JP2005200939A - Keyhole protection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyhole protection device capable of preventing the dust from getting into a keyhole and preventing an unjustified tool from being inserted for unlocking purposes. <P>SOLUTION: The keyhole protection device 1 has a fixed plate section 2 mounted on the surface 4a of a plate body 4 wherein the keyhole is formed and a movable plate section 3 mounted to the fixed plate section 2 through a hinge 6 in an openable manner. A through-hole 7 leading to the keyhole is formed in the fixed plate section 2, and the movable plate section 3 is so made that the through-hole 7 can be covered to cover the keyhole when it is closed. The fixed plate section 2 and the movable plate section 3 become a locking state by engaging a latch provided to one of these two sections 2 and 3 with a latch approach section provided to the other section in a releasable manner. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a keyhole protection device capable of protecting a keyhole formed on a surface of a plate-like body such as a wall surface or a door from intrusion of dust.

Conventionally, it is well known to attach a shielding member that can normally close the keyhole to the keyhole to protect the keyhole from intrusion of dust or the like. For example, a cylinder lock waterproof device described in Japanese Utility Model Publication No. 38-22785 (Patent Document 1) has a rubber shutter for shielding a keyhole. Further, the keyhole opening and closing encoder described in Japanese Utility Model Publication No. 35-14392 (Patent Document 2) is formed on each disk by rotating a plurality of disks that normally shield the keyhole. The key can be inserted into the keyhole only when the key insertion holes are aligned.
Japanese Utility Model Publication No. 38-22785 Japanese Utility Model Publication No. 35-14392

  Although the device described in Patent Document 1 can prevent intrusion of dust and the like by a rubber shutter, it cannot prevent insertion of a key or a tool that attempts to unlock the locking device illegally. Moreover, although the encoder described in Patent Document 2 can prevent an unauthorized operation on the keyhole, it takes time and effort to shield the keyhole by rotating the disk again after removing the key from the keyhole. .

  SUMMARY OF THE INVENTION An object of the present invention is to provide a keyhole protection device that can prevent dust from entering a keyhole in a locking device and prevent unauthorized tools from being inserted, and that does not require time and effort for operation.

  In order to solve the above-described problems, the present invention is directed to a keyhole formed on the surface of a plate-like body that can be attached to the surface that shields the keyhole from the outside of the keyhole so that the keyhole can be opened and closed and protects against dust intrusion It is a keyhole protection device.

  The present invention is characterized in that such a keyhole protection device has a through hole that communicates with the keyhole, and can be fixed to the surface by a fixing plate portion, and can be turned with respect to the fixing plate portion via a hinge. The fixed plate comprises a movable plate part that is attached and opened and closed, and that covers the through-hole when it is closed to shield the keyhole and prevent the key and the dust from entering the keyhole. The movable plate portion and the movable plate portion are formed so as to be locked when a latch means provided in one of the two portions retreats into a latch entry portion provided in the other portion. The means comprises a plurality of latches arranged in parallel, and each of the plurality of latches is biased in the direction of entry into the latch entry portion independently of each other by individual spring means; A.

  In one embodiment of the present invention, each of the plurality of latches is provided in the fixed plate portion, and each retreat from the entered latch entry portion can be performed by an individual operation from the outside of the fixed plate portion. It is.

  In another embodiment of the present invention, the fixed plate portion has a raised portion toward the movable plate portion in a closed state around the through hole, and the movable plate portion is A portion facing the raised portion is formed of an elastic material.

  According to the first aspect of the present invention, the keyhole protection device includes the fixed plate portion and the movable plate portion, and these portions are locked when the latch enters the latch entry portion. By being shielded by the portion, it is not only protected from the ingress of dust, but the key cannot be inserted unless the movable plate portion in the locked state is opened in the unlocked state. The opened movable plate part can be closed simply by swiveling it. Such a keyhole protection device according to the present invention can not only prevent the intrusion of dust into the keyhole, but also prevent the unauthorized insertion of the unlocking tool, and can also provide a fixed plate portion and a movable plate portion. It takes less time to lock.

  According to the invention which concerns on Claim 2, operation for unlocking a movable plate part is attained from the outer side of a fixed plate part.

  According to the invention of claim 3, when the movable plate portion is in a closed state with respect to the fixed plate portion, the raised portion around the through hole of the fixed plate portion and the portion formed of the elastic material of the movable plate portion The keyhole is protected not only from the ingress of dust but also from the ingress of raindrops.

  The details of the keyhole protecting device according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a diagram illustrating a usage state of the keyhole protection device 1. The device 1 has a fixed plate portion 2 and a movable plate portion 3, and the fixed plate portion 2 is fixed to the surface 4a of the plate-like door 4 by a screw 8 via a rubber sheet 69 as a cushion pad, and is movable. The plate portion 3 is attached to the fixed plate portion 2 via the hinge 6 so as to be openable and closable. In the figure, the movable plate portion 3 is in an open state and can be closed by turning in the arrow A direction. A through hole 7 is formed in the fixed plate portion 2, and the through hole 7 communicates with a key hole 11 (see FIG. 2) of a latch lock 71 (see FIG. 6) attached to the door 4. By inserting a key (not shown) for locking / unlocking the latch lock 71 into the key hole 11 formed in the surface 4a of the door 4 from the through hole 7, the door 4 locked to the fixed frame 5 is obtained. Can be opened.

  2, 3, and 4 are a plan view of the apparatus 1 in the state of FIG. 1 and a view taken along arrows III-III and IV-IV in FIG. 2. The fixed plate portion 2 has a top surface portion 2a, a bottom surface portion 2b, and a peripheral wall portion 2c. In the top surface portion 2a, holes 9 for inserting screws 8 to the left and right of the through-hole 7 communicating with a key hole 11 indicated by a virtual line. A raised portion 12 is formed around the through hole 7 and the hole 9, and a rectangular opening 13 is formed in the lower portion. Inside the opening 13, for example, latch means having a plurality of latches including a first latch 15 and a second latch 16 in the illustrated example has advanced. Each of the first and second latches 15 and 16 is individually biased downward by the first spring means 43 and the second spring means 44 (see FIG. 5) in the downward direction of the figure, and resists the bias. Thus, each can be moved upward in the figure so as to retreat individually from the opening 13. A pair of left and right circular recesses 23 are formed between the raised portion 12 and the opening 13 in the vertical direction of FIG. Each side part of the fixed plate part 2 has a curved part 19 for avoiding a fingertip from hitting when the movable plate part 3 is opened. As shown in FIG. 3, the fixing plate portion 2 is a first that can move the first and second latches 15 and 16 upward in FIG. 2 to the peripheral wall portion 2 c having a height H. And second push button portions 21 and 22.

  The movable plate portion 3 is formed with the outer shape substantially the same as that of the fixed plate portion 2 in FIG. 2, and when the movable plate portion 3 is turned and closed in the direction of arrow A shown in FIGS. It has an inner surface 3a facing the top surface 2a and an outer surface 3b which is the opposite surface of the inner surface 3a. On the inner surface 3a, an elastically deforming portion 31 having a shape in which a part of a circle is cut out, a latch entry portion 32, and a pair of left and right cylindrical protrusions 33 are formed. The elastic deformation portion 31 is formed by sticking a sheet-like elastic material made of natural rubber, plastic elastomer or the like to the inner surface 3a. When the movable plate portion 2 is closed, the elastic deformation portion 31 is pressed against the raised portion 12 of the fixed plate portion 2. And the circumference | surroundings of the through-hole 7 can be closed in a watertight state. The latch entry portion 32 is formed with a through-hole 34 through which each of the first and second latches 15 and 16 can enter and retract individually (see FIGS. 1 and 6). Each of the columnar projections 33 enters each of the pair of recesses 23 formed in the fixed plate portion 2 when the movable plate portion 3 is closed.

  FIG. 5 is a diagram showing an internal structure of the lower end portion of the fixed plate portion 2 surrounded by a chain line B in FIG. The fixed plate portion 2 is formed with a slide piece guide chamber 40 that is symmetrical with respect to a center line C that bisects the width of the fixed plate portion 2. In the guide chamber 40, a first slide piece 41 and a second slide piece 42 which are symmetrical with respect to the center line C are housed, and each of the first and second slide pieces 41, 42 is composed of, for example, a coil spring shown in the figure. The first spring means 43 and the second spring means 44 are individually urged downward in the figure. The guide chamber 40 has first and second openings formed in the peripheral wall portion 2c of the fixed plate portion 2 so as to be arranged on the left and right via a partition wall 46 (see also FIG. 4) located on the center line C. 47 and 48 and first and second slide walls 51 and 52 parallel to the center line C. The first and second slide pieces 41 and 42 have a center line C with respect to the first and second slide portions 53 and 54 and the first and second slide walls 51 and 52 slidable with each other along the center line C. 3rd and 4th slide parts 57 and 58 which can be slid in parallel. The first and second slide portions 53 and 54 are formed with first and second latches 15 and 16, respectively. The third and fourth slide portions 57 and 58 have first and second openings 47 and 48, respectively. First and second push button portions 21 and 22 are formed. In the first and second slide pieces 41 and 42 pressed by the first and second spring means 43 and 44, the first and second latches 15 and 16 advance into the opening 13 of the fixed plate portion 2 (see FIG. 2). ), The lower end surfaces of the first and second push button portions 21 and 22 form substantially the same surface as the peripheral wall portion 2 c in the first and second openings 21 and 22 of the fixed plate portion 2.

  FIG. 6 is a view showing a cut surface along the line VI-VI in FIG. 2, and the movable plate portion 3 is closed with respect to the fixed plate portion 2 and attached to the door 4 and the door 4. The latch lock 71 is indicated by a virtual line. When the movable plate portion 3 is pivoted in the direction of arrow A and closed, the inclined portions 15a and 16a (see FIG. 2) of the first and second latches 15 and 16 in which the latch entry portion 32 is in the state shown in FIG. By pressing, the first and second latches 15 and 16 are retracted from the opening 13 against the biasing of the first and second spring means 43 and 44. When the movable plate portion 3 is completely closed, the first and second latches 15 and 16 are automatically moved by the biasing action of the first and second spring means 43 and 44 into the through hole 34 of the latch entry portion 32 that is accommodated in the opening 13. The fixed plate portion 2 and the movable plate portion 3 are locked by the engagement of the first and second latches 15 and 16 and the latch entry portion 32, and the raised portion 12 of the fixed plate portion 2 is movable. The elastic deformation part 31 of the plate part 3 is maintained in a pressure contact state. When the movable plate portion 3 is closed, each of the pair of columnar protrusions 33 enters each of the pair of concave portions 23 of the fixed plate portion 2. A spring 61 and a plate-like chip 62 biased by the spring 61 are incorporated in the recess 23, and the protrusion 33 entering the recess 23 stores the spring 61 via the plate-like chip 62. The movable plate portion 3 is biased in the opening direction.

  In the device 1 in which the movable plate 3 is closed in such a state, a key (not shown) cannot be inserted into the key hole 11 unless the movable plate portion 3 is opened. The closed movable plate portion 3 has a bifurcated tip portion 67 of the key 66 indicated by the phantom line in FIG. 5 in the first and second push button portions 21 and 22 in the first and second slide pieces 41 and 42. When pressed against each other, the first and second slide pieces 41 and 42 simultaneously slide upward in the drawing inside the guide chamber 40, and the first and second latches 15 and 16 enter the latch of the movable plate portion 3. Retreating from the portion 32, the engagement between the first and second latches 15 and 16 and the latch entry portion 32 is released, and the fixed plate portion 2 and the movable plate portion 3 are unlocked. At the same time, the movable plate portion 3 in which the cylindrical protrusion 33 is pressed by the spring 61 slightly pivots in the direction opposite to the arrow A direction to create a gap between the movable plate portion 2 and the movable plate portion 2. It becomes easy to pick the part 3 with a fingertip. Since the first and second latches 15 and 16 slide individually, the first and second latches 15 and 16 can be retracted together from the latch entry portion 32 when the movable plate portion 3 is opened. Necessary, even if only one of the first and second latches 15 and 16 is retracted, the movable plate portion 3 cannot be opened. The movable plate portion 3 can be stopped at any angle within a range in which the movable plate portion 3 can be rotated by about 180 ° by the action of the coil spring 76 and the ball 77 incorporated between the movable plate portion 3 and the fixed plate portion 2.

  In FIG. 6, the latch lock 71 attached to the inside of the door 4 is an example of an object to be used for the keyhole protection device 1, and is a key in which the rotating member 72 in which the keyhole 11 is formed is inserted into the keyhole 11. When rotated by (not shown), the latch member 73 enters / retreats with respect to a predetermined portion of the fixed frame 5 shown in FIG. The door 4 is locked or unlocked with respect to the fixed frame 5 by the entry / retreat of the latch member 73.

  In the present invention, the first and second latches 15 and 16 in the illustrated example are provided not on the fixed plate portion 2 but on the movable plate portion 3, and the latch entry portion 32 is provided on the fixed plate portion 2 instead of the movable plate portion 3. You can also. Further, the illustrated latch means including the first and second latches 15 and 16 can further increase the number of latches.

  According to the present invention, it is possible to make a keyhole protection device that can prevent the entry of dust into the keyhole and at the same time can prevent unauthorized insertion of the tool and can be easily operated.

The perspective view of the keyhole protection apparatus in use condition. The top view of a keyhole protection apparatus. The III-III arrow directional view of FIG. FIG. 4 is a view taken along line IV-IV in FIG. 2. FIG. 3 is a partially cutaway view of FIG. 2. FIG. 6 is a view taken along line VI-VI in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Keyhole protective device 2 Fixed plate part 3 Movable plate part 4 Plate body (door)
4a Surface 6 Hinge 7 Through-hole 11 Keyhole 12 Raised portion 15 Latch 16 Latch 31 Elastic material (elastically deformed portion)
32 Latch entry part 43 Spring means 44 Spring means

Claims (3)

A keyhole protection device attachable to the surface that shields the keyhole formed on the surface of the plate-like body from the outside of the keyhole so that the keyhole can be opened and closed, and protects against the intrusion of dust,
A through hole communicating with the key hole, and a fixed plate portion that can be fixed to the surface, and is pivotably attached to the fixed plate portion via a hinge, opens and closes, and covers the through hole when closed. A movable plate portion that shields the keyhole to prevent the key from entering the keyhole and the dust from entering,
The fixed plate portion and the movable plate portion are formed so as to be locked when a latch means provided in one of these two portions retreats into a latch entry portion provided in the other portion. ,
The keyhole characterized in that the latch means comprises a plurality of latches arranged in parallel, and each of the plurality of latches is urged in an entry direction to the latch entry portion independently of each other by individual spring means. Protective device.   2. The keyhole protection device according to claim 1, wherein each of the plurality of latches is provided in the fixed plate portion, and the retreat from the entered latch entry portion is possible by an individual operation from the outside of the fixed plate portion. .   The fixed plate portion has a raised portion that can be pressed against the movable plate portion in a closed state around the through-hole, and the movable plate portion is formed of an elastic material at a portion facing the raised portion. The keyhole protection device according to claim 1 or 2.

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