JP2001040916A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder lock that is easy to manufacture. SOLUTION: This cylinder lock has: a rotor 2 which is freely rotatable within a case 1; a pair of tumblers 9 comprising a pair of inner tumblers 4 freely relatively movably passed through a pair of outer tumblers 3 such that when a true key is inserted into a key insertion groove in the rotor 2, a parting face between the pairs of tumblers 3, 4 coincides with the rotation boundary face between the rotor 2 and the case 1; and a coil spring device 10 for energizing the pair of tumblers 9 toward the key insertion groove to inhibit rotation of the rotor 2 by moving the parting face from the rotation boundary face 8 when the true key is not inserted. The coil spring device 10 comprises a large diameter coil part 12 corresponding to the pair of outer tumblers 3 and a small diameter coil part 13 corresponding to the pair of inner tumblers 4, the coil parts 12, 13 being connected to each other at a common end turn part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cylinder lock.

[0002]

2. Description of the Related Art A cylinder lock which has a double structure of a tumbler for inhibiting rotation of a rotor with respect to a case to make picking (illegal unlocking) operation difficult is disclosed in JP-A-10-306.
No. 633 is known. In this conventional example, the tumbler is configured by overlapping a driving side and a driven side. The driving side is formed by inserting the inner driving pin in the outer driving pin, and the driven side is formed by inserting the inner driven pin in the outer driven pin so as to be relatively movable, and the inner and outer driving pins are formed by separately arranged compression springs of the rotor. It is urged to the key insertion groove side.

However, in the above-described conventional example, two types of compression springs having different center diameters are required to apply independent biasing forces to the outer driving pin and the inner driving pin, so that it is difficult to manage parts and to manufacture the apparatus. Also has the disadvantage of being cumbersome.

In order to apply a biasing force separately to the outer cylinder of the movable portion having a double structure and the sliding member in the outer cylinder, two kinds of coil springs having different diameters as described above are used. There is a problem that mounting is required, and both workability and parts management become troublesome.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and has as its object to provide a cylinder lock which can be easily manufactured. Another object of the present invention is to
Another object of the present invention is to provide a coil spring device for a cylinder lock that can be used for the cylinder lock, and further provides a coil spring device that can individually apply a biasing force to a tube body and a slide rod holding a sliding rod therein. For the purpose of providing.

[0006]

According to the present invention, the above object is achieved by inserting a rotor 2 rotatable in a case 1 and an inner tumbler pair 4 in an outer tumbler pair 3 so as to be relatively movable. When the genuine key 6 is inserted into the key insertion groove 5, the dividing surfaces 3a, 4
The tumbler pair 9 whose a coincides with the rotation boundary surface 8 between the rotor 2 and the case 1 and the tumbler pair 9 are urged toward the key insertion groove 5 side, and the division surfaces 3a and 4a are rotated with the rotation boundary surface in a state where the genuine key is not inserted. And a coil spring device 10 that prohibits rotation of the rotor 2 by displacing the large-diameter coil portion 12 corresponding to the outer tumbler pair 3 and the inner tumbler pair 4 in the common end turn portion 11. This is achieved by providing a cylinder lock to which the small-diameter coil portion 13 is connected.

A tumbler pair 9 is accommodated in the case 1 and the rotor 2 rotatable in the case 1, and when the divided surfaces 3 a, 4 a of the tumbler pair 9 coincide with the outer periphery (rotation boundary surface 8) of the rotor 2. Since one of the tumbler pairs 9 stays in the case 1 and the other can rotate together with the rotor 2, the rotation operation on the rotor 2 is allowed (unlocked state). On the other hand, when the divided surfaces 3a and 4a do not coincide with the outer periphery of the rotor 2, one of the tumbler pairs 9 jumps out to the rotation boundary surface 8 to inhibit the rotation of the rotor 2 (locked state). Tumbler vs. 9
Are formed by inserting the inner tumbler pair 4 into the outer tumbler pair 3 so as to be relatively movable.
0, the key insertion groove 5 side, that is, the divided surfaces 3a, 4a
Is biased to a position deviated from the rotation boundary surface 8.

When the genuine key is not inserted, the tumbler pair 9 is operated to rotate the rotor 2 (picking operation).
For this purpose, it is necessary to make the division surfaces 3a, 4a of both the inner tumbler pair 4 and the outer tumbler pair 3 coincide with the rotation boundary surface 8, so that the picking operation becomes difficult.

The coil spring device 10 for urging the inner tumbler pair 4 and the outer tumbler pair 3 separately includes a large-diameter coil portion 12 corresponding to the outer tumbler pair 3 and a small-diameter coil corresponding to the inner tumbler pair 4. It has a part 13. The small-diameter coil portion 13 and the large-diameter coil portion 12 are connected only at the common end winding portion 11, and each coil portion 1
As shown in FIG. 6B, the free ends of the small-diameter coil portion 13 (opposite ends of the common end winding portion 11) from the no-load state shown in FIG. When a compressive load FS is applied to the small-diameter coil portion 13, the spring characteristic according to the main point of the small-diameter coil portion 13 is exhibited without being affected by the main portion of the outer-diameter coil portion, and as shown in FIG. When a compressive load FL is applied to the free end of the coil part 12, the spring characteristic according to the key point of the large-diameter coil part 12 is exhibited without being affected by the key point of the small-diameter coil part 13, and two individual coils are separately provided. Exactly the same spring performance can be exhibited when a coil spring is mounted. Further, since the small-diameter coil portion 13 and the large-diameter coil portion 12 are connected and integrated by the common end winding portion 11, the handling is simple and the production efficiency of the cylinder can be improved.

The coil spring device 10 is formed of a single spring wire and extends from one end of the small-diameter coil portion 13 to the other end of the small-diameter coil portion 13 from the outer diameter of the small-diameter coil portion 13. Large-diameter coil section 12 with a large inner diameter
Can be used.

The coil spring device 10 can be used for various articles other than the cylinder lock. For example, as shown in FIG. 7, an outer cylinder member 15 is slidably inserted into an appropriate base 14, and In the driving mechanism component in which the sliding member 16 is further slidably inserted into the cylindrical member 15, the outer cylindrical member 1
5 and the sliding member 16 can be widely used for individually applying an urging force in the same direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a cylinder lock A has a rotor 2 rotatably inserted into a case 1. FIG. A long key insertion groove 5 is formed in the center of the rotor 2 in the direction of the rotation axis, and the key 6 can be inserted from the tip. Further, the rotor 2 is provided with a tumbler insertion hole 17 that is arranged in a plane orthogonal to the rotation axis and has one end communicating with the key insertion groove 5.

On the other hand, the case 1 has the tumbler insertion hole 1
A pin insertion hole 18 having substantially the same diameter as the diameter of the pin 7 is provided. As shown in FIG. 2, the pin insertion hole 18 communicates with the tumbler insertion hole 17 in a straight line at a position where the rotor 2 is rotated by a predetermined angle, and the tumbler insertion hole 17 and the pin insertion hole 18 in the communication state are paired with a tumbler pair. 9 are accommodated.

The tumbler pair 9 includes the outer tumbler pin 1.
9 is composed of an outer tumbler pair 3 in which outer drive pins 20 are arranged, and an inner tumbler pair 4 in which inner drive pins 22 are arranged in inner tumbler pins 21. The inner tumbler pair 4 is slidable in the outer tumbler pair 3. Is inserted into. The inner tumbler pin 21 and the outer tumbler pin 19 are arranged with one end exposed in the key insertion groove 5.
The inner drive pin 22 and the outer drive pin 20 are arranged such that one end is brought into contact with the other end of each of the first and the first 19 and the other end faces the outer peripheral side of the case 1.

The outer tumbler pin 19 has a large-diameter portion 19a substantially corresponding to the outer diameter of the outer drive pin 20 formed in a cylindrical shape, and a small-diameter portion 19b formed at the tip of the key insertion groove 5 side. Then, as shown in FIG.
By making the step 19c at the boundary between the large diameter portion 19a and the small diameter portion 19b abut against the step 17a of the tumbler insertion hole 17,
The size of the protrusion into the key insertion groove 5 is restricted. The outer tumbler pin 19 has one end opened to the outer drive pin 20 side, a large-diameter hollow portion 19d through which the outer drive pin 20 can be inserted, and one end opened to the key insertion groove 5 side. Small diameter portion 21a of tumbler pin 21
Is formed with a small-diameter hollow portion 19e through which is inserted. An intermediate hollow portion 19f whose outer diameter takes an intermediate value between the large-diameter hollow portion 19d and the small-diameter hollow portion 19e is formed between the large-diameter hollow portion 19d and the small-diameter hollow portion 19e. A stopper step 19g is formed at the boundary between the large-diameter hollow portion 19d.

The inner drive pin 22 is a solid cylindrical body provided with a spring accommodating recess 22 a opened to the outer peripheral side of the case 1, and enters from the hollow portion of the outer drive pin 20 into the large-diameter hollow portion 19 d of the outer tumbler pin 19. can do. The inner tumbler pin 21 is a stepped pin having a head portion 21b at one end that can be inserted into the large-diameter hollow portion 19d of the outer tumbler pin 19, and a small-diameter portion 21a at the other end. The head portion 21b and the small-diameter portion 21a are mounted in such a manner that they are exposed from the small-diameter hollow portion 19e of the outer
The protrusion 21c of the key insertion groove 5 is regulated by bringing the step 21c into contact with the stopper step 19g.

The tumbler pair 9 is urged toward the key insertion groove 5 by the coil spring device 10. Coil spring device 10
Is formed by connecting the large-diameter coil portion 12 and the small-diameter coil portion 13 in the common end winding portion 11, as shown in FIG.
The large and small diameter coil portions 12 and 13 extend from the common end turn portion 11 in the same direction. Large diameter coil part 12 and small diameter coil part 1
3 is arranged concentrically, so that there is no mutual interference during expansion and contraction,
The outer diameter of the small-diameter coil section 13 is smaller than the inner diameter of the large-diameter coil section 12.

The large coil portion 1 in the common end winding portion 11
In order to connect the small-diameter coil section 13 to the large-diameter coil section 13, for example, the end-winding sections at one end of the large-diameter coil section 12 and the small-diameter coil section 13 which are separately manufactured may be joined by welding or the like. Is a small-diameter coil portion 13 made of one spring wire.
Then, the connecting portion 13a is pulled out from the end of the end winding portion of the small diameter coil portion 13 to form a common end winding portion 11 having the same diameter as the large diameter coil portion 12, and further, the common end winding portion 11 is formed.
From the large-diameter coil portion 1 so as to surround the small-diameter coil portion 13.
It is manufactured by winding 2. Further, in the illustrated example, the winding direction of the large-diameter coil section 12 and the small-diameter coil section 13 is opposite, that is, the large-diameter coil section 12 is right-handed and the small-diameter coil section 13 is left-handed, or vice versa.
As a result, the wire of the small-diameter coil portion 13 and the large-diameter coil portion 12
Therefore, the wire of the small-diameter coil portion 13 does not bite between the large-diameter coil portions 12.

The coil spring device 10 formed as described above has a small-diameter coil portion 1 at the opposite end of the common end turn portion 11.
3 and the free end of the large-diameter coil portion 12 are placed independently. As shown in FIG. 2, the coil spring device 10 inserts the free end of the small-diameter coil portion 13 into the spring accommodating recess 22 a of the inner drive pin 22 and inserts the free end of the large-diameter coil portion 12 into the outer drive pin 20. The common end turn 11 is pushed in by a plate 23 that closes the pin insertion hole 18, while the case 1 is attached in a state of contacting the end surface on the outer peripheral surface side.

Therefore, in this embodiment, when the key 6 is not inserted into the key insertion groove 5, FIG.
(A) As shown in FIG. 3, the outer tumbler pair 3 and the inner tumbler pair 4 are urged toward the key insertion groove 5 by the coil spring device 10, so that the outer tumbler pin 1
Reference numeral 9 denotes a step 19c at the boundary between the large-diameter portion 19a and the small-diameter portion 19b, which abuts against the step 17a of the tumbler insertion hole 17 so that the tip protrudes into the key insertion groove 5, and the inner tumbler pin 21 extends through the boundary step 21c. The tip projects into the key insertion groove 5 in contact with the stopper step 19g. In this state, the divided surfaces 3a, 4a of the outer tumbler pin 19 and the outer drive pin 20, and the inner tumbler pin 21 and the inner drive pin 22 are located on the outer peripheral surface of the rotor 2, that is, the rotational boundary surface 8 with the inner peripheral surface of the case 1. Since they do not match, the rotor 2 cannot be rotated. When the key 6 is inserted, the inner tumbler pair 4 and the outer tumbler pair 3 are rejected by the key 6 and are raised to the uneven height of the surface of the key 6, and if the inserted key 6 is authentic, FIG.
(B), as shown in FIG. 4, the outer tumbler pair 3 and the inner tumbler pair 4 are raised by the unevenness (cord dimples 24) so that the divided surfaces 3a and 4a coincide with the rotation boundary surface 8 of the rotor 2, The state shifts from the locked state to the unlocked state in which the rotation of the rotor 2 is allowed. FIG. 4 (b)
As shown in FIG. 2, the cord dimples 24 individually determine the amount of lifting of the outer tumbler pair 3, more precisely, the tip of the outer tumbler pin 19 and the tip of the inner tumbler pair 4, more precisely, the tip of the inner tumbler pin 21. It is formed in a possible concentric shape.

In the example shown, a plurality of pairs of the tumblers 9 are arranged corresponding to the front and back surfaces of the key 6 inserted into the key insertion groove 5. The tumbler pair 9 is used by selecting any one of several types having different lengths of the outer tumbler pin 19 and the inner tumbler pin 21, and the dividing surfaces 3 a, 4 a only when the cord dimple 24 of the corresponding key 6 is appropriate.
Correspond to the rotation boundary surface 8. The moving direction line (moving axis line 9a) of the tumbler pair 9 intersects the rotation center of the rotor 2 and the crossing angle with the surface of the key 6 is set to 90 °, but can be changed as appropriate. The rows of tumbler pairs 9 arranged on the front and back surfaces of 6 are aligned on a straight line, but may be arranged randomly.

The center 5a of the key insertion groove 5 in the width direction is deviated by δ from the rotation center of the rotor 2 so that the code can be detected even when the key 6 is turned upside down and inserted into the key insertion groove 5. (See FIG. 2) and the corresponding key 6
As shown in (b), the cord dimples 24 corresponding to both the intersection position of the tumbler pair 9 with the movement axis 9a and the position matching the intersection position with the movement axis when the key 6 is turned upside down. Is formed.

[0023]

As is apparent from the above description, according to the present invention, it is possible to obtain a cylinder lock which can be easily manufactured and a coil spring device for a cylinder lock which can simplify the manufacture of the cylinder lock. Further, it is possible to obtain a coil spring device capable of individually applying an urging force to the tubular body of the tubular body holding the sliding rod therein and the sliding rod.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the present invention.

FIG. 2 is a sectional view of a cylinder lock, where (a) is a sectional view of FIG.
FIG. 2B is a sectional view taken along line 2A, and FIG. 4B is a sectional view taken along line 2B-2B in FIG.

FIG. 3 is a sectional view of the cylinder lock in a state where a key is not inserted.

4A and 4B are views showing a state in which a genuine key is inserted, wherein FIG. 4A is a cross-sectional view and FIG. 4B is a front view of the key.

FIG. 5 is a view showing a coil spring device, (a) is a side view,
(B) is a view taken in the direction of the arrow 5B in (a), and (c) is a view in the direction of 5A in (a).
It is an arrow C view.

6A and 6B are diagrams showing the operation of the coil spring device, in which FIG. 6A shows a natural state, FIG. 6B shows a state in which a load is applied to a small-diameter coil portion, and FIG. It is a figure which shows the state which added.

FIG. 7 is a diagram showing another usage state of the coil spring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Rotor 3 Outer tumbler pair 3a Division surface 4 Inner tumbler pair 4a Division surface 5 Key insertion groove 6 Key 8 Rotation boundary surface 9 Tumbler pair 10 Coil spring device 11 Common end turn part 12 Large diameter coil part 13 Small diameter coil part

Claims (5)

[Claims] 1. A rotor rotatable in a case, and an inner tumbler pair are inserted into an outer tumbler pair so as to be relatively movable, and when a genuine key is inserted into a key insertion groove of the rotor, the rotor is inserted between the tumbler pairs. A tumbler pair whose division surface coincides with the rotation boundary surface between the rotor and the case, and the tumbler pair is urged toward the key insertion groove side, and the rotation of the rotor is prohibited by shifting the division surface from the rotation boundary surface when the genuine key is not inserted And a coil lock in which the large-diameter coil portion corresponding to the outer tumbler pair and the small-diameter coil portion corresponding to the inner tumbler pair are connected in the common end winding portion. 2. A tumbler pair in which an inner tumbler pair is relatively movably inserted into an outer tumbler pair is disposed on a rotating boundary surface between a case and a rotor rotatable in the case, and a dividing surface of each tumbler pair is a genuine key. A coil spring device for a cylinder lock used for a cylinder lock in which the rotation of the rotor is permitted when the rotor is aligned with the rotation boundary surface, comprising: a small-diameter coil portion for urging the inner tumbler pair toward the key insertion groove side; A coil spring device for a cylinder lock, comprising: a large-diameter coil portion for urging the tumbler pair toward the key insertion groove, wherein the small-diameter coil portion and the large-diameter coil portion are connected by a common end turn. 3. A large-diameter coil portion having an inner diameter larger than the outer diameter of the small-diameter coil portion is formed from one spring wire and extends from one end of the small-diameter coil portion to the other end side of the small-diameter coil portion. Winded coil spring device. 4. The coil spring device according to claim 3, wherein the winding directions of the small diameter coil portion and the large diameter coil portion are opposite. 5. After winding a small-diameter coil portion with a single spring wire, a common end turn portion having a large center diameter is formed at the end of winding, and thereafter, a free end of the small-diameter coil portion from the common end turn portion is formed. A method for manufacturing a coil spring device for winding a large-diameter coil portion having an inner diameter larger than the outer diameter of the small-diameter coil portion toward the coil.