JP3093603U - Security Door Viewer - Google Patents

Abstract

(57) [Summary] (Modified) [Problem] To provide a security door viewer that is extremely effective in terms of security measures, is economically inexpensive to install, and is compatible with already installed door viewers. . SOLUTION: An inner lens barrel 6 having a flange portion locked on the indoor side surface of the door and a cylindrical portion having a screw portion formed on an inner or outer peripheral surface, and an inner barrel 6 locked on the outdoor side surface of the door. An outer barrel 2 having a flange portion and a cylindrical portion formed on an outer peripheral surface or an inner peripheral surface with a screw portion to be screwed with the screw portion of the inner barrel, and a cylindrical portion of the outer barrel or the inner barrel. An objective lens 3 and an eyepiece 5 supported inside the camera;
A viewer plate having a flange portion locked to the indoor side surface of the door and a centrally located observation opening for supporting the inner lens barrel from the indoor side surface side of the door;

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is intended for crime prevention where effective security measures are taken against unauthorized bypass unlocking. It's about the Door Viewer.

[0002]

[Prior art]

  There are frequent fraudulent acts to unlock the door due to so-called bypass actions, which is a security measure. It is an urgent task to take effective crime prevention measures against unauthorized bypass activities. It Bypass unlocking is done by removing the viewer barrel on the door, Inserting a bypass tool through the door viewer opening and rotating the thumb turn Is done by. Therefore, in order to prevent the bypass unlocking, It is important to have a structure that makes the unit difficult to remove and break.

[0003]   The conventional door viewer has an opening on the door plate and locks it on the surface of the door plate inside the room. A lens barrel with an internal flange is attached to the opening, and the objective lens is placed inside the lens barrel. A structure in which an outer lens barrel holding the lens and the eyepiece is screwed is adopted. That In the inner and outer lens barrels, the flange of the inner lens barrel is locked to the indoor surface of the door plate, Thread or screw in so that the flange of the outer lens barrel engages with the outer surface of the door plate. It is fixed to the door. However, this conventional door viewer structure In the manufacturing process, when the outer lens barrel is removed from the outdoor side, the inner lens barrel will remove the tool from the outdoor side. There is a problem that it can be easily removed from the door plate by pushing it out. It was

[0004]   As a method of solving the above-mentioned problems with the door viewer, a moon-shaped A notched engaged hole is formed, and a moon-shaped protrusion is formed on the flange of the outer lens barrel. However, a lunar-shaped projection is fitted into the lunar-shaped hole to form a detent (for example, (See Reference 1). With this known method, the outer lens barrel can be rotated from the outdoor side. This is an effective measure for crime prevention because it cannot be done.

[0005]

[Patent Document 1]   JP 2000-297583A

[0006]

[Problems to be solved by the device]

  The door viewer with the above-mentioned known anti-rotation measures has some security measures. The effect of is achieved. However, when implemented, the shape of the holes formed in the inner door plate Shape and the shape of the hole formed in the outer door plate are different, so two molds are used to manufacture the door plate. However, the manufacturing cost is high. In addition, already in houses and apartments When carrying out on installed doors, it is necessary to change the door plate as well, resulting in high cost. There was a difficulty in economics.

[0007]   Therefore, the object of the present invention is extremely effective from the viewpoint of crime prevention measures, and It is to provide a crime prevention door viewer that can be installed economically and inexpensively.   Furthermore, another object of the present invention, along with crime prevention measures, is to install doors already installed in the door. You can use the viewer or door finder as it is, and use it with the existing door viewer. The purpose of the present invention is to provide a door viewer for crime prevention that is compatible with.

[0008]

[Means for Solving the Problems]

  The security door viewer according to the present invention is provided with a flange that is locked on the inner surface of the door. Inner lens barrel having a cylindrical portion with a threaded portion formed on the inner peripheral surface or the outer peripheral surface When,   The flange part that is locked to the outdoor surface of the door, and the inner surface on the outer peripheral surface or the inner peripheral surface An outer lens barrel having a cylindrical portion formed with a screw portion that is screwed into the screw portion of the lens barrel;   The objective lens and the contact lens supported inside the cylindrical portion of the outer lens barrel or the inner lens barrel. An eye lens,   A flange that is locked to the interior surface of the door, and an observation opening in the center And a viewer plate for supporting the inner lens barrel from the indoor side of the door. e,   Both the inner lens barrel and the outer lens barrel are fixed to the door plate by screwing them together. In addition, the viewer plate is fixed to the indoor surface of the door with screw members. It is characterized by

[0009]   In the present invention, the inner lens barrel located inside the door is configured by the viewer plate. The flange is supported from the room side so that it is pressed against the surface of the door plate. The outer lens barrel was removed, and the inner lens barrel was pushed out from the outdoor side with a tool. However, it is impossible to remove the inner lens barrel due to the presence of the viewer plate. . As a result, it becomes difficult to insert the bypass tool from the outdoor side to the indoor side, Effective security measures can be achieved against unauthorized bypass unlocking.

[0010]   The preferred embodiment of the crime prevention door viewer according to the present invention is the opening of the viewer plate. Make the diameter of the mouth smaller than the diameter of the eyepiece supported by the inner lens barrel. It is characterized by that. Since the viewer plate has an opening for observation, A bypass tool may be inserted through the opening. But for observation By making the diameter of the opening of the eyepiece smaller than the diameter of the eyepiece, the bypass tool It becomes difficult to insert and the operability of the bypass tool deteriorates. As a result, whether it is outdoors It becomes difficult to rotate the thumb turn and the security can be further enhanced. By the way, -Even if the diameter of the observation opening of the arm plate is smaller than the lens diameter of the eyepiece It has been confirmed that there is no problem in practical use because the field of view is only slightly narrowed. .

[0011]

[Embodiment of device]

  1 and 2 show the construction of an example of a security door viewer according to the present invention. FIG. 1 is an exploded perspective view, and FIG. 2 is a cross-sectional view showing the structure when it is mounted on a door. In this example, an example of attaching a door viewer to a two-door will be described. Door 1 Has an indoor side door plate 1a and an outdoor side door plate 1b, and the outer lens barrel 2 is attached to the outdoor side door plate 1 Fit into the hole formed in b. The outer lens barrel 2 is attached to the outdoor surface of the outdoor door plate 1b. It has a flange 2a to be stopped and a cylindrical portion 2b, and the outer peripheral surface of the cylindrical portion 2b forms a male screw. To do. The lens frame 4 holding the objective lens 3 is fitted and attached to the outer lens barrel 2, The eyepiece 5 is fitted into the other end of the. An inner mirror is provided in the hole formed in the interior door plate 1a. Insert the tube 6. The inner lens barrel 6 is locked on the indoor surface of the indoor door plate 1a. It has a flange 6a and a cylindrical portion 6b, and a female screw is formed on the inner peripheral surface of the cylindrical portion. Servant Then, by rotating the inner lens barrel 6, the outer lens barrel 2 and the outer lens barrel 6 are moved to each other. The two lens barrels 2 and 6 are fixed to the door 1 by screwing.

[0012]   In the present invention, the viewer plate 7 is arranged on the inner lens barrel 6, and the screws 8a and 8 The interior door plate 1a is screwed by b. The viewer plate 7 is in the center There is an opening 8a for the viewfinder, and the inhabitants of the room can view the outdoor scene through the opening 8a. And visitors can be observed. The diameter of this aperture is the lens of the eyepiece lens 5. It is preferably smaller than the diameter. Thus, smaller than the diameter of the eyepiece Prevents the bypass tool from being inserted into the room from the outside. be able to.

[0013]   In the state described above, an unauthorized person who tries to enter the room uses a tool to When the barrel 2 is forcibly rotated and removed, the inner lens barrel 6 is further moved to the indoor side by using a tool. The inner lens barrel 6 is supported from the inside by the viewer plate 7 Therefore, it is impossible to remove the inner lens barrel 6. As a result, It becomes difficult to insert the tool for indoor use inside the room, which is extremely effective for crime prevention. on the other hand Insert the bypass tool into the room through the opening 7a of the viewer plate 7. Even if you try, insert the bypass tool because the opening 7a of the viewer plate is small. It is difficult to insert, and there is not enough operability to rotate the thumb turn. It has been confirmed. Therefore, a security door that is extremely effective against unauthorized bypass unlocking Viewer can be realized.

[0014]   The present invention is not limited to the above-described embodiments, and various modifications and changes can be made. An example For example, in the above-described embodiment, the outer lens barrel is configured to be screwed into the inner lens barrel. However, it is also possible to screw the inner lens barrel into the inner side of the outer lens barrel.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of an example of a door viewer according to the present invention.

FIG. 2 is a sectional view showing a door viewer according to the present invention mounted on a door.

[Explanation of symbols]

1a, 1b door plate 2 outer lens barrel 3 Objective lens 4 lens frame 5 eyepiece 6 Inner lens barrel 7 viewer plate

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[Procedure amendment]

[Submission date] December 4, 2002 (2002.12.
4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

Claims (2)

[Scope of utility model registration request] 1. An inner lens barrel having a flange portion that is locked to the indoor surface of the door, and a cylindrical portion that has a threaded portion formed on the inner peripheral surface or the outer peripheral surface, and is locked to the outdoor surface of the door. An outer lens barrel having a flange portion and a cylindrical portion having an outer peripheral surface or an inner peripheral surface on which a screw portion to be screwed with the screw portion of the inner lens barrel is formed; and a cylinder of the outer lens barrel or the inner lens barrel. The inner lens barrel has an objective lens and an eyepiece lens supported inside the chamber, a flange that is locked to the indoor surface of the door, and an observation opening located in the center. A viewer plate supported from the inner surface side, the inner lens barrel and the outer lens barrel are fixed to the door plate by screwing the inner lens barrel and the outer lens barrel, and the viewer plate is fixed to the indoor surface of the door by a screw member. For crime prevention characterized by A viewer. 2. A crime prevention door viewer, wherein a diameter of an opening portion of the viewer plate is smaller than a diameter of the eyepiece lens.