JP2016118015A - Key for cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock key in which the key can easily be inserted into the lock even if a knob portion is picked and the blade is inserted into the keyhole of a lock in a rough angle as a premise, and the knob portion itself is operated after insertion of the blade into a keyhole, and thereby a rotational operating force of the knob portion is transmitted in the inner cylinder.SOLUTION: A lock key Y is characterized as follows: a blade 7 is rotatable while coming into slide contact with an inner circumferential surface 1a of a knob portion 1, at the time when a tip part 7b of the blade 7 is abutted and guided in an outwardly expanding guide surface of the keyhole of the lock, and in a state where a substantially central part of the knob portion 1 is slightly picked by fingers; alternatively, the knob portion 1 resists an elastic force of the material itself and is elastically displaced at the time when the tip part 7b of the blade 7 completely enters the keyhole, and in a state where the substantially central part of the knob portion 1 is strongly picked by the fingers; and the inner circumferential surface 1a is brought into pressures contact with an outer circumferential surface of the base end 7a of the blade 7, and thereby the knob portion 1 and the blade 7 are brought into an integrated state and a rotational operating force of the knob portion 1 is transmitted to the blade 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lock key for a joinery, and more particularly to a key that can be used for a cylinder lock for a joinery.

  Patent Document 1 is proposed by the applicant. In Patent Document 1, while pursuing as much as possible the convenience at the time of inserting a key, (1) a key body is provided rotatably on the knob portion and the knob portion, and the cross-sectional shape thereof is, for example, three rotations It is formed in a polygon more than symmetrical and has a blade having a key code on its outer peripheral surface, and when the key body is completely inserted into the key hole of the lock body, each of the inner cylinder and the key body An embodiment in which the rotational force of the key body is transmitted to the inner cylinder through the provided engaging means; and (2) a key body is provided rotatably on the knob portion and the knob portion, and the cross-sectional shape thereof is The key body includes a blade having a key code on the outer peripheral surface and a movable trigger that is provided on the knob portion and abuts against the front surface of the inner cylinder when inserted. When fully inserted into the keyhole of the lock body Through the backward movement of the trigger, and through the engagement means provided on each of the inner tube and the key body, the rotational force of the key body embodiment transmitted to the inner tube is described.

JP 2014-208958 A

  The invention of the present application was created on the extension line of the embodiment of the above (1) of Patent Document 1. The present invention is the main purpose of Patent Document 1, that is, a knob portion and a shaft that is freely rotatable on the knob portion. The key (key body) consisting of the supported blade can be easily inserted into the lock (lock body), and when the key is inserted into the lock, the operating force of the knob constituting the key is reliably transmitted to the lock. With this as a premise, the operation force of the finger is used as an “operation input switch” to obtain an integral engagement state of the knob portion and the rotatable blade with a rational configuration (for example, a simple configuration). In other words, after the key is inserted into the lock, the knob and the rotatable blade are joined together by the operation input switch, and as long as the operation input switch is working, the inner cylinder of the lock is applied and unlocked. Is what you can do.

  Depending on the embodiment, after inserting the blade of the key into the keyhole, gripping the knob portion itself, pressing the knob portion in the direction of the keyhole, or also picking the operation member or members, By pushing the movable side wall constituting the part into the inside, the knob part and the rotatable blade are surely integrated with each other.

  The key for the lock according to the present invention includes a knob portion formed of a material having elasticity, and is rotatably supported at a substantially central portion of the knob portion so that a base end portion thereof is not removed. A key for a lock comprising an outer peripheral surface of a tip portion continuous with an end portion having a polygonal shape having three or more rotational symmetry, and a blade having a key code on the outer peripheral surface. When the leading end of the blade hits the guide surface and is guided, the blade touches the inner peripheral surface of the picking portion when the finger is lightly picking the approximate center of the picking portion. On the other hand, when the tip part of the blade is completely inserted into the keyhole, the knob part is made of Elastically displaced against its own elastic force, By the peripheral surface pressed against the outer peripheral surface of the proximal end portion of the blade, said blade and said knob portion becomes integrally, the rotational operation force of 該摘 viewed portion is characterized in that it transmitted to the blade.

  The key for the lock according to the present invention is supported by a knob and a substantially central portion of the knob so that the proximal end of the knob is not removed, and a distal end continuous to the proximal end. A key for a lock comprising an outer peripheral surface formed in a polygonal shape having three or more rotational symmetry and having a key code on the outer peripheral surface, wherein the tip end portion of the blade is formed on an outer expansion guide surface of the key hole of the lock In the state where only the knob portion is picked with a finger when guided by hitting the blade, the blade can rotate while being supported by the knob portion, while the tip of the blade is When the operation member provided in the knob is pushed against the elastic force of the elastic body when fully inserted into the keyhole, the inner end of the operation member is the base of the blade. Press contact or engage the outer peripheral surface of the end It allows the blade and the knob portion are made integrally, the rotational operation force of 該摘 viewed portion is characterized in that it transmitted to the blade.

  Furthermore, the key for the lock according to the present invention is supported by a knob portion and a tip portion continuous to the base end portion, and is supported rotatably at a substantially central portion of the knob portion so that the base end portion does not come off. A key for a lock comprising an outer peripheral surface formed in a polygonal shape having three or more rotational symmetry and having a key code on the outer peripheral surface, wherein the tip end portion of the blade is formed on an outer expansion guide surface of the key hole of the lock In the state where only the knob portion is picked with a finger when guided by hitting the blade, the blade can rotate while being supported by the knob portion, while the tip of the blade is When the knob portion is fully inserted into the keyhole, the inner wall surface of the knob portion is pressed in the keyhole direction against the urging force of the urging means of the interior against the knob portion. Part of the blade outside the base end of the blade By the or engaging pressure to a portion, the blade and the knob portion are made integrally, the rotational operation force of 該摘 viewed portion is characterized in that it transmitted to the blade.

(A) According to the first aspect of the present invention, the key (key body) can be easily inserted into the lock (lock body) even if the knob is picked and the blade is inserted into the key hole of the lock at a rough angle. Assuming that the knob portion is formed of a material having elasticity, the knob portion and the blade are integrally coupled to each other by sandwiching the knob portion after inserting the blade into the keyhole. The rotational operation force of the knob can be transmitted to the inner cylinder. Since the outer peripheral surface of the blade is an engagement surface with respect to the engaged surface of the keyhole, the simple structure (two items of the knob portion and the blade) can be used without using complicated engagement means. The rotational operation force can be transmitted to the inner cylinder. Furthermore, a lock corresponding to a polygonal key having an outer peripheral surface of three or more rotational symmetry can be applied and unlocked.
(B) In the invention according to claim 2, in addition to the effect of (a), the knob portion is rotated on either the outer peripheral surface of the base end portion of the blade or the inner peripheral surface of the knob portion facing the outer peripheral surface. Since any of the engaging projections, engaging recesses, friction surfaces, and serrations for prevention is provided, the rotational operating force of the knob can be applied to the inner cylinder without using complicated engaging means such as a movable trigger. Can tell.
(C) In the invention according to claim 3, in addition to the effect of (a), one engaging means is provided on the outer peripheral surface of the base end portion of the blade, and the inner periphery of the knob portion facing the outer peripheral surface Since the other engaging means is provided on the surface, both engaging means are securely engaged.
(D) In the invention according to claim 4, the key (key body) can be easily inserted into the lock (lock body) even if the knob is picked and the blade is inserted into the key hole of the lock at a rough angle. Assuming that it is possible, after the blade is inserted into the keyhole, the rotational operating force of the knob can be transmitted to the inner cylinder while operating the operating means provided on the knob.
(E) In the invention according to claim 5, in addition to the effect of (d), a pair of operation members are provided at opposing positions, and when the pair of operation members are pushed in simultaneously, the base end of the blade is a pair of Since it is clamped by the inner end of the operating member, the rotational operating force of the knob can be reliably transmitted to the inner cylinder.
(F) In the invention according to claim 6, in addition to the effect of (d), a serration as one engagement means is formed at the inner end of the operation member, whereas the base end of the blade Since the serration as the other engaging means is formed on the outer peripheral surface of the two, the two are reliably coupled, and as a result, the rotational operation force of the knob portion can be more reliably transmitted to the inner cylinder.
(G) The invention described in claim 7 can obtain the same effect as that of the invention described in claim 4. Further, since the operating means for integrally connecting the knob portion and the rotatable blade is a movable side wall constituting a part of the outer peripheral wall of the knob portion, it is not necessary to provide an operation button separately from the knob portion.
(H) The invention described in claim 8 can obtain the same effect as that of the invention described in claim 4. Also, either the outer peripheral surface of the base end portion of the blade or the inner peripheral surface of the knob portion facing the outer peripheral surface has any of an engaging convex portion, engaging concave portion, friction surface, and serration for preventing the knob portion from rotating. Since it is provided, the rotational operation force of the knob can be transmitted to the inner cylinder without using complicated engaging means such as a movable trigger.
(I) The invention described in claim 9 can obtain the same effect as that of the invention described in claim 1 by a rational configuration (simple configuration).
(J) In the inventions according to the tenth and eleventh aspects, since the knob portion and the blade are reliably coupled, the rotational operation force of the knob portion can be more reliably transmitted to the inner cylinder.
(K) The invention of claim 12 can be used for a cylinder lock for joinery having a dumbler.

1 to 18 are explanatory views showing a first embodiment of the present invention, FIGS. 19 to 22 are explanatory views showing a second embodiment of the present invention, and FIGS. 23 to 25 are third embodiments of the present invention. 26 to FIG. 29 are explanatory diagrams showing a fourth embodiment of the present invention, FIG. 30 to FIG. 33 are explanatory diagrams showing a fifth embodiment of the present invention, and FIG. 34 to FIG. Are explanatory diagrams showing a sixth embodiment of the present invention, and FIGS. 39 to 43 are explanatory diagrams showing a seventh embodiment of the present invention.
Schematic explanatory drawing partially cut away from the front view of the key (key body). FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. The perspective view which looked at the key from the rear-end part side. The perspective view which looked at the key from the front-end | tip part side. The exploded perspective view of a knob part and a blade. Schematic cross-sectional explanatory drawing which shows the state which has lightly picked the approximate center part of the knob | pick part with a finger | toe. Schematic cross-sectional explanatory drawing which shows the state which is picking the substantial center part of the knob | pick part strongly with the finger | toe. Explanatory drawing which shows the front-end | tip part of the lock (lock main body) X. FIG. Explanatory drawing from the front view of lock X. FIG. (A) is a schematic explanatory drawing from the front view which shows the dimensional difference of the width | variety of the front-end | tip insertion opening of a keyhole, and the outer diameter of a braid | blade. (B) is a schematic explanatory drawing which shows the width | variety of the front-end | tip insertion opening of a keyhole, and the magnitude | size of the receiving port of a keyhole main body. Explanatory drawing when a blade is inserted or inserted into a keyhole (cross section is a blade). The schematic cross-section explanatory drawing which shows a keyhole. Explanatory drawing which shows the consistency with the engaging pin by the side of an inner cylinder, and a 4 rotation symmetrical blade. The schematic cross-section explanatory drawing of the axial direction of the lock X. FIG. (A) and (b) are schematic cross-sectional explanatory views in the direction perpendicular to the axis orthogonal to the rotation axis of the inner cylinder, but the cross-sectional positions are different from each other. Explanatory drawing when the front-end | tip part of a braid | blade was guide | induced to the outer expansion guide surface of a keyhole at the time of insertion in a keyhole. The schematic explanatory drawing of the engagement state which inserted the front-end | tip part of the braid | blade of a key completely in the key hole of the inner cylinder. (A) is a schematic sectional explanatory drawing of the coupling state of an inner cylinder and a key. (B) is a schematic cross-sectional explanatory drawing rotated 90 degrees clockwise in the state of (a). The schematic explanatory drawing similar to FIG. 1 of 2nd Embodiment. The exploded perspective view similar to FIG. FIG. 7 is a schematic cross-sectional explanatory view similar to FIG. 6. FIG. 8 is a schematic cross-sectional explanatory view similar to FIG. 7. Explanatory drawing of the principal part (change example of the shape of a knob | pick part) of 3rd Embodiment. Explanatory drawing of the principal part (example of a change of the engagement means of a braid | blade) of 3rd Embodiment. FIG. 8 is a schematic cross-sectional explanatory view similar to FIG. 7. The perspective view of the key of 4th Embodiment. The exploded perspective view of an operation means (operation member, elastic body). Schematic cross-sectional explanatory drawing of the main part (non-pressed state). Schematic cross-sectional explanatory drawing of the main part (pressed state). The perspective view of the key of 5th Embodiment. The exploded perspective view of a key. Schematic cross-sectional explanatory drawing which shows the normal state before inserting a key in a keyhole. FIG. 3 is a schematic cross-sectional explanatory view showing a state where an operation input switch is turned on after the key is inserted into the keyhole and then the knob part itself is strongly picked. The perspective view of the key of 6th Embodiment. Explanatory drawing of the longitudinal cross-section except a part of key. 36 is a sectional view taken along line 36-36 in FIG. (A) is explanatory drawing when a key is inserted in the keyhole. (B) Explanatory drawing when the knob is pressed in the direction of the keyhole The schematic explanatory drawing which the end surface of the base end part of the braid | blade and a part of inner surface of the knob part press-contacted, and both couple | bonded. The perspective view of the key of 7th Embodiment. Explanatory drawing of the longitudinal cross-section of a key. 41 is a sectional view taken along line 41-41 in FIG. (A) is explanatory drawing when a key is inserted in the keyhole. (B) Explanatory drawing when the knob is pressed in the direction of the keyhole The schematic explanatory drawing which a part of the base end part of the braid | blade and a part of inner surface of the knob | pick part engaged, and both couple | bonded.

  1 to 18 are explanatory views of the first embodiment of the present invention. FIG. 1 is a schematic explanatory view in which a front view of a key (hereinafter referred to as “key body Y”) is partially cut away. FIG. 14 shows a cylinder lock for joinery (hereinafter referred to as “lock body X”) as an example of a lock. The cylinder lock of the present invention comprises a combination of the lock body X and the key body Y. When the blade of the key body Y is inserted into the key hole of the inner cylinder of the lock body X, the key code formed on the blade Dumblers located on a cross section perpendicular to the axis of rotation of the inner cylinder of the lock body X coincide (see FIG. 17). The lock body X in FIG. 14 is composed of an outer cylinder 11, an inner cylinder 12, a key hole 13, a movable obstruction 20 and the like, as is the case with ordinary ordinary locks.

  First, the configuration of the knob portion 1 of the key body Y will be briefly described with reference to FIGS. In these drawings, reference numeral 1 denotes a wall having a rear end or a partial opening and an elastic cylindrical knob portion having a front end opening or an elastic cylindrical knob portion having a penetrating support hole 2 (embodiment). The picking portion 1 is made of a material having elasticity, and is formed into a thick plate shape in which the left and right side surfaces 1b and 1b swell outwardly in an arc shape (see FIGS. 2, 3 and the like). Reference numeral 3 denotes a laterally recessed engagement hole formed at a substantially central portion of the rear end of the thick plate-like and cylindrical knob portion 1. The engagement hole 3 communicates with the horizontally long through-hole support hole 2.

  Thus, the laterally recessed engaging hole 3 exhibits a locking function that prevents the base end portion 7a of the blade 7 from coming off from the cylindrical knob portion 1 depending on its form and hole diameter. Therefore, in the embodiment, for example, the diameter of the engagement hole 3 in the lateral direction is larger than that of the through-hole support hole 2 in the lateral direction. On the other hand, in order to fully exhibit the elastic force of the cylindrical knob portion, in the embodiment, the longitudinal section is a slightly elongated elliptical through hole (see FIG. 6). Therefore, the vertical hole diameter of the vertically long elliptical through-hole support hole 2 is larger than that of the disk-shaped engagement hole 3.

  In addition, although the form of the cylindrical knob | pick part 1 of embodiment is shape | molded in the oblong thick plate shape whose outer peripheral surface is substantially square shape, for example, if it picks strongly with a thumb and an index finger, it will resist the elastic force of material itself. As long as the left and right side surfaces 1b and 1b are elastically displaced inward, not only the vertically long rectangular shape of the embodiment, but also a polygon more than a substantially rectangular shape, a substantially abacus ball shape, a substantially spherical shape, etc. Can be molded. Further, a neck portion that is further narrowed toward the substantially circular tip opening 5 formed in the short cylindrical portion 4 at the substantially central portion of the tip portion of the cylindrical knob portion 1 may be formed continuously.

  Next, the configuration of the solid blade 7 of the key body Y will be described. The blade 7 is rotatably supported at the substantially central portion of the knob portion 1 so that the non-polygonal base end portion 7a does not come out, and the outer peripheral surface of the tip end portion 7b continuous with the base end portion 7a is 3. It is formed in a polygonal shape that is more than rotationally symmetric, and has a key code 8 on the outer peripheral surface.

Thus, here, for example, as shown in FIG. 1, a portion fitted or inserted into the through-hole support hole 2 and the laterally recessed engagement hole 3 is referred to as a “base end portion 7a”. A flange 9 is provided at the rear end of the portion 7a so as to play loosely engage with the laterally recessed engagement hole 3 of the knob portion 1.
Here, the rod-like portion protruding from the through-hole support hole 2 is referred to as the “tip portion 7b”. A tip portion 7c is provided. The base end portion 7a is fitted in the cylindrical knob portion 2 at about one third.

  By the way, the key body Y of the present embodiment is formed of a material having an elastic force in the cylindrical knob portion 1 and is formed in a substantially vertically long thick plate body in which the upper and lower surfaces 1c and 1c and the left and right surfaces 1b and 1b are symmetrical (see FIG. 6), the base end portion 7a of the blade 7 is supported by the through-hole support hole 2 and the laterally recessed engagement hole 3, but the left and right side surfaces 1b, 1b of the knob portion 1 as shown in FIG. In the state where the approximate center portion of the knob is lightly picked with the fingers f1 and f2, the blade 7 can rotate while slidingly contacting the inner peripheral surface 1a of the knob portion 1, whereas, for example, as shown in FIG. When the substantially central portion of the knob portion 1 is strongly picked by the fingers f1 and f2, the knob portion 1 is elastically displaced against the elastic force of the material itself, and the inner peripheral surface 1a is the blade. 7 is pressed against the outer peripheral surface of the base end portion 7a, thereby Over de 7 is integrally.

  Accordingly, the key body Y according to the first embodiment of the present invention has a distal end portion 7b of the blade 7 on the outer guide surface 13A of the guide hole 13A of the key hole 13 of the lock body (lock) X as shown in FIG. When the guided tip portion 7c hits and is guided, the blade 7 is in a state where the approximate center portions of the left and right side surfaces 1b and 1b of the knob portion 1 are lightly pinched with fingers f1 and f2. When the tip 7b of the blade 7 completely enters the key hole 13 of the inner cylinder 12, as shown in FIG. 17, for example, it can rotate while slidingly contacting the inner peripheral surface 1a of the knob portion 1. When the substantially central portion of the left and right side surfaces 1b, 1b of the knob portion 1 is strongly picked by the fingers f1, f2, the knob portion 1 is elastically displaced against the elastic force of the material itself, The peripheral surface 1a is in pressure contact with the outer peripheral surface of the base end portion 7a of the blade 7. It allows the knob portion 1 and the blade 7 becomes integral with the rotational operation force of 該摘 see part 1 is transmitted to the blade 7. Therefore, as shown in FIG. 18, the rotational operation force of the knob portion 1 is transmitted to the inner cylinder 12 via the polygonal locking surface of the blade 7 and the corresponding locking surface of the inner cylinder 12. (Lock) X can be applied and unlocked.

  When spread further, many depressions 8 are formed on the polygonal outer peripheral surface of the blade 7 at, for example, a four-fold symmetrical position. The depression 8 is an example of a key code and is simply described for convenience of explanation. Since the key code 8 may be a small or large notch or depression formed on each side surface as long as it has three or more rotational symmetry, the key code 8 of the embodiment has a large opening and a deep recess 8a. And a recess 8b having a small opening and a shallow recess. Further, the blade 7 of the key body Y of the embodiment has an octagonal vertical cross section, and the vertical width K1 and the vertical width K2 are substantially the same (see FIGS. 10 and 11). As described above, the outer peripheral shape of the blade 7 of the key Y of the present invention is formed in a polygonal shape such as a hexagonal shape, an octagonal shape or the like having a rotational symmetry of three or more.

  Next, the lock body X of the present embodiment will be described with reference to FIGS. 14, 15, 16, 17 and the like. In the lock body X of the embodiment, when the blade 7 of the key body Y is completely inserted into the key hole 13 of the inner cylinder 12, the recess or notch as the key code 8 formed in the blade 7 and the rotation axis of the inner cylinder 12 ( For example, the basic structure is the same as that of a conventional lock in that the drum lock 20 located on the cross section perpendicular to the axis orthogonal to the tailpiece O is a cylinder lock.

  However, in the first embodiment of the present invention, the tip 7b of the blade 7 is formed on the inner peripheral wall of the guide hole 13A at the tip of the key hole 13 even if the insertion angle of the blade with respect to the key hole 13 is somewhat rough. After being guided to the enlarged guide surface 13A, the key body Y can be completely inserted to the back of the keyhole 13.

  Accordingly, the width of the outer expansion guide surface 13A gradually decreases from the edge portion a of the tip insertion opening of the keyhole 13 to the edge portion b of the receiving hole of the keyhole body 13B.

  Thus, for example, as shown in FIGS. 8 to 12, the key hole 13 is formed immediately after the guide hole 13a having a slightly screw-shaped outer expanding guide surface 13A on the inner peripheral wall of the tip and the rear end of the guide hole 13a or The key hole main body 13B communicates with a certain distance, and at least the left and right inner and lower inner diameters (widths) W1 and W2 of the edge portion a of the tip insertion port of the key hole 13 are the left and right of the tip 7b of the blade 7 of the key body Y. -It is larger than the upper and lower outer diameters (widths) K1 and K2. Further, the keyhole body 13B for receiving the key code 8 of the blade 7 and the damper 20 at a position where the key code 8 and the damper 20 coincide with each other is provided at either the front end portion or the central portion corresponding to the back of the edge portion a of the front end insertion port. Yes.

  Here, description will be made with reference to FIGS. First, FIG. 9 is a schematic explanatory view from a front view showing a dimensional difference between the outer diameters of the tip end portion (edge portion of the insertion port) a of the key hole 13 and the rod-shaped blade 7 of the key Y. A key hole 13 including a guide hole 13a and a key hole body 13B communicating with the guide hole 13a is formed along the rotation axis of the inner cylinder 12, and in this embodiment, for example, as shown in FIG. Even if the rotation angle is slightly inclined in the left-right direction (meaning that the long wall surface above the portion shown in the cross section is slightly inclined), the outer circumference of the guided portion 7c provided at the tip 7b of the blade 7 Since a sufficient dimensional difference (gap) is set between the surface and the edge portion a of the tip insertion opening of the keyhole 13, the tip 7b of the blade 7 can be freely inserted into the edge of the tip insertion opening of the guide hole 13a. It can be fitted to the part a.

  Next, FIG. 9 and FIG. 11 show the edge part a of the key hole 13 at the front end (insertion opening) and the part near the front end part or the part near the center part in some embodiments, and the edge part b and the rear end part (at the center part). This shows the dimensional difference between the inner diameters (widths) W1 and W2 of the left and right and upper and lower sides of the back part c and the left and right and upper and lower widths (sizes) K1 and K2 of the rod-shaped blade 7 of the key body Y. In the embodiment, the shape of the insertion port a of the key hole 13 is substantially circular (W1 and W2 are the same), but the outer peripheral shape of the rod-shaped blade 7 of the key body Y is that the horizontal width K1 and the vertical width K2 of the vertical section are as follows. It is the same non-regular octagon (see FIG. 9).

  Referring to FIG. 11, the left and right and upper and lower inner diameters (widths) W1 and W2 of the edge portion a of the distal end insertion port of the key hole 13 of the inner cylinder 12 of the lock body X are chamfered on the rod-like blade 7 of the key body Y. The guided distal end portion 7c to the distal end portion 7b are of a size that can be loosely fitted with a margin. On the other hand, the inner diameter (width) of at least the edge portion b of the keyhole body 13B of the keyhole 13 is the same as that of the distal end insertion port. Since the inner diameter (width) W1 and W2 of the edge portion a is smaller, even if the insertion angle with respect to the keyhole 13 is somewhat rough, that is, the insertion angle of the rod-shaped blade 7 with the knob portion 1 of the key Y is moderate. The guided tip portion 7c to tip portion 7b of the rod-shaped blade 7 can be fitted into the edge portion a of the tip (insertion opening) with a margin.

  Therefore, when the tip 7 b of the blade 7 is inserted into the keyhole 13, the knob portion 1 is lightly picked so that the tip 7 b of the blade 7 is aligned with the tip insertion opening of the keyhole 13. When the tip 7b of the blade 7 is fitted into the tip insertion opening of the keyhole 13, the guide surface 13A at the tip of the keyhole 13 is gradually narrowed toward the edge b of the receiving hole of the keyhole body 13B. Since the tip portion 7b of the rod-like blade 7 is controlled (corrected) in sliding contact with the guide surface 13A when it is pushed in while holding the knob portion 1 with an appropriate clamping force, it is tilted. The blade 7 becomes horizontal and smoothly reaches the edge portion b of the receiving hole of the keyhole body 13B.

  Therefore, when the knob portion 1 is further pushed in, the key cord 8 of the blade 7 and the dumbler 20 located on the cross section perpendicular to the axis perpendicular to the rotation axis of the inner cylinder 12 coincide. At this time, the outer peripheral surface of the tip of the blade 7 and the inner peripheral surface of the keyhole 13 are engaged with each other, the center of the blade 7 to the knob portion 1 being coincident with the rotation axis O of the inner cylinder 12.

  After the insertion, when the right and left side surfaces 1b and 1b of the knob part 1 are strongly picked by fingers f1 and f2, the knob part 1 is elastically displaced against the elastic force of the material itself, When the surface 1a is in pressure contact with the outer peripheral surface of the base end portion 7a of the blade 7, the knob portion 1 and the blade 7 are integrated, so that the knob portion 1 can be turned and unlocked while maintaining this state. It ’s fine.

  By the way, although it is a well-known matter, in order to make sure, the configuration of the urging spring 19 and the damper 20 will be described with reference to FIGS. 14 and 17, for example. The dumbler 20 includes an engagement pin 17 and a driver 18. The engagement pin 17 includes a shaft portion 17a having an engagement tip portion slidable in the through-hole 16, and an engagement rod 17b that is connected to the outside of the shaft portion 17a and can contact the driver 18. It consists of. The engagement pin 17 is normally urged inward (in the direction of the keyhole) together with the driver 18 by the resilient force of the urging spring 19, but the engagement rod 17 b is formed at the step portion between the pin hole 15 and the through hole 16. The inward movement is restricted by the contact. Accordingly, the damper 20 is composed of the inner engaging pin 17 and the outer driver 18, and the semicircular arc engaging tip portion of the engaging pin 17 is always a predetermined amount of keyhole by the spring force of the biasing spring 19. 13 protrudes.

  In the embodiment, the pin holes 14 and 15 of the dumbler 20 are arranged in a plurality of lines in a straight line in the axial direction on the upper and lower sides. The main bodies (inner cylinder 12 and outer cylinder 11) X are respectively positioned on a cross section perpendicular to the axis obtained by cutting the main body X in the radial direction. The arcuate engagement tip portions of the upper and lower dampers 20 pass through the approximate center of the recess 8 when the key body Y is inserted into the key hole 13. That is, the axial line passing through the center of the depression 8 of the key body Y as a key is completely coincident with the radial axis of the pin holes 14 and 15 for the dumbler 20 orthogonal to the rotation axis of the inner cylinder 12.

  FIG. 13 is an explanatory view showing the alignment between the engagement pin 17 on the inner cylinder side and a recess as an example of the key code 8 of the four-rotation symmetric bar-shaped blade 7. FIG. 14 is a schematic cross-sectional explanatory view of the lock body X in the axial direction, but for the sake of convenience, all the dumblers 20 are indicated by solid lines. Further, FIGS. 15A and 15B are schematic cross-sectional explanatory views in the direction perpendicular to the axis orthogonal to the rotation axis of the inner cylinder 12, but the cross-sectional positions are different.

  Hereinafter, in the column of this example, the second embodiment, the third embodiment, and the like of the present invention will be described. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same or similar reference numerals, and redundant explanations are omitted.

  First, FIG. 19 thru | or FIG. 22 is each explanatory drawing which shows 2nd Embodiment. The main difference between the second embodiment and the first embodiment is that when the key body Y2 is completely inserted into the keyhole and then the knob portion 1A is strongly picked and turned, the engagement of the knob portion 1A is changed. It is an object of the invention to prevent the inner peripheral surface 11a as a mating surface from sliding on the outer peripheral surface of the base end portion 7a of the blade 7A, and a knob facing the outer peripheral surface of the base end portion 7a of the blade 7A or the outer peripheral surface. One of the inner peripheral surfaces 11a of the portion 1A is that any one of an engaging convex portion, an engaging concave portion, a friction surface, and a serration for preventing the knob partial rotation is provided. As a preferred embodiment, for example, as shown in FIG. 21, the longitudinal section of the base end portion 7a is formed in a gear shape (a large number of convex portions and concave portions), while the knob portion 1A is formed so as to correspond to the gear shape. The inner peripheral surface 1a is serrated (saw shape). Of course, the engaging means of both is a matter that can be arbitrarily changed in design, and although not particularly shown, a large number of protrusions are provided on the outer peripheral surface of the base end 7a, or vice versa (a number of notches are provided). You can also.

  In the embodiment, “serration” is illustrated as an example of the coupling means of both, but of course, the present invention is not limited to this, and the inner peripheral surface of the base end portion of the blade or the knob portion facing the outer peripheral surface is not limited thereto. At least one of the peripheral surfaces can be provided with any of an engagement convex portion, an engagement concave portion, and a friction surface for preventing the knob portion rotation with respect to the base end portion of the blade.

  Next, FIGS. 23 to 25 are explanatory views showing a key body (key) Y3 of the third embodiment. What differs from the third embodiment is the form of the knob portion 1B shown in FIG. 23 and the friction preventing engagement means provided on the outer peripheral surface of the base end portion 7a of the blade 7B shown in FIG.

  The form of the knob portion 1B of the third embodiment is the reverse pattern of the first embodiment, and the substantially central portions of both laterally symmetrical side surfaces are formed in an arc shape on the inside, while the upper and lower symmetrical portions are outside. It is formed in an arc shape in the direction, and as a whole, the substantially central part of the left and right side surfaces 1b, 1b has a track shape with an outward recess.

  As described above, the shape of the outer peripheral surface of the knob portion 1B and the inner peripheral surface of the through-hole support hole 2 are not particularly shown because there is a possibility of elastic deformation, but the shape of the knob portion 1B is an invention. This is a matter that can be appropriately designed such as a track shape, a horseshoe shape, and other polygonal shapes without departing from the above purpose.

  Moreover, when forming an engaging means in the internal peripheral surface 1a of the knob | pick part 1B of 3rd Embodiment, naturally the engaging means of 2nd Embodiment can be applied suitably. For example, a serration is provided as one engaging means on the inner peripheral surface 1a of the knob portion 1B, and a serrated surface that opposes the serration is formed at the base end portion 7a of the blade 7B.

  Next, FIGS. 26 to 29 are explanatory views showing a key body (key) Y4 of the fourth embodiment. The common point of the technical idea between the fourth embodiment and the first embodiment is that the blade 7C is inserted into the key hole 13 on the premise that the key (key body) can be easily inserted into the lock (lock body). Thereafter, the knob portion side is operated to integrate the knob portion 1C and the blade 7C, thereby transmitting the rotational operation force of the knob portion 1C to the inner cylinder 12.

  Whereas the first embodiment utilizes the elastic displacement of the material itself of the knob portion 1, this fourth embodiment uses a single or a pair of operating means 31 (embodiments) provided on the knob portion 1C. The difference is that 1C and the blade 7C are integrated.

  Thus, the key body (key) Y4 of the fourth embodiment forms a pair of penetrating storage portions 30 and 30 at the substantially central portion of the knob portion 1C whose left and right sides are substantially flat. A characteristic feature is that a pair of operation means 31 and 31 are mounted on the shape storage portions 30 and 30, respectively.

  Although description of the detailed matter of the operation means 31 is omitted, the operation means 31 employs, for example, an operation button having a collar. The operation button 31 is always urged outward by a coil spring 32 as an example of an elastic body. In the embodiment, a pair of left and right operation buttons 31 are provided at opposing positions. When the outer end portions of the pair of operation buttons are pushed into the interior so as to be grasped simultaneously, the base end portion 7a of the blade 7C is It is clamped at the inner end.

The outer peripheral surface of the base end portion 7a of the blade 7C is appropriately provided with any of an engagement convex portion, an engagement concave portion, a friction surface, and a serration (embodiment) for preventing rotation.
Therefore, the key body (key) Y4 of the fourth embodiment is such that when the leading end portion 7b of the blade 7C hits the outer expanding guide surface of the lock key hole and is guided, only the knob portion 1C is picked with a finger. When the blade 7C is in a state of being supported, the blade 7C can rotate while being supported by the knob portion 1C. On the other hand, when the tip portion 7b of the blade 7C has completely entered the keyhole 13, the blade portion 1C is rotated. In the state where the outer end portion of the operation member 31 or the plurality of operation members 31 provided on the inner surface of the operation member 31 is pushed against the elastic force of the elastic body 32, the inner end portion of the operation member 31 is the base end portion of the blade 7C. By pressing or engaging the outer peripheral surface of 7a, the knob portion 1C and the blade 7C are integrated, and the rotational operation force of the knob portion 1C is transmitted to the blade 7C.

  Next, FIGS. 30 to 33 are explanatory views showing a key body (key) Y5 of the fifth embodiment. The common point of the technical idea between the fifth embodiment and the first embodiment is that the blade 7D is inserted into the key hole 13 on the premise that the key (key body) Y5 can be easily inserted into the lock (lock body) X. After the insertion, the knob portion 1D is operated to rotate the inner cylinder 12.

  However, the fifth embodiment is mainly different from the first embodiment in that (a) the material of the knob portion 1D is not an elastic body as in the first embodiment, in other words, the material of the knob portion 1D. Is a case formed of, for example, a hard synthetic resin material. (B) The knob portion 1D includes a case main body 35 of the one side opening 36 that supports the base end portion of the blade 7D, and the one side opening 36. (C) The movable side wall 37 includes a vertical operation plate portion 37a serving as an operation input switch, and the operation plate portion 37a. A pair of projecting end plate portions 37b and 37b projecting a required amount in the orthogonal direction from the upper and lower end portions, and a movable plate having a generally U-shaped end surface as a whole, (d) a plurality of elastic bodies in the knob portion 1D Individual biasing means 38 As the biasing means 38, for example, a coil spring is used, and one end portion 38a of the coil spring is appropriately supported on the inner surface of one side wall of the case body 35, while the other end portion 38b is a protruding end plate portion of the movable side wall 37. (E) The movable side wall 37 as an operation input switch is placed in the case main body 35 against the urging force of the plurality of urging means 38. When it enters, the inner surface is pressed against the base end portion of the blade, and the knob portion 1D and the blade 7D are integrated.

  By the way, referring to FIG. 31, the rear wall of the case main body 35 is separable, the hook-like portion 4 having a stopper function of the blade 7D is provided on the base end 7a side, and the base end 7a. Although the point which consists of a short large diameter part and a long small diameter part is shown in figure, these points are not the essential matter of invention. Preferably, in order to prevent the movable side wall from sliding on the inner surface of the movable side wall 37, a thin rubber sheet 40 as an example of an engaging means is attached.

  Therefore, the key body (key) Y5 of the fifth embodiment is a new type of embodiment that applies the respective ideas of the first embodiment and the fourth embodiment, and the knob portion 1D includes a blade 7D. A case main body 35 of the one side opening 36 that supports the base end portion 7a, a movable side wall 37 that fits into the case main body 35 so as to close the one side opening 36, and the movable side wall 37 and the case main body 35. The operating means comprising the single or plural urging means 38 disposed between them and integrally connecting the knob portion 1D and the rotatable blade 7D is the movable side wall 37, as shown in FIG. When the movable side wall 37 is pushed into the inside of the case body 35 against the urging force of the urging means 38, the inner surface of the movable side wall 37 comes into pressure contact with the base end portion 7a of the blade 7C.

  In the above-described configuration, at least one of the outer peripheral surface of the base end portion 7a of the blade 7D and the inner surface of the movable side wall 37 is an engaging convex portion for preventing the knob partial rotation with respect to the base end portion 7a of the blade 7D. It is desirable to provide any one of the engagement recess, the friction surface, and the serration.

  By the way, the knob portion 1D of the fifth embodiment has a box shape as a basic shape. However, the shape is not limited to this, and the knob portion 1D is divided into two substantially at the center, for example, in the vertical direction. In this case, one of the divided left-side knobs is set as a “pick portion 1D”, and the other of the right-side knob pieces is configured as a “movable side wall 37”, thereby operating both knobs 1D and 37. It may be a means. In the case of such an embodiment, when both are pressed in the direction in which they are sandwiched at the same time, the base end portion 7a of the blade 7D can be clamped by the opposing inner surfaces of both knobs 1D, 37.

  Therefore, in the lock key Y5 of the fifth embodiment, the knob portion closes the one-side opening case body (one knob portion) 1D that supports the base end portion 7a of the blade 7D and the one-side opening. Thus, the movable side wall (other knob part) 37 fitted to the case main body and the urging means 38 disposed between the movable side wall 37 and the case main body 1D are rotatable with the knob part. The operation means for integrally connecting the blade is either the case body and the movable side wall, or at least one of the movable side walls against the urging force of the urging means. When pushed into the inner side of the blade, either the inner surface of the case main body and the movable side wall or the inner surface of the movable side wall is in pressure contact with the base end portion of the blade.

  Next, FIGS. 34 to 38 are explanatory views showing a key body (key) Y6 of the sixth embodiment. The sixth embodiment is mainly different from the first embodiment in that (a) the knob portion 1E is formed of a hard material, and (b) the knob portion 1E is not strongly picked, but is picked. Point where the portion 1E is pressed in the direction of the keyhole 13, (c) When the knob portion 1E is pressed in the direction of the keyhole 13, a portion of the inner wall surface of the knob portion 1E is pressed against a portion of the outer peripheral surface of the base end portion 7a of the blade 7E. Alternatively, by engaging, the knob portion 1E and the blade 7E are integrated. In other words, the blade 7E itself or the knob portion 1E serves as a trigger, and the knob portion 1E and the blade 7E are integrated. (D) A point where the urging means 47 for returning the knob part to the initial position is built in the knob part 1E.

  Thus, the engaging means for integrally coupling the knob portion 1E and the blade 7E is at least one of the inner end of the base end portion 7a of the blade 7E or the inner surface of the rear wall facing the inner end of the knob portion. In the embodiment, there are an unnumbered serration formed on the end face of the base end portion 7a of the blade 7E, and an unnumbered serrated engagement with the serration. Of course, the serration is an example, and as in the other embodiments, any of an engaging convex portion, an engaging concave portion, and a friction surface for preventing the knob portion rotation with respect to the base end portion 7a of the blade 7E may be used.

  By the way, although the form of the knob portion 1E can be arbitrarily changed in design, in the embodiment, the short cylindrical portion 4E corresponding to the neck portion is formed longer than the short cylindrical portion 4 of the first embodiment, As shown in FIG. 35, a penetrating small hole 46 for the base end portion is formed inside the knob portion 1E corresponding to the boundary portion between the knob portion (1b, 1c) corresponding to the operation portion and the short cylindrical portion 4E. A partition wall 45 is provided. A coil spring as an example of the urging means 47 is housed in the short cylindrical portion 4E in a state of being wound around the small diameter portion of the base end portion 7a of the blade 7E. Therefore, one end of the coil spring is in pressure contact with one side surface (right side of the drawing) of the partition wall 45, while the other end is in pressure contact with the inner end surface of the large diameter portion of the base end portion 7a of the blade 7E.

  Accordingly, the key body (key) Y6 of the sixth embodiment is of a new type based on a completely different idea from the first embodiment, and has a knob portion 1E and a proximal end portion at a substantially central portion of the knob portion. 7a is supported rotatably so that it does not come off (preferably so as not to move in the direction of coming off from the knob portion by the restricting piece 49 provided on the base end 7a of the blade 7E) and is continuous to the base end. A lock key comprising a blade 7E having a key cord 8 on the outer peripheral surface, the outer peripheral surface of the tip portion 7b being formed in a polygonal shape having three or more rotational symmetry and outside the key hole 13 of the lock X When the tip 7b of the blade 7E hits and is guided by the widening guide surface 13a, the blade 7E is supported by the knob 1E when only the knob 1E is picked with a finger. Times in state On the other hand, when the tip of the blade is completely inserted into the keyhole, the knob portion is pressed against the knob portion in the direction of the keyhole against the biasing force of the biasing means provided in the interior. In the state, a part of the inner wall surface 1a of the knob part 7E presses or engages a part of the outer surface of the base end part 7a of the blade 7E, so that the knob part 1E and the blade 7E are integrated. Thus, the rotational operation force of the knob portion 1E is transmitted to the blade 7E.

  Therefore, (a) in FIG. 37 is an explanatory diagram when the key Y is inserted into the keyhole 13, while (b) is an explanatory diagram when the knob portion 1E of the key Y is pressed in the keyhole direction. While the key Y is pressed in the direction of the keyhole, a hook-like stopper portion 48 provided around the outer end of the large diameter portion of the blade 7E presses against the front surface of the inner cylinder 12, and the base end portion of the blade 7E The rear end having a serration 7a is in pressure contact with an inner surface 1a formed in a laterally recessed shape on the rear wall of the knob portion 1E. FIG. 38 is a schematic explanatory view in which the end surface of the base end portion 7a of the blade 7E and a part of the inner surface of the knob portion 1E are in pressure contact with each other and are joined together. Reference numeral 49 denotes a regulating piece 49 provided at the base end portion 7a of the blade 7E. One side of the regulating piece 49 abuts on the other side (left side of the drawing) of the partition wall 45, and the blade 7E is inadvertently picked. This is for preventing the blade 7E from moving in the direction of detaching from the portion 1E, and also has a function of preventing the blade 7E from coming off.

  Finally, FIGS. 39 to 41 are explanatory views showing a key body (key) Y7 of the seventh embodiment. The seventh embodiment is a design change of the sixth embodiment. Therefore, matters that are mainly different from those in the sixth embodiment will be described, and the same or similar components will be denoted by the same or similar reference numerals, and redundant descriptions will be omitted.

  The seventh embodiment is mainly different from the sixth embodiment in that (a) a place where the urging means 47 is disposed is different, and (b) a mechanism for coupling both the knob portion 1E and the blade 7E. A place where the combining means 51 and the engaging means 51 are provided, (c) a place where the partition wall 45 is formed. (D) Therefore, the biasing means 47 is disposed rearward as shown in the drawing.

  That is, in the seventh embodiment, the knob portion rotation prevention with respect to the base end portion 7a of the blade 1E is provided on either the outer peripheral surface of the base end portion 7a of the blade 7E or the inner peripheral surface of the knob portion facing the outer peripheral surface. A plurality of engaging convex portions 51a and engaging concave portions 51b constituting the engaging means 51 for use are formed at corresponding portions. Note that the engaging means 51 of the seventh embodiment is also provided on either the outer peripheral surface of the base end portion of the blade or the inner peripheral surface of the knob portion facing the outer peripheral surface, as in the other embodiments. It is preferable to provide any one of an engaging convex portion, an engaging concave portion, a friction surface, and a serration for preventing rotation of the knob relative to the base end portion. Further, similarly to the sixth embodiment, a restriction piece 49 is provided on the blade 7E.

  The present invention can be used mainly as a key for a Dar lock of a joinery.

X: Lock (lock body),
Y, Y2 to Y7 ... key (key body),
1, 1A to 1D ... the picking part,
2 ... through support hole,
3 ... engaging hole,
4, 4D ... short cylindrical part,
5 ... Opening the tip,
7, 7A thru 7D ... blade,
7a ... proximal end,
7b ... the tip,
7c: guided tip portion,
8 ... Key code,
9 ... Flange,
11 ... outer cylinder,
12 ... Inner cylinder,
13 ... keyhole,
13A ... guide hole,
13a ... outside expansion guide surface,
a ... the tip of the keyhole 13 (the edge of the insertion slot),
18B ... Keyhole body,
14, 15 ... pin holes,
16 ... through hole,
17 ... engaging pin,
18 ... Driver,
19 ... Biasing spring,
20 ... Mobile handicap,
30 ... Through-shaped storage part,
31 ... operation means,
32 ... an elastic body,
35 ... case body,
36 ... one side opening,
37 ... movable side wall,
38 ... biasing means,
40, 51 ... engaging means,
45 ... partition wall,
47: Energizing means.

Claims (12)

A knob portion formed of a material having elasticity, and an outer periphery of a distal end portion that is rotatably supported at a substantially central portion of the knob portion so that the proximal end portion does not come off, and is continuous with the proximal end portion. A key for a lock formed by a blade having a surface formed in a polygonal shape having three or more rotational symmetry and having a key code on the outer peripheral surface,
When the leading end of the blade hits the outer expanding guide surface of the keyhole of the lock and is guided, the blade is When the tip of the blade is fully inserted into the keyhole, the substantial center portion of the knob portion is strongly pinched with a finger. The knob portion is elastically displaced against the elastic force of the material itself, and the knob portion and the blade are integrated by the inner peripheral surface being pressed against the outer peripheral surface of the base end portion of the blade. A key for a lock, wherein the rotational operation force of the knob is transmitted to the blade. 2. The engagement protrusion for preventing the rotation of the knob portion relative to the base end portion of the blade is provided on at least one of the outer peripheral surface of the base end portion of the blade and the inner peripheral surface of the knob portion facing the outer peripheral surface. A key for a lock comprising any one of a part, an engagement recess, a friction surface, and a serration. In Claim 1, one engagement means is provided in the outer peripheral surface of the base end part of a braid | blade, and the other engagement means is provided in the inner peripheral surface of the knob | pick part facing the said outer peripheral surface. The key for the lock. A knob portion and a substantially central portion of the knob portion are rotatably supported so that the base end portion does not come out, and the outer peripheral surface of the tip portion continuous to the base end portion is a polygonal shape having three or more rotational symmetry And a key for a lock formed by a blade having a key code on the outer peripheral surface, and when the leading end of the blade hits the outer expanding guide surface of the key hole of the lock, and is guided, In the state where only the knob portion is picked with a finger, the blade can be rotated while being supported by the knob portion, while the tip of the blade is completely inserted into the keyhole. When the operation member provided at the knob portion is pushed in against the elastic force of the elastic body, the inner end portion of the operation member is in pressure contact with the outer peripheral surface of the base end portion of the blade. By combining, the knob part The blade is made in one piece, the key for the lock of the rotational operation force of 該摘 viewed portion is characterized in that it transmitted to the blade. 5. The key for a lock according to claim 4, wherein the operation member is an operation button. The serration as one engagement means is formed at the inner end portion of the operation button according to claim 5, whereas the serration as the other engagement means is formed on the outer peripheral surface of the base end portion of the blade. A key for a lock characterized by being formed. 5. The knob according to claim 4, wherein the knob portion includes a case main body having a one-side opening that supports a base end portion of the blade, a movable side wall that is fitted to the case main body so as to close the one side opening, and the movable side wall. The operation means, which is arranged between the case main body and includes urging means and integrally couples the knob portion and the rotatable blade, includes both the case main body and the movable side wall, or at least the movable side wall. When one of the above is pushed into the inside of the case body against the urging force of the urging means, either the inner surface of the case body and the movable side wall or the inner surface of the movable side wall Is a key for a lock, wherein the key is in pressure contact with the proximal end of the blade. 8. The engagement convex portion, the engagement concave portion, and the friction surface for preventing rotation of the knob relative to the base end portion of the blade on at least one of the outer peripheral surface of the base end portion of the blade and the inner surface of the movable side wall. A key for a lock, characterized in that any one of serrations is provided. A knob portion and a substantially central portion of the knob portion are rotatably supported so that the base end portion does not come out, and the outer peripheral surface of the tip portion continuous to the base end portion is a polygonal shape having three or more rotational symmetry And a key for a lock formed by a blade having a key code on the outer peripheral surface, and when the leading end of the blade hits the outer expanding guide surface of the key hole of the lock, and is guided, In the state where only the knob portion is picked with a finger, the blade can be rotated while being supported by the knob portion, while the tip of the blade is completely inserted into the keyhole. When the knob portion is pressed against the knob portion in the direction of the keyhole against the urging force of the urging means of the interior, a part of the inner wall surface of the knob portion is at the base end of the blade. Pressing or engaging a part of the outer surface By the blade and the knob portion are made integrally, the key for the lock of the rotational operation force of 該摘 viewed portion is characterized in that it transmitted to the blade. 10. The engagement protrusion for preventing the knob part rotation with respect to the base end part of the blade, on either the inner end of the base end part of the blade or the inner surface of the rear wall facing the inner end of the knob part. A key for a lock comprising any one of a part, an engagement recess, a friction surface, and a serration. 10. The engagement convex portion for preventing rotation of the knob portion relative to the base end portion of the blade, on either the outer peripheral surface of the base end portion of the blade or the inner peripheral surface of the knob portion facing the outer peripheral surface. A key for a lock having any one of an engagement recess, a friction surface, and a serration. The lock according to any one of claims 1, 4, and 9, wherein the lock is provided so as to be rotatable with respect to the outer cylinder, and has an outer expanding guide surface at the tip of the key hole. A cylinder lock for fittings in which a key code of the blade and a dumbler positioned on a cross-section perpendicular to the axis of rotation of the inner cylinder coincide when the tip of the blade is inserted into the keyhole. A key for a lock.

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