CN104874859A - Electric circular saw - Google Patents
Electric circular saw Download PDFInfo
- Publication number
- CN104874859A CN104874859A CN201410072787.2A CN201410072787A CN104874859A CN 104874859 A CN104874859 A CN 104874859A CN 201410072787 A CN201410072787 A CN 201410072787A CN 104874859 A CN104874859 A CN 104874859A
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- Prior art keywords
- switch
- contact surface
- circular saw
- electric circular
- securing rod
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Abstract
The invention discloses an electric circular saw. The electric circular saw comprises a casing, a driving motor, a driving switch used for controlling the driving motor, and a switch protection mechanism. The switch protection mechanism comprises a switch trigger pivoted on the casing, a locking lever abutting against the switch trigger, and a switch lever in contact with the locking lever. When the switch trigger is pressed to rotate, the locking lever abutting against the switch trigger moves, so that the locking lever releases the lock on the switch lever. Meanwhile, the switch lever is pressed, and the switch lever abuts against the driving switch and drives a saw blade to work. The driving motor is switched on through steps of releasing the lock on the switch lever and then pressing the switch lever, so that a phenomenon that human bodies are injured by the saw blade due to accident triggering can be avoided. Furthermore, the switch protection mechanism can control the on/off of the driving motor just by two times of simple pressing. Compared with the prior art, the electric circular saw not only has a safety protection function, but also can improve man-machine usage effects of the electric circular saw.
Description
Technical field
The present invention relates to electric-powered field of tool, particularly relate to a kind of electric circular saw.
Background technology
Electric circular saw can damage human body under saw blade High Rotation Speed; in order to avoid the generation of injury; industry proposes the safety shield being outside equipped with mobilizable guard shield at the saw blade of electric circular saw; this structure can make saw blade can not expose in a free state, also would not damage human body.But prior art adopts artificial fixed form to be fixed movable shield, be that dismounting movable shield or installation movable shield are all very inconvenient.
Another safety approach, is namely in series with microswitch on the switch of electric circular saw, is used for controlling the break-make of motor on electric circular saw, thus avoids due to unexpected triggering and saw blade is damaged human body with this.The microswitch that current industry uses in use needs repeatedly action or multiple step can run the break-make of motor, and the man-machine result of use that this operator of these loaded down with trivial details actions brings is poor.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of and can improve man-machine result of use and there is the electric circular saw of safety protection function.
A kind of electric circular saw, comprising casing, being arranged on the drive motors of described casing internal, the saw blade driven by described drive motors and the driving switch for controlling described drive motors; Described electric circular saw also comprises the switch protection mechanism that can control described driving switch break-make, the securing rod that described switch protection mechanism comprises pivotable switch trigger on the housing, abuts against with described switch trigger, and by the switch lever being used for pressing described driving switch that described securing rod locks; Described switch lever can be automatically connected on described casing, is provided with the receiving space for accommodating described securing rod in described casing, described securing rod can movement be arranged in described receiving space; When pressing described switch trigger movement, described switch spanner machine can drive described securing rod to move and remove the locking to described switch lever.
Wherein in an embodiment, described switch trigger is provided with the first contact surface, described securing rod is provided with the second contact surface and the 3rd contact surface, described first contact surface and described second contact surface be oblique to abut and can relative motion under the effect of described switch trigger pressing force, the 5th contact surface that described switch lever is provided with four contact surface relative with described 3rd contact surface and can be connected on described driving switch.
Wherein in an embodiment, described first contact surface and/or described second contact surface are inclined-plane or cam surface.
Wherein in an embodiment, described switch trigger is provided with the first projection, and described first contact surface is formed in described first projection.
Wherein in an embodiment, described securing rod has the main part be housed in described receiving space, it is protruding and the 3rd protruding to be extended on second on described main part, described second contact surface is formed in described second projection, and described 3rd contact surface is formed in described 3rd projection.
Wherein in an embodiment, described switch lever is provided with the first dividing plate extending to described securing rod, described switch trigger be provided with first flexible member parallel with described main part between described dividing plate.
Wherein in an embodiment, described switch lever is provided with the first dividing plate, and described securing rod is provided with the second partition relative with described first dividing plate, described first dividing plate be provided with first flexible member parallel with described main part between described second partition.
Wherein in an embodiment, between described switch trigger and securing rod, be provided with the second flexible member, between described switch lever and securing rod, be provided with the 3rd flexible member.
Wherein in an embodiment, described switch lever is provided with the 4th projection, and described 4th contact surface is formed in described 4th projection.
Wherein in an embodiment, one end and the described casing of described switch lever are rotationally connected, and the other end of described switch lever is extended with support platform, and described 5th contact surface is formed in described support platform.
Above-mentioned electric circular saw comprises the switch protection mechanism that can control driving switch break-make; when pressing switch trigger rotation; the securing rod abutted against with switch trigger moves; and reserve the space that switch lever can be made along the movement of driving switch direction; thus make the locking of securing rod releasing to switch lever; now press switch lever, switch lever to be connected on driving switch and to drive saw blade to operate.The conducting of drive motors needs the locking of first cancel switch bar to press switch lever again, thus can avoid due to unexpected triggering and saw blade is damaged human body.In addition, above-mentioned switch protection mechanism only needs twice simple press namely can control the break-make of drive motors, and its prior art of comparing can also improve the man-machine result of use of electric circular saw while having safety protection function.
Accompanying drawing explanation
Fig. 1 is electric circular saw main sectional view in a non-operative state;
Fig. 2 is the partial structurtes enlarged drawing at Figure 1A place;
Fig. 3 be electric circular saw in working order under main sectional view;
Fig. 4 is the partial structurtes enlarged drawing at Fig. 3 B place.
Wherein, concrete element reference numeral is listed as follows:
100, electric circular saw 110, casing 111, switch pin
120, drive motors 130, saw blade 140, driving switch
150, switch trigger 151, first contact surface 152, first is protruding
160, securing rod 161, main part 162, second contact surface
163, the 3rd contact surface 164, second projection 165, the 3rd projection
166, second partition 170, switch lever 171, the 4th contact surface
172, the 5th contact surface 173, the 4th projection 174, support platform
175, the first dividing plate 181, first flexible member 182, second flexible member
183, the 3rd flexible member
Detailed description of the invention
(illustrate: " front " described in present embodiment refers to towards the direction of saw blade, and described " rear " refers to the direction contrary with saw blade.）
Please refer to the drawing 1, present embodiment discloses a kind of electric circular saw 100, this electric circular saw 100 comprises casing 110, the drive motors 120 being arranged on casing 110 inside, the saw blade 130 driven by drive motors 120 and the driving switch 140 for controlling drive motors 120, wherein, be electrically connected between driving switch 140 and drive motors 120.In use procedure, pressing driving switch 140 also drives drive motors 120 to operate, and then drives saw blade 130 rotate and carry out cutwork.
Please refer to the drawing 2, electric circular saw 100 also comprises the switch protection mechanism that can control driving switch 140 break-make.Electric circular saw 100 has duty and off working state: when electric circular saw 100 is in running order, and pressed by external force is in switch protection mechanism and drive driving switch 140, and driving switch 140 drives saw blade 130 to rotate; When electric circular saw 100 is in off working state, remove the pressing active force to switch protection mechanism, be now electrically connected between driving switch 140 and drive motors 120 and disconnect, saw blade 130 remains static.Wherein, switch protection mechanism comprise can the switch trigger 150 of pivotable on casing 110, the securing rod 160 contacted with switch trigger 150 and the switch lever 170 abutted against with securing rod 160.Driving switch 140 is provided with the salient point 141 that can contact with switch lever 170.Casing 110 inside is provided with the receiving space for accommodating securing rod 160, and it is inner that securing rod 160 is movably arranged on above-mentioned receiving space.In present embodiment, securing rod 160 can move forward and backward in receiving space.
Casing 110 is provided with switch pin 111, one end of switch trigger 150 and one end of switch lever 170 respectively relative to above-mentioned switch pin 111 pivotable on casing 110.It is pointed out that in other embodiments, switch trigger 150 and the pivoting action of switch lever 170 on casing 110 can also be realized in other manners, be not specifically limited herein.
Switch trigger 150 is provided with the first contact surface 151, securing rod 160 is provided with the second contact surface 162 and the 3rd contact surface 163, first contact surface 151 abuts with the second contact surface 162 is oblique, the 5th contact surface 172 that switch lever 170 is provided with four contact surface 171 relative with the 3rd contact surface 163 and can be connected on driving switch 140.
When electric circular saw 100 is in off working state, even if there is external force to order about switch lever 170 when rotating, because the 4th contact surface 171 is connected on the 3rd contact surface 163 under the revolving force effect of switch lever 170, thus switch lever 170 can be hindered to continue to move to the direction of driving switch 140.
Please refer to the drawing 3 and Fig. 4, when external force order about switch trigger 150 rotate time, produce relative motion between the second contact surface 162 and the first contact surface 151, this motion can drive securing rod 160 to move forward.Meanwhile, relative 4th contact surface 171 of the 3rd contact surface 163 moves forward, and giving switch lever 170, reserve can along the space of the direction movement of driving switch 140, and the locking to switch lever 170 removed by securing rod 160.If pressing switch lever 170, switch lever 170 can be connected on driving switch 140, and drives saw blade 130 to rotate.Now, electric circular saw 100 is in running order.
In order to make the relative motion between switch trigger 150 and securing rod 160 more smooth and easy, first contact surface 151 is lower in the mutual surface roughness located that abuts with the second contact surface 162, and the first contact surface 151 can, for the inclined-plane mutually abutted, also can be cam surface with the second contact surface 162.It is pointed out that in other embodiments, the shape of the first contact surface 151 and the second contact surface 162 is not specifically limited, as long as can meet the function that can make to produce relative motion between switch trigger 150 and securing rod 160.In present embodiment, the 3rd contact surface 163 and the 4th contact surface 171 are plane.
Please refer to the drawing 2 and Fig. 4, the switch trigger 150 in present embodiment is provided with the first projection 152, first contact surface 151 and is formed in the first projection 152.Securing rod 160 has main part 161, be extended on second on main part 161 protruding 164 and the 3rd projection 165, second contact surface 162 is formed in the second projection 164, and the 3rd contact surface 163 is formed in the 3rd projection 165.Switch lever 170 is provided with the 4th projection the 173, four contact surface 171 and is formed in the 4th projection 173.The edge of the 3rd projection 165 and the smooth of the edge transition of the 4th projection 173.Thus making switch lever 170 when being subject to pressing effect, the 4th projection 173 can not produce and interfering with the 3rd protruding 165 in the direction moving process of switch lever 170.One end and the casing 110 of switch lever 170 are rotationally connected, and its other end is extended with support platform 174, and namely the 5th contact surface 172 is formed in above-mentioned support platform 174.
Switch lever 170 is provided with the first dividing plate 175, and securing rod 160 is provided with second partition 166, first dividing plate 175 relative with the first dividing plate 170 and is provided with first flexible member 181 parallel with main part 161 between second partition 166.It is to be noted, in other embodiments, securing rod 160 can also be provided with through hole, and switch lever 170 is provided with the first dividing plate 175 extending to above-mentioned through hole, the sidewall of through hole be provided with first flexible member 181 parallel with main part 161 between dividing plate 175.In addition, be provided with the second flexible member 182 between switch trigger 150 and securing rod 160, between switch lever 170 and securing rod 160, be provided with the 3rd flexible member 183.In present embodiment, the first flexible member 181, second flexible member 182 and the 3rd flexible member 183 are spring part.Switch trigger 150, securing rod 160 and switch lever 170 can be reset to respective original state under can guaranteeing the state removed in external force by the first flexible member 181, second flexible member 182 and the 3rd flexible member 183.
Above-mentioned electric circular saw 100 in use, first hand is pushed against on switch trigger 150, and make securing rod 160 move to the direction of saw blade 130 under the rotary motion power of switch trigger 150 and be unlocked by switch lever 170, now press switch lever 170 and make it abut with driving switch 140, driving switch 140 is opened and is driven saw blade 130 to carry out cutwork.Now, switch trigger 150 resets under the elasticity restoring force of the second flexible member 182, and Continued depression switch lever 170 can ensure the persistent movement of saw blade 130.When saw blade 130 need shut down, remove the active force be applied on switch lever 170, under the elasticity restoring force of the 3rd flexible member 183, switch lever 170 resets and makes the force ceases between itself and driving switch 140, now, securing rod 160 resets under the elasticity restoring force of the first flexible member 181, and then makes electric circular saw 100 be in off working state.
It may be noted that time, the driving switch 140 adopted in present embodiment is the structure of Continued depression generation power drives, in other embodiments, the power drives structure that namely driving switch 140 produces for single depression, the mode of operation of its relative switch lever 170 is also slightly different.
Present embodiment is provided with switch protection mechanism on the driving switch of electric circular saw; thus make during drive motors conducting, to need the locking of first cancel switch bar to press switch lever again, this structure can avoid the accident due to electric circular saw trigger and saw blade is damaged human body.In addition, above-mentioned switch protection mechanism only needs twice simple press namely can control the break-make of drive motors, and its prior art of comparing can also improve the man-machine result of use of electric circular saw while having safety protection function.
It is to be noted; switch protection mechanism described in present embodiment not only goes in electric circular saw structure; but also go in the electric tool of other cutting classes such as electric angle grinder; as long as twice simple press can be reached through namely can improve man-machine result of use, there is again the effect of safety protection function all within the protection domain of this patent.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an electric circular saw, comprising casing, being arranged on the drive motors of described casing internal, the saw blade driven by described drive motors and the driving switch for controlling described drive motors; It is characterized in that: described electric circular saw also comprises the switch protection mechanism that can control described driving switch break-make, the securing rod that described switch protection mechanism comprises pivotable switch trigger on the housing, abuts against with described switch trigger, and by the switch lever being used for pressing described driving switch that described securing rod locks; Described switch lever can be automatically connected on described casing, is provided with the receiving space for accommodating described securing rod in described casing, described securing rod can movement be arranged in described receiving space; When pressing described switch trigger movement, described switch spanner machine can drive described securing rod to move and remove the locking to described switch lever.
2. electric circular saw according to claim 1, it is characterized in that, described switch trigger is provided with the first contact surface, described securing rod is provided with the second contact surface and the 3rd contact surface, described first contact surface and described second contact surface be oblique to abut and can relative motion under the effect of described switch trigger pressing force, the 5th contact surface that described switch lever is provided with four contact surface relative with described 3rd contact surface and can be connected on described driving switch.
3. electric circular saw according to claim 2, is characterized in that, described first contact surface and/or described second contact surface are inclined-plane or cam surface.
4. electric circular saw according to claim 2, is characterized in that, described switch trigger is provided with the first projection, and described first contact surface is formed in described first projection.
5. the electric circular saw according to any one of claim 2 to 4, it is characterized in that, described securing rod has the main part be housed in described receiving space, it is protruding and the 3rd protruding to be extended on second on described main part, described second contact surface is formed in described second projection, and described 3rd contact surface is formed in described 3rd projection.
6. electric circular saw according to claim 5, is characterized in that, described switch lever is provided with the first dividing plate extending to described securing rod, described switch trigger be provided with first flexible member parallel with described main part between described dividing plate.
7. electric circular saw according to claim 5, it is characterized in that, described switch lever is provided with the first dividing plate, and described securing rod is provided with the second partition relative with described first dividing plate, described first dividing plate be provided with first flexible member parallel with described main part between described second partition.
8. electric circular saw according to claim 2, is characterized in that, is provided with the second flexible member between described switch trigger and securing rod, is provided with the 3rd flexible member between described switch lever and securing rod.
9. electric circular saw according to claim 2, is characterized in that, described switch lever is provided with the 4th projection, and described 4th contact surface is formed in described 4th projection.
10. electric circular saw according to claim 2, is characterized in that, one end and the described casing of described switch lever are rotationally connected, and the other end of described switch lever is extended with support platform, and described 5th contact surface is formed in described support platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410072787.2A CN104874859B (en) | 2014-02-28 | 2014-02-28 | Electric circular saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410072787.2A CN104874859B (en) | 2014-02-28 | 2014-02-28 | Electric circular saw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104874859A true CN104874859A (en) | 2015-09-02 |
| CN104874859B CN104874859B (en) | 2017-06-27 |
Family
ID=53942679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410072787.2A Active CN104874859B (en) | 2014-02-28 | 2014-02-28 | Electric circular saw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104874859B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808017A (en) * | 2015-12-01 | 2017-06-09 | 苏州宝时得电动工具有限公司 | Electric circular saw and electric circular saw control method |
| CN107042334A (en) * | 2017-05-02 | 2017-08-15 | 宁波天和电动工具有限公司 | A kind of electric circular saw with switch protection mechanism |
| CN108115190A (en) * | 2017-05-31 | 2018-06-05 | 南宁盛世凌云电子科技有限公司 | A kind of improved bridge maintained equipment |
| CN111215694A (en) * | 2019-10-28 | 2020-06-02 | 张家港市创基机械设备制造有限公司 | Safety device for electric saw |
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| CN202479602U (en) * | 2012-02-06 | 2012-10-10 | 南京德朔实业有限公司 | Electric circular saw with switch protecting mechanism |
| CN203397963U (en) * | 2013-07-23 | 2014-01-15 | 宁波卡伦特电器有限公司 | Switching device of angle grinder |
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| US4589208A (en) * | 1983-08-13 | 1986-05-20 | Matsushita Electric Works, Ltd. | Portable electric circular saw |
| US5755147A (en) * | 1992-06-30 | 1998-05-26 | Tsune Seiki Co., Ltd. | Circular saw |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808017A (en) * | 2015-12-01 | 2017-06-09 | 苏州宝时得电动工具有限公司 | Electric circular saw and electric circular saw control method |
| CN106808017B (en) * | 2015-12-01 | 2019-07-30 | 苏州宝时得电动工具有限公司 | Electric circular saw and electric circular saw control method |
| CN107042334A (en) * | 2017-05-02 | 2017-08-15 | 宁波天和电动工具有限公司 | A kind of electric circular saw with switch protection mechanism |
| CN108115190A (en) * | 2017-05-31 | 2018-06-05 | 南宁盛世凌云电子科技有限公司 | A kind of improved bridge maintained equipment |
| CN111215694A (en) * | 2019-10-28 | 2020-06-02 | 张家港市创基机械设备制造有限公司 | Safety device for electric saw |
Also Published As
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|---|---|
| CN104874859B (en) | 2017-06-27 |
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