CN2357920Y - Device for preventing chalk from breaking - Google Patents

Abstract

The utility model relates to a device for preventing chalk from breaking. The utility model belongs to the technical field of the group of holders of pencils or chalk; pencil connectors; holders of crayons or chalk in protective devices for tip ends of pencil cores of the subclass of apparatuses for writing or drawing of the class of apparatuses for writing or drawing; office articles under the subsection of printing in the section of performing operations and transporting according to the International Patent Classification (IPC). The number of the utility model is B43K23/016. The utility model is composed of a forefinger sleeve, a medius sleeve, a thumb sleeve and a loose collar. The utility model is characterized in that the utility model can lead the supporting force of chalk to be homogeneous, can prevent chalk from breaking, and can reduce the waste. The device for preventing chalk from breaking of the utility model has high practicability.

Description

Prevent the chalk fracturer

The utility model relates to and prevents the chalk fracturer.(IPC) belongs to operation Department of Transportation by International Patent Classification (IPC), and printing branch is write or drawing appliance, and the big class of office appliance is write or the drawing appliance group, pencil or chalk clamper; The pencil connector; The clamper technical group field of wax crayon in the protector of reservoir tip or chalk.Be numbered B43K 23/016.

At present, existing and once had about pencil or chalk clamper; The pencil connector; The technology of the wax crayon in the protector of reservoir tip or the clamper of chalk is taught to the teacher and is prevented that the demand that chalk fractures from all doing very fruitful effort, also once designs many outstanding technical schemes.As declaring of the nineteen ninety-five Decree of Patent Office of China by Tang Peiying, Granted publication number is CN2207938Y, China Patent No. for (ZL) is: No. 94247811.8 utility model title is the utility model patent of " screw type Propelling chalk ", the technical scheme that is adopted.At pencil or chalk clamper; The pencil connector; The clamper technical elements of wax crayon in the protector of reservoir tip or chalk is a routine of great value invention, and it has solved teacher's automatic control problem to chalk length when using chalk effectively.But still have some deficits, it also is difficult to solve the problem that chalk fractures and cuts the waste that prevents.

The purpose of this utility model is to provide a kind of chalk fracturer that prevents.Prevent the problem that chalk fractures and cuts the waste with solution.

The purpose of this utility model is achieved in that this utility model prevents the chalk fracturer.Mainly constitute by forefinger cover, middle fingerstall, thumbstall, loose collar.Its major part loose collar is by selecting for use on the market.Forefinger cover, middle fingerstall, thumbstall use hard plastics through the injection moulding processing and manufacturing.At first, process through injection moulding with rigid plastics, process forefinger cover, middle fingerstall and thumbstall, and three's bottom is to be the fixedly connected of one altogether, this structure can make chalk stressed evenly, avoid owing to unbalance stress fractures, put at three then three loose collars are installed respectively, convenient when the teacher is used.So just realized the purpose of this utility model.

The utility model and original pencil or chalk clamper; The pencil connector; The technology of the wax crayon in the protector of reservoir tip or the clamper of chalk has been compared an advantage and improvement;

The first, because the utility model has designed forefinger cover, middle fingerstall, thumbstall in technical scheme, the circular configuration that the three constitutes can make chalk stressed evenly, avoids fractureing.Thereby just can more effectively solve the problem that prevents that chalk from fractureing and cutting the waste.

Accompanying drawing provides structural representation of the present utility model:

Fig. 1: be the structural representation of facing that the utility model prevents the chalk fracturer:

Fig. 2: be the plan structure schematic diagram that the utility model prevents the chalk fracturer:

The numbering of parts explanation in the schematic diagram: fingerstall (3) thumbstall (4) loose collar in (1) forefinger cover (2)

Below in conjunction with accompanying drawing, the utility model is described further:

As shown in the figure, the utility model prevents the chalk fracturer.Mainly constitute by forefinger cover (1), middle fingerstall (2), thumbstall (3), loose collar (4).Its major part loose collar (4) is by selecting for use on the market.Forefinger cover (1), middle fingerstall (2), thumbstall (3) use hard plastics through the injection moulding processing and manufacturing.At first, process through injection moulding with rigid plastics, process forefinger cover (1), middle fingerstall (2) and thumbstall (3), and three's bottom is to be the fixedly connected of one altogether, this structure can make chalk stressed evenly, avoid owing to unbalance stress fractures, put at three then three loose collars (4) are installed respectively, convenient when the teacher is used.So just realized the purpose of this utility model.Thereby just can solve the problem that prevents that chalk from fractureing and cutting the waste.

Below by embodiment, the utility model is done more detailed description:

Embodiment 1, in use, chalk inserted in the circular configuration of three cover compositions, then degree of tightness band (4) also is enclosed within on three fingers, can write,

Embodiment 2, finish using, and chalk taken out get final product.Thereby just can realize the purpose of this utility model.

Realize that preferred plan of the present utility model is is material with the rigid plastics, utilize the basic equipment of plastic processing factory, take to assemble in batch to produce by batch.Demand with supply education so just can realize practical value of the present utility model and economic worth better.

Claims (1)

1. one kind prevents the chalk fracturer, and it is to be made of forefinger cover (1), middle fingerstall (2), thumbstall (3), loose collar (4), and the bottom that it is characterized in that forefinger cover (1), middle fingerstall (2), thumbstall (3) three is that it is the fixedly connected of one.

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