CN101584288B

CN101584288B - Handheld tool

Info

Publication number: CN101584288B
Application number: CN200810123361XA
Authority: CN
Inventors: 杨军
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2008-05-21
Filing date: 2008-05-21
Publication date: 2011-06-29
Anticipated expiration: 2028-05-21
Also published as: CN101584288A

Abstract

The invention discloses a handheld cutting tool. The handheld cutting tool comprises a main machine shell, a driving device arranged on the main machine shell, a workpiece driven by the driving device, a switch for controlling the driving device, as well as a first handle and a second handle which are arranged on the main machine shell, wherein the first handle is provided with a first trigger device, the second handle is provided with a second trigger device, and the switch can be started only when the two trigger devices are triggered by an operator respectively; and the second trigger device comprises a U-shaped trigger part, the U-shaped trigger part is provided with two end parts, the first end is movably connected to the second handle, the second end is set as a tail free end, and the arrangement of the U-shaped trigger part ensures that the operator can ensure the safe and effective triggering of the switch by holding any gripping part of the second handle.

Description

Hand-held tool

Technical field

The present invention relates to a kind of garden tool set, especially a kind of hand held cutting tool.

Background technology

Usually, outdoor gardening class such as shrub and hedge trimmer cutting tool is provided with forward and backward handle and is used for both hands and grips and to operate, flip flop equipment all is set on each handle, having only flip flop equipment when two handles not to be operated respectively the person presses the shrub and hedge trimmer switch and just can be activated, thereby make shrub and hedge trimmer carry out driving work, the safety requirements when satisfying cutting operation.

The patent specification of announcing No. 61786421 as United States Patent (USP) has disclosed a kind of electric shrub and hedge trimmer of bimanualness, it comprises host shell, be arranged at the main handle of host shell rear end, and the U-shaped assist handle that is positioned at the host shell front end, main handle is provided with the triggering part, and assist handle is provided with the U-shaped that extends along the inboard profile of handle grip portion and triggers part; Resilient bias also is set in the assist handle and triggers the hawser that part is connected with U-shaped, elastic biasing arrangement makes U-shaped triggering part keep radially outer state on assist handle, hawser is passed to a piston rod by the motion that a swinging mounting will trigger part, the displacement of piston rod causes the triggering of switch, the operator can radially inwardly push the triggering part in the different parts of U-shaped holding part all can be passed to swinging mounting by hawser, drive the displacement that piston rod produces a horizontal direction again, make shrub and hedge trimmer startup work thereby finally cause switch to be triggered, in case the operator discharges the triggering part, the shrub and hedge trimmer switch will be disconnected, and shrub and hedge trimmer promptly quit work.

United States Patent (USP) is announced the 5867910th patent specification and has been disclosed a kind of cutting tool for another example, it includes support, be positioned at the work package on the support, and the power set that are used to drive work package, be arranged at the annular hand grip on the support, be provided with switch in this annular hand grip, elastic device, annular hand grip is provided with a plurality of inverted triangle gathering sills, one can be triggered part and partly is contained in this annular hand grip at the U-shaped of different directions trigger switch, a plurality of leads that U-shaped triggers the part setting can be nibbled to be incorporated in the groove and move with annular hand grip inverted triangle gathering sill, make the operator on the either direction (being generally three directions) of this annular hand grip, push U-shaped trigger part can both trigger switch; When it mainly relies on U-shaped to trigger lead on the part to mesh with del groove on the handle, can be subjected to the guiding on the different cell wall directions of del, trigger part motion in different directions the most at last and be passed to an elastic device, thereby trigger switch starts cutting work.

Be connected with hawser on the triggering part of above-mentioned first preceding case, the rope that moves through that triggers part is passed to swinging mounting, promotes piston rod again and moves and be used for trigger switch; In the transmission mechanism that the motion that triggers part is transmitted, hawser wherein can often rub with swinging mounting, and the time one is grown, wearing and tearing that hawser can be subjected to or distortion, thus cause operation failure easily.The processing of the lead of del groove on the handle in above-mentioned second preceding case and triggering part and structure fabrication be more complicated all, and cost can be higher relatively.

Summary of the invention

For overcoming the deficiencies in the prior art, the invention provides a kind of easy to operately, safe and reliable, simple in structure, and cost is relatively low, is applicable to the bat-handle switch trigger mechanism of gardening hand held cutting tool.

Technical scheme of the present invention is achieved in that a kind of hand-held tool, comprise host shell, be arranged at the drive unit of host shell, work package by the drive unit driving, the switch that is used for accessory drive, be arranged at the first handle and the second handle of host shell, described first handle is provided with first flip flop equipment, described second handle is provided with second flip flop equipment, described second flip flop equipment comprises that one triggers part, described triggering part is arranged to U-shaped, it comprises first end and second end, described first end is movably connected on second handle, second end is arranged to comprise a lever piece and a sliding bar in the described second handle housing of free terminal, and described lever piece has a upper end and a bottom, and described upper end and described free terminal activity connect, one end activity of described bottom and described sliding bar connects, the other end of described sliding bar and described switch is selectable connects.

Described free terminal comprises two sidewalls, and curved end is arranged in the upper surface of described sidewall; Described second handle is connected near on the host shell of work package, and is arranged to have the annular hand grip of first, second, third holding part; Described second handle comprises two Hough sandwich type elements that connect by securing member, is provided with cavity in the described housing and is used to hold to small part second flip flop equipment; Be provided with projection in the described second handle housing, first end of described second flip flop equipment is provided with waist through hole, and described projection is movably connected on waist through hole; Described curved end is to be the curved end that the center of circle is provided with the projection, and described second flip flop equipment is arranged at second handle with the projection for the rotating shaft pivot; The upper end of described lever piece has the protuberance that connects with above-mentioned free terminal, and described protuberance selectively connects with curved end; Described sliding bar is provided with waist through hole, and its amount sliding bar one end and the activity of lever piece bottom connect, and the other end and switch selectively connect; One inclination projection is set on the described triggering part, is provided with elastic component between described inclination projection and the second handle housing; On the described triggering part guide is set, described second handle housing is provided with bearing rib, and described guide and bearing rib selectively slide and connect.

In sum, advantage of the present invention is: easy to operate and safe and reliable, simple in structure, thus provide cost savings.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is that shrub and hedge trimmer of the present invention move along main apparent direction and cut open schematic diagram after the partial shell.

Fig. 2 is the three-dimensional exploded view of shrub and hedge trimmer front hand grip of the present invention.

Fig. 3 is the cutaway views of shrub and hedge trimmer of the present invention by A-A direction among Fig. 1, and this moment, the front hand grip flip flop equipment was in non-pressed state.

Fig. 4 is the cutaway views of shrub and hedge trimmer of the present invention by A-A direction among Fig. 1, at this moment the state that the position of corresponding first or second holding part is pressed on the front hand grip flip flop equipment.

Fig. 5 is the cutaway views of shrub and hedge trimmer of the present invention by A-A direction among Fig. 1, at this moment the state that the position of corresponding the 3rd holding part is pressed on the front hand grip flip flop equipment.

Wherein:

1-shrub and hedge trimmer 12-trip bolt 22-pin 29b-second end

The 2-host shell 13-second flip flop equipment 22a-tack spiral shell emits the 30-curved end

The 3-tool section assembly 13a-cross bar 22b-of portion nut 30a-sidewall

The 4-back handle 13b-first vertical pole portion 23a-holding part 30b-sidewall

The 5-front hand grip 13c-second vertical pole portion 23b-holding part 31-protuberance

32-bottom, 5a-casing 13d-guide part 23c-holding part

5b-casing 14-waist through hole 24-support rod 33-sliding bar

5c-cavity 15-rectangular through-hole 25-switch 33a-large-diameter portion

6-protective cover 16-cross column cap 25a-column cap 33b-minor diameter part

7-power brick 17-spring 25b-column cap 34-waist through hole

8-switch 19-lever piece 26-connecting portion 35-spring

9-first triggers part 19a-pivotal point 27-connecting portion F1-force direction

10-spring 20-inclination projection 28-connecting portion F2-force direction

The 11-pivot 21-spring 29a-first terminal F3-force direction

Embodiment

The invention discloses a kind of hand-held gardening cutting tool, now describe with specific embodiment.

With reference to shown in Figure 1, trimmer 1 has a host shell that extends longitudinally 2, be provided with the drive unit (not shown) in the host shell 2, the front end of host shell 2 is connected with tool section assembly 3, be provided with protective cover 6 between host shell 2 and the tool section assembly 3, the rear end of body shell 2 be provided with one with the detachable TunePower bag 7 that is connected of body shell, the top of power brick 7, be provided with the main handle 4 that is connected with main body housing 2, this main handle is the back handle 4 that the operator grips when being used to operate, the holding part of this back handle 4 is along the longitudinal extension of main body housing 2, back handle 4 inside are provided with switch 8, the pivotally connected flip flop equipment 9 of a side of close power brick 7 on the holding part, flip flop equipment 9 can rotate relative to pivot 11 in pushing of operator overcomes spring 10 under the active force elastic force, promptly flip flop equipment 9 can switch 8 be in the primary importance of off-state and the second place that switch 8 is triggered between move; At the front end of back handle 4 housing position near drive unit, a roughly ringwise assist handle is set, the front hand grip 5 that grips when promptly the operator operates, this front hand grip 5 can be arranged to relative main body housing 2 with it and can carry out pivotal adjustment according to action need.

With reference to shown in Figure 2, front hand grip 5 housings are made up of two Hough formula casing 5a and 5b that connect by trip bolt 12, the cavity 5c (wherein the cavity 5c of casing 5b is not shown) that is provided with respectively in casing 5a and the 5b, when being joined together, two Hough formula casing 5a and 5b can form the cavity of accommodating that to accommodate to small part second flip flop equipment 13, annular hand grip forms three holding part 23a respectively along its bearing of trend, 23b, and 23c and two connecting

portions

26,27 that are connected with body shell 2.Second flip flop equipment 13 comprises a triggering part that roughly takes the shape of the letter U, and it has a 13a of cross bar portion and bends 13b of vertical pole portion and the 13c that stretches by cross bar portion to two ends, and wherein the upper surface of the 13a of cross bar portion is provided with an inclination projection 20, a sheathed spring 21 on the inclination projection 20; Wherein first 13b of vertical pole portion roughly therein the position of bottom bend, and forming a cross section at its extending end place is the oval-shaped first terminal 29a, this first terminal 29a place is provided with a waist through hole 14, first 13b of vertical pole portion is provided with a rectangular through-hole 15 perpendicular to waist through hole 14 in addition above waist through hole 14, this rectangular through-hole 15 is used to receive interting of pin 22, wherein an end of pin 22 is provided with the tack spiral shell and emits 22a, the other end then for being provided with the free end of screw thread, is used for connecting with nut 22b activity; Wherein the first terminal 29a is provided with cross column cap 16 towards the side of second 13c of vertical pole portion, and it is thereon sheathed that this cross column cap 16 is used for support spring 17.The extending end of second 13c of vertical pole portion is arranged to the second terminal 29b that has some to upwarp slightly, and upwarps part two sidewall 30a with

curved end

30,30b are set.One pivotally supported lever piece 19 also is set in front hand grip 5 housings, a upper end 31 and a bottom 32 of lever piece 19 tools, the pivotal point 19a middle part of the lever piece between top and bottom 19 roughly then wherein, it is oval-shaped protuberance 31 that cross section is arranged in the upper end of lever piece 19, be used for the second terminal 29b sidewall 30a with second 13c of vertical pole portion, curved end 30 activities of 30b connect, and 32 of the bottoms of lever piece 19 can connect with a sliding bar 33 activities; Sliding bar 33 roughly is in front hand grip 5 housings and is horizontally disposed with, sliding bar 33 comprises a large-diameter portion 33a and minor diameter part 33b, wherein on the large-diameter portion 33a waist through hole 34 is set, be arranged with spring 35 on the minor diameter part 33b, in addition, column cap 25a that is provided with among the handle housing 5a cavity 5c and 25b mesh with waist through

hole

14,34 respectively.

With reference to shown in Figure 3, flip flop equipment 13 extends along the inboard profile of annular hand grip 5, and partly be contained in handle housing 5a, in the inner chamber of 5b, part protrudes from handle housing 5a, the outside of 5b, flip flop equipment 13 by be sheathed on spring 21 on the inclination projection 20 by resiliency supported in handle housing 5a, on the 5b; Be provided with switch 25 at connecting portion 28 near the host shell 2 of sliding bar 33 minor diameter part 33b one end, pin 22 is passed the connecting portion 28 of rectangular through-hole 15 and host shell 2 by handle connecting portion 27 places, be threaded with the nut 22b in being arranged at handle connecting portion 26, thereby front hand grip 4 effectively is connected with body shell 2.In addition, also be provided with on the flip flop equipment 13 a guide part 13d be used for handle housing in support rod 24 slide and connect, when flip flop equipment 13 is not subjected to any when pushing active force, column cap 25a is engaged in the waist through hole 14, the end of first 13b of vertical pole portion makes the left side wall of waist through hole 14 against column cap 25a under the active force of spring 17, and sliding bar 33 makes the right side wall of waist through hole 34 against column cap 25b under the active force of spring 35, this moment, the protuberance 31 of lever piece 19 was supported in sidewall 30a, the place ahead of the curved end 30 of 30b, promptly protuberance 31 does not lean with curved end 30.

With further reference to shown in Figure 4, when the operator grips the first holding part 23a execution cutting operation of front hand grip 4, grant the active force of first 13b of vertical pole portion along the direction shown in the F1 in order to starting switch 25, flip flop equipment 13 can pivot around column cap 25a under this active force, this moment, spring 21 was compressed along with the rotation of flip flop equipment 13, guide part 13d is along with the rotation and the support rod 24 of flip flop equipment 13 break away from, the end of second 13c of vertical pole portion is along with the rotation of flip flop equipment 13 causes the protuberance 31 of lever piece 19 along

sidewall

30a, 30b curved end 30 slides, be sidewall 30a, the curved end 30 of 30b lifts the protuberance 31 of lever piece 19, make lever piece 19 relative pivot 19a rotate, thereby the bottom 32 that causes lever piece 19 overcomes the elastic force of spring 35 makes sliding bar 33 produce displacement in the horizontal direction, and then trigger switch 25, wall shift is moving to the left by the right side wall against waist through hole 34 for column cap 25b at this moment.Because sidewall 30a, the curved end 30 of 30b is to be the arc surface of making in the center of circle with column cap 25a, even if because the operator is excessive along the application of force of direction shown in the F1, protuberance 31 being moved further on curved end do not influence the amount of spin of lever piece 19 bottoms 32, thereby make that sliding part 33 displacement in the horizontal direction also is constant, so just can not damage switch 25 because of exerting oneself excessive.Equally, when the operator grips the second holding part 23b execution cutting operation of front hand grip 4, grant active force of the 13a of cross bar portion along direction shown in the F2, flip flop equipment 13 can still pivot around column cap 25a under this active force, spring 21 is compressed along with the rotation of flip flop equipment 13, sidewall 30a, the curved end of 30b lifts the protuberance 31 of lever piece 19, the rotate bottom 32 that causes lever piece 19 of lever piece 19 relative pivot 19a promotes sliding bars 33 and produces displacement in the horizontal direction, and then trigger switch 25.

With further reference to shown in Figure 5, the 3rd holding part 23c that grips front hand grip 4 as the operator carries out cutting operation, when direction shown in the F3 is granted active force of second 13c of vertical pole portion, flip flop equipment 13 overcomes the relative handle housing 5a of active force of

spring

17,5b produces one and moves horizontally, the spring 17 of this moment is compressed, column cap 25a is against the right side wall of waist through hole 14, spring 21 then moves with flip flop equipment 13 along force direction, guide part 13d is along with moving on support rod 24 of flip flop equipment 13 slided, support rod 24 slided on its surface to flip flop equipment 13 guiding and position-limiting action was provided this moment, when flip flop equipment 13 arrived certain horizontal displacement, support rod 24 can stop flip flop equipment 13 further to slide; The translation of flip flop equipment 13 causes protuberance 31 jack-up of the end of second 13c of vertical pole portion with lever piece 19, the protuberance 31 of this moment is positioned at and is supported in sidewall 30a, the place ahead of the curved end 30 of 30b, lever piece 19 rotates around pivot 19a, cause the bottom 32 fexible bias pressure sliding bars 33 of lever piece 19 to make it produce displacement in the horizontal direction, and then trigger switch 25.

Switch and flip flop equipment so are provided with in forward and backward handle of shrub and hedge trimmer and the handle, make the operator when carrying out cutting operation, have only both hands to grip different handles, and triggering is arranged at the switch of back handle and the switch of front hand grip respectively, shrub and hedge trimmer could startup work, thereby guaranteed the safety of shrub and hedge trimmer bimanualnesses.Particularly U-shaped triggers the setting of part in the front hand grip, makes the operator utilize all trigger switches 25 easily of different holding parts when carrying out the cutting of different angles, and this flip flop equipment simple in structure, reliable, be not easy to lose efficacy, manufacturing cost is relatively low.

Claims

1. hand-held tool, comprise host shell (2), be arranged at the drive unit of host shell, work package (3) by the drive unit driving, the switch (8 that is used for accessory drive, 25), be arranged at the first handle (4) and the second handle (5) of host shell, described first handle is provided with first flip flop equipment (9), described second handle is provided with second flip flop equipment (13), it is characterized in that: described second flip flop equipment comprises that one triggers part, described triggering part is provided with first end (29a) and second end (29b), described first end is movably connected on second handle (5), and second end is arranged to free terminal, comprises a lever piece (19) and a sliding bar (33) in described second handle (5) housing, described lever piece (19) has a upper end (31) and a bottom (32), described upper end (31) and described free terminal activity connect, and described bottom (32) connect with an end activity of described sliding bar (33), the other end of described sliding bar and described switch is selectable connects.

2. according to the described hand-held tool of claim 1, it is characterized in that: described free terminal comprises that (30a, 30b), curved end (30) is arranged in the upper surface of described sidewall to two sidewalls.

3. hand-held tool according to claim 2 is characterized in that: described second handle (5) is connected near on the host shell of work package, and is arranged to have first, second, third holding part (23a, 23b, annular hand grip 23c).

4. hand-held tool according to claim 3, it is characterized in that: described second handle comprises two Hough sandwich type element (5a that connect by securing member, 5b), being provided with cavity (5c) in the described Hough sandwich type element is used to hold to small part second flip flop equipment (13).

5. hand-held tool according to claim 4 is characterized in that: be provided with projection (25a) in the described second handle housing, first end of described second flip flop equipment is provided with waist through hole (14), and described projection is movably connected on waist through hole.

6. hand-held tool according to claim 5, it is characterized in that: described curved end (30) is to be the curved end that the center of circle is provided with projection (25a), and described second flip flop equipment (13) is that the rotating shaft pivot is arranged at second handle (5) with projection (25a).

7. hand-held tool according to claim 6 is characterized in that: the upper end of described lever piece (31) have the protuberance (31) that connects with above-mentioned free terminal, and described protuberance selectively connects with curved end (30).

8. hand-held tool according to claim 7 is characterized in that: described sliding bar is provided with waist through hole (34), and described sliding bar one end and lever piece bottom (32) activity connect, and the other end and switch (25) selectively connect.

9. hand-held tool according to claim 8 is characterized in that: an inclination projection (20) is set on the described triggering part, is provided with elastic component (21) between described inclination projection and the handle housing.

10. hand-held tool according to claim 9 is characterized in that: a guide (13d) is set on the described triggering part, and described second handle housing is provided with bearing rib (24), and described guide and bearing rib selectively slide and connect.