An integrated overload protection switch

Abstract

The utility model provides a kind of integrated overload protection switch, it includes: base;Power-on mechanism, it includes button and power-on terminal, button and power-on terminal between being equipped with ratchet and power-on spring;Overload protection mechanism, it includes the metal sheet that can be deformed when heated and reciprocating support, support is connected with base by support spring and located below metal sheet;Metal sheet bottom end is connected with base, and protection terminal is equipped on metal sheet and can be contacted or separated with power-on terminal.The utility model has realized switch and overload protector two-in-one function, easy to operate, can quickly realize power-off protection and restore power-on.

Description

Technical Field

[0001] This utility model relates to an integrated overload protection switch. Background Technology

[0002] Push-button switches are widely used in daily life to control the on / off state of circuits. During actual use, situations often arise where the current is too high, which can damage the switch or even cause safety accidents. Therefore, how to handle excessive current without affecting the normal operation of the switch has become a problem that needs to be solved.

[0003] Chinese Patent 202120182260.0 discloses a button overload protection switch, including: a pressing housing, an indicator light circuit assembly, and an overload protection button switch; the indicator light circuit assembly includes: a PCB indicator light circuit and a reset conductive spring; the PCB indicator light circuit is fixed inside the pressing housing, and a first power connector and a second power connector are provided on the PCB indicator light circuit; the reset conductive spring is disposed between the PCB indicator light circuit and the overload protection button switch, and the first end of the reset conductive spring abuts against the first power connector, and the second end of the reset conductive spring abuts against the overload protection button switch; the reset conductive spring is provided with a conductive extension, which is embedded in the housing of the overload protection button switch and abuts against its conductive contact.

[0004] Chinese Patent 202320863978.5 discloses an overload protection switch and an electrical appliance, which includes a housing, a button mechanism, a moving contact, a stationary contact, and a mating component. The button mechanism is movably disposed in the housing and can be pressed or reset relative to the housing. Both the moving and stationary contacts are disposed in the housing. The stationary contact includes a bimetallic element disposed in the housing and a stationary contact point disposed on the bimetallic element. The moving contact can contact or separate from the stationary contact point. The bimetallic element can bend away from the moving contact in a protective state under overload conditions. The mating component connects to the button mechanism and can act on the moving contact and the bimetallic element. When the bimetallic element bends in a protective state under overload conditions, the stationary contact point separates from the moving contact. When the button mechanism resets when the bimetallic element is in a protected state, the button mechanism can drive the mating component to reset the bimetallic element in the protected state.

[0005] Chinese Patent 202310523471.X discloses a push-button overload switch, including a housing and a stationary terminal and a moving terminal disposed on the housing. The stationary terminal and the moving terminal are in contact with each other through a bimetallic strip. The connection or disconnection of the stationary terminal and the moving terminal is achieved by the deformation of the bimetallic strip. The stationary terminal and the moving terminal are in contact with each other through two contact points. The connection or disconnection of the stationary terminal and the moving terminal is achieved by the deformation of the bimetallic strip body. A stationary terminal is fixed on the edge of the bimetallic strip body, and a contact point is disposed in the middle of the bimetallic strip body.

[0006] The drawbacks of the above technical solution are: the structure is relatively complex, the assembly is cumbersome, the operation is inconvenient, and it cannot achieve rapid power-off and recovery when the current is too high.

[0007] Therefore, how to provide an overload protection switch that can be automated and easy to operate has become a problem that the industry needs to solve. Utility Model Content

[0008] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an integrated overload protection switch that combines the functions of a switch and an overload protector; it is easy to operate, can quickly cut off power and restore power; and it can be assembled efficiently, improving production efficiency and reducing costs.

[0009] To achieve the above objectives, this utility model provides an integrated overload protection switch, which includes:

[0010] Base;

[0011] The energizing mechanism includes a button and an energizing terminal, with a ratchet and an energizing spring provided between the button and the energizing terminal.

[0012] The overload protection mechanism includes a metal sheet that deforms when heated and a reciprocating support component. The support component is connected to the base via a support spring and is located below the metal sheet. The bottom end of the metal sheet is connected to the base, and the metal sheet is provided with protective terminals that can contact or separate from the energized terminals.

[0013] In this design, the protection terminal is located at the top of the metal plate; the contact or separation of the energized terminal and the protection terminal is achieved by pressing down the button.

[0014] When the protection terminal contacts the energized terminal, the circuit is connected; when the current is too large, the metal sheet will heat up and deform, causing the protection terminal to lose contact with the energized terminal, thereby disconnecting the circuit and ensuring safety.

[0015] When a metal sheet is deformed, it cools down quickly because the circuit is broken and no current flows through it, but it cannot restore its shape on its own.

[0016] The base has conductive areas for placing various components.

[0017] In this invention, the energized spring is connected to the base via a movable connecting plate; the bottom end of the connecting plate is fixed to the base, and the top end of the connecting plate is fixed to the energized spring; when the energized spring extends or retracts, it drives the top end of the connecting plate to move.

[0018] In this invention, the button is located above the power-on terminal.

[0019] In this utility model, the support member is connected to the connecting plate.

[0020] In this design, the support component is fixedly connected to the top of the connecting plate.

[0021] In this utility model, the overload protection switch further includes a conductive mechanism, which includes a PCB board and several conductive springs. An indicator light is provided on the PCB board. The PCB board is located at the bottom of the button. The top end of the conductive spring contacts the PCB board, and the bottom end of the conductive spring contacts the base.

[0022] In this design, the buttons are transparent to allow the indicator light to shine through; the indicator light will illuminate when the overload protection switch is powered on, and will turn off when the power is off.

[0023] In this invention, the overload protection switch further includes a detachable housing, which is connected to the base and encloses a cavity; a metal plate is located inside the cavity.

[0024] In this invention, the outer shell is provided with several through holes, through which the conductive spring passes.

[0025] In this invention, the button is located above the outer shell; the energized terminal is located above the protective terminal; and the outer shell is provided with several limiting posts, which can control the movement of the button in the direction of extension and retraction of the energized spring.

[0026] In this invention, the energized spring is located between the ratchet and the energized terminal; the ratchet is rotatably mounted on the top of the energized spring, and the energized terminal is fixedly connected to the bottom of the energized spring.

[0027] In this design, the energized terminal is located at the top of the connecting plate; after the protective terminal is separated from the energized terminal, the circuit is disconnected; pressing the button at this time will cause the energized spring to rebound, the top of the connecting plate to be pulled up, and thus the support component to move upward; during the upward movement of the support component, it will touch the metal plate and drive the top of the metal plate to move upward, and finally the metal plate will return to its shape; since the top of the connecting plate is pulled up, the energized terminal is also lifted, and at this time the protective terminal is separated from the energized terminal.

[0028] In this invention, the ratchet is located below the PCB board and passes through the outer casing.

[0029] In this solution, pressing down the button pushes the ratchet downwards and compresses the energized spring, thereby achieving contact or separation between the energized terminal and the protection terminal.

[0030] The working principle of the above overload protection switch is as follows:

[0031] 1. The metal sheet is in its initial state, the top of the connecting plate is pulled up, and the power-on terminal and the protection terminal are separated; at this time, the overload protection switch is in the power-off state, and the button is in the OFF state.

[0032] 2. Press the button, and the top of the connecting plate will move down until the power terminal and the protection terminal are in contact. The overload protection switch is in the power-on state, and current flows through it. At this time, the button is in the ON state.

[0033] 3. When the current is too high, the metal sheet will deform due to heat, and the top of the metal sheet will move down, separating the protection terminal from the energized terminal. At this time, the overload protection switch is in the de-energized state.

[0034] 4. Because the circuit is broken and no current flows, the metal sheet will cool down quickly; however, since the metal sheet cannot return to its original shape, the protection terminal and the energized terminal remain separated; at this time, the overload protection switch is in the de-energized state.

[0035] 5. Pressing the button will cause the energized spring to rebound, pulling up the top of the connecting plate and causing the support to move upward. During the upward movement, the support will touch the metal plate and cause the top of the metal plate to move upward. Finally, the metal plate will return to its initial shape. Since the top of the connecting plate is pulled up, the energized terminal is also lifted, thus separating the protection terminal from the energized terminal. At this time, the overload protection switch is in the de-energized state, the circuit is not connected, and the button is in the OFF state.

[0036] 6. Press the button again, the top of the connecting plate moves down, causing the power terminal to move downward until it contacts the protection terminal; the overload protection switch is turned on, restoring the power supply state, and the internal circuit generates current again; at this time, the button is in the ON state.

[0037] The movement of the energized mechanism in this invention is achieved by using buttons, ratchet, and springs. This is a publicly disclosed technical solution, similar to the movement of a pen refill when pressed in daily life (see Chinese patent application 201821579827.2). Therefore, the specific details will not be elaborated further.

[0038] This invention solves the technical problems of complex structure, cumbersome assembly, and untimely power outage and power restoration of general switches. It is easy to operate, can be assembled efficiently, and can quickly realize power outage protection and power restoration.

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the overload protection switch in Embodiment 1;

[0041] Figure 2 This is a schematic diagram of the overload protection switch of Embodiment 1 after the buttons and housing have been removed;

[0042] Figure 3 This is a schematic diagram of the overload protection switch of Embodiment 1 after removing the button, housing and base. Detailed Implementation

[0043] Example 1

[0044] This embodiment provides an integrated overload protection switch, such as Figure 1 As shown in Figure 3, it includes a base 1, a power supply mechanism 2, an overload protection mechanism 3, a conductive mechanism 4, and a housing 5.

[0045] The power-on mechanism 2 includes a button 201 and a power-on terminal 202. The button 201 is located above the power-on terminal 202. A ratchet 203 and a power-on spring 204 are provided between the button 201 and the power-on terminal 202. The power-on spring 204 is located between the ratchet 203 and the power-on terminal 202. The ratchet 203 is rotatably mounted on the top of the power-on spring 204. The power-on spring 204 is connected to the base 1 through a movable connecting plate 205. The bottom end of the connecting plate 205 is fixed to the base 1, and the top end of the connecting plate 205 is fixed to the bottom end of the power-on spring 204. The power-on terminal 202 is fixed to the top of the connecting plate 205. The button 201 is transparent, and the connecting plate 205 is conductive.

[0046] The overload protection mechanism 3 includes a metal sheet 301 that deforms when heated and a reciprocating support member 302. The support member 302 is connected to the base 1 via a support spring 303 and is located below the metal sheet 301. The bottom end of the metal sheet 301 is connected to the base 1, and the top end of the metal sheet 301 is provided with a protective terminal 304 that can contact or separate from the energized terminal 202. The support member 302 is fixedly connected to the top end of the connecting plate 205. The energized terminal 202 is located above the protective terminal 304.

[0047] The conductive mechanism 4 includes a PCB board 401 and two conductive springs 402. An indicator light 403 is provided on the PCB board 401. The PCB board 401 is embedded in the bottom of the button 201, and the top of the conductive spring 402 is in contact with the PCB board 401.

[0048] The outer shell 5 is detachably connected to the base 1 and forms a cavity (not shown in the figure); the metal sheet 301 is located in the cavity; the outer shell 5 is provided with a through hole 501, a conductive spring 402 passes through the through hole 501 and its bottom end is connected to the connecting plate 205; the bottom end of another conductive spring 402 is connected to the conductive plate 502 fixed on the outer shell 5; the button 201 is located above the outer shell 5; the outer shell 5 is provided with two limiting posts 503, which pass through the button 201; the ratchet 203 is located below the PCB board 401 and passes through the outer shell 5.

[0049] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art may make some modifications without departing from the scope of the present invention; that is, all equivalent modifications made in accordance with the present invention should be covered by the scope of the present invention.

Claims

1. An integrated overload protection switch, characterized in that, The overload protection switch includes: Base; A power-on mechanism, comprising a button and a power-on terminal, wherein a ratchet and a power-on spring are provided between the button and the power-on terminal; An overload protection mechanism includes a metal sheet that deforms when heated and a reciprocating support member. The support member is connected to the base via a support spring and is located below the metal sheet. The bottom end of the metal sheet is connected to the base, and the metal sheet is provided with a protective terminal that can contact or separate from the energized terminal.

2. The overload protection switch as described in claim 1, characterized in that, The energized spring is connected to the base via a movable connecting plate.

3. The overload protection switch as described in claim 2, characterized in that, The button is located above the power-on terminal.

4. The overload protection switch as described in claim 3, characterized in that, The support member is connected to the connecting plate.

5. The overload protection switch as described in claim 4, characterized in that, The overload protection switch further includes a conductive mechanism, which includes a PCB board and several conductive springs. An indicator light is provided on the PCB board. The PCB board is located at the bottom of the button. The top end of the conductive spring contacts the PCB board, and the bottom end of the conductive spring contacts the base.

6. The overload protection switch as described in claim 5, characterized in that, The overload protection switch further includes a detachable housing, which is connected to the base and encloses a cavity.

7. The overload protection switch as described in claim 6, characterized in that, The outer casing has several through holes, through which the conductive spring passes.

8. The overload protection switch as described in claim 7, characterized in that, The button is located above the housing; the power terminal is located above the protection terminal.

9. The overload protection switch as described in claim 8, characterized in that, The energized spring is located between the ratchet and the energized terminal.

10. The overload protection switch as described in claim 9, characterized in that, The ratchet is located below the PCB board and passes through the housing.

Images