JP2005307553A - Pin tumbler lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin tumbler lock which can reduce the abrasion and breakage of a key, a pin tumbler, etc., and which can prevent fraudulent unlocking caused by a fraudulent key. <P>SOLUTION: This pin tumbler lock is equipped with an outer cylinder 3 with a pin hole 31, an inner cylinder 2 inside which a key inserting hole 21 and a tumbler inserting hole 22 are provided, a pin tumbler 4 which is inserted into the tumbler inserting hole of the inner cylinder, a drive pin 5 which is inserted into the pin hole of the outer cylinder, a coil spring 6 which is inserted into the pin hole and which urges the drive pin inward, and the key 10 which is inserted into the key inserting hole and which has a key code hole. The key inserting hole of the inner cylinder 2 is formed of a circular hole with a circular cross section, and a bottom of the key inserting hole of the inner cylinder 2 is provided with a part 23 to be fitted, into which a leading end of the key is to be fitted when the key is inserted. When a proper key is turned in the state of being inserted into the key inserting hole of the inner cylinder, a fitting part 13 at the leading end of the key is fitted into the part 23 to be fitted in the key inserting hole, and a turning force of the key is transferred to the inner cylinder via the part to be fitted. <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 that is difficult to break and can effectively prevent 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 large number of pin tumblers in a plurality of directions, but the structure is complicated and the number of parts is very large. There is a problem that the manufacturing cost increases, and there is a problem that the pin tumbler or the drive pin is damaged if the rotor is rotated in an inappropriate state due to wear of the key code hole of the key or when the rotor is rotated by the worn key. As a result, there is a problem that problems such as inability to smoothly rotate the rotor easily occur.

  The present invention has been made in view of the above points, and provides a pin tumbler lock that can reduce wear and breakage of a key, a pin tumbler, etc., and can prevent unauthorized unlocking by an unauthorized key. With the goal.

  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 a radial direction, a rotary insertion inserted 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 when the key is inserted into the bottom of the key insertion hole of the inner cylinder, the tip of the key is A mating part to be fitted is provided. When the appropriate key is inserted into the key insertion hole of the inner cylinder and turned, the fitting portion at the tip of the key is fitted into the fitting portion in the key insertion hole, and the fitting portion is inserted through the fitting portion. The turning force of the key is transmitted to the inner cylinder.

  Here, as in claim 2, the key insertion portion is formed in a cylindrical shape having a circular cross section that can be inserted into the key insertion hole of the inner cylinder, and a position corresponding to 0 degrees on the outer periphery of the insertion portion. A plurality of key code holes having the same arrangement and the same shape can be formed along the axial direction at positions corresponding to 180 degrees.

  The pin tumbler lock configured as described above has a key insertion portion formed in a cylindrical shape, and is unlocked by inserting the key insertion portion into a circular key insertion hole. Therefore, a plurality of key code holes are formed on the outer peripheral surface of the key insertion portion, and the tip portion of the pin tumbler protrudes into the key insertion hole of the inner cylinder, but the outer peripheral surface of the insertion portion is basically a circle. Since it is formed of a circumferential curved surface, the key can be inserted into the key insertion hole at any angle. Then, when the key inserted into the key insertion hole is idled to a predetermined angular position and inserted to an appropriate position, the fitting portion at the tip of the key insertion portion is fitted to the fitted portion at the bottom of the inner cylinder, and all The pin tumbler engages with the key code hole of the key, the boundary between the pin tumbler and the drive pin is aligned with the shear line, the unlocked state, and the inner cylinder is rotatable with the key.

  In addition, since the key inserted into the key insertion hole of this lock is cylindrical, the pin tumbler does not align with the shear line regardless of whether it is an appropriate key or an incorrect key with an incorrect key code hole. In the locked state, it freely rotates freely in the key insertion hole. Therefore, even if an unauthorized key with an unauthorized key code is inserted and unlocked, the unauthorized key will only rotate freely in the key insertion hole, so excessive turning force will cause The inner cylinder, pin tumbler, key, etc. can be prevented from being damaged or worn. Also, since the key can be inserted into the key insertion hole from any angle position, the user can insert the key into the key insertion hole and easily unlock it without worrying about the angle of insertion. .

  Furthermore, as in claim 2, the key code holes formed on the outer periphery of the key insertion portion have the same shape and the same arrangement of the holes on both sides at the 0 ° equivalent position and the 180 ° equivalent position on the outer periphery of the insertion portion. By forming the key, the key can be used as a reversible. Even when the key is operated 180 degrees from the appropriate unlocked position (angle), the lock / unlock operation can be performed at two inverted angle positions. It can be carried out.

  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 this pin tumbler lock, 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 a fixed support portion 17 fixed in the base portion of the base plate, so that a long cylinder lock is formed.

  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. Further, a fitted portion 23 projects inwardly from the closed bottom portion, and the fitting portion 13 provided at the tip of the key 10 can be fitted into the fitted portion 23. 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.

  As shown in FIG. 7, the six tumbler insertion holes 22 are respectively located on both sides of the inner cylinder 2, that is, 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. Three each are arranged in parallel in the axial direction at a predetermined interval. 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. The lengths of the six pin tumblers 4 are set according to the depth of the key code hole 12 of the key 10. Further, a circumferential groove 25 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, the retainer 8 for fixing the inner cylinder 2 to the outer cylinder 3 is fitted into the inner circumferential groove 25 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. The key code holes 12 are formed as dimple holes, and are formed in a shape in which a part of a substantially spherical shape is concave, that is, a shape having a shallow concave spherical surface.

  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 an appropriate key 10 is inserted into the key insertion hole 21 of the pin tumbler lock 1, the fitting portion 13 at the tip of the key 10 is fitted into the fitting portion 23 at the bottom of the inner cylinder 2, and the insertion portion 11 of the key 10 is inserted. The key code hole 12 hits the tip of the corresponding pin 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.

  As described above, when the key 10 is inserted into the key insertion hole 21, if it is a conventional key, it has been necessary to align the tip insertion portion of the key at a predetermined angular position and insert it into the key insertion hole. Since the insertion portion 11 of 10 has a cylindrical shape with a circular cross section and the key insertion hole 22 of the inner cylinder 2 is also circular, the key 10 is inserted into the key insertion hole 21 of the lock 1 at any angular position. be able to.

  In the key 10 inserted into the key insertion hole 21, the tip of the pin tumbler 4 protruding into the key insertion hole 21 abuts on the insertion part 11 or the key code hole 12 of the key 10. Since the cord hole 12 provided in the outer peripheral surface of the cylinder is formed in a shallow concave shape, the key 10 can be freely rotated by removing the tip end of the pin tumbler 4 from the cord hole 12 in the circumferential direction. .

  Therefore, when the key 10 is inserted into the key insertion hole 21 from an arbitrary angle position and operated to push the key 10 into the insertion hole 21 while turning to the right, for example, when the key 10 reaches a predetermined appropriate angle position, The fitting portion 13 at the distal end and the fitted portion 23 in the inner cylinder 2 (insertion hole 21) are correctly fitted, and the distal end of all the pin tumblers 4 at that position has the proper key code hole 12 of the key 10. Abut. Thereby, the shear lines between all the pin tumblers 4 and the drive pins 5 coincide with each other, and the unlocked state is established.

  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. Such a position where the key 10 can be pulled out is a position where the 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. Also, when the key 10 is first inserted into the insertion hole 21 at a random angle, if the key 10 is inserted and turned to an appropriate position, the pin tumbler is aligned at an angle where the key code hole 12 coincides with the tip of the pin tumbler 4. Since 4 moves, the user can easily recognize the unlocked angular position after insertion at such a random angular position.

  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 21 are on both sides of the insertion portion 21, that is, on the outer periphery at positions corresponding to 0 ° and 180 ° The holes are formed in the same shape with the same arrangement. Therefore, the key can be operated as reversible, and the locking / unlocking operation can be performed even when the key is operated at an angle position reversed 180 degrees from the proper unlocking position (angle).

  On the other hand, when a key having an inappropriate key code hole is inserted into the insertion hole 21, a fitting portion is temporarily formed at the tip of the key, and the fitting portion is a fitting portion on the inner cylinder 2 side. 23, even if all the pin tumblers 4 and the drive pins 5 do not move to the proper positions (when the shear lines do not match), the inner cylinder 2 does not rotate and unlocking is possible. It becomes impossible.

  Further, even if all the pin tumblers 4 and the drive pins 5 can be moved to appropriate positions, if the end of the key is not fitted into the fitted portion 23 in the inner cylinder 2, the key is locked by the key. Since the shaft 19 cannot be rotated, unlocking is impossible. In other words, the pin tumbler lock 1 can be used to push the key 10 to the proper position and insert the tip of the key 10 even when the proper key 10 is inserted or when the incorrect key is inserted. In a state where the key 10 is not fitted into the fitted portion 23 in the inner cylinder 2, the key 10 is idled in the inner cylinder 2 and the unlocking operation cannot be performed.

  Therefore, since both the key code hole fitting of the key 10 and the fitting of the fitting part at the key tip are satisfied, the unlocking is effectively prevented. Can do. Furthermore, even if the unlocking operation is forcibly performed by using an inappropriate key or the like, the key only rotates idly, so that the pin tumbler 4 and the drive pin 5 can be prevented from being damaged or worn. Further, as described above, since the key 10 having the columnar insertion portion 11 is used by being inserted into the circular key insertion hole 21, the key is inserted into the key hole in accordance with a predetermined angular position like a conventional key. There is no need to insert it, and the key 10 can be easily inserted into the insertion hole 21 at a random angle and then unlocked, thereby creating an unprecedented convenience.

  As described above, according to the pin tumbler lock of the present invention, the key insertion portion to be inserted into the key insertion hole has a cylindrical shape and is used by being inserted into the circular key insertion hole. Regardless of the improper key with an incorrect key code hole, in the unlocked state where the pin tumbler does not align with the shear line, the key tumbles freely inside the key insertion hole. Even if the key is unlocked and the unlocking operation is performed, the unauthorized key only rotates idly in the key insertion hole, and no excessive turning force is applied to the pin tumbler, drive pin, or inner cylinder. It is possible to prevent the tube, pin tumbler, key, etc. from being damaged or worn. Furthermore, the unlocked state is only when the fitting part at the tip of the key and the fitted part in the inner cylinder of the lock are correctly fitted and all the pin tumblers are in contact with the key code holes of the appropriate key. Therefore, unauthorized unlocking can be prevented with a higher probability.

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 part 21-key insertion hole 22-tumbler Insertion hole 23-mated part

Claims (2)

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 as a circular hole having a circular cross section, and a fitted portion is provided to which the tip of the key is fitted when the key is inserted into the bottom of the key insertion hole of the inner cylinder. When the appropriate key is inserted into the key insertion hole of the inner cylinder and turned, the fitting portion at the tip of the key is fitted into the fitting portion in the key insertion hole, and the fitting portion is inserted through the fitting portion. A pin tumbler lock characterized in that the rotational force of the key is transmitted to the inner cylinder.   The key insertion part is formed in a cylindrical shape having a circular cross section that can be inserted into the key insertion hole of the inner cylinder, and a plurality of key codes are provided at positions corresponding to 0 degrees and 180 degrees on the outer periphery of the insertion part. The pin tumbler tablet according to claim 1, wherein the holes are formed in the same arrangement and shape along the axial direction.

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