EP4166278A1 - Screwdriver - Google Patents
Screwdriver Download PDFInfo
- Publication number
- EP4166278A1 EP4166278A1 EP21202910.2A EP21202910A EP4166278A1 EP 4166278 A1 EP4166278 A1 EP 4166278A1 EP 21202910 A EP21202910 A EP 21202910A EP 4166278 A1 EP4166278 A1 EP 4166278A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- sleeve member
- screw head
- screwdriver
- unit
- 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.)
- Withdrawn
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 45
- 230000004308 accommodation Effects 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 16
- 239000000843 powder Substances 0.000 description 16
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
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
- 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
-
- 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
- B25B23/02—Arrangements for handling screws or nuts
- B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
- B25B23/12—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using magnetic means
Definitions
- This invention relates to a driving tool and relates particularly to a screwdriver.
- a magnetic screwdriver 1 is disclosed in a China Patent No. CN205043687U
- the conventional magnetic screwdriver 1 comprises a tool unit 11, an extending unit 12 formed on the tool unit 11, a sleeve unit 13 sleevedly disposed on the tool unit 11, a magnetic unit 14 disposed on an end of the sleeve unit 13, and an engagement unit 15 disposed on another end of the sleeve unit 13.
- the tool unit 11 has a first section 111, a second section 112 opposite to the first section 111, and a third section 113 connected between the first section 111 and the second section 112.
- the extending unit 12 is integrated with the tool unit 11 and located between the second section 112 and the third section 113.
- the sleeve unit 13 has a body 130, a through hole 131 located in the middle of the body 130 and penetrating through the body 130, a bottom groove 132 formed on an end of the body 130, and a top groove 133 formed on another end of the body 130.
- a diameter 131A of the through hole 131 is larger than a maximum diameter 12A of the extending unit 12.
- the magnetic unit 14 is disposed in the bottom groove 132 of the sleeve unit 13.
- the engagement unit 15 is disposed in the top groove 133 of the sleeve unit 13.
- the sleeve unit 13 When the sleeve unit 13 sleeves on the tool unit 11, the sleeve unit 13 is restricted by the engagement unit 15 and the extending unit 12 to move within the third section 113.
- the extending unit 12 helps prevent the sleeve unit 13 from moving to the second section 112.
- a distance B1 defined between the magnetic unit 14 and the screw head 2 is smaller than a distance B2 defined between the magnetic unit 14 and the extending unit 12.
- the magnetic unit 14 then attracts the screw head 2 through the magnetic force to cause the sleeve unit 13 to move toward the second section 112 along the third section 113 but being restricted by the extending unit 12 whereby the magnetic unit 14 contacts the screw head 2 and drives the screw head 2 to execute a screwing operation.
- the sleeve unit 13 then moves toward the first section 111 along the third section 113.
- the conventional magnetic screwdriver 1 still has deficiencies as follows:
- the object of this invention is to provide a screwdriver capable of supporting a screw head stably and facilitating a screwing operation of the screw head to be smooth, speedy, and steady.
- the screwdriver comprises a first section, a second section connected to the first section, a sleeve member detachably disposed on an outer periphery of the second section, and an engagement member disposed in the sleeve member.
- a positioning groove is annularly formed on the outer periphery of the second section.
- the sleeve member has a body defining a top end and a bottom end, a through hole formed through the body for defining an inner peripheral wall between the top end and the bottom end, a magnetic unit disposed in the through hole and located opposite to the top end, and an accommodation groove recessed into the inner peripheral wall and formed opposite to the bottom end.
- the engagement member is disposed in the accommodation groove.
- the accommodation groove and the positioning groove meet each other so as to engage the engagement member with the positioning groove and achieve a firm engagement between the sleeve member and the second section.
- a gap is formed between a top surface of a screw head and the bottom end of the sleeve member when the second section is positioned properly in a socket of the screw head.
- the sleeve member can be separated from the second section and engaged with another second section provided with different types to thereby increase the convenience of use and practicality. Further, metal chips or powders generated during the screwing operation can be cleaned easily and quickly by removing the sleeve member from the second section and cleaning the metal chips or powders thereafter whereby the magnetic effect of the sleeve member is improved and the service life of the sleeve member is prolonged.
- a cover unit extends outwards from the bottom end of the sleeve member.
- the cover unit defines a room communicating with the through hole.
- the cover unit includes a lower end and an upper end.
- the upper end is connected to the bottom end of the sleeve member.
- An inner diameter of the lower end is larger than an inner diameter of the upper end.
- the room of the cover unit defines a maximum diameter larger than a diameter of the through hole of the sleeve member.
- the gap ranges from 2 mm to 3 mm.
- the second section is formed into a cruciform type, a square type, or a hexalobular type.
- the sleeve member is positioned in the middle of the second section when the accommodation groove and the positioning groove meet each other.
- a first preferred embodiment of a screwdriver 4 is disclosed.
- the screwdriver 4 is driven by a driving tool (not shown) and adapted to engage with a socket 51 of a screw head 5 in order to drive the screw head 5 to execute a screwing operation.
- the screwdriver 4 in this preferred embodiment comprises a first section 41 adapted to engage with the driving tool, a second section 42 connected to the first section 41 and adapted to engage with the socket 51 of the screw head 5, a sleeve member 43 sleevedly disposed on an outer periphery of the second section 42 and capable of being separated from the second section 42, and an engagement member 44 disposed in the sleeve member 43 and adapted to fix the sleeve member 43 to the second section 42.
- a positioning groove 421 is annularly recessed into the outer periphery of the second section 42.
- a type of the second section 42 is corresponding to a type of the socket 51 of the screw head 5.
- the type of the second section 42 is formed into a cruciform type, a square type, a hexalobular type or other polygonal types.
- the second section 42 is a hexalobular type which is commonly known as a Torx type.
- the sleeve member 43 has a body 431 defining a top end 431A and a bottom end 431B, a through hole 432 penetrating through the body 431 for defining an inner peripheral wall 431C between the top end 431A and the bottom end 431B, a magnetic unit 433 disposed in the through hole 432 and located opposite to the top end 431A, and an accommodation groove 434 recessed into the inner peripheral wall 431C and formed opposite to the bottom end 431B.
- the engagement member 44 is disposed in the accommodation groove 434.
- the accommodation groove 434 and the positioning groove 421 are located in correspondence and aligned with each other to thereby restrict the engagement member 44 between the accommodation groove 434 and the positioning groove 421 and position the sleeve member 43 in the middle of the second section 42.
- a firm engagement between the sleeve member 43 and the second section 42 is achieved.
- an installation of the screwdriver 4 is executed by inserting the second section 42 through the through hole 432 of the sleeve member 43 until the accommodation groove 434 and the positioning groove 421 face each other to thereby engage the engagement member 44 with the positioning groove 421.
- the sleeve member 43 is positioned in the middle of the second section 42.
- the second section 42 is inserted into the socket 51 of the screw head 5 to form the gap D between the bottom end 431B of the sleeve member 43 and the top surface 52 of the screw head 5, so the magnetic unit 433 attracts the screw head 5 though the magnetic force without being in contact with the screw head 5 whereby the screw head 5 is positioned stably and properly.
- the magnetic attraction between the magnetic unit 433 and the screw head 5 can help guide and straighten the screw head 5.
- a rotational force is applied on the screwdriver 4 to further rotate the screw head 5 into an object 6 quickly and stably until the screw head 5 enters into the object 6 entirely to achieve a tight engagement between the screw head 5 and the object 6.
- the second section 42 of the screwdriver 4 is removed from the socket 51 of the screw head 5 whereby the screwing operation of the screw head 5 is completed.
- the sleeve member 43 After the sleeve member 43 is properly engaged with the second section 42, the sleeve member 43 is positioned in the middle of the second section 42 stably. Hence, the bottom end 431B of the sleeve member 43 is spaced apart from the top surface 52 of the screw head 5 to form the gap D after the second section 42 is inserted into the socket 51 of the screw head 5.
- the gap D helps prevent metal chips or powders caused during the screwing operation from adhering to the magnetic unit 433 while the magnetic attraction is still maintained. Meanwhile, the gap D also prevents the top surface 52 of the screw head 5 from being rubbed unduly by the sleeve member 43.
- the metal chips or powders can be cleaned easily by detaching the sleeve member 43 from the second section 42 as shown in Fig. 5 .
- the second section 42 is inserted into the sleeve member 43 through the through hole 432 until the engagement member 44 is engaged with the positioning groove 421 whereby the sleeve member 43 is properly engaged with the second section 42 and the screwdriver 4 can be used again.
- FIG. 6 shows the object 6 is provided with a pre-drilled opening 61.
- the screwdriver 4 can drive the screw head 5 to screw into the opening 61 of the object 6 without being hindered by the sleeve member 43. Because the sleeve member 43 is not in contact with the top surface 52 of the screw head 5 to form the gap D when the second section 42 is inserted into the socket 51 of the screw head 5, the sleeve member 43 will not contact and press the object 6 to further allow the second section 42 to screw the screw head 5 deeply into the opening 61. Meanwhile, the screwing operation of the screw head 5 can be completed in one time and no additional tool is required.
- the opening 61 will not be damaged by the screwdriver 4.
- the screwing operation of the screw head 5 can be executed smoothly to thereby attain the speedy and steady screwing effect.
- the sleeve member 43 can be separated from the second section 42 and detachably disposed on another second section 42 having the type in correspondence with the socket 51 of the screw head 5.
- the user's burden is lightened by bringing only one sleeve member 43 and different second sections 42.
- the second section 42 can be still kept to be used with other sleeve member 43.
- the sleeve member 43 can be kept to be used with other second section 42 to thereby reduce the cost and increase the convenience of use.
- FIG. 7 and Fig. 8 show a second preferred embodiment of the screwdriver 4 of this invention.
- the correlated elements and the concatenation of elements, the operation and objectives of the second preferred embodiment are the same as those of the first preferred embodiment.
- This embodiment is characterized in that a cover unit 435 extends outwards from the bottom end 431B of the sleeve member 43 and defines a room 435C communicating with the through hole 432.
- the cover unit 435 has a lower end 435A and an upper end 435B.
- the upper end 435B is connected to the bottom end 431B of the sleeve member 43.
- An inner diameter R1 of the lower end 435A is larger than an inner diameter R2 of the upper end 435B.
- the inner diameter R1 of the lower end 435A is also larger than a diameter R3 of the through hole 432 of the sleeve member 43.
- the inner diameter R1 as for instance shown in Fig. 7 , can be deemed to be a maximum diameter of the room 435C of the cover unit 435.
- the lower end 435A of the cover unit 435 and an end surface 422 of the second section 42 are aligned horizontally when the sleeve member 43 is positioned properly on the second section 42. In other words, the lower end 435A of the cover unit 435 and the end surface 422 of the second section 42 are located at the same horizontal line L when the sleeve member 43 is properly engaged with the second section 42.
- the lower end 435A will not contact the top surface 52 of the screw head 5 but surround the screw head 5 to thereby retain the metal chips or powders within the room 435C of the cover unit 435 and prevent the metal chips or powders from spurting or hurting the user during the screwing operation.
- the magnetic unit 433 can still attract the screw head 5 without contacting the screw head 5.
- the metal chips or powders remained in the through hole 432 and the room 435C of the cover unit 435 can be cleaned easily by removing the sleeve member 43 from the second section 42 and cleaning the through hole 432 and the room 435C thereafter as shown in Fig. 9 to thereby improve the magnetic effect of the sleeve member 43 and improve the smoothness and the screwing effect of the screwing operation effectively.
- the screwdriver of this invention takes advantages that the engagement member is engaged with the positioning groove of the second section to position the sleeve member on the second section properly.
- the bottom end of the sleeve member is spaced apart from the top surface of the screw head to form the gap whereby the magnetic unit can attract the screw head without being in contact with the screw head.
- the sleeve member can position and guide the screw head through the magnetic attraction to thereby accelerate the screwing operation of the screw head and attain the stable screwing effect.
- the metal chips or powders caused during the screwing operation can be cleaned easily by detaching the sleeve member from the second section and cleaning the through hole thereafter to thereby improve the magnetic effect of the sleeve member and extend the service life of the sleeve member.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
A screwdriver (4) includes a first section (41), a second section (42) where a positioning groove (421) is annularly formed, a sleeve member (43) detachably disposed on the second section (42), and an engagement member (44) disposed in the sleeve member (43) . The sleeve member (43) has a body (431) with a through hole (432), a magnetic unit (433) disposed in the through hole (432), and an accommodation groove (434) adapted to accommodate the engagement member (44) . When the second section (42) and the sleeve member (43) engage in position, the accommodation groove (434) and the positioning groove (421) meet to engage the engagement member (44) with the positioning groove (421) . The engagement between the second section (42) and the sleeve member (43) allows a gap (D) to be formed between a screw head (5) and the sleeve member (43) while inserting the second section (42) into a socket (51) of the screw head (5), so the magnetic attraction exists without the contact between the sleeve member (43) and the screw head (5) for a firm engagement therebetween.
Description
- This invention relates to a driving tool and relates particularly to a screwdriver.
- Referring to
Fig. 1 andFig. 2 , amagnetic screwdriver 1 is disclosed in a China Patent No.CN205043687U , the conventionalmagnetic screwdriver 1 comprises atool unit 11, an extendingunit 12 formed on thetool unit 11, asleeve unit 13 sleevedly disposed on thetool unit 11, amagnetic unit 14 disposed on an end of thesleeve unit 13, and anengagement unit 15 disposed on another end of thesleeve unit 13. Thetool unit 11 has afirst section 111, asecond section 112 opposite to thefirst section 111, and athird section 113 connected between thefirst section 111 and thesecond section 112. The extendingunit 12 is integrated with thetool unit 11 and located between thesecond section 112 and thethird section 113. Thesleeve unit 13 has abody 130, a throughhole 131 located in the middle of thebody 130 and penetrating through thebody 130, abottom groove 132 formed on an end of thebody 130, and atop groove 133 formed on another end of thebody 130. Adiameter 131A of thethrough hole 131 is larger than amaximum diameter 12A of the extendingunit 12. Themagnetic unit 14 is disposed in thebottom groove 132 of thesleeve unit 13. Theengagement unit 15 is disposed in thetop groove 133 of thesleeve unit 13. When thesleeve unit 13 sleeves on thetool unit 11, thesleeve unit 13 is restricted by theengagement unit 15 and the extendingunit 12 to move within thethird section 113. The extendingunit 12 helps prevent thesleeve unit 13 from moving to thesecond section 112. When thesecond section 112 of thetool unit 11 is inserted into asocket 21 of ascrew head 2, a distance B1 defined between themagnetic unit 14 and thescrew head 2 is smaller than a distance B2 defined between themagnetic unit 14 and the extendingunit 12. Themagnetic unit 14 then attracts thescrew head 2 through the magnetic force to cause thesleeve unit 13 to move toward thesecond section 112 along thethird section 113 but being restricted by the extendingunit 12 whereby themagnetic unit 14 contacts thescrew head 2 and drives thescrew head 2 to execute a screwing operation. When thescrew head 2 is removed from thesecond section 112 of thetool unit 11, thesleeve unit 13 then moves toward thefirst section 111 along thethird section 113. - However, the conventional
magnetic screwdriver 1 still has deficiencies as follows: - 1. The
magnetic unit 14 is in contact with thescrew head 2 directly when thesecond section 112 is positioned in thesocket 21 of thescrew head 2. Thus, metal chips or powders of thescrew head 2 caused during the screwing operation will adhere to themagnetic unit 14 easily, and that will reduce the magnetic force of themagnetic unit 14. Although most of the metal chips or powders can be cleaned by other tools, it is difficult to remove all metal chips or powders. Accordingly, the magnetic attraction between themagnetic unit 14 and thescrew head 2 is affected and themagnetic unit 14 cannot guide thescrew head 2 effectively. The screwing operation then cannot be executed smoothly. - 2. The
sleeve unit 13 cannot be detached from thetool unit 11. Thesleeve unit 13 can only slide within thethird section 113 but cannot be separated from thetool portion 11. When themagnetic unit 14 attracts and releases thescrew head 2 to allow thesleeve unit 13 to slide along thethird section 113, the metal chips or powders will enter and accumulate between the throughhole 131 and thethird section 113, and that causes the metal chips or powders to be cleaned away difficultly since thesleeve unit 13 cannot be separated from thetool unit 11. Further, accumulated metal chips or powders will hinder thesleeve unit 13 from sliding. Accordingly, themagnetic unit 14 cannot attract and guide thescrew head 2 and the screwing operation is affected. - 3. Only if a type of the
second section 112 is corresponding to a type of thesocket 21 of thescrew head 2 can thesecond section 112 be introduced into thesocket 2 to further drive thescrew head 2. However, thesleeve unit 13 cannot be removed from thetool unit 11. Severalmagnetic screwdrivers 1 should be prepared in order to execute a screwing operation ofscrew heads 2 withdifferent sockets 21, and that will burden the user to bring many heavymagnetic screwdrivers 1. If once thesecond section 112 of thetool unit 11 is damaged after a long-term use or the magnetic force of themagnetic unit 14 is reduced, themagnetic screwdriver 1 can only be abandoned. Thus, the cost is increased, and that requires to be improved. - The object of this invention is to provide a screwdriver capable of supporting a screw head stably and facilitating a screwing operation of the screw head to be smooth, speedy, and steady.
- The screwdriver comprises a first section, a second section connected to the first section, a sleeve member detachably disposed on an outer periphery of the second section, and an engagement member disposed in the sleeve member. A positioning groove is annularly formed on the outer periphery of the second section. The sleeve member has a body defining a top end and a bottom end, a through hole formed through the body for defining an inner peripheral wall between the top end and the bottom end, a magnetic unit disposed in the through hole and located opposite to the top end, and an accommodation groove recessed into the inner peripheral wall and formed opposite to the bottom end. The engagement member is disposed in the accommodation groove. When the sleeve member is properly positioned on the second section by passing the second section through the through hole, the accommodation groove and the positioning groove meet each other so as to engage the engagement member with the positioning groove and achieve a firm engagement between the sleeve member and the second section. A gap is formed between a top surface of a screw head and the bottom end of the sleeve member when the second section is positioned properly in a socket of the screw head. Thus, the magnetic unit can attract the screw head though the magnetic force without contacting the screw head to thereby position and guide the screw head stably, help stabilize the screw head, and accelerate a screwing operation of the screw head. Meanwhile, the sleeve member can be separated from the second section and engaged with another second section provided with different types to thereby increase the convenience of use and practicality. Further, metal chips or powders generated during the screwing operation can be cleaned easily and quickly by removing the sleeve member from the second section and cleaning the metal chips or powders thereafter whereby the magnetic effect of the sleeve member is improved and the service life of the sleeve member is prolonged.
- Preferably, a cover unit extends outwards from the bottom end of the sleeve member. The cover unit defines a room communicating with the through hole.
- Preferably, the cover unit includes a lower end and an upper end. The upper end is connected to the bottom end of the sleeve member. An inner diameter of the lower end is larger than an inner diameter of the upper end.
- Preferably, the room of the cover unit defines a maximum diameter larger than a diameter of the through hole of the sleeve member.
- Preferably, the gap ranges from 2 mm to 3 mm.
- Preferably, the second section is formed into a cruciform type, a square type, or a hexalobular type.
- Preferably, the sleeve member is positioned in the middle of the second section when the accommodation groove and the positioning groove meet each other.
-
- Fig. 1
- is a schematic view showing a conventional magnetic screwdriver;
- Fig. 2
- is a schematic view showing an operation of the conventional magnetic screwdriver;
- Fig. 3
- is a schematic view showing a first preferred embodiment of this invention;
- Fig. 4
- is a schematic view showing an operation of the first preferred embodiment of this invention;
- Fig. 5
- is a schematic view showing that the sleeve member is detached from the second section;
- Fig. 6
- is a schematic view showing that the screwdriver is adapted to rotate the screw head into an object provided with a pre-drilled opening;
- Fig. 7
- is a schematic view showing a second preferred embodiment of this invention characterized by the cover unit;
- Fig. 8
- is a schematic view showing an operation of the second preferred embodiment of this invention; and
- Fig. 9
- is a schematic view showing that the sleeve member is detached from the second section.
- Referring to
Fig. 3 , a first preferred embodiment of ascrewdriver 4 is disclosed. Thescrewdriver 4 is driven by a driving tool (not shown) and adapted to engage with asocket 51 of ascrew head 5 in order to drive thescrew head 5 to execute a screwing operation. Thescrewdriver 4 in this preferred embodiment comprises afirst section 41 adapted to engage with the driving tool, asecond section 42 connected to thefirst section 41 and adapted to engage with thesocket 51 of thescrew head 5, asleeve member 43 sleevedly disposed on an outer periphery of thesecond section 42 and capable of being separated from thesecond section 42, and anengagement member 44 disposed in thesleeve member 43 and adapted to fix thesleeve member 43 to thesecond section 42. Apositioning groove 421 is annularly recessed into the outer periphery of thesecond section 42. A type of thesecond section 42 is corresponding to a type of thesocket 51 of thescrew head 5. The type of thesecond section 42 is formed into a cruciform type, a square type, a hexalobular type or other polygonal types. Here takes an example that thesecond section 42 is a hexalobular type which is commonly known as a Torx type. - Referring to
Fig. 3 andFig. 4 , thesleeve member 43 has abody 431 defining atop end 431A and abottom end 431B, a throughhole 432 penetrating through thebody 431 for defining an innerperipheral wall 431C between thetop end 431A and thebottom end 431B, amagnetic unit 433 disposed in the throughhole 432 and located opposite to thetop end 431A, and anaccommodation groove 434 recessed into the innerperipheral wall 431C and formed opposite to thebottom end 431B. Theengagement member 44 is disposed in theaccommodation groove 434. When thesecond section 42 passes through the throughhole 432 of thesleeve member 43 to position thesleeve member 43 properly on thesecond section 42, theaccommodation groove 434 and thepositioning groove 421 are located in correspondence and aligned with each other to thereby restrict theengagement member 44 between theaccommodation groove 434 and thepositioning groove 421 and position thesleeve member 43 in the middle of thesecond section 42. Thus, a firm engagement between thesleeve member 43 and thesecond section 42 is achieved. When thesecond section 42 is engaged with thesocket 51 of thescrew head 5, thebottom end 431B of thebody 431 is adjacent to but not in contact with atop surface 52 of thescrew head 5 to thereby form a gap D between thetop surface 51 and thebottom end 431B. The gap D ranges from 2 mm to 3 mm. - Referring to
Fig. 4 andFig. 5 , an installation of thescrewdriver 4 is executed by inserting thesecond section 42 through the throughhole 432 of thesleeve member 43 until theaccommodation groove 434 and thepositioning groove 421 face each other to thereby engage theengagement member 44 with thepositioning groove 421. Thus, thesleeve member 43 is positioned in the middle of thesecond section 42. After that, thesecond section 42 is inserted into thesocket 51 of thescrew head 5 to form the gap D between thebottom end 431B of thesleeve member 43 and thetop surface 52 of thescrew head 5, so themagnetic unit 433 attracts thescrew head 5 though the magnetic force without being in contact with thescrew head 5 whereby thescrew head 5 is positioned stably and properly. Further, the magnetic attraction between themagnetic unit 433 and thescrew head 5 can help guide and straighten thescrew head 5. After thescrew head 5 is straightened by thescrewdriver 4, a rotational force is applied on thescrewdriver 4 to further rotate thescrew head 5 into anobject 6 quickly and stably until thescrew head 5 enters into theobject 6 entirely to achieve a tight engagement between thescrew head 5 and theobject 6. Finally, thesecond section 42 of thescrewdriver 4 is removed from thesocket 51 of thescrew head 5 whereby the screwing operation of thescrew head 5 is completed. - After the
sleeve member 43 is properly engaged with thesecond section 42, thesleeve member 43 is positioned in the middle of thesecond section 42 stably. Hence, thebottom end 431B of thesleeve member 43 is spaced apart from thetop surface 52 of thescrew head 5 to form the gap D after thesecond section 42 is inserted into thesocket 51 of thescrew head 5. Thus, the gap D helps prevent metal chips or powders caused during the screwing operation from adhering to themagnetic unit 433 while the magnetic attraction is still maintained. Meanwhile, the gap D also prevents thetop surface 52 of thescrew head 5 from being rubbed unduly by thesleeve member 43. If the metal chips or powders enter into the throughhole 432, the metal chips or powders can be cleaned easily by detaching thesleeve member 43 from thesecond section 42 as shown inFig. 5 . After the metal chips or powders in the throughhole 432 are removed, thesecond section 42 is inserted into thesleeve member 43 through the throughhole 432 until theengagement member 44 is engaged with thepositioning groove 421 whereby thesleeve member 43 is properly engaged with thesecond section 42 and thescrewdriver 4 can be used again. - Referring to
Fig. 6 shows theobject 6 is provided with apre-drilled opening 61. After thesecond section 42 is positioned in thesocket 51 of thescrew head 5, thescrewdriver 4 can drive thescrew head 5 to screw into theopening 61 of theobject 6 without being hindered by thesleeve member 43. Because thesleeve member 43 is not in contact with thetop surface 52 of thescrew head 5 to form the gap D when thesecond section 42 is inserted into thesocket 51 of thescrew head 5, thesleeve member 43 will not contact and press theobject 6 to further allow thesecond section 42 to screw thescrew head 5 deeply into theopening 61. Meanwhile, the screwing operation of thescrew head 5 can be completed in one time and no additional tool is required. Further, theopening 61 will not be damaged by thescrewdriver 4. The screwing operation of thescrew head 5 can be executed smoothly to thereby attain the speedy and steady screwing effect. In order to drive thescrew head 5 provided with different types ofsockets 51, thesleeve member 43 can be separated from thesecond section 42 and detachably disposed on anothersecond section 42 having the type in correspondence with thesocket 51 of thescrew head 5. Hence, the user's burden is lightened by bringing only onesleeve member 43 and differentsecond sections 42. Further, when thesleeve member 43 is worn or damaged, thesecond section 42 can be still kept to be used withother sleeve member 43. Alternatively, when thesecond section 42 is worn or damaged, thesleeve member 43 can be kept to be used with othersecond section 42 to thereby reduce the cost and increase the convenience of use. - Referring to
Fig. 7 andFig. 8 show a second preferred embodiment of thescrewdriver 4 of this invention. The correlated elements and the concatenation of elements, the operation and objectives of the second preferred embodiment are the same as those of the first preferred embodiment. This embodiment is characterized in that acover unit 435 extends outwards from thebottom end 431B of thesleeve member 43 and defines aroom 435C communicating with the throughhole 432. Thecover unit 435 has alower end 435A and anupper end 435B. Theupper end 435B is connected to thebottom end 431B of thesleeve member 43. An inner diameter R1 of thelower end 435A is larger than an inner diameter R2 of theupper end 435B. The inner diameter R1 of thelower end 435A is also larger than a diameter R3 of the throughhole 432 of thesleeve member 43. In this preferred embodiment, the inner diameter R1, as for instance shown inFig. 7 , can be deemed to be a maximum diameter of theroom 435C of thecover unit 435. Thelower end 435A of thecover unit 435 and anend surface 422 of thesecond section 42 are aligned horizontally when thesleeve member 43 is positioned properly on thesecond section 42. In other words, thelower end 435A of thecover unit 435 and theend surface 422 of thesecond section 42 are located at the same horizontal line L when thesleeve member 43 is properly engaged with thesecond section 42. Thus, when thesecond section 42 is placed in thesocket 51 of thescrew head 5, thelower end 435A will not contact thetop surface 52 of thescrew head 5 but surround thescrew head 5 to thereby retain the metal chips or powders within theroom 435C of thecover unit 435 and prevent the metal chips or powders from spurting or hurting the user during the screwing operation. Simultaneously, themagnetic unit 433 can still attract thescrew head 5 without contacting thescrew head 5. After the screwing operation of thescrew head 5 is completed, the metal chips or powders remained in the throughhole 432 and theroom 435C of thecover unit 435 can be cleaned easily by removing thesleeve member 43 from thesecond section 42 and cleaning the throughhole 432 and theroom 435C thereafter as shown inFig. 9 to thereby improve the magnetic effect of thesleeve member 43 and improve the smoothness and the screwing effect of the screwing operation effectively. - To sum up, the screwdriver of this invention takes advantages that the engagement member is engaged with the positioning groove of the second section to position the sleeve member on the second section properly. When the second section is inserted into the socket of the screw, the bottom end of the sleeve member is spaced apart from the top surface of the screw head to form the gap whereby the magnetic unit can attract the screw head without being in contact with the screw head. Thus, the sleeve member can position and guide the screw head through the magnetic attraction to thereby accelerate the screwing operation of the screw head and attain the stable screwing effect. Further, the metal chips or powders caused during the screwing operation can be cleaned easily by detaching the sleeve member from the second section and cleaning the through hole thereafter to thereby improve the magnetic effect of the sleeve member and extend the service life of the sleeve member.
- While the embodiments of this invention are shown and described, it is understood that further variations and modifications may be made without departing from the scope of this invention.
Claims (7)
- A screwdriver (4) comprising a first section (41) driven by a driving tool and a second section (42) connected to said first section (41) and adapted to engage with a socket (51) of a screw head (5);
characterized in that a positioning groove (421) is annularly formed on an outer periphery of said second section (42), a sleeve member (43) being detachably disposed on said outer periphery of said second section (42), said sleeve member (43) including a body (431) defining a top end (431A) and a bottom end (431B), a through hole (432) formed through said body (431) for defining an inner peripheral wall (431C) between said top end (431A) and said bottom end (431B), a magnetic unit (433) disposed in said through hole (432) and located opposite to said top end (431A), and an accommodation groove (434) recessed into said inner peripheral wall (431C) and formed opposite to said bottom end (431B), with an engagement member (44) disposed within said accommodation groove (434) and with said second section (42) adapted to pass through said through hole (432) of said sleeve member (43), said accommodation groove (434) being located in correspondence with said positioning groove (421) for alignment therewith when said sleeve member (43) is properly positioned on said second section (42) to thereby engage said engagement member (44) with said positioning groove (421) and confirm achievement of a firm engagement between said sleeve member (43) and said second section (42), a gap (D) being formed between a top surface (52) of said screw head (5) and said bottom end (431B) of said sleeve member (43) when said second section (42) is properly engaged with said socket (51) of said screw head (5). - The screwdriver (4) according to claim 1, wherein a cover unit (435) extends outwards from said bottom end (431B) of said sleeve member (43), said cover unit (435) defining a room (435C) communicating with said through hole (432).
- The screwdriver (4) according to claim 2, wherein said cover unit (435) includes a lower end (435A) and an upper end (435B), said upper end (435B) being connected to said bottom end (431B) of said sleeve member (43), an inner diameter (Rl) of said lower end (435A) being larger than an inner diameter (R2) of said upper end (435B) .
- The screwdriver (4) according to claim 2, wherein said room (435C) of said cover unit (435) defines a maximum diameter larger than a diameter (R3) of said through hole (432) of said sleeve member (43) .
- The screwdriver (4) according to any one of claims 1 to 4, wherein said gap (D) ranges from 2 mm to 3 mm.
- The screwdriver (4) according to any one of claims 1 to 5, wherein said second section (42) is formed into a cruciform type, a square type, or a hexalobular type.
- The screwdriver (4) according to any one of claims 1 to 6, wherein said sleeve member (43) is positioned in the middle of said second section (42) when said accommodation groove (434) and said positioning groove (421) meet each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21202910.2A EP4166278A1 (en) | 2021-10-15 | 2021-10-15 | Screwdriver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21202910.2A EP4166278A1 (en) | 2021-10-15 | 2021-10-15 | Screwdriver |
Publications (1)
Publication Number | Publication Date |
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EP4166278A1 true EP4166278A1 (en) | 2023-04-19 |
Family
ID=78463384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP21202910.2A Withdrawn EP4166278A1 (en) | 2021-10-15 | 2021-10-15 | Screwdriver |
Country Status (1)
Country | Link |
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EP (1) | EP4166278A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3704356A1 (en) * | 1986-02-20 | 1987-08-27 | Volkswagen Ag | Guide sleeve on a screwing-tool shank |
CN205043687U (en) | 2015-09-14 | 2016-02-24 | 张秀华 | Formula bottle opener instrument is inhaled to magnetism |
US9406423B1 (en) * | 2015-11-18 | 2016-08-02 | Chung-Yu Tsai | Magnetic sleeve assembly |
US20170036329A1 (en) * | 2012-02-15 | 2017-02-09 | Black & Decker Inc. | Fastening tools with floating magnet sleeves |
US20170120428A1 (en) * | 2015-11-02 | 2017-05-04 | Compass Corporation | Screwdriver bit device with a magnetic structure |
US9833887B1 (en) * | 2016-09-21 | 2017-12-05 | Tsai-Fa Liu | Replaceable magnetic screw-locking depth positoining head |
-
2021
- 2021-10-15 EP EP21202910.2A patent/EP4166278A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3704356A1 (en) * | 1986-02-20 | 1987-08-27 | Volkswagen Ag | Guide sleeve on a screwing-tool shank |
US20170036329A1 (en) * | 2012-02-15 | 2017-02-09 | Black & Decker Inc. | Fastening tools with floating magnet sleeves |
CN205043687U (en) | 2015-09-14 | 2016-02-24 | 张秀华 | Formula bottle opener instrument is inhaled to magnetism |
US20170120428A1 (en) * | 2015-11-02 | 2017-05-04 | Compass Corporation | Screwdriver bit device with a magnetic structure |
US9406423B1 (en) * | 2015-11-18 | 2016-08-02 | Chung-Yu Tsai | Magnetic sleeve assembly |
US9833887B1 (en) * | 2016-09-21 | 2017-12-05 | Tsai-Fa Liu | Replaceable magnetic screw-locking depth positoining head |
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