CN2417248Y - Key hole puzzle lock cover - Google Patents

Abstract

The utility model relates to a key hole cipher safety cover which is a lock accessory. The key hole cipher safety cover is provided with three circular rings which are adjacent to each other and are provided with inner ring pieces and can rotate axially, and the outer sides of the circular rings are provided with scales; an inner ring hole is provided with a pin shaft, the number, the space and the width of a concave groove of which are corresponding to that of the inner ring pieces, and the inner ring pieces are clamped into the concave groove of the pin shaft to drive a cover plate arranged on an outer end to sink into a concave pit of a lock to cover a key hole; the inner ring pieces are all provided with a notch, and when the notches of the three inner ring pieces are all aligned with the pin shaft, the cover plate is withdrawn from the concave pit to expose the key hole.

Description

Key hole Cipher safety lid

The utility model relates to a kind of annex of lock, particularly can prevent the protection device that the key hole is inserted by his human key or foreign material.

Our various key locks of using now, no matter be common padlock, or luxurious spherical door lock or other special-purpose special locks, lock core and keyhole are all arranged on its lock body, and keyhole all obviously exposes, this is the shortcoming of a maximum of these locks: this allows the burglar can be easily insert in the keyhole with master key lock is opened, and also allows the stranger that foreign material such as little iron nail or little bamboo chip are inserted in the keyhole easily and causes the trouble of unblanking.

The purpose of this utility model is that a kind of protecting cap with cipher control will be provided, and it is contained in covers keyhole on the lock body, transfers just can allow keyhole expose to password.

The purpose of this utility model is achieved in that loading onto at least 3 at the bayonet socket of lock body adjoins each other, has interior ring plate, can coaxially rotate, the graduated annulus in outside, a reeded bearing pin is housed in the interior annular distance of annulus, the quantity of groove, spacing and width are corresponding with interior ring plate, the interior ring plate of each annulus snaps on the lock shaft in the corresponding groove just, on the ring plate breach that can allow bearing pin pass through is arranged all in each, the outer end of lock shaft welds a cover plate that sinks to the off-centre of the keyhole pit on the lock body just.As long as there is an interior ring plate to be stuck in the groove of bearing pin, bearing pin just can not shift out outward, at this moment the cover plate of bearing pin outer end sinks in the pit on the lock body just and shelters from keyhole in the hole, when having only the breach that all forwards ring plate in it to when each annulus all to aim at bearing pin, bearing pin just can shift out outward, make simultaneously outside the cover plate emersion cover plate hole, at this moment rotatable cover plate and bearing pin allow keyhole expose.

Annulus can be made into sheet, also can be made into tubular.It is cylindric that bearing pin can be made into whole piece, and also can be made into the outer end is the cylindric and inner strip of sheet that is.

Annulus can be made into the form that is divided into two bodies with interior ring plate, and on interior ring plate rotating lever pin is set, and makes the pin hole on the inner hole surface of annulus, with the finger axle rotating lever pin on the lock body, makes it to enter or withdraw from the pin hole, thus the conversion password.

The utility model is because available Cipher safety covers in the pit that sinks on the lock body, shelter from keyhole fully, have only the password position of accent to each annulus, just can make protecting cap shift out pit, expose keyhole,, be convenient to operation so the utility model is not only simple in structure, and have great tamper-resistant function, can prevent effectively that outer human master key from unblanking or destroy lock with foreign material.

The concrete structure of utility model is provided by the following examples and accompanying drawing.

Fig. 1 is that the utility model sheet circular ring type is contained in the schematic diagram that spheric door is locked.Fig. 2 is that the A of Fig. 1 is to view.Fig. 3 is that B among Fig. 1 is to view.Fig. 4 is the C-C sectional view of Fig. 1.Fig. 5 is that the utility model tubular circular ring type is contained in the schematic diagram that spheric door is locked.Fig. 6 is that the utility model is contained in the schematic diagram on the padlock.Fig. 7 is the schematic diagram of the utility model interchangeable password.Fig. 8 is the D-D sectional view among Fig. 7.

Can see by Fig. 1 and Fig. 5, in the bayonet socket 4 that forms between left clamp of on lock body 1, fixing 2 and the right clamp 3, be equipped with 3 and be close to the plate-like of adjacency or the annulus 5,6,7 of tubular mutually.They have interior ring plate 8,9,10 radially respectively; Be carved with scale 11 on its periphery, can also engrave number or Chinese phonetic alphabet character code 12 (as seen from Figure 3) on the scale side.On the endoporus limit of ring plate a breach 13 is arranged all in each annulus.(in Fig. 4, easily seeing), the endoporus limit of the inner ring plate of annulus be enclosed between the lock body bayonet socket 4 the axle on, (this both can be the axle that lock body itself is made, and also can be the axle that adds) is so three annulus can coaxially rotate.A bearing pin 14 is housed in the interior annular distance of annulus.3 grooves 15,16,17 are arranged on it.They are corresponding with the interior ring plate 8,9,10 of annulus 5,6,7 respectively: the spacing between the spacing between the groove 15 and 16 and interior ring plate 8 and 9 is identical, spacing between the groove 16 and 17 is identical with spacing between interior ring plate 9 and 10, the width of groove 15,16,17 is corresponding with the thickness of interior ring plate 8,9,10 respectively, the width that is groove 15,16,17 is more bigger than the thickness of interior ring plate 8,9,10 respectively, ring plate is rotated in corresponding grooves in can allowing, again not significantly loose spacious sense.Bearing pin 14 suitably sinks in the cotter way 18 of lock body 1, make the groove surface of bearing pin concordant with the periphery of lock body axle, the pillow block face of bearing pin is then than the periphery height of lock body axle, so bearing pin 14 just is snapped into the interior ring plate of groove and blocks, as long as (have an interior ring plate to snap in the groove, bearing pin just can't move vertically, the cover plate 19 that the bearing pin outer end welds just sinks in the keyhole end pit 20 on the lock body end face just, (profile of cover plate 19 and pit 20 can be done to such an extent that match just), cover plate can not move, can not rotate again, just in time shelter from keyhole fully.Want to allow cover plate withdraw from pit, expose key, have only by rotating three annulus 5,6,7 respectively, its each endoporus limit breach 13 is all aligned with bearing pin 14, (judging) by scale 11 or sign indicating number 12, this moment, ring plate did not snap in the groove in it, bearing pin 14 and cover plate 19 just can move right simultaneously (direction of seeing Fig. 1), make cover plate withdraw from pit 20 earlier, again cover plate and bearing pin are rotated 90 ° to 180 °, keyhole is exposed.For convenience, can allow cover plate 19 and bearing pin 14 at password to ejecting outward automatically on time, can lay a little compression spring 21 in the inner of bearing pin 14.In order to prevent that bearing pin from being pushed up head, can snap in a little pin or jump ring 22 in bearing pin the inner again, blocked by the draw-in groove on the lock body 23 when allowing it be moved out to the appropriate location.

But the utility model also shown in the image pattern 6 like that, be used on the common padlock, at this moment just can not do the rotating shaft of password annulus 5,6,7 with lock body, but directly do the rotating shaft of annulus with bearing pin 14, bearing pin the inner is made and (can be welded, perhaps with the flat broadening of hammer) double wedge and groove one section is arranged, make the breach more bigger than double wedge, that shape is identical on the limit, hole of the interior ring plate of annulus and get final product.

For the ease of changing password, but image pattern 7 and Fig. 8 make two bodies with interior ring plate 8,9,10 respectively with annulus 5,6,7, the pin hole 24 identical with the quantity of outside scale 11 is set on the inner headed face of annulus, a rotating lever pin 25 is installed on interior ring plate, a finger axle 26 is set on the lock body 1 again, lever pin and finger axle all are equipped with torsion spring, and the upper boom 27 of lever pin 25 is inserted in the pin hole 24, make dialling of finger axle 26 refer to that 28 sink in the lock body hole 29.Clockwise rotate finger axle 26, allow dial refer to that 28 lift the lower beam 30 of shifting lever pin 25, lever pin 25 is rotated counterclockwise, its upper boom 27 promptly withdraws from the pin hole 24 of annulus, gets final product tumbler ring (ring plate is motionless in this moment), has changed password.Allow the finger axle rotate counterclockwise return then, the upper boom 27 of lever pin 25 can snap in the pin hole 24 again, and password is fixed.

Claims (4)

1, a kind of key hole Cipher safety lid, in the bayonet socket (4) of lock body (1), install, it is characterized in that: have at least 3 to be close to adjacency mutually, have interior ring plate (8,9,10), there is scale (11) outside, annulus (5 that can coaxial rotation, 6,7), be equipped with one fluted (15 in the interior annular distance of annulus, 16,17) bearing pin (14), the quantity of groove, spacing and width are corresponding with interior ring plate, the interior ring plate of each annulus snaps in bearing pin (14) and goes up in the corresponding groove, all have one can allow bearing pin pass through breach (13) on the ring plate in each, the outer end of bearing pin welds one and sinks to the eccentric cover plate (19) in the keyhole end pit (20) on the lock body just.

2, by the described key of claim 1 hole Cipher safety lid, it is characterized in that: also have number or character code (12) on the periphery of annulus (5,6,7).

3, by claim 1 or 2 described key hole Cipher safety lids, it is characterized in that: a little compression spring (21) is also pushed up in the inner of bearing pin (14), and card has a little pin (22).

4, by claim 1 or 2 described key hole Cipher safety lids, it is characterized in that: annulus (5,6,7) is divided into two bodies with interior ring plate (8,9,10) respectively, the inner headed face of annulus has pin hole (24), lever pin (25) is housed on the interior ring plate, finger axle (26) is arranged on the lock body (1), its group refers to (28) but the lower beam (30) of shifting lever pin (25) withdraws from its upper boom (27) from pin hole (24).

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