CN2183855Y

CN2183855Y - Length-adjustable screwdriver

Info

Publication number: CN2183855Y
Application number: CN 94200025
Authority: CN
Inventors: 林益奖
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-03
Filing date: 1994-01-03
Publication date: 1994-11-30
Anticipated expiration: 2004-01-03

Abstract

The utility model belongs to a length-adjustable screwdriver of hand tools. The length-adjustable screwdriver is composed of 1-30 screwdriver bodies; each screwdriver body is composed of a drive part, an axial connection part and a holding part., wherein, the axial connection part is a quadrangular prism which is mutually matched with a hollow quadrangular prism on the cylindrical holding part of the other screwdriver body; knurling and an annular groove are arranged on the holding part; a hole is arranged on the groove, and is mutually communicated with the hollow quadrangular prism; a constricting sleeve is arranged on the groove to oppress a hole spring and a steel ball in the hole and to ensure each screwdriver body to be connected.

Description

Length-adjustable screwdriver

The utility model relates to a kind of improvement of hand tools, refers to a kind of length-adjustable screwdriver especially.

Existing screwdriver (or claim screwdriver, screwdriver, turn screw) as shown in Figure 1, is all formed with the handle 2 of the drive end 1 that drives the screw rotation, drive end opposite side and with the two axis part that connects 3 by embedding screw head recess basically.In use; usually can run into needs to change the length of screwdriver to satisfy the operation occasion of the different depths; for example in occasions such as the maintenance of repairing automobile, machine intimate, maintenances; sometimes the length of coping screw bottle opener own is not enough; can only cooperate the elongation arm to be operated as far as possible; not only inconvenient, and dangerous.

The purpose of this utility model is to provide a kind of novel screwdriver, can or increase its length according to on-the-spot needs rapid adjustment, reaches stable, safe, a kind of length-adjustable screwdriver easily.

Technology contents of the present utility model is as follows: its main points are that with 1-30 bottle opener body 10 be the unit, and cover picks out the screwdriver of different length, and Fig. 2 is the stereogram of a bottle opener body 10.This bottle opener body is made up of 3 parts, the front portion is called drive part 11, the geometry of screw terminal recessed portion tabling is made and is driven on the top of this part, for example cross, the flat degree of lip-rounding or square opening shape and other shapes that may occur, the root of drive part is connected with the part 13 that is coupling, and this part that is coupling is made 4 shuttle-shaped column shapes; Grip portions 12 is in the rear end of bottle opener body, and its profile is cylindric, processes annular knurl 121 on the face of cylinder, and the frictional force of finger or palm and grip portions when increasing work on the face of cylinder at the rear of grip portions, has an annular groove 16; On the tail plane of grip portions, inwardly axially process an empty quadrangular 14, on the face of the bottom of this sky quadrangular, process an axial hole 15(who is longer than drive part slightly again and see Fig. 3), like this when in the axial hole 15 that a bottle opener drive bulk is partly inserted another bottle opener body, the quadrangular of also having finished simultaneously a bottle opener body is coupling cooperating of part and another bottle opener body empty quadrangular (interior quadrangular), that is finished the installation of these two bottle opener bodies, the rest may be inferred, each bottle opener body can be unloaded to connect to satisfy on-the-spot required length.In order to increase the frictional force between 4 prisms and the empty quadrangular, guarantee to work reliably after the assembling, adopted lacing jacket--the frictional force of steel ball, guarantee to work reliably after the assembling, adopted lacing jacket-steel ball, the device of or lacing jacket--spring--steel ball, this device construction is as follows: on the face of cylinder of the annular groove of above-mentioned bottle opener body, bore a locating hole 161 along vertical handengagabie portion axis direction, up to communicating with empty quadrangular, and the size in the hole 162 on the quadrangular plane of requirement " communicating " is seen Fig. 5, be slightly less than the diameter of drill bit, so that can not fall into hollow quadrangular fully when steel ball 17 placed this locating hole but still allow its part to show locating hole, then, with a flexible bullet tension force lacing jacket 18 that tool is powerful, (its material can be the rubber of high elastic and strength) tightly is enclosed within on the annular groove, like this, when 4 prismatic with after empty quadrangular cooperates, lacing jacket can produce very big pressure to steel ball, after this pressure is pressed in 4 prismatic going up, cause powerful frictional force between 4 prismatic and the empty quadrangulars and guaranteed that the reliable of each bottle opener body is connected, in addition, the frictional force that also has 15 in drive part and hole, so each bottle opener body can not come off in the time of guaranteeing work, for larger-size screwdriver, because empty quadrangular wall is longer to distance between annular groove, only putting steel ball can not play a role, must in locating hole, put a compression spring 19 again, see Fig. 6, be located between steel ball and the lacing jacket to transmit lacing jacket to the pressure between the steel ball, certainly in order to make needs, also the above-mentioned part that is coupling can be manufactured 3 prisms or 5-8 prism, correspondingly empty quadrangular also can be made into sky triangular prism or sky prism on May Day eight.

Compared with the prior art, the utility model has following advantage:

1, size length is adjustable: the number after the combination of bottle opener body has promptly determined the length of this screwdriver, thereby has adapted to the needs at different scenes.

2, dismounting is rapid: impose limited axial force with hand, the bottle opener body can be pulled down or fit on, and very convenient; And, can not come off during operate as normal because the urgent steel ball of lacing jacket has guaranteed the reliable connection between each bottle opener body.

3, can regularly arrangedly deposit after the dismounting: it is little to account for volume.

Provided embodiment of the present utility model in conjunction with Fig. 2-6.

Fig. 1 is the D structure schematic diagram of existing screwdriver.

Fig. 2 is the three-dimensional exploded view of a bottle opener body of the present utility model.

Fig. 3 is the sectional plain-view drawing of Fig. 2.

Fig. 4 is the operation chart after each bottle opener body assembling of the utility model.

Fig. 5 is the action specification figure that the utility model lacing jacket and steel ball assemble the latter two, as first embodiment of the present utility model.

Fig. 6 is the stress figure behind adding pressurized of the present utility model and the steel ball and spring, as second embodiment of the present utility model.

Claims

1, a kind of length-adjustable screwdriver of being made up of drive division, grip part, axis part is characterized in that it is made up of 1-30 bottle opener body 10, and each bottle opener body will be divided into three parts, and these three parts are:

A, drive part 11, the front end of this part are the geometry with the screw head tabling that is driven;

It is 4 prismatic that B, the part 13 that is coupling, this part are, and its front end is connected with the rear end of drive part;

C, grip portions 12: this part profile is cylindrical, and annular knurl 121 is arranged on the face of cylinder; The grip portions front end is connected with the part rear end that is coupling, have an annular groove 16 on the face of cylinder of the rear end of grip portions, on this groove, have a locating hole 161 be positioned at the grip portions rear portion connect the empty quadrangular 14 that part matches with another bottle opener body shaft and communicate, have an axial hole 15 in the bottom of this sky quadrangular, to match with another bottle opener body drive part 11, a steel ball 17 is arranged in the described locating hole, and bind round on annular groove with a lacing jacket 18.

2, length-adjustable screwdriver as claimed in claim 1, the part that it is characterized in that being coupling also can be the geometrical body of 3 prisms or 5-8 prism.

3, length-adjustable screwdriver as claimed in claim 1, it also can be the geometrical body of sky triangular prism or sky prism on May Day eight that its spy is in empty quadrangular.

4, length-adjustable screwdriver as claimed in claim 1 is characterized in that allowing to place a compression spring 19 between steel ball and lacing jacket in locating hole 161.