CN103962630A - Electric circular saw - Google Patents
Electric circular saw Download PDFInfo
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- CN103962630A CN103962630A CN201310034419.4A CN201310034419A CN103962630A CN 103962630 A CN103962630 A CN 103962630A CN 201310034419 A CN201310034419 A CN 201310034419A CN 103962630 A CN103962630 A CN 103962630A
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- electric circular
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- circular saw
- chute
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- 238000006073 displacement reaction Methods 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 239000007858 starting material Substances 0.000 description 5
- 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
- 230000006378 damage Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Abstract
The invention discloses an electric circular saw which comprises a shell, a switch trigger mounted and arranged in the shell, a switch control rod for limiting the travel of the switch trigger, a bottom plate, a depth support frame arranged on the bottom plate, a first connecting rod for limiting the travel of the depth support frame, and a movable control element with a driving part for driving the first connecting rod and a limiting part for limiting the switch control rod, wherein the moving distance between the driving part and the contact surface of the driving part and the first connecting rod is greater than or equal to that between the limiting part and the contact surface of the limiting part and the switch control rod. According to the electric circular saw, the switch protection is performed by a mechanical linkage mode, the electric circular saw is simple and reliable, and the safety accident caused by accidental starting of the electric circular saw can be effectively avoided.
Description
Technical field
The present invention relates to a kind of electric circular saw, particularly a kind of electric circular saw with switch protection.
Background technology
Electric circular saw have can High Rotation Speed saw blade and in order to the switch trigger of starter motor.At non-job state, if saw blade exposes, for the maloperation of switch trigger, great security incident will be caused.Usually, the saw blade of electric circular saw is arranged to movable shield, at job state, along with relatively moving of electric circular saw and workpiece, movable shield will be exposed saw blade gradually with cut workpiece; At non-job state, movable shield covers saw blade under the bias voltage of flexible member, thereby avoids the potential safety hazard of bringing because of maloperation.But still there is such problem, at non-job state, along with relatively moving of electric circular saw and workpiece, saw blade exposes easily surface of the work gouge, affects workpiece attractive in appearance.
In addition, in the time that operator need to change saw blade to electric circular saw, movable shield just cannot provide security protection, need to safety protection mechanism be set to switch trigger, with the security incident of avoiding maloperation starter motor to be caused.Usually, on the main switch of electric circular saw, be in series with microswitch, utilize the break-make of the main switch of the form control electric circular saw of the electric break-make of microswitch, thereby avoid main switch to be misused triggering.But still there is such problem, and if microswitch is short-circuited, its safeguard protection lost efficacy, 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: a kind of electric circular saw with switch protection is provided, in routine operation or in the operation of replacing saw blade, can avoids switch trigger to be misused triggering.
For addressing the above problem, the solution of the present invention is: electric circular saw, comprise casing, and be installed in the switch trigger of casing, and for the start stop lever of limit switch trigger travel; Also comprise base plate, be arranged at the degree of depth bracing frame on base plate, and the first connecting rod of controlling depth bracing frame stroke; It is characterized in that: also comprise the exercisable control element being arranged in casing, it has drive division for driving first connecting rod and the limiting unit for limit switch control lever, and drive division to the displacement of itself and first connecting rod contact-making surface is more than or equal to the displacement of limiting unit to itself and start stop lever contact-making surface.
As a kind of embodiment, control element is rotating disk, the first protuberance that the side that drive division is rotating disk extends outward, and limiting unit is the second protuberance that the side of rotating disk extends outward at the front end of drive division along first direction.
As another kind of embodiment, control element is rotating disk, and drive division is the first arc shaped groove arranging on rotating disk, and limiting unit is the second arc shaped groove arranging on rotating disk, first connecting rod coordinates with the first arc shaped groove by the first spacer pin, and start stop lever coordinates with the second arc shaped groove by the second spacer pin.
Improve as one, rotating disk is also connected with the knob that is exposed under normal conditions casing.
As a kind of embodiment, start stop lever is rotatably installed on casing inner wall by bearing pin; Between start stop lever and switch trigger, be provided with one can limit switch trigger travel scope limit element, drive limit element to throw off the work of the stroke range controllable switch trigger of switch trigger by the rotation of start stop lever; Start stop lever is provided with the flexible member that makes start stop lever drive restriction element to reset to switch trigger direction; Start stop lever also connects the push button that exposes casing under a normality.
Particularly, limit element is the protuberance that start stop lever extends to switch trigger direction.
As a kind of embodiment, electric circular saw also comprises saw blade, and base plate connects with casing axle rotationally, is provided with and is suitable for the saw kerf that saw blade passes through on base plate; 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 connects point for the center of circle, and stop part to the arc angle of itself and degree of depth bracing frame contact-making surface is less than the arc angle of saw blade lower end to saw kerf.
Particularly, 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 can be contained in the limiting section of chute with controlling depth bracing frame stroke, and orders about the flexible member that it rotates along limiting section and the chimeric direction of chute.
As another kind of embodiment, degree of depth bracing frame longitudinally has the first continuous 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 rotates with the equidirectional interlock of start stop lever; 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, extend again the second boss, the transverse width of the second boss can supply to slide in its first chute at degree of depth bracing frame and the second chute, and the transverse width of the first boss can only slide for it in the second chute of degree of depth bracing frame; First connecting rod is also connected with and orders about the flexible member that it rotates along the first boss and the chimeric direction of the second chute; And the distance at the two ends of the first arc shaped groove length that is greater than the first boss is less than the summation of the length of the first boss and the second boss.
Improve as one, also comprise second connecting rod; Rotating disk offers notch, and is provided with the first flange in the position of adjacent notch; 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 connected with and orders about its flexible member towards dial rotation; While being in the normal state, the hook portion of second connecting rod contacts with the first flange; While being rotated in a first direction rotating disk, hook portion and the notch of second connecting rod are chimeric; Casing and base plate are in opposite directions when pressing, and degree of depth bracing frame is oppressed the second flange and the direction that second connecting rod separates with notch along hook portion is rotated.
Particularly, rotating disk is also connected with and orders about the flexible member that it rotates along the second direction contrary with first direction.
Electric circular saw of the present invention can limit the stroke of switch trigger in the operation of routine operation and replacing saw blade, thereby avoids the caused security incident of maloperation.And while being in the normal state, the saw blade of electric circular saw is limited to expose, thereby avoids under non-job state saw blade gouge workpiece or bring injury to operator.In addition, the switch protection structure of electric circular saw adopts mechanical linkage mode to realize, simple and reliable, even if break down also always in restriction state, thereby effectively avoids operator under unwitting state, to carry out the security incident that routine operation occurs.
Brief description of the drawings
Fig. 1 is electric circular saw sectional view under normal conditions.
Fig. 2 is that electric circular saw member under normal conditions coordinates side view.
Fig. 3 is the schematic diagram that coordinates that base plate is opened initial stage rotating disk and first connecting rod.
Fig. 4 is the schematic diagram that coordinates that base plate is opened initial stage rotating disk and start stop lever.
Fig. 5 is the schematic diagram that coordinates that base plate is opened initial stage rotating disk and second connecting rod.
Fig. 6 is the sectional view of electric circular saw in the time changing saw blade.
Fig. 7 is the sectional view under normal conditions of electric circular saw that adopts another kind of rotating disk embodiment.
Fig. 8 adopts the member under normal conditions of electric circular saw of another kind of rotating disk embodiment to coordinate side view.
Fig. 9 is that the member 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 explanation, following " left side ", " right side ", " clockwise ", " counterclockwise " are all consistent with direction shown in the drawings.
As shown in Figure 1, for electric circular saw 1 of the present invention comprises casing 10, in casing 10, be provided with motor 11 and saw blade 12, and motor 11 is connected with saw blade 12 by gearbox assembly (figure is mark not).Be provided with switch trigger 13 in the Handheld Division of casing 10, it can switch on power motor 11 is started.Electric circular saw 1 also comprises base plate 14, and it connects with casing 10 axles rotationally by bearing pin (figure not mark), and between casing 10 and base plate 14, be provided with force the two have mutually away from the stage clip 15 of trend.On base plate 14, being also provided with can be along (figure the is mark not) degree of depth bracing frame 16 of slip of the chute in casing 10 and the movable shield 17 of coated saw blade 12.In addition, on base plate 14, also offer the saw kerf (figure is mark not) that is suitable for saw blade 12 and passes through.
Refer to Fig. 1 and Fig. 2, electric circular saw 1 also comprises 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), between itself and switch trigger 13, be provided with one can limit switch trigger 13 the limit element 181 of stroke range, can drive limit element 181 to throw off the stroke range of switch trigger 13 by the rotation of start stop lever 18, controllable switch trigger 13 is worked afterwards.Particularly, switch trigger 13 has one section towards the direction of the Handheld Division of casing 10 and presses stroke, and limit element 181 extends towards the direction of switch trigger 13 from start stop lever 10, and limit element 181 can be a protuberance, it can stop pressing of switch trigger 13, thus restriction power connection.Wherein, limit element 181 also comprises other implementations, for example, it can comprise the breach that is arranged on start stop lever 18 and the switch trigger 13 extended protuberance of direction towards start stop lever 18, or it can comprise start stop lever 18 and the extended in opposite directions protuberance of switch trigger 13, etc.Start stop lever 18 is also provided with and makes its flexible member 182 that drives limit element 181 to reset towards switch trigger 13 directions, and therefore, under normal conditions, because limit element 181 has limited the stroke range of switch trigger 13, electric circular saw 1 can not start.Flexible member 182 comprises multiple implementation, for example, is arranged at the biasing spring between casing 10 inwalls and start stop lever 18, or, be arranged on the torsion spring of the bearing pin position of start stop lever 18, etc.Start stop lever 18 is also connected with a push button 183 that exposes under normal conditions casing 10, therefore, operator can make start stop lever 18 rotate around bearing pin by promoting push button 183, and drive limit element 181 to throw off the stroke range of switch trigger 13, now, can start electric circular saw 1 by push switch trigger 13.Start stop lever 18 is also provided with the stop part 184 that can contact with degree of depth bracing frame 16, for example a protuberance that extend to the direction of degree of depth bracing frame 16 lower end along start stop lever 18.The axle of definition base plate 14 and casing 10 connects point for the center of circle, and stop part 184 to the arc angle of the contact-making surface of itself and degree of depth bracing frame 16 is less than the lower end of saw blade 12 to the arc angle of saw kerf.Therefore, under normal conditions, when operator is resisted against base plate 14 on workpiece and while pressing casing 10, 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, thereby avoids the direct gouge workpiece of saw blade 12.
Electric circular saw 1 also comprises the first connecting rod 19 being arranged in casing 10, in addition, offers 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 not mark), and its front end is provided with and can be contained in the limiting section 191 of chute 161 with limited depth bracing frame stroke, for example, along the lower end extended hook portion forward of first connecting rod 19.First connecting rod 19 is also connected with and orders about the flexible member 192 that it rotates along the chimeric direction of limiting section 191 and chute 161, therefore, under normal conditions, thereby degree of depth bracing frame 16 is along the depth of cut of the chute slip adjustable saw blade 12 in casing 10 under the restriction of limiting section 191, and base plate 14 is limited in the length range of chute 161 around the slewing area of bearing pin and casing 10.
Refer to Fig. 3 and Fig. 4, electric circular saw 1 also comprises movably control element 21, it has drive division 211 for driving first connecting rod 19 and the limiting unit 212 for limit switch control lever 18, and drive division 211 to the displacement of itself and first connecting rod 19 contact-making surfaces is more than or equal to the displacement of limiting unit 212 to itself and start stop lever 18 contact-making surfaces.For example, control element 21 can be a rotating disk that is rotatably installed on casing 10 inwalls by bearing pin, drive division 211 is first protuberances that the side of rotating disk extends outward, and limiting unit 212 is second protuberances that the side of rotating disk extends outward at the front end of drive division along 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, example counter clockwise direction as shown in FIG., drive division 211 will be oppressed protuberance 193, and the direction that first connecting rod 19 separates with chute 161 along limiting section 191 is rotated, 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, and pivotable sole plate 14 to degree of depth bracing frame 16 departs from casing 10 completely, thereby exposes saw blade 12, now, operator can change saw blade 12.Because drive division 211 to the displacement of itself and first connecting rod 19 contact-making surfaces is more than or equal to the displacement of limiting unit 212 to itself and start stop lever 18 contact-making surfaces, thereby, when drive division 211 is oppressed protuberance 193, limiting unit 212 will be oppressed the body of rod of start stop lever 18, and limits its direction departing from along limit element 181 and switch trigger 13 and rotate.Now, limit element 181 is by the stroke of limit switch trigger 13,, in the time that operator changes saw blade 12, even when exposing to the push button 183 of casing 10 and being subject to pushing, start stop lever 18 also cannot rotate, therefore, switch trigger 13 cannot be pressed all the time, and while having avoided replacing saw blade 12, electric circular saw 1 is by error starting.
Refer to Fig. 7 and Fig. 9, the control element 21 based on disk also has another kind of embodiment.Particularly, first arc shaped groove of drive division 211 for arranging on rotating disk, described limiting unit 212 is second arc shaped grooves that arrange on rotating disk, described first connecting rod 19 coordinates with described the first arc shaped groove by the first spacer pin (figure is mark not), and described start stop lever 18 coordinates with described the second arc shaped groove by the second spacer pin (figure is mark not).As corresponding change, now, start stop lever 18 does not arrange aforesaid stop part 184; The transverse width that longitudinally has the first continuous chute 162 and the second chute 163, the first chutes 162 from bottom to top along it on degree of depth bracing frame 16 is less than the transverse width of the second chute 163; First connecting rod 19 does not arrange 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 be in the first chute 162 of degree of depth bracing frame 16 and the interior slip of the second chute 163, and the first boss 194 can only be in the interior slip of the second chute 163 of degree of depth bracing frame 16.That is, the coboundary of the second chute 163 (figure is mark not) and lower boundary (figure is mark not) have limited 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 mark not) has limited the sliding scale of the second boss 195.Refer to Fig. 8, based on such structure, while being in the normal state, under the effect of flexible member 192, in the first restriction of boss 194 in the second chute 163 of first connecting rod 19, 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, thereby avoids exposing at non-job state saw blade 12 situation of caused gouge workpiece.First connecting rod 19 is also coordinated with the body of rod of start stop lever 18 and is formed interlock by the hook (figure is mark not) extending laterally out.Based on such structure, in the time that needs carry out operation, promoting push button 183 rotates start stop lever 18, the distance of the movement of the first connecting rod 19 of interlock only can make the first boss 194 depart from the second chute 164 of degree of depth bracing frame 16 thereupon, and the second boss 195 is still in the first chute 162 of degree of depth bracing frame 16 and the scope of the second chute 163, base plate 14 can slide up and down in the restriction of the second boss 195., the distance at the two ends, left and right of the drive division 211 of the first arc shaped groove is configured to be greater than the length of the first boss 194 and the summation that is less than the length of the first boss 194 and the second boss 195.In addition, in the time that operator need to change saw blade, control element 21 is rotated in a first direction, the drive division 211 of the first arc shaped groove forces the direction that first connecting rod 19 departs from along the second boss 195 and the second chute 163 to be rotated by the first spacer pin, thereby make degree of depth bracing frame 16 depart from the restriction of first connecting rod 19, now, pivotable sole plate 14 to degree of depth bracing frame 16 departs from casing 10 completely to expose saw blade 12.Because drive division 211 to the displacement of itself and first connecting rod 19 contact-making surfaces is more than or equal to the displacement of limiting unit 212 to itself and start stop lever 18 contact-making surfaces, thereby, when 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 is passed through the second spacer pin against start stop lever 18, and limits its direction departing from along limit element 181 and switch trigger 13 and rotate.Now, limit element 181 is the stroke of limit switch trigger 13 still, is pushed even if expose to the push button 183 of casing 10, and start stop lever 18 also cannot rotate, and therefore, can avoid changing saw blade 12 like this time, electric circular saw 1 be by error starting.
In addition, those of ordinary skill in the art can recognize other replacement structures of control element 21, for example, control element 21 can also be the plectrum (not shown) that can slide along the chute of casing 10 inwalls, drive division 211 is first flanks that the side of plectrum extends outward, and limiting unit 212 is second flanks that the side of plectrum extends outward, etc., and realize the interaction relation of itself and other member based on same principle, do not repeat them here.
Refer to Fig. 5 and Fig. 9, the edge of control element 21 also offers notch 213, and is provided with the first flange 214 in the position of adjacent notch 213.Second connecting rod 20 is rotatably installed on casing inner wall by bearing pin (figure is mark not), 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 connected with and orders about the flexible member 203 that it rotates towards control element 21.Flexible member 203 comprises multiple implementation, for example, be arranged at the biasing spring between casing 10 inwalls and second connecting rod 20, or, be for example arranged at the torsion spring of the bearing pin position of second connecting rod 20, etc.While being in the normal state, second connecting rod 20 has the trend of rotating towards the direction of control element 21 under the effect of flexible member 203, its hook portion 201 contacts with the first flange 214 of control element 21, because second flange 202 against making second connecting rod 20 other ends of the first flange 214 departs from degree of depth bracing frame 16, now, the slip of degree of depth bracing frame 16 in casing 10 can be avoided being disturbed by second connecting rod 20.While being rotated in a first direction control element, example counter clockwise direction as shown in FIG., the hook portion 201 of second connecting rod 20 is chimeric along edge and its notch 213 of control element 21, now, start stop lever 18 drives the stroke of limit element 181 limit switch triggers 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 is fixed by second connecting rod 20, can liberate operator's hand 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 is offset on the sliding path of degree of depth bracing frame 16 the second flange 202 of its other end.Refer to Fig. 6, when completing after the replacing of saw blade 12, operator is by casing 10 and base plate 14 pressing in opposite directions, degree of depth bracing frame 16 stretches in casing 10 and contacts with the second flange 202 of second connecting rod 20, and force the direction that second connecting rod 20 separates with notch 213 along its hook portion 201 to be rotated, while now getting final product along the second direction rotation control element 21 contrary with first direction, electric circular saw 1 returns to normal.In addition, control element 21 also can connect one orders about the flexible member 215 that it rotates along the second direction contrary with first direction, a for example torsion spring, therefore, when operator is by casing 10 and base plate 14 in opposite directions when pressing, control element 21 can automatically reset to normality position under the bias voltage of flexible member 215, and the first flange 214 of control element 21 is towards the position of the hook portion 201 of second connecting rod 20, like this by the person's of simplifying the operation operational motion.In addition, control element 21 also can connect one and be exposed to the knob (not shown) of casing 10 in normality, can convenient operation person rotate by knob control control element 21.
The safeguard protection mode of electric circular saw 1 of the present invention is specially: while being in the normal state, due to the effect of the limiting element 181 of start stop lever 18, switch trigger 13 cannot be pressed with starter motor 11, therefore, can realize the function of switch self-locking.And electric circular saw 1 also has saw blade closing function in the time of normality, by casing 10 and base plate 14 in opposite directions pressing also cannot make saw blade 12 expose.In the time that needs carry out operation, first promote push button 183 and carry out release, then push switch trigger 13 starter motors 11, then press the saw kerf that casing 11 makes saw blade 12 stretch out base plate 14 and cut.Cut complete after, loosen the pressing or mention electric circular saw 1 of casing 11, under the bias voltage of stage clip 15, saw blade 12 separates with the saw kerf of base plate 14, then unclamps push button 183, thereby start stop lever 18 resets and recovers switch self-locking.If when operator need to change saw blade 12, make control element 21 be rotated in a first direction the position chimeric with the notch 213 of control element 21 to the hook portion 201 of second connecting rod 20 by knob, again base plate 14 is separated to change saw blade 12 with casing 10, the now limiting element 181 of start stop lever 18 stroke of limit switch trigger 13 all the time, also cannot carry out release by push button 183, thereby avoid the danger that starter motor 11 produces in the time changing saw blade 12.Complete after the replacing of saw blade 12, operator only need by casing 10 and base plate 14 in opposite directions pressing can make electric circular saw 1 return to normal.
Detailed description of the invention described above is just set forth design of the present invention and principle, does not really want content of the present invention to limit.Those of ordinary skill in the art can recognize, except the detailed description of the invention of above-mentioned first-selection, the present invention also has a lot of other embodiments that substitute or amendment, and embodiment that these substitute or amendment still within the scope of the present invention.Protection scope of the present invention is determined by claim.
Claims (12)
1. an electric circular saw, comprises casing, is installed in the switch trigger of casing, and for limiting the start stop lever of described switch trigger travel; Also comprise base plate, be arranged at the degree of depth bracing frame on base plate, and limit the first connecting rod of described degree of depth bracing frame stroke; It is characterized in that: also comprise the exercisable control element being arranged in casing, it has drive division for driving first connecting rod and the limiting unit for limit switch control lever, and described drive division to the displacement of itself and first connecting rod contact-making surface is more than or equal to the displacement of described limiting unit to itself and start stop lever contact-making surface.
2. electric circular saw according to claim 1, it is characterized in that: described control element is rotating disk, 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 at the front end of drive division along first direction.
3. electric circular saw according to claim 1, it is characterized in that: described control element is rotating disk, described drive division is the first arc shaped groove arranging on rotating disk, described limiting unit is the second arc shaped groove arranging on rotating disk, described first connecting rod coordinates with described the first arc shaped groove by the first spacer pin, and described start stop lever coordinates with described the second arc shaped groove by the second spacer pin.
4. according to the electric circular saw described in claim 2 or 3, it is characterized in that: described rotating disk is also connected with the knob that is exposed under normal conditions described casing.
5. according to the electric circular saw described in claim 2 or 3, it is characterized in that: described start stop lever is rotatably installed on casing inner wall by bearing pin; Between described start stop lever and described switch trigger, be provided with one can limit switch trigger travel scope limit element, drive limit element to throw off the work of the stroke range controllable switch trigger of switch trigger by the rotation of start stop lever; Described start stop lever is provided with the flexible member that makes start stop lever drive restriction element to reset to switch trigger direction; Described start stop lever also connects the push button that exposes casing under a normality.
6. electric circular saw according to claim 5, is characterized in that: described limit element is the protuberance that described start stop lever extends to described switch trigger direction.
7. electric circular saw according to claim 2, is characterized in that: also comprise saw blade, described base plate connects with described casing axle rotationally, is provided with and is suitable for the saw kerf that saw blade passes through on base plate; 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 connects point for the center of circle, and described stop part to the arc angle of itself and degree of depth bracing frame contact-making surface is less than the arc angle of described saw blade lower end to saw kerf.
8. electric circular saw according to claim 7, is characterized in that: described stop part is the protuberance that described start stop lever extends to described degree of depth support member direction.
9. electric circular saw according to claim 2, 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 can be contained in the limiting section of described chute with controlling depth bracing frame stroke, and orders about the flexible member that it rotates along limiting section and the chimeric direction of chute.
10. electric circular saw according to claim 3, is characterized in that: described degree of depth bracing frame longitudinally has the first continuous 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; Described first connecting rod is installed in rotation on casing inner wall by bearing pin and rotates with the equidirectional interlock of described start stop lever; The first boss is extended to the direction of degree of depth bracing frame in the lower end of described first connecting rod, and on the first boss, extend again the second boss, the transverse width of described the second boss can supply to slide in its first chute at degree of depth bracing frame and the second chute, and the transverse width of described the first boss can only slide for it in the second chute of degree of depth bracing frame; Described first connecting rod is also connected with and orders about the flexible member that it rotates along the first boss and the chimeric direction of the second chute; And the distance at the two ends of described the first arc shaped groove length that is greater than the first boss is less than the summation of the length of the first boss and the second boss.
11. according to the electric circular saw described in claim 2 or 3, it is characterized in that: also comprise second connecting rod; Described rotating disk offers notch, and is provided with the first flange in the position of adjacent notch; Described second connecting rod is rotatably installed on described casing inner wall by bearing pin, and its one end has hook portion that can be chimeric with described notch, and its other end is provided with the second flange, and described second connecting rod is also connected with and orders about its flexible member towards described dial rotation; While being in the normal state, the hook portion of described second connecting rod contacts with described the first flange; While being rotated in a first direction rotating disk, the hook portion of described second connecting rod and described notch are chimeric; Described casing and described base plate are in opposite directions when pressing, and described degree of depth bracing frame is oppressed described the second flange and the direction that second connecting rod separates with described notch along described hook portion is rotated.
12. electric circular saws according to claim 11, is characterized in that: described rotating disk is also connected with and orders about the flexible member that it rotates along the second direction contrary with first direction.
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 |
| PCT/CN2013/071444 WO2013117159A1 (en) | 2012-02-06 | 2013-02-06 | Electric circular saw |
| EP13747293.2A EP2812144B1 (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 |
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| Publication Number | Publication Date |
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| CN103962630A true CN103962630A (en) | 2014-08-06 |
| CN103962630B CN103962630B (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310034419.4A Expired - Fee Related CN103962630B (en) | 2012-02-06 | 2013-01-30 | Electrotrephine |
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| CN (1) | CN103962630B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856173A (en) * | 2016-05-13 | 2016-08-17 | 浙江普莱得电器有限公司 | Single-switch linkage control device and nail gun |
| CN106180885A (en) * | 2015-05-08 | 2016-12-07 | 苏州宝时得电动工具有限公司 | Portable cutter |
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| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180885A (en) * | 2015-05-08 | 2016-12-07 | 苏州宝时得电动工具有限公司 | Portable cutter |
| CN106180885B (en) * | 2015-05-08 | 2018-09-07 | 苏州宝时得电动工具有限公司 | Portable cutter |
| CN105856173A (en) * | 2016-05-13 | 2016-08-17 | 浙江普莱得电器有限公司 | Single-switch linkage control device and nail gun |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103962630B (en) | 2016-08-03 |
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