Double-insurance temperature protector

Abstract

The utility model discloses a double-insurance temperature protector, which comprises a temperature protector body, the temperature protector body is connected with a first lead-out wire and a second lead-out wire, the second lead-out wire is connected with a temperature fuse in series, and two ends of the temperature fuse are respectively provided with leads; the lead wires are respectively connected with the second lead-out wire through the corresponding connectors, each connector comprises a conductive rod body, one end of each conductive rod body is correspondingly connected with the end part of the second lead-out wire, at least two clamping jaws are formed at the corresponding other end of each conductive rod body, an outer conical surface is formed on each conductive rod body, and the outer conical surfaces are positioned on the outer sides of the end parts of the clamping jaws; the conductive rod body is in threaded connection with a nut, one end of the nut is provided with a pushing inner conical surface, the inner conical surface abuts against and is connected with the outer conical surface, and the clamping jaws clamp the corresponding leads. The double-insurance temperature protector provided by the utility model is convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of temperature protectors, specifically to a double-protection temperature protector. Background Technology

[0002] Currently, temperature protectors employ a bimetallic strip structure. When the temperature protector heats up to its operating temperature, the bimetallic strip snaps, disconnecting the circuit. When the temperature protector cools down to its reset temperature, the bimetallic strip resets, reconnecting the circuit. An example of the structure of existing temperature protectors can be found in Chinese Utility Model Patent Publication No. CN213025943U, titled "Temperature Protector." However, because the circuit reconnects when the temperature protector cools down to its reset temperature, in some special cases, although the temperature has decreased, the dangerous situation may not have been eliminated. If the temperature protector reconnects the circuit, it will create a safety hazard. Therefore, existing technology incorporates a temperature protector and a temperature fuse. Combined devices, such as the "Temperature Fuse with Dual Protection Function" in Chinese Utility Model Patent Publication No. CN203300549U, have a one-time temperature fuse and a resettable fuse housed inside an insulating shell. When the one-time temperature fuse blows, the insulating shell is not easy to disassemble, making it inconvenient for product repair and reuse, resulting in the entire temperature fuse product needing to be scrapped, which is wasteful. With the increasingly widespread use of electrical products in society, some electrical product components may be recyclable or repairable. If temperature protectors can be recycled and reused, it is a good way to save resources for the environment and society. Therefore, it is necessary to improve the existing devices that combine temperature protectors and temperature fuses. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a double-protected temperature protector that is easy to maintain.

[0004] The objective of this utility model is achieved through the following technical solution.

[0005] This utility model discloses a dual-protection temperature protector, comprising a temperature protector body connected to a first lead wire and a second lead wire. A temperature fuse is connected in series to the second lead wire, and leads are respectively provided at both ends of the temperature fuse. It also includes connectors, with each lead wire connected to the second lead wire via a corresponding connector. Each connector includes a conductive rod, one end of which is connected to the end of the second lead wire, and the other end of which has at least two clamping jaws. The conductive rod has an outer conical surface located outside the ends of the clamping jaws. A nut is screwed onto the conductive rod, and one end of the nut has a pushing inner conical surface that abuts against the outer conical surface. The clamping jaws clamp the corresponding leads.

[0006] Preferably, the gripper forms a clamping hole, and a guiding inner conical surface is formed at the opening of the clamping hole.

[0007] Preferably, the clamping hole has a bottom, and the guide inner cone surface has a retaining tooth at one end near the bottom of the hole for contacting the lead wire.

[0008] Preferably, the conductive rod has a fixed insertion hole, the end of the second lead wire is conductively inserted into the fixed insertion hole, and a solder window is formed on the conductive rod, the solder window being radially connected to the fixed insertion hole.

[0009] Preferably, the dual-protection temperature protector of this utility model further includes an insulating heat shrink tubing, and the temperature fuse and the connector are disposed inside the insulating heat shrink tubing.

[0010] Compared with the prior art, the advantages of this utility model are as follows: by setting the leads to be connected to the second lead wires through corresponding connectors, the connectors include conductive rods, one end of which is connected to the end of the second lead wire, and the other end of the conductive rod has at least two jaws. The conductive rod has an outer conical surface located outside the end of the jaws. A nut is screwed onto the conductive rod, and one end of the nut has a pushing inner conical surface, which is attached to the outer conical surface. The jaws clamp the corresponding leads, making the temperature fuse easy to install and remove, thus making the double-protection temperature protector of this utility model easy to maintain. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the dual-protection temperature protector of this utility model.

[0012] Figure 2 for Figure 1 A partial structural diagram.

[0013] Figure 3This is a cross-sectional view of the conductive rod of this utility model.

[0014] Figure 4 This is a cross-sectional view of the nut of this utility model.

[0015] Labeling: Temperature protector body 1; First lead wire 11; First spring terminal 111; Second lead wire 12; Second spring terminal 121; First bare wire end 1201; Second bare wire end 1202; Temperature fuse 2; Lead wire 21; Insulating heat shrink tubing 5; Connector 6; Conductive rod 60; Fixed socket 61; Solder window 611; Clamping hole 62; Hole bottom 620; Cut 6201; Clamping claw 621; Outer conical surface 6211; Guide inner conical surface 6212; Clamping tooth 6213; Nut 600; Internal thread part 6001; Pushing inner conical surface 6002; Solder 99. Detailed Implementation

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] This utility model provides a dual-protection temperature protector, such as... Figure 1 and Figure 2 As shown, the device includes a temperature protector body 1, which is connected to a first lead wire 11 and a second lead wire 12. The temperature protector body 1 is prior art; for example, refer to the "Temperature Protector" in Chinese Utility Model Patent Publication No. CN213025943U. A temperature fuse 2 is connected in series on the second lead wire 12. Lead wires 21 are provided at both ends of the temperature fuse 2. The temperature fuse 2 is prior art; for example, refer to the "Thermosensitive Particle Type Temperature Fuse" in Chinese Invention Patent Publication No. CN1855339B. Figure 1 As shown, the dual-protection temperature protector of this utility model also includes a connector 6. Leads 21 are respectively connected to the second lead wire 12 via corresponding connectors 6. Specifically, in order to connect the temperature fuse 2 in series on the second lead wire 12, the second lead wire 12 is essentially cut, forming a first bare wire end 1201 and a second bare wire end 1202 on both sides of the cut end of the second lead wire 12. Therefore, in Figure 1 From a visual perspective, the lead 21 located at the upper position is electrically connected to the first bare wire end 1201 via a connector 6 located at the upper position, and the lead 21 located at the lower position is electrically connected to the second bare wire end 1202 via a connector 6 located at the lower position. For example... Figure 2 As shown, connector 6 includes a conductive rod 60, one end of which is connected to the end of the second lead wire 12. The end of the second lead wire 12 is either the first bare wire head 1201 or the second bare wire head 1202. Figure 2The example shows the first bare wire end 1201 connecting to the corresponding connector 6; for example... Figure 3 As shown, at least two grippers 621 are formed at the other end of the conductive rod 60. Figure 3 An example illustrates a case where two grippers 621 are formed at the opposite end of the conductive rod 60. The conductive rod 60 has an outer conical surface 6211, which is located outside the ends of the grippers 621. Specifically, in Figure 2 From a visual perspective, the upper end of the gripper 621 is integrally connected to the conductive rod 60. The outer conical surface 6211 is located on the outer side of the lower end of the gripper 621. The conductive rod 60 is roughly cylindrical, so the outer conical surface 6211 and the conductive rod 60 are coaxially aligned. A slit 6201 is formed at the other end of the conductive rod 60. The slit 6201 penetrates the conductive rod 60 on one side along a direction parallel to the axis of the conductive rod 60. That is, in the circumferential direction of the conductive rod 60, the slit 6201 is located between adjacent grippers 621. Figure 2 As shown, a nut 600 is screwed onto the conductive rod 60. The nut 600 and the conductive rod 60 are coaxially aligned. Figure 4 As shown, one end of the nut 600 has a pushing inner conical surface 6002, and the corresponding other end of the nut 600 has an internal thread portion 6001, specifically, the internal thread portion 6001 connects to the external thread on the conductive rod body 60. Figure 2 As shown, the inner conical surface 6002 is attached to the outer conical surface 6211. Figure 2 From a visual perspective, the upper outer diameter of the outer conical surface 6211 is larger than the lower outer diameter of the outer conical surface 6211, and the upper inner diameter of the extruding inner conical surface 6002 is larger than the lower inner diameter of the extruding inner conical surface 6002, as shown below. Figure 2 As shown, the jaws 621 clamp the corresponding lead wire 21. When the number of jaws 621 is set to two, it means that the lead wire 21 is inserted between the two jaws 621.

[0018] During the assembly of the dual-protection temperature protector of this utility model, such as Figure 1As shown, the lead 21 located in the upper position is inserted between the two jaws 621 of the connector 6 located in the upper position. Then, the nut 600 is rotated so that the nut 600 moves upward relative to the conductive rod 60. This pushes the inner conical surface 6002 upward, and pushes the outer conical surface 6211, causing the jaws 621 to close inward, thus clamping the lead 21 located in the upper position. Similarly, the lead 21 located in the lower position is inserted between the two jaws 621 of the connector 6 located in the lower position, and the nut 600 of the connector 6 located in the lower position is tightened. This allows the connector 6 located in the lower position to reliably conduct electricity with the lead 21 located in the lower position. The above operation of installing the temperature fuse 2 is simple and convenient. When it is necessary to disassemble the temperature fuse 2, loosen the nut 600, and then pull the lead wire 21 away from the connector 6. The disassembly process is simple, and the disassembly of the temperature fuse 2 will not cause damage to the temperature protector body 1 or the second lead wire 12. When replacing the temperature fuse 2, install the temperature fuse 2 onto the second lead wire 12 according to the above operation. Therefore, the double-safety temperature protector of this utility model is convenient for maintenance. After long-term use, users may discard the appliance or send it to a recycling point. Technicians can recycle and reuse the double-safety temperature protector of this utility model. If only the temperature fuse 2 has blown, a new temperature fuse 2 can be quickly replaced, so that the double-safety temperature protector can be reused, which is beneficial to saving resources and environmental protection.

[0019] Furthermore, such as Figure 3 As shown, the gripper 621 forms a clamping hole 62, so the clamping hole 62 and the conductive rod body 60 are coaxially arranged, and the slit 6201 penetrates the clamping hole 62. A guiding inner conical surface 6212 is formed at the opening of the clamping hole 62. The guiding inner conical surface 6212 is used to guide the lead wire 21 into the clamping hole 62, that is to say, in Figure 2 and Figure 3 From a visual perspective, the lower inner diameter of the inner conical surface 6212 is larger than the upper inner diameter of the inner conical surface 6212, which is equivalent to setting the opening of the clamping hole 62 as a flared mouth. This makes it easier to insert the lead wire 21 into the clamping hole 62 during the process of inserting the lead wire 21 into the clamping hole 62.

[0020] Furthermore, such as Figure 3 As shown, the clamping hole 62 has a bottom 620, and the guide inner conical surface 6212 has a retaining tooth 6213 for contacting the lead wire 21 at one end near the bottom 620. Figure 3 From a visual perspective, that is to say, the upper end of the inner conical surface 6212 has an inwardly protruding retaining tooth 6213, such as Figure 2As shown, after inserting the lead wire 21 into the clamping hole 62, when the nut 600 is turned to retract the clamping jaws 621, the locking teeth 6213 can press against the outer cylindrical surface of the lead wire 21. This allows the locking teeth 6213 to slightly concave the surface of the lead wire 21, resulting in good conductive contact between the connector 6 and the lead wire 21. This provides stronger resistance when the lead wire 21 moves axially relative to the conductive rod 60, thus preventing the lead wire 21 from being easily pulled axially away from the clamping hole 62. When it is necessary to disassemble the temperature fuse 2, first loosen the nut 600 to push the inner conical surface 6002 away from the outer conical surface 6211. Then pull the lead wire 21 away from the connector 6. At this time, since the lower end of the clamping jaws 621 swings outward along the radial direction of the conductive rod 60 without being obstructed by the inner conical surface 6002, the locking teeth 6213 have already released the lead wire 21 when it is pulled away from the connector 6.

[0021] Furthermore, such as Figure 3 As shown, the conductive rod 60 has a fixed insertion hole 61. The end of the second lead wire 12 is conductively inserted into the fixed insertion hole 61. That is, the fixed insertion hole 61 is located at one end of the conductive rod 60. A solder window 611 is formed on the conductive rod 60. The solder window 611 is radially (that is, along the radial direction of the conductive rod 60) connected to the fixed insertion hole 61. Through the above arrangement, for example, as... Figure 2 As shown, the first bare wire end 1201 is inserted into the fixed socket 61, and then the first bare wire end 1201 is soldered to the conductive rod body 60 through the solder window 611. That is to say, the solder window 611 can relatively fix and accommodate the solder 99, so as to facilitate the secure soldering of the first bare wire end 1201 to the conductive rod body 60.

[0022] Furthermore, such as Figure 1 As shown, the dual-protection temperature protector of this utility model also includes an insulating heat shrink tubing 5. The insulating heat shrink tubing 5 is a prior art. For an example of the insulating heat shrink tubing 5, please refer to the "Heat Shrink Tubing" in Chinese Utility Model Patent Publication No. CN202868279U. The temperature fuse 2 and the connector 6 are disposed inside the insulating heat shrink tubing 5. Before installing the temperature fuse 2 to the second lead wire 12, the second lead wire 12 is first inserted into the insulating heat shrink tubing 5. Then, the temperature fuse 2 is installed. After that, the insulating heat shrink tubing 5 is slid so that the insulating heat shrink tubing 5 is wrapped around the temperature fuse 2 and the connector 6. The insulating heat shrink tubing 5 is heated so that the insulating heat shrink tubing 5 shrinks and wraps around the temperature fuse 2 and the connector 6. The insulating heat shrink tubing 5 can be made of polyvinyl chloride (PVC), with a shrinkage temperature of approximately 100°C to 120°C. The thermal fuse 2 can be a model with a melting temperature of approximately 180°C, and the operating temperature of the thermal protector body 1 can be set to approximately 103°C. Figure 1As shown, the lower end of the first lead wire 11 is provided with a first spring terminal 111, and the lower end of the second lead wire 12 is provided with a second spring terminal 121. The first spring terminal 111 and the second spring terminal 121 can be referred to "An Anti-Disengagement Spring Terminal" in Chinese Utility Model Patent Publication No. CN216413331U. When an unexpected situation (such as an electrical fire) causes the temperature to exceed the melting temperature of the thermal fuse 2, the thermal fuse 2 melts and reliably disconnects the circuit, preventing the thermal protector body 1 from resetting before the dangerous situation is resolved and causing the circuit to be connected again, thus achieving a double insurance effect.

Claims

1. A double insurance temperature protector, comprising a temperature protector body (1) connected with a first lead-out wire (11) and a second lead-out wire (12), characterized in that: A temperature fuse (2) is connected in series on the second lead wire (12), and leads (21) are respectively provided at both ends of the temperature fuse (2); it also includes a connector (6), and the leads (21) are respectively connected to the second lead wire (12) through the corresponding connector (6). The connector (6) includes a conductive rod (60), one end of the conductive rod (60) is connected to the end of the second lead wire (12), and the other end of the conductive rod (60) is connected to the other end of the conductive rod (60). The conductive rod (60) has at least two grippers (621), and an outer conical surface (6211) is formed on the outer side of the end of the gripper (621). The conductive rod (60) is screwed with a nut (600), and one end of the nut (600) has a pushing inner conical surface (6002). The inner conical surface (6002) is attached to the outer conical surface (6211), and the gripper (621) clamps the corresponding lead wire (21).

2. The dual protection temperature protector according to claim 1, wherein: The gripper (621) forms a clamping hole (62), and a guide inner conical surface (6212) is formed at the opening of the clamping hole (62).

3. The dual protection temperature protector of claim 2, wherein: The clamping hole (62) has a bottom (620), and the guide inner cone surface (6212) has a retaining tooth (6213) for contacting the lead wire (21) at one end relative to the bottom (620).

4. The dual protection temperature protector of claim 1, wherein: The conductive rod (60) has a fixed socket (61), and the end of the second lead wire (12) is electrically inserted into the fixed socket (61). A solder window (611) is formed on the conductive rod (60), and the solder window (611) is radially connected to the fixed socket (61).

5. The dual protection temperature protector of claim 1, wherein: It also includes an insulating heat shrink tubing (5), the temperature fuse (2) and the connector (6) are disposed inside the insulating heat shrink tubing (5).

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