CN103296529B - Disc-type plug-in connector - Google Patents

Abstract

The invention relates to a disc-type plug-in connector. The objective of the invention is to provide the disc-type plug-in connector which can be easily positioned when being assembled into an electronic equipment frame and is low in cost. The disc-type plug-in connector (10) comprises a clamping disc (11) accommodating a memory card (A), a shell (13) inserted in the clamping disc (11), and multiple connection points (14, 14......) protruding towards the interior of a disc insertion part (12) and contacting with signal terminals of the memory card (A) accommodated in the clamping disc (11). The clamping disc (11) comprises a disc body (20) accommodating the memory card (A) and a movable cover body (50) arranged in the disc pulling-out side of the disc body (20) and provided with a front edge cover part (56). When the disc-type plug-in connector (10) is installed onto the electronic equipment frame (C), a cover body (58) is exposed to the outer side surface of the frame (C) by being formed at an exposure hole (59) of the frame (C). The movable cover body (50) is enabled to be combined with the disc body (20) in a manner of being movable in front-back, left-right, and/or up-down directions.

Description

Disc-type plug-in connector

Technical area

The present invention relates to the Disc-type plug-in connector (cardconnector) be connected with the printing wiring substrate electric being equipped on the electronic equipment such as mobile phone or smart mobile phone (smart phone) by the storage card such as IC-card or flash card.

Background technology

In the past, as the exterior storage medium of the electronic equipment such as mobile phone or smart mobile phone, use the storage card such as IC-card or flash card, this storage card and the printing wiring substrate being equipped on electronic equipment, carry out electric connection by card plug-in unit.

In this card plug-in unit, use the Disc-type plug-in connector comprising the chuck can receiving storage card, the shell with the dish insertion section of inserting chuck, the multiple contact contacted to the signal terminal of the outstanding storage card with being accommodated in chuck in dish insertion section and unloading device that chuck is discharged from shell.

The state that this Disc-type plug-in connector is exposed at the lateral surface of electronic equipment framework with the leading edge cap of the pull-out direction side end configuring chuck is installed on electronic equipment, by unloading device, chuck is discharged from shell, outstanding to pull-out direction from the lateral surface of equipment framework, by pulling it further, the relative chuck of storage card can be come in and gone out at electronic device exterior.

As unloading device, possesses rotatably support in the pushing arm of the card plug orientation inboard of shell, by push rod, the square end portion by pushing arm pushes, pushing arm is rotated, inboard edge in another side of arm by chuck is released towards discharge direction, above-mentioned unloading device is known by people (for example, referring to patent documentation 1)

Also have, as other unloading devices, what possess use heart-shaped cam etc. pushes/ejecting mechanism, pushing action by initial card, making chuck remain on institute's allocation of shell, by again pushing, confining force is removed, released towards pull-out direction by release spring, this unloading device is known by people (for example, referring to patent documentation 2).

[patent documentation 1] Japanese Unexamined Patent Publication 2008-108695 publication

[patent documentation 2] Japanese Unexamined Patent Publication 2003-317861 publication

But, in above-mentioned conventional art, the position of leading edge cap opposing electronic device framework is subject to printing the location tolerance both sides impact that the location tolerance of wiring substrate opposing electronic device framework and Disc-type plug-in connector print wiring substrate relatively, the leading edge cap being configured in chuck exterior region and the exposed hole being formed in electronic equipment framework position produce and depart from, there is chuck and insert the danger of extracting and producing undesirable condition, therefore, this installation exercise requires high accuracy, there is very difficult problem, for this reason, in its assembling operation, need high performance assembly mechanical and skilled operator, thus, there is cost and increase problem.

Summary of the invention

So the present invention puts forward in view of the problem existing for this conventional art, its object is to, provides and can easily locate and the Disc-type plug-in connector of cheapness when being assembled into electronic equipment framework.

In order to solve the problem existing for conventional art described above, realize above-mentioned purpose, the present invention proposes following technical scheme:

(1) Disc-type plug-in connector, comprising:

Chuck, storage storage card;

Shell, has the dish insertion section of inserting this chuck; And

Multiple contact, outstanding in above-mentioned dish insertion section, contact with the signal terminal of the storage card being accommodated in above-mentioned chuck;

The feature of described Disc-type plug-in connector is:

Above-mentioned chuck comprises:

Dish body, storage said memory card; And

Movable lid, be configured in the dish pull-out direction side of this dish body, it is provided with leading edge cap, when being installed to electronic equipment framework, by being formed in the exposed hole of this framework, is exposed to framework lateral surface;

Make above-mentioned movable cover physical efficiency all around and/or up and down all directions movably with above-mentioned dish body engagement.

(2), in the Disc-type plug-in connector recorded in technique scheme (1), it is characterized in that:

In either party engagement end portion of above-mentioned dish body or above-mentioned movable lid, be provided with towards the coupling recess of the opposing party's side opening, simultaneously, the engagement projection inserted in above-mentioned coupling recess is provided with in the engagement end portion of the opposing party, between the medial surface and the lateral surface of above-mentioned engagement projection of above-mentioned coupling recess, the gap of forming position adjustment.

(3), in the Disc-type plug-in connector recorded in technique scheme (2), it is characterized in that:

Above-mentioned chuck comprises the shaft-like attachment of either party being bearing in above-mentioned coupling recess or engagement projection, and be located at the insertion through hole for inserting these attachment of the opposing party, between the medial surface and the lateral surface of above-mentioned attachment of this insertion through hole, the gap of forming position adjustment.

The following describes effect of the present invention:

The Disc-type plug-in connector that the present invention relates to comprises as mentioned above: chuck, storage storage card; Shell, has the dish insertion section of inserting this chuck; And multiple contact, outstanding in above-mentioned dish insertion section, contact with the signal terminal of the storage card being accommodated in above-mentioned chuck; Above-mentioned chuck comprises: dish body, storage said memory card; And movable lid, be configured in the dish pull-out direction side of this dish body, it is provided with leading edge cap, when being installed to electronic equipment framework, by being formed in the exposed hole of this framework, is exposed to framework lateral surface; Make above-mentioned movable cover physical efficiency all around and/or up and down all directions movably with above-mentioned dish body engagement; Therefore, the contraposition of the leading edge cap of electronic equipment framework and chuck can easily be made.

Again, in the present invention, in either party engagement end portion of above-mentioned dish body or above-mentioned movable lid, be provided with towards the coupling recess of the opposing party's side opening, meanwhile, be provided with in the engagement end portion of the opposing party the engagement projection inserted in above-mentioned coupling recess, between the medial surface and the lateral surface of above-mentioned engagement projection of above-mentioned coupling recess, the gap of forming position adjustment, therefore, can carry out the contraposition of left and right directions suitably.

Have again, in the present invention, above-mentioned chuck comprises the shaft-like attachment of either party being bearing in above-mentioned coupling recess or engagement projection, and be located at the insertion through hole for inserting these attachment of the opposing party, between the medial surface and the lateral surface of above-mentioned attachment of this insertion through hole, the gap of forming position adjustment, therefore, can carry out the contraposition of fore-and-aft direction and above-below direction suitably.

Accompanying drawing explanation

Fig. 1 (a) is the plane graph representing Disc-type plug-in connector one example that the present invention relates to, and (b) is its ground plan.

Fig. 2 is the skiagraph of Fig. 1 example.

Fig. 3 is the exploded perspective view of this Disc-type plug-in connector.

Fig. 4 is the ground plan representing storage card one example.

Fig. 5 is the ground plan of the chuck represented in Fig. 1.

Fig. 6 (a) is the plane graph representing movable lid one example in Fig. 5, and (b) is its side view.

Fig. 7 is the partial enlargement skiagraph of the movable cap portion representing chuck shown in Fig. 5.

Fig. 8 is the skiagraph of the pull-out action for illustration of the chuck that the present invention relates to, and wherein, (a) is state chuck being accommodated in shell, and (b) is the state pulled out by movable lid.

Fig. 9 is the close-up plan view of the movable cap portion representing chuck when the Disc-type plug-in connector that the present invention relates to being assembled in electronic equipment, and wherein, when (a) represents normal, (b) represents that left and right directions produces and depart from occasion.

Figure 10 is the partial enlargement skiagraph of the movable cap portion of the chuck representing Fig. 9, and wherein, when (a) represents normal, (b) represents up and down and fore-and-aft direction generation departs from occasion.

Figure 11 is the amplification skiagraph of the movable cap portion of another example representing chuck in Fig. 1.

In figure, symbolic significance is as follows:

A-storage card

10-Disc-type plug-in connector

11-chuck

12-card insertion section

13-shell

14-contact

20-dish body

21-leading edge cap

22-card incorporating section

The anti-flake of 24-

25-is fitted together to recess

26-contracting width recess

27-wide cut recess

28-end difference

31-molded shell

32-protective cover

33-avoids window

35-top plate portion

36-side plate

40-stator portion

41-elastic contact chip portion

42-connecting terminal plate portion

The movable lid of 50-

51-coupling recess

52-engagement projection

53-support sector

54-attachment

55-inserts through hole

56-leading edge cap

The horizontal fine strain of millet portion of 57-

58-lid body

59-exposed hole

61-engaging part

70-end difference

71-nail introduction part

Embodiment

Below, the real form of reality of the Disc-type plug-in connector that the present invention relates to is described, in following example, although to inscape with reference to the embodiment shown in Fig. 1 ~ Figure 11, kind, combination, shape, relative configuration etc. has done various restriction, but these only exemplify, the present invention is not limited thereto.

In figure, symbol 10 is Disc-type plug-in connector, and symbol A is the storage card of flash card etc.

This Disc-type plug-in connector 10 comprises the chuck 11 of storage storage card A, there is the shell 13 of the dish insertion section 12 of inserting chuck 11, and to dish insertion section 12 in outstanding, and be accommodated in chuck 11 storage card A signal terminal a1, a1 ... multiple contacts 14 of contact, storage card A is made to be accommodated in chuck 11, pass through chuck 11 insertion dish insertion section 12 in this condition, make the signal terminal a1 of storage card A, a1 ... with corresponding contact 14,14 ... Elastic Contact, makes storage card A be connected by card plug-in unit electric with printing wiring substrate.

Storage card A is such as small-sized shown in Fig. 4 flash card A, long substantially rectangular of the overall length formed compared with the full duration of card, blocking, and in the end of a side in card overall length direction, has compared with other parts, contracting width portion Aa that card width is narrow.

This contracting width portion Aa partially by card Width one side configuration, at the one side of this contracting width portion Aa, towards card overall length direction multiple signal terminal a1, a1 ... arrange side by side at card Width parallel to each other.

Again, at this storage card A, in the end of the Aa opposition side, contracting width portion with card overall length direction, with signal terminal forming surface opposition side, form the thickened section Ab of projecting shape.

Receive the chuck 11 of this storage card A as shown in Figure 5, the movable lid 50 of the flat dish body 20 comprising storage storage card A and the dish pull-out direction side end being configured in dish body 20, dish body 20 and movable lid 50 split are arranged, movable lid 50 is made to be in floating (floating) state on dish body 20, that is, can engage movably towards all around and/or upper and lower all directions.

At this, before and after dish plug orientation is set to by so-called all around and referring to respectively up and down, card plug-in unit Width is set to left and right, card card thickness direction is set to up and down.

Dish body 20 is formed as tabular by insulative synthetic resin, in its one side portion, forms card incorporating section 22, makes the length direction of storage card A towards the storage of dish direction of insertion.

Card incorporating section 22 is consistent with the profile of storage card A, forms the shape that the one side portion of dish body 20 is recessed into, the signal terminal side of storage card A is received towards open side.

Namely, card incorporating section 22 makes contracting width recess 26 and amplification recess 27 form continuous shape, described contracting width recess 26 makes the dish direction of insertion inboard portion of the contracting width portion Aa embedding dish body 20 of storage card A, and described amplification recess 27 configures continuously in the dish pull-out direction side of contracting width recess 26.

Again, at amplification recess 27, form the thickened section end difference 28 embedding thickened section Ab, it is formed as the shape darker than other parts, when storage card A receives towards open side with signal terminal side, the stable state storage that storage card A lies low relatively to coil body 20.

On the other hand, in the side surface part of dish body 20, form the chimeric recess 25 chimeric mutually with the anti-flake 24 being configured at the both sides of coiling insertion section 12, this chimeric recess 25 is embedded in by the mosaic process 24a of anti-flake 24, dish body 20 has high confining force and is locked in shell 13, can confinement plate body 20 along the movement of pull-out direction.

Again, at the dish pull-out direction side end of dish body 20, that is, with the engagement end portion of movable lid 50, be provided with the coupling recess 51 towards movable lid 50 side opening, the engagement projection 52 be provided with at movable lid 50 is inserted in this coupling recess 51.

Coupling recess 51 is provided with a pair support sector 53,53, dish body 20 is at the dish Width of its dish pull-out direction side end, this a pair support sector 53 of formation spaced apart, 53, thus, in the dish pull-out direction end of dish body 20, the rectangular slits shape to movable lid 50 side and body thickness side opening is formed.

Again, coupling recess 51 be formed as wider than the left and right directions width of engagement projection 52 in the medial surface spacing of the mutual subtend of left and right directions, thus, between the medial surface and the lateral surface of engagement projection of coupling recess 51 forming position adjustment gap 62,62.

Using the location tolerance of printing wiring substrate D opposing electronic device framework C and the location tolerance of Disc-type plug-in connector 10 relative printing wiring substrate D etc. as benchmark, determine the gap 62,62 that this position adjusts.

Two support sectors 53,53 form the shape thicker than other part thicknesss of slab of dish body 20, and when chuck 11 is inserted shell 13, support sector 53, dish direction of insertion side end face and shell 13 end face of 53 are abutted against and stop.

Again, in this coupling recess 51, at dish pull-out direction sidepiece, make two supports in two support sectors 53, configure between the medial surface that the shaft-like attachment 54 of 53 are erected at the mutual subtend of coupling recess 51, these attachment 54 insert the insertion through hole 55 being formed in engagement projection 52.

Movable lid 50 as shown in Figure 6, has flexible raw material by insulative synthetic resin or rubber etc. and is formed, and is provided with the engagement projection 52 inserted in coupling recess 51 integratedly, and is configured at the leading edge cap 56 of pull-out direction side end of engagement projection 52.

Engagement projection 52 thickness is identical with support sector 53,53, or is formed thin slightly rectangular-shaped, in its dish direction of insertion end, forms the contracting thick insertion section 52a thinner than other segment thicknesses.

The thick insertion section 52a that contracts is formed as thinner slightly than dish body 20, when chuck 11 is inserted shell 13, becomes the peristome of embedding dish insertion section 12.

Again, in engagement projection 52, be provided with the insertion through hole 55 at dish Width both ends of the surface opening, attachment 54 insert in this insertion through hole 55.

This insertion through hole 55 as shown in Figure 7, is formed as larger than the external diameter of attachment 54, thus, between the medial surface inserting through hole 55 and the lateral surface of attachment 54, and the above-below direction gap 63,63 of forming position adjustment and the gap 64 of fore-and-aft direction.

By the gap 62,63,64 of such forming position adjustment, movable lid 50 can engage with dish body 20 towards all around and up or down, forms floating structure.

Movable lid 50 is formed in the long elongated hole-shape of dish plug orientation by making to insert through hole 55, engagement projection 52 can be inserted between position that the pull-out location of the position of dish direction of insertion inboard of coupling recess 51 and fixed as shown in Fig. 8 (b), the attachment 54 being namely supported in dish body 20 and the dish direction of insertion end inner edge 55a that inserts through hole 55 abut against stop to slide to move in the usual position such as shown in Fig. 8 (a), namely.

Again, in fixed pull-out location, namely, the dish direction of insertion end inner edge 55a inserting through hole 55 be supported in the attachment 54 coiling body 20 and abut against and the position that is stopped, the dish direction of insertion end inner edge 55a of attachment 54 and insertion through hole 55 forms transmission mechanism, masterpiece as fruit tray pull-out direction is used for movable lid 50, so insert the dish direction of insertion end inner edge 55a of through hole 55 towards dish pull-out direction pushing attachment 54, thus, by attachment 54, the power acting on the dish pull-out direction of movable lid 50 is delivered to dish body 20.

Therefore, if catch movable lid 50 to act on certain above pullout forces with two fingers, namely, effect exceedes the power of the confining force of dish body 20 opposite shell 13, then anti-flake 24,24 strain, remove confining force, from dish insertion section 12 pull-out dish body 20, can not use push rod etc., easily pull out chuck 11 from shell 13 and electronic equipment framework C.

Leading edge cap 56 comprises the horizontal beam portion 57 of the elongated plate-like long with the pull-out direction side end shape all-in-one-piece dish Width of engagement projection 52, and be configured in the laminal lid body 58 of dish pull-out direction side in horizontal beam portion 57, when Disc-type plug-in connector 10 is installed to electronic equipment, the dish pull-out direction side surface of this lid body 58, by being formed in the exposed hole 59 of electronic equipment framework C, exposes at framework lateral surface.

Lid body 58 is formed larger than the dish pull-out direction side end face in horizontal beam portion 57, its one side is bearing in integratedly the dish pull-out direction side end face in horizontal beam portion 57, relative level beam portion 57, forms the shape of stretching out into eaves shape.

Again, in the both sides of leading edge cap 56, namely, the both ends in the horizontal beam portion 57 of the dish direction of insertion side of lid body 58, be provided with gomphosis part 61 integratedly, this gomphosis part 61 is chimeric with the medial margin of the exposed hole 59 being formed in electronic equipment framework C, prevents because deadweight etc. makes leading edge cap 56 pull out.

Little by the confining force of the chimeric generation between anti-flake 24 and dish body 20 by the confining force ratio of the chimeric generation between this gomphosis part 61 and exposed hole 59 medial margin.

The outboard end of this gomphosis part 61 is provided with the protuberance heaving into radiused shape integratedly, is configured so that this protuberance is given prominence to laterally from the lateral border of lid body 58.

Shell 13 is by passing through the mold formed molded shell 31 of insulative synthetic resin, and assembling covers in the above and the protective cover 32 of side is formed, on molded shell 31, dish insertion section 12 forms the shape making molded shell 31 recessed above, covers its upper surface portion by protective cover 32.

On molded shell 31, contact 14,14 ... by inlaying shaping, one is assembled into molded shell 31, inboard in the dish direction of insertion of dish insertion section 12, be configured in storage card A one side signal terminal a1, a1 ... contact multiple contacts 14,14 ... in card plug-in unit Width configured in parallel spaced apart.

In figure, symbol 33 is the dish direction of insertion inboards bottom dish insertion section 12, the transverse direction avoidance window forming microscler shape at dish Width in through base plate thickness direction.

On the other hand, protective cover 32 is formed by flat top plate portion 35 with by the side plate 36,36 of the both sides of top plate portion 35 to molded shell 31 lateral buckling shape, and top plate portion 35 is by carrying out punching, bending process formation to conductive metal sheet material.

In the both sides of top plate portion 35, form anti-flake 24,24 by cutting, bending process, by protective cover 32 is assembled into molded shell 31, make two anti-flakes 24,24 be configured in the both sides of dish insertion section 12.

Anti-flake 24 remains folding line portion 24b, being cut into dish plug orientation is long elongated shape, make it form the shape bent from folding line portion 24b to shell 13 private side, with folding line portion 24b for basic point, make dish direction of insertion inboard can to card plug-in unit Width strain.

Again, at anti-flake 24, the engaging teat 24a of arc-shaped outstanding is to the inside formed by bending process, when chuck 11 inserts the dish insertion section 12 of shell 13, by being fitted together to mutually with the chimeric recess 25 of dish body 20 at fixed insertion position engaging teat 24a, the movement of the dish plug orientation of confinement plate body 20 opposite shell 13, thus, even if because the generations such as electronic equipment falls are impacted, chuck 11 also can not be deviate from from shell 13.

Contact 14,14 ... by flexible conductive metal sheet material carries out punching, bending process is formed to having, comprise the stator portion 40 being fixed on molded shell 31, and the elastic contact chip portion 41 in stator portion 40 is supported in towards chuck 11 plug orientation, be integrally constituted.

Stator portion 40 is assembled in bottom molded shell 31 by inlaying shaping integratedly, is laterally avoiding the dish direction of insertion of window 33, and between the inner edge surface being erected at mutual subtend, configuration is fixing.

Again, at inboard contact 14, stator portion 40 and the connecting terminal plate portion 42 that configuration ground extends shape towards dish direction of insertion continuously form one, and the leading section in this connecting terminal plate portion 42 is exposed to the bottom surface of shell 13, is cemented on the connection layout being formed at and printing wiring substrate by soldering.

Elastic contact chip portion 41 to be formed by the edge in the stator portion 40 of giving prominence to from the inner edge of laterally avoiding window 33 to card plug-in unit direction of insertion is inboard and protective cover 32 rolls oblique shape, forms the contact portion 41a of arc-shaped at its leading section.

The Disc-type plug-in connector 10 of such formation is cemented in prints wiring substrate D, in this condition, be arranged on electronic equipment framework C by printing wiring substrate D, described Disc-type plug-in connector 10 is by being formed in the exposed hole 59 of electronic equipment framework C, and leading edge cap 56 is exposed to framework lateral surface.

This exposed hole 59 has concave step portion 70 in framework outer openings edge, and the lid body 58 of chuck 11 embeds this end difference 70, in usual position, lid body 58 is exposed in plane roughly the same with the lateral surface of electronic equipment framework C.

When carrying out this installation, the exposed hole 59 being formed in electronic equipment framework C is subject to printing the location tolerance of wiring substrate D opposing electronic device framework C and the location tolerance both sides impact of Disc-type plug-in connector 10 relative printing wiring substrate D with the position relationship of leading edge cap 56.

But, in the Disc-type plug-in connector 10 that the present invention relates to, movable lid 50 coils body 20 relatively can engage towards all around and the state moved up and down, i.e. quick condition, therefore, departing from of installation site in the design of leading edge cap 56 opposing electronic device framework C and actual installation position can be absorbed, easily can make position consistency.

Such as, normal condition shown in relative Fig. 9 (a), in the relative exposed hole 59 position relative depature of Disc-type plug-in connector 10 under the state in left side, as shown in Fig. 9 (b), dish body 20 relatively, the relative movement of movable lid 50 is to right side, this departs from by the gap 62 of position adjustment, 62 absorb, and relative exposed hole 59, leading edge cap 56 is in suitable position.

Again, normal condition shown in relative Figure 10 (a), Disc-type plug-in connector 10 relatively exposed hole 59 position relative depature under the state of rear side and upside, as shown in Figure 10 (b), dish body 20 relatively, the relative movement of movable lid 50 is to front side and downside, this departs from by the gap 63 of position adjustment, 64 absorb, and relative exposed hole 59, leading edge cap 56 is in suitable position.

In the above-described embodiments, illustrate and be formed in the long elongated hole-shape of dish direction of insertion by inserting through hole 55, by the example of movable lid 50 from the pull-out of dish body, but, also can as shown in figure 11, make to insert the shape that through hole 55 is formed as a circle larger than attachment 54 external diameter.

Again, movable lid coils the connected structure of body relatively, is not limited to above-described embodiment, as long as the structure that movable cover physical efficiency engages movably in all around and/or upper and lower all directions just.

Again, in the above-described embodiments, illustrate that shaft-like attachment are bearing in coupling recess, insert the example that through hole is formed in engagement projection, but the present invention is not limited thereto, also such as shaft-like attachment can be bearing in engagement projection, and insert through hole and be formed in coupling recess.

That carries out when the shape of each several part shown in the above-mentioned example for carrying out an invention and structure are all only and implement of the present invention specializes an example, not because of above-mentioned example limited interpretation technical scope of the present invention.

Claims (3)

1. a Disc-type plug-in connector, comprising:

Chuck, storage storage card;

Shell, has the dish insertion section of inserting this chuck; And

Multiple contact, outstanding in above-mentioned dish insertion section, contact with the signal terminal of the storage card being accommodated in above-mentioned chuck;

The feature of described Disc-type plug-in connector is:

Above-mentioned chuck comprises:

Dish body, storage said memory card; And

Movable lid, be configured in the dish pull-out direction side of this dish body, it is provided with leading edge cap, when being installed to electronic equipment framework, by being formed in the exposed hole of this framework, is exposed to framework lateral surface;

Make above-mentioned movable cover physical efficiency all around and/or up and down all directions movably with above-mentioned dish body engagement.

2., according to the Disc-type plug-in connector recorded in claim 1, it is characterized in that:

In either party engagement end portion of above-mentioned dish body or above-mentioned movable lid, be provided with towards the coupling recess of the opposing party's side opening, simultaneously, the engagement projection inserted in above-mentioned coupling recess is provided with in the engagement end portion of the opposing party, between the medial surface and the lateral surface of above-mentioned engagement projection of above-mentioned coupling recess, the gap of forming position adjustment.

3., according to the Disc-type plug-in connector recorded in claim 2, it is characterized in that:

Above-mentioned chuck comprises the shaft-like attachment of either party being bearing in above-mentioned coupling recess or engagement projection, and be located at the insertion through hole for inserting these attachment of the opposing party, between the medial surface and the lateral surface of above-mentioned attachment of this insertion through hole, the gap of forming position adjustment.