JP4628403B2 - Axial pin tumbler lock with defense mechanism - Google Patents

Description

The present invention relates to an axial pin tumbler lock in which a bottom pin on a fixed body side and a tumbler pin on a rotor side are arranged in an axial direction, and an operation step portion is formed in an axial direction on an outer peripheral surface of a cylindrical portion of a key.

A stator is arranged on the bottom side of the cylindrical cavity of the fixed body, a bearing hole is formed in the axial direction in the center of the stator, and a plurality of bottom pin holes are arranged on the same circumference from the front surface of the stator. Formed into a cylindrical cavity, and a locking shaft portion of the rear portion of the rotor that rotatably accommodates the rotor is fitted into the bearing hole, and a plurality of tumbler pin holes are formed in the axial direction in the magazine portion of the rotor, The tumbler pin hole and the bottom pin hole that communicate with each other accommodate a tumbler pin whose length is individually set corresponding to the key cord and a bottom pin that is forward-biased by a spring. The front end of the tumbler pin is brought into contact, an annular key hole is formed between the inner peripheral surface of the inward stepped portion and the outer peripheral surface of the front end portion of the rotor, and the annular key hole is formed on the inner peripheral surface of the inward stepped portion. Opening positioning groove It is formed in the axial direction, a passive groove is formed in the axial direction on the outer peripheral surface of the front end portion of the rotor, and the positioning projection fitted into the positioning groove and the front end of the tumbler pin are pushed on the outer peripheral surface of the cylindrical portion of the key All the tumbler pins and bottom pins corresponding to the depths individually set in the respective operation step portions are formed by forming operation step portions and providing driving projections fitted in the passive grooves on the inner peripheral surface of the tip portion of the cylindrical portion. An axial pin tumbler lock in which the contact point is moved on the shear line between the stator and the magazine is already known (see Patent Document 1 and Patent Document 2).

In such an axial pin tumbler lock, about half of the front end of the tumbler pin is exposed in the annular key hole, so that the number of tumbler pins is the same as the number of tumbler pins on the outer peripheral surface of the cylindrical body simulating the cylindrical portion of the key. A picking tool equipped with a slide member has been illegally produced, and an unlocked state is created by advancing and retracting each slide member in the axial direction while applying rotational tension to the rotor.

Japanese Utility Model Publication No. 56-38123 Japanese Utility Model Publication No. 7-21774

An object of the present invention is to provide a pin tumbler lock with a defense mechanism that is very difficult to perform a picking operation.

The main feature of the invention according to claim 1 is that a stator 3 is disposed on the bottom side of the cylindrical cavity 2 of the fixed body 1, a bearing hole 4 is formed in the axial direction in the center of the stator 3, and the stator 3 A plurality of bottom pin holes 5 are arranged on the same circumference from the front surface of the rotor and are formed in the axial direction. A rotor 6 is rotatably accommodated in the cylindrical cavity 2, and a locking shaft portion at the rear of the rotor 6 7 is inserted into the bearing hole 4, a plurality of tumbler pin holes 9 are formed in the magazine portion 8 in the middle of the rotor 6 in the axial direction, and the tumbler pin holes 9 and the bottom pin holes 5 communicate with each other. A tumbler pin 10 whose length is individually set corresponding to the key code and a bottom pin 11 which is forwardly urged by a spring 12 are accommodated, and a front end of the tumbler pin 10 is provided on the back surface of the inwardly stepped portion 13 of the fixed body 1. Abut An annular key hole 15 is formed between the inner peripheral surface of the facing step portion 13 and the outer peripheral surface of the front end portion 14 of the rotor 6, and opens in the annular key hole 15 on the inner peripheral surface of the inward step portion 13. The positioning groove 16 is formed in the axial direction, the passive groove 17 is formed in the outer peripheral surface of the front end portion 14 of the rotor 6 in the axial direction, and the positioning groove 16 is formed on the outer peripheral surface of the distal end portion of the cylindrical portion 19 of the key 18. A positioning projection 20 to be fitted and an operation step portion 21 for pushing the front end of the tumbler pin 14 are formed, and a driving projection 22 to be fitted to the passive groove 17 is provided on the inner peripheral surface of the distal end portion of the cylindrical portion 19. Axial pins adapted to move the contact points of all the tumbler pins 10 and the bottom pins 11 on the shear lines of the stator 3 and the magazine portion 8 corresponding to the depths individually set in the portions 21. Tumbler tablets Oite,
An extension portion 1 a that extends in the forward direction of the front end portion 14 of the rotor 6 is formed on the fixed body 1, and an extension portion 19 a corresponding to the extension portion 1 a of the fixed body 1 is formed on the cylindrical portion 19 of the key 18. The defense magazine 23 is rotatably arranged in the cylindrical hollow portion 2a of the extension portion 1a, and a circular key insertion hole 24 is formed in the center of the defense magazine 23 in the axial direction. The tumbler pin 10 The inwardly stepped portion 13 with which the front end of the protective magazine 23 abuts is formed in the proximal end portion of the defense magazine 23, the positioning groove 16 is formed on the inner peripheral surface of the defense magazine 23, and a plurality of drives are provided on the extension portion 1 a. A pin hole 25 is formed in the radial direction, a defense pin hole 26 is formed in the defense magazine 23 corresponding to the drive pin hole 25 in the radial direction, and a key code is formed in the drive pin hole 25 and the defense pin hole 26. In response to The accommodating a biased drive pin 28 in the centripetal direction in defense pin 27 and the spring 29 is individually set, place the tumbler pins 10 of the plurality of the positions right behind said plurality of protection pin 27 is, An annular recess 30 is formed on the outer peripheral surface of the extending portion 19 a of the key 18 so as to face the defense pin hole 26, and the positioning protrusion 20 protrudes from the end portion of the positioning groove 16 at the final insertion position of the key 18. On the other hand, the drive protrusions 22 are engaged with the passive grooves 18, and the contact points of all the defense pins 27 and the drive pins 28 are set in the defense magazine corresponding to the depths individually set in the annular recesses 30. 23 and the extension part 1a of the fixed body 1 are moved on a shear line.

The main feature of the invention according to claim 2 is that the stator 3 is disposed on the bottom side of the cylindrical cavity portion 2 of the fixed main body 1, the bearing hole 4 is formed in the axial direction in the center portion of the stator 3, and the stator 3 A plurality of bottom pin holes 5 are arranged on the same circumference from the front surface of the rotor and are formed in the axial direction. A rotor 6 is rotatably accommodated in the cylindrical cavity 2, and a locking shaft portion at the rear of the rotor 6 7 is inserted into the bearing hole 4, a plurality of tumbler pin holes 9 are formed in the magazine portion 8 in the middle of the rotor 6 in the axial direction, and the tumbler pin holes 9 and the bottom pin holes 5 communicate with each other. A tumbler pin 10 whose length is individually set corresponding to the key code and a bottom pin 11 which is forwardly urged by a spring 12 are accommodated, and a front end of the tumbler pin 10 is provided on the back surface of the inwardly stepped portion 13 of the fixed body 1. Abut An annular key hole 15 is formed between the inner peripheral surface of the facing step portion 13 and the outer peripheral surface of the front end portion 14 of the rotor 6, and opens in the annular key hole 15 on the inner peripheral surface of the inward step portion 13. The positioning groove 16 is formed in the axial direction, the passive groove 17 is formed in the outer peripheral surface of the front end portion 14 of the rotor 6 in the axial direction, and the positioning groove 16 is formed on the outer peripheral surface of the distal end portion of the cylindrical portion 19 of the key 18. A positioning projection 20 to be fitted and an operation step portion 21 for pushing the front end of the tumbler pin 14 are formed, and a driving projection 22 to be fitted to the passive groove 17 is provided on the inner peripheral surface of the distal end portion of the cylindrical portion 19. Axial pins adapted to move the contact points of all the tumbler pins 10 and the bottom pins 11 on the shear lines of the stator 3 and the magazine portion 8 corresponding to the depths individually set in the portions 21. Tumbler tablets Oite,
An extension portion 1 a that extends in the forward direction of the front end portion 14 of the rotor 6 is formed on the fixed body 1, and an extension portion 19 a corresponding to the extension portion 1 a of the fixed body 1 is formed on the cylindrical portion 19 of the key 18. The defense magazine 23 is rotatably arranged in the cylindrical hollow portion 2a of the extension portion 1a, and a circular key insertion hole 24 is formed in the center of the defense magazine 23 in the axial direction. The tumbler pin 10 The inwardly stepped portion 13 with which the front end of the protective magazine 23 abuts is formed in the proximal end portion of the defense magazine 23, the positioning groove 16 is formed on the inner peripheral surface of the defense magazine 23, and a plurality of drives are provided on the extension portion 1 a. A pin hole 25 is formed in the radial direction, a defense pin hole 26 is formed in the defense magazine 23 corresponding to the drive pin hole 25 in the radial direction, and a key code is formed in the drive pin hole 25 and the defense pin hole 26. In response to The accommodating a biased drive pin 28 in the centripetal direction in defense pin 27 and the spring 29 is individually set, place the tumbler pins 10 of the plurality of the positions right behind said plurality of protection pin 27 is, An annular recess 30 is formed on the outer peripheral surface of the extended portion 19a of the key 18 so as to face the defense pin hole 26, and the positioning protrusion 20 is engaged with the positioning groove 16 at the final insertion position of the key 18. The drive protrusions 22 are engaged with the passive grooves 18, and the contact points of all the defense pins 27 and the drive pins 28 corresponding to the depths individually set in the annular recesses 30 are defined in the defense magazine 23. It is made to move on the shear line with the said extension part 1a of the fixed main body 1.

In the axial tumbler lock according to the first aspect of the present invention, when the key 18 having the operation step portion 21 and the annular recess 30 formed in the cylindrical portion 19 and the extending portion 19a according to a predetermined key code is used, the key 18 At the final insertion position, the contact points of all the tumbler pins 10 and the bottom pins 11 move on the shear line between the stator 3 and the magazine portion 8 corresponding to the depth of each operation step portion 21, while the annular recess 30 The contact points of all the defense pins 27 and the drive pins 28 are moved on the shear line between the rotary magazine 23 and the extension 1a of the fixed body 1 corresponding to the depth. At this time, the positioning projection 20 on the key 18 side. rotation Misao There while protrudes from the positioning groove 16 of the defense magazine 23 side, the driving projections 22 of the key 18 side is engaged with the passive groove 17 of the rotor 6 side, a key 18 By, the rotor 6 is rotated in the same direction, unlocking by the locking member mounted on the locking shaft portion 7 is executed.

However, when the key 18 having the operation step portion 21 and the annular recess 30 formed in accordance with a predetermined key code is not used, the contact points of all the tumbler pins 10 and the bottom pins 11 are the stator 3 at the final insertion position of the key 18. Since the contact points of all the defense pins 27 and the drive pins 28 do not move on the shear line between the rotating magazine 23 and the extension 1a of the fixed body 1, the drive protrusions are not moved. Even if 22 is engaged with the passive groove 17 , the rotor 6 cannot be rotated by the key 18.

Even if it is attempted to move the contact points of all the tumbler pins 10 and the bottom pins 11 on the shear line between the stator 3 and the magazine portion 8 by using the conventional picking tool as described above, the key insertion hole 24 of the defense magazine 23 is used. Therefore, the picking tool cannot access the tumbler pin 10 from the front direction.
The arrangement direction of the defense pins 27 and the original tumbler pins 10 constituting the defense mechanism is that the former is the radial direction of the defense magazine 23, whereas the latter is the axial direction of the rotor 6, and the phase is 90 degrees. Therefore, it is very difficult to perform a picking operation in which the defense pin 27 and the tumbler pin 10 are simultaneously accessed and moved by a predetermined distance. High performance pin tumbler tablets can be obtained.
Further, since the plurality of tumbler pins 10 are arranged at positions immediately behind the plurality of defense pins 27, the picking operation to each of the tumbler pins 10 is obstructed, and the defense performance is improved accordingly.

In the axial tumbler lock according to the invention of claim 2, when the key 18 having the operation step portion 21 and the annular recess 30 formed in the cylindrical portion 19 and the extending portion 19a according to a predetermined key code is used, the key 18 At the final insertion position, the contact points of all the tumbler pins 10 and the bottom pins 11 move on the shear line between the stator 3 and the magazine portion 8 corresponding to the depth of each operation step portion 21, while the annular recess 30 The contact points of all the defense pins 27 and the drive pins 28 are moved on the shear line between the rotary magazine 23 and the extension 1a of the fixed body 1 corresponding to the depth. At this time, the positioning projection 20 on the key 18 side. rotation operation but while engaged with the positioning groove 16 of the defense magazine 23 side, the driving projections 22 of the key 18 side is engaged with the passive groove 17 of the rotor 6 side, a key 18 By Rukoto, protection magazine 27 and the rotor 6 is rotated in the same direction, unlocking by the locking member mounted on the locking shaft portion 7 is executed.

However, when the key 18 having the operation step portion 21 and the annular recess 30 formed in accordance with a predetermined key code is not used, the contact points of all the tumbler pins 10 and the bottom pins 11 are the stator 3 at the final insertion position of the key 18. Since the contact points of all the protection pins 27 and the drive pins 28 do not move on the shear line between the rotary magazine 23 and the extension 1a of the fixed body 1, the positioning protrusions do not move. Even if 20 is engaged with the positioning groove 16 and the drive protrusion 22 is engaged with the passive groove 17 , the defense magazine 27 and the rotor 6 cannot be rotated by the key 18.

Even if it is attempted to move the contact points of all the tumbler pins 10 and the bottom pins 11 on the shear line between the stator 3 and the magazine portion 8 by using the conventional picking tool as described above, the key insertion hole 24 of the defense magazine 23 is used. Therefore, the picking tool cannot access the tumbler pin 10 from the front direction.
The arrangement direction of the defense pins 27 and the original tumbler pins 10 constituting the defense mechanism is that the former is the radial direction of the defense magazine 23, whereas the latter is the axial direction of the rotor 6, and the phase is 90 degrees. Therefore, it is very difficult to perform a picking operation in which the defense pin 27 and the tumbler pin 10 are simultaneously accessed and moved by a predetermined distance. High performance pin tumbler tablets can be obtained.
Further, since the plurality of tumbler pins 10 are arranged at positions immediately behind the plurality of defense pins 27, the picking operation to each of the tumbler pins 10 is obstructed, and the defense performance is improved accordingly.

1 to 6 and the embodiment of the invention of claim 2 shown in FIGS. 7 to 12, the stator constituted separately from the fixed body 1. 3 is fitted into the rear end cavity of the fixed body 1 and is fixed to the fixed body 1 by a fixing screw 31 in the radial direction. The fixed main body 1 is fitted into the mounting object 33, for example, the mounting hole 33 of the door 32 of the equipment box from the front side, and the outer peripheral threaded portion 35 at the rear end in a state where the outer peripheral step surface 34 is in contact with the front surface of the door 32. It is fastened and fixed to the door 32 by a hexagon nut 36 that is screwed onto the door 32. The locking shaft portion 7 of the rotor 6 fitted in the bearing hole 4 of the stator 3 protrudes to the rear surface side of the fixed body 1, and a locking plate 38 is fitted to the rear end corner shaft portion 37 of the locking shaft portion 7. The locking plate 38 is fixed to the locking shaft portion 7 by hexagon bolts 39. The forward movement of the defense magazine 23 is restricted by another means.

The spring 12 that urges the bottom pin 11 in the forward direction is constituted by a compression coil spring, and the spring 19 that urges the drive pin 28 in the centripetal direction is also constituted by a compression coil spring. Since the bottom pin hole 5 is formed so as not to penetrate the stator 3, the end of the spring 12 is supported by the bottom surface of the bottom pin hole. Since the drive pin hole 25 is formed so as to penetrate through the extension 1 a of the fixed body 1, the spring support member 40 is fitted and fixed to the open end of the drive pin hole 25.

Although seven defense pins 27 are provided in a radial manner at intervals of 45 degrees, the arrangement angle and the number of the defense pins 27 are not limited to this, and increase or decrease corresponding to the required defense performance level. can do. Seven tumbler pins 10 are provided on the same circumference at intervals of 45 degrees, but this can be increased or decreased as appropriate. In each of the illustrated embodiments, the tumbler pin 10 is disposed at a position immediately behind the defense pin 27. As a result, the picking operation to the tumbler pin 10 is obstructed, and the defense performance is improved accordingly.
Further, when the defense pins 27 are arranged on a plurality of different cross sections along the axial direction of the defense magazine 23 as in the illustrated embodiments, the defense performance is significantly improved. The number of cross-sections of the defense pins 27 is not limited to that shown in the figure, and can be increased or decreased as appropriate.

The magazine portion 8 at the middle portion of the rotor 6 is fitted into the enlarged diameter cavity portion 41 at the rear end portion of the defense magazine 23. In the locked state in which the key 18 is removed from the key insertion hole 24 of the defense magazine 23, the front end portion of the bottom pin 11 enters the tumbler pin hole 9, so that the rotor 6 is restrained so as not to rotate with respect to the stator 3. . Further, in the locked state, the inner end portion of the drive pin 28 enters the defense pin hole 26, so that the defense magazine 23 is restrained against rotation with respect to the extension portion 1 a of the fixed body 1.

The key 18 is formed by fitting and fixing a knob plate 43 in the axially dividing groove portion 42 of the cylindrical portion 19, and the positioning protrusion 20 and the driving protrusion 22 on the key 18 side are extended plate portions 44 of the knob plate 43. Are formed integrally with the inner edge and the outer edge of the tip. Each operation step portion 21 is formed in a semi-cylindrical shape, and the depth from the distal end surface of the tubular portion 19 is changed according to the assigned key code. Each annular recess 30 is formed in a semicircular cross section, and the depth from the outer peripheral surface of the extending portion 19a is changed according to the assigned key code.

In the embodiment of the first aspect of the invention, since the axial length of the positioning projection 20 is set short, the positioning projection 20 of the defense magazine 23 is at the final insertion position of the key 18 as shown in FIG. The drive projection 22 is engaged with the passive groove 18 of the rotor 6 while projecting from the end portion of the positioning groove 16 and entering the clearance space 45 between the magazine portion 8 and the step portion 13. Therefore, the rotational force applied via the knob plate 42 is transmitted only to the rotor 6.

In the embodiment of the invention of claim 2, since the axial length of the positioning projection 20 is set long, the positioning projection 20 of the defense magazine 23 is at the final insertion position of the key 18 as shown in FIG. The drive protrusion 22 is engaged with the passive groove 18 of the rotor 6 while engaging with the end portion of the positioning groove 16. Therefore, the rotational force applied through the knob plate 42 is transmitted to both the defense magazine 23 and the rotor 6.

In the embodiment of the invention of claim 1, in the final insertion position, the contact points of all the tumbler pins 10 and the bottom pins 11 are moved on the shear line between the stator 3 and the magazine portion 8, Since the contact point of the defense pin 27 and the drive pin 28 has moved on the shear line between the rotary magazine 23 and the extension 1 a of the fixed body 1, when the key 18 is turned, the rotor 6 moves relative to the fixed body 1. Rotated. During the rotation of the key 18, the positioning projection 20 of the key 18 idles in the escape space 45, and the tip of the defense pin 27 on the defense magazine 23 side relatively moves in the annular recess 30 on the key 18 side.

In the embodiment of the invention of claim 2, in the final insertion position, the contact points of all the tumbler pins 10 and the bottom pins 11 are moved on the shear line between the stator 3 and the magazine portion 8, Since the contact point of the defense pin 27 and the drive pin 28 moves on the shear line between the rotation magazine 23 and the extension 1a of the fixed body 1, the defense magazine 27 and the rotor 6 are fixed to the fixed body when the key 18 is turned. 1 is rotated.

It is a front view of the key extraction state of the axial direction pin tumbler lock with a defense mechanism which concerns on one Example of invention of Claim 1. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 and the key is in a final insertion position. FIG. 2 is a cross-sectional view taken along line B-B in FIG. 1, and the key is in a final insertion position. FIG. 3 is a cross-sectional view taken along the line C-C in FIG. 2 and the key is in a final insertion position. It is a side view of the key used for the axial direction tumbler lock of FIG. 1, and has shown the front-end | tip part of the cylindrical part partly notched. It is a rear view of the key of FIG. It is a front view of the key extraction state of the axial direction pin tumbler lock with a defense mechanism which concerns on one Example of invention of Claim 2. FIG. 8 is a sectional view taken along line D-D in FIG. 7, and the key is in a final insertion position. FIG. 8 is a cross-sectional view taken along the line E-E in FIG. 7 and the key is in a final insertion position. FIG. 9 is a cross-sectional view taken along line FF in FIG. 8 and the key is in a final insertion position. It is a side view of the key used for the axial direction tumbler lock of FIG. 7, and has shown the front-end | tip part of the cylindrical part partly notched. It is a rear view of the key of FIG.

DESCRIPTION OF SYMBOLS 1 Fixed body 1a Extension part 2 of fixed body 3 Cylindrical cavity part 3 Stator 4 Bearing hole 5 Bottom pin hole 6 Rotor 7 Locking shaft part 8 Magazine part 9 Tumbler pin hole 10 Tumbler pin 11 Bottom pin 12 Spring 13 Inward step part 14 Rotor part Front end portion 15 Annular key hole 16 Positioning groove 17 Passive groove 18 Key 19 Tubular portion 19a Tubular portion extending portion 20 Positioning projection 21 Operation step portion 22 Drive projection 23 Defense magazine 24 Key insertion hole 25 Drive pin hole 26 Defense pin hole 27 Protective pin 28 Drive pin 29 Spring 30 Annular recess 31 Fixing screw 32 Door 33 Mounting hole 34 Outer peripheral step surface 35 Outer peripheral threaded portion 36 Hexagon nut 37 Rear end angular shaft portion 38 Locking plate 39 Hexagon bolt 40 Spring support member 41 Expanded cavity Part 42 Split groove part 43 Knob plate 44 Extension plate part 45 Escape space

Claims (2)

A stator 3 is arranged on the bottom side of the cylindrical cavity 2 of the fixed body 1, a bearing hole 4 is formed in the axial direction in the center of the stator 3, and a plurality of bottom pin holes 5 are made identical from the front surface of the stator 3. It is arranged on the circumference and formed in the axial direction, and the rotor 6 is rotatably accommodated in the cylindrical cavity 2, the locking shaft portion 7 at the rear of the rotor 6 is fitted into the bearing hole 4, A plurality of tumbler pin holes 9 are formed in the magazine portion 8 in the middle of the rotor 6 in the axial direction, and the lengths of the tumbler pin holes 9 and the bottom pin holes 5 that communicate with each other are individually set according to the key code. The tumbler pin 10 and the bottom pin 11 urged forward by the spring 12 are accommodated, the front end of the tumbler pin 10 is brought into contact with the back surface of the inwardly stepped portion 13 of the fixed body 1, and the inwardly stepped portion 13. Inner surface and the low -6, an annular key hole 15 is formed between the front end portion 14 and the outer peripheral surface of the front end portion 14, and a positioning groove 16 opening in the annular key hole 15 is formed in the inner peripheral surface of the inward stepped portion 13 in the axial direction. A passive groove 17 is formed in the axial direction on the outer peripheral surface of the front end portion 14 of the rotor 6, and the positioning protrusion 20 and the tumbler pin 14 are fitted on the outer peripheral surface of the cylindrical portion 19 of the key 18 in the positioning groove 16. An operation step portion 21 that pushes the front end of the cylindrical portion 19 is formed, and a driving protrusion 22 that is fitted into the passive groove 17 is provided on the inner peripheral surface of the distal end portion of the cylindrical portion 19, and the depth is set individually for each operation step portion 21. Correspondingly, in the axial pin tumbler lock in which the contact points of all the tumbler pins 10 and the bottom pins 11 are moved on the shear line of the stator 3 and the magazine portion 8,
An extension portion 1 a that extends in the forward direction of the front end portion 14 of the rotor 6 is formed on the fixed body 1, and an extension portion 19 a corresponding to the extension portion 1 a of the fixed body 1 is formed on the cylindrical portion 19 of the key 18. The defense magazine 23 is rotatably arranged in the cylindrical hollow portion 2a of the extension portion 1a, and a circular key insertion hole 24 is formed in the center of the defense magazine 23 in the axial direction. The tumbler pin 10 The inwardly stepped portion 13 with which the front end of the protective magazine 23 abuts is formed in the proximal end portion of the defense magazine 23, the positioning groove 16 is formed on the inner peripheral surface of the defense magazine 23, and a plurality of drives are provided on the extension portion 1 a. A pin hole 25 is formed in the radial direction, a defense pin hole 26 is formed in the defense magazine 23 corresponding to the drive pin hole 25 in the radial direction, and a key code is formed in the drive pin hole 25 and the defense pin hole 26. In response to The accommodating a biased drive pin 28 in the centripetal direction in defense pin 27 and the spring 29 is individually set, place the tumbler pins 10 of the plurality of the positions right behind said plurality of protection pin 27 is, An annular recess 30 is formed on the outer peripheral surface of the extended portion 19a of the key 18 so as to face the defense pin hole 26, and the positioning projection 20 protrudes from the positioning groove 16 at the final insertion position of the key 18, while the The drive protrusions 22 are engaged with the passive grooves 18, and the contact points of all the defense pins 27 and the drive pins 28 are fixed to the defense magazine 23 corresponding to the depths individually set in the annular recesses 30. An axial pin tumbler lock with a protective mechanism, which is moved on a shear line with the extension 1a of the main body 1. A stator 3 is arranged on the bottom side of the cylindrical cavity 2 of the fixed body 1, a bearing hole 4 is formed in the axial direction in the center of the stator 3, and a plurality of bottom pin holes 5 are made identical from the front surface of the stator 3. It is arranged on the circumference and formed in the axial direction, and the rotor 6 is rotatably accommodated in the cylindrical cavity 2, the locking shaft portion 7 at the rear of the rotor 6 is fitted into the bearing hole 4, A plurality of tumbler pin holes 9 are formed in the magazine portion 8 in the middle of the rotor 6 in the axial direction, and the lengths of the tumbler pin holes 9 and the bottom pin holes 5 that communicate with each other are individually set according to the key code. The tumbler pin 10 and the bottom pin 11 urged forward by the spring 12 are accommodated, the front end of the tumbler pin 10 is brought into contact with the back surface of the inwardly stepped portion 13 of the fixed body 1, and the inwardly stepped portion 13. Inner surface and the low -6, an annular key hole 15 is formed between the front end portion 14 and the outer peripheral surface of the front end portion 14, and a positioning groove 16 opening in the annular key hole 15 is formed in the inner peripheral surface of the inward stepped portion 13 in the axial direction. A passive groove 17 is formed in the axial direction on the outer peripheral surface of the front end portion 14 of the rotor 6, and the positioning protrusion 20 and the tumbler pin 14 are fitted on the outer peripheral surface of the cylindrical portion 19 of the key 18 in the positioning groove 16. An operation step portion 21 that pushes the front end of the cylindrical portion 19 is formed, and a driving protrusion 22 that is fitted into the passive groove 17 is provided on the inner peripheral surface of the distal end portion of the cylindrical portion 19, and the depth is set individually for each operation step portion 21. Correspondingly, in the axial pin tumbler lock in which the contact points of all the tumbler pins 10 and the bottom pins 11 are moved on the shear line of the stator 3 and the magazine portion 8,
An extension portion 1 a that extends in the forward direction of the front end portion 14 of the rotor 6 is formed on the fixed body 1, and an extension portion 19 a corresponding to the extension portion 1 a of the fixed body 1 is formed on the cylindrical portion 19 of the key 18. The defense magazine 23 is rotatably arranged in the cylindrical hollow portion 2a of the extension portion 1a, and a circular key insertion hole 24 is formed in the center of the defense magazine 23 in the axial direction. The tumbler pin 10 The inwardly stepped portion 13 with which the front end of the protective magazine 23 abuts is formed in the proximal end portion of the defense magazine 23, the positioning groove 16 is formed on the inner peripheral surface of the defense magazine 23, and a plurality of drives are provided on the extension portion 1 a. A pin hole 25 is formed in the radial direction, a defense pin hole 26 is formed in the defense magazine 23 corresponding to the drive pin hole 25 in the radial direction, and a key code is formed in the drive pin hole 25 and the defense pin hole 26. In response to The accommodating a biased drive pin 28 in the centripetal direction in defense pin 27 and the spring 29 is individually set, place the tumbler pins 10 of the plurality of the positions right behind said plurality of protection pin 27 is, An annular recess 30 is formed on the outer peripheral surface of the extended portion 19a of the key 18 so as to face the defense pin hole 26, and the positioning protrusion 20 is engaged with the positioning groove 16 at the final insertion position of the key 18. The drive protrusions 22 are engaged with the passive grooves 18, and the contact points of all the defense pins 27 and the drive pins 28 corresponding to the depths individually set in the annular recesses 30 are defined in the defense magazine 23. An axial pin tumbler lock with a defense mechanism, wherein the axial pin tumbler lock is moved on a shear line with the extension 1a of the fixed body 1.

Images