CN102357855A

CN102357855A - Screw driver

Info

Publication number: CN102357855A
Application number: CN2011103331426A
Authority: CN
Inventors: 郝斌魁
Original assignee: Guizhou Space Appliance Co Ltd
Current assignee: Guizhou Space Appliance Co Ltd
Priority date: 2011-10-28
Filing date: 2011-10-28
Publication date: 2012-02-22

Abstract

The invention relates to a screw driver, which comprises a handle and a cutter bar, wherein a flat bulge is formed at the rear end of the cutter bar and is fixedly connected with one end of the handle; a cutter head at the front end of the cutter bar is flat; and an anti-skidding protective device is arranged outside the cutter bar of the screw driver. The screw driver has a simple structure and generality, is convenient to use, can be used for assembling screws on the surface of a plate and screws positioned in deep holes, can effectively prevent the screws from being deflected and even dropping out, can effectively prevent the screws from sideslipping when the screws are screwed to improve the assembly efficiency, and can prevent products from being scratched to improve the appearance quality of the products.

Description

A kind of screwdriver

Technical field

The present invention relates to fastened tools, especially a kind of screwdriver with anti-skidding protection belongs to the assembly tool technical field.

Background technology

When assembling and dismounting product, all to use various fastened tools such as screwdriver to carry out fastening usually and dismounting to screw.Operating personnel are when twisting screw, and it is balanced to concentrate, exert oneself, and guarantees that screwdriver can not skid off from the screw upside, in order to avoid cause product to scratch, so efficiency of assembling is very low.This operation skill to operating personnel is had relatively high expectations, and in fact, screwdriver is difficult to control, often skids off, and when particularly screw does not screw in fixedly fully, can stay light or heavy cut unavoidably, forms serious appearance quality.

Summary of the invention

The objective of the invention is to the problems referred to above, a kind of fast demountable, the safe and reliable screwdriver with anti-skidding protection are provided.

Screwdriver of the present invention comprises handle, knife bar, and said knife bar rear end is provided with flat-ended protrusions, is connected with handle one end matching and fixing, and knife bar front end cutter head position is a flat, and this screwdriver knife bar is equipped with anti-skidding protective device outward.

Said anti-skidding protective device is made up of protection sleeve, spring, alignment pin; Said protection sleeve is a tubular structure, is provided with the center stepped hole, and the diameter of said centre bore and knife rod head corresponding end is greater than the knife rod head size; The diameter at centre bore middle part is corresponding with knife bar middle part external diameter; Centre bore rear end diameter of bore is corresponding with the spring external diameter, and the protection sleeve rear end is provided with the draw-in groove corresponding with the alignment pin axial dimension, and said knife bar rear end is provided with radial direction through hole; Alignment pin is fixed in this radial direction through hole, and spring housing is contained on the knife bar and places between protection sleeve centre bore step and the alignment pin.

Adopt the beneficial effect of technique scheme to be:

1, simple in structure, easy to use;

2, keep the erecting tools versatility, both can assemble the screw that exposes outside the surface, also can assemble the screw that is positioned at deep hole;

3, can effectively prevent screw crooked, even drop;

4, when twisting screw, can prevent effectively that screwdriver from breakking away, and improves efficiency of assembling;

5, can effectively prevent to scratch product, improve the product appearance quality.

Description of drawings

Fig. 1 is a screwdriver structure sketch map according to the invention.

Fig. 2 is a protection sleeve part drawing in the screwdriver according to the invention.

Fig. 3 is a protection sleeve sectional axonometric drawing shown in Figure 2.

Sketch map when Fig. 4 is to use screwdriver installing plate screwing of the present invention.

Sketch map when Fig. 5 is to use screwdriver installing hole inner bolt of the present invention.

Among the figure: 1-handle, 2-knife bar, 3-protection sleeve, 4-spring, 5-alignment pin, 6-screw, 7-installing plate.

The specific embodiment

Below in conjunction with accompanying drawing to the detailed description of the invention.

As shown in Figure 1, the screwdriver with anti-skidding protection according to the invention is by handle 1, knife bar 2, and protection sleeve 3, spring 4, alignment pin 5 is formed.Wherein handle 1, and knife bar 2 is formed the screwdriver component, knife bar 2, and protection sleeve 3, spring 4 is formed anti-skidding protection component with alignment pin 5, and the installation and the function of each component part are following:

Handle 1: it is nonmetal that handle is generally plastics or rubber etc., in order to be connected the moment of torsion when rotating to increase knife bar with knife bar 2 ends; It is cylindrical that profile is generally, and have several grooves, the frictional force when handing to increase.

Arbor 2: generally has high hardness, resistance to loss of material Mo, as the flat head shank 2, with a magnetic, for mounting screws and other similar classes slotted screws.The knife bar middle part is cylindrical, is provided with a radial direction through hole by rearward end, is used to install spacer pin 5.The knife bar end is provided with flat projection, can cooperate with handle 1, and is loosening when preventing to rotate.

Protection sleeve 3: profile is a tubular member, and wherein an end internal diameter is a bit larger tham knife bar 2 heads, can make knife bar 2 heads that activity space is arranged, and restriction rigging screw slippage;

The centre has a bit of internal diameter corresponding with knife bar middle part external diameter, is used for cooperating with knife bar 2, makes it to slide along knife bar; Protection sleeve other end internal diameter is slightly little, is used to hold spring 4 and makes it flexible in inside; The terminus inner of protection sleeve has symmetrical notch, is provided with the rotation draw-in groove in the notch, is used for protection sleeve is enclosed within on the alignment pin 5 and can lets alignment pin 5 along its axial rotation; At the terminal semicircle breach in addition of rotation draw-in groove, be used to block alignment pin 5, prevent that it from getting loose automatically.

Spring 4: be enclosed within on the knife bar 2, an end places in the protection sleeve 3, and the other end contacts with alignment pin 5; Make protection sleeve 3 entangle screw and cutter head all the time, when packing up protection sleeve 3, then compress protection sleeve 3, prevent that sleeve 3 from getting loose from alignment pin 5;

Alignment pin 5: be fixed in the radial direction through hole of knife bar 2, be used for carrying out spacing to spring 4; When packing up protection sleeve 3, fix protection sleeve 3.

Method for using

Screwdriver of the present invention is when rigging screw, and method of operating is following:

When A, the installation of outer surface screw:

1) rotary handle 1 separates protection sleeve with alignment pin, and protection sleeve is pushed to front end under spring 4 effect, screw 6 heads is packed in the protection sleeve, and match with cutter head, sends into installing plate 7 screwed holes then;

2) rotary handle 1 screws in installing hole fully with screw 6; At this moment protection sleeve 3 can be mounted plate 7 automatically and pushes back;

3) regain screwdriver, then protection sleeve 3 ejects under spring 4 pressure automatically, installs next time.

B, hole inner bolt installation process

1) protection sleeve 3 is back into handle end, the protection sleeve otch is alignd with alignment pin 5;

2) handle 1 is turned clockwise, make alignment pin 5 snap in the rotation draw-in groove; Loosen protection sleeve 3 then, make it fixing through be positioned automatically pin 5 of spring 4 pressure;

3) the turn assembling is positioned at the screw in hole.

Claims

1. screwdriver; Comprise handle (1), knife bar (2), said knife bar (2) rear end is provided with flat-ended protrusions, is connected with handle (1) one end matching and fixing; Knife bar (2) front end cutter head position is a flat, it is characterized in that: anti-skidding protective device is housed outside this screwdriver knife bar (2).

2. screwdriver as claimed in claim 1; It is characterized in that: said anti-skidding protective device is made up of protection sleeve (3), spring (4), alignment pin (5); Said protection sleeve (3) is a tubular structure, is provided with the center stepped hole, and the diameter of said centre bore and knife rod head corresponding end is greater than knife bar (2) head dimensions; The diameter at centre bore middle part is corresponding with knife bar middle part external diameter; Centre bore rear end diameter of bore is corresponding with spring (4) external diameter, and protection sleeve 3 rear ends are provided with and the corresponding draw-in groove of alignment pin (5) axial dimension, and said knife bar (2) rear end is provided with radial direction through hole; Alignment pin (5) is fixed in this radial direction through hole, and spring (4) is sleeved on knife bar (2) and goes up and place between protection sleeve centre bore step and the alignment pin (5).