CN105364768A - Screwdriver of improved structure - Google Patents
Screwdriver of improved structure Download PDFInfo
- Publication number
- CN105364768A CN105364768A CN201510795410.4A CN201510795410A CN105364768A CN 105364768 A CN105364768 A CN 105364768A CN 201510795410 A CN201510795410 A CN 201510795410A CN 105364768 A CN105364768 A CN 105364768A
- Authority
- CN
- China
- Prior art keywords
- screwdriver
- structure improved
- handle portion
- slide block
- batch
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/16—Handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/0007—Connections or joints between tool parts
- B25B23/0042—Connection means between screwdriver handle and screwdriver shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G1/00—Handle constructions
- B25G1/10—Handle constructions characterised by material or shape
- B25G1/105—Handle constructions characterised by material or shape for screwdrivers, wrenches or spanners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G3/00—Attaching handles to the implements
- B25G3/02—Socket, tang, or like fixings
- B25G3/12—Locking and securing devices
- B25G3/16—Locking and securing devices comprising bayonet joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention provides a screwdriver of an improved structure and belongs to the technical field of hardware tools. The problem that an existing screwdriver is not convenient to use is solved through the screwdriver of the improved structure. The screwdriver of the improved structure comprises a main body, a locking device, a screwdriver rod and a handle sleeve, wherein the locking device is arranged on the main body; the screwdriver rod penetrates through the locking device and is inserted in the main body; the screwdriver rod can be locked or loosened through the locking device; the handle sleeve is arranged on the outer surface of the main body in a sleeving mode and made of high-abrasion-resistance thermoplastic polyeher ester elastomer (TPEE). The raw materials of the high-abrasion-resistance TPEE comprise, by weight, 49%-59% of TPEE, 20%-30% of polytetrafluoroethylene (PTFE), 5%-15% of alkali-free glass fibers, 5%-15% of lubricating agents, 0.2%-1.0% of antioxidants, and the balance silicon dioxide. The screwdriver of the improved structure has the advantages of being simple in structure, convenient to dismount and wide in application range.
Description
Technical field
The invention belongs to hardware & tools technical field, relate to a kind of structure improved screwdriver.
Background technology
Screwdriver is that a kind of being used for twists screw with the instrument forcing it in place, usually a thin sphenocephaly is had, in the line of rabbet joint that can insert screw cap or recess, in life, modal screwdriver is exactly the screwdriver that a handle makes together, it easily prepares, just can use as long as take out, but because screw has a variety of different length and rugosity, sometimes the screwdriver preparing a lot of Zhi Butong is needed, use and comparatively bother, cost is higher, the space taken is larger, therefore there is a kind of combination type screwdriver, this screwdriver separates screwdriver bit and handle and is equipped with the screwdriver bit of different model, when dissimilar screw is installed, only need change screwdriver bit just passable, do not need to prepare a large amount of screwdriver, it can save space, easy to use, but easily lose screwdriver bit.
Along with the development of technology, market there is a kind of screwdriver of more simplifying, such as, Authorization Notice No. is the screwdriver handle that the utility model of CN201455888U discloses a kind of tool storage device, comprise the connecting rod be connected successively, handle body and bonnet, connecting rod includes the body of rod, body of rod inside is provided with the spliced eye of hollow, its other end is connected with handle body, handle body is provided with the storage device that can hold clock and watch screwdriver and sleeve for subsequent use, this screwdriver offers some accommodation holes on its handle body, for holding the screwdriver bit of various model, this screwdriver is compared with traditional group mould assembly screwdriver, there is compact conformation, take up room less, and it is portable, advantage easy to use, but also there is following defect: 1 simultaneously, these screwdriver parts are more, dismounting comparatively bothers, use inconvenience, also maintenance and the maintenance of parts is not easy to, 2, overall structure and handle body structure all more complicated, its manufacture craft is also more complicated, and therefore its cost of manufacture is higher.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose the structure improved screwdriver that a kind of structure is simple, convenient disassembly, the scope of application are wide.
Object of the present invention realizes by following technical proposal: a kind of structure improved screwdriver, comprises
Main body;
Locking device, it is arranged in main body;
Criticize bar, it passes locking device and is inserted in main body;
Described locking device can make batch rod locking or loosen;
Taper knob, it is sheathed on body outer surface and adopts high abrasion TPEE thermoplastic polyester elastomer to make, and the raw material composition of described high abrasion TPEE thermoplastic polyester elastomer comprises (wt%): TPEE49-59%; PTFE20-30%; Alkali-free glass fibre 5-15%, lubricant 5-15%; Antioxidant 0.2-1.0%; Surplus is silica.
In the structure improved screwdriver of above-mentioned one, described silica is the mixture comprising silica dioxide granule I and silica dioxide granule II, and wherein silica dioxide granule I is of a size of 5-10 micron, silica dioxide granule II is of a size of 4-8 micron.
In the structure improved screwdriver of above-mentioned one, described silica dioxide granule I is with the mixture of silica dioxide granule II, the content of silica dioxide granule I accounts for the 20-35% of mixture gross mass, and (this existence with the silica dioxide granule of large-size of silica dioxide granule I is to directly tackle relatively large extraneous stress impact, when being subject to extraneous directly impact or larger stress impact, it can by the elastic displacement of the large resistance of bulky grain in elastomer and reset, cushion, thus play the effect once decayed, simultaneously because have larger particle size, the area that is obstructed is larger, thus can form enough decay by less elastic displacement, avoid destructive tearing occurs, certainly same have larger size because of it, addition during production and application needs suitably to control, excessive interpolation is avoided to cause combination in the elastomer firm not, and mixed performance and bulk strength can be affected).In the mixture of silica dioxide granule I, silica dioxide granule II, the content of silica dioxide granule II accounts for the 65-85% of mixture gross mass, and (this material of silica dioxide granule III has less particle size, it very easily occurs when using to pile up or caking, and in overall structure skewness, thus affect overall performance and the quality of material).The particle of two kinds of sizes can form grating system, play good humidification, when making stressed impact simultaneously, large-size particle can also be collided while mutually colliding between granule, repeatedly decay, thus play good damping of shocks effect, improve shock resistance and crocking resistance.
In the structure improved screwdriver of above-mentioned one, described silica is that the consumption of coupling agent is the 1-3% of silica gross mass also through the surface preparation of coupling agent.In prior art, the conventional amount used of coupling agent is generally 0.5 ~ 2% of filler loading, only need to reach fully to infiltrate filler, and mostly consumption is to propose for the silica of loose structure compared with conventional amount used, in order to improve, the silica dioxide granule of loose structure is processed comparatively fully, here to carry out categorizedly the surface preparation of the silica dioxide granule of two types in technical scheme, wherein silica dioxide granule II adopts general infiltration that particle surface is infiltrated, it is only used to the compatibility improving this two classes material and elastomeric entirety, and silica dioxide granule I is needed to carry out deep layer infiltration (pressurization can be adopted to infiltrate or atmospheric steam is fumigated or high steam such as to fumigate at the energy to improve coupling agent molecule, overcome surface tension, thus realize carrying out infiltration process to the internal surface of hole of porous), be conducive in production and processing forming process, in elastomer access aperture, carry out to make porous and elastomer contacting bonding fully comprehensively, thus improve mechanical performance and the anti-wear performance of arrangement significantly.
In the structure improved screwdriver of above-mentioned one, described alkali-free glass fibre is preferably alkali-free glass fibre, and the length of short glass fiber is 1-3mm, and diameter is 5-10 μm.Alkali-free glass fiber diameter is thinner in theory, and length is longer, strengthens effect better, but when reaching a certain critical point, strengthens effect and do not increase counter subtracting.If glass diameter is too thin, is easily cut into fine-powder, thus loses the humidification of glass.If glass diameter is too thick, just poor with the cementability of TPEE and PTFE, reduce the mechanical property of product.Therefore, the length of alkali-free glass fiber and diameter control in above-mentioned scope, not only can be ensured the enhancing effect of alkali-free glass fiber, also can improve the compatibility between fiber and TPEE and PTFE by the present invention.
In above-mentioned a kind of multifunctional screw driver, described locking device comprises batch bar cover, installation sleeve and slide block, described batch of bar cover is sheathed on to criticize on bar and criticize bar cover and is inserted in handle portion, described installation sleeve is sheathed on the outer and installation sleeve of batch bar cover between handle portion and batch bar cover, installation sleeve is provided with buckle, handle portion offers the buckle slot corresponding with buckle, described buckle is positioned at buckle slot, installation sleeve offers chute, and described slide block is arranged in chute.
In above-mentioned a kind of multifunctional screw driver, batch bar cover is provided with the contiguous block with shoe contact, described contiguous block comprises connected horizontal part and rake, described horizontal position in the below of slide block and the front end of slide block can be resisted against on rake, when slide block is on rake, batch bar cover transfixion, when slide block and rake away from time, batch bar cover can freely activity.
In above-mentioned a kind of multifunctional screw driver, described slide block comprises tight lock part and sliding part, and described tight lock part is resisted against on rake, and described sliding position is in chute and sliding part can drive tight lock part along chute slippage.
In above-mentioned a kind of multifunctional screw driver, handle portion is provided with sheath, one end of described sheath is resisted against in handle portion, and the other end of sheath is resisted against batch bar and puts.
In above-mentioned a kind of multifunctional screw driver, handle portion is provided with elastic component, the two ends of described elastic component are resisted against on handle portion and tight lock part respectively.
Compared with prior art, the present invention includes main body, main body comprises connected handle portion and rotation section, and rotation section comprises batch bar and locking device, and locking device is arranged at the front end of handle portion, and overall structure is simple, easily manufactured, low cost of manufacture; Criticize bar pass locking device and be inserted in main body, locking device can make batch rod locking or loosen simultaneously, facilitates the handling of batch bar, improves installation effectiveness.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is sectional view of the present invention.
Fig. 3 is the structural representation of batch bar cover in a preferred embodiment of the present invention.
Fig. 4 is the structural representation of installation sleeve in a preferred embodiment of the present invention.
Fig. 5 is the structural representation of slide block in a preferred embodiment of the present invention.
In figure, 100, handle portion; 110, sheath; 200, taper knob; 300, bar is criticized; 400, bar cover is criticized; 410, contiguous block; 500, installation sleeve; 501, buckle; 510, slide block; 511, chute; 512, tight lock part; 513, sliding part; 600, elastic component.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figures 1 to 5, this multifunctional screw driver comprises main body, described main body comprises connected handle portion 100 and rotation section, described rotation section comprises batch bar 300 and locking device, described locking device is arranged at the front end of handle portion 100, described batch of bar 300 passes locking device and is inserted in main body, and locking device can make batch bar 300 lock or loosen.
Above-mentioned locking device comprises batch bar cover 400, installation sleeve 500 and slide block 510, batch bar cover 400 offers counterbore, make batch one end conducting of bar cover 400, the one end of criticizing bar cover 400 is closed, the above-mentioned batch of bar 300 is installed in counterbore and batch bar 300 is resisted against on counterbore, and criticizing bar 300 can carry out adaptability replacing simultaneously according to actual needs, makes single screwdriver to be suitable for the different scope of application, expand the scope of application of screwdriver, improve the service efficiency of screwdriver.
Above-mentioned batch of bar cover 400 is inserted on rotation section, the shape criticizing the rear end of bar cover 400 is regular hexagon, rotation section offers and overlaps 400 the first corresponding connecting holes with batch bar, criticizing bar cover 400 is inserted in the first connecting hole, make in the process used at screwdriver, criticizing bar cover 400 can not occur circumferential mobile, improve the service efficiency of screwdriver, spring is provided with in the first connecting hole, one end of spring is resisted against on rotation section, the other end of spring is resisted against on batch bar cover 400, make screwdriver in use turnbuckle can obtain suitable buffering.
Preferably, it is orthohexagonal buckle 501 groove that rotation section offers shape, buckle 501 groove and the first connecting portion are coaxially arranged, and the diameter of buckle 501 groove is greater than the diameter of the first connecting hole, buckle 501 is provided with in buckle 501 groove, buckle 501 has the side laying respectively at buckle 501 left and right sides and the installed surface being positioned at buckle 501 top, be provided with buckle 501 on opposite sides, rotation section offers buckle 501 groove that arrange corresponding to buckle 501, buckle 501 is with in buckle 501 groove, buckle 501 is firmly arranged on connecting portion, ensure that the normal work of screwdriver, installed surface offers the chute 511 running through installed surface, slide block 510 is provided with and slide block 510 can along chute 511 axial slip at slide block 510, thus make batch bar cover 400 locking or loosen, facilitate the handling of batch bar 300, improve the service efficiency of screwdriver.
Further, batch bar cover 400 is provided with contiguous block 410, contiguous block 410 comprises connected horizontal part and rake, horizontal position is in the below of slide block 510, when above-mentioned slide block 510 can be resisted against rake, slide block 510 can limit batch bar cover 400 slippages in the axial direction, improves the stability that batch bar 300 is installed, there is skew and affect the generation of the normal work phenomenon of screwdriver in the position avoiding batch bar 300, improves the operating efficiency of screwdriver; When slide block 510 skids off rake, batch bar 300 can slippage in the axial direction, facilitates the handling of batch bar 300, improves the installation effectiveness of batch bar 300.
Above-mentioned slide block 510 comprises connected tight lock part 512 and sliding part 513, and sliding part 513 is installed on tight lock part 512, when the lower end of tight lock part 512 is contacted with rake, tight lock part 512 can to the active force of rake generation perpendicular to inclined plane, the rear end of simultaneously criticizing bar cover 400 is resisted against in handle portion 100, thus make batch bar overlap 400 transfixions, ensure that the normal work of screwdriver, operator can drive sliding part 513 slippage make tight lock part 512 and sliding part 513 synchronization-sliding in the axial direction, when tight lock part 512 slides along rake and slides onto above rake, batch bar cover 400 can free slippage in the axial direction, facilitate the installation of batch bar 300.
Handle portion 100 is provided with sheath 110, batch bar cover 400 is provided with annular installation portion, one end of sheath 110 is resisted against in handle portion 100, the other end of sheath 110 is resisted against on annular installation portion, the setting of sheath 110 ensure that the spacing of annular installation portion and handle portion 100, avoid screwdriver bit cover and in axial direction think interior slippage, make rake and slide block 510 depart from and have impact on the generation of the normal work phenomenon of screwdriver, ensure that screwdriver normally works.
Handle portion 100 is provided with elastic component 600, the two ends of elastic component 600 are resisted against on handle portion 100 and tight lock part 512 respectively, elastic component 600 be arranged so that slide block 510 can be resisted against rake in an initial condition, simultaneously can stir slide block 510 operator and make slide block 510 return back to initial position after completing the replacing operation of screw rod, facilitate the use of screwdriver, improve the service efficiency of screwdriver.
The outer surface of handle portion 100 is provided with taper knob 200, makes in use to improve the frictional force between operator and handle portion 100, avoid screwdriver and occur skidding, improve the service efficiency of screwdriver.
Also slip lid is provided with at the end of handle portion 100, handle portion 100 is provided with slip ring, slip lid offer in chute 511 corresponding to slip ring, slip ring is positioned at chute 511, slip lid can be rotated in circumferential direction, in use, thus operator by one hold slip lid make screw rod aim at screw, the continuous circumferential turning handle portion 100 of another hand energy of operator simultaneously, thus complete screwdriver and tighten or unload and loosen the screw a little, avoid the position that operator needs to repeat adjustment two hands, facilitate the use of screwdriver, improve the service efficiency of screwdriver.
Preferably, above-mentioned taper knob adopts high abrasion TPEE thermoplastic polyester elastomer to make, and the raw material composition of described high abrasion TPEE thermoplastic polyester elastomer comprises (wt%): TPEE49-59%; PTFE20-30%; Alkali-free glass fibre 5-15%, lubricant 5-15%; Antioxidant 0.2-1.0%; Surplus is silica.
Embodiment 1
In the present embodiment, the raw material composition of the high abrasion TPEE thermoplastic polyester elastomer in door handle sleeve comprises (wt%): TPEE49%; PTFE22%; Glass fibre 6%; Lubricant 6%; Antioxidant 0.3%; Silica is surplus.
Embodiment 2
In the present embodiment, the raw material composition of high abrasion TPEE thermoplastic polyester elastomer comprises (wt%): TPEE52%; PTFE25%; Glass fibre 8%; Lubricant 8%; Antioxidant 0.5%; Antioxidant 0.4%; Silica is surplus.
Embodiment 3
In the present embodiment, the raw material composition of high abrasion TPEE thermoplastic polyester elastomer comprises (wt%): TPEE55%; PTFE27%; Glass fibre 10%; Lubricant 10%; Antioxidant 0.7%; Antioxidant 0.6%; Silica is surplus.
Embodiment 4
In the present embodiment, the raw material composition of high abrasion TPEE thermoplastic polyester elastomer comprises (wt%): TPEE57%; PTFE29%; Glass fibre 13%; Lubricant 13%; Antioxidant 0.2%; Silica is surplus.
Embodiment 5
In the present embodiment, the raw material composition of high abrasion TPEE thermoplastic polyester elastomer comprises (wt%): TPEE59%; PTFE30%; Glass fibre 15%; Lubricant 15%; Antioxidant 0.2%; Antioxidant 0.2%; Silica is surplus.
Above embodiment 1-5 carries out wear test, test condition: equipment Amsler vibraphone machine; 1. mill: ψ 122mm (ψ 0.4ft), rotating speed: 185r/min, hardness: 58-60HRC, surface roughness: Ra=0.4 μm; 2. couple time consuming: 2h; 3. load: 30kg; 4. specimen size: 6mm*7mm*30mm.Comparative example is under equal conditions tested.
The technical scope midrange non-limit part that this place embodiment is protected application claims and in embodiment technical scheme to the new technical scheme that the equal replacement of single or multiple technical characteristic is formed, equally all in the scope of protection of present invention; Simultaneously in all embodiments enumerated or do not enumerate of the present invention program, parameters in the same embodiment only represents an example (i.e. a kind of feasible scheme) of its technical scheme, and between parameters, there is not strict cooperation and qualified relation, wherein each parameter can be replaced, except special declaration mutually when stating ask without prejudice to axiom and the present invention.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (10)
1. a structure improved screwdriver, is characterized in that, comprises
Main body;
Locking device, it is arranged in main body;
Criticize bar, it passes locking device and is inserted in main body;
Described locking device can make batch rod locking or loosen;
Taper knob, it is sheathed on body outer surface and adopts high abrasion TPEE thermoplastic polyester elastomer to make, and the raw material composition of described high abrasion TPEE thermoplastic polyester elastomer comprises (wt%): TPEE49-59%; PTFE20-30%; Alkali-free glass fibre 5-15%, lubricant 5-15%; Antioxidant 0.2-1.0%; Surplus is silica.
2. the structure improved screwdriver of one according to claim 1, it is characterized in that, described silica is the mixture comprising silica dioxide granule I and silica dioxide granule II, and wherein silica dioxide granule I is of a size of 5-10 micron, silica dioxide granule II is of a size of 4-8 micron.
3. the structure improved screwdriver of one according to claim 2, is characterized in that, described silica dioxide granule I is with the mixture of silica dioxide granule II, and the content of silica dioxide granule I accounts for the 20-35% of mixture gross mass.
4. the structure improved screwdriver of one according to claim 3, is characterized in that, described silica is that the consumption of coupling agent is the 1-3% of silica gross mass also through the surface preparation of coupling agent.
5. the structure improved screwdriver of one according to claim 4, is characterized in that, described alkali-free glass fibre is preferably alkali-free glass fibre, and the length of short glass fiber is 1-3mm, and diameter is 5-10 μm.
6. the structure improved screwdriver of one according to claim 1, it is characterized in that, described locking device comprises batch bar cover, installation sleeve and slide block, described batch of bar cover is sheathed on to criticize on bar and criticize bar cover and is inserted in handle portion, described installation sleeve is sheathed on the outer and installation sleeve of batch bar cover between handle portion and batch bar cover, installation sleeve is provided with buckle, handle portion offers the buckle slot corresponding with buckle, described buckle is positioned at buckle slot, installation sleeve offers chute, and described slide block is arranged in chute.
7. the structure improved screwdriver of one according to claim 6, it is characterized in that, batch bar cover is provided with the contiguous block with shoe contact, described contiguous block comprises connected horizontal part and rake, described horizontal position in the below of slide block and the front end of slide block can be resisted against on rake, when slide block is on rake, batch bar cover transfixion, when slide block and rake away from time, batch bar cover can be freely movable.
8. the structure improved screwdriver of the one according to claim 6 or 7, it is characterized in that, described slide block comprises tight lock part and sliding part, and described tight lock part is resisted against on rake, and described sliding position is in chute and sliding part can drive tight lock part along chute slippage.
9. the structure improved screwdriver of one according to claim 8, is characterized in that, handle portion is provided with sheath, and one end of described sheath is resisted against in handle portion, and the other end of sheath is resisted against batch bar and puts.
10. the structure improved screwdriver of one according to claim 9, is characterized in that, handle portion is provided with elastic component, and the two ends of described elastic component are resisted against on handle portion and tight lock part respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510795410.4A CN105364768A (en) | 2015-11-18 | 2015-11-18 | Screwdriver of improved structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510795410.4A CN105364768A (en) | 2015-11-18 | 2015-11-18 | Screwdriver of improved structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105364768A true CN105364768A (en) | 2016-03-02 |
Family
ID=55367650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510795410.4A Pending CN105364768A (en) | 2015-11-18 | 2015-11-18 | Screwdriver of improved structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105364768A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019046991A1 (en) * | 2017-09-05 | 2019-03-14 | 慈溪市诚佳五金工具有限公司 | Screwdriver |
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| CN203650379U (en) * | 2013-12-20 | 2014-06-18 | 慈溪市诚佳五金工具有限公司 | Screwdriver |
| CN203936847U (en) * | 2014-05-04 | 2014-11-12 | 宁波市鄞州永佳电机工具有限公司 | A kind of screwdriver |
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| CN1675032A (en) * | 2002-07-25 | 2005-09-28 | 沃拉·沃克·赫尔曼·沃纳两合公司 | Screwdriver with removable rod |
| DE202004009753U1 (en) * | 2004-06-21 | 2004-11-04 | Hsien, Chih-Ching, Feng Yuan | Socket for screw driver head with quick release has screw driver head in lower retainer aperture and quick release device with ejector bar and spring in upper retainer aperture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019046991A1 (en) * | 2017-09-05 | 2019-03-14 | 慈溪市诚佳五金工具有限公司 | Screwdriver |
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Application publication date: 20160302 |