JPH0745787B2 - Cylinder lock and key combination device with changeable code - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock / key combination device capable of changing a code of a cylinder lock by inserting / removing a key. Is.

[Prior Art] Conventionally, when a main part of a cylinder lock of this type is illustrated in a cross-sectional view, a cylinder lock as shown in Fig. 4 is known.
This has a steel ball 11 'between the code pin 7 and the driver pin 5, and normally uses a key K having a narrow key width as shown in FIG. 4 (a). If the key K is lost, use K ₁ having a wide key width as shown in FIG. 4 (b). Since the width of this key K ₁ is widened by the amount corresponding to the diameter of the steel ball 11 ′, as shown in FIG. 4 (b), move the steel ball 11 ′ into the case 1 against the spring 4. While still in this position, temporarily turn this key K ₁ counterclockwise and
When K ₁ is returned to its original position (Fig. 4 (c)), the steel ball 11 'falls into the hole 8 of the rotor 2 during the rotating operation of the key K ₁ . Therefore, if another new key K ₁ is used, the code of the cylinder lock S is changed, and the old key K having a narrow width cannot be operated. Thus, there is a cylinder lock S that enables the new key to be used without replacing the cylinder lock.

[Problems to be solved by the invention]

In the prior art, since the rotor has a hole for accommodating the steel ball, when the key is rotated, if the depth of this hole is slightly shallow, the steel ball will be attached to the inner wall surface of the case. As a result, the frictional resistance is generated when the key is rotated. If you deepen this hole again,
Even with a duplicate key, the driver pin enters the hole of the rotor accommodating the code pin across the shear line, making the key rotation operation impossible and producing many defective products due to accuracy variations. there were.

An object of the present invention is to insert a key into a rotor and then rotate the key to remove the key from the rotor so that the code can be changed without replacing the cylinder lock and the key can be smoothly rotated. To be able to do it.

[Means for solving problems]

In order to achieve the above object, the present invention inserts a driver pin into a driver pin hole provided in a cylindrical case and a spring for urging the driver pin in a direction projecting from an inner peripheral surface of the case, The rotor rotatably fitted in the case is provided with a key hole having an opening edge on the outer peripheral surface of the rotor and a code pin hole that intersects the key hole at a substantially right angle and faces the driver pin hole when locked. A cylinder lock formed by inserting a code pin into the code pin hole, and inserting a code changing member having a diameter smaller than the diameter of the driver pin between the code pin and the driver pin; A key that forms a shear line between the code changing member and the driver pin when inserted into the hole, and an end face of the code pin when inserted into the key hole. New cord formed in a shape that pushes up to the cord line and has a notch hole having a diameter smaller than the diameter of the driver pin and having a depth into which the cord changing member can be inserted, at the end on the opening edge side. With the key, a cylinder lock and key combination device with a changeable code was constructed.

The driver pin may have a flat end surface in the biased direction.

[Action]

The operation of the present invention will be described with reference to the cross-sectional views on the cylinder S shown in FIGS.

Figure 1 (a) is a state where the insertion of the following new code key K ₁ after lost key keyhole 9 of the rotor, rotating the rotor 2 from this state in the direction of the arrow in FIG. (B) And let the key
The cord conversion member 11 fits into the notch hole 13 of K ₁ , but the notch hole
13 is a diameter smaller than the diameter of the driver pin 5, and
Since the end surface of the driver pin 5 is a flat surface, the end surface of the driver pin 5 does not go inside the outer peripheral surface (shear line) of the rotor 2. Therefore, frictional resistance does not occur during the pivoting operation of the key K _{1, and} the pivoting operation does not become heavy.
When the rotor 2 is rotated in the direction of the arrow in the next figure (c) from the state in which the code changing member 11 is fitted in the cutout hole 13 of the key K in this way, and the key K ₁ is pulled out from the rotor 2 from this state. The code changing member 11 can be removed from the rotor 2 together with the key K ₁ .

〔Example〕

 Examples of the present invention will be described below.

In the figure, S is a cylinder lock, and a rotatable rotor 2 is fitted into a cylindrical case 1 forming the cylinder lock S. A plurality of driver pin holes 3 are formed in the case 1, and a spring 4 and a spring 4 are formed in the holes.
And a driver pin 5 that is biased by the driver pin 5 are housed in the rotor 2. Further, a case cover 6 is fitted on the outer peripheral portion of the case 1 so that the spring 4 and the driver pin 5 are not accidentally pulled out from the code pin hole 8 of the rotor 2. A plurality of code pin holes 8 formed in the rotor 2 rotatably fitted in the case 1 accommodates a plurality of code pins 7 and is interposed at least between the code pins 7 and the driver pin 5. A code changing member 11 such as a dish or a steel ball, together with the code pin 7, has a code pin hole 8 in the rotor 2.
In one of the. The diameter of the cord changing member 11 is smaller than the diameter of the driver pin 7. A key hole 9 for inserting and removing the key K ₁ is formed in the rotor 2, and an opening edge 9 ′ of the key hole 9 is located on the surface where the case 1 and the rotor 2 come into contact with each other, that is, the shear line l. It is in a positional relationship where it intersects with the code pin hole 8 that houses the code pin 7. Also, the key K ₁ that is inserted into and removed from the keyhole 9 of the rotor 2
Is a plurality of recessed holes 10 with which the code pins 7 contact, and the recessed holes 10
Notch hole 13 where the cord changing member 11 falls at the position intersecting with
The cutout hole 13 has a diameter smaller than that of the driver pin 5. With various keys in which the depth of the notch hole 13 is appropriately changed, the number of the code changing members 11 to be removed can be arbitrarily changed by appropriately increasing or decreasing the number of the code changing members 11.

〔The invention's effect〕

The present invention, between the code pin and the driver pin,
A cord changing member having a diameter smaller than the diameter of the driver pin is inserted, and a notch hole having a diameter smaller than the diameter of the driver pin and having a depth into which the cord changing member can be inserted is inserted into the new code key. By providing the above, the conventional problem that the code changing member interferes with the inner surface of the case and the driver pin interferes with the rotor during the code conversion operation is solved.

If the tip end surface of the driver pin in the biased direction is made flat, there is no possibility that the driver pin will cross the shear line, and the rotation of the rotor will be extremely light.

[Brief description of drawings]

FIGS. 1 (a), (b) and (c) are operation views showing a cross section of a main part of the cylinder lock of the present invention, FIG. 2 is a side view in which a key is inserted and a part of the cylinder lock is cut away, and FIG. Is a plan view of the key, and FIGS. 4 (a), (b), and (c) are operation state diagrams for cross-sectioning a main part of the cylinder lock. 1 ... Case, 2 ... Rotor, 3 ... Driver pin hole, 5 ...
Driver pin, 7 ... code pin, 8 ... code pin hole,
9 ... keyhole, K ... key, K ₁ ... new code key, S ... cylinder lock, l ... shear line.

Claims (2)

[Claims] 1. A driver pin and a spring for urging the driver pin in a direction projecting from the inner peripheral surface of the case are inserted into a driver pin hole provided in a cylindrical case,
In the rotor rotatably fitted in the case, a key hole having an opening edge on the outer peripheral surface of the rotor and a code pin hole which intersects the key hole at a substantially right angle and faces the driver pin hole when locked are provided. A cylinder lock provided by inserting a code pin into the code pin hole, and inserting a code changing member having a diameter smaller than the diameter of the driver pin between the code pin and the driver pin; A key that forms a shear line between the code changing member and the driver pin when inserted into the key hole, and pushes the end surface of the code pin to the shear line when inserted into the key hole. A new cord which is formed in a shape and has a notch hole having a diameter smaller than the diameter of the driver pin and having a depth into which the cord changing member can be inserted, at the end portion on the opening edge side. Combination device code changeable cylinder lock and key, characterized in that a chromatography. 2. The cylinder lock and key combination device according to claim 1, wherein the driver pin has a flat end surface in the biasing direction.