JP5500490B2 - Unlocking prevention device for pushbutton lock - Google Patents

Description

  The present invention relates to an unlocking prevention device for a pushbutton lock (hereinafter simply referred to as an “unlocking prevention device”). In particular, in a pushbutton lock in which a password can be arbitrarily set, a new password is released by canceling the previous password. The present invention relates to an unlocking prevention device that can prevent an unlocked state as a transitional state when setting.

  The present applicant has previously proposed a password setting mechanism (hereinafter simply referred to as a password setting mechanism) of a pushbutton lock capable of arbitrarily setting a password according to Patent Document 1 below.

  The PIN code setting mechanism includes a plurality of push button units each including a button shaft that is an elongated casing and a push button that is integrally coupled to an outer end of the button shaft, and is arranged in a fixed development pattern in the outer case. The push button unit is guided so as to be movable in the length direction of the button shaft with the push button protruding from the surface of the outer case, and is urged in the direction in which the push button protrudes from the outer case surface. The unlocking cutout is formed in the inner end of the pushbutton unit in the same direction, and when the pushbutton of the pushbutton unit is pushed down, the position of the pushed down button shaft is held separately, and all the pushbutton units pushed down at the time of reset are A stopper mechanism that releases at the same time is provided, and when the selected push button is pressed down, the unlocking notches of all the button shafts are positioned at the unlocking level. In the direction It is divided into a button shaft A integrated with the push button and a button shaft B formed with an unlocking notch by a cut surface that crosses a certain point, and the direction of each button shaft A is the same, and the first one closer to the push button. A first engagement notch and a second engagement notch closer to the button shaft B are formed, and a third engagement notch in the same direction as the first and second engagement notches is formed on the button shaft B, respectively. The interval between the two engagement notches is set to be the same as the push-down amount of the selected push button, and on the other hand, it is perpendicular to the button shafts A and B, and is a thick plate block shape that can cover the development pattern of all push button units. A stop plate holder is provided in the outer case, and a guide hole through which the button shafts A and B are inserted is formed in the stop plate holder in the same development pattern as the push button unit group. On the other hand, the stop plate is connected to each guide hole. A stop plate in which a hole is formed and a pair of engagement protrusions engageable with the engagement notch is formed in each stop plate storage hole The pair of engagement protrusions are housed so as to be movable in a direction close to or away from the push button unit, and the first engagement notch of the button shaft A and the first of the button shaft B which are respectively pressed down are selected. 3. A stop plate control body that is set so that the unlocking notch of the button shaft B is at the above unlocking level when engaged with the three engaging notches, and a stop plate control body that is simultaneously engaged with all the stop plates, and a mode of overlapping with this The carrier connected to the stop plate control body is guided so as to be movable in the same direction as the movement direction of the stop plate, and the first spring member causes the engagement protrusion to be moved into the engagement notch of the push button unit by the first spring member. Further, the second spring member, which is biased in the engaging direction and has a larger elasticity than the first spring member, is disposed on the side opposite to the first spring member with respect to the stop plate control body, and the stop plate control body and the carrier. So that when the PIN is changed, the sumter By operating the push button lock operating member such as a button, the stop plate is driven in the direction away from the push button unit via the drive mechanism controlled by the operating member, the carrier, the second spring member, and the stop plate control body, and the stopper All the button shafts A are released by the mechanism to cancel the password number so far, and the newly selected push button is pushed down in this state, and the carrier and the first spring member are connected by the operation of the operation member and the elasticity of the first spring member. A new code number is set by moving the stop plate in the direction in which the engagement protrusion engages the engagement notch, and in addition, the set code number is set by fixing the stop plate control body by operating the switching device. Is characterized in that it can be fixed.

  This password setting mechanism is the same as the number setting mechanism operating method (so-called one-time method) that can set a different password for each unlocking and re-locking, and the same for a plurality of times of locking and unlocking. It is possible to adopt both methods of operation (so-called full-time method) that can use a personal identification number.

Japanese Patent Application No. 2008-183216

  In order to understand the present invention including the content of the concept of the lockless prevention device according to the present invention, the configuration of the password setting mechanism must be described. Therefore, the password setting mechanism described in Patent Document 1 is described below. The configuration of will be briefly described.

  Before that, a general configuration of the pushbutton lock having the above-described PIN number setting mechanism will be described with reference to the drawings of Patent Document 1. In this description, the reference numerals of the drawings of Patent Document 1 are shown. Therefore, (parentheses) are added to the reference numerals.

As shown in FIGS. 1 and 2 of Patent Distribution 1, a plurality (11 in the illustrated embodiment) of push buttons (2, 2) are arranged in a grid shape on the surface (1) of the case. The push button 2 and the button shaft 3 integrally coupled thereto are guided so as to be movable in the vertical direction in FIG. 2 by a guide mechanism (not shown) and are urged upward.

  In this case, the push button (2, 2) selected and pushed down is locked at a position where it is pushed down by a stopper mechanism described later, and the position is held.

  On the other hand, an unlocking notch (4) is formed at the inner end portion of each push button (3) in the same direction, and the unlocking notch (3) of the button shaft (3) to be pushed down when setting a password. 4) (the leftmost and third in FIG. 2) is at the same level as the baffle plate (5) from the beginning as shown in FIG.

  On the other hand, each button shaft (3) passes through a corresponding insertion hole (6) in the baffle plate (5). Usually, the push button lock is operated by a plurality of selected operations, such as a thumb turn for unlocking after being depressed. When the member is operated, for example, the baffle plate 5 is configured to move upward in FIG. 1, so that as is apparent from FIG. 2, there is nothing to prevent the movement of the baffle plate (5). The locking mechanism is released by the member and unlocked.

  Next, the main part of the PIN code setting mechanism described in Patent Document 1 will be briefly described. The button shaft (3) in the PIN code setting mechanism is selected as compared with the conventional one when the PIN code is set. Those that are pushed in and those that are not pushed in and remain in the same position are the same length.

  That is, as shown in FIG. 3 and FIG. 4 of Patent Document 1, the button shaft 3 is divided into a button shaft (3A) and a button shaft (3B). The first and second engagement notches (18, 19) (see FIG. 13) are formed at regular intervals on the upper end portion in FIG. 3 of the button shaft 3A urged in the direction protruding from the front. The interval between the equal notches (18, 19) is set to be the same as the stroke when the push button is pushed.

  When the password is set in the full-time method, as shown in FIGS. 13 to 15, in the unlocked state, that is, the unlocking notch (4) of the button shaft (3B) is level with the baffle plate (5). (See FIG. 13), the engagement protrusions (25, 25) of the stop plate (25) are connected to the first engagement notch (18) of the button shaft (3A) and the third engagement of the button shaft (3B). Engage with the joint notch (21) (see FIG. 14).

  As described above, the length of the push button that is pushed when the personal identification number is set is set. The position of the shaft 3A in the length direction is left as it is, and the engagement protrusions (25, 25) of the stop plate (25) are moved to the second engagement notch (19) of the button shaft (3A) and the first of the button shaft (3B). 3. Engage with the engagement notch (21).

  The personal identification number set as described above is canceled for each unlocking (in the case of the full-time system) by the rotation of the operation member (14: see FIG. 9) such as a thumb turn.

  That is, the stop plate (25) is engaged with each other by the movement of the stop plate control body (27) that engages with the stop plate (25) and moves in the length direction when the operating member (14) rotates. Separated from the button shaft 3 (13) or close to the button shaft 3, but when separated, the push button 2 protrudes from the surface of the case by biasing, so the button shafts 3A, 3B connected as shown in FIG. ) Are separated as shown in FIG. 13, so that the password is canceled.

  Since the password setting mechanism is described in Patent Document 1, further detailed description is omitted.

  The security code setting mechanism described in Patent Document 1 configured as described above cancels the security code when unlocked, but does not set a new security code by pressing the push button after unlocking. If the lock is locked, as is apparent from FIG. 13, the lower engaging protrusion (25) of the entire retaining plate (26) is connected to the second engaging notch (19) of the button shaft (3A) and the upper engaging protrusion (25). The mating protrusion (25) engages with the third engagement notch (21) of the button shaft (3B), and as a result, the unlocked state, that is, the unlocked state is always achieved without pressing the push button.

  Accordingly, an object of the present invention is to provide an unlocking prevention device capable of preventing the above-described constantly unlocked state.

  In order to achieve the above object, the present invention provides a plurality of push button units each comprising a button shaft, which is an elongated casing, and a push button integrally coupled to the outer end of the button shaft, in a fixed development pattern in the outer case. The push button unit is guided in such a manner that the push button protrudes from the surface of the outer case so as to be movable in the length direction of the button shaft, and the push button is biased in a direction protruding from the outer case surface. On the other hand, the unlocking notch is formed in the same direction at the inner end of each button shaft, and on the other hand, when the push button of the push button unit is pushed down, the position of the pushed button shaft is held separately and pushed down at the time of reset. A stopper mechanism that releases all the push button units at the same time is provided so that when the selected push button is pushed down, the unlock notches of all the button shafts are positioned at the unlock level. As well as The button shaft A is integrated with the push button and the button shaft B is formed with an unlocking notch by a cut surface that crosses a certain portion in the vertical direction, and each button shaft A is in the same direction and close to the push button. A first engagement notch on the one side and a second engagement notch closer to the button shaft B, and a third engagement notch on the button shaft B in the same direction as the first and second engagement notches, respectively. A thick plate that sets the interval between the first and second engagement notches to be the same as the push-down amount of the selected push button, and is perpendicular to the button shafts A and B and can cover the unfolded pattern of all push button units. A block-shaped stop plate holder is provided in the outer case, and a guide hole through which the button shafts A and B are inserted is formed in the stop plate holder in the same development pattern as the push button unit group, and connected to each guide hole. A stop plate storage hole is formed, and a pair of engagement protrusions that can be engaged with the engagement notches are formed in each stop plate storage hole. The formed stop plate is movably accommodated in a direction close to or away from the push button unit, and the distance between the pair of engagement protrusions is selected from the first engagement notch of the button shaft A which is selected and pushed down. When engaged with the third engagement notch of the button shaft B, the unlocking notch of the button shaft B is set to the above unlocking level, and a stop plate controller that simultaneously engages all the stop plates, The carrier coupled to the stop plate control body in such a manner as to overlap with this is guided so as to be movable in the same direction as the movement direction of the stop plate, and the engagement protrusion is pushed by the first spring member to the push button unit. Further, the second spring member having a larger elasticity than the first spring member is urged in the direction of engagement with the engagement notch of the first spring member, and the second spring member is opposed to the first spring member with respect to the stop plate control body. Armed between the control body and the carrier, the code number is changed. Further, by operating the push button lock operating member such as a thumb turn, the entire stop plate is driven away from the push button unit via the drive mechanism controlled by the operation member, the carrier, the second spring member, and the stop plate control body. At the same time, all the button shafts A are released by the stopper mechanism to cancel the code number until then, and the newly selected push button is pushed down in this state, and the carrier and the first spring member are elastically operated by the operation of the operation member and the elasticity of the first spring member. A new password is set by moving the connected stop plate in the direction in which the engagement protrusion engages the engagement notch, and in addition, the stop plate control body is fixed by operating the switching device. In this configuration, a retaining plate that intersects with the button shaft A is disposed so as to be movable in one direction, and the button shaft A is attached to a portion of the retaining plate where the button shaft A interferes. A movable insertion hole is opened, and an inclined end edge portion is formed on the button shaft A on the push button side with respect to the insertion hole, and by pushing any one of the push buttons protruding from the outer case surface, the above-mentioned empty hole is formed. The stop plate is moved in one direction, while being guided in the outer case so as to be movable in the other direction that is perpendicular to the one direction that is the moving direction of the empty stop plate, and the operation of the pushbutton lock operating member A slider that can move in the other direction is disposed in conjunction with the other, and on the other hand, the stopper plate is biased in a direction in which one end thereof engages with the slider, and the button shaft A is inclined when the push button is pushed. The emptying plate moves in a direction away from the slider by a wedge action generated between the end edge portion and the opening end edge of the insertion hole.

  In the unlocking prevention device for a pushbutton lock according to the present invention configured as described above, in the unlocked state, the unlocking notches of all the button shafts B are aligned with the baffle plates. The slider is engaged by the force, and the operation member is fixedly locked via the slider, so that the latch of the push button lock cannot be moved.

  On the other hand, if any one push button is pushed in the unlocked state, that is, if the setting of the password is started, between the inclined end edge portion of the button shaft A of the push button and the opening end edge of the insertion hole. Due to the generated wedge action, the emptying plate moves away from the slider and the slider becomes free, so that the latch can be moved via the operation member.

The top view of the principal part of this invention which abbreviate | omits and shows the surface plate of the case of a pushbutton lock in the state which unlocked and removed the latch. FIG. FIG. 2 is a plan view similar to FIG. 1 and shows a state where at least one push button is pushed. FIG.

  A retaining plate that intersects with the button shaft A is disposed so as to be movable in one direction, and an insertion hole through which the button shaft A can freely move is opened in a portion of the retaining plate that the button shaft A interferes with. An inclined edge is formed on the button shaft A on the side, so that any one of the push buttons protruding from the surface of the outer case is pushed so that the emptying plate moves in one direction, In the case, a slider that is guided so as to be movable in the other direction that is perpendicular to the one direction that is the moving direction of the retaining plate and that can move in the other direction in conjunction with the operation of the pushbutton lock operating member is disposed. On the other hand, the retaining plate is urged in a direction in which one end thereof engages with the slider, and when the push button is pushed, between the inclined edge portion of the button shaft A and the opening edge of the insertion hole. The wedge action that occurs causes the retaining plate to move away from the slider. It is possible to prevent a so-called continuously locking of the lock.

  In FIGS. 1 and 2, reference numeral 1 denotes an emptying plate, and reference numeral 3 </ b> A denotes a button shaft A. In the description of this embodiment, the reference numeral 3A is an exception, and the reference numeral is attached independently of the reference numeral in the drawing of the above-mentioned Patent Document 1.

  As is apparent from FIG. 1, the blanking plate 1 is a plate-like body having a generally left-sided toroidal shape, and is supported and guided so as to be movable in one direction as a whole (left and right in FIG. 1). .

  Further, as apparent from FIG. 2, the retaining plate 1 is disposed at a level position (vertical direction in FIG. 2) intersecting with the button shaft 3A, and the retaining plate on which the button shaft A3A interferes. 1, a plurality of insertion holes 2 and 2 through which the button shaft A3A can move in the left-right direction in FIG.

  Furthermore, the retaining plate 1 is urged in the direction close to the slider 5 described later (leftward in FIG. 1) by the elasticity of the retaining plate springs 4 and 4 as compression coil springs.

  On the other hand, a block-like (see FIG. 2) slider 5 extending in the vertical direction in FIG. 1 is guided so as to be movable in the length direction in the vicinity of the left side in FIG.

  An engagement notch 12 (see FIG. 3) having a locking step portion 11 formed below is formed on the side edge of the upper end portion of the slider 5 facing the retaining plate 1.

  In FIG. 1 and FIG. 2 showing the unlocked state of the pushbutton lock, the retaining plate 1 is urged to the left in FIG. 1 by the elasticity of the upper air retaining plate springs 4, and the protrusion on the left side is the above-mentioned The slider 5 is engaged with the engagement notch 12 of the slider 5.

  On the other hand, as shown in FIG. 1, an operating member 8 such as a thumb turn and a pinion 13 which is coaxial and integral with the operating member are coupled to the base of the latch 9, and this pinion 13 is formed on the left side of the slider. Is engaged with the rack 14.

  On the other hand, an inclined edge 7 is formed on the shoulder of the push button 3A with respect to the insertion hole 2 on the push button 6 side (see FIG. 2).

  Therefore, when any one of the push buttons 6 projecting on the outer case surface is pushed, the retaining plate 1 is moved by the wedge action generated between the inclined edge portion 7 and the opening edge of the insertion hole 2. It moves in one direction (rightward in FIG. 1), that is, in a direction in which the engagement of the retaining plate 1 and the slider 5 is released.

  Note that the button shaft A of the pushed push button is stably locked at the position where it is pushed in by the topper mechanism 15 (see FIG. 4).

  Since the unlocking prevention mechanism according to the embodiment of the present invention is configured as described above, when the pushbutton of the pushbutton lock is appropriately selected and a personal identification number is input, the pushbutton lock is unlocked. The cover plate can be opened by turning the operation member 8 (see FIG. 2) such as the lever and removing the latch 9 (see FIG. 1) from, for example, the engaging portion of the mail box.

  In the operation of the so-called one-time method described above, after unlocking, a new password is set, and then the operation member 8 such as a thumb turn is turned to lock.

  At this time, if the operation member 8 is turned in the locking direction without setting a new password after unlocking, the conventional pushbutton lock is not locked as described above. In the pushbutton lock provided with the lock prevention device, when the operation member 8 is turned without pushing the pushbutton for setting a new password, the protrusion of the retaining plate 1 is moved to the slider 5 as is apparent from FIG. Therefore, the operation member 8 cannot be rotated in the locking direction, and therefore the pushbutton lock can be completely prevented from being in the unlocked state.

  On the other hand, when one push button 2 is pressed to set a new password after unlocking, the wedge action generated between the inclined edge 7 and the opening edge of the insertion hole 2 as described above causes Since the retaining plate 1 moves in one direction (rightward in FIG. 1), that is, in a direction in which the engagement between the retaining plate 1 and the slider 5 is released (see FIG. 3), the slider 5 is released from the retaining plate 1. As a result, the pushbutton lock can be locked.

1 Stopper plate 2 Insertion hole 3A Button shaft A
4 Stopper leaf spring 5 Slider 6 Push button 7 Inclined end edge 8 Thumb turn 9 Hatch 11 Locking step 12 Engagement notch 13 Pinion 14 Rack 15 Stopper mechanism

Claims (1)

  A plurality of push button units each consisting of a button shaft, which is an elongated casing, and a push button integrally coupled to the outer end of the button shaft, are arranged in a fixed development pattern in the outer case, and each push button unit is removed from the push button. In a state where it protrudes from the surface of the case, it is guided so as to be movable in the length direction of the button shaft, and the push button is urged in a direction protruding from the surface of the outer case, while the inner end of each button shaft is unlocked. A notch is formed in the same direction, and on the other hand, when the push button of the push button unit is pushed down, the position of the pushed down button shaft is held separately, and a stopper mechanism that simultaneously releases all the push button units pushed down at the time of reset is provided When the selected push button is pressed down, the unlock notches of all the button shafts are positioned at the unlock level, and all the button shafts have the same length and cross a certain portion in the length direction. Cut off The button shaft A integrated with the push button and the button shaft B formed with the unlocking notch are divided by the surface, and the first engagement notch and the button shaft closer to the push button are arranged in the same direction with each button shaft A. A second engagement notch closer to B is formed, and a third engagement notch in the same direction as the first and second engagement notches is formed on the button shaft B, respectively, and an interval between the first and second engagement notches is set. In the outer case, a thick plate block-like stop plate holder that is set to be the same as the push-down amount of the selected push button and that is perpendicular to the button shafts A and B and can cover the developed pattern of all push button units In this stopper plate holder, a guide hole through which the button shafts A and B are inserted in the same development pattern as the push button unit group is formed, and on the other hand, a stopper plate storage hole is formed in connection with each guide hole. A stop plate in which a pair of engagement protrusions engageable with the engagement notch is formed in the plate accommodation hole close to the push button unit or Is stored movably in a separating direction, and the distance between the pair of engaging protrusions is set such that the first engagement notch of the button shaft A and the third engagement notch of the button shaft B, which are selected and pushed down, respectively. Is set so that the unlocking notch of the button shaft B is at the above unlocking level, and the stop plate control body that simultaneously engages all the stop plates, and the stop plate control body in a manner overlapping with this. The carrier coupled to the guide plate is guided so as to be movable in the same direction as the movement direction of the stop plate, and the first spring member causes the stop plate control body to engage with the engagement notch of the push button unit. Further, the second spring member, which is more elastic than the first spring member, is biased between the stop plate control body and the carrier on the side opposite to the first spring member with respect to the stop plate control body. Therefore, when the PIN is changed, the push button lock operating member such as the thumb turn is operated. As a result, the entire stop plate is driven away from the push button unit via the drive mechanism controlled by the operation member, the carrier, the second spring member, and the stop plate control body, and all the button shafts A are released by the stopper mechanism. In this state, the newly selected push button is pressed down, and the engagement protrusion engages the carrier and the stopper plate connected thereto by the operation of the operation member and the elasticity of the first spring member. A new security code is set by moving it in the direction of engagement with the joint notch, and in addition, the set security code can be fixed by fixing the stop plate control body by operating the switching device. An emptying plate that intersects with the button shaft A is disposed so as to be movable in one direction, and an insertion hole through which the button shaft A can freely move is opened at a portion of the emptying plate where the button shaft A interferes. An inclined edge portion is formed on the button shaft A on the push button side with respect to the insertion hole, and by pushing any one of the push buttons protruding on the outer case surface, the above-mentioned retaining plate is moved in one direction. On the other hand, a slider that is guided in the outer case so as to be movable in the other direction that is perpendicular to the one direction that is the moving direction of the retaining plate, and that can move in the other direction in conjunction with the operation of the pushbutton lock operating member. On the other hand, when the pushbutton is pushed, the slanting edge of the button shaft A and the opening edge of the insertion hole are urged in the direction in which the one end engages with the slider. An anti-locking device for a pushbutton lock, wherein the emptying plate moves in a direction away from the slider by a wedge action generated between

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