CN204053725U - Power tool - Google Patents

Abstract

The utility model provides a kind of power tool, comprise housing, it is characterized in that: rotatable switch latch is installed on action bars and is positioned at this gap, switch latch is provided with the first holding section, the opposite side of switch latch is provided with locating part, in the part of the first holding section, support portion is provided with inside action bars, left push button and right push button is equipped with respectively in the left and right sides of housing holding end, left push button and the first groove of right push button and the cell wall of the second groove are respectively equipped with one second holding section, on the side of the second holding section, the 3rd holding section of matching with the second holding section is respectively equipped with in the first extension and the second extension.In a kind of power tool that the utility model provides, avoid the generation of maloperation to the full extent, meanwhile, reduce homework burden, improve operating efficiency, and avoid CD-ROM drive motor and occurred by the situation that mistake stops.And the utility model makes no matter to be that left-handed person or right-handed person can both operate very smoothly.

Description

Power tool

Technical field

The utility model relates to a kind of portable electric angle grinder, for carrying out grinding or grinding operation to work piece.

Background technology

Conventional electric angle grinder generally includes a housing, one is provided with for carrying out the operation part of grinding or grinding to workpiece at the head of housing, the CD-ROM drive motor that one drives this operation part work is provided with at the middle part of housing, one is provided with for switching the switch block of this CD-ROM drive motor "on" position and off-position in the grip part of housing, be provided with an action bars in the below of switch block, operating personnel operates the switch block being positioned at housing by action bars.When CD-ROM drive motor is in "on" position, the grinding abrasive disk of operation part can rotate with high speed, once operating personnel's operation is improper, or operating personnel is unfamiliar with instrument, and the grinding abrasive disk of High Rotation Speed is easily to causing human body to damage.In order to prevent maloperation on to greatest extent, be usually provided with a locking component at action bars annex.

Such as No. PCT is PCT/JP2009/065295, and the PCT that name is called " power tool " patent discloses a kind of power tool, and this electric angle grinder has CD-ROM drive motor, for driving emery wheel work piece being performed to grinding or grinding operation; Motor shell, it is received to load onto and states CD-ROM drive motor; Back cover, it is arranged on and the motor shell back-end region of above-mentioned emery wheel installation position in opposition side, and forms by said motor shell the handle portion grasped for operating personnel; Action bars, it carries out grasping by operating personnel with hand and operates, and it is strip and is arranged on both said motor shell and above-mentioned back cover; Switch portion, its counterweight is in above-mentioned back cover, and this switch portion is connected with action bars by opening portion, and produces action by the operation of action bars thus carry out controlling the energising of above-mentioned CD-ROM drive motor.

In above-mentioned patent, in order to prevent the generation of maloperation, action bars is provided with a locking component, and this locking component comprises rotating shaft, holding section and operating portion.The principle of its locking is: when being in lockup state, the elastic reaction applied by spring, and holding section is fastened on the lug boss on action bars, and now, operating personnel cannot operate action bars; When a hand of operating personnel is by operating portion rotary locking part, if when the power that operating personnel applies has exceeded the elastic force of spring, lug boss can be left gradually in the holding section of locking component, until be separated completely, now, operating personnel needs to use another hand, and upwards pressing operations bar makes the switch portion be positioned at above action bars close, CD-ROM drive motor obtains electric rear work, and emery wheel starts to perform grinding or grinding operation.But in operation process, operating personnel needs always according to action bars, otherwise due to the effect of switch restoring force, holding section can be fastened on lug boss again, makes CD-ROM drive motor quit work.

As can be seen here, although above-mentioned locking component can prevent maloperation, additionally increase the operation burden of operating personnel, reduce the operating efficiency of operation, and likely cause CD-ROM drive motor to be stopped by mistake.

Summary of the invention

The purpose of this utility model is to provide a kind of operation burden reducing operating personnel, improves operating personnel's operating efficiency and can be applicable to the electric angle grinder of left-handed person and right-handed person's use simultaneously.

In order to achieve the above object, the technical solution of the utility model there is provided a kind of power tool, comprise housing, the operation end of housing is provided with the operation part for carrying out grinding or grinding to workpiece, operation part is by the drive motor work being located at housing, switch block is provided with in the holding end of housing, by switch block, CD-ROM drive motor is switched to "on" position or off-position, action bars is provided with in the below of switch block, one end of action bars connects housing, it is characterized in that: on action bars, be formed with the gap for installing switch latch, switch latch is positioned at this gap, switch latch is equipped with rotating dog, the two ends attended operation bar respectively of rotating dog, torsion spring is had at rotating dog overcoat, switch latch part is exposed to outside action bars, the remainder of switch latch is positioned at housing, the side of this part of switch latch is provided with the first holding section, the opposite side of switch latch is provided with locating part, in the part of the first holding section, the support portion of matching with the first holding section is provided with inside action bars, left push button and right push button is equipped with respectively in the left and right sides of housing holding end, the top of left push button and right push button is the operating portion be exposed to outside housing, remainder is positioned at housing, the bottom of left push button and right push button is mutually nested, left push button can the direction of push button to the right be moved horizontally, or right push button can the direction of push button left be moved horizontally, resetting-mechanism is connected with between left push button and the bottom of right push button, the part being positioned at housing at left push button and right push button is formed with the first groove and the second groove respectively, the other end of action bars is respectively equipped with the first extension and the second extension with the first groove and the second groove location corresponding section, first extension and the second extension are stretched in the first groove and the second groove respectively, the cell wall of the first groove and the second groove is respectively equipped with one second holding section, on the side of the second holding section, the 3rd holding section of matching with the second holding section is respectively equipped with in the first extension and the second extension, when closing locking, first holding section is fastened on support portion, fixture in locating part and housing offsets, and the second holding section and the 3rd holding section are separated, when open locking, first holding section and support portion are separated, locating part and fixture are separated, and the second holding section on the first groove and the 3rd holding section on the first extension fasten, or the 3rd holding section on the second holding section on the second groove and the second extension fastens.

Preferably, the 3rd extension is extended with in the bottom of described left push button, 3rd extension is provided with the first sliding tray, the 4th extension is extended with in the bottom of described right push button, 4th extension is provided with the second sliding tray, the end of the 3rd extension is positioned at the second sliding tray and can moves horizontally wherein, the end of the 4th extension is positioned at the first sliding tray and can moves horizontally wherein, when closing locking, the end of the 3rd extension and the mutual fastening in end of the 4th extension, described resetting-mechanism is positioned at the space be made up of the 3rd extension and the 4th extension.

Preferably, described resetting-mechanism comprises back-moving spring, and extend to form push button boss to direction, described right push button place in the middle part of described left push button, back-moving spring is enclosed within outside push button boss.

Preferably, operation part comprises emery wheel, outside emery wheel, be provided with protective hood fastening device, and described CD-ROM drive motor is rotated by drive motor emery wheel, wherein:

Protective hood fastening device comprises the cover body covered on outside emery wheel and the protecgulum connected on the housing, a side end face of cover body emery wheel dorsad stretches out formation anchor ear, at least one boss is provided with in the inner side of anchor ear, at least one draw-in groove is provided with at the top of protecgulum, the quantity of draw-in groove is suitable with the quantity of boss, the outer circumference surface of protecgulum has annular groove, the boss of anchor ear is by draw-in groove embedded rings connected in star, the tongue of pulling of spanner is located between anchor ear and protecgulum at outside remainder, anchor ear has shift slot, the part of spanner between anchor ear and protecgulum is provided with gear tooth, gear tooth is stuck in shift slot.

Another technical scheme of the present utility model there is provided a kind of power tool, comprise housing, the operation end of housing is provided with the operation part for carrying out grinding or grinding to workpiece, operation part is by the drive motor work being located at housing, switch block is provided with in the holding end of housing, by switch block, CD-ROM drive motor is switched to "on" position or off-position, action bars is provided with in the below of switch block, one end of action bars connects housing, it is characterized in that: on action bars, be formed with the gap for installing switch latch, switch latch is positioned at this gap, switch latch is equipped with resilient key, the two ends attended operation bar respectively of resilient key, torsion spring is had at resilient key overcoat, switch latch part is exposed to outside action bars, the remainder of switch latch is positioned at housing, the side of this part of switch latch is provided with the first holding section, in the part of the first holding section, the support portion of matching with the first holding section is provided with inside action bars, left push button and right push button is equipped with respectively in the left and right sides of housing holding end, the top of left push button and right push button is the operating portion be exposed to outside housing, remainder is positioned at housing, the bottom of left push button and right push button is mutually nested, left push button can the direction of push button to the right be moved horizontally, or right push button can the direction of push button left be moved horizontally, resetting-mechanism is connected with between left push button and the bottom of right push button, left push button and right push button are respectively equipped with the first extension and the second extension that extend to direction, action bars place, the 4th holding section and the 5th holding section is respectively equipped with in the edge of the first extension and the second extension, 4th holding section is oppositely arranged with the 5th holding section thus is formed between the first extension with the second extension and engages gap, action bars is provided with the 5th extension extended to engaging direction, place, gap, 5th extension part is positioned at engaging gap, the bottom being positioned at engaging gap portion in the 5th extension is provided with the 6th holding section of matching with the 4th holding section or the 5th holding section, when closing locking, first holding section is fastened on support portion, and the 6th holding section and the 4th holding section and the 5th holding section are separated, when open locking, first holding section and support portion are separated, and the 6th holding section and the 4th holding section or the 5th holding section fasten.

Preferably, described resetting-mechanism comprises back-moving spring, and back-moving spring is enclosed within outside spring fixed seat, and spring fixed seat is connected with the bottom of described right push button or described left push button.

Preferably, described operation part comprises emery wheel, outside emery wheel, be provided with protective hood fastening device, and described CD-ROM drive motor is rotated by drive motor emery wheel, wherein:

Protective hood fastening device comprises the cover body covered on outside emery wheel and the protecgulum connected on the housing, a side end face of cover body emery wheel dorsad stretches out formation anchor ear, at least one boss is provided with in the inner side of anchor ear, at least one draw-in groove is provided with at the top of protecgulum, the quantity of draw-in groove is suitable with the quantity of boss, the outer circumference surface of protecgulum has annular groove, the boss of anchor ear is by draw-in groove embedded rings connected in star, the tongue of pulling of spanner is located between anchor ear and protecgulum at outside remainder, anchor ear has shift slot, the part of spanner between anchor ear and protecgulum is provided with gear tooth, gear tooth is stuck in shift slot.

Preferably, be provided with handle stiffener between described housing and described action bars, handle stiffener is fixedly connected with described action bars.

In a kind of power tool that the utility model provides, namely the state locking of electric angle grinder is achieved by simple structure, avoid the generation of maloperation to the full extent, meanwhile, after electric angle grinder is opened, the locking of state is achieved, operating personnel often need not press action bars in operation process, reduce homework burden, improve operating efficiency, and avoid CD-ROM drive motor and occurred by the situation that mistake stops.And the utility model devises the structure of left push button and right push button, makes no matter to be that left-handed person or right-handed person can both operate very smoothly.

Accompanying drawing explanation

A kind of power tool in Figure 1A the present embodiment is in partial structurtes sectional view when closing lockup state;

Figure 1B is the partial enlarged drawing of Figure 1A;

Fig. 2 is the sectional view in Fig. 1;

Fig. 3 is that A-A in Fig. 2 is to sectional view;

Fig. 4 is the partial structurtes sectional view after switch latch is rotated counterclockwise by a kind of power tool in the present embodiment;

Fig. 5 is the partial structurtes sectional view after action bars is pressed by a kind of power tool in the present embodiment;

Fig. 6 is the sectional view in Fig. 5;

Fig. 7 is the transverse sectional view in Fig. 6;

Fig. 8 is the schematic diagram after being promoted by the right push button in Fig. 6;

Fig. 9 is the transverse sectional view in Fig. 8;

Figure 10 is the sectional view of a kind of power tool in the present embodiment right push button part when being in open locking state;

Figure 11 is that A-A in Figure 10 is to sectional view;

The exploded view of the protective hood fastening device that Figure 12 A provides for the utility model;

The installation diagram of the protective hood fastening device that Figure 12 B provides for the utility model;

The scheme of installation of the protective hood fastening device that Figure 13 A provides for the utility model;

The protective cover that anchor ear is housed that Figure 13 B provides for the utility model;

Protecgulum in the protective hood fastening device that Figure 13 C provides for the utility model;

The fixing schematic diagram of the protective hood fastening device that Figure 14 A provides for the utility model;

The top view of Figure 14 A that Figure 14 B provides for the utility model;

The adjusting protecting cover operating angle schematic diagram of the protective hood fastening device that Figure 14 C provides for the utility model;

The top view of Figure 14 C that Figure 14 D provides for the utility model;

The dismounting schematic diagram of the protective hood fastening device that Figure 15 provides for the utility model;

Figure 16 is the partial structurtes sectional view that a kind of power tool in embodiment 2 is in when closing lockup state;

Figure 17 is the sectional view in Figure 16;

Figure 18 is that A-A in Figure 17 is to sectional view;

Figure 19 is action bars in the parts in Figure 17 and Figure 18 schematic diagram upwards after action;

Figure 20 is that A-A in Figure 19 is to sectional view;

Figure 21 is the close-up schematic view of the Ith part in Figure 20;

Figure 22 is the schematic diagram after the right push button in the parts in Figure 17 and Figure 18 promotes to centre;

Figure 23 is that A-A in Figure 22 is to sectional view;

Figure 24 is the close-up schematic view of the IIth part in Figure 23;

Figure 25 is the schematic diagram after the parts engaging in Figure 17 and Figure 18;

Figure 26 is that A-A in Figure 25 is to sectional view;

Figure 27 is the close-up schematic view of the IIIth part in Figure 26.

Detailed description of the invention

For making the utility model become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.

Embodiment 1

As illustrated in figures ia and ib, present embodiment discloses a kind of power tool, comprise housing 10, the operation end of housing 10 is provided with the operation part 11 for carrying out grinding or grinding to workpiece, and in the present embodiment, operation end is positioned at the left end of housing 10.Operation part 11 is by the drive motor work being located at housing 10.In the holding end of housing 10, be provided with switch block 9, in the present embodiment, holding end is positioned at the right-hand member of housing 10.By switch block 9, CD-ROM drive motor is switched to "on" position or off-position.When CD-ROM drive motor is in "on" position, it drives operation part 11 to carry out grinding or grinding; When CD-ROM drive motor is in off-position, operation part 11 quits work.Be provided with action bars 3 in the below of switch block 9, the left end of action bars 3 connects housing 10.When after operating personnel's push bar 3, CD-ROM drive motor is made to be in "on" position.Action bars 3 is formed the gap for installing switch latch 1, and switch latch 1 is positioned at this gap.Penetrate a rotating dog at the middle part of switch latch 1, the two ends attended operation bar 3 respectively of rotating dog, makes switch latch 1 can rotate around rotating dog.Torsion spring 2 is had at rotating dog overcoat.Switch latch 1 part is exposed to outside action bars 3, and the remainder of switch latch 1 is positioned at housing 10.The partial right side being positioned at housing 10 at switch latch 1 stretches out formation first holding section 1a, and the end in the left side of switch latch 1 upwards extends to form locating part 1b.In the part of the first holding section 1a, the support portion 3a that can cooperatively interact with the first holding section 1a is formed in the inner side of action bars 3.Composition graphs 2, left push button 8 and right push button 5 penetrate in the left and right sides of housing 10 holding end respectively.The top of left push button 8 and right push button 5 is be exposed to the operating portion outside housing 10, remainder is positioned at housing 10, the bottom of left push button 8 and right push button 5 is mutually nested, and left push button 8 can the direction of push button 5 to the right be moved horizontally, and right push button 5 can the direction of push button 8 left be moved horizontally.

In the present embodiment, above-mentioned nested structure is specially: in the bottom of left push button 8, the direction of push button 5 extends to form the 3rd extension 5b to the right, and the 3rd extension 5b forms the first sliding tray.Meanwhile, in the bottom of right push button 5, the direction of push button 8 extends to form the 4th extension 8b left, and the 4th extension 8b forms the second sliding tray.The end of the 3rd extension 5b is positioned at the second sliding tray and can moves horizontally wherein, and the end of the 4th extension 8b is positioned at the first sliding tray and can moves horizontally wherein.The end of the 3rd extension 5b and the end of the 4th extension 8b can the mutual fastenings when closing locking.

Resetting-mechanism is connected with between left push button 8 and the bottom of right push button 5.Resetting-mechanism is positioned at the space formed by the 3rd extension 5b and the 4th extension 8b.In the present embodiment, being specially of this resetting-mechanism: comprise back-moving spring 6, in the middle part of left push button 8, direction, push button 5 place extends to form push button boss 12 to the right, and back-moving spring 6 is enclosed within outside push button boss 12.

The part being positioned at housing 10 at left push button 8 and right push button 5 is formed with the first groove 8a and the second groove 5a respectively, on the other end of action bars 3 with the first groove 8a and the second corresponding section, groove 5a position respectively on extend to form the first extension 3a-1 and the second extension 3a-1, first extension 3a-1 and the second extension 3a-1 stretches in the first groove 8a and the second groove 5a respectively, and the cell wall of the first groove 8a and the second groove 5a is respectively equipped with the second left holding section 8c and the second right holding section 5c.The side of first extension 3a-1 and the second extension 3a-1 towards the second left holding section 8c and the second right holding section 5c is respectively equipped with the 3rd left holding section 3b-1 and the 3rd right holding section 3b-2 that holding section 8c left with second and the second right holding section 5c match.

A kind of operation part 11 in the present embodiment comprises emery wheel 14, is provided with protective hood fastening device 13 outside emery wheel 14, and CD-ROM drive motor is rotated by drive motor emery wheel 14.

As shown in Figure 12 A and Figure 12 B, protective hood fastening device 13 comprises the cover body 13-1 covered on outside the emery wheel 14 and protecgulum 13-6 be connected with housing 10.The end face of cover body 13-1 emery wheel 14 side dorsad stretches out and forms anchor ear 2, boss e1, boss e2, boss e3, boss e4 and boss e5 is provided with in the inner side of anchor ear 13-2, have draw-in groove g1, draw-in groove g2, draw-in groove g3, draw-in groove g4, draw-in groove g5 at the top of protecgulum 6, draw-in groove matches with boss.The outer circumference surface of anchor ear 13-2 has annular groove 13-f, and annular groove 13-f also matches with boss, and the tongue of pulling of spanner 13-5 is located at outside, and remainder is located between anchor ear 13-2 and protecgulum 13-6 by upper mounted plate 13-3 and screw 13-4.Anchor ear 13-2 has shift slot 13-b, and gear tooth 13-a is located on spanner 13-5, and gear tooth 13-a is stuck in shift slot 13-b, is provided with spring 7 between spanner 13-5 and the outer circumference surface of protecgulum 13-6.Cover body 13-1 and anchor ear 13-2 is welded into a whole 13-8.

As shown in Figure 13 A to Figure 13 C, when protective cover is installed: by lower ejector lever 13-5, boss e1 on anchor ear 13-2, boss e2, boss e3, boss e4, boss e5 are aimed at draw-in groove g1 corresponding on protecgulum 13-6, draw-in groove g2, draw-in groove g3, draw-in groove g4, draw-in groove g5 respectively, protective cover is inserted in protecgulum 13-6.Rotate protective cover, the boss on anchor ear 13-2 is made to embed in the annular groove 13-f of protecgulum 13-6, rotate to user desired position, unclamp spanner 13-5 simultaneously, and make the gear tooth 13-a on spanner 13-5 block shift slot 13-b on anchor ear 2, play spline, realize the installation of protective hood of grinding wheel.

As shown in Figure 14 A to Figure 14 D, when fixing and adjust protective cover operating angle: pressing spanner 13-5, it is along deep gouge 13-c in protecgulum 13-6 and upper mounted plate 13-3(note: upper mounted plate 13-3 is fixed on protecgulum 13-6 by screw 13-4) slide in the chute that forms, after the gear tooth 13-a of spanner 13-5 and the shift slot 13-b of anchor ear 13-2 throws off (see t1), i.e. rotatable protective cover, according to the angle of job requirement adjusting protecting cover, spanner 13-5 is unclamped after putting in place, under the elastic force effect of spring 13-7, gear tooth 13-a snaps into (see t2) in shift slot 13-b, play and locate and the effect preventing protective cover from rotating.

As shown in figure 15, during dismounting protective cover: as long as pressed by spanner 13-5, and protective cover 13-1 is rotated to the position corresponding with protecgulum 13-6, just desirable go out protective hood of grinding wheel 13-1, decontrol spanner 13-5 simultaneously.

As shown in Figure 1, when being in closedown lockup state, due to the effect of torsion spring 2, the first holding section 1a is fastened on the 3a of support portion securely, and meanwhile, locating part 1b props up the fixture 10a in housing 10.Now, operating personnel cannot operate action bars 3.Composition graphs 2 and Fig. 3, the end of the 3rd extension 5b and the mutual fastening in end of the 4th extension 8b, and the second left holding section 8c and the second right holding section 5c throws off with the 3rd left holding section 3b-1 and the 3rd right holding section 3b-2.

When this power tool opened by needs, first operating personnel rotates counterclockwise switch latch 1 with a hand according to direction as shown in Figure 4, and make the first holding section 1a depart from support portion 3a, meanwhile, locating part 1b is away from fixture 10a.For the operating personnel of right-handed person, now, what use is generally the left hand of operating personnel, and for the operating personnel of left-handed person, and now, what use is generally the right hand of operating personnel.

Then, operating personnel with another hand according to direction pressing operations bar 3 as shown in Figure 5.For the operating personnel of right-handed person, now, what use is generally the right hand of operating personnel, and for the operating personnel of left-handed person, and now, what use is generally the left hand of operating personnel.Composition graphs 6 and Fig. 7, now, the first extension 3a-1 and the second extension 3a-1 can move along with on action bars 3, makes the 3rd left holding section 3b-1 and the 3rd right holding section 3b-2 move to the top of the second left holding section 8c and the second right holding section 5c.Now, for left-handed person operating personnel, it can use the thumb of its left hand according to direction as shown in Figure 8, and pushed away in the direction of right push button 5 push button 8 left, so the right holding section 5c of composition graphs 9 second can move to directly over the 3rd right holding section 3b-2 thereupon.Now, unclamp the hand of pressing operations bar 3, the second right holding section 5c declines thereupon, and nature must be formed with the 3rd right holding section 3b-2 and engage, as shown in Figures 10 and 11.Finally, power tool is in open locking state, and operating personnel can keep power tool always in running order without the need to holding operation bar 3.For right-handed person, it can make right-handed thumb be pushed away in push button 5 direction by left push button 8 to the right, and power tool also can be made to be in open locking state, and its process is the same, is not repeating at this.

When power tool closed by needs, only need up to pin action bars 3 with hand, now, second left holding section 8c or the second right holding section 5c with on move, make it the left holding section 3b-1 or the 3rd right holding section 3b-2 with the 3rd, due to the effect of back-moving spring 6, the second left holding section 8c or the second right holding section 5c is no longer positioned at directly over the 3rd left holding section 3b-1 or the 3rd right holding section 3b-2.Operating personnel is unclamp operation bar 3 again, and action bars 3 resets under the effect of torsion spring 2, and the first holding section 1a is fastened on the 3a of support portion again, and meanwhile, locating part 1b props up fixture 10a, and power tool is in closedown lockup state again.

Embodiment 2

As shown in figure 16, a kind of power tool that the present embodiment provides, comprise housing 10, the operation end of housing 10 is provided with the operation part 11 for carrying out grinding or grinding to workpiece, operation part 11 is by the drive motor work being located at housing 10, switch block 9 is provided with in the holding end of housing 10, by switch block 9, CD-ROM drive motor is switched to "on" position or off-position, action bars 3 is provided with in the below of switch block 9, one end of action bars 3 connects housing 10, action bars 3 is formed the gap for installing switch latch 1, switch latch 1 is positioned at this gap, switch latch 1 is equipped with resilient key, the two ends attended operation bar 3 respectively of resilient key, torsion spring 2 is had at resilient key overcoat, switch latch 1 part is exposed to outside action bars 3, the remainder of switch latch 1 is positioned at housing 10, the side of this part of switch latch 1 is provided with the first holding section 1a, in the part of the first holding section 1a, the support portion 3a matched with the first holding section 1a is provided with inside action bars 3.As shown in FIG. 17 and 18, left push button 8 and right push button 5 is equipped with respectively in the left and right sides of housing 10 holding end, the top of left push button 8 and right push button 5 is be exposed to the operating portion outside housing 10, remainder is positioned at housing 10, the bottom of left push button 8 and right push button 5 is mutually nested, left push button 8 can the direction of push button 5 to the right be moved horizontally, or right push button 5 can the direction of push button 8 left be moved horizontally, resetting-mechanism is connected with between left push button 8 and the bottom of right push button 5, left push button 8 and right push button 5 are respectively equipped with the first extension 8d and the second extension 5d that extend to direction, action bars 3 place, the 4th holding section 8d-1 and the 5th holding section 5d-1 is respectively equipped with in the edge of the first extension 8d and the second extension 5d, 4th holding section 8d-1 is oppositely arranged with the 5th holding section 5d-1 thus is formed between the first extension 8d with the second extension 5d and engages gap 15, action bars 3 is provided with the 5th extension 3c extended to engaging direction, place, gap 15, 5th extension 3c part is positioned at engaging gap 15, the bottom being positioned at engaging gap 15 part at the 5th extension 3c is provided with the 6th holding section 3c-1 matched with the 4th holding section 8d-1 or the 5th holding section 5d-1.

As shown in Figure 1, when being in closedown lockup state, the 6th holding section 3c-1 and the 4th holding section 8d-1 and the 5th holding section 5d-1 is separated.

When this power tool opened by needs, as shown in Figure 19 to Figure 21, by operating personnel, action bars 3 is upwards pushed away, thus make the 6th holding section 3c-1 move to the top of the 4th holding section 8d-1 and the 5th holding section 5d-1.As shown in Figure 22 to Figure 24, by operating personnel, right push button 5 or left push button 8 are inwardly pushed away again, 4th holding section 8d-1 or the 5th holding section 5d-1 is moved, until the 4th holding section 8d-1 or the 5th holding section 5d-1 moves to immediately below the 6th holding section 3c-1 to the 6th direction, 3c-1 place, holding section.As described in Figure 25 to Figure 27, now, operating personnel's unclamp operation bar the 3, six holding section 3c-1 moves downward, thus is fastened on the 4th holding section 8d-1 or the 5th holding section 5d-1.

Other structures of the present embodiment and working method are with embodiment 1.

Claims (8)

1. a power tool, comprise housing (10), the operation end of housing (10) is provided with the operation part (11) for carrying out grinding or grinding to workpiece, operation part (11) is by the drive motor work being located at housing (10), switch block (9) is provided with in the holding end of housing (10), by switch block (9), CD-ROM drive motor is switched to "on" position or off-position, action bars (3) is provided with in the below of switch block (9), one end of action bars (3) connects housing (10), it is characterized in that: on action bars (3), be formed with the gap for installing switch latch (1), switch latch (1) is positioned at this gap, switch latch (1) is equipped with rotating dog, two ends attended operation bar (3) respectively of rotating dog, torsion spring (2) is had at rotating dog overcoat, switch latch (1) part is exposed to action bars (3) outward, the remainder of switch latch (1) is positioned at housing (10), the side of switch latch (1) this part is provided with the first holding section (1a), the opposite side of switch latch (1) is provided with locating part (1b), in the part of the first holding section (1a), the support portion (3a) of matching with the first holding section (1a) is provided with in action bars (3) inner side, left push button (8) and right push button (5) is equipped with respectively in the left and right sides of housing (10) holding end, the top of left push button (8) and right push button (5) is for being exposed to housing (10) operating portion outward, remainder is positioned at housing (10), the bottom of left push button (8) and right push button (5) is mutually nested, left push button (8) can the direction of push button (5) to the right be moved horizontally, or right push button (5) can the direction of push button (8) left be moved horizontally, resetting-mechanism is connected with between left push button (8) and the bottom of right push button (5), the part being positioned at housing (10) at left push button (8) and right push button (5) is formed with the first groove (8a) and the second groove (5a) respectively, the other end of action bars (3) is respectively equipped with the first extension (3a-2) and the second extension (3a-1) with the first groove (8a) and the second groove (5a) corresponding section, position, first extension (3a-2) and the second extension (3a-1) stretch in the first groove (8a) and the second groove (5a) respectively, the cell wall of the first groove (8a) and the second groove (5a) is respectively equipped with one second holding section, on the side of the second holding section, the 3rd holding section of matching with the second holding section is respectively equipped with at the first extension (3a-2) and the second extension (3a-1), when closing locking, first holding section (1a) is fastened on support portion (3a), locating part (1b) offsets with the fixture (10a) in housing (10), and the second holding section and the 3rd holding section are separated, when open locking, first holding section (1a) and support portion (3a) are separated, locating part (1b) and fixture (10a) are separated, and the second holding section on the first groove (8a) and the 3rd holding section on the first extension (3a-2) fasten, or the 3rd holding section on the second holding section on the second groove (5a) and the second extension (3a-1) fastens.

2. a kind of power tool as claimed in claim 1, it is characterized in that: be extended with the 3rd extension (5b) in the bottom of described left push button (8), 3rd extension (5b) is provided with the first sliding tray, the 4th extension (8b) is extended with in the bottom of described right push button (5), 4th extension (8b) is provided with the second sliding tray, the end of the 3rd extension (5b) is positioned at the second sliding tray and can moves horizontally wherein, the end of the 4th extension (8b) is positioned at the first sliding tray and can moves horizontally wherein, when closing locking, the end of the 3rd extension (5b) and the mutual fastening in end of the 4th extension (8b), described resetting-mechanism is positioned at the space be made up of the 3rd extension (5b) and the 4th extension (8b).

3. a kind of power tool as claimed in claim 1 or 2, it is characterized in that: described resetting-mechanism comprises back-moving spring (6), described left push button (8) middle part extends to form push button boss (12) to described right push button (5) direction, place, and back-moving spring (6) is enclosed within push button boss (12) outward.

4. a kind of power tool as claimed in claim 1, it is characterized in that: described operation part (11) comprises emery wheel (14), outside emery wheel (14), be provided with protective hood fastening device (13), described CD-ROM drive motor is rotated by drive motor emery wheel (14), wherein:

Protective hood fastening device (13) comprises the protecgulum (13-6) covering on emery wheel (14) cover body outward (13-1) and be connected on described housing (10), a side end face of cover body (13-1) emery wheel (14) dorsad stretches out and forms anchor ear (13-2), at least one boss is provided with in the inner side of anchor ear (13-2), at least one draw-in groove is provided with at the top of protecgulum (13-6), the quantity of draw-in groove is suitable with the quantity of boss, the outer circumference surface of protecgulum (13-6) has annular groove (13-f), the boss of anchor ear (13-2) is by draw-in groove embedded rings connected in star (13-f), the tongue of pulling of spanner (13-5) is positioned at outside remainder and is located between anchor ear (13-2) and protecgulum (13-6), anchor ear (13-2) has shift slot (13-b), the part that spanner (13-5) is positioned between anchor ear (13-2) and protecgulum (13-6) is provided with gear tooth (13-a), gear tooth (13-a) is stuck in shift slot (13-b).

5. a power tool, comprise housing (10), the operation end of housing (10) is provided with the operation part (11) for carrying out grinding or grinding to workpiece, operation part (11) is by the drive motor work being located at housing (10), switch block (9) is provided with in the holding end of housing (10), by switch block (9), CD-ROM drive motor is switched to "on" position or off-position, action bars (3) is provided with in the below of switch block (9), one end of action bars (3) connects housing (10), it is characterized in that: on action bars (3), be formed with the gap for installing switch latch (1), switch latch (1) is positioned at this gap, switch latch (1) is equipped with resilient key, two ends attended operation bar (3) respectively of resilient key, torsion spring (2) is had at resilient key overcoat, switch latch (1) part is exposed to action bars (3) outward, the remainder of switch latch (1) is positioned at housing (10), the side of switch latch (1) this part is provided with the first holding section (1a), in the part of the first holding section (1a), the support portion (3a) of matching with the first holding section (1a) is provided with in action bars (3) inner side, left push button (8) and right push button (5) is equipped with respectively in the left and right sides of housing (10) holding end, the top of left push button (8) and right push button (5) is for being exposed to housing (10) operating portion outward, remainder is positioned at housing (10), the bottom of left push button (8) and right push button (5) is mutually nested, left push button (8) can the direction of push button (5) to the right be moved horizontally, or right push button (5) can the direction of push button (8) left be moved horizontally, resetting-mechanism is connected with between left push button (8) and the bottom of right push button (5), left push button (8) and right push button (5) are respectively equipped with the first extension (8d) and the second extension (5d) that extend to action bars (3) direction, place, the 4th holding section (8d-1) and the 5th holding section (5d-1) is respectively equipped with in the edge of the first extension (8d) and the second extension (5d), 4th holding section (8d-1) is oppositely arranged with the 5th holding section (5d-1) thus is formed between the first extension (8d) with the second extension (5d) and engages gap (15), action bars (3) is provided with the 5th extension (3c) extended to engaging gap (15) direction, place, 5th extension (3c) part is positioned at engaging gap (15), the bottom being positioned at engaging gap (15) part in the 5th extension (3c) is provided with the 6th holding section (3c-1) of matching with the 4th holding section (8d-1) or the 5th holding section (5d-1), when closing locking, first holding section (1a) is fastened on support portion (3a), and the 6th holding section (3c-1) is separated with the 4th holding section (8d-1) and the 5th holding section (5d-1), when open locking, first holding section (1a) and support portion (3a) are separated, and the 6th holding section (3c-1) fastens with the 4th holding section (8d-1) or the 5th holding section (5d-1).

6. a kind of power tool as claimed in claim 5, it is characterized in that: described resetting-mechanism comprises back-moving spring (6), back-moving spring (6) is enclosed within spring fixed seat (12) outward, and spring fixed seat (12) is connected with the bottom of described right push button (5) or described left push button (8).

7. a kind of power tool as claimed in claim 5, it is characterized in that: described operation part (11) comprises emery wheel (14), outside emery wheel (14), be provided with protective hood fastening device (13), described CD-ROM drive motor is rotated by drive motor emery wheel (14), wherein:

Protective hood fastening device (13) comprises the protecgulum (13-6) covering on emery wheel (14) cover body outward (13-1) and be connected on described housing (10), a side end face of cover body (13-1) emery wheel (14) dorsad stretches out and forms anchor ear (13-2), at least one boss is provided with in the inner side of anchor ear (13-2), at least one draw-in groove is provided with at the top of protecgulum (13-6), the quantity of draw-in groove is suitable with the quantity of boss, the outer circumference surface of protecgulum (13-6) has annular groove (13-f), the boss of anchor ear (13-2) is by draw-in groove embedded rings connected in star (13-f), the tongue of pulling of spanner (13-5) is positioned at outside remainder and is located between anchor ear (13-2) and protecgulum (13-6), anchor ear (13-2) has shift slot (13-b), the part that spanner (13-5) is positioned between anchor ear (13-2) and protecgulum (13-6) is provided with gear tooth (13-a), gear tooth (13-a) is stuck in shift slot (13-b).

8. a kind of power tool as claimed in claim 5, is characterized in that: between described housing (10) and described action bars (3), be provided with handle stiffener (16), and handle stiffener (16) is fixedly connected with described action bars (3).