Small overheating protection element

Abstract

The utility model discloses a small overheating protection element comprising an insulation pedestal, and two sides of the insulation pedestal are respectively provided with a metal terminal; the insulating base is provided with a movable contact spring connected with one metal terminal and a static contact connected with the other metal terminal, the movable contact spring is provided with a temperature sensing sheet, and the temperature sensing sheet can deform through the change of heat, so that the movable contact spring is bent and deformed to be separated from the static contact. The contact is characterized in that the insulating base is provided with a contact surface which is lower than the upper surface of the insulating base, the static contact is located on the contact surface, the movable contact spring is located on the upper surface, and one end of the movable contact spring can be in contact with the static contact. In this way, the height of the static contact is reduced, when the movable contact spring makes contact with the static contact, the bending degree of the movable contact spring can be greatly reduced, the length of the movable contact spring can be shortened, it can be guaranteed that the movable contact spring can be driven by the temperature sensing piece to tilt up to be separated from the static contact under the length, and miniaturization is achieved.

Description

Technical Field

[0001] The utility model relates to an overheat protection element, in particular to a miniaturized overheat protection element. Background Art

[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 heating 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 (such as patent number: CN201921852003, patent name: a thermal protection device structure).

[0003] However, the above components are relatively large as a whole, and therefore do not have sufficient installation space in some electronic products with narrow internal spaces. To address the above problem, the applicant has designed a miniaturized overheat protection component to solve the problem. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a small overheat protection element.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A small overheat protection element comprises an insulating base, wherein metal terminals are respectively arranged on both sides of the insulating base; the insulating base is provided with a moving spring connected to the metal terminal and a static contact connected to another metal terminal, the moving spring is provided with a temperature sensing piece, and the temperature sensing piece can be deformed by heat changes so that the moving spring is bent and deformed to separate from the static contact, and is characterized in that: a contact surface whose height is lower than the upper surface of the insulating base is provided on the insulating base, the static contact is located on the contact surface, and the moving spring is located on the upper surface and one end of the moving spring can contact with the static contact.

[0007] The end edge of the movable spring piece is located in the insulating base.

[0008] A transition slope is provided between the contact surface and the upper surface.

[0009] The end edge of the movable spring piece is provided with a protruding buckle, and the end edge of the temperature sensing piece is provided with a clamping groove matched with the buckle.

[0010] The buckle is composed of two metal plates which are perpendicular to each other.

[0011] The contact surface and the transition slope are provided with a fulcrum that can contact the temperature sensing sheet, and the movable spring sheet is provided with a through hole to avoid the fulcrum.

[0012] The beneficial effect of the utility model is that the utility model provides a contact surface whose height is lower than the upper surface of the insulating base on the insulating base, and the static contact is located on the contact surface, so that the height of the static contact is reduced. When the movable spring piece contacts the static contact, the bending degree of the movable spring piece can be greatly reduced, thereby shortening the length of the movable spring piece and ensuring that the movable spring piece can be driven by the temperature sensing piece at this length to be tilted and separated from the static contact, thereby achieving miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural view of the utility model;

[0015] Figure 2 It is an exploded view of the utility model;

[0016] Figure 3 is a schematic diagram of the previous structure. DETAILED DESCRIPTION

[0017] The advantages and features of the present disclosure and its implementation methods will be explained by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be comprehensive and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is limited only by the scope of the claims.

[0018] The shapes, sizes, ratios, angles and numbers disclosed in the drawings for describing the embodiments of the present disclosure are only examples, and therefore the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when the detailed description of the relevant known functions or configurations is determined to be unnecessary to blur the focus of the present disclosure, the detailed description will be omitted. In the case of using "including", "having" and "comprising" described in this specification, other parts may be added unless "only" is used. Unless otherwise indicated, the terms in the singular may include plural forms.

[0019] When explaining an element, although not explicitly described, the element is understood to include a range of error.

[0020] When describing a positional relationship, for example, when the positional relationship is described as "on," "above," "below," and "adjacent to," unless "immediately" or "directly" is used, one or more parts may be arranged between two other parts.

[0021] When describing a time relationship, for example, when a time sequence is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases may be included unless “just” or “directly” is used.

[0022] 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 only used 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 the present disclosure.

[0023] As those skilled in the art can fully understand, the features of the different embodiments of the present disclosure can be coupled or combined with each other in part or in whole, and can cooperate with each other in various ways and be driven technically. The embodiments of the present disclosure can be performed independently of each other, or can be performed together in a mutually dependent relationship.

[0024] Reference Figure 1 and Figure 2 The utility model discloses a small overheat protection element, including an insulating base 1, wherein metal terminals 2 are respectively arranged on both sides of the insulating base 1; the insulating base 1 is provided with a moving spring piece 3 connected to the metal terminal 2 and a static contact 4 connected to another metal terminal 2, the moving spring piece 3 is provided with a temperature sensing piece 5, and the temperature sensing piece 5 can be deformed by heat changes so that the moving spring piece 3 is bent and deformed and separated from the static contact 4, the insulating base 1 is provided with a contact surface 6 whose height is lower than the upper surface of the insulating base 1, the static contact 4 is located on the contact surface 6, the moving spring piece 3 is located on the upper surface and one end of the moving spring piece 3 can contact with the static contact 4.

[0025] like Figure 3 As shown, Figure 3The components of the old structure are shown. If the moving spring 3 of the old structure is directly shortened, the position of the static contact 4 is changed to be set on the insulating base 1, and the other structures remain unchanged, the bending degree of the moving spring 3 will be aggravated when the moving spring 3 is in contact with the static contact 4. When the temperature exceeds the critical value and the moving spring 3 and the static contact 4 need to be separated, the temperature sensing piece 5 needs to use a greater elastic force to pull the moving spring 3 to bend and deform so that the end of the moving spring 3 is tilted and separated from the static contact 4 and maintains the same spacing as before, thereby achieving the insurance effect. However, to increase the elastic force of the temperature sensing piece 5, a thicker temperature sensing piece 5 needs to be used, which is not only costly, but also may cause the sensitivity of the temperature sensing piece 5 to decrease. Therefore, the present application adopts a design that reduces the height of the static contact 4. When the dynamic reed 3 contacts the static contact 4, the bending degree of the dynamic reed 3 can be greatly reduced. Therefore, when the length of the dynamic reed 3 is shortened, the thickness of the temperature-sensing piece 5 does not need to be increased. It can be ensured that the dynamic reed 3 can be driven by the temperature-sensing piece 5 and the end is tilted and separated from the static contact 4 to maintain the same spacing as before, thereby achieving miniaturization.

[0026] As shown in the figure, the end edge of the movable spring piece 3 is located inside the insulating base 1, which not only shortens the length of the movable spring piece 3 and realizes miniaturization, but also reduces the risk of the end of the movable spring piece 3 being hooked during assembly.

[0027] As shown in the figure, a transition slope 7 is provided between the contact surface 6 and the upper surface. The transition slope 7 avoids stress concentration between the contact surface 6 and the upper surface, thereby improving the structural reliability of the insulating base 1.

[0028] As shown in the figure, the end edge of the movable spring piece 3 is provided with a raised buckle 8, and the end edge of the temperature-sensitive piece 5 is provided with a slot that cooperates with the buckle 8. Because the length of the movable spring piece 3 is shortened, the buckle 8 is located at the end edge of the movable spring piece 3, so that the force point of the temperature-sensitive piece 5 on the movable spring piece 3 is located at the end edge of the movable spring piece 3 during bending, and has a large torque, thereby easily driving the movable spring piece 3 to bend. Of course, the buckle 8 is composed of two metal plates perpendicular to each other, and is integrally formed with the movable spring piece 3 by cutting and bending.

[0029] As shown in the figure, a fulcrum 9 capable of contacting the temperature-sensing piece 5 is provided on the contact surface 6 and the transition slope 7, and the movable spring piece 3 is provided with a through hole 10 for avoiding the fulcrum 9. The fulcrum 9 passes through the through hole 10 and contacts the temperature-sensing piece 5, and serves as the fulcrum 9 that drives the movable spring piece 3 to bend after the temperature-sensing piece 5 is deformed. The fulcrum 9 can be made of plastic.

[0030] The above is a detailed introduction to a small overheat protection element provided by an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A small overheat protection element, comprising an insulating base, with metal terminals on both sides of the insulating base; the insulating base is provided with a moving spring connected to the metal terminal and a static contact connected to another metal terminal, the moving spring is provided with a temperature sensing piece, and the temperature sensing piece can be deformed by heat changes so that the moving spring is bent and deformed and separated from the static contact, characterized in that: The insulating base is provided with a contact surface whose height is lower than the upper surface of the insulating base, the static contact is located on the contact surface, and the movable spring is located on the upper surface and one end of the movable spring can contact the static contact.

2. A small overheat protection element according to claim 1, characterized in that: The end edge of the movable spring piece is located in the insulating base.

3. A small overheat protection element according to claim 1, characterized in that: A transition slope is provided between the contact surface and the upper surface.

4. A small overheat protection element according to claim 1, characterized in that: The end edge of the movable spring piece is provided with a protruding buckle, and the end edge of the temperature sensing piece is provided with a clamping groove matched with the buckle.

5. A small overheat protection element according to claim 4, characterized in that: The buckle is composed of two metal plates which are perpendicular to each other.

6. A small overheat protection element according to claim 3, characterized in that: The contact surface and the transition slope are provided with a fulcrum that can contact the temperature sensing sheet, and the movable spring sheet is provided with a through hole to avoid the fulcrum.

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