Button lock

Abstract: In a push button combination lock (1), the lock combination can be set by rotating 180° the desired push button bodies (54). Each push button (10) has a notch (56) in one end of a button body (54) for optionally selecting the set or non-set condition; a lock flange is formed for realizing a locked condition when depressed; upper and lower fan-shaped stopper flanges (60) and (60') are formed on the lower portion of the lock flange with different phases in a 180 º peripheral direction; a shank (55') having a square cross section is integrally formed for sliding relative to a slide notch (37) of a key plate (40); a lever handle (7'') can be fixed with a screw (85') relative to a rotation shaft (77) optionally for the right-handed or left-handed operation; and the lever handle (7'') cannot be easily extracted.

Description: Field of the Invention The disclosed technique relates to a technical field of a structure of a key-less type button lock in which a house door or another door can be locked or unlocked by operating a button. Description of the Prior Art As is known, there are various fastening/unfastening locks for use in a building door or the like, but most locks are so-called deadlocks of cylinder lock types operated by keys. To lock/unlock a warehouse door or the ,like whose appearance design is not made much of, a so-called number lock is simply used, but usually as a general embedded type of deadlock, a key-operated system is overwhelmingly frequently used not only for housing but also for business purposes. In the key-operated system of the deadlock or another lock, however, a predetermined combination of a lock and a key including a master key is adapted to function literally as a unity. Therefore, once the key is lost, an intrinsic function is disadvantageously lost. Furthermore, statistics show that there are remarkably many cases in which locking/unlocking is impossible because the key is forgotten to be operated. These disadvantages are also undesirable for crime prevention. Of course, it is possible in principle to attach a so-called dial lock for use in a safe to a door or the like. It is nearly disadvantageous or impossible to actually attach the dial lock to the usual door for reason of structural limitations of both the lock and the door, designing conditions, design problems and the like. To solve the problem, for example, as described in the applicant's prior invention, i.e., Japanese Patent Application Laid-open No. 71968/1982 (Japanese Patent Publication No. 54951/1987), Japanese Patent Application Laid-open No. 66055/1994 and the like and as shown in Figs. 21 and 22, a so-called tumbler pushing type of button lock 1 is proposed and practically used in which the lock is fixed to a door surface or the like and a predetermined number of button bodies are pushed in accordance with a keyword indicating a predetermined locking/unlocking combination to operate a cylinder lock and accordingly advance/retreat a dead bolt for locking/unlocking. The button lock 1 comprises a case frame 2 mounted on an outer surface of a door (not shown), a backing plate 4 provided via bridge pipes 3 relative to the case frame 2 on an underside of the door and a known deadlock 6 having a dead bolt 5. Moreover, the deadlock 6 is lockably/unlockably interconnected to a square mandrel 8 which is interposed between a handle 7 of the case frame 2 and a handle 7' of the backing plate 4 for fastening/unfastening the deadlock 6. A button body, i.e., a plate tumbler 11 shown in Fig. 22 is engaged with each of a set number of cover buttons 10 attached to a cover plate 9 provided on the case frame 2 in a predetermined manner. A middle portion of each tumbler is notched to form a slit notch 12 which can be set in a locked or unlocked condition by means of a key plate (not shown), and upper and lower end portions thereof form hook notches 13 for engaging with a lock spring provided on a reset plate (not shown) to set the tumbler 11 in a pushed condition. Therefore, in the button lock 1, as desired, an operator can selectively set the number indicated on the cover plate 9 in such a manner the arrangement of the buttons is stored in accordance with the designation of a keyword. When the tumbler 11 is initially attached to the door, the tumbler 11 is set in a stored condition (erected condition) or in the stored condition the tumbler needs to be selectively set in a non-stored (inverted) condition. If the arrangement of the buttons in the stored condition has to be changed unexpectedly for a certain reason, by detaching the case frame 2 from the door and separating a mechanical portion, the erected or inverted condition of the tumbler 11 needs to be selectively changed. The operation of switching the erected/inverted condition of the tumbler 11 is thus very laborious. When the erected/inverted condition is frequently changed, the tumbler 11 is disadvantageously deformed to lose its function. To solve the problem, as described in the same applicant's prior invention, i.e., Japanese Patent Application Laid-open No. 80074/1983 and as shown in Fig. 23, a button lock having a rotary button is developed as an improvement invention so that the market is sufficiently satisfied. In the button lock having the rotary button, as shown in Fig. 23, a button body has a cylindrical head 74, slide notches 13' different from each other in peripheral direction phase by 90° are formed on the lower portion of the head, a flat surface 15 is formed between the upper and lower slide notches 13' formed with the peripheral direction phase difference of 90°, the thickness between the slide notches 13' is determined by relatively sliding a slide notch 17 formed in a key plate 16 and the lengths of the button slide notches 13' are set longer than the width of the slide notch 17. Therefore, in the attitude shown in Fig. 23, the key plate 16 cannot be slid relative to the button to realize a locked condition. On the other hand, when the button is rotated 90° via a minus notch 19 formed in a tip end of a shank of the button body and pushed in via a cover button 10, then the upper slide notch 13' is engaged in the slide notch 17 of the key plate 16. Therefore, the key plate 16 can be slid relative to the button. Thereby, the handle 7 can be turned right or left (directions R or L) to operate the deadlock 6 via the square mandrel 8 and relatively move the dead bolt 5 for locking/unlocking. Therefore, as shown in Fig. 23, when the lower slide notch 13' of the button is opposed to the slide notch 17 of the key plate 16 and the slide notch 17 interferes with a shoulder portion 20, a non-stored condition is set in which the key plate 16 is not slid. On the other hand, by turning the button 90° via the minus notch 19 in the tip end of the shank, thus pushing the button against a spring 21 and engaging a hook spring 24 in a lower reset plate slide notch 23 in an annular notch 25 formed in an upper portion of the minus notch 19 of the shank, then a stored condition is maintained. In the stored condition, since the upper slide notch 13' is engaged with the slide notch 17 of the key plate 16, the key plate 16 can be slid and the handle 7 can be rotated to unlock the deadlock 6 via the square mandrel 8, so that the dead bolt 5 can be retreated. In Fig. 23, numeral 26 denotes a presser plate of the key plate 16, 27 denotes a back plate of the pressure plate 26, 28 denotes a snap washer pressed against the key plate 16 via the presser plate 26 and the back plate 27, 29 denotes a back plate, 30 denotes a backing plate and 31 denotes elastic springs for applying return forces. In a button lock according to Japanese Patent Application Laid-open No. 80074/1983 the locked/unlocked condition of a key plate (28) may be set by turning a button body (20) by 90°. In the unlocked condition the key plate (28) is permitted to slide relatively to the button body(ies) by means of an engagement between a slide notch (31) of said key plate (28) and a slide notch (25) of said button body(ies) (20). In the locked condition the sliding movement of the key plate (28) is inhibited by abutting of a shoulder portion (32) of the key plate (28) on the slide notch (25) of the button body (20) being turned by 90°. Due to a high-frequent use and friction between the slide notch (31) of the key plate (28) and the slide notch (25) of the button body (20) this shoulder portion (32) is subjected an abrasive wear. This results in that a stored or non-stored condition cannot be realized securely. Furthermore, due to the rectangular shape of the slide notches, assembly and maintenance of the button lock are very laborious. Document US 4 748 833 shows a button lock comprising a key plate and a plurality of plate-shaped keys which keys enable or disable a sliding movement of said key plate. In this button lock the stored or non-stored condition may be set by turning the attitude of the keys in said button lock. By this a positional relationship between the respective key and the key plate may be changed. Further, document EP 0 785 322 A shows a button lock comprising a slider plate 21, a plurality of unlocking tumblers 15A and a plurality of non-unlocking tumblers 15B. Said slider plate 21 is permitted to move from the unlocked to the locked condition of the button lock, and vice a versa, only when said unlocking tumblers 15A are depressed and said non-unlocking tumblers 15B are not depressed. Furthermore, document FR 2 530 717 discloses a button lock comprising a slider plate 9 urged by a spring 10 and a plurality of rotors 5. Said rotors 5 may be positioned in a locked condition or an unlocked condition via buttons 2. Finally, document EP 0 380 869 A discloses a door locking arrangement comprising a drive member 55, a latch actuating member 57 and a permutation lock reset member 49. Said drive member 55 is operatively connected to a door knob or a lever handle. Said latch actuating member 57 is able to actuate a dead bolt of the door locking arrangement while being operated by said drive member 55, when a correct combination has been inserted into the permutation lock. When an incorrect combination has been inserted, said drive member 55 drives the permutation lock reset member 49, to reset the permutation lock. Summary of the Invention Therefore, in the button lock having the rotary button shown in Fig. 22, the locked condition of the key plate 16 relative to the button is set by the shoulder portion 20 of the slide notch 17. In the key plate 16 of zinc, when the shoulder portion 20 abuts on the slide notches 13' with a high frequency, causing friction, then the locked condition cannot be secured. When the locked or unlocked condition is realized by turning the button 90° via the minus notch 19 in the tip end of the shank, a limitation angle is 90°. Since the shoulder portions of the upper and lower slide notches 13' are badly worn, problem is that the stored or non-stored condition cannot be realized securely. Therefore, in the button lock shown in Figs. 22 and 23, facility for use on the right or left side needs to be considered relative to the door. For this, as shown in Fig. 24, a right-handed operation pin 48 or a left-handed operation pin 48' which abuts on the key plate 16 of a rotary cam 47' cooperating with the handle 7 to slide the key plate 16 is selectively pushed in and engaged for use. The attachment of the button lock to the dead bolt 5 for right-handed or left-handed operation or another work is relatively laborious. Moreover, the maintenance or management of components of the operation pins 48 and 48' is disadvantageously intricate. Furthermore, in the prior art, since the handle 7 is fixed on the outer case frame 2 of the door just with a bolt, the handle 7 is taken away by removing the bolt through rubbery or another intentional mischievous action. Such mischief frequently occurs, and the button lock cannot complete its intrinsic function. The object of the invention is to provide a button lock having an improved operation, assembly and maintenance. This object is achieved by a button lock according to the invention comprising button bodies with a non-rectangular shape. By turning the button bodies by 180° (instead of 90° in the prior art) in order to set the stored or non-stored condition, the freedom in designing the button bodies and the associated slide notch of the key plate is enhanced such that an abrasive wear of the abutting portions does not affect the operation of the button lock. For example, the shown embodiment employs button bodies having fan-shaped stopper flanges (60, 60') and a key plate (40) having a hook notch. When an abrasive wear occurs, this results only in that the key plate may slide further, but it does not affect the secure operation of the button lock. Brief Description of the Drawings [Fig. 1] It is a perspective view schematically showing an entire embodiment of the present invention. [Fig. 2] It is an exploded perspective view partly showing a laminated condition of mechanical portions in a case frame on the side of a door surface. [Fig. 3] It is a view showing the appearance of a clear button: (a) is a top view thereof; (b) is a perspective view thereof; (c) is a bottom view thereof; (d) is a side view thereof; and (e) is a rear view thereof. [Fig. 4] It is a view showing the appearance of a button body: (f) is a top view thereof; (g) is a plan view thereof; (h) is a bottom view thereof; (i) is a side view seen from one direction; and (j) is another side view seen from the other direction. [Fig. 5] It is a view showing the appearance of a button: (k) is an exploded perspective view of a cover button and the button body; and (1) is an exploded perspective view of the cover button and the clear button. [Fig. 6] It is a sectional view showing an action of the clear button relative to a reset plate. [Fig. 7] It is a sectional view showing a stored or non-stored condition of the button body relative to a key plate. [Fig. 8] It is a functional view of a stopper flange of the button body and a slide notch of the key plate: (m) is a plan view showing a non pushed-in condition of the button body in the stored condition; (n) is a bottom view showing the pushed-in condition; (o) is a functional view of the button body and the slide notch of the key plate in the non-stored condition; and (p) is a bottom view showing an engaged condition. [Fig. 9] It is a lock function view of the button body: (q) is a perspective view of a hook notch of the key plate and a hook notch of a button presser plate to be engaged with each other; (r) is a perspective view of the hook notches and two stopper flanges of the button body in the non pushed-in condition; and (s) is a perspective view showing the engagement in the pushed-in condition. [Fig. 10] It is a surface view of a cover plate. [Fig. 11] It is a rear view of the same. [Fig. 12] It is a surface view of the button presser plate. [Fig. 13] It is a rear view of the same. [Fig. 14] It is a surface view of the key plate. [Fig. 15] It is an enlarged front view of the slide notch in the key plate. [Fig. 16] It is a plan view of the reset plate. [Fig. 17] It is a vertically sectional view of a center of the reset plate. [Fig. 18] It is a plan view of a reset plate presser plate. [Fig. 19] It is a partial view of an outer lever handle: (t) is an exploded perspective view thereof; and (u) is a perspective view schematically showing a rotation shaft thereof. [Fig. 20] It is a perspective view showing engagement of an inner lever handle. [Fig. 21] It is an exploded perspective view of a prior-art button lock. [Fig. 22] It is a perspective view of a tumbler as a button body. [Fig. 23] It is an exploded perspective view showing a prior-art button lock. [Fig. 24] It is a plan view of a right-handed or left-handed operation switching mechanism. [Description of Numerals] 2' case frame 9' cover plate 10' cover button 54 button body 5 dead bolt 40 key plate 7" lever handle 8' square mandrel 6 deadlock 1' button lock 37 slide notch 60, 60' stopper flange 56 minus notch 43 reset plate 47 rotary cam 85' fixing screw 48 clear button 71, 71' protrusion 36 button presser plate 66' lock spring 42' cam face 64 (elastic) spring 81 handle fixing washer 72 base 85 screw bolt 63 button stopper washer 64 spring 81 snap washer 69, 69' lock notch Detailed Description of the Prefferred Embodiment A mode for practicing the present invention will be described as one embodiment based on Figs. 1 to 20. Additionally, the same portions as in the mode shown in and after Fig. 21 will be described with the same numerals. A shown embodiment is mounted on a door which is rotated or opened in double-hinged manner. In the embodiment, numeral 1' denotes a button lock in a scope of the present invention in which the dead bolt 5 of the deadlock 6 embedded in a predetermined position of the double-hinged type door (not shown) is advanced or retreated to form a fastening/unfastening lock in the same manner as the conventional mode shown in Fig. 21. As shown in Fig. 21, the button lock comprises a case frame 2' of a mechanical portion mounted on the outer surface of the door and a sub backing plate 4' interconnected via bridge pipes 3 to the case frame 2' of the mechanical portion on the underside of the door. A lever handle 7" as a handle for locking or unlocking the deadlock 6 on the surface case frame 2' and a lever handle 7"' opposite to the lever handle 7" in the rear sub packing plate 4' are provided via a square mandrel 8' which is passed through the deadlock 6. As shown in Fig. 2, in the case frame 2' forming the mechanical portion mounted on the surface of the door, on the side of the lever handle 7", provided is a cover plate 9' having holes 33' in which cover buttons 10' are set and on which numerals from 1 to 0 and characters A, B are indicated. Following the cover plate 9', as shown in Fig. 12, provided is a presser plate 36 which has twelve button holes 34 for passing the button bodies and a button hole 35 in the top for passing a clear button. Furthermore, above the presser plate in the figure a key plate 40 is laminated in which twelve slit notches 37 as button holes described later are formed to be aligned with the button holes 34, flanges 38 for receiving return springs as described later are formed in both sides of the top and a clear button hole 39 to be aligned with the button hole 35 is formed between the receiving flanges 38. Furthermore, above the key plate 40, a reset plate 43 is laminated in which a reset presser plate (not shown) is fixedly overlapped, twelve slit notches 41 are formed to be aligned with the button holes 37 and button bodies 54 are passed through. The reset plate is slid by a predetermined span, and the button bodies 54 described later are passed through the slit notches 34, 37 and 41. In the case frame 2' a back plate 46 is further fixed with screws (not shown) and the like in a laminated condition, in which character C is indicated beside a clear button hole 45 and numerals 1 to 0 and characters A and B are indicated beside button-body holes 44 to clearly show a keyword. The sub backing plate 4' is integrally connected via the bridge pipe 3 to back plate 46 on the underside of the door. Additionally, notches 32 and 32' are formed toward ends of the lever handle 7" of the case frame 2' and the lever handle 7"' of the sub backing plate 4' for passing through a master key for use when unexpected trouble occurs. Each of mechanical portions set in plural layers in the case frame 2' will be described in detail. First, a clear button 48 is shown in Fig. 3, in which the cover button 10' is on the underside, a shank 49 having a predetermined size and a short cylindrical cross section with a predetermined diameter is formed on the side of the sub backing plate 4', a flat surface 51 is formed on an inferior arc below the shank 49, and a cam flange 52 having a face tapered toward the cover button 10' is formed on a superior arc. A sub flange 53 formed on the under surface of the cam flange 52 is wider than the shank 49 having a circular cross section and have flat surfaces 51' on both sides thereof, a shank 49' with a predetermined length extended from the sub flange 53 have flat surfaces 50 formed on both sides thereof, and the flat surface 51' of the shank 49' and the flat surface 51' of the sub flange 53 are formed on the same plane as shown in Figs. 3(b) and (d). Additionally, the flat surface 51 on the inferior arc of the cam flange 52 is formed with a slight step from the flat surfaces 51' of the shank and the sub flange 53, and the configuration shown in Figs. 3(a) to (e) is provided to reduce interference for smooth sliding of the reset plate 43 by the predetermined span and to allow an empty lock to operate. Therefore, as shown in Fig. 17, the tapered face of the cam flange 52 performs a cam action on a cam face 42' formed on a square cam frame 42 of the reset plate 43, and slides by a predetermined span with the reset plate 43. Each of the bar-shaped button bodies 54 is shown in Fig. 4, and also in Fig. 4 a shank 55' to be engaged with the cover button 10 is shown on the underside and a shank 55 to be engaged with the sub backing plate 4' is shown on the upper side. The top of the shank 55 having a cylindrical cross section to be opposed to the button hole 44 in the body presser plate 46 is provided with a minus notch 56 formed or slotted for rotating the button body 54 into the stored or non-stored condition to set the keyword. An annular and tapered stopper flange 57 expanded toward the cover button 10 is integrally formed on the lower portion of the shank 55, and a slit 58 is formed adjacent to the stopper flange 57 for holding the stored condition of the button body 54 which has been pushed into the stored condition in accordance with the keyword. As shown in Figs. 16 and 17, torsion springs 66' as lock springs obliquely traverse slit notches 41 and 41' as button holes in the reset plate 43 and a reset plate presser plate 43' via stopper pins 66 between the reset plate 43 and the reset plate presser plate 43' which is closely set on the reset plate 43, and the slit 58 is engaged with each torsion spring 66' transversely extended via the stopper pin 66. Two stopper flanges 60 and 60' are axially arranged below the slit 58 on the side of the cover button 10 and are integrally formed on a shank 62 with a square cross section which has a diagonal length equal to the diameter of the shank 55. The stopper flanges 60 and 60' have a superior arc face 59 parallel and face-symmetrical relative to the minus notch 56 and flat faces 58 extended from the superior arc face 59, and are formed in fan configurations and face-symmetrically as shown in Figs. 4(f), (h), (i) and (j). As shown in Figs. 13, 14 and 15, obtuse-angle shoulder portions 58' are engaged with angle protrusion 71' formed midway in a depth direction of the button holes or slit notches 34 of the button presser plate 36 and angle protrusions 71' formed on end faces of the button passing holes or slit notches 37 of the key plate 40 shown in Figs. 14 and 15 by being pushed from the upper, lower, front and rear faces of the button presser plate 46 and the key plate 40. In this manner, an unexpected excess rotation is prevented and the button bodies 54 are prevented from being excessively damaged by the button presser plate 36 of zinc and the key plate 40. Additionally, the width of the surface of the shank 62 having a square cross section extended integrally from the upper and lower stopper flanges 60 and 60' toward the cover button 10 is vertically adapted to the size of the slit notch 37 of the key plate 40 to allow the relative sliding of the shank and the notch. Furthermore, a bottom 37' is formed into a configuration adapted to the superior arc face 59 as shown in Fig. 15 in such a manner that when the button body 54 is rotated to the stored condition with the minus notch 56, the superior arc of the upper stopper flange 60 of the pushed-in button body 54 slides and then stops as shown in Fig. 8(n). In Fig. 8, a mark x pointed by an upward arrow indicates a condition in which the key plate 40 cannot slide while a circle mark pointed by the upward arrow indicates a condition in which the key plate can slide. Additionally, Figs. 8(m) and (n) indicate a condition that the button body 54 is rotated to the stored condition: (m) shows an attitude in which the button body 54 is not pushed in and (n) shows an attitude in which the button body 54 is pushed in. Moreover, (o) shows a condition where the button body 54 in the non-stored condition is not pushed in while (p) shows a condition where the button body 54 in the non-stored condition is pushed in (may not be pushed in). In either condition (o) or (p), for the button hole or slide notch 37 of the key plate 40, the obtuse-angle shoulder portions 58' of the upper and lower stopper flanges 60 and 60' are engaged with the shoulder portion on the end portion of the slide notch 37, and also engaged with the triangular protrusion 71 formed on the bottom of the central portion of one face of an annular sub notch 34' in the rear face of the button presser plate 46 and the angle protrusion 71' formed on the end portion of the slit notch 37 of the key plate 40 as shown in Figs. 9(q), (r) and (s). In this manner, the relative sliding of the button body 54 and the key plate 40 is inhibited, and the function is inhibited from being deteriorated by excess wear of the shoulder portions and the protrusions 71 and 71'. As shown in Fig. 13, on the rear face of the button presser plate 36, opposite square lock notches 69' are formed on opposite sides of the button passing hole or slide notch 34, and the square lock notch 69' are also formed on opposite sides of the slide notch 37 of the key plate 40. As shown in Fig. 5(k), when the button body 54 is inserted through the button holes or slide notches 34 and 37 of the button presser plates 46 and the key plate 40 for assembly, opposite fork portions of a fork-shaped button presser washer 63 in the cover button 10 is inserted in the lock notches 69 and 69'. This inhibits the lever handle 7" from being turned from the outside with evil or criminal intent so that the key plate 40 is slightly slid via the rotary cam 47 shown in Fig. 2 cooperating with a rotation shaft 77 (Fig. 19) of the lever handle 7" and the keyword is searched for by using the clearance for unlocking. Specifically, the key plate 40 is inhibited from being slightly slid with the evil or criminal intent. Therefore, in the button presser plate 36, as shown in Fig. 12, the annular sub notch 34' is formed adjacent and around the button hole 34 in the predetermined depth, and the triangular protrusion 71 having half the depth of the sub notch 34' from its surface is formed on the bottom of the sub notch 34' as aforementioned and as shown in Fig. 9(q). As shown in Fig. 9(r), in the stored condition of the button body 54 the shoulder portions 58' of the upper and lower stopper flanges 60 and 60' in the stored condition are engaged with both the triangular protrusion 71 of the button presser plate 36 and the angle protrusion 71' of the key plate 40 from the upper and lower faces and the front and rear faces, so that the key plate 40 does not slide relative to the button bodies 54. As shown in Fig. 9(s), for the keyword for pushing the button body 54 in the stored condition against the elastic spring 64, the stopper flange 60' passes the slide notch 37 of the key plate 40 while the other stopper flange 60 passes the slide notch 37, thereby permitting the key plate 40 to slide relative to the button body 54. Additionally, in Figs. 9(r) and (s), the shanks 62 and 55 are omitted for convenience of illustration. When the button body 54 is assembled or set, as shown in Fig. 5(k), first the button washer 63 is inserted in the cover button 10, then the straight elastic spring 64 is inserted and a washer 65 is placed with grease into the annular sub notch 34' of the button presser plate 36 to be prevented from falling off. Subsequently, the shank 62 of the button body 54 is inserted in a square hole 65' in the washer 65, and the upper and lower stopper flanges 60 and 60' are inserted in the slide notch 37 of the key plate 40 and engaged with the angle protrusion 71' and also with the triangular protrusion 71 of the button hole 34 of the button presser plate 36. Subsequently, the button body 54 is set between the reset plate 43 and the reset plate presser plate 43' and fixed via the lock spring 66' of the torsion spring extended via the pin 66. Lastly, by setting the button body presser plate 46 via the tapered spring 67, the button body 54 is set and assembled. To assemble the clear button 48, as shown in Fig. 5(1), the straight spring 64 is assembled via a protection cover 68 into the cover button 10', the shank portion 50 is inserted through the hole in the cam frame 42 of the reset plate 43, the tapered face of the cam flange 52 is engaged with the cam face 42' of the cam frame 42, and lastly the tapered spring 67 is interposed between the reset plate and the presser plate 46 to apply an elastic force, thereby completing the assembly. To prevent the unexpected extraction of the outside lever handle 7" with evil intent or the like and optionally switch the right-handed or left-handed operation, as shown in Figs. 19(t) and (u) the fork-shaped rotation shaft 77 having a notch 73 in its side is inserted into a lever base 72 of the lever handle 7", a lever stopper washer 80 is inserted to an annular notch 74 formed in the substantially middle portion of the rotation shaft 72 relative to the rotation shaft 77', and a lever stopper snap washer 81 is inserted to a notch 75 adjacent to the annular notch 74. Furthermore, a lever shaft 83 is inserted to the rotation shaft 77 and a square hole 79 of the lever stopper washer 80, a bolt 85 for a hexagonal spanner is screwed in via a washer 84, and the entire component is fixed integrally to the base 72 of the lever handle 7" with a hexagonal spanner 86. For the notch 73 of the rotation shaft 72, a screw 85' is inserted into a screw hole 82' formed in the lever base 72 via a hexagonal spanner 86' and selectively into the notches 73 formed in the fork shape opposite to each other in a phase of 180º, and fastened. The lever handle 7" is thus rotatably provided relative to the rotation shaft 77, and fastened and fixed for the right-handed or left-handed operation condition or securely prevented from falling off by an axial reaction force exerted by the lever stopper washer 80 and the snap washer 81 attached to the rotation shat 77. Therefore, the extraction of the lever handle 7" intentionally or with criminal intent can be inhibited, and the lever handle can be optionally applied for the right-handed or left-handed operation. As shown in Fig. 20, the lever handle 7"' of the sub backing plate 4' on the rear side of the door is also prevented from being extracted via the snap washer 81 attached to the rotation shaft 77' relative to the base 72' or is rotatably provided in the same manner as aforementioned. The condition where the clear button 48 is thus assembled is shown in Fig. 6 while the condition where each button body 54 is assembled is shown in Fig. 7, and the left half of each figure is a sectional view of the non-stored condition while the right half is a sectional view of the stored condition. By rotating 180º with a minus driver or the like the minus notch 56 of the shank 55 of the button body 54 opposite to the cover button 10 visible in the button hole 44 with the keyword 1 to 0, A or B placed on the side of the button hole 44 of the body presser plate 46 which serves as a back plate in the stored condition, the keyword of the stored condition can be set. It can be visually confirmed whether the button body 54 of the keyword is in the stored condition or in the non-stored condition by placing a red, black or another mark on one side or the other side of the minus notch 56 of the shank 55 shown in Fig. 4(f). Specifically, when the right half is colored in black or the like, it can be visually confirmed that the keyword is in the stored condition. Additionally, in Figs. 14 and 16 numeral 62 denotes return biasing springs of the key plate 40 and the reset plate 46. In the aforementioned constitution, at the time of initial assembly, in accordance with a keyword ordered by a purchaser a constructor turns 180º the minus notch 56 of the shank 55 opposite to the cover button 10 of the button body 54 visible in the hole 44 of the body presser plate 46 of the button body 54 to set the predetermined stored condition. In this case, relative to the key plate 40 in the case frame 2' the upper and lower stopper flanges 60 and 60' of the button body 54 in the stored condition have the condition shown in Fig. 8(m) and Fig. 9(r), while the upper and lower stopper flanges 60 and 60' of the button body 54 in the non-stored condition have the condition shown in Fig. 8(o). One of the stopper flanges 60 and 60' is engaged with the angle protrusion 71 of the slide notch 37 of the key plate 40, while the other stopper flange 60' is engaged with the triangular protrusion 70 formed midway in the depth of the slide notch 34 of the button pressure plate 36 and inhibited from rotating. Therefore, in this condition even if the lever handle 7" is turned to an unlocking direction (to the right R in the case of the right-handed operation and to the left L in the case of the left-handed operation), the rotary cam 47 cannot slide the key plate 40. Therefore, the square mandrel 8' is not turned, the dead bolt 5 of the deadlock 6 is not retreated, and the deadlock 6 cannot be unfastened. Additionally, even when the keyword of the stored condition is searched for unlocking by turning with a force the lever handle 7" with criminal intent or intentionally to slide the key plate 40 little by little, the keyword of the stored condition cannot be found because the fork portion of the button stopper washer 63 is engaged with the lock notches 69 and 69' of the button presser plate 36 and the key plate 40 so that the lever handle and the key plate are kept in fixed condition. When a user himself unlocks and opens the door, by pushing the cover buttons 10 of the cover plate 9' in accordance with the keyword of the stored condition, the upper and lower stopper flanges 60 and 60' of the button body 54 change conditions from Fig. 18(m) to Fig. 18(n) and Fig. 9(s). The stopper flanges are disengaged from the angle protrusion 71' of the slide notch 37 in the key plate 40 and the triangular protrusion 71 of the presser plate 36, and are engaged with the slide notch 37. For the button body 54 in the non-stored condition, by rotating the lever handle 7" in the predetermined direction while the stopper flanges 60 and 60' are not engaged with the slide notch 37, the key plate 40 slides via the rotary cam 47 by the predetermined distance against the spring 64 without interfering with each button body 54. Therefore, the rotary cam 47 is rotated, the deadlock 6 is unfastened, the dead bolt 5 retreats and the door can be opened. During the operation, by pushing the button body 54 of the keyword of the stored condition via the cover button 10, the button body 54 pushed in accordance with the keyword of the stored condition has the condition shown in Fig. 5(k), and the lock spring 66 is engaged in the lock notch 58 to realize the locked condition. The pushed-in button body 54 is held in the locked condition without being returned. To return the stored button body 54 to the non-stored condition, by pushing the clear button 48 via the cover button 10', as shown in Figs. 16 to 18 the lock flange 52 is engaged with the cam face 42' of the lock frame 42 of the reset plate 43 as shown in Fig. 6. By sliding the reset plate 43, the lock spring 66' is disengaged from the lock flange 57 of each button body 54. Therefore, each button body 54 is returned to its initial attitude by the elastic force of the spring 64. Additionally, since the button body 54 in the non-stored condition is not pressed in as shown in the left half of Fig. 7, the button body 54 is in the reset condition even if the reset button 48 is pushed. In this case, all the button bodies 54 have reset attitudes in the non-stored condition. When the door is locked and closed again, the user pushes in the cover buttons 10 of the cover plate 9 having keyword numbers in accordance with the stored keyword, so that each lock notch 58 of the reset flange 57 is engaged with the lock spring 66' and the pushed-in locked condition is kept. In this case, when the lever handle 7" is rotated in the locking direction, the key plate 40 in the engaged condition slides by the predetermined distance without interfering with the button body 54 in the same manner as in the locking condition. The deadlock 6 is rotated in the locking direction via the square mandrel 8, the dead bolt 5 advances and the intrinsic locking/unlocking function is completed. When the button lock 1' cannot be locked/unlocked in an unexpected situation, by inserting a master key (not shown) via master key holes 32 and 32', the deadlock may be locked/unlocked. When the keyword in the unexpected condition is changed for the user's convenience, by rotating 180º toward the stored condition the minus notch 56 of each button body 54 which can be visually confirmed by using keyword numerals and characters placed beside the holes 44 of the body presser plate 46 on the rear side of the case frame 2' provided on the surface of the dead bolt, the keyword of the stored condition can be optionally changed. Additionally, it is natural that the mode of practicing the present invention is not limited to the embodiment mentioned above. For example, the handle is not limited to the lever handle but may be, for example, of a knob type or a thumb turning type. In respect of design change, naturally, the fan shape of the stopper flange of the button body can be appropriately changed. Additionally, to form the button body or the cover button of hard rubber or resin or the like is in the range of the design change. Furthermore, the door to which the invention is applied is not limited to the double-hinged type, and the invention can be naturally applied to a sliding type door. As aforementioned, according to the present invention, the dead bolt of the deadlock basically embedded in the door can advance or retreat optionally, and by pushing the buttons in accordance with the keyword designed beforehand, the deadlock can be locked/unlocked. Therefore, laborious key operation is unnecessary, and no trouble in locking/unlocking is caused by leaving behind the key. The locking/unlocking can be easily performed, and the deadlock is advantageously reliable in respect of prevention of crimes. At the time of locking, key operation is unnecessary, button operation is also unnecessary and a so-called fastening facility is advantageously provided. Additionally, the button body, the cover button, the lock spring and the like can be produced of the same size of the convenience of assembly. Mass productivity is enhanced, cost can be reduced, and the components can be used in common. Just by coloring one side of the minus notch of the button body or otherwise, the keyword of the button stored condition can be optionally selected. In the present invention, by selecting the combination of the keyword of the button-body stored condition beforehand, the button keyword of the stored or non-stored condition can be selectively determined or not-determined. As aforementioned, the mass productivity is enhanced and the cost can be reduced. Furthermore, degree of freedom can be provided for facilitating the selective combination of the keyword. Specifically, the same combination number of the keyword can be used for assembly through manufacture and wholesale processes, and the user can easily change the combination of the keyword as required. The degree of freedom for assembly or use is thus advantageously enhanced. The shank of the button body is formed in a bar shape, and two stopper flanges formed on the shank are engaged with the slide notch of the key plate in such a manner that the button body is releasably engaged. Only when the button body is engaged with and intersects the key plate, the key plate can slide relative to the button body. Even when the button body is engaged with the key plate, the key plate can slide only while the upper and lower stopper flanges of the button body are engaged with the angle protrusion formed on one end of the slide notch of the key plate and the triangular protrusion formed on the other end of the button hole of the button presser plate which slides relative to the key plate. In this manner, the rotation of the button body is absolutely prevented double, and the button body is inhibited from being rotated by pushing the button body unexpectedly, intentionally or with criminal intent. Even when key plate is forced to be slid by means of rotation of the handle, double engagement of the two stopper flanges with the hook notches inhibits the relative sliding of the key plate and the button body. Therefore, even in the key plate of zinc, engagement portions are not worn. Consequently, durability is advantageously enhanced. Moreover, since the key plate is slidably inserted between the button presser plate and the reset plate which slide relative to the key plate and the elastic spring is interposed, the key plate cannot be freely slid even by freely rotating the handle in an unexpected manner. Therefore, the key plate can be slid by rotating the handle only for operation. Since the snap washer is attached to the rotation shaft of the handle, the handle cannot be easily extracted. Therefore, the handle cannot be removed and taken away intentionally or with criminal intent, which is effective as a safety measure for prevention of crimes. Since the rotation shaft of the handle is attached with the screw bolt, the handle is prevented from being extracted intentionally or with criminal intent as aforementioned. Additionally, the right-handed or left-handed operation of the handle can be selectively performed only by switching and tightening the screw bolt. Since the button washer is inserted via the spring between the key plate and the button presser plate, the keyword and the button in the stored condition cannot be searched successively by moving the key plate slightly via the handle with evil or criminal intent. In this respect, crimes can be advantageously prevented, and safety is relatively high. Furthermore, by classifying one side of the minus notch for rotating the button with color and rotating the minus notch of the button with the minus driver 180º from the rear-plate side, the keyword of the stored condition can be easily changed or set. Additionally, one of the buttons can be provided as the clear button for releasing the buttons. When the buttons are wrongly pushed in against the keyword, by condition. Simply by rotating the button body via the minus notch, the stored or non-stored condition can be detected, which is advantageous in operation. Additionally, by rotating the button body via the minus notch 180º in accordance with the keyword, the stored or non-stored condition can be switched. In the same manner as the conventional rotary button, the switching angle is larger than 90º. Therefore, a large degree of freedom exists in the engagement of the key plate with the two-step stopper flanges of the button body. The engagement portions are hardly worn in the sliding condition except when the button body is locked or when the key plate relatively slides. Consequently, even when zinc materials which can be mass-produced are used, excellent durability can be advantageously kept. In a button lock for locking/unlocking a deadlock mounted in a door, a stored condition or a non-stored condition is selected in a rotation system while button bodies are inserted in a case frame, a handle cannot be easily extracted intentionally or with criminal intent, and right-handed or left-handed operation can be optionally selected. A minus notch 56 is slotted in one end of a button body 54 for optionally selecting the stored or non-stored condition; a lock flange 54 is formed for realizing a locked condition when depressed; upper and lower fan-shaped stopper flanges 60 and 60' are formed on the lower portion of the lock flange 54 with different phases in a 180º peripheral direction; a shank 55' having a square cross section is integrally formed for sliding relative to a slide notch 37 of a key plate 40; a lever handle 7'' can be fixed with a screw 85' relative to a rotation shaft 77 optionally for the right-handed or left-handed operation; and the lever handle can be rotated relative to the rotation shaft 77 via a snap washer 84 and can be prevented from being extracted. The stored or non-stored condition can be optionally selected in accordance with the button keyword by means of 180º rotation. Furthermore, a range of a rotation angle of an engagement portion for permitting the key plate to slide is wide, thereby decreasing wear of each zinc component. Durability is enhanced, assembly can be easily performed, the handle can be securely prevented from being extracted intentionally or with criminal intent, and the right-handed or left-handed operation can be optionally selected.

Claims: A button lock which is provided with multiple button bodies (54) covered with cover buttons of the same configuration and the same size, said button bodies being exposed an a cover plate (9') of a case frame (2') on a surface of an outer door, set optionally in an arrangement in accordance with a keyword for unlocking a dead bolt of a deadlock and disengageably engaged with a key plate (40) which can slide in the case frame, a handle (7'') cooperating with the key plate being engaged via a square mandrel (8') with said deadlock, wherein said button body is formed in a bar shape and integrally has upper and lower stopper flanges (60, 60'), a predetermined number of slit notches (37) of the same configuration and the same size in which the button bodies (54) are releasably inserted are formed in predetermined positions in the key plate (40) which is slidably laminated an a button presser plate (36) in said case frame (2'), said each button body (54) loosely inserted in the slit notch (37) of the key plate (40) can advance or retreat orthogonally with the case frame, a minus notch (56) is formed in a tip end of the button body (54) in such a manner that said stopper flanges (60, 60') permit a selective attitude of the button body in a position in which in one turned attitude the button body intersects the key plate to inhibit the key plate from advancing or retreating while in another turned attitude the key plate is permitted to advance or retreat, each button body can be releasably engaged with a button reset plate (43), the handle cooperating with said deadlock can be engaged via a rotary cam with the key plate and the reset plate, a fixing screw is provided for selectively fixing the handle relative to a rotation shaft of the rotary cam for right-handed or left-handed operation, and a lock clear button of the key plate is provided an the cover plate of said case frame, characterized in, that the button bodies (54) and the key plate (40) are designed such that the button bodies are to be turned substantially by 180° in order to set the stored condition. A button lock according to claim 1, characterized by a fan shape of said stopper flanges (60, 60'). A button lock according to claim 1, characterized in, that a hook notch is formed in said key plate (40) and can be engaged with said stopper flanges (60, 60') of said button body (54). A button lock according to claim 3, characterized in, that said hook notch is formed in an angle shape. A button lock according to claim 1, characterized in, that said key plate (40) is slidably interposed. between said button presser plate (36) and said button reset plate (43). A button lock according to claim 5, characterized in, that said button reset plate (43) is provided with a lock spring (66) for an engagement with a hook slit of said button body (54). A button lock according to claim 1, characterized in, that said clear button has a cam face formed thereon which can release locking of each button body (54) in said button reset plate (43). A button lock according to claim 1, characterized in, that an elastic spring is interposed along the button body (54) between said key plate (40) and said button reset plate (43). A button lock according to claim 1, characterized in, that said rotation shaft is provided with a snap washer for preventing the handle from being extracted. A button lock according to claim 9, characterized in, that a washer for fixing the handle is interposed between said snap washer and the rotation shaft. A button lock according to claim 1, characterized in, that said rotation shaft is attached via a screw bolt to a base of the handle. A button lock according to claim 1, characterized in, that a left or right side of said minus notch of said button body (54) is colored and/or classified. A button lock according to claim 1, characterized in, that a button washer is attached along the button body (54) via a spring to lock notches of said key plate (40) and the button presser plate (36).

Inventors: NAKAJIMA SUSUMU, TAKAHASHI KOICHI, NAKAJIMA, SUSUMU, TAKAHASHI, KOICHI
Applicants: NAGASAWA SEISAKUSHO, KABUSHIKI KAISHA NAGASAWA SEISAKUSHO
Application year: 1998
Main classification: E05B37
IPC codes: E05B37, E05B63, E05B3