Overheat recovery prevention protector

Abstract

It provides a one-time overheat protection function. [Solution] The base is provided with a first electrical terminal, a second electrical terminal, a spring piece, and a temperature-sensing piece. The first end of the spring piece is fixedly connected to the first electrical terminal, and the second end of the spring piece is installed corresponding to the second electrical terminal. The temperature-sensing piece is installed above the spring piece, and the first end of the temperature-sensing piece is fitted and connected to the first electrical terminal, and the second end of the temperature-sensing piece is fitted and connected to the second end of the spring piece. The base is provided with a return stopper structure, which is fitted and connected to the second end of the spring piece. By installing the temperature-sensing piece in an exposed state, sensitivity to ambient temperature can be increased. When the temperature reaches a critical value, the temperature-sensing piece moves to turn off the connection of the spring piece, thereby turning off the circuit. Due to the deformation of the temperature-sensing piece, the spring piece can move over the return stopper structure and fit and connect to it, preventing the temperature-sensing piece from deforming again and returning the spring piece to its original state, thereby realizing a one-time overheat protection function.

Description

Technical Field

[0001] The present invention relates to the technical field of thermostats, and specifically, it is an overheat return prevention protector.

Background Art

[0002] A thermostat refers to a series of automatic control elements that, in response to changes in the temperature of the operating environment, cause physical deformation inside the switch, thereby generating a special effect and resulting in an on or off operation. Regarding its operating principle, the temperature of the environment is automatically sampled by a temperature sensing component, monitored in real time, and when the temperature of the environment is higher than the control set value, the on / off of the circuit is controlled. A general jump thermostat is a contact-type temperature sensor and needs to be attached to the surface of the heating element, conducting heat to the temperature-sensitive bimetal plate through a housing or a heat-conductive element. When the temperature reaches the critical value of the temperature-sensitive bimetal plate, the temperature-sensitive bimetal plate deforms to turn off or on the circuit.

[0003] Furthermore, when effective control of the controlled temperature cannot be obtained, in order to prevent damage to the equipment, a fuse can be connected in series to the control circuit to turn off the circuit, or a fusing element can be added to the thermostat. When the temperature exceeds the melting point, the fusing element directly turns off the internal circuit of the thermostat, and the control circuit cannot turn on again, achieving one-time overheat protection.

[0004] The temperature control fusing protector disclosed in Chinese Patent CN202601519U includes a cylindrical first housing, a fusing protection structure, a first wire, a rectangular second housing, a temperature control protection structure, and a second wire. The first housing covers the fusing protection structure with epoxy resin and paraffin located at the upper part of the first housing. The first wire is connected to one end of the fusing protection structure. The fusing protection structure covers the second housing. The second housing covers the temperature control protection structure. The other end of the fusing protection structure is connected to the non-wire connection end of the temperature control protection structure. The wire connection end of the temperature control protection structure is connected to the second wire.

[0005] The above-mentioned temperature-controlled fuse protector integrates temperature control and fuse-cutting functions, has a relatively compact layout of circuit control components, and can switch off the temperature control circuit when the temperature control fails. However, its fuse-cutting protection structure is a fuse, which cannot be reused after blowing, the thermostat also breaks down at the same time, and it is costly.

[0006] Currently, in situations where it is necessary to monitor ambient temperature, conventional contact thermostats have a slow thermal response rate and are sluggish.

[0007] Therefore, conventional technologies have room for improvement and development. [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention aims to provide an overheat recovery stopper protector that addresses the shortcomings and problems of the prior art, is structurally rational, sensitive to ambient temperature, can provide one-time overheat protection, and is reusable. [Means for solving the problem]

[0009] To achieve the above objective, the present invention employs the following technical solutions.

[0010] The overheat recovery stopper protector according to the present invention includes a base, on which a first electrical terminal, a second electrical terminal, a spring piece, and a temperature-sensing piece are provided. The first end of the spring piece is fixedly connected to the first electrical terminal, the second end of the spring piece is installed corresponding to the second electrical terminal, the temperature-sensing piece is installed above the spring piece, the first end of the temperature-sensing piece is fitted and connected to the first electrical terminal, the second end of the temperature-sensing piece is fitted and connected to the second end of the spring piece, and a recovery stopper structure is provided on the base, which is fitted and connected to the second end of the spring piece.

[0011] According to the above solution, the return stopper structure includes a return stopper elastic piece, the return stopper elastic piece is provided on the side of the second end of the temperature-sensing piece, the first end of the return stopper elastic piece is fixedly connected to the base, a limit hook is provided on the second end of the return stopper elastic piece, the second end of the spring piece is set to abut against the limit hook, and the spring piece can be driven to move the limit hook toward the return stopper elastic piece when deformed, thereby causing the second end of the spring piece to pass over the limit hook and be hooked onto the limit hook.

[0012] According to the above solution, the limit hook and the return-stopping elastic piece are a single structure formed by bending, and the limit hook and the return-stopping elastic piece constitute a "V" shaped deformable structure, and the spring piece can be driven to deform the limit hook toward the return-stopping elastic piece when deformed, thereby the second end of the spring piece is hooked onto the limit hook.

[0013] According to the above solution, a nose plate is provided on the base, the nose plate is installed opposite the second end of the spring piece, the return-stopping elastic piece is attached to the nose plate, and thereby the limit hook is fitted and connected to the spring piece.

[0014] According to the above solution, the present invention further includes a bracket, the first end of which is fixedly connected to a base, the bracket is provided above a temperature-sensing piece, the second end of which is fixedly connected to a nose plate, a fixing sheet is provided on the first end of the return-stopping elastic piece, the fixing sheet is fixedly connected to the bracket, thereby the return-stopping elastic piece is attached to and installed on the nose plate.

[0015] According to the above solution, a hollow groove is provided in the bracket.

[0016] According to the above solution, the present invention further includes a dedicated tool, wherein a return groove is provided in the connection portion between the nose plate and the bracket, and the dedicated tool can pass through the return groove to pull the limit hook and move it toward the return stopper elastic piece.

[0017] According to the above solution, the first electrical terminal and the bracket are riveted to the first end of the base by a first rivet, a fixed contact is provided at the second end of the base, the fixed contact and the second electrical terminal are riveted together by a second rivet, a movable contact is provided at the second end of the spring piece, and the movable contact and the fixed contact are installed in correspondence vertically.

[0018] According to the above solution, the present invention further includes a housing, the housing covering the bottom surface, left and right end surfaces and front and rear sides of the base, the upper end of the housing being provided as an opening, and the first electrical terminal and the second electrical terminal being drilled into the left and right end walls of the housing, respectively.

[0019] According to the above solution, a fixing sheet is provided at the first end of the return-stopping elastic piece, a socket is provided at the second end of the base, a locking device is provided in the socket that engages with it, the fixing sheet is drilled between the locking device and the socket, and the locking device and the socket engage and connect to fix the return-stopping elastic piece to the socket. [Effects of the Invention]

[0020] The beneficial effects of the present invention are as follows: The present invention has a rational structure in which the first electrical terminal, the spring piece, and the second electrical terminal are electrically connected in order, and by installing the temperature-sensing piece in an exposed manner, sensitivity to ambient temperature can be increased. When the temperature reaches a critical value, the temperature-sensing piece can turn off the circuit by turning off the connection between the spring piece and the second electrical terminal. Due to the deformation of the temperature-sensing piece, the spring piece can overcome the return stopper structure and engage with it, preventing the temperature-sensing piece from deforming again and returning the spring piece to its original position, thereby realizing a one-time overheat protection function. [Brief explanation of the drawing]

[0021] [Figure 1] It is a schematic diagram of the overall cross-sectional structure of Example 1 of the present invention. [Figure 2] It is a schematic diagram of the structure in which the temperature-sensitive piece of Example 1 of the present invention fits with the return stop elastic piece after deformation. [Figure 3] It is a schematic diagram of the overall cross-sectional structure of Example 2 of the present invention. [Figure 4] It is a schematic diagram of the structure in which the temperature-sensitive piece of Example 2 of the present invention fits with the return stop elastic piece after deformation.

Mode for Carrying Out the Invention

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

[0023] Example 1

[0024] As shown in FIGS. 1 to 2, the overheat return stop protector described in the present invention includes a base 1, and a first electrical terminal 11, a second electrical terminal 12, a spring piece 2, and a temperature-sensitive piece 21 are provided on the base 1. The first end of the spring piece 2 is fixedly connected to the first electrical terminal 11, the second end of the spring piece 2 is installed corresponding to the second electrical terminal 12, the temperature-sensitive piece 21 is installed above the spring piece 2, the first end of the temperature-sensitive piece 21 is fitted and connected to the first electrical terminal 11, the second end of the temperature-sensitive piece 21 is fitted and connected to the second end of the spring piece 2, and a return stop structure is provided on the base 1. The return stop structure is fitted and connected to the second end of the spring piece 2. The base 1, the first electrical terminal 11, the spring piece 2, and the second electrical terminal 12 constitute a main structure. The first electrical terminal 11 and the second electrical terminal 12 are used to be connected to a control circuit. The second end of the spring piece 2 can operate to fit with the second electrical terminal 12, thereby changing the on / off of the control circuit.

[0025] Preferably, the temperature-sensing piece 21 of the present invention is exposed to the environment and is more sensitive to changes in the ambient temperature. When the temperature exceeds a critical value, the temperature-sensing piece 21 deforms rapidly, thereby causing the second end of the spring piece 2 to separate from the second electrical terminal 12. After the temperature-sensing piece 21 deforms due to heat, the entire temperature-sensing piece 21 bends, its second end flips upward, and the second end of the spring piece 2 is hooked into the return retaining structure and fitted together, based on the fact that the first end of the temperature-sensing piece 21 is connected to the first electrical terminal 11.

[0026] Furthermore, after the cooling of the temperature-sensing piece 21 begins, the temperature-sensing piece 21 deforms again, but the second end of the spring piece 2 is fitted and connected to the return-stopping structure, which can restrict the spring piece 2 from returning to its original shape, thereby achieving one-time overheat protection. The thermal deformation principle of the temperature-sensing piece 21 is the same as that of conventional bimetallic plates / shape memory alloys, and therefore will not be explained again here.

[0027] The return stopper structure includes a return stopper elastic piece 3, which is provided on the side of the second end of the temperature-sensing piece 21. The first end of the return stopper elastic piece 3 is fixedly connected to the base 1. A limit hook 31 is provided on the second end of the return stopper elastic piece 3. The second end of the spring piece 2 is installed in contact with the limit hook 31. When the temperature-sensing piece 21 deforms, it can be driven to move the limit hook 31 toward the return stopper elastic piece 3, thereby causing the second end of the spring piece 2 to extend beyond the limit hook 31 and be hooked onto the limit hook 31. The return stopper elastic piece 3 is used to install the limit hook 31 attached to the side of the second end of the spring piece 2, and to install the limit hook 31 and the spring piece 2 facing each other.

[0028] The limit hook 31 can move toward the return-stopping elastic piece 3, and the movement of the limit hook 31 requires force as a drive, and of course, the limit hook 31 can return to its initial state when no force is applied. Specifically, the temperature-sensing piece 21 deforms due to heat, causing a jump movement, and because the first end of the temperature-sensing piece 21 is restricted by the first electrical terminal 11, the temperature-sensing piece 21 bends and deforms, thereby causing its second end to bend upward, which moves the second end of the spring piece 2 to push the limit hook 31 from below, moving the limit hook 31 toward the return-stopping elastic piece 3, and the spring piece 2 moves past the end of the limit hook 31 and separates from it. After that, the limit hook 31 can return to its initial position, at which point the end of the limit hook 31 abuts against the spring piece 2 to prevent downward return, and the second end of the spring piece 2 and the second electrical terminal 12 remain disconnected, thereby achieving the purpose of one-time overheat protection.

[0029] The limit hook 31 and the return-stopping elastic piece 3 are a single, bent-formed structure, and the limit hook 31 and the return-stopping elastic piece 3 form a "V" shaped deformable structure. When the temperature-sensing piece 21 deforms, it can drive the limit hook 31 toward the return-stopping elastic piece 3, thereby causing the second end of the spring piece 2 to hook onto the limit hook 31. Similarly, in the "V" shaped arrangement of the limit hook 31 and the return-stopping elastic piece 3, the limit hook 31 can move toward the return-stopping elastic piece 3, and in the absence of external force, the limit hook 31 can return to its original position on its own. Specifically, the limit hook 31 and the return-stopping elastic piece 3 are processed into a "V" shape by a bending process, and this structure is elastic, so that the force acting due to the deformation of the temperature-sensing piece 21 can overcome the yield strength of the "V" shape structure, causing the limit hook 31 to move toward the return-stopping elastic piece 3, that is, the opening of the "V" structure to close, and the second end of the spring piece 2 to pass over the end of the limit hook 31. To understand this, when the temperature-sensing piece 21 deforms due to heat, the movement of the second end of the spring piece 2 corresponds to jumping over the end of the limit hook 31, after which the limit hook 31 can return to its original position and abut against the spring piece 2, separating the second end of the temperature-sensing piece 21 and the spring piece 2 from the second electrical terminal 12, so that even if the temperature-sensing piece 21 deforms again after cooling, it will be supported by the limit hook 31 and will separate the spring piece 2 from the second electrical terminal 12.

[0030] A nose plate 4 is provided on the base 1, and the nose plate 4 is installed opposite the second end of the spring piece 2. The return-stopping elastic piece 3 is attached to the nose plate 4, thereby fitting and connecting the limit hook 31 to the spring piece 2. The nose plate 4 is used to support the return-stopping elastic piece 3, so that when the limit hook 31 receives an acting force toward the return-stopping elastic piece 3, it moves toward the return-stopping elastic piece 3.

[0031] Furthermore, the present invention further includes a bracket 41, the first end of which is fixedly connected to the base 1, the bracket 41 is provided above the temperature-sensing piece 21, the second end of which is fixedly connected to the nose plate 4, and a fixing sheet 32 ​​is provided on the first end of the return-stopping elastic piece 3, the fixing sheet 32 ​​is fixedly connected to the bracket 41, thereby the return-stopping elastic piece 3 is attached to the nose plate 4. Preferably, the bracket 41 is provided above the temperature-sensing piece 21 and spaced apart from it, and the first end of the bracket 41 is fixed to the base 1 such that there is space for the deformation of the temperature-sensing piece 21 between the bracket 41 and the base 1. In particular, a mounting position can be provided on the bracket 41, thereby allowing the fixing sheet 32 ​​to be fixed to the bracket 41 by means of insertion, screwing, locking, etc.

[0032] Similarly, by installing the temperature-sensing element 21 in an exposed state, the element can better sense changes in ambient temperature and its sensitivity can be increased. Furthermore, a hollow groove 42 is provided in the bracket 41, and the hollow groove 42 is used to leave space, thereby allowing hot air in the environment to flow better over the temperature-sensing element 21 and ensuring the sensitivity of the element 21.

[0033] The present invention further includes a dedicated tool 5, the return groove 43 provided in the connection portion between the nose plate 4 and the bracket 41, the dedicated tool 5 can pass through the return groove 43 and pull the limit hook 31 and move it toward the return stop elastic piece 3. The dedicated tool 5 has one hook portion, and after inspection is complete, the dedicated tool 5 can be inserted into the return groove 43 to hook the limit hook 31, the dedicated tool 5 can pull the limit hook 31 toward the return stop elastic piece 3 and thereby return the spring piece 2, the overheat return stop protector described in the present invention can be reused, avoiding the cost problem of conventional cut protectors needing to be replaced again.

[0034] The first electrical terminal 11 and the bracket 41 are riveted to the first end of the base 1 by a first rivet 13, a fixed contact 14 is provided at the second end of the base 1, the fixed contact 14 and the second electrical terminal 12 are riveted together by a second rivet 15, a movable contact 22 is provided at the second end of the spring piece 2, and the movable contact 22 and the fixed contact 14 are installed in correspondence vertically. The second end of the spring piece 2 is usually provided with a bent projection to ensure electrical contact between the spring piece 2 and the second electrical terminal 12. Preferably, one fixed contact 14 is riveted to the second rivet 15, one movable contact 22 is provided on the spring piece 2, and the movable contact 22 and the fixed contact 14 are fitted together to further stabilize the electrical connection and avoid arc discharge phenomena.

[0035] Preferably, the present invention further includes a housing 16, the housing 16 covering the bottom surface, both left and right end surfaces and both front and rear side surfaces of the base 1, the upper end of the housing 16 being provided as an opening, and the first electrical terminal 11 and the second electrical terminal 12 being drilled into the left and right end walls of the housing 16, respectively. The housing 16 can better protect the electrical safety of each component of the base 1, and preferably the upper end of the housing 16 is provided as an opening, thereby enabling the temperature sensing piece 21 to sense changes in ambient air temperature better and increase thermal sensitivity without requiring a heat conducting element.

[0036] Example 2

[0037] As shown in Figures 3-4, the only difference between this embodiment and Embodiment 1 is as follows: A fixing sheet 32 ​​is provided at the first end of the return-stopping elastic piece 3, a socket 17 is provided at the second end of the base 1, a locking device 18 that engages with the socket 17 is provided on the socket 17, the fixing sheet is drilled between the locking device 18 and the socket 17, and the locking device 18 and the socket 17 engage and connect to fix the return-stopping elastic piece 3 to the socket 17.

[0038] The above are merely preferred embodiments of the present invention, and any equivalent changes or modifications made based on the structure, features and principles described in the claims of the present invention are all included within the scope of the claims of the present invention. [Explanation of Symbols]

[0039] 1. Base, 2. Spring piece, 3. Return stopper elastic piece, 4. Nose plate, 5. Special tool, 11. First electrical terminal, 12. Second electrical terminal, 13. First rivet, 14. Fixed contact, 15. Second rivet, 16. Housing, 17. Socket, 18. Locking device, 21. Temperature sensing piece, 22. Movable contact, 31. Limit hook, 32. Fixing sheet, 41. Bracket, 42. Hollow groove, 43. Return groove.

Claims

1. An overheating recovery protection device comprising a base (1), wherein the base (1) is provided with a first electrical terminal (11), a second electrical terminal (12), a spring piece (2), and a temperature-sensing piece (21), the first end of the spring piece (2) being fixedly connected to the first electrical terminal (11), and the second end of the spring piece (2) being installed in correspondence with the second electrical terminal (12), wherein the temperature-sensing piece (21) is installed above the spring piece (2), the first end of the temperature-sensing piece (21) is fitted and connected to the first electrical terminal (11), the second end of the temperature-sensing piece (21) is fitted and connected to the second end of the spring piece (2), and the base (1) is provided with a recovery mechanism, the recovery mechanism being fitted and connected to the second end of the spring piece (2).

2. The overheating prevention protector according to claim 1, characterized in that the return prevention structure includes a return prevention elastic piece (3), the return prevention elastic piece (3) is provided on the side of the second end of the temperature sensing piece (21), the first end of the return prevention elastic piece (3) is fixedly connected to the base (1), a limit hook (31) is provided on the second end of the return prevention elastic piece (3), the second end of the spring piece (2) is set to abut against the limit hook (31), and when the spring piece (2) deforms, it can be driven to move the limit hook (31) toward the return prevention elastic piece (3), thereby the second end of the spring piece (2) goes beyond the limit hook (31) and is hooked onto the limit hook (31).

3. The overheating return protector according to claim 2, characterized in that the limit hook (31) and the return-stopping elastic piece (3) are a single-piece structure formed by bending, the limit hook (31) and the return-stopping elastic piece (3) constitute a "V"-shaped deformable structure, and the spring piece (2) can be driven to deform the limit hook (31) toward the return-stopping elastic piece (3) when deformed, thereby the second end of the spring piece (2) is hooked onto the limit hook (31).

4. The overheating return protector according to claim 3, characterized in that a nose plate (4) is provided on the base (1), the nose plate (4) is installed opposite to the second end of the spring piece (2), the return stop elastic piece (3) is attached to the nose plate (4), and thereby the limit hook (31) is fitted and connected to the spring piece (2).

5. The overheating return protector according to claim 4, further comprising a bracket (41), wherein the first end of the bracket (41) is fixedly connected to the base (1), the bracket (41) is provided above the temperature sensing piece (21), the second end of the bracket (41) is fixedly connected to the nose plate (4), and a fixing sheet (32) is provided on the first end of the return-stopping elastic piece (3), the fixing sheet (32) is fixedly connected to the bracket (41), thereby the return-stopping elastic piece (3) is attached to the nose plate (4).

6. The overheat recovery prevention protector according to claim 5, characterized in that a hollow groove (42) is provided in the bracket (41).

7. The overheating return stop protector according to claim 5, further comprising a dedicated tool (5), wherein a return groove (43) is provided in the connection portion between the nose plate (4) and the bracket (41), and the dedicated tool (5) can pass through the return groove (43) to pull the limit hook (31) and move it toward the return stop elastic piece (3).

8. The overheat recovery stopper protector according to claim 1, characterized in that the first electrical terminal (11) and the bracket (41) are riveted to the first end of the base (1) by a first rivet (13), a fixed contact (14) is provided at the second end of the base (1), the fixed contact (14) and the second electrical terminal (12) are riveted together by a second rivet (15), a movable contact (22) is provided at the second end of the spring piece (2), and the movable contact (22) and the fixed contact (14) are installed in correspondence vertically.

9. The overheat recovery stopper protector according to claim 1, further comprising a housing (16), wherein the housing (16) covers the bottom surface, left and right end surfaces and front and rear sides of the base (1), the upper end of the housing (16) is provided as an opening, and the first electrical terminal (11) and the second electrical terminal (12) are respectively drilled in the left and right end walls of the housing (16).

10. The overheating prevention protector according to claim 3, characterized in that a fixing sheet (32) is provided at the first end of the return-preventing elastic piece (3), a socket (17) is provided at the second end of the base (1), a locking device (18) that engages with the socket (17) is provided at the socket (17), the fixing sheet is drilled between the locking device (18) and the socket (17), and the locking device (18) and the socket (17) engage and connect to fix the return-preventing elastic piece (3) to the socket (17).

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