CN101670570A

CN101670570A - Multi-functional screwdriver with transformable head

Info

Publication number: CN101670570A
Application number: CN200910192659A
Authority: CN
Inventors: 曾洪峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2010-03-17

Abstract

The invention relates to a multi-functional screwdriver with a transformable head, in particular to a screwdriver which is integrated with different openings such as straight line shape, hexangular shape, triangle shape and concave shape and specifications, and cross-shaped and star-like screws can be assembled and disassembled by the screwdriver, and the head of the screwdriver does not need dismounting and replacement. A set of retractor device is arranged in a handle of the screwdriver, and the retractor device uses at least seven or more than seven steel needles and springs with the corresponding quantity, pistons and piston cylinders of piston cavities, with the corresponding quantity to form a retractable screwdriver body, the outer side of the exposed part of the screwdriver body isprovided with a protective hollow steel jacket, the steel needles at the position of the screwdriver head can contract under the external extrusion action force which is larger than the critical deformation elasticity of the internal spring, at the moment, the spring is compressed and stores energy, when the external extrusion action force disappears, the spring releases energy to push the pistonand the steel needle to be stretched out and reset.

Description

Multi-functional screwdriver with transformable head

Technical field

The present invention relates to a kind of multi-functional screwdriver with transformable head, be a kind of can be at the screw of multiple difformity, different size and change the screwdriver tool that corresponding specification cutter head, especially the screw to " one " word, " ten " word, interior hexagonal, interior triangle, " star " shape, " protruding " shape opening all possesses the dismounting condition.

Background technology

Screwdriver is applied in all installation, maintenance engineerings, the screwdriver consumption maximum of " one " word, " ten " font specification wherein, along with the development of society, the screw of wide variety of shapes such as interior hexagonal, interior triangle, " star " shape, " protruding " shape opening and specification and corresponding screwdriver tool are used and are given birth to.In routine duties; run into the screw that is of little use as interior hexagonal, " protruding " shape opening etc. through regular meeting; because of the screwdriver tool of not wearing corresponding specification can't be carried out the work; and in existing screwdriver tool commonly used; major part is the man-to-man screwdriver tool of single gauge; if assort the screwdriver tool of all specifications, not only the instrument cost increases, and inconvenience is carried.Along with the development of society, produced the removable screwdriver tool of multiple driver bit on the market, the supporting driver bit of a plurality of specifications, but its cutter head changes trouble and easily loses, and therefore applying on market has been subjected to resistance.

Summary of the invention

The purpose of this invention is to provide a kind of multi-functional screwdriver with transformable head, the difformity and the specification of collection " one " word, hexagonal, triangle, " recessed " shape opening are the screwdriver tool of one, screw to " ten " word, " star " shape possesses the dismounting condition equally, and its driver bit need not disassembling, assembling and replacing.The main cover retractor device of having installed in the handle inside of screwdriver; this retractor device is worn the piston/cylinder of spring, piston and the respective numbers plunger shaft of respective numbers at least by 7 and above draw point; the screwdriver cutter hub that composition can stretch, the exposed parts arranged outside of cutter hub the protection hollow steel bushing.The draw point at driver bit place can produce contractive action when the outer squeezing action power that is subjected to greater than contained spring critical strain elastic force, this moment, spring was compressed and accumulation of energy, when squeezing action power outside this disappears, spring releases energy and promotes piston and draw point and stretch out and reset, based on above-mentioned principle, its technical scheme of multi-functional screwdriver with transformable head of the present invention is as follows:

At first the present invention is made up of shell, retractor device and locking device three parts:

At housing parts; comprised handle; lid; the driver bit protective sleeve; power-assisted circle and hollow steel bushing: be provided with the concave arc groove more than at least 1 on the handle especially; to be used to increase frictional resistance and the soft fricting strip of expansion increase; the inside of lid is provided with cylinder especially; the driver bit protective sleeve can be inserted on the cylinder when screwdriver uses; and screwdriver is after being used to complete; protective sleeve can take off and be enclosed within on the cutter head of screwdriver from cylinder; with the protection cutter head; in development of the present invention; the length setting of hollow steel bushing is the optimum condition that screwdriver uses when 10mm is in the scope of 300mm.

Retractor device has comprised cushion block, spring, piston, piston/cylinder and draw point: draw point is injection moulded the one encapsulation when producing piston, the kinetic energy size of retractor device is determined by outer squeezing action power, outer squeezing action power is big more, camber of spring is big more, the energy that discharges is also big more, and the telescopic level of draw point (being the shape of driver bit) is then determined by the shape of stressed acting surface.With " one " word flat head screw nail is example: when extruding force acts on the tack of " one " word screw outside screwdriver is subjected to, " one " word groove that coping screw nails on temporarily can not provide the backward extrusion active force, the draw point of groove contact remains static therewith, and will be subjected to the backward extrusion active force on screw cap plane with the draw point of plane contact beyond the screw groove, draw point herein will produce contractive action and promote piston and extrusion spring contraction accumulation of energy, promptly being equivalent to static draw point transfers relative dynamic to and extend in the groove, can extend into the bottom that draw point in the groove all reaches groove up to all, final formation and " one " word screw corresponding " " word driver bit, be available screwdriver dismounting screw this moment; When the outer squeezing action power of screwdriver disappears, compressed spring is released and can be rebounded, promotion piston and draw point stretch out and reset, promptly being equivalent to " one " word driver bit shrinks and resets, for the screw of hexagonal, interior triangle, " protruding " shape opening in other etc., the operation principle of screwdriver is all identical with aforementioned operation principle.

Locking device has comprised clamp ring and clamping limb: the inside of clamp ring is provided with the reducing arc chute especially, along with clockwise rotating of clamp ring, slide block on the clamping limb is influenced by the reducing of arc chute and promotes clamping limb to move to the center of circle of clamp ring, makes clamping limb clamp draw point.Clockwise rotate clamp ring when being out of shape as finishing at driver bit, draw point was held arm and clamped this moment, when the outer squeezing action power of screwdriver disappears, because of the bounce of spring can not promote piston and draw point, promptly be equivalent to driver bit and be finalized, thereby reach the locking purpose.Change to another kind of cutter head shape from a kind of cutter head shape as the need screwdriver, can rotate counterclockwise clamp ring draw point is resetted, and repeat the operation principle of aforementioned screwdriver.

Description of drawings

In the accompanying drawing: 1-lid, 2-handle, 3-draw point, 3A-regular hexagon draw point; 3B-V shape draw point, 4-clamp ring, the hollow steel bushing of 5-, 6-clamping limb; the 7-spring, 8-piston, 9-piston/cylinder, Coin operated mouthful of 10-; the 11-cylinder, 12-arc chute, 13-hook, 14-cushion block; the 15-slide block, 16-pressure ring, 17-compression leg, the outer silk of 18-screw thread; 19-internal thread screw thread, 20-concave surface gathering hole, 21-big piston chamber, 22-valve piston chamber; the 23-piston head, the 24-elastic arm, 25-controls the inclined-plane, and 26-locatees scrobicular ring; 27-power-assisted circle, 28-chamber, 29-fillet; 30-driver bit protective sleeve, 31-cylindrical cavity, 32-concave arc groove; 33-V clevis groove, 34-inclined-plane, chamber, 35-side.

Fig. 1 is the E-E generalized section of Fig. 3;

Fig. 2 is the front view of screwdriver;

Fig. 3 is the mansion view of screwdriver;

Fig. 4 removes mansion view behind the cutter head protective sleeve for screwdriver;

Fig. 5 is the D-D sectional view of Fig. 1;

Fig. 6 is the A-A sectional view of Fig. 1;

Fig. 7 is the mansion view of piston/cylinder;

Fig. 8 is the B-B sectional view of Fig. 1;

Fig. 9 is the C-C sectional view of Fig. 1;

Figure 10 is the upward view of screwdriver;

Figure 11 is the partial enlarged drawing of locking device;

Figure 12 is the driver bit profile.

Embodiment

Multifunctional screw driver before exemplary embodiment is to use, handle 2 middle parts are hollow, are used to install retractor device, and the outer ring of handle 2 has the concave arc groove 32 more than at least 1, is used to increase frictional force and the soft fricting strip of expansion increase.

The upper end of handle 2 is a screwdriver lid 1; the exposed parts of lid 1 is a dome, and lid 1 is connected by outer silk screw thread 18, internal thread screw thread 19 with handle 2, and two concave surface gathering holes 20 are arranged at the top of lid 1; be used to take out driver bit protective sleeve 30, driver bit protective sleeve 30 is fixing by the cylinder in the cylindrical cavity 31 11.Center by concave surface gathering hole 20, cylindrical cavity 31, cylinder 11 has Coin operated mouthful 10, when this gathering hole 10 is put into the monobasic coin, promptly can use the lid 1 of coin dismounting screwdriver.

Cushion block 14 is between lid 1 and piston/cylinder 9, the function of cushion block is a pressing spring 7, driving spring 7 when preventing to cover 1 rotation simultaneously rotates and the generation dislocation, on lid 1, be provided with pressure ring 16 and pressure point 17 especially, when lid 1 rotation, have only pressure ring 16 to contact cushion block 14, thereby significantly reduce frictional resistance with pressure point 17.

Piston 8 is inserted in the valve piston chamber 22 in the piston/cylinder 9, piston head 23 on the piston 8 is inserted in the big piston chamber 21, piston 8 can upwards move in big piston chamber 21 by 22 promotion piston heads 23 along the valve piston chamber, and when piston 8 moves down, its piston head 23 promptly stops to move after running into the side in valve piston chamber 22, this contact position is set to the reduction point of driver bit, also is the original state position before screwdriver uses.

Spring 7 is between cushion block 14 and piston head 23, for each piston 8 and draw point 3 provide the power that resets.

Piston/cylinder 9 in the exemplary embodiment is a regular hexagon cylinder body: have 1 overlapping big piston chamber 21, a valve piston chamber 22 at the cylinder body center, and arranging by 6 on every side of

heart plunger shaft

21,22 is uniform-distribution with 30 overlapping big piston chambeies 21, valve piston chamber 22 therein, the angle that every row's plunger shaft is 21,22 is 60 degree, be communicated with and be communicated with between every row's big piston chamber 21, valve piston chamber 22 are adjacent with the plunger shaft at center, this width of channel is less than the diameter in valve piston chamber 22, for dismounting draw point 3 provides passage.

Draw point 3 in the exemplary embodiment adds up to 31: the head of draw point 3 passes hollow steel bushing 5, and stretch out 2mm to 8mm in the exit of hollow steel bushing 5, the center draw point of draw point 3 is regular hexagon draw point 3A, the whole piece draw point is straight and only have 1, its in 30 draw points be V-arrangement draw point 3B, V limit angle is 120 degree, and be evenly distributed on 6 angles of regular hexagon draw point, V-arrangement draw point 3B from inside to outside according to width by arranging from being too narrow to wide order, in the exit of hollow steel bushing 5, regular hexagon draw point 3A stretches out the longest, and V-arrangement draw point 3B presses the step shape from inside to outside and arranges, the middle part of V-arrangement draw point 3B is converted into " Z " shape, and afterbody then is packaged as a whole with piston 8 injection mouldings.

Form locking device by clamping limb 6 and clamp ring 4: clamping limb 6 can be inserted in the square chamber 35 that is provided with on the handle 2, and 6 angles of corresponding draw point 3,6 arc chutes 12 are arranged in the clamp ring 4, the center of circle of clamp ring 4 is departed from the center of circle of arc chute 12, be that arc chute 12 two ends are unequal to the distance in clamp ring 4 centers of circle, when clamp ring 4 when clockwise rotating, arc chute 12 extruding slide blocks 15 drive clamping limb 6 and move to the center of circle of clamp ring 4 gradually, clamp draw point 3 by the V-arrangement clip slot on the clamping limb 6 33, reach the locking purpose.

Fillet 29 is worn at two of slide block 15 exterior angles among Figure 11, is in order to reduce the wearing and tearing of 15 pairs of arc chutes 12 of slide block.

The

elastic arm

24 and 2 injection moldeds of handle that have hook 13, inclined-plane 25 slips and driving elastic arm 24 and hook 13 are controlled in the inside edge of locking circle 4 to enter in the chamber 28 that is arranged on elastic arm 24 back, hook 13 on the elastic arm 24 is accompanied by the slip of locking circle 4 and finishes on the quick location scrobicular ring 26 that rebounds, thereby finishes the locking to clamp ring 4.

The inboard of clamp ring 4 for the circle, and below be provided with especially the location scrobicular ring 26, the outside is a hexahedron, inclined-plane 34 is arranged at 12 angles of hexahedron.

5 of the hollow steel bushings of the screwdriver of exemplary embodiment draw and schematically illustrate, be because this hollow steel bushing 5 can be produced the screwdriver of different length according to the different operating demand, the head end that is injected into the hollow steel bushing 5 of one with handle 2 is provided with two straight flanges, and be provided with power-assisted circle 27 especially, be used to increase the torsion of hollow steel bushing 5.

In the multi-functional screwdriver with transformable head of the present invention; removing driver bit protective sleeve 30 is the rubber material; spring 7, cushion block 14, draw point 3, power-assisted circle 27, clamping limb 6 and hollow steel bushing 5 are metal material, and arc chute 12 is that all the other are plastic material outside metal material or the plastic material.

Above-mentioned all disclosed features are all related to the present invention, and realize by the present invention who limits in the claims.

Claims

1, multi-functional screwdriver with transformable head, comprise by shell, retractor device and locking device three parts and forming: housing parts has comprised handle 2, lid 1, driver bit protective sleeve 30, power-assisted circle 27 and hollow steel bushing 5, it is characterized in that: handle 2 is connected via outer silk screw thread 18, internal thread screw thread 19 with lid 1, and the chamber 28 after handle 2 has the elastic arm 24 of buckle 13 and is arranged on elastic arm 24 is used for the location to locking device; Retractor device has comprised cushion block 14, spring 7, piston 8, piston/cylinder 9 and draw point 3, it is characterized in that: the spring 7 of wearing respective numbers at least by 7 and above draw point 3, piston 8 and respective numbers big piston chamber 21, the piston/cylinder 9 in valve piston chamber 22, the screwdriver cutter hub that composition can stretch, the exposed parts arranged outside of cutter hub the protection hollow steel bushing 5, the draw point 3 at driver bit place can produce contractive action when the outer squeezing action power that is subjected to greater than contained spring 7 critical strain elastic force, this moment, spring 7 was compressed and accumulation of energy, when squeezing action power outside this disappeared, spring 7 was released can rebound promotion piston 8 and draw point 3 and is stretched out and reset; Locking device has comprised clamp ring 4 and clamping limb 6, it is characterized in that: draw point 3 is moved and clamped to clockwise rotating of clamp ring 4 with promotion clamping limb 6 to draw point 3, reaches the locking purpose.

2, multi-functional screwdriver with transformable head according to claim 1, it is characterized in that: described handle 2 outsides have the concave arc groove 32 more than 1, concave arc groove 32 can be expanded increases soft fricting strip, and handle 2 downsides have 6 square chambeies 35 that clamping limb 6 can insert.

3, according to one of aforementioned claim or multinomial or especially according to the described multi-functional screwdriver with transformable head in back; it is characterized in that: the exposed parts of described lid 1 is a dome; the top center of lid 1 has cylinder 11; driver bit protective sleeve 30 is enclosed within on the cylinder 11 by cylindrical cavity 31; the both sides of cylindrical cavity 31 have concave surface gathering hole 20; center by concave surface gathering hole 20, cylindrical cavity 31, cylinder 11 has Coin operated mouthful 10; pressure point 17 is arranged on the center of covering 1 bottom, and pressure ring 16 is arranged on the outside of covering 1 bottom.

4, according to one of aforementioned claim or multinomial or especially according to the described multi-functional screwdriver with transformable head in back, it is characterized in that: described piston/cylinder 9 is a regular hexagon cylinder body, has 1 overlapping big piston chamber 21 at the cylinder body center, valve piston chamber 22, and the heart is big therein, valve piston chamber 21, be uniform-distribution with at least 6 and above overlapping big piston chamber 21 by 6 rows around 22, valve piston chamber 22, every row is big, valve piston chamber 21,22 angle is 60 degree, every row's big piston chamber 21, be communicated with between valve piston chamber 22 is adjacent and be communicated with the plunger shaft at center, this width of channel is less than the diameter in valve piston chamber 22.

5,, and only can in big piston chamber 21, move according to one of aforementioned claim or multinomial or especially according to the described multi-functional screwdriver with transformable head in back, it is characterized in that: an end of described piston 8 has piston head 23.

6, according to one of aforementioned claim or multinomial or especially according to the described multi-functional screwdriver with transformable head in back, it is characterized in that: the head of described draw point 3 passes hollow steel bushing 5, and stretch out 2mm to 8mm in the exit of hollow steel bushing 5, the center draw point of draw point 3 is regular hexagon draw point 3A, the whole piece draw point is straight and only have 1, it is V-arrangement draw point 3B at least 6 and above draw point, V limit angle is 120 degree, and be evenly distributed on 6 angles of regular hexagon draw point 3A, V-arrangement draw point 3B from inside to outside according to width by arranging from being too narrow to wide order, exit at hollow steel bushing 5, regular hexagon draw point 3A stretches out the longest, V-arrangement draw point 3B presses the step shape from inside to outside and arranges, and the middle part of V-arrangement draw point 3B is converted into " Z " shape, and afterbody then is packaged as a whole with piston 8 injection mouldings.

7, according to one of aforementioned claim or multinomial or especially according to the described multi-functional screwdriver with transformable head in back, it is characterized in that: the length setting of described hollow steel bushing 5 is in 10mm arrives the scope of 300mm, the corresponding shape that is slightly larger than after draw point 3 is arranged of the hollow part of hollow steel bushing 5, be provided with two straight flanges with an end of handle 2 injection mouldings encapsulation, and be provided with power-assisted circle 27 especially.

8, according to one of aforementioned claim or multinomial or especially according to the described multi-functional screwdriver with transformable head in back, it is characterized in that: 6 arc chutes 12 are arranged in the described clamp ring 4, the center of circle of clamp ring 4 is departed from the center of circle of arc chute 12, be that arc chute 12 two ends are unequal to the distance in clamp ring 4 centers of circle, the inboard of clamp ring 4 is circle, and below have the location scrobicular ring 26, the outside is a hexahedron, inclined-plane 34 is arranged at 12 angles of hexahedron.

9, according to one of aforementioned claim or multinomial or especially according to the described multi-functional screwdriver with transformable head in back, it is characterized in that: clamping limb 6 has V-arrangement clip slot 33 with draw point 3 contact positions, V groove angle is 120 degree, the other end of clamping limb 6 is provided with slide block 15, fillet 29 is worn at two exterior angles of slide block 15, and extend in the arc chute 12 of clamp ring 4.

10, according to or multinomial described multi-functional screwdriver with transformable head of aforementioned claim; it is characterized in that: remove driver bit protective sleeve 30 and be the rubber material; spring 7, cushion block 14, draw point 3, power-assisted circle 27, clamping limb 6 and hollow steel bushing 5 are metal material; arc chute 12 is that all the other are plastic material outside metal material or the plastic material.