A temperature control switch with a safety function

Abstract

A temperature control switch with a safety function includes a first conductive base, a second conductive base, a connecting base, a resettable heat-deformable component, a moving contact, and a fixed contact. The fixed contact is disposed on the second conductive base. One end of the heat-deformable component is fixed to the first conductive base, and the other end is fitted with a moving contact that is in constant contact with the fixed contact. The heat-deformable component undergoes elastic deformation, driving the moving contact to contact or move away from the fixed contact. The first conductive base is connected to the second conductive base via the connecting base. When the connecting base is heated above its material's heat resistance temperature, it undergoes plastic deformation and expansion, thereby driving the heat-deformable component to move and move the moving contact away from the fixed contact. Based on the above, this invention proposes a temperature control switch with a safety function that can disconnect when the circuit is abnormal and reconnect when normal operation is restored. Furthermore, in the event of a serious abnormality, it self-destructs, and the moving and fixed contacts remain separated.

Description

Technical Field

[0001] This invention relates to the field of micro switch technology, and in particular to a temperature control switch with a safety function. Background Technology

[0002] A thermostat is an automatic control element that, based on changes in the ambient temperature, undergoes internal physical deformation to produce specific effects, resulting in either switching on or off. It is also called a temperature switch, temperature protector, or temperature controller, and is often simply called a thermostat. Alternatively, the temperature protector transmits the temperature data to the temperature controller, which then issues a switching command to control the equipment's operation to achieve the desired temperature and energy-saving effect.

[0003] Existing temperature control switches generally disconnect when the temperature rises abnormally and reconnect when the temperature returns to normal. However, in extreme cases, such as sudden high temperature or high current, when the temperature exceeds the limits of the electrical equipment or the temperature controller, the temperature controller may malfunction and cause the electrical appliance to burn out. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature control switch with a safety function, which can disconnect when the circuit is abnormal and connect when it returns to normal. In the event of a serious abnormality, the switch will self-destruct, and the moving contact and the fixed contact will remain in a separated state.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A temperature control switch with a safety function includes a first conductive base, a second conductive base, a connecting base, a resettable heat-deformable component, a moving contact, and a fixed contact.

[0007] The fixed contact block is disposed on the second conductive base;

[0008] One end of the heat-deformable component is fixed on the first conductive base, and the other end is equipped with a movable contact block that is in constant contact with the fixed contact block. The heat-deformable component generates elastic deformation to drive the movable contact block to contact or move away from the fixed contact block.

[0009] The first conductive base is connected to the second conductive base through the connecting base. When the connecting base is heated above the material's heat resistance temperature, it will undergo plastic deformation and expansion, thereby driving the heated deformed part to move and move the moving contact away from the fixed contact.

[0010] Furthermore, the top of the connecting seat has a supporting boss that abuts against the middle of the heat-deformed member, and the first conductive seat includes a supporting part built into the supporting boss.

[0011] Specifically, the heat-deformable component includes a moving plate and a temperature plate;

[0012] One end of the moving piece is a fixed end; the fixed end is mounted on the first conductive base;

[0013] The other end of the moving piece is a swing end, which can swing up and down, and the swing end is equipped with the moving contact block;

[0014] One end of the temperature plate is fitted into the first conductive base, and the other end of the temperature plate is fitted into the swing end;

[0015] The temperature plate deforms in response to temperature changes, and the deformation of the temperature plate drives the swing end to swing.

[0016] Preferably, the first conductive base further includes a fixing part; the fixing part includes a fixing platform and a riveting protrusion, the riveting protrusion protruding from the top surface of the fixing platform;

[0017] The fixed end is provided with a positioning and mounting hole;

[0018] The mounting hole is fitted onto the riveting protrusion and the fixing part and the fixing end are fixedly connected by riveting.

[0019] Furthermore, the first conductive base also includes a first body and a first connecting portion;

[0020] The first conductive base has a first hollow portion through it;

[0021] The fixing part is located above the first hollow part.

[0022] The fixing part is connected to the first body through the first connecting part.

[0023] The fixing part is used to fix the fixing end;

[0024] The first connecting part is inclined;

[0025] The first body, the supporting part, the first connecting part, the fixing part, and the first hollow part are integrally formed structures;

[0026] The support portion protrudes from one side of the first body and faces the second conductive base.

[0027] Preferably, the fixed end is horizontally positioned, and the bottom surface of the fixed end is in contact with the top surface of the fixed platform;

[0028] The fixed end is provided with a positioning mounting hole and a first clearance hole;

[0029] The positioning mounting hole is used to install the fixed end into the mounting groove;

[0030] The first clearance hole is used to allow the first mounting block to pass through the fixed end;

[0031] The swing end is set at an angle;

[0032] The swing end is provided with a second clearance hole and a first contact block mounting hole;

[0033] The second clearance groove is used to allow the support portion to pass through the swing end;

[0034] The first contact mounting hole is used to mount the moving contact;

[0035] The top surface of the swing end has a second mounting block protruding from it, which is used to mount the temperature plate.

[0036] In some embodiments, the fixing part further includes a first locking block.

[0037] The first mounting block is located on the side of the fixing platform near the support portion, and the bent portion of the first mounting block has rounded corners.

[0038] The first mounting block is used to mount the repositionable heat-deformable component.

[0039] Specifically, the second conductive base includes a second body, a second connecting portion, and a mounting portion;

[0040] The second body has a second hollow section running through it;

[0041] The mounting part is located above the second hollowed-out part.

[0042] The mounting part is connected to the second body via the second connecting part;

[0043] The mounting part is provided with a second contact block mounting hole.

[0044] The second contact mounting hole is used to mount the fixed contact block;

[0045] The second connecting part is inclined;

[0046] The second body, the second connecting part, the mounting part and the second hollow part are integrally formed.

[0047] Specifically, the length of the temperature plate is greater than the mounting distance of the temperature plate.

[0048] Furthermore, reinforcing ribs are provided on both sides of the second clearance hole, and the reinforcing ribs protrude from the top surface of the swing end;

[0049] The temperature plate has mounting slots at both ends. The mounting slot is mounted on the first mounting block, and the other mounting slot is mounted on the second mounting block.

[0050] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0051] By using a resettable heat-deformable component and connector, a double-layer protection measure is implemented to safeguard the circuit and improve its safety performance. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0053] Figure 2 This is a front view structural diagram of one embodiment of the present invention;

[0054] Figure 3 This is a schematic diagram of the structure of the first conductive base according to one embodiment of the present invention;

[0055] Figure 4 This is a cross-sectional view of the first conductive base according to one embodiment of the present invention;

[0056] Figure 5 This is a schematic diagram of the structure of the second conductive base according to one embodiment of the present invention;

[0057] Figure 6 This is a schematic diagram of the structure of the moving piece according to one embodiment of the present invention;

[0058] Figure 7 This is a schematic diagram of the structure of a temperature plate according to one embodiment of the present invention;

[0059] The components include: first conductive base 1, first body 11, support part 12, first connecting part 13, fixing part 14, fixing platform 141, riveting protrusion 142, mounting groove 1421, first snap-fit ​​block 143, first hollow part 15, second conductive base 2, second body 21, second connecting part 22, mounting part 23, second contact block mounting hole 231, second hollow part 24, connecting base 3, support protrusion 31, heat-deformable part 405, moving piece 4, fixed end 41, positioning mounting hole 411, first clearance hole 412, swing end 42, second clearance hole 421, first contact block mounting hole 422, second snap-fit ​​block 423, reinforcing rib 424, temperature plate 5, snap-fit ​​groove 51, moving contact block 6, and fixed contact block 7. Detailed Implementation

[0060] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0062] In one embodiment of the present invention, such as Figure 1-7As shown, a temperature control switch with a safety function includes a first conductive base 1, a second conductive base 2, a connecting base 3, a resettable heat-deformable component 405, a moving contact 6, and a fixed contact 7. The fixed contact 7 is disposed on the second conductive base 2. One end of the heat-deformable component 405 is fixed to the first conductive base 1, and the other end is equipped with a moving contact 6 that is in constant contact with the fixed contact 7. The heat-deformable component 405 generates elastic deformation, driving the moving contact 6 to contact or move away from the fixed contact 7. The first conductive base 1 is connected to the second conductive base 2 through the connecting base 3. When the connecting base 3 is heated above the material's heat resistance temperature, it undergoes plastic deformation and expansion, thereby driving the heat-deformable component 405 to move and move the moving contact 6 away from the fixed contact 7. In this embodiment, when an electrical malfunction causes a temperature rise, the generated heat is transferred to the heat-deformable component 405 of the first conductive base 1. The heat-deformable component 405 reaches a set temperature and deforms due to heat, causing its moving contact 6 to swing upwards. This moves the moving contact 6 away from the fixed contact 7 of the second conductive base 2, thus cutting off the circuit. When the temperature drops to the set temperature, the heat-deformable component 405 returns to its initial state, and the moving contact 6 swings downwards with it. The moving contact 6 then contacts the fixed contact 7, reconnecting the circuit and providing a first-level fuse function for recoverable fault circuits. When an electrical malfunction causes a temperature rise... When the temperature rises above 300°C, the moving contact 6 separates from the fixed contact 7 under the deformation drive of the heat-deformed component 405. The connecting seat 3 is made of plastic. The connecting seat 3 expands and deforms under heat, and the temperature of the connecting seat 3 exceeds the heat resistance temperature of its own material. The heat-deformed component 405 cannot reset. When the temperature rises above 800°C, the temperature control switch is directly burned out and cannot be restored. It remains in an expanded state, and the moving contact 6 and the fixed contact 7 remain separated. The circuit cannot be restored, giving the circuit a secondary safety function. This not only indicates a serious electrical hazard in the circuit, but also reminds the user to check the circuit to prevent direct burnout of electrical appliances or accidents, thus improving the circuit safety performance. Compared with traditional technical solutions where the connecting seat is made of ceramic or other insulating materials, these materials will shrink and return to their original shape after cooling. They cannot achieve the irreversible deformation and melting function of the plastic material in this application, thus failing to effectively protect the circuit. Therefore, using a plastic connecting seat is more advantageous.

[0063] like Figure 1-2As shown, the top of the connecting seat 3 has a supporting boss 31, which abuts against the middle of the heat-deformable member 405. The first conductive seat 1 includes a supporting part 12 built into the supporting boss 31. In this embodiment, when the heat-deformable member 405 deforms, the supporting boss 31 provides a supporting force to ensure that the moving contact 6 driven by the heat-deformable member 405 swings upward and does not fall downward. Furthermore, when the connecting seat 3 melts due to heat deformation, the supporting part 12 inside the supporting boss 31 always supports the supporting boss 31, preventing the melted plastic from falling off. That is, the moving contact 6 is always away from the fixed contact 7, thereby improving the working stability of the supporting boss 31.

[0064] like Figure 1-2 As shown, the heat-deformable component 405 includes a movable piece 4 and a temperature plate 5; one end of the movable piece 4 is a fixed end 41; the fixed end 41 is installed on the first conductive base 1; the other end of the movable piece 4 is a swing end 42, which can swing up and down, and the swing end 42 is equipped with the movable contact block 6; one end of the temperature plate 5 is clamped to the first conductive base 1, and the other end of the temperature plate 5 is clamped to the swing end 42; the temperature plate 5 deforms under temperature changes, and the deformation of the temperature plate 5 is used to drive the swing end 42 to swing. In this embodiment, when an electrical malfunction causes a temperature rise, the generated heat is transferred to the temperature plate 5. When the temperature plate 5 reaches the set temperature, its center bends downward, causing the swing end 42 of the moving plate 4 to swing upward. The moving contact 6 follows the swing end 42 upward and separates from the fixed contact 7 on the second conductive base 2, thereby cutting off the circuit. When the temperature drops to the set temperature, the temperature plate 5 returns to its initial state, and the moving contact 6 follows the swing end 42 downward. The moving contact 6 then contacts the fixed contact 7, and the circuit is reconnected.

[0065] like Figure 2-7As shown, the first conductive base 1 further includes a fixing part 14; the fixing part 14 includes a fixing platform 141 and a riveting protrusion 142, the riveting protrusion 142 protruding from the top surface of the fixing platform 141; the fixing end 41 has a positioning mounting hole 411; the mounting hole 411 is fitted onto the riveting protrusion 142 and the fixing part 14 and the fixing end 41 are fixedly connected by riveting. The first conductive base 1 also includes a first body 11 and a first connecting part 13; the first conductive base 1 has a first hollow part 15 extending through it; the fixing part 14 is located above the first hollow part 15, the fixing part 14 is connected to the first body 11 through the first connecting part 13, and the fixing part 14 is used to fix the fixing end 41; the first connecting part 13 is inclined; the first body 11, the supporting part 12, the first connecting part 13, the fixing part 14 and the first hollow part 15 are integrally formed structures. The support portion 12 protrudes from one side of the first body 11, and the support portion 12 faces the second conductive base 2. The fixed end 41 is horizontally arranged, and the bottom surface of the fixed end 41 is in contact with the top surface of the fixed platform 141. The fixed end 41 is provided with a positioning mounting hole 411 and a first clearance hole 412. The positioning mounting hole 411 is used to install the fixed end 41 into the mounting groove 1421. The first clearance hole 412 is used to allow the first locking block 143 to pass through the fixed end 41. The swing end 42 is inclined. The swing end 42 is provided with a second clearance hole 421 and a first contact block mounting hole 422. The second clearance groove is used to allow the support portion 12 to pass through the swing end 42. The first contact block mounting hole 422 is used to install the moving contact block 6. The top surface of the swing end 42 has a protruding second locking block 423, which is used to lock the temperature plate 5. The fixing part 14 further includes a first locking block 143, which is disposed on the side of the fixing platform 141 near the support part 12, and the bending part of the first locking block 143 is provided with rounded corners. The first locking block 143 is used to lock the resettable heat-deformable part 405.In this embodiment, the first body 11, the support portion 12, the first connecting portion 13, the fixing portion 14, and the first hollow portion 15 are integrally formed, which helps to improve the structural stability of the first conductive base 1. The first body 11 has the first hollow portion 15 through it, which can reduce the weight of the first body 11 and make the temperature control switch lighter overall. The first connecting portion 13 is inclined to avoid excessive bending and breakage at the connection point, thereby improving the forming quality of the first conductive base 1. The top of the support portion 12 is built into the interior of the expansion boss 13. When the temperature of the connecting base 3 is higher than 300°C, the connecting base 3 expands due to heat. Because the top of the support portion 12 is placed inside the support boss 31, the support boss 31 expands upward, thereby ensuring that the expansion of the support boss 31 can support the temperature plate 5. Figure 4 As shown, when the connecting seat 3 is heated and expands, the main body of the support part 12 divides the connecting seat 3 into left and right parts. The left part of the connecting seat 3 is supported by the main body of the support part 12, ensuring that the plastic on the left side of the connecting seat 3 will not sink when heated, but will only expand upward, thereby improving the expansion quality of the connecting seat 3. In this embodiment, when installing the fixed end 41 of the moving piece 4, the fixed end 41 passes through the riveting protrusion 142 and the first clamping block 143, and is installed in the mounting groove 1421 of the riveting protrusion 142. The mounting groove 1421 is formed after being flanged and flattened by a mold during riveting. The height of the mounting groove 1421 is the thickness of the moving piece 4. The bottom surface of the fixed end 41 is attached to the top surface of the fixed platform 141. The fixed platform 141 is an elongated elliptical protrusion that acts as a rivet, making the fixed end 41 firmly installed and not easy to fall off. The bending part of the first clamping block 143 is provided with a rounded corner 1431, which is not easy to bend and break when the first clamping block 143 is formed, thereby improving the structural stability of the fixed part 14.

[0066] like Figure 2 and Figure 5As shown, the second conductive base 2 includes a second body 21, a second connecting portion 22, and a mounting portion 23. The second body 21 has a second hollow portion 24 extending through it. The mounting portion 23 is located above the second hollow portion 24 and is connected to the second body 21 via the second connecting portion 22. The mounting portion 23 has a second contact mounting hole 231 for mounting the fixed contact 7. The second connecting portion 22 is inclined. The second body 21, the second connecting portion 22, the mounting portion 23, and the second hollow portion 24 are integrally formed. In this embodiment, the integrally formed structure of the second body 21, the second connecting portion 22, the mounting portion 23, and the second hollow portion 24 is beneficial to improving the structural stability of the second conductive base 2. The second body 21 having the second hollow portion 24 extending through it reduces the weight of the second body 21, making the temperature control switch lighter overall. The inclined arrangement of the second connecting portion 22 avoids excessive bending and breakage at the connection point, thus improving the forming quality of the second conductive base 2.

[0067] like Figure 2 and Figure 7 As shown, the length of the temperature plate 5 is greater than the mounting distance of the temperature plate 5. In this embodiment, the temperature plate 5 is flat at room temperature. When the temperature plate 5 is mounted on the first conductive base 1 and the swing end 42, the length of the temperature plate 5 is greater than the length of the mounting area, and the temperature plate 5 is in a curved state. Specifically, the structure is such that the center of the temperature plate 5 is concave upward or concave downward. The support boss 31 ensures that the swing end 42 of the moving plate 4 remains in a downward swinging state, ensuring that the moving contact 6 and the fixed contact 7 always remain in contact during normal operation, thereby improving the energizing stability of the temperature control switch.

[0068] like Figure 6 As shown, reinforcing ribs 424 are provided on both sides of the second clearance hole 421, and the reinforcing ribs 424 protrude from the top surface of the swing end 42; the temperature plate 5 has a locking groove 51 at both ends, the locking groove 51 is locked to the first locking block 143, and the other locking groove 51 is locked to the second locking block 423. In this embodiment, the reinforcing ribs 424 are provided on both sides of the second clearance hole 421, which helps to enhance the structural stability of the swing end 42 and prevent the swing end 42 from deforming during the stamping of the second clearance hole 421. In this embodiment, the first locking block 143 and the second locking block 423 have an L-shaped structure. After the two locking grooves 51 of the temperature plate 5 are respectively locked to the first locking block 143 and the second locking block 423, the temperature plate 5 is not easy to fall off and is firmly installed.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A temperature control switch with a safety function, characterized by: It includes a first conductive base, a second conductive base, a connecting base, a resettable heat-deformable component, a moving contact, and a fixed contact; The fixed contact block is disposed on the second conductive base; One end of the heat-deformable component is fixed on the first conductive base, and the other end is equipped with a movable contact block that is in constant contact with the fixed contact block. The heat-deformable component generates elastic deformation to drive the movable contact block to contact or move away from the fixed contact block. The first conductive base is connected to the second conductive base through the connecting base. When the connecting base is heated above the heat resistance temperature of the material, it will undergo plastic deformation and expansion, thereby driving the heated deformed part to move and move the moving contact away from the fixed contact. The connecting base is made of plastic that deforms and melts irreversibly. The top of the connector has a supporting boss that abuts against the middle of the heat-deformed part. The first conductive seat includes a support portion built into the supporting boss.

2. The temperature control switch with safety function according to claim 1, characterized in that: The heat-deformable component includes a moving plate and a temperature plate; One end of the moving piece is a fixed end; the fixed end is mounted on the first conductive base; The other end of the moving piece is a swing end, which can swing up and down, and the swing end is equipped with the moving contact block; One end of the temperature plate is fitted into the first conductive base, and the other end of the temperature plate is fitted into the swing end; The temperature plate deforms in response to temperature changes, and the deformation of the temperature plate drives the swing end to swing.

3. The temperature control switch with safety function according to claim 2, characterized in that: The first conductive base further includes a fixing part; the fixing part includes a fixing platform and a riveting protrusion, the riveting protrusion protruding from the top surface of the fixing platform; The fixed end is provided with a positioning and mounting hole; The mounting hole is fitted onto the riveting protrusion and the fixing part and the fixing end are fixedly connected by riveting.

4. The temperature control switch with safety function according to claim 3, characterized in that: The first conductive base also includes a first body and a first connecting portion; The first conductive base has a first hollow portion through it; The fixing part is located above the first hollow part. The fixing part is connected to the first body through the first connecting part. The fixing part is used to fix the fixing end; The first connecting part is inclined; The first body, the supporting part, the first connecting part, the fixing part, and the first hollow part are integrally formed structures; The support portion protrudes from one side of the first body and faces the second conductive base.

5. The temperature control switch with safety function according to claim 3, characterized in that: The fixed end is horizontally positioned, and the bottom surface of the fixed end is in contact with the top surface of the fixed platform; The fixed end is provided with a positioning mounting hole and a first clearance hole; The positioning mounting hole is used to install the fixed end into the mounting groove; The first clearance hole is used to allow the first mounting block to pass through the fixed end; The swing end is set at an angle; The swing end is provided with a second clearance hole and a first contact block mounting hole; The second clearance groove is used to allow the support portion to pass through the swing end; The first contact mounting hole is used to mount the moving contact; The top surface of the swing end has a second mounting block protruding from it, which is used to mount the temperature plate.

6. A temperature control switch with a safety function according to claim 3, characterized in that: The fixing part also includes a first locking block. The first mounting block is located on the side of the fixing platform near the support portion, and the bent portion of the first mounting block has rounded corners. The first mounting block is used to mount the repositionable heat-deformable component.

7. A temperature control switch with a safety function according to claim 1, characterized in that: The second conductive base includes a second body, a second connecting portion, and a mounting portion; The second body has a second hollow section running through it; The mounting part is located above the second hollowed-out part. The mounting part is connected to the second body via the second connecting part; The mounting part is provided with a second contact block mounting hole. The second contact mounting hole is used to mount the fixed contact block; The second connecting part is inclined; The second body, the second connecting part, the mounting part and the second hollow part are integrally formed.

8. A temperature control switch with a safety function according to claim 2, characterized in that: The length of the temperature plate is greater than the mounting distance of the temperature plate.

9. A temperature control switch with a safety function according to claim 5, characterized in that: The second clearance hole is provided with reinforcing ribs on both sides, and the reinforcing ribs protrude from the top surface of the swing end; The temperature plate has mounting slots at both ends. The mounting slot is mounted on the first mounting block, and the other mounting slot is mounted on the second mounting block.

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