CN201645395U - Improved rapid joint structure - Google Patents

Abstract

The utility model discloses an improved rapid joint structure, which comprises a rod , a first elastic member, a second elastic member, a movable inner cylinder and a hollow sleeve, an inserting slot is arranged in the rod and the first elastic member and the movable inner cylinder are accommodated in the inserting slot, a circular ring arranged along the external diameter of the inserting slot is connected with the edge of the inserting slot to form a ring groove, a fastening trench with a through hole at the outside of the ring groove is fastened by a snap ring with one side in a plane, a pivoting part with a telescoping hole is arranged and one steel bead is accommodated in the pivoting part, the second elastic member and the sleeve are sleeved at the outside of the pivoting part, a ring groove arranged on the inner wall of the sleeve is opposite to the telescoping hole, a fastening groove is arranged on the movable inner cylinder, the rod pushes the first elastic member and the second elastic member by the push or draw out of one or more sizes of screwdriver rods to enable the steel bead to enter into the fastening groove or the positioning ring groove of the screwdriver rods along the ring groove, thus forming the fastening. In this way, the use practicability and convenience and the market demand can be promoted.

Description

The quick coupling structure improvement

Technical field

The utility model relates to a kind of quick coupling structure improvement.

Background technology

As Figure 25, shown in Figure 26, generally be arranged in the joint 20 of screwdriver rod 10, provide the body of rod 21 of a tool telescopic hole 211 in the outside, and in telescopic hole 211 installing one steel ball 22, these body of rod 21 outsides are established a retaining rib 212 of fixing and are set a spring 23 in periphery, one sleeve 24 that is provided with the face of concaving 241 is kept off keeping out of rib 212 and assembles and form, when the screwdriver rod 10 with shaft grooved ring 101 is desired to plug to joint 20, can press and establish sleeve 24 and utilize single spring 23 toward 10 moments of screwdriver rod are pushed, automatically rebound and steel ball 22 is resetted fasten in shaft grooved ring 101 and form the blocking state with spring 23 in telescopic hole 211, but often need push sleeve 24 can connect by spring 23 unidirectional pushing and pressing effects and establish screwdriver rod 10, need again and again push sleeve 24 with screwdriver rod 10 taking-ups or replacing and cause, make to connect that to establish screwdriver rod 10 limited and not quick and inconvenient, and then reduce the market demand.

The screwdriver rod 10 that has at present four kinds of size differences on the market at least, and the design of above-mentioned existing screwdriver rod 10 could be used during only at a kind of or two kinds of close chis, the socket assembling end 11 that causes screwdriver rod 10 1 sides is short of polynary applicability with grooved ring 101 spacings when excessive, does not have a Practical Benefit.

The utility model content

For overcoming above-mentioned defective, the utility model purpose is to provide a kind of practicality, convenience, can promote the quick coupling structure improvement of the market demand.

For achieving the above object, quick coupling structure improvement of the present utility model, it comprises a body of rod, one first, second elastic component, an one movable inner core and a hollow sleeve, establish in an insertion slot is located in first elastic component and movable inner core the inside of the described body of rod, and the external diameter that the prolongs insertion slot limit of establishing an annulus and insertion slot joins and forms an annular groove, the Ka Gou that establishes a tool open-work in the outside establishes the snap ring card that is the plane with a side and establishes, and the articulated section of establishing a tool telescopic hole is installed with a steel ball, and second elastic component and jacket casing are located at the outside, articulated section, it is relative with telescopic hole to establish an annular groove in sleeve lining, establish a clamping groove in movable inner core, this body of rod accepts that more than one size screwdriver rods push or extraction and bullet pushes away first, second elastic component and steel ball form blocking along the positioning ring groove that annular groove enters clamping groove or screwdriver rod.

The outside of the described body of rod is provided with a circular groove relative with Ka Gou one apart from sheathed with the C shape clasp in big footpath and convexedly stretch in the outside and form one first shoulder, and the open-work of Ka Gou is cut to establish and is the plane and communicates with insertion slot, fits in the plane that snap ring is established a plane and card ditch open-work and convexedly stretches in a side of insertion slot.

It is relative with first shoulder of clasp that one end of described sleeve is made as second shoulder, and this second elastic component is subjected to the restriction of first shoulder and second shoulder.

Described movable inner core is established and is hollow form and an end is provided with an inclined-plane, the other end is established a retaining edge that is located in the annulus, this activity inner core wears a fitting, this fitting convexedly stretches in an end of movable inner core and inwall with stair-stepping drop and body of rod forms clamping groove, and the two ends of this fitting respectively are provided with in a magnetic patch and a room be fixedly arranged on an end of the absorption screwdriver rod and first elastic component.

Its outer rim of external diameter that the internal diameter of described movable inner core is slightly less than first elastic component forms a block face and compresses first elastic component.

Further, the improvement of the utility model quick coupling structure, it comprises a body of rod, one first, second elastic component, an one movable inner core and a hollow sleeve, establish in an insertion slot is located in first elastic component and movable inner core the inside of the described body of rod, and the external diameter that the prolongs insertion slot limit of establishing an annulus and insertion slot joins and forms an annular groove, establish a flexible hole establishes with a card pearl card in the outside, and the articulated section of establishing a tool telescopic hole is installed with a steel ball, and establishing a circular groove, to have a clasp of first shoulder with one sheathed, establish a clamping groove in movable inner core, this body of rod accepts that more than one size screwdriver rods push or extraction and bullet pushes away first, second elastic component and steel ball form blocking along the positioning ring groove that annular groove enters clamping groove or screwdriver rod.

The inwall of described sleeve is separated by and one is established with the part external diameter card of card pearl and steel ball apart from respectively establishing a large and small annular groove.

Described movable inner core is established and is hollow form and an end is provided with an inclined-plane, the other end is established a retaining edge that is located in the annulus, wear a fitting in movable inner core, this fitting convexedly stretches in an end of movable inner core and inwall with stair-stepping drop and body of rod forms clamping groove, this fitting be provided with a magnetic patch and a room be fixedly arranged on an end of first elastic component in and the absorption screwdriver rod.

Described movable inner core is established and is hollow form and the outside is established stepped, Yu Yiduan establishes a retaining edge that is located in the annulus, the other end is established an inwall than the section of connecing with an inclined-plane of path and the body of rod and is formed clamping groove, is provided with a magnetic patch and retaining edge inside in the section of connecing and establishes a room to adsorb in screwdriver rod and first elastic component, one end be fixedly arranged on.

The described body of rod is provided with an extension bar end, is arranged with a locating ring in an end of insertion slot, and a side of this locating ring is convexly equipped with the ring wall of a tool magnetic, and it is solid that a sidewall and body of rod end face are inhaled mutually, and this sleeve is subjected to locating ring restriction locking.

Quick coupling structure improvement of the present utility model, establish one in body of rod inside and fit dark insertion slot for a ccontaining elastic component and a movable inner core, and the body of rod is provided with that a telescopic hole is installed with for steel ball and steel ball and protrude from insertion slot, the limit that the external diameter of this insertion slot is established the annulus in an identical footpath and insertion slot joins and forms the annular groove of an arcuation, make movable inner core applying annulus and be subjected to stopping of steel ball and can not drop by insertion slot, when the screwdriver rod that is similar figures with insertion slot pushed, steel ball can be hidden and has a space to annular groove and make things convenient for screwdriver rod to push; Moreover, establish the snap ring of a tool open-work establishes for a snap ring card in the outside of the body of rod, this snap ring is provided with a plane and is scalable in open-work and insertion slot, when using the screwdriver rod of reduced size, the plane of this snap ring can be subjected to a sleeve to force it to fasten in the positioning ring groove of screwdriver rod and obtain the fixedly effect of screwdriver rod, and then promotes practicality, convenience and the market demand on using.

Description of drawings

Fig. 1 is a three-dimensional exploded view of the present utility model.

Fig. 2 is a combination section one of the present utility model.

Fig. 3 is the profile of the utility model insertion slot.

Fig. 4 is a combination section two of the present utility model.

Fig. 5 is a combination section three of the present utility model.

Fig. 6 is user mode figure one of the present utility model.

Fig. 7 is user mode figure two of the present utility model.

Fig. 8 is user mode figure three of the present utility model.

Fig. 9 is the three-dimensional exploded view of another embodiment of the utility model.

Figure 10 is the combination section of Fig. 9.

Figure 11 is the user mode figure of Fig. 9.

Figure 12 is the three-dimensional exploded view of the another embodiment of the utility model.

Figure 13 is the combination section of Figure 12.

Figure 14 is the user mode figure of Figure 12.

Figure 15 is the utility model three-dimensional exploded view of an embodiment again.

Figure 16 is the combination section of Figure 15.

Figure 17 is the user mode figure one of Figure 15.

Figure 18 is the user mode figure of Figure 14 and screw.

Figure 19 is the user mode figure two of Figure 14.

Figure 20 is a torque force device three-dimensional exploded view of the present utility model.

Figure 21 is the combination section of Figure 20.

Figure 22 is torque force device and the transmission tool combinations profile of Figure 20.

Figure 23 is axostylus axostyle of the present utility model and body of rod exploded perspective view.

Figure 24 is the user mode generalized section of Figure 20.

Figure 25 is existing generalized section.

Figure 26 is existing user mode profile.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

As Fig. 1; shown in Figure 2; quick coupling structure improvement of the present utility model; it is by a body of rod 30; one first elastic component 40; one second elastic component 40 '; an one movable inner core 50 and a hollow sleeve 60 are formed; wherein the body of rod 30 has an extension bar end 31 and a hexagonal insertion slot 32 is established in other end inside; and the external diameter that prolongs insertion slot 32 establish an identical footpath annulus 321 just and the limits of insertion slot 32 join form an arcuation annular groove 33 (as Fig. 3; shown in Figure 4); be arranged with a circular groove 34 and a card ditch 35 respectively with sheathed and convexedly stretch in the outside and form one first shoulder 3411 and a snap ring 351 and block mutually and establish for the C shape clasp 341 in big footpath respectively in the appropriate location in the outside at a distance of a suitable section; these card ditch 35 1 sides are cut and are established an open-work 352 that is the plane snap ring 351 that makes a side be plane 3511 that communicates with insertion slot 32 and can be arranged in card ditch 35; then the plane 3511 of snap ring 351 is just scalable in insertion slot 32 inside; between circular groove 34 and card ditch 35, form an articulated section 36; the telescopic hole 361 that the surperficial appropriate location of this articulated section 36 is established arc circle shape communicates with insertion slot 32 and is installed with (as shown in Figure 5) for steel ball 37; this second elastic component 40 ' and sleeve 60 all are sheathed on 36 outsides, articulated section; wherein second elastic component 40 ' is between circular groove 34 and telescopic hole 361; two ends also are resisted against first shoulder 3411 respectively and sleeve 60 1 ends are made as one second shoulder 61; establish an annular groove 62 in sleeve 60 inwalls and be located in fixed bit between the two with the telescopic hole 361 relative steel balls 37 that supply; then the body of rod 30 can be pushed away and flexible slippage by second elastic component 40 ' and the spacing bullet of sleeve 60; in the insertion slot 32 of the body of rod 30, be installed with first elastic component 40 and movable inner core 50 in regular turn; this activity inner core 50 is established and is hollow form and Yu Yiduan establishes a retaining edge 501 that pastes mutually with annulus 321; the inwall of the other end is established an inclined-plane 502; wear two ends in inside and establish the fitting 51 of a magnetic patch 511 and a room 512 respectively; one end of this first elastic component 40 is placed in the room 512 and connects; and fitting 51 also convexedly stretches in an end of movable inner core 50 and has the drop of a spacing and the inwall of the body of rod 30 forms a clamping groove 52; the part external diameter of this steel ball 37 just fastens the retaining edge 501 in movable inner core 50; make movable inner core 50 can be placed in insertion slot 32 inside and unexpected landing; establish a chase 601 in the outer ring surface of sleeve 60 and just the veneers 631 of one end are fitted with chases 601, make sleeve 60 for a cover 63 of moulding that can be heated deflation; but second elastic component 40 ' and clasp 341 are just moulded the protection of cover 63 and are coated on interior and interlock sleeve 60.

As shown in Figure 6, when desire is used, this insertion slot 32 can ccontaining various sizes screwdriver rod 70, the leaning to one side of wherein unidirectional screwdriver rod 71 is provided with a location annular groove 711 and an end, and to establish the spacing of a socket assembling end 712 be A (shortest spacing), when screwdriver rod 71 pushes insertion slot 32, steel ball 37 can be contracted in advance and produce space screwdriver rod 71 convenient and that insertion slot 32 internal diameters are mutually closely connected to the annular groove 33 of annulus 321 and push, and originally being placed in the clamping groove 52 that the steel ball 37 between the annular groove 62 of telescopic hole 361 and sleeve 60 promptly is subjected to screwdriver rod 71 compressions first elastic component 40 to make steel ball 37 enter movable inner core 50 obtains spacing, and the holding that the annular groove 62 of sleeve 60 breaks away from steel ball 37 is subjected to the elastic force of second elastic component 40 ' to push snap ring 351 blockings (as shown in Figure 7) to, force the plane 3511 of snap ring 351 to abut against and be fastened in the positioning ring groove 711 of screwdriver rod 71 and obtain the fixedly effect of screwdriver rod 71 toward insertion slot 32, perhaps, to make steel ball 37 roll into annular groove 62 back blockings spacing along moulding the 63 times pushing sleeve tubes 60 of cover and second elastic component 40 ', making the elastic force bullet of first elastic component 40 push away movable inner core 50 makes screwdriver rod 71 break away from blockings to make things convenient for the user to take out replacement, simultaneously, this socket assembling end 712 is inhaled mutually with the magnetic patch 511 of fitting 51 and unlikely outside ejection is dropped.

As shown in Figure 8, the leaning to one side of this two-way screwdriver rod 72 is provided with a location annular groove 721 and a side, and to establish the spacing of the socket assembling end 722 of a taper be B (long spacing), when screwdriver rod 72 pushes insertion slot 32, steel ball 37 can be contracted in advance and produce a space to the annular groove 33 of annulus 321 and make things convenient for screwdriver rod 72 to push, 502 times crimps 51 in inclined-plane of its socket assembling end 722 and suitable movable inner core 50, the positioning ring groove 721 that makes the steel ball 37 between the annular groove 62 that originally is placed in telescopic hole 361 and sleeve 60 promptly be subjected to screwdriver rod 72 compressions first elastic component 40 to make steel ball 37 enter screwdriver rod 72 obtains spacing, and sleeve 60 is pushed away toward snap ring 351 blockings by the bullet of second elastic component 40 ', force the plane 3511 of snap ring 351 to fasten and obtain the effect of dual strong fix screwdriver rod 72 in the side of screwdriver rod 70, perhaps, along mould cover 63 press down sleeve 60 and second elastic component 40 ' make steel ball 37 roll into annular groove 62 blockings spacing after, but the elastic force bullet that makes first elastic component 40 pushes away positioning ring groove 721 that fitting 51 makes screwdriver rod 72 and breaks away from the blocking of steel balls 37 and be convenient to the user and can detach and then promote rapidity in the use fast, so make the utility model that screwdriver rod 70 windings of multiple different size on the market can be provided, detach use, and then have best practicality.

As Fig. 9; shown in Figure 10; it is sheathed and convexedly stretch in the outside and form one first shoulder 3411 and a card pearl 351 ' Xiang Kashe for the C shape clasp 341 in big footpath that wherein the body of rod 30 ' outside respectively is arranged with a circular groove 34 ' and an above flexible hole 35 '; between circular groove 34 ' and flexible hole 35 ', form an articulated section 36; the telescopic hole 361 that the anchor ring appropriate location of this articulated section 36 is established arc circle shape is installed with for steel ball 37; this second elastic component 40 ' and big annular groove 62 ' of a tool and little annular groove 62 " sleeve 60 be sheathed on a side of clasp 341 and sheathed by extension bar end 31 respectively by articulated section 36; make card pearl 351 '; steel ball 37 is hidden the little annular groove 62 in sleeve 60 respectively " and big annular groove 62 '; establish a chase 601 just fits the veneers 631 of one end for a cover 63 of moulding that can be heated deflation in the outside of sleeve 60 with chases 601; this sleeve 60; second elastic component 40 ' and clasp 341 are also moulded in cover 63 protection is coated on; and the two ends of second elastic component 40 ' then are resisted against first shoulder 3411 respectively and mould cover 63 inside and establish one and make second elastic component 40 ' be deflated state than second shoulder 632 of path; as shown in figure 11; inserting insertion slot 32 when screwdriver rod 71 can take advantage of a situation and push backward and make card pearl 351 ' roll into the positioning ring groove 711 of screwdriver rod 71 and clamping groove 52 that steel ball 37 rolls into movable inner core 50 and obtain the fixedly effect of screwdriver rod 71, another enforcement state of formation the utility model moulding cover 63.

As Figure 12, Figure 13, shown in Figure 14, the external diameter that internal diameter that wherein should activity inner core 50 ' is slightly less than first elastic component 40 makes its outer rim form a retaining edge 501 ' and can compress first elastic component 40 smoothly, and should just paste mutually by retaining edge 501 ', make steel ball 37 be kept off stopping of edge 501 ' and movable inner core 50 ' is limited to the interior difficult drop-offs of insertion slot 32 with the annulus 321 of insertion slot 32.

As Figure 15, shown in Figure 16, the circular groove 34 of this body of rod 30 ' wherein " can be located at that the side near telescopic hole 361 is set as first shoulder 3411 for clasp 341 covers between telescopic hole 361 and the flexible hole 35 '; but and by the sleeve 60 ' of extension bar end 31 sheathed tool ring bodies 63 ' make ring body 63 ' be positioned at a side of telescopic hole 361 and interlock in the body of rod 30 ' outside; and by sheathed second elastic component 40 ' of insertion slot 32 ends; then steel ball 37 is subjected to clasp 341 with ring body 63 ' and spacing between the two; and the end that the two ends of second elastic component 40 ' just are butted on first shoulder 3411 and sleeve 60 ' is established second shoulder 601 ' than path; this activity inner core 50 " the outside establish the retaining edge 501 that stepped and Yu Yiduan formation one and annulus 321 paste mutually ", the other end forms a section of connecing 51 than path " and have a clamping groove 52 " establish for steel ball 37 cards, when sleeve 60 ' back pushes compression second elastic component 40 ', steel ball 37 is promptly by movable inner core 50 " clamping groove 52 " be rolled to the inwall of sleeve 60, and card pearl 351 ' rolls into the positioning ring groove 711 of screwdriver rod 71, perhaps, steel ball 37 is by movable inner core 50 " clamping groove 52 " roll into the positioning ring groove 721 of screwdriver rod 72, and the effect that obtains to fix various screwdriver rod 70 forms the utility model enforcement state again.

End in insertion slot 32 is arranged with a locating ring 80, the ring wall 81 that one side of this locating ring 80 is convexly equipped with a tool magnetic is inhaled admittedly itself and the end face of the body of rod 30 ' mutually, make sleeve 60 ' be subjected to the restriction locking bit (as shown in figure 17) of locating ring 80, its steel ball 37 was positioned between telescopic hole 361 and the sleeve 60 ' inwall after then screwdriver rod 71 was inserted, this screwdriver rod 71 promptly is not subjected to the blocking of steel ball 37 and movable stretching in insertion slot 32, when the screw D that one end is the plane as the user pastes mutually with screwdriver rod 71 (as shown in figure 18), screwdriver rod 71 contracts promptly and makes the smooth suction of screw D be fixed in the ring wall 81 of locating ring 80, with this, the utility model promptly is not subjected to the difference of screw D size and need not to replace again and again the screwdriver rod 70 of different size, and when locating ring 80 does not use, can be by the body of rod 30,30 ' extension bar end 31 is inserted in, and has the effect (as shown in figure 19) of taking in locating ring 80.

As Figure 20, shown in Figure 21, this body of rod 30 wherein " can match with a torque force device 90; this torque force device 90 is by a shell block 91; axostylus axostyle 92; one changes part 93; positioning piece 94 and a upper shield 95 are formed; extend a hexagonal extension bar 911 in a side center of shell block 91 and be nested with location (as shown in figure 22) for the hexagonal running-on of transmission instrument C, the storage tank 912 that opposite side forms a center tool projection 913 and a side of axostylus axostyle 92 are set as pushing block 921 hub settings of a tool shrinkage pool 922, and establish one relatively in the periphery of storage tank 912 and be connected a piece 914 and a limited mouth 915, be arranged with a groove 9141 in the edge that is connected piece 914, in the opposite side of axostylus axostyle 92 in conjunction with the body of rod 30 " (as shown in figure 23); change part 93 and establish an arc pushing block 931 and a limited mouth 932 relatively in a side; opposite side along ora terminalis establish relatively a tool guide margin 934 lug boss 933 and in be formed centrally one and promote space 935; and a trepanning 936 and axostylus axostyle 92 mutually sheathed being butted on the pushing block 921 are established in the center; keeper 94 is established the wing piece 941 of a tool groove 9411 relatively in a side; opposite side extend a tool groove 9421 ring section 942 and in to be formed centrally a trepanning 943 mutually sheathed with axostylus axostyle 92, make the both wings piece 941 proper hub settings of keeper 94 be limited in two limited mouths 932 that change part 93 and keep out in two pushing blocks, 931 limits, and be arranged in the storage tank 912 of shell block 91, the groove 9411 of wing piece 941 just is connected mutually with the groove 9141 that is connected piece 914, be nested with the location by a C type clasp 97, making changes part 93 and can be positioned 94 of shell block 91 and keepers, and in keeper 94 and change 93 groups of part and establish a spring 96, make two pushing blocks 931 that change part 93 can be subjected to the bullet of spring 96 to push away effect projection and going out outside storage tank 912 down, upper shield 95 is established an eluding groove 951 in the inwall both sides change the pushing block 931 of part 93 for dodging, and upper shield 95 centers are established a trepanning 952 and are sheathed on axostylus axostyle 92 and combine with shell block 91, and the trepanning 952 that the ring section 942 of keeper 94 just protrudes in upper shield 95 matches with a C type clasp 97 ' to be placed on and forms the location in the groove 9421, when torque force device 90 is assembled on the transmission instrument C, make the body of rod 30 " to plant mutually (as shown in figure 24) when carrying out the screw lock operation with various screwdriver rod 70; effect that the pushing block 921 of axostylus axostyle 92 can be subjected to spring 96 is down and spacing the action in the promotion space 935 of changeing part 93; and meet barrier and when continuing screw lock under screwdriver rod 70 is subjected to the high speed rotating of transmission instrument C; axostylus axostyle 92 just produces recoils and makes spring 96 its pushing blocks 921 of pushing and pressing; make pushing block 921 pushed by the bullet of spring 96 and slide onto lug boss 933 along guide margin 934 to form continuous idling conditions, continues to be subjected to the moment of transmission instrument C to cause distortion under the torsion or the situation damaged and reach the function that idle running is protected to prevent screwdriver rod 70.

In sum, the utlity model has breakthrough structure, the technology contents of improvement can reach the practicality and creativeness on the industry again, and the utility model is not seen any open, have novelty, meet the regulation of Patent Law, propose utility application in accordance with the law.

The above only is embodiment of the present utility model, can not be used for limiting the scope that the utility model is implemented; All equalizations of being done according to the utility model claim change and modify, and all belong in the scope that the utility model contains.

Claims (10)

1. quick coupling structure improvement, comprise a body of rod, one first, second elastic component, an one movable inner core and a hollow sleeve, it is characterized in that: establish in an insertion slot is located in first elastic component and movable inner core the inside of the described body of rod, and the external diameter that the prolongs insertion slot limit of establishing an annulus and insertion slot joins and forms an annular groove, the Ka Gou that establishes a tool open-work in the outside establishes the snap ring card that is the plane with a side and establishes, and the articulated section of establishing a tool telescopic hole is installed with a steel ball, and second elastic component and jacket casing are located at the outside, articulated section, it is relative with telescopic hole to establish an annular groove in sleeve lining, establish a clamping groove in movable inner core, this body of rod accepts that more than one size screwdriver rods push or extraction and bullet pushes away first, second elastic component and steel ball form blocking along the positioning ring groove that annular groove enters clamping groove or screwdriver rod.

2. quick coupling structure improvement as claimed in claim 1, it is characterized in that: the outside of the described body of rod is provided with a circular groove relative with Ka Gou one apart from sheathed with the C shape clasp in big footpath and convexedly stretch in the outside and form one first shoulder, and the open-work of Ka Gou is cut to establish and is the plane and communicates with insertion slot, fits in the plane that snap ring is established a plane and card ditch open-work and convexedly stretches in a side of insertion slot.

3. quick coupling structure as claimed in claim 1 or 2 improvement is characterized in that: it is relative with first shoulder of clasp that an end of described sleeve is made as second shoulder, and this second elastic component is subjected to the restriction of first shoulder and second shoulder.

4. quick coupling structure improvement as claimed in claim 1, it is characterized in that: described movable inner core is established and is hollow form and an end is provided with an inclined-plane, the other end is established a retaining edge that is located in the annulus, this activity inner core wears a fitting, this fitting convexedly stretches in an end of movable inner core and inwall with stair-stepping drop and body of rod forms clamping groove, and the two ends of this fitting respectively are provided with in a magnetic patch and a room be fixedly arranged on an end of the absorption screwdriver rod and first elastic component.

5. quick coupling structure as claimed in claim 1 improvement is characterized in that: its outer rim of external diameter that the internal diameter of described movable inner core is slightly less than first elastic component forms a block face and compresses first elastic component.

6. quick coupling structure improvement, comprise a body of rod, one first, second elastic component, an one movable inner core and a hollow sleeve, it is characterized in that: establish in an insertion slot is located in first elastic component and movable inner core the inside of the described body of rod, and the external diameter that the prolongs insertion slot limit of establishing an annulus and insertion slot joins and forms an annular groove, establish a flexible hole establishes with a card pearl card in the outside, and the articulated section of establishing a tool telescopic hole is installed with a steel ball, and establishing a circular groove, to have a clasp of first shoulder with one sheathed, establish a clamping groove in movable inner core, this body of rod accepts that more than one size screwdriver rods push or extraction and bullet pushes away first, second elastic component and steel ball form blocking along the positioning ring groove that annular groove enters clamping groove or screwdriver rod.

7. quick coupling structure as claimed in claim 6 improvement is characterized in that: the inwall of described sleeve is separated by and one is established with the part external diameter card of card pearl and steel ball apart from respectively establishing a large and small annular groove.

8. quick coupling structure improvement as claimed in claim 6, it is characterized in that: described movable inner core is established and is hollow form and an end is provided with an inclined-plane, the other end is established a retaining edge that is located in the annulus, wear a fitting in movable inner core, this fitting convexedly stretches in an end of movable inner core and inwall with stair-stepping drop and body of rod forms clamping groove, this fitting be provided with a magnetic patch and a room be fixedly arranged on an end of first elastic component in and the absorption screwdriver rod.

9. quick coupling structure improvement as claimed in claim 6, it is characterized in that: described movable inner core is established and is hollow form and the outside is established stepped, Yu Yiduan establishes a retaining edge that is located in the annulus, the other end is established an inwall than the section of connecing with an inclined-plane of path and the body of rod and is formed clamping groove, is provided with a magnetic patch and retaining edge inside in the section of connecing and establishes in a room is fixedly arranged on an end that adsorbs the screwdriver rod and first elastic component.

10. quick coupling structure improvement as claimed in claim 6, it is characterized in that: the described body of rod is provided with an extension bar end, end in insertion slot is arranged with a locating ring, one side of this locating ring is convexly equipped with the ring wall of a tool magnetic, one sidewall is inhaled admittedly mutually with the end face of the body of rod, and this sleeve is subjected to locating ring restriction locking.

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