JPH0719540U - Reversible key - Google Patents

Abstract

(57) [Abstract] [Purpose] The key code pattern is provided on both sides of the key blade so as not to damage fingertips, clothes, etc., and the key code pattern is aligned with the central axis in the longitudinal direction of the key blade. To provide a reversible key that can be used without worrying about the insertion direction into the plug by arranging it 180 degrees rotationally symmetrically. A key code pattern is rotationally symmetrical with respect to a central axis in the longitudinal direction of the key blade by 180 degrees on at least one side wall of a pair of grooves formed in the central portion of both side surfaces of the key blade in the longitudinal direction. It is characterized by being formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reversible key in which a key mountain is not exposed at the edge of the key blade side and which can be locked and unlocked even when the plug is inserted 180 degrees, that is, upside down.

[0002]

[Prior art and its problems]

 It consists of a cylinder body and a plug that is rotatably inserted in the cylinder body. Inside the plug, the key code pattern of the inserted key is searched for and the spring is urged to align it at a predetermined position. When a plurality of tumblers are biased so as to project from the outer circumference of the plug and engage with a part of the cylinder body to prevent rotation of the plug, and the notches formed in each tumbler are aligned. A cylinder lock and a key provided with a control member for retracting into the plug by the rotational force of the plug and releasing the engagement between the plug and the cylinder body are already known from Japanese Patent Publication No. 63-500394.

The cylinder lock and the key described in the above publication have a large number of key differences and are intended to prevent imitation, and there is no problem in the structure for achieving the purpose. The key ridge that is the key code pattern is engraved on one side edge of the key blade of the key used, and the key ridge portion is like a blade so that the part to be inserted into the key hole is called the key blade. Not only there is a problem that it may damage your fingertips when you hold it tightly, or you may damage clothing or other things when carrying it.In addition, the insertion direction of the key into the plug is fixed. There was a problem that it was troublesome because it had to be inserted according to.

[0004]

[The purpose of the device]

 In order to solve the above problems, the present invention provides a key code pattern on both sides of the key blade so as not to damage fingertips, clothes, etc. An object of the present invention is to provide a reversible key that can be used without worrying about the insertion direction into a plug by providing it 180 degrees rotationally symmetrically with respect to the central axis.

[0005]

[Disclosure of device]

 In the reversible key according to the present invention, a key code pattern is formed on at least one side wall of a pair of grooves formed in the central portion of both side surfaces of the key blade in a longitudinal direction with respect to a central axis in the longitudinal direction of the key blade. It is characterized by being formed rotationally symmetrically.

[0006]

[Function of the device]

 Since the key crest is not exposed at the side edge of the key blade, the key code pattern is formed 180 degrees rotationally symmetrically with respect to the central axis in the longitudinal direction of the key blade without damaging fingertips or the like. The insertion direction of the key into the plug is not restricted and is reversible.

[0007]

【Example】

 1 is a perspective view of the key of the present invention, FIG. 2 is a vertical sectional front view of the key before inserting the key into the plug, and FIG. 3 is a vertical sectional view of the key of FIG. 4 is a cross-sectional plan view of only the cylinder barrel taken along the line AA in FIG. 2, FIG. 5 is a plan view of a pair of control members, and FIG. 6 is a perspective view of the control members. Reference numeral 1 denotes the key of the present invention, which has a pair of grooves 12, 12 formed along the longitudinal direction of the central portion of both side surfaces of a key blade 11 to be inserted into a plug of a cylinder lock, which will be described later. Is searched by a tumbler in the plug described later, and two kinds of key code patterns CX and CY that match all the tumblers at a predetermined position are respectively rotated by 180 degrees with respect to the longitudinal center axis of the key blade 11. It is carved symmetrically. Here, the key code pattern has a shape similar to a key mountain engraved on the edge of the conventional key on the side of the key blade. When the key 1 is inserted into the plug 3, a plurality of key code patterns CX and CY are formed. The key when the lower end of the horizontal part of the tumbler comes into contact with the valley part of the tumbler and the notches of all the tumblers are aligned in a straight line at the position corresponding to the fitting part of the control member described later ).

Reference numeral 2 is a cylinder barrel of a cylinder lock operated by the key of the present invention, and 3 is a plug rotatably fitted in the cylinder barrel, which is parallel to the key hole 31 and is the key of the key 1 of the present invention. A plurality of tumblers 4 for searching for the code patterns CX, CY are inserted through springs 5 so as to be vertically movable. Each tumbler 4 has a vertical portion 41 that is biased by the spring 5 and a horizontal portion 42 that is perpendicular to the vertical portion 41 and extends in the keyhole direction. A cutout portion 43 is formed in a portion of the vertical piece 41 opposite to the keyhole. . 6 is inserted into a groove 32 formed in the longitudinal direction so as to be orthogonal to the key hole 31 of the plug 3, and is formed in the longitudinal direction of the inner peripheral surface of the plug insertion hole of the cylinder body 2. A flat plate that can be fitted into the notches when the tapered engaging portions 61 that fit into the groove 21 having the tapered wall surface and the notches 43 ... 43 of all the tumblers 4 ... 4 are aligned in a straight line. A long control member that restricts the rotation of the plug having a ring-shaped fitting portion 62, and is normally urged by a spring (not shown) so that the engaging portion 61 projects from the outer peripheral surface of the plug. Therefore, by combining a plurality of cutouts 43 formed in the tumbler 4 with different positions, a large number of different keys can be obtained as in a normal pin tumbler lock.

In the state of FIG. 2 in which the key 1 is not inserted, each tumbler 4 is biased by the spring 5 and is lowered to the shear line position of the cylinder body and the plug. In this state, even if a rotational force is applied to the plug 3, the control member 6 is in a fixed state in which it cannot move toward the center of the plug due to the vertical portion 41 of each tumbler. The plug 3 cannot be rotated because it is in a state of being fitted in the concave groove 21 of the cylinder body 2.

When the compatible key 1 is inserted into the plug 3 through the key hole 31, each tumbler 4 has a lower end of a horizontal portion 42 of the tumbler 4 and a mountain portion of a key code pattern C X, CY formed on a side surface of the key blade 11. 43 is pushed by the troughs to move up and down, and the cutout portions 43 ... 43 of all the tumblers are aligned at positions corresponding to the fitting portions 62 of the control member 6 at the final insertion position. When the key 1 is rotated in this state, the side wall of the concave groove 21 of the cylinder body 2 into which the tapered engagement portion 61 of the control member 6 is fitted has a tapered shape. A force that pushes out from the groove 21 acts, and tries to move the control member 6 toward the center of the plug 3. The cutouts 43 ... 43 of the tumbler are aligned at positions corresponding to the fitting portions 62, and the fitting portions 62 can be fitted into the notches, so that the control member 6 retracts into the plug 3 and the plug 3 Can rotate as shown in FIG. When the plug 3 is rotated 360 degrees to perform the locking or unlocking operation, the control member 6 comes to the position corresponding to the concave groove 21, so that the control member 6 is always urged to project from the outer peripheral surface of the plug. The engaging portion 61 moves so as to fit into the groove 21, and the fitting portion 62 separates from the cutout portion of the tumbler, so that the key can be removed from the plug 3.

In the case of a key having one type of key code pattern, the number of the control member 6 may be one, and the number of the concave groove 21 to be fitted may be one. Although it cannot be removed, if two types of key code patterns CX and CY are formed on both side walls of the groove of the key blade 11 in order to increase the number of key differences as shown in the embodiment example, a tumbler row is sandwiched between the key holes 21. Therefore, it is necessary to provide a pair symmetrically so that the two recessed grooves 21, 21 and the two control members 6, 6 need to be provided symmetrically, and one control member 6 fits into either recessed groove 21. Since they can be fitted together, there is the problem that the key will come off at the position where the plug has rotated 180 degrees. In order to prevent this, as shown in FIG. 5, the pins a ... A are pressed from the outer circumference of the cylinder body 2 toward the respective concave grooves 21, 21 so that the positions of the opposing pins are displaced, and the control member 6, The engaging portions 61, 61 of FIG. 6 are notched as shown in FIG. 5 and FIG. 6 so that the pins in the concave grooves 21 1, 21 that are normally fitted do not hinder the fitting into the concave grooves. Form b. As a result, when the plug 2 is rotated by 180 degrees, the pins a ... a and the notches b ... b do not correspond to each other, and the control members 6 and 6 are not fitted into the recessed grooves 21 and 21. There is no escape.

Key code patterns CX and CY are formed on the side walls of the grooves 12 and 12 on both sides of the key blade 11 of the key 1 so as to be rotationally symmetrical with respect to the central axis of the key blade in the longitudinal direction by 180 degrees. Therefore, even if the key blade is turned upside down, the key code patterns CX and CY that act on the corresponding tumblers are the same, and it is not necessary to check the key blade upside down when inserting the key into the keyhole.

[0013]

[Effect of device]

 According to the reversible key of the present invention, the key code pattern is formed on the sidewalls of the pair of grooves formed along the longitudinal direction of the central portions of both side surfaces of the key blade by 180 degrees with respect to the central axis of the key blade in the longitudinal direction. Since it is formed rotationally symmetrically, the key ridges are not exposed at the side edge of the key blade unlike conventional keys, so you may scratch your fingertips, wear clothing or other things when carrying. It can be used reversibly without damaging it and without worrying about the insertion direction of the key into the plug, making it easy to lock and unlock. Any type of pin tumbler lock or disc tumbler lock can be used as long as it has a tumbler that searches for the key code pattern.

[Brief description of drawings]

FIG. 1 is a perspective view of a key of the present invention.

FIG. 2 is a vertical cross-sectional front view showing a state before the key of the present invention is inserted into a plug.

FIG. 3 is a vertical sectional front view showing a state where a key is inserted and the key is slightly rotated.

4 is a cross-sectional plan view of only the cylinder barrel taken along the line AA in FIG.

FIG. 5 is a plan view of a pair of control members.

FIG. 6 is a perspective view of a control member.

[Explanation of symbols]

 1 key 11 key blade 12 groove CX key code pattern CY key code pattern 2 cylinder body 3 plug 4 tumbler 5 spring 6 control member 61 engagement part 62 fitting part

Claims (2)

[Scope of utility model registration request] 1. A key code pattern is rotationally symmetrical by 180 degrees with respect to a central axis of a key blade in a longitudinal direction on at least one side wall of a pair of grooves formed in a central portion of both side surfaces of the key blade in a longitudinal direction. A reversible key that is characterized by being formed in a uniform manner. 2. The key blade according to claim 1, wherein different key code patterns are formed on both side walls of the groove of the key blade so as to be rotationally symmetrical with respect to the central axis in the longitudinal direction of the key blade by 180 degrees. The reversible key according to claim 1.