleeve 320, supporting and locking the telescopic head 310 above the sleeve 320. It will not fall back into the inner cavity of the sleeve due to gravity or the pressure of the bridging piece, thus preventing the telescopic head 310 from falling back and failing to prevent the bridging piece 20 from falling back onto the main circuit electrode piece 40 for connection, which would cause the circuit to be mistakenly reconnected.

[0054] It should be noted that the two ends of the bridging member 20 are not necessarily both connected to the main circuit electrode 40 via the thermoplastic member 60. Optionally, the bridging member 20 may only have one end connected to any main circuit electrode 40 via the thermoplastic member 60, and the other end of the bridging member 20 may be movably electrically connected to another main circuit electrode 40, and this connection may be configured not to affect the displacement of the end where the thermoplastic member 60 is located. It should be noted that embodiments 1-3 are merely feasible examples, and in practice, the above-described scheme of having only one end of the bridging member 20 connected to any main circuit electrode 40 via the thermoplastic member 60 can be adopted.

[0055] Optionally, no heating element 210 is provided below the bridging component 20. When the main circuit temperature is abnormal, the heat-melting component 60 melts due to heat, and the telescopic head 310 of the elastic pin 30 is no longer restricted by the force of the bridging component 20. It springs back and extends out of the inner cavity of the housing 320, giving the bridging component 20 an upward thrust, so that the bridging component 20 separates from the two main circuit electrode components 40 and cuts off the circuit.

[0056] Alternatively, the upward movement of the telescopic head 310 can be powered by a compression spring within the cavity of the housing 320.

[0057] Optionally, the telescopic head 310 has two opposing elastic elements 330 on its outer peripheral surface, with the two elastic elements 330 located on both sides of the outer peripheral surface of the telescopic head 310. This design helps to improve the stability of the telescopic head 310 when it is supported and locked above the housing 320.

[0058] Optionally, the base 120 is provided with a first positioning groove 121 that matches the bottom of the housing 320, and the bottom of the housing 320 of the elastic pin 30 is installed in the first positioning groove 121; the heating element 210 is provided with a first positioning through hole 211 that matches the top of the telescopic head 310, and the top of the telescopic head 310 is embedded in the first positioning through hole 211.

[0059] The design of the first positioning groove 121 and the first positioning through hole 211 improves the installation stability of the elastic ejector pin 30, so that when the elastic ejector pin 30 rebounds, the bridging member 20 will not slip off the top of the telescopic head 310, making the pushing action of the elastic ejector pin 30 on the bridging member 20 more accurate and stable.

[0060] Optionally, it also includes an auxiliary elastic displacement member 50; one end of the auxiliary elastic displacement member 50 is connected to the inner wall surface of the housing 10, and the other end is compressed against the heating element 210 of the bridging member 20, so that when the fusible link 60 melts, the auxiliary elastic displacement member 50 springs up to separate the bridging member 20 from the main circuit electrode 40. The auxiliary elastic displacement member 50 is an auxiliary spring;

[0061] By cooperating with the auxiliary mechanical displacement component design, it provides an upward thrust to the bridging component 20, allowing the bridging component 20 to separate from the two main circuit electrode components 40, cutting off the circuit, improving the controlled melting effect of the device, and improving the insulation withstand voltage capability.

[0062] Optionally, the auxiliary elastic displacement member 50 is arranged independently of the elastic pin 30; the base 120 is provided with a second positioning groove 122 that matches the bottom of the auxiliary elastic displacement member 50, and the auxiliary elastic displacement member 50 is installed in the second positioning groove 122. The top of the elastic displacement member is provided with a washer 510, and the heating element 210 is provided with a second positioning through hole 212 that matches the washer 510, and the top of the elastic displacement member is embedded in the second positioning through hole 212.

[0063] The design of the second positioning groove 122 and the second positioning through hole 212 enhances the installation stability of the auxiliary elastic displacement component 50, ensuring that the bridging component 20 does not slip off the top of the auxiliary elastic displacement component 50 when the elastic displacement component rebounds. This makes the pushing action of the elastic displacement component on the bridging component 20 more accurate and stable. Optionally, in this embodiment, two auxiliary elastic displacement components 50 are respectively located on both sides of the elastic ejector pin 30, with corresponding second positioning grooves 122 and second positioning through holes 212 designed simultaneously, thus enabling the bridging component 20 to move synchronously and uniformly in all directions.

[0064] Optionally, the main circuit electrode 40 has a side-mounted "U"-shaped structure, with its top surface connected to the main circuit electrode 40. This design makes the installation of the main circuit electrode 40 more stable. Additionally, the base 120 is designed with a third positioning groove 123 that matches the shape of the main circuit electrode 40, and the main circuit electrode 40 is installed within the third positioning groove 123. This further enhances the stability of the main circuit electrode 40 installation and improves the overall assembly stability of the device.

[0065] The assembly process of the controlled thermoelectric cutter in Example 1 is as follows:

[0066] Solder paste is printed on the heating element 210 of the controlled hot melt cutter. The conductive component 220 and the fuse are assembled onto the heating element 210. The two components are then soldered together by reflow soldering to form a bridging component 20. The elastic ejector pin 30 is assembled into the first positioning groove 121 reserved on the base 120. The two auxiliary elastic displacement components 50 are respectively installed into the second positioning grooves 122 reserved on the bottom shell. The washers 510 are respectively installed onto the auxiliary elastic displacement components 50. The two second positioning through holes 212 on the heating element 210 (which has been soldered to the conductive component 220) are respectively fitted onto the washer 510, and one first through hole is fitted onto the top of the ejector pin to serve a positioning function. Hot melt 60 (in this embodiment, it is a fusible alloy solder, including but not limited to solder paste) is applied to the heating element 210. The two main circuit electrode components 40 are respectively installed into the third positioning groove 123 of the base 120. Then, the assembled heating element 210, hot melt 60, and main circuit electrode components 40 are soldered together by reflow soldering. Finally, cover the top shell 110 to seal it, and you have the product.

[0067] It should be noted that the telescopic head 310 can move within the inner cavity of the housing 320. For example, a built-in linear reciprocating elastic body (including but not limited to a built-in spring) is provided in the inner cavity, with one end abutting against the telescopic head 310 and the other end abutting against the inner cavity wall. The telescopic movement of the telescopic head 310 is achieved by the linear compression and rebound of the elastic body.

[0068] Example 2

[0069] like Figure 4-6 , Figure 10-13 , Figure 19 As shown: The controlled thermoelectric cutter provided in the embodiment includes a bridging member 20 disposed in the inner cavity of the housing 10, a conductive elastic pin 30, and two main circuit electrodes 40.

[0070] The two opposite ends of the bridging component 20 are respectively connected to the two main circuit electrode components 40 by a thermosetting component 60 (not shown in the structural diagram, see principle diagram for details). Figure 19 The bridging component 20 includes a heating element 210 for conducting heat to the heat-fused component 60 and a conductive component 220 for electrically connecting the two main circuit electrode components 40; the elastic pin 30 includes a telescopic head 310 and a sleeve 320 sleeved outside the telescopic head 310, the telescopic head 310 can elastically extend and retract within the cavity of the sleeve 320, and the outer peripheral surface of the telescopic head 310 is provided with an elastic element 330.

[0071] The bottom of the housing 320 is connected to the inner wall of the outer casing 10. The top of the telescopic head 310 is compressed and abuts against the heating element 210 of the bridging component 20. The telescopic head 310 is retracted within the inner cavity of the housing 320. The elastic element 330 is compressed and abuts between the outer peripheral surface of the telescopic head 310 and the inner wall of the housing 320. When the thermoplastic component 60 melts, the telescopic head 310 extends out of the inner cavity of the housing 320 to separate the bridging component 20 from the main circuit electrode 40. The elastic element 330 then springs back away from the outer peripheral surface of the telescopic head 310 and abuts against the top outer peripheral surface of the housing 320. In this embodiment, optionally, the conductive component 220 is an electrode sheet. Optionally, the thermoplastic component 60 is a heat-sensitive component, which is a fusible alloy solder.

[0072] Specifically, the working process and working principle of the controlled thermal melt cutter are the same as those in Embodiment 1. The bridging component 20 includes a conductive component 220, except that the conductive component 220 is an electrode sheet. When the main circuit is overloaded, the bridging component 20, which is used to conductively connect the two main circuit electrode components 40, is lifted by the elastic pin 30, so that the bridging component 20 is detached from the main circuit electrode component 40, and the main circuit is cut off.

[0073] Optionally, the telescopic head 310 has at least one pair of opposing elastic elements 330 on its outer peripheral surface, with the two elastic elements 330 located on opposite sides of the outer peripheral surface of the telescopic head 310. This design helps to improve the stability of the telescopic head 310 when it is supported and locked above the housing 320.

[0074] Optionally, the base 120 is provided with a first positioning groove 121 that matches the bottom of the housing 320, and the bottom of the housing 320 of the elastic ejector pin 30 is installed in the first positioning groove 121; the heating element 210 is provided with a first positioning through hole 211 that matches the top of the telescopic head 310, and the top of the telescopic head 310 is embedded in the first positioning through hole 211. Similarly, the design of the first positioning groove 121 and the first positioning through hole 211 improves the installation stability of the elastic ejector pin 30, so that when the elastic ejector pin 30 rebounds, the bridging member 20 will not slip off the top of the telescopic head 310, making the pushing action of the elastic ejector pin 30 on the bridging member 20 more accurate and stable.

[0075] Optionally, it also includes an auxiliary elastic displacement member 50; one end of the auxiliary elastic displacement member 50 is connected to the inner wall of the housing 10, and the other end is compressed against the heating element 210 of the bridging member 20, so that when the fusible link 60 melts, the auxiliary elastic displacement member 50 springs up to separate the bridging member 20 from the main circuit electrode 40. The auxiliary elastic displacement member 50 is an auxiliary spring. Similarly, through the design of the auxiliary mechanical displacement components, they work together to provide an upward thrust to the bridging member 20, allowing the bridging member 20 to separate from the two main circuit electrode 40, cutting off the circuit, improving the controlled melting effect of the device, and improving the insulation withstand voltage capability.

[0076] Optionally, the auxiliary elastic displacement member 50 is sleeved on the outside of the elastic ejector pin 30. This design makes the device space more compact, especially suitable for situations where the bridging member 20 has a relatively small area.

[0077] Optionally, the main circuit electrode 40 has a side-mounted "U"-shaped structure, with its top surface connected to the main circuit electrode 40. Additionally, the base 120 is designed with a third positioning groove 123 that matches the shape of the main circuit electrode 40, and the main circuit electrode 40 is installed within the third positioning groove 123. This further ensures a more stable installation of the main circuit electrode 40 and improves the overall assembly stability of the device.

[0078] The assembly process of the controlled thermoelectric cutter in Example 2 is as follows:

[0079] Solder paste is printed on the heating element 210 of the controlled hot melt cutter. The electrode sheet of the conductive component 220 is assembled onto the heating element 210. The two components are soldered together by reflow soldering to form a bridging component 20. The conductive component 220 is soldered to the two main circuit electrode components 40 respectively through the hot melt component 60 (in this embodiment, it is a fusible alloy solder, including but not limited to solder paste solder). The elastic ejector pin 30 is assembled into the first positioning groove 121 reserved on the base 120, and the auxiliary elastic displacement component 50 is sleeved on the elastic ejector pin 30. A first through hole on the heating element 210 (already soldered to the conductive component 220) is fitted onto the top of the ejector pin for positioning. The two main circuit electrode components 40 are respectively installed into the third positioning groove 123 of the base 120. Then, the assembled heating element 210, hot melt component 60, and main circuit electrode components 40 are soldered together by reflow soldering. Finally, the upper shell 110 is closed for sealing, and the product is obtained.

[0080] Example 3

[0081] like Figure 7-9 , Figure 10-13 , Figure 19 As shown: The controlled thermoelectric cutter provided in the embodiment includes a bridging member 20 disposed in the inner cavity of the housing 10, a conductive elastic pin 30, and two main circuit electrodes 40.

[0082] The two opposite ends of the bridging component 20 are respectively connected to the two main circuit electrode components 40 by a thermosetting component 60 (not shown in the structural diagram, see principle diagram for details). Figure 19 The bridging component 20 includes a heating element 210 for conducting heat to the heat-fused component 60 and a conductive component 220 for electrically connecting the two main circuit electrode components 40; the elastic pin 30 includes a telescopic head 310 and a sleeve 320 sleeved outside the telescopic head 310, the telescopic head 310 can elastically extend and retract within the cavity of the sleeve 320, and the outer peripheral surface of the telescopic head 310 is provided with an elastic element 330.

[0083] The bottom of the housing 320 is connected to the inner wall of the outer casing 10. The top of the telescopic head 310 is compressed and abuts against the heating element 210 of the bridging component 20. The telescopic head 310 is retracted within the inner cavity of the housing 320. The elastic element 330 is compressed and abuts between the outer peripheral surface of the telescopic head 310 and the inner wall of the housing 320. When the thermoplastic component 60 melts, the telescopic head 310 extends out of the inner cavity of the housing 320 to separate the bridging component 20 from the main circuit electrode 40. The elastic element 330 then springs back away from the outer peripheral surface of the telescopic head 310 and abuts against the top outer peripheral surface of the housing 320. Optionally, in this embodiment, the bridging component 20 includes a conductive component 220, which is a fusible alloy. The thermoplastic component 60 is a heat-sensitive component, which is a fusible alloy solder.

[0084] Optionally, the conductive component 220 fusible alloy has an N-type structure, which can lengthen the arc path and improve the arc extinguishing effect when the main circuit is disconnected.

[0085] Optionally, the conductive component 220 is provided with through holes in the fusible alloy to form a narrow diameter and improve the melting speed.

[0086] Specifically, the working process and principle of the controlled thermal melt cutter are the same as in Embodiment 1, except that the conductive component 220 is a fusible alloy. When the main circuit is overloaded, the conductive component 220, which is used to conductively connect the two main circuit electrode components 40, melts and cuts off the main circuit. Alternatively, the fusible alloy may also be provided with a flux 230 to facilitate rapid melting of the fusible alloy.

[0087] Optionally, the telescopic head 310 has two opposing elastic elements 330 on its outer peripheral surface, with the two elastic elements 330 located on both sides of the outer peripheral surface of the telescopic head 310. This design helps to improve the stability of the telescopic head 310 when it is supported and locked above the housing 320.

[0088] Optionally, the base 120 is provided with a first positioning groove 121 that matches the bottom of the housing 320, and the bottom of the housing 320 of the elastic ejector pin 30 is installed in the first positioning groove 121; the heating element 210 is provided with a first positioning through hole 211 that matches the top of the telescopic head 310, and the top of the telescopic head 310 is embedded in the first positioning through hole 211. Similarly, the design of the first positioning groove 121 and the first positioning through hole 211 improves the installation stability of the elastic ejector pin 30, so that when the elastic ejector pin 30 rebounds, the bridging member 20 will not slip off the top of the telescopic head 310, making the pushing action of the elastic ejector pin 30 on the bridging member 20 more accurate and stable.

[0089] Optionally, it also includes an auxiliary elastic displacement member 50; one end of the auxiliary elastic displacement member 50 is connected to the inner wall of the housing 10, and the other end is compressed against the heating element 210 of the bridging member 20, so that when the fusible link 60 melts, the auxiliary elastic displacement member 50 springs up to separate the bridging member 20 from the main circuit electrode 40. The auxiliary elastic displacement member 50 is an auxiliary spring. Similarly, through the design of the auxiliary mechanical displacement components, they work together to provide an upward thrust to the bridging member 20, allowing the bridging member 20 to separate from the two main circuit electrode 40, cutting off the circuit, improving the controlled melting effect of the device, and improving the insulation withstand voltage capability.

[0090] Optionally, the auxiliary elastic displacement component 50 is arranged independently of the elastic ejector pin 30; the base 120 is provided with a second positioning groove 122 that matches the bottom of the auxiliary elastic displacement component 50, and the auxiliary elastic displacement component 50 is installed in the second positioning groove 122. A washer 510 is provided on the top of the elastic displacement component, and a second positioning through hole 212 that matches the washer 510 is provided on the heating element 210, with the top of the elastic displacement component embedded in the second positioning through hole 212. Similarly, this design can improve the installation stability of the auxiliary elastic displacement component 50, making the pushing action of the elastic displacement component on the bridging component 20 more accurate and stable. Optionally, in this embodiment, two auxiliary elastic displacement components 50 are respectively located on both sides of the elastic ejector pin 30, with corresponding second positioning grooves 122 and second positioning through holes 212 designed simultaneously, so that the bridging component 20 is moved synchronously and uniformly in all directions.

[0091] Optionally, the main circuit electrode 40 has a side-mounted "U"-shaped structure, with its top surface connected to the main circuit electrode 40. Additionally, the base 120 is designed with a third positioning groove 123 that matches the shape of the main circuit electrode 40, and the main circuit electrode 40 is installed within the third positioning groove 123. This further ensures a more stable installation of the main circuit electrode 40 and improves the overall assembly stability of the device.

[0092] The assembly process of the controlled thermoelectric cutter in Example 3 is as follows:

[0093] Solder paste is printed on the heating element 210 of the controlled hot melt cutter. The conductive component 220 is assembled onto the heating element 210 using a fusible alloy. The two components are then soldered together by reflow soldering to form a bridging component 20. The elastic ejector pin 30 is assembled into the first positioning groove 121 reserved on the base 120. The two auxiliary elastic displacement components 50 are respectively installed into the second positioning grooves 122 reserved on the bottom shell. The washers 510 are respectively installed onto the auxiliary elastic displacement components 50. The two second positioning through holes 212 on the heating element 210 (which has been soldered to the conductive component 220) are respectively fitted onto the washer 510, and a first through hole is fitted onto the top of the ejector pin to serve a positioning function. Hot melt 60 (in this embodiment, it is a fusible alloy solder, including but not limited to solder paste) is applied to the heating element 210. The two main circuit electrode components 40 are respectively installed into the third positioning groove 123 of the base 120. Then, the assembled heating element 210, hot melt 60, and main circuit electrode components 40 are soldered together by reflow soldering. Apply flux 230 to the fusible alloy, and finally cover it with the upper shell 110 to achieve a sealing effect.

[0094] Furthermore, the design of the elastic element 330 on the telescopic head 310 to prevent the telescopic head 310 from falling back can be further optimized in the following ways, as shown in Examples 4-5:

[0095] As shown in Embodiment 4 (Figures 14-15): Optionally, a collar 340 is fitted on the outer peripheral surface of the telescopic head 310, and the elastic element 330 is provided on the collar 340; the outer diameter of the collar 340 is smaller than the inner diameter of the inner cavity of the housing 320, so that when the telescopic head 310 is retracted into the inner cavity of the housing 320, the collar 340 is located between the outer peripheral surface of the telescopic head 310 and the inner wall surface of the housing 320, and the elastic element 330 is compressed and abuts against the outer peripheral surface of the telescopic head 310 and the inner wall surface of the housing 320; when the telescopic head 310 extends out of the inner cavity of the housing 320, the elastic element 330 bounces up away from the outer peripheral surface of the telescopic head 310 and abuts against the top outer peripheral surface of the housing 320, thereby limiting the telescopic head 310 from falling further down and supporting the falling bridging member 20 to prevent the bridging member 20 from reconnecting with the main circuit electrode.

[0096] like Figure 10-13 In embodiments 1-3, where the elastic element 330 is directly connected to the elastic ejector pin 30, one side of the elastic element 330 needs to be fixed to the elastic ejector pin 30 by welding or other methods, which carries a certain risk of detachment. Therefore, in embodiment 4, the elastic element 330 is fixed to the outer peripheral surface of the elastic ejector pin 30 by a collar 340, resulting in a better overall fixation effect.

[0097] Additionally, as shown in Example 5 (Figures 16-18):

[0098] Based on the solution of embodiment 4, in order to secure the installation of the collar 340, optionally, the collar 340 is provided with a fixing hole 341, and the outer peripheral surface of the telescopic head 310 is provided with a fixing protrusion 311 that matches the fixing hole 341, so that the fixing protrusion 311 is engaged in the fixing hole 341, thereby further ensuring the stability of the elastic element 330.

[0099] It should be noted that:

[0100] When this application is implemented, the conductive component 220 is not limited to traditional fusible alloys, and may also use, but is not limited to, components with the same function such as electrode sheets and fuses as conductive conductors.

[0101] In embodiments 1-3 above, the auxiliary elastic displacement member 50 is a spring. Based on the above design concept, those skilled in the art can also select other elastic bodies with similar linear telescopic rebound function, including but not limited to springs.

[0102] In embodiments 1-3 above, the hot melt component 60 is a heat-sensitive fusible alloy, specifically solder paste. Based on the above design concept, those skilled in the art can also select other substances or components with similar heat-sensitive melting and welding functions, including but not limited to the embodiments.

[0103] In embodiments 1-3 above, two elastic elements 330 are respectively disposed on both sides of the telescopic head 310. According to the above design concept, the outer peripheral surface of the telescopic head 310 preferably has at least one pair of oppositely disposed elastic elements 330. Based on the embodiment scheme, multiple pairs of oppositely disposed elastic elements 330 can be further added to further prevent the telescopic head 310 from falling back.

[0104] In embodiments 1 and 3 above, a pair of auxiliary elastic displacement members 50 are respectively located on both sides of the elastic ejector pin 30. According to the above design concept, it is preferable to have at least one pair of oppositely arranged auxiliary elastic displacement members 50. Based on the embodiment scheme, if the overall area of ​​the heating element 210 is large, in order to improve the pushing stability and uniformity, multiple auxiliary elastic displacement members 50 can be further added to the outer periphery of the elastic ejector pin 30. If the overall area of ​​the heating element 210 is small, it is preferable to have the auxiliary elastic displacement members 50 fitted outside the elastic ejector pin 30 to solve the space problem.

[0105] In embodiments 1 and 3 above, the main circuit electrode 40 is a side-mounted "U"-shaped structure. Based on the above design concept, those skilled in the art can also select other main circuit electrode 40s with similar shapes, including but not limited to "I"-shaped structures.

[0106] In summary, the controlled thermoelectric cutter provided in this application has the following beneficial effects:

[0107] This application utilizes the cooperation of a flexible ejector pin 30, a bridging component 20, and two main circuit electrode components 40. When overcharging occurs, the thermoplastic component 60 melts, causing the telescopic head 310 of the flexible ejector pin 30 to extend. This, combined with an auxiliary elastic displacement component, pushes the bridging component 20 to spring up rapidly, separating it from the main circuit electrode and cutting off the main circuit, thereby disconnecting the heating circuit. Simultaneously, the telescopic head 310 of the flexible ejector pin 30 is equipped with an elastic component 330 to prevent the extended pin 30 from falling back into the sleeve cavity due to gravity, effectively preventing the bridging component 20 from falling back onto the main circuit electrode components 40 and causing the circuit to be mistakenly reconnected. Through this design, the device's melting and circuit-breaking time is shortened, ensuring complete circuit breaking reliability, improving the stability and reliability of the device's circuit-breaking capability, enhancing the device's insulation withstand voltage capability, and ensuring the operational reliability of the controlled thermoplastic cutter.

[0108] This application also includes an auxiliary elastic displacement component 50, which can increase the applied force to assist the bridging component 20 in quickly springing up. At the same time, it plays a multiple protection role, preventing the device from failing to disconnect properly due to abnormality of either the auxiliary elastic displacement component 50 or the elastic pin 30. This improves the sensitivity and performance stability of the device, increases the device's disconnection time, and enhances the device's insulation withstand voltage capability.

[0109] This application uses a variety of conductive components 220 to conduct the circuit, thereby improving the product's overcurrent capability and breaking capability.

[0110] This application uses a bridging element 20 formed by a heating element 210 and a conductive component 220. The design of connecting two main circuit electrode components 40 through the bridging element 20 can improve the device's overcurrent, current breaking capacity, and current pulse resistance.

[0111] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this application can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A controlled hot melt disconnector, characterized by: Includes a bridging component (20), an elastic ejector pin (30), and two main circuit electrode components (40) disposed in the inner cavity of the housing (10). At least one end of the bridging component (20) is electrically connected to two main circuit electrode components (40) via a thermoplastic component (60). One end of the elastic ejector pin (30) is disposed on the inner wall surface of the outer shell (10), and the other end abuts against the bridging member (20); the elastic ejector pin (30) includes a telescopic head (310) and a sleeve (320) sleeved on the outside of the telescopic head (310), and the sleeve (320) has an inner cavity for the telescopic head (310) to move; The telescopic head (310) is provided with an elastic element (330) on its outer peripheral surface; one end of the elastic element (330) is fixed to the outer peripheral surface of the telescopic head (310), and the other end is a free end. The free end is inserted between the outer peripheral surface of the telescopic head (310) and the inner wall surface of the casing (320) in a compressed manner, so that when the thermoplastic component (60) melts, the telescopic head (310) moves upward, and the elastic element (330) bounces away from the outer peripheral surface of the telescopic head (310) and abuts against the top outer peripheral surface of the casing (320).

2. The controlled thermofusion sealer according to claim 1, wherein: The bridging component (20) further includes a heating element (210); the heating element (210) is the lower surface of the bridging component (20), and the elastic pin (30) abuts against the heating element (210) and is electrically connected to the heating element (210); It also includes an auxiliary elastic displacement member (50); one end of the auxiliary elastic displacement member (50) is connected to the inner wall of the outer shell (10), and the other end is compressed against the heating element (210) of the bridging member (20) so that when the hot melt (60) melts, the auxiliary elastic displacement member (50) springs up to separate the bridging member (20) from the main circuit electrode (40).

3. The controlled thermofusion sealer of claim 1, wherein: The telescopic head (310) is fitted with a collar (340) on its outer peripheral surface, and the elastic element (330) is provided on the collar (340). The outer diameter of the collar (340) is smaller than the inner diameter of the inner cavity of the housing (320). When the telescopic head (310) is retracted into the inner cavity of the housing (320), the collar (340) is located between the outer peripheral surface of the telescopic head (310) and the inner wall surface of the housing (320), and the elastic element (330) is compressed and abuts against the outer peripheral surface of the telescopic head (310) and the inner wall surface of the housing (320). When the telescopic head (310) extends out of the inner cavity of the housing (320), the elastic element (330) bounces away from the outer peripheral surface of the telescopic head (310) and abuts against the top outer peripheral surface of the housing (320).

4. The controlled thermofusion sealer of claim 3, wherein: The collar (340) is provided with a fixing hole (341), and the outer peripheral surface of the telescopic head (310) is provided with a fixing protrusion (311) that matches the fixing hole (341), so that the fixing protrusion (311) is fitted into the fixing hole (341).

5. The controlled thermofusion sealer according to any one of claims 1-4, characterized in that: The telescopic head (310) has at least one pair of opposing elastic elements (330) on its outer peripheral surface, with the two elastic elements (330) located on both sides of the outer peripheral surface of the telescopic head (310).

6. The controlled thermofusion sealer of claim 2, wherein: The outer casing (10) includes an upper casing (110) and a base (120); The base (120) is provided with a first positioning groove (121) that matches the bottom of the housing (320), and the bottom of the housing (320) of the elastic pin (30) is installed in the first positioning groove (121); The heating element (210) is provided with a first positioning through hole (211) that matches the top of the telescopic head (310), and the top of the telescopic head (310) is embedded in the first positioning through hole (211).

7. The controlled thermofusion sealer of claim 2, wherein: The outer casing (10) includes an upper casing (110) and a base (120); The base (120) is provided with a second positioning groove (122) that matches the bottom of the auxiliary elastic displacement member (50), and the auxiliary elastic displacement member (50) is installed in the second positioning groove (122).

8. The controlled thermoelectric cutter according to claim 7, characterized in that: The elastic displacement member is provided with a washer (510) at the top, and the heating element (210) is provided with a second positioning through hole (212) that matches the washer (510). The top of the elastic displacement member is embedded in the second positioning through hole (212).

9. The controlled thermoelectric cutter according to claim 2, characterized in that: The auxiliary elastic displacement member (50) is sleeved on the outside of the elastic pin (30), and / or the auxiliary elastic displacement member (50) is arranged independently of the elastic pin (30); The main circuit electrode (40) is a side-mounted "U"-shaped structure or an "I"-shaped structure, and its top surface is connected to the main circuit electrode (40).

10. The controlled thermofusion sealer of claim 2, wherein: The auxiliary elastic displacement component (50) is an auxiliary spring; The bridging component (20) includes one of a fusible alloy, an electrode sheet, and a fuse; The hot melt component (60) is a heat-sensitive component, which is a fusible alloy solder.

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