WO2010024026A1 - Embout de tournevis, vis et leur combinaison - Google Patents

Embout de tournevis, vis et leur combinaison Download PDF

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Publication number
WO2010024026A1
WO2010024026A1 PCT/JP2009/061600 JP2009061600W WO2010024026A1 WO 2010024026 A1 WO2010024026 A1 WO 2010024026A1 JP 2009061600 W JP2009061600 W JP 2009061600W WO 2010024026 A1 WO2010024026 A1 WO 2010024026A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
bit
cross
blade
groove
Prior art date
Application number
PCT/JP2009/061600
Other languages
English (en)
Japanese (ja)
Inventor
勝行 戸津
Original Assignee
Totsu Katsuyuki
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 Totsu Katsuyuki filed Critical Totsu Katsuyuki
Publication of WO2010024026A1 publication Critical patent/WO2010024026A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
    • 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
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section

Definitions

  • the present invention relates to a driver bit that can smoothly achieve a screw tightening operation and can remarkably increase torque transmission efficiency, a screw adapted to the driver bit, and a combination thereof.
  • the inventor of the present invention has an extension blade that extends in a certain inclination with the tip of the blade portion directed toward the center portion thereof, each having a tight coupling of the tip edge portion of the driver bit to the bit fitting groove of the screw.
  • a vertical end wall portion and a side wall portion thereof having a predetermined depth are respectively attached to the end edge portion of the bit fitting groove formed of a cross groove in the screw head portion of the screw.
  • the Phillips screwdriver is designed so that the four blades formed at the tip of the bit rod match the bit insertion grooves such as screws and screws formed according to the standard (JIS standard). Therefore, only one screw or screw with a matching bit insertion groove can be rotated well with a single screwdriver, which is inconvenient, so the insertion depth of the screw or screw into the bit insertion groove can be reduced.
  • This is a plus screwdriver that allows four blades to be surely matched to bit insertion grooves of various sizes just by changing them, and allows multiple screws and screws to be rotated with a single screwdriver.
  • a bit structure has been proposed (see Patent Document 2).
  • the bit structure of a plus driver described in Patent Document 2 is a bit structure of a driver having four blades having a predetermined width and projecting radially from the tip of a bit rod.
  • the tip end side of the surface of the bit rod perpendicular to the bit axis line of the bit rod is configured as a first blade whose distance from the bit axis line becomes smaller toward the tip side, and the base end side corresponds to the tip side.
  • the distance from the bit axis is reduced, and a part of the outer side of the orthogonal surface is formed on the exposed tip surface to be a second blade, the blade width at the base end of these first blades, The blade widths at the tips of the two blades are set so as to be different from each other, and the side edges of the first blade and the second blade are configured to be substantially parallel. Therefore, according to the bit structure of the Phillips screwdriver configured in this way, it can be rotated without rattling with respect to a screw or screw having a bit insertion groove that matches the size of the first blade and the second blade, respectively. It is possible to do.
  • each groove is formed by a part of a common spherical surface as a cross-recessed screw that is particularly suitable for precision screws, which is easy to manufacture, easy to manufacture, and can prevent the driver from coming out.
  • the outer peripheral side end surface of each groove is a cylindrical surface parallel to the screw axis, and the opposite side surfaces that serve as the drive surface are formed in parallel by contacting both side surfaces of the blade of the driver bit that engages with the groove in each groove.
  • the tip surface of each blade is formed by a part of a common spherical surface, the outer peripheral surface of each blade is a cylindrical surface, and both side surfaces of each blade are formed in parallel.
  • the face of the blade receiving the cross-shaped torque does not have an angle with respect to the shaft center, so that it is possible to reliably prevent the driver from coming out.
  • the cross-recessed screw having the above-described configuration requires a cross hole for JIS standard screws or a cross hole for precision screws according to JIS standard (Japan Camera Industry Standard) for dimensional control during manufacture.
  • the bit structure of the plus driver described in Patent Document 2 has an advantage that a plurality of screws, screws, and the like can be rotated by a single screwdriver, but each is different on the tip side of the bit rod. It is necessary to manufacture a blade having a size in accordance with the size of a bit insertion groove such as a screw or a screw, which makes manufacturing difficult and increases manufacturing cost. Further, according to the combination of the cross-recessed screw described in Patent Document 3 and its driver bit, there is an advantage that dimensional management is easy and manufacture is easy, but blade engagement for engaging the blade of the driver bit is possible.
  • each groove bottom surface On both sides of the groove, a first driving surface, which is a vertical wall surface, and a second driving surface opposite to each other are formed in parallel, and each groove bottom surface has a spherical groove center bottom surface as a common portion.
  • the tip of the blade of the driver bit that conforms to the above is also formed by a part of the common spherical surface, so in general, there is a limit to the depth design of the blade engagement groove with precision screws, and the groove bottom is spherical For this reason, the tightness due to the engagement of the tip of the blade of the driver bit with the blade engagement groove of the screw is relatively low, and it is not stable. More likely to occur the bar cam out, there is a drawback not sufficient to do always stable screwing operation.
  • the tip edge of the driver bit can be tightly coupled to the bit fitting groove of the screw, and the rotational driving force, that is, the torque can be transmitted most efficiently when attaching and removing the screw.
  • the tip blade portion In order to obtain a driver bit and screw that can reliably prevent the driver bit from coming out during screw tightening and can be applied effectively to multiple types of screws with different dimensions
  • the tip blade portion has a required depth from the opening of the screw head.
  • the cross-shaped By setting the radial outer peripheral edge of the cruciform blade piece and its inclination angle so as to be joined in a wedge shape at the outer peripheral edge of each opening, it is possible to reliably prevent cam-out during screw tightening operations. It has been found that a screwdriver bit can be obtained that can perform a maximum torque transmission with a minimum driving force with respect to the screw and can always achieve a stable screw fastening operation easily.
  • the screw applied to this can be used effectively not only in the conventional precision screw based on the JCIS standard, but also in the screw tightening operation of the screw based on the JIS standard.
  • the driver bit having the above-described configuration has a taper that reduces the diameter in a stepped shape at the distal end portion of each radially outer peripheral portion of the cross-shaped blade piece formed at a required inclination angle at the distal end blade portion. It was confirmed that each edge portion can be effectively applied to a plurality of types of screws having different dimensions, particularly precision screws having a small dimension.
  • the blade width extending in the radial direction of each of the cruciform blade pieces is formed in a divergent shape toward the outer peripheral edge portion in the radial direction, and the spread angle with each adjacent blade piece Is set to be an acute angle, so that the tip of the screwdriver bit is tightly coupled to the screw bit fitting groove described above, and the rotational driving force, that is, the torque when installing and removing the screw is tight.
  • the rotational driving force that is, the torque when installing and removing the screw is tight.
  • the screw neck at a predetermined inclination angle from the opening of the screw head to the bottom of the required depth based on the JIS standard or the JIS standard.
  • the cruciform groove of the bit fitting groove has a screw head opening at the JIS standard or JIS standard.
  • the size is set slightly larger than the dimension M, and is configured to extend from the opening to the bottom of the required depth toward the center of the screw neck at a predetermined inclination angle. It has been confirmed that it is extremely effective to use screws each formed with a tapered inner peripheral surface portion that reduces to a G-shape according to the JIS standard or JIS standard at the bottom side portion of the peripheral surface portion.
  • an object of the present invention is to provide a tip bit portion of a driver bit with respect to a bit fitting groove of a screw as a tip bit portion of a driver bit that fits into a cross-shaped bit fitting groove formed on a screw head such as a precision screw.
  • a screw head such as a precision screw.
  • a screwdriver bit includes a tip blade portion formed of a cross-shaped blade piece that fits into a cross-shaped bit fitting groove provided on a screw head.
  • the tip blade portion is a screw bit having a cross-shaped groove portion extending toward the center of the screw neck portion at a predetermined inclination angle from the opening portion of the screw head to the bottom portion of the required depth.
  • the radial outer peripheral edge of the cruciform blade piece and the inclination angle thereof are respectively set so as to be coupled in a wedge shape at the outer peripheral edge of each opening of the cruciform groove with respect to the fitting groove.
  • the tip edge portion has a stepped diameter at the tip portion of each radially outer peripheral edge of the cross-shaped blade piece formed at a required inclination angle.
  • a taper edge portion that is reduced in a shape is provided.
  • the blade width extending in the radial direction of each of the cruciform blade pieces is formed in a divergent shape toward the radially outer peripheral edge portion,
  • Each of the adjacent blade pieces and the blade pieces are set so that the spread angle is an acute angle.
  • the screw according to claim 4 of the present invention extends from the opening of the screw head to the bottom of the required depth in the direction of the center of the screw neck at a predetermined inclination angle based on JIS standards and the like.
  • the cross-shaped groove of the bit fitting groove has an opening at a screw head slightly larger than the M dimension according to JIS standards, etc.
  • the JIS standard A taper inner peripheral surface portion that is reduced in a stepped shape to a G dimension by the above method is formed.
  • the groove width formed by the opposite side wall surfaces extending in the radial direction is directed to each inclined inner peripheral surface portion. It is characterized in that it is set in a divergent shape, and the separation angle between the adjacent side wall surfaces and the side wall surfaces of each cruciform groove is set to an acute angle.
  • the combination of the screwdriver bit and the screw according to claim 6 of the present invention is a screwdriver bit having a tip blade portion made of a cross-shaped blade piece fitted into a cross-shaped bit fitting groove provided on a screw head.
  • the tip blade portion is a bit fitting groove of a screw provided with a cross-shaped groove portion extending toward the center of the screw neck portion at a predetermined inclination angle from the opening portion of the screw head to the bottom portion of the required depth.
  • a driver bit formed by setting each radial outer peripheral edge of the cross-shaped blade piece and its inclination angle so as to be coupled in a wedge shape with each opening outer peripheral edge of the cruciform groove
  • a bit fitting groove formed by forming a cross-shaped groove extending from the opening of the screw head to the bottom of the required depth in the direction of the center of the screw neck at a predetermined inclination angle based on JIS standards and the like.
  • the cross-shaped groove of the bit fitting groove has a predetermined inclination angle from the opening to the bottom of the required depth by setting the opening of the screw head to be slightly larger than the dimension M according to JIS standards and the like.
  • the taper is configured to extend toward the center of the screw neck, and at the bottom side portion of each inclined inner peripheral surface portion of the cruciform groove portion, the taper is reduced in a stepped shape to the G dimension according to the JIS standard or the like.
  • the present invention is characterized by combining screws each having an inner peripheral surface portion.
  • the screw bit fitting groove of the screw is used as the tip blade portion of the driver bit fitted into the cross-shaped bit fitting groove formed on the screw head such as a precision screw.
  • the tip of the screwdriver bit can be tightly coupled to the screwdriver, and the rotational drive force, i.e. torque, can be transmitted most efficiently when attaching and removing the screw. It is possible to reliably prevent the occurrence of a cam-out and effectively apply to a plurality of types of screws having different dimensions.
  • the screwdriver bit according to the present invention when the screwdriver bit according to the present invention is connected to the bit fitting groove of the screw, it is in contact with the side wall portion of the bit fitting groove as in the prior art, that is, to the driving surface.
  • a bit like the conventional one is used in the screw tightening operation when mounting the screw. Breakage of the fitting groove and occurrence of cam-out can be reliably prevented, and the conventional screwdriver bit can be used to easily and reliably remove the broken screw of the bit fitting groove. it can.
  • the tip bit portion of the driver bit is closely coupled to the bit fitting groove of each screw, that is, the rattling There can be no stable bond.
  • the tip bit portion of the driver bit is closely coupled to the bit fitting groove of each screw, that is, the rattling There can be no stable bond.
  • it is effective for stabilization at the time of coupling.
  • the tip edge portion of the driver bit can be tightly coupled to the bit fitting groove of the screw, and the rotational driving force when attaching and detaching the screw. That is, torque can be transmitted most efficiently.
  • FIG. 1 and 2 show an embodiment of a driver bit according to the present invention.
  • FIG. 1 is a schematic side view of a tip blade portion
  • FIG. 2 is a schematic plan view of a tip surface of the tip blade portion.
  • reference numeral 10 denotes a driver bit having a tip blade portion made of a cruciform blade piece fitted in a cruciform bit fitting groove provided in the screw head.
  • the tip edge portion 12 of the driver bit 10 is a screw provided with a cross-shaped groove portion extending in the direction of the center of the screw neck portion at a predetermined inclination angle from the opening portion of the screw head to the bottom portion of the required depth.
  • the radially outer peripheral edge portion 14a of the cruciform blade piece 14 and its inclination angle ⁇ (for example, 26) so as to be coupled to the bit fitting groove in a wedge shape at each outer peripheral edge portion of the opening of the cruciform groove portion. ° 0 ') is set for each.
  • the tip edge portion 12 of the driver bit 10 has a tapered edge that reduces the diameter in a step shape at the tip portion of each radially outer peripheral edge portion 14a of the cross-shaped blade piece 14 formed at the inclination angle ⁇ . It can be set as the structure which provided the part 15, respectively. Therefore, the tip blade portion 12 is formed with an extended cross-shaped blade piece 16 composed of the outer peripheral edge portion 16a having the same inclination angle as the inclination angle ⁇ at the tip portion from the tapered edge portion 15. The center of the tip of the tip blade 12 where the blades of the cruciform blade 14 intersect is formed as a required conical protrusion 18.
  • the part shown with a broken line shows the external shape of the front-end
  • the blade width w which each extends in the radial direction of the said cross-shaped blade piece 14 is directed toward the radial direction outer peripheral edge parts 14a and 16a, and is a divergent shape.
  • the spread angle ⁇ ′ between the adjacent blade pieces 14 and 14 is set to be an acute angle.
  • the driver bit 10 in the present embodiment configured as described above is fitted into the bit fitting groove 32 of the existing screw 30 having the required dimensions, the result is as shown in FIGS. That is, in FIG. 3 and FIG. 4, the bit fitting groove 32 of the screw 30 is screw neck with a predetermined inclination angle ⁇ based on the JIS standard or the JIS standard from the opening 33 of the screw head 30a to the bottom of the required depth. A cross-shaped groove 34 extending in the direction of the center of the portion 30b is formed. Therefore, in FIG. 3, the tip blade portion 12 of the driver bit 10 extends in the direction of the center of the screw neck portion 30b from the opening 33 of the screw head portion 30a to the bottom portion of the required depth at a predetermined inclination angle ⁇ .
  • the radially outer peripheral edge portion 14 a of the cross-shaped blade piece 14 is wedged at each opening outer peripheral edge portion 33 a of the cross-shaped groove portion 34. Can be combined.
  • the radially outer peripheral edge portion 14a of the cruciform blade piece 14 fitted in the bit fitting groove 32 of the screw 30 of the tip blade portion 12 of the driver bit 10 is Torque transmission from the driver bit 10 to the screw 30 can be effectively performed by coupling in a wedge shape at each outer peripheral edge portion 33a of the cross-shaped groove portion 34a. Therefore, by such torque transmission, when this type of conventional screw 30 is fitted to the tip edge portion of the driver bit, the cruciform groove portion 34 which has been the driving surface of the bit fitting groove 32 faces each other. It is not necessary for the tip edge 12 of the driver bit 10 to abut the side wall surfaces 34b and 34c in the initial coupling. As described above, when the tip edge portion 12 of the driver bit 10 is closely fitted in the bit fitting groove 32 of the screw 30, torque transmission from the driver bit 10 to the screw 30 is effectively performed, and the screw 30 is smooth. And proper installation and removal work can be achieved reliably.
  • the driver bit 10 for example, when the screw tightening is completed, when the load resistance is increased and a large amount of stress is applied to the tip blade portion 12, and the tip blade portion 12 is twisted. Further, the side surface in the vicinity of the outer peripheral edge portion 14a in the radial direction of the cruciform blade piece 14 abuts on each outer peripheral edge portion 33a of the cross-shaped groove portion 34 of the bit fitting groove 32 and the side wall surface 34c in the vicinity of the inclined inner peripheral surface portion 34a. Thus, torque transmission can be made more effective.
  • the driver bit in the present embodiment is fitted so that torque can be effectively transmitted from the driver bit 10 to the screw even in the bit fitting groove of an existing screw having a relatively small size.
  • the driver bit 10 of this embodiment is used for the bit fitting groove 32 ′ of the existing screw 30 ′ having a small size as compared with the tip blade portion 12 of the driver bit 10.
  • the relatively distal end portion of the cruciform blade piece 14 is fitted into the cruciform groove portion 34 ′ having a required depth from the opening 33 ′ of the screw head 30 a ′.
  • FIG. 4 is a schematic side sectional view of the screw head
  • FIG. 5 is a schematic plan view of the screw head. That is, in FIG. 4, reference numeral 20 extends from the opening of the screw head to the bottom of the required depth in a direction toward the center of the screw neck at a predetermined inclination angle based on the JIS standard or JIS standard. It is a screw provided with a bit fitting groove formed by forming a letter-shaped groove. The cross-shaped groove portion 24 of the bit fitting groove 22 of the screw 20 is set so that the opening portion 23 of the screw head portion 20a is slightly enlarged (M ′) from the M size according to the JIS standard or the JIS standard.
  • M ′ slightly enlarged
  • Each inclined inner peripheral surface portion of the cruciform groove portion 24 is configured to extend toward the center of the screw neck portion 20b at a predetermined inclination angle ⁇ (for example, 26 ° 0 ′) to the bottom portion of a required depth.
  • ⁇ for example, 26 ° 0 ′
  • a taper inner peripheral surface portion 25 that is reduced to a G-shape according to the JIS standard or JIS standard is formed.
  • the cross-shaped groove portion 24 of the bit fitting groove 22 has an extended cross-shaped groove portion 26 formed of an inner peripheral surface portion 26 a having the same inclination angle ⁇ as the inclination angle ⁇ at the tip end portion than the tapered inner peripheral surface portion 25. It is formed.
  • the central portion of the tip end of the bit fitting groove 22 where each groove portion of the cross-shaped groove portion 26 intersects is formed as a required conical bottom portion 28.
  • the part shown with a broken line shows the shape of the bit fitting groove
  • the cross-shaped groove portion 24 of the bit fitting groove 22 has a groove width w ′ formed by the opposing side wall surfaces 24b and 24c extending in the radial direction and extending toward the respective inclined inner peripheral surface portions 24a. It is possible to adopt a configuration in which the spacing angle ⁇ ′ between the adjacent side wall surface 24c and the side wall surface 24b of each cruciform groove 24 is set to an acute angle.
  • FIG. 8 and FIG. 9 the tip blade portion 12 of the driver bit 10 is screw neck with a predetermined inclination angle ⁇ from the opening portion 23 formed in the bit fitting groove 22 of the screw 20 to the bottom portion of the required depth.
  • the cross-shaped groove portion 24 extending toward the center of the portion 20b, the inclined inner peripheral surface portion 24a, the tapered inner peripheral surface portion 25, the extended cross-shaped groove portion 26, the inner peripheral surface portion 26a, and the conical bottom portion 28 are formed.
  • the shapes of the radially outer peripheral edge 14a, the tapered edge 15, the extended cross-shaped blade 16 and the outer peripheral edge 16a and the conical protrusion 18 of the cross-shaped blade 14 of the tip blade 12 are as shown in the figure. And can be fitted so that torque transmission from the driver bit 10 to the screw 20 can be performed appropriately and effectively.
  • the cross shape of the tip blade portion 12 is.
  • the outer peripheral edge portion 14a in the radial direction of the blade piece 14 can be tightly coupled in a wedge shape at each of the outer peripheral edge portions 33a of the cross-shaped groove portion 34 of the bit fitting groove 22 as well as the cross-shaped groove portion. It is possible to set the outer side surfaces of the cross-shaped blade pieces 14 to be in proper contact with the side wall surfaces 24b and 24c extending in the radial direction and facing each other. Thereby, torque transmission from the driver bit 10 to the screw 20 can be performed more effectively.
  • FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a schematic side cross-sectional explanatory drawing of the screw head which shows the state which fitted the front-end
  • FIG. 7 is a schematic side cross-sectional explanatory view of the screw head showing a state in which the tip blade portion of the driver bit shown in FIG. 1 is coupled to the screw shown in FIG. 6.
  • FIG. 9 is a sectional view taken along line BB in FIG.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

Cette invention concerne une combinaison d’embout de tournevis (10) et de vis (20). Dans ledit embout de tournevis (10), les bords périphériques externes (14a) d’une section formant arrête centrale (14) et l’angle d’inclinaison des bords périphériques externes (14a) sont configurés de manière à ce qu’une section formant bord de tête (12) de l’embout de tournevis se cale entre les bords périphériques externes (23a) de l’ouverture d’une section formant rainure transversale d’une rainure de réception d’embout (22) dans la vis. La dimension d’une ouverture (23) dans une tête de vis de ladite vis (20) est configurée de manière à être légèrement supérieure à une dimension (M) conforme à une norme JIS. La section formant rainure transversale de la vis s’étend sur une profondeur prédéterminée et avec un angle d’inclinaison prédéterminé depuis l’ouverture de la section formant rainure transversale, jusqu’au fond de ladite section. Enfin, des surfaces périphériques tronconiques (25) convergeant par paliers, d’une dimension (G) conforme à la norme JIS, sont formées sur des parties du côté inférieur des surfaces périphériques internes inclinées (24a) de la section formant rainure transversale (24).
PCT/JP2009/061600 2008-08-28 2009-06-25 Embout de tournevis, vis et leur combinaison WO2010024026A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-219220 2008-08-28
JP2008219220A JP2010052089A (ja) 2008-08-28 2008-08-28 ドライバービット及びねじ並びにこれらの組合せ

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WO2010024026A1 true WO2010024026A1 (fr) 2010-03-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI701108B (zh) * 2017-03-23 2020-08-11 美商葛利普控股公司 多夾持點套筒起子頭
WO2021230420A1 (fr) * 2020-05-11 2021-11-18 주식회사 볼츠원 Boulon ayant une ouverture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5662860U (fr) * 1979-10-19 1981-05-27
JP2000218556A (ja) * 1999-01-29 2000-08-08 Kaneko Seisakusho:Kk プラスドライバーのビットの製造方法
WO2004065067A1 (fr) * 2003-01-24 2004-08-05 Katsuyuki Totsu Embout de tournevis et association de ce dernier avec une vis

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5662860U (fr) * 1979-10-19 1981-05-27
JP2000218556A (ja) * 1999-01-29 2000-08-08 Kaneko Seisakusho:Kk プラスドライバーのビットの製造方法
WO2004065067A1 (fr) * 2003-01-24 2004-08-05 Katsuyuki Totsu Embout de tournevis et association de ce dernier avec une vis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI701108B (zh) * 2017-03-23 2020-08-11 美商葛利普控股公司 多夾持點套筒起子頭
WO2021230420A1 (fr) * 2020-05-11 2021-11-18 주식회사 볼츠원 Boulon ayant une ouverture

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JP2010052089A (ja) 2010-03-11

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