JP2668189B2 - Cylindrical key for cylinder lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical key used in a cylinder lock for preventing unauthorized unlocking (picking) of a cylinder lock, and more particularly to a cylinder lock for preventing picking. The present invention relates to a cylinder key of a cylinder lock which can prevent rust in both the cylinder lock and the cylinder key.

[0002]

2. Description of the Related Art Conventionally, a cylinder lock has a rotor inside, for example, Japanese Utility Model Laid-Open No. 60-90659 or Japanese Utility Model Laid-Open No.
As described in Japanese Patent No. 49548, there is a so-called pin tumbler lock provided with a plurality of code pins that are activated by key insertion and a plurality of driver pins that are in contact with the code pins and are constantly urged by a coil spring. The key used for is a so-called flat key plate. Alternatively, for example, as disclosed in JP-A-61-277782, there is a so-called radial type locking device in which pin tumblers are arranged in the circumferential direction of the rotor. The key used in such a lock device is cylindrical, and has a cutout portion of a key code formed at the leading edge of the key along the circumferential direction.

In addition, as described in Japanese Utility Model Laid-Open No. 2-4736, for example, there is a key having a circular step surface and a dedicated letter, and a pinter lock for such a key exists. This is because the center of the rotor of the cylinder lock is formed in a large hollow shape. The rod-shaped key can be inserted into this cavity. In such a pin tumbler lock, a so-called code pin that comes into contact with a key is subjected to a special processing. The special shape is a code pin having a head, and the head of the code pin is provided. Serves as a flange portion so as not to fall into the central cavity. As for cylinder locks used in automobiles, for example, as described in Japanese Utility Model Application Laid-Open No. 60-90659, a tumbler in contact with a key is a so-called disc tumbler. Since the key can be relatively short compared to the tumbler, it is effective for a device without space, and is also used for a coin locker.

[0004]

The pin tumblers of the pin tumbler lock are arranged along the longitudinal direction of the rotor and at a certain interval, so that, for example, ten pin tumblers are provided. If this is done, the locks and keys will inevitably become longer, so increasing the number of pin tumblers in this way will itself increase the size of the locks and keys, so the number of pin tumblers must be reduced. I don't get it. Therefore, there is a disadvantage that the key difference between keys is inevitably reduced. Further, as described above, no matter how many pin tumblers are provided, as in the case of another cylinder lock, if the key insertion opening forms a large cavity into which a bar-shaped key is inserted, it is extremely easy to use a picking tool. The major drawback is that it can be easily unlocked in a short time because it can be operated.

For example, when a cylindrical key having a cylindrical shape is used outdoors, rain and snow are likely to enter the cylindrical key and remain there. The vacuum pressure in the cylinder key is badly affected, and it is difficult to discharge it. Therefore, there is a disadvantage that the remaining water droplets rust and corrode the inside of the cylindrical key. In addition to the corrosion of the cylindrical key, if you use it without knowing that water droplets remain inside the cylindrical key, the water droplets will remain inside the cylinder lock and penetrate deeply, so the coil spring and pin tambu will rust and corrode There is a drawback that.

The object of the present invention is to eliminate such a drawback by rotating the rotor with a short cylindrical key by making the key cylindrical and arranging a number of pin tambou in parallel with the cylinder lock in an inclined manner. It is another object of the present invention to make it possible to easily discharge a puddle entering the cylindrical key.

[0007]

SUMMARY OF THE INVENTION In order to achieve such an object, the present invention forms a support shaft and a locking portion which is positioned substantially in the center of a cylinder lock and engages with a cylindrical key. A rotor having a space around the rotor, a plurality of code pins having the rotor and the rotor arranged obliquely along the longitudinal direction of the rotor, and having a tip mounted on the support shaft, contacting the code pin, and contacting the coil spring. A cylinder lock composed of a plurality of driver pins that are constantly urged, a case accommodating the driver pin and the coil spring along the longitudinal direction, a cylindrical key that can be inserted into and removed from the cylinder lock; An engaging portion is formed along the longitudinal direction, and the engaging portion can be engaged with a locking portion formed on the rotor and serves as a guide, and a plurality of concave portions are formed along the longitudinal direction of the cylindrical key. And when the cylindrical key is inserted into the cylinder lock, the code pins are each in the unlocking position, and are formed in the base 4 of the cylindrical key K, and a through hole is formed in the base of the cylindrical key. An object of the present invention is to allow air to flow in through the through-holes, easily discharge water in the cylindrical key, and prevent rust.

[0008]

A support shaft, which is located approximately at the center and forms a locking portion that engages with the cylindrical key, a rotor that forms a space portion around the support shaft, and a plurality of rotors along the longitudinal direction of the rotor. Since the code pins are arranged side by side in an inclined manner and the tip of the code pin is placed on the support shaft, the cylinder lock can be shortened as a whole, and it is difficult to insert the picking tool. It is possible to prevent unlocking by operation. Furthermore, a through hole is formed at the base of the cylindrical key, and air can flow in through the through hole, and water can easily be discharged from the cylindrical key to prevent rust. It is advantageous in that the cylinder lock and the cylinder key can be downsized.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cylinder key of a cylinder lock according to the present invention will be described below with reference to the drawings. 1 is a perspective view of a cylinder lock A and a cylinder key K of the present invention, and FIG. 2 is a side view of the cylinder key K of the present invention. FIG. 3 is a left side view of the cylindrical key K of the present invention shown in FIG. 2, and FIG. 4 is a front view showing a part of the cylinder lock A of the present invention by imaginary lines.

The cylinder lock A of the present invention and the cylinder key K which is inserted into and removed from the cylinder lock A and which has a through hole 6 formed in the base 5 of the cylinder key K will be described below. An annular key insertion opening 21 into and from which a cylindrical key K is inserted and removed in a case C, and a rotor 20 having a circular support shaft 22 facing the key insertion opening 21 are rotatably fitted. Further, the cylindrical key K having a cylindrical shape is provided with an engaging portion 10 along the longitudinal direction of the cylindrical shape.
And a plurality of recesses 11 are formed respectively, and a knob 4 to be gripped by hand is formed at one end of the cylindrical key K.

Further, the cylinder lock A and the cylindrical key K according to the present invention will be described in more detail. The case C is formed substantially at the center and forms a locking portion 23 engaging with the cylindrical key K, a support shaft 22, and A rotor 20 having a cylindrical key insertion opening 21 having a space around the support shaft 22 is fitted. Further, a plurality of code pins 1 are provided in the rotor 20 so as to be juxtaposed in the inclined direction along the longitudinal direction of the rotor 20 and to have the tip mounted on the support shaft 22. The rotor 20 assembled as described above is inserted into the case C, and furthermore, the driver pin 2 arranged to be in contact with and separated from the code pin 1 respectively, and the hole 3 for forming the coil spring S which constantly urges the coil pin S in the case C. Housed in.

Further, the engaging portion 10 is formed along the longitudinal direction of the cylindrical key K, and the engaging portion 23 forming the engaging portion 10 on the rotor 20 serves as a guide when the cylindrical key K is inserted. In addition, when the cylindrical key K is rotated, the rotor 20 can be rotated together with the cylindrical key K due to the engagement relationship between the engaging portion 10 of the cylindrical key K and the locking portion 20b of the rotor 20. Further, a plurality of recesses 11 are formed along the longitudinal direction of the cylindrical key K, and when the cylindrical key K is further inserted into the rotor 20, the code pins 1 are respectively unlocked, and the base of the cylindrical key K is Through holes 6 are formed in the five portions. Since air is allowed to flow in through the through hole 5 and the water pool in the cylindrical key K can be easily discharged, rust can be prevented in advance.

On the cylinder lock A side, the locking portions 23 of the rotor 20 are located on the center line of the support shaft 22, respectively, so that the cylindrical key K can be inserted. Locking part 23
Are formed on both sides of the code pin 30. Since the locking portion 23 is located near the cord pin 30 in this manner, it is difficult to insert a picking tool. Further, a protruding shaft 24 of a rectangular lock is formed integrally with the rotor 20 at the rear portion of the rotor 20, and a cam (not shown) is fixed to the protruding shaft 24. When each of the recesses 11 formed in the cylindrical key K is a so-called reversible reversible key when the cylindrical key K is used, when the cylindrical key K is a reversible key which can be inverted, the depth of each recess is individually set on a diagonal line of the cylindrical key K. The size is the same.

[0014]

As described above, according to the present invention, there are provided a locking portion which is located substantially at the center of a cylinder lock and engages with a cylindrical key, a rotor having a support shaft and a space around the support shaft, and a rotor having the same. A plurality of code pins that are arranged side by side in a slanting manner along the longitudinal direction of the device and whose tips are mounted on a support shaft, a plurality of driver pins that come into contact with the code pins and are constantly urged by a coil spring, and the driver pins and the coils A cylinder lock comprising a rotor case accommodating the spring along the longitudinal direction, a cylindrical cylindrical key which can be inserted into and removed from the cylinder lock, and an engaging portion formed along the longitudinal direction of the cylindrical key; When the engaging portion is disengageable from the engaging portion formed on the rotor, a plurality of recesses are formed along the longitudinal direction of the cylindrical key, and when the cylindrical key is inserted into the cylinder lock, Each of the code pins is in the unlocking position, and a through hole is formed in the base 4 of the cylindrical key K and a through hole is formed in the base of the cylindrical key. Easily, preventing rust, increasing the number of key differences, shortening the overall length of the cylinder lock and cylinder key, making it difficult to insert a picking tool. It has a beneficial effect in that it can be prevented.

[Brief description of the drawings]

The figure shows an embodiment of a cylindrical key of a cylinder lock according to the present invention.

FIG. 1 is a perspective view of a cylinder lock and a cylindrical key according to the present invention.

FIG. 2 is a side view of a cylindrical key according to the present invention.

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a front view partially showing the inside of the cylinder lock of the present invention by phantom lines;

[Explanation of symbols]

 A: Cylinder lock C: Case K: Cylindrical key S: Coil spring 1 ... Cord pin 2 ... Driver pin 3 ... Small hole 4 ... Knob 5 ... Base 6 ... Through hole 10 ... Engagement part 11 ... Recess 20 ... Rotor 21 ... Key insertion port 22 ... Support shaft 23 ... Locking part 24 ... Projecting shaft

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A locking portion which is located substantially in the center of a cylinder lock and which engages with a cylindrical key, a rotor which forms a support shaft and has a space around the support shaft, and the rotor and the longitudinal direction of the rotor. A plurality of code pins, which are arranged side by side in an inclined manner along the direction and the tips of which are placed on the support shaft, a plurality of driver pins that come into contact with the code pins and are constantly urged by the coil spring, and the driver pin and the coil spring A cylinder lock consisting of a case that is housed along the longitudinal direction, a cylindrical cylindrical key that can be inserted into and removed from the cylinder lock, and an engaging portion is formed along the longitudinal direction of the cylindrical key.
When the engaging portion is engageable with the locking portion formed on the rotor and serves as a guide, and a plurality of recesses are formed along the longitudinal direction of the cylindrical key, and the cylindrical key is inserted into the rotor, Each of the code pins is in the unlocked position, and a through hole is formed at the base of the cylindrical key. Air flows in through the through hole, and the water in the cylindrical key is easily discharged to prevent rust. The cylinder key of the cylinder lock characterized by