JPH0113481Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a video camera, and more particularly to the attachment of a lens to a cabinet.

BACKGROUND TECHNOLOGY AND PROBLEMS First, a conventional video camera will be explained based on FIGS. 1 and 2.

A cabinet 2 of this video camera 1 is molded from synthetic resin and consists of upper and lower halves 3 and 4 divided into upper and lower halves, and a lens 5 is mounted inside the cabinet 2. This lens 5 is a zoom lens, and has a front part 5a consisting of a focus lens 6 etc. and a rear part 5b consisting of a master lens 7 etc., which are integrally formed.
A zoom motor 8, an iris meter 9, etc. are provided in the rear portion 5b. A flange 10 for attachment is integrally provided at the rear end portion 5c of the lens 5.

Next, the lens 5 configured as described above is fixed to a metal chassis 12 with screws 11 at the flange 10 portion of the rear end portion 5c. The chassis 12 is fixed to the lower half 4 with screws 13, and the upper half 3 is further connected to the lower half 4 with screws 14. In this way, the lens 5 is installed in the cabinet 2. At this time, the lens 5 is configured to protrude outward from semicircular arc-shaped parts 15 and 16 provided on the front walls 3a and 4a of the upper and lower halves 3 and 4, respectively. ing.

By the way, if the lens 5 is configured as described above and
The conventional video camera 1 to which the camera is attached has the following drawbacks.

That is, when the lens 5 is installed in the cabinet 2, a chassis 12 is required to fix the flange 10 of the lens 5. However, this chassis 12
Since it is made of metal and is heavy, it becomes an obstacle when trying to reduce the weight of the video camera 1, and the provision of a special chassis 12 has the drawback of increasing costs. Moreover, in order to mount the lens 5 in the cabinet 2, the flange 10 must first be fixed to the chassis 12, and then the chassis 12 must be fixed to the lower half 4. For this reason, attaching the lens 5 is extremely troublesome and requires a large number of assembly steps, which also has the disadvantage of increasing costs.

Purpose of the invention The present invention aims to provide a video camera that can correct the above-mentioned drawbacks.

Summary of the invention This invention provides a flange integrally with the lens, and provides fitting grooves for the flange on both halves of a cabinet constructed by joining a pair of halves. The video camera is constructed by sandwiching and fixing the flange between both fitting grooves, and no special structure such as a chassis for attaching the lens is required. Therefore, it is possible to reduce the weight of the video camera. Furthermore, cost reduction can be achieved by reducing the number of parts. Furthermore, since the lens can be attached by simply inserting the flange into the fitting groove, the attachment is extremely simple and costs can be reduced by reducing assembly man-hours.

Embodiment An embodiment in which the present invention is applied to a video camera will be described below with reference to FIGS. 3 to 5. Note that the first
Components that are the same as those of the conventional example shown in the figures and FIG.

First, as shown in FIG. 3, a flange 20 is integrally provided on the lens 5 of the video camera 1 at or near the center of gravity G in its longitudinal direction. This center of gravity position G is the front part 5
The lens 5 is located approximately in the middle of the entire length of the lens 5, which is comprised of the rear portion 5a and the rear portion 5b. Note that the rear end 5 of the lens 5
c is provided with an image sensor 21, a printed circuit board 22, etc., which are camera mechanism parts. On the other hand, the front wall 3 of the upper and lower halves 3 and 4 that constitute the cabinet 2
Ribs 23 and 24 are integrally formed on the inner surfaces of a and 4a. These ribs 23, 24 are formed in a substantially U-shape so as to surround the semicircular arc portions 15, 16 of the front walls 3a, 4a.
and the front walls 3a, 4a, respectively, a fitting groove 25,
26 are provided. Further, presser ribs 27 and 28 are integrally molded inside the upper and lower halves 3 and 4, respectively, and these presser ribs 27 and 28 are
This is a steady rest for the rear end portion 5c, and is not necessarily required.

Next, the video camera 1 is assembled using the lens 5 and the upper and lower halves 3 and 4 configured as described above. Thus, as shown in FIGS. 4 and 5, the lens 5 can be installed in the cabinet 2 very simply. That is, when the upper and lower halves 3 and 4 are butted against each other and connected by screws 14, the flange 20 of the lens 5 is sandwiched between the fitting grooves 25 and 26 provided in the upper and lower halves 3 and 4, respectively. When the upper and lower halves 3 and 4 are connected by screws 14, the lens 5 is securely fixed to the cabinet 2.

According to the video camera 1 of the present invention configured as described above and to which the lens 5 is attached, the flange 20 is first inserted into the fitting grooves 25 and 26 provided in the upper and lower halves 3 and 4, respectively. Since the lens 5 is fixed to the cabinet 2, a special structure such as a chassis for attaching the lens 5 is not required. Therefore, the weight of the video camera 1 can be reduced, and costs can also be reduced by reducing the number of parts. Furthermore, since the lens 5 can be attached by simply sandwiching the flange 20 between the fitting grooves 25 and 26, the attachment is extremely simple and costs can be reduced in terms of reducing the number of assembly steps.

Next, by providing the flange 20 at or near the center of gravity G of the lens 5, as shown in FIG. Even if the tip 5d of the lens 5 and the flange 2
0, the bending moment _{M 2 acting} on the flange 20 becomes smaller. Therefore, there is no need to make the flange 20 and its surrounding structure strong as in the conventional case, and the lens 5 can be made lighter and costs can be reduced. The mounting portion of the flange 20 can also be made lighter, and as a result, the overall weight and cost of the video camera 1 can be reduced. Furthermore, since the lens 5 is fixed at its center of gravity G with good weight balance, the performance of the lens 5 can be prevented from being adversely affected by its own weight.

In the embodiment, the flange 20 is provided at or near the center of gravity position G in the longitudinal direction of the lens 5, but the flange 20 is not necessarily limited thereto.
It may be closer to the rear portion 5b of the lens 5. Further, in the embodiment, the rib 23 provided with the fitting grooves 25 and 26,
24 are formed on the inner surfaces of the front walls 3a, 4a of the upper and lower halves 3, 4, but these ribs 23, 24 are integrally molded on the side wall portions and bottom wall portions of the upper and lower halves 3, 4 to form fitting grooves. It is also possible to provide one. Furthermore, the cabinet 2 is not limited to being divided into upper and lower halves, but may be constructed by being divided into left and right halves.

Effects of the invention The present invention provides a flange integrally with the lens, and provides fitting grooves for the flange on both halves of a cabinet constructed by joining a pair of halves. Since the video camera is constructed by sandwiching and fixing the flanges between the two fitting grooves, there is no need for a special structure such as a chassis for attaching the lens. Therefore, it is possible to reduce the weight of the video camera. Furthermore, cost reduction can be achieved by reducing the number of parts. Furthermore, since the lens can be attached by simply inserting the flange into the fitting groove, the attachment is extremely simple and costs can be reduced by reducing assembly man-hours.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional example of a video camera, in which Figure 1 is an exploded perspective view of the main parts;
FIG. 2 is a sectional side view of the cabinet in the assembled state. 3 to 5 show an embodiment of a video camera to which the present invention is applied, in which FIG. 3 is an exploded perspective view of the main parts, FIG. 4 is a perspective view of the assembled state, and FIG. FIG. 5 is a sectional side view of the cabinet in the assembled state. In the symbols used in the drawings, 1...video camera, 2...cabinet, 3...upper half, 4...lower half, 5...lens, 20...flange, 25...fitting groove, 26 ...A fitting groove.

Claims (1)

[Scope of utility model registration request] A flange is provided integrally with the lens, and fitting grooves for the flange are provided on both halves of the cabinet formed by joining a pair of halves, and when these two halves are joined, the above-mentioned fitting grooves are provided in both halves. A video camera characterized by being fixed by sandwiching flanges.