Split overload protection switch

Abstract

The utility model provides a kind of split overload protection switch, it includes: base;Power-on mechanism, it includes button and can be contacted or separated from base 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 being heated and the insulating sheet with through-hole, and the insulating sheet is connected with base by insulating spring;Metal sheet bottom end is connected with base, and protection terminal is equipped on metal sheet, and protection terminal passes through through-hole and is contacted with base.The utility model is easy to operate, and power-off protection and recovery power-on can be realized quickly.

Description

Technical Field

[0001] This utility model relates to a split-type 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 202223049229.3 discloses a ship-shaped overload protection switch with an improved overload protection spring, including a body and a button. A current-connecting chamber is provided in the body, and the button is installed on the upper opening of the current-connecting chamber. A first pin, a second pin, and a third pin are arranged sequentially at intervals in the current-connecting chamber. A bimetallic strip is provided between the first pin and the second pin. The bimetallic strip consists of a fixing part, a current-connecting part, a lifting part, and a snap-fit ​​part. The fixing part is fixed to the first pin, the current-connecting part is riveted with a current-connecting contact that cooperates with the second pin, the lifting part is connected to the button, and the snap-fit ​​part is snap-fitted to the first end of an overload protection spring. A clearance bending part is provided on the rear side of the first end of the overload protection spring.

[0005] Chinese Patent 202010473543.0 discloses a switch operating mechanism with overload protection, including a mechanism housing and a power motor, gearbox, torque limiter, and electromechanical control device disposed within the mechanism housing. The gearbox has a multi-turn power output end and a control power output end, and the power input end of the gearbox is connected to the power motor through the torque limiter. The electromechanical control device includes a lead screw connected to the control power output end, a nut mounted on the lead screw, and a first micro switch and a second micro switch for detecting the position of the nut. When the nut reaches the detection position of the first micro switch, the first micro switch controls the power motor to be energized, and when the nut reaches the detection position of the second micro switch, the second micro switch controls the power motor to be de-energized.

[0006] The drawbacks of the above technical solution are that the structure is relatively complex, the assembly is cumbersome, 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 is easy to install automatically and operate has become a problem that the industry needs to solve. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a split-type overload protection switch, which is easy to operate and can quickly realize power failure protection and power restoration.

[0009] To achieve the above objectives, this utility model provides a split-type overload protection switch, which includes:

[0010] Base;

[0011] The power-on mechanism includes a button and a power-on terminal that can contact or separate from the base. A ratchet and a power-on spring are provided between the button and the power-on terminal.

[0012] The overload protection mechanism includes a metal sheet that deforms when heated and an insulating sheet with through holes. The insulating sheet is connected to the base via an insulating spring. The bottom end of the metal sheet is connected to the base, and a protection terminal is provided on the metal sheet. The protection terminal passes through the through hole and contacts the base.

[0013] In this design, the protection terminal is located at the top of the metal plate.

[0014] When the current is too high, the metal sheet will heat up and deform, causing the protection terminal to lose contact with the base, 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. It will then return to its original shape after a short time.

[0016] When a metal sheet deforms, it is a whole-body deformation. Different forming methods can be selected to manufacture metal sheets according to different needs.

[0017] The present invention relates to a split-type overload protection switch, wherein the switch and the protector are independent of each other.

[0018] Compared to integrated overload protection switches (where the switch and protector are combined into one unit), the advantages of this invention are: overload does not affect the switch's lifespan, and the switch's lifespan does not affect the protector's performance; there is no mutual influence between the protector and the switch. If the switch and protector are integrated, the product has two moving contacts: the switch contact and the protector contact. Overload and lifespan issues can cause mutual interference, leading to a shortened lifespan and accelerated temperature rise. Therefore, in terms of service life and stability, the separate structure is more advantageous.

[0019] Compared to the traditional solution (a combination of overload protector and switch), the advantages of this invention are: the traditional solution is a combination of two components, an overload protector and a switch, which is not only wasteful of costs but also occupies a large space. This invention's split-type overload protection switch integrates overload protection and switching functions, achieving space reduction, cost savings, and no impact on functionality.

[0020] According to another specific embodiment of the present invention, the energized spring is connected to the base through 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.

[0021] According to another specific embodiment of this utility model, the button is located above the insulating sheet and the power-conducting terminal.

[0022] According to another specific embodiment of the present invention, the base is provided with an electrical contact that can contact the electrical terminal.

[0023] In this solution, the contact or separation of the energized terminal and the energized contact is achieved by pressing down the button.

[0024] According to another specific embodiment of the present invention, the base is provided with protective contacts that can contact the protective terminals.

[0025] In this design, when the protection terminal contacts the protection contact, the insulating sheet is held in place; when the metal sheet is heated and deformed, the protection terminal separates from the protection contact, the protection terminal no longer passes through the through hole, and the insulating spring lifts the insulating sheet; after the metal sheet returns to its shape, the protection terminal contacts the area below the through hole of the insulating sheet, and the insulating sheet separates the protection terminal from the protection contact.

[0026] According to another specific embodiment of the present invention, the overload protection switch further includes a detachable housing, which is connected to the base and encloses a cavity.

[0027] According to another specific embodiment of the present invention, the insulating sheet is located inside the cavity, and the outer shell has an opening above the insulating sheet.

[0028] According to another specific embodiment of the present invention, the button is located above the outer shell and passes through the outer shell; 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.

[0029] In this solution, when the insulating sheet is lifted and separates the protection terminal from the protection contact, the insulating sheet will pass through the opening above it; pressing the button at this time will press the insulating sheet down until the protection terminal passes through the through hole again and locks the insulating sheet in place, and at the same time the protection terminal and the protection contact will make contact again.

[0030] According to another specific embodiment of the present 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 fixed to the bottom of the energized spring.

[0031] In this design, when the energized terminal and the energized contact are in contact, the button and the ratchet are in a separable state, and the button has a certain amount of free movement space; when the energized terminal and the energized contact are separated, the button and the ratchet remain in contact.

[0032] According to another specific embodiment of the present invention, the metal sheet is located inside the cavity.

[0033] According to another specific embodiment of the present invention, the protective terminal is located in the middle of the metal sheet.

[0034] The working principle of the above overload protection switch is as follows:

[0035] 1. In the initial state, the energized terminal and the energized contact are separated; the protective terminal and the protective contact are in contact, and the insulating sheet is stuck.

[0036] 2. Press the button to make the energized terminal and the energized contact, and the overload protection switch is in the energized state, and current flows through it.

[0037] 3. When the current is too large, the metal sheet deforms due to heat, and the protective terminal separates from the protective contact; the insulating sheet loses its restraint and is pushed up by the insulating spring, which at the same time separates the protective terminal from the protective contact; at this time, the insulating sheet will pass through the opening above it;

[0038] 4. Because the circuit is broken and no current flows through it, the metal sheet will cool down quickly and return to its shape; however, since the insulating sheet has been popped up, after the metal sheet returns to its shape, the protective terminal will contact the area below the through hole of the insulating sheet, and the protective terminal and the protective contact are separated by the insulating sheet.

[0039] 5. Press the button to press down the insulating sheet until the protection terminal passes through the through hole again and locks the insulating sheet in place, and the protection terminal contacts the protection contact again; after the button is pressed down, the ratchet and the energizing spring pull up the energizing terminal, separating it from the energizing contact; at this time, the overload protection switch is off and the circuit is not connected.

[0040] 6. Press the button again to move the energized terminal downwards until it contacts the energized contact; the overload protection switch is activated, restoring the energized state, and the internal circuit generates current again.

[0041] 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.

[0042] 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.

[0043] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the overload protection switch in Example 1 (insulating sheet popped up);

[0045] Figure 2 This is a schematic diagram of the overall structure of the overload protection switch after the outer casing is removed in Embodiment 1;

[0046] Figure 3 This is a schematic diagram of the overall structure of the overload protection switch after the outer casing is removed in Embodiment 1;

[0047] Figure 4 This is a schematic diagram of the overload protection mechanism of Embodiment 1 after the insulating sheet has been removed;

[0048] Figure 5 This is a schematic diagram of the insulating sheet in Example 1;

[0049] Figure 6 This is a schematic diagram of the overall structure of the overload protection switch after the outer casing is removed, as shown in Example 2. Detailed Implementation

[0050] Example 1

[0051] This embodiment provides a split-type overload protection switch, such as... Figure 1 As shown in Figure 5, it includes a base 1, a power supply mechanism 2, an overload protection mechanism 3, and a housing 4.

[0052] The power-on mechanism 2 includes a button 201 and a power-on terminal 202 that can contact or separate from the base 1. 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, and the power-on terminal 202 is fixed to the bottom 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 of the connecting plate 205 is fixed to the base 1, and the top of the connecting plate 205 is fixed to the power-on spring 204.

[0053] The overload protection mechanism 3 includes a metal sheet 301 that deforms when heated and an insulating sheet 302; the insulating sheet 302 has a through hole 303 and is connected to the base 1 through an insulating spring 304, and there are two insulating springs 304; the bottom end of the metal sheet 301 is connected to the base 1, and the top end of the metal sheet 301 has a protection terminal 305, which passes through the through hole 303 and contacts the base 1; the button 201 is located above the insulating sheet 302 and the power terminal 202.

[0054] The outer shell 4 is detachably connected to the base 1 and forms a cavity (not shown in the figure); the insulating sheet 302 and the metal sheet 301 are both located in the cavity, and the outer shell 4 has an opening 401 above the insulating sheet 302; the button 201 is located above the outer shell 4 and passes through the outer shell 4; the outer shell 4 has two limiting posts 402 that pass through the button 201.

[0055] The base 1 is provided with an energized contact 101 that can contact the energized terminal 202 and a protective contact 102 that can contact the protective terminal 305.

[0056] The button 201 is provided with ratchet teeth 206 that match the shape of ratchet 203 at the position where it contacts the ratchet 203.

[0057] Example 2

[0058] This embodiment provides a split-type overload protection switch, such as... Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that the protection terminal 2305 is located in the middle of the metal sheet 2301; the metal sheet 2301 is provided with a groove (not shown in the figure).

[0059] 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. A split-type overload protection switch, characterized in that, The overload protection switch includes: Base; A power-on mechanism, comprising a button and a power-on terminal that can contact or separate from the base, 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 an insulating sheet with a through hole. The insulating sheet is connected to the base via an insulating spring. The bottom end of the metal sheet is connected to the base, and a protection terminal is provided on the metal sheet. The protection terminal passes through the through hole and contacts the base.

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 insulating sheet and the power-conducting terminal.

4. The overload protection switch as described in claim 3, characterized in that, The base is provided with power contacts that can contact the power terminals.

5. The overload protection switch as described in claim 4, characterized in that, The base is provided with protective contacts that can contact the protective terminals.

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 insulating sheet is located inside the cavity, and the outer shell has an opening above the insulating sheet.

8. The overload protection switch as described in claim 7, characterized in that, The button is located above the housing and passes through the housing.

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 metal sheet is located inside the cavity.

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