A kind of switch mechanism for opening/closing of electric tool
[technical field]
The present invention relates to a kind of switch mechanism for opening/closing, especially a kind of electric tool switch mechanism for opening/closing of double-button control.
[background technology]
Electric tool is because its convenient, labour-saving advantage, be widely used in such as occasions such as family, gardens, for people provide convenience, but the danger of electric tool itself is than original tool height, must prevent that operating personnel from causing contingency because of the instrument that the accident touching runs up, so electric tool must be stable and reliable for performance, guarantees personal safety, existing electric tool adopts double-button control more, improves the fail safe of operation by double-button.
Publication number discloses a kind of Machinery Brake Prune Machine Dual-Button Controlling Organization in the patent documentation of " CN201119317Y ", it comprises casing, be provided with the electric machine assembly that drives blade movement in the casing, the starter motor assembly be switch trigger on the switch, it is touched by the top cap on the push rod that is located on fixed mount and the center bearing bracket opens, described push rod lower end is provided with the brake block of brake blade motion, push rod by first link gear through wirerope connect be located at shank after button, button before connecting by second link gear again, it is characterized in that described first link gear comprises the push rod supporting plate fixing with push rod, this push rod supporting plate has a supporting plate groove, the supporting plate groove is enclosed within on the location-plate, the push rod supporting plate along location-plate be free to slide and drive corresponding with its fixing push rod on, following mobile, resetted by the push rod back-moving spring that is located between fixed mount and the push rod supporting plate, the wirerope two ends that are connected with push rod snap onto respectively on back button and the push rod supporting plate by the wirerope pull head, be located at the supporting plate back-moving spring between fixed mount and the push rod supporting plate, back button rotates around back button fulcrum, described second link gear comprises bridge plate and the steel wire that is connected one with preceding button, steel wire one end of crank-like connects bridge plate, the other end is located under the push rod supporting plate, the two ends of bridge plate back-moving spring connect casing and bridge plate respectively, and bridge plate rotates around the bridge plate fulcrum.Button and back button can make machine startup before pressing simultaneously, but the link gear in the middle of this actuating mechanism still complicated, cost is high, and the structural principle complexity certainly will cause and install complicatedly, and the fault odds increases, and the situation that switch can't open or can't cut out takes place easily.
Therefore, how simplifying the structure of switch mechanism for opening/closing, is the present technical issues that need to address of those skilled in the art.
[summary of the invention]
The invention provides a kind of switch mechanism for opening/closing of electric tool, structural principle is simple, reduces when element reduces cost to guarantee the reliable and stable of operation.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of switch mechanism for opening/closing of electric tool, comprise switch, the first trigger assembly, the second trigger assembly and switch triggering mechanism, the described first trigger assembly and the second trigger assembly are by switch triggering mechanism controls switch, described switch triggering mechanism comprises STATEMENT OF FEDERALLY SPONSORED and can be driven the frizzen of action by described STATEMENT OF FEDERALLY SPONSORED, described STATEMENT OF FEDERALLY SPONSORED is connected between the first trigger assembly and the second trigger assembly, and STATEMENT OF FEDERALLY SPONSORED only can drive frizzen and make switch connection when the first trigger assembly and the second trigger assembly are pressed simultaneously, described switch mechanism for opening/closing also comprises return unit, described return unit drives frizzen and resets when the first trigger assembly or the second trigger assembly unclamp, switch is disconnected.
Further, described frizzen one end and STATEMENT OF FEDERALLY SPONSORED switching, the described frizzen other end is provided with the contact of energy trigger switch.
Further, described switch is the tactile switch of point, and described contact is for being located at projection on the frizzen.
Further, described frizzen is located at a side of switch, and described switch is located between STATEMENT OF FEDERALLY SPONSORED and the contact.
Further, described frizzen and the STATEMENT OF FEDERALLY SPONSORED end of transferring is provided with through hole, the described through hole of described STATEMENT OF FEDERALLY SPONSORED cross-under.
Further, described STATEMENT OF FEDERALLY SPONSORED comprises segmental arc, and the two ends of described segmental arc are provided with the boss of transfer the respectively first trigger assembly and the second trigger assembly.
Further, described return unit comprises spring, and described frizzen is provided with the jut that connects spring, when pressing the first trigger assembly and the second trigger assembly, camber of spring, unclamp the first trigger assembly or the second trigger assembly after, the moving frizzen of spring band resets.
Further, the described first trigger assembly and the second trigger assembly include can be around the flap of fixing point rotation, and an end of flap and boss switching are rotated flap and can be driven the STATEMENT OF FEDERALLY SPONSORED action.
Further, described switch mechanism for opening/closing also comprises the locating part of the restriction first trigger assembly and the second trigger assembly scope of activities.
Further, described locating part comprises the guide vane end stop of restriction flap rotational angle.
Beneficial effect of the present invention:
Switch triggering mechanism structure principle is simple in the switch mechanism for opening/closing of the present invention, drive by the STATEMENT OF FEDERALLY SPONSORED both sides first trigger assembly and the second trigger assembly, thereby the control frizzen is switched on or switched off switch, the first trigger assembly and the second trigger assembly scope of activities are limited, therefore only can when pressing simultaneously, the first trigger assembly and the second trigger assembly just make switch connection, after the precalculated position arranges each element, just can control switch by simple and mechanical structure, the intermediate link that realizes function under the prerequisite of assurance instrument fail safe obtains simplifying, and is reliable and stable, reduce cost.
These characteristics of the present invention and advantage will be below embodiment, accompanying drawing in detailed exposure.
[description of drawings]
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the front view of STATEMENT OF FEDERALLY SPONSORED among the present invention;
Fig. 3 is the front view of frizzen among the present invention.
[embodiment]
The invention provides a kind of switch mechanism for opening/closing of electric tool, comprise switch, the first trigger assembly, the second trigger assembly and switch triggering mechanism, the described first trigger assembly and the second trigger assembly are by switch triggering mechanism controls switch, described switch triggering mechanism comprises STATEMENT OF FEDERALLY SPONSORED and can be driven the frizzen of action by described STATEMENT OF FEDERALLY SPONSORED, described STATEMENT OF FEDERALLY SPONSORED is connected between the first trigger assembly and the second trigger assembly, and STATEMENT OF FEDERALLY SPONSORED only can drive frizzen and make switch connection when the first trigger assembly and the second trigger assembly are pressed simultaneously, described switch mechanism for opening/closing also comprises return unit, described return unit drives frizzen and resets when the first trigger assembly or the second trigger assembly unclamp, switch is disconnected.Compare link gear complicated in the background technology, this mechanism drives the frizzen control switch by two different triggers by STATEMENT OF FEDERALLY SPONSORED, and simple structure is reliable, and principle is simple, and cost is low.
Be explained and illustrated below in conjunction with the accompanying drawing of the embodiment of the invention technical scheme to the embodiment of the invention, but following embodiment is the preferred embodiments of the present invention only, is not whole.Based on the embodiment in the execution mode, those skilled in the art belong to protection scope of the present invention at following other embodiment that obtains of the prerequisite of not making creative work.
With reference to figure 1, Fig. 2 and Fig. 3, shown in the switch mechanism for opening/closing of electric tool, comprise switch 6, the first trigger assembly 3, the second trigger assembly 4, return unit 5 and switch triggering mechanism, switch triggering mechanism comprises STATEMENT OF FEDERALLY SPONSORED 2 and can be driven the frizzen 1 of action by STATEMENT OF FEDERALLY SPONSORED 2, STATEMENT OF FEDERALLY SPONSORED 2 is connected between the first trigger assembly 3 and the second trigger assembly 4, STATEMENT OF FEDERALLY SPONSORED 2 only can drive frizzen 1 when the first trigger assembly 3 and the second trigger assembly 4 are pressed simultaneously connect switch 6, return unit 5 drives frizzen 1 and resets when the first trigger assembly 3 or the second trigger assembly 4 unclamp, switch 6 is disconnected.
Frizzen 1 one ends and STATEMENT OF FEDERALLY SPONSORED 2 switchings, the other end is provided with the contact 11 of trigger switch 6.The first trigger assembly 3 at STATEMENT OF FEDERALLY SPONSORED 2 two ends and the second trigger assembly 4 are common to drive frizzens 1 motion, thereby makes contact 11 trigger switches 6 on the frizzen 1.
Preferred switch 6 is the tactile switch of point, and contact 11 is protruding for being located on the frizzen 1, thereby protruding contact-making switch is connected switch 6; Switch and the contact replaced also can be other forms, and for example switch is electromagnetic switch, and contact is the magnetic patch that is located on the frizzen.
The detail location of element: frizzen 1 is located at a side of switch 6, switch 6 is located between STATEMENT OF FEDERALLY SPONSORED 2 and the contact 11, frizzen 1 reciprocating motion under the first trigger assembly 3 and the second trigger assembly 4 or the effect of return unit 5, contact 11 on the frizzen 1 and switch 6 contacts or separate, being switched on or switched off of control switch 6.
With reference to figure 1 and Fig. 3, the substitute mode of frizzen 1 and STATEMENT OF FEDERALLY SPONSORED 2: frizzen 1 is provided with through hole 12 with STATEMENT OF FEDERALLY SPONSORED 2 switchings one end, STATEMENT OF FEDERALLY SPONSORED 2 cross-under through holes 12 and can in through hole 12, rotate and mobile, when pressing the first trigger assembly 3 or the second trigger assembly 4 separately, STATEMENT OF FEDERALLY SPONSORED 2 one ends are pulled, STATEMENT OF FEDERALLY SPONSORED 2 deflects, this moment, the contact 11 on the frizzen 1 approached but still can not trigger switch 6, only press another trigger assembly, after making the other end rising of STATEMENT OF FEDERALLY SPONSORED 2, contact 11 could contact and trigger switch 6.
With reference to figure 1 and Fig. 2, STATEMENT OF FEDERALLY SPONSORED 2 among the present invention comprises segmental arc, the two ends of segmental arc are provided with the boss of transfer the respectively first trigger assembly 3 and the second trigger assembly 4, the segmental arc cross-under is in the through hole 12 of frizzen 1, and the top of segmental arc opening in figure, segmental arc can be rotated in through hole and movement; Certainly STATEMENT OF FEDERALLY SPONSORED also can only be the straight-bar that passes through hole, but the structure of segmental arc is rotated more reliably, is difficult for stuck.
Return unit 5 in this mechanism is spring, and frizzen 1 is provided with the jut 13 that connects spring, when pressing the first trigger assembly 3 and the second trigger assembly 4, camber of spring, after unclamping the first trigger assembly 3 or the second trigger assembly 4, spring drives frizzen 1 and moves, and contact 11 separates with switch 6.
Spring shown in Figure 1 is stage clip, the stage casing of frizzen is provided with the step of bending, the jut that connects stage clip is set on the step, machine case is provided with locating piece, locating piece is located between step and the STATEMENT OF FEDERALLY SPONSORED, when the first trigger assembly and the second trigger assembly pressed down and drive frizzen and move, stage clip was compressed between step and the locating piece, and the bounce-back that the first trigger assembly and the second trigger assembly unclamp rear compression spring drives contact and separates with switch; Spring also can be other types, for example extension spring, and extension spring is stretched in the frizzen moving process, unclamps the first trigger assembly and the second trigger assembly, and extension spring drives frizzen and replys.
With reference to figure 1, the above-mentioned first trigger assembly 3 and the second trigger assembly 4 include flap, flap and machine case switching, can rotate around housing, one end of the second trigger assembly, 4 flaps and the switching of the boss of STATEMENT OF FEDERALLY SPONSORED 2, the other end is provided with button, one end of the first trigger assembly, 3 flaps connects the boss of STATEMENT OF FEDERALLY SPONSORED 2, the other end and machine case switching, when pressing the button of the second trigger assembly 4 downwards and upwards pressing the flap of the first trigger assembly 3, the flap rotation drives STATEMENT OF FEDERALLY SPONSORED and rises, move the close and trigger switch of the contact on the frizzen thereby drive frizzen.The replacement structure of the first trigger assembly 3 and the second trigger assembly 4 also can for: the first trigger assembly and the second trigger assembly include flap and button, flap and machine case switching can be rotated around housing, one end of flap and the switching of the boss of STATEMENT OF FEDERALLY SPONSORED arrange button on the other end of flap.When pressing down two buttons simultaneously, the flap rotation, the STATEMENT OF FEDERALLY SPONSORED that drives on the flap other end rises, and moves the close and trigger switch of the contact on the frizzen thereby drive frizzen.
For guaranteeing that STATEMENT OF FEDERALLY SPONSORED only can could drive frizzen and make switch connection when the first trigger assembly and the second trigger assembly are pressed simultaneously, need to arrange locating part on the switch mechanism for opening/closing, locating part can limit the scope of activities of the first trigger assembly and the second trigger assembly.
Preferred version, locating part comprises the guide vane end stop 7 that is located on the housing, the flap top of the first trigger assembly 3 and the second trigger assembly 4 is equipped with this guide vane end stop 7, the rotational angle of guide vane end stop restriction flap, when pressing the first trigger assembly or the second trigger assembly, contact on the STATEMENT OF FEDERALLY SPONSORED drive frizzen is near switch, but flap is because the barrier effect of guide vane end stop can't continue rotation, contact also can't touch switch, after only pressing another trigger assembly, could make that contact touches switch, make switch connection.Certainly, for realizing this function, guide vane end stop also can be arranged on the button below, can limit the rotational angle of flap equally.
By above-described embodiment, purpose of the present invention is by in full force and effect having reached.The personage who is familiar with this technology should be understood that the content that the present invention includes but be not limited to describe in accompanying drawing and the top embodiment.Any modification that does not depart from function of the present invention and structural principle all will be included in the scope of claims.