A fast break switch

Abstract

This invention discloses a fast-on / off switch, comprising a trigger and a base arranged sequentially from front to back. The trigger is movable back and forth relative to the base. The base has a movable groove inside, with a movable hole on the front side of the movable groove. A sliding block is provided in the movable groove, and a sliding rod passing through the movable hole is provided on the front side of the sliding block. The front end of the sliding rod is connected to the trigger. A mounting groove is provided below the movable groove, containing a first metal foot, a second metal foot, and a movable bracket arranged sequentially from back to front. Two movable hardware feet are rotatably mounted on the second metal foot, distributed left and right. Under spring drive, the two movable hardware feet can complete the closing or opening of the contacts in a very short time, achieving "fast on / off," effectively reducing arc generation, and improving the switch's current withstand capability and service life.

Description

Technical Field

[0001] This invention relates to the field of power tool control technology, and in particular to a fast on / off switch. Background Technology

[0002] Currently, most power tool trigger switches on the market use a mechanical contact structure. The contact plates cannot switch on and off quickly, and the switching speed is usually proportional to the pressing speed. This type of structure performs stably in low-to-medium power applications, but in high-power power tools, it is prone to problems such as arc erosion, high contact resistance, and severe overheating, leading to short switch life, poor reliability, and even safety hazards.

[0003] Especially in applications requiring rapid switching, traditional switches suffer from slow mechanical action and are prone to arcing during contact separation and closure, further exacerbating contact wear and affecting switch stability and lifespan. Therefore, there is an urgent need for a trigger switch structure that can achieve rapid switching, withstand high current, has a compact structure, and offers high reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a fast on / off switch to solve the technical problem that in situations requiring rapid on / off switching, traditional switches have slow mechanical action speeds, are prone to arcing during contact separation and closure, further aggravating contact wear and affecting the stability and service life of the switch.

[0005] To achieve the above objectives, the present invention provides a quick-connect switch, comprising a trigger and a base body arranged sequentially from front to back. The trigger is movable back and forth relative to the base body. The base body has a movable groove inside, and a movable hole is provided on the front side of the movable groove. A sliding block is provided in the movable groove, and a sliding rod passing through the movable hole is provided on the front side of the sliding block. The front end of the sliding rod is connected to the trigger. A mounting groove is provided below the movable groove, and a first metal foot, a second metal foot, and a movable bracket are arranged sequentially from back to front in the mounting groove. The second metal foot has rotatably mounted components distributed along its left and right sides. Two movable metal feet are provided. The first metal foot is disengaged from the rear ends of the two movable metal feet. Two elastic driving members are rotatably arranged in the middle of the movable bracket, distributed along the left and right sides. The two elastic driving members are respectively rotatably engaged with the front ends of the two movable metal feet. The lower side of the sliding block is provided with a pressing end, and the rear side of the sliding block is provided with a return spring. The pressing end presses down on the top of the movable bracket, and the bottom of the movable bracket is provided with a compression spring. When the sliding block moves backward, the pressing end disengages backward from the top of the movable bracket, and the rear ends of the two movable metal feet come into contact with the first metal foot.

[0006] Furthermore, the top of the second metal foot is provided with three arc-shaped plates distributed along the left and right sides, the inner surfaces of the three arc-shaped plates facing forward, and the two movable metal feet are spaced apart between the three arc-shaped plates. The left and right sides of the movable metal feet are respectively provided with rotating parts, and the rotating parts are rotatably engaged with the inner surfaces of the arc-shaped plates.

[0007] Furthermore, the bottoms of the first metal foot and the second metal foot extend outside the base body, and the tops of the first metal foot and the second metal foot are located inside the base body. The first metal foot is in the shape of an inverted L-shaped plate, and the rear ends of the two movable metal feet are located between the horizontal and vertical sections of the first metal foot.

[0008] Furthermore, the elastic drive component includes two rotating bodies, which are coaxially arranged. Each of the two rotating bodies has a plug on its opposite side. Several plugs of the two rotating bodies are spaced apart. The two rotating bodies can move closer to each other and further away from each other. Each of the two rotating bodies has a rotating groove on its opposite side. Several plugs are fitted inside the support spring.

[0009] Furthermore, the pressing end is located at the lower front end of the sliding block, the top of the second metal foot and the movable bracket are installed inside the limiting bracket, and a limiting plate is provided below the rear ends of the two movable metal feet, the limiting plate being fixed to the inner bottom surface of the mounting groove.

[0010] Furthermore, a circuit board is provided on the right or left side of the movable slot, and two starter springs are provided on the right or left side of the sliding block, which are distributed vertically, and the two starter springs slide in contact with the circuit board.

[0011] Furthermore, a swing groove is provided above the movable groove, and a shaft hole extending axially up and down is provided on the front side of the swing groove. The shaft hole is rotatably engaged with a rotating shaft extending axially up and down. A swing rear rod extending into the swing groove is provided at the lower rear end of the rotating shaft, and a swing front rod extending out of the base body is provided at the upper front end of the rotating shaft.

[0012] Furthermore, the swing groove has a movable block inside, and a forward / reverse switching spring is provided on the right or left side of the movable block. The forward / reverse switching spring slides in contact with the circuit board. The top of the movable block has a vertical hole, and a ball that can move up and down elastically is provided at the top of the vertical hole. The inner top surface of the swing groove has several gear slots distributed along the front and back. The ball engages with the gear slots. The rear end of the swing rod can push the movable block to move back and forth.

[0013] Furthermore, the movable block is provided with a guide groove that slopes from left to right and forward, the guide groove runs vertically through the movable block, the guide groove is located in front of the ball, and the rear end of the swing rod is provided with an upwardly extending guide post, the guide post being inserted upward into the guide groove.

[0014] Furthermore, the trigger and the sliding block are respectively provided with intermediate stops at their tops, and the left and right sides of the intermediate stops are respectively provided with sliding grooves extending forward and backward. The front end of the swing front rod is provided with a downwardly extending front positioning rod, and the rear end of the swing rear rod is provided with a downwardly extending rear positioning rod. The front positioning rod cooperates with the intermediate stops and the sliding grooves on the trigger, and the rear positioning rod cooperates with the intermediate stops and the sliding grooves on the sliding block.

[0015] In summary, the technical solution of this invention has the following beneficial effects: The structure of this invention is rationally designed. By arranging a trigger and a base body sequentially from front to back, the trigger can move back and forth relative to the base body. The base body has an internal movable groove with a movable hole at its front. A sliding block is located within the movable groove, and a sliding rod passing through the movable hole is located at the front of the sliding block. The front end of the sliding rod is connected to the trigger. Below the movable groove is a mounting groove containing a first metal foot, a second metal foot, and a movable bracket arranged sequentially from back to front. Two movable hardware feet distributed left and right are rotatably mounted on the second metal foot. The first metal foot is detached from the rear ends of the two movable hardware feet. The movable bracket... Two elastic drive members, distributed left and right, are rotatably mounted in the center of the slide block. Each drive member rotatably engages with the front ends of two movable metal feet. A pressing end is located on the lower side of the slide block, and a return spring is located on the rear side. The pressing end presses down on the top of the movable bracket, and a compression spring is located at the bottom of the movable bracket. When the slide block moves backward, the pressing end disengages from the top of the movable bracket, and the rear ends of the two movable metal feet contact the first metal foot. Therefore, when the trigger is not pressed: because the return spring continuously supports the slide block forward, the pressing end presses down on the top of the movable bracket, and the movable bracket presses down on the top of the compression spring, disengaging the rear ends of the two movable metal feet from the first metal foot. When the trigger is pressed: the trigger pushes the slide block backward, the return spring is compressed, the pressing end disengages from the top of the movable bracket, the compression spring pushes the movable bracket upward, and the two elastic drive members drive the two movable metal feet to swing, causing the rear ends of the two movable metal feet to contact the first metal foot. As can be seen from the above analysis, under the drive of the spring, the two movable metal feet of the present invention can complete the closing or separation of the contacts in a very short time, realize "rapid switching", effectively reduce the generation of electric arc, and improve the current resistance and service life of the switch. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention when the right side wall of the base body is removed; Figure 3 This is a three-dimensional structural diagram of the present invention when the circuit board is removed; Figure 4 This is a three-dimensional structural diagram of the present invention when the left side wall of the base body is removed; Figure 5 yes Figure 4 Enlarged view of the active support area; Figure 6 This is a three-dimensional structural diagram of the present invention when the base body is removed; Figure 7 This is a three-dimensional structural diagram of the first metal foot of the present invention when it is engaged with the movable hardware foot. Explanation of reference numerals in the attached figures: Trigger (1), base body (2), sliding block (3), first metal foot (4), second metal foot (5), movable bracket (6), movable hardware foot (7), rotating shaft (8), movable block (9); limit bracket (10), circuit board (11), starting spring (12), forward and reverse switching spring (13), ball (14), slide groove (15), intermediate stop block (16).

[0017] Movable groove (201), movable hole (202), mounting groove (203), limiting plate (204), swing groove (205), shaft hole (206), gear groove (207); sliding rod (301), pressing end (302), return spring (303); arc plate (501); elastic drive component (601), compression spring (602), rotating body (603), insert block (604), rotating groove (605), support spring (606); rotating part (701); swing rear rod (801), swing front rod (802), guide post (803), front positioning rod (804), rear positioning rod (805); guide groove (901), vertical hole (902). Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, but this does not constitute a limitation on the scope of protection of the present invention.

[0019] In this invention, for clarity, the following description is provided: The observer faces the attached... Figure 1In this observation, the left side of the observer is designated as rear, the right side as front, the front of the observer as left, the rear of the observer as right, the top of the observer as upper, and the bottom of the observer as lower. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the invention and do not indicate or imply that the structures or components referred to must have a specific orientation or be constructed in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0020] See Figures 1 to 7 This embodiment provides a quick-connect switch, including a trigger 1 and a base 2 arranged sequentially from front to back. The trigger 1 can move back and forth relative to the base 2. The base 2 has a movable groove 201 inside, and a movable hole 202 on the front side of the movable groove 201. A sliding block 3 is provided in the movable groove 201, and a sliding rod 301 passing through the movable hole 202 is provided on the front side of the sliding block 3. The front end of the sliding rod 301 is connected to the trigger 1. A mounting groove 203 is provided below the movable groove 201. A first metal foot 4, a second metal foot 5, and a movable bracket 6 are arranged sequentially from back to front in the mounting groove 203. The second metal foot 5 is rotatably provided with a bracket distributed along the left and right sides. Two movable metal feet 7, with the first metal foot 4 disengaged from the rear ends of the two movable metal feet 7. Two elastic drive members 601, distributed left and right, are rotatably mounted in the middle of the movable bracket 6. The two elastic drive members 601 rotatably engage with the front ends of the two movable metal feet 7 respectively. A pressing end 302 is provided on the lower side of the sliding block 3, and a return spring 303 is provided on the rear side of the sliding block 3. The pressing end 302 presses down on the top of the movable bracket 6, and a compression spring 602 is provided at the bottom of the movable bracket 6. When the sliding block 3 moves backward, the pressing end 302 disengages from the top of the movable bracket 6, and the rear ends of the two movable metal feet 7 contact the first metal foot 4. Function: When the trigger is not pressed: because the return spring continuously supports the sliding block forward, the pressing end presses down on the top of the movable bracket, and the movable bracket presses down on the top of the compression spring, causing the rear ends of the two movable metal feet to disengage from the first metal foot. When the trigger is pressed: the trigger pushes the sliding block backward, the return spring is compressed, the pressing end disengages from the top of the movable bracket, the compressed spring pushes the movable bracket upward, and the two elastic drive components drive the two movable metal feet to swing, so that the rear ends of the two movable metal feet make contact with the first metal foot. From the above analysis, it can be seen that, driven by the spring, the two movable metal feet of this invention can complete the closing or opening of the contacts in a very short time, achieving "rapid switching," effectively reducing arc generation, and improving the current withstand capability and service life of the switch.

[0021] Specifically, the top of the second metal foot 5 is provided with three arc-shaped plates 501 distributed from left to right, with the inner surfaces of the three arc-shaped plates 501 facing forward. Two movable metal feet 7 are spaced apart between the three arc-shaped plates 501. Rotating parts 701 are provided on the left and right sides of the movable metal feet 7, and the rotating parts 701 are rotatably engaged with the inner surfaces of the arc-shaped plates 501. Function: The rotating parts 701 and the inner surfaces of the arc-shaped plates 501 form a rotation fulcrum, allowing the two movable metal feet 7 to swing smoothly up and down on the top of the second metal foot 5.

[0022] Specifically, the bottoms of the first metal foot 4 and the second metal foot 5 extend outside the base body 2, while the tops of the first metal foot 4 and the second metal foot 5 are located inside the base body 2. The first metal foot 4 is shaped like an inverted L-shaped plate, and the rear ends of the two movable metal feet 7 are located between the horizontal and vertical sections of the first metal foot 4. Function: Driven by a spring, the front ends of the two movable metal feet 7 swing downwards, and the rear ends of the two movable metal feet 7 swing upwards, allowing the rear ends of the two movable metal feet 7 to close or separate from the horizontal section of the first metal foot 4 in a very short time, achieving "rapid switching". Preferably, the rear ends of the two movable metal feet 7 are each provided with a moving contact, and the horizontal section of the first metal foot 4 is provided with two stationary contacts. The two moving contacts can respectively cooperate with the two stationary contacts to conduct electricity. The moving contacts are made of silver alloy or other highly conductive, arc-resistant materials, and are arranged in a plug-in or butt-joint manner with the stationary contacts. Simultaneously, an arc-extinguishing grid can be set around the contacts to effectively divide the arc, further protect the contacts, and extend the switch life. Therefore, it achieves rapid switching, significantly reduces arc erosion of contacts, and is suitable for high-current, high-power power tools; at the same time, it improves the durability and reliability of the switch and extends its service life.

[0023] Specifically, the elastic drive component 601 includes two rotating bodies 603, which are coaxially arranged. Each rotating body 603 has a plug 604 on its opposite side, and several plugs 604 are spaced apart. The two rotating bodies 603 can move closer to each other and further apart. Each rotating body 603 has a rotating groove 605 on its opposite side. The plugs 604 are fitted inside a support spring 606. Function: As the movable bracket moves upward, when the elastic drive component 601 is pressed to a certain position, the support spring 606 stores energy and reaches a critical point, then rapidly releases the energy, pushing the two movable hardware feet 7 to move quickly.

[0024] Specifically, the pressing end 302 is located at the lower front end of the sliding block 3, the top of the second metal foot 5 and the movable bracket 6 are installed inside the limiting bracket 10, and a limiting plate 204 is provided below the rear ends of the two movable metal feet 7. The limiting plate 204 is fixed to the inner bottom surface of the mounting groove 203. Function: The limiting bracket 10 can provide a limiting function, making the movement of the movable bracket 6 smoother, and the limiting plate 204 can also limit the downward swing amplitude of the rear ends of the two movable metal feet 7.

[0025] Specifically, a circuit board 11 is provided on the right or left side of the movable slot 201, and two actuating springs 12 distributed vertically are provided on the right or left side of the sliding block 3. The two actuating springs 12 slide in contact with the circuit board 11. Function: When the trigger moves back and forth relative to the base, the trigger can sequentially drive the sliding rod and the sliding block to move back and forth synchronously. When the sliding block moves back and forth, the actuating springs will form a back-and-forth sliding contact with the side of the circuit board 11, so that the circuit board 11 can control the speed of the function according to the degree of back-and-forth sliding of the actuating springs (for example, the further the actuating springs slide backward, the faster the control speed is, and the further the actuating springs slide forward, the slower the control speed is, until the speed is reduced to zero). Through the above structure, this switch not only has the speed regulation and switching functions of a traditional trigger, but also exhibits excellent fast switching capability and durability under high current conditions.

[0026] Specifically, a swing groove 205 is provided above the movable groove 201. A shaft hole 206 extending axially vertically is provided on the front side of the swing groove 205. The shaft hole 206 is rotatably engaged with a rotating shaft 8 extending axially vertically. A swing rear rod 801 extending into the swing groove 205 is provided at the lower rear end of the rotating shaft 8, and a swing front rod 802 extending out of the base body 2 is provided at the upper front end of the rotating shaft 8. Function: By setting the swing front rod and swing rear rod 801, not only can forward and reverse rotation be switched, but the forward and backward movement of the trigger and sliding block 3 can also be restricted.

[0027] Specifically, the swing groove 205 has a movable block 9 inside, and a forward / reverse switching spring 13 is provided on the right or left side of the movable block 9. The forward / reverse switching spring 13 slides in contact with the circuit board 11. The top of the movable block 9 has a vertical hole 902, and the top of the vertical hole 902 is provided with a ball bearing 14 that can move up and down elastically. The inner top surface of the swing groove 205 has several gear slots 207 distributed along the front and back. The ball bearing 14 is engaged with the gear slots 207. The rear end of the swing rod 801 can push the movable block 9 to move back and forth. Function: When the front swing lever swings left and right, it drives the rotating shaft to rotate, which in turn drives the rear swing lever to swing left and right. The rear swing lever's left and right swing pushes the movable block 9 to move back and forth, causing the ball bearings 14 on the movable block 9 to shift gears in several gear slots 207. This achieves forward / reverse switching, with the spring 13 sliding against the circuit board 11. The circuit board 11 can then control the forward / reverse switching based on the degree of sliding of the spring bearing (e.g., when the rear swing lever swings to the right, it controls forward rotation; when it swings to the left, it controls reverse rotation). Preferably, a spring can be installed inside the vertical hole 902 to allow the ball bearings 14 to move elastically up and down.

[0028] Specifically, the movable block 9 is provided with a guide groove 901 that slopes from left to right and forward. The guide groove 901 runs vertically through the movable block 9 and is located in front of the ball bearing 14. The rear end of the swing rod 801 is provided with an upwardly extending guide post 803, which inserts upward into the guide groove 901. Function: The inclined guide groove 901 cooperates with the swing guide post 803 to drive the movable block 9 to move back and forth.

[0029] Specifically, the top of the trigger 1 and the sliding block 3 are respectively provided with intermediate stop blocks 16, and the left and right sides of the intermediate stop blocks 16 are respectively provided with sliding grooves 15 extending forward and backward. The front end of the swing front rod 802 is provided with a downward extending front positioning rod 804, and the rear end of the swing rear rod 801 is provided with a downward extending rear positioning rod 805. The front positioning rod 804 cooperates with the intermediate stop blocks 16 and sliding grooves 15 on the trigger 1, and the rear positioning rod 805 cooperates with the intermediate stop blocks 16 and sliding grooves 15 on the sliding block 3. Functions: Case 1: When the front positioning rod 804 of the swing front rod 802 swings to the left to the left slide groove 15 (at this time, it is set to forward rotation), the rear positioning rod 805 of the swing rear rod 801 swings to the right to the right slide groove 15 accordingly, and the movable block 9 moves backward; Case 2: When the front positioning rod 804 of the swing front rod 802 swings to the right to the right slide groove 15 (at this time, it is set to reverse rotation), the rear positioning rod 805 of the swing rear rod 801 swings to the left to the left slide groove 15 accordingly, and the movable block 9 moves forward; Case 3: When the front positioning rod 804 and the rear positioning rod 805 are respectively located at the rear end of the two intermediate stops 16 (at this time, it is set to stop operation), even if the trigger 1 attempts to move back and forth relative to the base body 2, the trigger 1 cannot be pulled, that is, the pressing operation stops.

[0030] Preferably, the base body 2 is a switch housing with a sealed structure, which isolates the contact area from the outside to prevent dust and moisture from entering, ensuring stable operation even in harsh environments.

[0031] In summary, this invention provides a fast-acting on / off switch suitable for high-current applications. Its core feature lies in the use of a rapidly actuating spring-driven contact mechanism, enabling rapid contact separation and closure, effectively reducing arcing, and improving the switch's current withstand capability and service life. It has a compact structure, is easy to install in various power tools, possesses excellent dust and water resistance, adapts to harsh working environments, and is compatible with speed regulation, normally open / normally closed, and other functions, making it widely applicable.

[0032] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A quick-connect switch, comprising a trigger (1) and a base (2) arranged sequentially from front to back, characterized in that: The trigger (1) can move back and forth relative to the base body (2). The base body (2) has a movable groove (201) inside. The movable groove (201) has a movable hole (202) on the front side. The movable groove (201) has a sliding block (3). The sliding block (3) has a sliding rod (301) passing through the movable hole (202) on the front side. The front end of the sliding rod (301) is connected to the trigger (1). The movable groove (201) has a mounting groove (203) below it. The mounting groove (203) has a first metal foot (4), a second metal foot (5), and a movable bracket (6) arranged sequentially from back to front. The second metal foot (5) has two movable hardware feet (7) distributed along the left and right sides. The first metal foot (4) The movable bracket (6) is rotatably provided with two elastic drive members (601) distributed along the left and right sides in the middle part of the movable bracket (6), and the two elastic drive members (601) are respectively rotatably engaged with the front ends of the two movable metal feet (7). The lower side of the sliding block (3) is provided with a pressing end (302), and the rear side of the sliding block (3) is provided with a return spring (303). The pressing end (302) presses down on the top of the movable bracket (6), and the bottom of the movable bracket (6) is provided with a compression spring (602). When the sliding block (3) moves backward, the pressing end (302) moves backward away from the top of the movable bracket (6), and the rear ends of the two movable metal feet (7) form contact with the first metal foot (4).

2. The fast on / off switch according to claim 1, characterized in that: The top of the second metal foot (5) is provided with three arc-shaped plates (501) distributed along the left and right sides. The inner surfaces of the three arc-shaped plates (501) face forward. Two movable metal feet (7) are spaced apart between the three arc-shaped plates (501). Rotating parts (701) are provided on the left and right sides of the movable metal feet (7). The rotating parts (701) are rotatably engaged with the inner surfaces of the arc-shaped plates (501).

3. The fast on / off switch according to claim 2, characterized in that: The bottoms of the first metal foot (4) and the second metal foot (5) extend to the outside of the base body (2), and the tops of the first metal foot (4) and the second metal foot (5) are located inside the base body (2). The first metal foot (4) is in the shape of an inverted L-shaped plate, and the rear ends of the two movable metal feet (7) are located between the horizontal and vertical sections of the first metal foot (4).

4. The fast on / off switch according to claim 2, characterized in that: The elastic drive component (601) includes two rotating bodies (603), which are coaxially arranged. Each of the two rotating bodies (603) has a plug (604) on its opposite side. Several plugs (604) of the two rotating bodies (603) are spaced apart. The two rotating bodies (603) can move closer to each other and further away from each other. Each of the two rotating bodies (603) has a rotating groove (605) on its opposite side. Several plugs (604) are fitted inside the support spring (606).

5. A fast on / off switch according to claim 2, characterized in that: The pressing end (302) is located at the lower front end of the sliding block (3), the top of the second metal foot (5) and the movable bracket (6) are installed inside the limiting bracket (10), and a limiting plate (204) is provided below the rear end of the two movable metal feet (7), and the limiting plate (204) is fixed to the inner bottom surface of the mounting groove (203).

6. A fast-on / off switch according to any one of claims 1 to 5, characterized in that: The right or left side of the active slot (201) is provided with a circuit board (11), and the right or left side of the sliding block (3) is provided with two starting springs (12) distributed vertically. The two starting springs (12) slide in contact with the circuit board (11).

7. A fast on / off switch according to claim 6, characterized in that: The movable groove (201) is provided with a swing groove (205) above it. The swing groove (205) is provided with a shaft hole (206) extending vertically in the axial direction on the front side. The shaft hole (206) is rotatably engaged with a rotating shaft (8) extending vertically in the axial direction. The lower rear end of the rotating shaft (8) is provided with a swing rear rod (801) extending into the swing groove (205). The upper front end of the rotating shaft (8) is provided with a swing front rod (802) extending out of the base body (2).

8. A fast on / off switch according to claim 7, characterized in that: The swing groove (205) is provided with a movable block (9) inside. The right or left side of the movable block (9) is provided with a forward / reverse switching spring (13). The forward / reverse switching spring (13) slides in contact with the circuit board (11). The top of the movable block (9) is provided with a vertical hole (902). The top of the vertical hole (902) is provided with a ball (14) that can move up and down elastically. The inner top surface of the swing groove (205) is provided with a number of gear slots (207) distributed along the front and back. The ball (14) is engaged with the gear slot (207). The rear end of the swing rod (801) can push the movable block (9) to move back and forth.

9. A fast on / off switch according to claim 8, characterized in that: The movable block (9) is provided with a guide groove (901) that slopes forward from left to right. The guide groove (901) runs through the movable block (9) vertically. The guide groove (901) is located in front of the ball (14). The rear end of the swing rod (801) is provided with an upwardly extending guide post (803). The guide post (803) is inserted upward into the guide groove (901).

10. A fast-on / off switch according to claim 9, characterized in that: The trigger (1) and the sliding block (3) are respectively provided with intermediate stops (16) at their tops. The left and right sides of the intermediate stops (16) are respectively provided with sliding grooves (15) extending forward and backward. The front end of the swing front rod (802) is provided with a downwardly extending front positioning rod (804). The rear end of the swing rear rod (801) is provided with a downwardly extending rear positioning rod (805). The front positioning rod (804) cooperates with the intermediate stops (16) and the sliding grooves (15) on the trigger (1). The rear positioning rod (805) cooperates with the intermediate stops (16) and the sliding grooves (15) on the sliding block (3).

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