JPH059702Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a waterproof endoscope in which the eyepiece of the endoscope has a watertight structure.

[Conventional technology]

2. Description of the Related Art Endoscopic cameras are known in which a camera is attached to an eyepiece of an endoscope to take images of the inside of a body cavity through an endoscope. When attaching this endoscope camera to an endoscope and taking pictures, the examiner's hands and fingers naturally come into contact with it, so
Endoscope cameras are sterilized by gas or immersed in a chemical solution to prevent the examiner's hands from being contaminated. Therefore, it is necessary to make the endoscope camera waterproof so that chemical solutions and the like do not enter into the camera even during the above-mentioned disinfection.

By the way, a conventional endoscope camera is composed of a camera mount attached to an eyepiece of an endoscope on a camera body, a camera eyepiece frame, and an eyecup attached to the camera eyepiece frame. An O-ring is interposed between the camera cover and the eyepiece frame that constitute the camera body to provide a waterproof structure.

[Problem that the invention attempts to solve]

However, in conventional endoscopic cameras, in order to create a watertight structure between the camera cover and the eyepiece frame that make up the camera body, a groove for an O-ring is provided in either the camera cover or the eyepiece frame. It is necessary to install an O-ring in the groove, resulting in a complicated structure and poor assembly workability.

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a waterproof endoscope that has a simple structure but can maintain a reliable watertight structure.

[Means and actions for solving problems]

This invention consists of a camera body that incorporates an imaging optical system, a viewfinder optical system, and a diopter adjustment mechanism, an eyepiece frame that is fixed to the camera body facing the diopter adjustment mechanism and has a cover glass, and a camera body and an eyepiece. The eyecup attachment part consists of an annular groove formed between the camera body and the eyepiece frame, one end engages with the eyecup attachment part, and the other end has a protruding hood that engages between the camera body and the eyepiece frame to create a watertight structure. This is a waterproof endoscope consisting of an eyecup and an eyecup.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the drawings.

1 to 3 show a first embodiment, and 11 is a camera body of an endoscope TV camera. This camera body 11 includes a front cover 12, a rear cover 13, and a gasket 1 interposed between the two.
4 in a watertight manner. The front cover 12 is provided with a camera mount 15 that is attached to an endoscope eyepiece (not shown), and the rear cover 13 is provided with a camera eyepiece 16. Furthermore, the camera body 11 includes an imaging optical system and a viewfinder optical system (both not shown).
is built-in.

Next, the camera eyepiece section 16 will be explained. The back surface 17 of the rear cover 13 is provided with an opening 18 and a surrounding frame 19 surrounding the opening 18. A diopter adjustment mechanism 20 is provided inside the camera body 11 facing the opening 18 . That is, 21 is a diopter main body formed in a cylindrical shape, and a threaded portion 23 is provided at one end thereof to be screwed onto the lens frame 22 of the viewfinder optical system. In addition, this diopter main body 21
The other end faces the opening 18, and a threaded portion 24 is provided on its outer peripheral surface. and,
The inner peripheral part of the connecting part 26 of the eyepiece frame 25 is screwed onto the threaded part 24 of the diopter main body 21, and this outer peripheral part is joined to the inner peripheral surface of the opening 18. The eyepiece frame 25 protrudes rearward from the back surface 17 of the rear cover 13, and the protruding portion is formed with a small diameter portion 27 and a large diameter portion 28 toward the rear.
Therefore, an annular groove 29 is formed by the back surface 17 of the rear cover 13, the surrounding frame 19, and the small diameter portion 27 of the eyepiece frame 25, and the outer circumference of the eyepiece frame 25, including the annular groove 29, can be used to attach an eyecup. Part 3
It constitutes 0. An eyecup 31 is fitted into the eyecup mounting portion 30. The eye cup 31 is formed of an elastic member such as rubber, and has a small diameter hole 32 corresponding to the small diameter portion 27 of the eyepiece frame 25 and a large diameter hole 33 corresponding to the large diameter portion 28 on its inner peripheral surface. are doing. Further, the front end of the outer peripheral portion of the eye cup 31 is provided with the surrounding frame 1.
There is a notch 34 corresponding to 9 and a hood 3 at the rear end.
5 is provided protrudingly. Also, this eye cup 31
An insert member 37 is embedded in the annular convex portion 36 corresponding to the small diameter hole 32 to suppress elastic deformation of the eye cup 31. In other words, the outer peripheral surface of the eye cup 31 is formed into a polygonal shape to match the shape of the rear cover 13 of the camera body 11 and give a sense of unity. Although there is a risk that a portion of the paper may turn over, the insert member 37 prevents this from happening. Furthermore, both sides of the annular convex portion 36,
That is, the back surface 17 of the rear cover 13 and the eyepiece frame 2
Ring-shaped seal portions 38, 38 are integrally molded with the eyecup 31 at portions corresponding to the side surfaces of the eyepiece 5, respectively, and the eyecup 31 seals the rear cover 13 and the eyepiece frame 25 in a watertight manner.

As described above, a cover glass 39 is watertightly attached to the eyepiece frame 25 which is watertightly sealed to the rear cover 13 by the eyecup 31, and the diopter body 21 facing the cover glass 39 is attached to the eyepiece frame 25 in a watertight manner.
A diopter frame 40 is installed inside the lens so that it can move forward and backward in the optical axis direction. This diopter frame 40 includes a plurality of eyepiece lenses 4.
1 is attached, and the spring 42a
is biased in the backward direction by Furthermore, a pin 42 is provided in a part of this diopter frame 40, and this pin 42 penetrates a cam groove 43 formed in the diopter main body 21 and projects to the outside, and this pin 42 is movable. It is connected to the frame 44. A diopter adjustment lever 45 is attached to the side wall of the rear cover 13 facing the moving frame 44 in a water-tight manner with an O-ring 46. It is interlocked with the moving frame 44. That is, the diopter can be adjusted by rotating the diopter adjustment lever 45 to move the movable frame 44 forward or backward, and by moving the diopter frame 40 forward or backward via the pin 42 that interlocks with the movable frame 44. It is configured as follows.

Next, the assembly order of the camera eyepiece section 16 will be explained based on FIG. 3. Fit the eyecup 31 from the front end side of the eyepiece frame 25, and
The small-diameter hole 32 and large-diameter hole 33 of the eye cup 31 are fitted into the small-diameter portion 27 and large-diameter portion 28 of the eyecup. Next, connect the connecting portion 26 of the eyepiece frame 25 to the back surface 17 of the rear cover 13.
into the opening 18 provided in the opening 1.
It is screwed and fixed to the threaded portion 24 of the diopter main body 21 facing 8. By screwing in the eyepiece frame 25, the annular convex portion 36 of the eyecup 31 is held between the back surface 17 of the rear cover 13 and the eyepiece frame 25. Therefore, the seal parts 38, 38 provided on both sides of the annular convex part 36 are pressed against and crushed by the rear cover 13 and the eyepiece frame 25, creating a watertight seal between them, and the eye cup 31 is sealed. Therefore, a waterproof camera can be constructed by sealing watertightly between the camera body 11 and the eyepiece frame 25.

FIG. 4 shows a second embodiment, in which the eyepiece frame and the eyecup are integrally molded. That is, 50 is an eyepiece frame formed in a cylindrical shape;
1 is an eye cup also formed into a cylindrical shape. An eyecup 51 made of an elastic member such as rubber is integrally formed with the eyepiece frame 50, and a ring-shaped seal portion 52 is integrally provided on the front end surface of the eyecup 51. With this configuration, by screwing the eyepiece frame 50 into the threaded portion 24 of the diopter main body 21 in the same manner as in the first embodiment, the seal portion 52 is brought into pressure contact with the back surface 17 of the rear cover 13. The eyecup 51 can make the rear cover 13 and the eyepiece frame 50 watertight.

In each of the above embodiments, an endoscope TV is used.
Although the camera has been described, the present invention is not limited to the above embodiment, and can be applied to various waterproof endoscopes that require waterproofing.

[Effect of idea]

As explained above, according to this invention, it is possible to create a watertight seal between the camera body and the eyepiece frame using the eyecup attached to the eyepiece frame, without using an O-ring or the like as in the conventional case. This has the effect of being able to reliably seal with a simple configuration.

[Brief explanation of the drawing]

Figures 1 to 3 show the first embodiment of this invention; Figure 1 is a cross-sectional plan view of the camera eyepiece, Figure 2 is a perspective view of the entire camera, and Figure 3 is the eyepiece frame. and an exploded perspective view of the eyecup, and FIG. 4 is a sectional view of a part of the camera eyepiece showing a second embodiment of this invention. 11... Camera body, 25... Eyepiece frame, 31...
...Aikatsupu.

Claims (1)

[Scope of utility model registration request] A camera body incorporating an imaging optical system, a viewfinder optical system, and a diopter adjustment mechanism, an eyepiece frame fixed to the camera body facing the diopter adjustment mechanism and having a cover glass, and a space between the camera body and the eyepiece frame. an eyecup attachment part consisting of an annular groove formed by a hood; and an eyecup that engages with the eyecup attachment part at one end and has a hood protruding from the other end and engages between the camera body and the eyepiece frame to ensure watertightness. A waterproof endoscope characterized by comprising: