CN2321882Y - Diameter-changeable spring drawn back prizing-proof lock - Google Patents

Abstract

The utility model relates to diameter-changeable spring drawn back prizing-proof lock, belonging to a prizing-proof lock. On the basis of the existing universal cylinder lock, the diameter of a suspension loop (1) and a locking hole (9) is changed, and a stemming (10) is lengthened, and a cylinder spring (11) is shortened. Therefore, the purpose that the lock is avoided from being prized by simple tools can be achieved.

Description

The reducing spring pick-proof lock that contracts

The utility model relates to a kind of anti-lock of usurping.

Use widely padlock at present and be the further antitheft theftproof lock of on Bicycles and Motorcycles, using, all be constant for many years on structural performance, form by the pin in link and the lock body, pellet shot from a slingshot, spring, obstruction, lock core and lockhole, keyhole, marble spring hole, oil filler point etc. mostly.On the structure, the one, because the link diameter is constant, then the lockhole diameter is also constant and be complementary, like this, the slit that link contacts with lockhole is straight, inserts lockhole with an arc foil along link, very easily pin is pushed back and gently draws link, locks just to be opened.The 2nd,, when behind five marble spring holes of lock body one sidetracking, after promptly order is put into two joint pellets shot from a slingshot, spring, the aperture is blocked with the metal obstruction, and the length of its obstruction is very short, and spring is then longer relatively, this structure, be easy to obstruction is removed with general tool on the one hand, and pour out spring and two joint pellets shot from a slingshot, thereby lock was lost efficacy; On the other hand, because spring is longer, compressible yardstick is big, with simple dentation instrument, then two joint pellets shot from a slingshot can be pressed in the spring eye fully, thereby lock was lost efficacy.This shows that the structure of this lock is very easily pried open, and loses antitheft effect, this is this significant disadvantages that is latched in.

Purpose of design of the present utility model is under the prerequisite of the basic structure that does not change cylinder lock, makes partial structurtes and improves, to improve the pick-proof performance of cylinder lock.

Purpose of design of the present utility model is by changing the diameter of link and lockhole, make lockhole be step-like with the slit that contacts of link, by the length of increase obstruction and the length of corresponding shortening spring, obviously change above-mentioned shortcoming simultaneously, and reach the purpose that strengthens the pick-proof performance.

The technical solution of the utility model is for example shown in Figure 1 being illustrated with padlock.Fig. 1 is for facing generalized section.The ingredient of lock is the same with general padlock, by link (1) and by lock (16) of restriction link (1) position, the spring (17) that flicks link (1), the pin (5) that pins link (1), pinhole (6), spring pin (21), lockhole (9) marble spring hole (8), marble spring (11), obstruction (10), two pellets shot from a slingshot (12) and (12a), the lock body formation formed of lock core (18), fuse finger post (20), oil filler point (19).One of technological improvement of the present utility model be with link (1) in the cross section (2) locate to the top overstriking (according to the lock big I overstriking 2mm, 3mm, 4mm etc.), and corresponding with lockhole (9) in the cross section (4) locate upwards with enlarged-diameter (promptly consistent) with link (1) hole enlargement, link (1) and lockhole (9) are complementary, when pin (5) and pin mouth (3) match pinning, vertical slit (7) between link (1) and lockhole (9) is step-like, rather than straight, insert the shortcoming that lock interior extruding pin (5) is opened lock thereby avoid contacting the slit with lockhole (9) along link (1) with foil.Two of its technological improvement is to put into pellet shot from a slingshot (12 with boring good marble spring hole (8), 12a) and behind the spring (11), block the aperture with metal obstruction (10), obstruction (10) is lengthening (with the phase-locked ratio of existing market use) obviously, its elongated portion is the corresponding shortening part of spring (11), its size match will make the spring (11) and pellet shot from a slingshot (12 of compressed tablet, the length in the big sub-spring of total length 12a) hole (8), be spring (11) and the distance of the contact point (14) of obstruction thing (10) to the slit (13) that spring eye (8) contacts with lock core (1 8), that is to say that the spacing on (14) to pellet shot from a slingshot (12) top (15) is greater than (14) spacing to (13); The total length of the spring (11) after will making pellet shot from a slingshot (12a) simultaneously and compressing is less than (14) spacing to (13).So then use general tool all not to be pressed into pellet shot from a slingshot (12,12a) in the spring eye (8) simultaneously, lock can not pried open.In addition, because obstruction (10) is longer, also just avoided opening obstruction (10) and making spring (11), pellet shot from a slingshot (12,12a) deviate from spring eye (8) and make the shortcoming of lock inefficacy with the file file.But be inserted and rotated lock core (18) from keyhole with corresponding key, promoting pellet shot from a slingshot (12,12a) compresses to spring (11), drive fuse finger post (20) simultaneously, fuse finger post (20) pulling pin (5) compression spring (21), the pin mouth (3) that pin (5) is deviate from the link (1) is return in the pinhole (6) fully, link spring (17) is upspring link (1) to upper edge pin slideway (22), make an end of link (1) eject lockhole (9), and lock is opened.For preventing to get rusty, can pass through often drip-feed lubricating oil of oil filler point (19).

This utility model production technology is simple, link (1) overstriking one-shot forming aborning, the lockhole reaming can get final product with the reaming of corresponding particle size drill bit, and the obstruction technology of obstruction (10) is constant, just presses matching relationship lengthening and the corresponding shortening of spring (11) is got final product.Therefore, this utility model production technology is simple, and cost of production does not increase, and just with link (1) and lockhole (9) reducing, with obstruction (10) lengthening, spring (11) is shortened, and can further realize the purpose of pick-proof.

Claims (3)

1, a kind of pick-proof lock, it is made up of the pin in link and the lock body, pellet shot from a slingshot, spring, obstruction and lock core etc., and the bore that it is characterized in that link (1) and lockhole (9) is the reducing coupling, the length of its obstruction (10) lengthening and corresponding shortening spring (11).

2, pick-proof lock according to claim 1, it is characterized in that link (1) in the cross section (2) locate reducing, part overstriking between the cross section (2) is (according to the big I overstriking of lock body 2mm, 3mm, 4mm ... Deng), and locate the hole enlargement corresponding size in the cross section (4) of lockhole (9) and link (1) is complementary.

3, pick-proof lock according to claim 1, the length of obstruction (10) and the length of corresponding shortening marble spring (11) is characterized in that extending, should satisfy the total length of spring (11) after the compression and pellet shot from a slingshot (12,12a), length greater than marble spring hole (8), promptly the length of (14) to (15) is greater than (14) to (13) length, and the total length of the spring (11) after the compression and pellet shot from a slingshot (12a) is less than the length of marble spring hole (8).

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