JPH0535381Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Technical Field" The present invention relates to the structure of an eyepiece for binoculars or a monocular.

"Prior art and its problems" Figures 3 to 5 show the structure of the eyepiece of conventional binoculars. A frame 14 is screwed together with screws 15. When the eyepiece frame 14 is rotated according to this screw 15,
The lens frame 14 moves in the optical axis direction to adjust the diopter.

The light-shielding eyepiece 16 has a cylindrical shape that is fitted around the outer periphery of the eyepiece frame 14, and a ring portion 16a at the rear end contacts the observer's eye.

This light-shielding eyepiece 16 is made of an elastic material such as rubber, but the ring portion 16a of the conventional product is thin, and even if the rear end is rounded, it inevitably becomes an acute angle. For this reason, there was a problem in that the touch around the eyes was sharp and likely to cause discomfort. Furthermore, since there is a limit to deformation, a sufficient light-shielding effect may not be obtained.

``Purpose of the invention'' The object of the invention is to obtain an eyepiece mechanism that more flexibly fits the observer's eye area and also sufficiently functions as a light shield. In particular, the present invention aims to provide an aiming mechanism that has a low surface pressure on the user and that satisfies the conflicting demands of shape retention and deformability in a well-balanced manner.

"Summary of the invention" The present invention provides binoculars or monoculars in which the eyepiece frame holding the eyepiece is provided with a light-shielding eye made of an elastic material and surrounding the eyepiece. a fixed cylindrical part fixed to the outer periphery; an outer cylindrical part extending rearward from the fixed cylindrical part; and a cylindrical part bent inward from the rear end of the outer cylindrical part, which fits around the eye area of the user. A flat part extends in a direction substantially perpendicular to the optical axis and extends forward from the inner end of this flat part at a substantially right angle and comes into contact with the rear end surface of the eyepiece frame in a free state. An inner circumferential cylindrical lip portion having a uniform thickness is provided, which forms an annular space between the flat portion and the eyepiece frame. It is characterized in that when it comes into contact with the periphery of the eye and is elastically deformed, at least a portion thereof is elastically deformed to allow air to flow between the annular space and the outside.

According to this configuration, since the flat portion having a large area comes into contact with the area around the user's eyes, the contact surface pressure can be reduced. While the outer cylindrical part is fixed, the inner cylindrical lip part is in free contact with the rear end surface of the eyepiece frame, and this inner cylindrical lip part has a uniform thickness. Since it is a material, it is possible to obtain an aiming mechanism that has both shape retention and flexibility in a well-balanced manner. When the flat part comes into contact with the eye and is elastically deformed, at least a part of the inner circumferential cylindrical lip part is elastically deformed to allow air to flow between the annular space and the outside, so the whole part is easily deformed. The light-shielding eyepiece fits well to the shape of the eye.

``Embodiments of the invention'' The invention will be described below with reference to illustrated embodiments. FIGS. 1 and 2 show an embodiment of the present invention, and show a cross section of a portion corresponding to the conventional device shown in FIG.

The light-shielding eyepiece 20 of the present invention is attached to the outer periphery of the eyepiece frame 14 like the conventional product. This light-shielding eyepiece 20 has an annular hollow portion 2 at the rear end portion of a fixed cylindrical portion 21 that is attached to the outer periphery of the eyepiece frame 14.
2, this annular hollow part 22 includes a thin outer circumferential cylindrical part 22a extending further rearward from the fixed cylindrical part 21, and a thin outer circumferential cylindrical part 22a bent inward at a substantially right angle from the rear end of this outer circumferential cylindrical part 22a. It has a flat part 22b formed in a direction substantially perpendicular to the optical axis, and a cylindrical lip part 22c bent forward at a substantially right angle from the inner end of this flat part 22b. The cylindrical lip portion 22c is formed to have a uniform thickness, and its tip is in contact with the rear end surface of the eyepiece frame 14 in a free state. Therefore, an annular space 23 is formed between the outer circumferential cylindrical portion 22a, the plane portion 22b, the cylindrical lip portion 22c, and the rear end surface of the eyepiece frame 14.

The width W of the flat portion 22b is set so that the surface pressure applied to the user's eyes is sufficiently low. Specifically, when the thickness is set to about 3.5 to 10 mm, a preferable usability can be obtained.

That is, in use, the above-mentioned eyepiece mechanism of the binoculars puts the flat part 22b of the annular hollow part 22 against the eye part and presses it with an appropriate force. Then, the flat part 22b deforms according to the shape of the eye, and the outer circumferential cylindrical part 22a and the cylindrical lip part 22c deform and fit as shown in FIG. At this time, since the force applied to the eye is dispersed to the flat part 22b of width W,
The surface pressure is lowered and a preferable feeling of use is obtained. At the same time, the original function of blocking unnecessary and harmful external light is further enhanced. Furthermore, since the outer cylindrical portion 22a on the outer circumferential side is fixed and the tip of the inner circumferential lip portion 22c on the inner circumferential side is in free contact with the rear end surface of the eyepiece frame 14, the outer circumferential A well-balanced shape retention property due to the cylindrical portion 22a and flexibility mainly due to the inner peripheral lip portion 22c can be obtained. It is thought that the flat portion 22b affects both shape retention and flexibility.

Further, the cylindrical lip portion 22c is formed to have a uniform thickness, and the tip thereof freely contacts the eyepiece frame 14, so that the annular hollow portion 22 can be easily formed, and the annular space can be easily formed. Since the air inside 23 easily escapes to the outside, it is easily deformed.

Note that the front shape of the annular hollow portion 22 is not limited to a cylinder, but may be an appropriately irregular annular shape adapted to the human eye. Further, although the present invention has been described above with respect to binoculars, it can be similarly applied to monoculars.

``Effects of the invention'' As described above, when the flat part comes into contact with the irregularly shaped face of a person, the light shielding aim of the present invention increases the contact area with the person's face and lowers the contact surface pressure. can be blended well into the face. The outer cylindrical portion is fixed, the inner cylindrical lip is in free contact with the rear end surface of the eyepiece frame, and the inner cylindrical lip has a uniform thickness. Since it is easily deformed and allows air to circulate between the annular space for light-shielding purposes and the outside, it is possible to obtain an eye mechanism that has both shape retention and flexibility in a well-balanced manner.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the aim mechanism of the present invention, Fig. 2 is a sectional view of the same deformed state, and Fig. 3 is an example of a conventional aim mechanism. 4 is a plan view of the entire binoculars, and FIG. 5 is a front view thereof. DESCRIPTION OF SYMBOLS 11... Eyepiece part, 12... Fixed frame, 14... Eyepiece frame, 20... Light-shielding eyepiece, 21... Fixed cylindrical part, 22... Annular hollow part, 22a... Outer peripheral cylindrical part, 22b ...Plane part, 22c...Inner peripheral cylindrical lip part.

Claims (1)

[Scope of Claim for Utility Model Registration] Binoculars or monoculars in which an eyepiece frame holding an eyepiece is provided with a light-shielding eye made of an elastic material and surrounding the eyepiece, wherein the light-shielding eye is attached to the eyepiece frame. a fixed cylindrical part fixed to the outer periphery of the fixed cylindrical part; an outer cylindrical part extending rearward from the fixed cylindrical part; A flat part in a direction substantially perpendicular to the optical axis that comes into contact; Extends forward from the inner end of this flat part at a substantially right angle and comes into contact with the rear end surface of the eyepiece frame in a free state; an inner circumferential cylindrical lip portion having a uniform thickness and forming an annular space between the eyepiece frame and the eyepiece frame together with the flat portion and the flat portion; An eyepiece mechanism for binoculars or a monocular, characterized in that when it comes into contact with the periphery of a user's eyes and is elastically deformed, at least a part of the eyepiece mechanism is elastically deformed to allow air to circulate between the annular space and the outside.