CN2171453Y - Sawtooth screwdriver - Google Patents

Abstract

The utility model relates to a novel screwdriver which is improved on the basis of a beeline-shaped screwdriver. The utility model is characterized in that a screwdriver head is changed to form a sawtooth shape, thus, when people tighten the screws, a screwdriver edge can not slide out easily from a top groove of a screw cap, and the abrasion of the screwdriver head does not directly influence tightening effect. The utility model with easy use simultaneously has the advantages of both the beeline-shaped screwdriver and a cross-shaped screwdriver and overcomes the shortages of the beeline-shaped screwdriver and the cross-shaped screwdriver.

Description

Sawtooth screwdriver

The utility model relates to a kind of screwdriver of edge of a knife indention, belongs to the hand tools class, classification number B25B.

In production practices and social life, screwdriver is the instrument that people often will use.The screwdriver of domestic extensive employing at present has two kinds, and a kind of edge of a knife is " ten " font, and another kind is " one " font.The advantage of " ten " font screwdriver is to use conveniently, be difficult for landing from the nut inverted draw cut, its shortcoming is that narrow (" ten " font screwdriver only is suitable for tightening the screw that head is " a ten " font to range of application, then be not suitable for for " one " font screw), wearing and tearing are very fast, the wearing and tearing of four inclines of the edge of a knife will directly influence its screwing force with cutter head and be delivered on the nut, cause to be difficult for making power, and the problem that screw tightening is difficult is arranged; The advantage of " one " font screwdriver is that wide (it not only can be used for tightening on the market and to use more " one " font screw range of application, also can be suitable for " ten " font screw), easily make power, easy tighten the screws, it is little to wear and tear, not fragile, but because its cutter head is flat, smooth, very easily slippage from the nut inverted draw cut, both lost time, injured operating personnel again easily.

The purpose of this utility model is to provide a kind of applied range, and the edge of a knife is difficult for skidding off from the nut inverted draw cut, and the wearing and tearing of cutter head directly do not influence it and tighten effect, novel screwdriver easy to use.

The purpose of this utility model is achieved in that the edge of a knife adopts " one " font, and with it by smoothly changing zigzag into, when people exert oneself tighten the screws, the pressure that acts on cutter head increases zigzag cutter head and the friction of nut inverted draw cut, cutter head remained in the nut inverted draw cut do not skid off, the wearing and tearing of cutter head simultaneously do not influence the effect that it is tightened.

The utility model is compared with prior art, has the following advantages: because edge of a knife indention of the present utility model can make cutter head combine more closely with the surface of nut inverted draw cut, make its edge of a knife be difficult for skidding off from the nut inverted draw cut; Because its edge of a knife is " one " font, does not exert all one's strength and tighten the screws so the wearing and tearing of the edge of a knife do not influence it, and the advantage of applied range is arranged.

Below in conjunction with accompanying drawing the utility model is further set forth.

Figure one is the schematic diagram of this zigzag screwdriver.

This zigzag screwdriver is by handle of a knife (1), blade (2), and cutter head (3) is formed.Blade (2) is integral with cutter head (3), and handle of a knife (1) is bound up on blade (2) top.When people exerted oneself tighten the screws, the pressure that acts on cutter head was combined closely zigzag cutter head (3) and nut inverted draw cut, cutter head (3) is remained in the nut inverted draw cut do not skid off.

Claims (1)

1, a kind of cutter head is the screwdriver of " one " font, and by handle of a knife (1), blade (2) and cutter head (3) are formed, and it is characterized in that the blade of cutter head (3) is a zigzag.

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