CN200988365Y

CN200988365Y - Rear rotary telescopic type mechanical propelling pencil

Info

Publication number: CN200988365Y
Application number: CN 200620010350
Authority: CN
Inventors: 田玉国
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-29
Filing date: 2006-09-29
Publication date: 2007-12-12
Anticipated expiration: 2016-09-29

Abstract

The utility model discloses a back spin telescopic type automatic pencil, comprising a casing (1), a pencil casing head (2), a pencil casing cap (3), and a pencil casing cover (4). The casing (1) is connected with the pencil casing head (2) as a whole, the pencil casing cover (4) is fixed on the back end opening of the casing (1). The utility model is characterized in that a pencil back end spin telescopic device (5) is equipped at the back end of the casing (1), the inner ring of the pencil back end spin telescopic device (5) is clipped the upper end of the outer containment casing (6) of the pencil lead. The structure of the back spin telescopic type automatic pencil is simple and the operation is easy; because the containment casing is equipped on the pencil lead, even if the pencil lead is long, the pencil lead is not broken off; due to the paper characteristic containment casing is used, the lumber is saved, being beneficial to the generalization of the paper characteristic pencil. Due to a thread pushing mechanism is arranged at the end of the pencil and telescoped through rotating, making the excess of the pencil least; a sharpener is equipped in the pencil casing cap, thereby the pencil cutting is convenient.

Description

Back rotary and telescopic propelling pencil

Technical field

The utility model relates to a kind of improvement of pencil, specifically a kind of back rotary and telescopic propelling pencil.

Background technology

Pencil is one of indispensable stationery of student, also is one of stationery of using always of engineers and technicians, and according to incompletely statistics, national annual consumption is about 5,000,000,000, and consumption is very big.And its shell of pencil that uses at present mostly is six stupefied wooden shells greatly, so expend a large amount of timber every year, is the use amount of minimizing timber, and what have begins to develop paper shell pencil.The paper shell pencil of being produced at present can be saved timber, and its housing is circular.Present employed propelling pencil has multiple, mostly by a shell, nib, pen core, refill expansion mechanism constitutes, on nib, be provided with clamp port, what have in the inboard of nib has established clamping pearl and spring, there is driving in its refill expansion mechanism, also has screw typely, and it is spiral to be to adopt screw rod, the front end of screw rod pushes pen core, pen core is stretched out, and the retraction of pen core depends on spring reset to realize, therefore the clamping device of pen core also will be arranged, make the complex structure of handwriting, in addition, its pencil part of present employed propelling pencil is a pen core entirely, no involucrum, because pen core is thinner, longer, so be easy to fracture, because the paper bag shell is not used in the pen core outside, so be unfavorable for the popularization of paper shell pencil, the problem of solution timber waste that therefore, also just can not be a large amount of.

Summary of the invention

It is a kind of in rear end rotation that the purpose of this utility model is to provide, and pencil is flexible from front end, can be beneficial to paper shell pencil popularization, save timber, pen core not frangibility and back rotary and telescopic propelling pencil simple in structure.

For reaching above purpose, the technical scheme that the utility model adopted is: this back rotary and telescopic propelling pencil, by housing, shell head, shell cap, cap constitutes, a housing and a shell head are connected to an integral body, shell head is a taper, the center of shell head is that pencil stretches out the hole, cap is fixed on the rear port of housing, it is characterized in that establishing pencil rear end rotary extension device in the rear end of housing, the upper end that the interior ring of pencil rear end rotary extension device blocks the pencil-lead outer envelope, by Propelling pencil with sharpener in cap rear end rotary extension device, promote or spur the rear end of pencil, pencil stub is stretched out or indentation.The utility model is also implemented by following measure: described pencil rear end rotary extension device, by screw shell, dicyclo is from movable snail sleeve, guide cylinder constitutes, guide cylinder is two semicircular cylinders, the lower end is fixedly connected on the inner face of shell head, the screw shell of between guide cylinder and housing, packing into, driven conforming to a conventional pattern of dicyclo inserts from guide cylinder top, dicyclo is in movable snail sleeve, fixed connecting plate between the outer shroud is stuck between two semicircular cylinders of guide cylinder, the length of screw shell is consistent with the length of housing inner chamber, pack into and push down with a cap behind the screw shell, prevent that the reaction force of screw shell when rotation promotes pencil from stretch out screw shell, screw shell can pinch rotation with finger, owing to be to rotate from the pencil rear end to stretch out forward, so can make the rear end of pencil shift the end onto always, make the surplus of pencil reach minimum, be that the 10-15mm place establishes and refers to revolve window in the upper end of housing far from the end, the sliding line of on the outer wall of the screw shell that refers to revolve the window place, can setting up defences, the outer shroud screw thread of dicyclo from the movable snail sleeve and the internal thread engagement of screw shell, dicyclo is from the interior ring screw thread of movable snail sleeve and the polymer cover engages fixed of pencil-lead outer envelope upper end, revolve window with finger by finger and press the screw shell rotation, dicyclo vertically moves from movable snail sleeve along guide cylinder, thereby it is vertical flexible that pencil is done; Be provided with sharpener in a shell cap, sharpener is 75 degree with the angle of a shell cap bottom surface; Described pencil-lead outer envelope is the papery shell, for cylindric, polymer cover on the bonding of the upper end of pencil-lead outer envelope is established left hand thread in the outside of polymer cover, the length of left-handed thread section is 1/2 of polymer cover length, is the pencil special with pencil rear end rotary extension matched with devices.When using the utility model, pencil can be inserted in the centre bore of a cap, left-handed polymer cover can be fixed on the polymer cover dicyclo from the interior ring of movable snail sleeve, when clockwise rotating housing cutting pencil by customary way, it is more firm encircling in movable snail sleeve that pencil is subjected to backward-acting power will make polymer be enclosed within dicyclo, avoids pencil upwards rotated by reverse reaction force and deviate from.

The beneficial effects of the utility model are: compare with the propelling pencil of present use, and simple in structure, easy to use; Owing on pencil-lead, be with involucrum, so though pen core is grown also not frangibility; Adopt the papery involucrum owing to be beneficial to,, be beneficial to the popularization of paper shell pencil so can save timber; Because the screw thread pushing mechanism is located at the rear end of pencil, and flexible by rotating, can make pencil surplus minimum; Owing in a shell cap, established sharpener, thus make sharpen a pencil convenient.

Description of drawings

Fig. 1 cuts open schematic diagram for the utility model structure master office of looking.

Fig. 2 is the axis cross-sectional schematic of the utility model along housing.

Fig. 3 analyses and observe enlarged diagram for the utility model along Figure 1A-A.

Fig. 4 analyses and observe enlarged diagram for the utility model along Fig. 2 B-B.

Fig. 5 overlooks enlarged diagram for the utility model cap.

Fig. 6 overlooks enlarged diagram for the utility model dicyclo from movable snail sleeve.

The specific embodiment

Make the utility model with reference to accompanying

drawing

1,2,3,4,5,6.This back rotary and telescopic propelling pencil, constitute by housing 1, a shell head 2, a shell cap 3, a cap 4, a housing 1 and a shell head 2 are connected to an integral body, shell head 2 is a taper, the center of shell head 2 is that pencil stretches out the hole, cap 4 is fixed on the rear port of housing 1, establishes pencil rear end rotary extension device 5 in the rear end of housing 1, the upper end that the interior ring of pencil rear end rotary extension device 5 blocks pencil-lead outer envelope 6.Described pencil rear end rotary extension device 5, by screw shell 51, dicyclo is from movable snail sleeve 52, guide cylinder 53 constitutes, guide cylinder 53 is two semicircular cylinders, the lower end is fixedly connected on the inner face of shell head 2, the screw shell 51 of between guide cylinder 53 and housing 1, packing into, dicyclo inserts on 53 tops from movable snail sleeve 52 from guide cylinder, dicyclo is in movable snail sleeve 52, fixed connecting plate 54 between the outer shroud is stuck between two semicircular cylinders of guide cylinder 53, the length of screw shell 51 is consistent with the length of housing 1 inner chamber, be that the 10-15mm place establishes and refers to revolve window 7 in the upper end of housing 1 far from the end, the sliding line of on the outer wall of the screw shell 51 that refers to revolve window 7 places, can setting up defences, the outer shroud screw thread of dicyclo from the movable snail sleeve 52 and the internal thread engagement of screw shell 51, dicyclo overlaps 9 engages fixed from the interior ring screw thread of movable snail sleeve 52 and the polymer of pencil-lead outer envelope 6 upper ends; Be provided with sharpener 8 in a shell cap 3, sharpener 8 is 75 degree with the angle of shell cap 3 bottom surface; Described pencil-lead outer envelope 6 is the papery shell, and for cylindric, polymer cover 9 on the bonding of the upper end of pencil-lead outer envelope 6 is established left hand thread in the outside of polymer cover 9, the length of left-handed thread section be polymer overlap 9 length 1/2.

Claims

1, a kind of back rotary and telescopic propelling pencil, constitute by housing (1), a shell head (2), a shell cap (3), a cap (4), a housing (1) and a shell head (2) are connected to an integral body, shell head (2) is a taper, the center of shell head (2) is that pencil stretches out the hole, cap (4) is fixed on the rear port of housing (1), it is characterized in that establishing pencil rear end rotary extension device (5) in the rear end of housing (1), the interior ring of pencil rear end rotary extension device (5) blocks the upper end of pencil-lead outer envelope (6).

2, back according to claim 1 rotary and telescopic propelling pencil, it is characterized in that described pencil rear end rotary extension device (5), by screw shell (51), dicyclo is from movable snail sleeve (52), guide cylinder (53) constitutes, guide cylinder (53) is two semicircular cylinders, the lower end is fixedly connected on the inner face of shell head (2), the screw shell (51) of between guide cylinder (53) and housing (1), packing into, dicyclo inserts from guide cylinder (53) top from movable snail sleeve (52), dicyclo is in movable snail sleeve (52), fixed connecting plate between the outer shroud (54) is stuck between two semicircular cylinders of guide cylinder (53), the length of screw shell (51) is consistent with the length of housing (1) inner chamber, be that the 10-15mm place establishes and refers to revolve window (7) in the upper end of housing (1) far from the end, the sliding line of on the outer wall that refers to revolve the screw shell (51) that window (7) locates, can setting up defences, the outer shroud screw thread of dicyclo from the movable snail sleeve (52) and the internal thread engagement of screw shell (51), dicyclo polymer cover (9) engages fixed on the interior ring screw thread of movable snail sleeve (52) and the pencil-lead outer envelope (6).

3, back rotary and telescopic propelling pencil according to claim 1 is characterized in that being provided with sharpener (8) in a shell cap (3).

4, back rotary and telescopic propelling pencil according to claim 1 and 2, it is characterized in that described pencil-lead outer envelope (6) is the papery shell, for cylindric, bonding goes up polymer cover (9) in the upper end of pencil-lead outer envelope (6), establishes left hand thread in the outside of polymer cover (9).