CN202623638U - Chalk - Google Patents

Abstract

The utility model discloses chalk which comprises a chalk body, a chalk sleeve and a bolt. A limiting groove is arranged in the radial direction of the chalk body. A protruding block matched with the limiting groove is arranged on the lower portion on the inner side of the opening end of the chalk sleeve. A threaded hole matched with the bolt is arranged on the top of the tail end of the chalk sleeve. The bolt is arranged in the threaded hole of the chalk sleeve, and the heat part of the bolt is arranged in the chalk sleeve. The chalk body is arranged in the chalk sleeve, and one end of the chalk body abuts against the head part of the bolt. Moreover, the protruding block is clamped in the limiting groove. The chalk is simple in structure and convenient to use, and the length of an exposed part of the chalk body can be adjusted conveniently. Breaking and falling of the chalk can be avoided. Meanwhile, hands are protected.

Description

A kind of chalk

Technical field

The utility model relates to a kind of chalk.

Background technology

At present, the chalk of use is bare, and hand directly contacts with chalk, the hand skin of making dirty easily, and when hand overexerts, break chalk easily, be inconvenient to use.

The utility model content

Goal of the invention: in order to overcome the deficiency that exists in the prior art, the utility model provides a kind of chalk that has chalk sleeve that can freely adjust chalk length.

Technical scheme: for solving the problems of the technologies described above, the technical scheme that the utility model adopts is:

A kind of chalk comprises chalk body, chalk sleeve and bolt, radially is provided with limited impression at the chalk body; Be provided with the projection suitable with limited impression in chalk running-on end lower inside, be provided with the screwed hole suitable with bolt at chalk sleeve tail end top, said bolt is installed in the screwed hole of chalk sleeve; And the head of bolt is arranged in the chalk sleeve; The chalk body places in the chalk sleeve, and the one of which end withstands the head of bolt, and projection is stuck in the limited impression.

During use, can increase the structure of limited impression and projection simultaneously, make chalk be difficult for rotating convenient the use in use through regulating the exposed length of position adjustments chalk body of bolt; When producing, the design chalk body with normal structure miscellaneous part, after the chalk body uses, also can continue to use miscellaneous part like this through the mode of replacement chalk body, avoid waste, reduce cost.

Beneficial effect: the chalk that the utility model provides, simple in structure, easy to use, can conveniently adjust the exposed length of chalk body, avoid chalk to break and fall, the adversary protects simultaneously.

Description of drawings

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

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done explanation further.

Be illustrated in figure 1 as a kind of chalk; Comprise chalk body 1, chalk sleeve 2 and bolt 3, chalk body 1 radially be provided with limited impression 4, be provided with the projection 5 suitable in 2 mouthfuls of ends of chalk sleeve lower inside with limited impression 4; Be provided with the screwed hole suitable with bolt 3 at chalk sleeve 2 tail end tops; Said bolt 3 is installed in the screwed hole of chalk sleeve 2, and the head of bolt 3 is arranged in the chalk sleeve 2, and chalk body 1 places in the chalk sleeve 2; The one of which end withstands the head of bolt 3, and projection 5 is stuck in the limited impression 4.

The above only is the preferred implementation of the utility model; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.

Claims (1)

1. chalk; It is characterized in that: this chalk comprises chalk body (1), chalk sleeve (2) and bolt (3), chalk body (1) radially be provided with limited impression (4), be provided with and the suitable projection (5) of limited impression (4) in chalk sleeve (a 2) mouthful end lower inside; Be provided with and the suitable screwed hole of bolt (3) at chalk sleeve (2) tail end top; Said bolt (3) is installed in the screwed hole of chalk sleeve (2), and the head of bolt (3) is arranged in the chalk sleeve (2), and chalk body (1) places in the chalk sleeve (2); The one of which end withstands the head of bolt (3), and projection (5) is stuck in the limited impression (4).

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