JP3210475U - Aquarium observation magnifier - Google Patents

Abstract

A magnifier suitable for magnifying and observing fish or the like in an aquarium is provided. A cylindrical loupe body 1 made of a flexible material and having a substantially frustoconical appearance, and an upper end side opening 3 and a lower end side opening 4 inside the cylindrical loupe body 1 are provided. And a convex lens 2 having an optical axis coinciding with the central axis of the cylindrical loupe body 1, a position between the mounting position of the convex lens 2 and the upper end side opening 3, and a mounting position of the convex lens 2. At least one of the positions between the opening 4 and the lower end side opening 4 is provided with at least two thin portions 5 along the circumferential direction in which the wall thickness of the cylindrical loupe body 1 is reduced. However, it can be bent in a bellows shape at the position of the thin portion 5. [Selection] Figure 1

Description

  The present invention relates to a loupe (aquarium observation loupe) suitable for magnifying and observing fish and the like in a glass aquarium.

The magnifying glass that has been marketed so far has a structure in which a glass convex lens is held inside a hard plastic cylinder (lens holding cylinder). There is a risk that the convex lens and the lens holding tube may be damaged and fall injured when it falls while being held in the hand, and it becomes bulky when not in use.
Also, in the aquarium, when using the loupe with the above structure to observe the fish in the aquarium, when the tip of the loupe hits the glass plate on the surface of the aquarium, an impact sound is generated and the fish to be observed escapes. There was also a problem.

As an instrument for enlarging and viewing small articles displayed in a glass case or a show window, or fish in an aquarium, for example, in Patent Document 1 below, it is fitted to the inner peripheral surface of an annular lens holder In this state, a lens with a suction cup is disclosed in which a convex lens is attached and a suction cup is attached to the observation object side (the side in contact with the glass plate at the time of observation) of the lens holder.
However, such a lens with a suction cup has a structure in which an annular lens holder exists so as to surround the outer peripheral (circumferential) edge of the convex lens, and the front and back surfaces of the lens are exposed. For this reason, there is a problem in that dirt easily adheres to the surface of the lens, is easily scratched, and the lens may be damaged when dropped.

  From the above situation, there is a demand for a magnifying glass that can be used safely even by children, can enlarge and observe fish in the aquarium, and has a structure that is not bulky when not in use.

JP-A-8-62514

  The present invention solves the above-mentioned problems in the prior art and does not break when dropped on the ground, and does not generate contact noise or shock vibration when it hits the glass surface of the aquarium, so it can be folded easily when not in use. It is an object of the present invention to provide an aquarium observation loupe having a structure that can be reduced in size.

  The aquarium observation loupe according to the present invention is composed of a flexible material and has a substantially frustoconical appearance, and an upper end opening and a lower end opening inside the cylindrical loupe body. A convex lens having an optical axis that coincides with the central axis of the cylindrical loupe body, and a position between the convex lens mounting position and the upper end side opening, and a convex lens mounting position. At least one of the positions between the opening on the lower end side is provided with at least two thin portions with a reduced wall thickness of the cylindrical loupe body along the circumferential direction, and the wall surface of the cylindrical loupe body is The thin-walled portion can be bent into a bellows shape.

  Further, according to the present invention, in the aquarium observation loupe having the above characteristics, the material having the flexibility is styrene butadiene rubber, polyisoprene rubber, chloroprene rubber, acrylonitrile butadiene rubber, ethylene propylene rubber, butyl rubber, silicone rubber. , Selected from the group consisting of urethane rubber and fluororubber.

  Furthermore, in the aquarium observation loupe having the above-mentioned features, the present invention is characterized in that a thickness of the thin portion of the cylindrical loupe body is 0.03 to 0.1 mm.

  Further, the present invention provides the aquarium magnifying loupe having the above-described features, and further includes a lid member as a member for accommodating the cylindrical loupe main body, and the lid member opens at an upper end side of the cylindrical loupe main body. An upper lid having a shape that can be fitted while covering the entire surface, a lower lid having a shape that can be fitted while covering the entire lower end side opening of the cylindrical loupe body, and the upper lid A thin portion in a space formed when the upper lid and the lower lid are positioned in parallel with each other. The cylindrical loupe main body folded in a bellows shape at the position and contracted can be accommodated and fixed.

The aquarium observation loupe of the present invention has a cylindrical loupe body that holds a convex lens made of a flexible material such as rubber, so even if the loupe is accidentally dropped on the ground, The main body is not damaged and is safe. In addition, no contact sound or shock vibration is generated even when it touches the glass surface of the aquarium during observation, and even a small fish can be clearly enlarged and viewed, and children can observe the fish happily. .
Furthermore, when not in use, by applying force from above and folding the wall surface of the cylindrical loupe body into a bellows shape at the position of the thin wall portion, the external dimensions of the cylindrical loupe body can be reduced and not bulky. Convenient to carry.

(A), (b) is a figure which shows the internal structure of the magnifier for aquarium observation which concerns on one embodiment of this invention, (a) is when the cylindrical loupe main body 1 is extended (in use). The figure which shows an internal state of (b) is a figure which shows an internal state when the cylindrical loupe main body 1 is contracted (when not in use). It is a perspective view which shows the external appearance at the time of use of the cylindrical loupe main body 1 of FIG. 1 is folded in a bellows shape at the position of the thin portion 5, and the upper end side opening of the cylindrical loupe body 1 in this state is covered with the upper lid body 7 of the lid member 6, and the lower end side opening is covered. It is a perspective view which shows the external appearance of the magnifier for aquarium observation of this invention when it covers with the lower side cover body 8 of the cover member 6. FIG. It is a figure which shows the external appearance (left half) and internal structure (right half) at the time of accommodation fixation of the aquarium observation loupe of this invention illustrated in FIG. And the fitting state of the lid member 6 is shown.

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to those shown in the drawings.
As illustrated in FIG. 1A and FIG. 2, the aquarium observation loupe of the present invention includes a cylindrical loupe body 1 having a substantially frustoconical appearance, and an inside of the cylindrical loupe body 1. The cylindrical loupe body 1 is composed of a flexible material. The convex lens 2 has an upper end opening (an eyepiece side opening for viewing) inside the cylindrical loupe body 1. ) At a position between 3 and the lower end side opening (observation object side opening in contact with the glass plate of the aquarium) 4, it is attached so that the central axis of the cylindrical loupe body 1 coincides with the optical axis. .
In the present invention, as a structure for attaching the convex lens 2 to the inner wall surface of the cylindrical loupe body 1, as shown in FIGS. 1 (a) and 1 (b), the inner wall surface of the tubular loupe body 1 has a concave shape on the circumference. A structure in which a groove is provided and the outer peripheral portion of the convex lens 2 is fitted and fixed in the groove is preferable, but the structure is not limited to the attachment structure shown in FIGS.

And the position between the attachment position of the convex lens 2 and the upper end side opening 3 and the position between the attachment position of the convex lens 2 and the lower end side opening 4 of the cylindrical loupe main body 1 constituting the aquarium observation loupe of the present invention. At least one of the positions is provided with at least two thin portions 5 along the circumferential direction in which the wall thickness of the cylindrical loupe main body 1 is reduced (see FIG. 1A). Thus, the wall surface of the cylindrical loupe body 1 can be bent into a bellows shape (see FIG. 1B). The cylindrical loupe main body 1 illustrated in FIGS. 1A and 1B has a structure in which two thin portions 5 are provided on the upper side and the lower side of the mounting position of the convex lens 2, respectively. The appearance of the magnifying loupe main body 1 is not limited to that illustrated in FIGS.
In the present invention, the cylindrical loupe main body 1 can be compressed in the direction of the central axis (height direction) by the above-described wall surface structure, so that it is not bulky when not in use, and the cylindrical loupe main body 1 is centered at the time of use. It is made to extend in the direction as shown in FIG. FIG. 2 is a perspective view showing an external appearance of the cylindrical loupe main body 1 of FIG. 1 when used.
In addition, it is preferable that the thickness of the thin part 5 of the cylindrical loupe main body 1 in the present invention is 0.03 to 0.1 mm so that the thin part 5 can be easily bent into a bellows shape at the position of the thin part 5.

The tubular loupe main body 1 in the present invention is not damaged even when it falls on the ground, and contact noise and impact vibration are also generated when the lower end side opening 4 of the cylindrical loupe main body 1 hits the glass surface of the water tank. What is necessary is just to be comprised from the material which has the softness | flexibility (rubber elasticity) which does not arise. Specifically, preferable materials for the cylindrical loupe main body 1 include, for example, diene rubber (for example, styrene butadiene rubber, polyisoprene rubber, chloroprene rubber, acrylonitrile butadiene rubber), olefin rubber (ethylene propylene rubber, butyl rubber, silicone rubber). , Urethane rubber, fluorine rubber) and the like.
In addition, the cylindrical loupe body 1 made of such a flexible material is useful for effectively protecting the convex lens 2 attached to the inside from a shock at the time of dropping. The cylindrical loupe main body 1 can be produced by a simple molding method.

In the present invention, the convex lens 2 attached to the inside of the cylindrical loupe main body 1 may be a glass lens or a synthetic resin lens, but when a synthetic resin lens is used, There is little risk of breakage, and in particular, an acrylic resin lens is preferable because it is lightweight, its weight is about half that of a glass lens, and it has sufficient transparency.
The focal length of the convex lens 2 in the present invention can be appropriately selected according to the optimum distance to the observation object, but the general lens focal length is about 200 mm.

  In the aquarium observation loupe according to the present invention, as shown in FIG. 2, a string attaching portion 10 may be provided in the cylindrical loupe main body 1, and a hole is generally provided in this portion. By passing the string, the aquarium observation loupe can be hung from the neck, which is convenient.

  In the present invention, the aquarium observation loupe may further include a lid member 6 having an appearance and a cross-sectional structure as shown in FIG. 4, and the lid member 6 is an opening on the upper end side of the cylindrical loupe main body 1. 3, an upper lid 7 having a shape that can be fitted in a state of covering the entire surface 3, and a lower lid 8 having a shape that can be fitted in a state of covering the entire lower end side opening 4 of the cylindrical loupe main body 1. The connecting portion 9 connects the outer peripheral end of the upper lid 7 and the outer peripheral end of the lower lid 8. In FIG. 3, when the cylindrical loupe main body 1 of FIG. 1 is folded in a bellows shape at the position of the thin portion 5 and contracted, the upper end side and the lower end side opening of the cylindrical loupe main body 1 in this state are covered with the lid member 6. Is shown in a perspective view.

In the case of the aquarium observation loupe of the present invention shown in FIGS. 3 and 4, in the space formed when the upper lid body 7 and the lower lid body 8 are positioned parallel to each other, at the position of the thin portion 5. The cylindrical loupe body 1 in a state of being folded and contracted in a bellows shape can be accommodated in a fixed state. In such a state, the entire upper end side opening and the lower end side opening of the cylindrical loupe body 1 are respectively Since it is covered with the upper lid body 7 and the lower lid body 8, the adhesion of dirt to the convex lens 2 can be prevented.
The material of the lid member 6 is not limited because the cylindrical loupe body 1 is made of a material having flexibility (rubber elasticity), and even a material having flexibility has flexibility. However, a polypropylene resin, an acrylonitrile-butadiene-styrene (ABS) resin, or the like can also be used.
Hereinafter, the present invention will be described with reference to specific examples of the aquarium magnifying glass according to the present invention, but the present invention is not limited thereto.

Using a commercially available silicone rubber, a cylindrical loupe main body having a cross-sectional shape shown in FIG. 1A (in which a lens fitting groove along the circumferential direction is formed on the inner peripheral surface) was produced. The outer diameter of the cylindrical loupe body on the upper end opening side is 80 mm, the minimum opening inner diameter on the upper end side is 68 mm, the outer diameter on the lower end opening side is 115 mm, and when fully extended (the state shown in FIG. 1A). The height at was 64 mm. The inner diameter at the position where the groove for fitting the convex lens was provided was 89 mm, and the thickness of the thin portion of the cylindrical loupe body was 0.04 mm.
On the other hand, a commercially available glass convex lens (outer diameter: 90 mm, focal length is about 200 mm) was prepared as a convex lens.
As shown in FIG. 1 (a), the convex lens is fitted and fixed in the lens fitting groove of the cylindrical loupe body, and the aquarium observation loupe of the present invention having the appearance shown in FIG. 2 is produced. did.

  When the fish in the aquarium was observed using this aquarium observation loupe, no contact sound was produced when it was brought into contact with the glass plate of the aquarium, and even a small fish could be clearly enlarged. Note that the height of the aquarium magnifying glass loupe was 27.5 mm when the cylindrical loupe body was compressed (the state shown in FIG. 1B).

  Further, a lid member having the shape shown in FIG. 3 (outer diameter of the upper lid body: 95 mm, outer diameter of the lower lid body: 117 mm) is produced, and as shown in FIG. When the water tank observation loupe in the state was accommodated, it was possible to prevent the dirt from adhering to the convex lens, and it was convenient to carry.

  The aquarium observation loupe of the present invention is convenient for observing small fish in an aquarium, and can also be used for observing fish in a domestic aquarium.

1 cylindrical loupe body 2 convex lens 3 upper end side opening (eyepiece side opening)
4 Lower end side opening (observation object side opening)
5 Thin-walled portion 6 Lid member 7 Upper lid body 8 Lower lid body 9 Connection portion 10 String attachment portion

Claims (4)

  A cylindrical loupe body composed of a flexible material and having a substantially frustoconical appearance, and is attached to a position between the upper end side opening and the lower end side opening inside the cylindrical loupe body, A convex lens having an optical axis coinciding with the central axis of the cylindrical loupe body, a position between the mounting position of the convex lens and the upper end side opening, and a position between the mounting position of the convex lens and the lower end side opening At least one of the thin wall portions of the cylindrical loupe body having a reduced wall thickness is provided along the circumferential direction, and the wall surface of the cylindrical loupe body has a bellows shape at the position of the thin wall portion. A magnifying glass magnifying glass that can be bent into two.   The material having flexibility is selected from the group consisting of styrene butadiene rubber, polyisoprene rubber, chloroprene rubber, acrylonitrile butadiene rubber, ethylene propylene rubber, butyl rubber, silicone rubber, urethane rubber and fluorine rubber. The aquarium observation loupe according to claim 1, characterized in that:   The aquarium magnifying glass according to claim 1 or 2, wherein a thickness of the thin portion of the cylindrical loupe body is 0.03 to 0.1 mm.   An upper lid body that further includes a lid member as a member for housing the cylindrical loupe body, the lid member having a shape that can be fitted in a state of covering the entire upper end side opening of the cylindrical loupe body; A lower lid having a shape that can be fitted in a state of covering an entire lower end side opening of the cylindrical loupe main body, and a connecting portion that connects an outer peripheral end of the upper lid and an outer peripheral end of the lower lid. The cylindrical loupe in a state where the upper lid body and the lower lid body are folded and contracted in a bellows shape at the position of the thin portion in a space formed when the upper lid body and the lower lid body are positioned parallel to each other The aquarium observation loupe according to any one of claims 1 to 3, wherein the main body can be housed and fixed.