JP2506805Y2 - Drip-proof camera - Google Patents

Description

[Technical field] The present invention relates to a so-called daily waterproof type drip-proof camera, and in particular, it has a breeze hole for communicating the inside and outside of the camera body, and a breathable non-water-permeable filter is provided in the breeze hole. It is related to the attached drip-proof camera.

“Prior Art and Problems Thereof” The applicant of the present invention has a camera body in which a breeze hole for communicating the inside and outside of the camera is formed in a camera in which the internal volume changes significantly, and the breeze hole does not allow ventilation. We proposed a drip-proof camera that was equipped with an aqueous filter to enable drip-proof cameras with large changes in internal volume. This drip-proof camera can perform zooming or focusing by balancing the atmospheric pressure inside and outside the camera with the breeze hole without increasing or decreasing the operating force due to the change in the internal volume.

By the way, the strength of the air-impermeable / water-impermeable filter is weak, and when exposed, there is a risk that the camera may be damaged when the camera is used. Therefore, it is conceivable to provide the camera body with a protective cover for protecting the ventilation / water-impermeable filter. Then, in this protective cover, a ventilation groove for ventilating the breathable water-permeable filter is formed, for example, in the vertical direction.

However, depending on the shape of this ventilation groove, water that enters from above (or below the ventilation groove when the camera is held upside down) collects in the portion corresponding to the ventilation / non-permeable filter and impedes its ventilation. . For example, as shown in FIG. 4, when the ventilation groove 21 extending in the up-and-down direction around the ventilation / water-impermeable filter 17 attached to the breeze hole 16 of the camera body 11 is formed in the same cross-sectional area in all parts, When a large amount of water penetrates from above, the water will flow into this ventilation groove. Therefore, the ventilation / water impermeable filter 17 (breeze hole 1
6) covers the entire surface, and the inside and outside of the camera body are not communicated with each other, which causes problems such as zooming and focusing not being possible.

"Purpose of Invention" The present invention has been made in view of the above-mentioned problems, and a drip-proof camera that does not impair the breathability of the breathing hole (breathable / non-permeable filter) even if water enters the ventilation groove. The purpose is to get.

[Outline of the Invention] In the present invention, the camera body is constructed in a watertight manner, and a breeze hole for communicating the inside and outside of the camera body is formed on the wall surface of the camera body, and a ventilation / water-impermeable filter is attached to the breeze hole. In the drip-proof camera, a protective cover for covering the front of the air-permeable and water-impermeable filter is provided, and a central communication groove corresponding to the air-permeable and water-impermeable filter is provided in the protection cover; an inlet ventilation communicated with the central communication groove. A groove; and, assuming that water has infiltrated from the inlet ventilation groove, an outlet ventilation groove is formed at a position where the water falls by gravity, and the cross-sectional area of the inlet ventilation groove and the outlet ventilation groove is defined as the breeze. The feature is that it is formed smaller than the cross-sectional area of the hole.

Therefore, for example, when zooming using the drip-proof camera, the lens barrel is moved forward and backward with respect to the camera body,
The internal volume of the body is changed to allow air to flow in and out through the aerated, water impermeable filter.

Further, when water is splashed on the camera and enters from the inlet ventilation groove, this water passes through the inlet ventilation groove and reaches the central communication groove. At this time, since the cross-sectional area of the breeze hole installed at the position corresponding to the central communication groove is larger than that of the inlet ventilation groove, the water from the upper ventilation groove will not pass through the ventilation non-water-permeable filter upper surface. Through a portion of the outlet vent groove. Therefore, the problem that the entire surface of the breeze hole (ventilation-impermeable filter) is covered with water does not occur.

"Embodiment of the Invention" The present invention will be described below with reference to illustrated embodiments. FIG. 1 is a view showing the outer appearance of a drip-proof camera 10 to which the present invention is applied, FIG. 2A is a schematic view showing a communication groove 20, and FIG. 2B is an upper ventilation groove 20b thereof.
FIG. 2C is a sectional view showing the lower ventilation groove 20c.

The camera body 11 of the drip-proof camera 10 is configured in a watertight manner,
In addition, the lens barrel 12 is provided so as to be watertight.
This lens barrel 12 is moved back and forth in the optical axis direction for zooming by a pair of zoom switches 13 installed on the upper surface of the camera body 11, and as a result, the internal volume of the camera body 11 including the lens barrel 12 changes. To do. A release button 21 is further provided on the upper surface of the camera body 11. Also,
A rear lid 34 is installed on the rear surface of the camera body 11 so as to be openable and closable.

A grip portion 14 is formed on the front surface of the camera body 11.
The side wall 15 of the grip portion 14 is formed with a breeze hole 16 (FIG. 3) for communicating the inside and outside of the camera body 11. A circular, water-repellent, air-permeable and water-impermeable filter 17 is attached to the outside of the breeze hole 16.

On the other hand, a protective cover 18 that covers the side wall 15 and protects the ventilation / water impermeable filter 17 is attached to the grip 14. As shown in FIG. 2A, the protective cover 18 has a communication groove 20 formed therein. Notches are formed in the upper and lower ends of the communication groove 20 so that the communication groove 20, that is, the ventilation / water-impermeable filter 17 is brought into contact with the outside air.
22 (FIG. 1) is formed.

The communication groove 20 has a circular central communication groove 20a formed at a position corresponding to the air-impermeable / non-water-permeable filter 17. Further, the communication groove 20 is formed above the central communication groove 20a in the figure, and the upper ventilation groove 20b communicated with the communication groove 20a (the inlet ventilation groove at the normal position of the camera, and when it is turned upside down). And a lower ventilation groove 20c formed by communicating with the communication groove 20a below the central communication groove 20a in the drawing.
(It is an exit ventilation groove at the regular position of the camera, and becomes an entrance ventilation groove when turned upside down).

The central communication groove 20a is formed in a circular shape corresponding to the breeze hole 16 (breathable water-impermeable filter 17), and its size is equal to or larger than that of the filter 17. further,
The cross-sectional areas of the upper ventilation groove 20b and the lower ventilation groove 20c are formed to be smaller than the cross-sectional area of the breeze hole 16. Therefore, even if water is splashed on the camera and enters from the upper ventilation groove 20b, this water is allowed to flow downward without covering the entire surface of the ventilation / water impermeable filter 17 corresponding to the breeze hole 16. . The same effect can be obtained when the camera 10 is turned upside down. That is, the water that has entered from the lower ventilation groove 20c facing upward flows on the ventilation impermeable filter 17 toward the upper ventilation groove 20b below without covering the entire surface of the breeze hole 16.

According to the drip-proof camera 10 having the above structure, when the lens barrel 12 is moved back and forth with respect to the camera body 11, the internal volume inside the body 11 and the lens barrel 12 changes. Then, air corresponding to the amount of change flows into and out of the body 11 through the communication groove 20, the ventilation / non-water-permeable filter 17, and the breeze hole 16 of the protective cover 18. Therefore, the operating force for moving the lens barrel 12 back and forth does not fluctuate due to changes in the internal pressure inside the body 11 and the lens barrel 12.

When water is applied to the camera 10 and water enters from the notch 22, this water passes through the upper ventilation groove 20b to the ventilation / water impermeable filter 17 and passes through the lower ventilation groove 20c, and the bottom notch 22 Emitted from. At this time, a ventilation non-water-permeable filter
The cross-sectional area of the breeze hole 16 to which 17 is attached is larger than the cross-sectional area of the upper ventilation groove 20b.
The water from the water flows like the water w shown in FIG. 2A without covering the entire surface of the breeze hole 16. Therefore, the breeze hole 16
The entire surface of the ventilation / water-impermeable filter 17 corresponding to is not covered, and problems such as impairing ventilation of the inside and outside of the camera body do not occur. This effect is the same when the camera 10 is turned upside down. That is, the water that has entered from the lower ventilation groove 20c facing upward flows toward the upper ventilation groove 20b below without covering the entire surface of the ventilation impermeable filter 17 corresponding to the breeze hole 16, so that in this case as well. The problem that the air permeability inside and outside the camera body is impaired is surely prevented.

[Advantage of Device] As described above, according to the drip-proof camera of the present invention, the ventilation / water-impermeable filter can be surely protected by the protective cover. Even if water is applied to the camera and enters through the inlet ventilation groove, the cross-sectional area of the inlet ventilation groove is formed to be smaller than the sectional area of the breeze hole. It flows without covering the entire surface of the water-permeable filter. Therefore, it is possible to reliably prevent a defect that the air permeability inside and outside the camera body is impaired.

[Brief description of drawings]

FIG. 1 is a perspective view showing the entire drip-proof camera according to the present invention, FIG. 2A is a schematic view showing a shape of a communication groove formed in a protective cover and a ventilation / water-impermeable filter, and FIG. 2B is a IIB of FIG. 2A. -Cross-sectional view taken along line IIB, Fig. 2C is a sectional view taken along line IIC-IIC in Fig. 2A, Fig. 3 is a cross-sectional side view of Fig. 2A, and Fig. 4 is a ventilation / water-impermeable structure that is the basis of the present plan. It is a figure which shows the structure of the communicating groove of a filter. 10 …… Drip-proof camera, 11 …… Camera body, 12 …… Lens tube, 14 …… Grip part, 15 …… Side wall (wall), 16 …… Breeze hole, 17 …… Ventilation / Water impermeable filter, 18… … Protective cover, 20 …… communication groove, 20a …… central communication groove, 20b …… upper ventilation groove, 20c …… lower ventilation groove, 22 …… notch.

Claims (1)

(57) [Scope of utility model registration request] 1. A drip-proof camera in which a camera body is watertightly formed, and a breeze hole for communicating the inside and outside of the camera body is formed on a wall surface of the camera body, and a breathable water-impermeable filter is attached to the breeze hole. A protective cover is provided to cover the front of the air-permeable and water-impermeable filter, and the protection cover has a central communication groove corresponding to the air-impermeable and water-permeable filter; an inlet ventilation groove communicated with the central communication groove; When it is assumed that water has entered the inlet ventilation groove, an outlet ventilation groove is formed at a position where this water falls by gravity, and the cross-sectional area of the inlet ventilation groove and the outlet ventilation groove is defined as the cross-sectional area of the breeze hole. A drip-proof camera characterized by being made smaller.