TWI790757B - Screws, screwdrivers, and combinations of screws and screwdrivers - Google Patents

Abstract

A screw includes a stud and a screw head. The screw head is arranged at one end of the stud and jointly defines an axis with the stud. The screw head includes an end surface opposite to the end of the stud, and a plurality of holding parts. The screw head is formed with a a guide hole whose end face is recessed toward the stud and extends along the axis; the retaining parts are located around the guide hole and arranged around the axis at intervals; each of the retaining parts is adjacent to the end face along the axis Each of the retaining portions extends radially along one end perpendicular to the axis at a distance apart. In this way, the screw can have a good anti-theft effect. The invention also provides a screwdriver and a combination of a screw and a screwdriver.

Description

Screws, screwdrivers, and combinations of screws and screwdrivers

The present invention relates to a screw, a screwdriver and a combination of a screw and a screwdriver, in particular to a screw, a screwdriver and a combination of a screw and a screwdriver with an anti-theft function.

Existing screws with anti-theft function are usually recessed on the end face of the screw head to form a groove of a special shape, and a screwdriver corresponding to the shape of the groove is inserted into the groove to drive the screw to rotate to turn it. in or out.

Since the groove is only recessed from the end face along the axial direction of the screw, a person with a heart can still generate a point of force after inserting a screwdriver or tool similar to the shape of the groove into the groove and then turn the screw to rotate. Therefore, the anti-theft effect that the screw can play is not good.

Therefore, it is an object of the present invention to provide a screw capable of overcoming at least one of the disadvantages of the prior art.

Therefore, the screw of the present invention includes a stud and a screw head. the screw The head is arranged at one end of the stud and defines an axis together with the stud, the screw head includes an end face opposite to the end of the stud, and a plurality of holding parts, the screw head forms a a guide hole that is recessed toward the stud and extends along the axis; the retaining parts are located around the guide hole and arranged around the axis at intervals; each of the retaining parts is spaced apart from the end surface along the axis by a distance , each of the holding portions extends radially along one end perpendicular to the axis.

In some implementation aspects, each of the holding parts has a locking groove extending radially outward from the outer periphery of the guide hole along the radial direction of the head and communicating with the guide hole.

In some embodiments, each holding portion further has two holding surfaces respectively located on opposite sides of the slot, and the holding surfaces are spaced apart along the other head radial direction perpendicular to the head radial direction and are parallel to each other.

In some implementation aspects, each of the holding portions has two holding surfaces, and the holding surfaces are spaced apart along the other head radial direction perpendicular to the head radial direction and are parallel to each other.

In some implementations, the screw head further includes a stop surface between the stud and the holding parts and facing the holding parts, and a stop surface protruding from the stop surface and located in the guide hole Inner push boss.

In some embodiments, the pushing post has a hemispherical surface, and an outer peripheral surface connected between the blocking surface and the hemispherical surface.

In some implementations, the end surface is circular.

In some implementation aspects, the guide hole has a plurality of alignment grooves surrounding the axis at angular intervals and respectively aligned with the holding portions.

In some embodiments, the screw head further includes a plurality of arc-shaped chamfered surfaces surrounding the axis at intervals, each of the arc-shaped chamfered surfaces is located at the corresponding holding portion and the corresponding alignment groove portion between.

Another object of the present invention is to provide a screwdriver that overcomes at least one of the disadvantages of the prior art.

Therefore, the screwdriver of the present invention includes a handle bar and a plurality of holding arms. The handle extends along an axis. The holding arms are arranged on the handle bar and are angularly spaced around the axis and arranged in a ring shape, each of the holding arms includes a connecting arm body movably connected to the handle bar and partially exposed to the handle bar, and a holding portion protruding from the outside of the connecting arm body and located outside the grip bar, the holding arms can be operated to switch between a closed state and an unfolded state, when the holding arms are in the closed state , the holding portions of the holding arms are close to each other, and when the holding arms are in the unfolded state, the holding portions of the holding arms are far away from each other.

In some embodiments, the connecting arm body has an outer surface and a head end located outside the grip bar, and the holding portion is a block protruding from the outer surface and adjacent to the head end.

In some embodiments, the outer surface is arc-shaped, and the holding portion protrudes outward from the outer surface along an arm radial direction, the holding portion has two force application surfaces, and the force application surfaces The faces are spaced apart and parallel to each other along the radial direction of the other arm perpendicular to the radial direction of the arm.

In some embodiments, the retaining portion further has a first outer arc chamfered surface at an end opposite to the grip rod, and a second outer arc opposite to the first outer arc chamfered surface Chamfered face.

In some embodiments, the connecting arm body has an inner arc-shaped chamfer surface located inside the holding portion.

In some embodiments, the connecting arm body is formed with an accommodating groove inside the holding portion, and the connecting arm body further has two abutting sides respectively located on opposite sides of the accommodating groove.

In some embodiments, the connecting arm body of each holding arm is rotatably pivoted to the handle bar, and the screwdriver further includes a set of connecting arm bodies set on the holding arms for exerting elasticity thereon Elastic ring for constriction.

In some embodiments, the handle includes a housing and a limiting bead disposed in the housing, and the connecting arm body of each holding arm is rotatably pivoted between the housing and the limiting bead And can rotate around the limiting bead.

In some embodiments, the housing forms an accommodating space, and a plurality of pivot joints surrounding the axis at angular intervals and located outside the accommodating space, each of the pivot joints has a pivot joint slot, The pivot joint slot extends radially outward along a shell and communicates with the accommodating space, the connecting arm body has an arm portion partially accommodated in the accommodating space, and a pivot plate portion, and the arm portion has a located at the rear end of the containing space, and a Adjacent to the tail end and abutted against the concave arc surface of the limiting bead, the parts of the arms of the holding arms adjacent to the tail ends are stretched outward by the limiting bead to maintain a proper distance, the pivot joint The plate protrudes radially outward from the side of the arm portion opposite to the concave arc surface, is adjacent to the tail end, and is rotatably pivotally connected to the corresponding pivot slot.

In some embodiments, each of the pivot joints also has two pressing surfaces respectively located on opposite sides of the pivot joint groove, and the pressing surfaces are spaced apart along the radial direction of the other shell perpendicular to the radial direction of the shell. and parallel to each other, the pivot plate portion has two pressure-receiving surfaces respectively facing the corresponding pressure-applying surfaces, and the pressure-receiving surfaces are spaced apart along the radial direction of the other arm perpendicular to the radial direction of the arm and are parallel to each other.

Yet another object of the present invention is to provide a screw and screwdriver combination that overcomes at least one of the disadvantages of the prior art.

Therefore, the combination of the screw and the screwdriver of the present invention includes a screw and a screwdriver. The screw includes a stud and a screw head. The screw head is arranged at one end of the stud and jointly defines a first axis with the stud. The screw head includes an end surface opposite to the end of the stud, and a plurality of first holding parts. The screw head A guide hole is formed which is recessed from the end surface toward the stud and extends along the first axis. The first holding parts are located around the guide hole and arranged around the first axis at intervals. Each of the There is a distance between the first holding portion and the end surface along the first axis, and each of the first holding portions extends radially along a head perpendicular to the first axis. The screwdriver is used for inserting into the screw and includes a grip bar and a plurality of holding arms. The handle extends along a second axis stretch. The holding arms are arranged on the handle bar and are angularly spaced around the second axis and arranged in a ring shape, each of the holding arms includes a connecting arm movably connected to the handle bar and partially exposed to the handle bar Body, and a second holding part protruding from the outside of the connecting arm body and located outside the grip bar, the connecting arm body is used to insert into the guide hole, and the second holding part is used to hold the corresponding The first holding part, the holding arms can be operated to switch between a closed state and an unfolded state, when the holding arms are in the closed state, the second holding parts of the holding arms are close to each other , so that the second holding parts can be plugged into the guide holes. When the holding arms are in the unfolded state, the second holding parts of the holding arms are far away from each other, so that the second holding parts can be respectively held on the first holding parts.

In some embodiments, each of the first holding parts has a slot extending from the outer periphery of the guide hole along the radial direction of the head and communicating with the guide hole, and the connecting arm body has an outer surface , and a head end located outside the grip bar, the second holding portion is a block protruding from the outer surface and adjacent to the head end for locking into the corresponding slot of the first holding portion .

In some embodiments, each of the first holding parts further has two holding surfaces respectively located on the opposite sides of the slot, and the holding surfaces are spaced apart from each other along the other head radial direction perpendicular to the head radial direction. Parallel, the outer surface is arc-shaped, the second holding portion protrudes outward from the outer surface along an arm radial direction, and the second holding portion has two force-applying surfaces respectively used to abut against the holding surfaces , the force-applying surfaces are along the other side perpendicular to the radial direction of the arm The arms are radially spaced apart and parallel to each other.

In some implementations, the screw head further includes a stop surface between the stud and the first holding parts and facing the first holding parts, and a stop surface protruding from the stop surface and located at The pushing post in the guide hole, the stop surface is used to stop the holding arms, and the pushing post is used to push the holding arms so that the holding arms are changed from the closed state to the holding arms. expanded state.

In some embodiments, the pushing post has a hemispherical surface, and the connecting arm body has an inner arc chamfered surface located inside the second holding portion for pushing by the hemispherical surface.

In some embodiments, the connecting arm body is formed with an accommodating groove on the inner side of the second holding part for accommodating a part of the pushing protrusion, and the pushing protrusion also has a surface and the outer peripheral surface between the hemispherical surface, the connecting arm body also has two abutting sides respectively located on opposite sides of the accommodating groove, and each of the abutting sides can abut against the outer peripheral surface through line contact and slide on the outer peripheral surface.

In some implementations, the screw head further includes a pushing post located in the guide hole, and the pushing post is used to push the holding arms to change the holding arms from the closed state to In the unfolded state, the connecting arm body of each holding arm is rotatably pivoted to the handle bar, and the screwdriver also includes the connecting arm bodies set on the holding arms to apply elastic contraction force to it elastic ring.

In some embodiments, the handle includes a housing, and a The limiting bead in the housing, the connecting arm body of each holding arm is rotatably pivoted between the housing and the limiting bead and can rotate around the limiting bead.

In some embodiments, the housing forms an accommodating space, and a plurality of pivot joints surrounding the second axis at angular intervals and located outside the accommodating space, and each of the pivot joints has a pivot joint slot, the pivot slot extends radially outward along a shell and communicates with the accommodating space, the connecting arm body has an arm part accommodated in the accommodating space, and a pivot plate part, the arm part It has a tail end located in the accommodating space, and a concave arc surface adjacent to the tail end and abutting on the limiting bead, the positions of the arms of the holding arms adjacent to the tail ends are restricted by the The bit beads are stretched outwards to keep an appropriate distance, and the pivot plate protrudes outwards along the radial direction of the arm from the side of the arm opposite to the concave arc surface, and is adjacent to the tail end and is rotatably pivoted to the Corresponding to the pivot slot.

In some embodiments, each of the pivot joints also has two pressing surfaces respectively located on opposite sides of the pivot joint groove, and the pressing surfaces are spaced apart along the radial direction of the other shell perpendicular to the radial direction of the shell. and parallel to each other, the pivot plate portion has two pressure-receiving surfaces respectively facing the corresponding pressure-applying surfaces, and the pressure-receiving surfaces are spaced apart along the radial direction of the other arm perpendicular to the radial direction of the arm and are parallel to each other.

In some implementations, the end surface is circular.

In some embodiments, the guide hole has a plurality of alignment grooves surrounding the first axis at angular intervals and respectively aligned with the first holding parts, and the alignment grooves are respectively used for A part of the second holding parts are inserted, and the end face has A plurality of inner edges respectively located on the outer periphery of the alignment grooves, the second holding portion also has a first outer arc-shaped chamfering surface, and the first outer arc-shaped chamfering surface is set so that when the second holding portion When the part is inserted into the corresponding alignment groove of the guide hole and touches the corresponding inner edge, the first outer arc-shaped chamfered surface will slide on the corresponding inner edge and be inserted by it direction.

In some embodiments, the screw head further includes a plurality of arc-shaped chamfered surfaces surrounding the first axis at intervals, and each of the arc-shaped chamfered surfaces is located on the corresponding first holding portion and the corresponding first holding portion. Between the alignment groove parts, the second holding part also has a second outer arc chamfer surface opposite to the first outer arc chamfer surface, and the second outer arc chamfer surface is set so that when the first When the two retaining parts are pulled away from the guide hole and contact the corresponding arc-shaped chamfered surface, the second outer arc-shaped chamfered surface will slide on the corresponding arc-shaped chamfered surface and be pulled away by its guidance direction.

The present invention at least has the following effects: the screw has a good anti-theft effect due to the design of the first holding parts of the screw head. In addition, the screw must be used with the screwdriver to perform tightening or loosening operations. Therefore, it can be used in special occasions to meet special usage requirements.

1: screw

11: stud

12: screw head

13: Connection wall

131: stop surface

14: around the wall

140: end face

141: inner peripheral surface

142: Outer peripheral surface

143: The first holding part

144: guide hole

145: card slot

146: holding surface

147: Alignment groove

148: inner edge

149: Arc chamfering surface

15: Pushing the boss

151: hemisphere

152: Outer peripheral surface

2: screwdriver

3: Grip

31: shell

310: half shell

311: head end

312: end

313:Accommodating space

314: pivot joint

315: Ring groove

316: pivot slot

317: pressure surface

32: limit bead

4: Holding arm

41: connecting arm body

410: arm

411: Pivot plate part

412: head end

413: end

414: outer surface

415: storage tank

416: concave curved surface

417: Groove

418: Inner arc chamfering surface

419: abutting edge

420: pressure surface

42: The second holding part

421: force surface

422: The first outer arc chamfering surface

423: Second outer arc chamfering surface

5: elastic ring

A1: First axis

A2: Second axis

D: distance

D1: Insertion direction

D2: pulling away direction

R1, R1': head radial direction

R2, R2': shell radial direction

R3, R3': arm radial direction

T1: the first direction of rotation

T2: Second rotation direction

S1: first direction of rotation

S2: Second direction of rotation

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a three-dimensional exploded view of an embodiment of the combination of a screw and a screwdriver according to the present invention, illustrating the assembly relationship between a screw and a screwdriver; Fig. 2 is an incomplete three-dimensional exploded view of this embodiment; Fig. 3 is an incomplete sectional exploded view of the embodiment; Fig. 4 is a rear view of the screw of the embodiment; Fig. 5 is an incomplete three-dimensional exploded view of the screwdriver of the embodiment, illustrating a The assembly relationship between the grip bar, a plurality of holding arms and an elastic ring; FIG. 6 is a sectional view taken along the VI-VI line in FIG. 1; FIG. 7 is a front view of the screwdriver of this embodiment; Figure 8 is a sectional view of the embodiment, illustrating the retaining arms in a closed state; Figure 9 is a fragmentary sectional view of the embodiment; Figure 10 is a fragmentary sectional view of the embodiment, illustrating the retaining arms The arms are in an unfolded state; and FIG. 11 is a cross-sectional view of the embodiment, illustrating that the holding arms are in the unfolded state, and the plurality of second holding portions hold the plurality of first holding portions respectively.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to Fig. 1, an embodiment of the combination of screw and screwdriver of the present invention, It includes a screw 1 and a screwdriver 2.

Referring to FIG. 2 , FIG. 3 and FIG. 4 , the screw 1 includes a stud 11 and a screw head 12 . The screw head 12 is disposed at one end of the stud 11 and defines a first axis A1 together with the stud 11 . The screw head 12 includes a connecting wall 13 , a surrounding wall 14 , and a pushing post 15 . The connecting wall 13 is connected to the stud 11 and has a blocking surface 131 at an end opposite to the stud 11 . The surrounding wall 14 protrudes from the stop surface 131 of the connecting wall 13 in a direction away from the stud 11 and surrounds the first axis A1 . The surrounding wall 14 has a circular end surface 140 at the end opposite to the stud 11, an inner peripheral surface 141 connected between the end surface 140 and the stop surface 131, an inner peripheral surface 141 connected to the end surface 140 is between the blocking surface 131 and the outer peripheral surface 142 opposite to the inner peripheral surface 141 , and a plurality of first holding portions 143 facing the blocking surface 131 . The surrounding wall 14 is formed with a guide hole 144 that is recessed from the end surface 140 toward the stud 11 to the stop surface 131 and extends along the first axis A1. The guide hole 144 is defined by the inner peripheral surface 141 defined out. The first retaining portions 143 are located on the outer periphery of the guide hole 144 and are equiangularly spaced around the first axis A1. Each of the first holding portions 143 is spaced a distance D from the end surface 140 along the first axis A1, and each of the first holding portions 143 extends along a radial direction R1, R1′ perpendicular to the first axis A1. .

In this embodiment, each of the first holding portions 143 has a locking groove 145 extending outward from the outer periphery of the guide hole 144 along the head radial direction R1, R1' and communicating with the guide hole 144, and The two holding surfaces 146 are respectively located on opposite sides of the slot 145 . Tool Generally speaking, the number of the first holding parts 143 in this embodiment is four as an example, but it is not limited thereto. The number of the first holding parts 143 can also be designed as two, three or More than four. The locking grooves 145 of the two opposite first holding portions 143 extend along the radial direction R1 of the head, and the holding surfaces 146 of each of the first holding portions 143 extend along the other direction perpendicular to the radial direction R1 of the head. One of the heads is spaced apart in radial direction R1' and parallel to each other. The locking grooves 145 of the other two opposite first holding portions 143 extend along the head radial direction R1 ′, and the holding surfaces 146 of each of the aforementioned first holding portions 143 extend along the direction perpendicular to the head radial direction R1 ′ The other heads are spaced apart in radial direction R1 and parallel to each other.

It should be noted that, in this embodiment, each of the slots 145 extends to the outer peripheral surface 142 as an example, so that the slots 145 pass through the surrounding wall 14 . Therefore, the screw 1 is therefore used in the occasion where the screw head 12 can be countersunk. That is to say, after the screw 1 passes through a hole (not shown) of a member to be locked, the hole can accommodate the screw head 12, so that the member to be locked can cover the holes of the screw head 12. Only the end surface 140 and the guide hole 144 are exposed through the engaging groove 145 . In another embodiment of this embodiment, each of the locking slots 145 may not extend to the outer peripheral surface 142 , so that the locking slots 145 do not penetrate the surrounding wall 14 . At this time, the screw 1 can be used not only in the aforementioned occasions where the screw head 12 can be countersunk, but also in the occasions where the screw head 12 can completely expose the surface of the object to be locked without countersinking.

In this embodiment, the guide hole 144 has a plurality of aligning grooves 147 equiangularly spaced around the first axis A1, and the aligning grooves 147 are respectively connected to the The first holding portions 143 are aligned and respectively communicated with the engaging slots 145 . The end surface 140 has a plurality of inner end edges 148 respectively located around the alignment grooves 147 . The surrounding wall 14 also has a plurality of arc-shaped chamfered surfaces 149 equiangularly spaced around the first axis A1. Each of the arc-shaped chamfered surfaces 149 is located between the corresponding first holding portion 143 and the corresponding alignment groove portion 147, and each of the arc-shaped chamfered surfaces 149 is connected to the inner peripheral surface 141 and the corresponding Between the holding surfaces 146 of the first holding portion 143 .

The pushing post 15 protrudes from the blocking surface 131 along the first axis A1 and is located in the guiding hole 144 . The pushing post 15 is a cylinder and has a hemispherical surface 151 opposite to the stop surface 131 , and an outer peripheral surface 152 connected between the stop surface 131 and the hemispherical surface 151 . The length of the pushing post 15 along the first axis A1 is smaller than the length of each of the first retaining portions 143 along the first axis A1 .

Referring to FIG. 2 , FIG. 3 , FIG. 5 and FIG. 6 , the screwdriver 2 is used for inserting into the screw 1 and includes a handle 3 , a plurality of holding arms 4 , and an elastic ring 5 . The handle 3 includes a housing 31 and a limiting bead 32 disposed in the housing 31 . The housing 31 extends along a second axis A2 for being held by a user. The shell 31 has two half-shells 310 arranged in opposite directions and fitted together, and the half-shells 310 are locked together by screw locking. These half-shells 310 of the housing 31 jointly define a head end 311, a tail end 312 opposite to the head end 311 (as shown in FIG. Setting space 313, a plurality of equiangular intervals around the The second axis A2 is located at the pivot portion 314 outside the accommodation space 313 , and an annular groove 315 is communicated with the accommodation space 313 and located between the head end 311 and the pivot portions 314 . The annular groove 315 is used for accommodating a part of the elastic ring 5 .

In this embodiment, each of the pivoting portions 314 has an outer periphery of the accommodation space 313 extending outward along a shell radial direction R2, R2' perpendicular to the second axis A2 and is connected to the accommodation space 313 The connected pivotal groove 316 and two pressing surfaces 317 respectively located on opposite sides of the pivotal groove 316 . Specifically, the number of the pivotal joints 314 in this embodiment is four as an example, but it is not limited thereto. The pivot grooves 316 of the two opposite pivot portions 314 extend along the radial direction R2 of the shell, and the pressing surfaces 317 of each pivot portion 314 extend along the other direction perpendicular to the radial direction R2 of the shell. One such shell radial direction R2' is spaced apart and parallel to each other. The pivot joint grooves 316 of the other two opposite pivot joint parts 314 extend along the shell radial direction R2', and the pressing surfaces 317 of each of the aforementioned pivot joint parts 314 extend along the shell radial direction R2'. The other shell radial direction R2 is spaced apart and parallel to each other.

Referring to FIG. 3 , FIG. 5 , FIG. 6 and FIG. 7 , the retaining arms 4 are disposed on the grip bar 3 and surround the second axis A2 at equiangular intervals and are arranged in a ring shape. The number of the holding arms 4 in this embodiment is four as an example, but not limited thereto. Each holding arm 4 includes a connecting arm body 41 movably connected to the handle bar 3 and partly exposed from the handle bar 3, and a connecting arm body 41 protruding from the outside of the connecting arm body 41 and positioned outside the handle bar 3 for holding Corresponding to the second holding portion 42 of the first holding portion 143 .

The connecting arm body 41 has an arm portion 410 and a pivot plate portion 411 . Should The arm portion 410 extends along the second axis A2 and a part is accommodated in the accommodating space 313 , while the other part protrudes from the head end 311 for insertion into the guiding hole 144 . The cross-sectional shape of the arm portion 410 taken along the direction perpendicular to the second axis A2 is fan-shaped, the arm portion 410 has a head end 412 located outside the housing 31, a tail end 413 opposite to the head end 412, And an arc-shaped outer surface 414 connected between the head end 412 and the tail end 413 . The inner side of the arm portion 410 opposite to the outer surface 414 is recessed to form a receiving groove 415 adjacent to the head end 412 , and the receiving groove 415 is used for receiving a part of the pushing post 15 . The arm portion 410 has a concave arc surface 416 adjacent to the tail end 413 and whose shape matches the shape of the limiting bead 32. The concave arc surface 416 abuts against the outer surface of the limiting bead 32 through surface contact and can Rotate on the outer surface of the limiting bead 32 . The outer surface 414 of the arm portion 410 is recessed to form a groove 417 adjacent to the concave arc surface 416 for accommodating a part of the elastic ring 5 .

The arm portion 410 also has an inner arc-shaped chamfered surface 418 located inside the outer surface 414 and connected to the head end 412 , and two abutting sides 419 respectively connected to opposite sides of the inner arc-shaped chamfered surface 418 . The inner arc-shaped chamfered surface 418 is used for contacting the hemispherical surface 151 of the pushing post 15 and allowing the hemispherical surface 151 to push. The abutting edges 419 are respectively located on opposite sides of the accommodating groove 415, and each of the abutting edges 419 can abut against the outer peripheral surface 152 of the pushing protrusion 15 through line contact and slide on the outer peripheral surface 152. .

The pivot plate portion 411 protrudes outward from the outer surface 414 along an arm radial direction R3, R3' perpendicular to the second axis A2 and is adjacent to the tail end 413. The pivot plate 411 matches the shape of the corresponding pivotal slot 316 and is rotatably pivoted in the corresponding pivotal slot 316 . The pivot plate portion 411 has two pressure-receiving surfaces 420 respectively facing the corresponding pressure-applying surfaces 317 . The pivotal plate portions 411 of the two opposite holding arms 4 protrude along the radial direction R3 of the arm, and the pressure-receiving surfaces 420 of each of the aforementioned pivotal plate portions 411 extend along the radial direction R3 perpendicular to the arm The other arms are spaced apart in radial direction R3' and parallel to each other. The pivotal plate portions 411 of the other two opposite holding arms 4 protrude along the radial direction R3' of the arm, and the pressure-receiving surfaces 420 of each of the pivotal plate portions 411 protrude along the direction perpendicular to the radial direction of the arm. The other arms of R3' are spaced apart in radial direction R3 and parallel to each other. Each of the pressing surfaces 317 of the handle 3 is used to press the corresponding pressing surface 420 to drive the corresponding holding arm 4 to rotate around the second axis A2.

Referring to Fig. 3, Fig. 5 and Fig. 7, the second holding part 42 is a block protruding outward from the outer surface 414 of the arm part 410 along the arm radial direction R3, R3', the second holding part 42 is adjacent to the head end 412 and is located outside the receiving groove 415, the inner arc-shaped chamfered surface 418 and the abutting sides 419, and is used to engage in the engaging groove 145 of the corresponding first holding portion 143. Inside. The second holding portion 42 has two force-applying surfaces 421 respectively abutting against the corresponding holding surfaces 146 . The second holding portions 42 of the two opposite holding arms 4 protrude along the radial direction R3 of the arms, and the force-applying surfaces 421 of each of the second holding portions 42 protrude along the direction perpendicular to the radial direction R3 of the arms. The other arms are spaced apart in radial direction R3' and parallel to each other. The second holding parts 42 of the other two opposite holding arms 4 protrude along the arm radial direction R3', and the force-applying surfaces 421 of each of the second holding parts 42 extend along the vertical direction. The other arm radial direction R3, which is perpendicular to the arm radial direction R3', is spaced apart and parallel to each other.

The second holding portion 42 also has a first outer arc-shaped chamfer surface 422 connected between the force application surfaces 421 and adjacent to the head end 412, and a first outer arc chamfer surface 422 connected between the force application surfaces 421 and The second outer arc chamfer surface 423 opposite to the first outer arc chamfer surface 422 . The first outer arc-shaped chamfer surface 422 is set so that when the second holding portion 42 is inserted into the corresponding alignment groove portion 147 of the guide hole 144 and contacts the corresponding inner edge 148, the first outer The arc-shaped chamfered surface 422 slides on the corresponding inner edge 148 to guide the insertion direction thereof. The second outer arc-shaped chamfer surface 423 is configured such that when the second holding portion 42 is pulled away from the guide hole 144 and contacts the corresponding arc-shaped chamfer surface 149 , the second outer arc-shaped chamfer surface 423 It will slide on the corresponding arc-shaped chamfered surface 149 and be guided by it to pull out the direction.

Referring to Fig. 3, Fig. 6 and Fig. 7, the pivoting plate parts 411 of the holding arms 4 are respectively pivotally connected in the pivoting grooves 316 of the casing 31, so that each holding arm 4 can be relatively The housing 31 is rotated. The pivotal slots 316 can limit the pivotal plate portions 411 to prevent the holding arms 4 from rotating around the second axis A2. The concave arc surfaces 416 of the arm portions 410 of the holding arms 4 abut against the outer surface of the limiting bead 32 , so that the arm portions 410 can hold the limiting bead 32 . Through the limiting bead 32, the parts of the arms 410 adjacent to the tail ends 413 are stretched outward and play a limiting role, so that the parts of the arms 410 adjacent to the tail ends 413 will not interact with each other. contact to keep an appropriate distance, and enable each of the pivot plate portion of the holding arm 4 411 is firmly positioned in the corresponding pivotal groove 316 . Thereby, each of the retaining arms 4 can rotate around the limiting bead 32 with the limiting bead 32 as the rotation center.

The manner in which the casing 31 and the limiting bead 32 are pivotally connected to the holding arms 4 enables the single component of the limiting bead 32 to serve as the rotation center of the holding arms 4 . Thereby, the number of pivoting members required to pivotally connect the holding arms 4 to the housing 31 can be greatly reduced, thereby reducing the complexity of the structure and assembly of the screwdriver 2, and reducing the weight of the screwdriver 2. manufacturing cost.

The connecting arm body 41 of each holding arm 4 is rotatably pivoted between the casing 31 and the limiting bead 32 and can rotate around the limiting bead 32, so that the holding arms 4 can be operated And switch between a closed state (as shown in FIGS. 3 and 7 ) and an expanded state (as shown in FIGS. 10 and 11 ). When the holding arms 4 are in the closed state, the second holding parts 42 of the holding arms 4 are close to each other, and the parts of the arm parts 410 adjacent to the head ends 412 are abutted against each other, so that the The second holding portion 42 can be plugged into the guiding hole 144 . When the holding arms 4 are in the unfolded state, the second holding parts 42 of the holding arms 4 are far away from each other, and the parts of the arm parts 410 adjacent to the head ends 412 are separated from each other, so that the second holding parts 410 are separated from each other. The holding parts 42 can respectively be engaged in the engaging slots 145 to respectively hold the first holding parts 143 .

It should be noted that, in this embodiment, the number of the holding arms 4 is designed according to the number of the first holding portions 143 of the screw 1 . When the number of the first holding parts 143 is designed to be two, three or more than four, the holding arms 4 According to the number of the first retaining portions 143 , the quantity can be correspondingly designed to be two, three or more than four.

The elastic ring 5 is sleeved on the arm portions 410 of the holding arms 4 and accommodated in the grooves 417 and the annular groove 315, so as to apply elastic contraction force to the holding arms 4 so that The retaining arms 4 are kept in the closed state. The elastic ring 5 in this embodiment is made of elastic material such as silicon rubber or rubber. By being accommodated in the grooves 417 and the annular groove 315, the elastic ring 5 can be prevented from sliding on the arms 410 along the second axis A2, and the elastic ring 5 can be prevented from sliding on the arms 410 along the second axis A2. The grip bar 3 is exposed and easily disassembled. Of course, in other implementations of this embodiment, the elastic ring 5 can also be sleeved on the arm portions 410 and adjacent to the second holding portions 42, which is not limited to the method disclosed in this embodiment. .

Referring to Fig. 3, Fig. 8 and Fig. 9, when the screwdriver 2 is to be inserted into the screw 1, firstly, the second retaining parts 42 of the retaining arms 4 are respectively aligned with the guide holes 144. Etc. alignment slot 147. Subsequently, the screwdriver 2 is moved toward the screw head 12 along an insertion direction D1 , so that the second holding portions 42 are respectively inserted into the alignment grooves 147 . When the screwdriver 2 moves along the insertion direction D1, there is a position deviation in the head radial direction R1, R1' (as shown in FIG. 4 ), which causes the first outer portion of one of the second holding parts 42 When the arc-shaped chamfered surface 422 contacts the corresponding inner end edge 148, the component force exerted by the inner end edge 148 on the first outer arc-shaped chamfered surface 422 will push it toward the corresponding inner end edge 148. The alignment groove part 147 slides, and then can guide the first The insertion direction of the two holding portions 42 is such that the second axis A2 is coaxial with the first axis A1. Thereby, the positional deviation of the screwdriver 2 during the insertion process can be absorbed, so as to ensure that the screwdriver 2 can still insert the second holding parts 42 into the alignment grooves 147 under the condition of positional deviation. Inside.

Through the design of the alignment grooves 147 of the guide hole 144, the user can know the positions of the first holding portions 143 and the position of the screwdriver 2 by looking at the alignment grooves 147. Insertion positions of the second holding portions 42 during plugging. Thereby, the user's convenience in the plugging operation can be improved.

Referring to Fig. 9, Fig. 10 and Fig. 11, when the retaining arms 4 move to the position where the inner arc chamfered surfaces 418 contact the hemispherical surface 151 of the pushing boss 15, the inner arc chamfers The corner face 418 is blocked by the hemispherical face 151 . The component force exerted by the hemispherical surface 151 on the inner arc-shaped chamfered surfaces 418 will push the inner arc-shaped chamfered surfaces 418 at the same time, so that the arms 410 are adjacent to the head ends 412 The positions of the holding arms 4 are stretched outwards and the holding arms 4 are respectively rotated around the limiting bead 32 along a first rotation direction T1. The pushing boss 15 simultaneously pushes the inner arc-shaped chamfers 418 by the hemispherical surface 151, which can reduce the complexity of the structure of the pushing boss 15, and increase the compatibility with the inner arc chamfers. The contact area between the angled surfaces 418 enables the pushing post 15 to smoothly push the inner arc-shaped chamfered surfaces 418 , so that the holding arms 4 can smoothly rotate around the limiting bead 32 .

During the rotation of the holding arms 4, through the arm parts 410 respectively Drive the second holding parts 42 to respectively penetrate into the slots 145 of the first holding parts 143 , and stretch the elastic ring 5 outward through the arm parts 410 to deform and accumulate restoring elastic force.

When the holding arms 4 move to the position where the inner arc-shaped chamfered surfaces 418 are separated from the hemispherical surface 151 , the holding arms 4 will no longer rotate. At this time, the second holding portions 42 are engaged in the engaging grooves 145 respectively, and the force application surfaces 421 of each second holding portion 42 abut against the corresponding holding surfaces 146 respectively. Subsequently, the abutting sides 419 of each of the holding arms 4 will abut against the outer peripheral surface 152 of the pushing boss 15 in a line contact manner and slide on it, thereby, the holding arms 4 can be lowered. The frictional force between the arm portions 410 and the pushing post 15 enables the holding arms 4 to move smoothly relative to the pushing post 15 .

When the head ends 412 of the holding arms 4 and the second holding portions 42 abut against the stop surface 131 of the connecting wall 13 and are blocked by the stop surface 131, the screwdriver 2 can no longer Moving along the insertion direction D1 , the pushing post 15 is extended and accommodated in the accommodating grooves 415 of the arm portions 410 . The arm portions 410 are supported by the pushing post 15, so that the retaining arms 4 can be firmly maintained in the unfolded state, so that each second retaining portion 42 can be firmly positioned on a corresponding latch. The locking position in the locking slot 145 (as shown in FIG. 11 ). At this point, the operation of inserting the screwdriver 2 into the screw 1 and holding the screw 1 is completed.

Referring to Fig. 6, Fig. 7 and Fig. 11, when the screwdriver 2 is inserted and held on the After screwing the screw 1, the screwdriver 2 can be rotated along a first rotation direction S1 to drive the screw 1 to rotate for tightening operation, and can be rotated along a second rotation direction S2 opposite to the first rotation direction S1 Turn the screwdriver 2 to make it drive the screw 1 to rotate for loosening. Since the pressure-receiving surfaces 420 of each holding arm 4 are spaced apart and parallel to each other along the radial direction R3, R3' of the arm, and the pressure-applying surfaces 317 of each pivot portion 314 of the housing 31 are along the radial direction R3, R3' Shell radial directions R2, R2' are spaced apart and parallel to each other, therefore, a force exerted by each of the pressure-applying surfaces 317 on the corresponding pressure-receiving surface 420 is perpendicular to the arm portion 410 of the corresponding connecting arm body 41 A force arm jointly constituted by the pivot plate portion 411 and the limiting bead 32 makes the moment value generated by multiplying the active force by the force arm large and can smoothly drive the corresponding holding arm 4 Rotate around the center of the bead 32 . In this way, the screwdriver 2 can be smoothly driven to rotate around the second axis A2 after the user exerts force on the housing 31 .

Referring to Fig. 4, Fig. 7 and Fig. 11, in addition, since the holding surfaces 146 of each of the first holding parts 143 of the screw head 12 are spaced apart and parallel to each other along the head radial direction R1, R1', each The force-applying surfaces 421 of the second holding portion 42 of the holding arm 4 are spaced apart along the radial direction R3, R3' of the arm and are parallel to each other. Therefore, each force-applying surface 421 is applied to the corresponding holding surface 146. An acting force is perpendicular to the corresponding holding surface 146 and the first axis A1, so that a torque generated after the acting force is applied to the screw head 12 can smoothly drive the screw 1 to rotate around the first axis A1. Thereby, the screwdriver 2 can rotate along the first rotation direction S1 or the second rotation direction S2 Drive the screw 1 to rotate smoothly.

Referring to Fig. 3 and Fig. 9, when desiring to extract the screwdriver 2 from the screw 1, pull the screwdriver 2 along a pulling-off direction D2 opposite to the insertion direction D1, so that the retaining arms 4 The second holding portion 42 is away from the blocking surface 131 , and the abutting sides 419 of each holding arm 4 slide on the outer peripheral surface 152 . When the abutting edges 419 move away from the outer peripheral surface 152 and the inner arc-shaped chamfered surface 418 corresponds to the position of the hemispherical surface 151, the reset elastic force accumulated in the elastic ring 5 will drive the holding arms 4 along a The second rotation direction T2 opposite to the first rotation direction T1 (as shown in FIG. 10 ) rotates around the limiting bead 32, so that the parts of the arms 410 adjacent to the head ends 412 shrink and approach, and the inner parts The arc-shaped chamfered surface 418 abuts on the hemispherical surface 151 .

The holding arms 4 will continue to rotate along the second rotation direction T2 with the movement of the screwdriver 2, so that the arm parts 410 respectively drive the second holding parts 42 to gradually move away from the cards. Groove 145. When the screwdriver 2 moves to the position shown in FIG. 9 , the holding arms 4 return to the closed state. After the screwdriver 2 continues to move along the pulling-out direction D2, the second holding portions 42 of the holding arms 4 can move away from the screw head 12 through the alignment slots 147 respectively.

When the screwdriver 2 moves along the pulling-out direction D2, there is a position deviation in the head radial direction R1, R1' (as shown in FIG. When the arc-shaped chamfer surface 423 contacts the corresponding arc-shaped chamfer surface 149, the component force exerted by the arc-shaped chamfer surface 149 on the second outer arc-shaped chamfer surface 423 will be It is urged to slide toward the corresponding alignment groove 147 on the arc-shaped chamfered surface 149, and then the pulling-off direction of the second holding portion 42 can be corrected so that the second axis A2 is coaxial with the first axis A1 . Thereby, the positional deviation of the screwdriver 2 during the pulling-off process can be absorbed, so as to ensure that the screwdriver 2 can still penetrate the second holding parts 42 into the alignment grooves respectively under the condition of positional deviation. 147 and move away from the screw head 12 through the alignment grooves 147 .

Referring to FIG. 3 , FIG. 10 and FIG. 11 , since the first retaining portions 143 of the screw head 12 surround the first axis A1 and are located outside the guide hole 144 , and each of the first retaining portions 143 and the The end faces 140 are spaced apart by the distance D along the first axis A1 and extend along the radial direction R1, R1' of the head. Therefore, the retaining arms 4 of the screwdriver 2 need to first pass through the guide hole when the screwdriver 2 is in the closed state. After 144, push the holding arms 4 from the closed state to the unfolded state by pushing the pushing boss 15 of the screw 1 for example, so that the second holding parts 42 of the holding arms 4 can respectively hold The first retaining portions 143 are used for tightening or loosening the screw 1 . Therefore, those interested in inserting a screwdriver or tool currently on the market into the guide hole 144 of the screw 1 cannot directly interfere with the first holding parts 143, so that the screwdriver or tool cannot turn the screw. 1. In addition, since the end surface 140 of the screw head 12 is circular and is spaced the distance D from the first holding portions 143 along the first axis A1, the end surface 140 can block the screwdriver or tool In order to prevent it from interfering with the first holding portions 143 . Furthermore, the pushing boss 15 of the screw 1 will rise To block the screwdriver or tool on the first axis A1, so as to limit the insertion depth of the screwdriver or tool, to prevent the screwdriver or tool from trying to connect with the first holding part 143 through the rotation angle interfere. Thereby, the screw 1 can have a good anti-theft effect.

On the other hand, by integrally forming the pushing post 15 on the blocking surface 131, a pushing structure for pushing the retaining arms 4 from the closed state to the unfolded state is in place. The design is relatively simple, which can reduce design complexity and manufacturing cost. Since the screw 1 of this embodiment must be used together with the screwdriver 2 of this embodiment to perform tightening or loosening operations, the anti-theft effect can be enhanced and can be applied in special occasions.

It should be noted that the screw 1 and the screwdriver 2 of this embodiment can also have the following different variations according to requirements:

One variation is: each of the first retaining portions 143 can be a block formed inside the surrounding wall 14 , and each of the second retaining portions 42 can form a slot for engaging the block.

Another variation is: the connecting arm body 41 of each holding arm 4 can be connected to the grip bar 3 through a sliding connection.

Yet another variation is: the screw 1 omits the pushing boss 15, and the screwdriver 2 pushes the holding arms 4 through a telescopically movable pushing rod inserted between the holding arms 4 , so that the holding arms 4 can be in the closed state and the expanded state switch between.

Another variation is: the screw 1 omits the pushing boss 15, and the screwdriver 2 drives each of the holding arms 4 to rotate through an electric control motor, so that the holding arms 4 can be in the closed state and Toggle between the expanded states.

To sum up, the screw 1 of this embodiment is designed with the first retaining portions 143 of the screw head 12 , so that the screw 1 can have a good anti-theft effect. In addition, the screw 1 must be used with the screwdriver 2 to perform the tightening or loosening operation, therefore, it can be used in special occasions to meet special usage requirements, so the purpose of the present invention can indeed be achieved.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

1: screw

11: stud

12: screw head

143: The first holding part

145: card slot

146: holding surface

2: screwdriver

3: Grip

310: half shell

311: head end

312: end

4: Holding arm

42: The second holding part

Claims (28)

A screw, comprising: a stud; and a screw head, which is arranged at one end of the stud and defines an axis together with the stud, the screw head includes an end face opposite to the end of the stud, and a plurality of A holding part, the screw head is formed with a guide hole that is recessed from the end surface toward the stud and extends along the axis, the holding parts are located around the guide hole and arranged around the axis at intervals, each There is a distance between the holding part and the end surface along the axis, each of the holding parts extends along a head radial direction perpendicular to the axis, and each of the holding parts has a Each of the retaining parts further has two retaining surfaces respectively located on opposite sides of the retaining groove extending outward and communicating with the guide hole. The screw according to claim 1, wherein the holding surfaces are spaced apart from each other along the radial direction of the other head perpendicular to the radial direction of the head and are parallel to each other. The screw according to any one of claims 1 to 2, wherein the screw head further includes a stop surface between the stud and the holding parts and facing the holding parts, and a protruding surface on the The blocking surface and the pushing post located in the guiding hole. The screw according to claim 3, wherein the pushing post has a hemispherical surface, and an outer peripheral surface connected between the blocking surface and the hemispherical surface. The screw according to any one of claims 1 to 2, wherein the end face is circular. The screw according to any one of claim items 1 to 2, wherein the guide hole There are a plurality of aligning slots surrounding the axis at angular intervals and respectively aligned with the holding parts. The screw according to claim 6, wherein the screw head further includes a plurality of arc-shaped chamfered surfaces surrounding the axis at intervals, each of the arc-shaped chamfered surfaces is located at the corresponding holding portion and the corresponding between the alignment grooves. A screwdriver, comprising: a grip rod extending along an axis; and a plurality of holding arms arranged on the grip rod and angularly spaced around the axis and arranged in a ring shape, each of the holding arms includes a movable A connecting arm body connected to the grip bar and partly exposed from the grip bar, and a holding part protruding from the outside of the connecting arm body and located outside the handle bar. These holding arms can be operated in a closed state and When the holding arms are in the closed state, the holding parts of the holding arms are close to each other, and when the holding arms are in the unfolded state, the holding parts of the holding arms away from each other, the connecting arm body has an outer surface, and a head end located outside the grip bar, the holding part is a block protruding from the outer surface and adjacent to the head end, the holding part has two strength surface. The screwdriver according to claim 8, wherein the outer surface is arc-shaped, the holding part protrudes outward from the outer surface along the radial direction of one arm, and the force-applying surfaces are along the other direction perpendicular to the radial direction of the arm. One arm is radially spaced apart and parallel to each other. The screwdriver as claimed in claim 8, wherein the holding part further has a first outer arc-shaped chamfer at the end opposite to the grip bar, and an outer arc-shaped chamfer opposite to the first The second outer arc chamfer surface. The screwdriver as claimed in claim 8, wherein the connecting arm body has an inner arc-shaped chamfered surface located inside the holding portion. The screwdriver according to claim 11, wherein the connecting arm body is formed with an accommodating groove inside the holding portion, and the connecting arm body further has two abutting sides respectively located on opposite sides of the accommodating groove. The screwdriver according to any one of claims 8 to 12, wherein the connecting arm body of each holding arm is rotatably pivotally connected to the handle, and the screwdriver also includes a set of The connecting arm bodies are provided with an elastic ring that exerts an elastic contraction force thereon. The screwdriver according to claim 13, wherein the handle bar includes a housing, and a limiting bead disposed in the housing, and the connecting arm body of each holding arm is pivotally connected to the housing and the housing in a rotatable manner. between the limiting beads and can rotate around the limiting beads. The screwdriver as claimed in claim 14, wherein the housing forms an accommodation space, and a plurality of pivot joints surrounding the axis at angular intervals and located outside the accommodation space, each of which has a a pivoting groove, the pivoting groove extends radially outward along a shell and communicates with the accommodating space, the connecting arm body has an arm part accommodated in the accommodating space, and a pivoting plate part, The arm portion has a tail end located in the accommodating space, and a concave arc surface adjacent to the tail end and abutted against the limiting bead, the arms of the holding arms are adjacent to the tail ends Stretched outward by the limiting bead to maintain a proper distance, the pivot plate protrudes outward along the radial direction of the arm from the side of the arm opposite to the concave arc surface and is adjacent to the tail end and rotatable Pivoted to the corresponding pivoted groove. The screwdriver according to claim 15, wherein each of the pivot joints also has two pressing surfaces respectively located on the opposite sides of the pivot joint groove, and the pressing surfaces are along the other side perpendicular to the radial direction of the shell. The shells are radially spaced apart and parallel to each other, the pivot plate portion has two pressure receiving surfaces respectively facing the corresponding pressure applying surfaces, and the pressure receiving surfaces are parallel to each other along the radial direction of the other arm perpendicular to the radial direction of the arm. spaced and parallel to each other. A combination of a screw and a screwdriver, comprising: a screw, including: a stud; a screw head, arranged at one end of the stud and jointly defining a first axis with the stud, the screw head includes a On the end face of one end of the stud, and a plurality of first holding parts, the screw head is formed with a guide hole that is recessed from the end face toward the stud and extends along the first axis, and the first holding parts Located on the outer periphery of the guide hole and arranged around the first axis at intervals, each of the first holding parts is spaced from the end surface along the first axis by a distance, and each of the first holding parts is perpendicular to the first One end of the axis extends radially; a screwdriver is used for inserting into the screw and includes: a handle extending along a second axis; and a plurality of holding arms arranged on the handle and surrounding the handle at angular intervals The second axis is arranged in a ring shape, and each of the holding arms includes a connecting arm body that is movably connected to the handle bar and partially exposed to the handle bar, and a connecting arm body that protrudes outside the connecting arm body and is located on the handle bar. The second holding part outside the grip bar, the connecting arm body is used to insert into the guide hole, the second holding part is used to hold the corresponding first holding part, and the holding arms can be operated to Switching between a closed state and an unfolded state, when the holding arms are in the closed state, the second holding parts of the holding arms are close to each other, so that the second holding parts can be plugged into the guide In the hole, when the holding arms are in the unfolded state, the second holding parts of the holding arms are far away from each other, so that the second holding parts can be respectively held on the first holding parts; each of the first holding parts A holding part has a card slot extending radially outward from the guide hole along the head radial direction and communicating with the guide hole, the connecting arm body has an outer surface, and a head end located outside the handle , the second holding portion is a block protruding from the outer surface and adjacent to the head end for locking in the slot of the corresponding first holding portion, and each of the first holding portions also has two There are two holding surfaces respectively located on opposite sides of the slot, and the second holding part has two force-applying surfaces respectively used to abut against the holding surfaces. The combination of a screw and a screwdriver as described in Claim 17, wherein the holding surfaces are spaced apart from each other along the radial direction of the other head perpendicular to the radial direction of the head and are parallel to each other, the outer surface is arc-shaped, and the second holding surface The portion protrudes outward from the outer surface along the radial direction of one arm, and the force-applying surfaces are spaced apart and parallel to each other along the radial direction of the other arm perpendicular to the radial direction of the arm. The combination of a screw and a screwdriver according to any one of claims 17 to 18, wherein the screw head further includes a screw between the stud and the first A blocking surface between the holding parts and facing the first holding parts, and a pushing post protruding from the stopping surface and located in the guide hole, the stopping surface is used to stop the holding parts arm, and the pushing post is used for pushing the retaining arms to transform the retaining arms from the closed state to the unfolded state. The screw and screwdriver combination according to claim 19, wherein the pushing post has a hemispherical surface, and the connecting arm body has an inner arc located inside the second holding part for the hemispherical surface to push Chamfered face. The combination of a screw and a screwdriver according to claim 20, wherein, the connecting arm body is formed with an accommodating groove on the inner side of the second holding part for accommodating a part of the pushing protrusion, and the pushing protrusion The column also has an outer peripheral surface connected between the blocking surface and the hemispherical surface, and the connecting arm body also has two abutting edges respectively located on the opposite sides of the accommodating groove, and each of the abutting edges can pass through the wire The contact means abuts against the outer peripheral surface and slides on the outer peripheral surface. The combination of a screw and a screwdriver according to any one of claims 17 to 18, wherein the screw head further includes a push-out boss located in the guide hole, and the push-off boss is used to push the The holding arms are used to change the holding arms from the closed state to the unfolded state. The connecting arm body of each holding arm is rotatably pivotally connected to the handle bar. The screwdriver also includes a sleeve set on the holding arms. The elastic rings of the arm are connected to the arm body to apply an elastic contraction force thereto. The combination of a screw and a screwdriver as described in claim 22, wherein the grip bar includes a housing, and a limiting bead disposed in the housing, and the connecting arm body of each holding arm is rotatably pivoted to The enclosure and the limit Between the position beads and can rotate around the limit beads. The combination of a screw and a screwdriver as claimed in claim 23, wherein the casing forms an accommodation space, and a plurality of pivot joints surrounding the second axis at angular intervals and located outside the accommodation space, each One of the pivot joints has a pivot joint groove extending radially outward along a shell and communicating with the accommodating space, the connecting arm body has an arm part accommodated in the accommodating space, and A pivotal plate portion, the arm portion has a tail end located in the accommodating space, and a concave arc surface adjacent to the tail end and abutting against the limiting bead, the arm portions of the holding arms The parts adjacent to the tail ends are stretched outward by the limiting beads to keep an appropriate distance, and the pivot plate portion protrudes radially outward along an arm from the side of the arm portion opposite to the concave arc surface and is adjacent to the The tail end is rotatably pivoted to the corresponding pivot slot. The combination of a screw and a screwdriver according to claim 24, wherein each of the pivot joints also has two pressing surfaces respectively located on the opposite sides of the pivot joint slot, and the pressing surfaces are perpendicular to the diameter of the shell The other shell radially spaced apart and parallel to each other, the pivot plate part has two pressure-receiving surfaces respectively facing the corresponding pressure-applying surfaces, and the pressure-receiving surfaces are along the other side perpendicular to the radial direction of the arm. The arms are radially spaced apart and parallel to each other. The screw and screwdriver combination according to any one of Claims 17 to 18, wherein the end face is circular. The screw and screwdriver combination according to any one of claims 17 to 18, wherein the guide hole has a plurality of angles spaced around the first axis and aligned with the positions of the first holding parts respectively Alignment grooves, the alignment grooves are respectively used for a part of the second holding portions inserting, the end surface has a plurality of inner edges respectively located around the alignment grooves, the second holding portion also has a first outer arc-shaped chamfer surface, and the first outer arc-shaped chamfer surface is set to When the second holding part is inserted into the corresponding alignment groove of the guide hole and contacts the corresponding inner end edge, the first outer arc-shaped chamfered surface will slide on the corresponding inner end edge to It guides the direction of insertion. The combination of a screw and a screwdriver according to claim 27, wherein the screw head further includes a plurality of arc-shaped chamfered surfaces surrounding the first axis at intervals, and each of the arc-shaped chamfered surfaces is located at a corresponding Between the first holding portion and the corresponding alignment groove portion, the second holding portion also has a second outer arc chamfer surface opposite to the first outer arc chamfer surface, the second outer arc chamfer surface The curved chamfered surface is set so that when the second holding part is pulled away from the guide hole and contacts the corresponding curved chamfered surface, the second outer curved chamfered surface will be on the corresponding curved chamfered surface Slide up and be guided by it in the direction of extraction.

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