CN206098247U

CN206098247U - Speed governing switch of short stroke

Info

Publication number: CN206098247U
Application number: CN201620949541.3U
Authority: CN
Inventors: 赖志明
Original assignee: DONGGUAN CHEN DA APPLIANCE Co Ltd
Current assignee: Defond Electech Co Ltd
Priority date: 2016-08-26
Filing date: 2016-08-26
Publication date: 2017-04-12
Anticipated expiration: 2026-08-26
Also published as: DE202017105010U1

Abstract

The utility model relates to a speed governing switch technology field especially relates to a speed governing switch of short stroke, a speed governing switch of short stroke, the on -line screen storage device comprises a base, the side of base is provided with the PCB board, the PCB board is provided with first contact piece, the upper end of PCB board is provided with the slip terminal, the upper end of base is provided with and pushes away handle and trigger, push away the front end and slip terminal fixed connection of handle, the rear end that pushes away the handle is articulated with the upper end of trigger, the trigger still is provided with the bracing piece, the one end and the base of bracing piece are connected, the other end of bracing piece is articulated with the trigger, the articulated department that uses trigger and bracing piece is a minute boundary point, divide boundary point to divide into power arm and resistance arm with the trigger, the length of power arm is greater than the length of resistance arm, the utility model discloses an utilize lever principle, the displacement of resistance arm is less than the displacement of power arm, guarantee the trigger when receiving the external force mistake and bump, slip terminal gliding distance on first contact piece is shorter relatively, changes incomparable to the rotational speed that changes the motor.

Description

A kind of speed-regulating switch of short stroke

Technical field

This utility model is related to speed-regulating switch technical field, more particularly to a kind of speed-regulating switch of short stroke.

Background technology

Speed-regulating switch goes to change the methods such as the series of motor, voltage, electric current, frequency using electronic circuit or micro-chip processor The rotating speed of controlled motor, so that motor reaches a kind of electrical switch of higher performance.

, in the form of button, operator is by promoting button, band movable slider for speed-regulating switch great majority in the market Slide in pcb board, realize being adjusted the rotating speed of motor；Traditional button speed-regulating switch, the distance of its button pressed downwards Distance is slid in pcb board equal to slide block, when operator encounters button by mistake, the rotating speed of motor can be caused to occur suddenly to turn Change, affect the normal work of motor.

The content of the invention

The purpose of this utility model is to provide a kind of speed-regulating switch of short stroke, this practicality for the deficiencies in the prior art It is new by using lever principle, the displacement of the displacement of resistance arm less than power arm, it is ensured that trigger is by external force When touching by mistake, push handle promotes the distance that slip terminal slides on the first contact chip relatively short, and the distance that slip terminal slides is not Be enough to change the rotation speed change of motor, it is ensured that the normal work of motor.

This utility model is achieved through the following technical solutions, a kind of speed-regulating switch of short stroke, including base, institute The side for stating base is provided with pcb board, and the pcb board is provided with the first contact chip, and the upper end of the pcb board is provided with and first The slip terminal that contact chip is slidably connected, the upper end of the base are provided with push handle and drive the trigger of push handle linear motion, institute The front end for stating push handle is fixedly connected with slip terminal, and the rear end of the push handle is hinged with the upper end of trigger, and the trigger also sets up The one end for having support bar, the support bar is connected with base, and the other end and the trigger of the support bar are hinged, with trigger and support The hinged place of bar is separation, and trigger is divided into power arm and resistance arm by separation, and the length of the power arm is more than the resistance The length of the arm of force.

Preferably, the front end of the push handle is additionally provided with draw-in groove, the upper end of the slip terminal is provided with and draw-in groove card The fixture block for connecing.

Preferably, the upper end of the base is additionally provided with switch module, the switch module include master switch terminal, Two contact chips and the auxiliary switch terminal being arranged above master switch terminal, the front end of the push handle is provided with contact head, described to connect Contact is slidably connected with the second contact chip.

Preferably, second contact chip includes main part and the bending part of bending upwards, the auxiliary switch terminal with The bending part of the second contact chip is fixedly connected.

Preferably, the bending angle between the bending part and main part is 30 degree to 50 degree.

Preferably, the resistance arm is provided with the spring for resetting, one end of the spring spring is connected with base, The other end of the spring is connected with resistance arm.

The beneficial effects of the utility model：A kind of speed-regulating switch of short stroke, including base, the side of the base are arranged There is a pcb board, the pcb board is provided with the first contact chip, the upper end of the pcb board is provided with and is slidably connected with the first contact chip Slip terminal, the upper end of the base are provided with push handle and drive the trigger of push handle linear motion, the front end of the push handle and cunning Moved end is fixedly connected, and the rear end of the push handle is hinged with the upper end of trigger, and the trigger is additionally provided with support bar, the support One end of bar is connected with base, and the other end and the trigger of the support bar are hinged, with the hinged place of trigger and support bar as boundary Trigger is divided into power arm and resistance arm by point, separation, and the length of the power arm is more than the length of the resistance arm, by profit With lever principle, the displacement of the displacement of resistance arm less than power arm, it is ensured that trigger when being touched by external force by mistake, push handle Promote the distance that slip terminal slides on the first contact chip relatively short, the distance that slip terminal slides is not enough to change motor Rotation speed change, it is ensured that the normal work of motor.

Description of the drawings

Fig. 1 is dimensional structure diagram of the present utility model.

Fig. 2 is decomposition texture schematic diagram of the present utility model.

Specific embodiment

1 to accompanying drawing 2, and specific embodiment below in conjunction with the accompanying drawings are described further to this utility model.

As shown in Figure 1 to Figure 2, a kind of speed-regulating switch of short stroke, including base 1, the side of the base 1 are provided with Pcb board 5, the pcb board 5 are provided with the first contact chip 51, and the upper end of the pcb board 5 is provided with is slided with the first contact chip 51 The slip terminal 52 of connection, the upper end of the base 1 are provided with push handle 3 and drive the trigger 4 of the linear motion of push handle 3, described to push away The front end of handle 3 is fixedly connected with slip terminal 52, and rear end and the upper end of trigger 4 of the push handle 3 are hinged, and the trigger 4 also sets Support bar 6 is equipped with, one end of the support bar 6 is connected with base 1, the other end and the trigger 4 of the support bar 6 are hinged, to pull Machine 4 is separation with the hinged place of support bar 6, and 4 points by trigger of separation is power arm 41 and resistance arm 42, the power arm 41 Length more than the resistance arm 42 length.

The first contact chip 51 on pcb board 5, the first contact chip 51 are carved with some speed governing gears, two adjacent speed governing shelves There is spacing distance between position, when slip terminal 52 slides into another speed governing gear from a speed governing gear, realize motor Rotating speed is changed, and the present embodiment is when operator encounters trigger 4 by mistake, because the length of power arm 41 is more than the length of resistance arm 42, According to lever principle, as fulcrum, the displacement of the power arm 41 of trigger 4 is more than resistance to the hinged place with trigger 4 and support bar 6 The displacement of arm 42, i.e. push handle 3 promote what the distance that slip terminal 52 slides on the first contact chip 51 was pulled less than trigger 4 Distance, is shortened in 51 up stroke distance of the first contact chip by controlling slip terminal 52 so that slip terminal 52 cannot be from one Speed governing gear slides into another speed governing gear, and the rotating speed of motor cannot be changed, it is ensured that the normal work of motor, make the tune of motor Speed is more accurate.

In the present embodiment, the front end of the push handle 3 is additionally provided with draw-in groove 32, the upper end of the slip terminal 52 be provided with The fixture block 521 of 32 clamping of draw-in groove, it is ensured that push handle 3 is fixedly connected with slip terminal 52.

In the present embodiment, the upper end of the base 1 is additionally provided with switch module 2, and the switch module 2 includes master switch end Sub 21, second contact chip 22 and the auxiliary switch terminal 23 being arranged above master switch terminal 21, the front end of the push handle 3 is provided with Contact head 31, the contact head 31 are slidably connected with the second contact chip 22, second contact chip 22 include main part 221 and to The bending part 222 of upper bending, the auxiliary switch terminal 23 are fixedly connected with the bending part 222 of the second contact chip 22, and push handle 3 drives The bending part 222 of the second contact chip 22 is downwardly turned over so that auxiliary switch terminal 23 is contacted with master switch terminal 21, that is, the electricity for switching Road closes, and speed-regulating switch is started working.

In the present embodiment, the bending angle between the bending part 222 and main part 221 is 30 degree to 50 degree, bending angle Hour is spent, then when the main part 221 of the second contact chip 22 is flipped up, interference can be produced to push handle 3, be affected push handle 3 to drive Master switch terminal 21 is closed with auxiliary switch terminal 23；The bending part 222 of the second contact chip 22 when bending angle is excessive, then occurs The diastema for waving is excessive, causes speed governing not accurately situation.

In the present embodiment, the resistance arm 42 is provided with the spring 7 for resetting, one end and bottom of the spring spring 7 Seat 1 connects, and the other end of the spring is connected with resistance arm 42, when operator pulls trigger 4, meeting extension spring 7, in operation When person stops exerting a force to trigger 4, resistance arm 42 is driven to reset by 7 deformation of spring so that operation is more convenient.

Above content is only preferred embodiment of the present utility model, for one of ordinary skill in the art, according to this reality With new thought, will change in specific embodiments and applications, this specification content should not be construed as To restriction of the present utility model.

Claims

1. a kind of speed-regulating switch of short stroke, including base（1）, it is characterised in that：The base（1）Side be provided with PCB Plate（5）, the pcb board（5）It is provided with the first contact chip（51）, the pcb board（5）Upper end be provided with and the first contact chip （51）The slip terminal being slidably connected（52）, the base（1）Upper end be provided with push handle（3）With driving push handle（3）Straight line is transported Dynamic trigger（4）, the push handle（3）Front end and slip terminal（52）It is fixedly connected, the push handle（3）Rear end and trigger （4）Upper end be hinged, the trigger（4）It is additionally provided with support bar（6）, the support bar（6）One end and base（1）Connection, The support bar（6）The other end and trigger（4）It is hinged, with trigger（4）With support bar（6）Hinged place be separation, boundary Put trigger（4）It is divided into power arm（41）And resistance arm（42）, the power arm（41）Length be more than the resistance arm（42） Length.

2. the speed-regulating switch of a kind of short stroke according to claim 1, it is characterised in that：The push handle（3）Front end also It is provided with draw-in groove（32）, the slip terminal（52）Upper end be provided with and draw-in groove（32）The fixture block of clamping（521）.

3. the speed-regulating switch of a kind of short stroke according to claim 1, it is characterised in that：The base（1）Upper end also It is provided with switch module（2）, the switch module（2）Including master switch terminal（21）, the second contact chip（22）Be arranged at master Switch terminal（21）The auxiliary switch terminal of top（23）, the push handle（3）Front end be provided with contact head（31）, the contact head （31）With the second contact chip（22）It is slidably connected.

4. the speed-regulating switch of a kind of short stroke according to claim 3, it is characterised in that：Second contact chip（22）Bag Include main part（221）The bending part of bending upwards（222）, the auxiliary switch terminal（23）With the second contact chip（22）Bending Portion（222）It is fixedly connected.

5. the speed-regulating switch of a kind of short stroke according to claim 4, it is characterised in that：The bending part（222）With master Body portion（221）Between bending angle be 30 degree to 50 degree.

6. the speed-regulating switch of a kind of short stroke according to claim 3, it is characterised in that：The resistance arm（42）It is provided with For the spring for resetting（7）, the spring spring（7）One end and base（1）Connection, the other end and resistance arm of the spring （42）Connection.