Fusing type plug based on temperature signal feedback

Abstract

The invention discloses a fusing type plug based on temperature signal feedback, which comprises a plug pin and a power line connected in series with the plug pin, a bottom shell is provided with a through hole for the plug pin to pass through, the plug pin is connected to a plug pin inner frame, and the plug pin inner frame is connected in the bottom shell through an inner frame buckle; a heat conduction piece is arranged above the bolt inner frame, a temperature sensor is arranged between the heat conduction piece and the bolt inner frame, and the temperature of the live wire bolt is transmitted to the temperature sensor through the heat conduction piece; the heat conduction piece is composed of a bolt heat conduction piece and a fuse clamping groove, an opening of the fuse clamping groove faces the top of the bottom shell, the fuse connected with the live wire in series is arranged in the fuse clamping groove, the temperature of the fuse is transmitted to the temperature sensor through the heat conduction piece, a pressure cover is arranged above the bolt heat conduction piece, and the pressure cover is connected into the bottom shell through a pressure cover buckle. The plug has the advantages of safety monitoring of dual temperature monitoring and convenient maintenance. The temperature sensor is arranged between the heat conduction piece and the bolt inner frame, and the whole heat conduction structure is pressed through the detachable pressure cover on the upper portion, so that it is guaranteed that heat is efficiently and accurately transmitted to the sensor, more importantly, the maintenance convenience that the core can be achieved after the cover is opened is achieved, and meanwhile it is guaranteed that internal assemblies are tightly connected and work stably.

Description

Technical Field

[0001] The invention relates to a fusible plug based on temperature signal feedback, belonging to the technical field of plugs. Background Art

[0002] Power cords are widely used in our daily lives. They are used in a wide variety of industries, large and small. Almost anywhere electricity is used, there are power cords. Therefore, power cords are ubiquitous in our lives and are indispensable to our daily lives. Demand for all kinds of electrical appliances is increasing, especially for new energy vehicles that require charging. This generates significant heat, posing a significant safety hazard. A temperature switch is often installed inside the plug to monitor the plug's temperature in real time. The accuracy of the signal provided by the temperature switch is crucial.

[0003] For example, the Chinese patent with authorization announcement number CN 205509163 U discloses a temperature protection plug and a temperature protection appliance, which has a temperature switch inside the plug. The temperature switch is located in the accommodation space between the U-shaped plate and the side plate, so as to prevent fire and other damage caused by heat through the temperature switch. However, the temperature switch is set in an independent accommodation space and is not in direct contact with the plug, which will result in insufficient temperature sensitivity and inability to detect the overheating of the plug in time; if the temperature switch is in direct contact with the plug, the temperature range of the plug will fluctuate greatly, and high temperature will be generated in an instant, causing the circuit to be disconnected. However, the instantaneous high temperature does not mean that a safety accident will occur immediately. Only when the high temperature is maintained for a long time will spontaneous combustion occur. In addition, only a temperature switch is used inside the plug, which has a single function and cannot effectively provide overload protection. Summary of the Invention

[0004] The present invention aims to provide a fusible plug based on temperature signal feedback. The principle behind this design is that a temperature sensor and a fuse are built into the plug. When the temperature exceeds a threshold, the power supply is disconnected based on the temperature sensor signal. When the current exceeds the specified limit, the fuse automatically blows to protect the circuit. Furthermore, a thermally conductive element transmits the plug pin and fuse temperatures to the temperature sensor, enabling it to effectively sense abnormal plug temperatures, reducing the impact of transient high temperatures and providing timely temperature and overload protection.

[0005] In order to achieve the above technical purpose, the technical solution of the present invention is:

[0006] A fusible plug based on temperature signal feedback comprises a plug and a power cord connected in series with the plug, wherein the plug is arranged at the bottom of a base shell, the base shell is provided with a through hole for the plug to pass through, the plug is connected to a plug inner frame, and the plug inner frame is connected to the base shell via an inner frame buckle; a heat conductor is arranged above the plug inner frame, a temperature sensor is arranged between the heat conductor and the plug inner frame, and the temperature of the live wire plug is transmitted to the temperature sensor via the heat conductor; the heat conductor is composed of a plug heat conductive sheet and a fuse card slot, the fuse card slot opening is toward the top of the base shell, a fuse connected in series with the live wire is arranged in the fuse card slot, and the temperature of the fuse is transmitted to the temperature sensor via the heat conductor, and a pressure cover is arranged above the plug heat conductive sheet, and the pressure cover is connected to the base shell via a pressure cover buckle.

[0007] In order to protect the components inside the bottom shell, the bottom shell is provided with a protective cover.

[0008] The latch and the latch inner frame are an integrated structure.

[0009] The heat conducting member is provided with a latch slot, and the live wire latch is located in the latch slot.

[0010] The plug has a crimping portion connected to the power line, the crimping portion is located above the plug inner frame, and the crimping portion of the live wire plug is located in the plug slot.

[0011] The inner frame buckle includes an inner frame hook, which is arranged on the bottom shell and is engaged with the edge of the inner frame of the latch or the inner frame hole of the inner frame of the latch.

[0012] The pressure cover buckle includes a pressure cover hook and a pressure cover slot. The pressure cover hook is arranged on the pressure cover, and the pressure cover slot is arranged on the bottom shell.

[0013] The pressure cover card slots are provided with multiple layers, and the multiple layers of pressure cover card slots are sequentially arranged on the side wall of the bottom shell along the height direction of the bottom shell.

[0014] The bottom shell is provided with a copper ring limiting groove, a copper ring is provided in the copper ring limiting groove, the copper ring is sleeved on the power cord, the copper ring includes a limiting part and an anti-slip part, the anti-slip part is larger than the limiting part, the limiting part is located in the copper ring limiting groove, and the anti-slip part is located in the bottom shell.

[0015] The plug of the present invention is designed with a temperature sensor and a fuse inside. When the temperature exceeds a threshold, the power supply is disconnected based on the temperature sensor signal. When the current exceeds the specified limit, the fuse automatically blows to protect the circuit. The present invention transmits the plug and fuse temperatures to the temperature sensor via a thermal conductor, enabling the temperature sensor to effectively sense abnormal plug temperatures. Whether it's poor plug contact causing the plug to overheat or a circuit overload causing the fuse to blow, the temperature sensor can promptly detect these abnormalities and trigger a protective action (such as power off or an alarm). This significantly improves electrical safety while also reducing the impact of transient high temperatures and providing effective protection.

[0016] The present invention arranges the fuse in the fuse slot, which not only limits the fuse and transmits the temperature of the fuse to the temperature switch, but also facilitates the replacement of the fuse.

[0017] The pressure cap of the present invention helps secure the internal heat conductor and temperature sensor, preventing them from loosening or shifting due to vibration or movement during use, ensuring the stability and long-term reliability of the internal structure. The detachable pressure cap is easy to install and maintains a secure connection, while also facilitating easy assembly and disassembly of the plug.

[0018] In summary, the plug's key features are its dual temperature monitoring for safety and ease of maintenance. Placing the temperature sensor between the heat conductor and the plug's inner frame, and compressing the entire heat-conducting structure with a removable pressure cap, not only ensures efficient and accurate heat transfer to the sensor but also, more importantly, offers convenient maintenance access through "opening the cover to reach the core" while ensuring tight connections and stable operation of the internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is an exploded diagram of the plug structure.

[0021] Figure 2 This is a power cord connection diagram.

[0022] Figure 3 This is a schematic diagram of the structure of some components inside the plug.

[0023] Figure 4 This is a schematic diagram of the finished plug structure. DETAILED DESCRIPTION

[0024] like Figures 1 to 4As shown, a fusible plug based on temperature signal feedback includes a plug and a power cord 53 connected in series with the plug. The plug includes a live wire plug 11, a neutral wire plug, and a ground wire plug. The live wire plug 11, the neutral wire plug, and the ground wire plug are arranged at the bottom of the bottom shell 21. The bottom shell 21 has a live wire plug through-hole, a neutral wire plug through-hole, and a ground wire plug through-hole. The live wire plug 11 extends out of the bottom end of the bottom shell 21 through the live wire plug through-hole, the neutral wire plug extends out of the bottom end of the bottom shell 21 through the neutral wire plug through-hole, and the ground wire plug extends out of the bottom end of the bottom shell 21 through the ground wire plug through-hole. The live wire plug 11, the neutral wire plug, and the ground wire plug are all arranged on the plug inner frame 12 and are an integrated structure with the plug inner frame.

[0025] The latch inner frame 12 is connected to the bottom shell 21 via a plurality of latch inner frame buckles. Specifically, the buckles include inner frame hooks 23, which are provided on the bottom shell 21. The latch inner frame 12 is provided with inner frame buckle holes 121, and the inner frame hooks 23 are buckled into the inner frame buckle holes 121. Of course, the inner frame hooks 23 can also directly buckle the edges of the latch inner frame 12.

[0026] The live wire plug 11 has a live wire crimping portion 13, the neutral wire plug has a neutral wire crimping portion, and the ground wire plugs all have ground wire crimping portions. The live wire crimping portion 13, the neutral wire crimping portion, and the ground wire crimping portion are all located above the plug inner frame 12. The neutral wire of the power cord 53 is crimped to the neutral wire crimping portion, connecting the neutral wire to the neutral pin. The ground wire of the power cord 53 is crimped to the ground pin crimping portion, connecting the ground wire to the ground pin. The live wire of the power cord 53 is crimped to the live wire crimping portion 13, connecting the live wire to the live pin. A fuse 34 is connected in series with the live wire.

[0027] A thermal conductor is positioned above the latch inner frame 12. Made of ceramic (or other heat-conducting materials), it consists of a latch heat conducting plate 32 and a fuse slot 33. The fuse slot 33 is located on one side of the latch heat conducting plate 32, facing the top of the bottom case 21. A fuse 34 is positioned within the slot 33. The latch heat conducting plate 32 has a latch slot 131. The live wire crimping portion 13 is positioned within and in close contact with the latch slot 131. A temperature sensor 31 is positioned between the latch heat conducting plate 32 and the latch inner frame 12. The temperature sensor is a temperature switch (or a similar temperature sensor). The temperature of the live wire crimping portion 13 and the temperature of the fuse 34 are transmitted to the temperature sensor 31 via the thermal conductor. The first signal line of the temperature switch connects to the first signal line core of the power line 53, and the second signal line of the temperature switch connects to the second signal line core of the power line 53, thereby transmitting the temperature switch signal.

[0028] A pressure cover 41 is located above the latch heat conducting sheet 32. The pressure cover 41 is connected to the bottom shell 21 via multiple pressure cover clips. Specifically, the pressure cover clips include a pressure cover hook 42 and a pressure cover slot 24. The pressure cover hook 42 is located on the pressure cover 41, and the pressure cover slot 24 is located on the bottom shell 21. The pressure cover hook 42 is engaged with the pressure cover slot 24. The pressure cover slot 24 is provided with multiple layers (two layers are shown), and the two layers of pressure cover slots 24 are sequentially arranged on the side walls of the bottom shell 21 along the height direction of the bottom shell 21.

[0029] A copper ring limiting groove is provided at the tail of the bottom shell 21, and a copper ring 52 is provided in the copper ring limiting groove. The copper ring 52 is sleeved on the power cord 53. The copper ring 52 includes a limiting portion 522 and an anti-slip portion 521. The anti-slip portion 521 is larger than the limiting portion 522. The anti-slip portion 521 is located in the bottom shell 21, and the limiting portion 522 is located in the copper ring limiting groove.

[0030] In order to protect the components inside the bottom shell 21 , the bottom shell is provided with a protection cover 51 .

[0031] The above embodiments do not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A fusible plug based on temperature signal feedback, comprising a plug and a power cord connected in series with the plug, wherein the plug is disposed at the bottom of a base housing, the base housing being provided with a through-hole for the plug to pass through, the plug being connected to an inner plug frame, and the inner plug frame being connected to the base housing via an inner frame buckle, characterized in that: A heat conductor is provided above the inner frame of the latch, a temperature sensor is provided between the heat conductor and the inner frame of the latch, and the temperature of the live wire latch is transmitted to the temperature sensor through the heat conductor; the heat conductor is composed of a latch heat conductor and a fuse slot, the opening of the fuse slot is toward the top of the bottom shell, a fuse connected in series with the live wire is provided in the fuse slot, and the temperature of the fuse is transmitted to the temperature sensor through the heat conductor, a pressure cover is provided above the latch heat conductor, the pressure cover is connected to the bottom shell by a pressure cover buckle, and the bottom shell is provided with a protective cover.

2. The fusible plug based on temperature signal feedback according to claim 1, characterized in that: The latch and the latch inner frame are an integrated structure.

3. The fusible plug based on temperature signal feedback according to claim 1, characterized in that: The heat conducting member is provided with a latch slot, and the live wire latch is located in the latch slot.

4. The fusible plug based on temperature signal feedback according to claim 3, characterized in that: The plug has a crimping portion connected to the power line, the crimping portion is located above the plug inner frame, and the crimping portion of the live wire plug is located in the plug slot.

5. The fusible plug based on temperature signal feedback according to claim 1, characterized in that: The inner frame buckle includes an inner frame hook, which is arranged on the bottom shell and is engaged with the edge of the inner frame of the latch or the inner frame hole of the inner frame of the latch.

6. The fusible plug based on temperature signal feedback according to claim 1, characterized in that: The pressure cover buckle includes a pressure cover hook and a pressure cover slot. The pressure cover hook is arranged on the pressure cover, and the pressure cover slot is arranged on the bottom shell.

7. The fusible plug based on temperature signal feedback according to claim 6, characterized in that: The pressure cover card slots are provided with multiple layers, and the multiple layers of pressure cover card slots are sequentially arranged on the side wall of the bottom shell along the height direction of the bottom shell.

8. The fusible plug based on temperature signal feedback according to claim 1, characterized in that: The bottom shell is provided with a copper ring limiting groove, a copper ring is provided in the copper ring limiting groove, the copper ring is sleeved on the power cord, the copper ring includes a limiting part and an anti-slip part, the anti-slip part is larger than the limiting part, the limiting part is located in the copper ring limiting groove, and the anti-slip part is located in the bottom shell.

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