CN201711907U - Screwdriver - Google Patents

Abstract

The utility model discloses a screwdriver which belongs to the field of mounting tools of buildings and comprises a tool shank, a blade and a tool bit, wherein a connecting rod is fixedly arranged at the tail end of the tool shank, a reinforcing rod is hinged on the connecting rod, and a groove body which can accommodate the reinforcing rod is formed on the side wall of the tool shank. The using process of the screwdriver is as follows: when a screw can only be turned by greater external force, the reinforcing rod is pulled to be separated from the groove body, thereby leading the reinforcing rod and the connecting rod to be positioned on the same straight line, and leading the force to be applied on the screwdriver through the reinforcing rod to turn the rusted screw (equivalence to the lever principle); furthermore, the force application points on the reinforcing rod can be changed (that is the force application positions of the hand on the reinforcing rod can be moved) according to the required external force; when the greater external force need not to applied, the reinforcing rod can be arranged in the groove body, and the screwdriver can be directly turned through the tool shank. In addition, a fixed sleeve is arranged outside the tool bit, when in use, the fixed sleeve is sheathed outside the screw, thereby preventing the slippage of the tool bit and further preventing the tool bit from being separated from the screw during the turning.

Description

A kind of screwdriver

Technical field

The utility model belongs to the construction and installation instrument, is specifically related to a kind of screwdriver.

Background technology

At present, all need to use screwdriver in building trade and the various operation of being engaged in civil structure.In some occasion, need to use bigger power could become flexible or tighten the screws, need use the auxiliary application of force of spanner or pliers this moment, this just requires the operator to carry aids such as spanner or pliers, causes operation cumbersome.And for the screw of shapes such as cross, cutter head often skids easily when turning screwdriver, is difficult to the screw application of force.

The utility model content

The purpose of this utility model is at above-mentioned the deficiencies in the prior art, and a kind of screwdriver that can apply the external force that varies in size as required is provided.

The technical solution of the utility model realizes in the following manner:

A kind of screwdriver comprises handle of a knife, blade and cutter head, and the handle of a knife end is fixed with connecting rod, is hinged with bracing piece on the connecting rod, has the cell body that can hold bracing piece on the handle side walls.

Cutter head is provided with fixed cover outward, and fixed cover is fixed on the blade.

The utility model use is as follows: when the bigger external force of needs just can turn screw, pull bracing piece and break away from cell body, make bracing piece and connecting rod be on the same straight line, this time by bracing piece to the screwdriver application of force, be equivalent to lever principle, then can turn the dead screw of rust, and according to the size of required external force, change and get final product (force application location of promptly mobile hand on bracing piece) at the point of application on the bracing piece; When not needing to use bigger power, bracing piece is in the cell body, directly turns screwdriver and get final product by handle of a knife.In addition, cutter head is provided with fixed cover outward, during use fixed cover is enclosed within outside the screw cutter head disengaging screw that skids in the time of can preventing to turn.

Description of drawings

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

Fig. 2 is the cross sectional representation of blade among Fig. 1;

Fig. 3 is the structural representation of the utility model embodiment 2;

Fig. 4 is the partial schematic diagram of cutter head and fixed cover among Fig. 3.

The specific embodiment

Embodiment 1

As depicted in figs. 1 and 2, the utility model comprises handle of a knife 1, blade 2 and cutter head 3, and handle of a knife 1 end is fixed with connecting rod 5, is hinged with bracing piece 6 on the connecting rod 5, has the cell body 4 that can hold bracing piece 6 on handle of a knife 1 sidewall.

At conventional state, bracing piece 6 is in the cell body 4, thus carry easily, and when needing to use bracing piece 6, only need it is got final product from folding of cell body 4, very easy to use.

Embodiment 2

As shown in Figure 3 and Figure 4, be provided with fixed cover 7 outside the cutter head 3 of present embodiment, fixed cover 7 is fixed on the blade 2.Other structures are with embodiment 1.Fixed cover 7 is enclosed within the outside of screw, can prevent that driver bit 3 from skidding, and accelerates job scheduling.

Claims (2)

1. screwdriver, comprise handle of a knife (1), blade (2) and cutter head (3), it is characterized in that: handle of a knife (1) end is fixed with connecting rod (5), is hinged with bracing piece (6) on the connecting rod (5), has the cell body (4) that can hold bracing piece (6) on handle of a knife (1) sidewall.

2. screwdriver according to claim 1 is characterized in that: cutter head (3) is outer to be provided with fixed cover (7), and fixed cover (7) is fixed on the blade (2).

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