Overheat resuming protector

Abstract

The invention relates to the technical field of temperature controllers, in particular to an overheating 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; the temperature sensor is reasonable in structure, the temperature sensing piece is exposed, the sensitivity of the temperature sensor to the environment temperature can be improved, and when the temperature reaches a critical value, the temperature sensing piece can drive the reed to be disconnected so as to cut off a 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 invention relates to the technical field of temperature controllers, in particular to an overheating reset protector. Background Art

[0002] Thermostat refers to a series of automatic control elements that produce certain special effects and conduction or disconnection actions by physically deforming the switch inside according to the temperature changes in the working environment. Its working principle is to automatically sample and monitor the ambient temperature through temperature sensing components, and control the circuit to start / shut down when the ambient temperature is higher than the control set value. The common jump-type thermostat is a contact temperature sensor that needs to be installed on the surface of the heating element. The heat is transferred to the temperature-sensitive double gold sheet through the shell or heat-conducting element. When the temperature reaches the critical value of the temperature-sensitive double gold sheet, the temperature-sensitive double gold sheet is deformed to cut off or conduct 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 control 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 control protection structure, the other end of the fuse protection structure is connected to the non-wire connection end of the temperature control protection structure, and the wire connection end of the temperature control 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 wire, which cannot be reused after fusing, so that the temperature controller is also damaged at the same time, which is very costly.

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

[0007] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0008] The purpose of the present invention is to provide a reusable overheat protection device which has a reasonable structure, is sensitive to ambient temperature, can realize one-time overheat protection, and is reusable.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An overheating stop-reset protector described in the present invention includes a base, on which a first power connection terminal, a second power connection terminal, a reed and a temperature-sensitive sheet 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 sheet is arranged above the reed, the first end of the temperature-sensitive sheet is cooperatively connected to the first power connection terminal, and the second end of the temperature-sensitive sheet 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 sheet, which is arranged on one side of the second end of the temperature-sensitive sheet, and the first end of the anti-return spring sheet is fixedly connected to the base; a limit hook is provided on the second end of the anti-return spring sheet, and the second end of the spring sheet is in contact with the limit hook; when the spring sheet is deformed, the limit hook can be driven to move toward the anti-return spring sheet, so that the second end of the spring sheet 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 sheet are an integrated structure formed by bending, and the limit hook and the anti-return spring sheet constitute a "V"-shaped deformable structure. When the spring sheet is deformed, the limit hook can be driven to deform toward the anti-return spring sheet, 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 spring sheet. The anti-return spring sheet is fitted on the nose support plate so that the limit hook is matched and connected with the spring sheet.

[0014] According to the above scheme, the present invention 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 sheet, and the fixing page is fixedly connected to the bracket so that the anti-return spring sheet is arranged in contact with the nose pad.

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

[0016] According to the above scheme, the present invention 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 sheet.

[0017] According to the above scheme, the first power connection 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 and the second power connection terminal are riveted 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 present invention also includes a shell, which covers the bottom surface, left and right end surfaces and front and rear side surfaces of the base, and the upper end of the shell is open, and the first power connection terminal and the second power connection terminal are respectively penetrated through 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 sheet, a socket is provided on the second end of the base, and a fastener matching therewith 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 sheet on the socket.

[0020] The beneficial effects of the present invention are as follows: the present invention has a reasonable structure, the first power connection terminal, the reed and the second power connection terminal 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 terminal to cut off the circuit; the deformation action of the temperature sensing piece can make the reed jump to the stop structure to form a matching connection with it, preventing the temperature sensing piece from deforming again to reset the reed, thereby realizing a one-time overheating protection function. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a schematic diagram of the structure of the temperature-sensing piece after deformation and the anti-return spring piece according to Example 1 of the present invention;

[0023] Figure 3 is a schematic diagram of the overall cross-sectional structure of Embodiment 2 of the present invention;

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

[0025] In the figure:

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

[0027] The technical solution of the present invention is described below in conjunction with the accompanying drawings and embodiments.

[0028] Example 1

[0029] like Figure 1-2 As shown, an overheating stop-reset protector described in the present invention comprises a base 1, on which a first power terminal 11, a second power terminal 12, a spring 2 and a temperature-sensitive sheet 21 are provided, 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 matched with the second power terminal 12; the temperature-sensitive sheet 21 is arranged above the spring 2, the first end of the temperature-sensitive sheet 21 is matched with the first power terminal 11, and the second end of the temperature-sensitive sheet 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 a main structure, wherein the first power terminal 11 and the second power terminal 12 are used to connect a control circuit, and the second end of the spring 2 can move to match with the second power terminal 12, thereby changing the on-off of the control circuit.

[0030] The preferred temperature sensing piece 21 of the present invention is exposed to the environment and responds more sensitively to the temperature change in the environment. When the temperature exceeds the critical value, the temperature sensing piece 21 is rapidly deformed, thereby driving the second end of the spring piece 2 to separate from the second power connection end 12. After the temperature sensing piece 21 is deformed by heat, the first end of the temperature sensing piece 21 is connected to the first power connection end 11 as a basis, the temperature sensing piece 21 is warped as a whole so that its second end turns upward, and the second end of the spring piece 2 is hooked on the stop structure to form a mating connection.

[0031] Furthermore, after the temperature sensing piece 21 starts to cool, the temperature sensing piece 21 deforms again, but the second end of the spring 2 is connected with the stop structure, and the stop structure can limit the spring 2 from resetting again, thereby achieving a one-time overheating protection. The thermal deformation principle of the temperature sensing piece 21 is the same as that of the existing double gold sheet / memory metal, so it is not repeated 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-sensitive sheet 21, and the first end of the anti-return spring piece 3 is fixedly connected to the base 1; a limit hook 31 is arranged on the second end of the anti-return spring piece 3, and the second end of the spring sheet 2 is arranged to abut against the limit hook 31; when the temperature-sensitive sheet 21 is deformed, the limit hook 31 can be driven to move toward the anti-return spring piece 3, so that the second end of the spring sheet 2 passes over the limit hook 31 and is hooked on the limit hook 31. The anti-return spring piece 3 is used to install and arrange the limit hook 31 on one side of the second end of the spring sheet 2, so that the limit hook 31 is arranged opposite to the spring sheet 2.

[0033] The limit hook 31 can move toward the anti-return spring sheet 3. The movement of the limit hook 31 requires a force as a drive. Of course, the limit hook 31 can also return to its initial state without being subjected to force. Specifically, the temperature-sensitive sheet 21 will produce a sudden jump action when it is deformed by heat. The first end of the temperature-sensitive sheet 21 is restricted by the first power terminal 11. The temperature-sensitive sheet 21 produces a reverse bending deformation so that its second end tilts upward, driving the second end of the spring sheet 2 to push the limit hook 31 from below, so that the limit hook 31 moves toward the anti-return spring sheet 3, and the spring sheet 2 passes over the end of the limit hook 31 and separates from it. Then the limit hook 31 can return to its initial position. At this time, the end of the limit hook 31 touches the spring sheet 2 to prevent it from resetting downward, and the second end of the spring sheet 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 sheet 3 are an integral structure formed by bending, and the limit hook 31 and the anti-return spring sheet 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 sheet 3, so that the second end of the spring sheet 2 is hooked on the limit hook 31. As mentioned above, the limit hook 31 and the anti-return spring sheet 3 are arranged in a "V" shape, so that the limit hook 31 can move toward the anti-return spring sheet 3, and the limit hook 31 can reset itself without the action of external force. Specifically, the limit hook 31 and the anti-return spring sheet 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, so that the limit hook 31 moves toward the anti-return spring sheet 3, that is, the opening of the "V" structure tends to close, so that the second end of the spring sheet 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 resetting, 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 keeps a distance from the second power terminal 12.

[0035] The base 1 is provided with a nose support plate 4, which is arranged opposite to the second end of the spring sheet 2, and the anti-return spring sheet 3 is arranged on the nose support plate 4 so that the limit hook 31 is connected with the spring sheet 2. The nose support plate 4 is used to support the anti-return spring sheet 3, so that when the limit hook 31 is subjected to a force acting toward the anti-return spring sheet 3, the limit hook 31 moves toward the anti-return spring sheet 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 arranged above the temperature-sensitive sheet 21, and the second end of the bracket 41 is fixedly connected to the nose pad 4; a fixing page 32 is arranged 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 pad 4. The bracket 41 is preferably arranged above the temperature-sensitive sheet 21 and spaced therefrom, and the first end of the bracket 41 is fixed to the base 1, so that a deformation movement space for the temperature-sensitive sheet 21 is left between the bracket 41 and the base 1. In particular, an installation position can be arranged on the bracket 41 so that the fixing page 32 can be fixed to the bracket 41 by plugging, screws, snaps, etc.

[0037] As mentioned above, the temperature sensing sheet 21 is exposed so that the temperature sensing sheet 21 can better sense the change of the ambient temperature and improve the sensitivity. Furthermore, the bracket 41 is provided with a hollow groove 42, which is used to leave space so that the hot air in the environment can better flow through the temperature sensing sheet 21, thereby ensuring the sensitivity of the temperature sensing sheet 21.

[0038] The present invention further comprises 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, and the special tool 5 can pass through the reset groove 43 to pull the limit hook 31 to move toward the anti-reset spring sheet 3. The special tool 5 has a hook portion, and when the inspection is completed, the special tool 5 can be inserted into the reset groove 43 and hooked with the limit hook 31, and the special tool 5 pulls the limit hook 31 to move toward the anti-reset spring sheet 3, so that the spring sheet 2 can be reset, so that the overheating anti-reset protector of the present invention can be used again, avoiding the cost problem of the traditional fuse protector needing to be replaced again.

[0039] The first power connection terminal 11 and the bracket 41 are riveted to the first end of the base 1 through the first rivet 13; the second end of the base 1 is provided with a fixed contact 14, and the fixed contact 14 is riveted to the second power connection terminal 12 through the second rivet 15, and the second end of the spring 2 is provided with a moving contact 22, and the moving contact 22 is matched with the fixed contact 14 up and down. The second end of the spring 2 is usually provided with a bending protrusion to ensure the electrical contact connection between the spring 2 and the second power connection terminal 12. Preferably, a fixed contact 14 is riveted to the second rivet 15, and a moving contact 22 is provided on the spring 2. The cooperation between the moving contact 22 and the fixed contact 14 can make the electrical connection more stable and avoid sparking and arcing.

[0040] Preferably, the present invention further comprises a shell 16, 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 terminal 11 and the second power terminal 12 are respectively provided on the left and right end walls of the shell 16. The shell 16 can better protect the electrical safety of various components on the base 1, and preferably, the upper end of the shell 16 is open, so that the temperature sensing piece 21 does not need a heat conduction element, can better sense the change of air temperature in the environment, and improve thermal sensitivity.

[0041] Example 2

[0042] like Figure 3-4 As shown, the 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 matching therewith is provided on the socket 17; the fixing page is passed through between 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, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

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

2. The overheat protection device according to claim 1, characterized in that: The anti-return structure comprises an anti-return spring sheet (3), the anti-return spring sheet (3) is arranged on one side of the second end of the temperature-sensitive sheet (21), and the first end of the anti-return spring sheet (3) is fixedly connected to the base (1); a limit hook (31) is arranged on the second end of the anti-return spring sheet (3), and the second end of the spring sheet (2) is arranged to abut against the limit hook (31); when the spring sheet (2) is deformed, the limit hook (31) can be driven to move toward the anti-return spring sheet (3), so that the second end of the spring sheet (2) passes over the limit hook (31) and is hooked on the limit hook (31).

3. The overheat protection device according to claim 2, characterized in that: The limit hook (31) and the anti-return spring sheet (3) are an integrated structure formed by bending, and the limit hook (31) and the anti-return spring sheet (3) form a "V"-shaped deformable structure. When the spring sheet (2) is deformed, the limit hook (31) can be driven to deform toward the anti-return spring sheet (3), so that the second end of the spring sheet (2) is hooked on the limit hook (31).

4. The overheat protection device according to claim 3, characterized in that: The base (1) is provided with a nose support plate (4), the nose support plate (4) and the second end of the spring plate (2) are arranged opposite to each other, and the anti-return spring plate (3) is arranged on the nose support plate (4) so ​​that the limit hook (31) is connected with the spring plate (2) in a coordinated manner.

5. The overheat protection device according to claim 4, characterized in that: The invention also comprises 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 arranged 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 close contact with the nose support plate (4).

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

7. The overheat protection device according to claim 5, characterized in that: The invention also comprises a special tool (5), wherein a reset groove (43) is provided on the connection portion between the nose support plate (4) and the bracket (41), and 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 overheat protection device 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) 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 connection terminal (12) via 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 overheat protection device according to claim 1, characterized in that: It also includes a shell (16), 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 arranged on the left and right end walls of the shell (16).

10. The overheat protection device according to claim 3, characterized in that: A fixing page (32) is provided on the first end of the anti-return spring sheet (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 so that the anti-return spring sheet (3) is fixed on the socket (17).

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