A mini thermostat with leakage and overheat protection

Abstract

The present invention provides a miniature thermostat with a snap-action protection against leakage and overheating, and relates to the field of snap-action thermostats. The miniature thermostat with a snap-action protection against leakage and overheating comprises a heat receiving block, a thermostat body, a power-off block, a fixed block, and a rotating column. The heat receiving block is connected to a high-temperature metal spring plate via a connecting block. The thermostat body, the power-off block, and the fixed block are sequentially arranged on the upper side of the heat receiving block. The fixed block is connected to an upper connecting contact block via a rotating column, a threaded cavity, a snap-action shaft, a rubber inner ring, and a power-off connecting shaft. The left and right sides of the thermostat body are connected to power terminals via external power-on plates. By providing a mutually threaded connection between the rotating column and the snap-action shaft, it is convenient to control the snap-action shaft to move vertically up and down when controlling the rotating column, thereby driving the metal spring to slide inside the spring slide groove, making it convenient for the metal spring to snap into the spring fixing groove, thereby achieving rapid resetting of the snap-action shaft after it jumps upward.

Description

Technical Field

[0001] The present invention relates to the technical field of snap-type thermostats, in particular to a snap-type mini thermostat with leakage-proof and overheat-protection function. Background Art

[0002] The structure of traditional snap-action mini thermostats is often relatively simple, and its external structure generally includes a cover and a bottom cover. The snap-action thermostat mainly sets a high-temperature metal disc that can be deformed under high temperature conditions in the closed space inside the main body, and uses a ceramic rod to drive the moving contact and the fixed contact of the terminal to connect the circuit. When the high-temperature metal disc is deformed, it drives the ceramic rod to move, and then drives the contact and the fixed contact to separate and disconnect, and the moving contact is connected to the spring sheet. The lower end of the ceramic rod can push the high-temperature metal disc to control the contact reset of the moving contact and the fixed contact.

[0003] However, the existing snap-action mini thermostats cannot provide protection against leakage when in use. When connected to the circuit, especially at the circuit connection port of the thermostat, current leakage often occurs, causing certain dangers. The safety factor is often low. At the same time, after the ceramic rod of the snap-action mini thermostat is reset multiple times, it often causes poor contact between the moving contact and the fixed contact, which can easily affect the service life of the thermostat. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present invention provides a mini thermostat with leakage and overheat protection snap-action, which solves the problems that the prior thermostat cannot prevent current overload and overheating, cannot perform power-off processing in a timely manner, lacks leakage protection during circuit electrolysis, cannot recycle the snap-action shaft for reset and jump, and the contact block connection is poor and cannot be repaired after the snap-action shaft resets and jumps too much.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a mini thermostat with leakage and overheat protection jump type, comprising a heat block, a thermostat body, a power-off block, a fixed block and a rotating column, wherein the middle part of the lower side of the heat block is fixedly connected to a heat conducting plate, the middle part of the upper side of the heat block is provided with a spring cavity, the middle parts of the left and right sides of the spring cavity are fixedly connected to two connecting blocks, the inner sides of the connecting blocks are respectively provided on the upper and lower sides of the two ends of the high-temperature metal spring plate, the upper side of the heat block is fixedly connected to the middle part of the lower side of the thermostat body, the middle part of the upper side of the thermostat body is provided with a power-off block, the middle part of the upper side of the power-off block is fixedly connected to the fixed block, the inner side of the fixed block is rotatably connected to a rotating column, the lower side of the rotating column is rotatably connected to the middle part of the upper side of the power-off block, and the lower middle part of the rotating column is provided with a threaded cavity. The inner side of the threaded cavity is threadedly connected to the outer side of the upper end of the jump shaft, and the outer side of the jump shaft is slidably connected to the power-off block and the middle part of the thermostat body from top to bottom in sequence, and the outer side of the lower end of the jump shaft passes through the power-off block and the thermostat body to connect the inside of the shrapnel cavity, and the lower side of the jump shaft is fixedly connected to a rubber pushing plate, and the lower ends of the left and right sides of the thermostat body are fixedly connected to external power-on plates, and the upper side of the external power-on plates away from the thermostat body are fixedly connected to power terminals, and the outer sides of the connection between the external power-on plates and the thermostat body are fixedly connected to rubber mounting blocks, and a rubber inner ring is provided in the middle of the lower part of the jump shaft, and the middle inside of the rubber inner ring is provided on the outer side of the middle of the power-off connecting shaft, and the outer sides of both ends of the power-off connecting shaft are slidably connected to the inside of the connecting shaft sliding cavity, and the connecting shaft sliding cavity is provided in the middle of the lower side of the power-off block.

[0006] Preferably, the lower outer portion of the rotating column is fixedly connected to a limited rotating block, the outer side of the limited rotating block is slidably connected to the inside of the limited rotating groove, and the limited rotating groove is arranged on the inner side of the fixed block.

[0007] Preferably, a metal shrapnel is fixedly connected to the outer side of the middle part of the jump shaft, and the outer side of the metal shrapnel is slidably connected to the inside of the shrapnel slide groove, and the shrapnel slide groove is arranged on the left and right sides of the inner side of the upper part of the power-off block, and shrapnel fixing grooves are arranged on the left and right sides of the inner side of the middle part of the power-off block, and the shrapnel slide groove and the inner side of the shrapnel fixing groove on the same side are connected to each other.

[0008] Preferably, a rubber pad is provided inside the lower side of the power-off block, and connecting mounting plates are fixedly connected on both the left and right sides of the lower end of the power-off block. The front and rear ends of the outer ends of the connecting mounting plates are rotatably connected to the interior of the mounting plate fixing bolts, and the outer sides of the bottom ends of the mounting plate fixing bolts are threadedly connected to the front and rear ends of the upper left side of the thermostat body and the front and rear ends of the upper right side of the thermostat body.

[0009] Preferably, the left and right sides of the lower end of the jump shaft are fixedly connected to the limit sliders, the outer sides of the limit sliders are slidably connected to the inner sides of the limit slots, and the limit slots are arranged inside the middle part of the thermostat body.

[0010] Preferably, the lower ends of the left and right ends of the power-off connecting shaft are threadedly connected with trapezoidal threaded rods, the lower ends of the trapezoidal threaded rods are fixedly connected with upper connecting contact blocks, the lower sides of the upper connecting contact blocks are abutted against the lower connecting contact blocks, the lower sides of the lower connecting contact blocks are fixedly connected to one end of the internal connecting circuit, and the left and right parts of the middle upper side of the thermostat body are provided with contact grooves, the upper connecting contact blocks and the lower connecting contact blocks are both located inside the contact grooves, and the internal connecting circuits are arranged inside the left and right ends of the lower end of the thermostat body, and the upper ends of the internal connecting circuits close to one end of the jump shaft are all through and arranged at the lower bottom end of the contact groove.

[0011] Preferably, fuse cavities are provided inside the left and right ends of the lower end of the thermostat body, and rubber isolation plates are fixedly connected to the left and right sides of the inner side of the fuse cavity, and the inner sides of the rubber isolation plates are fixedly connected to fuse mounting seats, the inner sides of the fuse mounting seats are respectively fixedly connected to the two ends of the fuse body, and the lower ends of the outer sides of the fuse mounting seats are fixedly connected to external connection circuits, and the outer sides of the external connection circuits close to one end of the fuse body are all through-arranged inside the lower end of the rubber isolation plate, and the other ends of the external connection circuits are fixedly connected to one end of the external power-on plate close to the thermostat body, and the other ends of the internal connection circuits are fixedly connected to the lower end of the internal fuse mounting seat.

[0012] Preferably, fixed folding plates are fixedly connected to the left and right ends of the lower side of the thermostat body, the fixed folding plates are arranged as an L-shaped structure, and the other end of the fixed folding plate faces in the opposite direction, and the middle part of the other end of the fixed folding plate is threadedly connected to a folding plate fixing bolt.

[0013] Working principle: When the thermostat is in use, the folding plate fixing bolts can be used to fix the folding plate on the installed electrical component, so that the heat conducting plate can be easily pressed against the heating end of the installed electrical component. At this time, the power-on terminal is connected to the connection circuit of the installed electrical component. When the installed electrical component is overheated, the high-temperature metal spring plate can be used to push the jump shaft upward. Since the internal thread of the threaded cavity is only set to two circles, it can ensure that the jump shaft can move upward and jump. At this time, the rotation of the rotating column can be controlled to realize the downward reset and fixation of the jump shaft. Since the thermostat has a fuse inside the thermostat body to connect the terminal and the lower connecting contact block, it can prevent the voltage and current from being too large when the power-on terminal is connected to the power, causing overload and damaging the connection circuit. It can also prevent current overload and overheating, and timely power-off processing to improve the thermostat. The safety of use in the circuit is enhanced. At the same time, the thermostat is also equipped with a rubber mounting block at the connection of the external power-on board, a rubber pad inside the lower end of the power-off block, and rubber insulation at both ends of the fuse, which can play the role of isolating the current at the circuit wiring connection end to prevent the thermostat from leaking during the current transmission process, thereby improving the safety of the thermostat when in use. At the same time, the thermostat is also equipped with a mounting plate fixing bolt to fix the mounting plate on the upper side of the thermostat body, facilitate the rapid disassembly of the power-off block, and facilitate the threaded fixation of the trapezoidal threaded rod inside the power-off connection shaft, thereby facilitating the adjustment of the contact position of the upper and lower connecting contact blocks, facilitating the inspection and replacement of poor contact of the contact blocks, and facilitating the replacement of circuit contact elements, thereby increasing the service life of the thermostat.

[0014] The present invention provides a miniature thermostat with leakage and overheat protection. It has the following beneficial effects:

[0015] 1. The present invention provides a fuse inside the thermostat body to connect the wiring terminal and the lower connection contact block, thereby preventing the voltage and current from being too large when the power terminal is connected to the power, causing overload and damaging the connection circuit. It can also prevent current overload and overheating, and promptly perform power-off processing, thereby improving the safety of the thermostat when used in the circuit.

[0016] 2. The present invention provides a rubber mounting block at the connection of the external power-on board, a rubber pad inside the lower end of the power-off block, and rubber insulation at both ends of the fuse, which can play the role of isolating the current at the circuit wiring connection end to prevent leakage of the thermostat during current transmission, thereby improving the safety of the thermostat during use.

[0017] 3. The present invention sets a rotating column on the inner side of the fixed block. Since the inner side of the lower end of the rotating column and the jump shaft are threadedly connected to each other, and the two sides of the lower end of the jump shaft are fixedly connected with limit sliders that slide within the limit slide groove, when the rotating column is controlled, the jump shaft can be controlled to move vertically up and down, thereby driving the metal spring to slide inside the spring slide groove, making it convenient for the metal spring to be engaged with the inside of the spring fixed groove. Therefore, by utilizing the rotation of the rotating column, the metal spring can be engaged and fixed inside the fixed groove, thereby realizing the rapid reset of the jump shaft after jumping. The structure is simple and the operation is convenient.

[0018] 4. The present invention provides a mounting plate fixing bolt, which can fix the connecting mounting plate to the upper side of the thermostat body, facilitates the rapid disassembly of the power-off block, facilitates the threaded fixation of the trapezoidal threaded rod inside the power-off connecting shaft, and further facilitates the adjustment of the contact position of the upper connecting contact block and the lower connecting contact block, facilitates the inspection and replacement of poor contact of the contact block connection, and also facilitates the replacement of circuit contact elements, thereby increasing the service life of the thermostat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a main perspective schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the front perspective view of the sudden jump shaft structure of the present invention;

[0021] Figure 3 It is a front cross-sectional schematic diagram of the present invention;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0024] Figure 6 for Figure 3 Enlarged view of point C in the middle;

[0025] Figure 7 for Figure 3 Enlarged view of point D in the middle;

[0026] Figure 8 for Figure 3 Enlarged view of point E in the middle.

[0027] Among them, 1. Heat block; 2. Thermostat body; 3. Power off block; 4. Fixed block; 5. Rotating column; 6. External power board; 7. Power terminal; 8. Rubber mounting block; 9. Fixed folding plate; 10. Folding plate fixing bolt; 11. Heat conducting plate; 12. Connecting block; 13. High temperature metal spring plate; 14. Jump shaft; 15. Rubber push plate; 16. Rubber inner ring; 17. Power off connecting shaft; 18. Trapezoidal threaded rod; 19. Upper connecting contact block; 20. Lower connecting contact block; 21. External connection Circuit; 22. Internal connecting circuit; 23. Fuse cavity; 24. Fuse body; 25. Fuse mounting seat; 26. Rubber isolation plate; 27. Connecting mounting plate; 28. Mounting plate fixing bolt; 29. ​​Limit slider; 30. Limit slide groove; 31. Metal spring; 32. Spring slide groove; 33. Spring fixing groove; 34. Threaded cavity; 35. Limit rotation block; 36. Limit rotation groove; 37. Connecting shaft sliding cavity; 38. Spring cavity; 39. Rubber pad; 40. Contact groove. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example:

[0030] like Figure 1-8As shown, the embodiment of the present invention provides a mini thermostat with leakage and overheat protection jump type, including a heat block 1, a thermostat body 2, a power-off block 3, a fixed block 4 and a rotating column 5. The middle part of the lower side of the heat block 1 is fixedly connected to a heat conducting plate 11, and the middle part of the upper side of the heat block 1 is provided with a spring cavity 38. Two connecting blocks 12 are fixedly connected to the middle parts of the left and right sides of the spring cavity 38. The inner sides of the connecting blocks 12 are respectively provided on the upper and lower sides of the high-temperature metal spring plates 13. The upper side of the heat block 1 is fixedly connected to the middle part of the lower side of the thermostat body 2, and the middle part of the upper side of the thermostat body 2 is provided with a power-off block 3. The middle part of the upper side of the power-off block 3 is fixedly connected to the fixed block 4. The inner part of the fixed block 4 is rotatably connected to the rotating column 5. The lower side of the rotating column 5 is rotatably connected to the middle part of the upper side of the power-off block 3. A threaded cavity 34 is provided in the lower middle part of the rotating column 5. The threaded cavity 34 is threadedly connected to the inner side of the threaded cavity On the outside of the upper end of the sudden jump shaft 14, the outside of the sudden jump shaft 14 is slidably connected to the power-off block 3 and the middle part of the thermostat body 2 from top to bottom, and the outside of the lower end of the sudden jump shaft 14 passes through the power-off block 3 and the thermostat body 2 to connect the inside of the shrapnel cavity 38, and the lower side of the sudden jump shaft 14 is fixedly connected to a rubber pushing plate 15, and the lower ends of the left and right sides of the thermostat body 2 are fixedly connected to the external power-on plate 6, and the upper side of the external power-on plate 6 away from the thermostat body 2 is fixedly connected to the power terminal 7, and the outer side of the connection between the external power-on plate 6 and the thermostat body 2 is fixedly connected to the rubber mounting block 8, and a rubber inner ring 16 is provided in the middle of the lower part of the sudden jump shaft 14, and the middle part of the rubber inner ring 16 is provided on the outside of the middle of the power-off connecting shaft 17, and the outer sides of the two ends of the power-off connecting shaft 17 are slidably connected to the inside of the connecting shaft sliding cavity 37, and the connecting shaft sliding cavity 37 is provided in the middle of the lower side of the power-off block 3.

[0031] The lower outer side of the rotating column 5 is fixedly connected to a limited rotating block 35, and the outer side of the limited rotating block 35 is slidably connected to the inside of the limited rotating groove 36. The limited rotating groove 36 is arranged on the inner side of the fixed block 4, which can ensure that the rotating column 5 can be limitedly rotated and prevent sliding during rotation from causing a certain impact on the movement of the jump shaft 14.

[0032] The outer side of the middle of the sudden jump shaft 14 is fixedly connected with a metal spring 31, and the outer side of the metal spring 31 is slidably connected to the inside of the spring slide 32, and the spring slide 32 is arranged on the left and right sides of the upper inner side of the power-off block 3, and the left and right sides of the inner side of the middle of the power-off block 3 are provided with spring fixing grooves 33. The spring slide 32 and the spring fixing groove 33 on the same side are connected to each other. By arranging a rotating column 5 on the inner side of the fixed block 4, the inner side of the lower end of the rotating column 5 and the sudden jump shaft 14 are threadedly connected to each other, and the sudden jump shaft 14 The two sides of the lower end are fixedly connected with limit sliders 29 that slide within the limit slide groove 30. Therefore, when the rotating column 5 is controlled, the jump shaft 14 can be controlled to move vertically up and down, thereby driving the metal spring 31 to slide inside the spring slide groove 32, making it convenient for the metal spring 31 to be engaged with the spring fixing groove 33. Therefore, by utilizing the rotation of the rotating column 5, the metal spring 31 can be engaged and fixed inside the fixing groove, thereby realizing the rapid reset of the jump shaft 14 after jumping. The structure is simple and easy to operate.

[0033] A rubber pad 39 is provided inside the lower side of the power-off block 3, and the left and right sides of the lower end of the power-off block 3 are fixedly connected with a connecting mounting plate 27, and the front and rear ends of the outer ends of the connecting mounting plate 27 are rotatably connected to the interior of the mounting plate fixing bolts 28, and the outer sides of the bottom ends of the mounting plate fixing bolts 28 are threadedly connected to the interior of the front and rear ends of the upper left part of the thermostat body 2 and the interior of the front and rear ends of the upper right part of the thermostat body 2. By providing a rubber mounting block 8 at the connection of the external power-on plate 6, a rubber pad 39 is provided inside the lower end of the power-off block 3, and rubber insulation is provided at both ends of the fuse, which can play the role of isolating the current of the circuit wiring connection end to prevent leakage of the thermostat during current transmission, thereby improving the safety of the thermostat when in use.

[0034] The left and right sides of the lower end of the jump shaft 14 are fixedly connected to the limit slider 29, and the outer sides of the limit slider 29 are slidably connected to the inner sides of the limit slide groove 30. The limit slide groove 30 is arranged inside the middle part of the thermostat body 2, which can ensure that the jump shaft 14 can move vertically up and down when the rotating column 5 rotates.

[0035] The lower ends of the left and right ends of the power-off connecting shaft 17 are both threadedly connected with a trapezoidal threaded rod 18, and the lower ends of the trapezoidal threaded rod 18 are fixedly connected with an upper connecting contact block 19. The lower side of the upper connecting contact block 19 is abutted with a lower connecting contact block 20, and the lower side of the lower connecting contact block 20 is fixedly connected to one end of the internal connecting line 22. Contact grooves 40 are provided on the left and right parts of the middle part of the upper side of the thermostat body 2. The upper connecting contact block 19 and the lower connecting contact block 20 are both located inside the contact groove 40, and the internal connecting line 22 is provided inside the left and right ends of the lower end of the thermostat body 2, and the internal connection The upper end of the line 22 near the jump shaft 14 is passed through and arranged at the lower bottom end of the contact groove 40. By arranging the mounting plate fixing bolt 28, the mounting plate 27 can be fixed on the upper side of the thermostat body 2, which facilitates the rapid disassembly of the power-off block 3 and the threaded fixation of the trapezoidal threaded rod 18 inside the power-off connecting shaft 17, thereby facilitating the adjustment of the contact position of the upper connecting contact block 19 and the lower connecting contact block 20, facilitating the inspection and replacement of poor contact of the contact blocks, and also facilitating the replacement of circuit contact elements, thereby increasing the service life of the thermostat.

[0036] The left and right ends of the lower end of the thermostat body 2 are both provided with a fuse cavity 23, and the left and right sides of the inner side of the fuse cavity 23 are fixedly connected with a rubber isolation plate 26, and the inner side of the rubber isolation plate 26 is fixedly connected with a fuse mounting seat 25. The inner side of the fuse mounting seat 25 is respectively fixedly connected to the two ends of the fuse body 24. The lower end of the outer side of the external fuse mounting seat 25 is fixedly connected to the external connection line 21. The outer side of the external connection line 21 is close to the outer side of the end of the fuse body 24 and is set inside the lower end of the rubber isolation plate 26. The other ends of the connecting lines 21 are fixedly connected to the end of the external power-on board 6 close to the thermostat body 2, and the other ends of the internal connecting lines 22 are fixedly connected to the lower end of the internal fuse mounting seat 25. By providing a rubber mounting block 8 at the connection of the external power-on board 6, a rubber pad 39 is provided inside the lower end of the power-off block 3, and rubber insulation is provided at both ends of the fuse, which can play the role of isolating the current of the circuit wiring connection end to prevent leakage of the thermostat during current transmission, thereby improving the safety of the thermostat when in use.

[0037] The left and right ends of the lower side of the thermostat body 2 are fixedly connected with fixed folding plates 9. The fixed folding plates 9 are set to an L-shaped structure, and the other end of the fixed folding plates 9 faces in the opposite direction. The middle part of the other end of the fixed folding plates 9 is threadedly connected with folding plate fixing bolts 10, which can realize the fixation of the fixed folding plates 9 on the installed electrical components, thereby facilitating the heat conduction plate 11 to resist the heating end of the installed electrical components.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A miniature thermostat with leakage and overheat protection, comprising a heat receiving block (1), a thermostat body (2), a power-off block (3), a fixed block (4), and a rotating column (5), characterized in that: A heat conducting plate (11) is fixedly connected to the middle of the lower side of the heat receiving block (1), a spring cavity (38) is provided in the middle of the upper side of the heat receiving block (1), two connecting blocks (12) are fixedly connected to the middle of the left and right sides of the spring cavity (38), the inner sides of the connecting blocks (12) are respectively provided at the upper and lower sides of the two ends of the high-temperature metal spring plate (13), the upper side of the heat receiving block (1) is fixedly connected to the middle of the lower side of the thermostat body (2), and the upper side of the thermostat body (2) is fixedly connected to the lower side of the thermostat body (2). A power-off block (3) is provided in the middle of the side, a fixed block (4) is fixedly connected to the middle of the upper side of the power-off block (3), a rotating column (5) is rotatably connected to the inner side of the fixed block (4), the lower side of the rotating column (5) is rotatably connected to the middle of the upper side of the power-off block (3), a threaded cavity (34) is provided in the middle of the lower side of the rotating column (5), the inner side of the threaded cavity (34) is threadedly connected to the outer side of the upper end of the sudden jump shaft (14), and the outer side of the sudden jump shaft (14) is slidably connected from top to bottom in sequence. The spring shaft (14) is connected to the middle of the power-off block (3) and the thermostat body (2), and the outer side of the lower end of the spring shaft (14) passes through the power-off block (3) and the thermostat body (2) to communicate with the inside of the spring cavity (38). The lower side of the spring shaft (14) is fixedly connected to a rubber push plate (15). The lower ends of the left and right sides of the thermostat body (2) are fixedly connected to external power-on plates (6). The upper side of the end of the external power-on plate (6) away from the thermostat body (2) is fixedly connected to a power-on terminal. (7), the outer sides of the connection between the external power-on plate (6) and the thermostat body (2) are fixedly connected with a rubber mounting block (8), the lower middle part of the jump shaft (14) is provided with a rubber inner ring (16), the middle part of the rubber inner ring (16) is provided on the outer side of the middle part of the power-off connecting shaft (17), the outer sides of both ends of the power-off connecting shaft (17) are slidably connected inside the connecting shaft sliding cavity (37), and the connecting shaft sliding cavity (37) is provided on the lower middle part of the power-off block (3).

2. The miniature thermostat with leakage and overheat protection according to claim 1, characterized in that: The lower outer portion of the rotating column (5) is fixedly connected to a limited rotating block (35), and the outer side of the limited rotating block (35) is slidably connected to the inside of a limited rotating groove (36), and the limited rotating groove (36) is arranged on the inner side (4) of the fixed block.

3. The miniature thermostat with leakage and overheat protection according to claim 1, characterized in that: A metal spring (31) is fixedly connected to the outer side of the middle of the jump shaft (14), and the outer side of the metal spring (31) is slidably connected to the inside of the spring slide groove (32), and the spring slide groove (32) is arranged on the left and right sides of the inner side of the upper part of the power-off block (3), and spring fixing grooves (33) are arranged on the left and right sides of the inner side of the middle of the power-off block (3), and the inner sides of the spring slide groove (32) and the spring fixing groove (33) on the same side are connected to each other.

4. The miniature thermostat with leakage and overheat protection according to claim 1, characterized in that: A rubber pad (39) is provided inside the lower side of the power-off block (3), and a connecting mounting plate (27) is fixedly connected to the left and right sides of the lower end of the power-off block (3), and the interior of the front and rear ends of the outer ends of the connecting mounting plate (27) are rotatably connected to the interior of the mounting plate fixing bolts (28), and the outer sides of the bottom ends of the mounting plate fixing bolts (28) are threadedly connected to the interior of the front and rear ends of the upper left part of the thermostat body (2) and the interior of the front and rear ends of the upper right part of the thermostat body (2).

5. The miniature thermostat with leakage and overheat protection according to claim 1, characterized in that: The left and right sides of the lower end of the jump shaft (14) are fixedly connected to the limiting slider (29), the outer sides of the limiting slider (29) are slidably connected to the inner sides of the limiting slide groove (30), and the limiting slide groove (30) is arranged inside the middle part of the thermostat body (2).

6. The miniature thermostat with leakage and overheat protection according to claim 1, characterized in that: The lower ends of the left and right ends of the power-off connecting shaft (17) are both threadedly connected to a trapezoidal threaded rod (18), and the lower ends of the trapezoidal threaded rod (18) are fixedly connected to an upper connecting contact block (19), and the lower side of the upper connecting contact block (19) is provided with a lower connecting contact block (20), and the lower side of the lower connecting contact block (20) is fixedly connected to one end of the internal connecting circuit (22). The left and right parts of the middle part of the upper side of the thermostat body (2) are both provided with contact grooves (40), and the upper connecting contact block (19) and the lower connecting contact block (20) are both located inside the contact grooves (40), and the internal connecting circuit (22) is provided inside the left and right ends of the lower end of the thermostat body (2), and the upper end of the internal connecting circuit (22) close to one end of the sudden jump shaft (14) is through-set and provided at the lower bottom end of the contact groove (40).

7. The miniature thermostat with leakage and overheat protection according to claim 6, characterized in that: The left and right ends of the lower end of the thermostat body (2) are both provided with a fuse cavity (23), and the left and right sides of the inner side of the fuse cavity (23) are both fixedly connected with a rubber isolation plate (26), and the inner side of the rubber isolation plate (26) is fixedly connected with a fuse mounting seat (25). The inner side of the fuse mounting seat (25) is respectively fixedly connected to the two ends of the fuse body (24). The outer lower end of the outer side of the fuse mounting seat (25) is fixedly connected to an external connection circuit (21). The outer side of the external connection circuit (21) near one end of the fuse body (24) is through-set inside the lower end of the rubber isolation plate (26), and the other end of the external connection circuit (21) is fixedly connected to one end of the external power-on plate (6) near the thermostat body (2), and the other end of the internal connection circuit (22) is fixedly connected to the lower end of the internal fuse mounting seat (25).

8. The miniature thermostat with leakage and overheat protection according to claim 1, characterized in that: The left and right ends of the lower side of the thermostat body (2) are fixedly connected with fixed folding plates (9), the fixed folding plates (9) are arranged in an L-shaped structure, and the other end of the fixed folding plates (9) faces in the opposite direction, and the middle part of the other end of the fixed folding plates (9) is threadedly connected with folding plate fixing bolts (10).

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