CN113339378B

CN113339378B - Screw with composite pin hole

Info

Publication number: CN113339378B
Application number: CN202010100176.XA
Authority: CN
Inventors: 陈翎芳
Original assignee: Essence Method Refing Co ltd
Current assignee: Essence Method Refing Co ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2022-12-20
Anticipated expiration: 2040-02-18
Also published as: CN113339378A

Abstract

The invention relates to a screw with a composite pinhole, which is mainly characterized in that the end surface of a screw head is provided with a crossed and communicated cross groove and a driving groove, the driving groove comprises a plurality of arc parts which are arranged at intervals, an arc part is connected between any two arc parts, and a conical bottom part which is connected with the arc parts and the arc part and extends towards the bottom of the screw head, a reference point is formed at the joint of the conical bottom part and the arc parts and the arc part, a base line which is parallel to the central axis of the screw head extends towards the end surface from the reference point, and the arc parts and the arc part are arranged in a way that the base line is used as a reference line and the base line is inclined outwards from the center of the screw head, so that a first space formed by the arc parts and the arc part in a way of encircling is gradually narrowed at the bottom and wide at the top. The invention not only can lead the screw head and the inserted driving tool to achieve the stable combination effect and effectively transmit the driving force, but also can be suitable for the insertion of more than two driving tools, thereby greatly improving the convenience of use.

Description

Screw with composite pin hole

Technical Field

The present disclosure relates to screw designs, and particularly to a screw with a composite pin hole.

Background

Checking, no matter what the shape of the head of the screw with the driving hole is, the head of the screw with the driving hole is required to be actuated by an electric or manual driving tool to enable the screw to integrally rotate, and the universal screw head needle hole of the international standard has a shape of a word, a cross, a Chinese character 'mi', four corners, a hexagon, a quincuncial shape and the like (as shown in fig. 1), which can only limit the actuation of the corresponding driving tool, so that the screw can be locked or released and detached, so that each screw is limited to the defect of a single locking tool in use, therefore, for a user, the user needs to aim at each different driving hole, and needs to fully prepare tools with various types and specific types, so that the user can immediately find out the corresponding driving tool for use when in actual use, the situation that the locking operation cannot be smoothly performed due to the driving tool failure in correspondence during operation is avoided, the locking operation can be smoothly performed, the working time of the driving operation can be increased, the driving locking efficiency is reduced, the user can carry the screw more greatly, and the screw is not convenient to carry, and the market can be improved.

Disclosure of Invention

Therefore, the present invention is to provide a screw with a composite pin hole, wherein the end surface of the screw head is provided with a composite driving structure for inserting a plurality of driving tools, so as to effectively generate stable combination effect with more than two driving tools, thereby greatly increasing the convenience of use.

Therefore, the invention relates to a screw with a composite pinhole, which comprises a screw head, a rod body arranged on the screw head and a plurality of screw teeth annularly arranged on the rod body; wherein, the end surface of the screw head opposite to the rod body is provided with a cross-shaped groove and a driving groove which is overlapped and communicated with the cross-shaped groove; the driving groove comprises a plurality of arc parts which are arranged at intervals, two arc connecting surfaces which are formed at two sides of the arc part and extend outwards, and a conical bottom part which is connected with the arc parts and the arc connecting parts, extends inwards the bottom of the screw head and tapers into a cone shape, wherein a first space is formed by the joint of the arc parts and the arc connecting parts towards the end surface of the screw head in a surrounding way, a second space is formed by the conical bottom part towards the inner ring of the bottom of the screw head in a surrounding way, the first space is communicated with the second space, a reference point is formed at the joint of the conical bottom, the arc parts and the arc connecting parts, a bottom end point which is opposite to the reference point and forms an intersection with the central shaft due to the taper of the conical bottom part, and a base line which is parallel to the central shaft extends towards the end surface of the reference point, so that the arc parts and the arc connecting parts are arranged outwards in a tilting way from the center of the screw head by taking the base line as a reference, and the first space is arranged in a gradually increasing narrow upper width.

As a further improvement of the invention, the inclination is set to be 0.5 to 5 degrees.

As a further improvement of the invention, the cone bottom is formed with an imaginary line along the cone shape of the cone bottom towards two sides by taking the bottom end point as a reference, and the two imaginary lines are respectively intersected through the bottom end point to form an intersection angle not exceeding 120 degrees.

As a further improvement of the invention, the driving groove is a four-petal plum blossom groove with four arc parts arranged at intervals.

As a further improvement of the invention, the driving groove is a six-petal plum blossom groove with six arc parts arranged at intervals.

As a further improvement of the present invention, the bottom of the cone can be divided into a first inclined plane and a second inclined plane between the first inclined plane and the driving groove, wherein a first included angle is formed between the first inclined plane and the central axis, and a second included angle is formed between the second inclined plane and the central axis.

As a further improvement of the invention, the first included angle is set at an angle of 70 degrees, and the second included angle is set at an angle of 40 to 60 degrees.

As a further improvement of the invention, an actuating groove is additionally formed on the screw head, and the actuating groove is overlapped and communicated with the slot shaped like a Chinese character 'mi' and the driving groove, wherein the actuating groove is composed of at least four actuating sections with equal length, a connecting angle is formed at the joint of any two actuating sections, and a distance is formed between the actuating sections and the end surface, so that the actuating groove is positioned between the end surface of the screw head and the second space in a concave shape.

As a further improvement of the invention, an actuating groove is additionally formed on the screw head, and the actuating groove is overlapped and communicated with the slot shaped like a Chinese character 'mi' and the driving groove, wherein the actuating groove consists of six actuating sections with equal length, a connecting angle is formed at the joint of any two actuating sections, and a distance is formed between the actuating sections and the end surface, so that the actuating groove is positioned between the end surface of the screw head and the second space in a concave shape.

As a further improvement of the present invention, the one arc portion is formed between any two of the concave portions.

As a further improvement of the present invention, a connecting corner of the concave portion overlaps with a circular arc portion of the concave portion, and is formed between any two concave portions.

As a further improvement of the present invention, the connecting corner overlaps with the arc portion and the concave portion.

As a further improvement of the invention, a straight groove is further formed on the screw head, the straight groove is overlapped and communicated with the arrangement positions of the two corresponding concave parts of the driving groove and the rice-shaped groove, and the length of the straight groove is longer than that of the rice-shaped groove.

As a further improvement of the invention, a straight groove is additionally formed on the screw head, the straight groove is overlapped and communicated with the arrangement positions of the two corresponding concave parts of the driving groove, the actuating groove and the cross groove, and the length of the straight groove is longer than that of the cross groove.

As a further improvement of the invention, a straight groove is further formed on the screw head, the straight groove is overlapped and communicated with the arrangement positions of the two corresponding concave parts of the driving groove, the actuating groove and the cross groove, and the length of the straight groove is longer than that of the cross groove.

Compared with the prior art, the invention has the beneficial effects that:

the invention utilizes the design that the driving groove and the cross groove are formed on the end surface in an overlapping way to ensure that the screw head has a composite driving structure form, so that the screw head can be used for locking and detaching quickly in response to the insertion and fixation of different driving tools, and the screw head can be combined with different driving tools to effectively transmit the driving force generated by the driving tools, so that the locking operation is more labor-saving and easier, the driving operation by one hand is more facilitated, and the use convenience is greatly improved.

Drawings

FIG. 1 is a schematic illustration of an international, higher power drive bore;

FIG. 2 is a schematic view of a first preferred embodiment of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of the first preferred embodiment of FIG. 2;

FIG. 4 is a schematic view of a second preferred embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line B-B of the second preferred embodiment;

FIG. 6 is a schematic view of a third preferred embodiment of the present invention;

FIG. 7 is a schematic view of a fourth preferred embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a fifth preferred embodiment of the present invention;

FIG. 9 is a schematic view of a sixth preferred embodiment of the present invention;

FIGS. 10 to 12 are views illustrating seventh to ninth preferred embodiments of the present invention;

FIGS. 13-1 to 13-4 are schematic views of another embodiment of the sixth to ninth preferred embodiments.

Description of the symbols:

(present invention)

3: screw with composite pin hole

31: screw head

32: rod body

33: screw thread

311: end face

312: groove shaped like Chinese character' mi

313: driving groove

314: actuating groove

315: straight groove

3121: concave part

3122: narrow part

3131: arc part

3132: arc connection part

3133: conical bottom

3141: actuating section

3142: connecting corner

α: center shaft

Beta: base line

a1: wall surface

a2: side wall

b1: a first space

b2: the second space

b3: reference point

b4: bottom end point

b5: imaginary line

r: gradient of inclination

c1: first inclined plane

c2: second inclined plane

P: distance between

θ 1: angle of intersection

θ 2: first included angle

θ 3: second included angle

Detailed Description

These and other aspects, features and advantages of the present invention will become apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.

As shown in fig. 2 and 3, a preferred embodiment of the screw 3 with a composite pin hole of the present invention includes a screw head 31, a rod 32 disposed on the screw head 31, and a plurality of threads 33 annularly disposed on the rod 32; wherein, a central axis α is formed at the center of the screw head 31, and a cross-shaped groove 312 and a driving groove 313 formed on the end surface 311 of the screw head 31 opposite to the rod 32 and overlapping and communicating with the cross-shaped groove 312 are provided, the cross-shaped groove 312 is composed of four concave portions 3121 arranged at equal intervals and a narrow portion 3122 arranged between any two concave portions 3121 and having a size smaller than the concave portion 3121, each concave portion 3121 is composed of a wall surface a1 and two side walls a2 formed at both sides of the wall surface a1 and connected with the wall surface a1, and the wall surfaces a1 are arranged in a tapered manner of gradually inclining from the end surface 311 downwards to the inside of the screw head 31; in addition, the driving groove 313 includes a plurality of arc portions 3131 spaced apart from each other, two outwardly extending arc portions 3132 formed on both sides of each arc portion 3131, and a tapered bottom 3133 engaging with the arc portions 3131 and 3132 and extending inwardly toward the bottom of the screw head 31 and tapering conically, wherein a first space b1 is formed around the end surface 311 of the screw head 31 at the junction between the arc portions 3131 and the arc portions 3132, a second space b2 is formed around the bottom of the screw head 31 at the junction between the tapered bottom 3133 and the tapered bottom 3133, the first space b1 is communicated with the second space b2, and a reference point b3 is formed at the junction between the tapered bottom 3133 and the arc portions 3131 and 3132, and a bottom end point b4 opposite to the reference point b3 and forming a junction with the central axis α due to the tapered taper of the tapered bottom 3133, and the reference point b3 extends toward the end surface 311 with a base line β parallel to the central axis α, such that the arc portion 3131, the arc portion 3132 are disposed at an inclination r inclined from the center of the screw head 31 to the outside by 0.5 degrees to 5 degrees with respect to the base line β (see the imaginary line in fig. 3), and preferably 0.5 degrees, such that the first space b1 is disposed at a gradually narrowed lower portion and wider upper portion, and the tapered bottom 3133 is formed with an imaginary line b5 extending toward both sides of the tapered bottom 3133 with respect to the bottom end point b4, and the two imaginary lines b5 respectively form a junction angle θ 1 not exceeding 120 degrees through the bottom end point b 4; in this embodiment, the driving groove 313 is a four-petal quincunx groove having four circular arcs 3131 spaced apart from each other, and one circular arc 3131 of the driving groove 313 is formed between any two concave portions 3121, so that two circular arcs 3132 extending outward from the circular arc 3131 are respectively disposed in a connection manner with the adjacent side wall a2, so as to be formed to allow insertion of driving tools such as a rice-type driving tool, a cross-type driving tool, and a four-petal quincunx driving tool on the end surface 311 of the screw head 31.

As shown in fig. 2 and 3, in the locking operation, in view of the arrangement of the me-shaped recess 312 and the driving recess 313 in the shape of a four-petal plum blossom on the screw head 31, it is applicable to various driving tools for engaging with the screw head, i.e. any tool (not shown) in the form of a m, a cross, or a four-petal plum blossom, i.e. when a driving tool in the form of a m or a cross is inserted into the me-shaped recess on the screw head 31, the tapered insertion end of the driving tool can be easily inserted into the tapered recess 3121 through the recess 3121, and the driving tool can contact with the bottom end point b4 by forming a crossing angle θ 1 not exceeding 120 degrees through the crossing of the bottom end point b4, so that the driving tool meeting or not meeting the standard size of a m, a cross, or a cross can contact the bottom end point b4, but it will not cause the situation of being unable to insert and engage, of course, if the driving tool with four-petal plum blossom shape is inserted into the driving slot 313, the driving tool can be inserted deeper and attached to or partially attached to the arc 3131 and 3132 by the arrangement of the arc 3131 and 3132 inclined from the inside of the screw head 31 to 0.5-5 degrees with respect to the reference point b3, so that the driving tool can form a locking effect under the driving force of pressure and effectively transmit the driving force, therefore, no matter the tool with rice-shaped, cross-shaped or four-petal plum blossom shape is continuously pressed into the screw head 31, the driving tool can be connected to the wall a1, side wall a2 or 3131, 3131 of the driving slot 313, the curved portion 3132 forms a clamping and adhering contact state, so that the driving tool is not easy to loosen and reduce the swing, so as to apply the driving force to the screw head 31, and the screw 3 is driven to rotate by the guiding of the screw head 31, thereby making the locking operation more labor-saving and convenient, and if the driving tool is to be withdrawn, the driving tool can be withdrawn smoothly because the concave portion 3121, the curved portion 3131 and the curved portion 3132 have slopes; therefore, the design of the screw head 31 with a composite driving structure constructed by overlapping the cross-shaped groove 312 and the driving groove 313 not only enables the screw head 31 and the inserted driving tool to achieve stable combination effect and effectively transmit driving force, but also is suitable for inserting more than two driving tools, effectively improves the defect that the construction cannot be carried out by one hand inconveniently, and greatly improves the convenience of use.

As shown in fig. 4 and 5, the second preferred embodiment of the screw with composite pin holes of the present invention still includes the same structure as the first preferred embodiment, which is not repeated herein; in particular, in the present embodiment, the screw head 31 is further formed with an actuating groove 314 on the end surface 311, and the actuating groove 314 overlaps and communicates with the cross groove 312 and the driving groove 313, wherein the actuating groove 314 is composed of at least four actuating segments 3141 with equal length, a connecting angle 3142 is formed at the joint of any two actuating segments 3141, and a gap P is formed between the actuating segments 3141 and the end surface 311, so that the actuating groove 314 is in a concave shape and is located between the end surface of the screw head 31 and the second space b2, in the present embodiment, the actuating groove 314 is designed as a four-angle groove, and the actuating segments 3141 are in a non-tilt shape and are located between the cross groove 312 and the driving groove 313, and a connecting angle 3142 of the actuating groove 314 overlaps a portion 3131 of the driving groove 313 and is formed between any two concave portions 3121, as shown in the third preferred embodiment of fig. 6, the actuating groove 314 overlaps and a driving groove 311 of the cross groove 311 and a corresponding one of the driving groove 311; therefore, no matter what kind of shape the slot 312, the driving slot 313 and the actuating slot 314 are overlapped, the driving tool can be used in combination with a plurality of driving tools, such as a square driving tool, a cross driving tool, a quincunx driving tool, a four-petal driving tool, etc., which not only can make the screw head 31 and the inserted driving tool achieve a stable combination effect and effectively transmit the driving force, but also can be suitable for the insertion of more than one driving tool, thereby greatly improving the convenience of use.

As shown in fig. 7, in the fourth preferred embodiment of the screw with the compound type pinhole according to the present invention, the driving groove 313 is a six-lobed quincuncial groove, the actuating groove 314 is composed of at least six actuating segments 3141 with equal length, a connecting angle 3142 is formed at the joint of any two actuating segments 3141, a gap P is formed between the actuating segment 3141 and the end surface 311, the actuating groove 314 is disposed between the slot 312 and the driving groove 313 in a concave manner, in this embodiment, the actuating groove 314 is designed as a six-lobed groove, the actuating segments 3141 are disposed between the end surface of the screw head 31 and the second space b2 in a non-inclined manner, and the connecting angle 3142 of the actuating groove 314 overlaps with one of the circular arc portions 3131, is partially formed between any two of the concave portions 3121, and is disposed in an overlapping manner with the concave portion 3121; therefore, when the screw head 31 is provided with the cross-shaped groove 312, the driving groove 313 and the actuating groove 314 for any driving tool such as a cross-shaped tool, a hexagon-shaped tool and the like to be inserted into, the concave portions 3121 are inclined in the screw head 311 in a taper manner, and the circular arc portion 3131 and the arc portion 3132 are inclined in an inclined manner from the center of the screw head 31 to the outside with reference to the reference point b3, so that the driving tools and the screw head 31 can form a tight fit, the screw head 31 can reliably receive the actuating torque applied by the driving tool, and the driving force generated by the driving tool is effectively transmitted through the screw head 31 to drive the screw 3 to rotate, so that the screw 3 is reliably and stably combined with a locking object (not shown), not only the locking process is more convenient, but also the screw 3 is suitable for being used in a manner of performing construction with only one hand, so that the locking operation is more labor-saving.

As shown in fig. 8, the fifth preferred embodiment of the screw with composite pin holes of the present invention still includes the same structure as the first preferred embodiment, which will not be repeated; particularly, in order to be used with a driving tool with a smaller front end taper size or a driving tool with an unfit front end taper, in the present embodiment, the cone bottom 3133 may be divided into a first inclined surface c1 and a second inclined surface c2 located between the first inclined surface c1 and the driving groove 313, wherein a first included angle θ 2 between 60 degrees and 70 degrees is formed between the first inclined surface c1 and the central axis α, and a second included angle θ 3 between 40 degrees and 60 degrees is formed between the second inclined surface c2 and the central axis α, which is applicable to the above-mentioned embodiments, and thus, the description thereof is omitted; therefore, when in use, the second included angle θ 3 is set by utilizing the different inclinations formed by the second inclined plane c2 and the central axis α, so that when a driving tool with a smaller front end size, such as a quincunx or an irregular driving tool, is inserted, the driving tool can be reliably inserted into the tapered bottom 3133 and the second inclined plane c2 is deformed under the action of the driving force, so as to further form a clamping effect with a better bonding force between the tapered bottom 3133, the driving groove 313 and the driving tool, and effectively transmit the driving force, thereby improving the defect that the known driving tool with special specifications cannot be provided with a front end capable of being inserted into the bottom end of the screw head 31 for effective insertion driving, so that the locking operation can be more labor-saving and easier, the operation of driving with one hand can be facilitated, and the convenience of use can be greatly improved.

As shown in fig. 9, the sixth preferred embodiment of the screw 3 with composite pin holes of the present invention still includes the same structure as the first preferred embodiment, which is not repeated herein; in particular, in the present embodiment, a straight groove 315 is further formed on the screw head 31, and the straight groove 315 overlaps and communicates with the arrangement positions of the two corresponding concave portions 3121 of the driving groove 313, the actuating groove 314 and the cross groove 312, and the length of the straight groove 315 is longer than that of the cross groove 312, and the driving groove 313 and the actuating groove 314 are configured as a four-lobed quincuncial groove and a quadrangular groove, and the straight groove 315 can be further applied to the second to fourth preferred embodiments, i.e., the seventh to ninth preferred embodiments shown in fig. 10 to 12; of course, the length of the straight groove 315 provided in the above embodiments can be designed to penetrate through two sides of the screw head 31 as shown in fig. 13-1 to 13-4, so that the screw head 31 can be used with various driving tools, such as a square-shaped, cross-shaped, straight-shaped, and four-lobed quincuncial driving tool as shown in fig. 9 and 13-1, a square-shaped, cross-shaped, straight-shaped, four-lobed quincuncial, and four-lobed quincuncial driving tool as shown in fig. 10 to 11 and 13-2 to 13-3, or a square-shaped, cross-shaped, straight-shaped, and six-lobed quincuncial, and a hexagonal driving tool as shown in fig. 12 and 13-4.

In summary, the screw with composite pin hole of the present invention is mainly characterized in that the screw head has a composite structure for combining with different driving tools, so that when locking and operating, the screw can be used for locking with rapid fixing and dismounting according to the insertion and fixing of different driving tools, not only increasing the driven torque, but also being more suitable for one-hand construction, so that the locking operation is more labor-saving, and meanwhile, the screw head has a structure capable of combining with different driving tools for effectively transmitting the driving force generated by the driving tool, so that the locking operation is more labor-saving and easier, the screw is more beneficial to the one-hand driving operation, the convenience of use is greatly improved, and the purpose of the present invention is really achieved.

However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and should not be taken as limiting the scope of the invention, i.e., the invention is intended to cover all the modifications and equivalents of the claims and their equivalents.

Claims

1. A screw with a composite pinhole comprises a screw head, a rod body arranged on the screw head and a plurality of screw teeth annularly arranged on the rod body; the central axis is formed at the center of the screw head, a cross-shaped groove is formed on the end face of the screw head opposite to the rod body, the cross-shaped groove is composed of four concave parts which are arranged at equal intervals and a narrow part which is arranged between any two concave parts and has the depth smaller than that of the concave part, each concave part is composed of a wall face and two side walls which are formed at two sides of the wall face and connected with the wall face, and the wall face is obliquely arranged from the end face to the inside of the screw head; the method is characterized in that:

a driving groove overlapped and communicated with the slot is formed on the end face, wherein the driving groove comprises a plurality of arc parts which are arranged at intervals, two arc connecting parts which are formed at two sides of each arc part and extend outwards, and a conical bottom part which is connected with the arc parts and the arc connecting parts, extends inwards the bottom of the screw head and tapers into a cone shape, a first space is formed by the joint of the arc parts and the arc connecting parts at the conical bottom part and surrounds the end face of the screw head, a second space is formed by the conical bottom part and surrounds the inner periphery of the bottom of the screw head, the first space is communicated with the second space, and a reference point is formed at the joint of the conical bottom part, the arc parts and the arc connecting parts, and a bottom end point opposite to the reference point and forming intersection with the central shaft due to the conical tapering of the conical bottom part, and meanwhile, the reference point extends towards the end surface to form a base line which is parallel to the central shaft, so that the arc part and the arc part are arranged outwards from the center of the screw head to form an inclination with 0.5-5 degrees of deflection by taking the base line as the reference, so that the first space is arranged in a gradually-increased narrow-down and wide-up manner, furthermore, an imaginary line is formed along the conical shape of the conical bottom part towards two sides by taking the bottom end point as the reference, and the two imaginary lines respectively form an intersection angle which is not more than 120 degrees through the intersection of the bottom end points.

2. The screw with composite pin hole as claimed in claim 1, wherein the driving groove is a four-petal plum blossom groove having four circular arc portions arranged at intervals.

3. The screw of claim 1, wherein the driving groove is a six-lobe quincuncial groove having six spaced circular arcs.

4. The screw of claim 1, wherein the bottom of the cone is divided into a first inclined surface and a second inclined surface between the first inclined surface and the driving groove, and the first inclined surface forms a first angle with the central axis and the second inclined surface forms a second angle with the central axis.

5. The screw with composite pin hole as claimed in claim 4, wherein the first angle is set to 70 degrees and the second angle is set to 40-60 degrees.

6. The screw of claim 2, wherein the screw head further has an actuating slot formed thereon, and the actuating slot overlaps and communicates with the slot and the driving slot, wherein the actuating slot is composed of at least four actuating segments with equal length, and a connecting angle is formed at the connecting position of any two actuating segments, and a space is formed between the actuating segments and the end surface, so that the actuating slot is recessed between the end surface of the screw head and the second space.

7. The screw of claim 3, wherein the screw head further has an actuation slot, and the actuation slot overlaps and communicates with the slot and the driving slot, wherein the actuation slot comprises six actuation segments with equal length, and a connecting angle is formed at the connecting position of any two actuation segments, and a space is formed between the actuation segment and the end surface, so that the actuation slot is recessed between the end surface of the screw head and the second space.

8. The screw of claim 2, wherein one of the circular arc portions is formed between any two of the concave portions.

9. The screw with composite pin hole as claimed in claim 6 or 7, wherein one of the connecting corners overlaps one of the circular arc portions and is formed between any two of the concave portions.

10. The screw with composite pin hole as claimed in claim 6 or 7, wherein one of the corners overlaps one of the circular arc portions and one of the concave portions.

11. The screw of claim 1, wherein a slot is further formed on the screw head, and the slot overlaps and communicates with the driving slot and the recess of the slot, and the slot is longer than the slot.

12. The screw of claim 6, wherein a slot is formed on the screw head, and the slot overlaps and communicates with the driving slot, the actuating slot and the recess of the slot, and the slot is longer than the slot.

13. The screw of claim 7, wherein a slot is further formed on the screw head, and the slot overlaps and communicates with the driving slot, the actuating slot and the recess of the slot, and the slot is longer than the slot.