JP2008240295A - Damage prevention mechanism of card lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damage prevention mechanism of a card lock capable of preventing the internal mechanism from being damaged even if a different key card or an iron sheet is inserted into the card insertion passage. <P>SOLUTION: This card lock is unlocked by moving magnetic pins 22, 22 by inserting a key card 4 into a card slit and further pushing the key card into the card slit. A ward pin is fixed to the bottom of the card slit, and a cutout engaged with the ward pin is formed at the insertion end of the key card. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card lock damage prevention mechanism (hereinafter simply referred to as a damage prevention mechanism), and more particularly to a damage prevention mechanism that prevents damage to an internal mechanism even when a different-key card or iron plate is inserted into a card insertion passage. .
Related.

  The present applicant has previously proposed a novel composite card lock with the following Patent Document 1, and this composite card lock is currently in practical use.

  As shown in FIGS. 1 to 3, the composite card lock is opened on the indoor side, and has an inner card slit 3 for housing the lock card 2 having the engagement holes 1 and 1 opened, and an open door on the outdoor side. A lock box 6 in which the outer card slit 5 into which the key card 4 having the engagement holes 1 and 1 is inserted is inserted on the substantially same plane, and the lock box 6 is fixed in the lock box 6. A fixed block 8 in which a plurality of tumbler slits 7 substantially perpendicular to the card slit are continuously provided in the width direction of the key card 4 and a plate-like body having an overall T-shape, and the T-shaped horizontal bars are the inner and outer sides. A pair of detection protrusions for detecting engagement holes, which are housed in the respective tumbler slits 7 so as to straddle the card slits 3 and 5 and project symmetrically with respect to the T-shaped vertical bar at the end green on the card slit side of the horizontal bar. 9, 9 is pressed against the card inserted in the card slit And a plurality of swing tumblers 11 guided so as to be able to move at least by the thickness of the card and to swing in the card thickness direction, and a card slit with respect to the fixed block 8. Are disposed on the opposite side, guided so as to be slidable in the width direction of the key card 4, and escape slits 12, 12 that allow the tip of the vertical bar of each swing tamper 11 to swing in the locked state, and When the vertical bar of the oscillating tumbler is in an upright state substantially perpendicular to the card slit, the movable groove formed so that the oscillating end protruding outside the fixed block engages with the through grooves 13 and 13 perpendicular to the escape slit 12. The sliding contact surface of the block 14 and the fixed and movable blocks 8, 14 penetrates in the card thickness direction outside the swing tumbler and can move in the penetration direction. It has at least one pair of tumbler pins 15 and driver pins 16 that are guided and urged in a direction to be pressed against the key card, and the holes of the key card 4 where the tip of the tumbler pin 15 abuts are provided. The length of the tumbler pin 15 is set so that the joint surface between the tumbler pin and the driver pin is fixed and aligned with the sliding contact surface of the movable blocks 8 and 14 according to the presence or absence.

  In addition, the present applicant has proposed a novel magnetic card lock with Patent Document 2 described later, and this magnetic card lock is also in practical use.

As shown in FIGS. 4 and 5, the magnetic card lock has a fixed reference member 18 having a plurality of first pin holes 17 and 17 and a moving member 21 having a plurality of second pin holes 19 and 19 opposed to each other. In order to restrict or allow relative movement of the moving member 21 with respect to the reference member 18, the first pin hole 17 and the second pin hole 19 are held to correspond to each other. Or an arbitrary number of magnetic pins 22 held in one pin hole, and a required magnetized portion for operating the magnetic pins when the moving member 21 is restrained by magnetic force so as to be aligned with the shear line Is provided with a card insertion passage 23 in which the card can be inserted in close proximity to the reference member 18 or the moving member 21, and the locking mechanism is provided by the moving member 21 that is free from the reference member 18 by the combined card. In the magnetic card lock to be controlled, the moving member 21 is guided so as to move in the direction perpendicular to the card insertion direction, and the return spring 25 is elastically mounted between the base frame 24 and the front portion of the moving member 21. The moving member 21 is urged in the locking position direction by the elasticity of the other side, and on the other hand, the planar shape is L-shaped behind the card insertion passage in the base frame 24, and one end is opposed to the front end of the inserted card, and the other end The transmission lever 26 which is made to face the rear part of the moving member is pivotally mounted, and is more elastic than the return spring of the moving member between the other end of the transmission lever 26 and the rear part of the moving member 21. This is characterized in that a large pressing spring 27 is mounted.
Japanese Patent Publication No. 04-026388 Japanese Patent Application Laid-Open No. 07-293066

  Any of the card locks configured as described above, that is, the one described in Patent Document 1 or the one described in Patent Document 2, inserts the key card into the card slit (card insertion passage). As a result, the tumbler that has fixed the fixed block (reference member) and the movable block (moving member) to each other is moved to free the movable block (moving member) from the fixed block (reference member).

  The card lock described in Patent Document 1 is, for example, by a release member (not shown) interlocked with the door handle, or the card lock described in Patent Document 2 is further deeper after unlocking the joint card inserted in the card slit. The movable block (moving member) is moved in a direction perpendicular to the direction in which the key card is inserted, and a locking mechanism such as a dead bolt is controlled using this movement.

  In the card lock described in Patent Document 1, as shown in FIG. 6, the release lever is pushed by pushing the key card 4 inserted into the outer card slit further back (downward in FIG. 6). The release lever 29 supported so as to be rotatable around the shaft 28 is driven.

  In this case, however, the ward pin 34 shown in FIG. 6 is a constituent member of the present invention, and is therefore ignored in the above description.

  The release lever 29 is formed by linking the first to third levers 31, 32 and 33 to each other, and the first and second levers 31 and 32 are strong torsion coils so that the relative angle between them becomes small. Although a spring (not shown) is elastically mounted, a normal angle is maintained at a normal angle by a stopper (not shown).

  Further, the second and third levers 32 and 33 are linked so that they can freely rotate with each other. As a result, as shown in FIG. 7, when the key card 4 is pushed further downward than FIG. The first and second levers 31 and 32 are integrally rotated in the clockwise direction without changing the relative angle, and the free block of the first lever 1 moves the movable block 14 (see FIG. 1) to the left in FIG. Move to.

  At this time, the relative angle between the third lever 13 and the second lever 32 guided linearly (vertically in FIGS. 6 and 7) changes. As described above, the second and third levers 32 and 33 are changed. Since they can rotate freely with respect to each other, there is no twist between them.

  On the other hand, in the magnetic card lock according to the invention described in Patent Document 2, as shown in FIGS. 4 and 5, if a not-shown card is inserted into the card insertion passage 23 and is pushed upward in FIG. Whether the card lock is unlocked or locked, the tip of the combined card pushes one end of the transmission lever 26 and rotates it clockwise.

  If the card lock is unlocked, the moving member 21 is free from the reference member 18, so that the other end of the transmission lever 26 pushes the moving member 21 to the left in FIG. The locking member such as a dead bolt is controlled using this movement.

  However, the card lock according to the invention described in Patent Document 1, the one disclosed in Patent Document 2, a different card different from the match card is inserted into the card slit, or even the match card is inserted back and forth, or Of course, when a thin iron plate or the like is inserted with the aim of shearing the magnet pin, the card lock is not unlocked.

  On the other hand, in any card lock, when an iron plate or the like is strongly pushed into the card slit, the strong torsion coil spring is used in the card lock described in Patent Document 1, and the push spring 27 is used in the card lock described in claim 2. However, the force for pushing the different card into the card slit is not transmitted to the magnet pin.

  However, since the strong torsion coil spring or the push spring 27 has a considerably large elasticity, there is still room for improvement such as the spring elastic limit may be exceeded by repeatedly applying a strong external force to these springs and the spring may be bent. is there.

  Accordingly, an object of the present invention is to provide a breakage prevention mechanism that can eliminate spring sag by deforming a push spring or the like of a card lock.

  In order to achieve the above object, the invention described in claim 1 is a card slit fixed to a base frame and into which a key card is inserted during unlocking operation, a fixed block fixed to the base frame, and the fixed block. On the other hand, a movable block that is guided so as to be relatively movable in the width direction of the key card inserted in the card slit, is locked to this fixed block via a tumbler at the time of locking, and is always urged in the direction of the locking position; The L-shaped lever body is pivotally supported by a fixed block in the vicinity of the inner end of the card slit, one end is an insertion end of a key card inserted into the card slit, and the other end is a movable flock. Each has a release lever that can be engaged, and when the key card is inserted into the card slit, the lock by the tumbler is released and the movable block is free with respect to the fixed block. In the card lock that, fixedly Ward pins at the back of the card slit, and correspondingly, Ward pin insertion end of the key card, characterized in that the formation of the notches to be engaged entering.

  The damage preventing mechanism according to the first aspect of the present invention configured as described above is such that when the card is inserted into the card slit, the ward pin is engaged with the cutout of the card and does not interfere with the card. Does not interfere with the operation of the.

  On the other hand, when the iron plate is inserted into the card slit for the purpose of unauthorized unlocking or by mistaken operation, or the combined card is reversed, since the insertion end is in contact with the ward pin and further movement is restricted, An excessive external force does not act on the release lever, and therefore, it is possible to prevent the damage of the internal mechanism of the card lock or the plastic deformation of the spring member.

  An iron plate for the purpose of erroneous operation or unauthorized unlocking with a simple configuration in which a ward pin is fixed to the back of the card slit and a notch into which the ward pin is engaged is formed at the insertion end of the key card. It was possible to prevent damage to the internal mechanism of the card lock or plastic deformation of the spring member due to insertion of the card.

A first embodiment of the present invention will be described below with reference to FIGS.
The card lock shown in these figures has the same operating principle as that shown in FIGS. 1 to 3, but the mechanism is slightly different. The key card 1 and the lock card 2 shown in FIG. However, since the difference in the structure of the card lock is not the gist of the present invention, further detailed explanation is omitted.

  6 to 9, reference numeral 34 denotes a ward pin. The ward pin 34 is fixed to the back of the card slit 35 (see FIGS. 8 and 9).

  In the illustrated embodiment, the ward pin 34 is fixed to the ceiling plate of the card slit 35 by caulking.

  Corresponding to the ward pin 34, as shown in FIG. 7, a notch 36 into which the ward pin 34 can be engaged is formed at the insertion end of the key card 4.

  The depth of the notch 36, in other words, the vertical dimension of the notch 36 in FIG. 7 is such that when the ward pin 34 engages with the notch 36 and contacts the bottom as shown in FIG. The insertion edge of the card 4 is set so that the release mechanism 29 can be pushed to control the locking mechanism.

  The damage prevention mechanism according to the first embodiment of the present invention configured as described above unlocks the card lock when a regular key card is inserted into the card slit in the correct direction as shown in FIG. And the locking mechanism can be controlled.

  On the other hand, as shown in FIG. 6, when a regular key card is inserted into the card slit in the reverse direction, or when an iron plate is inserted, the card or the card-like plate-like body is stopped by the ward pin 34, Since the force for further pushing the card or the card-like plate-like body is carried by the fixed block of the card lock via the ward pin 34, the functional block of the card lock and the spring member are not damaged.

  FIGS. 10 to 12 show a second embodiment of the present invention, which is an application of the present invention to the card lock shown in FIGS.

  In the second embodiment, reference numeral 34 denotes a ward pin, which is fixed to the back of the ward pin 34 card slit 35.

  In the illustrated embodiment, the ward pin 34 is fixed to the plate-like reference member 18 (see FIGS. 4 and 5) by caulking.

  Corresponding to the ward pin 34, as shown in FIG. 10, a notch 36 into which the ward pin 34 can be engaged is formed at the insertion end of the key card 4.

  Since the damage preventing mechanism according to the second embodiment configured as described above is the same as the damage preventing mechanism according to the first embodiment, further detailed description is omitted.

The external appearance perspective view which expands and shows the structural member of the conventional composite card lock. It is sectional drawing by the plane perpendicular | vertical to the key card insertion direction, and shows the case where a key card is a joint card. It is sectional drawing by the plane perpendicular | vertical to the key card insertion direction, and the case where a key card is a different card | curd is shown. The top view of the conventional magnet card lock. Sectional drawing by the plane parallel to the key card insertion direction. It is a top view of the compound card lock to which this invention is applied, and shows a case where a different card is inserted into a card slit. It is a top view of the compound card lock to which this invention is applied, and shows the case where a joint card is inserted into a card slit. Sectional drawing by the plane parallel to the key card insertion direction of the composite card lock to which this invention is applied. Sectional drawing by the plane perpendicular | vertical to the key card insertion direction of the composite card lock to which this invention is applied. The top view of the magnetic card lock to which this invention is applied. Sectional drawing by the plane parallel to the key card insertion direction. Sectional drawing by another plane parallel to the key card insertion direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engagement hole 2 Lock card 3 Inner card slit 4 Key card 5 Outer card slit 6 Lock box 7 Tumbler slit 8 Fixed block 9 Detection protrusion 11 Oscillation tumbler 12 Escape slit 13 Through groove 14 Movable block 15 Tumbler pin 16 Driver pin 17 First Pin Hole 18 Reference Member 19 Second Pin Hole 21 Moving Member 22 Magnetic Pin 23 Card Insertion Path 24 Base Frame 25 Return Spring 26 Transmission Lever 27 Push Spring 28 Release Lever Shaft 29 Release Lever 31 First Lever 32 Second Lever 33 3rd lever 34 Ward pin 35 Card slit 36 Notch

Claims (1)

  A card slit that is fixed to the base frame and into which the key card is inserted during unlocking operation, a fixed block that is fixed to the base frame, and a relative movement in the width direction of the key card inserted into the card slit with respect to this fixed block It is guided so that it can be locked to this fixed block via a tumbler during locking, and it is rotatably supported by a movable block that is always urged toward the locking position and a fixed block near the inner end of the card slit. A card body having an L-shaped lever body, one end at the insertion end of the key card inserted into the card slit and the other end at the other end that can be engaged with the movable block. When a key card is inserted in the card lock, the tumbler is unlocked and the movable block becomes free relative to the fixed block. Fixedly and down, and correspondingly, the card lock breakage prevention mechanism Ward pin insertion end of the key card, characterized in that the formation of the notches to be engaged entering.

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