CN203171512U

CN203171512U - Cross screwdriver bit

Info

Publication number: CN203171512U
Application number: CN 201320090783
Authority: CN
Inventors: 徐震
Original assignee: SHANGHAI TIANDAO TOOL CO Ltd
Current assignee: SHANGHAI TIANDAO TOOL CO Ltd
Priority date: 2013-02-28
Filing date: 2013-02-28
Publication date: 2013-09-04
Anticipated expiration: 2023-02-28

Abstract

The utility model provides a cross screwdriver bit which comprises four screwing working faces. At least one screwing working face is a plane. The cross screwdriver bit can transmit large torque so as to enable work to be labor-saving. The bit can not skid or come off a screw easily so as to be good in safety performance. The screw can not be installed in an inclined mode. Moreover, the cross screwdriver bit is firm in connection and attractive.

Description

The Philip's head screw cutter head

Technical field

The utility model relates to a kind of driver bit, particularly a kind of Philip's head screw cutter head.

Background technology

Along with rise and the development of electric tool, increasing handwork instrument is substituted by electric tool gradually, and electric screw driver is exactly representative wherein, because of its efficient, labour-saving advantage, is used widely in all trades and professions.

But as the nose shape of the Philip's head screw cutter head of electronic Phillips screwdriver part, still continue to use the nose shape of the manual screwdriver of former cross at present, as shown in Figure 1, 2.The head of Philip's head screw cutter head 1 generally screws working face 2 and four by four and unscrews working face 3 and form, and all of the manual driver bit of former cross screw working face 2 and unscrew working face 3 all is arc surfaces.Though this shape shows slightly convenient in making, but cooperate with screw 4 cross recesseds and to exist bigger gap A, can't transfer larger torque thereby cause, and use under the occasion faster at the electric screw driver rotating speed, also because the existence of gap A, the installation of screw 4 is easy to generate inclination, causes bad connection and influence attractive in appearance; Cutter head also easily comes off out, and break cross recess owing to skidding from the cross recess of screw 4, influences safety.

The utility model content

The technical problems to be solved in the utility model be for the Philip's head screw cutter head that overcomes prior art can't transfer larger torque, cutter head comes off from screw easily, skids, the installation of screw is easy to generate defectives such as inclination, and a kind of Philip's head screw cutter head is provided.

The utility model is to solve above-mentioned technical problem by following technical proposals:

A kind of Philip's head screw cutter head, it comprises that four screw working face, its characteristics are that at least one described working face that screws is the plane.

Preferably, relative two to screw working face be the plane.

Preferably, four screw working face and are the plane.Can make like this screw on the working face stressed evenly, finish the work that screws to screw better.

Preferably, this plane is vertical with the described direction of rotation that screws the working face place.

Positive progressive effect of the present utility model is: but the Philip's head screw cutter head transfer larger torque that the utility model provides makes work laborsaving; Cutter head and screw difficult drop-off, skid, security is good; The installation of screw does not have inclination, is connected firmly, and is attractive in appearance.

Description of drawings

Fig. 1 is the floor map of existing Philip's head screw cutter head.

Fig. 2 is the local enlarged diagram of X part among Fig. 1.

Fig. 3 is the floor map of the Philip's head screw cutter head of the utility model preferred embodiment.

Fig. 4 is the local enlarged diagram of Y part among Fig. 3.

The specific embodiment

Lift a preferred embodiment below, and come the clearer the utility model that intactly illustrates by reference to the accompanying drawings.

Shown in Fig. 3,4, four of the Philip's head screw cutter head 5 in the present embodiment screw working face 6 and are the plane.Certainly, those skilled in the art are to be understood that, Philip's head screw cutter head 5 of the present utility model need not to be confined to four and screws working face 6 and be the plane, four screw and also can have only relative two to screw working face 6 and be the plane in the working face 6, perhaps even have only one to screw working face 6 and be the plane, these all are fine.

Screw working face 6 and be the plane, and this plane is vertical with the direction of rotation that screws working face 6 places, makes its cross recess with screw 8 contact to be plane contact, also just can transmit bigger moment, reaches the labour-saving effect.

In addition, screw working face 6 and be the plane, Philip's head screw cutter head 5 more is deep in the cross recess of screw 8, the gap B that unscrews between working face 7 and the cross recess significantly reduces, screwing working face 6 joins with the cross recess plane especially, eliminated the gap, thereby realized and the closely cooperating of groove, made Philip's head screw cutter head 5 when work, be difficult for generations with screw 8 and come off, skid and tilt.

This shows that the utility model has solved the deficiency of original Philip's head screw cutter head, have brute force, efficient, safe characteristic.

Though more than described the specific embodiment of the present utility model, it will be understood by those of skill in the art that this only illustrates, protection domain of the present utility model is limited by appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection domain of the present utility model.

Claims

1. Philip's head screw cutter head, it comprises that four screw working face, it is characterized in that, at least one described working face that screws is the plane.

2. Philip's head screw cutter head as claimed in claim 1 is characterized in that, two relative described working faces that screw are the plane.

3. Philip's head screw cutter head as claimed in claim 1 is characterized in that, four described working faces that screw are the plane.

4. as any described Philip's head screw cutter head among the claim 1-3, it is characterized in that this plane is vertical with the described direction of rotation that screws the working face place.