Key type overload protection switch

Abstract

The utility model discloses a button type overload protection switch, comprising a main housing; a pressing seat and a base; a reset rod corresponding to the bimetallic strip is arranged at the position, close to the right end, of the bottom of the pressing base. A static contact piece is arranged on the right side of the bimetallic strip. The button type overload protection switch is reasonable in structural design, the reset rod used for recovering the original state of the bimetallic static contact is directly designed on the pressing seat, a push rod is not independently designed any more, a spring enabling the push rod to return is omitted, the reset rod can return directly through the spring below the pressing seat, and the safety of the button type overload protection switch is improved. The overload switch is simpler in structure, more efficient in assembly, more stable in work and more exquisite in appearance.

Description

Technical Field

[0001] This utility model relates to a push-button overload protection switch. Background Technology

[0002] Currently, push-button switches are widely used in home appliances and other electrical fields, and are particularly suitable for extension cords. They utilize the heating and bending of a bimetallic strip to detach from the moving contact to disconnect the circuit. After overload protection, when it is necessary to restore the bimetallic strip to its normal state, either an additional push rod device is designed to flip the bimetallic strip to restore it to its original state, or a push rod device is designed synchronously in the switch pressing assembly to flip the bimetallic strip to restore it to its original state. Both of these solutions require the installation of a spring on the push rod to achieve the push rod return to its original position. The structure is relatively complex, occupies a lot of space, and is complicated to assemble and unstable in operation. Utility Model Content

[0003] This invention overcomes the shortcomings of the existing technology and provides a push-button overload protection switch.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a push-button overload protection switch, comprising:

[0005] main housing;

[0006] A pressing base is located above the main housing. Below the pressing base are an indicator light circuit board and two pressing springs. The main housing is connected to the pressing base via two support legs.

[0007] A base is located below the pressing seat. Inside the base, there is a movable contact piece and a bimetallic piece. Above the movable contact piece, there are a cooperating upper gear and a lower gear. The top of the upper gear contacts the pressing seat.

[0008] The feature is that a reset rod corresponding to the bimetallic strip is provided at the bottom of the pressing seat near the right end; and a stationary contact piece is provided on the right side of the bimetallic strip.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: The push-button overload protection switch of this utility model has a reasonable structural design. The reset rod used to restore the bimetallic static contact to its original state is directly designed on the press base, eliminating the need for a separate push rod. At the same time, the spring for returning the push rod to its original position is eliminated. The spring under the press base is used directly to realize the return of the reset rod, making the overload switch structure more streamlined, the assembly more efficient, the operation more stable, and the appearance more exquisite. Attached Figure Description

[0010] Figure 1 This is an exploded structural diagram of a push-button overload protection switch according to an embodiment of the present utility model;

[0011] Figure 2 This is an assembly diagram of a push-button overload protection switch according to an embodiment of the present invention.

[0012] In the picture:

[0013] 1. Main housing; 2. Press base; 3. Indicator light circuit board; 4. Press spring; 5. Support foot; 6. Base; 7. Moving contact piece; 8. Bimetallic strip; 9. Upper gear; 10. Lower gear; 11. Reset rod; 12. Stationary contact piece. Detailed Implementation

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0015] like Figure 1-2 As shown, a push-button overload protection switch includes:

[0016] Main shell 1;

[0017] The pressing base 2 is located above the main housing 1. Below the pressing base 2, there is an indicator light circuit board 3 and two pressing springs 4. The main housing 1 is connected to the pressing base 2 through two support legs 5.

[0018] The base 6 is located below the pressing seat 2. Inside the base 6, there is a movable contact piece 7 and a bimetallic piece 8. Above the movable contact piece 7, there are a cooperating upper gear 9 and a lower gear 10. The top of the upper gear 9 contacts the pressing seat 2.

[0019] The feature is that: a reset rod 11 corresponding to the bimetallic strip 8 is provided at the bottom of the pressing seat 2 near the right end; and a stationary contact piece 12 is provided on the right side of the bimetallic strip 8.

[0020] The push-button overload protection switch of this utility model has a reasonable structural design. The reset rod used to restore the bimetallic static contact to its original state is directly designed on the press base, eliminating the need for a separate push rod. At the same time, the spring for returning the push rod to its original position is eliminated. The reset rod is returned to its original position directly by the spring under the press base. The overload switch has a more streamlined structure, more efficient assembly, more stable operation, and a more exquisite appearance.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A push-button overload protection switch, comprising: Main shell (1); The pressing base (2) is located above the main housing (1). Below the pressing base (2) is an indicator light circuit board (3) and two pressing springs (4). The main housing (1) is connected to the pressing base (2) via two support legs (5). A base (6) is provided below the pressing seat (2). Inside the base (6) are a movable contact piece (7) and a bimetallic piece (8). Above the movable contact piece (7) are a cooperating upper gear (9) and a lower gear (10). The top of the upper gear (9) contacts the pressing seat (2). The feature is that a reset rod (11) corresponding to the bimetallic strip (8) is provided at the bottom of the pressing seat (2) near the right end; and a stationary contact piece (12) is provided on the right side of the bimetallic strip (8).

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