CN2419326Y - Embedded lock with axical balls and hiding core with variable keys - Google Patents

Abstract

The utility model relates to an embedded lock with an axial marble of a key variable hidden core, which is a mechanical lock for theft protection of various doors and cabinets. The lock core with the marble of the utility model is hidden by the peripheral components; the direction that the marble can move is in parallel with the axial line of the lock core. The utility model can and needs the concave-and-convex key teeth arranged on the end surface to push the marble to limit the lock core to unlock the lock, and therefore, the shape and the effect of the utility model are similar to the common marble embedded lock head, and whereas, the utility model does not have a key hole, and thereby, the thief is difficult to drill, pull, and copy the structure situation of the marble. The adoption range of the marble position arrangement is enlarged to multiple models; the sheet-shaped key which is copied is embedded to the outer end surface to extend into teeth by key nails, and therefore, the tooth-shaped ranging can present multiple types. One single key can also unlock a plurality of locks in the same types, and whereas, the thief is difficult to get the key and identify the key to use, and thereby, the security theft protection performance of the lock can be greatly increased, and the trouble due to multiple keys can be reduced.

Description

The latent mandrel of variable key is to the pellet shot from a slingshot built-in lock

The utility model is that mouthful frame for movement cylinder lock set (containing key) of normal security personnel's usefulness is applicable to all kinds of doors, cabinet, drawer, and mounting method is similar to general built-in lock.

Along with the accumulation of people's wealth and the demand of private-hide-right, the performance of lockset improves day by day, but does not now see that the person still has weak point:

1. better performances is all more expensive, and some mechanical cylinder lock is hundred yuan of every mistakes also.And senior types such as electronics, magnetic card is just more expensive, and should not influence with key string band etc. by power supply reliability or keycard and fail to popularize.So be still cylinder lock so far uses more.

2. the cylinder lock of now seeing is provided with the keyhole with lock core shaft's line parallel mostly, easily by the thief therefrom bore dial or seal imitative.If bore damage keyhole groove line and pellet shot from a slingshot with sharp tough thin hinge, then no matter how exquisite this lock is, all is easy to into the robber.If there is the playboy to wait with foreign matter filling keyhole, then the user is also difficult opens.

3. lock mostly essential ad hoc key for every, all normal body of a lot of people is hung a hectogram and is weighed above key.Even have people's key too many, drive what lock with to the utmost point difficult what spoon of differentiating.

The purpose of this utility model is newly to create a kind of " the latent mandrel of variable key is to the pellet shot from a slingshot built-in lock ".Its key is to open the same kind lock that many handles are contained in difference by modulation thread form style; Its lock core is being concealed by other part bag.Can prevent that drilled group is emitted imitative unblanking.The moved direction of its pellet shot from a slingshot is parallel to the lock core axis, and number is more, is all being screened by other part again, and extremely difficulty is seen outside lock, thereby forms a kind of new-type frame for movement lockset.

The existing common frame for movement lockset of the utility model contrast has following beneficial effect:

1. because of key can remove the modulation thread form by user intention, can spoonfully drive many locks, so can reduce the tired debt of key; When if the robbery gets spoon, difficultly also know the thread form pairing and unblanks, so strengthened theftproof; If the user is modulation key thread form not, just think spoonful opening a lock time spent, still have following advantage.

Because of its lock core wrapped latent, so can strengthen tamper-proof power.

3. because of its pellet shot from a slingshot is axially movable, can has and lay more pellet shot from a slingshot (following embodiment just has 9 groups of above pellets shot from a slingshot, and generally other cylinder lock has only 4 to 6 groups) so can strengthen confidentiality than multiposition; And when unblanking, axial pellet shot from a slingshot and the little relative friction in key contact position are bigly avoided so can reduce because of wearing and tearing were lost efficacy lock, and key need not stressed turning, and can prevent twisting into two parts or being out of shape convenient the use.

4. because of axial pellet shot from a slingshot hole more easily processes, and need not to establish and unmanageable groove line keyhole is arranged, so can reduce cost.

The utility model is achieved in that lock core is still such with the built-in lock of now seeing, is columniform, but very flat, and is concealed in tapered end by bag entirely and do not expose.Key is then mainly by a disk like coin, and establishes a plurality of apertures, inserts to be packed with the short different spoon nail of many grain lengths and to form required thread form again.If thread form is right, then can push away this spoon sheet and allow each spoon ailhead be pressed into from each pellet shot from a slingshot hole clipping of tapered end outer face, just can be being contained in all the align contact interface of tapered end and lock core of many outer pellets shot from a slingshot and the corresponding contact surface of many pellets shot from a slingshot in being contained in lock core in the tapered end.At this moment twist lock core by axle, just can stir dead bolt and unblank.If changed slotting clamped the putting of the spoon nail on the key sheet, then the thread form style of key has just changed, and can not drive this lock again.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof:

Fig. 1 contains the assembling drawing that locking cam is stopped according to the latent mandrel of variable key that the utility model provides to the pellet shot from a slingshot built-in lock, and imagination is drawn after dissecing perpendicular to ground and by the plane of lock core axis, indicates the sequence number of [1] to [23] relevant zero object among the figure.

Fig. 2 is the part drawing of axle [1], indicates [31] to [33] sequence number among the figure, and the functional part of explanation is arranged hereinafter in addition.Fig. 3 is that the A-A of Fig. 2 is to view.Fig. 4 is that the B-B of Fig. 2 is to view.

Fig. 5 is the part drawing of knob [2], indicates [34], [35] sequence number among the figure, and the functional part of explanation is arranged hereinafter in addition.Fig. 6 is that the C-C of Fig. 5 is to view.

Fig. 7 is the part drawing of a spoon lid [5].Fig. 8 is the left view (complete section) of Fig. 7.

Fig. 9 is the part drawing of spoon lid [6], indicates [36] to [38] sequence number among the figure, and the functional part of explanation is hereinafter arranged in addition.Figure 10 is the left view (complete section) of Fig. 9.Figure 11 is the vertical view of Fig. 9.

Figure 12 is the component diagram of a spoon plate [7], indicates [39] to [45] sequence number among the figure, and the functional part of explanation is hereinafter arranged in addition.Figure 13 be the E-E of Figure 12 to partial view, Figure 14 is that the D-D of Figure 12 is to view.

Figure 15 is the part drawing of spoon nail [8], and [46], [47] sequence number are arranged among the figure, and the functional part of explanation is hereinafter arranged in addition.Figure 16 is the right view of Figure 15.

Figure 17 is the part drawing of a spoon box [9], indicates [48] to [53] sequence number among the figure, and the functional part of explanation is hereinafter arranged in addition.Figure 18 is that the F-F of Figure 17 is to view.

Figure 19 is the part drawing of tapered end [11], indicates [54], [55] sequence number among the figure, and the functional part of explanation is hereinafter arranged in addition.Figure 20 be the G-G of Figure 19 to view, indicate [56] to [60] sequence number among the figure, the functional part of explanation is hereinafter arranged in addition.

Figure 21 is the part drawing of lock core [13], indicates [61], [62] sequence number among the figure, and the functional part of explanation is hereinafter arranged in addition.Figure 22 be the I-I of Figure 21 to view, indicate [63], [64] sequence number among the figure, the functional part of explanation is hereinafter arranged in addition.

Figure 23 is the part drawing of tail-hood tongue [16].Indicate [66] to [69] sequence number among the figure, the functional part of explanation is hereinafter arranged in addition.Figure 24 is the right view of Figure 23, indicates [65] sequence number among the figure, and the functional part of explanation is hereinafter arranged in addition.

Figure 25 is the part drawing of lock tube [20], indicates [70] among the figure to [73] sequence number, and the functional part of explanation is hereinafter arranged in addition.Figure 26 is that the J-J of Figure 25 is to view.

And the lock box that is contained in the door-plate is identical with the common structure of common door lock with dead bolt, and this example is tired again to be stated (upper and lower with).Under address that any same sequence number all refers to unique implication among each figure, each figure ratio is 2: 1, and (amplification) sequence number in Fig. 1 is represented:

[1] be axle (referring to Fig. 2), be made of a steel thick, in, three sections cylinder disjunctors of children.Its children's section is reserved outside the 5mm, makes screw thread [31] from the termination.Size cooperates as follows.

[2] be knob (referring to Fig. 5), available iron causes big circular slice [34] band to connect the revolving body of roundlet shell of column, bores central stepped again.Closely [34] one stomidiums footpath cooperates with the thick intersegmental crack of [1], and both are isometric.The long 1.5mm of another stomidium, the aperture is than the big 0.5mm in the stage casing of [1].

[1] assembly method to [4] is: the hole of axle [1] being inserted in knob [2] becomes matched in clearance, and allows the end face [35] in hole and the shaft shoulder [33] be adjacent to, and the large end face of axle [1] is cut to concordant with the outer end of [34].Get out pin-and-hole at both intersections again.And the straight pin of packing into [4] (also getting matched in clearance).The enclosing cover made from iron sheet [3] (old, but also multilayer) at last, the periphery of [34] in the riveting embedding, and then family of four closes, and difficult tearing open taken off.[4] pin length should be shorter slightly than [1] thick section.

[3] be the lid of [2], hat should make the about 4mm of interior identity distance [2] of central protruding cap after causing.

Key is to constitute whole one by [6], [7], [8].

[6] be key lid (referring to Fig. 9), [7] are that a spoon plate (referring to Figure 12), [8] are spoon nails (referring to Figure 15), and they all can be become by the iron and steel stamping-out, and wherein [6] should be able to have than ferromagnetism.

[6] become uniform thickness class square sheet, have " ∩ " groove [37] along brachymedial alignment bottom in center.When groove should be able to horizontal sticker [1] stage casing, allow [6] and [7] to the heart.[6] short long nick is established to dodge the curved button of [7] in top.[6] four jiaos of symmetries left, stretch out clubfoot [38] outside the right.[38] should near and be parallel to upper and lower limit and can not surpass the limit.[38] should be concordant to antecurvature protruding amount with the thickness of the ailhead [46] of [8].

[7] become the class square sheet of uniform thickness, and establish and groove [44] that [37] are same.[7] bend for four jiaos and establish four little hooks [41], make [6] and upward make [38] when fork clip is gone into hook certainly, make the alignment of [37] and [44] two grooves and limit, place.[7] bore ten φ 1.5mm holes [42] around groove [44] first half.[42] to ten hole [53], [60] and [62] all be arranged to the heart with following [9], [11] and [13].Guarantee these ten groups the limit, hole, every place in totally 40 holes any limit spacing of place part is no less than 1.5mm and assurance [7], [9], [11] and [13] four to heart prerequisite under, ten groups of holes can be along certain circular arc distribution, but also flexible distributed.Form this lock with thing utmost point polytypic is arranged.[7] curved button is established towards [41] coplanar in top.Compressing tablet [39] is the annex of [7], and iron causes strip sheet shape, along center line have elongate slot and allow the top of [7] curved detaining inseparable, again can relative translation.[39] gear [45] is set protruding time in two ends, with can be fashionable at [6] and [7] cover, moves on the last gear [36] that is pressed in [6].[39] end wherein extends slightly and curves portable curved hole [40], and [40] can curve the position shape that does not hinder the lock performance at random.

[6] and behind [7] fit should be parallel to each other as far as possible, smooth.

[8] become totally ten of column cap spikes.Its post ailhead [46] diameter phi 3mm, nail bar φ 1.5mm, nail tail [47] has been located chamfering.[8] dimensional accuracy overlays not askew pendulum in the time of should making it fill up [42] hole relief [6] fit [7] of [7] as far as possible, makes [6], [7], [8] armrest of being not difficult split again.[8] length can become many groups by poor in batches about 0.2mm.

This key should also be not difficult to make try one's best strong and unyielding small and exquisite, smooth, attractive in appearance.Their assembling way is: in ten apertures [42] on [7], insert spoon nail [8] with interference fits earlier, and order spoon nail tail [47] stretches out towards little hook [41] place end face.The length of ten spoon nails [8] should have nothing in common with each other, and forms the tooth shapes style to satisfy.Compress spoon lid [6], and manage to make its four clubfoots [38] to snap in four little hooks [41] on a spoon plate [7] angle.At last the compressing tablet [39] (available iron plate is washed into, and is to separate with [7]) that is fastened in a spoon plate [7] top is drawn towards the sensing of D, allow its down gear [45] push down spoon lid [6] a last gear [36] also the energy self-locking get final product.Curved hole [40] gives over to other keys and goes here and there band simultaneously, because of it is subjected to pulling force more, can reduce the possibility that unclamp gear [45] and [36].

[9] be the rammed spoon of iron plate box (referring to Figure 17), can produce seam again by two of different hatchings among Figure 18 respectively and become (the weldering latter should be worked into requirement described herein, together following).[9] be left and right symmetry, wherein circular arc is cut on [48] that side square shape sheet and upper and lower limit of being uniform thickness, and two big planes should not have salient point and distortion.Opposite side is to be short channel steel shape, and notch is to accurate top circular arc, and the limit that [44] groove is arranged [43] of base Ying Zaiyu [7] guarantees that [6], [7] and [9] centering develop when pasting in the channel-section steel, and the both sides of groove do not contact with [7] etc.[9] planar central porose [49], the aperture cooperates with the young intersegmental crack of [1]; To under φ 3mm rivet hole [50] is arranged, line length 5.5mm and perpendicular to the following end in the channel-section steel at place again connects with the heart in two holes.The hole [53] that ten φ 1.6mm are arranged around in [49] hole.End face [48] can be pressed close to door-plate [21], in case lock body is inwardly evaded, hole [49] stick the path section shaft shoulder [32] of [1], prevent to move in [1].

[5] be a spoon lid, iron uniform thickness square sheet shape has the macropore than the big 0.5mm of external diameter of the small column of [2] on the center line.In the time of should making [5] to become box with [9] weldering or riveted, this macropore and [9] are to the heart.This box is upwards kept the slit that the channel-section steel opening by [9] forms, should guarantee [7] together with [6] along seam when slipping into can with [9] to the heart.Box thick should with [1] stage casing equal in length.

[10] be that outer pellet shot from a slingshot is that φ 2mm is cylindrical, an end band 0.2mm * 45 ° of chamferings wherein.Its length should≤thickness of [11], and poor in batches about 0.2mm and each group [8] are matched.

[11] being tapered end (referring to Figure 19) is that oblate cylindricality, the length of thickness 〉=[10], external diameter form [55] external cylindrical surface and become interference fits with tapered end cover [20] endoporus, and its ten through holes of nearly outer periphery [60] are all with the matched in clearance outer pellet shot from a slingshot [10] of packing into.[10] and [11] can all make with copper.[54] be the centre bore that becomes matched in clearance with axle [1] children section.Not with [60] hole interference place establish a rivet hole [57] guaranteeing each hole parallel and with each hole centering prerequisite of [9] under, [57] should join work with the hole [50] of [9].[60] aperture φ 2mm.

[5], the assembly method of [9], [11], [23] is: use rivet [23] spoon box [9] and tapered end [11] riveting jail earlier; And notice that [59] locate to adopt the countersunk head riveting, and can not protrude from end face.(rotating flexibly in axle [1] the cover hand-hole [54]) again the end face [52] of spoon lid [5] (iron plate is washed into, referring to Fig. 7) and spoon box [9] but just adult is pasted in weldering or riveting, anti-thief tears lock open outside door-plate.

[14] be little spring, use the rectangular of φ 0.3mm spring steel wire coiled external diameter 1.9mm, when the time comes as required with intercepting suitable length and flattening two ends.

[12] be interior pellet shot from a slingshot, it is cylindrical that copper is made φ 2mm, an end band 0.2mm * 45 ° of chamferings.Length is unified.Do together when [11] being assembling with the hole of holding screw [22] of [20] location.

[13] be the oblate cylindricality lock core (referring to Figure 21) that copper is made, its external diameter [61] is the external cylindrical surface that becomes matched in clearance with tapered end cover [20] endoporus, thickness than [12] long 2 to 2.5mm.[31] section that screw [63] and [1] are established in the center matches.Nearly peripheral ten through holes in place [62] all can align with the through hole [60] on the tapered end, and all with matched in clearance pack into interior pellet shot from a slingshot [12] and little spring [14].Connect with [16] fully not establishing two M3 screws [64] with [62] hole interference place.[64] do in the time of should assembling.When [13] being two assemblings with the used slotted eye of pin [19] of [1] location with doing.[13] thickness that adds [11] should equal the young segment length of [1].

[16] be the tail-hood tongue (referring to Figure 23) that iron and steel is made

[16] be that the center of disk is associated with vertical elongate in shape.The disk place does when two counter sinks [66] assembling is arranged, to aim at [64] hole.Its rectangular tongue hole [69] is done when also assembling, in order to plug-in mounting pin [17].

[16] long-tail tongue [68] as common door with built-in lock, insert lock box go to twist push aside, (, the coming the picture lock box) of locking because of belonging to common structure.Its assemble sequence is: 1.. be inserted in lock box [9] in the path section of axle [1] and overlap [56] end face that is pasting tapered end [11] again.2.. form by [6], [7], [8] one inserting (Fig. 1 shows from up to down) the slit of key between [5] and [9].Allow " n " shape groove [37] and [44] of key aim at axle [1], the interior end [51] that makes key base [43] be adjacent to a spoon box [9], can locate.Push away knob [2] again and be pressed into (showing from left to right) as Fig. 1, the afterbody [47] that just can make spoon nail [8] all from ten hole clippings [53] of spoon box [9] insertion directly reach in the aperture [60] of tapered end [11] (also be to use 2. this step when the user unblanks, twist knob [2] again and can unblank).3.. manage to make pack into ten outer pellets shot from a slingshot [10] of tapered end [11] to make even together with the end face that [59] are located as far as possible.4.. allow the tail spiral shell section [31] of axle [1] be screwed in the middle screw [63] of lock core [13], and allow [13] one end faces be adjacent to tapered end [11] as far as possible, can not rotate flexibly but do not influence axle [1].Again on the other end of lock core [13], draw-bore (can not bore and hinder tapered end [11]) and with the matched in clearance straight pin [19] of packing in the thread connection seam of it and axle [1].5.. ten intragranular pellet shot from a slingshot [12] (length should equate) and ten little springs [14] of in lock core [13], packing into.6.. on tail-hood tongue [16], get out counter sink [66] and its is pressed and accurately join and make two little screws [64], be screwed into two sunk screws [18] (ailhead can not protrude from end face [67]) again and get final product the exposing on the end face of lock core [13]; Its cylindrical section [65] can not protrude from lock core cylindrical [61].

At this moment [1], [2], [13], the unification of [16] string can be rotated flexibly relative to the disjunctor of [9] and compositions such as [11] together, can simulation unblank, if after easing out knob [2], the spoon nail just can be ejected, must be in some pellet shot from a slingshot [12] enter into tapered end [11] and block, having cancelled the possibility of rotating, has been locking.If the key that uses is not right, then can't make the contact surface of inside and outside pellet shot from a slingshot overlap with contact interface between lock core and tapered end, also can't unblank.This operating principle is identical with general cylinder lock.

[20] be the lock tube (referring to Figure 25) that iron and steel is made.

[20] be the shape that cylinder pastes connection one " u " shape fork bottom." u " shape fork end, should hide cylinder one port as far as possible, and fork-tail can not be too weak; Fork-tail also is drilled with counterbore [70] allows screw [15] be screwed in order to being installed in when door-plate [21] is gone up.The cylinder endoporus will match with [11] and [13] respectively, and Kong Changying equals [11] and adds thickness in the disk that [13] add [16], but should stay long slightly tolerance surplus.The bar tongue of [16] can be slipped in the hole of " u " shape fork bottom center.

During assembling, [20] are enclosed within tapered end [11] and lock core [13] periphery, and join the screw [58] of the screw [73] of making it and tapered end, be screwed into holding screw [22], and in the aperture [69] of tail-hood tongue [16], insert firmly cottor pin [17], tapered end [11] is performed the circumferential and axial location, then full lock is made.The assembling of this step will be noted: (connect then more reliably if add several spot welding points in both contact positions, file goes the solder joint also can be too difficult in the time of taking apart promptly to allow the cylinder end face of [20] be close to a spoon box [9].But should prevent the thermal deformation influence, go up together).And allow its inner bottom surface [72] tail-hood tongue [16] of trying one's best, cottor pin [17] also will be tried one's best near [20].Do not influence the flexible rotation of lock core again.

During user installation, should on door-plate [21], suitably get out the big slightly circular hole of cylindrical [71] earlier, this locked cock is gone into to compress than lock tube [20], interior the curved door-plate that is attached to of two reliable curved caudal furcas [70] of [20] (as Fig. 1 double dot dash line place, and upper and lower symmetry), and with countersunk head nail [15] is fixing just become.

Because of the diameter of the hole clipping [53] of spoon box [9] is littler than the diameter of pellet shot from a slingshot [10], so [10] can not deviate from by block.

The tapered end of the present utility model dress time spent, the thickness of door-plate [21] can be as small as more than the 14mm all can (thin also can fill up thick solution), needs the about diameter 22mm of boring, than common drawer-lock more greatly, and more much smaller than the door lock.So it is applicable to drawer and door simultaneously, versatility is stronger.Can avoid drawer-lock commonly used easily by ecto-entad hit take off, the deficiency of confidentiality difference.

If make tapered end in copper, this practical consumption copper is common 54% of the lock of taking out, and has more economized than door lock.And it need not that difficulty makes groove line keyhole, and also more easily bore in its pellet shot from a slingshot hole, and tapered end is also easily accurate with cooperating of lock core.Though increased many parts, be mostly the iron and steel stamping parts, some also can be received and use past heritage.So the comparable common drawer-lock of cost meeting is lower after the mass production, reaches inexpensive purpose.

Lock core sealing of the present utility model is hidden, and extremely difficult destroyed seal is imitative, even by the slit of foreign matter filling mortise lock spoon, also be easy to choose eliminating; Key inserts also easier, and can not twist into two parts spoon; Tapered end itself is set up knob again, need not establish handle etc. in addition; Pellet shot from a slingshot and spoon are not easy to wear or stuck, so easy to use and reliable.

The utility model also can cooperate by changing the radial position of pellet shot from a slingshot hole on tapered end to be combined into billions of kinds of thread form styles because of easily arranging more pellet shot from a slingshot, maintains secrecy manyly than the common mechanical lock.

As long as key of the present utility model is opened its spoon lid [6], changed the relative position of each spoon nail [8], then the thread form of key has just changed.Even stolen the going of spoon, also difficulty is unblanked into stealing, and has security performance more.And if by established rule, the tapered end of other corresponding pellet shot from a slingshot groups of spoon nail [8] the energy format utility model of transposing, then make the user only just can open with up to a hundred others the extremely difficult lock of knowing out with spoonful, (this should make a little marks to the big end [46] of key [8] certainly to subtract key burden greatly, be convenient to memorize for well, also easily seal up little adhesive tape and allow others' inconvenience peep to know) in its periphery.To the person of using who has a poor memory, then can easy-to-use glue etc. sticking fixed constant [46], to a lock, also can possess the more advantage that makes things convenient for spoonful, and this key is also not very big.

In addition, spoon lid [6] fills with after the magnetic, can connect to live knob [2] by magnetic when key inserts, the location of being more convenient for.The full lock outward appearance partly plates inscription or plating is moulded, can be more attractive in appearance.

Claims (2)

1. the latent mandrel of variable key is daily mechanical lock to the pellet shot from a slingshot built-in lock, it contains two major parts, one tapered end master has axle (1) front end to become thick section to buckle with inseparable feather key form by straight pin (4) and enclosing cover (3) to join knob (2), (1) stage casing is stayed and is the key location, (1) rear end becomes children's section to go into the centre bore of flat box-like spoon box (9) and oblate cylindricality tapered end (11) at no screw thread position sliding sleeve, the last position of this children section has screw thread to be screwed into oblate cylindricality lock core (13) centre bore to allocate straight pin (19) again into and become to connect firmly, in (9), (11) together be drilled with several group through holes by pasting the back in the appropriate location of the axis of parallel (1) with (13) alignment, (9) through hole is less, (11) the bigger outer pellet shot from a slingshot (10) of packing into and being uneven in length of sliding and all of through hole, (13) through hole and the greatly same of (11) and all sliding interior pellet shot from a slingshot (12) and little spring (14) of packing into isometric, dead end face in (13) pastes the tail-hood tongue (16) of screwing on two sunk screws (18) again, at last in (16), (13) blind cylindrical shape lock tube (20) and on (11) isodiametric periphery sliding sleeve, only allow the bar tongue of (16) stretch out rear end face from the central small hole cunning of (20) cecum and stay and turn dead bolt fully, the tube port position of (20) then is close to be decided screw (22) and rivet (23) or adds (11) and (9) capping of solid welding connection again; Its two keys master has the sheet spoon plate (7) of the several through holes that are drilled with all the axis of aiming at (10) that installed, the equal sliding sleeve of each through hole is gone into to follow closely tail and is protruded out for (7) being uneven in length of outer face spoon nail (8) with each (10) corresponding polishing, there is sheet spoon lid (6) to compress the ailhead end face of (8) again, inner face with (7) entangles firm with the crotch cassette again, and (6) and (7) midline also has and may be stuck in (1) stage casing and allow the nail tail of (8) all insert the through hole of (9) " several " the shape groove; This lock is characterized in that: the lock core (13) that interior pellet shot from a slingshot (12) and little spring (14) are housed is an elder generation with sliding joining, the tapered end (11) that outer pellet shot from a slingshot (10) are housed is joined admittedly for inferior, pack into together in the blind cylindrical shape lock tube (20), connect spoon box (9) the solid nozzle that blocks cover (20) at the back band; And many not isometric spoon nails (8) are the through holes that sliding sleeve is gone into a spoon plate (7), add by spoon lid (6) clip.

2. the latent mandrel of variable key according to claim 1 is to the pellet shot from a slingshot built-in lock, and it is characterized in that: the trend when being provided with slippage in the tapered end all is parallel to the interior pellet shot from a slingshot (12) and the outer pellet shot from a slingshot (10) of mandrel (1) axis.

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