JPH084374A - Protective cover device for keyhole - Google Patents

Abstract

PURPOSE:To prevent the opening of a door so far as a user has both a master card and a cylindrical key by obviating exposure to the outdoor side of a keyhole and sealing the keyhole by a cover member. CONSTITUTION:When a specified master card is inserted into a card inserting path 18 for releasing a lock from a locked state, in which the closing state of a cover member 2 is constrained by a latch body 3, one ends of magnetic pins 45 constraining a moving member 41 against a cover body 1 by the magnetic force of the pins 45 are conformed to shear lines, and movement is permitted. The moving member 41 is pushed and moved to an upper section directly or through a receiving spring 48 by the front end of the master card, and the latch body 3 engaged with the engaging piece 21 of the cover member 2 at a closed place is slid to an open place against the force of a return spring 31. Accordingly, a constrained state to the engaging piece 21 is released, and the cover body 2 can be opened by a hand and/or an opening spring 8. A key is inserted into the keyhole of the lock device of a door 10 and the lock device is released when the cover member 2 is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyhole protective cover device developed to prevent a lock device provided on a door from being illegally unlocked by a duplicated key or picking.

[0002]

2. Description of the Related Art Since a bar-shaped key for locking and unlocking a door locking device has become very easy to copy in recent years, when a resident or other user in a room changes, the door locking device can be locked. If the cylinder lock or the like is left as it is without being replaced, there is a concern that the duplicated key may unlock the lock device. Further, in a lock device using a cylinder lock, there is a concern that it may be picked through a key hole.

[0003]

SUMMARY OF THE INVENTION The protective cover for a keyhole according to the present invention prevents the keyhole of the lock device in the door from being exposed so that the door cannot be unlocked illegally only by a maliciously duplicated key. , Is provided for the purpose of preventing unauthorized unlocking due to picking of a simple rod-shaped tool.

[0004]

According to a first aspect of the present invention, there is provided a protective cover device for a keyhole, which comprises a cover main body fixed to the outside of the door so as to surround the keyhole of the door; and an internal space of the cover main body. A lid member pivotally attached to the cover body so as to open or close; a locking piece provided on the open end side in the lid member; when closed at a portion inside the cover body facing the open end side of the lid member A latch body provided so as to be able to slide and guide between a closed position and an open position for restraining or releasing the restraint of the lid member and selectively engaging with the locking piece when the lid member is locked. A return spring provided in the cover body for urging the latch body toward the closed position; provided in the cover body and selectively restrained or released from the cover body by an arbitrary number of magnetic pins A magnetic card lock having a moving member that moves; -By inserting the main body into the card insertion path, the magnetic force of the magnetizing part that contains the magnetic pin when the moving member is restrained is adjusted to the shear line, and then the latch is moved from the closed position to the open position via the moving member. And a combination card that is displaced toward.

According to a second aspect of the present invention, in the protective cover device for a keyhole according to the first aspect, the tip of the combined card inserted into the card insertion passage of the cover body is brought into contact with the moving member prior to the contact. For this purpose, a push spring having a greater elasticity than the return spring is provided so as to face the tip of the insertion card with respect to the moving member in the cover body, and a different card or a strong thin plate is inserted into the card insertion passage. At this time, the front end of the stop piece, which is slidably guided along the sliding direction of the moving member in the card insertion passage, is brought into contact with a part of the cover body, and the depth of pushing the stop piece by a different card or a tough thin plate Is characterized in that

[0006]

1 to 3 show a locking mode in which the cover member 2 is closed with respect to the cover body 1 and the closed state of the cover member 2 is restrained by the latch body 3.

In order to unlock the lid member 2, a predetermined combination card 5 (a card which can activate a specific magnetic card lock) shown in FIGS. 7 and 8 is inserted into the card insertion passage 18 along the insertion direction A. Plug in.

When the combined card 5 is inserted, the combined card 5
The magnetic pin 45 that restrains the moving member 41 with respect to the cover body 1 by the repulsive force or the magnetic force as the attracting force exhibited by the magnetized portion 51 of the magnet has one end of the shear line (cover body 1).
And the opposing contact surface of the moving member 41),
The restraint of the moving member 41 is released, and the moving member 41 is allowed to move.

Here, the moving member 41 is pushed upward at the tip of the combination card 5 directly or via the receiving spring 48, for example, in FIG. 6 or FIGS. 1 to 3, and is in the closed position. The latch body 3 engaged with the locking piece 21 of the lid member 2 is slid to the open position against the return spring 31.

The sliding displacement of the latch body 3 releases the restrained state of the lid member 2 with respect to the locking piece 21, so that the lid member 2 is moved by the hand and / or the opening spring 8 as shown by an arrow B in FIG. It will be a place where you can open it. When the lid member 2 is opened, a key is inserted into the key hole 30 of the lock device of the door 10 to unlock the lock device.

After the lid member 2 is opened, if the combined card 5 is pulled out from the card insertion passage 18, all the members displaced in the unlocking operation of the lid member 2 are in their original positions (see FIGS. 2 and 2). (The position shown in 6) is automatically restored.

In order to lock the locking device of the door 10 and the protective cover device of the present invention, the procedure of the above operation may be carried out substantially in reverse. However, in the case where the latch body 3 has the inclined surface 33 as in the case of the embodiment, when the lid member 2 is closed with respect to the cover body 1, the locking piece 21 of the latch member 3 holds the latch body 3. Since it automatically operates and engages with the latch body 3, it is not necessary to insert the combination card 5.

In the protective cover device (invention according to claim 2) in which the push spring 6 having a greater elasticity than the return spring 31 and the stop piece 7 attached thereto are present, a different card (a specific magnet card) is used. (A card that cannot operate the magnetic pin in the lock) or a strong thin plate such as an iron plate is inserted, the moving member 41 that is held in the restrained state by the magnetic pin 45 does not slide and displace, but is pushed by a different card or thin plate. Most of the pressure is released by the push spring 6,
Finally, since it is rigidly received by the part 16 of the cover body 1 via the stop piece 7, a large shearing force does not act on the magnetic pin 45, which is relatively weak in strength, and the magnetic pin 45 is magnetic. It is assumed that the unlocking of the lid member 2 due to the breakage of the pin 45 can be prevented.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 to 5, reference numeral 10 is a door, a sliding door or other type of door, 20 is a cylinder lock which is a part of a locking device attached to the door 10, and 30 is a cylinder lock 2
Keyholes such as 0 are shown.

The cover body 1 in the protective cover for a keyhole according to the present invention is, for example, formed in an elongated box shape,
The key hole 30 of the door 10 is surrounded and fixed to the outdoor side of the door 10 with a mounting screw 91 or the like.

Reference numeral 11 is a screw hole provided in the bottom of the box-shaped cover body 1, and reference numeral 12 is an opening provided in the bottom of the cover body 1 for exposing the key hole 30 in the internal space 13 of the cover body 1.

A cover member 2 for opening or closing the internal space 13 is provided on the front surface of the cover body 1. The lid member 2 is pivotally attached to the cover body 1 by a pivot 15 directly or via a support member 14 fixed by a screw 92 so that it can be opened and closed with respect to the cover body 1 in the direction of arrow B in FIG. There is. Reference numeral 15a is a retaining ring for the pivot 15.

On the open end side of the inside of the lid member 2, a locking piece 21 having an arbitrary shape such as a gate shape is integrally or separately provided, and the locking piece 21 has a latch body 3 described later.
Selectively engage.

The latch body 3 is formed, for example, in a square shape in the front surface, and is mounted so as to be slidably guided to a portion inside the cover body 1 facing the open end side of the lid member 2. The latch body 3 locks the lid member 2 at the time of locking with the locking piece 2
In order to restrain or release the restraint by engaging with 1, it is possible to displace between the closed position and the open position (vertical direction in FIG. 2), and it is provided in the cover body 1. It is urged toward the closed position (the position shown in FIG. 2) by a compression spring or other return spring 31.

Reference numeral 33 is an inclined surface for automatic engagement provided in the engaging portion 32 of the latch body 3, and 16 is a part of the cover body 1 provided for displaceably fitting the square-shaped latch body 3. A partition wall, 17 is a support column that is a part of the cover body 1 provided to support the latch body 3 from the back side.

Next, the magnetic card lock 4 provided inside the cover body 1 will be described. The basic structure and function of the magnetic card lock are shown in, for example, Japanese Patent Application Laid-Open No. 1-154982, and are conventionally known. Therefore, the magnetic card lock will be briefly described here.

Reference numeral 18 is a card insertion passage provided so that the combined card 5 (see FIGS. 7 and 8) can be inserted into the cover body 1 in the card insertion direction A. Reference numeral 4a is a fixed reference which also serves as the cover body. A plurality of first pin holes provided on the inner flat plate surface of the member 1, 41 has a plurality of second pin holes 4b,
In the reference member 1, the moving members 42 and 43 mounted so as to be reciprocally slidable in the direction parallel to the card insertion direction A are combined with each other to form one moving member 41.
One plate-shaped member, 44 is two plate-shaped members 42 and 43 which are joined together.
The respective card insertion holes formed between the two are shown.

For example, when the moving member (41) is a single piece, it is not always necessary to provide the card fitting hole (44). When there is no card insertion hole, the combination card is inserted along one surface of the moving member (41).

As the set of the corresponding first pin hole 4a and second pin hole 4b, an arbitrary number of sets (16 sets in FIG. 2) selected from a plurality of sets (7 sets in FIG. 2) are magnetic. Insert the pin 45. The magnetic pin 45 is also called a magnet tumbler.

Then, the magnetic pin 45 is inserted into both pin holes 4
The relative movement of the moving member 41 with respect to the reference member 1 (cover body) is constrained or allowed depending on whether the moving member 41 is held across a and 4b or only one pin hole. become. The moving member 41 is usually arranged at a position where it comes into contact with the above-mentioned latch body 3.

As shown in FIGS. 7 and 8, a magnetized portion 51 made of a magnet or a magnet layer is embedded in the composite card 5.
The magnetizing portion 51 is of course required according to the arrangement and polarity of the magnetic pins 45.
A dummy piece can be embedded in the.

The combination card 5 of the illustrated example is provided with a plurality of uneven ridges 52 along the insertion direction thereof, and the card fitting hole 44 is provided with a ward 49 corresponding to the uneven ridges 52. is there.

When the combination card 5 as described above is inserted into the card insertion passage 18 and the card insertion hole 44 of the moving member 41, the magnetizing portion 51 allows the gap between the reference member 1 also serving as the cover body and the moving member 41. Since one end of the magnetic pin 45 existing over the line can be aligned with the shear line (the facing contact surface between the reference member 1 and the moving member 41), the constraint of the moving member 41 on the reference member 1 is released.

The magnetic pin 45 biases the cover body, that is, the first pin hole 4a of the reference member 1 toward the moving member 41 by the action of the pin spring 46 and / or gravity. When the moving member is mounted horizontally on the door in the cover body having another shape, the magnetic pin may be urged by gravity, and thus the pin spring (46) may be omitted. it can.

Referring to FIGS. 3 and 5, since the moving member 41 and the latch body 3 are assembled to the cover body 1 so as to be slidable at predetermined positions, the back plate 19 is stopped on the back side of the cover body 1. It is fixed by screws 93.

In the embodiment shown in FIGS. 1 to 5, the tip of the combination card 5 inserted into the card insertion passage 18 of the cover body 1 and the card insertion hole 44 of the moving member 41 is connected to the front edge 47 of the moving member 41. In order to make contact with the moving member 41 in the cover body 1 at the tip of the insertion card 5, a compression spring or other pressing spring 6 having a larger elasticity than the above-mentioned return spring 31 is made to come into contact with the moving member 41 in the cover body 1. It is provided so as to face each other.

That is, the push spring 6 is provided from the spring receiver 48 integrally provided on the front (back side) of the moving member 41 toward the front side so that the tips of the insertion card 5 face each other.

A stop piece 7 is slidably guided in the card insertion passage 18 along the sliding direction of the moving member 41 from the front side of the card insertion to the front side (back side).

The stop piece 7 is pushed by the front end of a different card or a tough thin plate (neither is shown), and may be movably mounted on the moving member 41 side as shown in the figure. However, it may be movably attached to the fixed member side such as the cover body 1.

When the stop piece 7 is pushed by a different card or a thin plate, the front end portion of the stop piece 7 is brought into contact with a part of the cover body 1, and the pushing depth of the stop piece 7 by the different card or the like is limited.

The part of the cover body 1 with which the front end portion of the stop piece 7 abuts may be integral with the cover body 1 such as the partition wall 16 or may be fixed to the cover body 1. It may be a body (not shown).

The stop piece 7, as shown in FIGS. 2 and 5,
It is preferable that the longitudinal section, that is, the front shape is formed in a U-shape, and the pushing spring 6 having a coil shape is assembled in the inner space thereof, but the pushing spring 6 and the stop piece 7 are arranged in the width direction of the moving member 41 ( It can also be provided at intervals in the left-right direction in FIG.

At the pivotally connecting portion between the cover body 1 and the cover member 2, a leaf spring, a torsion spring, or any other kind of spring for urging the cover member 2 in the opening direction at the initial stage of the opening angle or over the entire area. The opening spring 8 may be provided.

The opening spring 8 of the illustrated example has a U-shaped front shape (see FIG. 5), and projecting pieces 82, 82 forming a pair on both sides are formed so as to jump forward and upward. The opening spring 8 includes a base 81, an upper surface of the cover body 1, and a support member 14.
It is attached so as to be sandwiched between the lid member 2 and
When the latch body 3 is unlocked by the displacement of the latch body 3, the both side plates 22, 22 of the lid member 2 are automatically flipped up by the projecting pieces 82, 82 of the opening spring 8 to open the lid member 2.

Reference numeral 85 indicates an opening spring 8 when the lid member 2 is closed.
A fitting groove provided on the upper surface of the cover main body 1 in order to release each protruding piece 82, and a screw hole 83 provided in the base portion 81 for inserting a small screw (not shown) when fixing the opening spring 8
Reference numeral 4 denotes a protrusion provided on both sides of the base 81 of the opening spring 8 for holding the lid member 2 in the opened state by friction due to sliding contact, and 23 denotes the protrusion 84 at the initial stage of opening the lid member 2. Side plates 2 of the lid member 2 in order to release the friction of
The relief grooves provided in No. 2 are shown respectively.

As described above, in the case where the engaging portion 32 of the latch body 3 is provided with the inclined surface 33 for automatic engagement, when the lid member 2 in the open position is closed, the combined card 5 is not used. Also, since the locking piece 21 enters along the inclined surface 33 and is automatically engaged with the latch body 3 only by closing the lid member 2 by hand, it is easy to use. The inclined surface (33) is
It can also be provided on the locking piece 21 side of the lid member 2.

A screw 94 is attached to the back plate 19 of the cover body 1.
The magnet-sensitive reed switch 50 fixed by means is operated when the magnet piece 50a embedded in the locking piece 21 of the lid member 2 comes close to each other. The presence makes it possible to manage the closed state of the lid member 2 at a remote location.

In another embodiment shown in FIG. 6, in FIGS.
This embodiment is different from the embodiment shown in FIG. 5 only in that the push spring 6, the U-shaped stop piece 7 and the spring receiver 48 are omitted, and the other members are the same between the two. The detailed description of is omitted. In both examples, members indicated by the same reference numeral indicate that they are mutually effective members.

[0044]

According to the protective cover for a keyhole of the present invention described above, the keyhole of the lock device attached to the door is not exposed to the outside of the room and is sealed by the lid member. If you do not have both the card and the rod-shaped key, you cannot open the door, and the door cannot be unlocked only with a maliciously duplicated key.Unauthorized unlocking by picking with a simple rod-shaped tool Can be prevented, and when the user such as a resident of the room changes, the device of the present invention is added around the keyhole of the existing lock device without modifying the lock device already installed in the door. There are many effects such as being able to be mounted.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention with a lid member closed.

FIG. 2 is a partial vertical sectional front view showing a cover member removed.

FIG. 3 is a partial vertical sectional side view of the embodiment of FIG.

FIG. 4 is a bottom view thereof.

FIG. 5 is a reduced perspective view showing the embodiment of FIG. 1 in an exploded manner.

FIG. 6 is a partial vertical front view showing a lid member removed in another embodiment of the present invention.

FIG. 7 is a plan view of a combination card commonly used in two embodiments of the present invention.

FIG. 8 is a side view thereof.

[Explanation of symbols]

 10 door 30 keyhole 1 cover body 13 internal space 18 card insertion passageway 2 lid member 21 locking piece 3 latch body 31 return spring 4 magnet card lock 41 moving member 45 magnetic pin 5 mating card 51 magnetized portion 6 push spring 7 stop piece

Claims (4)

[Claims] 1. A cover body fixed to the outside of the door so as to surround a keyhole of the door; a lid member pivotally attached to the cover body so as to open or close an internal space of the cover body; A locking piece provided on the open end side of the inside; a closed position and an open position for restraining the lid member at the time of closing the lid member at a portion facing the open end side of the lid member inside the cover body or releasing the restraint. It is provided so that it can slide between and
A latch body that selectively engages with the locking piece when the lid member is locked; a return spring that is provided in the cover body and biases the latch body toward the closed position; and an arbitrary number provided in the cover body. Magnetic card lock having a moving member that is selectively restrained by the magnetic pin of the cover body or released from the restraint; a magnetic pin when the moving member is restrained by inserting the cover body into the card insertion passage After adjusting to the shear line by the magnetic force of the magnetizing part,
A protective cover device for a keyhole, comprising a combination card for displacing a latch body from a closed position to an open position via a moving member. 2. The protective cover device for a keyhole according to claim 1, wherein the tip of the combined card inserted into the card insertion passage of the cover body is brought into contact with the moving member prior to the contact thereof, so that the return spring is more than the return spring. A push spring with large elasticity is provided so as to face the tip of the insertion card with respect to the moving member in the cover body, and when a different card or a strong thin plate is inserted into the card insertion path, The front end of the stop piece, which is slidably guided along the sliding direction of the moving member, is brought into contact with a part of the cover body to limit the pushing depth of the stop piece by a different card or a tough thin plate. Keyhole protective cover device. 3. The protective cover device for a keyhole according to claim 1, wherein an opening spring for urging the lid member in the opening direction is attached to a pivotally connecting portion of the cover body and the lid member. 4. The protective cover for a keyhole according to claim 2, wherein the stop piece has a vertical cross-section formed in a U-shape, and a push spring having a coil shape is attached to an internal space of the stop piece. apparatus.