CN201824297U

CN201824297U - Telescopic screwdriver

Info

Publication number: CN201824297U
Application number: CN201020574674XU
Authority: CN
Inventors: 向为; 袁思思; 胡天培; 顾时荣
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2010-10-25
Filing date: 2010-10-25
Publication date: 2011-05-11
Anticipated expiration: 2020-10-25

Abstract

The utility model relates to a hardware tool, in particular to a screwdriver. A telescopic screwdriver comprises a handle, a tool bar and a tool bit and is characterized in that a cavity is arranged in the handle, the handle is sheathed and assembled on the outer side of the tool bar, the handle is in clearance fit with the tool bar, a lock sleeve for locking the tool bar is arranged at the front end of the handle, which is connected with the tool bar, the front end of the inner wall of a circular hole of the lock sleeve has taper degree, an internal thread is arranged at the rear end of the inner wall of the circular hole of the lock sleeve, the front end of the handle has the taper degree matched with the inner wall of the lock sleeve, an axial aperture is arranged at the front end of the handle, and the lock sleeve is in threaded connection with the handle. The telescopic screwdriver has the characteristics of convenience in carrying, convenience in storage and the like.

Description

Scalable screwdriver

Technical field

The utility model relates to a kind of hardware ﹠ tools, especially relates to a kind of screwdriver.

Background technology

An existing class screw driver handle, knife bar and cutter head are fixed; Also having a class is the screwdriver of interchangeable bit, fixedlys connected but remain between knife bar and the handle.Volume very much not is convenient for carrying and deposits.

As notification number be: a kind of replaceable head screwdriver of 200977634, comprise shank, knife bar and cutter head, knife bar and shank are fastenedly connected, and it is characterized in that cutter head and knife bar become two bodies, and both are movable to cooperate and the buckle connection.Though the cutter head of this patent can be changed, knife bar is fixedlyed connected with shank, and volume very much not is convenient for carrying and deposits.

Summary of the invention

The utility model mainly is to be inconvenient to carry and problem such as to deposit at existing screwdriver volume is excessive, and a kind of scalable screwdriver easy to carry and store is provided.

The purpose of this utility model mainly is achieved by following proposal: a kind of scalable screwdriver, comprise handle, knife bar and cutter head, described handle inside is provided with cavity, taper knob fits over the knife bar outside, described handle and knife bar matched in clearance, the front end that described handle is connected with knife bar is provided with the lock tube that is used to lock knife bar, the circular-hole internal-wall front end of described lock tube has tapering, the circular-hole internal-wall rear end of lock tube is provided with internal thread, described handle front end is provided with the tapering that matches with the lock tube inwall, described handle front end is provided with axial slits, and described lock tube is threaded with handle.Handle inside is provided with cavity, taper knob fit over the knife bar outside and with the knife bar matched in clearance, knife bar can be elastic in handle.When screwdriver does not need to use, knife bar is contracted in handle inside, be convenient for carrying and deposit.When screwdriver need use, knife bar can be pulled out from handle, handle front end and lock tube inwall all have certain taper, the handle front end also is provided with axial slits, when handle is threaded with lock tube, the axial slits of handle front end is subjected to the constraint of lock tube inwall tapering and shrinks the clamping knife bar, and knife bar can not become flexible when guaranteeing to use.

As preferably, described knife bar is hexa-prism, and the knife bar front end face is provided with the hexagon blind hole, and the blind hole bottom is provided with magnet, and described cutter head bottom is provided with six prismatic bases with the blind hole matched in clearance.Knife bar is hexa-prism, when lock tube locking knife bar uses screwdriver, can not cause knife bar to skid because moment of torsion is excessive.The base matched in clearance of blind hole that the knife bar front end face is hexagonal and cutter head bottom six prisms, the magnet absorption cutter head bottom blind hole prevents that cutter head from dropping, and makes cutter head detachable.The free degree of cutter head when the shape of six prisms has limited the screwdriver rotation guarantees that cutter head was using the center can not skid.Cutter head can be arranged to different models such as " one " font, " ten " font, the base shape invariance of cutter head bottom, and the cutter head of multiple different size can be changed use.

As preferably, described handle end edge surrounding cavity is provided with some axial blind holes that are used to deposit cutter head, and described handle end is provided with end cap, and described end cap is threaded with handle.The handle end surrounding cavity is provided with some blind holes, and the cutter head of different size can be placed in the blind hole around knife bar, and whole screwdriver is retracted to the handle size and is convenient for carrying.When screwdriver need use, can open the cutter head that end cap need to select use, make things convenient for the access of cutter head.

Therefore, the utlity model has and be convenient for carrying and characteristics such as be convenient to deposit.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the present utility model.

Accompanying drawing 2 is the utility model a kind of cutaway views under contraction state.

Illustrate: 1-handle, 2-knife bar, 3-lock tube, 4-axial slits, 5-base, 6-end cap, 7-cutter head.

The specific embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

As shown in Figure 1, 2, a kind of scalable screwdriver, comprise handle 1, knife bar 2 and cutter head 7, handle 1 inner hollow forms the cavity with spatial accommodation, handle 1 terminal edge surrounding cavity is provided with 6 blind holes that are used to deposit the different model cutter head, the end of handle 1 is provided with an end cap 6, and end cap is threaded with handle.Handle 1 cover fit over knife bar 2 outsides and with knife bar 2 matched in clearance, knife bar 2 can be flexible from the front end of handle 1.The front end place of handle 1 is provided with external screw thread, and the externally threaded nose circle side face of handle is provided with 3 axial slits 4.Handle 1 is provided with a lock tube 3 with the front end of knife bar 2 junctions.The front end of the circle hole shape inwall of lock tube 3 has tapering, and the rear end of the circle hole shape inwall of lock tube 3 is provided with the internal thread that matches with the handle external screw thread, and handle 1 front end also has the tapering that matches with the lock tube inwall.Axial slits 4 on the handle 1 is subjected to the constraint of the inwall tapering of lock tube 3, shrink to clamp telescopic knife bar 2, and knife bar 2 is arranged to hexa-prism, and the moment of torsion that clamped knife bar can be when not using is excessive and skid.The front end face of knife bar 2 is provided with a hexagon blind hole, and the cutter head end is provided with the base 5 of one six prism, base 5 and hexagon blind hole matched in clearance, and hexagon blind hole bottom can be provided with magnet absorption cutter head 7, is convenient for changing cutter head 7.The point of a knife of cutter head 7 front ends can be provided with multiple different model, such as " one " font, " ten " font etc., base 5 shapes of cutter head end and size are constant, not only can satisfy the different user demand of user, and identical base make things convenient for the replacing of different model cutter head.

When screwdriver does not need to use, knife bar 2 can be contracted in handle 1 inside, screw lock tube 3 knife bar 2 is limited in the handle 1, open handle 1 end cap 6, the cutter head 7 of different size is placed on blind hole in the handle 1 around knife bar 2 successively, seal end cap 6.Cutter head 7 is placed on the inner memory space of saving screwdriver of handle 1, and screwdriver is shrunk to handle 1 size, is convenient for carrying after the volume-diminished.When screwdriver need use, lock tube 3 is unscrewed, the knife bar 2 that is contracted in handle 1 inside is stretched, screw lock tube 3 after being pulled to suitable length, because lock tube 3 inwalls have tapering, thereby being subjected to constraint, the axial slits 4 of handle 1 shrinks knife bar 2 clampings, knife bar 2 is loosening when preventing the screwdriver use, and because knife bar 2 is hexa-prisms, the moment of torsion that clamped knife bar can be when not using is excessive and skid.Take out the cutter head of the specification that is fit to user's needs by end cap 6 from handle 1, cutter head is inserted in the hexagon blind hole of knife bar 2 front ends, the magnet bottom blind hole adsorbs cutter head, prevents that cutter head from dropping.In screwdriver when rotation,, the hexagon blind hole can limit the free degree with the cutter head of blind hole matched in clearance, prevents that cutter head from skidding, and is easy to use, simple to operate.

Should be understood that this embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Claims

1. scalable screwdriver, comprise handle, knife bar and cutter head, it is characterized in that, described handle (1) inside is provided with cavity, handle (1) cover fits over knife bar (2) outside, described handle (1) and knife bar (2) matched in clearance, the front end that described handle (1) is connected with knife bar (2) is provided with the lock tube (3) that is used to lock knife bar, the circular-hole internal-wall front end of described lock tube has tapering, the circular-hole internal-wall rear end of lock tube is provided with internal thread, described handle front end is provided with the tapering that matches with the lock tube inwall, and described handle front end is provided with axial slits (4), and described lock tube is threaded with handle.

2. scalable screwdriver according to claim 1, it is characterized in that described knife bar is hexa-prism, the knife bar front end face is provided with the hexagon blind hole, the blind hole bottom is provided with magnet, and described cutter head bottom is provided with six prismatic bases (5) with the blind hole matched in clearance.

3. scalable screwdriver according to claim 1 and 2 is characterized in that, described handle end edge surrounding cavity is provided with some axial blind holes that are used to deposit cutter head, and described handle end is provided with end cap (6), and described end cap is threaded with handle.