An automatic reset overload protector

Abstract

The utility model discloses an automatic reset overload protector, aims at providing an automatic reset overload protector convenient to assemble, it includes the casing, metal spring piece, detachable connection in the casing, and fixed with the movable contact, input foot, and one part is located in the casing and is fixedly connected with the metal spring piece, and another part is located in the casing after penetrating the casing, metal carrier sheet is fixedly connected with the casing, and one end is located in the casing and is fixed with the static contact corresponding with movable contact, and another end is located in the casing after penetrating the casing and is integrally formed with the socket hardware spare. The utility model has the beneficial effects that when the circuit is overloaded or short-circuited, the temperature rises, and the circuit is automatically disconnected, and after cooling, the metal spring piece resets automatically, and the use safety performance of user is improved, the overload protector is integrated with the socket hardware spare, and the purpose of convenient assembly is achieved, and the structural layout of each component is beneficial to reducing the volume.

Description

Technical Field

[0001] This utility model relates to the technical field of overload protectors, and in particular to an automatic reset overload protector. Background Technology

[0002] Overload protectors are widely used circuit protection devices that can disconnect the circuit in time when an overload or short circuit occurs, making control convenient and improving user safety.

[0003] Chinese Patent No. CN214672268U, authorized on November 9, 2021, discloses a utility model patent entitled "An Overload Protection Device with Indicator Light". It includes a protective shell, pin 1, pin 2, and pin 3. The protective shell contains a metal spring and a circuit board. The metal spring has a moving contact, and one end of the metal spring has a button base. The button base is vertically connected to the side wall of the protective shell. The bottom side of the button base has a slot 1 that matches the metal spring. A button body is fixed to the top of the button base, penetrating the top of the protective shell and located outside the shell. The other end of the metal spring is fixedly connected to one end of pin 1. One end of pin 1, one end of pin 2, and one end of pin 3 are detachably installed inside the protective shell. The end of pin 2 inside the protective shell has a stationary contact corresponding to the moving contact. Pins 1, 2, and 3 are all electrically connected to the circuit board, which has an indicator light. The other ends of pins 1, 2, and 3 all penetrate the protective shell and are located at the bottom of the protective shell.

[0004] As can be seen from the above patents, in the prior art, the overload protector and the socket are basically separate units. When the socket needs to have an overload protection function, it is often necessary to assemble the overload protector onto the socket, which is cumbersome. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the cumbersome assembly operation of overload protectors and sockets in the prior art, and provides an automatic reset overload protector that is easy to assemble.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic reset overload protector, comprising:

[0008] case;

[0009] A metal spring is detachably connected to the housing and has a fixed moving contact.

[0010] The input pin has one part located inside the housing and fixedly connected to a metal spring, and the other part passing through the housing and located outside the housing;

[0011] A metal carrier plate is fixedly connected to the housing. One end of the carrier plate is located inside the housing and has a fixed stationary contact corresponding to the moving contact. The other end of the carrier plate passes through the housing and is located outside the housing, integrally formed with the socket hardware. When the circuit is connected, the moving contact and the stationary contact are in contact. After the current enters from the input pin, it flows into the appliance plug through the metal spring, the metal carrier plate, and the socket hardware in sequence. If an overload occurs, the metal spring heats up and deforms, causing the moving contact on the metal spring to automatically spring open and separate from the stationary contact, thus disconnecting the current and protecting the appliance from damage. After cooling down, the metal spring automatically resets, improving user safety. This solution integrates the overload protector and the socket hardware into one unit, achieving the purpose of easy assembly.

[0012] Preferably, the metal carrier is L-shaped, with one side fixed inside the housing and located on one side of the metal spring. The stationary contact is fixed to one side of the metal carrier, and the other side of the metal carrier is located outside the housing and is fixedly connected to the socket hardware, forming an integral unit. The socket hardware is located on the opposite side of the metal spring. This structural layout of the components helps to reduce the volume.

[0013] Preferably, the portion of the input pin extending through the housing and located outside the housing is perpendicular to its portion inside the housing. This portion is L-shaped, with one side extending through the housing's outer wall and the other side conforming to the housing's side wall and extending to the housing's side surface. The input pin is located between the socket hardware and the housing. This structural design of the input pin helps ensure the stability of the connection structure, while its layout helps reduce volume.

[0014] Preferably, the metal spring includes a substrate, and the substrate has three side plates: side plate one, side plate two, and side plate three. Side plates one, two, and three are all located on the same side of the substrate, forming an E-shaped structure, and are all fixedly connected to the substrate as a single unit. Side plate two is located between side plates one and three, and the moving contact is located on side plate two. The length of side plate two is less than the lengths of side plates one and three, respectively. One end of side plate one and one end of side plate three are fixedly connected to the substrate, and the other ends of side plate one and side plate three are fixed to the two ends of the portion of the input pin located inside the housing. Current is input from the input pin and conducts through side plates one and three, respectively, to side plate two. The moving contact on side plate two separates from or contacts the stationary contact on the metal carrier, enabling the socket hardware to switch on and off in case of circuit overload or short circuit, thus improving safety performance.

[0015] Preferably, the distance between one end of side plate one and one end of side plate three is greater than the distance between the other ends of side plate one and side plate three. This design allows the other ends of side plate one and side plate three to be close together, which is beneficial in the event of circuit overload or short circuit, where high temperature causes deformation of the metal spring, enabling side plate two to separate the moving contact from the stationary contact. The working principle is simple, and the response is fast and sensitive; after cooling, the metal spring automatically resets.

[0016] The beneficial effects of this utility model are: when the circuit is overloaded or short-circuited, the circuit will automatically disconnect when the temperature rises, and the metal spring will automatically reset after cooling, thus improving the user's safety performance; the overload protector and the socket hardware are integrated into one piece, which facilitates assembly; the structural layout of each component helps to reduce the size. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is the front view of this utility model;

[0019] Figure 3 yes Figure 2 Sectional view of AA;

[0020] Figure 4 This is a structural schematic diagram of the metal part of this utility model.

[0021] In the diagram: 1. Housing, 2. Metal spring, 3. Moving contact, 4. Input pin, 5. Metal carrier, 6. Stationary contact, 7. Socket hardware, 8. Base plate, 9. Side plate one, 10. Side plate two, 11. Side plate three. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4In the described embodiment, an automatic reset overload protector includes a housing 1; a metal spring 2 detachably connected to the housing 1 and fixed with a moving contact 3; an input pin 4, one part of which is located inside the housing 1 and fixedly connected to the metal spring 2, and the other part of which passes through the housing 1 and is located outside the housing 1; a metal carrier 5 fixedly connected to the housing 1, one end of which is located inside the housing 1 and fixed with a stationary contact 6 corresponding to the moving contact 3, and the other end of which passes through the housing 1 and is located outside the housing 1 and integrally formed with a socket hardware 7.

[0027] The metal carrier 5 is L-shaped. One side of the metal carrier 5 is fixed inside the housing 1 and located on one side of the metal spring 2. The stationary contact 6 is fixed on one side of the metal carrier 5. The other side of the metal carrier 5 is located outside the housing 1 and is fixedly connected to the socket hardware 7 and forms an integral part. The socket hardware 7 is located on the other side corresponding to the metal spring 2.

[0028] The portion of the input pin 4 that passes through the housing 1 and is located outside the housing 1 is perpendicular to the portion located inside the housing 1. The portion of the input pin 4 that passes through the housing 1 and is located outside the housing 1 is L-shaped. One side of the portion of the input pin 4 that passes through the housing 1 and is located outside the housing 1 extends through the side wall of the housing 1. The other side of the portion of the input pin 4 that passes through the housing 1 and is located outside the housing 1 is attached to the side wall of the housing 1 and extends to the side of the housing 1. The input pin 4 is located between the socket hardware 7 and the housing 1.

[0029] like Figure 4 As shown, the metal spring 2 includes a base plate 8. The base plate 8 has three side plates: a first side plate 9, a second side plate 10, and a third side plate 11. These three side plates are all located on the same side of the base plate 8, forming an E-shaped structure, and are all fixedly connected to the base plate 8 as a single unit. The second side plate 10 is located between the first side plate 9 and the third side plate 11. The moving contact 3 is located on the second side plate 10. The length of the second side plate 10 is less than the lengths of the first side plate 9 and the third side plate 11. One end of the first side plate 9 and one end of the third side plate 11 are fixedly connected to the base plate 8. The other ends of the first side plate 9 and the third side plate 11 are fixed to the two ends of the portion of the input pin 4 located inside the housing 1. The distance between one end of the first side plate 9 and one end of the third side plate 11 is greater than the distance between the other ends of the first side plate 9 and the third side plate 11.

[0030] When the circuit is connected, the moving contact 3 is in contact with the stationary contact 6. After the current enters from the input pin 4, it flows into the appliance plug through the metal spring 2, the metal carrier 5, and the socket hardware 7 in sequence. If an overload occurs, the metal spring 2 will deform due to the increased temperature, causing the moving contact 3 on the metal spring 2 to automatically spring open and separate from the stationary contact 6, thus disconnecting the current and protecting the appliance from damage. After cooling down, the metal spring 2 will automatically reset, improving the user's safety. This solution integrates the overload protector with the socket hardware 7 into one unit, which is convenient for assembly and easy to operate.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic reset overload protector, characterized in that, include: Shell (1); Metal spring (2) is detachably connected to the housing (1) and has a fixed moving contact (3). The input foot (4) has a part located inside the housing (1) and fixedly connected to the metal spring (2), and the other part passes through the housing (1) and is located outside the housing (1); The metal carrier (5) is fixedly connected to the housing (1). One end of the carrier is located inside the housing (1) and is fixed with a stationary contact (6) corresponding to the moving contact (3). The other end of the carrier passes through the housing (1) and is located outside the housing (1) and is integrally formed with a socket hardware (7).

2. The automatic reset overload protector according to claim 1, characterized in that, The metal carrier (5) is L-shaped. One side of the metal carrier (5) is fixed inside the housing (1) and located on one side of the metal spring (2). The stationary contact (6) is fixed on one side of the metal carrier (5). The other side of the metal carrier (5) is located outside the housing (1) and is fixedly connected to the socket hardware (7) and forms an integral part. The socket hardware (7) is located on the other side corresponding to the metal spring (2).

3. An automatic reset overload protector according to claim 2, characterized in that, The portion of the input pin (4) that passes through the housing (1) and is located outside the housing (1) is perpendicular to the portion located inside the housing (1). The portion of the input pin (4) that passes through the housing (1) and is located outside the housing (1) is L-shaped. One side of the portion of the input pin (4) that passes through the housing (1) and is located outside the housing (1) passes through the side wall of the housing (1). The other side of the portion of the input pin (4) that passes through the housing (1) and is located outside the housing (1) is attached to the side wall of the housing (1) and extends to the side of the housing (1). The input pin (4) is located between the socket hardware (7) and the housing (1).

4. An automatic reset overload protector according to claim 1, 2, or 3, characterized in that, The metal spring (2) includes a substrate (8). The substrate (8) has a side plate 1 (9), a side plate 2 (10) and a side plate 3 (11) on its side. The side plate 1 (9), side plate 2 (10) and side plate 3 (11) are all located on the same side of the substrate (8) to form an E-shaped structure and are all fixedly connected to the substrate (8) to form an integral part. The side plate 2 (10) is located between the side plate 1 (9) and the side plate 3 (11). The moving contact (3) is located on the side plate 2 (10). The length of the side plate 2 (10) is less than the length of the side plate 1 (9) and the length of the side plate 3 (11). One end of the side plate 1 (9) and one end of the side plate 3 (11) are fixedly connected to the substrate (8). The other end of the side plate 1 (9) and the other end of the side plate 3 (11) are fixed to the two ends of the part of the input foot (4) located inside the housing (1).

5. An automatic reset overload protector according to claim 4, characterized in that, The distance between one end of side piece one (9) and one end of side piece three (11) is greater than the distance between the other end of side piece one (9) and the other end of side piece three (11).

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