CN201056888Y

CN201056888Y - Tamper-proof U shaped lock

Info

Publication number: CN201056888Y
Application number: CNU2007200398546U
Authority: CN
Inventors: 谢兆寿
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-15
Filing date: 2007-06-15
Publication date: 2008-05-07
Anticipated expiration: 2017-06-15

Abstract

The utility model relates to a lock. A lock core is arranged inside a lock casing, an inserting slot is arranged on a lock seat under the lock casing, the bottom end of a lock rod is hinged at the lower end of the lock seat, one section of the top end of the lock rod is inserted in the inserting slot, and a groove is arranged on the section of the lock rod, an expansion rod connected with the lock core is inserted in the groove discontinuously, a lock sleeve is arranged between the lock casing and the lock core, the lock sleeve is movably connected with the lock casing, the lock sleeve is discontinuously and movably connected with the lock core, namely, when a matching key is only inserted into the lock core and is rotated, the lock sleeve is movably connected with the lock core, when the matching key is inserted into the lock core and is rotated, the torque force of the lock core to the lock sleeve is weaker than the resistance force of a bottom seat to the lock sleeve, and the limit device of the lock sleeve is arranged on the lock casing. Even if a thief inserts a screwdriver and a drive bit, etc. into the key hole and rotates, the lock core is difficult to be damaged, the anti-theft effect is good, the structure is simple, and the utility model can be widely used for the theft prevention of a bicycle or an electrical bicycle.

Description

The pick-proof U-shape lock

Technical field

The utility model relates to a kind of lockset, and especially a kind of person that can effectively not avoid theft prizes the U-shape lock that bad core is implemented theft.

Background technology

At present, U-shape lock has obtained using widely in a lot of fields, especially in bicycle or the antitheft field of electric bicycle, its locking bar generally adopts the thicker bar bending of bore to be the U type, this locking bar can effectively prevent to utilize some cutting implements to cut off, but find in actual use, generally there is not the thief can select locking bar is cut off the enforcement theft, but the lock core of choice structure weakness is set about, present general U-shape lock, lock core and lock housing are fixed together, and the fastening devices between lock core and the lock housing is very fragile, when the thief with screwdriver, instruments such as bottle opener firmly rotate after inserting keyhole, fastening devices between lock core and the lock housing is promptly destroyed, lock core after the destruction can be extracted out in lock housing like a cork, thereby bicycle or electric bicycle are stolen, and brings loss for the people's property.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, also is difficult to destroy lock core, good anti-theft effect and pick-proof U-shape lock simple in structure even firmly rotate after providing a kind of thief with instruments such as screwdriver, bottle opener insertion keyhole.

The technical scheme that provides according to utility model, it is included in the inner lock core that is provided with of lock housing, have slot on the lock of lock housing below, one locking bar bottom is articulated in the lower end of lock, locking bar top one section insertion slot is interior and offer groove on this section locking bar, the expansion link discontinuity that links to each other with lock core is inserted in the groove, between lock housing and lock core, be provided with lock barrel, lock barrel and lock housing flexibly connect, lock barrel and lock core discontinuity flexibly connect, promptly only in lock core, insert matched key and when rotating sleeve and lock core be movably connected, lock core can rotate in lock barrel and make expansion link stretch out in the insertion groove or in the retraction lock core, insert matched key in the lock core and when rotating by lock core to the torsion of lock barrel less than lock housing and/or base resistance to lock barrel, lock housing is provided with the stopping means of lock barrel.

In the lock upper surface and/or the lock barrel external surface offer stopper slot, in stopper slot, be provided with spring, be provided with the spacing ball of upper and lower slip within it in the stopper slot on spring top, this spacing ball spherical calotte is embedded in the spacing concave surface of offering on lock barrel lower surface and/or the lock housing inner surface that coincide with the spacing ball profile, spacing ball is positive sphere or elliposoidal, and spacing ball is positive sphere.

Maximum static friction force between lock housing and the lock barrel greater than when inserting matched key in the lock core and rotating by the torsion of lock core to lock barrel; Insert matched key in the lock core and when rotating by lock core to the torsion of lock barrel less than the maximum static friction force between lock housing and the lock barrel and spacing ball resistance sum to lock barrel.

The stopping means of lock barrel is for to be coated with protecting cover at lock barrel and lock core top end face outside, and this protecting cover and lock housing are in one-piece connection, and offers the through hole of being convenient to plug and unplug key at the keyhole place of corresponding lock core.

The ring-type that the match contour chute of the stopping means of lock barrel for offering at lock barrel outer wall and lock-shell lining is provided with ball in the chute.On expansion link, offer the chute of vertical direction, correspondingly be provided with the projection that can in chute, slide up and down at the lock barrel inwall.

The utility model also is difficult to destroy lock core even the thief inserts firmly to rotate behind the keyhole with instruments such as screwdriver, bottle openers in use, and good anti-theft effect is simple in structure, can be widely used in bicycle or electric bicycle is antitheft.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model.

Fig. 2 is the protecting cover structural representation in the utility model.

Fig. 3 is chute and the roll structure schematic diagram thereof that is arranged at lock-shell lining face, lock barrel outside wall surface in the utility model.

The specific embodiment

As shown in the figure: lock core 3 is set in the inside of lock housing 1, have slot 5 on the lock 4 of lock housing 1 below, one locking bar, 6 bottoms are articulated in the lower end of lock 4, one section on locking bar 6 tops are inserted in the slot 5 and offer groove 7 on this section locking bars 6, expansion link 8 discontinuity that link to each other with lock core 3 are inserted in the groove 7, between lock housing 1 and lock core 3, be provided with lock barrel 2, lock barrel 2 flexibly connects with lock housing 1, lock barrel 2 flexibly connects with lock core 3 discontinuity, promptly only in lock core 3, insert matched key and when rotating sleeve 2 be movably connected with lock core 3, lock core 3 can rotate in lock barrel 2 and make expansion link 8 stretch out in the insertion groove 7 or in the retraction lock core 3, insert matched keys in the lock core 3 and when rotating by the torsion of 3 pairs of lock barrels 2 of lock core resistance less than lock housing 1 and/or 4 pairs of lock barrels 2 of base, lock housing 1 is provided with the stopping means of lock barrel 2.

In lock 4 upper surfaces and/or lock barrel 2 external surfaces offer stopper slot 11, in stopper slot 11, be provided with spring 12, be provided with the spacing ball 13 of upper and lower slip within it in the stopper slot 11 on spring 12 tops, these spacing ball 13 spherical calottes are embedded in the spacing concave surface of offering on lock barrel 2 lower surfaces and/or lock housing 1 inner surface 14 that coincide with spacing ball 13 profiles, spacing ball 13 can be positive sphere or elliposoidal, and spacing ball 13 preferably is positive sphere.

Maximum static friction force between lock housing 1 and the lock barrel 2 greater than when inserting matched key in the lock core 3 and rotating by the torsion of 3 pairs of lock barrels 2 of lock core.

Insert matched keys in the lock core 3 and when rotating by the torsion of 3 pairs of lock barrels 2 of lock core resistance sum less than the maximum static friction force between lock housing 1 and the lock barrel 2 and 13 pairs of lock barrels 2 of spacing ball.

The stopping means of lock barrel 2 can be for being coated with protecting cover 9 in lock barrel 2 and lock core 3 top end face outsides, and this protecting cover 9 is in one-piece connection with lock housing 1, offers the through hole 10 of being convenient to plug and unplug key at the keyhole place of corresponding lock core 3; The stopping means of lock barrel 2 also can be provided with ball 16 for the contour chute of offering at lock barrel 2 outer walls and lock housing 1 inwall 15 of the ring-type that matches in the chute 15, even the combination of above-mentioned two kinds of schemes.

On expansion link 8, preferably offer the chute 18 of vertical direction, correspondingly be provided with the projection 17 that can in chute 18, slide up and down at lock barrel 2 inwalls, be convenient in lock core 3 to insert original key rotates that rear drive expansion link 8 stretches into groove 7 in or in the groove 7 extraction play guide effect.

When in the keyhole of lock core 3, inserting matched key and rotating, can promptly lock or open U-shape lock of the present utility model so that expansion link 8 stretches into groove 7 or upwards mentions.After the thief inserts keyhole with instruments such as screwdriver, bottle openers, firmly rotate when attempting to destroy lock core 3, at this moment lock core 3 is in aggregates with lock barrel 2, the torsion that instrument such as screwdriver, bottle opener transmits by 3 pairs of lock barrels of lock core 2 is during greater than the maximum static friction force between lock housing 1 and the lock barrel 2, lock core 3 and the i.e. constantly rotation in lock housing 1 of lock barrel 2, thief attempt is unable to eat power by instruments such as screwdriver, bottle openers to the destruction of lock core 3, also promptly can't destroy lock core and opens this lock.And be 9 pairs of lock cores 3 of protecting cover, 2 Global Macroses of lock barrel of one with lock housing 1, the thief can't be set about.

Perhaps work as the thief and use screwdriver, instruments such as bottle opener firmly rotate when attempting to destroy lock core 3 after inserting keyhole, at this moment lock core 3 is in aggregates with lock barrel 2, screwdriver, the torsion that instruments such as bottle opener transmit by 3 pairs of lock barrels of lock core 2 is during greater than the resistance of the 13 pairs of lock barrels 2 of spacing ball in the stopper slot 11 of lock 4, at this moment the pressure of 2 pairs of spacing balls 13 of lock barrel is absorbed in stopper slot 11 with regard to the elastic force that makes spacing ball 13 overcome spring 12, can in lock housing 1, rotate lock core 3 and lock barrel 2, the elastic force that the pressure of 2 pairs of spacing balls 13 of lock barrel just makes spacing ball 13 overcome spring 12 after rotating a circle is absorbed in stopper slot 11 once more, so circulation is gone down, the i.e. constantly rotation in lock housing 1 of lock barrel 2 and lock core 3, screwdriver is passed through in thief's attempt, instruments such as bottle opener are unable to eat power to the destruction of lock core 3, also promptly can't destroy lock core and open this lock.

And locking bar 6 middle parts can be the hard one, also can be chain forms.

Claims

1. pick-proof U-shape lock, it is included in the inner lock core (3) that is provided with of lock housing (1), have slot (5) on the lock (4) of lock housing (1) below, one locking bar (6) bottom is articulated in the lower end of lock (4), one section on locking bar (6) top is inserted in the slot (5) and offer groove (7) on this section locking bar (6), expansion link (8) discontinuity that links to each other with lock core (3) is inserted in the groove (7), it is characterized in that: between lock housing (1) and lock core (3), be provided with lock barrel (2), lock barrel (2) flexibly connects with lock housing (1), lock barrel (2) flexibly connects with lock core (3) discontinuity, promptly only in lock core (3), insert matched key and when rotating sleeve (2) be movably connected with lock core (3), lock core (3) can rotate in lock barrel (2) and make expansion link (8) stretch out in the insertion groove (7) or in the retraction lock core (3), insert matched key in the lock core (3) and when rotating by lock core (3) to the torsion of lock barrel (2) less than lock housing (1) and/or base (4) resistance to lock barrel (2), lock housing (1) is provided with the stopping means of lock barrel (2).

2. pick-proof U-shape lock as claimed in claim 1, it is characterized in that: in lock (4) upper surface and/or lock barrel (2) external surface offer stopper slot (11), in stopper slot (11), be provided with spring (12), be provided with the spacing ball (13) of upper and lower slip within it in the stopper slot (11) on spring (12) top, this spacing ball (13) spherical calotte is embedded in the spacing concave surface of offering on lock barrel (2) lower surface and/or lock housing (1) inner surface (14) that coincide with spacing ball (13) profile.

3. pick-proof U-shape lock as claimed in claim 2 is characterized in that: spacing ball (13) is positive sphere or elliposoidal.

4. pick-proof U-shape lock as claimed in claim 3 is characterized in that: spacing ball (13) is positive sphere.

5. pick-proof U-shape lock as claimed in claim 1 is characterized in that: the maximum static friction force between lock housing (1) and the lock barrel (2) greater than when inserting matched key in the lock core (3) and rotating by the torsion of lock core (3) to lock barrel (2).

6. pick-proof U-shape lock as claimed in claim 1 is characterized in that: insert matched key in the lock core (3) and when rotating by lock core (3) to the torsion of lock barrel (2) less than the maximum static friction force between lock housing (1) and the lock barrel (2) and spacing ball (13) resistance sum to lock barrel (2).

7. pick-proof U-shape lock as claimed in claim 1, it is characterized in that: the stopping means of lock barrel (2) is for being coated with protecting cover (9) in lock barrel (2) and lock core (3) top end face outside, this protecting cover (9) is in one-piece connection with lock housing (1), offers the through hole (10) of being convenient to plug and unplug key at the keyhole place of corresponding lock core (3).

8. pick-proof U-shape lock as claimed in claim 1 is characterized in that: the ring-type that the match contour chute (15) of the stopping means of lock barrel (2) for offering at lock barrel (2) outer wall and lock housing (1) inwall is provided with ball (16) in the chute (15).

9. pick-proof U-shape lock as claimed in claim 1 is characterized in that: offer the chute (18) of vertical direction on expansion link (8), correspondingly be provided with the projection (17) that can slide up and down at lock barrel (2) inwall in chute (18).