CN2936773Y

CN2936773Y - Step chalk holder

Info

Publication number: CN2936773Y
Application number: CN 200620123412
Authority: CN
Inventors: 李树本
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-03
Filing date: 2006-08-03
Publication date: 2007-08-22
Anticipated expiration: 2016-08-03

Abstract

The utility model relates to a step push chalk sleeve, which comprises a pen shell and a stop part. A serration shaped guide groove through an inner and an outer shell is longitudinally positioned on the upper of the pen shell, a stop retaining spring is arranged on a stop part; the stop retaining spring adopts the structure that two petal opening springs are arranged at the lower of the stop retaining spring, and each opening spring is provided with an outward convex section. A containing chalk opening hole is positioned at the lower of the stop part for holding the chalk.

Description

The step-by-step movement chalk sleeve

Technical field

The utility model relates to a kind of chalk sleeve, but the chalk sleeve that especially a kind of step-by-step movement advances.

Background technology

Chalk is that the teacher teaches knowledge, student's necessary tool that absorbs knowledge.Can produce dust at traditional chalk, chafe, shortcoming such as unhygienic and fracture has easily had a lot of people that traditional chalk is improved.Wherein a kind of improvement is to use chalk sleeve.

The utility model content

The purpose of this utility model is that it is simple to have proposed a kind of manufacturing process, with low cost, chalk sleeve easy to use at the shortcoming in the chalk sleeve design of using in the prior art.

But the advantage of the utility model chalk sleeve is the chalk step-by-step movement and advances.

For achieving the above object, the utility model adopts following technical scheme:

The utility model chalk sleeve adopts macromolecular material, and plastics for example are so that reduce cost.Chalk sleeve comprises pen cap shell and ends into part.Pen cap shell upper housing is a hollow cylindrical, can hold chalk and end into part, and inside flange is arranged at the top of upper body, deviates from from the top to prevent to end into part.Vertically be provided with the inside and outside zigzag gathering sill that connects on the upper body.Pen cap outer casing underpart housing forms the pen mouth, and a pen mouthful diameter reduces gradually, slightly is down truncated cone shape.End into forming one on the part and end into jump ring, end into the structure of jump ring and be forming two lobe opening springs below the elastic arm, each opening spring has outside projection.End the open pore that contains that part bottom into is provided for the clamping chalk.

A pen mouthful front end can be installed a rubber ring, plays fastening chalk.

For ease of carrying, a clamp can also be set, on shell so that be clipped in the coat pocket as pen.

Description of drawings:

Fig. 1: chalk sleeve shell schematic diagram

Fig. 2: end into part front view

Fig. 3: end into part side view

Fig. 4: the chalk sleeve schematic diagram that assembles

The specific embodiment

The utility model chalk sleeve adopts macromolecular material (for example plastics) to make, so that reduce cost.

The structure of chalk sleeve:

Chalk sleeve comprises pen cap shell 1 and ends into part 8.The upper body 2 of pen cap shell 1 is a hollow cylindrical, can hold chalk and end into part 8, and the flange of inside extension is arranged at the top of upper body 2, deviates from from the top to prevent to end into part 8.Vertically be provided with the zigzag gathering sill 3 of inside and outside perforation on the upper body 2, pen cap outer casing underpart housing 4 forms pen mouth 4, and the diameter of pen mouth 4 reduces gradually, slightly is down truncated cone shape, as shown in Figure 1.

End into that part 8 overall profile are cylindrical, the internal diameter of its external diameter and chalk sleeve shell 1 is corresponding, and part can insert in the shell to guarantee ending into.End into part 8 tops and be one and end into jump ring 9 that the bottom is a chalk hold assembly 10.End into that jump ring 9 comprises the two lobe opening springs 12 that an elastic arm 11 and elastic arm form below, each opening spring 12 has outside projection 13, is used for making at the zigzag gathering sill ending into part location, (as shown in Figure 2).End the side view of part into as can be seen from Fig. 3, under free state, opening spring 12 outwards protrudes from and ends the into cylinder profile of part, when lower compression opening spring 12, its indentation is ended in the cylindrical profile of part, end in the process of part in installation like this, can make and end into that thereby part 8 is pushed in the pen cap shell 1 by pen mouth 4 as long as push opening spring 12 downwards, end after into part 8 enters pen cap shell 1, ending into jump ring 9 upsprings, opening spring 12 stretches out shell from gathering sill, the projection 13 of opening spring 12 and the engagement of gathering sill 3 realize ending the into location of part.

End into that the part bottom is provided with chalk hold assembly 10, for the ease of chalk is installed, clamping chalk parts are arranged to the open pore of pintongs.

The front end of pen mouth 4 can be installed a rubber ring 14, plays fastening chalk.

For ease of carrying, a clamp 5 can also be set, on shell 1 so that be clipped in the coat pocket as pen.

The assembling of chalk sleeve:

To end into the opening spring of part 8 during assembling and push downwards, and end into that part 8 will be advanced in the shell 2 by pen mouth 4 thereby make, and end into jump ring 9 and upspring, opening spring 12 stretches out shell from gathering sill, and expression ends into that part 8 installs to normal operation position.

The use of chalk sleeve:

During use, chalk is inserted in the chalk hold assembly 10 end part 8 front ends into, two lobe opening springs of the opening spring 12 of part 8 pinch to the centre with ending into, make it to break away from the sawtooth of zigzag gathering sill, pull back then and end into part 8, thereby regulate the length that chalk stretches out pen mouthful, the length that chalk is stretched out is the 7-8 millimeter, this length be fit to that chalk writes length.Chalk exhausts in the use, and then available thumb promotes to end into part 8 forward, makes opening spring 12 move to next sawtooth place, and chalk is stretched out, and continues to write.

Claims

1. chalk sleeve, comprise pen cap shell (1) and end into part (8), the upper body (2) of pen cap shell (1) is a hollow cylindrical, can hold chalk and end into part (8), the flange of inside extension is arranged at the top of upper body (2), deviate from from the top to prevent to end into part 8, vertically be provided with the inside and outside zigzag gathering sill (3) that connects on the upper body (2), the lower case of pen cap shell forms pen mouthful (4), the diameter of pen mouth reduces gradually, slightly be down truncated cone shape, ending into, the last formation one of part (8) ends into jump ring (9), end into that jump ring (9) comprises the two lobe opening springs (12) that an elastic arm (11) and elastic arm form below, each opening spring has outside projection (13), and ending into, the part bottom is provided with chalk hold assembly (10).

2. chalk sleeve as claimed in claim 1 is characterized in that: the front end of pen mouthful (4) can be installed a rubber ring (14), plays fastening chalk.

3. chalk sleeve as claimed in claim 1 is characterized in that: for ease of carrying, can also a clamp (5) be set on upper case (2), so that be clipped in the coat pocket as pen.

4. chalk sleeve as claimed in claim 1 is characterized in that: chalk hold assembly (10) is arranged to the open pore of pintongs, with the convenient chalk of installing.

5. chalk sleeve as claimed in claim 1 is characterized in that: part all adopts plastics to make to pen cap shell with ending into.