A switch with overload protection structure

Abstract

The utility model discloses a switch with overload protection structure. The utility model, including the casing: the top of casing swing is provided with the pressing part, both sides of pressing part bottom all are provided with elastic part, the middle position of pressing part bottom is provided with the connecting piece, both sides of casing all are provided with the clamping piece, the bottom of casing is installed with first connecting piece, second connecting piece and third connecting piece from right side to left side in proper order. The utility model, through the cooperation of movable contact piece, metal sheet and movable part, forms overload protection structure, when the electric tool is overloaded, the metal sheet is curved because of the circuit overload heating, drives the two parts of the upper cutting of movable contact piece to carry out the bending, thereby drives movable part to move on movable contact piece, makes the connection between movable part and main contact piece break, plays the purpose of protecting electric tool circuit.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, specifically to a switch with an overload protection structure. Background Technology

[0002] A power tool switch is a specialized switch device that integrates intelligent control functions for power tools. It is compatible with both AC and DC operating environments and can be used in power tools such as electric drills, electric hammers, and cutting machines. Existing power tool switches have relatively simple structures and lack overload protection. Since the output of a power tool may jam, the internal circuitry of the power tool may be damaged due to overload. Therefore, a switch with an overload protection structure is needed. Utility Model Content

[0003] The purpose of this invention is to provide a switch with an overload protection structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a switch with an overload protection structure, comprising a housing: a pressing component is movably disposed on the top of the housing; elastic components are disposed on both sides of the bottom of the pressing component; a connecting component is disposed at the middle position of the bottom of the pressing component; a locking component is disposed on both sides of the housing; a first connecting piece, a second connecting piece, and a third connecting piece are sequentially installed on the bottom of the housing from right to left; normally closed contact, normally open contact, and main contact are sequentially disposed inside the housing via the first connecting piece, the second connecting piece, and the third connecting piece; a movable contact is installed inside the housing via the connecting component; a metal plate is installed on the top and bottom sides of the movable contact away from the normally open contact; and a movable component is movably disposed on the side of the movable contact close to the metal plate.

[0005] By adopting the above technical solution, the moving contact and the metal sheet cooperate to form a bimetallic strip, while the moving part and the moving contact cooperate to form an overload protection structure. When the power tool is overloaded, the metal sheet on the moving contact bends due to the heating of the current, thereby pushing the moving part to move on the moving contact, disconnecting the connection between the moving part and the main contact, so that the circuit inside the power tool is in an open circuit state, thus achieving the purpose of protecting the circuit.

[0006] Preferably, a support component is provided at the middle position on both sides inside the housing. The support component and the pressing component inside the housing are both connected to the elastic component, which is composed of a telescopic component and a spring.

[0007] By adopting the above technical solution, the pressing component can rebound after being pressed through the cooperation between the supporting component and the elastic component.

[0008] Preferably, the tops of the first connecting piece, the second connecting piece, and the third connecting piece all penetrate the bottom of the housing and extend into the interior of the housing.

[0009] By adopting the above technical solution, the first connecting piece, the second connecting piece, and the third connecting piece penetrate through the bottom of the housing and are stably and firmly installed on the housing, and the first connecting piece, the second connecting piece, and the third connecting piece are prevented from falling off the housing.

[0010] Preferably, both the normally closed contact and the normally open contact are L-shaped, and each of the normally closed contact, the normally open contact, and the moving contact is provided with a raised contact point, and the positions of the raised contacts on the normally closed contact, the normally open contact, and the moving contact are matched.

[0011] By adopting the above technical solution, the pressing component drives the connecting piece to rise and fall, thereby driving the moving contact piece to rise and fall, so that the convex contact on the moving contact piece can contact the convex contact on the normally open contact piece. After the pressing component rebounds, the convex contact on the moving contact piece contacts the convex contact on the normally closed contact piece.

[0012] Preferably, a connection port is provided at the bottom of one side of the connector, and the size of the connection port on the connector is adapted to the size of the moving contact piece. The connector is connected to the moving contact piece through the connection port.

[0013] By adopting the above technical solution, the moving contact is stably and securely installed on the connector through the connection port, preventing the moving contact from falling off the connector, and the connection port on the connector can be replaced with a slot.

[0014] Preferably, the top and bottom of the movable contact piece are provided with grooves on the side near the movable part. The size of the grooves on the movable contact piece is adapted to the size of the metal sheet. The movable contact piece and the metal sheet are welded together through the grooves. The side of the movable contact piece near the movable part is cut into two parts.

[0015] By adopting the above technical solution, when the power tool is overloaded, the metal sheet bends due to heat. Since there are metal sheets at the top and bottom of the moving contact piece, and one side of the moving contact piece is divided into two parts, the metal sheet bends due to heat, causing the two parts of the moving contact piece to bend accordingly, thereby driving the moving part to move on the moving contact piece and disconnecting the connection between the moving part and the main contact piece.

[0016] Preferably, the movable component is made of conductive material, and the movable component is sleeved with the moving contact piece, and the main contact piece and the moving contact piece are connected through the movable component.

[0017] By adopting the above technical solution, since the moving part is made of conductive material, the main contact and the moving contact are electrically connected through the moving part.

[0018] Preferably, push blocks are provided at both ends of the movable component, and sliding grooves are provided on one side of both ends of the housing. The size of the push blocks on the movable component is adapted to the size of the sliding grooves on the housing, and the movable component is slidably connected to the housing through the push blocks and sliding grooves.

[0019] By adopting the above technical solution, after the power tool is overloaded, the user can push the push block to move the moving part inside the housing, so that the moving part can reconnect the main contact and the moving contact.

[0020] Compared with the prior art, the beneficial effects of this utility model are: the switch with overload protection structure forms an overload protection structure through the cooperation between the moving contact, the metal plate and the moving part. When the power tool is overloaded, the metal plate bends due to the heat generated by the overload of the circuit, which drives the two parts cut on the moving contact to bend, thereby driving the moving part to move on the moving contact, so that the connection between the moving part and the main contact is broken, thus achieving the purpose of protecting the power tool circuit. Attached Figure Description

[0021] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0022] Figure 2 This is a front view of the structure of this utility model;

[0023] Figure 3 This is a side view of the structure of this utility model;

[0024] Figure 4 This is a sectional view of the main structure of this utility model;

[0025] Figure 5 This utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0026] In the diagram: 1. Housing; 2. Pressing component; 3. Elastic component; 4. Connector; 5. Clip; 6. First connecting piece; 7. Second connecting piece; 8. Third connecting piece; 9. Normally closed contact; 10. Normally open contact; 11. Main contact; 12. Moving contact; 13. Metal sheet; 14. Movable component. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5This utility model provides an embodiment of a switch with an overload protection structure, comprising a housing 1; a pressing component 2 is movably disposed on the top of the housing 1; elastic components 3 are disposed on both sides of the bottom of the pressing component 2; a connecting component 4 is disposed at the middle position of the bottom of the pressing component 2; locking components 5 are disposed on both sides of the housing 1; a first connecting piece 6, a second connecting piece 7, and a third connecting piece 8 are sequentially installed from right to left on the bottom of the housing 1; normally closed contact 9, normally open contact 10, and main contact 11 are sequentially disposed inside the housing 1 via the first connecting piece 6, the second connecting piece 7, and the third connecting piece 8; and a moving contact 11 is installed inside the housing 1 via the connecting component 4. The movable contact 12 has a metal plate 13 installed on its top and bottom sides away from the normally open contact 10. A movable member 14 is movably disposed on the side of the movable contact 12 close to the metal plate 13. The movable contact 12 and the metal plate 13 cooperate to form a bimetallic strip, while the movable member 14 and the movable contact 12 cooperate to form an overload protection structure. When the power tool is overloaded, the metal plate 13 on the movable contact 12 bends due to the heating of the current, thereby pushing the movable member 14 to move on the movable contact 12, disconnecting the connection between the movable member 14 and the main contact 11, so that the circuit inside the power tool is in an open circuit state, thus achieving the purpose of protecting the circuit.

[0029] In this embodiment, a support component is provided at the middle position on both sides inside the housing 1. The support component and the pressing component 2 inside the housing 1 are both connected to the elastic component 3. The elastic component 3 is composed of a telescopic component and a spring. Through the cooperation between the support component and the elastic component 3, the pressing component 2 can rebound after being pressed.

[0030] In this embodiment, the tops of the first connecting piece 6, the second connecting piece 7, and the third connecting piece 8 all penetrate the bottom of the housing 1 and extend into the interior of the housing 1. The first connecting piece 6, the second connecting piece 7, and the third connecting piece 8 penetrate the bottom of the housing 1 and are stably and firmly installed on the housing 1, and prevent the first connecting piece 6, the second connecting piece 7, and the third connecting piece 8 from falling off the housing 1.

[0031] In this embodiment, both the normally closed contact 9 and the normally open contact 10 are L-shaped. The normally closed contact 9, the normally open contact 10, and the moving contact 12 are all provided with protruding contacts. The positions of the protruding contacts on the normally closed contact 9, the normally open contact 10, and the moving contact 12 are matched. The pressing component 2 drives the connecting component 4 to rise and fall, thereby driving the moving contact 12 to rise and fall, so that the protruding contacts on the moving contact 12 can contact the protruding contacts on the normally open contact 10. After the pressing component 2 rebounds, the protruding contacts on the moving contact 12 contact the protruding contacts on the normally closed contact 9.

[0032] In this embodiment, a connection port is provided at the bottom of one side of the connector 4. The size of the connection port on the connector 4 is adapted to the size of the moving contact piece 12. The connector 4 is connected to the moving contact piece 12 through the connection port. The moving contact piece 12 is stably and firmly installed on the connector 4 through the connection port to prevent the moving contact piece 12 from falling off the connector 4. Furthermore, the connection port on the connector 4 can be replaced with a slot.

[0033] In this embodiment, grooves are provided on the top and bottom sides of the movable contact 12 near the movable member 14. The size of the grooves on the movable contact 12 is adapted to the size of the metal sheet 13. The movable contact 12 and the metal sheet 13 are welded together through the grooves. The side of the movable contact 12 near the movable member 14 is cut into two parts. When the power tool is overloaded, the metal sheet 13 bends due to heat. Since the metal sheet 13 is provided on both the top and bottom of the movable contact 12, and one side of the movable contact 12 is cut into two parts, the two parts of the movable contact 12 can bend due to the heat and bending of the metal sheet 13, thereby driving the movable member 14 to move on the movable contact 12, and disconnecting the connection between the movable member 14 and the main contact 11.

[0034] In this embodiment, the movable element 14 is made of conductive material and is sleeved with the moving contact 12. The main contact 11 and the moving contact 12 are connected through the movable element 14. Since the movable element 14 is made of conductive material, the main contact 11 and the moving contact 12 are electrically connected through the movable element 14.

[0035] In this embodiment, push blocks are provided at both ends of the movable part 14, and sliding grooves are provided on one side of both ends of the housing 1. The size of the push block on the movable part 14 is adapted to the size of the sliding groove on the housing 1. The movable part 14 is slidably connected to the housing 1 through the push block and the sliding groove. After the power tool is overloaded, the user pushes the push block to move the movable part 14 inside the housing 1, so that the movable part 14 can reconnect the main contact piece 11 and the moving contact piece 12.

[0036] Working principle: The user presses the component 2 to move the connecting component 4 up and down, thereby moving the movable contact 12 up and down, so that the convex contact on the movable contact 12 can contact the convex contact on the normally open contact 10. After the pressing component 2 rebounds, the convex contact on the movable contact 12 contacts the convex contact on the normally closed contact 9. Since the movable contact 12 and the metal piece 13 cooperate to form a bimetallic strip, and the movable component 14 and the movable contact 12 cooperate to form an overload protection structure, when the power tool is overloaded, the metal piece 13 on the movable contact 12 bends due to the heating of the current, thereby pushing the movable component 14 to move on the movable contact 12, disconnecting the connection between the movable component 14 and the main contact 11, so that the internal circuit of the power tool is in an open circuit state, thus achieving the purpose of protecting the circuit.

[0037] For those skilled in the art, this invention is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or scope of this invention. Therefore, the embodiments of this invention are exemplary and not restrictive. The scope of this invention is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A switch with an overload protection structure, comprising a housing (1), characterized in that: A pressing component (2) is movably provided on the top of the housing (1). Elastic components (3) are provided on both sides of the bottom of the pressing component (2). A connecting component (4) is provided in the middle of the bottom of the pressing component (2). A locking component (5) is provided on both sides of the housing (1). A first connecting piece (6), a second connecting piece (7), and a third connecting piece (8) are installed sequentially from right to left on the bottom of the housing (1). A normally closed contact piece (9), a normally open contact piece (10), and a main contact piece (11) are arranged sequentially through the first connecting piece (6), the second connecting piece (7), and the third connecting piece (8) inside the housing (1). A movable contact piece (12) is installed inside the housing (1) through the connecting component (4). A metal piece (13) is installed on the top and bottom of the movable contact piece (12) away from the normally open contact piece (10). A movable component (14) is movably provided on the side of the movable contact piece (12) close to the metal piece (13).

2. A switch with an overload protection structure according to claim 1, characterized in that: Supporting components are provided at the middle positions on both sides inside the housing (1). The supporting components and pressing components (2) inside the housing (1) are connected to the elastic component (3). The elastic component (3) is composed of a telescopic component and a spring.

3. A switch with an overload protection structure according to claim 1, characterized in that: The tops of the first connecting piece (6), the second connecting piece (7) and the third connecting piece (8) all penetrate the bottom of the housing (1) and extend into the interior of the housing (1).

4. A switch with an overload protection structure according to claim 1, characterized in that: The normally closed contact (9) and normally open contact (10) are both L-shaped. The normally closed contact (9), normally open contact (10) and moving contact (12) are all provided with protruding contacts. The positions of the protruding contacts on the normally closed contact (9), normally open contact (10) and moving contact (12) are matched.

5. A switch with an overload protection structure according to claim 1, characterized in that: A connection port is provided at the bottom of one side of the connector (4). The size of the connection port on the connector (4) is adapted to the size of the moving contact piece (12). The connector (4) is connected to the moving contact piece (12) through the connection port.

6. A switch with an overload protection structure according to claim 1, characterized in that: The movable contact piece (12) has grooves on the top and bottom sides near the movable part (14). The size of the grooves on the movable contact piece (12) is adapted to the size of the metal sheet (13). The movable contact piece (12) and the metal sheet (13) are welded together through the grooves. The movable contact piece (12) is divided into two parts on the side near the movable part (14).

7. A switch with an overload protection structure according to claim 1, characterized in that: The movable part (14) is made of conductive material and is sleeved with the moving contact piece (12). The main contact piece (11) and the moving contact piece (12) are connected through the movable part (14).

8. A switch with an overload protection structure according to claim 1, characterized in that: Both ends of the movable part (14) are provided with push blocks, and both sides of the housing (1) are provided with sliding grooves. The size of the push block on the movable part (14) is adapted to the size of the sliding groove on the housing (1). The movable part (14) is slidably connected to the housing (1) through the push block and the sliding groove.

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