CN201604409U

CN201604409U - Chalk pusher

Info

Publication number: CN201604409U
Application number: CN2010201165511U
Authority: CN
Inventors: 吴中华; 王昕�
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-02-10
Filing date: 2010-02-10
Publication date: 2010-10-13
Anticipated expiration: 2020-02-10

Abstract

The utility model discloses a chalk pusher, which comprises a sleeve, wherein a push core is screwed in the sleeve, a groove is formed on the push core, a sleeve head is connected to the front end of the sleeve, a handle is ratably connected with the rear end of the sleeve, a tongue piece extending to the inner chamber of the sleeve and passing through the groove is fixedly connected to the handle, and a spring plate is mounted in the sleeve head; a dust passage is formed between the push core and the inner wall of the sleeve, and a dust outlet is formed on the sleeve wall at the rear end part of the sleeve. The chalk pusher has the advantages of low probability of fracture when the chalk is pushed out for writing.

Description

The chalk propeller

Technical field

The utility model relates to the utensil that a kind of chalk of packing into also can be extrapolated with chalk, is a kind of chalk propeller specifically.

Background technology

In order to prevent that chalk from causing fracture and as far as possible chalk is used up in writing process, the chalk sleeve (folder) of many types has appearred in the reality, and have and also claim the chalk propeller chalk sleeve of the extrapolated function of chalk (folder).At present, most representative a its basic structure of chalk propeller is as follows: it comprises sleeve, is bolted with in the sleeve to push away core, push away core and be provided with groove, the front end of sleeve is connected with pullover, and the rear end of sleeve is rotatably connected to handle, the affixed tongue piece that stretches into barrel bore and pass groove on the handle.Turning handle can be stirred by tongue piece and push away core and rotate in sleeve, pushes away core and rotates the back and just can realize pushing away core moving forward and backward along tongue piece.The chalk propeller of said structure, its tongue piece and groove coincide, promptly push away core barrel bore is divided into two sections of disconnected front and back, chalk is pushed out the powder that produces in the process and all stays in the ante-chamber section, pushes away powder in the core reach process and can fill up gap between screw thread, causes easily to push away core and rotate smooth even get stuck, in addition, because there are the gap in chalk and pullover, chalk rocks easily when writing, thereby causes the chalk head to rupture easily.

The utility model content

The technical problems to be solved in the utility model is at above-mentioned defective, and the not chalk propeller of easy fracture of smooth release of a kind of chalk energy quilt and chalk head is provided.

The utility model is by the following technical solutions to solve the deficiencies in the prior art, the chalk propeller that is provided, comprise sleeve, be bolted with in the sleeve and push away core, push away core and be provided with groove, the front end of sleeve is connected with pullover, and the rear end of sleeve is rotatably connected to handle, the affixed tongue piece that stretches into barrel bore and pass groove on the handle, its design feature are describedly shell fragment to be housed in pullover; Push away being provided with the dust passage between core and the sleeve lining, the barrel at sleeve rear end position is provided with dust export.

Described dust passage is that tongue piece and groove bottom land are or/and the gap between tongue piece and the sleeve lining.

The described core that pushes away is plugged with core print towards a pullover end.

The chalk propeller of said structure, because pushing away the barrel that is provided with dust passage and sleeve rear end position between core and the sleeve lining is provided with dust export, the powder that chalk produces at the barrel bore leading portion can flow to the position, rear end of barrel bore and discharges from dust export through the dust passage, powder can not fill up the gap between screw thread, therefore, pushing away core can rotate flexibly; Owing in pullover shell fragment is housed, shell fragment can not stop moving axially of chalk again, but can bring the effect of radially rocking of restriction chalk.

In sum, the utility model can rotate flexibly because of it pushes away core, releases smooth advantage thereby had chalk, again because of shell fragment can limit radially rocking of chalk, thereby has had when writing the not advantage of easy fracture of chalk head.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the cutaway view along A-A line among Fig. 1.

The specific embodiment

As depicted in figs. 1 and 2, the chalk propeller comprises sleeve 1, be bolted with in the sleeve 1 and push away core 3, push away core 3 and be provided with groove 4, the front end of sleeve 1 is bolted with pullover 2, shell fragment 9 is housed in pullover 2, the rear end of sleeve 1 is rotatably connected to handle 5, is connected with tongue piece 6 on the handle 5, and tongue piece 6 stretches to sleeve 1 inner chamber front end after passing groove 4, stir when tongue piece 6 rotates with handle 5 and push away core 3 rotations, the result who pushes away core 3 rotations moves axially in sleeve 1 along tongue piece 6.Push away core 3 and be plugged with core print 8, the back end in contact of core print 8 and chalk 10 towards an end of pullover 2.The barrel at position, sleeve 1 rear end is provided with dust export 7, pushes away between core 3 and sleeve 1 inwall and is provided with the dust passage.The dust passage can form like this, promptly between tongue piece 6 and groove 4 bottom lands, leave the gap, or between tongue piece 6 and sleeve 1 inwall, leave the gap, or not only left the gap between tongue piece 6 and groove 4 bottom lands but also between tongue piece 6 and sleeve 1 inwall, left the gap, above-mentioned gap is the dust passage.

Claims

1. chalk propeller, comprise sleeve (1), be bolted with in the sleeve (1) and push away core (3), push away core (3) and be provided with groove (4), the front end of sleeve (1) is connected with pullover (2), the rear end of sleeve (1) is rotatably connected to handle (5), and handle (5) is gone up the affixed tongue piece (6) that stretches into sleeve (1) inner chamber and pass groove (4), it is characterized in that being equipped with in described pullover (2) shell fragment (9); Push away between core (3) and sleeve (1) inwall and be provided with the dust passage, the barrel at sleeve (1) position, rear end is provided with dust export (7).

2. chalk propeller according to claim 1 is characterized in that described dust passage is that tongue piece (6) and groove (4) bottom land are or/and the gap between tongue piece (6) and sleeve (1) inwall.

3. chalk propeller according to claim 1 and 2 is characterized in that the described end of core (3) towards pullover (2) that push away is plugged with core print (8).