JP2005307609A - Pin tumbler lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin tumbler lock which has a relatively simple structure and can prevent fraudulent unlocking. <P>SOLUTION: This pin tumbler lock is equipped with an outer cylinder 3 which is radially provided with a plurality of pin holes, an inner cylinder 2 which is turnably inserted into the outer cylinder 3, a plurality of pin tumblers 4 which are inserted into tumbler inserting holes of the inner cylinder, a plurality of drive pins 5 which are inserted into the pin holes of the outer cylinder, and a key 10 which is inserted into a key inserting hole and which has a key code hole 12 engaged with the tip of a pin tumbler. The key inserting hole 21 of the inner cylinder 2 is formed as a circular hole with a circular cross section; a part of an inner wall of the key inserting hole of the inner cylinder is provided with a hemispheric protrusion 25; an insertion part 11 of the key 10 is cylindrically formed; and a fitting groove 13, into which the protrusion 25 is fitted when the insertion part of the key is inserted into the key inserting hole 21, is formed in the axial direction of the outer periphery of the cylindrical insertion part of the key. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pin tumbler lock using a pin tumbler, and more particularly to a pin tumbler lock having a relatively simple structure and capable of effectively preventing unauthorized unlocking.

Generally, a pin tumbler lock has a plurality of pin tumblers accommodated in an inner cylinder so as to be movable in the transverse direction of the shaft together with a coil spring and a drive pin, and an outer cylinder is fitted on the outer side of the inner cylinder. By inserting the pin tumbler toward the outer tube side by inserting the pin tumbler, the drive pin and the pin tumbler are aligned with the shear line to unlock. Moreover, in recent pin tumbler locks, in order to prevent unauthorized unlocking by an unauthorized key, multiple rows of pin tumblers are arranged in a plurality of transverse directions, and key code holes are formed in a plurality of abdominal surfaces of the keys. A lock having a structure in which the tip of each pin tumbler is inserted into the key code hole and unlocked has been proposed in Patent Document 1 below.
JP 2002-180710 A

  However, this type of pin tumbler lock can prevent unauthorized unlocking due to picking etc. by arranging a number of pin tumblers in multiple directions, but it is used by inserting the same plate-like key as before Therefore, there is a problem that unauthorized unlocking is easily performed by inserting an unauthorized unlocking tool or the like. In addition, this type of conventional pin tumbler tablet has a plurality of rows of pin tumblers arranged at various angles, which complicates the structure, increases the number of parts, and increases manufacturing costs. was there.

  The present invention has been made in view of the above points, and an object thereof is to provide a pin tumbler lock having a relatively simple structure and capable of preventing unauthorized unlocking.

  In order to achieve the above object, a pin tumbler lock of the present invention includes an outer cylinder having a plurality of pin holes in the radial direction, a rotary insertion into the outer cylinder, and a plurality of key insertion holes provided inside. An inner cylinder provided with a plurality of tumbler insertion holes in the radial direction, a plurality of pin tumblers inserted into the tumbler insertion hole of the inner cylinder, and a pin hole of the outer cylinder. A plurality of drive pins, a coil spring that is inserted into the pin hole and biases the drive pin inward, and a key having a key code hole that is inserted into the key insertion hole and engages the tip of the pin tumbler And a pin tumbler lock provided with a key insertion hole of the inner cylinder is formed as a circular hole having a circular cross section, and a convex portion is provided on a part of the inner wall of the key insertion hole of the inner cylinder, The key insertion part is formed in a cylindrical shape. When inserting the insertion portion of the key into the key insertion hole, the fitting groove convex part is fitted, characterized in that formed on the outer periphery direction of the cylindrical insertion portion of the key.

  Here, as in claim 2, a plurality of key code holes are arranged along the axial direction at positions corresponding to 0 degrees and positions corresponding to 180 degrees on the outer periphery of the key insertion portion, and the convex portions are key insertion holes. The fitting grooves can be formed on both sides of the plurality of key code holes in the axial direction.

  According to a third aspect of the present invention, a protrusion is formed at the base of the key insertion portion, and the protrusion is fitted at a position corresponding to 0 degrees and a position corresponding to 180 degrees near the opening of the key insertion hole of the inner cylinder. An openable groove can be formed.

  The pin tumbler lock with the above configuration has a structure in which the key insertion part is formed in a columnar shape and is unlocked by inserting the key insertion part into the circular key insertion hole. The part can be reduced in size, and the inner diameter of the key insertion hole can also be reduced. Therefore, the circular key insertion hole has a smaller inner diameter (width) than conventional plate-like keys, making it difficult to insert a picking tool for unauthorized unlocking and effectively preventing unauthorized unlocking. Can do. For this reason, it is not necessary to increase the number and arrangement of pin tumblers in the lock body, simplifying the structure of the lock and reducing the number of parts.

  According to a second aspect of the present invention, the key code holes formed on the outer periphery of the key insertion portion are arranged along the axial direction at positions corresponding to 0 ° and 180 ° on the outer periphery of the insertion portion, and The protrusions are formed on both sides of the inner wall of the key insertion hole, and the fitting grooves are formed on both sides in the axial direction crossing the plurality of key code holes, so that the key can be used as a reversible key. Is operated at an angular position that is inverted 180 degrees from the appropriate unlocked position (angle), that is, the locking / unlocking operation can be performed at two inverted angular positions.

  According to a third aspect of the present invention, a protrusion is formed at the base of the key insertion portion, and the protrusion is located at a position corresponding to 0 degrees and a position corresponding to 180 degrees in the vicinity of the opening of the key insertion hole of the inner cylinder. If the fitting opening groove is formed, the turning force when the key is turned can be transmitted to the inner cylinder satisfactorily and the lock shaft can be turned.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 shows a front view of the pin tumbler lock, FIG. 3 shows a perspective view thereof, and FIG. 4 shows a sectional view thereof. In the pin tumbler lock of this embodiment, a long cylinder 18 is connected and fixed to a base portion of a normal cylinder lock type pin tumbler lock 1, and a lock shaft 19 is disposed at an axial center in the cylinder 18. The lock shaft 19 is passed through the fixed support portion 17 fixed in the base portion of the cylinder 18 to form a long cylinder lock.

  The pin tumbler lock 1 fixed to the tip of the long cylinder 18 includes an outer cylinder 3 having a plurality of pin holes 31 in the radial direction, as shown in the cross-sectional views of FIGS. An inner cylinder 2 that is rotatably inserted into the cylinder 3, has a key insertion hole 21 on the inside, and has a plurality of tumbler insertion holes 22 for inserting a plurality of pin tumblers 4 in the radial direction; A plurality of pin tumblers 4 inserted into the tumbler insertion holes 22, a plurality of drive pins 5 inserted into the pin holes 31 of the outer cylinder 3, and a coil inserted into the pin holes 31 and biasing the drive pins 5 inward And a spring 6.

  As shown in FIGS. 6 to 8, the inner cylinder 2 is basically formed in a cylindrical shape having a bottomed structure with the bottom closed, and a flange portion is formed at the tip of the opened inner cylinder 2. The cylindrical portion below the flange portion of the inner cylinder 2 is formed with an outer diameter dimension that can be rotatably inserted into the outer cylinder 3. Further, a lock shaft fitting portion 24 is provided on the outer side of the bottom portion of the inner cylinder 2 so as to be fitted to the tip of the lock shaft 19. Further, a total of six tumbler insertion holes 22 are formed in the side wall portion of the inner cylinder 2.

  The six tumbler insertion holes 22 are located on both sides of the inner cylinder 2 as shown in FIG. 7, that is, at a position corresponding to 0 degrees (12 o'clock) and 180 degrees (6 o'clock) in the front view of the inner cylinder 2 shown in FIG. Three of each are arranged in parallel at a predetermined interval in the axial direction. Further, as shown in FIG. 7, the tumbler insertion holes 22 on both the left and right sides are arranged at positions shifted by a half pitch on the left and right, and the pin tumbler 4 is inserted into the insertion holes 22 from the outside to the inside. The shape of the insertion hole 22 is formed so that the inner diameter of the insertion hole 22 is narrowed so as to stop at the position. Here, the position corresponding to 0 degrees (12 o'clock) and the position corresponding to 180 degrees (6 o'clock) are vertical with the opening groove 23 on the front of the lock as the vertical direction, as shown in the front view of FIG. When the lock is positioned on the line, the direction of the upper opening groove 23 described later is a position corresponding to 0 degrees, and the direction of the lower opening groove 23 is a position corresponding to 180 degrees.

  On the inner wall of the key insertion hole 21, an opening groove 23 that opens to the front side at a position corresponding to 0 degree (12 o'clock) and a position corresponding to 180 degrees (6 o'clock) in the front view of the inner cylinder 2 extends along the longitudinal direction. Is formed. Furthermore, in the vicinity of the opening in the key insertion hole 21, a hemispherical convex portion 25 is provided to project inward as shown in FIGS. On the other hand, the length of the six pin tumblers 4 inserted into the insertion holes 22 is set to be long or short according to the depth of the key code hole 12 of the key 10. Furthermore, a circumferential groove 26 for the retainer 8 for fixing the inner cylinder 2 in the outer cylinder 3 is formed in the circumferential direction on the outer peripheral part near the bottom of the inner cylinder 2.

  As shown in FIGS. 9 to 12, the outer cylinder 3 is formed in a cylindrical shape, and has an inner diameter that allows the inner cylinder 2 to be inserted and rotated from the front end side. Positions corresponding to the tumbler insertion holes 22 of the inner cylinder 2 on both sides of the outer peripheral wall of the outer cylinder 3, that is, on the outer wall at positions corresponding to 0 degrees and 180 degrees in front view. Are installed side by side.

  Further, as shown in FIG. 10, a fixing pin hole 32 for inserting a fixing pin in order to fix the cylinder 18 is formed near the end of the outer peripheral portion of the outer cylinder 3. Further, when the inner cylinder 2 is inserted into the outer cylinder 3, a retainer 8 for fixing the inner cylinder 2 to the outer cylinder 3 is fitted to the inner peripheral groove 26 of the inner cylinder 2 and the corresponding portion of the outer cylinder 3. Therefore, a retainer groove 33 is formed at the end of the outer cylinder 3.

  Further, as shown in FIG. 11, a plate-like recess 34 is formed in the outer peripheral portion of the outer cylinder 3 along the opening edge portions of the three pin holes 31. A cover plate 7 described later is fitted so as to close the outside of the hole 31. Further, a portion near the base in the outer peripheral portion of the outer cylinder 3 is formed with a small diameter portion having a small diameter through a step portion, and the tip of the long cylinder 18 is fitted into the small diameter portion. As shown in FIG. 5, the drive pin 5 and the coil spring 6 are inserted into each pin hole 31 of the outer cylinder 3. The length of each drive pin 5 matches the key code, that is, the key of the key 10. It is set according to the depth of the cord hole 12.

  As shown in FIGS. 1 and 4, the long cylinder 18 attached to the base portion of the pin tumbler lock 1 is fitted with a fixed support portion 17 at the end thereof, and a lock shaft 19 is located at the axial center in the cylinder 18. Are arranged along the axial direction. The inner lock shaft 19 is rotatably inserted into and supported by the shaft hole of the fixed support portion 17, and a connecting portion that is fitted and connected to the lock shaft fitting portion 24 of the inner cylinder 2 at the tip of the lock shaft 19. Is formed. The fixed support portion 17 is provided with an attachment flange 16 for attachment.

  FIG. 2 shows a front view of the key 10 used for the pin tumbler lock 1. The key 10 is formed to have a columnar insertion portion 11 so that the key 10 can be inserted into the circular key insertion hole 21 of the pin tumbler lock 1, and its cross section is basically circular. A key code hole 12 having a predetermined depth is formed at a predetermined position on the outer periphery of the cylindrical insertion portion 11. These key code holes 12 are formed in a dimple shape having a concave part of a substantially spherical shape. In addition, a plurality of key code holes 12 are formed on both sides of the key insertion portion 11 so that the key 10 can be inserted and unlocked even when it is inverted 180 degrees, that is, the key can be used reversibly. The same size and the same arrangement form.

  Further, on both sides of the key insertion portion 11, fitting grooves 13 are formed along the longitudinal direction, and these fitting grooves 13 are formed along the arrangement direction (axial direction) of the plurality of key code holes 12 and on the key. It is formed so as to overlap with the code hole. The fitting grooves 13 formed on both sides of the key insertion portion 11 project into the inner opening when the key 10 is inserted into the key insertion hole 21 at a position corresponding to 0 degrees or a position corresponding to 180 degrees in a front view. Thus, the hemispherical convex portion 25 is fitted to allow the insertion of the key 10 and to prevent the unauthorized key without the fitting groove 13 from being inserted.

  Further, a protrusion 14 is formed at a base portion of the key insertion portion 11 at a position corresponding to 0 degrees and a position corresponding to 180 degrees in a front view. When the key 10 is inserted to an appropriate position in the key insertion hole 21, the protrusion 14 is fitted in the opening groove 23 at the tip in the key insertion hole 21 so that the rotational force of the key 10 can be transmitted to the inner cylinder 2 satisfactorily.

  When the pin tumbler lock configured as described above is assembled at the time of manufacture or the like, first, the inner cylinder 2 is inserted into the outer cylinder 3 from the front side, and the retainer 8 is inserted into the retainer groove 33 and the circumferential groove 25. The inner cylinder 2 is fitted into the outer cylinder 3 so as to be rotatable. Thereby, the inner cylinder 2 is attached to the outer cylinder 3 so as to be rotatable in any direction of 360 degrees. Then, with the tumbler insertion hole 22 of the inner cylinder 2 and the pin hole 31 of the outer cylinder 3 communicating with each other, the pin tumbler 4, the drive pin 5, and the coil spring 6 are pinned inside the tumbler insertion hole 22 and the pin hole 31. Inserting from the hole 31 side, the cover plate 7 is fitted into the plate-like recess 34 of the outer cylinder 3, and the pin hole 31 is closed.

  Then, as shown in FIG. 4, a long cylinder 18 is fitted to the base of the outer cylinder 3 of the pin tumbler lock 1 assembled as described above. The cylinder 18 is fitted into the small diameter portion of the base portion of the outer cylinder 3, and the front end of the lock shaft 19 inside is fitted to the lock shaft fitting portion 24 at the end of the inner cylinder 2. A fixing pin is press-fitted into the fixing pin hole 32 from the outside of the fitting portion, and the cylinder 18 is fixed to the outer peripheral portion of the outer cylinder 3. Thus, the inner cylinder 2 serving as the rotor of the pin tumbler lock 1 is connected to the lock shaft 19 in the cylinder 18, and the lock shaft 19 can be rotated by the rotation of the inner cylinder 2 of the pin tumbler lock 1.

  Such a lock device connected to the long cylinder 18 and the lock shaft 19 and attached with the pin tumbler lock 1 is used, for example, as a lock device for a door of a game machine such as a slot machine. A cam (not shown) is fixed to the tip, and the cam is linked to another member of the locking device so as to rotate and unlock.

  When the key 10 is inserted into the key insertion hole 21 of the pin tumbler lock 1 at the time of unlocking, the protrusion 14 located at the base part of the key insertion part 11 of the key 10 is equivalent to 0 degree in front view of the key insertion hole 21. The key insertion portion 11 is inserted into the key insertion hole 21 according to the opening groove 23 located at a position or a position corresponding to 180 degrees.

  At this time, the hemispherical convex portions 25 on both sides in the key insertion hole 21 are fitted into the fitting grooves 13 provided on both sides of the key insertion portion 11 so that the insertion portion 11 of the key 10 reaches the proper position. 21 is inserted. When the insertion portion 11 of the key 10 is inserted into an appropriate position, the key code holes 12 provided on both sides thereof come into contact with the tip of the tumbler 4, and the pin tumbler 4 moves through the tumbler insertion hole 22 of the inner cylinder 2. . As a result, the boundaries between all the pin tumblers 4 and the drive pins 5 coincide with the shear lines, that is, the outer peripheral surface of the inner cylinder 2 and the inner peripheral surface of the outer cylinder 3, and the unlocked state as shown in FIG. The cylinder 2 can be unlocked or locked by turning in any direction.

  In this state, when the key 10 is turned and the inner cylinder 2 is rotated, the lock shaft 19 connected to the inner cylinder 2 is rotated, and unlocking or locking operation is performed. Since the pin tumbler 4 is separated from the drive pin 5 in a state where the inner cylinder 2 is rotated from a predetermined angular position in the unlocked state, the pin tumbler 4 cannot move within the tumbler insertion hole 22. The state in which the tip is fitted in the key code hole 12 of the key 10 is maintained. In this state, the key 10 cannot be pulled out from the inner cylinder 2.

  Therefore, as in the case of the conventional key, when the key 10 is pulled out, the key 10 is pulled out in a state where the key 10 is turned to an appropriate unlocking position (a position where the angle positions of the pin tumbler 4 and the drive pin 5 are in contact with each other). It will be. The pullable position of the key 10 is a position where the tumbler insertion hole 22 of the pin tumbler 4 and the pin hole 31 of the drive pin 5 communicate with each other and the pin tumbler 4 or the drive pin 5 moves as described above. The touch is transmitted from the key 10 to the user's hand, and the angular position at which the key 10 is pulled out can be easily recognized.

  Since the insertion portion 11 of the key 10 is cylindrical, the insertion portion 11 of the key 10 can be inserted up to the entrance of the key insertion hole 21 at any angle, but the hemispherical convex portion 25 is inserted into the insertion hole 21. Since there is a need to fit the fitting groove 13 of the key insertion portion 11 here, the key insertion portion 11 cannot be inserted to an appropriate position, and unauthorized key insertion can be prevented. it can.

  In the case of the key 10 shown in FIG. 2, the key code holes 12 formed on the outer periphery of the key insertion portion 11 are axially located on both sides of the insertion portion 11, that is, at positions corresponding to 0 ° and 180 ° on the outer periphery. Since the keys are reversibly arranged, the keys can be operated as reversible, and the keys can be locked and unlocked by inserting them into the insertion holes 21 even at an angle position reversed 180 degrees from the appropriate unlock position (angle). be able to.

  On the other hand, the insertion portion 11 of the key 10 is formed in a cylindrical shape and is formed of a round bar metal or the like, but the columnar insertion portion 11 has a width (diameter) compared to the plate-like insertion portion of the conventional plate-like key. The key 10 can be made smaller than the plate-like key because the required strength can be ensured even when the key is made smaller. As a result, the inner diameter of the key insertion hole 21 of the lock can be made smaller than that of the conventional plate-like key, which makes it difficult to insert unauthorized tools or the like into the key insertion hole 21. Unauthorized unlocking can be prevented.

  Of course, when a key having an improper key code hole is inserted into the insertion hole 21, even if the insertion portion of the key can be inserted into the insertion hole 21, all pin tumblers 4 and drives When the pin 5 does not move to an appropriate position (when the shear line does not match), the inner cylinder 2 does not rotate and unlocking becomes impossible.

  Further, when the appropriate key 10 is inserted into the key insertion hole 21 at an appropriate angle, the protrusion 14 of the base part of the key insertion part 11 corresponds to a position corresponding to 0 degree and 180 degrees near the opening part of the insertion hole 21. Since it fits in the opening groove 23 provided at the position, the turning force of the key 10 can be properly transmitted to the inner cylinder 2, and the inner cylinder 2 and the lock shaft 19 can be properly rotated by the appropriate key 10. Unlocking operation can be performed.

  As described above, according to the pin tumbler lock of the present invention, the key insertion portion is formed in a columnar shape, and the unlocking operation is performed by inserting the key insertion portion into the circular key insertion hole. The key can be reduced in size as compared with the conventional plate key, and the inner diameter of the key insertion hole can be reduced, thereby preventing unauthorized unlocking. Further, since the circular key insertion hole has a smaller inner diameter than that of the conventional plate-like key, it is difficult to insert a picking tool for unauthorized unlocking, and unauthorized unlocking can be effectively prevented. For this reason, it is not necessary to increase the number and arrangement of pin tumblers in the lock body, simplifying the structure of the lock and reducing the number of parts.

It is a front view of the pin tumbler lock which shows one Embodiment of this invention. (A) is the front view of a key, (b) is the left side view, (c) is the top view. It is a perspective view of a pin tumbler lock. It is sectional drawing along the axial direction of the pin tumbler lock. 1 is a cross-sectional view of a pin tumbler lock 1. FIG. 2 is a front view of an inner cylinder 2. FIG. 3 is a central sectional view of the inner cylinder 2. FIG. 3 is a right side view of the inner cylinder 2. FIG. 3 is a front view of the outer cylinder 3. FIG. FIG. 10 is a central cross-sectional view (cross-sectional view taken along line XX in FIG. 9) of the outer cylinder 3. 3 is a right side view of the outer cylinder 3. FIG. It is the XII-XII sectional view taken on the line of FIG. It is sectional drawing at the time of unlocking which inserted the key 10 in the pin tumbler lock.

Explanation of symbols

1-pin tumbler lock 2-inner cylinder 3-outer cylinder 4-pin tumbler 5-drive pin 6-coil spring 10-key 11-insertion part 12-key cord hole 13-fitting groove 14-projection part 21-key insertion Hole 22-Tumbler insertion hole 23-Opening groove 25-Hemispherical convex part

Claims (3)

An outer cylinder having a plurality of pin holes in the radial direction, and a plurality of tumbler insertion holes for inserting a plurality of pin tumblers are provided in the radial direction. An inner cylinder provided in the inner cylinder, a plurality of pin tumblers inserted into the tumbler insertion hole of the inner cylinder, a plurality of drive pins inserted into the pin holes of the outer cylinder, and the drive pins inserted into the pin holes In a pin tumbler lock comprising: a coil spring that urges the pin tumbler inwardly; and a key that is inserted into the key insertion hole and has a key code hole that engages with the tip of the pin tumbler.
The key insertion hole of the inner cylinder is formed by a circular hole having a circular cross section, a convex portion is provided on a part of the inner wall of the key insertion hole of the inner cylinder, and the key insertion part is formed in a cylindrical shape. A pin tumbler lock characterized in that when the key insertion portion is inserted into the key insertion hole, a fitting groove into which the convex portion is fitted is formed in the outer peripheral axis direction of the columnar insertion portion of the key. .   A plurality of key code holes are arranged along the axial direction at positions corresponding to 0 ° and 180 ° on the outer periphery of the key insertion portion, and the convex portions are formed on both sides of the inner wall of the key insertion hole. The pin tumbler lock according to claim 1, wherein the groove is formed on both sides of the plurality of key code holes in the axial direction. A protrusion is provided at the base of the key insertion portion, and an opening groove in which the protrusion can be fitted is formed at a position corresponding to 0 degrees and a position corresponding to 180 degrees in the vicinity of the opening of the key insertion hole of the inner cylinder. The pin tumbler tablet according to claim 1.

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