CN106914848A - The torsion release of the fast de- inversion structures of tool - Google Patents

The torsion release of the fast de- inversion structures of tool Download PDF

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Publication number
CN106914848A
CN106914848A CN201510999675.6A CN201510999675A CN106914848A CN 106914848 A CN106914848 A CN 106914848A CN 201510999675 A CN201510999675 A CN 201510999675A CN 106914848 A CN106914848 A CN 106914848A
Authority
CN
China
Prior art keywords
foregoing
screwdriver head
collar
tool
slip ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510999675.6A
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Chinese (zh)
Inventor
陈河田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201510999675.6A priority Critical patent/CN106914848A/en
Publication of CN106914848A publication Critical patent/CN106914848A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers

Abstract

A kind of torsion release for having fast de- inversion structures, it is to be arranged a removable body in the outside of various types of ball torsion releases, through the dismounting removable body, torsion release quickly and the operation of reversion screw can be conveniently accomplished, and solve the problems, such as that the snap flange of existing torsion release clashes into fracture by outer sleeve or outer sleeve blocks snap flange and causes the fashionable depth of screwed lock unstable or instrument is using having some setbacks and be inconvenient to carry out reversion screw to operate.

Description

The torsion release of the fast de- inversion structures of tool
Technical field
The present invention is a kind of torsion release for having fast de- inversion structures;Espespecially a kind of setting in torsion release can divide From the sheath structure of formula, using quick assembling and the dismounting of the body, to complete lock screw and the shifting of torsion release Except the operation of screw.
Background technology
According to existing general common torsion release, such as TaiWan, China disclosure of the invention of inventor's previously application the No. 200906565 " instrument screwdriver head torsion discharges and clutch structure ", the torsion release disclosed by its Fig. 1-3 is An inner sleeve 16 is arranged in the periphery of extension bar body 1, and spring is provided between the extension bar body and inner sleeve 16 151, obtain inner sleeve 16 and place telescopic slide in the outer of extension bar body 1, and moved to steel using the inner sleeve 16 Releasing effect produced by pearl 130, enables the screwdriver head 17 being located in extension bar body 1 to be produced with extension bar body 1 The effect for separating and combining, reversion snap flange 12 is set then at the extension bar body 1, and inner sleeve 16 sets and lacks Mouthful, allow user that the breach of inner sleeve 16 must be passed through the snap flange 12 of extension bar body 1 when screw is inverted, Rotating inner sleeve 16 again makes snap flange 12 block inner sleeve 16, screwdriver head 17 is directly inverted taking-up screw The continuing spinning without the separating effect produced by steel ball 130.And the torsion release disclosed by its Fig. 6-20 It is also to be arranged an outer sleeve 4 in the periphery of extension bar body 2, and bullet is provided between the extension bar body and outer sleeve 4 Spring 212, obtains outer sleeve 4 and places telescopic slide in the outer of extension bar body 2, and move right using the outer sleeve 4 Releasing effect produced by steel ball 240, enables the screwdriver head 3 being located in extension bar body 2 to be produced with extension bar body 2 Effect from combination estranged, reversion snap flange 22 is set then at the extension bar body 2, and outer sleeve 4 sets and lacks Mouth 410, allows user the engaging of extension bar body 2 must be passed through convex the breach 410 of outer sleeve 4 when screw is inverted Edge 22, then rotary sleeve ring 4 makes snap flange 22 block outer sleeve 4, screwdriver head 3 is directly inverted taking-up spiral shell Silk continuing spinning without the separating effect produced by steel ball 240.
Or " power conveying type screw screws in and exits dual-purpose being automatically stopped such as new No. M374936 of TaiWan, China Device ", it is also arranged a upper and lower casing 1,2 in the periphery of main shaft 3, and in the main shaft 3 with it is upper and lower Be provided with spring 4 between housing 1,2, make upper and lower casing 1,2 place telescopic slide in the outer of main shaft 3, and Using the upper and lower casing 1,2 movement to the releasing effect produced by the first steel ball 34a, make to be located in main shaft 3 Tool heads 6 are able to be produced with main shaft 3 effect for separating and combining, and reversion projection 32 is set then at the main shaft 3, Upper shell 1 sets chute 12, allows user the chute 12 of upper shell 1 must be passed through into main shaft 3 when screw is inverted Projection 32, then rotating upper and lower casing 1,2 makes projection 32 block upper and lower casing 1,2, makes tool heads 6 Can directly invert taking-up screw without the separating effect produced by the first steel ball 34a continuing spinning.
However, above-mentioned three kinds general torsion releases common on the market, be only position that spring is set or mode not Together, the principle that it is used is all similar to structure, and is all that setting one is convex on axostylus axostyle for the design of reversion screw Edge or projection, then coordinate the design of the breach or chute of outer sleeve or shell body, outer sleeve or shell body is inside contracted Positioning, the screwdriver head of protrusion directly can be inverted screw and takes out.And the shortcoming of these existing torsion releases exists In:
First, on its axostylus axostyle set snap flange or projection when using usually can constantly with outer sleeve or outer Housing clashes into mutually so that snap flange or projection have the risk for being severed, and if the snap flange or projection hit Disconnected, then the torsion release is to lose the function of reversion screw and cannot be continuing with.
Second, torsion release vibrations produced when in use can make outer sleeve or shell body produce rotation offset, Snap flange or projection on axostylus axostyle is often set to correspond to the breach or cunning of outer sleeve or shell body in use Groove, makes outer sleeve or shell body be stuck in the position of reversion screw, causes to use upper inconvenience.
3rd, the existing torsion release is to reduce outer sleeve when using or the vibrations produced by shell body, therefore all must The shock resistance of outer sleeve or shell body is lifted using thicker spring, however, the overstriking spring can not only increase The volume of torsion release, weight and cost, its maximum problem is that the lifting of spring strength can influence user to draw Force needed for dynamic outer sleeve or shell body, along with snap flange or projection it is original be difficult to correspond to outer sleeve or The breach or chute of shell body, therefore, the existing torsion release allow user reversion screw operation on very Inconvenience, does not have practicality.
4th, the existing torsion release because the part that screwdriver head exposes is shorter, and is subject to when screw is inverted The view obstruction of outer sleeve or shell body, therefore screwdriver head is less susceptible to be directed at screw, the operation of influence reversion screw.
Therefore, present inventor, the research and development of many yearly correlation screw tools of product and manufacturing experience, for foregoing existing torsion The shortcoming of release is studied with problem, and invention this case.
The content of the invention
The purpose of the present invention, is the breach of the snap flange structure with outer sleeve of the extension bar for deleting existing torsion release Structure, and a removable body is arranged in the outside of various types of ball torsion releases, through removing, this is removable Formula body, makes torsion release quickly and can be conveniently accomplished the operation of reversion screw, and solve the release of existing torsion The snap flange of device is clashed into by outer sleeve and is broken, with the problem for being inconvenient to carry out inverting screw operation.
The torsion release of the fast de- inversion structures of tool of the present invention, including at least extension bar, screwdriver head, slip ring With body, foregoing extension bar sets joint portion, and the other end in joint portion is chosen a place to give a banquet body, and the end recessed of the pedestal is recessed Groove, and in the multiple perforation of collar setting of groove, to be installed with a ball respectively in wherein;Foregoing screwdriver head is arranged at In the groove of foregoing extension bar;Foregoing slip ring is sheathed on the periphery of foregoing extension bar, between the slip ring and foregoing extension bar An axially arranged spring, enables slip ring in the axial direction slip relative with extension bar, and the inner side of foregoing slip ring is in right The twelve punch y of foregoing extension bar is answered to install the first collar and the second collar, foregoing second collar is arranged under the first collar Side, and the second collar internal diameter more than the first collar internal diameter;Foregoing body is sheathed on the periphery of foregoing slip ring, The length of foregoing body coordinates extension bar to lock depth with the assembled length and screw of screwdriver head and set, foregoing slip ring and Snap-fit element is provided between body, after slip ring is inserted body, is able to utilize snap-fit element by body and slip ring Engaging positioning.
The torsion release of the fast de- inversion structures of tool of the present invention, the wherein bottom of aforementioned grooves sets one and supports Element, and the tail end of foregoing screwdriver head is supported with a supporting way, reduce mill when extension bar dallies and between screwdriver head Wipe power;And aforementioned grooves are one setting elements of setting at interior collar, to position screwdriver head and avoid screwdriver head from skidding off Groove.
The torsion release of the fast de- inversion structures of tool of the present invention, wherein the upper end of foregoing pedestal sets an annular Groove, to be arranged a clasp, the interposition of foregoing pedestal installs one first limit element;Foregoing slip ring in the One collar top sets the second limit element, obtains second limit element mutual with the first limit element of foregoing pedestal Offset top contact, and the second limit element using slip ring and the bullet that is arranged between the second limit element and clasp Spring, obtains slip ring and is slided between the clasp and the first limit element of foregoing pedestal.
The torsion release of the fast de- inversion structures of tool of the present invention, wherein foregoing snap-fit element must be an elastic ring Body, magnet or fastener, and the periphery of foregoing body set up defences sliding grip part, and body is dismounted in order to user.
The torsion release of the fast de- inversion structures of tool of the present invention, wherein the lower end of foregoing body sets one supporting Ring, and magnet is set in the interior collar for supporting ring, screw head is directly held with using the magnet, allow screw to be able to Firm is installed on body.
Brief description of the drawings
Fig. 1 is the decomposition view of the torsion release of the fast de- inversion structures of tool of the present invention.
Fig. 2 is the decomposition view of the body assembling of the torsion release of the fast de- inversion structures of tool of the present invention.
Fig. 3 is the stereogram of the torsion release of the fast de- inversion structures of tool of the present invention.
Fig. 4 is the front view of the torsion release of the fast de- inversion structures of tool of the present invention.
Fig. 5 is the sectional view of the line A-A along Fig. 4.
Fig. 6 is the sectional view disassembled with assembling of body of the present invention.
Fig. 7 is the action diagram () of the Locking screw of the torsion release of the fast de- inversion structures of tool of the present invention.
Fig. 8 is the action diagram (two) of the Locking screw of the torsion release of the fast de- inversion structures of tool of the present invention.
Fig. 9 is the action diagram (three) of the Locking screw of the torsion release of the fast de- inversion structures of tool of the present invention.
Figure 10 is the action diagram of the reversion screw of the torsion release of the fast de- inversion structures of tool of the present invention.
【Main element symbol description】
Extension bar 1
The groove 12 of 10 pedestal of joint portion 11
Perforate 13 balls 130
Support the setting element 15 of element 14
The clasp 160 of annular groove 16
The limit element 18 of baffle ring 17 first
Screwdriver head 2
The spring 30 of slip ring 3
The limit element 33 of first collar, 31 second collar 32 second
The snap-fit element 41 of 4 stop section of body 40
Support the magnet 44 of ring 43 in grip part 42
Screw 5
Works 6
Specific embodiment
In order to further understand the invention, the implementation of the torsion release of the optimal fast de- inversion structures of tool Mode is comprised at least as shown in Fig. 1~10:
Extension bar 1, if joint portion 10, the joint portion 10 is to be used to be combined with various known hand-operated tools or electric tool, The other end of foregoing joint portion 10 is chosen a place to give a banquet body 11, the recessed groove 12 in end of the pedestal 11, to be installed with screwdriver head 2, and collar in groove 12 sets multiple perforation 13, to be installed with a ball 130 respectively in wherein, and through each The common clamping screwdriver head 2 of ball 130;The bottom of aforementioned grooves 12 must set one and support element 14, and with a branch Support mode supports the tail end of the screwdriver head 2, reduces friction when extension bar 1 dallies and between screwdriver head 2, and preceding State groove 12 and also obtain one setting element 15 of setting at interior collar, to position screwdriver head 2 and avoid screwdriver head 2 from sliding Go out groove 12.The upper end of foregoing pedestal 11 must set an annular groove 16, to be arranged a clasp 160, and foregoing seat Body 11 is also able to set a baffle ring 17, and the baffle ring 17 is arranged at pedestal 11 through foregoing clasp 160 On without deviating from, the centre position of foregoing pedestal 11 sets one first limit element 18.
Screwdriver head 2, is disposed in the groove 12 of foregoing extension bar 1, and the bar portion of foregoing screwdriver head 2 is non-circular Structure (such as hexagonal cylindricality), enables foregoing ball 130 to support and press from both sides jointly mutually with the bar portion of the screwdriver head 2 Gu screwdriver head 2;The locking part of the end of foregoing screwdriver head 2 is to coordinate the lock apertured shape of screw and set, and makes screwdriver head 2 It is able to drive screw to rotate.
Slip ring 3, is sheathed on the periphery of foregoing extension bar 1, axially arranged between the slip ring 3 and foregoing extension bar 1 One spring 30, enables slip ring 3 in the axial direction slip relative with extension bar 1, and the inner side of foregoing slip ring 3 is right The position of perforation 13 of foregoing extension bar 1 is answered to set the first collar 31 and the second collar 32, foregoing second collar 32 is set Internal diameter in the lower section of the first collar 31, and the second collar 32 is more than the internal diameter of the first collar 31, in this way, when cunning When first collar 31 of rotating ring 3 is located at 13 position of perforation of extension bar 1, the ball 130 in perforation 13 must be made and risen The collar 31 of son first 2 and first supports contact mutually, makes the common clamping screwdriver head 2 of ball 130 and drives screwdriver head 2 Rotate, and when the second collar 32 of slip ring 3 is located at 13 position of perforation of extension bar 1, due to the second collar 32 Internal diameter it is larger, therefore ball 130 can the second collar 32 is pushed to by screwdriver head 2, extension bar 1 is driven screwdriver head 2 rotate and produce idle running phenomenon.Foregoing slip ring 3 is obtained and sets the second limit element 33 in the top of the first collar 31, Second limit element 33 is obtained to be contacted with mutual the supporting of the first limit element 18 of foregoing pedestal 11, and using cunning Second limit element 33 of rotating ring 3 and it is arranged between the second limit element 33 and clasp 160 (or baffle ring 17) Spring 30, enable slip ring 3 in foregoing pedestal 11 clasp 160 (or baffle ring 17) with first spacing yuan Slided between part 18.
Body 4, is sheathed on the periphery of foregoing slip ring 3, and the length of foregoing body 4 is to coordinate extension bar 1 and bottle opener First 2 assembled length and screw is locked depth and is set, and the inner side of foregoing body 4 sets stop section 40, with limit slippage Ring 3 is inserted in the depth in body 4, and snap-fit element 41 is provided between foregoing slip ring 3 and body 4, makes cunning After rotating ring 3 inserts body 4, obtain and body 4 is engaged into positioning with slip ring 3 using snap-fit element 41, and prevent set Body 4 comes off, and foregoing snap-fit element 41 must be for an elastic ring body (as shown in Fig. 1 and 5), magnet or other are readily removable Fastener of solution etc., can not, as long as can facilitate by body 4 repeat install with dismounting.Foregoing body 4 The grip part 42 that periphery is set up defences sliding, body 4 is dismounted in order to user;The lower end of foregoing body 4 sets one and supports Ring 43, and magnet 44 is set in the interior collar for supporting ring 43, the head of screw 5 is directly held with using the magnet 44, Screw 5 is allowed to be able to firm being installed on body 4;Certainly, foregoing body 4 can also be not provided with supporting ring 43, only A magnet 44 is set in the lower end of body 4, the head of screw 5 is directly held with using the magnet 44, allow screw 5 Be able to it is firm be installed on body 4, hold depending on the demand for using.
As shown in Fig. 7 and 9, the torsion release of the fast de- inversion structures of tool of the present invention when lock sets screw 5, It is that the joint portion of extension bar 1 is connected into hand-operated tools or electric tool, and by the head combination screwdriver head 2 of a screw 5, And the absorption that the magnet 44 of body 4 consolidates screw 5 must be passed through, prevent screw 5 from dropping;Now, slip ring 3 The first collar 31 support ball 130 in perforation 13 jointly with screwdriver head 2, make each ball 130 common clamping Screwdriver head 2, allows extension bar 1 that screwdriver head 2 can be driven to rotate, and screw 5 is locked in works 6 (such as Fig. 7 institutes Show);When screw 5 continues to lock downwards in works 6, ring 43 i.e. meeting and structure are supported in the lower end of body 4 Thing 6 supports contact (as shown in Figure 8) mutually, and as screw 5 is persistently locked in works 6, the body 4 Can reversely be promoted by works 6, then drive slip ring 3 to be moved rearwards by through body 4 is synchronous, when slip ring 3 The first collar 31 be moved out of perforation 13 position when, you can make the ball 130 in perforation 13 by screwdriver head 2 Push the second collar 32 to, allow extension bar 1 to produce idle running phenomenon, it is to avoid screw 5 is excessively locked in works 6, is completed Screw locks operation (as shown in Figure 9).
As shown in Figure 10, tool of the present invention takes off the torsion release of inversion structures when screw 5 is inverted, only soon Body 4 need to be removed, you can screw 5 is inverted into taking-up, diminished due to removing the volume of torsion release of body, And the length that screwdriver head 2 exposes increases, allow user that the position of screwdriver head 2 can be seen clearly that when screw is inverted, Screwdriver head 2 is directed at screw head to facilitate, being produced without being blocked by torsion release cannot be to level The problem put.
Further, since torsion release of the present invention has no setting snap flange, therefore in operation will not Sever snap flange;Or slip ring 3 is engaged the problem that flange is blocked.And no matter using thick, thin, soft or Hard spring 30, using operating entirely without influence, also causes bullet all on the torsion release regardless of instrument vibrations Spring 30 rock or user whether can compression spring 30 easily problem, allow producer discharged according to various torsion The design alternative proper volume of device or the spring 30 of size, lift the practicality of torsion release, are the composition of this case.
Foregoing embodiment or schema and non-limiting product aspect of the invention, structure or occupation mode, it is any affiliated Have the appropriate change or modification of usually intellectual in technical field, all should be regarded as not departing from patent category of the invention.

Claims (10)

1. it is a kind of to have the fast torsion release for taking off inversion structures, it is characterised in that to comprise at least:
Extension bar, if joint portion, and the other end in joint portion chooses a place to give a banquet body, the recessed groove in end of the pedestal, To be installed with screwdriver head, and collar in groove sets multiple perforation, to be installed with a ball respectively in wherein, and Carry out common clamping screwdriver head through each ball;
Screwdriver head, is arranged in the groove of foregoing extension bar;
Slip ring, is sheathed on the periphery of foregoing extension bar, an axially arranged bullet between the slip ring and foregoing extension bar Spring, makes slip ring obtain in the axial direction slip relative with extension bar, and the inner side of foregoing slip ring is in the foregoing extension bar of correspondence Twelve punch y install the first collar and the second collar, foregoing second collar is arranged at the lower section of the first collar, and Internal diameter of the internal diameter of the second collar more than the first collar;
Body, is sheathed on the periphery of foregoing slip ring, and the length of foregoing body is to coordinate extension bar and screwdriver head Assembled length and screw are locked depth and are set, and stop section is set on the inside of foregoing body, are entered with limit slippage ring set The internal depth of set, and snap-fit element is provided between foregoing slip ring and body, slip ring is inserted body Afterwards, obtain and body is engaged into positioning with slip ring using snap-fit element.
2. tool as claimed in claim 1 takes off the torsion release of inversion structures soon, it is characterised in that aforementioned grooves Bottom sets one and supports element, and the tail end of foregoing screwdriver head is supported with a supporting way, reduces extension bar idle running When and screwdriver head between friction.
3. the torsion release of the fast de- inversion structures of tool as claimed in claim 1, it is characterised in that aforementioned grooves in One setting element is set at interior collar, to position screwdriver head and avoid screwdriver head from skidding off groove.
4. tool as claimed in claim 1 takes off the torsion release of inversion structures soon, it is characterised in that foregoing pedestal Upper end sets an annular groove, and to be arranged a clasp, the centre position system of foregoing pedestal sets one first spacing yuan Part;Foregoing slip ring in the first collar top set the second limit element, make second limit element with First limit element of foregoing pedestal supports mutually contact, and the second limit element using slip ring and setting Spring between the second limit element and clasp, obtains slip ring spacing with first in the clasp of foregoing pedestal Slided between element.
5. tool as claimed in claim 4 takes off the torsion release of inversion structures soon, it is characterised in that foregoing pedestal sets A baffle ring is put, and the baffle ring is arranged on pedestal without deviating from through foregoing clasp.
6. tool as claimed in claim 1 takes off the torsion release of inversion structures soon, it is characterised in that foregoing engaging unit Part must be an elastic ring body, magnet or fastener.
7. tool as claimed in claim 1 takes off the torsion release of inversion structures soon, it is characterised in that foregoing body Periphery is set up defences sliding grip part, and body is dismounted in order to user.
8. tool as claimed in claim 1 takes off the torsion release of inversion structures soon, it is characterised in that foregoing body Lower end sets one and supports ring, and sets magnet in the interior collar for supporting ring, and spiral shell is directly held with using the magnet Silk head, allows screw to be able to firm being installed on body.
9. tool as claimed in claim 1 takes off the torsion release of inversion structures soon, it is characterised in that foregoing body Lower end sets a magnet, and screw head is directly held with using the magnet, allows screw to be able to firm being installed in On body.
10. tool as claimed in claim 1 takes off the torsion release of inversion structures soon, it is characterised in that foregoing screwdriver head Bar portion be non-circular structure, make foregoing ball supported mutually with the bar portion of the screwdriver head and common clamping Screwdriver head;And the locking part of foregoing bottle opener cephalic par is to coordinate the lock apertured shape of screw and set, and makes screwdriver head It is able to drive screw to rotate.
CN201510999675.6A 2015-12-28 2015-12-28 The torsion release of the fast de- inversion structures of tool Pending CN106914848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510999675.6A CN106914848A (en) 2015-12-28 2015-12-28 The torsion release of the fast de- inversion structures of tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510999675.6A CN106914848A (en) 2015-12-28 2015-12-28 The torsion release of the fast de- inversion structures of tool

Publications (1)

Publication Number Publication Date
CN106914848A true CN106914848A (en) 2017-07-04

Family

ID=59455197

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510999675.6A Pending CN106914848A (en) 2015-12-28 2015-12-28 The torsion release of the fast de- inversion structures of tool

Country Status (1)

Country Link
CN (1) CN106914848A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI253376B (en) * 2005-01-11 2006-04-21 Ho-Tien Chen Clamped structure of screwdriver head
CN1814414A (en) * 2005-02-06 2006-08-09 陈河田 Tool opener head damping structure
CN201098863Y (en) * 2007-09-13 2008-08-13 陈章英 Modified fast-disengaging extension rod structure
CN101386164A (en) * 2007-09-13 2009-03-18 陈河田 Tool starter head torsion releasing and onoff structure
US20110023666A1 (en) * 2009-07-31 2011-02-03 Chung Jaan Industrial Co., Ltd. Fast screwdriver blade connecting structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI253376B (en) * 2005-01-11 2006-04-21 Ho-Tien Chen Clamped structure of screwdriver head
CN1814414A (en) * 2005-02-06 2006-08-09 陈河田 Tool opener head damping structure
CN201098863Y (en) * 2007-09-13 2008-08-13 陈章英 Modified fast-disengaging extension rod structure
CN101386164A (en) * 2007-09-13 2009-03-18 陈河田 Tool starter head torsion releasing and onoff structure
US20110023666A1 (en) * 2009-07-31 2011-02-03 Chung Jaan Industrial Co., Ltd. Fast screwdriver blade connecting structure

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Application publication date: 20170704

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