CN2066373U

CN2066373U - Screw and screw driver

Info

Publication number: CN2066373U
Application number: CN 89221560
Authority: CN
Inventors: 周寨红
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-20
Filing date: 1989-12-20
Publication date: 1990-11-28

Abstract

The utility model relates to a screw and a screw driver. The head of the screw is provided with an axial direction round hole or the wall of the hole is provided with a screw thread. The screw driver is provided with a shaft matched with the hole of the screw head, and the shaft is arranged in the hollow tool bar and controlled by a controller handle in the hollow shaft, which enable the open-close and up-down movement of the branch part of one end of the shaft. When the branch part is opened, the screw is held by the acting force engendered from the hole wall of the screw head, and the screw is released when the branch part is closed. The utility model has the advantages of big moment, firm and convenient hold of the screw, and the blade of the screw driver is uneasy to slide out of the groove while the screw driver is in use.

Description

Screw and screw driver

The utility model is about screw and screw-driver.

Existing screw with the screw-driver dismounting, its head construction has in-line, cross and three kinds of cross one word hybrid types (shown in accompanying

drawing

1,2,3).The supporting use of in-line screw and Flathead screwdriver has the big advantage of moment, but the blade of screw-driver easily skids off outside the groove in the disassembly process, and the supporting use of cross screw and Philips screwdriver has the not eely advantage of blade in the use.But moment is little.Hybrid type can be respectively and Philips screwdriver, the supporting use of Flathead screwdriver, but can not be in conjunction with the advantage of two kinds of screws and screw-driver.The plain edition Flathead screwdriver and the Philips screwdriver of no additional device, the screw of the privileged sites that inconvenient dismounting staff is difficult for touching, for this reason, people have increased additional device for the plain edition screw-driver; What have adds magnetic devices on knife bar, what have adds a resilient sleeve on knife bar, what have adds grapple on knife bar, what have makes blade into the jag structure, these above technology are not in the same place the in-line and the advantages of criss-cross screw and screw-driver, do not solve the dismounting problem of the screw of privileged sites well yet, the screw-driver that adds magnetic devices on the knife bar can produce electromagnetic pollution to parts, nor can be applicable to the screw that nonmagnetic substance is done; Add grapple on the knife bar, need bigger space on every side, chucking power is big inadequately; Blade makes the Flathead screwdriver that is only applicable to of jag structure into, and chucking power is big inadequately.

The purpose of this utility model is the advantages of existing in-line and criss-cross screw and screw-driver, and screw-driver can clamp screw easily securely when the dismounting screw, and to around spatial requirement identical with the medium-sized screw-driver that does not promptly have an additional device, and can with common in-line screw and Flathead screwdriver compatibility well.

The utility model is to realize like this.At screw head, an axial circular hole is arranged.One shaft is arranged on Flathead screwdriver, and when the dismounting screw, this shaft matches with axial bore on the screw, and the blade that prevents screw-driver moves slippage along the groove of screw head, perhaps can also be used for the clamping screw.

The utility model can be: the head of screw has the groove of in-line or the criss-cross groove of orthogonal one-tenth 90 degree, at its head one axial circular hole is arranged, or also has screw thread (shown in accompanying drawing 4.5) on the hole wall.

Shaft on the screw-driver is that one section one threaded metallic rod 6(of end sees accompanying drawing 6,7,8), and attacking a threaded end vertically in two.The knife bar 7 of screw-driver is hollow, and metallic rod 6 is contained in the knife bar 7, and an end of bifurcated is towards knife edge part.The pitch screw thread identical with the pitch of the screw thread of metallic rod 6 arranged on the hole wall of knife edge part.The elastic force of the forked section dependence of metallic rod 6 itself or the elastic force of another resilient member open at angle when retraining around not having.Metallic rod 6 is packed into behind the knife bar 7, and the forked section of metallic rod 6 can be to be sandwiched on the hole wall of blade, also can not be subjected to the clamping of hole wall and opens naturally.Open with clamping and realize by rotating metallic rod 6.Metallic rod 6 extends in the hollow handle of a knife 2 has the cylinder 3 of Joystick 4 to be connected with one.The control of metallic rod 6 controlled handles 4 and rotate or move up and down along knife bar 7.One spring 5 is arranged on the metallic rod 6, be contained in the handle of a knife 2, spring 5 one crowns are in the end of handle of a knife 2, and a crown is on the cylinder 3 that metallic rod 6 links to each other, and the elastic force that spring 5 produces makes metallic rod 6 that the trend of moving along on the knife bar 7 be arranged.The appearance of handle of a knife 2 has a ∪ shape groove, and handle 4 is exposed to handle of a knife 2 outsides through this groove, the restriction of the motion groove of handle 4.

Shaft on this screw-driver also can be one section threaded bar, and it can just be screwed in the circular hole of head of this screw, and what fuse with it is one section hollow tubular or several stocks parallel to each other.Hollow tubular or stock are enclosed within the outer surface of the knife bar of screw-driver.Have an axial groove on the blade of screw-driver, groove width is than the slightly larger in diameter of threaded bar, and during use, threaded bar is just in time on the groove of blade.Shown in accompanying drawing 9,10,11,12.

Device on this screw-driver can also be one section bar that fuses with blade, and it is not movable, only plays the slip of restriction blade along the groove on the screw in the use.

The bore dia of the axial bore of screw head of the present utility model is bigger than groove width, and optimum diameter is 2 times of groove width.Better effects if when the depth ratio groove depth in hole is bigger.Metallic rod 6 in the screw-driver is good with steel, and other materials also can.Cylinder 3 and Joystick 4 with insulating material for well.Other structural member is drawn materials with the normal screws cutter can be consistent.

It is big to the utlity model has moment, and blade is difficult for slippage during use, and can make things convenient for and clamp screw securely, the screw of dismounting privileged sites is with very convenient, can unload the screw of stripped thread easily, improve labour productivity, be the upgrading replacement product of screw.

Narrate an embodiment of the present utility model with regard to the screw-driver of this explanation accompanying drawing 6 structures.

Pulling handle 4 earlier opens the lower end of metallic rod 6, moving handle 4 makes the lower end of metallic rod 6 expose edge a bit, spanner handle 4 again, the forked section of metallic rod 6 is subjected to the clamping of blade hole wall and closure, be inserted in screw of the present invention, make the groove on the blade aligning screw, the axial bore that metallic rod 6 is aimed on the screws.Pull handle 4, the forked section of metallic rod 6 is not subjected to the clamping of blade hole wall and abuts against on the axial hole wall of screw head, and screw thread links closely between them, has produced very big mechanical force.Because the effect of spring 5 abuts against on the blade groove on the screw, be difficult for producing double swerve.At this moment, any position can be screw be loaded on handyly,, also bearing can be loaded on easily when having electric wire on the screw because chucking power is big.Dismounting makes the forked section of metallic rod 6 be sandwiched on the hole wall of blade earlier during screw, firmly unscrew screw after, make the forked section of metallic rod 5 not be subjected to the clamping of blade hole wall again, abut against on the axial hole wall of screw head, can easily screw be taken out.In said process, the divergent ends of metallic rod 5 from start to finish in the axial bore of screw, the restriction blade along the moving of the groove of screw head, make screw-driver in use be difficult for slippage.

This screw-driver makes the divergent ends of metallic rod 6 along knife bar 7 risings one segment distance it be clamped by blade before using common in-line screw by Joystick 4, can use the screw of common in-line easily.

Obviously, this screw can if the groove of screw head is criss-cross, then can also use common Philips screwdriver with common Flathead screwdriver dismounting.

Claims

1, a kind of screw with the screw-driver dismounting, its head has the groove that uses for screw-driver, and the invention is characterized in: screw head has an axial circular hole.

2, the screw-driver used of a kind of dismounting screw, its knife bar front end has the in-line blade of the groove that inserts screw head, the invention is characterized in: the knife edge part of screw-driver has a shaft, this shaft is in the axial bore of screw head the time, the restriction blade is along the slip of the groove on the screw, perhaps can also on the axial hole wall of screw head, produce mechanical force, to catch screw.

3,, it is characterized in that on the axial hole wall of head screw thread being arranged by the screw of claim 1.

4, by the screw-driver of claim 2, it is characterized in that described shaft and blade fuse.

5, by the screw-driver of claim 2, it is characterized in that described shaft separates with blade.

6, screw-driver by claim 5, it is characterized in that shaft 6 one ends have the screw thread with the threads engaged of the axial hole wall of the head of screw, and vertically in two, be contained in the hollow knife bar 7, screw thread with the threads engaged of the divergent ends of shaft 6 is arranged on the hole wall of the knife edge part of knife bar 7, shaft 6 the other ends link to each other with the cylinder 3 that Joystick 4 is housed, cylinder 3 is contained in the hollow handle of a knife 2, Joystick 4 is exposed to outside the handle of a knife 2 by the ∪ shape groove on the handle of a knife 2, Joystick 4 moves along the ∪ shape groove of handle of a knife 2, make shaft 6 do rotatablely moving and moving up and down of 90 degree along knife bar 7, therefore the forked section of one end is finished following action: rely on spring force to open when the restriction of the hole wall that is not subjected to blade, closure when being subjected to the restriction of hole wall of blade.