CN201362076Y

CN201362076Y - Chalk sleeve

Info

Publication number: CN201362076Y
Application number: CNU200920019309XU
Authority: CN
Inventors: 李蕙妍
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-17
Filing date: 2009-02-17
Publication date: 2009-12-16
Anticipated expiration: 2019-02-17

Abstract

The utility model discloses a chalk sleeve, and comprises an outer barrel and an inner barrel arranged in the outer barrel, wherein at least one portion of the inner wall of the outer barrel is provided with inner screw threads, the outer wall of the outer barrel is provided with outer screw threads which are matched with the inner screw threads, the inner barrel is provided with a hollow cavity capable of holding chalks, and the middle lower portion of the inner barrel is provided with a depressed portion. The chalk sleeve comprises the inner barrel and the outer barrel which are connected through screw threads, and has simple structure and processing technology. When in use, chalks are only needed to be inserted in the hollow cavity of the inner tube, and the exposed lengths of chalks can be regulated through rotating the occluding distance of the inner barrel and the outer barrel, the chalk sleeve is convenient and practical, does not need to grab chalks directly, and is very sanitary. The depressed portion which is arranged on the middle lower portion of the inner barrel can be convenient for holding the chalk sleeve, and is convenient to use.

Description

Chalk sleeve

(1) technical field

The utility model relates to the daily teaching apparatus, is specifically related to a kind of convenient and practical chalk sleeve that need not directly to catch chalk.

(2) background technology

In the present education activities, people directly hold chalk with hand to write, the easy like this hand of making dirty, and the time has been grown and can hurt skin.

In order to address the above problem, No. 200610028126.5 patent of invention of State Intellectual Property Office discloses a kind of chalk sleeve and comprised housing body, push rod, clamp mechanism, described housing body is the hollow structure that inside has projection, its front end is a clamp mechanism, in housing body and clamp mechanism junction external screw thread is arranged; Push rod inserts from the rear end of housing, and the front end of described push rod has fixture block, matches with the projection of housing and plays the effect of location; Described clamp mechanism is positioned at the front end of housing body, the sliding sleeve that comprises jaw and tool internal thread, described jaw is made of the intermediate plate of 3 pyramidal structures, described sliding sleeve front end is also tapered, be complementary with the taper of jaw, described sliding sleeve internal thread can be meshed with the external screw thread of an annulus of pen cap front end.Though said structure addresses the above problem, complex structure, each component processing method complexity, the cost that has increased teaching aid is not very practical.

(3) summary of the invention

The technical problems to be solved in the utility model has provided a kind of convenient and practical chalk sleeve that need not directly to catch chalk.

The utility model is realized by following measure:

A kind of chalk sleeve comprises urceolus and is positioned at its inner core that wherein outer tube inner wall has at least a part to be provided with internal thread, and inner tank theca is provided with the external screw thread that matches with internal thread, and inner core is provided with the cavity that can hold chalk, and this inner core middle and lower part is provided with depressed part.

The beneficial effects of the utility model:

1. comprise urceolus and inner core by being threaded, simple in structure, processing technology is simple, only chalk need be inserted in the cavity of inner core during use, just can adjust the length that chalk exposes by the interlock distance of rotation inner core and urceolus, convenient and practical, and do not need directly to catch chalk, very health.

2. the inner core middle and lower part is provided with depressed part, can conveniently hold chalk sleeve, and is easy to use.

(4) description of drawings

Fig. 1 is the structural representation of the selected embodiment of the utility model.

1 urceolus among the figure, 2 inner cores, 3 chalks.

(5) specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, following explanation only is exemplary, does not limit protection domain of the present utility model.

A kind of as shown in Figure 1 chalk sleeve, comprise urceolus 1 and be positioned at its inner core 2, wherein urceolus 1 inwall has at least a part to be provided with internal thread, and inner core 2 outer walls are provided with the external screw thread that matches with internal thread, and inner core 2 is provided with the cavity that can hold chalk 3, and these inner core 2 middle and lower parts are provided with depressed part 3.

Add urceolus 1 in man-hour, inner core 2 can select for use elastomeric material to make.

Claims

1. chalk sleeve, it is characterized in that: comprise urceolus (1) and be positioned at its inner core (2), wherein urceolus (1) inwall has at least a part to be provided with internal thread, inner core (2) outer wall is provided with the external screw thread that matches with internal thread, and inner core (2) is provided with the cavity that can hold chalk (3), and this inner core (2) middle and lower part is provided with depressed part (3).