CN211715505U

CN211715505U - Screw with composite pin hole

Info

Publication number: CN211715505U
Application number: CN202020181990.4U
Authority: CN
Inventors: 陈翎芳
Original assignee: Essence Method Refing Co ltd
Current assignee: Essence Method Refing Co ltd; Essence Method Refine Co Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-10-20
Anticipated expiration: 2030-02-18

Abstract

The utility model discloses screw with combined type pinhole, it mainly sets up the setting of the rice word groove that overlap and be linked together and drive groove on the terminal surface of spiral shell head, this drive groove is including the arc portion that a plurality of intervals set up, be connected with an arc portion between two these arc portions wantonly, and one with the conical bottom portion that these arc portion and arc portion link up and extend to this spiral shell head bottom, and this conical bottom portion and this arc portion, the department of linking mutually of arc portion is formed with a benchmark, and this benchmark has one to be parallel baseline with the center pin of this spiral shell head toward the terminal surface extension, this arc portion simultaneously, arc portion uses this baseline to outwards be the setting of the slope of incline by this spiral shell head center, make by these arc portion, the first space that arc portion encloses and form is the setting of gradual narrow upper width under the narrow of gradual increase. The utility model discloses not only can make this spiral shell head reach stable combination effect with male driving tool, effective transmission drive power also can be suitable for more than two kinds of driving tool to insert simultaneously, promotes the convenience of use greatly.

Description

Screw with composite pin hole

Technical Field

The utility model relates to a design of screw especially relates to a screw with combined type pinhole.

Background

Checking that the head of the screw with driving hole in the market is required to be actuated by an electric or manual driving tool to rotate the screw as a whole no matter what the shape of the head is, and the universal screw head needle hole of international standard has a character, a cross, a Chinese character 'mi', four corners, a hexagon, a quincuncial shape and the like (as shown in figure 1), which can only limit the actuation of the corresponding driving tool, so as to carry out screwing or releasing and dismounting, so that each kind of screw is limited to the defect of a single locking tool in use, therefore, for a user, the user needs to have various types of tools with specific relative types aiming at each different driving hole, so that the user can immediately find out the corresponding driving tool for use when in actual use, and the situation that the locking operation cannot be carried out smoothly due to the driving tool being incapable of corresponding during operation is avoided, the locking operation can be smoothly performed, the operation time is increased invisibly, the driving locking efficiency is greatly reduced, the carrying burden of a user is further caused, the use is inconvenient, and the applicability of the locking device cannot be popularized to the mass market and needs to be improved.

SUMMERY OF THE UTILITY MODEL

Therefore, the present invention is to provide a screw with a composite pin hole, which is a composite driving structure for a plurality of driving tools to insert into the screw head, and can effectively generate stable combination effect with more than two driving tools, thereby greatly increasing the convenience of use.

Therefore, the utility model relates to a screw with 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; wherein, 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 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 parts towards the end surface of the screw head by the conical bottom part, a second space is formed by the conical bottom part towards the inner ring of the bottom of the screw head, the first space is communicated with the second space, a reference point is formed at the joint of the conical bottom part, the arc parts and the arc parts, and a bottom end point which is opposite to the reference point and meets the central shaft by the taper of the conical bottom part, and a base line which is parallel to the central shaft extends towards the end surface, so that the arc parts and the arc parts are arranged in a slant way outwards from the center of the screw head by taking the base line as a reference, so that the first space is arranged with gradually narrowed lower part and wider upper part.

As a further improvement of the utility model, the inclination is set to 0.5-5 degrees.

As a further improvement of the present invention, the cone bottom is formed with an imaginary line by using the bottom end point as a reference to extend the cone bottom toward both sides, and the two imaginary lines are crossed through the bottom end point to form a crossing angle not exceeding 120 degrees.

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

As a further improvement of the utility model, 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, a first included angle is formed between the first inclined plane and the central shaft, and a second included angle is formed between the second inclined plane and the central shaft.

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

As a further improvement, the screw head is additionally provided with an actuating groove, and the actuating groove is overlapped with the groove and the groove, the driving groove, wherein the actuating groove is formed by at least four equal-length actuating sections, and the connecting section is formed with a connecting angle, and the actuating section is formed with an interval between the end face and the end face, so that the actuating groove is located between the end face and the second space of the screw head.

As a further improvement, the screw head is additionally provided with an actuating groove, and the actuating groove is overlapped with the groove and the groove, the driving groove, wherein the actuating groove is formed by six equal-length actuating sections, and the connecting section is formed with a connecting angle, and the section and the end face are formed with an interval, so that the actuating groove is between the end face of the screw head and the second space.

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

As a further improvement of the present invention, the connecting corner overlaps with the arc portion and is formed between any two of the 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 present invention, a linear groove is further formed on the screw head, and the linear groove overlaps and communicates with the driving groove and the concave portion of the two corresponding concave portions of the slot shaped like a Chinese character 'mi', and the length of the linear groove is longer than that of the slot shaped like a Chinese character 'mi'.

As a further improvement of the present invention, a linear groove is formed on the screw head, and the linear groove overlaps and communicates with the driving groove, the actuation groove and the concave portion of the two corresponding concave portions of the linear groove, and the linear groove is longer than the groove of the meter shape.

As a further improvement of the present invention, a linear groove is further formed on the screw head, and the linear groove overlaps and communicates with the driving groove, the actuation groove and the concave portion of the two corresponding concave portions of the linear groove, and the linear groove is longer than the linear groove.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses utilize this drive groove and the design that this meter word groove overlap formed on this terminal surface, so that this spiral shell head has the composite drive structure kenel and presents, so can fix in response to the inserting of the driving tool of difference, establish the use in order to supply to fix the lock that unloads fast, make this spiral shell overhead have can combine with different driving tool, be used for effectively will transmitting the produced drive power of this driving tool, so can make the lock establish the operation more laborsaving and light, more be favorable to the one hand to carry out going on of drive operation, promote the convenience of use by a wide margin.

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 is 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 implementation of the sixth to ninth preferred embodiments.

Description of the symbols:

(the utility model)

3: screw with composite pin hole

31: screw head

32: rod body

33: 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 angle

α: center shaft

Beta: base line

a 1: wall surface

a 2: side wall

b 1: the first space

b 2: second space

b 3: reference point

b 4: bottom end point

b 5: imaginary line

r: gradient of inclination

c 1: first inclined plane

c 2: second inclined plane

P: distance between each other

θ 1: angle of intersection

θ 2: first included angle

θ 3: second included angle

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of preferred embodiments of the invention when read in conjunction with the accompanying drawings.

As shown in fig. 2 and 3, a preferred embodiment of the screw 3 with a composite pinhole according to 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 two 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 to the interior 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 inward toward the bottom of the screw head 31 and tapering in a tapered shape, wherein the arc portions 3131 and 3132 surround the end surface 311 of the screw head 31 at a position where the tapered bottom 3133 is connected to form a first space b1, the tapered bottom 3133 surrounds the bottom of the screw head 31 to form a second space b2, the first space b1 and the second space b2 are connected to each other, a reference point b3 is formed at a position where the tapered bottom 3133 is connected to the arc portions 3131 and 3132, and a reference point b3 is opposite to the reference point b3, and a base line 3 extends toward the base line 36311 at a point where the tapered bottom α of the center axis α and the base line 4 are parallel to each other, an inclined portion r (see the imaginary line in fig. 3) which makes the arc portion 3131 and the arc portion 3132 incline outward from the center of the screw head 31 by 0.5 to 5 degrees with respect to the base line β (see the imaginary line in fig. 3), and preferably 0.5 degree, so that the first space b1 is gradually narrowed downward and widened upward, and further, an imaginary line b5 is formed by the conical bottom 3133 along the two sides with respect to the bottom end point b4, and the two imaginary lines b5 intersect through the bottom end point b4 to form an intersection angle θ 1 not exceeding 120 degrees; in this embodiment, the driving groove 313 is a four-petal quincunx groove having four circular arc portions 3131 arranged at intervals, and one circular arc portion 3131 of the driving groove 313 is formed between any two concave portions 3121, so that two circular arc portions 3132 extending outward from the circular arc portion 3131 are respectively arranged in a connection manner with the adjacent side wall a2, so as to form the driving groove to allow insertion of driving tools such as a m-shape, a cross-shape, and a quincunx shape having four petals on the end surface 311 of the screw head 31.

As shown in fig. 2 and 3, in the locking operation, since the screw head 31 is provided with the me-shaped groove 312 and the driving groove 313 in the shape of a four-petal plum blossom at the same time, it is applicable to various driving tools to be engaged with the screw head, i.e. any tool (not shown) in the shape of a m, a cross, or a four-petal plum blossom, i.e. when a driving tool in the shape of a m or a cross is inserted into the me-shaped groove of the screw head 31, at this time, the driving tool having a tapered shape is disposed in the screw head 311 through the concave portions 3121, the tapered insertion end of the driving tool can easily enter, and the driving tool is tightly engaged with the concave portions 3121, so that an intersection angle θ 1 not more than 120 degrees is formed by the intersection of the bottom end point b4, and the driving tool conforming to the standard size of a m, a cross or not conforming to a standard size of a m, a cross can be contacted with the bottom end point b4, but it will not cause the situation of being unable to insert and engage, 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 installation of the arc 3131 and 3132 inclined from the inside of the screw head 31 to 0.5-5 degrees with reference 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 shape, cross shape or plum blossom shape with four petals is continuously pressed into the screw head 31, the driving tool can form a locking contact state with the wall surface 1 of the recess 3121, the side wall a2 or the arc 3131 and 3132 of the driving slot 313, the driving tool is not easy to be loosened and the shaking is reduced, so that the driving force is really applied to the screw head 31, and the screw 3 is driven to rotate by the guiding of the screw head 31, thereby the locking operation is more labor-saving and convenient, and if the driving tool is to be withdrawn, the driving tool can be withdrawn smoothly because the concave portions 3121, the circular arc portion 3131 and the arc portion 3132 have the inclination; 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 by one hand is inconvenient, and greatly improves the convenience of use.

As shown in fig. 4 and 5, the structure of the second preferred embodiment of the screw with composite pin holes of the present invention is the same as that of the first preferred embodiment, and will not be repeated; 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 connecting position 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 between the end surface of the screw head 31 and the second space b2, in the present embodiment, the actuating groove 314 is in a design of a four-angle groove, and the actuating segments 3141 are in a non-inclined shape between the cross groove 312 and the driving groove 313, and a connecting angle 3142 of the actuating groove 314 overlaps with an arc 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, a connecting angle 3142 of the actuating groove 314 is overlapped with an arc portion 3131 of the driving groove 313 and a concave portion 3121 of the cross-shaped groove 312; 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 composite pin hole of the present invention, the driving groove 313 is a six-petal wobbler groove, and the actuating groove 314 is composed of at least six actuating segments 3141 with equal length, and a connecting angle 3142 is formed at the connecting position 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 recessed between the wobbler groove 312 and the driving groove 313, in this embodiment, the actuating groove 314 is a design with a six-angle groove, and the actuating segments 3141 are not inclined and are located between the end surface of the screw head 31 and the second space b2, and the connecting angle 3142 of the actuating groove 314 overlaps with the arc 3131 thereof, and is partially formed between any two recessed portions 3121 and partially overlaps with the recessed portion 3121; therefore, when the screw head 31 is provided with the slot 312, the driving slot 313 and the actuating slot 314 for any driving tool such as a cross-shaped tool, a hexagon-shaped tool, etc. to be inserted into, the recess 3121 is inclined in the screw head 311, and the arc 3131 and the arc 3132 are inclined 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), which not only makes the locking process more convenient, but also is suitable for being used in a construction mode 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 is not repeated herein; particularly, in order to be used with a driving tool with a smaller front end taper size or a driving tool with an irregular 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 is not repeated herein; therefore, when in use, the second included angle θ 3 is set by utilizing the different inclinations formed by the second inclined surface 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 surface c2 is deformed under the action of driving force, so as to further form a locking effect with a better binding 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 which cannot provide a special specification can not be inserted into the bottom end of the screw head 31 for effective insertion driving, so that the locking operation is more labor-saving and easier, the driving operation with a single hand is more facilitated, and the convenience in use is greatly improved.

As shown in fig. 9, the structure of the sixth preferred embodiment of the screw 3 with composite pin holes of the present invention is the same as that of 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 linear groove 315 in the above embodiments can be designed to penetrate through both 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 driving tool in a shape of a Chinese character 'mi', a cross, a straight line, and four petals in fig. 9 and 13-1, a driving tool in a shape of a Chinese character 'mi', a cross, a straight line, and four petals in fig. 10 to 11 and 13-2 to 13-3, a driving tool in a shape of a Chinese character 'mi', a cross, a straight line, and four petals in a shape of a Chinese character 'mi', a driving tool in a shape of a cross, a square line, and a driving tool in a shape of a hexagon in fig. 12 and 13-4, which can be applied to not only the stable combination effect of the screw head 31 and the inserted driving tool, but also effective transmission of driving force, and insertion of various driving tools, greatly improving the convenience of use.

Concluding up the aforesaid, the utility model discloses screw with combined type pinhole, mainly through the overhead complex structural design that can supply different driving tool to combine that has of this spiral shell, when carrying out lock and operation, can fix in response to the insertion of different driving tool, establish the use for the lock that unloads is fixed fast, not only multiplicable receiving driven torsion, be more applicable to the one-hand construction, make the closure operation more laborsaving, make simultaneously to have on this spiral shell overhead can combine with different driving tool, be used for effectively will transmitting the produced drive power of this driving tool, so can make the lock establish the operation more laborsaving and light, more be favorable to the one-hand going on of driving the operation, promote the convenience of use by a wide margin, so can reach really the utility model aims.

However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and all simple equivalent changes and modifications made according to the claims and the specification of the present invention should be covered by the present invention.

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:

the end face is additionally provided with a driving groove which is overlapped and communicated with the parallel groove, wherein the driving groove comprises a plurality of arc parts which are arranged at intervals, two arc 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 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 parts to the end face of the screw head through the conical bottom part, a second space is formed by the conical bottom part to the inner circle of the bottom of the screw head, the first space is communicated with the second space, a reference point is formed at the joint of the conical bottom part and the arc parts, and a bottom end point which is opposite to the reference point and forms a junction with the central shaft because the conical bottom part tapers into the cone shape, and a base line which is parallel to the central shaft extends towards the end face of the reference point, the arc part and the arc part are arranged in a manner of inclining outwards from the center of the screw head by taking the base line as a reference, so that the first space is gradually narrowed at the lower part and widened at the upper part.

2. The screw with composite pin hole as claimed in claim 1, wherein the inclination is set to 0.5-5 °.

3. The screw of claim 1, wherein the bottom of the cone extends along the cone shape of the bottom of the cone towards two sides with reference to the bottom end point to form an imaginary line, and the two imaginary lines respectively form an intersection angle not exceeding 120 degrees through the intersection of the bottom end point.

4. The screw with composite needle hole as claimed in claim 1, wherein the driving groove is a four-petal plum-blossom groove having four arc portions spaced apart from each other.

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

6. 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.

7. The screw of claim 6, wherein the first included angle is set at 70 degrees, and the second included angle is set at 40-60 degrees.

8. The screw of claim 4, 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.

9. The screw of claim 5, 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.

10. The screw of claim 4, wherein a circular arc portion is formed between any two of the recesses.

11. The screw with composite pin hole as claimed in claim 8 or 9, wherein the connecting corner overlaps with a circular arc portion of the screw and is formed between any two of the recesses.

12. The screw with composite pin hole as claimed in claim 8 or 9, wherein the connecting corner overlaps with the arc portion and the concave portion.

13. 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.

14. The screw of claim 8, 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.

15. The screw of claim 9, 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.