JPH0716867U - Cylinder lock - Google Patents

Abstract

(57) [Summary] [Purpose] By providing the key code pattern of the key to be used on both sides of the key blade, it is possible to prevent the fingertips from being damaged, and the key code pattern is used for the length of the key blade. 180 with respect to the central axis of the direction
(EN) Provided is a cylinder lock that can be used without worrying about the insertion direction of a key into a plug by providing rotationally symmetrical degrees. A key code pattern, which is searched by a tumbler in a plug and is aligned with a predetermined position of all the tumblers, is formed on side walls of a pair of grooves formed in a longitudinal direction of central portions of both side surfaces of the key blade. The structure of a cylinder lock that uses a key that is formed 180 degrees rotationally symmetrical with respect to the central axis of the longitudinal direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a so-called reversible cylinder lock that does not expose a key ridge on the edge of the key blade and can be operated even when the key 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 provided with a control member for retracting into the plug by the rotational force of the plug to disengage the engagement between the plug and the cylinder body is disclosed in Japanese Patent Publication No. 63-500394, "Key and Manufacture of Key". Method ”.

The cylinder lock described in the above publication has a large number of key differences, and is intended to prevent imitation, and there is no problem in the configuration for achieving the purpose, but it is used. A key ridge, which is a key code pattern, is engraved on one side edge of the key blade of the key to be used, and the key ridge portion is like a blade so that the part to be inserted into the key hole is called a key blade. Therefore, there is a problem that the fingertips may be injured when gripped tightly, clothes and other things may be damaged when carrying, and the direction of inserting 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 of a key to be used on both sides of a key blade so as to prevent fingertips, clothes, etc. from being damaged, and its key code pattern. The object of the present invention is to provide a cylinder lock which can be used without worrying about the insertion direction of the key into the plug by arranging the keys in a rotationally symmetrical manner with respect to the central axis in the longitudinal direction of the key blade by 180 degrees. It is a thing.

[0005]

[Disclosure of device]

 The cylinder lock according to the present invention comprises a cylinder body and a plug rotatably fitted in the cylinder body. The cylinder lock is located at a predetermined position by searching for the key code pattern of the inserted key. A plurality of tumblers biased by aligned springs and a notch formed on each tumbler that is biased to project from the outer circumference of the plug and engages a part of the cylinder body to prevent rotation of the plug. A cylinder lock equipped with a control member that retracts into the plug by the rotational force of the plug when the parts are aligned, and releases the engagement between the plug and the cylinder body. Key code pattern is formed on the side walls of a pair of grooves formed in the central portion of both side surfaces of the key blade in the longitudinal direction in a rotationally symmetric manner with respect to the central axis in the longitudinal direction of the key blade. And it is characterized in that they are.

[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】

 Fig. 1 is a vertical sectional front view of the cylinder lock of the present invention before the key is inserted, Fig. 2 is a longitudinal sectional front view of the cylinder lock inserted and slightly rotated, and Fig. 3 is a key used for the cylinder lock of the present invention. 4 is a cross-sectional plan view of only the cylinder barrel along the line AA in FIG. 1, 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 is a cylinder body, 2 is a plug rotatably fitted in the cylinder body, and a plurality of tumblers 3 ... 3 for searching a key code pattern of a key described later in parallel with the keyhole 21 are springs. It is inserted through 4 so as to be vertically movable. Each tumbler 3 has a vertical portion 31 which is biased by the spring 4 and a horizontal portion 32 which is perpendicular to the vertical portion 31 and extends in the keyhole direction. A cutout portion 33 is formed in a portion of the vertical piece 31 opposite to the keyhole. Reference numeral 5 is a taper formed in the groove 22 formed in the longitudinal direction so as to be orthogonal to the keyhole 21 of the plug 2 and formed in the longitudinal direction of the inner peripheral surface of the plug insertion hole of the cylinder body 1. A flat plate that can be fitted into the notch when the taper engaging part 51 that fits into the groove 11 having a wall surface and the notches 33 ... 33 of all the tumblers 3 ... 3 are aligned in a straight line. A long control member that restricts the rotation of the plug having a ring-shaped fitting portion 52, and is normally urged by a spring (not shown) so that the engaging portion 51 projects from the outer peripheral surface of the plug.

Reference numeral 6 denotes a key used in the cylinder lock of the present invention, which has a pair of grooves 62, 62 formed in the central portion of both side surfaces of a key blade 61 inserted into the plug 2 in the longitudinal direction. The side wall of the groove is searched by the tumblers 3 ... 3 and a key code pattern matching all the tumblers at a predetermined position is engraved in a 180-degree rotational symmetry with respect to the central axis of the key blade 61 in the longitudinal direction. There is. Here, the key code pattern has the same shape as the key crests engraved on the edge of the conventional key on the side of the key blade. When the key 6 is inserted into the plug 2, a plurality of valleys of this key code pattern are formed. When the lower ends of the horizontal portions 32 ... 32 of the tumblers 3 ... 3 come into contact with the portions, the cutout portions 33 ... 33 of all the tumblers are aligned in a straight line at a position corresponding to the fitting portion 52 of the control member 5. The key is referred to as the matching key of this cylinder lock. Therefore, by combining a plurality of the tumblers 3 formed by changing the positions of the notches 33, a large number of key differences can be obtained as in a normal pin tumbler lock.

In the state of FIG. 1 in which the key 6 is not inserted, each tumbler 3 is urged by the spring 4 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 2, the control member 5 is in a fixed state in which it cannot move in the center direction of the plug due to the vertical portion 31 of each tumbler. The plug 2 cannot be rotated because it is fitted in the groove 11 of the cylinder body 1.

When the compatible key 6 is inserted into the plug 2 through the keyhole 21, the lower end of the horizontal portion 32 of each tumbler 3 is pushed to the peaks and valleys of the key code pattern formed on the side surface of the key blade. And moves up and down, and the cutout portions 33 ... 33 of all the tumblers are aligned at the position corresponding to the fitting portion 52 of the control member 5 at the final insertion position. When the key 6 is rotated in this state, the side wall of the recessed groove 11 of the cylinder body 1 into which the tapered engagement portion 51 of the control member 5 is fitted is tapered, so that the engagement portion is recessed. A force that pushes out from the groove 11 acts and tries to move the control member 5 toward the center of the plug 2. The cutouts 33 ... 33 of the tumbler are aligned at the positions corresponding to the fitting portions 52, and the fitting portions 52 can be fitted into the notches, so that the control member 5 retracts into the plug 2 and the plug 2 2 becomes rotatable as shown in FIG. When the plug 2 is rotated 360 degrees to be locked or unlocked, the control member 5 comes to a position corresponding to the recessed groove 11, so that the control member 5 that is constantly urged to project from the outer peripheral surface of the plug is The engaging portion 51 moves so as to fit into the groove 11, and the fitting portion 52 separates from the cutout portion of the tumbler, so that the key can be removed from the plug 2.

In the case of a cylinder lock in which a plurality of tumblers 3 ... 3 are arranged in a line, there is one control member 5 and one recessed groove 11 to be fitted. 6 cannot be pulled out from the plug 2, but when a pair of tumbler rows are symmetrically provided so as to sandwich the keyhole 11 as shown in the embodiment diagram in order to increase the number of key differences, two concave grooves 11, 11 and two Since the control members 5 and 5 need to be provided symmetrically, and one of the control members 5 can be fitted in either of the concave grooves 11, there is an adverse effect that the key is removed at a position where the plug is rotated 180 degrees. . In order to prevent this, as shown in FIG. 4, the pins a ... A are pressed from the outer periphery of the cylinder body 1 toward the respective concave grooves 11, 11 so that the positions of the opposing pins are displaced, and the control member 5, 5, the notches b as shown in FIGS. 5 and 6 are provided so as not to interfere with the fitting into the recesses due to the pins in the recesses 11, 11 which are properly fitted. 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 5 and 5 are not fitted into the recessed grooves 11 and 11. There is no escape.

Since the key code pattern is formed on the side walls of the grooves 62, 62 on both sides of the key blade 61 of the key 6 in a rotational symmetry with respect to the central axis of the key blade in the longitudinal direction by 180 degrees, Even if the key blade is turned upside down, the key code pattern that acts on the tumbler is 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 cylinder lock of the present invention, the key code of the key to be inserted into the plug is attached to the side walls of the pair of grooves formed along the longitudinal direction of the central portions of both side surfaces of the key blade in the longitudinal direction of the key blade. Since it is formed 180 degrees rotationally symmetrical with respect to the central axis, it does not expose the key crest to the side edge of the key blade unlike the conventional key, so it may damage your fingertips, etc. It can be used reversibly without damaging clothes or other things, and it can be used reversibly without worrying about the insertion direction of the key into the plug, and the lock operation is easy. Since it has a structure that regulates the rotation of the plug, each tumbler does not apply a large shearing force, and it is not necessary to use a columnar tumbler like the conventional pin tumbler lock, and even a plate-shaped tumbler can be used. In casting, by the tumbler plate-like, it is possible to increase the number of tumblers in a constant size at the plug, in which as possible out to take a lot of number of key differences.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a cylinder lock of the present invention before a key is inserted.

FIG. 2 is a vertical sectional front view showing a state where a key is inserted and the key is slightly rotated.

FIG. 3 is a perspective view of a key used in the cylinder lock of the present invention.

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 Cylinder Body 2 Plug 3 Tumbler 4 Spring 5 Control Member 51 Engagement Part 52 Fitting Part 6 Key 61 Key Blade 62 Groove

Claims (3)

[Scope of utility model registration request] 1. A spring, which comprises a cylinder body and a plug rotatably fitted in the cylinder body, and which is aligned in a predetermined position by searching a key code pattern of a key inserted in the plug. The plurality of tumblers are urged to engage with a part of the cylinder body to prevent the plug from rotating, and the notches formed in each tumbler are aligned in a straight line. A cylinder lock provided with a control member that retracts into the plug by the rotational force of the plug when aligned and releases the engagement between the plug and the cylinder body, wherein the key code pattern of the key inserted into the plug is It is characterized in that it is formed on the side walls of a pair of grooves formed in the central portion of both side surfaces of the key blade in the longitudinal direction so as to be rotationally symmetrical by 180 degrees with respect to the central axis of the key blade in the longitudinal direction. Cylinder lock. 2. The cylinder lock according to claim 1, wherein the tumbler according to claim 1 has a columnar shape. 3. The cylinder lock according to claim 1, wherein the tumbler according to claim 1 has a plate shape.