JPH0791117A - Knob cover for crime prevention of door - Google Patents

Abstract

PURPOSE:To promote crime prevention, by fitting the nearby position of the opening of knob cover body to the small diameter part in the depth of the grasping part of knob in the state that the door knob is attached, so as to cover the door knob at least in the using state. CONSTITUTION:A door 1 is closed and a cylinder lock is locked. A lock pin 6A of a locking device 6 is pushed down to fit to the small diameter part 2B positioned in the depth of the grasping part 2A, in the state that the nearby position of the opening 5 of a knob cover body 4 made of a hollow cylinder 3 with the bottom is fitted to the knob 2 of door 1. Next, the cover body 4 is locked double so that the cover is inseparable from the knob 2 and the key hole of the cylinder lock of the knob 1 is invisible. Next, the cover body 4 is rotated 180 degrees and the locking device 6 is positioned at the lower part of knob 2 so as to be invisible from the outside. In this way, the cylinder lock can not be manipulated as long as the cover body is not removed. And hence, the crime prevention can be promoted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crime prevention knob cover attached to a knob for opening a door of a house or the like, and a cylinder lock of the knob unless the knob cover is locked by covering the knob cover. It is an object of the present invention to provide a crime prevention knob cover for a door, which can be made to be in a double-locked state so as to have a higher crime prevention property by making the keyhole of the door invisible.

[0002]

2. Description of the Related Art Conventionally, it has been said that one-door two-lock locking is good for security reasons, and it has become very popular in doors in recent years. There was nothing that could be removed. Further, there is no locking means that can be added to the one-lock type knob that has been used conventionally without any work.

[0003]

Therefore, when the one-lock type knob has been used in the past, or when it is desired to use the two-lock type, it is necessary to replace the entire cylinder lock having the knob by carrying out the work one by one. It must be done in a hurry, it is too expensive and cumbersome, and even with a two-lock type knob, for example, if you lost your key and someone else may have picked it up from the inside at night, etc. I was very confused when I could not immediately replace the cylinder lock when I was anxious just by locking.

Therefore, it is a convenient locking means for quickly disabling the keyhole of the knob if necessary, and can be easily mounted and locked by a separate part detachable from the knob or appropriate means. There is a strong demand for the appearance of an inexpensive and reliable locking means that can be easily unlocked.

Therefore, as a result of repeating day and night thought and error, the inventor of the present invention has come up with the invention of a unique locking device that has never been seen, based on the idea of locking the door knob with the cover. .

[0006]

In order to achieve the above object, the present invention provides an opening of a knob cover main body formed of a hollow bottomed cylindrical body so as to cover a door knob at least in a use state. For the crime prevention of doors having a structure in which the knob cover is attached to the door knob in the vicinity of the portion and engages with a small-diameter portion located on the back side of the grip portion of the door knob so that the knob cover cannot be removed from the knob. It is a knob cover.

[0007]

Therefore, after the door is closed and the cylinder lock is locked, the knob cover of the present invention is attached and locked so as to cover the knob, unless the knob cover (knob cover body) is removed. The lock cannot be operated, and the double lock state preferable for crime prevention can be achieved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of an external appearance of a first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the first embodiment of the present invention. A small diameter portion 2B located on the inner side of the grip portion 2A of the knob 2 of the door 1 attached to the knob 2 of the door 1 in the vicinity of the opening 5 of the knob cover body 4 made of a cylindrical body 3. A knob cover for door security having a structure in which a locking device 6 having a lock pin 6 is provided in the vicinity 5A of the opening 5 of the knob cover body 4 in order to make the knob cover body 4 incapable of being detached from the knob 2 by engaging with. It is what you have done.

Therefore, after the door 1 is closed and the cylinder is locked, the knob cover body 4 of the present invention is covered as shown in FIG. 2, and the lock pin 6A is pushed down to engage the small diameter portion 2B of the knob and the knob cover. The main body 4 cannot be detached from the knob 2 so that a double lock state can be achieved. Since the locking device 6 may have a conventionally known structure, the description of the internal structure will be omitted.

Further, in this state, the knob cover body 4 is
If it is rotated by 80 degrees, the locking device 6 will be located below the knob 2, which makes it difficult to visually check the appearance, which is more preferable for crime prevention.

Further, the locking device 6 may be of various other structures known in the prior art, and the small diameter portion of the knob may be clamped not only from one place but from both sides so as not to be separated from the knob. It is also possible.

The inner surface of the knob cover body 4 may be flocked to prevent rattling of noise and vibration of the knob cover and damage to the knob, which can be appropriately implemented by the designer.

Next, another embodiment will be described. As shown in FIGS. 3 and 4, the metal knob cover main body 14A,
14B is divided into two parts, and is pivotally supported by a hinge part 17 provided at a proper position on the outer peripheral part so as to be openable and closable, and engages the opening part 15 side so as to cover the small diameter part 2B of the knob 2. , A pair of holes 18 that abut and face each other in the closed state
Engagement annular portions 18E and 18F having tongue pieces 18C and 18D with A and 18B are provided. After closing the door 1 and locking the cylinder as shown in FIG. 4, the invention product shown in this embodiment is put on. If a padlock 19 is locked in the holes 18A, 18B of the pair of tongue pieces 18C, 18D which are closed and abutted, the knob cover is useful for crime prevention with the same operation and effect as in the above embodiment.

Next, a further embodiment will be described.
As shown in FIG. 5, it is integrally molded from polypropylene resin, for example, and the self-hinge 2 is formed in the thin portion.
0, and thus can be used as in the previous example,
It can be mass-produced at a lower cost, and can be stacked and carried in an open state by appropriately providing a draft at the time of molding, so that the cost in the transportation process can be reduced and the cost can be provided at a lower cost. Further, as shown in the drawing, if the portion facing the key hole located in the center of the knob is made to project, the key cannot be inserted into the key hole even if it is slightly pryed, and further certainty can be obtained. .

Next, another embodiment will be described with reference to FIGS. 6 to 8. In the locked state, when the knob cover bodies 14A and 14B are disengaged from the door knob 2, an appropriate alarm is issued. Since the locking device has the same structure as that of the above-described embodiment, the description thereof is omitted and only different parts will be described.

The microswitch 21 that stops at a position where it is pushed into one of the engaging annular portions 18E and 18F and the microswitch 2 that returns except for normal pressing force.
2 is mounted, and the protrusions 2 for pressing the microswitches 21 and 22 to the other engaging annular portions facing each other.
3, a button battery 26 and a piezoelectric buzzer 40 are provided as shown in FIG.
Micro switch 2 via 0 (not required when using a piezoelectric buzzer itself with a built-in sounding circuit)
1, 22 and a key switch 30 for turning on the switch by turning the key, that is, locking, is connected in series, and when the engaging annular portions 18E, 18F are opened (this state is normal). ) (State of FIG. 7) When the micro switch 21 set to the normally closed state closes the engaging annular portions 18E and 18F, the long protrusion 23 operates a little faster to make it open, and then set to the normally open state. The micro switch 22 is operated to open and the circuit to the piezoelectric buzzer 40 is turned off to complete the locking and use, and the knob cover is opened in a state where the key switch is not turned off due to breakage or the like. If the micro switch 22 is turned on, the micro switch 22 keeps the ON state even if it is opened. The circuit connected to the series is closed by the switch 21 and the piezoelectric buzzer 40 is operated to issue an alarm. In this case, it goes without saying that the components forming the circuit are concentrated in one of the engaging annular portions to make it difficult for the circuit to be cut.

Further, in this case, the effect of crime prevention is great only by displaying on the surface of the knob cover that an alarm is issued.

Needless to say, the present invention is not limited to the above-mentioned construction. For example, the knob cover may be a two-piece component that is appropriately fitted and used, or the locking device may be a dial lock. For example, the present invention can be modified and implemented without departing from the gist of the invention.

[0020]

Since the present invention has the configuration described above,
It is possible to provide a door crime prevention knob cover as a very useful locking device that can be used easily and quickly, and can reliably lock the locking device provided on the door knob so as not to be visible.

[0021]

[Brief description of drawings]

FIG. 1 is an external exploded perspective view of the present invention.

FIG. 2 is a vertical sectional view of the present invention.

FIG. 3 is a structural perspective view of another embodiment of the present invention.

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is a structural perspective view of still another embodiment of the present invention.

FIG. 6 is a vertical sectional view of still another embodiment of the present invention.

FIG. 7 is a circuit diagram of the present invention.

FIG. 8 is a time chart diagram 7 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Knob 2A Grip 2B Small diameter part 3 Hollow bottomed cylinder 4 Knob cover body 5 Opening 6 Locking device 6A Lock pin 14A, 14B Knob cover body 17 Hinge 18A, 18B hole 18C, 18D Tongue piece 18E, 18F Engagement annular part 19 Padlock 21,22 Micro switch 23,24 Protrusion 26 Button battery 30 Key switch 40 Piezoelectric buzzer

Claims (3)

[Claims] 1. A knob cover main body comprising a hollow bottomed tubular body that covers a door knob at least in a state of use, and is attached to the door knob near the opening. A door crime prevention knob cover having a structure in which a knob cover body is configured to be detachable from a knob by engaging with a small-diameter portion located on the inner side of a grip portion of the knob. 2. The knob cover for crime prevention of a door according to claim 1, wherein the knob cover main body is divided into two parts, and is pivotally supported by a hinge portion provided at a proper position on the outer periphery so as to be openable and closable. . 3. The door security knob cover according to claim 1 or 2, wherein the knob cover main body has a structure for issuing an appropriate alarm when the knob cover main body is disengaged from the door knob in the locked state.