CN204894869U

CN204894869U - Double -colored chalk of adjustable length

Info

Publication number: CN204894869U
Application number: CN201520579992.8U
Authority: CN
Inventors: 卢胜德; 徐建中; 张宗标; 宋士勤; 唐树乔
Original assignee: Bozhou Teachers College
Current assignee: Bozhou Teachers College
Priority date: 2015-07-29
Filing date: 2015-07-29
Publication date: 2015-12-23
Anticipated expiration: 2025-07-29

Abstract

The utility model relates to a double -colored chalk of adjustable length, including the rubber pen socket and refill, set up a chamber of installation refill in the rubber pen socket, and the end of the rubber pen socket sets up adjust knob, adjust knob is connected with the rotary disk center that sets up in the rubber pen socket, the rotary disk leans on edge symmetry in both sides to set up the screw rod perpendicularly, the refill sets up the intracavity between the bisymmetry screw rod, and the front end of refill stretches out from a chamber front side of the rubber pen socket. The utility model discloses convenient to use, and avoid with refill direct contact, reduced dust pollution, and the refill stretches out the fully adjustable of the rubber pen socket, reduced the chalk rupture condition, avoid extravagant, and the chalk comprises two kinds of colours, made things convenient for teacher's use of imparting knowledge to students.

Description

A kind of adjustable length Two color chalk

Technical field

The utility model relates to teaching aid technical field, particularly relates to a kind of adjustable length Two color chalk.

Background technology

In teachers ' teaching, chalk is absolutely necessary; but because chalk surface dust is many; gone up one after class teacher often because holding chalk, full hand turns white; cause dust pollution, simultaneously chalk in the past in use often occurs situation about fractureing causing waste; use inconvenience; and existing chalk mostly is the chalk of solid color, need during special marking often to change chalk, chalk color selecting is limited.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of adjustable length Two color chalk, chalk is made up of the rubber pen cap and pen core two parts, easy to use, and avoids directly contacting with pen core, decrease dust pollution, and pen core stretches out the adjustable in length of the rubber pen cap, decrease chalk and to fracture situation, avoid waste, and chalk is made up of two kinds of colors, facilitates teachers ' teaching and use.

The utility model is achieved through the following technical solutions: a kind of adjustable length Two color chalk, comprise the rubber pen cap and pen core, a chamber of installing pen core is set in the described rubber pen cap, and the end of the rubber pen cap arranges adjusting knob, described adjusting knob is connected with the rotating disc center be arranged in the rubber pen cap, described rotating disc arranges screw rod by both sides of the edge Symmetrical vertical, and described pen core is arranged in the chamber between two symmetrical screws, and the front end of pen core is stretched out on front side of a chamber of the rubber pen cap.

Further, the described rubber pen cap is up-small and down-big cylinder, and the surface uniform of the rubber pen cap arranges several circle grooves.

Further, described chamber is communicated with is formed by front cavity, middle cavity, rear chamber, and described front cavity size and pen core size dimension match, and described rotating disc is arranged in rear chamber, and described screw rod is arranged on middle cavity both sides.

Further, the rearward end of described pen core for connecting head, and connects head and arranges the skewed slot connected with screw flight groove, and pen core centrally axis be divided into left half of core body and right half of core body, described left half of core body is different with the color of right half of core body.

Compared with prior art, the beneficial effects of the utility model are: chalk of the present utility model adopts the rubber pen cap and is sleeved on pen core two parts composition in the pen cap, avoid and contact with the direct of pen core, decrease dust pollution, and the rubber pen cap is up-small and down-big cylinder, also several circle grooves are set at its surface uniform, easy to use, the length that simultaneously pen core stretches out the rubber pen cap can be regulated by the adjusting knob rotated on end face thereafter, by rotating adjusting knob driven rotary dish and bolt rotary, and drive pen core along cavity precession by screw rod through the head that connects of pen core, thus change the length that pen core stretches out the rubber pen cap, decrease chalk to fracture situation, avoid waste, and pen core centrally axis be divided into the different left half of core body of color and right half of core body, facilitate teachers ' teaching to use.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings;

Fig. 1 is the sectional front view of the utility model chalk;

Fig. 2 is the front view of the utility model chalk;

Fig. 3 is the sectional front view of the utility model rubber pen cap.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.

As Figure 1-3, the utility model relates to a kind of adjustable length Two color chalk, comprise the rubber pen cap 1 and pen core 2, a chamber 11 of installing pen core 2 is set in the described rubber pen cap 1, and the end of the rubber pen cap 1 arranges adjusting knob 4, described adjusting knob 4 is connected with rotating disc 5 center be arranged in the rubber pen cap 1, described rotating disc 5 arranges screw rod 6 by both sides of the edge Symmetrical vertical, described pen core 2 is arranged in the chamber 11 between two symmetrical screws 6, and the front end of pen core 2 is stretched out on front side of a chamber 11 of the rubber pen cap 1, the described rubber pen cap 1 is up-small and down-big cylinder, and the surface uniform of the rubber pen cap 1 arranges several circle grooves 3, described chamber 11 is by front cavity 12, middle cavity 13, rear chamber 14 is communicated with composition, described front cavity 12 size and pen core 2 size dimension match, described rotating disc 5 is arranged in rear chamber 14, described screw rod 6 is arranged on middle cavity 13 both sides, the rearward end of described pen core 2 is for connecting head 7, and connect the skewed slot 8 that head 7 is arranged and screw rod 6 thread groove connects, and pen core 2 centrally axis be divided into left half of core body 9 and right half of core body 10, described left half of core body 9 is different with the color of right half of core body 10.

In sum, chalk of the present utility model adopts the rubber pen cap 1 and is sleeved on pen core 2 two parts composition in the pen cap, avoid and contact with the direct of pen core 2, decrease dust pollution, and the rubber pen cap 1 is up-small and down-big cylinder, also several circle grooves 3 are set at its surface uniform, easy to use, the length that simultaneously pen core 2 stretches out the rubber pen cap 1 can be regulated by the adjusting knob 4 rotated on end face thereafter, rotated by rotation adjusting knob 4 driven rotary dish 5 and screw rod 6, and drive pen core 2 along cavity precession by screw rod 6 through the head 7 that connects of pen core 2, thus change the length that pen core 2 stretches out the rubber pen cap 1, decrease chalk to fracture situation, avoid waste, and pen core 2 centrally axis be divided into the different left half of core body 9 of color and right half of core body 10, facilitate teachers ' teaching to use.

The standardized element that the utility model uses all can be commercially, shaped piece all can carry out customized according to description with the record of accompanying drawing, the concrete connected mode of each part all adopts the conventional means such as bolt, rivet, welding ripe in prior art, machinery, part and equipment all adopt in prior art, conventional model, add that circuit connects and adopt connected mode conventional in prior art, be not described in detail in this.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims

1. an adjustable length Two color chalk, comprise the rubber pen cap (1) and pen core (2), it is characterized in that, a chamber (11) of installing pen core (2) is set in the described rubber pen cap (1), and the end of the rubber pen cap (1) arranges adjusting knob (4), described adjusting knob (4) is connected with rotating disc (5) center be arranged in the rubber pen cap (1), described rotating disc (5) arranges screw rod (6) by both sides of the edge Symmetrical vertical, described pen core (2) is arranged in the chamber (11) between two symmetrical screws (6), and the front end of pen core (2) is stretched out from the front side, a chamber (11) of the rubber pen cap (1).

2. a kind of adjustable length Two color chalk according to claim 1, is characterized in that, the described rubber pen cap (1) is up-small and down-big cylinder, and the surface uniform of the rubber pen cap (1) arranges several circle grooves (3).

3. a kind of adjustable length Two color chalk according to claim 1, it is characterized in that, described chamber (11) is communicated with is formed by front cavity (12), middle cavity (13), rear chamber (14), described front cavity (12) size and pen core (2) size dimension match, described rotating disc (5) is arranged in rear chamber (14), and described screw rod (6) is arranged on middle cavity (13) both sides.

4. a kind of adjustable length Two color chalk according to claim 1, it is characterized in that, the rearward end of described pen core (2) is for connecting head (7), and connect the skewed slot (8) that head (7) is arranged and screw rod (6) thread groove connects, and pen core (2) centrally axis be divided into left half of core body (9) and right half of core body (10), described left half of core body (9) is different with the color of right half of core body (10).