JP2008095377A - Key hole shutter of cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surely operable key hole shutter for smoothly putting in and out a key. <P>SOLUTION: This key hole shutter has a pair of small rollers 1 and 1 energized to be mutually joined, and blocks up the front of a key hole by energizing these rollers to be mutually joined. A virtual rectangular shape of surrounding a cross section of a duplicate key body part 21 inserted into the key hole, is compared with a cross-sectional shape of the duplicated key body part. A part cut inside from one long side of the duplicate key body part is added in an outward overhang flange shape to a predetermined part of an outer peripheral part of the rollers corresponding to one long side. A groove 23 of the cross-sectional same shape is formed on the other roller so that the added part does not interfere, and is similarly formed even in the other long side of the virtual rectangular shape. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a keyhole shutter for a cylinder lock (hereinafter simply referred to as a keyhole shutter), and more particularly, to a keyhole shutter that operates reliably and can be smoothly inserted and removed.

  The present applicant has previously proposed a novel keyhole shutter with Patent Document 1 described later.

  Although no patent application was made, a keyhole shutter using a small pair of rollers shown in FIGS.

  In this keyhole shutter, as shown in FIG. 6, a pair of small rollers 1 and 1 are arranged in front of the keyhole opening of the cylinder lock so that these rollers 1 and 1 can move in the thickness direction of the key. In addition to guiding, the elastic force of the urging springs 2 and 2 by, for example, a small compression coil spring, both are joined together to close the front of the keyhole.

  At this time, since the pair of rollers 1 and 1 are joined along the generatrix and block the front of the keyhole, dust, moisture and the like do not enter the keyhole.

When inserting the key into a key hole (not shown) of the cylinder lock, the key tip is inserted into a space having a substantially triangular cross section formed between the pair of rollers 1 and 1, and the key tip is moved by the wedge action to the rollers 1 and 1. 7 is pushed open as shown in FIG. 7, the rollers 1 and 1 are pushed and spread so that the key can be inserted into a key hole (not shown).
Japanese Patent Application No. 2003-129706

  The keyhole shutter described in Patent Document 1 is pressed in the cylinder lock direction while bringing the key into contact with the shutter, and the shutter is rotated by a wedge action generated between the key and the shutter. In some cases, there is still room for improvement, such as the wedge action hardly occurring and the operation not necessarily smooth.

  Further, the keyhole shutter using the roller shown in FIGS. 6 and 5 is difficult to determine the position in the width direction of the key when inserting the key into the keyhole because the keyhole is hidden by the shutter. There is still room for improvement, for example, after the roller has been pushed up, the key must be moved along the generatrix of the roller and the key must be inserted into the keyhole.

  Accordingly, an object of the present invention is to provide a keyhole shutter that operates reliably and can be smoothly inserted and removed.

  In order to achieve the above object, the present invention provides a pair of small rollers in front of the keyhole of the cylinder lock, and moves the pair of small rollers so that the pair of small rollers can move in the thickness direction of the key inserted into the keyhole. In the normal state where the external force does not act on these members, the guide members are biased so that they are joined to each other, so that the front of the keyhole is closed. Compare the cross-sectional shape of the enclosing virtual rectangle and the key body part, and the part cut inward from one long side of the key body part becomes the predetermined part of the outer periphery of the roller corresponding to the one long side. Along with the flange shape projecting outward, a groove having the same cross-sectional shape is formed in the other roller so that the added portion does not interfere with the other long side of the virtual rectangle. And

  In the keyhole shutter according to the present invention configured as described above, one roller and the other roller are joined symmetrically with each other so that the protrusion of the flange lock and the groove for receiving it are engaged. Under normal conditions, the front of the keyhole is closed without a gap, so that dust and moisture can be prevented from entering the keyhole.

  On the other hand, when inserting the key into the key hole, one of the width direction of the key can be accurately set by matching the protrusion or groove of the roll with the cross-sectional shape of the key, so that the key can be removed smoothly and Various effects, such as being able to perform reliably, are produced.

  Compare the virtual rectangle surrounding the cross section of the key body part inserted into the key hole and the cross section shape of the key body part, and cut the part cut inward from one long side in the width direction of the key body part. Add to the predetermined part of the outer peripheral part of the roller corresponding to one long side in the form of a flange projecting outward, and form a groove having the same cross section in the other roller so that the added part does not interfere, Since the same is applied to the other long sides of the virtual rectangle, a keyhole shutter that operates reliably and smoothly can be configured.

An embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the cylinder lock 3 is usually attached to the lock box 5 via a cylinder cylinder 4.

  The cylinder cylinder 4 is a cup-shaped member in which, for example, a pair of connecting pieces 6, 6 is provided on the outer side of the opening edge, and each connecting piece 6 is formed with an attachment hole 7 penetrating horizontally. .

  The cylinder lock 3 was stored in a state where the key guide of the inner cylinder 11 was seen through the inner cylinder insertion hole 9 opened in the outer plate 8 (bottom plate of the cup) of the cylinder cylinder, and the retaining ring 12 was used to prevent the cylinder lock 3 from coming off. The cylinder cylinder 3 is projected outside through the side surface of the lock box 5 and the door 13.

  Further, in FIG. 1, reference numeral 14 denotes a decorative ring having a perforated trapezoidal appearance, and this decorative ring 14 is usually formed by the elasticity of a ring spring 15 as a compression coil spring wound around the outer peripheral portion of the cylinder tube. The opening base is mounted so as to be pressed against the outer surface of the door 13.

  On the other hand, a holder 16 is mounted integrally with the outer plate 8 on the outer side (toward the left side) of the outer plate 8 of the cylinder cylinder 4.

  As shown in FIGS. 1 and 2, the outer plate 8 has a thick disk shape as a whole, and a lower ring portion 17 (see FIG. 2) on the outer surface (the left surface in FIG. 1) outer peripheral portion. Is formed.

  Although not shown, short pins (not shown), for example, are planted at a plurality of locations on the surface of the outer plate 8, while engagement holes (not shown) that engage with the pins are provided on the back surface of the holder 16. It is assumed that the holder is prevented from rotating by the engagement between the engagement hole and the pin.

  Further, on the outer surface of the holder 16 is formed a concave portion 18 having a roughly horizontal shape, and the space between the concave portion 18 and the circular front plate of the presser cylinder 20 (see FIG. 1) is the rollers 1, 1. It is secured as a guide part.

  Furthermore, as shown in FIGS. 2 and 3, a horizontally-long rectangular first key insertion hole 19 is opened at the center of the front plate of the presser tube 20, and the key 21 is inserted through the key insertion hole 19. It is assumed that the roller 1 is inserted between the rollers 1 and 1 (see FIG. 1).

  As will be described later, a horizontally long second key insertion hole 22 (FIG. 1) is formed on the inner surface side of the holder so that the key 21 that has pushed the rollers 1 and 1 up and down and entered in the keyhole direction does not interfere with the inner surface of the holder. And FIG. 3) are open.

  The rollers 1 and 1 are urged in the direction to be joined to each other by the elastic force of the urging springs 2 and 2 in the same manner as shown in FIGS.

  On the other hand, as shown in FIG. 2 and FIG. 3, the virtual rectangle surrounding the cross section of the main body portion of the key 21 inserted into the key hole is compared with the cross section shape of the key main body, and the width direction of the key main body The outer periphery of the roller corresponding to the one long side (the upper roller in FIG. 3) is a portion cut inwardly from one long side (the upper side in FIG. 3) (a groove having a substantially V-shaped cross section in FIG. 3). It is added to a predetermined part of the part (in FIG. 3, a part aligned with the V-shaped groove in the length direction of the roller 1) in a flange shape projecting outward.

  Correspondingly, a groove 23 having the same cross-sectional shape is formed on the other roller so that the added flange lock portion does not interfere.

  On the other hand, the same applies to the grooves formed on the lower surface in FIG.

  In the normal state where the external force does not act on the rollers 1 and 1 as shown in FIG. 2, the keyhole shutter according to the embodiment of the present invention configured as described above is engaged with the flange and the groove without any gap as shown in FIG. The other parts are joined together with the busbars, so the front surface of the keyhole is closed to prevent intrusion of dust and moisture.

  On the other hand, when inserting the key 21 between the rollers 1 and 1, the key key is naturally inserted so that the groove of the key is aligned with the flange. The key is inserted and removed smoothly.

  Further, as shown in FIG. 3, it is possible to push the rollers 1 and 1 up and down to allow the key to enter while engaging the key groove and the protrusion on the flange of the roller. This is the same as the conventional keyhole shutter shown in FIG.

  The illustrated embodiment corresponds to a cylinder lock of the type in which the long side of the cross-sectional shape of the key is horizontal and is inserted into the key hole.

  However, depending on the type of cylinder lock, the long side may be vertical and the key may be inserted into the keyhole. In this case, the rollers 1 and 1 are vertical.

  4 and 5 show another embodiment of the present invention. In this embodiment, the present invention is applied to another cross-sectional shape (so-called ward) of the key shown in FIG.

  That is, as shown in FIG. 4, the cross-sectional shape of the hatched joint key body part is compared with the virtual horizontally long rectangle surrounding the hatched transverse section of the joint key body part inserted into the keyhole, Flange projecting outwardly from portions a and b cut inward from one long side in the width direction of the main body to a predetermined portion of the outer peripheral portion of the upper roller 1 in FIG. 5 corresponding to the one long side Add as a and b.

  On the other hand, a groove 23 having the same cross section is formed on the other roller (lower roller) so that the added portions a and b do not interfere with each other.

  On the other hand, a portion c cut inward from the other long side of the imaginary rectangle in FIG. 4 is added as a flange c projecting outward to a predetermined portion of the outer peripheral portion of the lower roller 1, correspondingly, Grooves 23 are formed in corresponding portions of the upper roller.

The longitudinal cross-sectional view of the cylinder lock | rock with which the keyhole shutter by one Example of this invention was mounted | worn. The front view showing the presser cylinder is shown with the shutter closed. It is the front view which removes and shows a press cylinder, and shows the state where the shutter opened. Sectional drawing of the key which shows the other Example of this invention. The corner | angular 1st front view of the roller which shows the other Example of this invention. The front view similar to FIG. 2 which shows an example of the conventional keyhole shutter. The front view similar to FIG. 3 which shows an example of the conventional keyhole shutter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller 2 Energizing splash 3 Cylinder lock 4 Cylinder cylinder 5 Lock box 6 Connection piece 7 Connection hole 8 Outer plate 9 Inner cylinder insertion hole 11 Inner cylinder 16 Holder 17 Ring portion 18 Recessed part 19 1st key insertion hole 20 Presser Tube 21 Combined key 22 Second combined key insertion hole 23 Groove

Claims (1)

  In a normal state in which a pair of small rollers are arranged in front of the keyhole of the cylinder lock, and the pair of small rollers are guided so that they can move in the thickness direction of the key inserted into the keyhole, and no external force acts on them. An imaginary rectangle enclosing the cross section of the key body portion inserted into the key hole and the cross section of the key body portion, which are energized so as to be joined to each other, thereby closing the front of the key hole Compare the shape and add the part cut inward from one long side of the key body part to the flange shape protruding outward to the predetermined part of the outer peripheral part of the roller corresponding to one long side A keyhole shutter for a cylinder lock, wherein a groove having the same cross-sectional shape is formed in the other roller so that the added portion does not interfere, and the same is applied to the other long sides of the virtual rectangle.