JP2010204293A - Camera device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera device which is fully given a vibration-proof function, and which avoids remarkable deterioration in image quality caused by image blur. <P>SOLUTION: In the camera device, a camera base 4 is held on a base for vibration-proofing 6 through a damper member 5, and a camera body 3 to which an imaging lens part 2 is mounted is attached to the camera base 4. By providing a ring member 10 fixed to a lens barrel portion of the imaging lens part 2 by a screw 13, and holding a ring holding part 11 attached to the ring member 10 on a support 8 by a shock absorber 9, the imaging lens part 2 is held on the base for vibration-proofing 6 through the shock absorber 9. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a television camera device that has a vibration isolation function and is used by being housed in a protective case, and more particularly, to a camera device suitable for monitoring in a place with a lot of vibration such as a road with a lot of traffic.

In recent years, the spread of surveillance systems using television devices has been remarkable. Especially, recently, the evaluation as a system that is greatly useful for crime prevention has increased. Therefore, there are a wide range of installation locations of cameras for surveillance systems, and as a result, the environment is quite poor. There is a demand for a camera (television camera) that functions reliably even under the conditions described above.
One of the performances required at this time is the enhancement of the so-called anti-vibration function that enables stable imaging even when vibration is applied to the camera. Has been proposed.

Also, at this time, it is common to store the camera in a case adapted to each function from the viewpoint of dustproof and moistureproof, and from the viewpoint of waterproofing for outdoor installation. In this case, the vibration isolator is often provided in the case.
An example of a conventional camera device provided with a vibration isolator in such a case will be described with reference to FIGS.

  5 and 6, 1 is a case, 2 is an imaging lens unit, 3 is a camera body, 4 is a camera base, 5 is a damper member, 6 is a vibration-proof base, and 7 is a spacer block for fixing. . 5 is a side view and FIG. 6 is a front view. At this time, the case 1 is shown in a cross section.

Here, first, the case 1 is adapted to the above-mentioned dust proof, moisture proof, drip proof, water resistance, etc., and is usually made in a box shape that can be opened and closed by a metal plate such as aluminum, and in this, the imaging lens unit 2 is housed and used for monitoring, for example.
At this time, the imaging lens unit 2 is usually attached to the camera body 3 by a predetermined mounting mechanism such as a bayonet mount.

Here, the camera body 3 is of a color CCD type, for example, is attached to a flat camera base 4, and is held on the anti-vibration base 6 via the damper member 5.
At this time, the camera body 3 is attached to the camera base 4 by using screws 14 and screwing the screws 14 through the holes provided in the camera base 4 into the attachment portion provided at the bottom of the camera body 3.

Thereafter, the camera body 3 is attached to the case 1 together with the imaging lens unit 2 by attaching the vibration-proof base 6 to the bottom of the case 1 via the spacer block 7.
The damper member 5 used at this time is a member generally provided in the market, and is made of, for example, a natural rubber material or an artificial resin rubber material, and is a member having a large internal friction loss and a high vibration damping effect. is there. A spring (metal spring) member may be used or may be used in combination.

  Therefore, by interposing this damper member 5 between the camera base 4 and the vibration isolating base 6, the damper member 5 functions as an insulator that absorbs the vibration applied from the vibration isolating base 6 and isolates it from the camera base 4. Thus, a camera device having an anti-vibration function can be obtained.

By the way, a camera usually requires an imaging lens. However, in recent years, even a high-performance lens has been provided at a relatively low cost. A high-performance and high-performance lens device is mounted, but in this case, the lens device is considerably heavier than the camera body.
However, it cannot be said that the above prior art takes into account an increase in the weight of the lens device, and there is a problem that it is difficult to sufficiently provide a vibration-proof function.

  Here, FIG. 7 shows a state when vibration as indicated by an arrow (A) is applied to the case 1 in the camera device according to the prior art. At this time, the imaging lens unit 2 Generally, the camera is mounted on the camera body 3 in a cantilever (cantilever) state by the mount mechanism. For this reason, the vertical vibration applied to the case 1 is attenuated by the damper member 5. Suppose that it has been added to the camera body 3 as indicated by an arrow (b) without being limited.

Then, in this case, the imaging lens unit 2 vibrates so as to incline up and down as indicated by the alternate long and short dash line, so that the elevation angle fluctuates. In addition, the elevation angle fluctuation causes even a slight image blur, unlike simple up / down / left / right translation. When image blurring appears, deterioration in image quality is inevitable.
At this time, as a general characteristic of the damper member 5, the anti-vibration function result is deteriorated with respect to vibration having a long period.
For this reason, in the prior art, the anti-vibration effect is insufficient with respect to the vibration in the low frequency region, and deterioration of image quality due to image blur becomes a problem.

In the low frequency region, resonance may occur in the vibration system including the damper member 5, and in this case, the image stabilization function is lost. The elevation angle variation is further increased, and a large deterioration in image quality due to image blur is unavoidable.
Therefore, the prior art has a problem that it is difficult to sufficiently provide a vibration-proof function.
An object of the present invention is to solve the above-described problems of the prior art, and to provide a camera device that is sufficiently provided with an anti-vibration function and does not have a risk of a large image quality deterioration due to image blurring.

  In order to solve the above-described problems, the present invention provides an anti-vibration base in a case, holds the camera base via a damper member on the anti-vibration base, and a lens is attached to the camera base. In the camera device to which the camera body is attached, a ring member that is inserted into the lens barrel portion of the lens and fixed to the lens, and attached to the ring member in a state of projecting radially from the outer periphery of the ring member. And a shock absorber connected to the ring holding portion, and the shock absorber is held by the vibration-proof base.

  According to the present invention, the ring member is attached to the imaging lens unit, and the ring member is held by the shock absorber that is a shock absorbing member. Therefore, even when the camera body vibrates, the elevation angle change of the imaging lens unit is changed. Accordingly, it is possible to easily provide a camera device that can be suppressed, and that is less likely to cause image quality degradation due to image blurring.

It is a perspective view which shows one Embodiment of the camera apparatus by this invention. It is a side view which shows one Embodiment of the camera apparatus by this invention. It is a front view which shows one Embodiment of the camera apparatus by this invention. It is a side view which shows an example of the camera apparatus by a prior art. It is a front view which shows an example of the camera apparatus by a prior art. It is explanatory drawing of the vibration in the camera apparatus of a prior art.

  Hereinafter, a camera device according to the present invention will be described in detail with reference to an illustrated embodiment. Here, FIG. 1 is a side view, FIG. 2 is a front view, and FIG. 3 is a perspective view. In these drawings, a case 1, an imaging lens unit 2, a camera body 3, a camera base 4, a damper member 5, and a vibration isolator. The base 6 and the spacer block 7 are the same as those of the camera device according to the prior art described with reference to FIGS. 4 and 5, and the case 1 is also shown in cross section. In FIG. 3, case 1 is removed.

  1 to 3, 8 is a column, 9 is a shock absorber, 10 is a ring member, 11 is a ring holding portion, 12 is an absorber support portion, and 13 is a lens fixing screw. This embodiment is unique and different from the prior art.

First, as clearly shown in FIG. 3, the support column 8 is a member having a T-shaped cross section, and is fixed to the vibration isolation base 6 with one end, that is, the lower end in the figure. As shown in the figure, the imaging lens unit 2 extends vertically along the side. At this time, as is apparent from FIG. 2, the notch is formed so as to avoid the camera base 4, and the camera base 4 is not contacted.
And the absorber support part 12 which became a pair of upper and lower sides with the predetermined space | interval in the part which has comprised the T-shaped bottom part of this support | pillar 8 is provided.

Next, the ring member 10 is made to have a predetermined diameter according to the diameter of the imaging lens unit 2 and is inserted into the lens barrel portion of the imaging lens unit 2 as shown in the figure, and then fixed to four lenses. The screw 13 is fixed and held on the imaging lens unit 2.
The ring member 10 is provided with a plate-like ring holding portion 11 so as to protrude in the radial direction from the outer periphery thereof. Here, as shown in the figure, it is attached with three screws.

Here, if the ring member 10 is held by the imaging lens unit 2, the ring holding unit 11 is just inserted between the upper and lower absorber support units 12 as shown in the figure. It is like that.
At this time, each of the shock absorbers 9 is attached to the absorber support part 12. At this time, the shock absorber 9 is attached to the upper absorber support part 12 so that the movable part is on the lower side. In the absorber support portion 12 on the side, the shock absorber 9 is attached so that the movable portion is on the upper side.

  Therefore, if the ring holding part 11 is placed between a pair of upper and lower absorber support parts 12 and fixed to the movable parts of the respective shock absorbers 9, the assembly is completed. The shock absorbers 9 are connected to the movable parts of the shock absorbers 9 via the 10 ring holding parts 11, and are further held from the shock absorbers 9 to the vibration isolation base 6 via the absorber support parts 12 and the columns 8. In this case, the imaging lens unit 2 is held by the image stabilization base 6 without the camera base 4 in the holding system of the camera body 3.

As a result, as described with reference to FIG. 5, since the vertical vibration applied to the case 1 was in the low frequency region, the damper member 5 was not completely damped, and as shown by the arrow (b), Even if vibration appears in the main body 3, the vibration of the imaging lens unit 2 is absorbed and attenuated by the shock absorber 9 held by the vibration isolation base 6.
Therefore, according to this embodiment, image blur due to vibration can be suppressed, and deterioration in image quality can be minimized.

  As a result, even if resonance appears in the vibration system including the damper member 5 and the camera base 6, in this embodiment, the imaging lens unit 2 is connected to the vibration isolation base 6 via the shock absorber 9. Since they are connected, there is no possibility of being affected by the resonance of the camera base 6. Therefore, in this case as well, image blur due to vibration can be suppressed, and deterioration in image quality can be minimized.

  Here, as the shock absorber 9 used in the above-described embodiment, for example, a device called an oil damper may be used, and in this case, the acquisition thereof is easy. There is almost no problem in terms of cost, and a camera device having an image stabilization function can be provided easily at a reasonable cost.

1 Case (Waterproof, drip-proof camera case)
DESCRIPTION OF SYMBOLS 2 Imaging lens part 3 Camera main body 4 Camera base 5 Damper member 6 Anti-vibration base 7 Spacer block 8 Strut 9 Shock absorber 10 Ring member 11 Ring holding part 12 Absorber support part 13 Lens fixing screw 14 Screw (screw for camera attachment)

Claims (1)

In a camera device in which a vibration-proof base is arranged in a case, the camera base is held on the vibration-proof base via a damper member, and a camera body having a lens attached to the camera base is attached.
A ring member inserted through the lens barrel portion of the lens and fixed to the lens;
A ring holding part attached to the ring member in a state of projecting radially from the outer periphery of the ring member;
A shock absorber connected to the ring holding portion;
A camera device configured to hold the shock absorber on the anti-vibration base.

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