Mechanical switch with protection circuit
By introducing a diode and fuse structure into the mechanical switch, the current direction control problem is solved, protection and safety reminder of the load circuit are achieved, and damage caused by reverse power connection is avoided.
Patent Information
- Application Number
- CN202422395049.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Existing mechanical switches cannot control the direction of current, which can easily damage electrical appliances when the power supply is connected in the wrong direction.
A mechanical switch with a protection circuit is designed. The diode and fuse structure are used to ensure that the current can only flow into the load circuit in the correct direction, and short-circuit protection is provided in case of reverse connection. The indicator light indicates the correct connection.
It effectively avoids damage caused by reverse current access to the load circuit, protects the load circuit through short circuit of diode, and melts the fuse in case of overload to ensure circuit safety.
Smart Images
Figure CN223450753U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to switch technical field, concretely relates to a mechanical switch with protection circuit. BACKGROUND
[0002] Switch is an electronic component that can make circuit open, make current interrupt or make it flow to other circuit, the most common switch is the electromechanical device that human operates, wherein one or several electronic contacts, the "closure" of contact point indicates that the electronic contact point is conductive, allows current to flow through, the "open circuit" of switch indicates that the electronic contact point is not conductive and forms open circuit, does not allow current to flow through.
[0003] In actual application process, part electric appliance needs to distinguish the positive and negative direction of current when using, if current direction is connected reversely, can cause the breakdown damage of electronic component in electric appliance, the mechanical switch usually used has the functions of making circuit connect and disconnect and overload protection when using, however, the direction of current cannot be controlled, if power supply direction is connected reversely when wiring, the damage of circuit is easy to cause when combining switch. UTILITY MODEL CONTENTS
[0004] The utility model discloses a mechanical switch with protection circuit, it can avoid the damage of electric appliance to load circuit of current reverse direction, to solve the problem in the background art.
[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a mechanical switch with protection circuit, including seat board, the one side symmetry of seat board top is provided with the first binding post that is connected with external power supply, the other side symmetry of seat board top is provided with the second binding post for connecting load circuit, the top of seat board is provided with fuse structure, the inside of seat board is provided with the diode for preventing power supply reverse direction and access load circuit.
[0006] Further, one of the first binding posts is electrically connected to the cathode of the diode through a knife switch, and the other first binding post is electrically connected to the anode of the diode through the fuse structure.
[0007] Further, one of the second binding posts is electrically connected to the anode of the diode, and the other second binding post is electrically connected to the cathode of the diode.
[0008] Further, the top of the seat board is fixedly installed with an indicator light, which is electrically connected between one of the second binding posts and the anode of the diode.
[0009] Further, the safety structure comprises a groove arranged at the top end of the seat plate, and a connecting seat is symmetrically arranged in the groove, and a U-shaped seat is arranged on one side of the connecting seat, and the two U-shaped seats are electrically connected with the anode of the diode and one of the first connecting posts respectively.
[0010] Further, a fuse is arranged between the two U-shaped seats, and a pressing plate is arranged at the top of the groove, and inverted U-shaped plates are symmetrically arranged at the bottom end of the pressing plate, and the two inverted U-shaped plates are matched with the two U-shaped seats respectively, and the end of the fuse is clamped and connected between the matched inverted U-shaped plates and U-shaped seats.
[0011] Further, screws are symmetrically arranged on the pressing plate, and the bottom of the screw is threadedly connected at the top of the corresponding connecting seat.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the two first connecting posts are connected with the positive and negative poles of the power supply respectively, the positive and negative terminals of the load circuit are connected with the two second connecting posts respectively, the positive and negative poles on the seat plate are connected according to the indication when the load circuit is connected, when the positive and negative poles of the power supply are reversely connected with the corresponding first connecting posts, the diode will short-circuit the load circuit, thereby avoiding the damage of the current to the electric appliance when the current is passed into the load circuit. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a perspective view of the utility model Figure 1 ;
[0014] Figure 2 It is a front sectional view of the utility model
[0015] Figure 3 It is a perspective view of the utility model Figure 2 ;
[0016] Figure 4 It is a circuit diagram of the utility model.
[0017] In the drawings, the components represented by each reference numeral are listed as follows:
[0018] 1, seat plate; 2, first connecting post; 3, second connecting post; 4, knife switch; 5, safety structure; 51, groove; 52, connecting seat; 53, U-shaped seat; 54, fuse; 55, pressing plate; 56, inverted U-shaped plate; 57, screw; 6, indicator lamp; 7, diode. DETAILED DESCRIPTION
[0019] In order to make the purpose and advantages of the utility model more clear and explicit, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope of the utility model.
[0020] As shown in Figure 1 , 2 and 4, a mechanical switch with protection circuit comprises a seat plate 1, one side of the top end of the seat plate 1 is symmetrically provided with a first terminal post 2 connected with an external power supply, the other side of the top end of the seat plate 1 is symmetrically provided with a second terminal post 3 for connecting a load circuit, the top end of the seat plate 1 is provided with a fuse structure 5, and the inside of the seat plate 1 is provided with a diode 7 for preventing reverse connection of the power supply to the load circuit.
[0021] According to the above structure, in use, the two first terminal posts 2 are respectively connected with the positive and negative poles of the power supply, and the positive and negative terminals of the load circuit are respectively connected with the two second terminal posts 3. When the load circuit is connected, the positive and negative poles are connected according to the indications on the seat plate 1. When the positive and negative poles of the power supply are connected reversely with the corresponding first terminal posts 2, the diode 7 will short-circuit the load circuit, thereby avoiding the current from flowing into the load circuit to damage the electrical appliance.
[0022] As shown in Figure 1 , 2 and 4, one of the first terminal posts 2 is electrically connected with the cathode of the diode 7 through a knife switch 4, the other first terminal post 2 is electrically connected with the anode of the diode 7 through the fuse structure 5, one of the second terminal posts 3 is electrically connected with the anode of the diode 7, and the other second terminal post 3 is electrically connected with the cathode of the diode 7.
[0023] According to the above structure, when the positive and negative poles of the power supply are connected with the corresponding first terminal posts 2, the knife switch 4 is closed, and the current flows from the cathode of the diode 7 at this time. The diode 7 is equivalent to an open circuit, and the current can normally flow into the load circuit at this time. When the positive and negative poles of the power supply are reversely connected with the corresponding first terminal posts 2, the current flows from the anode of the diode 7. At this time, the diode 7 is equivalent to a conductor, thereby short-circuiting the load circuit, avoiding the reverse connection of the current to the load circuit, and playing a role in protecting the load circuit.
[0024] As shown in Figure 2 and 3 , the fuse structure 5 comprises a groove 51 provided at the top end of the seat plate 1, the groove 51 is symmetrically provided with a connecting seat 52 inside, one side of the connecting seat 52 is provided with a U-shaped seat 53, the two U-shaped seats 53 are respectively electrically connected with the anode of the diode 7 and one of the first terminal posts 2, a fuse 54 is arranged between the two U-shaped seats 53, a pressing plate 55 is arranged at the top of the groove 51, the bottom end of the pressing plate 55 is symmetrically provided with an inverted U-shaped plate 56, the two inverted U-shaped plates 56 are respectively matched with the two U-shaped seats 53, the end of the fuse 54 is clamped and connected between the matched inverted U-shaped plate 56 and U-shaped seat 53, and the pressing plate 55 is symmetrically provided with a screw 57, the bottom of the screw 57 is threadedly connected to the top of the corresponding connecting seat 52.
[0025] According to the above structure, the fuse 54 plays a role of protecting the circuit, when the diode 7 short-circuits the load circuit for a long time, the fuse 54 is fused by temperature rising, thereby protecting the circuit, the end of the fuse 54 is clamped and connected between the inverted U-shaped plate 56 and the U-shaped seat 53, the fuse 54 can be replaced after the pressing plate 55 is opened, the inverted U-shaped plate 56 can automatically press the fuse 54 in the U-shaped seat 53 after the pressing plate 55 is installed, thereby conveniently replacing the fuse 54.
[0026] As shown in Figure 1 and 2 The seat plate 1 is fixedly provided with an indicating lamp 6 at the top end, and the indicating lamp 6 is electrically connected between one of the second connecting posts 3 and the anode of the diode 7.
[0027] According to the above structure, when the load circuit is connected, the indicating lamp 6 is lighted, if the load circuit is not connected, it is indicated that the load circuit is disconnected by the diode 7, at this time, the indicating lamp 6 is not lighted, the knife switch 4 needs to be immediately disconnected to avoid the diode 7 being short-circuited for a long time, whether the power supply is normally connected to the circuit can be known by observing the indicating lamp 6.
[0028] The working principle of the utility model is as follows: when the positive and negative poles of the power supply are connected with the corresponding indicated first connecting post 2, the knife switch 4 is closed, at this time, the current flows from the cathode of the diode 7, the diode 7 is equivalent to a disconnection, at this time, the current can normally flow into the load circuit, when the positive and negative poles of the power supply are reversely connected with the corresponding indicated first connecting post 2, the current flows from the anode of the diode 7, at this time, the diode 7 is equivalent to a wire, thereby short-circuiting the load circuit, avoiding the current being reversely connected to the load circuit, playing a role of protecting the load circuit, the fuse 54 plays a role of protecting the circuit, when the diode 7 short-circuits the load circuit for a long time, the fuse 54 is fused by temperature rising, thereby protecting the circuit, the end of the fuse 54 is clamped and connected between the inverted U-shaped plate 56 and the U-shaped seat 53, the fuse 54 can be replaced after the pressing plate 55 is opened, the inverted U-shaped plate 56 can automatically press the fuse 54 in the U-shaped seat 53 after the pressing plate 55 is installed, thereby conveniently replacing the fuse 54, when the load circuit is connected, the indicating lamp 6 is lighted, if the load circuit is not connected, it is indicated that the load circuit is disconnected by the diode 7, at this time, the indicating lamp 6 is not lighted, the knife switch 4 needs to be immediately disconnected to avoid the diode 7 being short-circuited for a long time, whether the power supply is normally connected to the circuit can be known by observing the indicating lamp 6.
[0029] The preferred embodiments of the utility model are described above, it should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, these improvements and refinements should also be regarded as the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.
Claims
1. A mechanical switch with a protective circuit, comprising a base plate (1), characterized in that: A first terminal (2) connected to an external power supply is symmetrically provided on one side of the top of the base plate (1), a second terminal (3) for connecting to a load circuit is symmetrically provided on the other side of the top of the base plate (1), a safety structure (5) is provided on the top of the base plate (1), and a diode (7) for preventing the power supply from being reversely connected to the load circuit is provided inside the base plate (1); One of the first binding posts (2) is electrically connected to the cathode of the diode (7) via a knife switch (4), and the other of the first binding posts (2) is electrically connected to the anode of the diode (7) via a fuse structure (5); One of the second binding posts (3) is electrically connected to the anode of the diode (7), and the other of the second binding posts (3) is electrically connected to the cathode of the diode (7).
2. The mechanical switch with a protection circuit according to claim 1, characterized in that: An indicator light (6) is fixedly mounted on the top of the seat plate (1), and the indicator light (6) is electrically connected between one of the second terminals (3) and the anode of the diode (7).
3. The mechanical switch with a protection circuit according to claim 2, characterized in that: The safety structure (5) comprises a groove (51) arranged at the top of the base plate (1), a connecting seat (52) is symmetrically arranged inside the groove (51), a U-shaped seat (53) is arranged on one side of the connecting seat (52), and the two U-shaped seats (53) are electrically connected to the anode of the diode (7) and one of the first terminals (2) respectively.
4. The mechanical switch with a protection circuit according to claim 3, characterized in that: A fuse (54) is provided between the two U-shaped seats (53), a pressure plate (55) is provided at the top of the groove (51), an inverted U-shaped plate (56) is symmetrically provided at the bottom end of the pressure plate (55), the two inverted U-shaped plates (56) respectively cooperate with the two U-shaped seats (53), and the end of the fuse (54) is snap-connected between the mutually cooperating inverted U-shaped plates (56) and the U-shaped seats (53).
5. The mechanical switch with a protection circuit according to claim 4, characterized in that: Screws (57) are symmetrically arranged on the pressure plate (55), and the bottom of the screw (57) is threadedly connected to the top of the corresponding connection seat (52).