CN212136298U - Dustproof switch - Google Patents

Abstract

The utility model provides a dustproof switch belongs to the switch technology field. It has solved the current dustproof not good problem of signal switch that does not brush. This dust switch includes casing, trigger, adjustable shelf, driving lever and circuit part, and the circuit part is located the casing, and the switching-over of driving lever control circuit part is opened on the casing and is passed the hole, and the adjustable shelf can be for the opening and closing of casing reciprocating motion with control circuit part, the cover has a tube-shape sealing washer on the extension end of adjustable shelf, and the upper end of sealing washer is through first seal structure and adjustable shelf sealing connection, and the lower extreme passes through second seal structure and casing sealing connection, and the main part between sealing washer upper end and the lower extreme can be compressed or tensile along with the adjustable shelf motion. The movable frame is sleeved with a cylindrical sealing ring, sealing between the movable frame and the trigger and the shell is realized, and the movable frame is connected with the upper end and the lower end of the sealing ring without looseness in the moving process, so that the integral sealing performance is ensured.

Description

Dustproof switch

Technical Field

The utility model belongs to the technical field of the switch, a dustproof switch is related to.

Background

Brushless signal switch uses extensively in various brushless electric tool, because brushless signal switch belongs to weak current control switch, its inside switching circuit arranges closely, receive the influence of dust easily, the ash layer has been gathered on the switching circuit in the switch, lead to the switching failure of circuit easily, and in electric tool's operational environment, because traditional brushless signal switch sealing performance is not strong, therefore the dust gets into in the casing easily, influence the normal break-make of circuit, especially brushless signal direct current switch who has the switching-over function, because be provided with on the casing and dial handle swing hole, therefore the dust gets into in the casing very easily through dialling handle swing hole, depend on switching circuit, cause the malfunctioning of switching circuit, shorten the life of switch.

The seal of adjustable shelf, conventional is directly to fix the sealing washer on adjustable shelf and casing, when pressing certain life-span, the dust can be pressed inside the switch, does not reach fine dustproof effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems of the existing direct current brushless switch and providing a dustproof switch with good sealing effect.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a dustproof switch, includes casing, trigger, adjustable shelf, driving lever and circuit part, and the circuit part is located the casing, the driving lever is located the casing outside, and one end stretches into the switching-over of control circuit part in the casing, and it has the hole of wearing to open on the casing, and the main part setting of adjustable shelf is in the casing, and the casing is stretched out to activity one end and is connected with the trigger, the adjustable shelf can be for casing reciprocating motion with the switching of control circuit part, its characterized in that, the cover has the sealing washer of a tube-shape on the stretching out of adjustable shelf, and the upper end of sealing washer is through first seal structure and adjustable shelf sealing connection, and the lower extreme passes through second seal structure and casing sealing connection, and the main part between sealing washer upper end and the lower extreme can be.

In foretell dustproof switch, first seal structure including seting up the first draw-in groove in adjustable shelf extension periphery, the inner wall of sealing washer upper end is equipped with annular first card strip, first card strip corresponds the card and establishes in above-mentioned first draw-in groove.

In the above-mentioned dustproof switch, the outer wall of the upper end of the sealing ring is in interference fit with the trigger.

In the above-mentioned dust-proof switch, the main body of the sealing ring is continuously bent in the opposite direction.

In the above-mentioned dustproof switch, the second seal structure include set up the multichannel second draw-in groove on the above-mentioned inner wall that wears out, the outer wall of sealing washer lower extreme is equipped with many second card strips with above-mentioned second draw-in groove one-to-one joint.

In foretell dustproof switch, the periphery of sealing washer still is equipped with the round and hides along, should hide the lower terminal surface on edge and the outside laminating of casing and cover the sealing washer with wearing out the clearance between the hole.

In the above-mentioned dustproof switch, a plurality of second card slots are arranged in parallel at intervals.

In the above-mentioned dust-proof switch, the housing includes an upper cover and a base, and the upper cover and the base are fastened to each other to form a cavity for accommodating the circuit portion and the movable frame main body.

In foretell dustproof switch, the driving lever include stirring portion, pivot and drive division, it has the switching-over hole to open on the casing, and the pivot setting is downthehole and can the free rotation at this switching-over, the outer end of pivot and the outside stirring portion fixed connection of casing, the drive division fixed connection in inner and the casing, be equipped with first joint structure between pivot and the switching-over hole pore wall, this first joint structure sets up the third draw-in groove with above-mentioned third draw-in groove of third draw-in groove one-to-one including setting up two at least annular third card strips in pivot outside portion on the switching-over downthehole wall.

In foretell dustproof switch, the outside of casing is equipped with the stopper, and it has the spacing hole with the inside intercommunication of casing to open on the stopper, and the inner of above-mentioned pivot is worn out and is fixed from this stopper and be equipped with spacing portion, is equipped with second joint structure between pivot and this spacing hole, and second joint structure sets up the fourth draw-in groove with above-mentioned fourth card strip one-to-one including setting up two at least annular fourth card strips in the pivot outside on the spacing downthehole wall.

In the above-mentioned dustproof switch, the base and the upper cover are both of a double-layer structure.

In the above-mentioned dustproof switch, the limiting hole, the through hole and the reversing hole are formed by buckling the upper cover and the base.

Compared with the prior art, the movable frame is sleeved with the cylindrical sealing ring, sealing is realized between the cylindrical sealing ring and the trigger and the shell, and the movable frame is not loosened in the moving process due to connection of the upper end and the lower end of the sealing ring, so that the whole sealing performance is ensured. The base and the upper cover both adopt a double-layer structure, and a double-layer seal is formed after buckling. The joint of the reversing hole and the rotating shaft is also sealed in multiple ways through the matching of a plurality of clamping strips and clamping grooves.

Drawings

Fig. 1 is a schematic diagram of the explosion structure of the present invention.

FIG. 2 is a cross-sectional view of the movable frame, trigger and housing.

Fig. 3 is a schematic structural view of the seal ring.

Fig. 4 is a sectional view of the lever in cooperation with the housing.

Fig. 5 is a schematic structural view of the shift lever.

In the figure, 1, a housing; 2. a trigger; 3. a deflector rod; 4. a circuit portion; 5. a base; 6. an upper cover; 7. an outlet hole is formed; 8. a reversing hole; 9. a limiting hole; 10. a push rod; 11. a movable frame; 12. a seal ring; 13. a first card slot; 14. a first clip strip; 15. a second card slot; 16. a second card strip; 17. covering edges; 18. a limiting block; 19. a toggle part; 20. a drive section; 21. a limiting part; 22. a rotating shaft; 23. a third clamping strip; 24. a third card slot; 25. a fourth clamping strip; 26. and a fourth card slot.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the dustproof switch comprises a shell 1, a trigger 2, a movable frame 11, a shifting lever 3 and a circuit part 4, wherein the shell 1 comprises a base 5 and an upper cover 6, the base 5 and the upper cover 6 are both of a double-layer structure, a plurality of gaps are arranged on the base 5 and the upper cover 6, after the base 5 and the upper cover 6 are mutually buckled, the gaps are spliced to form a penetrating hole 7, a reversing hole 8, a limiting hole 9 and the like, and a containing cavity is formed inside the shell 1.

The circuit part 4 and the main body of the movable frame 11 are arranged in the containing cavity, the push rod 10 part on the movable frame 11 extends out of the through hole 7 and is connected with the trigger 2, the movable frame 11 can reciprocate relative to the shell 1 to control the opening and closing of the circuit part 4, the deflector rod 3 is positioned outside the shell 1, and one end of the deflector rod extends into the shell 1 to control the reversing of the circuit part 4.

As shown in fig. 2 and 3, a cylindrical sealing ring 12 is sleeved on the push rod 10 of the movable frame 11, the upper end of the sealing ring 12 is connected with the movable frame 11 in a sealing manner through a first sealing structure, and the lower end is connected with the housing 1 in a sealing manner through a second sealing structure. The first sealing structure comprises a first clamping groove 13 formed in the periphery of the push rod 10, an annular first clamping strip 14 is arranged on the inner wall of the upper end of the sealing ring 12, the first clamping strip 14 is correspondingly clamped in the first clamping groove 13, and the upper end of the push rod 10 is tightly inserted into the trigger 2, so that the upper end of the sealing ring 12 is tightly clamped. The second seal structure is including seting up multichannel second draw-in groove 15 on the above-mentioned hole 7 inner wall of wearing, and the outer wall of sealing washer 12 lower extreme is equipped with many second card strips 16 with above-mentioned second draw-in groove 15 one-to-one joint, and multichannel second draw-in groove 15 is parallel to each other the interval and sets up, and the periphery of sealing washer 12 still is equipped with the round and hides along 17, should hide the lower terminal surface of edge 17 and the laminating of the outside of casing 1 and cover sealing washer 12 and the clearance between the hole 7 of wearing out.

The main body portion of the sealing ring 12, which is continuously reversely bent, can be compressed or stretched as the movable frame 11 moves.

As shown in fig. 4 and 5, a limiting block 18 is fixedly arranged outside the housing 1, a limiting hole 9 is formed in the limiting block 18, the limiting hole 9 is communicated with the inner cavity and is positioned on the same axis with the reversing hole 8, the shift lever 3 comprises a shifting portion 19, a rotating shaft 22, a driving portion 20 and a limiting portion 21, the rotating shaft 22 is arranged in the reversing hole 8 and can rotate freely, the outer end of the rotating shaft 22 is fixedly connected with the shifting portion 19 outside the housing 1, the inner end of the rotating shaft penetrates through the reversing hole 8 and is fixedly connected with the limiting portion 21, the middle of the rotating shaft 22 is fixedly connected with the driving portion 20, and the driving portion 20 is positioned in the accommodating cavity and used for reversing the driving circuit portion 4.

First joint structure and second joint structure have between pivot 22 and the switching-over hole 8, two joint structure divide and establish the both sides at drive division 20, first joint structure is including setting up two at least annular third card strips 23 in pivot 22 outside portion, set up the third draw-in groove 24 with above-mentioned third card strip 23 one-to-one on the switching-over hole 8 inner wall, second joint structure is including setting up two at least annular fourth card strips 25 in the pivot 22 outside, set up the fourth draw-in groove 26 with above-mentioned fourth card strip 25 one-to-one on the spacing hole 9 inner wall.

The trigger 2 is pressed down, and the opening and closing of the circuit part 4 are controlled through the lifting motion of the movable frame 11; when reversing, the driving lever 3 is pulled, the driving part 20 rotates, and the reversing of the circuit part 4 is controlled, and the reversing and opening and closing functions of the circuit part 4 belong to the prior art, so the description is omitted.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e. in a manner equivalent to "including at least … …", and not in a closed manner, i.e. in a manner not to be interpreted as "including … … only".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides a dustproof switch, includes casing, trigger, adjustable shelf, driving lever and circuit part, and the circuit part is located the casing, the driving lever is located the casing outside, and one end stretches into the switching-over of control circuit part in the casing, and it has the hole of wearing to open on the casing, and the main part setting of adjustable shelf is in the casing, and the casing is stretched out to activity one end and is connected with the trigger, the adjustable shelf can be for casing reciprocating motion with the switching of control circuit part, its characterized in that, the cover has the sealing washer of a tube-shape on the stretching out of adjustable shelf, and the upper end of sealing washer is through first seal structure and adjustable shelf sealing connection, and the lower extreme passes through second seal structure and casing sealing connection, and the main part between sealing washer upper end and the lower extreme can be.

2. The dust-proof switch of claim 1, wherein the first sealing structure comprises a first clamping groove formed on the periphery of the extending portion of the movable frame, an annular first clamping strip is arranged on the inner wall of the upper end of the sealing ring, and the first clamping strip is correspondingly clamped in the first clamping groove.

3. The dust switch of claim 2, wherein the outer wall of the upper end of the sealing ring is in interference fit with the trigger.

4. A dust switch according to claim 1, 2 or 3, wherein the main body portion of the sealing ring is continuously reverse bent.

5. A dust-proof switch according to claim 1, 2 or 3, wherein the second sealing structure includes a plurality of second engaging grooves formed on the inner wall of the through hole, and a plurality of second engaging strips engaged with the second engaging grooves in a one-to-one correspondence are formed on the outer wall of the lower end of the sealing ring.

6. A dust-proof switch according to claim 1, 2 or 3, wherein the outer periphery of the sealing ring is further provided with a shielding edge, the lower end surface of the shielding edge is attached to the outer side of the housing and covers the gap between the sealing ring and the through hole.

7. The dust-proof switch according to claim 1, 2 or 3, wherein the housing comprises an upper cover and a base, and the upper cover and the base are buckled with each other to form a cavity for accommodating the circuit part and the movable frame main body.

8. The dustproof switch according to claim 1, 2 or 3, wherein the shift lever comprises a shifting portion, a rotating shaft and a driving portion, the housing is provided with a reversing hole, the rotating shaft is arranged in the reversing hole and can rotate freely, the outer end of the rotating shaft is fixedly connected with the shifting portion outside the housing, the inner end of the rotating shaft is fixedly connected with the driving portion inside the housing, a first clamping structure is arranged between the rotating shaft and the wall of the reversing hole, the first clamping structure comprises at least two annular third clamping strips arranged at the outer side portion of the rotating shaft, and the inner wall of the reversing hole is provided with third clamping grooves corresponding to the third clamping strips one to one.

9. The dustproof switch according to claim 8, wherein a limiting block is arranged outside the housing, a limiting hole communicated with the inside of the housing is formed in the limiting block, the inner end of the rotating shaft penetrates out of the limiting block and is fixedly provided with a limiting portion, a second clamping structure is arranged between the rotating shaft and the limiting hole, the second clamping structure comprises at least two annular fourth clamping strips arranged outside the rotating shaft, and fourth clamping grooves corresponding to the fourth clamping strips in a one-to-one manner are formed in the inner wall of the limiting hole.

10. The dust switch of claim 7, wherein the base and the cover are of a double-layer structure.

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