JP4908247B2 - Door intercom with camera for intercom equipment - Google Patents

Description

  The present invention relates to an entrance phone with a camera of an interphone device, and more particularly to an improvement for maintaining good imaging of a camera.

The intercom unit with a camera is designed to be able to change the imaging direction of the camera so that the visitor is in the center of the screen because the imaging range of the visitor to be imaged differs depending on the situation of the installed entrance. There is something. In such a conventional entrance slave unit with a camera, a camera window is provided in the entrance slave unit case, and a camera is installed inside the entrance slave unit case so that the angle of the camera can be changed. Was provided.
Thus, by providing a space around the camera and pivoting the camera in the case, the tilt (or pan) operation can be easily performed, and the camera can be fixed with the camera facing the most visible position. (For example, refer to Patent Document 1).
JP 2004-56526 A

However, in this way, the front door with the camera provided with a sufficient space around the camera lens in order to be able to change the imaging direction of the camera, the space in front of the camera is provided continuously with the other spaces in the case. For this reason, insects or the like that have entered from the hole in the speaker portion or the drain hole of the case may enter the front of the camera and stick to the front of the lens or the inside of the camera window. In this case, every time the camera performs an imaging operation, an insect or the like is imaged, and the shadow is projected on the monitor of the living room master unit, making it difficult to see the monitor screen.
In addition, it was necessary to take out the insects that entered, but it was not easy for ordinary users to open the entrance case and remove the insects. Furthermore, since the lens front space is continuous with the surrounding space in the case, when the outside air suddenly drops, condensation may occur on the lens and the camera window, making it difficult to see the captured image.

  Therefore, in view of such problems, the present invention does not allow insects entering from the speaker hole or drain hole to enter the front of the camera lens, and the entrance of the interphone device with a camera in which the lens and the camera window are difficult to condense. The purpose is to provide a handset.

In order to solve the above-described problems, the invention described in claim 1 is directed to an entrance device with a camera of an interphone device including a camera for imaging a visitor and a camera angle changing mechanism for changing the imaging direction of the camera. In order to isolate the space between the camera window and the camera provided in the entrance unit case from the surroundings, a box-like frame is attached around the camera lens and the block is in contact with or close to the frame. provided a frame camera window, the opposite surface of the frame body and a closed frame formed by providing the same curvature, the position of the center of curvature, Rutotomoni to match the rotation center of the camera angle changing mechanism, the rotation center It is arranged on the inner side of the case with respect to the frame body and the closed frame, and is provided with a curvature in the camera angle changing direction.
With this configuration, when the imaging angle of the camera is changed, the positional relationship between the frame provided around the lens and the closed frame provided on the camera window changes, but the center of curvature of the frame and closed frame and the center of rotation of the camera are different. Since they are the same, the frame moves so as to slide on the closing frame. Therefore, the facing relationship between the two does not change, the state where the lens front space is always isolated from the surrounding case internal space can be maintained regardless of the camera's imaging direction, and insects and the like can be prevented from entering the lens. Can do.
Further, by isolating the space between the lens and the camera window from the space inside the other case, it is difficult to move the air, and the lens and the lens window can be prevented from condensing.

According to a second aspect of the present invention, in the first aspect of the present invention, the frame body has an arcuate surface forming a part of a sphere.
With this configuration, it is possible to smoothly change the camera angle while maintaining a state in which the frame body and the closed frame are in close contact or close to each other in either pan or tilt directions.

According to the present invention, even if the imaging angle of the camera is changed, the frame body moves so as to slide on the closed frame, so that the opposing relationship between the frame body and the closed frame does not change. Therefore, the state where the lens front space is always isolated from the surrounding case space can be maintained regardless of the image capturing direction of the camera, and insects and the like can be prevented from entering the lens front.
In addition, by isolating the space between the lens and the camera window from the space inside the other case, the lens and the lens window can be made to have a structure that hardly condenses.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 shows an example of a camera-equipped entrance slave according to the present invention, in which (a) is a front view and (b) is an end view taken along line AA. In FIG. 1, 1 is a camera, 2 is a speaker hole with a speaker 3 inside, 4 is a microphone hole with a microphone (not shown) inside, 5 is a call button, 6 is for exposing the camera 1 A camera window provided in the case 7 and an illumination window 8 have a built-in illumination (not shown) for taking a camera image at night.
As shown in the cross-sectional view of FIG. 1B, the camera 1 includes a lens 10, an image sensor 11, an image pickup circuit unit 12, and the like. The camera unit 14 is configured integrally with the moving member.

  The case 7 is formed by a case upper 7a constituting the front surface and a case lower 7b constituting the rear surface, and the camera window 6 formed on the case upper 7a is closed by a transparent or translucent synthetic resin plate 13. Has been. Reference numeral 15 denotes a call circuit forming unit.

FIG. 2 shows an enlarged view of part B. In FIG. 2, reference numeral 18 denotes a lens hole for exposing the lens 10 of the camera 1, and reference numeral 19 denotes a frame attached to the camera 1 side so as to contact the lens hole 18. The lens hole 18 is formed inside the camera window 6, the inside of the camera window 6 around the lens hole 18 is a closed surface formed integrally with the case top 7 a, and only the lens hole 18 is opened in the camera window 6.
A frame body 19 is disposed so as to contact the lens hole 18. That is, the camera unit 14 is installed in the case 7 so that the frame body 19 comes into contact with the lens hole 18, and the space S between the camera window 6 and the camera 1 is isolated from other spaces in the case 7. It has become.
Reference numeral 20 denotes a screw for adjusting the focal point of the lens 10 and fixing the lens 10 to a cylindrical lens flange 21 that holds the lens 10, and the screw fixing portion is formed by cutting out a part of the frame body 19. .

3A and 3B are perspective views of the camera unit 14. FIG. 3A is a view in which the frame body 19 is attached, and FIG. 3B is a view in which the frame body 19 is separated. 3, 22 is pivot member for pivotally supported to the camera unit 14 in the case 7 by arranging the camera 1 to the central expansion width portion 23 is provided on the left and right ends of the extension of the shaft support member 22 A rotating shaft 24 is a printed circuit board that forms an essential part of the imaging circuit unit 12 by assembling an imaging circuit, and these are integrated by screwing or the like.

The frame body 19 is formed in a disc shape, has a round hole 19a that exposes the lens 10 at the center, and is formed by an arcuate curved surface that forms a part of a sphere. In addition, a pair of locking holes 19b for locking to the shaft support member 22 is formed in the back portion, and a pair of locking projections 25 are provided on the front surface of the corresponding shaft support member 22 with the lens 10 interposed therebetween. .
The frame body 19 is formed with a peripheral curved surface so that the center of curvature of the frame body 19 is disposed on the rotation shaft 23 of the camera unit 14 in a state of being attached to the shaft support member 22.

On the other hand, the lens hole 18 in contact with the frame body 19 is provided with a ring-shaped wall surface (blocking frame) 18a having a depth as shown in the rear perspective view of the case top 7a in FIG. 4, as shown in FIG. The inner surface is formed with a curvature, and this curvature is formed substantially the same as that of the frame body 19.
In FIG. 4, reference numerals 26a and 26b denote bearings that support the rotating shaft 23 and mount the camera unit 14, and 27 denotes a tilt knob 28 (shown in FIG. 5) provided at the end of the rotating shaft 23. The camera unit 14 is mounted so as to be rotatable (tilted) in the vertical direction.

  FIG. 5 shows a state where the shaft support member 22 and the tilt knob 28 which are a part of the camera unit 14 are attached to the upper case 7a. Actually, only the shaft support member 22 is not assembled to the case 7, and the camera unit 14 integrated with the printed circuit board 24 is assembled to the case 7. Further, the tilt knob 28 can be operated from the back of the case 7 by exposing the tip knob piece 28a from the lower case 7b.

As shown in FIG. 5, one of the rotation shafts 23 of the shaft support member 22 is inserted and supported by a bearing 26a on the right side of the case 7a, and the other side to which the tilt knob 28 of the rotation shaft 23 is assembled is the left side of the drawing. The bearing 26b is sandwiched and supported.
The rotating shaft 23, the bearings 26a and 26b, and the tilt knob 28 constitute a camera angle changing mechanism, and the tilt angle can be changed manually. Even if the tilt angle of the camera 1 is changed by operating the tilt knob 28, The angle of the camera 1 is changed while maintaining the state in which the frame body 19 is in contact with the lens hole 18.

As described above, when the imaging angle of the camera is changed, the positional relationship between the frame provided around the lens and the closed frame provided in the camera window changes, but the center of curvature of the frame and closed frame and the center of rotation of the camera are different. Since they are the same, the frame moves so as to slide on the closing frame. Therefore, the facing relationship between the two does not change, the state where the lens front space is always isolated from the surrounding case internal space can be maintained regardless of the camera's imaging direction, and insects and the like can be prevented from entering the lens. Can do.
Further, by isolating the space between the lens and the camera window from the space inside the other case, it is difficult to move the air, and the lens and the lens window can be prevented from condensing.
Further, since the frame body is formed in a spherical shape, the airtight state with the closed frame can be maintained even if the angle is changed in any of the pan and tilt directions, and the change operation can be performed smoothly.
In addition, by eliminating the gap between the lens unit and the camera window, the flanges required on the back of the camera window in order to prevent the substrate from being seen through the gap between the lens window and the camera are reduced. Therefore, the entire case can be reduced in size.

In the above embodiment, the frame body 19 is in contact with the wall surface 18a of the lens hole 18. However, the frame body 19 may be arranged with a small gap without being in contact therewith. For example, a clearance of about 0.2 mm may be provided, and insects or the like cannot enter if the clearance is about this level, and the clearance does not increase even if the camera angle is changed. Can prevent intrusion.
In addition, the frame body 19 is formed in a disc shape. However, in the case where only the tilting operation is possible as in the above embodiment, the frame body 19 may be formed in a bowl shape having a central axis in the lateral direction. . In this case, the shape of the wall surface 18a of the lens hole 18 may be formed by providing a bowl-shaped curved surface having the same shape.

1 shows an example of a camera-equipped entrance cordless handset according to the present invention, where (a) is a front view and (b) is an end view taken along line AA. It is the B section enlarged view of FIG. The perspective view of a camera unit is shown, (a) is the figure which assembled | attached the frame, (b) is the figure which isolate | separated the frame. It is a case upper back perspective view of an entrance child machine with a camera. It is a case back upper surface perspective view of the state where a shaft support member was attached to a case.

Explanation of symbols

  1 ·· Camera, 6 ·· Camera window, 7 ·· Case, 10 ·· Lens, 14 ·· Camera unit, 18 ·· Lens hole, 18a ·· Wall (blocking frame), 19 ·· Frame, 23 ·・ Rotating shafts, 26a, 26b. ・ Bearings, 28. ・ Tilt knobs.

Claims (2)

In the entrance unit with the camera of the interphone device provided with a camera for imaging a visitor and a camera angle change mechanism for changing the imaging direction of the camera,
In order to isolate the space between the camera window provided in the entrance unit case and the camera from the surroundings, a frame-like frame is attached around the lens of the camera, and the block is in contact with or close to the frame. A frame is provided on the camera window,
The facing surface of the frame member and the closed frame formed by providing the same curvature, the position of the center of curvature, Rutotomoni to match the rotation center of the camera angle changing mechanism, the frame of the rotation center And an entrance unit with a camera of an intercom device, which is arranged on the inner side of the case with respect to the closing frame and is provided with a curvature in a camera angle changing direction. The door unit with a camera for an intercom apparatus according to claim 1, wherein the frame has an arcuate surface forming a part of a sphere.

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