JPH0714973Y2 - Aiming mechanism for optical equipment - Google Patents

Description

[Detailed Description of the Invention] a. Technical Field The present invention relates to a sighting mechanism of an optical device.

b. Prior art and its problems As a conventional eye device, for example, binoculars,
For example, there is one as shown in FIGS.

In FIGS. 4 and 5, 9 is the lens frame of the binoculars,
A cylindrical rubber eyecup 8 is attached to the outer circumference of the eyepiece 2 side. The end portion 8a of the rubber eyecup 8 serves as an eyepiece portion, and is set as shown in FIG. 4 during normal use, but when using it with glasses, turn it over to the main body side as shown in FIG. Keep it. Its function is to block external light and apply eye contact to the face to limit blurring.

However, in such a conventional eye contact mechanism, since the gum eye contact portion is turned upside down or returned, the rubber is easily deteriorated, and it cannot function as an eyepiece protection member when using binoculars. There was a point.

Further, in the above-described conventional eye contact mechanism, since the eye contact portion is fixed to the eyepiece side, it is not possible to adjust the positions of the eyepiece end portion of the eye contact portion and the eyepiece according to the visual acuity and the usage state of the user. There was a problem.

c. Purpose This invention has been made in view of such conventional problems, and an eyepiece frame of an optical device is provided with a tubular eyepiece part that is slidable in the axial direction with respect to the lens frame. An object of the present invention is to solve the above problems by providing a means for holding the eye contact portion at a desired drawing position and locking it at a predetermined drawing position.

d. Configuration of Embodiments Embodiments of the present invention will be described below with reference to FIGS. 1 to 3 of the drawings.

FIG. 1 is a sectional view along the optical axis around the eye contact portion showing an embodiment of the present invention, FIG. 2 is a partial inner surface developed view showing a part of the eye contact portion of FIG. 1, and FIG. 3 is FIG. FIG. 4 is a cross-sectional view taken along the optical axis showing a state where the eye contact portion is pulled out.

First, the structure will be described. 1 is a double cylinder with screws 7
It is a lens frame made of a cylindrical body stopped at several places, and the eyepiece 2 is fitted inside the lens frame.

Reference numeral 3 denotes a cylindrical rubber support member made of an elastic member, the inner diameter of which is larger than the outer diameter of the lens frame 1, and the lens frame is slidably fitted to the small diameter portion of the lens frame 1 on the eyepiece side. 1
You can move in and out of the eyepiece. A guide and a groove (not shown) are provided between the eyepiece rubber support body 3 and the lens frame 1, and the eyepiece rubber support body 3 is slidable with respect to the lens frame 1 only in the optical axis direction. I'm stuck. Further, two notches 3a, 3a parallel to the optical axis and close to each other as shown in FIG. 2 are bored on the inner peripheral surface of the eyepiece rubber support 3, and these notches 3a, 3a A convex portion 3c is formed in the center of the inside of the spring portion 3b formed between the portions 3a.

On the other hand, the sliding contact surface 1a of the small-diameter portion of the lens frame 1 is provided with the concave portion 1b into which the convex portion 3c is fitted. This recess 1b is
The eyepiece rubber support is provided at a position such that the eyepiece 2 can be easily seen when the eyepiece rubber support is pulled out and a face is applied to the eyepiece rubber 4. Also, the shape of the convex portion 3c is such that the eye-side surface 3d is perpendicular to the optical axis so that the eyepiece rubber support 3 does not come off from the lens frame 1, but the convex portion 3c slides on the objective-lens side surface 3e. In order to make it easy to ride on the surface 1a, it is inclined with respect to the sliding contact surface 1a.

When the convex portion 3c rides on the sliding surface 1a as shown in FIG. 1, the convex portion 3c is pressed against the sliding surface 1a due to the elasticity of the spring portion 3b, and the eyepiece rubber support 3 is attached to the lens frame. Locked to 1.

e. Operation of Embodiment Next, the operation of the embodiment configured as described above will be described.

When the eye contact part is stored, that is, in the state shown in FIG.
Since 3c rides on the sliding contact surface 1a, the spring portion 3b bends outward, apart from the other portions of the rubber contact support 3. In this state, due to the elasticity of the spring portion 3b, the top surface of the convex portion 3c is brought into pressure contact with the sliding contact surface 1a, and the elastic force causes the rubber eyecup support 3 to move to the lens frame 1
However, it can be slid in the optical axis direction by applying a force stronger than its elastic force.

If the eyepiece rubber support 3 is retracted to the position where it abuts the shoulder 1c of the lens frame 1 as shown in FIG. 1,
Since the total length of the optical equipment, here binoculars, is short, it can be easily stored in a case, etc., and the eye contact does not interfere even when using the eyeglasses.

On the other hand, during normal use, the rubber support member 3 is pulled out from the state shown in FIG. 1 to the state shown in FIG. In this way, when the convex portion 3c comes to the concave portion 1b, the convex portion 3c fits into the concave portion 1b with a click feeling due to the elasticity of the spring portion 3b. In this state, due to the eye-side surfaces 3d and 1d of the convex portion 3c and the concave portion 1b, the convex portion 3c does not come off from the concave portion 1b toward the eye side, and the eyepiece rubber support 3 does not come off from the lens frame 1.
In this state, an effect as a target can be obtained, and ambient light can be blocked.

Since the surface 3e of the convex portion 3c on the objective lens side is inclined, the spring portion 3b bends outward when the eye contact is pressed, and the convex portion
3c can ride on the sliding contact surface 1a.

Further, in the above-mentioned embodiment, the so-called click feeling is provided as described above, but the position to be locked by clicking may be provided in the state shown in FIG.

In addition, in this embodiment, the binoculars are described as an example,
Any optical device such as a telescope or microscope can be used.

f. Effects As described above, according to the present invention, it is provided with the tubular eyepiece lens frame and the tubular eyepiece portion slidably fitted in the eyepiece lens frame in the axial direction thereof. In an optical device, the eye contact portion is formed of an elastic member, and a cylindrical support body that is formed of an elastic member and is slidably fitted to the outer peripheral surface of the eyepiece lens frame in the axial direction of the eyepiece lens frame. And a cylindrical eyepiece member attached to the outer peripheral surface of the support body, the inner peripheral surface of the support body is always biased against the outer peripheral surface of the eyepiece lens frame, pressure contact, A convex portion that holds the eye contact portion at a desired drawing position with respect to the eyepiece lens frame is integrally provided on the support, and the eyepiece portion is provided on the outer peripheral surface of the eyepiece lens frame from the eyepiece lens frame in the axial direction thereof. Since there is a concave part to which the convex part fits when pulled out by a predetermined amount, The convex portion provided on the inner peripheral surface of the support body is constantly urged and pressed against the outer peripheral surface of the eyepiece lens frame, so that even when the convex portion is not fitted in the concave portion, the eye contact portion is used as the eyepiece frame. On the other hand, the eyepiece portion can be temporarily held at a desired drawing position, and the eyepiece portion can be locked by fitting the convex portion and the concave portion at a position where the eyepiece portion is pulled out from the eyepiece lens frame by a predetermined amount in the axial direction. it can.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the optical axis around the eye contact portion showing an embodiment of the present invention, FIG. 2 is a partial inner surface developed view showing a part of the eye contact portion of FIG. 1, and FIG. 1 is a sectional view taken along the optical axis showing the state where the eye contact portion of FIG. 1 is pulled out, and FIGS. 4 and 5 are sectional views taken along the optical axis around the eye contact portion used for explaining the conventional example. . 1: Lens frame, 1b: Recessed part 2: Lens, 3: Eye rubber support 3b: Spring part, 3c: Convex part 4: Eye rubber

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 55-144317 (JP, U) Shoko 48-35804 (JP, Y1) Minoru Sugita "Positioning Technology" (p.134-135) Showa 45 Published by Nikkan Kogyo Shimbun, October 31, 2016

Claims (1)

[Scope of utility model registration request] 1. An optical device comprising a tubular eyepiece lens frame and a tubular eyepiece portion slidably fitted in the eyepiece lens frame in the axial direction thereof. A cylindrical support member formed of a member and fitted to the outer peripheral surface of the eyepiece lens frame so as to be slidable in the axial direction of the eyepiece lens frame; and an elastic member attached to the outer peripheral surface of the support member. And an inner peripheral surface of the support member, which is constantly biased and pressed against the outer peripheral surface of the eyepiece lens frame, and the eyepiece portion with respect to the eyepiece lens frame. And a convex portion for holding at a desired pull-out position is integrally provided on the support, and the convex portion is formed on the outer peripheral surface of the eyepiece lens frame when the eye contact portion is pulled out from the eyepiece lens frame by a predetermined amount in the axial direction. An eye-applying mechanism for an optical device, which is provided with a recess for fitting with.