JPH0345490Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Field of industrial application The invention relates to a cylinder lock. Specifically, for code pins arranged in multiple rows in an alternately staggered manner, one side bar is used to attach each code pin to a cylinder lock. This invention relates to a cylinder lock with a simple structure that can be engaged.

B. Conventional technology In a normal cylinder lock, an inner cylinder is inserted into an outer cylinder, and a pin and a driver are inserted between the outer cylinder and the inner cylinder. In the closed state, the driver crosses the outer cylinder and the inner cylinder and It is fixed so that it does not move, and by inserting a key, the boundary between the pin and driver is raised to the shear line of the inner and outer cylinders, allowing the inner cylinder to rotate freely.

Since such cylinder locks use a screwdriver and a pin, the outer cylinder inevitably has a large diameter, and it is difficult to obtain many different keys, so the pin must be pushed up while applying tension to the inner cylinder using a tool. It was possible to unlock the lock by turning the inner cylinder, so-called picking.

To prevent this and get many key differences,
This method requires a large number of parts and many processing steps, and therefore has the disadvantage that the product is expensive.

In addition, as a means to prevent the above-mentioned conventional drawbacks, a technology disclosed in Japanese Patent Application Laid-open No. 57-201472 has been developed, but the cylinder lock disclosed in this publication requires two side bars on the left and right. The structure was complicated and processing was difficult.

C. Problems that the invention aims to solve With such conventional cylinder locks, in order to obtain many different keys with one cylinder lock, the mechanism is inevitably complicated, large and expensive, and it is difficult to prevent picking. and impression prevention measures were not sufficient.

In addition, JP-A-Sho, which was proposed as an improvement measure for conventional products,
57-201472 requires detailed machining work, such as holding the split pins in parallel to the plate, cutting vertical grooves on the small pins, and drilling horizontal holes. However, since the side bars that engage with each pin are fitted from both sides, processing and assembly are troublesome, making it difficult to manufacture small cylinder locks and making the product expensive.

D. Means for solving the problem This invention was made to solve the problems of the conventional method. To provide a cylinder lock which is small and lightweight, can be mass-produced at low cost, can have many different keys, is difficult to pick and impress, and is easy to assemble by providing long and short pins or short stepped portions and long pins on the side bar. It is something.

In the locked state where the key 6 is not inserted, the ten cord pins 10 inserted into the pin holes 9 of the inner cylinder 2 are pushed down to the bottom of the pin holes 9 by the elastic force of the tumbler spring 17. ing. Further, since the protrusion 24 of the side bar 11 is fitted into the slot 23 of the outer cylinder 1 and is pressed outward by the coil spring 21, the inner cylinder 2 is in a non-rotating state.

When the key 6 is inserted into the key slot 7, the pin guide 14a at the tip of the key 6 comes into contact with the lower end of the code pin 10, and the code pin 10 is pushed into the tumbler spring 1.
Push up against the rebound force of 7. When the ten cord pins 10 are pushed up, the notches 15 cut into each cord pin 10 align horizontally in a straight line, and as a result, the step 19 of the side bar 11 or the pin 25 aligns with the cord pin in the front row. 10, while the pin 20 engages with the notch 15 of the code pin 10 in the rear row.
The elastic force of the coil spring 21, which was engaged with the side bar 11 and pressing the side bar 11 outward, is deenergized, and the inner cylinder 2 becomes rotatable. The lock is unlocked by this rotation of the inner cylinder 2.

F. Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The inner cylinder 2, which is rotatably inserted into the outer cylinder 1, has a disk-shaped front 3 protruding from its front surface, and a rectangular-fitting notched threaded rod on the rear surface of a relatively long cylindrical body 4. 5 is provided protrudingly.

A key slot 7 is cut from the lower surface of the front 3 of the inner cylinder 2 to the barrel 4, into which a key 6 shown in FIG. 9 is inserted.

A flat seat 8 is cut into the upper surface of the body 4 of the inner cylinder 2, and two rows of vertical pin holes 9 are drilled in parallel with each other in an alternately staggered manner from the seat 8. A cord pin 10 is inserted into the pin hole 9 in a vertically movable manner, and communicates with the key slot 7 at right angles.

A bar slot 12 into which a side bar 11 is fitted is cut into one side of the body 4 of the inner cylinder 2.

The key 6 inserted into the key slot 7 of the inner cylinder 2 is
As shown in FIGS. 9 and 10, it is formed in a U-shape, and has key threads 14 of different shapes continuously formed on two parallel key blades 13, 13, and has an obliquely cut pinky blade 14a at the tip. Each cord pin 10 of the same length inserted into the pin hole 9 of the seat 8 has a notch 15 of different heights approximately in the middle, as shown in FIGS. A prevention groove 16 is cut into the groove 16, and its tip is tapered so as to engage between the locks 14 of the key 6.

It is sufficient that there are at least two different heights of the code pins 10 in each row, but it is preferable that there be as many different heights as possible because more key differences can be obtained.

A tumbler spring 17 is inserted above the pin hole 9 into which the cord pin 10 is inserted, and is pressed from above by a cover 18 that fits into the seat 8.

Cover 18 that holds down the tumbler spring 17
By inserting the inner cylinder 2 into the outer cylinder 1, the elastic force of the tumbler spring 17 is applied downward.

As shown in FIGS. 6 and 7, the front surface of the side bar 11 that fits into the bar slot 12 of the barrel 4 is formed with a stepped portion 19 that engages with the notch 15 of the cord pin 10 in the front row (right side). , a pin 20 that is longer than the stepped portion 19 that engages with the notch 15 of the rear row (left side) cord pin 10 is provided protrudingly, and a hole 22 that receives one end of a coil spring 21 for rebounding;
22 are bored on both sides, and a protrusion 24 that fits into the slot 23 of the outer cylinder 1 is provided on the back side as shown in FIG.

The stepped portion 19 of the side bar 11 may be replaced with a short pin 25 that engages with the notch 15 of the cord pin 10 in the front row, as shown in FIG.

The notched threaded rod 5 on the rear surface of the inner cylinder 2 has first and second
As shown in the figure, a wave washer 27 is fitted via a cam 26 and a lever (not shown) and fastened with a nut 28.

The outer cylinder 1 into which the front 3 and body 4 of the inner cylinder 2 are inserted and fitted consists of a front ring 29 into which the front part of the inner cylinder 2 is fitted, and a notched threaded cylinder 30, as shown in FIG. As described above, the slot 23 into which the protrusion 24 of the side bar 11 fits is cut out on the inner surface, and the protrusion 32 into which the notch 31 of the cam 26 engages is formed on the rear surface. Numeral 33 is a nut for fixing the outer cylinder 1 to a door or the like.

The cylinder lock having such various parts is assembled as follows.

First, insert the 10 cord pins 1 into the pin holes 9 of the inner cylinder 2.
0, and insert the tumbler spring 17 into each pin hole 9 from above.

Next, the side bar 11 is fitted into the bar slot 12 of the inner cylinder 2 with the base ends of the coil springs 21, 21 inserted into the holes 22, 22 of the side bar 11.

Next, while holding the tumbler spring 17 with the cover 18, the inner cylinder 2 is inserted into the outer cylinder 1, aligning the protrusion 24 of the side bar 11 with the slot 23 of the outer cylinder 1.

Further, a cam 26, a wave washer 27, etc. are fitted into the notched threaded rod 5 of the inner cylinder 2, and fastened with a nut 28.

Attachment and fixation to a door or the like is performed using a nut 33.

In the cylinder lock assembled in this way, each code pin 10 is pushed down to the bottom of the pin hole 9 by the elastic force of the tumbler spring 17, and the protrusion 24 of the side bar 11 is fitted into the slot 23 of the outer cylinder 1. is pressed outward by the coil spring 21, and the inner cylinder 2
is in a locked state that does not rotate.

When the key 6 is inserted into the key slot 7 in this state, the pin guide 14a at the tip of the key 6 comes into contact with the lower end of the cord pin 10 and pushes up the cord pin 10 against the elastic force of the tumbler spring 17. Next, each code pin 10 is engaged between the locks 14 of the key 6 and fixed. When the ten code pins 10 are successively pushed up with the key 6 and engaged and fixed between the key threads 14, the notches 15 of each code pin 10 are laterally aligned in a straight line. As a result, the stepped portion 19 or pin 25 of the side bar 11 becomes the front row cord pin 10.
The long pin 20 is engaged with each notch 15 of the
engages with the notch 15 of the code pin 10 in the rear row,
The elastic force of the coil spring 21 is deenergized, and the inner cylinder 2 becomes rotatable.

The rotation range of the inner cylinder 2 is limited to approximately 90 degrees in the illustrated example due to the relationship between the notch 31 of the cam 26 and the protrusion 32 of the outer cylinder 1.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the tumbler spring 17 may be integrally attached to the cover 18, the cover 18 may be fitted and fixed to the seat 8, or the key 6 and the key slot 7 may be fixed.
Providing protrusions and slide slots to increase the number of different keys is included in the technical idea of the present invention.

G. Effects of the invention As described above, according to the cylinder lock according to the invention, it is possible to obtain a large number of different keys by combining a large number of key threads with different shapes and a large number of code pins with cutouts of different heights. , since only one side bar is required, the outer cylinder and inner cylinder require fewer machining steps, making it possible to manufacture them at low cost and making them smaller and lighter.Also, even if there is only one side bar, there are multiple rows of cord pins (two in the illustration). Since it is possible to arrange the cord pins in multiple rows, it is possible to effectively arrange a large number of cord pins in a small inner cylinder, and it also has effects such as being extremely effective in preventing impressions and picking.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view showing the relationship between the outer cylinder 1 and the inner cylinder 2;
The figure is an exploded perspective view of the inner tube 2, FIG. 3 is a partially cutaway side view of the outer tube 1, and FIG. 4 is a partially cutaway plan view of the inner tube 2.
5 is an enlarged front view showing one example of the cord pin 10, FIG. 6 is a plan view of the side bar 11, FIG. 7 is an enlarged sectional view taken along line 7-7 in FIG. 6, and FIG. 9 is a plan view showing another example of the side bar 11, and FIG. 9 is a plan view showing another example of the side bar 11.
10 is a perspective view of the key 6, and FIG. 11 is an enlarged sectional view of the key blade 13 portion of the key 6. Main symbols in the figure: 1...outer cylinder, 2...inner cylinder, 5...
...Notched threaded rod, 6...Key, 9...Pin hole, 1
0...Code pin, 11...Sidebar, 12...
...Birthlot, 13...Keyblade, 15...
...Notch, 17...Tumbler spring, 18...
...Cover, 19...Step, 20...Pin, 25...
...pin, 26...cam.

Claims (1)

[Scope of utility model registration request] A key slot 7 into which a plurality of key blades 13 are inserted is cut, and a plurality of rows of pin holes 9 corresponding to the key blades 13 are drilled in an alternately staggered manner, and a bar slot 12 is cut in the side surface and a bar slot 12 is cut in the rear surface. An inner cylinder 2 in which a notched threaded rod 5 is protruded, and an outer cylinder 1 in which a front ring 29 and a notched threaded cylinder 30 are connected are provided. Cord pins 10 of different sizes and tumbler springs 17 that press against the cord pins 10
Insert the bar slot 12 and cover it with the cover 18.
Step portion 19 or pin 25 that engages with notch 15 of cord pin 10 in the front row and cord pin 1 in the rear row
Insert the inner cylinder 2 fitted with the side bars 11 each having a pin 20 that engages with the notch 15 of 0 into the outer cylinder 1, and fit the cam 26 into the notch threaded rod 5 of the inner cylinder 2 and fix it. A cylinder lock characterized by: