JP4741418B2 - Key rotor and cylinder lock provided with the same - Google Patents

Description

  The present invention relates to a key rotor for locking and unlocking a door lock mechanism of a vehicle door panel, for example, and a cylinder lock including the key rotor.

  As is well known, a cylinder lock for locking / unlocking a door lock mechanism of a door panel is incorporated in a vehicle such as an automobile.

  Generally, this type of cylinder lock is connected to a door lock mechanism via a link (lever), and includes a rotor that is rotated by an insertion (insertion) rotation operation of a regular key (match key).

  In such a cylinder lock, when the rotor is rotated by inserting and rotating the match key, this rotational force is transmitted to the door lock mechanism via the lever, and the door lock mechanism is brought into the locked / unlocked state accordingly. Can be switched.

  By the way, a zinc die casting method is widely used for manufacturing a rotor in this type of cylinder lock because it is excellent in moldability and mass productivity and is suitable for precision casting.

  However, zinc die cast parts are relatively soft and easily damaged. For this reason, in the cylinder lock, various measures are taken in order to prevent destruction of the rotor or the like by unauthorized means using a screw driver or other tools.

  Conventionally, as this type of cylinder lock, for example, the one shown in FIG. 6 is known (see Patent Document 1). This cylinder lock will be described with reference to FIG.

  As shown in FIG. 6, the cylinder lock 61 is fitted into a rotor case (not shown) as an exterior member, a rotor 62 having a block attachment hole 62A and a key insertion / extraction hole 62B, and a block attachment hole 62A of the rotor 62. A block 63 for preventing destruction of the rotor made of cemented carbide and a locking member 64 for locking the block 63 to the rotor 62 are provided.

  The rotor 62 is provided with a concave groove 62C for mounting the locking member 64 and a tumbler pin hole 62D for arranging a tumbler pin (not shown). A shaft portion 62E for connecting to a lock mechanism (not shown) projects from the end surface of the rotor 62 opposite to the key insertion side (the end surface opposite to the end surface on which the key insertion hole 62B is formed). Yes. On the key insertion side end surface of the rotor 62, a flange portion 62F that abuts against the inner surface of the rotor case is projected.

  Further, the rotor breakage prevention block 63 is provided with a key insertion hole 63A for inserting a match key and a concave groove 63B for mounting the locking member 64 together with the concave groove 62C to the rotor 62. .

In such a cylinder lock 61, for example, when an unauthorized key is inserted into the key insertion hole 62B of the rotor 62, it is inserted into the key insertion hole 63A of the block 63. In this state, if the key operator tries to pry the key insertion hole 62B with an illegal key, the illegal key hits the block 63 (the inner surface of the key insertion hole 63A), and therefore, the key insertion hole 62B is prevented from being opened by the illegal key. The destruction of 62 is prevented.
JP-A-8-86129

  However, according to the cylinder lock of Patent Document 1, since the block 63 for preventing rotor destruction is arranged in the middle of the axial direction of the rotor 62, the flange portion 62F of the rotor 62 and the inside thereof are easily broken, and sufficient destruction is achieved. There was a problem that the prevention effect could not be obtained.

  Further, the fact that the block 63 is arranged in the middle of the rotor 62 in the axial direction necessitates setting the length of the match key in the axial direction to a large dimension, which increases the manufacturing cost of the match key. .

  Accordingly, an object of the present invention is to provide a key rotor capable of obtaining a sufficient destruction prevention effect and reducing the manufacturing cost of the match key, and a cylinder lock including the key rotor.

[1] In order to achieve the above object, the present invention has a key insertion hole with one end opened on the rotor end surface and an arrangement hole for arranging a key collating member communicating with the key insertion hole, and is subjected to hard processing. A first rotor element that forms a key insertion side portion of the key insertion / extraction hole and a second rotor element that forms a part including a key non-insertion side portion of the key insertion / extraction hole. The second rotor element provides a key rotor characterized in that an assembling projection and a recess provided on each outer peripheral edge are fitted and assembled.

[2] In order to achieve the above object, the present invention has a key insertion hole with one end opened on the rotor end surface and an arrangement hole for arranging a key collating member communicating with the key insertion hole, and is subjected to hard processing. A first rotor element that forms a key insertion side portion of the key insertion / extraction hole and a second rotor element that forms a portion including a key non-insertion side portion of the key insertion / extraction hole by a metal material comprising:
A key rotor is provided in which a plurality of notches opened on an outer peripheral surface are provided at a key insertion side end of the second rotor element .

[3] In order to achieve the above object, the present invention has a key insertion hole with one end opened on the rotor end surface and an arrangement hole for arranging a key collating member communicating with the key insertion hole. A key rotor, which is formed of a metal material that has been processed, and is provided with a narrow body portion by forming a notch in the circumferential direction in the vicinity of the end portion on the key insertion side of the rotor . provide.

[4] In order to achieve the above object, according to the present invention, in a cylinder lock including a rotor case and a key rotor housed in the rotor case, a key insertion / extraction hole whose one end opens at a rotor end surface and the key A first rotor element having an arrangement hole for arranging a key collating member communicating with the insertion / extraction hole, and forming a key insertion side portion of the key insertion / extraction hole with a metal material subjected to a hard treatment, and a key reaction of the key insertion / extraction hole It consists of a second rotor element that forms a part including an insertion side part, and the first rotor element and the second rotor element are assembled by fitting a convex part and a concave part provided on the outer peripheral edge thereof. A cylinder lock is provided.
[5] In order to achieve the above object, the present invention provides a rotor case,
A cylinder lock having a key rotor housed in the rotor case, and having a key insertion hole with one end opened on a rotor end surface and an arrangement hole for arranging a key verification member communicating with the key insertion hole, and a hard treatment A first rotor element that forms a key insertion side portion of the key insertion / extraction hole and a second rotor element that forms a part including a key non-insertion side portion of the key insertion / extraction hole. A cylinder lock is provided in which a plurality of notches opened on an outer peripheral surface are provided at an end of a rotor element on a key insertion side.
[6] In order to achieve the above object, according to the present invention, in a cylinder lock including a rotor case and a key rotor housed in the rotor case, a key insertion / extraction hole whose one end opens at a rotor end surface and the key An arrangement hole for arranging a key collating member communicating with the insertion / extraction hole is formed, and the entire rotor is formed of a metal material that is subjected to a hard treatment, and in the circumferential direction in the vicinity of the key insertion side end of the rotor. Provided is a cylinder lock in which a narrow body portion is provided by forming a notch.

  According to the present invention, a sufficient destruction prevention effect can be obtained, and the manufacturing cost of the match key can be reduced.

[First embodiment]
FIG. 1 is a sectional view showing a usage state of a cylinder lock provided with a key rotor according to a first embodiment of the present invention. FIG. 2 is a view showing an assembled state of the key rotor according to the first embodiment of the present invention. 2A is a front view, FIG. 2B is a side view, and FIG. 2C is an AA cross-sectional view of FIG. 2A. FIG. 3 is a diagram showing a first rotor element of the key rotor according to the first embodiment of the present invention. 3A shows a front view, and FIG. 3B shows a side view. FIG. 4 is a diagram showing a second rotor element of the key rotor according to the first embodiment of the present invention. 4A shows a front view, and FIG. 4B shows a side view.

[Overall configuration of cylinder lock]
In FIG. 1, a cylinder lock denoted by reference numeral 1 includes a rotor case 2 as an exterior member, a rotor (key rotor) 3 that can be rotated by inserting and rotating a regular key (match key) K, and the rotor 3. It is mainly composed of a lever 4 that swings in conjunction with rotation.

(Configuration of rotor case 2)
As shown in FIG. 1, the rotor case 2 has a bottomed corner having an inner space 2 </ b> A that is open in the insertion direction of the match key K (rightward in FIG. 1) and that accommodates the rotor 3 in a detachable manner. It is formed of a cylindrical body. For example, it is fixed to a vehicle door panel (not shown).

  As shown in FIG. 1, a key insertion hole 2 </ b> B through which the match key K is inserted is provided on the key insertion side end surface (bottom) of the rotor case 2. A substantially cylindrical protector 2C protruding in the key insertion direction is integrally provided at the end of the rotor case 2 opposite to the key insertion side. In the middle of the rotor case 2 in the axial direction, a drain port 2D that opens to the outer peripheral surface of the case is provided.

(Configuration of rotor 3)
As shown in FIGS. 2A to 2C, the rotor 3 is formed by assembling the first rotor element 3 </ b> A and the second rotor element 3 </ b> B, and is rotatably accommodated in the internal space 2 </ b> A of the rotor case 2. Yes. Then, the movement of the rotor 3 in the key drawing direction (left direction in FIG. 1) is moved by the inner opening periphery of the key insertion hole 2B, and the movement of the rotor 3 in the key insertion direction by the rotor retaining plate (not shown). Are regulated. The rotor 3 is given a return habit by a spring (not shown). The rotor 3 is provided with a key insertion / extraction hole 3C having one end opened in the key extraction direction across the first rotor element 3A and the second rotor element 3B.

  As shown in FIGS. 3A and 3B, the first rotor element 3A is formed of a substantially disk-shaped member, and is subjected to a quenching process as a hard process on a press-formed body such as carbon steel for machine structure (for example, S45C). It is formed by applying. And the key insertion side part a of 3 C of key insertion / extraction holes is formed, and it is comprised so that it may function as a member for rotor destruction prevention similarly to the conventional block 63 (shown in FIG. 6).

  A flange 3a that abuts against a stepped portion 2a (shown in FIG. 1) of the internal space 2A is integrally provided on the outer peripheral edge of the first rotor element 3A. At the end of the first rotor element 3A opposite to the key insertion side, an assembling recess 3D (shown in FIG. 1) communicating with the key insertion side a of the key insertion hole 3C is provided. On the outer peripheral edge of the first rotor element 3A (a part decentered from the center of the first rotor element 3A), two concave portions 3E and 3E for positioning are arranged in parallel at equal intervals in the circumferential direction.

  The 2nd rotor element 3B consists of a substantially cylindrical member as shown to Fig.4 (a) and (b), and the whole is formed, for example with the zinc die-cast member. And it is comprised so that the site | part containing the key reverse insertion side part of 3 C of key insertion / extraction holes may be formed.

  On the outer peripheral edge of the end surface on the key insertion side of the second rotor element 3B, positioning convex portions 3F and 3F that project in the key pulling direction and fit into the two concave portions 3E and 3E of the first rotor element 3A are integrated. Is provided. A convex portion 3P for assembly that fits into the concave portion 3D of the first rotor element 3 is provided at the center of the end surface of the second rotor element 3B on the key insertion side.

  The key insertion side end of the second rotor element 3B is provided with a plurality of notches 3I and 3I that open to the outer peripheral surface. Thereby, when a rotational torque larger than a predetermined rotational torque is applied to the second rotor element 3B by an operation of turning an illegal key or drill into the rotor 3 (key insertion side portion a of the key insertion / extraction hole 3C), the notch is cut out. The stress concentrates on the portions in the vicinity of 3I and 3I, the second rotor element 3B is broken from the portions in the vicinity of the notches 3I and 3I, and the key insertion side portion a in the key insertion / extraction hole 3C is prevented from being opened.

  A stepped lever fitting space 3J that opens in the rotor radial direction and the key insertion direction is provided at the end of the second rotor element 3B opposite to the key insertion side. Further, a concave groove 3K having plate contact surfaces 3k, 3k (only one is shown) is provided at two circumferential positions at the end opposite to the key insertion side of the second rotor element 3B. The rotor retaining plate described above is fitted in the concave groove 3K. The circumferential dimension between the two plate contact surfaces 3k, 3k is set to be approximately the same as the rotation stroke of the rotor 3.

  A flash removal hole 3N and a drainage hole 3M (both shown in FIG. 2B) communicating with the key insertion / extraction hole 3C are provided at the center in the axial direction of the second rotor element 3B. Further, a match key abutting protrusion 3O (shown in FIG. 1) that protrudes in the water withdrawal hole 3M in the key withdrawal direction is integrally provided at the central portion in the axial direction of the second rotor element 3B. .

  The second rotor element 3B has a plurality of (four) tumbler arrangement holes (key verification member arrangement holes) 3G, 3G,..., Which penetrate in a direction perpendicular to the axis of the rotor 3 and communicate with the key insertion / extraction hole 3C. 2 (b) is provided along the key insertion / extraction direction. The second rotor element 3B has a plurality of (eight) spring arrangement holes 3H, 3H,... (8) that open in a direction perpendicular to the axis of the rotor 3 and communicate with the tumbler arrangement holes 3G, 3G,. 2 (b) is provided along the key insertion / extraction direction. Two adjacent spring arrangement holes 3H, 3H among the plurality of spring arrangement holes 3H, 3H,... Are opened in different directions.

  In the tumbler arrangement holes 3G, 3G,..., A plurality of tumblers (key collating members) 8 are disposed so as to be able to advance and retract in a direction perpendicular to the axis of the rotor 3 as shown in FIG. A plurality of tumblers 8, 8,... Are arranged at a predetermined interval in the axial direction of the rotor 3. Among these, two adjacent tumblers 8, 8 are opposite to each other (rotor) by a tumbler return spring (not shown). 3 above and below the axis 3. The tumblers 8, 8,... Are provided with key fitting holes 8A, 8A,. On the inner surface of the key fitting holes 8A, 8A,..., Convex portions 8a, 8a,. Tumble return springs (not shown) are arranged in the spring arrangement holes 3H, 3H,.

(Configuration of lever 4)
As shown in FIG. 1, the lever 4 comprises a shaft-like body having a flat part (not shown) and a flange part 4B on the door lock mechanism side and the rotor side, respectively, and the end part on the door lock mechanism side is inside the door panel. The door lock mechanism (both not shown) and the rotor side end are coupled to the rotor 3 in a lever fitting space 3J so as to be swingable. Then, as described above, the door 3 is rocked in conjunction with the rotation of the rotor 3 to lock and unlock the door lock mechanism. A pin portion 4C protruding in the key pulling direction is provided at the center of the end surface on the rotor side of the flange portion 4B. A cushion 7 made of cylindrical rubber that presses the flange portion 4B against the engagement step portion 3j of the lever fitting space 3J is attached to the pin portion 4C.

[Operation of cylinder lock 1]
In order to switch the door lock mechanism (not shown) from the locked state to the unlocked state, the match key K is inserted into the key insertion hole 2B of the rotor case 2 and is inserted into the key insertion hole 3C of the rotor 3. In this case, when the match key K is inserted into the key insertion hole 3C of the rotor 3, the convex portions 8a, 8a,... Of the plurality of tumblers 8, 8,. Thus, the rotor 3 becomes rotatable.

  Next, the match key K is rotated in a direction to release the locked state of the door lock mechanism. In this case, when the match key K rotates, this turning force is transmitted to the door lock mechanism via the lever 4, and accordingly, the door lock mechanism is switched from the locked state to the unlocked state.

  In the locked state of the door lock mechanism, for example, an unauthorized key or a drill is inserted into the key insertion / removal hole 3C of the rotor 3, and if an attempt is made to pry the key insertion / removal hole 3C with the unauthorized key or the like in this state, a hard process is performed. Since an unauthorized key or the like hits the rotor 3 (first rotor element 3A), the first rotor element 3A is not destroyed even when a rotational torque larger than a predetermined rotational torque acts on the first rotor element 3A, and the convex portion 3F , 3F is plastically deformed to release the fitting state with the recesses 3E, 3E. As a result, the first rotor element 3A idles on the key insertion side end surface of the second rotor element 3B, so that the key insertion hole 3C is prevented from being opened and the rotor 3 is prevented from being broken.

  On the other hand, to switch the door lock mechanism (not shown) from the unlocked state to the locked state, the match key K is inserted into the key insertion hole 2 </ b> B of the rotor case 2 and is inserted into the key insertion / extraction hole 3 </ b> C of the rotor 3. In this case, when the match key K is inserted into the key insertion / removal hole 3C of the rotor 3, the plurality of lock plates 8, 8,... Engage with the recesses 8a, 8a of the match key K at corresponding portions, respectively. 3 is in a rotatable state.

  Next, the match key K is rotated in the direction in which the door lock mechanism is locked. In this case, when the match key K rotates, this turning force is transmitted to the door lock mechanism via the lever 4, and accordingly, the door lock mechanism is switched from the unlocked state to the locked state.

[Effect of the first embodiment]
According to the first embodiment described above, the following effects can be obtained.

(1) Since the first rotor element 3A is formed of a metal material subjected to a hard treatment, the mechanical strength (hardness) of the key insertion side portion a of the rotor 3 can be increased, and sufficient in the rotor 3 An effect of preventing destruction can be obtained.

(2) The fact that the first rotor element 3A is hard-treated eliminates the need for blocks that are required in the middle in the axial direction of the conventional rotor. Thereby, the length of the match key in the axial direction can be shortened, and the cost of the match key can be reduced.

(3) If a rotational torque larger than a predetermined rotational torque is applied to the first rotor element 3A by an insertion / rotation operation of an illegal key or drill into the rotor 3 (the key insertion side portion a of the key insertion / extraction hole 3C), the projection is convex. Since the portion 3F is plastically deformed to release the fitting state with the recess 3E, the first rotor element 3A is idled on the key insertion side end surface of the second rotor element 3B, and the key insertion hole 3C is prevented from being opened. . As a result, the main part of the cylinder lock is not destroyed, and the unlocking operation of the vehicle door panel due to fraud can not be performed, so that the vehicle can be prevented from being stolen.

[Second Embodiment]
FIG. 5 is a side view for explaining the key rotor according to the second embodiment of the present invention. 5, the same members as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the rotor 51 as a key rotor shown in the second embodiment is characterized in that it is formed of a single member.

  For this reason, the rotor 51 is a hard material that uses, for example, a mixture of metal powder (for example, stainless steel) and a binder (a caking material that exhibits flow characteristics by temperature control) as a raw material by using, for example, the MIM (Metal Injection Molding) method. In other words, the entire rotor is formed of a metal material obtained by performing a hard treatment. As the metal powder that is the raw material of the rotor 3, metal powder such as alloy steel or tool steel / super steel alloy is used in addition to stainless steel. The key insertion side end A of the rotor 51 can be further enhanced in mechanical strength (hardness) by performing a quenching process.

  In the vicinity of the key insertion side end portion A of the rotor 51, a narrow body portion 51A is provided by forming two notches 51a, 51a arranged in parallel at equal intervals in the circumferential direction. As a result, when a rotational torque larger than a predetermined rotational torque is applied to the rotor 51 by inserting and rotating an unauthorized key or drill into the rotor 51 (key insertion / extraction hole 3C), stress concentrates on the narrow body portion 51A. The 51 thin body 51A is destroyed, and the key insertion hole 3C is prevented from being opened by an illegal key or the like.

[Effect of the second embodiment]
According to the second embodiment described above, the following effects can be obtained.

(1) Since the entire rotor 51 is formed of a metal material that is subjected to a hard treatment, the mechanical strength (hardness) of the entire rotor can be increased, and a sufficient fracture prevention effect in the rotor 51 can be obtained. it can.

(2) The fact that the rotor 51 is formed of a metal material that has been subjected to a hard treatment eliminates the need for blocks conventionally required for preventing rotor breakage. Thereby, the axial direction length of the match key K can be shortened, and the manufacturing cost of the match key can be reduced.

(3) The fact that a block is not required can reduce the number of parts and simplify the assembly work of the cylinder lock 1.

(4) Since the narrow body portion 51A is provided in the vicinity of the key insertion side end portion A of the rotor 51, a rotational torque larger than a predetermined rotational torque causes the rotor to rotate by inserting and rotating the unauthorized key or drill into the rotor 51. When acting on 51, stress concentrates on the narrow body portion 51A, the thin body portion 51A of the rotor 51 is destroyed, and the key insertion side portion a (shown in FIG. 2 (c)) in the key insertion hole 3C is prevented from being opened. Is done. As a result, the portion of the rotor 51 on the side opposite to the key insertion portion from the narrow body portion 51A is not destroyed, and the unlocking operation of the vehicle door panel due to fraud cannot be performed, thereby preventing the vehicle from being stolen. Can do.

  As mentioned above, although the key rotor (cylinder lock) of this invention was demonstrated based on said embodiment, this invention is not limited to said embodiment, In various aspects in the range which does not deviate from the summary. For example, the following modifications are possible.

(1) In each embodiment, the case where the whole of the first rotor element 3A or the rotor 51 is formed of a metal material subjected to a hard treatment has been described. However, the present invention is not limited to this, and the key insertion / extraction is performed. The part which forms at least the key insertion side part a of the hole 3C should just be formed with the metal material which gives a hard process.

(2) In each embodiment, the case where the present invention is applied to a door lock mechanism of a vehicle door panel has been described. However, the present invention is not limited to this, and each of the lock mechanism and steering lock device of a vehicle trunk / glove box is also provided. The present invention can be applied similarly to the embodiment.

Sectional drawing which shows the use condition of the cylinder lock provided with the key rotor which concerns on the 1st Embodiment of this invention. (A)-(c) is the front view, side view, and sectional drawing which show the assembly state of the key rotor which concerns on the 1st Embodiment of this invention. (A) And (b) is the front view and side view which show the 1st rotor element of the key rotor which concerns on the 1st Embodiment of this invention. (A) And (b) is the front view and side view which show the 2nd rotor element of the key rotor which concerns on the 1st Embodiment of this invention. The side view shown in order to demonstrate the key rotor which concerns on the 2nd Embodiment of this invention. The exploded perspective view shown in order to demonstrate the conventional key rotor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,61 ... Cylinder lock, 2 ... Rotor case, 2A ... Internal space, 2a ... Stepped part, 2B ... Key insertion hole, 2C ... Protector, 2D ... Drain port, 3, 51, 62 ... Rotor, 3A ... No. DESCRIPTION OF SYMBOLS 1 Rotor element, 3a ... Flange, 3B ... 2nd rotor element, 3C ... Key insertion side part, a ... Key insertion side part, 3D ... Assembling recessed part, 3E ... Positioning recessed part, 3F ... Positioning convex part, 3G: Tumbler arrangement hole, 3H: Spring arrangement hole, 3I, 51a ... Notch, 3J ... Lever fitting space, 3j ... Engagement step part, 3K ... Recessed groove, 3k ... Plate contact surface, 3M ... For removing burr Hole, 3N: drain hole, 3O: convex part for match key contact, 3P: convex part for assembly, 4 ... lever, 4B ... collar part, 4C ... pin part, 7 ... cushion, 8 ... tumbler, 8A ... key fitting hole, 8a ... convex portion, 51A ... Body, 62A ... Block mounting hole, 62B ... Key insertion / extraction hole, 62C ... Dove groove, 62D ... Tumbler pin hole, 62E ... Shaft part, 62F ... Hut, 63 ... Block, 63A ... Key insertion hole, 63B ... Dent groove, 64 ... locking member, K ... match key, k ... recess

Claims (6)

The rotor end face has a key insertion hole with one end opened and a placement hole for placing a key verification member communicating with the key insertion hole, and the key insertion side portion of the key insertion hole is formed by a metal material subjected to hard processing The first rotor element and the second rotor element forming a part including the key insertion side portion of the key insertion hole,
The key rotor according to claim 1, wherein the first rotor element and the second rotor element are assembled with fitting convex portions and concave portions provided on respective outer peripheral edges thereof. The rotor end face has a key insertion hole with one end opened and a placement hole for placing a key verification member communicating with the key insertion hole, and the key insertion side portion of the key insertion hole is formed by a metal material subjected to hard processing The first rotor element and the second rotor element forming a part including the key insertion side portion of the key insertion hole,
The key rotor according to claim 1, wherein a plurality of notches are formed in an outer peripheral surface at an end of the second rotor element on the key insertion side. The rotor end face has a key insertion hole with one end opened and an arrangement hole for arranging a key verification member communicating with the key insertion hole, and the entire rotor is formed of a metal material subjected to hard processing,
A key rotor characterized in that a narrow body portion is provided in the vicinity of a key insertion side end portion of the rotor by forming a notch in a circumferential direction. A rotor case,
In a cylinder lock provided with a key rotor housed inside the rotor case,
The rotor end face has a key insertion hole with one end opened and a placement hole for placing a key verification member communicating with the key insertion hole, and the key insertion side portion of the key insertion hole is formed by a metal material subjected to hard processing The first rotor element and the second rotor element forming a part including the key insertion side portion of the key insertion / extraction hole, wherein the first rotor element and the second rotor element are provided on respective outer peripheral edges. A cylinder lock characterized in that a convex part and a concave part for assembly are fitted and assembled. A rotor case,
In a cylinder lock provided with a key rotor housed inside the rotor case,
The rotor end face has a key insertion hole with one end opened and a placement hole for placing a key verification member communicating with the key insertion hole, and the key insertion side portion of the key insertion hole is formed by a metal material subjected to hard processing And a second rotor element forming a portion including a key reverse insertion side portion of the key insertion / extraction hole, and the key insertion side end portion of the second rotor element has a plurality of openings opened on an outer peripheral surface. A cylinder lock provided with a notch. A rotor case,
In a cylinder lock provided with a key rotor housed inside the rotor case,
The rotor end face has a key insertion hole with one end opened and an arrangement hole for arranging a key verification member communicating with the key insertion hole, and the entire rotor is formed of a metal material subjected to hard processing,
A cylinder lock characterized in that a narrow body portion is provided in the vicinity of a key insertion side end portion of the rotor by forming a notch in a circumferential direction.

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