CN103962630B - Electrotrephine - Google Patents
Electrotrephine Download PDFInfo
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- CN103962630B CN103962630B CN201310034419.4A CN201310034419A CN103962630B CN 103962630 B CN103962630 B CN 103962630B CN 201310034419 A CN201310034419 A CN 201310034419A CN 103962630 B CN103962630 B CN 103962630B
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- stop lever
- casing
- start stop
- electrotrephine
- connecting rod
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 125000006850 spacer group Chemical group 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Abstract
The invention discloses a kind of electrotrephine, including casing, be installed on the switch trigger of casing, and the start stop lever of limit switch trigger travel；Also include base plate, the degree of depth bracing frame being arranged on base plate, and limit the first connecting rod of degree of depth bracing frame stroke；Also include movably controlling element, it has for driving the drive division of first connecting rod and controlling the limiting unit of bar for limit switch, drive division to its displacement with first connecting rod contact surface more than or equal to limiting unit to its displacement with start stop lever contact surface.The electrotrephine of the present invention uses the mode of mechanical linkage to carry out switch protection, simple and reliable, can be prevented effectively from electrotrephine by security incident produced by error starting.<!--1-->
Description
Technical field
The present invention relates to a kind of electrotrephine, particularly to a kind of electrotrephine with switch protection.
Background technology
Electrotrephine have can high speed rotating saw blade and in order to start the switch trigger of motor.At non-job state, if saw blade exposes, for switching the maloperation of trigger, great security incident will be caused.Usually, the saw blade of electrotrephine being arranged movable shield, at job state, along with the relative movement of electrotrephine Yu workpiece, movable shield will gradually expose saw blade to cut workpiece；At non-job state, movable shield covers saw blade under the bias of flexible member, thus avoids the potential safety hazard brought because of maloperation.But still there is problems in that, at non-job state, along with the relative movement of electrotrephine Yu workpiece, saw blade exposes surface of the work gouge easily, affects workpiece attractive in appearance.
It addition, when operator needs that electrotrephine is changed saw blade, movable shield just cannot provide security protection, need switch trigger is arranged safety protection mechanism, to avoid maloperation to start the security incident that motor is caused.Usually, the master switch of electrotrephine is in series with microswitch, utilizes the break-make of the master switch of the form control electrotrephine of the electric break-make of microswitch, thus avoid master switch to be misused triggering.But still there is problems in that, if microswitch is short-circuited, its safeguard protection was i.e. lost efficacy, and now operator carries out routine operation under unwitting situation, easily causes security incident.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of electrotrephine with switch protection, can avoid switching trigger and be misused triggering in routine operation or in the operation of replacing saw blade.
For solving the problems referred to above, the solution of the present invention is: electrotrephine, including casing, is installed in the switch trigger of casing, and the start stop lever for limit switch trigger travel；Also include base plate, the degree of depth bracing frame being arranged on base plate, and limit the first connecting rod of degree of depth bracing frame stroke；It is characterized in that: also include the exercisable control element being arranged in casing, it has for driving the drive division of first connecting rod and controlling the limiting unit of bar for limit switch, drive division to its displacement with first connecting rod contact surface more than or equal to limiting unit to its displacement with start stop lever contact surface.
As a kind of embodiment, controlling element is rotating disk, and drive division is the first protuberance that the side of rotating disk extends outward, and limiting unit is the second protuberance that the side of rotating disk extends outward in the front end of drive division in the first direction.
As another embodiment, controlling element is rotating disk, and drive division is the first arc shaped groove arranged on rotating disk, and limiting unit is the second arc shaped groove arranged on rotating disk, first connecting rod is coordinated by the first spacer pin and the first arc shaped groove, and start stop lever is coordinated by the second spacer pin and the second arc shaped groove.
Improving as one, rotating disk is also associated with being exposed under normal conditions the knob of casing.
As a kind of embodiment, start stop lever is rotatably installed on casing inner wall by bearing pin；Be provided with between start stop lever and switch trigger one can the limit element of limit switch trigger travel scope, drive the work of stroke range controllable switch trigger that limit element disengages switch trigger by rotating of start stop lever；Start stop lever is provided with and makes start stop lever drive the flexible member limiting element to the reset of switch trigger direction；Start stop lever is also connected with exposing under a normality push button of casing.
Specifically, limit element is the protuberance that start stop lever extends to switch trigger direction.
As a kind of embodiment, electrotrephine also includes saw blade, and base plate with casing axle even, base plate is provided with and is suitable to the saw kerf that saw blade passes through rotationally；Start stop lever is provided with the stop part that can contact with degree of depth bracing frame；The axle of definition base plate and casing even point is the center of circle, and stop part to its arc angle with degree of depth bracing frame contact surface is less than the arc angle of saw blade lower end to saw kerf.
Specifically, stop part is the protuberance that start stop lever extends to degree of depth support member direction.
As a kind of embodiment, degree of depth bracing frame offers chute, first connecting rod is rotatably installed on casing inner wall by bearing pin, and it has the limiting section that can be contained in chute to limit degree of depth bracing frame stroke, and orders about its flexible member rotated along the direction that limiting section is chimeric with chute.
As another embodiment, degree of depth bracing frame longitudinally has continuous print the first chute and the second chute from bottom to top along it, and the transverse width of the first chute is less than the transverse width of the second chute；First connecting rod is installed in rotation on casing inner wall by bearing pin and equidirectional with start stop lever interlocks with the rotation；The first boss is extended to the direction of degree of depth bracing frame in the lower end of first connecting rod, and on the first boss, re-extend out the second boss, the transverse width of the second boss is available for it and slides in first chute and the second chute of degree of depth bracing frame, and the transverse width of the first boss can only slide in the second chute of degree of depth bracing frame for it；First connecting rod is also associated with ordering about its flexible member rotated along the direction that the first boss and the second chute are chimeric；And the distance at the two ends of the first arc shaped groove is more than the length of the first boss less than the first boss and the summation of the length of the second boss.
Improve as one, also include second connecting rod；Rotating disk offers notch, and the position of adjacent notch is provided with the first flange；Second connecting rod is rotatably installed on casing inner wall by bearing pin, and its one end has hook portion that can be chimeric with notch, and its other end is provided with the second flange, and second connecting rod is also associated with ordering about its flexible member rotated towards rotating disk；When being in the normal state, the hook portion of second connecting rod and the first Hp contacts；When being rotated in a first direction rotating disk, the hook portion of second connecting rod is chimeric with notch；When casing and base plate pressing in opposite directions, degree of depth bracing frame is oppressed the second flange and makes second connecting rod rotate along the direction that hook portion separates with notch.
Specifically, rotating disk is also associated with ordering about its flexible member rotated along the second direction contrary with first direction.
The electrotrephine of the present invention can limit the stroke of switch trigger in routine operation and the operation changing saw blade, thus avoids the security incident caused by maloperation.And, when being in the normal state, the saw blade of electrotrephine is exposed by restriction, thus avoids under non-job state saw blade gouge workpiece or bring injury to operator.It addition, the switch protection structure of electrotrephine uses mechanical linkage mode to realize, simple and reliable, also it is constantly in restriction state even if breaking down, thus is prevented effectively from operator under unwitting state, carries out the security incident that routine operation is occurred.
Accompanying drawing explanation
Fig. 1 is electrotrephine sectional view under normal conditions.
Fig. 2 is that electrotrephine component under normal conditions coordinates side view.
Fig. 3 be base plate open initial stage rotating disk and first connecting rod coordinate schematic diagram.
Fig. 4 be base plate open initial stage rotating disk and start stop lever coordinate schematic diagram.
Fig. 5 be base plate open initial stage rotating disk and second connecting rod coordinate schematic diagram.
Fig. 6 is the electrotrephine sectional view when changing saw blade.
Fig. 7 is the sectional view using the electrotrephine of another kind of rotating disk embodiment under normal conditions.
Fig. 8 is to use the electrotrephine of another kind of rotating disk embodiment component under normal conditions to coordinate side view.
Fig. 9 is that the component of another kind of rotating disk embodiment coordinates schematic diagram.
The description of reference numerals of concrete parts:
10: casing；11: motor；12: saw blade；13: switch trigger；14 base plates；15: stage clip；16: degree of depth bracing frame；17: movable shield；18: start stop lever；19: first connecting rod；20: second connecting rod；21: control element.
Detailed description of the invention
For convenience of description, following "left", "right", " clockwise ", " counterclockwise " are all consistent with direction shown in the drawings.
As it is shown in figure 1, the electrotrephine 1 for the present invention comprises casing 10, casing 10 is provided with motor 11 and saw blade 12, and motor 11 is connected with saw blade 12 by gearbox assembly (figure is not marked).Be provided with switch trigger 13 in the Handheld Division of casing 10, it can switch on power and make motor 11 start.Electrotrephine 1 also comprises base plate 14, and it by bearing pin (figure do not mark) rotationally with casing 10 axle even, and is provided with between casing 10 and base plate 14 and forces the two to have the stage clip of the trend being located remotely from each other 15.Being additionally provided with on base plate 14 can the degree of depth bracing frame 16 that slides of chute along casing 10 (figure is not marked) and the movable shield 17 of cladding saw blade 12.It addition, be further opened with on base plate 14 being suitable to the saw kerf (figure is not marked) that saw blade 12 passes through.
Referring to Fig. 1 and Fig. 2, electrotrephine 1 also includes the start stop lever 18 being arranged in casing 10.Start stop lever 18 is rotatably installed on the inwall of casing 10 by bearing pin (not shown), being provided with one between itself and switch trigger 13 can the limit element 181 of stroke range of limit switch trigger 13, limit element 181 can be driven to disengage the stroke range of switch trigger 13 by the rotation of start stop lever 18, controllable switch trigger 13 works afterwards.Specifically, switch trigger 13 has one section of pressing stroke towards the direction of the Handheld Division of casing 10, and limit element 181 extends from start stop lever 10 towards the direction of switch trigger 13, and limit element 181 can be a protuberance, it can stop the pressing of switch trigger 13, thus limits power on.Wherein, limit element 181 also includes other implementations, such as, it can include the breach being arranged on start stop lever 18 and switch the protuberance that the trigger 13 direction towards start stop lever 18 is extended, or, it can include the protuberance that start stop lever 18 and switch trigger 13 extend towards out, etc..Start stop lever 18 is additionally provided with and makes it drive the flexible member 182 that limit element 181 resets towards switch trigger 13 direction, and therefore, under normal conditions, owing to limit element 181 limits the stroke range of switch trigger 13, electrotrephine 1 can not start.Flexible member 182 includes multiple implementation, such as, is arranged at the biasing spring between casing 10 inwall and start stop lever 18, or, it is arranged on the torsion spring of the bearing pin position of start stop lever 18, etc..Start stop lever 18 is also associated with a push button 183 exposing casing 10 under normal conditions, therefore, operator can make start stop lever 18 rotate around bearing pin by promoting push button 183, and drive limit element 181 to disengage the stroke range of switch trigger 13, now, electrotrephine 1 can be started by pressing switch trigger 13.Start stop lever 18 is additionally provided with the stop part 184 that can contact, such as one protuberance extended to the direction of degree of depth bracing frame 16 along the lower end of start stop lever 18 with degree of depth bracing frame 16.The axle of definition base plate 14 and casing 10 even point is the center of circle, stop part 184 to its arc angle with the contact surface of degree of depth bracing frame 16 less than the lower end of saw blade 12 to the arc angle of saw kerf.Therefore, under normal conditions, when base plate 14 is resisted against on workpiece and when pressing casing 10 by operator, the stop part 184 of start stop lever 18 can be resisted against on the degree of depth bracing frame 16 of base plate 14 before saw blade 12 exposes saw kerf, thus avoids the direct gouge workpiece of saw blade 12.
Electrotrephine 1 also includes the first connecting rod 19 being arranged in casing 10, it addition, offer chute 161 on degree of depth bracing frame 16.First connecting rod 19 is rotatably installed on the inwall of casing 10 by bearing pin (figure is not marked), and its front end is provided with the limiting section 191 that can be contained in chute 161 with limited depth bracing frame stroke, the hook portion such as extended anteriorly out along the lower end of first connecting rod 19.First connecting rod 19 is also associated with ordering about its flexible member 192 rotated along the direction that limiting section 191 is chimeric with chute 161, therefore, under normal conditions, degree of depth bracing frame 16 slide along casing 10 thus depth of cut of adjustable saw blade 12, i.e. base plate 14 under the restriction of limiting section 191 are limited in the length range of chute 161 around the slewing area of bearing pin Yu casing 10.
Refer to Fig. 3 and Fig. 4, electrotrephine 1 also includes movably controlling element 21, it has for driving the drive division 211 of first connecting rod 19 and controlling the limiting unit 212 of bar 18 for limit switch, and drive division 211 to its displacement with first connecting rod 19 contact surface more than or equal to limiting unit 212 to its displacement with start stop lever 18 contact surface.Such as, controlling element 21 can be a rotating disk being rotatably installed on casing 10 inwall by bearing pin, drive division 211 is the first protuberance that the side of rotating disk extends outward, and limiting unit 212 is the second protuberance that the side of rotating disk extends outward in the front end of drive division in the first direction.First connecting rod 19 extends protuberance 193 towards the direction of drive division 211, when being rotated in a first direction control element 21, the such as counter clockwise direction shown in figure, then drive division 211 will oppress protuberance 193, and make first connecting rod 19 rotate along the direction that limiting section 191 separates with chute 161, now, limiting section 191 will depart from chute 161, therefore, the slip of degree of depth bracing frame 16 can depart from the restriction of limiting section 191, i.e. pivotable sole plate 14 to degree of depth bracing frame 16 and completely disengage from casing 10, thus exposes saw blade 12, now, saw blade 12 can be replaced by operator.Due to drive division 211 to its displacement with first connecting rod 19 contact surface more than or equal to limiting unit 212 to its displacement with start stop lever 18 contact surface, thus, while drive division 211 oppresses protuberance 193, limiting unit 212 is by the body of rod of compressing start stop lever 18, and limits its direction rotation departed from along limit element 181 and switch trigger 13.Now, limit element 181 is by the stroke of limit switch trigger 13, i.e., when operator changes saw blade 12, even if the push button 183 exposing to casing 10 is pushed, start stop lever 18 also cannot rotate, therefore, switch trigger 13 cannot be pressed all the time, it is to avoid during replacing saw blade 12, electrotrephine 1 is by error starting.
Referring to Fig. 7 and Fig. 9, control element 21 based on disk also has another embodiment.Specifically, drive division 211 is the first arc shaped groove arranged on rotating disk, described limiting unit 212 is the second arc shaped groove arranged on rotating disk, described first connecting rod 19 is coordinated with described first arc shaped groove by the first spacer pin (figure is not marked), and described start stop lever 18 is coordinated with described second arc shaped groove by the second spacer pin (figure is not marked).Changing as corresponding, now, start stop lever 18 is not provided with aforesaid stop part 184；Longitudinally having continuous print the first chute 162 and the second chute 163 from bottom to top along it on degree of depth bracing frame 16, the transverse width of the first chute 162 is less than the transverse width of the second chute 163；First connecting rod 19 is not provided with aforesaid limiting section 191 and protuberance 193, and instead, the first boss 194 is stretched out to degree of depth bracing frame 16 in its lower end, stretches out the second boss 195 on the first boss 194 again.Wherein, the transverse width of the second boss 195 is less than the transverse width of the first boss 194, therefore, the second boss 195 can slide in the first chute 162 of degree of depth bracing frame 16 and the second chute 163, and the first boss 194 can only slide in the second chute 163 of degree of depth bracing frame 16.That is, the coboundary (figure is not marked) of the second chute 163 and lower boundary (figure is not marked) limit the sliding scale of the first boss 194, and the lower boundary of the coboundary of the second chute 163 and the first chute 162 (figure is not marked) limits the sliding scale of the second boss 195.Refer to Fig. 8, based on such structure, when being in the normal state, under the effect of flexible member 192, first boss 194 of first connecting rod 19 is in the restriction of the second chute 163, therefore, by casing 10 and base plate 14 pressing in opposite directions, saw blade 12 still can not stretch out the saw kerf of base plate 14, thus avoids exposing the situation of caused gouge workpiece at non-job state saw blade 12.First connecting rod 19 cooperatively forms linkage also by the body of rod of the hook (figure is not marked) extended laterally out with start stop lever 18.Based on such structure, when needs carry out operation, push button 183 is promoted to make start stop lever 18 rotate, the distance of the movement of the first connecting rod 19 linked therewith is only capable of the second chute 164 making the first boss 194 depart from degree of depth bracing frame 16, and the second boss 195 is still in the range of first chute 162 and the second chute 163 of degree of depth bracing frame 16, then base plate 14 can slide up and down in the restriction of the second boss 195.That is, the distance at the two ends, left and right of the drive division 211 of the first arc shaped groove is configured to the length more than the first boss 194 and is less than the summation of the length of the first boss 194 and the second boss 195.Additionally, when operator needs to change saw blade, control element 21 is rotated in a first direction, the direction that the drive division 211 of the first arc shaped groove forces first connecting rod 19 to depart from along the second boss 195 and the second chute 163 by the first spacer pin rotates, so that degree of depth bracing frame 16 departs from the restriction of first connecting rod 19, now, pivotable sole plate 14 to degree of depth bracing frame 16 completely disengages from casing 10 to expose saw blade 12.Due to drive division 211 to its displacement with first connecting rod 19 contact surface more than or equal to limiting unit 212 to its displacement with start stop lever 18 contact surface, thus, while the drive division 211 of the first arc shaped groove acts on first connecting rod 19, the limiting unit 212 of the second arc shaped groove against start stop lever 18 by the second spacer pin, and is limited its direction departed from along limit element 181 and switch trigger 13 and rotates.Now, the stroke of limit element 181 still limit switch trigger 13, even if the push button 183 exposing to casing 10 is pushed, start stop lever 18 also cannot rotate, and therefore, when so can avoid changing saw blade 12, electrotrephine 1 is by error starting.
Additionally, those of ordinary skill in the art are it can be appreciated that control other replacement structures of element 21, such as, control element 21 can also is that one can be along the plectrum (not shown) of the slide of casing 10 inwall, drive division 211 is the first flank that the side of plectrum extends outward, and limiting unit 212 is the second flank that the side of plectrum extends outward, etc., and the interaction relation of itself and other components is realized based on same principle, do not repeat them here.
Referring to Fig. 5 and Fig. 9, the edge controlling element 21 is further opened with notch 213, and the position of adjacent notch 213 is provided with the first flange 214.Second connecting rod 20 is rotatably installed on casing inner wall by bearing pin (figure is not marked), and its one end has hook portion 201 that can be chimeric with notch 213, and the other end is provided with the second flange 202.Second connecting rod 20 is also associated with ordering about it towards controlling the flexible member 203 that element 21 rotates.Flexible member 203 includes multiple implementation, such as, be arranged at the biasing spring between casing 10 inwall and second connecting rod 20, or, such as it is arranged at the torsion spring of the bearing pin position of second connecting rod 20, etc..When being in the normal state, second connecting rod 20 has the trend rotated towards the direction controlling element 21 under the effect of flexible member 203, its hook portion 201 contacts with the first flange 214 controlling element 21, degree of depth bracing frame 16 is deviateed against the second flange 202 making second connecting rod 20 other end due to the first flange 214, now, the degree of depth bracing frame 16 slip in casing 10 can be avoided being disturbed by second connecting rod 20.When being rotated in a first direction control element, the such as counter clockwise direction shown in figure, the hook portion 201 of second connecting rod 20 is chimeric with its notch 213 along the edge controlling element 21, now, start stop lever 18 drives the stroke of limit element 181 limit switch trigger 13, the limiting section 191 of first connecting rod 19 separates with the chute 161 of degree of depth bracing frame 16, control element 21 to be fixed by second connecting rod 20, the hands of operator can be liberated to carry out the replacing of saw blade 12, and due to chimeric, second connecting rod 20 rotates a segment distance towards control element 21 makes the second flange 202 of its other end be offset on the sliding path of degree of depth bracing frame 16.Refer to Fig. 6, when after the replacing completing saw blade 12, operator is by casing 10 and base plate 14 pressing in opposite directions, in degree of depth bracing frame 16 stretches into casing 10 and contact with the second flange 202 of second connecting rod 20, and force second connecting rod 20 to rotate along the direction that its hook portion 201 separates with notch 213, now rotate electrotrephine 1 when controlling element 21 along the second direction contrary with first direction and return to normal.Additionally, control element 21 and also can connect a flexible member 215 ordering about the second direction rotation contrary with first direction of its edge, such as one torsion spring, therefore, when operator is by casing 10 and base plate 14 pressing in opposite directions, control element 21 to automatically reset under the bias of flexible member 215 to its normal orientation, i.e. control first flange 214 position towards the hook portion 201 of second connecting rod 20 of element 21, so to simplify the operational motion of operator.It addition, control element 21 also can connect one and be exposed to the knob (not shown) of casing 10 in normality, can person convenient to operate be rotated by knob control element 21.
When the safeguard protection mode of the electrotrephine 1 of the present invention is particularly as follows: be in the normal state, due to the effect limiting element 181 of start stop lever 18, switch trigger 13 cannot press to start motor 11, it is thereby achieved that the function of switch self-locking.And electrotrephine 1 also has saw blade closing function when normality, casing 10 saw blade 12 also will cannot be made to expose with base plate 14 pressing in opposite directions.When needs carry out operation, first promoting push button 183 to be unlocked, then pressing switch trigger 13 starts motor 11, the saw kerf that then pressing casing 11 makes saw blade 12 stretch out base plate 14 cuts.Cut complete after, loosen the pressing to casing 11 or mention electrotrephine 1, then under the bias of stage clip 15, saw blade 12 separates with the saw kerf of base plate 14, then unclamps push button 183, start stop lever 18 reset thus recover switch self-locking.If operator needs to change saw blade 12, control element 21 is made to be rotated in a first direction the hook portion 201 to second connecting rod 20 and the chimeric position of notch 213 controlling element 21 by knob, separate to change saw blade 12 with casing 10 by base plate 14 again, the now stroke limiting element 181 limit switch trigger 13 all the time of start stop lever 18, also cannot be unlocked by push button 183, thus avoid starting danger produced by motor 11 when changing saw blade 12.After completing the replacing of saw blade 12, operator only needs electrotrephine 1 to be made to return to normal casing 10 and base plate 14 pressing in opposite directions.
Design and the principle of the present invention is simply illustrated by detailed description of the invention described above, does not really wants to limit present disclosure.Those of ordinary skill in the art is it is to be appreciated that in addition to the detailed description of the invention of above-mentioned first-selection, embodiment that is that the present invention also has a lot of other replacement or that revise, that these substitute or amendment embodiment is the most within the scope of the present invention.Protection scope of the present invention is determined by claim.
Claims (7)
1. an electrotrephine, including casing, is installed in the switch trigger of casing, and for limiting the start stop lever of described switch trigger travel；Also include base plate, the degree of depth bracing frame being arranged on base plate, and limit the first connecting rod of described degree of depth bracing frame stroke；It is characterized in that: also include the exercisable control element being arranged in casing, it has for driving the drive division of first connecting rod and controlling the limiting unit of bar for limit switch, described drive division to its displacement with first connecting rod contact surface more than or equal to described limiting unit to its displacement with start stop lever contact surface；Described control element is rotating disk, and described drive division is the first protuberance that the side of rotating disk extends outward, and described limiting unit is the second protuberance that the side of rotating disk extends outward in the front end of drive division in the first direction.
Electrotrephine the most according to claim 1, it is characterised in that: described rotating disk is also associated with being exposed under normal conditions the knob of described casing.
Electrotrephine the most according to claim 1, it is characterised in that: described start stop lever is rotatably installed on casing inner wall by bearing pin；Be provided with between described start stop lever and described switch trigger one can the limit element of limit switch trigger travel scope, drive the work of stroke range controllable switch trigger that limit element disengages switch trigger by rotating of start stop lever；Described start stop lever is provided with and makes start stop lever drive the flexible member limiting element to the reset of switch trigger direction；Described start stop lever is also connected with exposing under a normality push button of casing.
Electrotrephine the most according to claim 3, it is characterised in that: described limit element is the protuberance that described start stop lever extends to described switch trigger direction.
Electrotrephine the most according to claim 1, it is characterised in that: also including saw blade, described base plate with described casing axle even, base plate is provided with and is suitable to the saw kerf that saw blade passes through rotationally；Described start stop lever is provided with the stop part that can contact with described degree of depth bracing frame；The axle of definition base plate and casing even point is the center of circle, and described stop part to its arc angle with degree of depth bracing frame contact surface is less than the arc angle of described saw blade lower end to saw kerf.
Electrotrephine the most according to claim 5, it is characterised in that: described stop part is the protuberance that described start stop lever extends to described degree of depth bracing frame direction.
Electrotrephine the most according to claim 1, it is characterized in that: described degree of depth bracing frame offers chute, described first connecting rod is rotatably installed on described casing inner wall by bearing pin, it has the limiting section that can be contained in described chute to limit degree of depth bracing frame stroke, and orders about its flexible member rotated along the direction that limiting section is chimeric with chute.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034419.4A CN103962630B (en) | 2013-01-30 | 2013-01-30 | Electrotrephine |
| US13/759,230 US9044869B2 (en) | 2012-02-06 | 2013-02-05 | Electric circular saw |
| EP13747293.2A EP2812144B1 (en) | 2012-02-06 | 2013-02-06 | Electric circular saw |
| PCT/CN2013/071444 WO2013117159A1 (en) | 2012-02-06 | 2013-02-06 | Electric circular saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034419.4A CN103962630B (en) | 2013-01-30 | 2013-01-30 | Electrotrephine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103962630A CN103962630A (en) | 2014-08-06 |
| CN103962630B true CN103962630B (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310034419.4A Expired - Fee Related CN103962630B (en) | 2012-02-06 | 2013-01-30 | Electrotrephine |
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| Country | Link |
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| CN (1) | CN103962630B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180885B (en) * | 2015-05-08 | 2018-09-07 | 苏州宝时得电动工具有限公司 | Portable cutter |
| CN105856173B (en) * | 2016-05-13 | 2018-04-10 | 浙江普莱得电器有限公司 | Single switch linkage control device and nail gun |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2722246A (en) * | 1953-05-22 | 1955-11-01 | Arnoldy Leo | Safety guards for power saws |
| US3735489A (en) * | 1971-02-18 | 1973-05-29 | Textron Inc | Hand-held power tool with rotary tool disc at end of reversible forwardly projecting arm |
| CN102245355A (en) * | 2008-12-17 | 2011-11-16 | 博世电动工具（中国）有限公司 | Lock-on switch system for hand drill and hand drill having the same |
| CN102528155A (en) * | 2012-02-06 | 2012-07-04 | 南京德朔实业有限公司 | Electric circular saw provided with switch protection mechanism |
| CN203371115U (en) * | 2013-01-30 | 2014-01-01 | 泉峰(中国)贸易有限公司 | Electric circular saw |
-
2013
- 2013-01-30 CN CN201310034419.4A patent/CN103962630B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2722246A (en) * | 1953-05-22 | 1955-11-01 | Arnoldy Leo | Safety guards for power saws |
| US3735489A (en) * | 1971-02-18 | 1973-05-29 | Textron Inc | Hand-held power tool with rotary tool disc at end of reversible forwardly projecting arm |
| CN102245355A (en) * | 2008-12-17 | 2011-11-16 | 博世电动工具（中国）有限公司 | Lock-on switch system for hand drill and hand drill having the same |
| CN102528155A (en) * | 2012-02-06 | 2012-07-04 | 南京德朔实业有限公司 | Electric circular saw provided with switch protection mechanism |
| CN203371115U (en) * | 2013-01-30 | 2014-01-01 | 泉峰(中国)贸易有限公司 | Electric circular saw |
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| Publication number | Publication date |
|---|---|
| CN103962630A (en) | 2014-08-06 |
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