CN217426611U

CN217426611U - Dustproof alternating current speed regulation switch

Info

Publication number: CN217426611U
Application number: CN202220993148.XU
Authority: CN
Inventors: 朱正伟; 范文永
Original assignee: Yongkang Chuanmu Electrical Appliance Co ltd
Current assignee: Yongkang Chuanmu Electrical Appliance Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-09-13
Anticipated expiration: 2032-04-24

Abstract

The utility model discloses a dustproof alternating current speed regulation switch, including casing, push shaft, first movable contact arm, second movable contact arm, movable contact arm support, trigger and switching-over subassembly, the switching-over subassembly includes switching-over box and switching-over driving lever, switching-over driving lever one end is arranged in inside the switching-over box, and the other end stretches out the trigger, set up dustproof cavity and the dustproof convex part joint cooperation of shield in the casing, set up first terminal and second terminal in the dustproof cavity, first terminal one side sets up a plurality of wiring preforming, and alternating current speed regulation switch is littleer, enables electric tool handle design more tiny, easily grasps and be difficult to take off one's hands; the trigger is provided with the limiting ribs, so that the stroke of the trigger is shortened to realize the function of speed limitation in the reverse rotation during the turnover, and the mechanical structure is more stable than electronic control.

Description

Dustproof alternating current speed regulation switch

Technical Field

The utility model belongs to the technical field of the switch and specifically relates to a dustproof interchange speed governing switch is related to.

Background

The alternating current speed regulation switch in the current market is large in size, so that the handle of the electric tool is thick in design, and the palm of Asian people is small, so that the electric tool is easy to fatigue when being gripped by hands; the existing AC trigger speed regulation switch is poor in dustproof performance, the service life of the switch is affected by the dustproof function of the switch, when dust enters the switch, internal short circuit is easily caused, fire disasters can be caused when the switch is serious, and personal and property safety is affected.

Disclosure of Invention

Not enough to prior art, the utility model provides a dustproof interchange speed governing switch.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a dustproof speed regulation switch that exchanges, includes the casing, pushes away axle, first movable contact arm, second movable contact arm, movable contact arm support, trigger and switching-over subassembly, the switching-over subassembly includes switching-over box and switching-over driving lever, switching-over driving lever one end is arranged in inside the switching-over box, the other end stretches out the trigger, set up dustproof cavity and the dustproof convex part joint cooperation of shield in the casing, set up first terminal and second terminal in the dustproof cavity, first terminal one side sets up a plurality of wiring preforming.

In the above technical solution, further, the push shaft contacts with a first movable contact arm and a second movable contact arm, one end of a movable contact arm support is connected with the first movable contact arm, the other end of the movable contact arm support is connected with the second movable contact arm, a first elastic component is arranged between the first movable contact arm and the movable contact arm support, the second movable contact arm is connected with the casing through a second elastic component, a second static contact piece is arranged on the second binding post, a circuit board is arranged on a side wall of the casing, and a cooling fin and the first static contact piece are arranged on the circuit board.

Among the above-mentioned technical scheme, furtherly still includes locking mechanical system, locking mechanical system includes lock axle, locking lever and lock button, set up the lock post on the casing, set up the mounting hole on the lock post, the lock axle passes the mounting hole reaches the locking lever, the lock post passes through lock button spring and is connected with the lock button, the lock axle is installed on the lock button, the locking lever other end sets up push away epaxially.

In the above technical solution, further, the push shaft is connected with the housing through a return spring, and a seal ring is arranged between the housing and the push shaft.

In the above technical scheme, further, a speed regulation contact piece is arranged on the push shaft, and the speed regulation contact piece slides on the carbon film on the circuit board so as to change the amount of the resistance connected to the circuit to control the rotating speed of the motor.

In the technical scheme, furthermore, a wiring pressing sheet is arranged on one side of the movable contact arm support.

In the above technical solution, further, the circuit board is provided with a thyristor.

The utility model discloses a beneficial effect is: 1. the AC speed-regulating switch of the utility model has smaller volume, so that the handle of the electric tool can be designed to be finer, and the AC speed-regulating switch is easy to grasp and is not easy to fall off; 2. the utility model discloses with the terminal setting in the dustproof cavity that casing and shield formed for the dust can not get into the switch inside, makes the switch safer.

Drawings

The device is further described with reference to the figures and examples.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the left side structure of the present invention.

Fig. 3 is a schematic structural view of another aspect of the present invention.

Fig. 4 is a schematic diagram of the internal structure of fig. 1 according to the present invention.

Fig. 5 is an exploded view of fig. 1 of the present invention.

In the figure, 1, a shell, 11, a dustproof cavity, 111, a first terminal, 112, a second terminal, 113, a wiring pressing sheet, 114, a second static contact, 12, a dustproof cover, 121, a dustproof convex part, 13, a lock column, 2, a push shaft, 21, a reset spring, 22, a sealing ring, 23, a speed regulation contact, 3, a first movable contact arm, 31, a first elastic part, 4, a second movable contact arm, 41, a second elastic part, 5, a movable contact arm bracket, 6, a trigger, 7, a reversing assembly, 71, a reversing box, 72, a reversing lever, 8, a circuit board, 81, a radiating fin, 82, a first static contact, 83, a carbon film, 84, a thyristor, 9, a locking mechanism, 91, a lock shaft, 92, a lock rod, 93, a lock button and 94, a lock button spring.

Detailed Description

Referring to fig. 1-5 and fig. 1-5, a dustproof ac speed-adjusting switch comprises a housing 1, a push shaft 2, a first movable contact arm 3, a second movable contact arm 4, a movable contact arm bracket 5, a trigger 6 and a reversing assembly 7, wherein the reversing assembly 7 comprises a reversing box 71 and a reversing deflector rod 72, one end of the reversing deflector rod 72 is arranged in the reversing box 71, the other end of the reversing deflector rod 72 extends out of the trigger 6, one end of the reversing deflector rod 72 is arranged in the reversing box 71, the other end of the reversing deflector rod extends out of the trigger 6, a dustproof cavity 11 is arranged in the housing 1 and is in clamping fit with a dustproof convex part 121 of a dustproof cover 12, a first binding post 111 and a second binding post 112 are arranged in the dustproof cavity 11, one side of the first binding post is provided with a plurality of wiring press sheets, the push shaft 2 is in contact with the first movable contact arm 3 and the second movable contact arm 4, one end of the movable contact arm bracket 5 is connected with the first movable contact arm 3, the other end is connected with a second movable contact arm 4, a first elastic component 31 is arranged between the first movable contact arm 3 and the movable contact arm bracket 5, the second movable contact arm 4 is connected with the shell 1 through a second elastic component 41, a second static contact piece 114 is arranged on the second wiring terminal 112, a circuit board 8 is arranged on the side wall of the shell 1, and a radiating fin 81 and a first static contact piece 82 are arranged on the circuit board 8.

In order to make trigger 65 can lock after pressing, still set up locking mechanical system 99, locking mechanical system 9 includes lock axle 91, locking lever 92 and lock button, set up lock post 13 on the casing 1, set up the mounting hole on the lock post 13, lock axle 91 passes the mounting hole reaches locking lever 92, lock post 13 is connected with lock button 93 through lock button spring 94, lock axle 91 is installed on the lock button 93, the setting of the locking lever 92 other end is in push away epaxial 2.

In order to enable the switch to realize the speed regulation function, the push shaft 2 is provided with a speed regulation contact piece 23, and the speed regulation contact piece 23 slides on the carbon film 83 on the circuit board 8, so that the rotating speed of the motor can be controlled by changing the resistance of the access circuit.

In order to enable the push shaft 2 to be automatically reset, the push shaft 2 is connected to the housing 1 via a return spring 21.

In order to prevent dust from entering the switch to cause short circuit, a sealing ring 22 is arranged between the shell 1 and the push shaft 2, a dustproof cavity 11 and a dustproof convex part 121 of a dustproof cover 12 are arranged in the shell 1 in a clamping fit mode, a first wiring terminal 111 and a second wiring terminal 112 are arranged in the dustproof cavity 11 of the dustproof plate, a plurality of wiring pressing sheets 113 are arranged on one side of the first wiring terminal 111, a wiring pressing sheet 113 is arranged on one side of the movable contact arm support 5, the cable can be clamped after the cable is inserted into the wiring pressing sheet 113, and more design requirements can be met through a plurality of ports.

In order to make the current and voltage output more stable, a thyristor 84 is arranged on the circuit board 8.

According to the design, the AC speed regulation switch of the utility model has smaller volume, so that the handle of the electric tool can be designed to be finer, and the electric tool is easy to grasp and not easy to fall off; the utility model discloses with the terminal setting in the dustproof cavity that casing and shield formed for the dust can not get into the switch inside, makes the switch safer.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and the modifications, equivalent variations or modifications made on the basis of the technical solution of the present invention all fall into the protection scope of the present invention.

Claims

1. The utility model provides a dustproof speed regulation switch that exchanges, its characterized in that, includes the casing, pushes away the axle, first movable contact arm, second movable contact arm, movable contact arm support, trigger and switching-over subassembly, the switching-over subassembly includes switching-over box and switching-over driving lever, switching-over driving lever one end is arranged in inside the switching-over box, the other end stretches out the trigger, set up dustproof cavity and the dustproof convex part joint cooperation of shield in the casing, set up first terminal and second terminal in the dustproof cavity, first terminal one side sets up a plurality of wiring preforming.

2. The dustproof alternating current speed regulation switch according to claim 1, wherein the push shaft is in contact with a first movable contact arm and a second movable contact arm, one end of a movable contact arm support is connected with the first movable contact arm, the other end of the movable contact arm support is connected with the second movable contact arm, a first elastic part is arranged between the first movable contact arm and the movable contact arm support, the second movable contact arm is connected with the shell through a second elastic part, a second static contact piece is arranged on the second binding post, a circuit board is arranged on the side wall of the shell, and a radiating fin and the first static contact piece are arranged on the circuit board.

3. The dustproof ac speed regulating switch according to claim 1, further comprising a locking mechanism, wherein the locking mechanism comprises a lock shaft, a lock rod and a lock knob, the housing is provided with a lock cylinder, the lock cylinder is provided with a mounting hole, the lock shaft passes through the mounting hole and the lock rod, the lock cylinder is connected with the lock knob through a lock knob spring, the lock shaft is mounted on the lock knob, and the other end of the lock rod is disposed on the push shaft.

4. The dustproof ac speed regulation switch of claim 1, wherein the push shaft is connected to the housing through a return spring.

5. The dustproof ac speed regulating switch according to claim 1, wherein a seal ring is disposed between the housing and the push shaft.

6. The dustproof ac speed-regulating switch according to claim 2, wherein the push shaft is provided with a speed-regulating contact, and the speed-regulating contact slides on the carbon film on the circuit board to change the resistance of the access circuit so as to control the rotation speed of the motor.

7. The dustproof ac speed control switch according to claim 2, wherein a wiring pressing piece is disposed on one side of the movable contact arm bracket.

8. The dustproof alternating current speed regulation switch of claim 2, wherein a silicon controlled rectifier is arranged on the circuit board.