Bottom plate injection molding type miniature thermal protector

Abstract

The utility model relates to the field of thermal protectors, in particular to a bottom plate injection molding type miniature thermal protector, which comprises a base and a bimetallic strip, one end of the bimetallic strip is provided with a movable contact, the base comprises an injection molding piece and a metal bottom plate, the metal bottom plate is provided with a static contact, and the bimetallic strip is provided with a movable contact. The metal bottom plate is embedded into the injection molding part, and one end of the metal bottom plate extends out of the injection molding part; a groove for accommodating the bimetallic strip is formed in one surface of the injection molding part, and the static contact penetrates out of the injection molding part and is positioned in the groove; the switch further comprises a metal cover plate, the metal cover plate is detachably connected with the injection molding part, the bimetallic strip abuts against the interior of the groove, and the movable contact is made to make contact with the static contact. Compared with the existing thermal protector, the bottom plate injection molding type miniature thermal protector provided by the utility model is simple in structure, so that the installation is more convenient.

Description

A base plate injection molded miniature thermal protector Technical Field

[0001] This utility model relates to the field of thermal protectors, specifically a base plate injection molded miniature thermal protector. Background Technology

[0002] Thermal protectors are commonly used protective components. Among them, miniature thermal protectors are widely used due to their advantages such as small size and fast response speed. Existing small thermal protectors, such as the miniature thermal protector with application number 201721054794.5 and the small thermal protector with application number 201921929497.X, are relatively troublesome to install due to their small size and relatively complex structure. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides a base plate injection molded miniature thermal protector to solve the aforementioned technical problems.

[0004] To achieve the aforementioned objectives, this utility model provides the following technical solution:

[0005] A base-molded miniature thermal protector includes a base and a bimetallic strip with a moving contact at one end. The base includes an injection-molded part and a metal base plate. A stationary contact is provided on the metal base plate, which is embedded in the injection-molded part and extends out of the injection-molded part at one end. A groove for accommodating the bimetallic strip is provided on one side of the injection-molded part, and the stationary contact protrudes from the injection-molded part and is located in the groove. The device also includes a metal cover plate, which is detachably connected to the injection-molded part, pressing the bimetallic strip against the groove and causing the moving contact to contact the stationary contact.

[0006] Preferably, the end of the bimetallic strip furthest from the moving contact is in contact with the metal cover plate.

[0007] Preferably, the metal cover is clipped onto the injection molded part.

[0008] Preferably, the metal cover plate is provided with a protruding piece, and the injection molded part is provided with a recess that mates with the protruding piece.

[0009] Preferably, it also includes an insulating cover, which is fitted onto the base.

[0010] Preferably, a first pin is connected to the metal base plate, and a second pin is connected to the metal cover plate.

[0011] The base plate injection-molded miniature thermal protector provided by this utility model has a simpler structure than existing thermal protectors, and therefore is easier to install. Attached Figure Description

[0012] Figure 1 shows a schematic diagram of the overall structure of the base plate injection-molded miniature thermal protector in the embodiment;

[0013] Figure 2 shows an exploded view of the base plate injection-molded miniature thermal protector in the embodiment;

[0014] Figure 3 shows a schematic diagram of the internal structure of the base plate injection-molded miniature thermal protector in the embodiment;

[0015] Figure 4 shows a schematic diagram of the base structure;

[0016] Figure 5 shows a schematic diagram of the metal cover plate;

[0017] Marked in the attached diagram:

[0018] Base 10, injection molded part 10-1, groove 10-11, metal base plate 10-2, recess 10-3, bimetallic strip 20, stationary contact 30, moving contact 40, metal cover plate 50, protrusion 50-1, first pin 60, second pin 70, insulating cover 80. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please refer to Figures 1-3 for the embodiment. This embodiment of the base-plate injection-molded miniature thermal protector includes a base 10, a bimetallic strip 20 with a moving contact 40 at one end, and a metal cover plate 50. The base includes an injection-molded part 10-1 and a metal base plate 10-2. A stationary contact 30 is provided on the metal base plate, which is embedded within the injection-molded part and extends outwards at one end for connecting pins. One side of the injection-molded part has a groove 10-11 for accommodating the bimetallic strip, and the stationary contact protrudes from the injection-molded part and is located within the groove. The metal cover plate is detachably connected to the injection-molded part, pressing the bimetallic strip against the groove and causing the moving contact to contact the stationary contact. In actual manufacturing, the end of the bimetallic strip furthest from the moving contact is generally placed in contact with the metal cover plate.

[0021] The aforementioned metal cover is preferably snapped onto the injection-molded part. Specifically, as shown in Figures 4 and 5, the metal cover is provided with a protruding piece 50-1, and the injection-molded part is provided with a recess 10-3 that mates with the protruding piece. During installation, the protruding piece is simply snapped onto the recess. To improve stability, the protruding piece can be pressed firmly against the recess, or its own elasticity can be used to clamp it onto the recess. In addition, during manufacturing, it is preferable to provide an insulating cover 80, which is fitted onto the base. This allows the metal cover to be pressed against the injection-molded part. The recess and the protruding piece cooperate to restrict the sliding of the metal cover relative to the injection-molded part, facilitating installation. Of course, during manufacturing, a first pin 60 can be connected to the metal base plate, and a second pin 70 can be connected to the metal cover for ease of use.

[0022] When installing the aforementioned base plate injection-molded miniature thermal protector, firstly, the first pin is welded or otherwise connected to the metal base plate, and the second pin is welded or otherwise connected to the metal cover plate. Then, the bimetallic strip is placed in the groove, and finally the cover plate is snapped onto the injection-molded part and the insulating cover is put on. This structure is relatively simple, the installation is relatively simple, and the size can be made relatively smaller.

[0023] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0024] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0025] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A base-plate injection-molded miniature thermal protector, comprising a base (10) and a bimetallic strip (20) with a movable contact (40) at one end, characterized in that, The base includes an injection molded part (10-1) and a metal base plate (10-2). The metal base plate is provided with a stationary contact (30). The metal base plate is embedded in the injection molded part and one end extends out of the injection molded part. One side of the injection molded part is provided with a groove (10-11) for accommodating the bimetallic strip. The stationary contact protrudes from the injection molded part and is located in the groove. The base also includes a metal cover plate (50). The metal cover plate is detachably connected to the injection molded part, and the bimetallic strip is pressed against the groove, so that the moving contact contacts the stationary contact.

2. The base plate injection molded miniature thermal protector according to claim 1, characterized in that, The end of the bimetallic strip furthest from the moving contact contacts the metal cover plate.

3. The base plate injection molded miniature thermal protector according to claim 1, characterized in that, The metal cover plate is attached to the injection molded part.

4. The base plate injection molded miniature thermal protector according to claim 3, characterized in that, The metal cover plate is provided with a protruding piece (50-1), and the injection molded part is provided with a recess (10-3) that mates with the protruding piece.

5. The base plate injection molded miniature thermal protector according to claim 4, characterized in that, It also includes an insulating cover (80) that is fitted onto the base.

6. The base plate injection molded miniature thermal protector according to any one of claims 1-5, characterized in that, The metal base plate is connected to a first pin (60), and the metal cover plate is connected to a second pin (70).

Images