CN2494111Y

CN2494111Y - Flat tube extension mechanism for tree shears

Info

Publication number: CN2494111Y
Application number: CN 01227932
Authority: CN
Inventors: 王耀钦
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-20
Filing date: 2001-06-20
Publication date: 2002-06-05
Anticipated expiration: 2011-06-20

Abstract

A flat-tube extending and contracting mechanism for a pruner is characterized in that: an internal tube and an external tube are all hollow flat tubes; the regulation end of the external tube is provided with a button frame which is pin-connected with a zigzag-shaped button. The upper arm of the button is exposed outside the button frame and the lower arm thereof is opened with a long hole inside which a lockpin is sleeved. The top surface of the lockpin is opposed with a spring whose top part is provided with a cover. A position sleeve is arranged on the outside wall of the regulation end of the internal pipe. The inner wall on one side of the position sleeve is provided with a mushroom-shaped button and the inner wall on the other side thereof is provided with a pit that is buckled with the button. The position sleeve, provided with a long opening slot, is provided with a plurality of position holes on the inner tube wall. The utility model is strong in bending resistance, convenient, rapid, easy and accurate in handle adjusting and long in service life.

Description

Shrub and hedge trimmer flat tube telescoping mechanism

The utility model relates to shrub and hedge trimmer, and especially a kind of flat tube telescoping mechanism that is used for shrub and hedge trimmer is applicable to gardens pruning etc.

Its handle of existing shrub and hedge trimmer has fixed, also have telescopic, wherein the telescopic shrub and hedge trimmer of handle generally all are the pipe handles, its stretching structure has and adopts eccentric throw to add friction, an eccentric nahlock is adorned in termination as pipe in hollow, overlap a different annulus of thickness along the circumferential direction on the eccentric shaft of eccentric nahlock again, the outer wall of annulus contacts with outer tube wall, when inner and outer pipes rotates mutually,, cause annulus not change because of annulus outer wall and outer tube wall have friction, and eccentric nahlock rotates with interior pipe, because of eccentric throw is arranged, then rise stubborn more tight more, thereby tighten two pipes.The shortcoming that said structure exists is: 1) pipe is flexible, because of pipe easily curved when stressed, the just not flexible of crooked back; 2) the relative rotary manipulation of inner and outer pipes is convenient and swift inadequately, and eccentric throw adds the friction locking time with easy to wear long afterwards, is difficult to locking.

The purpose of this utility model just provides a kind of shrub and hedge trimmer flat tube telescoping mechanism, and not only bending resistance is strong to make this shrub and hedge trimmer handle, and the scalable adjusting arm of force, convenient and swift during regulating handle length, easily accurate, telescoping mechanism is rational in infrastructure, assembling is easy, long service life.

The technical scheme that realizes the utility model purpose is: shrub and hedge trimmer flat tube telescoping mechanism, contain outer tube, interior pipe, its design feature is that inner and outer pipes is hollow oblate pipe, outer tube adjustable side outer wall is equipped with the button frame, the lower end, top of the frame button of bearing pin pin joint one " it " font, and the button upper arm exposes the button frame, lower arm ends is opened a slotted hole, be with lock pin in it, the end face of lock pin has spring, and a lid is pressed in the spring upper end; Interior pipe adjustable side outer wall is equipped with involutory positioning sleeve, one side positioning sleeve inwall is shaped on boss, its top is the button of mushroom-shaped, opposite side positioning sleeve inwall also is shaped on boss, its top has the hole that is interlocked with above-mentioned button, the positioning sleeve front center is provided with the opening elongated slot, and interior pipe has a plurality of locating holes on the axis tube wall that telescoping mechanism one side is housed.

Boss that positioning sleeve described in the utility model is provided with and the hole on the boss or be buckled with two pairs, boss passes from the tube wall of interior pipe, and button and hole fasten the back and form a complete positioning sleeve, and the top of cover forms elliptical aperture.

Advantage and effect that the utility model is compared with prior art had are: because the handle of these shrub and hedge trimmer adopts oblate pipe to make, then bending resistance is strong, stressed not flexible, telescoping mechanism is housed on the handle, the adjustable force arm, telescoping mechanism is a spring button slide lock fixed pattern, and convenient and swift during adjusting, easily accurate, telescoping mechanism is rational in infrastructure, assembling is easy, long service life.

To and contrast accompanying drawing by embodiment below is described specifically the utility model:

Main cutaway view when Fig. 1 is the utility model spring relaxation.

Fig. 2 is that the utility model button is pressed the main cutaway view when regulating.

Fig. 3 is the local main cutaway view during two positioning sleeve fastenings among Fig. 1.

Fig. 4 is the vertical view of Fig. 3.

Fig. 5 is the left view of Fig. 3.

Fig. 6 is that the utility model is used in the schematic diagram on the shrub and hedge trimmer.

As shown in the figure, present embodiment be loaded on shrub and hedge trimmer handle outer tube 1 and interior pipe 2 in conjunction with adjusting place, a button frame 3 is adorned in adjustable side (termination) at outer tube, the tail end of button frame props up the end of outer tube 1, live by bearing pin 5 and sell the button 4 of one " it " font in the first half lower end of button frame, the upper arm of button exposes the button frame slightly, be convenient to finger and press, and the underarm of button has slotted hole 4-1 in the termination, be with lock pin 8 in the slotted hole, the lock pin end face is equipped with spring 7, spring upper end is pushed down with covering 6, and covering 6 tops is the plectanes that flush with the button top of support, two card bases is arranged below the plectane, to cover after spring installs toward next and promptly catch on the inwall of button frame by, card base.Positioning sleeve is equipped with in adjustable side (termination) at interior pipe 2, positioning sleeve involutes by two, every and outer wall of inner tube applying, be shaped on two boss 9-1,10-1 on every positioning sleeve of this example, wall within the pipe in boss passes, the button 10-2 that has mushroom-shaped on the one side positioning sleeve boss, have the hole 9-2 that is complementary with above-mentioned button on the opposite side positioning sleeve boss, be about to the complete positioning sleeve of fitting fully with outer wall of inner tube of two positioning sleeves synthetic after button and the involutory fastening in hole, form an elliptical aperture on its top, the effect of positioning sleeve is: prevent that 1) inner and outer pipes from pulling separation fully; 2) fill the inner and outer pipes slit, can excessively not rock; 3) install positioning sleeve additional after, inner and outer pipes is not the contact of direct face, but point, line contact, little, the easy pulling of friction, prevents inner and outer pipes surface scratch.Interior pipe is gone up and is had along the axis and the corresponding a plurality of locating hole 2-1 of lock pin in the side that lock pin 8 is housed.

The operation principle of present embodiment is: when needs regulating handle length, press the button 4 of " it " font, effect knob down underarm in lever principle upwarps, locating hole 2-1 in drive lock pin 8 leaves on the pipe, button frame 3 and outer tube 1 just can slide front and back, at this time release button can spring under the effect of spring 7 among the corresponding locating hole 2-1 automatically as long as slide to needed position lock pin, pins inner and outer pipes once more.When managing tail end in being pulled to, 8 of lock pins slip among the opening elongated slot 10-3 that offers on the positioning sleeve 10, and when lock pin slided to the top of elongated slot, the afterbody of button frame 3 just in time withstood the outer 10-4 of positioning sleeve, can not just avoid the possibility of the complete slippage of interior overcoat again to advancing slip.

Claims

1. shrub and hedge trimmer flat tube telescoping mechanism, contain outer tube (1), interior pipe (2), it is characterized in that: inner and outer pipes is hollow oblate pipe, outer tube (1) adjustable side outer wall is equipped with button frame (3), the lower end, top of the frame button (4) of bearing pin (5) pin joint one " it " font, and the button upper arm exposes button frame (3), lower arm ends is opened a slotted hole (4-1), be with lock pin (8) in it, the end face of lock pin has spring (7), and a lid (6) is pressed in the spring upper end; Interior pipe (2) adjustable side outer wall is equipped with involutory positioning sleeve (9,10), one side positioning sleeve inwall is shaped on boss (10-1), its top is the button (10-2) of mushroom-shaped, opposite side positioning sleeve inwall also is shaped on boss (9-1), its top has the hole (9-2) that is interlocked with above-mentioned button (10-2), the positioning sleeve front center is provided with opening elongated slot (9-3,10-3), and interior pipe (2) has a plurality of locating holes (2-1) on the axis tube wall that telescoping mechanism one side is housed.

2. shrub and hedge trimmer flat tube telescoping mechanism according to claim 1, it is characterized in that: boss (9-1,10-1) that described positioning sleeve (9,10) is provided with and the hole (9-2) on the boss or button (10-2) have two pairs, boss passes from the tube wall of interior pipe (2), button and hole fasten the back and form a complete positioning sleeve, and the top of cover forms elliptical aperture.