CN104175265A

CN104175265A - Screwdriver

Info

Publication number: CN104175265A
Application number: CN201410413030.5A
Authority: CN
Inventors: 李军
Original assignee: ZHANGJIAGANG CITY TIANHUA HARDWARE TOOLS Co Ltd
Current assignee: ZHANGJIAGANG CITY TIANHUA HARDWARE TOOLS Co Ltd
Priority date: 2014-08-20
Filing date: 2014-08-20
Publication date: 2014-12-03

Abstract

The invention discloses a screwdriver and belongs to hardware tools. The screwdriver comprises a grab handle and a tool bar, one end of the tool bar is inserted into the grab handle, the tool bar is coaxial with the grab handle, and one end, located outside the grab handle, of the tool bar is provided with a tool bit. The screwdriver is characterized in that a thread is arranged on the outer wall of the tool bar located in the grab handle, the lead angle of the thread is not less than 45 degrees, a threaded hole matched with the thread is formed in the grab handle, and the tool bar can be screwed in and screwed out relative to the grab handle. By the screwdriver, the tool bar is enabled to rotate relative to the grab handle by the aid of pressure, the tool bit is driven to rotate through the tool bar, and a screw is screwed out rapidly.

Description

Screwdriver

Technical field

The present invention relates to hardware & tools, particularly screwdriver.

Background technology

One of hardware & tools that screwdriver is well known, its Main Function is for tightening screw or exiting screw, when using screwdriver to tighten screw, need to impose revolving force radially and axial pressure to screwdriver, when using screwdriver to exit screw, although more laborsaving than tightening screw, in order to prevent that the cutter head of screwdriver from departing from the groove on screw, still need screwdriver to impose axial pressure, then coordinate revolving force radially to exit screw; In addition, because people's wrist cannot continue rotation by 360 degree, generally turn over 180 degree, just need to make a short pause, and then be rotated 180 degree, like this with the hand half-turn bit rotary screwdriver of partly enclosing the land, make screw tighten at leisure or exit, more time-consuming, and after working long hours, wrist portion is easily tired.

Summary of the invention

Technical problem to be solved by this invention is: a kind of screwdriver that can exit fast screw is provided.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: screwdriver, comprise the knife bar in lever and one end insertion lever, described knife bar is coaxial with lever, that end end that knife bar is positioned at outside lever is provided with cutter head, on described knife bar in lever, is provided with guide thread, and the lift angle of described screw thread is not less than 45 degree, in described lever, be provided with the screwed hole coordinating with guide thread, described knife bar can be with respect to lever precession and back-out.

In described lever, be provided with a through hole coaxial with lever, through hole middle part is provided with the internal projecting ring affixed with lever, is provided with the screwed hole coordinating with guide thread on internal projecting ring.

That end end that described knife bar is positioned at lever is connected with a polygon fixture block, described fixture block can be followed the knife bar stretching motion that rotates in through hole, described lever is also provided with an end cap away from one end of cutter head, end cap is met on the face of through hole and is provided with the draw-in groove matching with fixture block, and the axial length of the guide thread on described knife bar is less than the axial spacing between internal projecting ring and end cap.

Described lever is provided with a transparent cover of passing for knife bar near one end of cutter head, and described transparent cover is threaded with lever.

The surrounding that is positioned at knife bar in described transparent cover has been evenly arranged a plurality of slots, and described cutter head can be assigned in slot.

Described knife bar has magnetic, and knife bar is positioned on one end end face of cutter head and is provided with a regular hexagon blind hole, is provided with the inserted block coordinating with blind hole on described cutter head.

The invention has the beneficial effects as follows: after unscrewing screw, utilize pressure that knife bar is rotated with respect to lever, the rotation of knife bar band dynamic cutter head, screws out screw fast.

Accompanying drawing explanation

Fig. 1 is the specific embodiment of the present invention structural representation;

In accompanying drawing: 1, lever, 2, knife bar, 3, cutter head, 4, guide thread, 5, screwed hole, 6, through hole, 7, internal projecting ring, 8, fixture block, 9, end cap, 10, draw-in groove, 11, transparent cover, 12, slot, 13, blind hole, 14, inserted block.

The specific embodiment

Below in conjunction with accompanying drawing, describe specific embodiment of the invention scheme in detail.

Screwdriver as shown in Figure 1, comprise the knife bar 2 in lever 1 and one end insertion lever 1, described knife bar 2 is coaxial with lever 1, that end end that knife bar 2 is positioned at outside lever 1 is provided with cutter head 3, on described knife bar 2 in lever 1, be provided with guide thread 4, the lift angle of described guide thread 4 is not less than 45 degree, is provided with the screwed hole 5 coordinating with guide thread 4 in described lever 1, and described knife bar 2 can be with respect to lever 1 precession and back-out.

In use, cutter head 3 snaps in the notch on screw to above-mentioned screwdriver, and lever 1 is applied to axial compressive force, by the cooperation of screwed hole 5 and guide thread 4, makes knife bar 2 rotations, drives screw rotation, realizes and exits fast screw or tighten screw.In real work, the screwdriver of left hand thread can be used for tightening right-handed screw and exits left-handed screw, and the screwdriver of right-handed thread can be used for tightening left-handed screw and exits right-handed screw.

In described lever 1, be provided with a through hole 6 coaxial with lever 1, through hole 6 middle parts are provided with the internal projecting ring 7 affixed with lever 1, are provided with the screwed hole 5 coordinating with guide thread 4 on internal projecting ring 7.

The end, one end that described knife bar 2 is positioned at lever 1 is connected with a polygon fixture block 8, described fixture block 8 can be followed knife bar 2 stretching motion that rotates in through hole 6, described lever 1 is also provided with an end cap 9 away from one end of cutter head 3, end cap 9 is met on the face of through hole 6 and is provided with the draw-in groove 10 matching with fixture block 8, and the axial length of the guide thread 4 on described knife bar 2 is less than the axial spacing between internal projecting ring 7 and end cap 9.When knife bar 2 proceeds to guide thread 4 disengaging internal projecting ring 7 to lever 1 inward turning, the knife bar 2 in screwed hole 5 is light section, now fixture block 8 and end cap 9 can be offseted, then swivel knife carrier 2, until fixture block 8 finally snaps in draw-in groove 10, like this, knife bar 2 just can not rotate with respect to lever 1.

Because a screwdriver has been fixed a kind of thread rotary orientation, that therefore can only fix tightens a kind of screw or exits a kind of screw, such as, the screwdriver of a right-handed thread, can only relatively rotating Quick fastening left-handed screw and exiting right-handed screw by guide thread 4 and screwed hole 5, if tighten right-handed screw and exit left-handed screw, just can only change the screwdriver of a left hand thread, and increased the screwdriver of polygon fixture block 8, in use, knife bar 2 is retracted to fixture block 8 to be snapped in after draw-in groove 10, knife bar 2 cannot rotate with respect to lever 1 again, at this time, the operation that can the screw of any rotation direction be tightened and be exited.

Described lever 1 is provided with a transparent cover 11 of passing for knife bar 2 near one end of cutter head 3, and described transparent cover 11 is threaded with lever 1.

The surrounding that is positioned at knife bar 2 in described transparent cover 11 has been evenly arranged a plurality of slots 12, and described cutter head 3 can be assigned in slot 12.

The screwdriver that is provided with transparent cover 11 is easy to install and maintain, and utilizes transparent cover 11, and slot 12 is set in transparent cover 11, has also facilitated carrying of cutter head 3.

Described knife bar 2 has magnetic, and knife bar 2 is positioned on one end end face of cutter head 3 and is provided with a regular hexagon blind hole 13, is provided with the inserted block 14 coordinating with blind hole 13 on described cutter head 3.Be with magnetic knife bar 2 cutter head 3 better can be adsorbed in blind hole 13.Magnetic is transmitted to screw by cutter head 3 simultaneously, screw can be adsorbed on cutter head 3, has facilitated operation.

Figure 1 shows that the screwdriver of a right-handed thread, be used for tightening left-handed screw and exit right-handed screw, as example, the course of work of labor screwdriver of the present invention: first the knife bar of screwdriver 2 is screwed out to fixture block 8 and offset with internal projecting ring 7 that (this process is when the cutter head 3 of screwdriver is downward, knife bar 2 can screw out lever 1 automatically), then the cutter head of screwdriver 3 is inserted in the groove of screw, hold on the other hand lever 1, screwdriver is applied to axial pressure, knife bar 2 utilizes the lift angle of guide thread 4 that pressure is changed into along the revolving force of guide thread 4 directions and the pressure of vertically-guided screw thread 4 directions, revolving force overcomes the frictional force that guide thread 4 is subject to and makes guide thread 4 with respect to screwed hole 5 rotations, be presented as that knife bar 2 is with respect to lever 1 rotation, because guide thread 4 rotation directions are dextrorotation, therefore knife bar 2 screws in left in lever 1, because lever 1 is held tightly, cannot rotate, can only rotate by knife bar 2, the revolving force of knife bar 2 overcomes after the frictional force that the screw thread of screw receives, can drive screw to anticlockwise, just can tighten left-handed screw and exit right-handed screw, when running into right-handed screw, need to tighten, but the screwdriver that there is no again left-handed guide thread 4 at hand, at this moment as long as by knife bar 2 retraction levers 1, fixture block 8 is snapped in draw-in groove 10, knife bar 2 just cannot rotate relative to lever 1, at this moment just can operate the screw of any rotation direction.

Claims

1. screwdriver, comprise the knife bar (2) in lever (1) and one end insertion lever (1), described knife bar (2) is coaxial with lever (1), knife bar (2) is positioned at that outer end end of lever (1) and is provided with cutter head (3), it is characterized in that, on described knife bar (2) in lever (1), be provided with guide thread (4), the lift angle of described guide thread (4) is not less than 45 degree, in described lever (1), be provided with the screwed hole (5) coordinating with guide thread (4), described knife bar (2) can be with respect to lever (1) precession and back-out.

2. screwdriver according to claim 1, it is characterized in that, in described lever (1), be provided with a through hole (6) coaxial with lever (1), through hole (6) middle part is provided with the internal projecting ring (7) affixed with lever (1), is provided with the screwed hole (5) coordinating with guide thread (4) on internal projecting ring (7).

3. screwdriver according to claim 2, it is characterized in that, that end end that described knife bar (2) is positioned at lever (1) is connected with a polygon fixture block (8), described fixture block (8) can be followed knife bar (2) stretching motion that rotates in through hole (6), described lever (1) is also provided with an end cap (9) away from one end of cutter head (3), end cap (9) is met on the face of through hole (6) and is provided with the draw-in groove (10) matching with fixture block (8), the axial length of the guide thread (4) on described knife bar (2) is less than the axial spacing between internal projecting ring (7) and end cap (9).

4. screwdriver according to claim 3, it is characterized in that, described lever (1) is provided with a transparent cover (11) of passing for knife bar (2) near one end of cutter head (3), and described transparent cover (11) is threaded with lever (1).

5. screwdriver according to claim 4, is characterized in that, the surrounding that is positioned at knife bar (2) in described transparent cover (11) has been evenly arranged a plurality of slots (12), and described cutter head (3) can be assigned in slot (12).

6. according to the screwdriver one of claim 1～5 Suo Shu, it is characterized in that, described knife bar (2) has magnetic, knife bar (2) is positioned on one end end face of cutter head (3) and is provided with a regular hexagon blind hole (13), is provided with the inserted block (14) coordinating with blind hole (5) on described cutter head (3).