Overheat resuming protector

Abstract

The utility model relates to the technical field of temperature controllers, in particular to an overheat resuming protector. Comprising a base, the base is provided with a first power connection end, a second power connection end, a reed and a temperature sensing piece, the first end of the reed is fixedly connected with the first power connection end, and the second end of the reed and the second power connection end are arranged in a paired mode; the temperature sensing piece is arranged above the reed, the first end of the temperature sensing piece is connected with the first power connection end in a matched mode, and the second end of the temperature sensing piece is connected with the second end of the reed in a matched mode. A reset stopping structure is arranged on the base, and the reset stopping structure is connected with the second end of the reed in a matched mode; according to the utility model, the structure is reasonable, the temperature sensing sheet is exposed, the sensitivity of the temperature sensing sheet to the ambient temperature can be improved, and when the temperature reaches a critical value, the temperature sensing sheet can drive the reed to disconnect so as to cut off the circuit; the deformation action of the temperature sensing piece enables the reed to jump to the reset stopping structure to form matched connection with the reset stopping structure, the temperature sensing piece is prevented from deforming again to enable the reed to reset, and therefore the one-time overheating protection function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature controllers, in particular to an overheating reset protector. Background Art

[0002] A thermostat is a series of automatic control components that physically deform within a switch in response to ambient temperature changes, producing specific effects and switching the device on or off. They operate by automatically sampling and monitoring the ambient temperature through temperature sensing components. When the ambient temperature rises above a set point, the control circuit is activated or deactivated. A common snap-action thermostat is a contact-type temperature sensor that needs to be mounted on the surface of a heating element. It transfers heat to a dual-metal thermal strip through the housing or thermally conductive element. When the temperature reaches the critical value of the dual-metal strip, the strip deforms, disconnecting or opening the circuit.

[0003] Furthermore, when the controlled temperature cannot be effectively controlled, in order to prevent damage to the equipment, a fuse can be connected in series with the control circuit to cut off the circuit, or a fuse element can be added to the thermostat so that when the temperature exceeds the melting point, the fuse element directly cuts off the internal circuit of the thermostat, making it impossible for the control circuit to be turned on again, thereby achieving a one-time overheating protection.

[0004] For example, a temperature-controlled fuse protector disclosed in Chinese patent CN202601519U includes a cylindrical first shell, a fuse protection structure, a first wire, a rectangular second shell, a temperature-controlled protection structure and a second wire. The first shell encloses the fuse protection structure through epoxy resin and paraffin located on the top of the first shell. The first wire is connected to one end of the fuse protection structure. The fuse protection structure encloses the second shell. The second shell encloses the temperature-controlled protection structure. The other end of the fuse protection structure is connected to the non-wire connection end of the temperature-controlled protection structure, and the wire connection end of the temperature-controlled protection structure is connected to the second wire.

[0005] The above-mentioned temperature control fuse protector integrates temperature control and fusing functions, making the layout of circuit control components more compact and being able to cut off the temperature control circuit when temperature control fails. However, its fusing protection structure is a fuse, which cannot be reused after fusing, so the temperature controller is also damaged, which is very costly.

[0006] In some current scenarios where ambient temperature monitoring is required, the existing contact-type thermostat has a slow thermal response speed and is sluggish in its reaction.

[0007] Therefore, the existing technology still needs to be improved and developed. Utility Model Content

[0008] The purpose of this utility model is to provide a reusable overheating protection device with reasonable structure, sensitive response to ambient temperature, and one-time overheat protection.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] The utility model describes an overheating stop-reset protector, comprising a base, on which a first power connection terminal, a second power connection terminal, a reed and a temperature-sensitive plate are provided. The first end of the reed is fixedly connected to the first power connection terminal, and the second end of the reed is paired with the second power connection terminal; the temperature-sensitive plate is arranged above the reed, the first end of the temperature-sensitive plate is cooperatively connected to the first power connection terminal, and the second end of the temperature-sensitive plate is cooperatively connected to the second end of the reed; a stop-reset structure is provided on the base, and the stop-reset structure is cooperatively connected to the second end of the reed.

[0011] According to the above scheme, the anti-return structure includes an anti-return spring plate, which is arranged on one side of the second end of the temperature-sensitive plate, and the first end of the anti-return spring plate is fixedly connected to the base; a limit hook is provided on the second end of the anti-return spring plate, and the second end of the spring plate is arranged to be in contact with the limit hook; when the spring plate is deformed, the limit hook can be driven to move toward the anti-return spring plate, so that the second end of the spring plate passes over the limit hook and hooks on the limit hook.

[0012] According to the above scheme, the limit hook and the anti-return spring are an integrated structure formed by bending, and the limit hook and the anti-return spring constitute a "V"-shaped deformable structure. When the spring sheet is deformed, it can drive the limit hook toward the anti-return spring sheet to deform, so that the second end of the spring sheet is hooked on the limit hook.

[0013] According to the above solution, a nose support plate is provided on the base, and the nose support plate is arranged opposite to the second end of the reed. The anti-return spring is fitted on the nose support plate so that the limit hook is matched with the reed.

[0014] According to the above scheme, the utility model also includes a bracket, the first end of which is fixedly connected to the base, the bracket is arranged above the temperature sensing plate, and the second end of the bracket is fixedly connected to the nose pad; a fixing page is provided on the first end of the anti-return spring plate, and the fixing page is fixedly connected to the bracket so that the anti-return spring plate is fitted with the nose pad.

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

[0016] According to the above solution, the utility model also includes a special tool. A reset groove is provided on the connection portion between the nose pad and the bracket. The special tool can pass through the reset groove to pull the limit hook toward the anti-return spring piece.

[0017] According to the above solution, the first power terminal and the bracket are riveted to the first end of the base through a first rivet; a fixed contact is provided on the second end of the base, and the fixed contact is riveted to the second power terminal through a second rivet; a moving contact is provided on the second end of the spring leaf, and the moving contact and the fixed contact are arranged in a pair up and down manner.

[0018] According to the above scheme, the utility model also includes a shell, which covers the bottom surface, left and right end surfaces, and front and rear side surfaces of the base. The upper end of the shell is open, and the first power connection end and the second power connection end are respectively arranged on the left and right end walls of the shell.

[0019] According to the above scheme, a fixing page is provided on the first end of the anti-return spring piece, a socket is provided on the second end of the base, and a fastener that matches it is provided on the socket; the fixing page is passed through between the fastener and the socket, and the fastener is matched with the socket to fix the anti-return spring piece on the socket.

[0020] The beneficial effects of the utility model are as follows: the utility model has a reasonable structure, the first power connection end, the reed and the second power connection end are electrically connected in sequence, the exposed setting of the temperature sensing piece can improve its sensitivity to the ambient temperature, when the temperature reaches a critical value, the temperature sensing piece can drive the reed to disconnect from the second power connection end, thereby cutting off the circuit; the deformation action of the temperature sensing piece can cause the reed to jump to the stop structure to form a cooperative connection with it, preventing the temperature sensing piece from deforming again and causing the reed to reset, thereby realizing a one-time overheating protection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall cross-sectional structure of Example 1 of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the thermosensitive sheet in Example 1 of the present utility model after deformation and cooperation with the anti-return spring;

[0023] Figure 3 This is a schematic diagram of the overall cross-sectional structure of Example 2 of the present utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the temperature-sensing piece in Example 2 of the present invention after deformation and cooperation with the anti-return spring piece.

[0025] In the picture:

[0026] 1. Base; 2. Spring; 3. Anti-return spring; 4. Nose pad; 5. Special tool; 11. First power terminal; 12. Second power terminal; 13. First rivet; 14. Fixed contact; 15. Second rivet; 16. Housing; 17. Socket; 18. Fastener; 21. Temperature sensor; 22. Moving contact; 31. Limit hook; 32. Fixed page; 41. Bracket; 42. Hollow slot; 43. Reset slot. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model is described below with reference to the accompanying drawings and embodiments.

[0028] Example 1

[0029] like Figure 1-2 As shown, the overheating stop-reset protector described in the present invention includes a base 1, on which a first power terminal 11, a second power terminal 12, a spring 2, and a temperature-sensitive plate 21 are provided. The first end of the spring 2 is fixedly connected to the first power terminal 11, and the second end of the spring 2 is paired with the second power terminal 12. The temperature-sensitive plate 21 is arranged above the spring 2, and the first end of the temperature-sensitive plate 21 is matched with the first power terminal 11, and the second end of the temperature-sensitive plate 21 is matched with the second end of the spring 2. A stop-reset structure is provided on the base 1, and the stop-reset structure is matched with the second end of the spring 2. The base 1, the first power terminal 11, the spring 2, and the second power terminal 12 constitute the main structure. The first power terminal 11 and the second power terminal 12 are used to connect to the control circuit. The second end of the spring 2 can move to match the second power terminal 12, thereby changing the on / off state of the control circuit.

[0030] The preferred temperature-sensing plate 21 of the present invention is exposed to the environment and is more sensitive to temperature changes in the environment. When the temperature exceeds a critical value, the temperature-sensing plate 21 rapidly deforms, thereby driving the second end of the spring 2 to separate from the second power terminal 12. After the temperature-sensing plate 21 is deformed by heat, the first end of the temperature-sensing plate 21 is connected to the first power terminal 11 as a basis, and the temperature-sensing plate 21 is warped as a whole, causing its second end to flip upward. The second end of the spring 2 is hooked on the stop structure to form a mating connection.

[0031] Furthermore, after the temperature-sensing plate 21 begins to cool, it deforms again. However, the second end of the spring 2 is connected to the anti-return structure, which prevents the spring 2 from resetting, thereby achieving a one-time overheat protection. The thermal deformation principle of the temperature-sensing plate 21 is the same as that of existing double-metal / memory metals and will not be further described here.

[0032] The anti-return structure includes an anti-return spring piece 3, which is arranged on one side of the second end of the temperature-sensing plate 21. The first end of the anti-return spring piece 3 is fixedly connected to the base 1. A limit hook 31 is provided on the second end of the anti-return spring piece 3, and the second end of the spring 2 is arranged to abut against the limit hook 31. When the temperature-sensing plate 21 deforms, the limit hook 31 can be driven to move toward the anti-return spring piece 3, so that the second end of the spring 2 passes over the limit hook 31 and hooks on the limit hook 31. The anti-return spring piece 3 is used to install and set the limit hook 31 on one side of the second end of the spring 2, so that the limit hook 31 is arranged opposite the spring 2.

[0033] The limit hook 31 can move toward the anti-return spring 3. The movement of the limit hook 31 requires a force to drive it. Of course, the limit hook 31 can also return to its initial state when no force is applied. Specifically, the thermal deformation of the temperature-sensing plate 21 will produce a sudden action. The first end of the temperature-sensing plate 21 is restricted by the first power terminal 11, and the temperature-sensing plate 21 produces a reverse deformation, causing its second end to tilt upward, driving the second end of the spring 2 to push the limit hook 31 from below, causing the limit hook 31 to move toward the anti-return spring 3. The spring 2 passes over the end of the limit hook 31 and separates from it. The limit hook 31 can then return to its initial position. At this time, the end of the limit hook 31 contacts the spring 2 to prevent it from returning to its original position. The second end of the spring 2 remains disconnected from the second power terminal 12, thereby achieving a one-time overheating protection purpose.

[0034] The limit hook 31 and the anti-return spring 3 are an integral structure formed by bending. The limit hook 31 and the anti-return spring 3 constitute a "V"-shaped deformable structure. When the temperature-sensing piece 21 is deformed, the limit hook 31 can be driven to deform toward the anti-return spring 3, so that the second end of the spring 2 is hooked on the limit hook 31. As described above, the "V"-shaped limit hook 31 and the anti-return spring 3 allow the limit hook 31 to move toward the anti-return spring 3, and in the absence of external force, the limit hook 31 can reset itself. Specifically, the limit hook 31 and the anti-return spring 3 are processed into a "V"-shaped structure through a bending process, and the structure has elasticity, so that the force generated by the deformation of the temperature-sensing piece 21 can overcome the yield strength of the "V"-shaped structure, causing the limit hook 31 to move toward the anti-return spring 3, that is, the opening of the "V" structure tends to close, so that the second end of the spring 2 can pass over the end of the limit hook 31. It can be understood that when the temperature sensing piece 21 is deformed by heat, the action of driving the second end of the reed 2 is equivalent to jumping the end of the limit hook 31, and then the limit hook 31 can touch the reed 2 after it is reset, so that the second end of the temperature sensing piece 21 and the reed 2 are away from the second power terminal 12. Even if the temperature sensing piece 21 is deformed again after cooling, it is supported by the limit hook 31 so that the reed 2 maintains a distance from the second power terminal 12.

[0035] The base 1 is provided with a nose support plate 4, which is disposed opposite the second end of the spring 2. The anti-return spring 3 is fitted onto the nose support plate 4, thereby enabling the limit hook 31 to be engaged with the spring 2. The nose support plate 4 is used to support the anti-return spring 3, so that when the limit hook 31 is subjected to a force directed toward the anti-return spring 3, the limit hook 31 moves toward the anti-return spring 3.

[0036] Furthermore, the present invention also includes a bracket 41, the first end of which is fixedly connected to the base 1. The bracket 41 is located above the temperature sensor 21, and the second end of the bracket 41 is fixedly connected to the nose pad 4. The first end of the anti-recoil spring 3 is provided with a fixing page 32, which is fixedly connected to the bracket 41 so that the anti-recoil spring 3 is placed in contact with the nose pad 4. The bracket 41 is preferably located above the temperature sensor 21 and spaced therefrom. The first end of the bracket 41 is fixed to the base 1, leaving space between the bracket 41 and the base 1 for the temperature sensor 21 to deform. In particular, the bracket 41 can be provided with an installation position so that the fixing page 32 can be fixed to the bracket 41 by plugging, screwing, snapping, etc.

[0037] As mentioned above, the temperature sensor 21 is exposed, allowing it to better sense changes in ambient temperature and improve its sensitivity. Furthermore, the bracket 41 is provided with a hollow slot 42, which is used to leave space for hot air to flow through the temperature sensor 21, thereby ensuring its sensitivity.

[0038] The present invention also includes a special tool 5. A reset groove 43 is provided on the connection between the nose support plate 4 and the bracket 41. The special tool 5 can be inserted into the reset groove 43 to pull the limit hook 31 toward the anti-reset spring 3. The special tool 5 has a hook portion. After the inspection is completed, the special tool 5 can be inserted into the reset groove 43 and hooked with the limit hook 31. The special tool 5 pulls the limit hook 31 toward the anti-reset spring 3, thereby resetting the spring 2. This allows the overheating anti-reset protector of the present invention to be reused, avoiding the cost of replacing traditional fuse protectors.

[0039] The first power terminal 11 and the bracket 41 are riveted to the first end of the base 1 via a first rivet 13. A fixed contact 14 is provided on the second end of the base 1, and the fixed contact 14 is riveted to the second power terminal 12 via a second rivet 15. A movable contact 22 is provided on the second end of the spring 2, and the movable contact 22 is arranged in a pair with the fixed contact 14. The second end of the spring 2 is typically provided with a bent protrusion to ensure electrical contact between the spring 2 and the second power terminal 12. Preferably, a fixed contact 14 is riveted to the second rivet 15, and a movable contact 22 is provided on the spring 2. The movable contact 22 cooperates with the fixed contact 14 to make the electrical connection more stable and avoid sparking and arcing.

[0040] Preferably, the present invention further includes a housing 16, which covers the bottom, left and right end surfaces, and front and rear side surfaces of the base 1. The upper end of the housing 16 is open, and the first power terminal 11 and the second power terminal 12 are respectively provided through the left and right end walls of the housing 16. The housing 16 can better protect the electrical safety of the various components on the base 1. Preferably, the upper end of the housing 16 is open, so that the temperature sensor 21 does not need a heat conduction element, can better sense changes in the ambient air temperature, and improve thermal sensitivity.

[0041] Example 2

[0042] like Figure 3-4 As shown, the only difference between this embodiment and embodiment 1 is that a fixing page 32 is provided on the first end of the anti-return spring piece 3, a socket 17 is provided on the second end of the base 1, and a fastener 18 is provided on the socket 17 to match it; the fixing page is passed through the fastener 18 and the socket 17, and the fastener 18 is matched with the socket 17 to fix the anti-return spring piece 3 on the socket 17.

[0043] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. An overheating stop protector, comprising a base (1), wherein the base (1) is provided with a first power terminal (11), a second power terminal (12), a spring (2) and a temperature sensing piece (21), wherein the first end of the spring (2) is fixedly connected to the first power terminal (11), and the second end of the spring (2) is paired with the second power terminal (12); and characterized in that: The temperature sensing piece (21) is arranged above the spring (2), the first end of the temperature sensing piece (21) is connected to the first power terminal (11), and the second end of the temperature sensing piece (21) is connected to the second end of the spring (2); a stop structure is provided on the base (1), and the stop structure is connected to the second end of the spring (2).

2. The overheating stop protector according to claim 1, characterized in that: The anti-return structure comprises an anti-return spring piece (3), the anti-return spring piece (3) is arranged on one side of the second end of the temperature sensing piece (21), and the first end of the anti-return spring piece (3) is fixedly connected to the base (1); a limiting hook (31) is provided on the second end of the anti-return spring piece (3), and the second end of the spring piece (2) is arranged to contact the limiting hook (31); when the spring piece (2) is deformed, the limiting hook (31) can be driven to move toward the anti-return spring piece (3), so that the second end of the spring piece (2) passes over the limiting hook (31) and is hooked on the limiting hook (31).

3. The overheating stop protector according to claim 2, characterized in that: The limiting hook (31) and the anti-return spring (3) are an integral structure formed by bending. The limiting hook (31) and the anti-return spring (3) form a "V"-shaped deformable structure. When the spring (2) is deformed, the limiting hook (31) can be driven to deform toward the anti-return spring (3), thereby causing the second end of the spring (2) to be hooked on the limiting hook (31).

4. The overheating stop protector according to claim 3, characterized in that: The base (1) is provided with a nose support plate (4), which is arranged opposite to the second end of the reed (2), and the anti-return spring (3) is arranged on the nose support plate (4) so ​​that the limit hook (31) is connected with the reed (2).

5. The overheating protection device according to claim 4, characterized in that: The invention also includes a bracket (41), wherein a first end of the bracket (41) is fixedly connected to the base (1), the bracket (41) is arranged above the temperature sensing plate (21), and a second end of the bracket (41) is fixedly connected to the nose support plate (4); a fixing page (32) is provided on the first end of the anti-return spring sheet (3), and the fixing page (32) is fixedly connected to the bracket (41) so that the anti-return spring sheet (3) is arranged in contact with the nose support plate (4).

6. The overheating protection device according to claim 5, characterized in that: The bracket (41) is provided with a hollow groove (42).

7. The overheating protection device according to claim 5, characterized in that: The invention also includes a special tool (5), and a reset groove (43) is provided on the connection portion between the nose support plate (4) and the bracket (41). The special tool (5) can pass through the reset groove (43) to pull the limit hook (31) toward the anti-return spring sheet (3).

8. The overheating stop protector according to claim 1, characterized in that: The first power connection terminal (11) and the bracket (41) are riveted to the first end of the base (1) through a first rivet (13); a fixed contact (14) is provided on the second end of the base (1), and the fixed contact (14) is riveted to the second power connection terminal (12) through a second rivet (15); a moving contact (22) is provided on the second end of the spring leaf (2), and the moving contact (22) and the fixed contact (14) are arranged in a pair up and down manner.

9. The overheating protection device according to claim 1, characterized in that: The invention also includes a shell (16), wherein the shell (16) covers the bottom surface, left and right end surfaces, and front and rear side surfaces of the base (1); the upper end of the shell (16) is open, and the first power connection end (11) and the second power connection end (12) are respectively provided on the left and right end walls of the shell (16).

10. The overheating reset protector according to claim 3, characterized in that: A fixing page (32) is provided on the first end of the anti-return spring piece (3), a socket (17) is provided on the second end of the base (1), and a fastener (18) matched therewith is provided on the socket (17); the fixing page is passed between the fastener (18) and the socket (17), and the fastener (18) and the socket (17) are matched and connected to fix the anti-return spring piece (3) on the socket (17).

Images