JPH0426386B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylinder lock employing a novel mechanism.

The pin-tamper lock, which is often used as a typical example of conventional cylinder locks, has a driver pin positioned across the boundary between the inner and outer cylinders when the lock is locked, thereby preventing the inner cylinder from rotating relative to the outer cylinder. be. However, such a cylinder lock has a weakness when an unauthorized attempt is made to open the lock. One is that if the inner cylinder is forcibly turned with a tool, the lock will be damaged and destroyed.The other is that if the inner cylinder is forcibly turned with a tool, the lock will be damaged and destroyed. There is always the fear that the lock will be unlocked (by pushing the pin up).

The cylinder lock of this invention was developed to solve the above problems, and its inner cylinder can be rotated even in the locked state.
The internal pin is designed to never reach the unlocking position by picking.
And, the cylinder lock of the present invention is as follows: A to F.
It is characterized by having the following configuration conditions. That is, (A) a rotatable inner cylinder is attached to a fixed outer cylinder, (B) a movable operating piece is provided at the rear of the inner cylinder to operate the locking mechanism, ( C) The inner cylinder is provided with a key hole in its axial direction, and an arbitrary number of pin insertion holes facing the working part of the key inserted into the key hole; (D) Each pin insertion hole of the inner cylinder. (E) A groove is provided at an appropriate position in the inner cylinder, and a movable pin is inserted into the inner cylinder by forcing it inward. (F) The engaging piece is attached to the engaging recess of the pin and the notch of the operating piece at a position other than the insertion/extraction position of the key. selectively engages,
The six structural conditions are that a control means is provided between the outer cylinder and the inner cylinder to forcibly displace the engaging piece outward at the insertion/extraction position of the key.

The present invention will be explained below based on embodiments shown in the drawings.

Each member of the cylinder lock of the present invention is made of brass or other metal materials, hard synthetic resin materials, or the like.

In Figures 1 to 4, 1 is an outer cylinder of a cylinder lock that is attached to a door, etc., 2 is an inner cylinder rotatably mounted inside the outer cylinder 1, and 2a is a flange on the front of the inner cylinder 2. , 3 are discs fixed to the rear surface of the inner cylinder 2 by set screws 4, 4 to prevent them from coming off.

At the rear part of the inner cylinder 2, there is provided an operating piece 5 which is movable with respect to the inner cylinder 2 in order to operate the locking mechanism 17. The action piece 5 in the illustrated example is formed in the shape of a disc with a notch 5a, and is rotatably attached to the aforementioned retaining disc 3 by a pivot 6 which also serves as a set screw. The action of this action piece 5 will be described in detail later.

The inner cylinder 2 further has an axial direction (lengthwise direction)
A key hole 2b is provided, and an arbitrary number of pin insertion holes 2c facing the working portion 7a of the key 7 to be inserted into the key hole 2b are provided. The keyhole 2b and each pin insertion hole 2c are communicated with each other.

A pin 8 having an engaging recess 8a at a position corresponding to the working portion 7a of the key 7 is inserted into each of the pin insertion holes 2c while being urged inward by a compression coil spring 9 or the like. 10 is each pin insertion hole 2c of the inner cylinder 2
This is a stop plate for holding down the pin 8 and spring 9 inserted therein, and is fitted into a dovetail groove 2d formed in the inner cylinder 2. The number of pins 8 usually corresponds to the number of pin insertion holes 2c, and the engagement recesses 8a (small diameter portions) of each pin 8 are provided at different positions in the length direction. The engagement recesses 8a are formed so that when the pins 8 are pushed by inserting the key 7, they align linearly, for example. Although a spring 9 is employed as a biasing means for the pin 8 in the embodiment,
Magnetic means may also be employed. Although it is advantageous for the pin 8 and the pin insertion hole 2c to have a circular cross-sectional shape in terms of manufacturing, they may be polygonal.

In FIGS. 2 and 3, reference numeral 11 indicates the inner cylinder 2.
It is an engaging piece that is movably held at an appropriate position.
For example, a groove 2e is provided in the inner cylinder 2 at a position substantially perpendicular to the axial direction of the pin 8, and the groove 2e
toward the inside of the inner cylinder 2 (almost toward the central axis)
The biased engagement piece 11 is displaceably mounted. In the illustrated example, the inward biasing force is generated by inserting a compression coil spring and a sphere 13 into two spring insertion holes 11a provided on the outside of the engagement piece 11, and inserting a compression coil spring and a sphere 13 into each spring 12 through the sphere 13. The pressure is applied by pressing the inner wall of the outer cylinder 1 with the inner wall of the outer cylinder 1. Said sphere 13
is inserted to facilitate the rotation of the inner cylinder 2 relative to the outer cylinder 1. The aforementioned engagement piece 11
The biasing force can also be applied by magnetic force means.

The rear end portion 11b of the engaging piece 11 projects rearward through a notch 3a provided in the retaining disc 3 of the inner cylinder 2, and selectively engages with the notch 5a of the above-mentioned operating piece 5. It is made so that it can be combined.

Further, an engaging portion 1 that can be selectively fitted into the recess 8a of the pin 8 is provided on the inner side of the engaging piece 11.
1d. The recess 8a of the pin 8 and the engaging portion 1
1d means that when the inner cylinder 2 is rotated and displaced with the key 7 inserted into the inner cylinder 2, the key 7 is inserted at a position other than the insertion/removal position. That is, a control means 14 is provided between the engagement piece 11 in the inner cylinder 2 and the outer cylinder 1, and the control means 14 locks the inner cylinder 2.
When the inner cylinder 2 is rotated and displaced with the
At the insertion/extraction position of the key 7, the engagement piece 1 overcomes the biasing force of the compression coil spring 12, etc.
1 is forcibly displaced outward, but the engagement piece 11 does not work at other displacement positions, and the engagement piece 11 is urged inward and engaged with the recess 8a of the pin 8. The illustrated control means 14 includes a magnet 14a that is fitted and fixed in a predetermined position of the outer cylinder 1, and a magnet 14b that is fitted and lowered on the outer side of the engagement piece 11 in the inner cylinder 2. 1a, 11
C is a fitting hole into which the magnets 14a and 14b are respectively fixedly attached.

In FIG. 2, numerals 15 and 16 respectively indicate a trochanter and a compression coil spring inserted into a bottomed hole (not shown) formed at a proper position in the inner cylinder 2,
The trochanter 15 contacts the inner surface of the outer cylinder 1 while being pressed by a spring 16, and is connected to the inner cylinder 2 with a hook 7 against the outer cylinder 1.
When the key 7 is rotated, the trochanter 15 fits into a recess (not shown) provided in the outer cylinder 1, so that the insertion position and the extraction position of the key 7 can be sensed by touch. . This position sensing means is known from the prior art.

In addition, when a magnetic force means is used as a biasing means in the cylinder lock of this invention, surrounding members that are not involved in the magnetic force means are
Needless to say, a non-magnetic material such as aluminum or synthetic resin may be used.

Next, the operation of the cylinder lock of the present invention having the above structure will be explained with reference to FIGS. 3 to 9.

3 to 5 show the state before the key 7 is inserted. In this state, the engagement recesses 8 of the plurality of pins 8
a are positioned with a difference in level, in other words, they are not aligned in a straight line. Since the magnet 14a on the outer cylinder 1 and the magnet 14b on the engagement piece 11 in the inner cylinder 2 are close to each other, the control means 1
4 acts (different polarity S of both magnets 14a, 14b,
The engaging piece 11 is attracted to the outside due to the attraction between N and N, and the engaging piece 11 is not engaged with the working piece 5 at the rear portion of the inner cylinder 2.

Now, if you insert the key 7 from the keyhole 2b,
As shown in FIGS. 6 and 7, the active part 7a of the hook 7 (this active part can be optional, such as using a hook or magnetic means) displaces each pin 8 against the spring 9. Therefore, the recesses 8a of each pin 8 are linearly aligned. By the way, in the state where the lock 7 is inserted, the engagement piece 11 has two magnets 14a,
Since the attractive force of the compression coil springs 14b overcomes the elastic force of the compression coil springs 12 and is pulled outward, the state continues as it is, that is, the engagement portions 11d of the engagement pieces 11 engage with the aligned recesses 8a. Maintain the state of not doing so.

Next, when the key 7 is rotated clockwise or counterclockwise, the inner cylinder 2 is rotationally displaced together with the engagement piece 11, as shown in FIGS. 8 and 9. Along with the rotational displacement, the magnet 14b on the engagement piece 11 is separated from the magnet 14a provided on the outer cylinder 1 in accordance with the insertion/extraction position of the key 7, and the control means 14 is separated from the magnet 14a provided on the outer cylinder 1.
is in a non-actuated state, and the engagement piece 11 is in the spring 12,1
It is displaced inward by the urging force of 2.

Here, the engaging portion 11d at the inner end of the engaging piece 11 fits into the engaging recess 8a where the plurality of pins 8 are aligned,
Further, the rear end portion 11b of the engagement piece 11 engages with the notch 5a of the action piece 5. Therefore, if the key 7 continues to rotate, the engaging piece 11 and the operating piece 5 in the engaged state will both be rotationally displaced, causing the locking mechanism linked to the operating piece 5 to reach the locked state. Tokoro. In addition, in FIGS. 4 and 6, the reference numeral 1
Reference numeral 7 indicates a connecting member that is fixed to the operating piece 5 and forms a part of the locking mechanism.

After locking, if the key 7 is returned to the original insertion position, that is, the extraction position, each member of the cylinder lock returns to its original position, so the key 7 can be extracted. To unlock the lock, the key 7 inserted into the keyhole 2b may be rotated in the opposite direction to the locking direction, and the lock mechanism can be opened in the same manner as described above.

Note that when different keys are inserted into the cylinder lock of the present invention, the inner cylinder 2 can always be rotated, but since the engaging recesses 8a of each pin 8 are not aligned, the inner end of the engaging piece 11 The engaging portion 11d always collides with the large diameter portion of at least one pin 8,
At any rotational displacement position of the inner cylinder 2, the engagement piece 11 will not be displaced inward. Therefore,
The engagement piece 11 is not engaged with the action piece 5 and is in a state where it can idle relative to the inner cylinder 1, so that the locking mechanism naturally does not receive any action.

According to the cylinder lock of the present invention described above, the engaging piece 11 provided in the inner cylinder 2 for selectively connecting the pin 8 and the operating piece 5 is used only when the locking mechanism is actuated. Since the inner cylinder 2 is always allowed to freely rotate relative to the outer cylinder 1 by engaging with the pin 8 and the action piece 5, even if the inner cylinder 2 is subjected to forcible rotation by unauthorized persons, The inner cylinder 2 does not damage the lock simply by idling, and has the effect of completely preventing picking.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the cylinder lock of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a vertical cross-sectional plan view according to Fig. 1- in a state where the key is not inserted, and Fig. 4 is Similarly, FIG. 1 is a vertical cross-sectional side view taken along lines, FIG. 5 is a cross-sectional front view taken along FIG. 3 lines, FIG. 6 is a vertical side view with the key inserted, FIG. Fig. 8 is a longitudinal sectional plan view showing the state in which the inserted key is rotated, and Fig. 9 is a longitudinal plan view of the inserted key.
It is a cross-sectional front view taken by a line. 1... Outer cylinder, 2... Inner cylinder, 2b... Key hole, 2c... Pin insertion hole, 2e... Groove, 5... Action piece, 7... Key, 7
a... Key action portion, 8... Pin, 8a... Engagement recess, 11... Engagement piece, 14... Control means.

Claims (1)

[Scope of Claims] 1. A cylinder lock characterized by having the following structural conditions A, B, C, D, E, and F. A. A rotatable inner tube 2 is attached to a fixed outer tube 1. B. A movable operating piece 5 is provided at the rear of the inner tube 2 to operate the locking mechanism. C. The inner cylinder 2 is provided with a keyhole 2b in its axial direction, and an arbitrary number of pin insertion holes 2 facing the working part 7a of the key 7 inserted into the keyhole 2b.
D. Into each pin insertion hole 2c of the inner cylinder 2, a pin 8 having an engaging recess 8a at a position corresponding to the operating portion 7a of the key 7 is inserted while being biased inward. , E. A groove 2e is provided at an appropriate position in the inner cylinder 2, and the movable engagement piece 11 is biased toward the inside of the inner cylinder 2 and attached to the groove 2e. Engagement recess 8 of pin 8
a and the notch 5a of the above-mentioned operating piece 5 at a position other than the insertion/removal position of the key 7, and between the outer cylinder 1 and the inner cylinder 2, at the insertion/removal position of the key 7, A control means 14 for forcibly displacing the engaging piece 11 outward is provided.