JP6918561B2 - Keys that fit disc tumbler locks for joinery - Google Patents

Description

The present invention relates to a key compatible with a fitting disc tumbler lock .

Patent Document 1 describes "a lock device (key device) composed of a combination of a lock body and a key body (key plate)". Among them, the key body (key plate) shown in FIG. 3 has a "key" by making a group of notches formed on the upper and lower edges of both sides of the key body (key plate) unevenly apart from each other. The purpose is to increase the difference.

However, since each group of notches in Patent Document 1 is notched in the key width direction from the end surface of the side portion of the key body (key plate), it is orthogonal to the bottom surface of the valley constituting the notch, that is, a wide flat surface. The bottom surface of the valley is a straight line (vertical surface) toward the paper surface. Therefore, there are problems to be solved such as it is not possible to increase the number of key differences, the reversible key is easily deformed mechanically, and dust adheres to the bottom of the valley. ..

In FIGS. 8 to 10 of Patent Document 2, a key material is set on a work table, and an induction notch (reversible key) for a tumbler is formed while pressing a disk-shaped rotary blade against a side surface portion of the key material. The technology is described.

Japanese Unexamined Patent Publication No. 59-20316 8 to 10 of JP-A-9-144398.

In view of the problems of Patent Document 1, the main problems of the present invention are "increasing key difference", "maintaining the rigid function of the blade", and "non-adhesion of dust to the notched portion of the blade". Achieve everything.

The key suitable for the disc tumbler lock for fittings of the present invention is an outer cylinder, an inner cylinder that rotatably fits into the outer cylinder, and is incorporated in the inner cylinder in the direction of the central axis. , Multiple movable obstacles that can slide in the radial direction against the spring force of the tumbler spring and have a guided part that is formed on the blade of the master key and engages in response to the large and small tumbler induction notches. When the blade is completely inserted into the keyhole of the inner cylinder, the plurality of movable obstacles are displaced from each other, and the inner cylinder can be rotated. The key is suitable for a fitting disc tumbler lock . The guide notch for the tumbler is one of a first notch of a wedge-shaped recess formed in the blade width direction on one upper surface of the flat surface portion of the blade and one of the flat surface portion of the blade corresponding to a position substantially on the back side of the first notch. It has a second notch of a wedge-shaped recess formed on the lower surface of the side , and the cross-sectional shape of the cut end face in the blade width direction passing through the center of the first and second notches has an inclined ridge. It is characterized by having a substantially chevron shape.

(A) In the invention according to claim 1, since the cross-sectional shape of the cut end face in the key width direction of the guide notch for the tumbler is substantially a chevron shape, the inclined ridge line portion thereof and the guided portion of the movable obstacle of the lock and the slide. Contact. Therefore, for example, the frictional resistance with the movable obstacle can be reduced when the key is inserted and pulled out, so that the operability of the key is good. Further, since the cross-sectional shape of the cut end face in the key width direction of the induction step is almost a mountain shape, dust does not adhere to the inclined ridge line portion and the inclined ridge line portion (substance portion) exists. It has the effect of being tougher than the non-mountain-shaped inductive notches that are linearly cut out from the upper surface on one side to the lower surface on the other side. Further, depending on the embodiment, there is an effect that the key difference increases.
(B) The invention according to claim 2 has an effect that the length of the hypotenuse of the second step of the induction step for the tumbler is different from the length of the hypotenuse of the first step, so that the key difference increases.
(C) The invention according to claim 3 has the same effect as the invention according to claim 1.
(D) In the invention according to claim 4, in the induction step for the tumbler, the length of the hypotenuse of the second step is different from the length of the hypotenuse of the first step, and the length of the hypotenuse of the second step is the first. Two types, which are substantially the same as the length of the hypotenuse in 1-step increments, exist at intervals on the edge of the side surface of the blade, so that the key difference is further increased. In addition, it is possible to increase the number of key differences.
(E) The invention according to claim 5 includes a group formed on the edge of one side surface portion and a group formed on the edge portion of the other side surface portion, and the above-mentioned group. The keyhole of the inner cylinder is characterized in that the position of the apex of the cross-sectional shape of the tumbler guide notch next to each other is different, and the key is reversible and can be used by rotating it 180 degrees. When inserting the blade into, the direction is not limited. In particular , the guided portion of the two-piece movable obstacle incorporated in the inner cylinder of the disc tumbler lock is, for example, in the shape of a "H" or "wedge", and is the number of the wedge-shaped depression of the guide knurl for the key tumbler. Fits keys for disc tumbler locks waiting for 1st and 2nd increments.

1 to 14 are explanatory views for explaining the configuration of the key according to the first embodiment of the present invention. 15 and 16 are explanatory views for explaining the configuration of the key of the second embodiment of the present invention.
The external perspective view which shows an example of the usage mode of a key. The schematic vertical sectional view of the tumbler lock X shown in FIG. A schematic vertical sectional view cut along a plane orthogonal to the insertion direction A of the key Y. Front view of the tumbler lock with the movable obstacle lying down. Front view of the key. Top view of the key. Explanatory view showing a characteristic portion with reference to the location of line 7-7 in FIG. 5 (cross-sectional shape of the cutting end face of the key width direction of the increment induced tumbler). Explanatory view showing a characteristic portion with reference to the location of the line 8--8 of FIG. 5 (cross-sectional shape of the cutting end face of the key width direction of the increment induced tumbler). Explanatory drawing of the structure of the cross-sectional chevron shape. Explanatory drawing in which the key is inserted into the keyhole (keyhole of the inner cylinder). FIG. 7 is an explanatory view showing a sliding contact state between the chevron-shaped induction portion of the cross-sectional portion of the key in FIG. 7 and the guided portion of the movable obstacle divided into two parts. FIG. 8 is an explanatory view showing a sliding contact state between the chevron-shaped induction portion of the cross-sectional portion of the key in FIG. 8 and the guided portion of the movable obstacle divided into two parts. Explanatory drawing to the effect that the inner cylinder rotates relative to each other (including the cross-sectional part of the key of FIG. 7). Explanatory drawing to the effect that the inner cylinder rotates relative to each other (including the cross-sectional part of the key of FIG. 8). Front view of the key of the second embodiment of the present invention Explanatory drawing which shows that the cross-sectional shape of the guide step for a tumbler and the length of the hypotenuse on the front side and the length of the hypotenuse on the back side are the same ( cross-sectional shape of the cut end face of lines 16-16 of 15).

The present invention is not a locking device composed of a combination of a lock body and a key body, but an invention of a "key" characterized by a "key itself". Therefore, the configuration of the key itself will be described in detail. Regarding the configuration of the lock, although one embodiment most suitable for the "key" of the present invention will be described, the "key" of the present invention is preferably a key suitable for a disc tumbler lock for fittings, and is specific. and "outer cylinder body in a cylindrical body inside which is fitted rotatably on the outer cylinder, together are incorporated into the inner cylindrical member, slidable in a radial direction against the spring force of the tumbler spring When the blade is completely inserted into the keyhole of the inner cylinder, the blade is provided with a plurality of two-divided movable obstacles having a guided portion formed on the blade and engaging with a large and small tumbler inductive notch. , The two-divided plurality of movable obstacles are respectively displaced in position, and the inner cylinder can be rotated. This is applied to a disc tumbler lock for fittings.

By the way, the "key" of the present invention achieves all the problems of "increasing the key difference", "maintaining the rigid function of the blade", and "non-adhesion of dust to the notched portion of the blade". .. Then, in order to achieve each of the above tasks, a cross-sectional shape of a plurality of (for example, 6 to 10) cords (in the embodiment, notched tumbler guide notches) formed in the axial direction (insertion direction) of the blade. The distance between adjacent cords, the position of the apex of the cross-section chevron shape in the key width direction of each cord (the depth of cut from the side end face), the cross-section of the cut end face in the key width direction of each cord. The length etc. are devised.

Therefore, typical embodiments of the "key" of the present invention are shown in FIGS. 5 to 9. In these figures, FIG. 5 is a front view of the key, while FIG. 9 shows the main part (blade) thereof. FIG. 9 shows the distance between the cords next to each of the plurality of (for example, 6) cords formed in the axial direction (insertion direction) of the blade B of the key Y, and the positions of the apex of the chevron shape in the cross-sectional angle in the key width direction of each cord. It is a schematic explanatory view showing that the depth of cut from the side end face) and the length of the oblique side of the cross-sectional chevron shape of the cut end face in the key width direction of each cord are different, and further, together with FIGS. 6 to 8, the key Y Indicates that it is reversible and can be used by rotating it 180 degrees.

Here, first, it will be described with reference to FIG. In this figure, on one edge (upper part of the drawing) of both side surface portions 72 orthogonal to the wide flat surface portion 71 of the blade B, a total of six notched guide notches 73 for tumblers having different sizes are provided. It is formed as a group of cords at intervals P1 to P5 that are different in the key insertion direction. On the other hand, on the other edge of the side surface 72 (lower part of the drawing), there are a total of 6 notched tumbler guide notches of different sizes, with intervals P1 to P5 different in the key insertion direction, and another group. It is formed as a code of.
Since FIG. 9 is a partially enlarged view of the front view of the key, here, for convenience of explanation, a group of upper cords (of the upper edge) that can be seen in the front view regardless of the length of the hypotenuse of the tumbler guide notches 73a and 73b. A reference numeral 73b is attached to the guide notch), and a reference numeral 73a is attached to a group of cords (induction notch at the lower edge) that can be seen in the front view to distinguish between the two. This is because the cross-sectional shapes of the tumbler inductive notches 73a and 73b of this embodiment include those in which the length of one hypotenuse and the length of the other are different (see FIGS. 7 and 8).

Next, FIG. 6 is a plan view with respect to the front view of FIG. 5, and FIG. 7 shows that the cross-sectional shape of the cut end face of the tumbler guide notch and the length of the hypotenuse on the front side and the length of the hypotenuse on the back side are different (characteristic portion). explanatory view showing (line 7-7 locations in FIG. 5), indicating that 8 the length and length of the back side of the hypotenuse of the cross-sectional shape and the front side of the hypotenuse of the cut end faces of similarly increments the guiding tumblers and FIG 7 is different It is explanatory drawing (the part of line 8-8 of FIG. 5) which shows (the characteristic part). These figures show one feature of the key Y of the present invention.

As is clear from these figures, the key Y suitable for the disc tumbler lock for fittings of the present invention has a notch-shaped tumbler guide notch formed on the side surface 72 of the blade B, and is used for the notched tumbler. The induction step 73 corresponds to the first step 73a of the wedge-shaped recess formed in the blade width direction (key width direction) on the one-side upper surface 71a of the flat surface portion 71 of the blade B, and the substantially back side position of the first step. a second increment 73b of the recess wedge formed on one side the lower surface 71b of the planar portion 71 of the blade, moreover, the cutting of the edge of the blade width direction passing through the center portion of the first increments 73a and second increments 73b The cross-sectional shape of the end face is a substantially chevron shape (or roof shape) in which an inclined ridge line portion (substance portion) is present.

In the key Y of the first embodiment, for example, as shown in FIGS. 7 and 8, the lengths of both hypotenuses having a substantially chevron shape (or roof shape) differ depending on the cross-sectional portion in the key width direction. For example, in FIG. 7, the length of the longer inclined surface 73a on the opposite side is approximately twice as long as the length of the shorter inclined surface 73b. Further, in FIG. 8, the length of the longer inclined surface 73a on the opposite side is approximately 5 times the length of the shorter inclined surface 73b. In each of these figures, the cross-sectional shape of the cut end face of the edge portion in the blade width direction passing through the central portion of the first notch 73a and the second notch 73b is a substantially chevron shape in which the inclined ridge line portion (substance portion) is present. However, it is shown that the lengths of both oblique sides of the substantially chevron shape are different depending on the cross-sectional portion, and in the embodiment, a total of 6 different chevron cross-sectional shapes are obtained, and the lengths of the apex or the oblique side of each chevron cross-sectional shape are different. By configuring in this way, we are trying to "increase the difference in keys".

In addition, the length of the hypotenuse of the second step 73b of the induction step 73 for the tumbler is shorter (different step) than the length of the hypotenuse of the first step 73a.
However, in the key Y1 of the second embodiment of the present invention, as shown in FIGS. 15 and 16, the length of the hypotenuse of the second step 73b of the induction step 73 for the tumbler is the length of the hypotenuse of the first step 73a. In a preferred embodiment, the hypotenuse length of the second step 73b is shorter than the length of the hypotenuse of the first step 73a in the induction step 73 for the tumbler, since the one having substantially the same (equivalent step) as that of the step 73 is also included. Two types, one with a different step and the length of the hypotenuse of the second step 73b is approximately the same as the length of the hypotenuse of the first step 73a (equivalent step), are uneven on the edge of the side surface of the blade. It exists with an interval or with a predetermined interval (equal interval). The tumbler guide knurl 73 of the optimum embodiment includes a group formed on the edge of one side surface portion and a group formed on the edge portion of the other side surface portion, and The key Y1 (Y) is reversible and can be used by rotating the key Y1 (Y) by 180 degrees.

Next, FIGS. 1 to 4 are explanatory views showing locks suitable for the application of the "key (Y, Y1)" of the present invention, particularly disc tumbler lock X (hereinafter, referred to as "tumbler lock"). be. FIG. 1 is an external perspective view showing a tumbler lock X of the present invention attached to a wall portion 1a of a door 1 and a master key Y together with the tumbler lock X. First, in FIG. 1, X is a tumbler lock, and the tumbler lock X has an inner cylinder 3 formed by combining a plurality of members by the operating force of the master key Y with respect to a long tubular outer cylinder 2. Relative rotation.

In the embodiment, the tumbler lock X is horizontally fixed to the wall portion 1a of the door 1 (for example, the door of a house), and the decorative cover 5 is externally fitted to the lock tip portion 4 constituting the inner cylinder 3. There is.

As shown in FIG. 1, the lock tip portion 4 and the decorative cover 5 having the keyhole (keyhole) 6 project from the outer wall surface of the wall portion 1a. Further, the lock rear end portion 7 constituting the inner cylinder body 3 has a tail piece (output piece) 8 located on the axis 0 of the outer cylinder body 2 or the inner cylinder body 3. The reference numeral A is the insertion direction of the master key Y.

Next, FIG. 2 is a schematic vertical cross-sectional view cut along a plane including the central axis 0 of the tumbler lock X shown in FIG. On the other hand, FIG. 3 is a schematic vertical cross-sectional view cut along a plane orthogonal to the insertion direction A of the master key Y. The basic components of the tumbler lock X will be described with reference to FIGS. 2 and 3.

First, the disc tumbler lock X for fittings of the present invention has two divided left and right or upper and lower movable obstacles Z arranged in two rows with a predetermined interval in the central axis direction of the inner cylinder. Further, the key Y of the disc tumbler lock for fittings of the present invention is the key width direction corresponding to each inclined guided portion provided on each facing surface forming the blade fitting / insertion hole of the two-divided movable obstacle Z. It is characterized in that the cross section of the cut end face of is almost a chevron-shaped guide notch for tumblers.

As described above, reference numeral 2 denotes a long tubular outer cylinder, and a lock cam groove 11 is formed on the inner peripheral surface 2a of the outer cylinder along the generatrix of the outer cylinder 2 (see FIG. 2). ). The pair of lock cam grooves 11 are formed symmetrically along the generatrix of the outer cylinder body and symmetrically in the vertical or horizontal center portions with reference to the central axis 0 of the outer cylinder body 2 or the inner cylinder body 3.

As shown in FIG. 3, the left and right locking bars 12 have an outer cusp 12a that engages with and disengages from each lock cam groove 11 of the outer cylinder 2, and an inner cusp 12a that is integrally formed with the cusp. It is composed of a plywood portion 12b, and is appropriately incorporated in an unlocking notch 13 in the longitudinal direction of the inner cylinder body 3 formed at the outer peripheral end portion of the inner cylinder body 3. Then, as shown in FIG. 2, for example, the front urging spring 14 arranged on the lock tip 4 side (rear) of the inner cylinder 3 and the lock rear end 7 side (front) are arranged. Each locking bar 12 is constantly urged in the direction outside the radius of the inner cylinder 3 by the urging spring 14 on the rear side. Therefore, in the normal state, each locking bar 12 has a plurality of urging springs 14, 14 so that the outer cusps 12a are engaged with the lock cam grooves 11 and 11 of the outer cylinder 2.

Next, the inner cylinder 3 has a lock tip portion 4 having a key hole 6 in the center portion, a lock rear end portion 7 having a tail piece 8 as an output protrusion piece in the center portion, and the lock rear end portion 7 and the above. A plurality of tumbler accommodating portions 27 and a plurality of tumbler spring accommodating portions 28, which are provided between the lock tip portion 4 and are partitioned by a plurality of partition plates (or partition portions) 16 perpendicular to the axial direction. It has a slot for a number partition plate, a pair of plate-shaped guide portions 10 and 10 for a movable obstacle, an unlocking notch 13 in the axial direction, and a plurality of partition plates, etc. The inner cylinder main body 15 formed in a long tubular shape via the inner cylinder main body and the inner cylinder main body are provided in a row along the central axis direction, and are orthogonal to the axis direction, and the tumbler accommodating portion 27 and the tumbler. A plurality of circular or track-shaped partition plates 16 forming a spring accommodating portion 28 and a connecting hole 18 of the partition plate 16 inserted through one end opening 27a of the inner cylinder main body 15 are penetrated through the lock tip portion 4 and the lock tip portion 4 and It is composed of a pair of connecting rods 19 having a predetermined length erected on the rear end portion 7 of the lock. The specific configuration of the inner cylinder 3 is not a specific requirement of the present invention, and is therefore omitted.

In FIG. 2, reference numeral 26 is an annular protective plate, and the protective plate 26 is appropriately hardened, and at the center thereof, an unnumbered central hole corresponding to the key hole 6 and a central portion thereof. The above-mentioned unnumbered insertion holes for the guide rod and the like are appropriately formed in the near portion.

Here, FIG. 3 showing the initial position will be described. Based on FIG. 3, the inner cylinder body 15 has a wide end on the opening side of the upper outer circumference, except for the left and right stepped body portions 15a and 15a shown by hatching, while the lower outer circumference is open or non-open. The other end is narrow, with reference to the upper and lower plate-shaped guides 10 and 10 for the movable obstacle located on the vertical line V passing through the central axis O of the inner cylinder 3 (inner cylinder main body 15). Then, it has a pair of left and right tumbler accommodating portions 27, 27.
A pair of left and right movable obstacles Z are appropriately incorporated into these tumbler accommodating portions 27 from one end opening 27a. As shown in FIG. 2, the seven movable obstacles Z (the total number of the divided movable obstacles Z is 14) are arranged in a row in the central axis O direction via a plurality of track-shaped or circular partition plates 16. It is arranged in.

13 is a pair of unlocking notches formed symmetrically on the upper and lower portions or the left and right portions of the inner cylinder main body 15, and these unlocking notches 13 are the central portions of the above-mentioned upper and lower or left and right body portions 15a and 15a. The tip portions 12a of the pair of locking bars 12 are fitted and guided, respectively. Reference numeral 28 denotes a pair of left and right tumbler spring accommodating portions having spring end support surfaces formed at appropriate locations (in FIG. 3, stepped lower end portions of the left and right body portions 15a and 15a) in the tumbler accommodating portion 27, and these tumblers. A pair of spring accommodating portions 28 are provided vertically or horizontally facing the inside of the left and right stepped body portions 15a and 15a.

Next, the configuration on the rear end 7 side of the lock will be described with reference to FIG. As described above, the rear end portion 7 of the lock has the tail piece 8, and the tail piece 8 has a stopper 31 such as a washer ring 31a and a stopper ring 31b provided at the rear end portion of the outer cylinder body 2. It is attached to the central portion of the tail plug 32 that is rotatably fitted in the rear end portion of the outer cylinder body 2 via the inner cylinder body 2.

The tail plug 32 constituting the lock rear end portion 7 has a pair of rear support holes 33 for supporting the rear end portion of the connecting rod 19 as in the lock tip portion 4. The connecting rod 19 penetrates the movable obstacle Z and the partition plate 16 which will be described later and are incorporated in the inner cylinder main body 15, and the tip portion thereof is in the front support hole 25, while the rear end portion is in the rear support hole 33. It is supported.

Next, the configuration of the movable obstacle Z divided into two will be described with reference to FIG. Since the configuration of the other movable obstacle Z in the upper part of the drawing is the same as that of the other movable obstacle Z in the lower part of the drawing, the same reference numerals are given and duplicate description is omitted. FIG. 4 is a front view (or a rear view) of the movable obstacle Z in a horizontal state.

Based on FIG. 4, the right end portion (here, “one end portion 41a”) formed in a large arc shape on the right side is formed corresponding to the curvature of the inner peripheral surface 2a of the outer cylinder body 2. Therefore, in the state of being urged by the tumbler spring 42 (locked state), for example, the outer cylinder 2 is pressed against the inner peripheral surface 2a. The protruding left end having a small arc-shaped end face on the left side (here, referred to as "protruding other end 41b") is located in the storage portion 30 between the tumbler spring accommodating portion 27 and the lower plate-shaped guide portion 10. do. The other inclined guided portion b is formed on the inner end side (upper end portion in the drawing) 41c of the protruding other end portion 41b. Although it does not appear in FIG. 4, one inclined guided portion a is formed on the back side (back surface) of the other guided portion b. Then, a receiving recess 48 for the engaging plate portion 12b of the single or a plurality of locking bars 12 is formed on the outer end portion (lower end portion on the drawing) 41d with respect to the inner end portion side (upper end portion on the drawing) 41c. There is. The laterally tilted recess at the left end is a spring support end 49 that supports the end for the tumbler spring 42. Further, reference numeral 46 denotes a through hole for the connecting rod 19, and the through hole 46 for the connecting rod 19 has an elongated rectangular shape because the movable obstacle Z slides to the left side on the drawing against the spring force of the tumbler spring 42. Is formed in.

Next, returning to FIGS. 5 to 9, the configuration of the master key Y of the present invention will be supplementarily described. In these figures, Y is the master key, B is the blade (insertion portion), 71 is the flat surface portion, 71a is the upper surface on one side of the flat surface portion, 71b is the lower surface on one side of the flat surface portion, 72 is the side surface portion, and 72a is one side. 72b is the other side.

The key Y as the master key of this embodiment is rotatably fitted to the outer cylinder 2 having the lock cam groove 11 on the inner peripheral surface along the bus, and along the central axis O. An inner cylinder 3 having a formed key hole 6 and an unlocking notch 13 in the radial direction, and a locking extending along the bus of the inner cylinder and urged in a direction to engage with the lock cam groove 11. It is located between the bar 12 and each partition 16 of the inner cylinder 3, is slidable in the radial direction against the spring force of the tumbler spring 42, and is formed on the blade B of the key Y to be large or small. A key for a cylinder lock having a plurality of movable obstacles Z having a guided portion to be engaged corresponding to the tumbler induction notch 73, and the movable obstacle Z is divided into two in a facing state. The guided portion (a, b) formed in an inclined shape is provided on a part of each facing surface on the inner end side thereof, while the induction notch 73 for the tumbler of Y of the master key is the blade. The first notch 73a of a wedge-shaped recess formed in the blade width direction (key width direction) from the side surface portion 72 on the one-side upper surface 71a of the flat surface portion 71 of B, and the plane corresponding to substantially the back side position of the first notch 73a. It is a second notch 73b of a wedge-shaped recess formed in the lower surface 71b on one side of the portion 71, and when the blade B of the master key Y is inserted into the key hole 6, the movable obstacle Z divided into two is each the tumbler spring. The guided portions a and b of the movable obstacle Z engage with the tumbler guide notch 73 of the master key while being guided in the same direction by the pair of connecting rods 19 against the spring force of the 42. The unlocking receiving recess 48 on the outer end side of the movable obstacle Z divided into two coincides with the engaging plate portion 12b on the inner end side of the locking bar 12, and thus the key Y When the inner cylinder 3 is rotated in the unlocking direction, the inner cylinder 3 rotates relative to the outer cylinder 2 due to the wedge action generated between the lock cam groove 11 and the locking bar 12. (See FIGS. 13 and 14).

FIG. 7 is an explanation showing the cross-sectional shape of the cut end face of the tumbler guide notch 73 at the portion 7-7 in FIG. 5 and the difference between the length of the hypotenuse on the front side and the length of the hypotenuse on the back side (feature portion). It is a figure. As shown in FIG. 5, for example, as shown in FIG. 5, the tumbler guide knurls 73 of the embodiment have large and small guide knurls having different depths in the blade insertion directions on both side surfaces 72a and 72b, which are side surface portions 72 of the blade (insertion portion) B. 73 are formed respectively, but when the master key Y is turned upside down in the state of FIG. 5, large and small induction notches having different depths in the insertion direction of the blade B are also formed on both side surfaces 72a and 72b, which are the side surface portions 72. 73 are formed respectively.

Therefore, as shown in FIG. 7, the cross-sectional shape of the tumbler guide notch 73 is substantially mountain-shaped, and the ridges (portions visible to the cutting edge) P and P of the upper and lower mountain-shaped guide notches 73 are of the inner cylinder 2. It deviates from the vertical line V passing through the central axis O in a rotationally symmetric state. Therefore, the length L2 of the hypotenuse of the second step 73b of the induction step 73 for the tumbler is shorter than the length L1 of the hypotenuse of the first step 73a.

By the way, the large and small guide notches 73 having different depths are formed on the front and back sides in the insertion direction of the blade B in total of about 5 to 7 corresponding to the arrangement position of the movable obstacle Z. It is desirable that the number of induction steps 73 for the tumbler corresponds to that of the movable obstacle Z. A long groove 74 is formed in a linear portion along the blade insertion direction in a rotationally symmetrical manner in the central portion of the Y blade B of the master key in a plan view.

The locks to which the keys Y and Y1 of the present invention can be applied are of the type in which the tumbler moves linearly, for example, JP-A-62-194374, Jitsugyo 6-28616, and JP-A-2000-96888. It can be applied not only to Japanese publications, but also to those using the pendulum principle described in, for example, Japanese Patent Application Laid-Open No. 55-1288848, Japanese Patent Application Laid-Open No. 9-144398, etc. (lever type tumbler lock).

The present invention can be used in the fields of locks and fittings.

X ... tumbler lock,
Z ... Two-part movable obstacle,
a, b ... Induced part,
Y, Y1 ... Master key,
B ... blade,
P1 to P5 ... Interval (pitch),
P ... Position of the apex of the cross-sectional shape of the cut end face,
71 ... Flat surface,
72 ... Side part,
73 ... Induction knurling for tumblers,
73a ... 1st step,
L1 ... The length of the hypotenuse in the first step,
73b ... 2nd step,
L2 ... The length of the hypotenuse in the second step,
74 ... Straight long groove,
1 ... Door,
2 ... Outer cylinder,
3 ... Inner cylinder,
11 ... Lock cam groove,
12 ... Rocking bar.

Claims (5)

An outer cylinder, an inner cylinder that rotatably fits into the outer cylinder, and an inner cylinder that is incorporated in the inner cylinder in the direction of the central axis and slides in the radial direction against the spring force of the tumbler spring. When it is provided with a plurality of movable obstacles that are flexible and have a guided portion that is formed on the blade of the master key and has an engaging portion corresponding to a large and small tumbler guide notch, and the blade is completely inserted into the keyhole of the inner cylinder. A key suitable for a disc tumbler lock for fittings, in which the plurality of movable obstacles can be displaced and the inner cylinder can be rotated .
The guide notch for the tumbler is one of a first notch of a wedge-shaped recess formed in the blade width direction on one upper surface of the flat surface portion of the blade and one of the flat surface portion of the blade corresponding to a position substantially on the back side of the first notch. It has a second notch of a wedge-shaped recess formed on the lower surface of the side , and the cross-sectional shape of the cut end surface in the blade width direction passing through the center of the first and second notches has an inclined ridgeline portion. A key that fits the approximately chevron-shaped disc tumbler lock for joinery . In the key suitable for the fitting disc tumbler lock of claim 1, the length of the second step of the tumbler induction step is different from the length of the first step of the fitting disc. A key that fits a tumbler lock . In conforming key fitting for disc tumbler lock according to claim 1, joinery, wherein the length of the second increment of hypotenuse increments guiding tumbler is the length substantially equal to the first increment of the hypotenuse A key that fits a disc tumbler lock . In the key suitable for the disc tumbler lock for fittings of claim 1, the length of the hypotenuse for the tumbler is different from the length of the hypotenuse of the first step, and the hypotenuse of the second step is different. A key that fits a disc tumbler lock for joinery , characterized in that two types, the length of which is approximately the same as the length of the hypotenuse of the first step, are present at intervals on the edge of the side surface of the blade. In any of the keys compatible with the fitting disc tumbler locks of claims 1 to 4, the tumbler induction knurls are a group formed on the edge of one side surface and the other side surface. There is a group of tumbler locks formed on the edge of the tumbler lock, and the tumbler locks next to each other have different apex positions, and the key is rotated 180 degrees before use. A key that fits into a fitting disc tumbler lock, which is characterized by being reversible.

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