JPH0521220U - binoculars - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the manufacturing cost because the structure of the mounting portion of the objective side lid is relatively simple and the number of parts is small. [Structure] Two projections 31 and 31 are provided on an object side cover 30, and a fitting portion 11 into which the two projections 31 and 31 are fitted is provided on a mirror body 10. The two protrusions 31, 31 are formed of an elastic material, and among the side surfaces of the two protrusions 31, 31,
Slopes 32, 32 are formed on the side surface farther from the other projection 31 so that the mutual distance between the side surfaces increases from the tip end of the projection toward the base of the projection. The fitting portion 11 has a smooth surface 1 on which the inclined surfaces 32, 32 of the two protrusions are in pressure contact.
2, 12, the mutual spacing between the smooth surfaces 12, 12 is smaller than the mutual spacing between the inclined surfaces 32, 32 on the base side of the two protrusions 31, 31. The objective tube 20 includes the objective tube 2
0 is screwed into the mirror body 10, the objective side cover 30 is attached to the mirror body 10.
A pressing surface 22 is formed to be pressed against.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to binoculars having an objective tube in which an objective lens is housed, a mirror body in which a prism and the like are housed, and an objective side lid that closes an opening on the objective tube side of the mirror body.

[0002]

[Prior Art]

 Conventional binoculars include, for example, those shown in FIG. In the binoculars, a key-shaped engaging projection 4 is provided on the objective side lid 3, a groove 2 for engaging with the engaging projection 4 is provided on the side of the mirror body 1, and the engaging projection 4 of the objective side lid 3 is provided. The objective side cover 3 is attached to the mirror body 1 so that the lens engages with the groove 2 of the mirror body 1, then the objective tube is screwed into the mirror body 1, and the objective side cover 3 is attached to the mirror body side surface of the objective tube. It is pressed against the body 1 and fixed. In addition to this, tap the mirror body to cut a plurality of screw holes for screw fixing, screw the object side cover to the mirror body, and then screw the objective tube into the mirror body. In some cases, the objective-side lid is pressed against the mirror-side surface of to fix the objective-side lid.

[0003]

[Problems to be solved by the device]

 However, in the former conventional technique, it is necessary to provide the object-side lid 3 with the key-shaped engaging projection 4 and the mirror body 1 with the groove 2, and therefore the structure becomes relatively complicated. Further, in the latter prior art, since it is necessary to provide a screw hole and screw the screw there, the number of manufacturing steps and the number of parts increase. As described above, the conventional technique has a problem that the structure of the mounting portion of the objective side lid becomes complicated, the number of parts increases, and the manufacturing cost increases.

The present invention has been made by paying attention to such a conventional problem, and the structure of the mounting portion of the objective side lid is relatively simple, and the number of parts is small, and the manufacturing cost is reduced. It is intended to provide binoculars that can be used.

[0005]

[Means for Solving the Problems]

 One of the objective side lid and the mirror body is provided with one or more projections, and the other is provided with a fitting portion into which one or more of the projections are fitted, and one or more of the above-mentioned binoculars for achieving the above object. Either one of the protrusion and the fitting portion is formed of an elastic material, and the fitting portion has a smooth surface on which one or more side surfaces of the protrusion are in pressure contact, and one or more of the smooth surfaces. The widths of the parts of the projections that are in pressure contact with each other are smaller than the widths of the parts of one or more side surfaces of the projections that are in pressure contact with the smooth surface, and the objective tube is attached to the base of the male screw of the objective tube. The invention is characterized in that a pressing surface for pressing the objective side lid against the mirror body when screwed into the mirror body is formed. Here, the distance between the side surfaces of the one or more protrusions that are in pressure contact with the smooth surface is smaller than the opening width of the fitting portion on the tip end side of the protrusion, and increases toward the protrusion base side. Is preferably formed.

[0006]

[Action]

 Here, for simplification of description, it is assumed that one or more protrusions are made of an elastic material and are provided on the objective side lid, and the fitting portion is provided on the mirror body. When assembling the binoculars, first, the objective side lid is pressed against the mirror body so that one or more protrusions fit into the fitting portion. Since the width of each of the one or more protrusions on the smooth surface of the fitting portion in pressure contact is smaller than the width of each of the one or more protrusions on the side surface in pressure contact with the smooth surface, the protrusions elastically deform and Fit in the fitting part with the width reduced and pressed against the smooth surface. Next, the objective tube is screwed into the mirror body, and the object side cover is pressed against the mirror body with the pressing surface of the objective tube.

In this way, the object side lid is firmly fixed to the mirror body by fitting the projection into the fitting portion and pressing the projection surface against the mirror body. Therefore, in the present invention, the structure is simplified, that is, a structure having a simple-shaped fitting portion having only a smooth surface, a simple-shaped projection to be fitted therein, and a pressing surface provided on the objective tube. In addition, since the number of parts is reduced, the manufacturing cost can be reduced.

[0008]

【Example】

 Hereinafter, one embodiment of the binoculars according to the present invention will be described with reference to FIGS. 1 to 6. As shown in FIGS. 1 and 6, the binoculars of the present embodiment include objective barrels 20 and 20 in which objective lenses and the like are housed, mirror bodies 10 and 10 in which prisms and the like are housed, and mirror bodies 10 and 10. The objective-side lids 30 and 30 that close the opening of the objective-side cylinder 10 are configured.

The objective side lid 30 is made of resin. Two projections 31 and 31 made of the same resin are provided on the side of the objective side cover 30 that faces the mirror body 10. Of the side surfaces of the two protrusions 31 and 31, on the side surface farther from the other protrusion 31, as shown in FIG. 2 and FIG. The inclined surfaces 32, 32 are formed so as to become larger.

On the other hand, the lens body 10 is provided with a fitting portion 11 into which the projections 31, 31 of the objective side lid 30 are fitted. As shown in FIGS. 3 and 4, the fitting portion 11 is provided with smooth surfaces 12 and 12 on which the inclined surfaces 32 and 32 of the projections 31 and 31 are in pressure contact. The smooth surfaces 12 and 12 are integrally molded with a part of the mirror body 10 by metal such as aluminum die casting so as to be parallel to each other. By the way, the mutual distance between the inclined surfaces 32 and 32 at the tip of the protrusions 31 and 31 is L ₀ , the mutual distance between the inclined surfaces 32 and 32 at the base of the protrusions 31 and 31 is L _2, and the smooth surface of the fitting portion 11 is Assuming that the mutual distance between 12 and 12 is L ₁ , the length relationship between these mutual distances is L ₂ > L ₁ > L ₀ .

As shown in FIG. 1, a male screw 21 is formed on the outer periphery of the objective barrel 20 on the side of the mirror body 10. The male screw of the objective barrel 20 is attached to the mirror body 10 as shown in FIG. A female screw 13 to which 21 can be screwed is formed. At the base of the male screw 21 of the objective barrel 20, a pressing surface 22 is formed which pushes the objective side lid 30 against the barrel 10 when the objective barrel 20 is screwed onto the barrel 10.

Next, the operation of the present embodiment will be described while explaining the procedure for assembling the binoculars of the present embodiment. First, as shown in FIG. 4, the objective side lid 30 is arranged on the objective tube side of the mirror body 10 at a position where the projections 31, 31 of the objective side lid 30 can be fitted into the fitting portion 11 of the mirror body 10. Next, as shown in FIG. 5, the objective side cover 30 is pressed against the mirror body 10. At this time, the inclined surface spacing L ₀ at the tip of the protrusions 31, 31, because they are smaller than the smooth countenance each other spacing L ₁ of the fitting portion 11, projections 31, 31 enter easily fitting portion 11. When the objective-side lid 30 is further pressed against the mirror body 10, the mutual distance L ₂ between the inclined surfaces on the base side of the projections 31, 31 is larger than the mutual distance L ₁ between the smooth surfaces of the fitting portion 11, so that the elasticity is formed by resin. The protrusions 31 and 31 have elastic deformation, the distance between the inclined surfaces on the base side becomes small, and the protrusions 31 and 31 completely enter the fitting portion 11. At this time, part of the inclined surfaces 32, 32 of the protrusions 31, 31 are in pressure contact with the smooth surfaces 12, 12 of the fitting portion 11. Next, the objective tube 20 is screwed into the mirror body 10. In this process, the objective side lid 30 is pressed against the pressing surface 22 of the objective barrel 20 and fixed to the mirror body 10.

As described above, in this embodiment, the projections 31 and 31 of the objective side lid 30 are fitted in the fitting portions 11 of the mirror body 10, and the objective side lid 30 is fixed to the mirror body 10 by the objective tube 20. Since it is pressed, the objective side lid 30 can be firmly fixed to the mirror body 10 without play. Further, in this embodiment, the lens body 10 is provided with the fitting portion 11 having the simple smooth surfaces 12 and 12, and the objective side lid 30 is provided with the projections 31 and 31 having the inclined surfaces 32 and 32. Since only the pressing surface 22 is provided, the structure is relatively simple, the number of parts is reduced, and the manufacturing cost can be reduced.

Although two protrusions are provided in this embodiment, only one protrusion may be provided. At this time, it is needless to say that it is preferable to form inclined surfaces on both side surfaces of the projection or to form inclined surfaces on all side surfaces of the projection (in this case, the projection has a substantially conical shape). . Further, in this embodiment, the projection is provided on the objective side lid, but it may be provided on the mirror body and the fitting portion may be provided on the objective side lid. In general, the objective lid is often made of resin. In such a case, it is preferable that the fitting portion is made of resin and the protrusion is made of metal or the like. Further, in this embodiment, the inclined surface is formed on the projection in order to facilitate the insertion of the projection into the fitting portion, but this inclined surface may not be formed in order to further simplify the structure.

[0015]

[Effect of the device]

 According to the present invention, since the structure of the mounting portion of the objective side lid is relatively simple and the number of parts is small, the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of binoculars according to an embodiment of the present invention.

FIG. 2 is a rear view of an objective side cover according to an embodiment of the present invention.

FIG. 3 is a front view of a mirror body according to an embodiment of the present invention.

FIG. 4 is a sectional view of an essential part of an objective side lid and a mirror body according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part of an objective side lid and a mirror body according to an embodiment of the present invention.

FIG. 6 is a top view of binoculars according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part of a conventional objective-side lid and mirror body of binoculars.

[Explanation of symbols]

Reference numeral 10 ... Mirror body, 11 ... Fitting portion, 12 ... Smooth surface, 13 ... Female screw, 20 ... Objective barrel, 21 ... Male screw, 22 ... Pressing surface,
30 ... Object side lid, 31 ... Protrusion, 32 ... Inclined surface.

Claims (2)

[Scope of utility model registration request] 1. An objective tube having a male screw formed on the outer circumference,
A mirror body formed with a female screw into which the objective barrel can be screwed;
In the binoculars having an objective-side lid that closes the objective-side opening of the mirror body, one or more of the objective-side lid and the mirror body is provided with one or more protrusions, and the other has one or more protrusions. A fitting portion for fitting is provided, and one of the one or more protrusions and the fitting portion is formed of an elastic material, and the fitting portion has a smooth surface with which the side surfaces of the one or more protrusions are pressed. The width of the portion of the smooth surface where the one or more protrusions are in pressure contact is smaller than the width of the portion of the side surface of the one or more protrusions where the protrusion is in pressure contact with the smooth surface. Binoculars, characterized in that a pressing surface is formed on the base for pressing the objective side lid against the mirror body when the objective cylinder is screwed into the mirror body. 2. The one or more protrusions are arranged such that the distance between the side surfaces of the protrusions, which are in pressure contact with the smooth surface, is smaller than the opening width of the fitting portion on the tip end side of the protrusion and increases toward the protrusion base side. The binoculars according to claim 1, wherein the binoculars are formed so as to be large.