Door knob security equipment

Abstract

To provide a doorknob crime prevention device which is inexpensive, has a simple structure, is highly safe, and is also highly convenient. [Solution] A doorknob security device 10 is located on the indoor side and includes a knob, a neck portion N2 extending from the knob to the door, and a knob lock, with an indoor operation portion provided on the knob lock. The doorknob security device includes a cover 12 formed of a flexible sheet and substantially covering the entire doorknob N, and a security device body 20 formed of a rigid material, fixed inside the cover and having a circular top plate portion 22 and a cylindrical portion 24 extending a predetermined length from the top plate portion, the cover being configured to be longer than the length of the doorknob, and a tightening cord 16 for closing the mouth portion provided on the mouth portion 12, and the security device body covers at least a portion of the knob including the indoor operation portion, and has a length that allows the top plate portion to be separated a predetermined length from the indoor operation portion when attached to the doorknob.

Description

[Technical field]

[0001] The present invention relates to a doorknob security device, and more specifically, to a doorknob security device that covers a doorknob on the indoor side and is equipped with a knob, a neck extending from the knob to the door, and a knob lock, the knob lock having an indoor operating part for the purpose of security. [Background technology]

[0002] A known method of burglary is to break a part of a door of a house to open the ball lock. To prevent this, for example, the following lock protector is proposed in Japanese Patent No. 3072276.

[0003] The lock protector according to Patent No. 3072276 is characterized by comprising a cover body that covers the indoor operating portion of the lock and restricts the unlocking operation, a locking portion that irremovably locks the cover body to the indoor operating portion, and a padlock that detachably joins the cover body and the locking portion to keep the cover body covering the indoor operating portion. The indoor operating section consists of a doorknob with a locking button for a knob lock, the cover body consists of a cylindrical body with an open end, the locking section consists of a clamping plate with a pair of flexible leg pieces that clamp the neck of the doorknob, the other end face of the cylindrical body prevents the locking button from protruding, and one end of the peripheral wall of the cylindrical body has a pair of opposing slits formed therein through which the tip of the flexible leg piece at one end of the clamping plate and the other end of the clamping plate are respectively inserted, a fin extends along one of the slits through which the tip of the flexible leg piece is inserted, and fixing holes are drilled into the fin and the tip of the flexible leg piece for inserting the legs of a padlock. Alternatively, the indoor side operating section comprises a doorknob with a thumb turn for a knob lock, the cover body comprises a cylinder with an open end, the locking section comprises a clamping plate having a pair of flexible legs that clamp the neck of the doorknob, an auxiliary plate is fixed to the base of the doorknob, and an anti-rotation protrusion is formed on the surface of the auxiliary plate, a groove is formed on the inner surface of the other end of the cylinder that engages with the thumb turn to regulate its rotation, a notch is formed in one end of the peripheral wall of the cylinder for engaging with the anti-rotation protrusion of the auxiliary plate, and a pair of opposing slits are formed through which the tip of the flexible leg at one end of the clamping plate and the other end of the clamping plate are inserted, a fin protrudes along one of the slits through which the tip of the flexible leg is inserted, and fixing holes are drilled in the fin and the tip of the flexible leg for inserting the legs of a padlock.

[0004] The lock protector proposed in this patent makes it impossible to remove the cylinder and expose the doorknob unless the padlock is opened, so even if an intruder breaks the glass and reaches his hand in, he will not be able to operate the lock button or thumb turn to unlock the knob lock, providing a high level of security.

[0005] However, the above proposed lock protection devices have complex structures such as padlocks, making them expensive, and they require a separate key or the need to remember a PIN number to open them properly.

[0006] Therefore, the applicant of the present application proposed the following doorknob security device in a previous utility model registration application (Utility Model Application No. 2024-003679). The doorknob security device of this application is a doorknob security device that covers a doorknob on the indoor side for security purposes, and includes a knob, a neck extending from the knob to the door, and a knob lock, and the knob lock has an indoor operating part. This doorknob security device is as follows: A cover formed of a flexible sheet and substantially entirely covering the doorknob; and a crime prevention device body that is fixed to the inside of the cover, has a circular top plate portion and a cylindrical portion extending a predetermined length from the top plate, and is made of a rigid material; The cover is configured to be considerably longer than the length of the doorknob, and a tightening string is provided at the opening to close the opening, The security device body covers at least a portion of the knob including the indoor operation part, and has a length that allows the top plate to be separated from the indoor operation part by a predetermined length when the security device body is attached to a doorknob, The fastening cord can be attached to the doorknob by tying the fastening cord to the neck portion with a space at the tip and covering the entire doorknob.

[0007] This doorknob security device has a simple structure consisting entirely of a cover and a cylindrical security device body fixed inside the cover, so that it is inexpensive. At the same time, even if someone manages to break the glass or the like and reach the doorknob on the inside side, the tightening cord of the cover is tied to the neck of the doorknob and cannot be easily removed, and it takes time, so that anyone attempting to break in illegally will have no choice but to give up, making it an effective security device. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 3072276 Summary of the Invention [Problem to be solved by the invention]

[0009] Therefore, the object of the present invention is to provide a doorknob security device that is inexpensive, has a simple structure, is highly safe, and is also highly convenient. [Means for solving the problem]

[0010] The above problems can be solved by the doorknob security device of the present invention having the following configurations (1) to (8). (1) A doorknob security device is provided for covering a doorknob on the indoor side, the doorknob being provided with a knob, a neck portion extending from the knob to a door, and a knob lock, the knob lock being provided with an indoor side operating portion, for security purposes. The doorknob security device is as follows: A cover formed of a flexible sheet and substantially entirely covering the doorknob; and a crime prevention device body that is fixed to the inside of the cover, has a circular top plate portion and a cylindrical portion extending a predetermined length from the top plate, and is made of a rigid material; The cover is configured to be considerably longer than the length of the doorknob, and a tightening string is provided at the opening to close the opening, The security device body covers at least a portion of the knob including the indoor operation part, and has a length that allows the top plate to be separated from the indoor operation part by a predetermined length when the security device body is attached to a doorknob, A doorknob security device that is attached to a doorknob by tying the tightening cord to the neck portion with a space at the tip and covering the entire doorknob, The doorknob security device is formed such that at least a part of the cover body and the security device main body are made of a transparent body so that it is possible to confirm whether the indoor operating part of the knob arranged inside the doorknob security device is in the locked or unlocked state when the doorknob security device is attached to the doorknob. (2) The doorknob security device according to (1) above, wherein the covering body is formed from any one of leather, cloth, knitted material, and plastic sheeting, or a combination thereof, with at least the transparent body portion being formed from a transparent plastic sheeting. (3) A doorknob security device is provided for covering a doorknob on the indoor side, the doorknob being provided with a knob, a neck portion extending from the knob to a door, and a knob lock, the knob lock being provided with an indoor side operating portion, for security purposes. The doorknob security device is as follows: A crime prevention device body having a circular top plate portion and a cylindrical portion extending a predetermined length from the top plate and formed of a rigid material; A cover is fixed to the outside of the crime prevention device body, is made of a flexible sheet, and has an opening so that it can cover the periphery of the crime prevention device body except for at least a part of the periphery. Equipped with The cover has a length that extends to the neck of the doorknob when the doorknob security device is attached to the doorknob, and a tightening string is provided at the opening at the end of the cover to close the opening, The security device body covers at least a portion of the knob including the indoor operation part, and has a length that allows the top plate to be separated from the indoor operation part by a predetermined length when the security device body is attached to a doorknob, A doorknob security device that is attached to a doorknob by tying the tightening cord to the neck portion with a space at the tip and covering the entire doorknob, This doorknob security device has at least a portion of the security device body that corresponds to the opening of the cover body formed of a transparent material so that it is possible to check whether the indoor operating portion of the knob located inside the doorknob security device is in the locked or unlocked state when the doorknob security device is attached to the doorknob. (4) The doorknob security device according to (1) or (3), wherein the cover is made of a material that is resistant to breakage and flame-resistant. (5) The above-mentioned (1) or (3) is a doorknob security device of 3, in which a bell or a bell is attached to the fastening cord, so that a sound is emitted when the fastening cord is untied. (6) The doorknob security device according to (1) or (3), wherein the security device body is entirely made of a transparent plastic plate, or at least a portion of the transparent body is made of transparent plastic. (7) The doorknob security device according to (1) or (3), wherein the transparent body portion is the top plate. (8) A doorknob security device as described in (1) or (3) above, in which the tightening cord is fitted with a connector to which at least one accessory such as a bell or a click can be attached. Effect of the Invention

[0011] The doorknob security device of the present invention has a simple structure consisting only of a cover and a cylindrical security device body fixed inside the cover, so it is inexpensive. At the same time, even if someone manages to break the glass or the like and reach the doorknob on the indoor side, the tightening cord of the cover is tied to the neck of the doorknob and cannot be easily removed, and it takes time, so that anyone attempting to break in illegally will have to give up, thereby providing good security. In addition, at least a portion of the cover and the security device body are made transparent, so it is easy to check whether the indoor operating part inside is locked, making it very convenient. In other words, the doorknob security device of the present invention is inexpensive, has high security, and is highly convenient. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing the external shape of an example of a doorknob on the inside of a house in which the doorknob security device of the present invention is installed. [Diagram 2]FIG. 2 is a perspective view showing the doorknob security device according to the embodiment of the present invention attached to the doorknob of FIG. [Diagram 3] FIG. 3 is a vertical sectional view of the doorknob security device in the state shown in FIG. 2 (the exterior of the doorknob is shown in solid lines). [Figure 4] FIG. 4 is a perspective view showing the doorknob security device shown in FIGS. 1 and 2 in a state (inoperative state) hung on the neck portion of a doorknob. [Diagram 5] FIG. 5 is a vertical sectional view of the doorknob security device in the state shown in FIG. 4 (the exterior of the doorknob is shown in solid lines). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, a doorknob security device according to an embodiment of the present invention will be described with reference to the attached drawings. In this specification, the outdoor side of the doorknob security device may be referred to as the "rear end" and the indoor side as the "front end". First, with reference to FIG. 1, an example of a doorknob to which a doorknob security device according to an embodiment of the present invention is attached will be described.

[0014] The doorknob N to which the doorknob security device 10 according to the embodiment of the present invention is attached comprises a knob N1, a neck N2 extending from the knob to the door (shown by the symbol D in FIG. 3 etc.), a knob lock (not shown) provided inside the doorknob N, and a lock operation member N3 for locking and unlocking the knob lock from inside the room. Note that, although a thumb turn type is shown as the example of the lock operation member N3 in the drawings, a push button type may also be used.

[0015] The doorknob security device 10 according to an embodiment of the present invention, which is attached to the doorknob N described above, comprises a cover 12 formed from a flexible sheet that covers substantially the entire doorknob, and a security device main body 20 that essentially functions as a security cup and is firmly fixed to the inside tip side of the cover 12 by sewing, adhesive, etc., with a portion exposed, as shown in Figure 2 onwards.

[0016] The crime prevention device body 20 is formed entirely from a rigid material, and as shown in FIG. 3, has a circular top plate portion 22 and a cylindrical portion 24 that is molded integrally with the top plate and extends a predetermined length from the top plate. At least the top panel portion 22 is preferably made of a transparent body, particularly a transparent plastic plate. It is preferable that a metal plate or a plastic plate is used for the cylindrical portion 24. The metal plate is preferably made of stainless steel, copper, aluminum, or other alloys. The entire crime prevention device body 20 may be transparent, and if the inside can be seen, a transparent part may be provided on the cylindrical portion 24.

[0017] It is particularly preferred that the plastic plate has a predetermined rigidity, break resistance, and flame resistance. Such a plastic plate is preferably made of fiber-reinforced plastic. In this case, it is particularly preferred that the fiber-reinforced plastic has a predetermined rigidity, break resistance, and flame resistance, and that the reinforcing fiber also has break resistance and flame resistance.

[0018] The security device body preferably covers at least a part of the knob including the indoor operation part, and has a length that allows the top plate to be separated from the indoor operation part by a predetermined length when attached to the doorknob (see FIG. 2, etc.). This is to prevent the top plate 22 from being pressed against the lock operation member N3 (thumb turn) from the outside of the cover body 12 to operate it.

[0019] The cover 12 is made of a material having break resistance and flame resistance, and for example, as shown in FIG. 2, it has a cylindrical shape (skirt shape) and is fixed so as to cover the circumference of the cylindrical portion 24. The cover 12 is configured to extend beyond the end of the cylindrical portion 24 by a predetermined length, and the mouth portion 14 at the end is provided with a tightening string 16 for closing the mouth portion. In other words, it can be said that the cover 12 has a shape with openings at both ends. As a material having break resistance and flame resistance for forming the cover, it is preferable to use any one of leather, cloth, knitted fabric, and plastic sheet, or a combination thereof, which are given break resistance and flame resistance. Preferable plastics include PEEK, PPS, PTFE, PVDF, PEI, PPSU, PI, etc. In addition, as a commercially available product, a thick so-called cutting board sheet made of polypropylene is preferably used because it is break resistance and flame resistance.

[0020] In the above example, the cover 12 is described as having an opening formed at a position that matches the transparent portion (top plate 22) of the crime prevention device body, but the opening may be replaced by a transparent body, or the entire cover may be transparent. In other words, any structure is acceptable as long as it allows the state of the internal lock to be confirmed.

[0021] The doorknob security device 10 according to the embodiment of the present invention is attached to the doorknob by leaving a gap at the tip side (between the top plate 22 and the tip of the doorknob N) as shown in Figure 2 onwards, covering the entire doorknob, and wrapping the tightening string around the neck part two to three times and tying it (tying it). The reason why the top plate 22 and the tip of the doorknob N are attached with a gap between them is to prevent, for example, the rotation of the cylindrical portion 24 being transmitted to the thumb turn by friction when the top plate is pressed against the thumb turn, causing the thumb turn to rotate and unlock. Therefore, it is desirable to set the length of the cylindrical portion 24 to a length that does not allow the top plate to come into contact with the thumb turn even when pressed against the door. When not in use, the doorknob security device 10 can be hung on the doorknob N (neck) with the tightening cord 16 as shown in Fig. 5, and kept waiting for use. This prevents the doorknob security device from being forgotten to be put away or lost.

[0022] The tightening cord 16 is preferably provided with a connector 40 having a bell 30 or the like attached to its tip. The connector 40 is preferably a multiple ring type connector or a connector such as that used in key chains (hook-shaped, ring-shaped, screw-type connector, etc.). By attaching one or more bells 30 to the connector 40, when the doorknob security device 10 is attached to the doorknob N, if someone tries to untie the tightening cord 16 from the outside by breaking a part of the door or tearing the cover, a sound is emitted so that people inside the house notice the abnormality and can call 110 or shout loudly from the inside with the door in between them, preventing the crime from happening without putting people inside the house in danger. [Explanation of symbols]

[0023] D Door N Door knob N1 Grip ball N2 Neck N3 Lock operation parts 10 Doorknob Security Devices 12 Covering Body 14 Mouth 16 Tightening cord 20. Security equipment body 22 Tabletop 24 Cylindrical section 30 Bell 40 Connector

Claims

1. A doorknob security device is provided for covering a doorknob on the indoor side, the doorknob being provided with a knob, a neck portion extending from the knob to a door, and a knob lock, the knob lock being provided with an indoor side operating portion, for security purposes. The doorknob security device is as follows: A cover formed of a flexible sheet and substantially entirely covering the doorknob; and a crime prevention device body that is fixed to the inside of the cover, has a circular top plate portion and a cylindrical portion extending a predetermined length from the top plate, and is made of a rigid material; The cover is configured to be considerably longer than the length of the doorknob, and a tightening string is provided at the opening to close the opening, The security device body covers at least a portion of the knob including the indoor operation part, and has a length that allows the top plate to be separated from the indoor operation part by a predetermined length when the security device body is attached to a doorknob, A doorknob security device that is attached to a doorknob by tying the tightening cord to the neck portion with a space at the tip and covering the entire doorknob, The doorknob security device is formed such that at least a part of the cover body and the security device main body are made of a transparent body so that it is possible to confirm whether the indoor operating part of the knob arranged inside the doorknob security device is in the locked or unlocked state when the doorknob security device is attached to the doorknob.

2. 2. The doorknob anti-theft device according to claim 1, wherein said covering body is made of any one of leather, cloth, knitted material and plastic sheet, or a combination thereof, with at least said transparent body portion being made of a transparent plastic sheet.

3. A doorknob security device is provided for covering a doorknob on the indoor side, the doorknob being provided with a knob, a neck portion extending from the knob to a door, and a knob lock, the knob lock being provided with an indoor side operating portion, for security purposes. The doorknob security device is as follows: A crime prevention device body having a circular top plate portion and a cylindrical portion extending a predetermined length from the top plate and formed of a rigid material; A cover is fixed to the outside of the crime prevention device body, is made of a flexible sheet, and has an opening so that it can cover the periphery of the crime prevention device body except for at least a part of the periphery. Equipped with The cover has a length that extends to the neck of the doorknob when the doorknob security device is attached to the doorknob, and a tightening string is provided at the opening at the end of the cover to close the opening, The security device body covers at least a portion of the knob including the indoor operation part, and has a length that allows the top plate to be separated from the indoor operation part by a predetermined length when the security device body is attached to a doorknob, A doorknob security device that is attached to a doorknob by tying the tightening cord to the neck portion with a space at the tip and covering the entire doorknob, In this doorknob security device, at least the part of the security device main body that corresponds to the opening of the cover body is made of a transparent material so that it is possible to check whether the indoor operating part of the knob located inside the doorknob security device is in the locked or unlocked state when the doorknob security device is attached to the doorknob.

4. 4. The doorknob security device according to claim 1, wherein the cover is made of a material having resistance to breakage and flame resistance.

5. 4. The doorknob security device according to claim 1 or 3, wherein the fastening cord has a bell attached thereto so as to emit a sound when the fastening cord is untied.

6. 4. The doorknob security device according to claim 1 or 3, wherein the security device body is entirely made of a transparent plastic plate, or at least a portion of the transparent body is made of transparent plastic.

7. 4. The doorknob security device according to claim 1, wherein the transparent body is the top plate.

8. 4. A doorknob security device according to claim 1 or 3, wherein said tightening cord is provided with a connector to which at least one accessory such as a bell can be attached.

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