CN101336600A

CN101336600A - Pruning shears with rotatable post-handle

Info

Publication number: CN101336600A
Application number: CNA200810059689XA
Authority: CN
Inventors: 陈勇
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2008-02-03
Filing date: 2008-02-03
Publication date: 2009-01-07
Anticipated expiration: 2028-02-03
Also published as: CN101336600B

Abstract

The present invention discloses a pair of pruning shears of which rear handle can revolve; the rear handle is provided with two gripping structures; an operator can grip the rear handle by double hands to hold the pruning shears and prune branches, thus really achieving the function of expanding operation range easily; compared with the prior pruning shears gripped by a single hand, the rear handle changes the operation mode of the pruning shears through double hands gripping, thus lightening the labour intensity of the operator greatly, moreover, the U-shaped rear handle can scatter the external force loaded on the rear handle, stabilize the connection relation between the handle and the casing, and prolong the serving life of the pruning shears; the U-shaped rear handle as an extension mechanism of the pruning shears also has the advantages of simple structure, low manufacturing cost and the like, so the pruning shears are compact in structure, lightweight and small, and convenient for carrying and manual operation.

Description

A kind of pruning shears with rotatable post-handle

Technical field

The present invention relates to a kind of pruning shears with rotatable post-handle, relate in particular to the back handle of these shrub and hedge trimmer.

Background technology

Shrub and hedge trimmer are a conventional electric instruments, the pruning plant that is usually used in.Its structure of traditional shrub and hedge trimmer has plenty of by a front hand grip and a back handle and forms, a switch control trigger is generally respectively arranged on front hand grip and back handle, two switches control triggers of shrub and hedge trimmer must move just simultaneously can turning circuit, make machine works, wherein any one switch control trigger discharges and resets and can machine be stopped disconnecting circuit; By the structure of shrub and hedge trimmer be that a front hand grip and a back handle are formed, but a switch control trigger is only arranged on back handle, this switch control trigger action just change can conducting or disconnecting circuit make machine works or out of service.The housing of this back handle and shrub and hedge trimmer flexibly connects, and handle can rotate, and its objective is by the rotation back handle, and is more convenient when side is sheared.This movable back handle has only one to hold and pinch structure, in case the rotation back handle is held the command range lengthening of pinching back handle so or shortened.For making the easier shearing of operator than the higher or distant plant that is sheared, this back handle also has extension rod, the length of back handle is used for extending, but, when the operation biswitch is controlled the shrub and hedge trimmer of trigger form, on the handle, therefore how back handle prolonged all and can be restricted in the control front hand grip, causes shrub and hedge trimmer to lose the function that enlarges job area before and after operator's both hands must be held in; When the shrub and hedge trimmer of operation sheet switch control trigger form, back handle and keep single switch control trigger to be in connection status just making shrub and hedge trimmer work though as long as the operator holds with a firm grip, thereby enlarge the working range of shrub and hedge trimmer, but back handle has only one to hold and pinch structure, the operator gets only one hand and holds and pinch, and the alleged power that is subjected to of back handle is very big when keeping the duty of shrub and hedge trimmer, the gravity of whole fuselage, the frictional force that operation produces all acts on the back handle, therefore the operator operates very hard, cause the problem of operating difficulties, for being undertaken, back handle realizes this function simultaneously, its inside is complex structure often, the production cost height makes this shrub and hedge trimmer body comparatively heavy.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of pruning shears with rotatable post-handle, and it has the extension mechanism that operation is light, simple in structure, production cost is low, and this shrub and hedge trimmer compact conformation, light small and exquisite, is easy to carry or manual operations.

For solving the problems of the technologies described above, the present invention adopts following technical scheme: the casing front portion of these shrub and hedge trimmer is provided with front hand grip, described front hand grip is provided with trigger I, the execution trigger interlock of described trigger I and casing inside, described casing rear portion is connected with back handle, described back handle is the U type, diverge on it and be provided with a main handle and a secondary handle, described main handle inside is provided with trigger II, the movable end of described trigger II and the interlock of execution trigger, described secondary handle inside is provided with trigger III, and the movable end of described trigger III also links with the execution trigger.

As a kind of improvement of the present invention, described casing is provided with the detent of curved arrangement in the junction with back handle, described main handle also is provided with a cage knob that can be free to slide in the junction with casing, and described cage knob is at the positioning convex that is provided with corresponding detent towards an end of casing.The cage knob that is free to slide is done the positioning convex of straight line slippage on it and just can embedded in the detent under the situation of detent, and then back handle and casing are fixed together, and prevents the back handle rotation.The curved arrangement of a plurality of detents, so the fixing angle of back handle can be selected, it is α that N detent is radian, the rotatable minimum angles of back handle is α/N just so, the big more side shearing manipulation of just being more convenient for of adjustable extent.

As a further improvement on the present invention, described cage knob is provided with protruding I in the place towards trigger II, and the movable end of described trigger II is provided with protruding II.The scope of activities of the movable end of the scope of activities of cage knob and trigger II intersects, and breaks away from cage knob under the situation of detent, and protruding I just is positioned at the hunting range of the movable end of trigger II, and promptly protruding in this case II can be blocked by protruding I.There is not the action of trigger II under the fixing situation can not change the state of shrub and hedge trimmer at back handle like this.

The present invention adopts technique scheme, and back handle has two to be held and pinch structure, and the operator can both hands holds and pinches back handle and grip shrub and hedge trimmer and carry out operation, thus the real function that easily realizes enlarging job area; Hold the shrub and hedge trimmer of pinching and compare with singlehanded in the past, back handle is held by both hands and is pinched the thorough mode of operation that has changed shrub and hedge trimmer, alleviate operator's labour intensity greatly, and the reasonable external force of peptizaiton on back handle of the back handle of U type energy, annexation between firm back handle and the casing, the service life of prolongation shrub and hedge trimmer; The back handle of U type also has advantage simple in structure, that production cost is low as the extension mechanism of shrub and hedge trimmer, makes this shrub and hedge trimmer compact conformation, light small and exquisite, is easy to carry and manual operations.The present invention also has reliable safety except that having high-caliber operability and portability, judge jointly by cage knob and trigger II whether back handle is in stationary state, is further implemented in startup shrub and hedge trimmer under the safe condition.

Description of drawings

Below in conjunction with the drawings and specific embodiments the present invention is further specified.

Fig. 1 is the interior schematic diagram during for a kind of state of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 2 is the interior schematic diagram during for the another kind of state of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 3 is the casing structure schematic diagram of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 4 is first kind of view of cocking mechanism of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 5 is second kind of view of cocking mechanism of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 6 is first kind of user mode schematic diagram of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 7 is second kind of user mode schematic diagram of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 8 is the third user mode schematic diagram of a kind of pruning shears with rotatable post-handle of the present invention;

Fig. 9 is the 4th kind of user mode schematic diagram of a kind of pruning shears with rotatable post-handle of the present invention.

Embodiment

As shown in Figure 1, casing 9 front portions of these shrub and hedge trimmer are provided with a front hand grip 1, and its rear portion is provided with a back handle 3, and front hand grip 1 is provided with fixedly connected trigger I 2, and trigger I 2 links together by wire with the execution trigger 10 that is located at casing 9 inside; Back handle 3 is movably connected on the casing 9, this back handle 3 is the U type, one end is movably connected in the casing 9, other end bifurcated forms a main handle 4 and a secondary handle 7, main handle 4 and secondary handle 7 can be held for the operator simultaneously, shown in Fig. 6,7,8,9, the gum cover that is used to increase frictional force and holds sense is installed in the outside of main handle 4 and secondary handle 7; Be provided with trigger II 5 in main handle 4 inside, the movable end of trigger II 5 is towards the junction of back handle 3 with casing 9, and the movable end of trigger II 5 is by wire and 10 interlocks of execution trigger; Be provided with trigger III8 in secondary handle 7 inside, the movable end of trigger III8 is towards the junction of back handle 3 with casing 9, and the movable end of trigger III8 is by wire and 10 interlocks of execution trigger.In casing 9 inside a microswitch 12 is installed also, the actuating range of carrying out trigger 10 can just change the state of microswitch 12.

As shown in Figure 3, casing 9 is provided with five detents 11 with the junction of back handle 3, these five detents 11 are 180 degree and distribute, 45 degree of being separated by between the adjacent positioned groove 11, as shown in Figure 1, main handle 4 also is provided with a cage knob that can be free to slide 13 in the junction with casing 9, this cage knob 13 is provided with the positioning convex 15 of corresponding detent 11 at the end towards casing 9, only at positioning convex 15 during over against any one detent 11, as shown in Figure 2, cage knob 13 positioning convex 15 after casing 9 slippages can reach casing 9 inside, form the interaction relation of back handle 3 and casing 9 thereupon, make back handle 3 freely not rotate, so just kept the connection status between back handle 3 and the casing 9; Shown in Fig. 6,7,8, the stationary state that back handle 3 rotates back and casing 9 has the position at zero degree, 45 degree, 90 degree, 135 degree, 180 degree, the adjustable range of back handle 3 is very big, is enough to satisfy side shearing manipulation generally speaking.Cage knob 13 also is provided with protruding I 14 in the place towards trigger II 5, the movable end of trigger II 5 is provided with protruding II 6, as shown in Figure 1, just be positioned at the hunting range of the movable end of trigger II 5 at the situation lower convexity I 14 of cage knob 13 disengaging housings, trigger II 5 rotates after the certain amplitude that protruding II6 is blocked by protruding I 14 on it, make trigger II 5 can not finish normal rotation, and then trigger II 5 can not change the action of carrying out trigger 10 in the case; As shown in Figure 2, the positioning convex 15 of cage knob 13 inserts in the detent 11, back handle 3 is connected as a single entity with casing 9, the range of movement of the swing process protrusions II 6 of trigger II 5 and protruding I 14 from, trigger II 5 can be rotated significantly, and trigger II 5 finishes and rotates 10 motions of back drive execution trigger.

During work, must guarantee that trigger II 5 can finish normal rotation, could start shrub and hedge trimmer after pulling trigger I 2 or trigger III8 then, as shown in Figure 4, after inserting casing 9 inside, positioning convex 15 pulls trigger II 5, carry out trigger 10 by trigger II 5 pullings and then 12 actions of promotion microswitch, but microswitch 12 movement ranges can not make microswitch 12 electrical communication; As shown in Figure 5, microswitch 12 further moves after trigger I 2 or trigger III8 pull, and makes the microswitch 12 inner electrical communication that form, and shrub and hedge trimmer could startup work.Therefore cage knob 13 also plays outside the effect of playing fixedly back handle 3 and casing 9 and avoids the contingency that causes because of trigger II5 maloperation, makes shrub and hedge trimmer have the safety locking function.After the shrub and hedge trimmer operate as normal, wherein any one resets shrub and hedge trimmer are quit work for trigger I 2, trigger II 5, trigger III8.

Compare with shrub and hedge trimmer in the past, shrub and hedge trimmer of the present invention have two kinds easily, operator scheme easily, a kind of for gripping main handle 4 and front hand grip 1 simultaneously, another kind of for gripping main handle 4 and secondary handle 7 simultaneously.The former, hand holding state firmly evenly can in order to closely, high-intensity operation needs, and can easily realize just that by the angle that changes back handle 3 avris prunes; The latter, hand-held shrub and hedge trimmer rear portion, so the blade scope of activities of shrub and hedge trimmer is bigger, can realize enlarging the purpose of job area with doing that the extension function of shrub and hedge trimmer is really played in eminence or operation at a distance.Simultaneously, back handle 3 is held by both hands and is pinched the thorough mode of operation that has changed shrub and hedge trimmer, alleviate operator's labour intensity greatly, and the reasonable external force of peptizaiton on back handle 3 of back handle 3 energy of U type, annexation between firm back handle 3 and the casing 9, the service life of prolongation shrub and hedge trimmer.

Claims

1, the rotatable shrub and hedge trimmer of a kind of back handle (3), the casing of these shrub and hedge trimmer (9) front portion is provided with front hand grip (1), described front hand grip (1) is provided with trigger I (2), execution trigger (10) interlock that described trigger I (2) is inner with casing (9), described casing (9) rear portion is connected with back handle (3), it is characterized in that: described back handle (3) is the U type, diverge on it and be provided with a main handle (4) and a secondary handle (7), described main handle (4) inside is provided with trigger II (5), the movable end of described trigger II (5) and execution trigger (10) interlock, described secondary handle (7) inside is provided with trigger III (8), and the movable end of described trigger III (8) also links with execution trigger (10).

2, according to the rotatable shrub and hedge trimmer of the described back handle of claim 1 (3), it is characterized in that: described casing (9) is provided with the detent (11) of curved arrangement in the junction with back handle (3), described main handle (4) also is provided with a cage knob that can be free to slide (13) in the junction with casing (9), and described cage knob (13) is provided with the positioning convex (15) of corresponding detent (11) at the end towards casing (9).

3, according to the rotatable shrub and hedge trimmer of the described back handle of claim 1 (3), it is characterized in that: described cage knob (13) is provided with protruding I (14) in the place towards trigger II (5), and the movable end of described trigger II (5) is provided with protruding II (6).