Redundant contact electric tool switch

Abstract

The invention relates to the technical field of electric tool switches, in particular to a redundant contact electric tool switch which comprises a shell, a mounting structure, a control structure, a sealing structure, a driving structure and a triggering structure. The arrangement of the trigger structure realizes double-point contact, the design of the redundant contact system avoids the problem of poor contact caused by abrasion of a single contact, avoids the problem of repeated disassembly of the switch for maintenance, improves the practicability, and meanwhile, the movable and static contacts are not easy to fall off when being in contact, are strong in stability, and are convenient to maintain. The arrangement of the sealing structure ensures the overall sealing performance inside the switch, avoids the problem of poor contact caused by dust entering the switch, avoids the problem that a sealing ring at the joint of the button and the shell is easy to fall off, and the arrangement of the control structure realizes the switching between a switching mode and a rotating speed adjusting mode. The rotating speed of the electric tool is adjusted by pressing the button, and flexibility is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tool switch, in particular to a redundant contact electric tool switch. BACKGROUND

[0002] The electric tool switch is a core control component for controlling the power on-off of the electric tool, adjusting the output power or changing the operation mode, which mainly moves the internal switching piece by pressing the driving piece, and the switching piece makes the movable contact and the static contact connected or disconnected, or changes the contact position on the copper mode, thereby controlling the current on-off, or adjusting the motor current and voltage, finally realizing the functions of tool start-stop or speed regulation, mode switching, etc.

[0003] In the use process of the traditional switch, the button is mainly pressed to make the movable contact on the switching piece directly contact with the static contact inside the switch, so as to realize the functions of tool start-stop or speed regulation, etc. However, since the electric tool will continuously generate high-frequency vibration during operation, the movable contact and the static contact are easy to be separated or worn, which can cause the failure of the contact system, the loss of control of the speed, etc. Moreover, when the contact is worn, the switch needs to be repeatedly disassembled for maintenance or replacement, which is complicated and has low flexibility. The switching piece inside the switch is usually directly moved by the push rod, which can not avoid the problem of poor contact caused by dust entering the inside of the switch. Usually, a rubber ring is directly sleeved on the outside end of the push rod, but the rubber ring is easy to fall off or shift during repeated pushing of the push rod, which causes poor sealing effect and poor applicability of the switch. When the electric tool accidentally falls to the ground, since the cover plate of the switch is usually directly clamped on the shell, the cover plate is easy to fall off from the shell, which can cause the internal parts to loosen or fall off, and the practicability is poor. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a redundant contact electric tool switch.

[0005] The technical scheme adopted by the present application to solve the technical problems is: a redundant contact electric tool switch, comprising a shell, a mounting structure mounted on the shell, a sealing structure connected to the shell, a driving structure provided on the sealing structure, and a trigger structure provided on the mounting structure. The mounting structure comprises a card seat, the bottom of the shell is clamped with the card seat, the trigger structure comprises a first switching sheet and two convex points fixedly connected to the first switching sheet, the first switching sheet is slidingly connected to the card seat, the end of the first switching sheet is slidingly connected to the shell, a tension spring is fixedly connected between the first switching sheet and the card seat, a first terminal sheet and a second terminal sheet are clamped between the card seat and the shell respectively, the first switching sheet is slidingly connected to the first terminal sheet, a second switching sheet and a third switching sheet are slidingly connected to the two sides of the second terminal sheet respectively, the second switching sheet and the third switching sheet are slidingly connected to the card seat, springs are fixedly connected between the end of the second switching sheet and the third switching sheet and the shell respectively, a main contact point and a vice contact point are fixedly connected to the other end of the second switching sheet and the third switching sheet respectively, the main contact point and the adjacent convex point are in contact with each other, the driving structure comprises a push rod, the push rod is slidingly connected between the shell and the card seat, and the end of the push rod is in contact with the first switching sheet.

[0006] Specifically, the other end of the first switching sheet is fixedly connected with two contact sheets, and the side edges of the contact sheets are provided with copper molds.

[0007] Specifically, the convex part of the convex point is a semicircular structure, the cross sections of the main contact point and the vice contact point are both in the shape of a "V", the first terminal sheet is in the shape of an "L", the second terminal sheet is in the shape of a "T", the second switching sheet and the third switching sheet are both in the shape of a "U", and the first terminal sheet and the second terminal sheet are both fixedly connected with second electric wires.

[0008] Specifically, a cover is clamped on the card seat, two first convex blocks are fixedly connected to the card seat, and two first clamping grooves are formed in the shell, the first convex blocks and the adjacent first clamping grooves are clamped with each other.

[0009] Specifically, a control structure is mounted on the card seat, the control structure comprises a main plate and a plurality of first electric wires fixedly connected to the bottom of the main plate, the main plate is clamped on the card seat, the two sides of the main plate are in contact with the shell, the first electric wires are in contact with the cover, and the first electric wires are clamped on the side wall of the shell.

[0010] Specifically, a shift gear is clamped on the card seat, the two sides of the shift gear are in contact with the main plate and the shell respectively, a rotating sheet is rotatably connected to the shell at a position close to the shift gear, and the rotating sheet and the corresponding grooves on the shift gear are clamped with each other.

[0011] Specifically, two groups of copper molds are fixedly connected to the side of the main plate close to the first switching sheet, and the copper molds are slidingly connected to the adjacent contact sheets.

[0012] Specific, the sealing structure includes a top cover and two second protrusions fixedly connected to the top cover, the top of the shell is clamped with the top cover, two second clamping grooves are arranged on the shell, and the second protrusions and the adjacent second clamping grooves are clamped with each other.

[0013] Specific, the shell is fixedly connected with a base, the top cover is fixedly connected with a top base near the base, the base and the top base abut with each other, and a connecting cover is threadedly connected between the base and the top base.

[0014] Specific, the base and the top base are clamped with a rubber sleeve, the rubber sleeve abuts against the connecting cover, the base is fixedly connected with a positioning sleeve, a push rod is slidably connected between the base and the positioning sleeve, the push rod is slidably connected with the rubber sleeve, the push rod is slidably connected with the top base and the connecting cover, a button is fixedly connected to the outer side end of the push rod, a stopper is fixedly connected to the inner side section of the push rod, and the stopper is slidably connected with the top cover.

[0015] The beneficial effects of the present application are: (1) The electric tool switch with redundant contact provided by the present application is provided with a mounting structure on the shell, the mounting structure is connected with a trigger structure, the trigger structure is used in cooperation with a driving structure, the trigger structure is provided to realize double-point contact, the design of the redundant contact system avoids the problem of poor contact caused by wear of a single contact point, avoids the problem of repeatedly disassembling the switch for maintenance, improves practicality, and the dynamic and static contact points are not easy to fall off when being in contact, and have high stability.

[0016] (2) The electric tool switch with redundant contact provided by the present application is provided with a sealing structure on the shell, the sealing structure is used in cooperation with the driving structure, the sealing structure is provided to ensure the overall sealing performance of the switch, avoids the problem of dust entering the switch to cause poor contact, and avoids the problem of easy falling off of the sealing ring at the connection between the button and the shell.

[0017] (3) The electric tool switch with redundant contact provided by the present application is provided with a control structure in the shell, the control structure is provided to realize switching between a switch mode and a rotating speed adjustment mode, and the rotating speed of the electric tool is adjusted by pressing the button, and the flexibility is high. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in combination with the drawings and examples.

[0019] Figure 1 The overall structure schematic diagram provided by the present application is shown in the figure. Figure 2 The connection structure schematic diagram of the shell and the clamping seat of the present application is shown in the figure. Figure 3 The connection structure schematic diagram of the top cover and the second protrusion of the present application is shown in the figure. Figure 4 The connection structure diagram of the base and the positioning sleeve of the application; Figure 5 The connection structure diagram of the base and the positioning sleeve of the application; Figure 6 The connection structure diagram of the push rod and the first switching piece of the application; Figure 7 The connection structure diagram of the shell and the second terminal piece of the application; Figure 8 The connection structure diagram of the shell and the second terminal piece of the application; Figure 7 The enlarged structure diagram of A part shown in the figure; Figure 9 The connection structure diagram of the shell and the top cover of the application; Figure 10 The connection structure diagram of the shell and the second terminal piece of the application; Figure 9 The enlarged structure diagram of B part shown in the figure; Figure 11 The connection structure diagram of the push rod and the button of the application; Figure 12 The connection structure diagram of the push rod and the button of the application; Figure 11 The enlarged structure diagram of C part shown in the figure; Figure 13 The connection structure diagram of the shell and the card block of the application; Figure 14 The connection structure diagram of the card seat and the first switching piece of the application.

[0020] In the figure: 1, shell; 2, mounting structure; 201, card seat; 202, first protrusion; 203, first card slot; 204, card cover; 3, control structure; 301, main plate; 302, first wire; 303, conversion gear; 304, switching piece; 4, sealing structure; 401, top cover; 402, second protrusion; 403, second card slot; 404, base; 405, top seat; 406, connecting cover; 5, driving structure; 501, push rod; 502, stop block; 503, button; 504, rubber sleeve; 505, positioning sleeve; 6, triggering structure; 601, first switching piece; 602, protruding point; 603, tension spring; 604, first terminal piece; 605, second terminal piece; 606, second switching piece; 607, main contact point; 608, spring; 609, third switching piece; 610, auxiliary contact point; 611, contact piece; 612, copper mold; 613, second wire. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, purposes and effects of the application easy to understand, the application will be further described below in combination with specific embodiments.

[0022] As Figure 2 ,Figure 4 、 Figure 5 、 Figure 7 and Figures 9-14 The redundant contact electric tool switch provided by the application comprises a shell 1, a mounting structure 2 mounted on the shell 1, a sealing structure 4 connected to the shell 1, a driving structure 5 arranged on the sealing structure 4, and a trigger structure 6 arranged on the mounting structure 2. The mounting structure 2 comprises a clamping seat 201, the bottom of the shell 1 is clamped with the clamping seat 201, a clamping cover 204 is clamped on the clamping seat 201, the clamping cover 204 is arranged to facilitate subsequent mounting of a main board 301 and a first wire 302, two first protrusions 202 are fixedly connected to the clamping seat 201, two first clamping grooves 203 are arranged on the bottom of the shell 1, the clamping seat 201 is clamped with the two first clamping grooves 203 through the two fixed first protrusions 202 on the sides of the clamping seat 201, the preliminary fixing of the clamping seat 201 and the shell 1 is realized, the first protrusions 202 and the adjacent first clamping grooves 203 are clamped with each other, then the clamping cover 204 is clamped on the clamping seat 201, and the internal components of the clamping seat 201 are protected.

[0023] Specifically, as Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 9 and Figures 1-14As shown, the trigger structure 6 includes a first switching piece 601 and two protrusions 602 fixedly connected to the first switching piece 601. The first switching piece 601 is slidably connected to the card holder 201. The end of the first switching piece 601 is slidably connected to the housing 1. A tension spring 603 is fixedly connected between the first switching piece 601 and the card holder 201. A first terminal piece 604 and a second terminal piece 605 are respectively engaged between the card holder 201 and the housing 1. The first switching piece 601 is slidably connected to the first terminal piece 604. A second switching piece 606 and a third switching piece 609 are slidably connected to both sides of the second terminal piece 605. Both the second switching piece 606 and the third switching piece 609 are slidably connected to the card holder 201. The first terminal piece 604 is in the shape of an "L". The switch has a "T" shaped structure, with the second terminal piece 605 in a "T" shape and the second switching piece 606 and the third switching piece 609 both in a "U" shape. Springs 608 are fixedly connected to the ends of the second and third switching pieces 606 and 609, respectively. A main contact 607 and an auxiliary contact 610 are fixedly connected to the other ends of the second and third switching pieces 606 and 609, respectively. The main contact 607 abuts against the adjacent protrusion 602. After assembling the entire switch, it is installed in the designated position on the power tool. During use, to start the power tool and adjust the speed, press button 503, which moves the push rod 501 along the sliding channel of the positioning sleeve 505, rubber sleeve 504, and other components into the housing 1. When the push rod 501 is activated, it pushes the first switching plate 601, causing the first switching plate 601 to slide between the card holder 201 and the housing 1. At this time, the tension spring 603 fixed between the first switching plate 601 and the card holder 201 is stretched and stored. During the sliding process, one side of the first switching plate 601 maintains sliding contact with the first terminal piece 604, ensuring that the first switching plate 601 and the first terminal piece 604 always remain in a conductive state. At the same time, one of the protrusions 602 on the first switching plate 601 first abuts against the main contact 607 at the end of the second switching plate 606. The semi-circular protrusion 602 and the inner wall of the "V"-shaped main contact 607 always maintain double-point contact, resulting in good contact effect. At this time, the current flows through the first terminal piece 604, the first switching plate 601, the protrusion 602, and the main contact. The signal is transmitted to the power tool motor via point 607, the second terminal piece 605, and the second wire 613 fixed on the second terminal piece 605, thus starting the motor. The protruding part of the protrusion 602 has a semi-circular structure. The cross-section of both the main contact 607 and the auxiliary contact 610 has a "V" shape. The other end of the first switching piece 601 is fixedly connected to two contact pieces 611. The side of the contact piece 611 is provided with a copper mold 612. The second wire 613 is fixedly connected to both the first terminal piece 604 and the second terminal piece 605. During this process, the first switching piece 601 drives the two contact pieces 611 to move on the first set of copper molds 612 on the main board 301. When it is necessary to adjust the speed, simply continue pressing. Through the contact of the contact piece 611 with different positions on the copper mold 612,By changing the circuit resistance, and thus adjusting the motor input current and voltage, the motor speed can be controlled.

[0024] Specifically, such as Figures 1-11 and Figure 13 As shown, the sealing structure 4 includes a top cover 401 and two second protrusions 402 fixedly connected to the top cover 401. The top cover 401 is engaged with the top of the housing 1. Two second slots 403 are provided on the housing 1. The second protrusions 402 engage with the adjacent second slots 403. A base 404 is fixedly connected to the housing 1. A top seat 405 is fixedly connected to the top cover 401 near the base 404. The base 404 and the top seat 405 abut against each other. Then, the top cover 401 is engaged with the two second protrusions 402 fixed at its bottom and the two second slots 403 at the top of the housing 1, so that the top cover 401 covers the top opening of the housing 1. Then, the housing 1 is closed. The base 404 fixed on the outer wall is aligned and abuts against the top seat 405 fixed on the top cover 401. The connecting cover 406 is fitted onto the outside of the base 404 and the top seat 405. The base 404 and the top seat 405 are fastened by threaded connection. At this time, the tight connection between the shell 1 and the top cover 401 is completed, which is strong. The connecting cover 406 is threaded between the base 404 and the top seat 405. During this process, a rubber sleeve 504 is inserted into the gap between the base 404 and the top seat 405. The setting of the rubber sleeve 504 ensures the sealing of the inside of the shell 1 and prevents dust from entering the internal cavity of the shell 1. At the same time, since the outer side of the rubber sleeve 504 abuts against the inner wall of the connecting cover 406, it is not easy to fall off.

[0025] Specifically, such as Figure 1 and Figures 5-12As shown, the drive structure 5 includes a push rod 501. The push rod 501 is slidably connected between the housing 1 and the card holder 201. The end of the push rod 501 abuts against the first switching piece 601. A rubber sleeve 504 is engaged between the base 404 and the top seat 405. The rubber sleeve 504 abuts against the connecting cover 406. A positioning sleeve 505 is fixedly connected to the base 404. The push rod 501 is slidably connected between the base 404 and the positioning sleeve 505. The push rod 501 is slidably connected to the rubber sleeve 504. The push rod 501 is slidably connected to both the top seat 405 and the connecting cover 406. A button 503 is fixedly connected to the outer end of the push rod 501. A stop block 502 is fixedly connected to the inner section of the push rod 501. The stop block 502 is slidably connected to the top cover 401. After the installation of the trigger component is completed, the push rod 501 needs to be installed. The push rod 501 is inserted into the center of the connecting cover 406 and the rubber sleeve 504 in sequence until the inner end of the push rod 501 abuts against the first switching piece 601. At the same time, it is ensured that the stop block 502 fixed on the inner section of the push rod 501 slides and adapts to the inner wall of the top cover 401. At this time, the push rod 501 rests between the card seat 201 and the base 404. Then, the positioning sleeve 505 is snapped on the base 404. The installation of the positioning sleeve 505 realizes the initial positioning of the push rod 501. Finally, the button 503 is fixed on the outer end of the push rod 501 to complete the assembly of the internal drive component of the switch.

[0026] Specifically, such as Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 9 and Figures 11-13As shown, a control structure 3 is installed on the card slot 201. The control structure 3 includes a main board 301 and multiple first wires 302 fixedly connected to the bottom of the main board 301. The main board 301 is engaged with the card slot 201, with both sides of the main board 301 abutting against the housing 1. The first wires 302 abut against the card cover 204 and are engaged with the side wall of the housing 1. A shift stop 303 is engaged with the card slot 201, with both sides of the shift stop 303 abutting against the main board 301 and the housing 1 respectively. A rotating plate 304 is rotatably connected to the housing 1 near the shift stop 303. The rotating plate 304 engages with the corresponding groove on the shift stop 303, engaging the main board 301 within the card slot 201 and ensuring that both sides of the main board 301 are in tight contact with the inner wall of the housing 1. Then, the shift stop 303 is engaged with the card slot 201. On the 01, one side of the switch plate 301 is pressed against the main board 301, and the other side is attached to the inner wall of the housing 1. The rotating plate 304 on the housing 1 is rotated so that the rotating plate 304 is inserted into the corresponding groove on the shift switch 303, thus completing the positioning of the shift switch 303. At the same time, the multiple first wires 302 at the bottom of the main board 301 are inserted into the slots on the side wall of the housing 1 so that their ends press against the cover 204. At this time, the installation of the main board 301 and the shift switch 303 is completed. Two sets of copper molds 612 are fixedly connected to the side of the main board 301 near the first switching plate 601. The copper molds 612 are slidably connected to the adjacent contact plates 611. In subsequent use, by rotating the rotating plate 304, the contact state with the circuit of the main board 301 is changed, thereby changing the direction of the motor magnetic field, thus realizing the forward and reverse rotation of the power tool, which is highly flexible.

[0027] In use, the card holder 201 is engaged with the two first slots 203 at the bottom of the housing 1 via the first protrusions 202 fixed on both sides, achieving initial fixation between the card holder 201 and the housing 1. Screws are then tightened for secure fixation. Next, the card cover 204 is engaged with the card holder 201, protecting the internal components and facilitating subsequent installation of the motherboard 301 and the first wire 302. The motherboard 301 is then engaged within the card holder 201, ensuring tight contact between both sides of the motherboard 301 and the inner wall of the housing 1. Finally, the shift switch 303 is engaged with the card holder 201, with one side contacting the motherboard 301 and the other side against the inner wall of the housing 1. The housing is then rotated... The rotating plate 304 on body 1 is inserted into the corresponding groove on the shift switch 303 to complete the positioning of the shift switch 303. At the same time, the multiple first wires 302 at the bottom of the main board 301 are inserted into the slots on the side wall of the housing 1 so that their ends abut against the cover 204. At this time, the installation of the main board 301 and the shift switch 303 is completed. In subsequent use, by rotating the rotating plate 304, the contact state with the circuit of the main board 301 is changed, thereby changing the direction of the motor magnetic field, so as to realize the forward and reverse rotation of the power tool, which is highly flexible. Then, the first terminal piece 604 and the second terminal piece 605 are respectively engaged in the designated positions on the card holder 201. Then, other trigger components can be connected as required. After the installation of the trigger component is completed, the push rod 501 needs to be installed. The push rod 501 is inserted into the center of the connecting cover 406 and the rubber sleeve 504 in sequence until the inner end of the push rod 501 abuts against the first switching piece 601. At the same time, it is ensured that the stop block 502 fixed on the inner section of the push rod 501 slides and adapts to the inner wall of the top cover 401. At this time, the push rod 501 rests between the card seat 201 and the base 404. Then, the positioning sleeve 505 is snapped on the base 404. The installation of the positioning sleeve 505 realizes the initial positioning of the push rod 501. Finally, the button 503 is fixed on the outer end of the push rod 501 to complete the assembly of the internal drive component of the switch. Next, the top cover 401 is engaged with the two second protrusions 402 fixed at its bottom and the two second slots 403 on the top of the housing 1, so that the top cover 401 covers the top opening of the housing 1. Then, the base 404 fixed on the outer wall of the housing 1 is aligned and abutted with the top seat 405 fixed on the top cover 401. The connecting cover 406 is put on the outside of the base 404 and the top seat 405, and the base 404 and the top seat 405 are fastened by the threaded connection. At this time, the housing 1 and the top cover 401 are fastened together, which is very strong. During this process, a rubber sleeve 504 is inserted into the gap between the base 404 and the top seat 405. The rubber sleeve 504 ensures the sealing of the inside of the housing 1 and prevents dust from entering the internal cavity of the housing 1. At the same time, since the outer side of the rubber sleeve 504 abuts against the inner wall of the connecting cover 406, it is not easy to fall off. After assembling the switch, install it in the designated position on the power tool. During use, to start the power tool and adjust the speed, press button 503. This moves push rod 501 along the sliding channel of components such as positioning sleeve 505 and rubber sleeve 504 into the housing 1. The end of push rod 501 pushes the first switching piece 601, causing it to slide between the card holder 201 and the housing 1. At this time, the tension spring 603 fixed between the first switching piece 601 and the card holder 201 is stretched and stores force. During the sliding process, one side of the first switching piece 601 maintains sliding contact with the first terminal piece 604, ensuring that the first switching piece 601 and the first terminal piece 604 remain in a conductive state. Simultaneously, one of the protrusions on the first switching piece 601... 602 first contacts the main contact 607 at the end of the second switching piece 606. The semi-circular protrusion 602 and the inner wall of the "V"-shaped main contact 607 always maintain double-point contact, resulting in good contact effect. At this time, the current passes through the first terminal piece 604, the first switching piece 601, the protrusion 602, the main contact 607, and the second terminal piece 605, and then through the second wire 613 fixed on the second terminal piece 605 to the power tool motor, realizing the motor start-up. During this process, the first switching piece 601 drives the two contact pieces 611 to move on the first set of copper molds 612 on the main board 301. When it is necessary to adjust the speed, just continue to press. By contacting the contact pieces 611 with different positions on the copper molds 612, the circuit resistance is changed, thereby adjusting the motor input current and voltage to realize speed adjustment. If the main contact 607 experiences poor contact due to wear or other reasons, continue pressing button 503 to further push the push rod 501 to slide the first switching plate 601. At this time, the first switching plate 601 pushes the second switching plate 606 to slide on the second terminal piece 605, compressing the spring 608 fixed between the end of the second switching plate 606 and the housing 1, until another protrusion 602 on the first switching plate 601 abuts against the "V"-shaped auxiliary contact 610 at the end of the third switching plate 609, compressing the spring 608 fixed between the end of the third switching plate 609 and the housing 1. At this time, a redundant conductive path is formed to ensure stable current transmission and prevent the tool from stopping. Since the main board 301 is equipped with two sets of identical copper molds 612, when the protrusion 602 and the auxiliary contact 610 are connected, continuing to press button 503 can make the contact piece 611 slide on the other set of copper molds 612, thereby ensuring that the speed can still be adjusted even if the main contact 607 is damaged.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power tool switch with redundant contacts, comprising a housing (1), characterized in that: The mounting structure (2) is mounted on the housing (1), the sealing structure (4) is connected to the housing (1), the driving structure (5) is provided on the sealing structure (4), and the triggering structure (6) is provided on the mounting structure (2). The mounting structure (2) includes a card holder (201), which is engaged with the bottom of the housing (1). The triggering structure (6) includes a first switching piece (601) and two protrusions (602) fixedly connected to the first switching piece (601). The first switching piece (601) is slidably connected to the card holder (201). The end of the first switching piece (601) is slidably connected to the housing (1). A tension spring (603) is fixedly connected between the first switching piece (601) and the card holder (201). A first terminal piece (604) and a second terminal piece (605) are respectively engaged between the card holder (201) and the housing (1). The first switching piece (601) and the first terminal piece (604) are slidably connected. The two sides of the second terminal piece (605) are respectively... A second switching plate (606) and a third switching plate (609) are slidably connected. Both the second switching plate (606) and the third switching plate (609) are slidably connected to the card holder (201). The ends of the second switching plate (606) and the third switching plate (609) are fixedly connected to the housing (1) with springs (608). The other ends of the second switching plate (606) and the third switching plate (609) are respectively fixedly connected to a main contact (607) and a secondary contact (610). The main contact (607) abuts against the adjacent protrusion (602). The driving structure (5) includes a push rod (501). The push rod (501) is slidably connected between the housing (1) and the card holder (201). The end of the push rod (501) abuts against the first switching plate (601).

2. The power tool switch with redundant contacts according to claim 1, characterized in that: Two contact pieces (611) are fixedly connected to the other end of the first switching piece (601), and a copper mold (612) is provided on the side of the contact piece (611).

3. The power tool switch with redundant contacts according to claim 1, characterized in that: The raised portion of the protrusion (602) has a semi-circular structure. The cross-sections of the main contact (607) and the auxiliary contact (610) are both "V" shaped. The first terminal piece (604) has an "L" shaped structure. The second terminal piece (605) has a "T" shaped structure. The second switching piece (606) and the third switching piece (609) are both "U" shaped. The first terminal piece (604) and the second terminal piece (605) are both fixedly connected with a second wire (613).

4. A power tool switch with redundant contacts according to claim 1, characterized in that: The card holder (201) is fitted with a card cover (204), and two first protrusions (202) are fixedly connected to the card holder (201). Two first card slots (203) are opened on the housing (1), and the first protrusions (202) and the adjacent first card slots (203) are engaged with each other.

5. A power tool switch with redundant contacts according to claim 4, characterized in that: The card holder (201) is equipped with a control structure (3), which includes a main board (301) and multiple first wires (302) fixedly connected to the bottom of the main board (301). The main board (301) is engaged on the card holder (201). Both sides of the main board (301) abut against the housing (1). The first wires (302) abut against the card cover (204) and are engaged with the side wall of the housing (1).

6. A power tool switch with redundant contacts according to claim 5, characterized in that: The card holder (201) is fitted with a shift stop (303). The two sides of the shift stop (303) abut against the main board (301) and the housing (1) respectively. A rotating piece (304) is rotatably connected to the housing (1) near the shift stop (303). The rotating piece (304) and the corresponding groove on the shift stop (303) are engaged with each other.

7. A power tool switch with redundant contacts according to claim 5, characterized in that: Two sets of copper molds (612) are fixedly connected to the side of the main board (301) near the first switching piece (601), and the copper molds (612) are slidably connected to the adjacent contact pieces (611).

8. A power tool switch with redundant contacts according to claim 6, characterized in that: The sealing structure (4) includes a top cover (401) and two second protrusions (402) fixedly connected to the top cover (401). The top cover (401) is engaged with the top of the housing (1). Two second slots (403) are opened on the housing (1). The second protrusions (402) are engaged with the adjacent second slots (403).

9. A power tool switch with redundant contacts according to claim 8, characterized in that: A base (404) is fixedly connected to the housing (1), and a top seat (405) is fixedly connected to the top cover (401) near the base (404). The base (404) and the top seat (405) abut against each other, and a connecting cover (406) is threadedly connected between the base (404) and the top seat (405).

10. A power tool switch with redundant contacts according to claim 9, characterized in that: A rubber sleeve (504) is engaged between the base (404) and the top seat (405). The rubber sleeve (504) abuts against the connecting cover (406). A positioning sleeve (505) is fixedly connected to the base (404). A push rod (501) is slidably connected between the base (404) and the positioning sleeve (505). The push rod (501) is slidably connected to the rubber sleeve (504). The push rod (501) is slidably connected to both the top seat (405) and the connecting cover (406). A button (503) is fixedly connected to the outer end of the push rod (501). A stop block (502) is fixedly connected to the inner section of the push rod (501). The stop block (502) is slidably connected to the top cover (401).

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