A temperature controlled switch

Abstract

The utility model discloses a temperature control switch, including insulating seat, first and second electrically conductive seat, moving spring piece and temperature sensing piece. The windproof part is provided with on the one end of insulating seat corresponding static contact block upward, and this windproof part includes side plate and the windproof board connected to its both sides, and the projection of both sides windproof board covers the moving contact block in the front -back direction. This structure can effectively block and dredge strong wind, prevent moving spring piece from the wind pressure and produce the mechanical bending of unexpected, thereby avoided the problem of false opening under the wind environment of hair dryer and the like, greatly improved the reliability and stability of product. Meanwhile, the windproof part can reliably shield the electric arc flash produced in the on-off process, eliminates the user's worry to electric arc, improves the use safety and experience.

Description

Technical Field

[0001] This utility model relates to the field of micro switch technology, and in particular to a temperature control switch. Background Technology

[0002] A temperature control switch (also known as an overheat protector) is a widely used circuit protection component. Its core principle is to utilize the deformation of a bimetallic temperature-sensing element at a specific temperature point, thereby driving the moving and stationary contacts to separate or make contact, thus realizing the disconnection and connection of the circuit. This type of component is widely used in small household appliances such as hair dryers and space heaters, as well as various electric heating devices, playing a crucial role in safety protection.

[0003] In practical applications such as hair dryers, temperature control switches not only need to sense temperature but are also often installed inside or near air ducts, enduring the impact of strong airflow for extended periods. Existing conventional temperature control switches typically have their moving spring and moving contact directly exposed, or only a basic insulating shell. This structure has a significant drawback: when the device is operating, strong airflow (especially from a specific direction) directly acts on the cantilever end of the moving spring, generating wind pressure sufficient to overcome the deformation force of the temperature sensing element. This causes the moving spring to undergo unexpected, temperature-independent mechanical bending, resulting in incorrect separation of the moving and stationary contacts, causing circuit interruption and abnormal device shutdown. This malfunction caused by "wind" rather than "overheating" severely impacts product reliability and user experience. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a temperature control switch.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temperature control switch, comprising a first conductive base, a second conductive base, and an insulating base connected between the two; the insulating base is provided with a movable spring connected to the first conductive base, and the movable spring is provided with a movable contact block; the second conductive base is provided with a stationary contact block corresponding to and in contact with the movable contact block; the movable spring is provided with a temperature sensing sheet, which can deform in response to temperature changes, causing the movable spring to bend so that the movable contact block separates from or contacts the stationary contact block; a windproof portion is provided on one end of the insulating base corresponding to the stationary contact block; the windproof portion includes a side plate provided in the wide side direction of the insulating base, and windproof plates connected to both sides of the side plate and extending along the long side direction of the insulating base; the projections of the windproof plates on both sides in the front-back direction cover the movable contact block.

[0006] As a preferred technical solution of this utility model, the side plate and the windproof plates on both sides are integrally formed to form a U-shaped or U-shaped windproof cover structure.

[0007] As a preferred embodiment of this utility model, the top surface of the windproof plate is higher than the highest position that the movable contact block can reach when the movable spring is in the open state.

[0008] As a preferred embodiment of this utility model, the top surface of the side plate is higher than the highest position that the moving contact block can reach when the moving spring is in the open state.

[0009] As a preferred embodiment of this utility model, the end of the insulating base opposite to the windproof part is also provided with an upwardly protruding anti-pressure column, and the anti-pressure column and the windproof part together constitute a support structure to prevent the temperature sensing element from being compressed.

[0010] As a preferred embodiment of this utility model, one end of the movable spring forms a connecting end fixed to the first conductive base, and the other end forms a swing end that can swing up and down, and the movable contact block is installed on the swing end; one end of the temperature sensing sheet is clamped to the first conductive base, and the other end is clamped to the swing end.

[0011] As a preferred embodiment of this utility model, the movable spring includes a horizontally arranged fixed plate and an inclined swing plate extending from the fixed plate; the first conductive base is provided with a boss, the fixed plate is provided with a mounting hole, the fixed plate is placed horizontally on the insulating base, and is fixed to the boss through the mounting hole.

[0012] As a preferred embodiment of this utility model, the top of the insulating base has a supporting protrusion, the movable spring has a hollow hole, and the supporting protrusion passes upward through the hollow hole and is supported in the middle of the temperature sensing sheet.

[0013] As a preferred embodiment of this utility model, the first conductive base is provided with an upwardly extending first locking plate, and the movable spring is provided with a second locking plate opposite to the first locking plate; the two ends of the temperature sensing sheet are respectively provided with locking slots, and the locking slots are respectively engaged with the inner sides of the first locking plate and the second locking plate.

[0014] As a preferred embodiment of this utility model, the upper ends of the first and second clamping plates are both provided with bent portions that bend toward the temperature sensing sheet, which are used to restrict the temperature sensing sheet from disengaging from the clamping position.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting a windproof section on the insulating base, consisting of side plates and two windproof plates on both sides, and ensuring that the projection of the windproof plates in the front-to-back direction covers the moving contact, this structure can effectively block and divide strong winds from the equipment's air duct, preventing airflow from directly impacting or flowing around to the swing end of the moving spring. This fundamentally eliminates the industry problem of unexpected swinging of the moving spring due to wind pressure, resulting in false disconnection, ensuring the ultra-high reliability and stability of the temperature control switch in strong wind working environments such as hair dryers. Furthermore, the windproof section can reliably shield the arc flashes generated during the switching process, eliminating user concerns about arcs and improving safety and user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the present invention; Figure 3 This is a schematic diagram of the structure of this utility model without the insulating base; Figure 4 This is a schematic diagram of the structure of the insulating base in this utility model.

[0017] Reference numerals: 1. First conductive base; 2. Second conductive base; 3. Insulating base; 4. Moving spring; 5. Moving contact block; 6. Stationary contact block; 7. Temperature sensing element; 8. Windproof part; 9. Side plate; 10. Windproof plate; 11. Anti-pressure column; 12. Fixing plate; 13. Inclined swing plate; 14. Boss; 15. Mounting hole; 16. Supporting protrusion; 17. Hole; 18. First clamping plate; 19. Second clamping plate; 20. Bayonet; 21. Bending part. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1-4The temperature control switch shown includes a first conductive base 1, a second conductive base 2, and an insulating base 3 connected between the two. The insulating base 3 has a movable spring 4 connected to the first conductive base 1, and a movable contact 5 on the movable spring 4. The second conductive base 2 has a stationary contact 6 corresponding to the movable contact 5. The movable spring 4 has a temperature-sensing sheet 7, which deforms in response to temperature changes, causing the movable spring 4 to bend and separate or contact the movable contact 5 with the stationary contact 6. A windproof portion 8 protrudes upward from one end of the insulating base 3 corresponding to the stationary contact 6. The windproof portion 8 includes a side plate 9 located along the wide side of the insulating base 3, and windproof plates 10 connected to both sides of the side plate 9 and extending along the long side of the insulating base 3. The projections of the windproof plates 10 in the front-to-back direction cover the movable contact 5. In this embodiment, in addition to windproofing, the windproof portion 8 also prevents foreign objects from entering in the front airflow direction.

[0021] By providing a windproof section 8 consisting of a side plate 9 and two windproof plates 10 on the insulating base 3, and ensuring that the projection of the windproof plates 10 in the front-to-back direction covers the moving contact 5, this structure can effectively block and divide strong winds from the equipment's air duct, preventing airflow from directly impacting or flowing around to the swing end of the moving spring 4. This fundamentally eliminates the industry problem of unexpected swinging of the moving spring 4 due to wind pressure, resulting in false disconnection, ensuring the ultra-high reliability and stability of the temperature control switch in strong wind operating environments such as blowers. Furthermore, the windproof section 8 can reliably shield the arc flash generated during the switching process, eliminating user concerns about arcs and improving safety and user experience.

[0022] The side plate 9 and the two side wind deflectors 10 are integrally formed, together constituting a U-shaped or U-shaped wind deflector structure. The top surface of the wind deflector 10 is higher than the highest position that the moving contact block 5 can reach when the moving spring 4 is in the open state. The top surface of the side plate 9 is also higher than the highest position that the moving contact block 5 can reach when the moving spring 4 is in the open state. The above structure forms a three-sided protective barrier, providing a more comprehensive wind protection effect. At the same time, by setting the top surfaces of the wind deflector 10 and the side plate 9 to be higher than the highest position of the moving contact block 5 when the moving spring 4 is in the open state, an interference-free space is provided for the normal thermal stroke of the moving spring 4, and a safe protection height exceeding its operating range is constructed, achieving protection and function without interference.

[0023] The insulating base 3 is also provided with an upwardly protruding anti-pressure post 11 at one end opposite the windproof part 8. The anti-pressure post 11 and the windproof part 8 together form a support structure to prevent the temperature sensing element 7 from being compressed. Because this component is easily placed upside down during assembly, that is, the side with the temperature sensing element 7 is pressed against the table. If an object presses on the component, it can easily cause the temperature sensing element 7 to be compressed and bend in the opposite direction, thereby causing the moving spring 4 to bend and deform and separate from the stationary contact, which cannot be restored, resulting in component failure. Therefore, the anti-pressure post 11 and the windproof part 8 cooperate to form an inverted support structure to prevent the temperature sensing element 7 from being compressed to the extreme and failing, and at the same time, it has the effect of preventing hooking and scratching.

[0024] One end of the movable spring 4 forms a connection end fixed to the first conductive base 1, and the other end forms a swing end that can swing up and down. The movable contact block 5 is installed on the swing end. One end of the temperature sensing sheet 7 is clamped to the first conductive base 1, and the other end is clamped to the swing end.

[0025] The movable spring 4 includes a horizontally arranged fixed plate 12 and an inclined swing plate 13 extending from the fixed plate 12; the first conductive base 1 is provided with a boss 14, the fixed plate 12 is provided with a mounting hole 15, the fixed plate 12 is placed horizontally on the insulating base 3, and is fixed to the boss 14 through the mounting hole 15. The top of the insulating base 3 has a supporting protrusion 16, the movable spring 4 is provided with a hollow hole 17, the supporting protrusion 16 passes upward through the hollow hole 17 and is supported in the middle of the temperature sensing plate 7.

[0026] The first conductive base 1 is provided with an upwardly extending first retaining plate 18, and the movable spring 4 is provided with a second retaining plate 19 opposite to the first retaining plate 18; the two ends of the temperature sensing element 7 are respectively provided with retaining slots 20, which are respectively engaged with the inner sides of the first retaining plate 18 and the second retaining plate 19. The retaining structure design of the retaining slots 20 and the retaining plates in this application makes the installation of the temperature sensing element 7 without complicated tools or procedures, simplifying the assembly process and improving production efficiency.

[0027] The upper ends of the first clamping plate 18 and the second clamping plate 19 are both provided with a bent portion 21 that bends toward the side of the temperature sensing sheet 7, which is used to restrict the temperature sensing sheet 7 from disengaging from the clamping position.

[0028] By setting the support protrusion 16 to cooperate with the hollow hole 17 on the moving spring 4, a stable support point is provided in the middle of the temperature sensing plate 7, which can effectively suppress its irregular deformation under high-frequency vibration or impact, and ensure that its deformation force is accurately transmitted to the moving spring 4. At the same time, by using the first and second clamping plates 19 with bending parts 21 to engage with the temperature sensing plate 7, a firm and efficient assembly and positioning of both ends of the temperature sensing plate 7 is achieved, preventing it from loosening due to vibration during long-term use, and ensuring the consistency and sensitivity of the action.

[0029] The temperature control switch described in this application can be widely used in the thermal management and overheat protection of various electrical appliances, and is especially suitable for products including but not limited to: personal care appliances (such as hair dryers, combs, and hand dryers), environmental heating equipment (such as fan heaters and electric heaters), kitchen appliances (such as popcorn machines), household appliances (such as washing machines with drying functions and sterilization appliance drying devices), sanitary ware (such as smart toilets), and various heating brackets, etc.

[0030] In this embodiment, when an electrical malfunction causes the temperature to rise, the generated heat is transferred to the temperature sensing element 7. The temperature sensing element 7 deforms due to heat when it reaches the set temperature value, causing the moving spring 4 to swing upward, thereby moving the moving contact 5 away from the fixed contact of the second conductive base 2, thus cutting off the circuit. When the temperature drops to the set temperature, the temperature sensing element 7 returns to its initial state, and the moving contact 5 swings downward with the moving spring 4, making contact with the stationary contact 6, and the circuit is reconnected. The temperature sensing element 7 in this embodiment is commercially available.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A temperature control switch, comprising a first conductive base (1), a second conductive base (2), and an insulating base (3) connecting the two; the insulating base (3) is provided with a movable spring (4) connected to the first conductive base (1), and the movable spring (4) is provided with a movable contact (5); the second conductive base (2) is provided with a stationary contact (6) corresponding to the movable contact (5); the movable spring (4) is provided with a temperature sensing sheet (7), the temperature sensing sheet (7) is capable of deforming in response to temperature changes, causing the movable spring (4) to bend so that the movable contact (5) separates from or contacts the stationary contact (6); characterized in that: The insulating base (3) has a windproof part (8) protruding upward at one end corresponding to the stationary contact block (6); the windproof part (8) includes a side plate (9) provided in the wide side direction of the insulating base (3) and a windproof plate (10) connected to both sides of the side plate (9) and extending along the long side direction of the insulating base (3); the projections of the windproof plates (10) on both sides in the front and rear directions cover the moving contact block (5).

2. The temperature control switch according to claim 1, characterized in that: The side panel (9) and the windproof panels (10) on both sides are integrally formed to form a U-shaped or U-shaped windproof cover structure.

3. The temperature control switch according to claim 1 or 2, characterized in that: The top surface of the windproof plate (10) is higher than the highest position that the moving contact block (5) can reach when the moving spring (4) is in the open state.

4. The temperature control switch according to claim 1 or 2, characterized in that: The top surface of the side plate (9) is higher than the highest position that the moving contact block (5) can reach when the moving spring (4) is in the open state.

5. The temperature control switch according to claim 1, characterized in that: The insulating base (3) is provided with an upwardly protruding anti-pressure column (11) at one end opposite to the windproof part (8). The anti-pressure column (11) and the windproof part (8) together form a support structure to prevent the temperature sensing sheet (7) from being compressed.

6. The temperature control switch according to claim 1, characterized in that: One end of the movable spring (4) forms a connection end fixed to the first conductive base (1), and the other end forms a swing end that can swing up and down. The movable contact block (5) is installed on the swing end. One end of the temperature sensing sheet (7) is clamped to the first conductive base (1), and the other end is clamped to the swing end.

7. The temperature control switch according to claim 6, characterized in that: The moving spring (4) includes a horizontally arranged fixed plate (12) and an inclined swing plate (13) extending from the fixed plate (12); the first conductive seat (1) is provided with a boss (14), the fixed plate (12) is provided with a mounting hole (15), the fixed plate (12) is placed horizontally on the insulating seat (3), and is fixed to the boss (14) through the mounting hole (15).

8. The temperature control switch according to claim 1, 6, or 7, characterized in that: The top of the insulating base (3) has a supporting protrusion (16), the moving spring (4) has a hollow hole (17), the supporting protrusion (16) passes upward through the hollow hole (17) and is supported in the middle of the temperature sensing sheet (7).

9. The temperature control switch according to claim 6 or 7, characterized in that: The first conductive base (1) is provided with an upwardly extending first locking plate (18), and the moving spring (4) is provided with a second locking plate (19) opposite to the first locking plate (18); the two ends of the temperature sensing sheet (7) are respectively provided with locking slots (20), and the locking slots (20) are respectively engaged with the inner sides of the first locking plate (18) and the second locking plate (19).

10. The temperature control switch according to claim 9, characterized in that: The upper ends of the first card plate (18) and the second card plate (19) are provided with a bent portion (21) that bends toward the side of the temperature sensing sheet (7) to restrict the temperature sensing sheet (7) from disengaging from the snap-fit ​​position.

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