JPH08102880A - Video camera for surveillance - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a surveillance video camera 10, 30 capable of displaying a normal photographed image on a monitor television regardless of how to install it by simply providing a single tripod screw 15a. [Structure] A surveillance video camera 10, 30 having a tripod screw 15a fixed to a camera housing 11, wherein the camera housing 11 includes an imaging element 20 and a taking lens
The taking lens 19 is attached to the camera body 12 in which the
The camera body 12 is incorporated into the camera housing 11 so as to rotate at least 180 degrees or more about the optical axis 22 and the restraining means 14 and 21a for restraining the relative rotation of the camera housing 11 are provided.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to surveillance video cameras.

[0002]

2. Description of the Related Art Generally, a surveillance video camera is provided with a tripod screw on the bottom surface of the camera housing. However, when the video camera is installed in a limited space such as one corner of the ceiling, the bottom surface of the camera housing faces up. If the tripod screw of the camera housing is screwed onto the screw part of the mounting bracket that is hung vertically from, the captured image of the surveillance video camera displayed on the monitor TV will be upside down compared to when it was shot with the bottom of the camera housing facing down. It becomes difficult to see. in this way,
If a tripod screw is provided only on the bottom of the camera housing, the captured image will be turned upside down depending on the installation method, so in order to eliminate such inconvenience, a surveillance video camera with tripod screws on the top and bottom surfaces of the camera housing is also practical Have been served. However, providing the camera housing with a plurality of tripod screws is a constraint in designing the external appearance of the camera.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is capable of displaying a normal photographed image on a monitor television by providing a single tripod screw, regardless of how it is installed. The purpose is to provide a camera.

[0004]

SUMMARY OF THE INVENTION The present invention is a surveillance video camera having a tripod screw fixedly mounted on a camera housing, wherein the camera housing has an image pickup device and a photographing lens attached to the camera body. The camera body is incorporated in the camera housing so as to rotate relative to the optical axis of at least 180 degrees, and the relative rotation of the camera housing is releasably restrained.

[0005]

According to the present invention, since the camera housing to which the tripod screw is fixed is rotated by 180 degrees or more with respect to the camera body in which the image pickup element and the photographing lens are assembled, the photographed image on the monitor TV is displayed. You can move the tripod screw to a position suitable for installing a video camera while maintaining the posture of the camera body so that the image will be displayed normally.
Therefore, since it is not necessary to provide a plurality of tripod screws, it is possible to avoid the tripod screws becoming a constraint in designing the camera body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 to 5 show a surveillance video camera 10 according to an embodiment of the present invention. The video camera 10 includes a cylindrical camera housing 11, a camera body 12, and a cylindrical lid 13. A flange 11a is provided on the bottom surface of the camera housing 11, and two through holes 11b for inserting the screws 14 are formed in the flange 11a. Both through holes 11b are arranged symmetrically with respect to the center line of the camera housing 11, that is, at intervals of 180 degrees. A male screw 11c is formed on the outer peripheral surface of the front end opening of the camera housing 11, and a bracket 15 having a tripod screw 15a formed at the center is fixed by a screw 16 to the outer peripheral portion of the camera housing 11. On the other hand, since a female screw to be screwed into the male screw 11c of the camera housing 11 is formed on the inner peripheral surface of the rear end opening of the lid 13, the lid 13 can be detachably attached to the front end opening of the camera housing 11. A transparent protective glass 17 is fitted on the front end opening surface of the lid.

The camera body 12 is a base frame 12
a, upper frame 12b, front frame 12c,
It consists of a rear frame 12d and each frame 12a-12
d is joined together. The base frame 12a has a pair of guide frames 12e having an arc-shaped cross section.
Are integrally press-molded. A circuit board 18 on which various electric circuit components are assembled is attached to the camera body 12. A photographing lens 19 is attached to the front surface of the front frame 12c, and an image sensor 20 is attached to the rear surface.
(See FIG. 2) is fixed. A circular guide plate 21 is fixed by spot welding to the rear frame 12d of the camera body 12. This guide plate 21
Is a camera housing 1 as shown in the enlarged view of FIG.
It has an outer diameter approximately equal to the inner diameter of 1. The taking lens 19 is arranged and fixed on the front frame 12c so that its optical axis 22 coincides with the center of the guide plate 21. Four screw holes 21 a are formed in the peripheral portion of the guide plate 21. The screw holes 21a are arranged at intervals of 90 degrees around the optical axis 22 of the taking lens 19. In addition, the guide plate 21 is shown in FIGS.
As shown in, a power switch 23, a power cord 24, and an output terminal 25 for connecting the monitor television and the video camera 10 are attached.

The surveillance video camera 10 according to the present embodiment.
Inserts the camera body 12 from the front end opening of the camera housing 11, inserts a screw 14 into a through hole 11b provided on the bottom surface of the camera housing 11, and screw the screw 14 into a screw hole 21a of the guide plate 21 to form a camera. Housing 11
Is fastened to the camera body 12, and then the lid 13 is put on the front end opening of the camera housing 11 for assembly. Therefore, according to the present embodiment, if the screw 14 is removed, the camera housing 11 to which the tripod screw 15a is fixedly installed becomes the guide plate 21 of the camera body 12 and the guide frame 1.
Since the camera body 12 is guided by the 2e and rotates relatively, the tripod screw 15a is fixed to the camera body 12 as shown in FIGS. 2 and 3 while keeping the posture of the camera body 12 so that the captured image is properly displayed on the monitor TV. It can be moved from a position directly below 12 to a position rotated by 90 degrees as shown in FIG. 4, or moved to a position rotated by 180 degrees as shown in FIG. In this way, one of four positions can be selected by shifting the position of the tripod screw 15a by 90 degrees, which makes it easy to install the video camera 10 in a limited space such as a corner of the ceiling. Further, since it is not necessary to provide a plurality of tripod screws 15a, it is possible to avoid the tripod screw from becoming a constraint in designing the external appearance of the camera body 11. In the embodiment described above, the external shape of the camera housing is a cylindrical shape, but it is also possible to adopt a box shape having a rectangular or polygonal cross section.

Next, FIG. 6 shows a surveillance video camera 30 according to another embodiment of the present invention.
, The flange 31 on the bottom of the camera housing 31
A pair of arcuate elongated holes 31b are formed in a. Both the long holes 31b are arranged symmetrically with respect to the center line of the camera housing 31, and the center angle W thereof is set to 45 degrees or more. On the other hand, the guide plate 33 fixed to the camera body 32 has eight screw holes 33a in its peripheral portion.
Since they are formed at intervals of 45 degrees, the camera housing 31 can be fastened and integrally connected to the camera body 32 by screwing the screws 14 into the screw holes 31a through the long holes 31b. Since the other constituent members are the same as those in the embodiment described with reference to FIGS. 1 to 5, the description thereof will be omitted. Thus, according to the video camera 30 having such a configuration, the camera housing 31 can be fixed to the camera body 32 by tightening it at an arbitrary rotational position. Therefore, the tripod screw can be moved to an arbitrary position while maintaining the posture of the camera body 32 so that the captured image is normally displayed on the monitor TV.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a surveillance video camera according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the video camera.

FIG. 3 is a perspective view of the video camera seen from behind.

FIG. 4 is a perspective view of the video camera seen from behind.

FIG. 5 is a perspective view of the video camera seen from behind.

FIG. 6 is an exploded perspective view showing a main part of a surveillance video camera according to another embodiment of the present invention.

[Explanation of symbols]

10 ... Surveillance video camera, 11 ... Camera housing,
11a ... Flange, 11b ... Through hole, 11c ... Male screw, 1
2 ... Camera body, 12a ... Base frame, 12b ...
Upper frame, 12c ... Front frame, 12d ...
Rear frame, 12e ... Guide frame, 13 ... Lid, 1
4 ... Screw, 15 ... Bracket, 15a ... Tripod screw, 16
... Screws, 17 ... Protective glass, 18 ... Circuit board, 19 ... Photographing lens, 20 ... Imaging element, 21 ... Guide plate, 2
1a ... screw hole, 22 ... optical axis, 23 ... power switch, 24
... power cord, 25 ... output terminal, 30 ... surveillance video camera, 31 ... camera housing, 31a ... flange, 3
1b ... elongated hole, 32 ... camera body, 33 ... guide plate, 33a ... screw hole.

Claims (1)

[Claims] 1. A surveillance video camera having a tripod screw fixed to a camera housing, wherein the camera housing has at least 180 with respect to an optical axis of the taking lens with respect to a camera body in which an imaging device and a taking lens are assembled. A surveillance video camera, characterized in that a camera body is built into a camera housing so as to rotate relative to each other by more than one degree, and a restraining means for restraining relative rotation of the camera housing is provided.