High-sensitivity miniature temperature controller

Abstract

The utility model discloses a high-sensitivity miniature temperature controller, which comprises an insulating base, a first metal terminal is arranged on one side of the insulating base, and a second metal terminal is arranged on the other side of the insulating base. The insulating base is provided with a movable contact spring connected with the first metal terminal and a static contact connected with the second metal terminal, the movable contact spring is provided with a temperature sensing piece, and the temperature sensing piece can deform through heat change so that the movable contact spring can be bent and deformed to be separated from the static contact. The movable contact spring is provided with an easy-to-bend structure which enables the movable contact spring to bend more easily. According to the utility model, the movable contact spring is provided with the easily-bent structure which enables the movable contact spring to be bent more easily, so that the length of the insulating base and the length of the movable contact spring can be shortened to realize miniaturization, and normal functions and use of the thermal protection device can be ensured.

Description

Technical Field

[0001] This utility model relates to a thermal protection element, and more particularly to a highly sensitive miniature temperature controller. Background Technology

[0002] Thermal protection devices are widely used in temperature control of various industrial equipment, HVAC equipment, and control appliances. The working principle of thermal protection devices is to install the temperature sensing surface of the protector on the heat-generating part of the equipment and connect the two pins of the protector in series in the circuit. When the temperature of the equipment is higher than the set value, the bimetallic strip of the protector will immediately bend and deform, cutting off or connecting the circuit (e.g., patent number: CN201921852003, patent name: a structure of an overheat protection device).

[0003] However, the above-mentioned structure is relatively large and not compatible with many miniaturized household appliances. Therefore, some miniaturized thermal protection devices have appeared on the market. The miniaturization of the above-mentioned thermal protection devices is achieved by shortening the length of the insulating base, moving spring, and temperature sensing plate. However, under the same conditions, the shorter the temperature sensing plate, the weaker the degree of bending caused by its own elastic deformation; and the shorter the moving spring, the greater the force required to bend it to the predetermined angle. Therefore, under the warning temperature, the temperature sensing plate of the above-mentioned structure is difficult to completely bend the moving spring to the predetermined angle, which can easily cause incomplete separation between the moving spring and the stationary contact, and unstable temperature sensing.

[0004] Therefore, the applicant designed a highly sensitive miniature temperature controller to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a highly sensitive miniature temperature controller.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A highly sensitive miniature temperature controller includes an insulating base, with a metal terminal on one side and a metal terminal on the other side; the insulating base has a movable spring connected to the metal terminal and a stationary contact connected to the metal terminal; the movable spring has a temperature sensing plate that can deform due to changes in heat, thereby causing the movable spring to bend and separate from the stationary contact; the movable spring has a bendable structure that makes it easier to bend.

[0008] The bendable structure is a groove provided on the moving spring.

[0009] The groove is U-shaped.

[0010] The groove is positioned opposite to the moving spring.

[0011] The length of the moving spring is less than the length of the temperature sensing plate.

[0012] The movable spring is provided with an "L"-shaped hook, which forms a groove with the movable spring, and the end of the temperature sensing sheet is engaged with the corresponding groove.

[0013] The movable spring is fixed to the metal terminal by riveting, and the riveting point between the movable spring and the metal terminal is located between the two hooks.

[0014] The metal terminal has a raised contact point, and the moving spring has a riveting hole. The contact point is located in the riveting hole and is formed by stamping to form a riveting structure, thereby fixing the metal terminal to the moving spring.

[0015] The second metal terminal includes a connection portion to an insulating base and an exposed pin portion, with the stationary contact soldered to the pin portion.

[0016] The moving spring is provided with a moving contact that can contact the stationary contact.

[0017] The beneficial effects of this utility model are: the movable spring sheet of this utility model is provided with an easy-bend structure that makes the movable spring sheet easier to bend. Therefore, this utility model can shorten the length of the insulating base and the movable spring sheet to achieve miniaturization, while ensuring the normal function and use of the thermal protection device. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is an exploded structural view of the present invention. Detailed Implementation

[0021] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0022] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0023] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0024] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0025] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0026] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0027] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0028] Reference Figure 1 , Figure 2This utility model discloses a highly sensitive miniature temperature controller, including an insulating base 1. The insulating base 1 has a metal terminal 2 on one side and a metal terminal 3 on the other side. The insulating base 1 has a movable spring 4 connected to the metal terminal 2 and a stationary contact 5 connected to the metal terminal 3. The movable spring 4 has a temperature sensing sheet 6, which can deform due to changes in heat, thereby causing the movable spring 4 to bend and completely separate from the stationary contact 5. The movable spring 4 has an easy-bend structure that makes it easier to bend, so even if the movable spring 4 is shortened, it does not require more force to bend it to a predetermined angle.

[0029] As shown in the figure, as a specific structure of this application, the bendable structure is a groove 7 provided on the movable spring 4. The groove 7 is located on the side of the movable spring 4. The design of the groove 7 reduces the rigidity of the movable spring 4 at this location, making the movable spring 4 easier to bend. As a preferred structure, the groove 7 is "U"-shaped, so that the bottom of the groove 7 has an arc transition, avoiding the problem of stress concentration. Moreover, the groove 7 is provided opposite to the movable spring 4, which ensures that there are identical grooves 7 on both sides of the movable spring 4. When bending, the force on both sides is uniform, so the movable spring 4 will not be skewed.

[0030] As shown in the figure, in the preferred structure of this application, the length of the moving spring 4 is less than the length of the temperature sensing sheet 6. However, to ensure the elastic force of the temperature sensing sheet 6, the temperature sensing sheet 6 in this application is not shortened and remains the same size as before. This not only achieves miniaturization but also ensures the normal operation and reliability of the thermal protection device, achieving a balance between miniaturization and reliability. Of course, the above is only a preferred design. We can also shorten the temperature sensing sheet 6 and increase the depth of the groove 7, thereby reducing the rigidity of the moving spring 4 at that location and making it easier to bend. However, if the groove 7 is too deep, it will reduce the current carrying capacity of the moving spring 4 at that location, and the elastic force of the moving spring 4 upon reset will also be small, which may result in the moving spring 4 not being able to reset completely and poor contact with the stationary contact 5.

[0031] As shown in the figure, as a specific structure, the movable spring 4 is provided with an "L"-shaped hook 8, which forms a groove with the movable spring 4. The end of the temperature sensing sheet 6 engages with the corresponding groove, thereby bending and holding the temperature sensing sheet 6. When the temperature rises to a certain temperature, the temperature sensing sheet 6 can deform and drive the movable spring 4 to bend through the groove. As a further structure, the movable spring 4 is fixed to the metal terminal 2 by riveting, and the riveting point between the movable spring 4 and the metal terminal is located between the two hooks 8. Because the length of the temperature sensing sheet 6 is not shortened, we set the riveting point between the two hooks 8, thus achieving a significant shortening of the movable spring 4. As a preferred structure, the metal terminal 2 is provided with a protruding contact point, and the movable spring 4... The device has a riveting hole, and the contact point is located in the riveting hole and is formed by stamping to form a rivet structure 9, thereby fixing the metal terminal 2 to the moving spring 4. The location of the rivet structure 9 is the riveting point. Ordinary rivets occupy a lot of space and are prone to loosening in high temperature environments, resulting in poor contact with the moving spring 4. Therefore, this application adopts a structure in which the metal terminal 2 is directly stamped to fix it to the moving spring 4. The contact point is very small and is a solid metal body integrated with the metal terminal 2. After the contact point is flattened, it is very thin, which not only makes the connection more firm, but also prevents it from contacting the temperature sensing sheet 6 and affecting the deformation of the temperature sensing sheet 6. The above is only a preferred structure for fixing the moving spring 4 to the metal terminal 2. Of course, we can also use welding to fix the moving spring 4 to the metal terminal 2.

[0032] As shown in the figure, the metal terminal 3 includes a connection portion 31 to the insulating base 1 and an exposed pin portion 32. The stationary contact 5 is soldered to the pin portion 32. The moving spring 4 is provided with a moving contact 10 that can contact the stationary contact 5. The moving contact 10 and the stationary contact 5 are generally made of silver. In this application, the stationary contact 5 is directly soldered to the pin portion 32, which increases the accommodating space for the moving contact 10 and the stationary contact 5. Therefore, we can make the moving contact 10 and the stationary contact 5 thicker, so as to withstand a larger overload current, without hindering the miniaturization of the structure.

[0033] The above provides a detailed description of a highly sensitive miniature temperature controller provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high-sensitivity micro temperature controller, comprising an insulating base, one side of the insulating base is provided with a metal terminal one and the other side is provided with a metal terminal two; the insulating base is provided with a moving contact connected with the metal terminal one and a static contact connected with the metal terminal two, the moving contact is provided with a temperature sensing piece, and the temperature sensing piece can be deformed by the change of heat to make the moving contact bend and deform to separate from the static contact, characterized in that: The movable spring sheet is provided with a flexible structure which can make the movable spring sheet more easily bent. ​ 2. The high-sensitivity micro-thermostat according to claim 1, characterized in that: The flexible structure is a groove provided on the movable spring sheet.

3. A high sensitivity micro-thermostat according to claim 2, characterized in that: The groove is "U" shaped.

4. The high sensitivity micro-thermostat according to claim 2, characterized in that: The grooves are oppositely provided on the movable spring sheet.

5. The high sensitivity micro-thermostat according to claim 1, characterized in that: The length of the movable spring sheet is less than that of the temperature sensing sheet.

6. The high sensitivity micro-thermostat according to claim 1, characterized in that: The movable spring sheet is provided with "L" shaped hooks, the hooks and the movable spring sheet form a clamping groove, and the end of the temperature sensing sheet is clamped in the corresponding clamping groove.

7. A high sensitivity micro-thermostat according to claim 6, characterized in that: The movable spring sheet is fixed with the metal terminal one through riveting, and the riveting point of the movable spring sheet and the metal terminal one is located between the two hooks.

8. A high sensitivity micro-thermostat according to claim 7, characterized in that: The metal terminal one is provided with a convex contact point, the movable spring sheet is provided with a riveting hole, the contact point is located in the riveting hole and forms a riveting structure through stamping so as to fix the metal terminal one and the movable spring sheet.

9. The high sensitivity micro-thermostat according to claim 1, characterized in that: The metal terminal two includes a connecting part with the insulating base and an exposed lead part, and the static contact point is welded on the lead part.

10. The high sensitivity micro-thermostat according to claim 9, characterized in that: The movable spring sheet is provided with a movable contact point which can contact the static contact point.

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