JPH0345495Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a disk tumbler lock, in particular a square hole in which a master key and a change key are inserted into the center of the disk, and a thin plate part of the change key inserted into the center of the lower part of the square hole. The present invention relates to a disc tumbler tablet which uses a disc with continuous small holes and allows each disc to be used as either the front or the back.

B. Prior Art Disk tumbler locks are widely known as keys that have a hole in the center for the key to enter, and are made by combining several types of disks with different positions.

This disc tumbler lock fits the end of the disc into the groove of the outer cylinder by receiving the elastic force of the coil spring inserted into the hole in the inner cylinder with the spring holder protruding from the side of the disc. It is configured so that it does not turn, and when the key is inserted, the disc moves against the elastic force of the coil spring due to the notches of the key, and the disc is stored in the inner cylinder, leaving the inner cylinder free. ing.

C. Problems to be solved by the invention In a locking device, it is desirable to obtain many different locks for one lock from the viewpoint of production, cost, and security.

The difference between disc tumbler locks is determined by the type of disc and the number of discs, which have different hole positions.

In this disc tumbler lock, in order to obtain many different locks, it is necessary to increase the types of discs and the number of discs.

However, there is a limit to increasing the types of disks and the number of disks, considering the size and cost of the lock.

Additionally, it is possible to increase the number of different locks by putting indentations on both sides of the lock and dividing the disk into one that protrudes upward and one that protrudes downward, but this method complicates the structure of the lock and makes it difficult to manufacture. At the same time, there was a drawback that the manufacturing cost was high.

D. Means for Solving the Problems In view of the above-mentioned deficiencies, the present invention has been developed by drilling spring holes into which coil springs are inserted in an alternating and staggered manner on the outside of the disk insertion hole formed in the inner cylinder. In addition to making it possible to insert many disks into the small inner cylinder, the square hole into which the master key and change key are inserted and the thin hole into which the thin plate part of the change key is inserted are connected symmetrically with respect to the vertical center line. Several types of disks with lock holes are provided, and by using them on the front and back, a large number of different locks can be obtained.

E. Function In this disk tumbler lock, when the lock is locked, the upper end of the disk 7 is fitted into the groove of the outer cylinder 1 by the repulsive force of the coil spring 21, and the inner cylinder 4 is prevented from turning. There is. In this state, the master key 16 or change key 17
When the key is inserted, the disc 7 is pushed down by the notch of the key, and the disc 7 is housed in the inner cylinder 4, which allows the inner cylinder 4 to rotate freely. Move the engaged bolt to unlock the lock. Even if a key with a different indentation is inserted, the disk 7 will not be pressed down and the inner cylinder 4 will not turn. Therefore,
As a result, the lock cannot be unlocked.

EXAMPLE Hereinafter, one example of implementing the present invention will be described in detail with reference to the drawings.

1 is the outer cylinder of a disk tumbler lock made of hard synthetic resin and molded into a cylindrical shape.
is formed into a bulge, and a male screw 3 for screwing into a lock case (not shown) is carved at the rear of the outer edge 2.
A stepped portion 6 into which the overhanging edge 5 of the inner cylinder 4 is fitted is formed on the inner front side, and four grooves 8 into which the tip of the disk 7 projects are formed at 90 degree intervals.

A notch 9 is formed in the stepped portion 6 of the outer cylinder 1 at one location between adjacent grooves 8, 8, and the inner cylinder 4 is inserted into this notch 9.
A stopper 10 protruding from the rear surface of the projecting edge 5 is loosely fitted to limit the range of rotation of the inner cylinder 4.

The inner cylinder 4 inserted into the outer cylinder 1 is made of hard synthetic resin and molded into a hollow body like the outer cylinder 1, and has an overhanging edge 5 formed on the front side outer periphery to fit into the step 6 of the outer cylinder 1. A stopper 9 that loosely fits into the notch 9 of the outer cylinder 1 is protruded from the rear surface of the projecting edge 5 as described above, and behind the stopper 9, the third, fourth, and fifth disk insertion holes 11 into which the disk 7 is inserted are provided. As shown in the figure, spring holes 12 are formed on the outside of each disk insertion hole 11 in an alternating and staggered manner. Further, a slit 13 into which a ring stopper 30 is fitted is formed at the rear of the inner cylinder 4, and a notched protrusion 14 is provided protruding from the rear end.

Further, a keyhole 15 is bored in the front of the inner cylinder 4, and a protrusion 20 that engages with the search grooves 18, 19 of the master key 16 and change key 17 is provided in the keyhole 15.

The disk insertion hole 11 of the inner cylinder 4 has six elongated holes into which the disks 7 are inserted, which are arranged horizontally and in parallel.
As shown in the figure, they are connected by a central vertical groove 11a. .

Furthermore, a coil spring 21 is inserted into the spring hole 12 of the inner cylinder 4 to press the disk 7 outward as shown in FIG. Note that a guide groove 31 is formed on the side of the disk insertion hole 11 of the inner cylinder 4, in which the guide protrusion 23 of the disk 7 slides.

The six disks 7 inserted into the disk insertion holes 11 of the inner cylinder 4 are formed by punching and molding an alloy plate, and as shown in FIG. Guide protrusions 23 are attached to the center of each side, and a keyhole 24 is opened in the center.

The keyhole 24 of each disk 7 has a master key 16
A rectangular hole 25 into which the change key 17 is inserted, and a thin hole 27 into which the thin plate part 26 of the change key 17 is inserted are connected at the lower center of the square hole 25, and the whole is formed in a symmetrical shape with respect to the vertical center line. There is.

The keyhole 24 of this disk 7 is designed such that the distance from the lower side of the disk 7 to the lower side of the thin hole 27 is ∫ ₁ , the height of the thin hole 27 is ∫ ₂ , and the square hole 2
By setting the height of 5 to ∫ ₃ , dividing the length of ∫ ₁ into three stages, and dividing each stage of ∫ ₂ into three stages, nine types of discs are obtained.

The master key 16 is engraved with notches 28 that fit the six discs 7, and has protrusions 28 on the side of the inner cylinder 4.
A search groove 18 is formed which engages with 0.

The change key 17, like the master key 16, is provided with notches 29 that fit with the six discs 7, and a search groove 19 that engages with the protrusion 20 of the inner cylinder 4 is formed on the side surface.

G. Effect of the invention As described above, the disk tumbler lock according to the invention has a spring hole 12 into which the coil spring 21 is inserted on the side of the disk insertion hole 11 of the inner cylinder 4.
The disk insertion holes 11 are drilled alternately and in a staggered manner so that many different keys can be obtained by drilling a large number of disk insertion holes 11 in a narrow range. It is formed by a square hole 25 into which the change key 17 is inserted and a thin hole 27 into which the thin plate part into which the change key 17 is notched is inserted, and by cutting the thin hole 27 into the center lower part of the square hole 25, the keyhole 24 is made bilaterally symmetrical. Since one disk 7 can be used for both the front and back, it is now possible to use the same lock for a variety of different keys.

In addition, if the disk 7 is of nine types and the front and back sides are used as in this embodiment, the number of different keys of the change key 17 can be 3 ^{to 6} , and the number of different keys of the master key 16 can also be 3 ^{to 6} , which makes it possible to use many master systems. can be configured efficiently. According to the disk arrangement method of the conventionally known master system, in order to obtain the above number of different keys, 18 types of disks are required, which is twice the number of 9 types of disks, which incurs a large amount of manufacturing cost and requires a lot of processing time for the locks. This becomes complicated and requires a larger lock.

Furthermore, in the present invention, the keys are notched on one side, and the spring holes 12 are bored alternately and in a staggered manner, so that compact disc cylinder locks with many different keys can be mass-produced at low cost.

[Brief explanation of the drawing]

Figure 1 is a plan view of the disk tumbler lock, Figure 2
The figure is a front view, Figure 3 is a sectional view taken along line A-A in Figure 1, Figure 4 is a sectional view taken along line B-B in Figure 2, and Figure 5 is a sectional view of the inner cylinder. 4 plan view,
FIG. 6 is an enlarged front view showing one example of the disk 7, FIGS. 7 a to i are partial front views showing the types of keyholes 24 of the disk 7, FIG. 8 is a front view of the master key 16, and FIG. FIG. 8 is a cross-sectional view taken along the line C--C, FIG. 10 is a front view of the change key 17, and FIG. 11 is a cross-sectional view taken along the line D--D in FIG. Main symbols in the figure: 1...outer cylinder, 4...inner cylinder, 7...
... Disk, 8 ... Groove, 11 ... Disk insertion hole, 12 ... Spring hole, 16 ... Master key, 17 ... Change key, 21 ... Coil spring, 22 ... Spring holder, 24 ... Keyhole,
25...Square hole, 26...Thin plate part, 27...Small hole.

Claims (1)

[Scope of utility model registration request] The inner cylinder 4 into which several disks 7 are inserted is connected to the outer cylinder 1.
In a disc tumbler lock, the disc tumbler lock is inserted into the inner cylinder 4 and the tip of the disc 7 is fitted into the groove 8 of the outer cylinder 1 by the elastic force of the coil spring 21 to prevent rotation of the inner cylinder 4. Spring hole 1 into which coil spring 21 is inserted outside 11
2 alternately and in a staggered manner, and the master key 16
and a disk with a keyhole 24 in which a square hole 25 into which the change key 17 is inserted and a thin hole 27 into which the thin plate portion 26 of the change key 17 is inserted are connected in a symmetrical manner with respect to the vertical center line at the lower center of the square hole 25. A disc tumbler lock characterized in that the disc 7 is provided with several types of square holes 25 and thin holes 27 of different lengths, so that each disc 7 can be used in two types: front and back.