CN219979374U

CN219979374U - Dustproof waterproof brushless DC trigger switch

Info

Publication number: CN219979374U
Application number: CN202321099237.0U
Authority: CN
Inventors: 倪圣珑; 朱寿富; 薛垒垒
Original assignee: Zhejiang Jiaben Electronics Co ltd
Current assignee: Zhejiang Jiaben Electronics Co ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-11-07
Anticipated expiration: 2033-05-05

Abstract

The utility model provides a dustproof and waterproof brushless direct current trigger switch, which comprises a base body, a middle seat and a pushing shaft, wherein one end of the pushing shaft is arranged in a box body formed by the base body and the middle seat, the other end of the pushing shaft extends out of the box body, and a protecting sleeve is arranged at the part of the pushing shaft extending out of the box body; a circuit board assembly is arranged above the push shaft, a moving contact support supporting the moving contact, a static contact pin matched with the moving contact and a connecting spring plate are arranged below the push shaft, an isolation block is arranged on the moving contact support, one end of the connecting spring plate is connected with the moving contact, and the other end of the connecting spring plate is connected with the isolation block arranged on the moving contact support; the movable contact support is provided with a support protrusion, the static contact pin is provided with a static contact pin protrusion, the movable contact support is connected with the circuit board assembly through the support protrusion, and the static contact pin is connected with the circuit board assembly through the static contact pin protrusion.

Description

Dustproof waterproof brushless DC trigger switch

Technical Field

The present disclosure relates to a dust-proof and waterproof brushless DC trigger switch.

Background

1. The conventional brushless direct current trigger switch is not provided with a magnet, and can only be used for a direct current electric tool with relatively low voltage and small current, for example, when the direct current electric tool is used in a process of exceeding 42Vd.c or the current exceeds 25A, arc ablation contacts are easily generated, the contacts are adhered when serious, the electric tool cannot be closed and other defects exist, serious potential safety hazards exist, and the national safety standard is not met.

2. The conventional brushless direct current trigger switch only has a single internal sealing ring and has a common dustproof function, when the switch is used in a severe dust environment or outdoor operation, dust and water are easy to enter, so that the switch function is invalid, the service life of the electric tool is greatly reduced, the current direct current electric tool is often in an overhead operation condition, if the switch function is invalid, the electric tool function is invalid, serious potential safety hazards exist for personal safety, and the national safety standard is not met.

Therefore, it is imperative to design a brushless DC trigger switch which has a good dustproof effect and even has a waterproof function and can be used on DC brushless electric tools with voltages exceeding 42 Vd.c.

Disclosure of Invention

The aim of the present disclosure is to overcome the deficiencies of the prior art and provide a dust-proof and waterproof brushless DC trigger switch.

The present disclosure provides a dustproof and waterproof brushless direct current trigger switch, its technical scheme is:

the trigger switch comprises a base body, a middle seat and a pushing shaft, one end of the pushing shaft is arranged in a box body formed by the base body and the middle seat, the other end of the pushing shaft extends out of the box body, and a protecting sleeve is arranged on the part, extending out of the box body, of the pushing shaft;

a circuit board assembly is arranged above the push shaft, a moving contact support supporting the moving contact, a static contact pin matched with the moving contact and a connecting spring plate are arranged below the push shaft, an isolation block is arranged on the moving contact support, one end of the connecting spring plate is connected with the moving contact, and the other end of the connecting spring plate is connected with the isolation block arranged on the moving contact support;

the movable contact support is provided with a support protrusion, the static contact pin is provided with a static contact pin protrusion, the movable contact support is connected with the circuit board assembly through the support protrusion, and the static contact pin is connected with the circuit board assembly through the static contact pin protrusion.

In one embodiment, a small cover is arranged above the pushing shaft, the small cover is connected with the base body, the circuit board assembly is arranged on the small cover, and the small cover is provided with a small cover first through hole and a small cover second through hole;

the support protrusion penetrates through the first through hole of the small cover to be connected with the circuit board assembly, and the static contact pin protrusion penetrates through the second through hole of the small cover to be connected with the circuit board assembly.

In one embodiment, a push shaft protection sheet is arranged below the push shaft;

the utility model discloses a push away axle protection piece, including push away axle bottom, push away axle bottom is provided with push away axle fixture block, be provided with on the push away axle fixture block and push away axle joint hole, the both ends of push away the axle protection piece all are provided with the protection piece and buckle, a side of push away the axle protection piece is provided with the protection piece fixture block, two the protection piece buckle respectively prop up in push away the both sides of axle fixture block, the protection piece fixture block joint in push away in the axle joint hole.

In one embodiment, a terminal clamping block is arranged at the position where the movable contact support and the static contact pin are arranged on the base body, a terminal first clamping groove and a terminal second clamping groove are arranged on the terminal clamping block, the terminal of the movable contact support is arranged in the terminal first clamping groove, and the terminal of the static contact pin is arranged in the terminal second clamping groove;

after the terminals of the static contact pins and the terminals of the movable contact support are respectively connected with the wires, epoxy resin or protective glue is filled in the first clamping groove of the terminals and the second clamping groove of the terminals.

In one embodiment, the small cover is further provided with a small cover first clamping hole and a small cover second clamping hole;

the top of the pushing shaft is provided with a pushing shaft first groove and a pushing shaft second groove, a first sliding sheet is arranged in the pushing shaft first groove, and a second sliding sheet is arranged in the pushing shaft second groove;

the first pushing shaft groove is arranged in the first clamping hole of the small cover so that the first sliding sheet extends out of the small cover and can slide on the bottom surface of the circuit board assembly; the pushing shaft second groove is arranged in the small cover second clamping hole, so that the second sliding sheet extends out of the small cover and can slide on the bottom surface of the circuit board assembly.

In one embodiment, the switch further comprises a commutation structure;

the reversing structure comprises a reversing turntable, a reversing driving plate which is arranged above the reversing turntable and matched with the reversing turntable, and a reversing reed which is arranged below the reversing turntable and matched with the reversing turntable;

the reversing turntable is driven by the reversing driving plate to rotate, and the reversing reed is driven by the reversing turntable to rotate on the top surface of the circuit board assembly.

In one embodiment, an upper cover is arranged above the middle seat, an upper cover through hole is formed in the upper cover, the reversing driving plate extends out of the upper cover through hole, and the reversing turntable is arranged in the upper cover through hole;

the side surface of the reversing turntable is provided with a turntable through hole, a marble spring is arranged in the turntable through hole, and marble springs are arranged at two ends of each marble spring; two upper cover grooves are formed in the side wall of the upper cover through hole, and the two marble can jump in the two upper cover grooves respectively.

In one embodiment, a reversing deflector rod is arranged above the reversing dial plate;

one end of the reversing deflector rod is provided with a deflector rod connecting hole, and the top of the reversing deflector plate is provided with a deflector plate connecting column matched with the deflector rod connecting hole; the top surface of the other end of the reversing deflector rod is provided with a handle, the bottom surface of the other end of the reversing deflector rod is provided with a locking block, and the middle seat is provided with a locking groove matched with the locking block;

the reversing deflector rod is characterized in that a deflector rod through hole is further formed in the reversing deflector rod, an upper cover boss is arranged on the upper cover, the reversing deflector rod is sleeved on the upper cover boss through the deflector rod through hole, an upper cover connecting hole is formed in the upper cover boss, and a fastener is movably connected with the reversing deflector rod through the upper cover connecting hole.

In one embodiment, a plurality of middle seat connecting strips are arranged at the top of the middle seat, middle seat wedge-shaped blocks are arranged at the end parts of each middle seat connecting strip, a plurality of upper cover clamping holes are formed in the upper cover, upper cover clamping strips are arranged in each upper cover clamping hole, and when the middle seat connecting strips are inserted into the upper cover clamping holes, the middle seat wedge-shaped blocks are just propped against the upper cover clamping strips; the upper cover clamping holes are respectively corresponding to the middle seat connecting strips in number and position;

two dial connecting strips are arranged at the bottom of the reversing dial, dial wedge blocks are arranged at the end parts of each dial connecting strip, two dial clamping holes are formed in the reversing dial, dial clamping strips are arranged in each dial clamping hole, and when the dial connecting strips are inserted into the dial clamping holes, the dial wedge blocks are just propped against the dial clamping strips; the bottom of the reversing driving plate is provided with a driving plate connecting hole, and the top of the reversing rotating plate is provided with a rotating plate top connecting column matched with the driving plate connecting hole;

the bottom of the reversing turntable is provided with a plurality of turntable bottom connecting posts, and the reversing reed is provided with reed connecting holes matched with the turntable bottom connecting posts.

In one embodiment, the base body is provided with a base body step semicircular hole, the middle seat is provided with a middle seat step semicircular hole, the base body step semicircular hole and the middle seat step semicircular hole form a step circular hole, a sealing ring is arranged in the step circular hole, and a protective sleeve is sleeved outside the step circular hole to realize double protection of the pushing shaft part.

The base body is provided with a plurality of base body wedge blocks, and the middle seat is provided with a middle seat clamping hole matched with the base body wedge blocks;

the device comprises a box body, a base body, a push shaft, a trigger, a push shaft hole, a positioning column and a reset spring, wherein the push shaft extends out of the box body;

the base body is provided with a magnet corresponding to the position of the static contact pin.

The implementation of the present disclosure includes the following technical effects:

1. the utility model discloses a novel brushless direct current trigger switch through setting up the little lid in pushing away the axle top to make little lid and base body coupling, so that little lid can push away the axle, thereby make to push away the axle and hardly have and shake from top to bottom or back, and then make the in-process that operates the switch push away the distance between axle and the circuit board subassembly and all be fixed, thereby can prolong the life of carbon film and golden finger on the circuit board subassembly greatly, make the switch durable.

2. The utility model discloses a novel brushless direct current trigger switch, push away shaft portion position have dual protection, and terminal part has set up the fixture block, and the dustproof and waterproof at terminal position can be realized to the encapsulating after the wire is welded.

3. The utility model discloses a novel structure, low in cost uses and maintains the repair simply, but the wide application is used in various brushless direct current hand-held type electric tool, is applicable to various brushless direct current hand-held type electric tool, like: the brushless DC electric drill, the brushless DC electric hammer, the brushless DC electric wrench, the brushless DC impact screwdriver and the like accord with national safety standards.

Drawings

Fig. 1 is a perspective view of a dust and water proof brushless dc trigger switch of the present disclosure, without a reversing function.

Fig. 2 is a perspective view of the dust and water proof brushless dc trigger switch of the present disclosure having a reversing function.

Fig. 3 is a perspective view of the dust and water resistant brushless dc trigger switch of the present disclosure having a reversing function with a reversing lever.

Fig. 4 is an exploded view of the dust-and-water-proof brushless dc trigger switch of fig. 3.

Fig. 5 is an assembled schematic view of the switch push shaft assembly of fig. 3.

Fig. 6 is an assembled schematic view of the switch commutation assembly of fig. 3.

Fig. 7 is an assembled schematic view of the switch body portion of fig. 3.

Fig. 8 is an assembled schematic view of the switch terminal clamping block portion of fig. 3.

Fig. 9 is a schematic diagram of the internal wiring of the switch of fig. 3 with commutation in a different position.

Fig. 10 is a schematic diagram of the internal functional configuration of the switch trigger of fig. 3 before and after depression.

FIG. 11 is a schematic assembly view of the switch trigger and reversing dial of FIG. 3.

Fig. 12 is a schematic structural view of the push shaft assembly and the switch-on structure of fig. 3.

In the figure, a 1-base body, a 2-middle seat, a 3-push shaft, a 4-protective sleeve, a 5-circuit board assembly, a 6-movable contact, a 7-movable contact support, an 8-static contact pin, a 9-connecting spring piece, a 10-isolation block, a 11-small cover, a 12-push shaft protection piece, a 13-terminal clamping block, a 14-first sliding sheet, a 15-second sliding sheet, a 16-reversing turntable, a 17-reversing driving plate, a 18-reversing reed, a 19-upper cover, a 20-spring, a 21-spring, a 22-reversing driving rod, a 23-fastener, a 24-sealing ring, a 25-trigger, a 26-positioning column, a 27-reset spring, a 28-magnet, a 31-push shaft clamping block, a 32-push shaft clamping hole, a 33-push shaft first groove, a 34-push shaft second groove, 35-pushing shaft hole, 61-moving contact, 62-contact mounting groove, 63-contact mounting hole, 71-bracket projection, 72-bracket mounting hole, 73-bracket mounting block, 74-bracket mounting groove, 81-stationary contact, 82-stationary contact foot projection, 91-connecting spring piece first bending, 92-connecting spring piece second bending, 1001-isolation block mounting groove, 1002-isolation block wedge block, 1003-isolation block mounting hole, 111-small cover first through hole, 112-small cover second through hole, 113-small cover first clamping hole, 114-small cover second clamping hole, 115-small cover connecting post, 116-small cover clamping strip, 121-protection sheet bending, 122-protection sheet clamping block, 131-terminal first clamping groove, 132-terminal second clamping groove, 161-turntable through hole, 162-turntable clamping hole, 163-turntable top connecting column, 164-turntable bottom connecting column, 171-turntable connecting column, 172-turntable connecting bar, 173-turntable wedge block, 174-turntable connecting hole, 181-reed connecting hole, 191-upper cover through hole, 192-upper cover groove, 193-upper cover boss, 194-upper cover connecting hole, 195-upper cover clamping hole, 196-upper cover clamping bar, 221-deflector connecting hole, 222-handle, 223-locking block, 224-deflector rod through hole, 101-base body step semicircle hole, 102-base body wedge block, 103-base body first clamping groove, 104-base body second clamping groove, 105-base body third clamping groove, 106-base body connecting hole, 107-base body clamping groove, 201-locking groove, 202-middle seat connecting bar, 203-middle seat wedge block, 204-middle seat semicircle hole, 205-middle seat step semicircle hole.

Detailed Description

The present disclosure will be described in detail below with reference to the embodiments and the accompanying drawings, and it should be noted that the described embodiments are only intended to facilitate understanding of the present disclosure, and are not meant to be limiting. The orientation of the present utility model is described above, below, left and right by referring to the drawings, and is not limited to the protection scope.

As shown in fig. 1-12, the dustproof and waterproof brushless dc trigger switch provided in this embodiment includes a base body 1, a middle seat 2, and a push shaft 3, where one end of the push shaft 3 is disposed in a box body formed by the base body 1 and the middle seat 2, the other end extends out of the box body, and a protecting sleeve 4 is disposed on a portion of the push shaft 3 extending out of the box body; a circuit board assembly 5 is arranged above the push shaft 3, a moving contact 6, a moving contact support 7 supporting the moving contact 6, a static contact pin 8 matched with the moving contact 6 and a connecting spring plate 9 are arranged below the push shaft 3, an isolation block 10 is arranged on the moving contact support 7, one end of the connecting spring plate 9 is connected with the moving contact 6, and the other end of the connecting spring plate 9 is connected with the isolation block 10 arranged on the moving contact support 7; wherein, the movable contact 6 is provided with a movable contact 61, and the static contact 8 is provided with a static contact 81;

the movable contact support 7 is provided with a support protrusion 71, the static contact leg 8 is provided with a static contact leg protrusion 82, the movable contact support 7 is connected with the circuit board assembly 5 through the support protrusion 71, and the static contact leg 8 is connected with the circuit board assembly 5 through the static contact leg protrusion 82.

Specifically, as shown in the figure, one end of the moving contact support 7 is provided with a support mounting hole 72, the other end is provided with a support mounting block 73, the support mounting block 73 is provided with a support mounting groove 74, two sides of the middle part of the moving contact 6 are provided with contact mounting grooves 62, and the moving contact 6 is arranged on the moving contact support 7 through the cooperation of the contact mounting grooves 62 and the support mounting grooves 74; the isolation block 10 is provided with an isolation block mounting groove 1001, the isolation block mounting groove 1001 is provided with an isolation block wedge 1002, and the isolation block 10 is arranged on the movable contact support 7 through the cooperation of the isolation block wedge 1002 and the support mounting hole 72; still be provided with contact mounting hole 63 on the moving contact 6, still be provided with the spacer mounting hole 1003 on the spacer 10, the one end of connecting shell fragment 9 sets up and connects shell fragment first buckling 91, and the other end is provided with and connects shell fragment second buckling 92, connect shell fragment first buckling 91 pass contact mounting hole 63 and joint in on the contact mounting hole 63, connect shell fragment second buckling 92 pass earlier the spacer mounting hole 1003 later pass spacer mounting groove 1001 and joint in on the spacer wedge 1002.

It should be noted that, in this embodiment, the moving contact support 7 is welded to the circuit board assembly 5 through the support protrusion 71, and the static contact pin 8 is welded to the circuit board assembly 5 through the static contact pin protrusion 82, and it can be understood that the circuit board assembly 5 is provided with a first welding hole welded to the support protrusion 71 and a second welding hole welded to the static contact pin protrusion 82, respectively.

In this embodiment, the isolation block 10 is disposed on the moving contact support 7, and one end of the connection spring 9 connected to the moving contact support 7 is connected to the moving contact support 7 through the isolation block 10, so as to press the moving contact 61 disposed on the moving contact 6, so that the moving contact 6 can be reset downward, and when the push shaft 3 is pressed, the moving contact 61 and the stationary contact 81 can be connected. In addition, the structure of the present disclosure is novel, the cost is low, the use, maintenance and repair are simple, the present disclosure can be widely used for various brushless DC hand-held electric tools, and the present disclosure is applicable to various brushless DC hand-held electric tools, such as: the brushless DC electric drill, the brushless DC electric hammer, the brushless DC electric wrench, the brushless DC impact screwdriver and the like accord with national safety standards.

As shown in fig. 4, a small cover 11 is disposed above the pushing shaft 3, the small cover 11 is connected with the base body 1, the circuit board assembly 5 is disposed on the small cover 11, and a small cover first through hole 111 and a small cover second through hole 112 are disposed on the small cover 11; the bracket protrusion 71 passes through the small cover first through hole 111 to be connected with the circuit board assembly 5, and the static contact pin protrusion 82 passes through the small cover second through hole 112 to be connected with the circuit board assembly 5.

In this embodiment, through setting up the little lid 11 in pushing away axle 3 top to make little lid 11 be connected with base body 1, so that little lid 11 can push away axle 3, thereby make pushing away axle 3 have about or rock around, and then the in-process that makes the operation switch pushes away the distance between axle 3 and the circuit board subassembly 5 all be fixed, thereby can prolong the life of carbon film and golden finger on the circuit board subassembly 5 greatly, make the switch durable, and set up lag 4 through the position that extends out the box on pushing away axle 3, in order to realize pushing away the protection at axle position.

As shown in fig. 4, a push shaft protecting piece 12 is arranged below the push shaft 3; the bottom of the pushing shaft 3 is provided with a pushing shaft clamping block 31, the pushing shaft clamping block 31 is provided with a pushing shaft clamping hole 32, both ends of the pushing shaft protecting piece 12 are provided with protecting piece bending 121, one side surface of the pushing shaft protecting piece 12 is provided with protecting piece clamping blocks 122, the two protecting piece bending 121 respectively prop against both sides of the pushing shaft clamping block 31, and the protecting piece clamping blocks 122 are clamped in the pushing shaft clamping hole 32.

In this embodiment, through setting up the push shaft protection piece 12 in push shaft 3 below to set up push shaft fixture block 31 in push shaft 3 bottom, and set up push shaft joint hole 32 on push shaft fixture block 31, all set up the buckling at push shaft protection piece 12's both ends simultaneously, set up protection piece fixture block 122 in push shaft protection piece 12's a side, so that two buckling respectively prop up in push shaft fixture block 31's both sides, protection piece fixture block 122 joint is in push shaft joint hole 32, in order to realize push shaft protection piece 12's installation and location, this push shaft protection piece 12 just can wrap up push shaft fixture block 31 simultaneously, thereby can protect push shaft 3 and be difficult to be melted when moving contact 6 takes place the high temperature.

As shown in fig. 4, a terminal clamping block 13 is disposed at a position on the base body 1 where the moving contact support 7 and the static contact pin 8 are disposed, a terminal first clamping groove 131 and a terminal second clamping groove 132 are disposed on the terminal clamping block 13, a terminal of the moving contact support 7 is disposed in the terminal first clamping groove 131, and a terminal of the static contact pin 8 is disposed in the terminal second clamping groove 132; after the terminals of the static contact pins 8 and the terminals of the moving contact support 7 are respectively connected with the wires, epoxy resin or protective glue is filled in the first clamping groove 131 and the second clamping groove 132 of the terminals.

Because the moving contact support 7 and the static contact leg 8 are exposed in the air after passing through the base body 1, in this embodiment, the positions of the moving contact support 7 and the static contact leg 8 on the base body 1 are provided with the terminal clamping block 13, and meanwhile, the terminal clamping block 13 is provided with the terminal first clamping groove 131 and the terminal second clamping groove 132, so that the terminal of the moving contact support 7 is arranged in the terminal first clamping groove 131, the terminal of the static contact leg 8 is arranged in the terminal second clamping groove 132, and when in use, after the terminal of the static contact leg 8 and the terminal of the moving contact support 7 are respectively connected with a wire, epoxy resin or protective glue is only required to be filled in the terminal first clamping groove 131 and the terminal second clamping groove 132, so as to realize dust prevention and water prevention of the terminal part of the switch.

In one implementation manner, as shown in fig. 4, the small cover 11 is further provided with a small cover first clamping hole 113 and a small cover second clamping hole 114; the top of the pushing shaft 3 is provided with a pushing shaft first groove 33 and a pushing shaft second groove 34, a first sliding sheet 14 is arranged in the pushing shaft first groove 33, and a second sliding sheet 15 is arranged in the pushing shaft second groove 34; the first pushing shaft groove 33 is disposed in the first clamping hole 113 of the small cover, so that the first sliding piece 14 extends out of the small cover 11 and can slide on the bottom surface of the circuit board assembly 5; the pushing shaft second groove 34 is disposed in the small cover second clamping hole 114, so that the second sliding piece 15 extends out of the small cover 11 and can slide on the bottom surface of the circuit board assembly 5.

In this embodiment, a first push shaft groove 33 and a second push shaft groove 34 are formed at the top of the push shaft 3, a first slide sheet 14 is disposed in the first push shaft groove 33, a second slide sheet 15 is disposed in the second push shaft groove 34, a first small cover clamping hole 113 and a second small cover clamping hole 114 are formed in the small cover 11, the first push shaft groove 33 is disposed in the first small cover clamping hole 113, so that the first slide sheet 14 can extend out of the small cover 11 and slide on the bottom surface of the circuit board assembly 5, and the second push shaft groove 34 is disposed in the second small cover clamping hole 114, so that the second slide sheet 15 extends out of the small cover 11 and can slide on the bottom surface of the circuit board assembly 5, and the switch in this embodiment has a potentiometer output function and is transmitted to a control board through a signal wire to realize the speed regulation function of an electric tool.

In another implementation, as shown in fig. 2 and 4, the switch further includes a reversing structure; the reversing structure comprises a reversing turntable 16, a reversing driving plate 17 arranged above the reversing turntable 16 and matched with the reversing turntable 16, and a reversing reed 18 arranged below the reversing turntable 16 and matched with the reversing turntable 16; the reversing turntable 16 is driven by the reversing driving plate 17 to rotate, and the reversing reed 18 is driven by the reversing turntable 16 to rotate on the top surface of the circuit board assembly 5.

In this embodiment, the reversing dial 17 is rotated to drive the reversing turntable 16 below the reversing dial 17 to rotate, so as to drive the reversing reed 18 below the reversing turntable 16 to rotate on the top surface of the circuit board assembly 5, thereby realizing the reversing function of the switch, and the reversing function of the electric tool is realized by transmitting the signal line to the control board.

As shown in fig. 4, an upper cover 19 is disposed above the middle seat 2, an upper cover through hole 191 is disposed on the upper cover 19, the reversing dial 17 extends out of the upper cover 19 through the upper cover through hole 191, and the reversing turntable 16 is disposed in the upper cover through hole 191; a turntable through hole 161 is formed in the side surface of the reversing turntable 16, a marble spring 20 is arranged in the turntable through hole 161, and marble 21 is arranged at two ends of the marble spring 20; two upper cover grooves 192 are formed in the side wall of the upper cover through hole 191, the two pins can jump in the two upper cover grooves 192 respectively, and the upper cover grooves 192 can be V-shaped grooves.

In the present embodiment, by providing the upper cover 19 above the middle seat 2 and providing the upper cover through hole 191 on the upper cover 19, so that the reversing dial 17 extends out of the upper cover 19 through the upper cover through hole 191, so as to facilitate the operation of the reversing dial 17, and simultaneously, the reversing turntable 16 is provided in the upper cover through hole 191, so as to reduce the volume of the switch; by arranging the rotary disc through hole 161 on the side surface of the reversing rotary disc 16 and arranging the ball springs 20 in the rotary disc through hole 161, the balls 21 are arranged at both ends of the ball springs 20, and meanwhile, two upper cover grooves 192 are arranged on the side wall of the upper cover through hole 191, so that the two balls 21 can respectively jump in the two upper cover grooves 192, and obvious reversing gear sense can be realized in the reversing process.

As shown in fig. 3, a reversing lever 22 is arranged above the reversing dial 17; a deflector rod connecting hole 221 is formed in one end of the reversing deflector rod 22, and a deflector plate connecting column 171 matched with the deflector rod connecting hole 221 is arranged at the top of the reversing deflector plate 17; the top surface of the other end of the reversing deflector rod 22 is provided with a handle 222, the bottom surface of the other end of the reversing deflector rod 22 is provided with a locking block 223, the middle seat 2 is provided with a locking groove 201 matched with the locking block 223, when the deflector rod 22 is shifted to the middle position, the locking block 223 is just in a straight line with the rib of the trigger 25, the trigger 25 cannot be normally pressed, and the disconnection locking function of the switch is realized; the reversing deflector 22 is further provided with a deflector through hole 224, the upper cover 19 is provided with an upper cover boss 193, the reversing deflector 22 is sleeved on the upper cover boss 193 through the deflector through hole 224, the upper cover boss 193 is provided with an upper cover connecting hole 194, the reversing deflector 22 is movably connected to the upper cover 19 through the upper cover connecting hole 194 by a fastener 23, and the fastener 23 can be a screw.

As shown in fig. 4, a plurality of middle seat connection bars 202 are provided at the top of the middle seat 2, a middle seat wedge block 203 is provided at the end of each middle seat connection bar 202, a plurality of upper cover clamping holes 195 are provided on the upper cover 19, an upper cover clamping bar 196 is provided in each upper cover clamping hole 195, and when the middle seat connection bars 202 are inserted into the upper cover clamping holes 195, the middle seat wedge block 203 is just propped against the upper cover clamping bars 196; wherein, the number and positions of the upper cover clamping holes 195 respectively correspond to the number and positions of the connecting strips 202 of the middle seat 2;

two dial connecting strips 172 are arranged at the bottom of the reversing dial 17, dial wedge-shaped blocks 173 are arranged at the end parts of each dial connecting strip 172, two dial clamping holes 162 are arranged on the reversing dial 16, dial clamping strips are arranged in each dial clamping hole 162, and when the dial connecting strips 172 are inserted into the dial clamping holes 162, the dial wedge-shaped blocks 173 just prop against the dial clamping strips; a dial connecting hole 174 is arranged at the bottom of the reversing dial 22, and a dial top connecting post 163 matched with the dial connecting hole 174 is arranged at the top of the reversing dial 16;

the bottom of the reversing turntable 16 is provided with a plurality of turntable bottom connecting posts 164, and the reversing reed 18 is provided with reed connecting holes 181 matched with the turntable bottom connecting posts 164.

As shown in fig. 4, the base body 1 is provided with a base body step semicircular hole 101, the middle seat 2 is provided with a middle seat step semicircular hole 204, the base body step semicircular hole 101 and the middle seat step semicircular hole 204 form a step circular hole, a sealing ring 24 is arranged in the step circular hole, a protecting sleeve 4 is sleeved on the outer side of the step circular hole, and the sealing ring 24 and the protecting sleeve 4 can realize the dustproof and waterproof function of a pushing shaft part, so that the double dustproof and waterproof functions of the switch in the embodiment can be realized.

The base body 1 is provided with a plurality of base body wedge blocks 102, the middle seat 2 is provided with a middle seat clamping hole 205 matched with the base body wedge blocks 102, and the base body 1 and the middle seat 2 are connected through the matching of the base body wedge blocks 102 and the middle seat clamping holes 205.

The push shaft 3 extends out one end of the box body is provided with a trigger 25, the push shaft 3 is arranged between one end in the box body and the base body 1, a push shaft hole 35 is arranged in the push shaft hole 35, a positioning column 26 is arranged in the push shaft hole 35, a reset spring 27 is arranged on the positioning column 26, the trigger 25 is convenient for a user to operate the switch in the embodiment, the positioning column 26 is used for installing the reset spring 27, and the reset spring 27 is used for resetting the switch.

The magnet 28 is arranged on the base body 1 at a position corresponding to the static contact pin 8, and the magnet 28 can prevent the switch in the embodiment from generating arc ablation contacts when being applied to an electric tool with voltage over 42V or current over 25A, thereby greatly prolonging the service life of the switch.

It should be noted that, in this embodiment, the base body 1 is further provided with a first base body clamping groove 103, a second base body clamping groove 104 and a third base body clamping groove 105, the terminal of the moving contact support 7 extends out of the base body 1 through the first base body clamping groove 103, the terminal of the stationary contact pin 8 extends out of the base body 1 through the second base body clamping groove 104, and the magnet 28 is disposed in the third base body clamping groove 105; the small cover 11 is provided with a small cover connecting column 115 and a small cover clamping strip 116, the base body is provided with a base body connecting hole 106 matched with the small cover connecting column, and the base body is provided with a base body clamping groove 107 matched with the small cover clamping strip 116.

The present disclosure provides a dustproof and waterproof brushless direct current trigger switch, its working process is as follows:

when the trigger 25 is pressed, the push shaft 3 moves rightward under the drive of the trigger 25, the push shaft 3 is gradually separated from the tail part on the push contact 6, under the action of the connecting spring piece 9, the push contact 6 rotates clockwise by taking the bracket mounting groove 74 on the push contact bracket 7 as a fulcrum, and after the push contact 61 on the push contact 6 contacts with the fixed contact 81 on the fixed contact pin 8, the switch-on function of the switch is realized, at the moment, the circuit board assembly 5 is provided with current switch-on, the switch-on function of the switch is realized, and the control board is electrified through the connecting wire.

When the trigger 25 is continuously pressed, the pushing shaft 3 is driven to slide rightwards continuously, the first slide plate 14 and the second slide plate 15 arranged above the pushing shaft 3 are driven to slide rightwards on the bottom surface of the circuit board assembly 5, the first slide plate 14 and the second slide plate 15 slide rightwards on the resistor strip of the circuit board assembly 5, the output resistor on the circuit board assembly 5 is gradually reduced, and the output resistor is output to the control board through the signal wire, so that the electronic speed regulation boosting function of the electric tool is realized.

When the trigger 25 is loosened, the push shaft 3 is reset gradually under the action of the reset spring 27, the push shaft 3 slides leftwards to drive the first slide plate 14 and the second slide plate 15 to slide leftwards, the first slide plate 14 and the second slide plate 15 slide leftwards on the resistor belt of the circuit board assembly 5, the output resistance on the circuit board assembly 5 is increased gradually, and the output resistance is output to the control board through the signal wire, so that the electronic speed regulation and voltage reduction function of the switch is realized; and finally, the pushing shaft 3 presses the tail part on the moving contact 6 to disconnect the switch, the circuit board assembly 5 is completely not electrified, the control board is also powered off, and the switch does not output, so that the disconnection function of the switch is realized.

When the reversing deflector 22 is shifted, the reversing deflector 22 drives the reversing driving plate 17 to rotate, and the reversing driving plate 17 drives the reversing turntable 16 arranged below the reversing driving plate 17 to rotate, so that the reversing reed 18 arranged below the reversing turntable 16 is driven to rotate on the top surface of the circuit board assembly 5, and the reversing function of the switch is realized.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present disclosure, and not for limiting the scope of the present disclosure, and although the present disclosure has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present disclosure without departing from the spirit and scope of the technical solutions of the present disclosure.

Claims

1. The dustproof and waterproof brushless direct current trigger switch is characterized by comprising a base body, a middle seat and a pushing shaft, wherein one end of the pushing shaft is arranged in a box body formed by the base body and the middle seat, the other end of the pushing shaft extends out of the box body, and a protecting sleeve is arranged at the part of the pushing shaft extending out of the box body;

2. A dust and water resistant brushless dc trigger switch as defined in claim 1, wherein: a small cover is arranged above the pushing shaft and connected with the base body, the circuit board assembly is arranged on the small cover, and a small cover first through hole and a small cover second through hole are formed in the small cover;

3. A dust and water resistant brushless dc trigger switch as defined in claim 1, wherein: a pushing shaft protection sheet is arranged below the pushing shaft;

4. A dust and water resistant brushless dc trigger switch as defined in claim 1, wherein: the base body is provided with a terminal clamping block at the positions of the movable contact support and the static contact pin, the terminal clamping block is provided with a terminal first clamping groove and a terminal second clamping groove, the terminal of the movable contact support is arranged in the terminal first clamping groove, and the terminal of the static contact pin is arranged in the terminal second clamping groove;

5. A dust and water resistant brushless dc trigger switch as defined in claim 2, wherein: the small cover is also provided with a small cover first clamping hole and a small cover second clamping hole;

6. A dust and water resistant brushless dc trigger switch as defined in claim 5, wherein: the switch further comprises a reversing structure;

7. A dust and water resistant brushless dc trigger switch as defined in claim 6, wherein: an upper cover is arranged above the middle seat, an upper cover through hole is formed in the upper cover, the reversing turntable extends out of the upper cover through hole, and the reversing turntable is arranged in the upper cover through hole;

8. A dust and water resistant brushless dc trigger switch as defined in claim 7, wherein: a reversing deflector rod is arranged above the reversing deflector plate;

9. A dust and water resistant brushless dc trigger switch as defined in claim 7, wherein: the top of the middle seat is provided with a plurality of middle seat connecting strips, the end part of each middle seat connecting strip is provided with a middle seat wedge block, the upper cover is provided with a plurality of upper cover clamping holes, each upper cover clamping hole is internally provided with an upper cover clamping strip, and when the middle seat connecting strips are inserted into the upper cover clamping holes, the middle seat wedge blocks are just propped against the upper cover clamping strips; the upper cover clamping holes are respectively corresponding to the middle seat connecting strips in number and position;

10. A dust-and-water-proof brushless dc trigger switch as defined in any one of claims 1 to 4, wherein: the base body is provided with a base body step semicircular hole, the middle seat is provided with a middle seat step semicircular hole, and a sealing ring is arranged in a step circular hole formed by the base body step semicircular hole and the middle seat step semicircular hole;

the push shaft extends out one end of the box body and is provided with a trigger, the push shaft is arranged between one end in the box body and the base body and is provided with a push shaft hole, a positioning column is arranged in the push shaft hole, and a reset spring is arranged on the positioning column.