Temperature Controlled Shutoff Plug

Abstract

Provides a plug that cuts off the current in the event of overcurrent or overheating. [Solution] The present invention relates to the technical field of plugs, specifically, a temperature controlled cut-off plug, comprising a body 1 and a lead end 2, the lead end 2 being fixed to a first end of the body 1, a live pin 21 and a neutral pin 22 being provided at a second end of the body, and an overheating and overcurrent protection unit being connected in series between the lead end 2 and the live pin 21 and / or between the lead end 2 and the neutral pin 22. The present invention has a reasonable structure, and since an overheating and overcurrent protection unit is provided in the plug body, when an overcurrent or overheat occurs between the plug and the socket due to poor contact or short circuit in the circuit, the circuit between the lead end 2 and the pin is automatically cut off, thereby preventing the plug or socket from burning out and affecting the use of other electrical products.

Description

[Technical field]

[0001] The present invention relates to the technical field of plugs, and in particular to temperature controlled shutoff plugs. [Background technology]

[0002] A typical power cord plug currently on the market has two pins directly connected to a power cord (i.e., live and neutral wires) and is manufactured by injecting and molding PVC, and includes a pin, a holder, and a lead wire. One end of the pin is connected to one end of the lead wire inside the holder, and the other end is exposed outside the holder. It is used to insert into a power socket to introduce power and send power to an electrical appliance through the lead wire. The holder insulates each pin and insulates the live part from the outside. To ensure the safety of electricity use, power supply circuits and electrical appliances are generally equipped with overload and short-circuit protection circuits. When a short circuit occurs, the main fuse of the power supply circuit will blow or the internal protection circuit of the electrical appliance will short out, affecting the use of other electrical appliances and affecting their normal production and life.

[0003] Currently, the earth wire pin specifications of common three-phase plugs are generally of two types: cylindrical and flat, but they are not versatile and users need to carry multiple plugs when using them. The applicability of the plugs is very poor. In particular, when assembling the lead wire end and the shell in a connection structure, the two need to be glued together with adhesive, and if the plug is damaged, it must be discarded, which is a waste of resources. In particular, plugs and sockets tend to loosen over long periods of use, causing poor contact, which can ignite from the poor contact part when electricity is applied, causing high temperatures and burning the plug or socket, and even causing a fire.

[0004] Therefore, there is room for improvement and development in the current technology. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT DISCLOSURE The objective of the present invention is to provide a temperature controlled shutoff plug which is rational in structure, highly compatible, safe and controllable in view of the defects and shortcomings of the prior art. [Means for solving the problem]

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions.

[0007] The temperature controlled shutoff plug of the present invention includes a body and a lead end, The lead end is fixed to a first end of the body, a live pin and a neutral pin are provided at a second end of the body, and an overheating and overcurrent protection unit is connected in series between the lead end and the live pin and / or between the lead end and the neutral pin.

[0008] According to the above embodiment, the overheating and overcurrent protection unit includes a terminal, a fixing tab, and a bimetal sheet, the terminal and the fixing tab are fixedly connected by an insulating terminal, a first end of the bimetal sheet is fixedly connected to the fixing tab, a movable contact is provided at a second end of the bimetal sheet, a fixed contact is provided at the terminal, the live pin and neutral pin are fixedly connected to the corresponding fixing tabs, and the live and neutral wires at the lead wire ends are respectively connected to the terminals of the two overheating units.

[0009] According to the above embodiment, the PTC element is bridge-connected between the terminal and the bimetal sheet.

[0010] According to the above aspect, the movable contact is welded to the bimetal sheet by using a molten material, or the fixed contact is welded to the terminal by using a molten material.

[0011] According to the above aspect, the main body is further provided with a ground wire pin.

[0012] According to the above embodiment, the main body includes a housing and a positioning module, the housing is a hollow structure with an open upper end, two positioning modules are provided in the upper opening of the housing, engaging portions are opened in the positioning modules, the two positioning modules are provided symmetrically, the two engaging portions are paired to form a positioning port, a throat groove is provided on the lead wire end, and the throat groove is snap-connected to the positioning port to fix the lead wire end to the upper opening of the housing.

[0013] According to the above embodiment, the positioning module is provided with a plurality of limiting blocks, the live pins, the neutral pins and the earth pins are all provided with hinge plates, a jack is provided on the lower end surface of the housing, the live pins, the neutral pins and the earth pins are inserted into the corresponding jacks, and the limiting blocks of the two positioning modules are abutted against and connected to the hinge plates on the live pins, the neutral pins and the earth pins, respectively. According to the above aspect, the positioning module is provided with a fixing hole, and the positioning module is fixedly connected to the housing by a bolt and the fixing hole.

[0014] According to the above embodiment, an assembly groove is provided in the limit block paired with the earth wire pin, the ground wire at the end of the lead wire is fitted into the limit block and extends into the assembly groove, a high-speed replacement unit is provided at the upper end of the earth wire pin, the high-speed replacement unit includes a conductive sleeve and a conductive post, the conductive post is fixedly connected to the upper end of the earth wire pin, the conductive post is movably inserted into the conductive sleeve, a conductive nail is provided on the upper end plate of the conductive sleeve, a second disk is provided on the upper end of the conductive nail, the conductive sleeve is inserted into the assembly groove, and the second disk and the ground wire are in contact with each other to electrically connect them, a first locking structure is provided in the assembly groove, a slide rod is inserted into the upper end plate of the conductive sleeve, the lower end of the slide rod is fixedly connected to the conductive post, a first disk is provided at the upper end of the first slide rod, the first disk and the second disk are each paired with the first locking structure, a first spring is provided in the conductive sleeve, and the first spring presses against the upper end plate of the conductive sleeve and the upper end surface of the conductive post.

[0015] According to the above embodiment, the first locking structure includes a first guide rod and an inclined surface limiting base, a first slide groove is provided on the inner wall on both sides of the assembly groove, a first guide rod and an elastic element are provided in the first slide groove, a first end of the first guide rod is fixedly connected to the first assembly groove, the inclined surface limiting base is slidably provided on a second end of the first guide rod, and the elastic element presses against the inclined surface limiting base to snap-connect the inclined surface limiting base to the first disk.

[0016] According to the above embodiment, a second locking structure is provided between the ground wire pin and the housing, the second locking structure including a second slide groove, a second guide rod, and a stud tongue, the second slide groove is provided on the housing on the conductive post side, the conductive post is provided with a first locking groove that pairs with the second slide groove, a second guide rod and an elastic element are provided within the second slide groove, a first end of the second guide rod is fixedly connected to the second slide groove, the stud tongue is slidably provided on the second end of the second guide rod, and the elastic element is pressed against the stud tongue to snap-connect the stud tongue to the first locking groove.

[0017] According to the above embodiment, an auxiliary pairing structure is provided between the positioning module and the lead end, the auxiliary pairing structure including a driving slider, a third guide rod, and a wedge-shaped driving head; a lock box is provided at the upper end of the positioning module, the third guide rod is fixedly provided in the lock box, the driving slider is slidably connected to the third guide rod, an opening groove is provided on the upper end surface of the lock box, a second locking groove is provided in the throat groove, a lock head is provided at one end of the lock box, the lock head is inserted into the engagement part, and an elastic buckle is provided on the lock head, the wedge-shaped driving head and the driving slider are fixedly connected by a synchronization link, an elastic element is provided in the lock box, and the elastic element is pressed against the driving slider to fit and connect the wedge-shaped driving head and the elastic buckle.

[0018] According to the above embodiment, an auxiliary assembly structure is provided between the positioning module and the housing, the auxiliary assembly structure includes a ball, a rubber block, and an elastic element. A third locking groove is provided in the positioning module, a first end of the third locking groove penetrates the outer wall of the positioning module, a limiting groove is provided in the inner wall of the housing, the rubber block and the ball are inserted into a port at the first end of the third locking groove, and an elastic element is provided in the third locking groove, and the elastic element urges the rubber block and the ball into the limiting groove.

[0019] According to the above embodiment, an adjustment screw is provided at the second end of the third locking groove, the adjustment screw is screwed into the third locking groove, a pressure adjustment plate is provided in the third locking groove, one end of the adjustment screw is fitted and connected to the pressure adjustment plate, and the elastic element is provided between the pressure adjustment plate and the rubber block. Effect of the Invention

[0020] The beneficial effects of the present invention are as follows: The present invention has a reasonable structure and an overheating and overcurrent protection unit is provided in the plug body, so that if there is poor contact or short circuit in the circuit, or if overcurrent or overheat occurs between the plug and socket, the circuit between the lead wire end and the pin will be automatically cut off, preventing the plug or socket from burning out and affecting the use of other electrical products. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is an exploded structural schematic diagram of a housing according to the present invention. [Diagram 2] FIG. 2 is a schematic diagram of the structure of the present invention when the entirety is disassembled. [Diagram 3] FIG. 2 is a schematic diagram of the structure of the earth wire pin and the limiting block of the present invention when assembled. [Figure 4] FIG. 4 is an enlarged schematic diagram of the structure of part A in FIG. [Diagram 5] FIG. 4 is an enlarged schematic diagram of the structure of part B in FIG. [Figure 6] FIG. 2 is a structural schematic diagram of the ground wire pin and the high-speed exchange unit of the present invention; [Figure 7] 1 is a schematic diagram of the structure of the lead wire end and the positioning block of the present invention when assembled. FIG. [Figure 8] 8 is an enlarged schematic diagram of the structure of part C in FIG. 7. [Figure 9] FIG. 8 is an enlarged schematic diagram of the structure of part D in FIG. [Figure 10] FIG. 8 is an enlarged schematic diagram of the structure of part E in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, technical aspects of the present invention will be described with reference to the drawings and examples.

[0023] As shown in Figs. 1-2, the temperature controlled cut-off plug according to the present invention includes a body 1 and a lead end 2, the lead end 2 is fixed to a first end of the body 1, a live pin 21 and a neutral pin 22 are provided at a second end of the body 1, and a ground pin 23 is further provided on the body 1. An overheat and overcurrent protection unit is connected in series between the lead end 2 and the live pin 21 and / or between the lead end 2 and the neutral pin 22. The body 1 has an overheat and overcurrent protection unit built in for connecting the lead end 2 and the live pin 21 and the neutral pin 22 in series. When the plug body 1 is inserted into a socket to supply power to an electrical appliance, if poor contact or load short circuit occurs between the plug and the socket, causing the current to be too large or the temperature to be too high, the overheat and overcurrent protection unit responds in a timely manner to cut off the current path at the live pin 21 or the neutral pin 22, thereby avoiding the burnout of the plug body 1 and the socket. Furthermore, the overheat / overcurrent protection unit resets and turns on the power again only when power supply from the plug body 1 is stopped and troubleshooting is performed, thereby preventing the main brake of the power supply from being frequently cut off, causing other electrical equipment to become unable to be used and affecting daily life.

[0024] The overheating and overcurrent protection unit includes a terminal 3, a fixed tab 31, and a bimetal sheet 32, the terminal 3 and the fixed tab 31 are fixedly connected by an insulating terminal 33, a first end of the bimetal sheet 32 ​​is fixedly connected to the fixed tab 31, a movable contact 34 is provided at a second end of the bimetal sheet 32, and a fixed contact 35 is provided at the terminal 3, the live pin 21 and the neutral pin 22 are fixedly connected to the corresponding fixed tab 31, and the live and neutral wires of the lead end 2 are respectively connected to the terminals 3 of the two overheating units. The live wire at the lead end 2 is welded to the terminal 3 and connected in series with the live wire pin 21 by an overheat and overcurrent protection unit, and similarly, the neutral wire welding terminal 3 at the lead end 2 is connected in series with the neutral wire pin 22 by an overheat and overcurrent protection unit. Once an overload or short circuit occurs in the circuit between the electrical appliance, plug and socket, and especially when there is poor contact between the plug and socket, a fire or a rise in temperature may occur at the contact point between the plug and socket when the electrical appliance is used. At this time, the bimetal sheet 32 ​​responds and deforms instantaneously to cut off the path between the movable contact 34 and the fixed contact 35, thereby cutting off the current and protecting the plug body 1 and the socket. Preferably, two sets of overheat and overcurrent protection units are provided in the plug body 1, thereby providing double protection and better safety.

[0025] The PTC element 4 is bridge-connected between the terminal 3 and the bimetal sheet 32, and the resistance value of the PTC element 4 is significantly higher than that of the bimetal sheet 32. Under normal conditions, the PTC element 4 and the bimetal sheet 32 ​​are connected in parallel, and the PTC element 4 does not generate heat because its divided voltage is extremely small and it does not operate. If high temperature or short circuit occurs due to poor contact, the bimetal sheet 32 ​​jumps to cut off the path between the movable contact 34 and the fixed contact 35, so that the PTC element 4 reaches the operating voltage, the PTC element 4 generates heat, and maintains the thermal change state of the bimetal sheet 32. Therefore, the plug body 1 needs to cool down the PTC element 4 by cutting off the power before using it again, thereby realizing the function of power outage reset, and it is possible to avoid the situation where the power supply circuit is tripped by restarting the electrical equipment in a state where the fault is not cleared.

[0026] The movable contact 34 is welded to the bimetal sheet 32 ​​by using a molten material, or the fixed contact 35 is welded to the terminal 3 by using a molten material. The molten material can play the role of melting, and when the overcurrent / overheat protection unit fails, the molten material of the movable contact 34 or the fixed contact 35 cannot function, and both of them will detach, causing a forced power outage, thereby ensuring the safety of the protection socket, the electrical appliance and the entire power supply circuit.

[0027] The main body 1 includes a housing 11 and a positioning module 12. The housing 11 is a hollow structure with an open upper end. Two positioning modules 12 are provided in the upper opening of the housing 11. The positioning modules 12 have engagement portions. The two positioning modules 12 are provided symmetrically. The two engagement portions are paired to form a positioning opening 13. A throat groove 24 is provided on the lead wire end 2. The throat groove 24 is snap-connected to the positioning opening 13 to fix the lead wire end 2 to the upper opening of the housing 11. The housing 11 is made by injection molding, has insulating properties, and houses the overheating and overcurrent protection unit and the circuit therein. The lead wire end 2 is first welded to the terminal 3 and paired with the two positioning modules 12 by the throat groove 24. A jack 15 is provided on the lower end surface of the housing 11. The live wire pin 21, the neutral wire pin 22 and the earth wire pin 23 are paired with the jack 15 of the housing 11 and are integrally mounted on the upper end opening of the housing 11. The positioning module 12 is provided with fixing holes 16, and the positioning module 12 is fixedly connected to the housing 11 by the bolts and the fixing holes 16, so that the installation is efficiently performed.

[0028] A plurality of limiting blocks 14 are provided on the positioning module 12, the live pins 21, the neutral pins 22 and the earth pins are all provided with hinge plates 25, a jack 15 is provided on the lower end surface of the housing 11, the live pins 21, the neutral pins 22 and the earth pins are inserted into the corresponding jacks 15, and the limiting blocks 14 of the two positioning modules 12 are respectively abutted against the hinge plates 25 of the live pins 21, the neutral pins 22 and the earth pins to be connected. The limiting blocks 14 abut against the hinge plates 25 to restrict the live pins 21, the neutral pins 22 and the earth pins within the housing 11 and prevent them from loosening, while improving the stability of the overheating and overcurrent protection unit and extending the service life of the product.

[0029] As shown in FIG. 3, the limit block 14 paired with the ground line pin 23 is provided with an assembly groove 231, the ground line of the lead end 2 is fitted into the limit block 14 and extends into the assembly groove 231, and a high-speed exchange unit is provided on the upper end of the ground line pin 23, the high-speed exchange unit includes a conductive sleeve 232 and a conductive post 233, the conductive post 233 is fixedly connected to the upper end of the ground line pin 23, and the conductive post 233 is fixedly connected to the conductive sleeve 232. a conductive nail 234 is provided on an upper end plate of the conductive sleeve 232, a second disk 235 is provided on an upper end of the conductive nail 234, the conductive sleeve 232 is inserted into the assembly groove 231, the second disk 235 and the ground wire are brought into contact with each other to be electrically connected, a first locking structure is provided in the assembly groove 231, a slide rod 236 is inserted into the upper end plate of the conductive sleeve 232, and the lower end of the slide rod 236 is fixedly connected to the conductive post 233, a first disk 237 is provided on the upper end of the first slide rod 236, the first disk 237 and the second disk 235 are each paired with a first locking structure, a first spring 238 is provided in the conductive sleeve 232, and the first spring 238 is pressed against the upper end plate of the conductive sleeve 232 and the upper end surface of the conductive post 233. The illustrated ground wire pin 23 can be removed and replaced by a high-speed replacement unit, the conductive sleeve 232 and the conductive post 233 are assembled to the ground wire pin 23, an assembly groove 231 is opened in the corresponding limit block 14, when the ground wire pin 23 is mounted, the second disk 235 is inserted into the assembly groove 231, and the first locking structure locks the second disk 235 to abut and electrically connect the second disk 235 and the ground wire of the lead wire end 2. The second disk 235, the conductive nail 234, the conductive sleeve 232, the conductive post 233 and the ground wire pin 23 are connected in this order to form a ground line.

[0030] When removing the ground wire pin 23, the ground wire pin 23 is pushed upward along the vertical direction, and the conductive post 233 drives the first disc 237 by the first sliding rod 236, and the first disc 237 presses the first locking structure to unlock it, and then the second disc 235 slides from the assembly groove 231 to one side, thereby removing the ground wire pin 23 from the limiting block 14.

[0031] As shown in Figures 3 to 10, specifically, the first locking structure includes a first guide rod 141 and an inclined surface limiting base 142, a first slide groove 143 is provided on the inner walls on both sides of the assembly groove 231, the first guide rod 141 and an elastic element are provided in the first slide groove 143, a first end of the first guide rod 141 is fixedly connected to the first assembly groove 231, the inclined surface limiting base 142 is slidably provided on a second end of the first guide rod 141, and the elastic element presses against the inclined surface limiting base 142 to snap-connect the inclined surface limiting base 142 to the first disk 237. The inclined surface limiting base 142 is movable along the lateral direction of the first guide rod 141, and the elastic element may be a spring, which always biases the inclined surface limiting base 142 toward the conductive nail 234. When the second disk 235 is attached, the inclined surface limiting base 142 presses against the second disk 235 to release the lock. When the conductive post 233 drives the first disk 237 to move upward, the first disk 237 presses the inclined surface of the inclined surface limiting base 142 to generate a lateral pushing force against the acting force of the elastic element, and the inclined surface limiting base 142 is retracted into the first slide groove 143 to release the lock to the second disk 235.

[0032] A second locking structure is provided between the ground wire pin 23 and the housing 11, the second locking structure including a second slide groove 110, a second guide rod 111, and a stud tongue 112, the second slide groove 110 is provided on the housing 11 on the conductive post 233 side, the conductive post 233 is provided with a first locking groove 239 paired with the second slide groove 110, the second guide rod 111 and an elastic element are provided in the second slide groove 110, a first end of the second guide rod 111 is fixedly connected to the second slide groove 110, the stud tongue 112 is slidably provided on a second end of the second guide rod 111, and the elastic element presses against the stud tongue 112 to snap-connect the stud tongue 112 to the first locking groove 239. Preferably, the conductive nail 234 is inserted through a first disk 237, and the conductive nail 234 and the conductive sleeve 232 are relatively rotatable. Furthermore, when removing the ground wire pin 23, the ground wire pin 23 is rotated to press the stud tongue 112 with the conductive post 233, whereby the stud tongue 112 is pressed and retracted into the second slide groove 110 and slides on the first locking groove 239, thereby releasing the lock of the second locking structure on the ground wire pin 23, and the ground wire pin 23 slides upward to release the lock by the first locking structure.

[0033] An auxiliary pairing structure is provided between the positioning module 12 and the lead end 2, the auxiliary pairing structure includes a driving slider 121, a third guide rod 122, and a wedge-shaped driving head 123. A locking box 120 is provided at the upper end of the positioning module 12, the third guide rod 122 is fixedly provided in the locking box 120, the driving slider 121 is slidably connected to the third guide rod 122, and an open groove is provided on the upper end surface of the locking box 120. A second locking groove 241 is provided in the throat groove 24. A locking head 124 is provided at one end of the locking box 120, the locking head 124 is inserted into the engagement part, and an elastic buckle 125 is provided on the locking head 124. The wedge-shaped driving head 123 and the driving slider 121 are fixedly connected by a synchronization link 126, and an elastic element is provided in the locking box 120, which presses against the driving slider 121 to fit and connect the wedge-shaped driving head 123 and the elastic buckle 125. The auxiliary pairing structure is used to efficiently assemble the positioning module 12 and the lead wire end 2, the two positioning modules 12 clamp the lead wire end 2 from both sides, the throat groove 24 and the positioning hole 13 are paired to perform a snap fit, the locking head 124 of the locking box 120 is inserted into the throat groove 24, the elastic element drives the wedge-shaped driving head 123 to press the elastic buckle 125, and the elastic buckle 125 is snap-connected into the second locking groove 241, so that the positioning module 12 and the lead wire end 2 are efficiently connected and easily assembled in the housing 11. Of course, if maintenance is required for the components inside the housing 11, the driving slider 121 has a hole corresponding to the opening groove, so that a small tool can be used to push the driving slider 121 away from the locking head 124, and the synchronization link 126 drives the wedge-shaped driving head 123 to move away from the elastic buckle 125, so that the elastic buckle 125 can be reset and released from the second locking groove 241, thereby separating the positioning module 12 and the lead wire end 2.

[0034] an auxiliary assembly structure is provided between the positioning module 12 and the housing 11, the auxiliary assembly structure including a ball 127, a rubber block 128, and an elastic element; a third locking groove 129 is provided in the positioning module 12, a first end of the third locking groove 129 penetrates the outer wall of the positioning module 12, a limiting groove 113 is provided on the inner wall of the housing 11, the rubber block 128 and the ball 127 are inserted into the port of the first end of the third locking groove 129, and an elastic element is provided in the third locking groove 129, which urges the rubber block 128 and the ball 127 into the limiting groove 113. The positioning module 12 and the lead end 2 are integrated and installed through the upper opening of the housing 11. The ball 127 and the limiting groove 113 are paired. The elastic element drives the outer end of the rubber block 128 to abut against the inner wall of the housing 11, and the ball 127 is engaged in the limiting groove 113 to lock the position between the positioning module 12 and the housing 11 in the vertical direction. This locking method is elastic. When the vertical acting force between the positioning module 12 and the housing 11 is large, the ball 127 and the limiting groove 113 will separate against the elastic element, thus facilitating subsequent removal and maintenance.

[0035] An adjustment screw 114 is provided at a second end of the third locking groove 129, the adjustment screw 114 is screwed into the third locking groove 129, a pressure adjustment plate 115 is provided in the third locking groove 129, one end of the adjustment screw 114 is fitted and connected to the pressure adjustment plate 115, and an elastic element is provided between the pressure adjustment plate 115 and the rubber block 128. Furthermore, the friction force between the rubber block 128 and the inner wall of the housing 11 and the degree of fitting between the ball 127 and the limiting groove 113 can be adjusted by the adjustment screw 114. The acting force of the elastic element can be changed by turning the adjustment screw 114 to move the pressure adjustment plate 115 closer to or farther from the ball 127, and the elastic element is a spring.

[0036] The above are merely preferred embodiments of the present invention, and any equivalent changes or modifications made based on the structures, features and principles described in the scope of the patent application of the present invention shall be included in the scope of the patent application of the present invention. [Explanation of symbols]

[0037] 1 Main unit 2 Lead Wire End Terminal 3 4 PTC element 11. Housing 12 Positioning module 13 Positioning hole 14 Restriction Block 15 Jack 16 fixing hole 21 Hot pin 22 Neutral pin 23 Earth Wire Pin 24 Throat groove 25 Hinge plate 31 Fixed tab 32 Bimetallic sheet 33 Insulated terminal 34 Movable contact 35 Fixed contacts 110 Second slide groove 111 2nd guide rod 112 Stattongue 113 Restriction groove 114 Adjustment screw 115 Pressure adjustment plate 120 Lockbox 121 Drive slider 122 3rd guide rod 123 Wedge Drive Head 124 Rock Head 125 Elastic Buckle 126 Synchronization Link 127 Ball 128 Rubber Block 129 3rd lock groove 141 First guide rod 142 Slope Limit Base 143 First slide groove 231 Assembly groove 232 Conductive sleeve 233 Conductive Post 234 Conductive Nail 235 2nd Disc 236 Slide Rod 237 Disc 1 238 First Spring 239 First lock groove 241 Second lock groove

Claims

1. A temperature controlled shutoff plug including a body (1) and a lead end (2), The lead end (2) is fixed to a first end of the body (1), and a live pin (21) and a neutral pin (22) are provided at a second end of the body (1). An overheating and overcurrent protection unit is connected in series between the lead end (2) and the live pin (21) and / or between the lead end (2) and the neutral pin (22); the main body (1) comprises a housing (11) and a positioning module (12), the housing (11) is a hollow structure with an open upper end, two positioning modules (12) are provided in the upper opening of the housing (11), engaging portions are opened in the positioning modules (12), the two positioning modules (12) are provided symmetrically, and the two engaging portions are paired to form a positioning hole (13), the lead wire end (2) is provided with a throat groove (24), and the throat groove (24) is snap-connected to the positioning hole (13) to fix the lead wire end (2) to the upper opening of the housing (11).

2. 2. The temperature controlled shutoff plug of claim 1, wherein the overheating and overcurrent protection unit includes a terminal (3), a fixed tab (31), and a bimetallic sheet (32), the terminal (3) and the fixed tab (31) are fixedly connected by an insulating terminal (33), a first end of the bimetallic sheet (32) is fixedly connected to the fixed tab (31), a second end of the bimetallic sheet (32) is provided with a movable contact (34), and the terminal (3) is provided with a fixed contact (35), the live pin (21) and the neutral pin (22) are fixedly connected to the corresponding fixed tab (31), and the live and neutral wires of the lead wire end (2) are respectively connected to the terminals (3) of the two overheating units.

3. 3. The temperature controlled cut-off plug according to claim 2, wherein a PTC element (4) is bridge-connected between the terminal (3) and the bimetal sheet (32).

4. 3. The temperature controlled shutoff plug according to claim 2, characterized in that the movable contact (34) is welded to the bimetal sheet (32) using a molten material or the fixed contact (35) is welded to the terminal (3) using a molten material.

5. The temperature controlled cut-off plug according to any one of claims 1 to 3, characterized in that the second end of the body (1) is further provided with an earth wire pin (23) electrically connected to the lead wire end (2).

6. 2. The temperature controlled shutoff plug according to claim 1, wherein the positioning module (12) is provided with a plurality of limiting blocks (14), the live pins (21), the neutral pins (22) and the earth pins (23) are all provided with hinge plates (25), a jack (15) is provided on the lower end surface of the housing (11), the live pins (21), the neutral pins (22) and the earth pins (23) are inserted into the corresponding jacks (15), and the limiting blocks (14) of the two positioning modules (12) are abutted against and connected to the hinge plates (25) of the live pins (21), the neutral pins (22) and the earth pins (23), respectively.

7. 7. The temperature controlled cut-off plug according to claim 6, characterized in that the positioning module (12) is provided with a fixing hole (16), and the positioning module (12) is fixedly connected to the housing (11) by a bolt and the fixing hole (16).

8. The limit block (14) paired with the earth line pin (23) is provided with an assembly groove (231), the ground line of the lead line end (2) is fitted into the limit block (14) and extends into the assembly groove (231), a high-speed exchange unit is provided at the upper end of the earth line pin (23), the high-speed exchange unit includes a conductive sleeve (232) and a conductive post (233), the conductive post (233) is fixedly connected to the upper end of the earth line pin (23), the conductive post (233) is movably inserted into the conductive sleeve (232), a conductive nail (234) is provided on the upper end plate of the conductive sleeve (232), a second disk (235) is provided on the upper end of the conductive nail (234), and the conductive sleeve (232) is fitted into the assembly groove (231).

7. The temperature controlled cut-off plug of claim 6, wherein the conductive sleeve is inserted into the assembly groove to electrically connect the second disk (235) and the ground wire to each other; a first locking structure is provided in the assembly groove (231); a slide rod (236) is inserted into the upper end plate of the conductive sleeve (232), the lower end of the slide rod (236) is fixedly connected to the conductive post (233), a first disk (237) is provided at the upper end of the first slide rod (236), the first disk (237) and the second disk (235) are respectively paired with the first locking structure; a first spring (238) is provided in the conductive sleeve (232), and the first spring (238) presses against the upper end plate of the conductive sleeve (232) and the upper end surface of the conductive post (233).

9. The temperature controlled cut-off plug according to claim 8, characterized in that the first locking structure includes a first guide rod (141) and a slope limiting base (142), a first slide groove (143) is provided on the inner wall of both sides of the assembly groove (231), the first guide rod (141) and an elastic element are provided in the first slide groove (143), a first end of the first guide rod (141) is fixedly connected to the first assembly groove (231), the slope limiting base (142) is slidably provided on a second end of the first guide rod (141), and the elastic element is pressed against the slope limiting base (142) to snap-connect the slope limiting base (142) to the first disk (237).

10. A second locking structure is provided between the ground wire pin (23) and the housing (11), the second locking structure including a second slide groove (110), a second guide rod (111), and a stud tongue (112). The second slide groove (110) is provided on the housing (11) on the conductive post (233) side. The conductive post (233) is provided with a first locking groove (239) that is paired with the second slide groove (110). The second slide groove (110) is 9. The temperature controlled cut-off plug of claim 8, wherein a second guide rod (111) and an elastic element are provided in the first locking groove (239), a first end of the second guide rod (111) is fixedly connected to the second slide groove (110), the stud tongue (112) is slidably provided on the second end of the second guide rod (111), and the elastic element presses against the stud tongue (112) to snap-connect the stud tongue (112) into the first locking groove (239).

11. An auxiliary pairing structure is provided between the positioning module (12) and the lead wire end (2), the auxiliary pairing structure includes a driving slider (121), a third guide rod (122) and a wedge-shaped driving head (123). A lock box (120) is provided at the upper end of the positioning module (12), the third guide rod (122) is fixedly provided in the lock box (120), the driving slider (121) is slidably connected to the third guide rod (122), an opening groove is provided on the upper end surface of the lock box (120), and a second lock groove is provided in the throat groove (24). The temperature controlled cut-off plug of claim 1, further comprising: a locking head (124) at one end of the locking box (120), the locking head (124) is inserted into the engaging portion, the locking head (124) is provided with an elastic buckle (125), the wedge-shaped driving head (123) and the driving slider (121) are fixedly connected by a synchronizing link (126), and an elastic element is provided in the locking box (120), and the elastic element is pressed against the driving slider (121) to fit and connect the wedge-shaped driving head (123) and the elastic buckle (125).

12. 2. The temperature controlled cut-off plug according to claim 1, wherein an auxiliary assembly structure is provided between the positioning module (12) and the housing (11), the auxiliary assembly structure including a ball (127), a rubber block (128) and an elastic element; a third locking groove (129) is provided in the positioning module (12), a first end of the third locking groove (129) passes through an outer wall of the positioning module (12), a limiting groove (113) is provided on an inner wall of the housing (11), the rubber block (128) and the ball (127) are inserted into a port at the first end of the third locking groove (129), and an elastic element is provided in the third locking groove (129), which urges the rubber block (128) and the ball (127) into the limiting groove (113).

13. The temperature controlled cut-off plug according to claim 12, characterized in that: an adjusting screw (114) is provided at a second end of the third locking groove (129), the adjusting screw (114) is screwed into the third locking groove (129), a pressure adjusting plate (115) is provided in the third locking groove (129), one end of the adjusting screw (114) is matingly connected to the pressure adjusting plate (115), and an elastic element is provided between the pressure adjusting plate (115) and a rubber block (128).

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