JPH07281101A - Sighting telescope - Google Patents

Abstract

PURPOSE:To stably maintain sighting accuracy and to lightly execute a zooming action with light torque by providing a sighting telescope with a zooming mechanism constituted so that a mediating gear is made to intervene between an annular gear and a circumferential gear provided on the inner peripheral surface of a zoom ring. CONSTITUTION:The zooming mechanism is constituted among a cylinder 3, the zoom ring 5 freely turnably attached to the cylinder 3, a fitting annular body 6 engaged with the screw 5B of the ring 5 and an eyepiece part 4 engaged with the screw 3B of the cylinder 3 and coupled to the cylinder 3. The mediating gear 7 is freely turnably provided by horizontally providing the shaft thereof in a small hole in parallel with the optical axis N of the sighting telescope 1. Besides, a part of the teeth part of the gear 7 is made to slightly project from the outer peripheral surface and the inner peripheral surface of the cylinder 3. The annular gear 5A provided on the inside circumferential surface of the ring 5 is meshed with the gear 7 provided on the cylinder 3. In a lens barrel 2, a cam barrel 9 is freely turnably inserted through an inner cylinder 8 provided in the lens barrel 2 and the circumferential gear 9C provided at the end part of the cam barrel 9 is meshed with the gear 7 provided on the cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a novel aiming telescope having a zooming mechanism capable of keeping the aiming accuracy of the aiming telescope stable and performing zooming lightly.

[0002]

2. Description of the Related Art The conventional zooming mechanism of a sighting telescope is
This will be described below with reference to FIGS. 4, 5 and 6. Conventionally, in the zooming mechanism of the aiming telescope 50, the zoom ring 51 is rotatably attached to the lens barrel 52 outside the lens barrel 52, and the screw 53 provided on the zoom ring 51 is attached to a cam in the lens barrel 52. Tube 5
4 and the zoom ring 51 is rotated to rotate the cam barrel 54 for zooming.
Therefore, the lens barrel 52 is provided with an arcuate opening groove 55, and the opening groove 55 serves as a guide passage for the screw 53. Further, the opening groove 55 is provided with a zoom system 56B of the zoom system lenses 56A and 56B of the sighting telescope 50 and an eyepiece lens 57.
And is located in the direction orthogonal to the optical axis 62 of the sighting telescope 50.

Further, the cam barrel 54 is provided with two spiral cam holes (not shown) in a direction inclined with respect to the optical axis 62, and the inner barrel 58 is inserted through the cam barrel 54. The cam barrel 54 is rotatable. The inner cylinder 58 is provided with a linear guide hole 59 for moving the zoom lenses 56A and 56B in the optical axis 62 direction.
56B is movable in the optical axis direction in the inner cylinder 58. Further, the zoom system lenses 56A and 56B are attached to the inner cylinder 58.
The two pins 61 of the two support members 60, which are movably held inside, respectively have two spiral cam holes and two linear guide holes 5.
It is inserted in two overlapping parts with 9. With this configuration, the rotation of the cam barrel 54 is controlled by the zoom lenses 56A, 5A and 5C.
Zooming is performed by converting the movement of 6B in the direction of the optical axis 62. Conventionally, in the aiming telescope 50, the above zooming mechanism has been used exclusively.

[0004]

In the conventional zooming mechanism of the sighting telescope 50, the rotation of the zoom ring 51 located outside the lens barrel 52 causes the cam barrel 54 located inside the lens barrel 52 to rotate.
The lens barrel 52 is provided with an arcuate opening groove 55 for transmission. Moreover, this opening groove 55 is used for the sighting telescope 50.
A wide-angle arc-shaped opening groove having a wide angle, for example, an angle of about 300 degrees with the optical axis 62 as the central axis. Moreover, the opening groove 55 is located between the zoom system lens 56B and the eyepiece lens 57, and is located in the direction orthogonal to the optical axis 62. Therefore, when an external force such as an impact is applied to the lens barrel 52, there is a problem in that the strength is locally reduced at the opening groove 55 particularly against the external force in the direction orthogonal to the optical axis 62.

Therefore, due to external force such as impact,
There is a problem that the lens barrel 52 is bent at the opening groove 55, the optical axes of the zoom lenses 56A and 56B and the optical axis of the eyepiece lens 57 are bent, and a ruin occurs on the optical axis 62 of the sighting telescope 50. . The aiming telescope 50 has a problem that the accuracy of aiming is greatly affected and the bullet does not hit the target even if the above-mentioned kluy is very small. Further, in the conventional zooming mechanism, the rotation angle of the cam barrel 54 is limited to about 300 degrees of the opening angle of the opening groove 55, so that the spiral cam hole provided in the cam barrel 54 has the same opening angle to obtain a required zoom magnification. The tilt angle needs to be relaxed, and sometimes
There is a problem that an inclined portion that is nearly parallel to the optical axis 62 is formed, and therefore a large torque is required to rotate the zoom ring 51.

In order to solve the above problems, the present invention eliminates a portion where the strength is locally reduced in the lens barrel, maintains stable aiming accuracy, and is equipped with a zooming mechanism capable of performing light zooming with a light torque. The purpose is to provide a telescope.

In order to achieve the above object, the aiming telescope of the present invention is an aiming telescope having a zooming mechanism, wherein a zoom ring is mounted on the outside of the lens barrel of the aiming telescope so as to be rotatable with respect to the lens barrel. , An annular gear is provided on an inner peripheral surface of the zoom ring, and a circumferential gear is provided on an outer peripheral surface of a cam barrel rotatably provided in the lens barrel, while the annular gear and the circumferential gear are provided. It is characterized by having a zooming mechanism in which an intermediary gear is interposed between. The intermediary gear is rotatably provided on a cylindrical body connected to the lens barrel, and the zoom ring is attached to the tubular body so as to be rotatable with respect to the lens barrel, and the intermediary gear is the annular shape. It is characterized in that it is interposed between the gear and the circumferential gear.

[0008]

The aiming telescope of the present invention is different from the conventional aiming telescope having the zooming mechanism, and since the lens barrel has no opening groove, external force such as an impact acting between the lens barrel and the eyepiece is locally generated. The external force is dispersed on average. Therefore, the optical axis of the zoom system lens and the optical axis of the eyepiece lens are not bent by an external force, and the aiming accuracy can be stably maintained. Since the rotation of the zoom ring is transmitted to the cam barrel via the intermediary gear, there is no limitation on the rotation angle of the zoom ring. Therefore, in order to move the zoom system lens by a required distance, the cam cylinder can be provided with the inclination angle of the spiral cam hole at a steep angle with respect to the optical axis. Thereby,
The zoom ring can be rotated easily with a small torque.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the sighting telescope of the present invention will be described below with reference to FIGS. 1, 2 and 3 focusing on a zooming mechanism. FIG. 1 is a partially cutaway side sectional view of the sighting telescope of the present invention, and FIG. 2 is a front view showing a cross section taken along line YY in FIG. Reference numeral 1 in the figure is an aiming telescope of the present invention, and the zooming mechanism of the aiming telescope 1 is shown in the figure, and the end of the body 2 is screwed into a body 2 and a screw 2A provided at the end of the body 2. And a zoom ring 5 rotatably attached to the tubular body 3.
And a mounting annular body 6 screwed with a screw 5B of the zoom ring 5,
Eyepiece 4 screwed onto the screw 3B of the cylinder 3 and connected to the cylinder 3.
It is composed between and.

The cylindrical body 3 is provided with a substantially cross-shaped small hole 3A, and the intermediary gear 7 is rotatably provided so that its axis is parallel to the optical axis N of the clear sighting telescope 1 and is horizontally provided in the small hole 3A. Some of the teeth of the intermediate gear 7 slightly project from the outer peripheral surface and the inner peripheral surface of the cylindrical body 3. An annular gear 5A provided on the inner peripheral surface of the zoom ring 5 meshes with an intermediate gear 7 provided on the cylindrical body 3.

In the lens barrel 2, a cam barrel 9 is rotatably inserted in an inner barrel 8 provided in the barrel 2, and a circumferential gear 9C provided at an end of the cam barrel 9 is a tubular body. It meshes with the intermediary gear 7 provided on the No. 3. In addition, two spiral cam holes 9A and 9B are provided on the peripheral side surface of the cam barrel 9 at an angle that makes a slight inclination with respect to the optical axis N. The zoom system lenses 10A and 10B are movably provided in the inner cylinder 8 via the support tools 11A and 11B, and the screws 12A of the support tool 11A are attached to the cam holes 9.
A is inserted into the overlapping portion of the guide hole 8A provided in the inner cylinder 8 in parallel with the optical axis N, and similarly, the screw 12B is inserted into the overlapping portion of the cam hole 9B and the guide hole 8A. .

FIG. 3 is an exploded view of the zooming mechanism to explain the assembly sequence. First, the zoom ring 5 is inserted from the end of the lens barrel 2 where the screw 2A is provided, and the zoom ring 5 is inserted.
Hang it on the edge of the outer peripheral surface. Next, a screw (not shown) provided on the inner peripheral surface of the end of the barrel 3 is screwed into the screw 2A of the lens barrel 2 and tightened to connect the barrel 3 to the barrel 2. At this time, the intermediate gear 7 rotatably provided in the small hole 3A of the cylindrical body 3
Engages with an annular gear 5A provided on the inner peripheral surface of the zoom ring 5. Subsequently, the mounting annular body 6 is inserted between the inner peripheral surface of the zoom ring 5 and the outer peripheral surface of the cylindrical body 3, and the gear 6 of the mounting annular body 6 is inserted.
Screw A onto gear 5B of zoom ring 5 and tighten. With the above assembly, the zoom ring 5 is rotatably attached to the lens barrel 2 outside the lens barrel 2, and the rotation of the zoom ring 5 is transmitted to the intermediary gear 7.

Further, as shown in FIG. 3, the inner barrel 8 and the cam barrel 9 in which the zoom lenses 10A and 10B are movably assembled in parallel with the optical axis N are left as they are, and the gear 3B forming the opening of the barrel 3 is provided. The inner cylinder 8 is installed inside the lens barrel 2 by inserting it from the edge into the lens barrel 2. At this time, the circumferential gear 9 at the end of the cam barrel 9
C meshes with the intermediate gear 7. The zooming mechanism is assembled by the procedure described above. The screw 3B of the cylindrical body 3 is a screw for assembling the sighting telescope 1 of the present invention by screwing and connecting with the eyepiece 4.

By the zooming mechanism having the above structure, the rotation of the zoom ring 5 is transmitted to the cam barrel 9 via the intermediary gear 7.
The rotation of the cam barrel 9 is performed by rotating the screws 12A and 12B and the support 11
Zoom system lenses 10A and 10B via A and 11B.
Is converted into a movement parallel to the optical axis N of, and zooming of the sighting telescope 1 acts. Moreover, since there is no limitation on the rotation angle of the zoom ring 5, the cam holes 9A and 9B of the cam barrel 9 are not attached to the optical axis N.
May be provided at a steep angle. Therefore, the zoom ring 5 can be lightly rotated with a small torque.
The above-described operation exhibits an excellent effect particularly when the aiming telescope of the present invention is zoomed by the drive motor.

There is no factor that locally reduces the strength between the zoom system lens 10B and the eyepiece lens 4A. The small hole 3A provided in the cylindrical body 3 does not practically cause a decrease in strength. Therefore, the aiming telescope of the present invention can stably maintain its aiming accuracy without being affected by an external force that is carelessly applied during operation. Further, in the sighting telescope of the present invention, an intermediate gear may be provided on the lens barrel.

[0016]

EFFECTS OF THE INVENTION The present invention provides a sighting telescope having a zooming mechanism capable of maintaining a stable aiming accuracy and performing a light zooming operation with a light torque, and providing a comfortable zooming effect and enhancing the accuracy of hitting a target. Exert.

[Brief description of drawings]

FIG. 1 is a partially cutaway side sectional view showing a zooming mechanism of a sighting telescope of the present invention.

FIG. 2 is a front view showing a cut surface taken along line YY in FIG.

FIG. 3 is an exploded view of a zooming mechanism of the sighting telescope of the present invention.

FIG. 4 is a partially cutaway side sectional view showing a zooming mechanism of a conventional aiming telescope.

5 is a front view showing a cut surface taken along line XX in FIG.

FIG. 6 is a partially transparent side view showing an outline of the sighting telescope.

[Explanation of symbols]

 DESCRIPTION OF THE SYMBOLS 1 Aiming telescope 2 Lens barrel 3 Cylindrical body 4 Eyepiece 4A Eyepiece 5 Zoom ring 5A Annular gear 7 Intermediary gear 8 Inner cylinder 9 Cam cylinder 9A Cam hole 9B Cam hole 9C Circular gear 10A Zoom system lens 10B Zoom System lens

Claims (2)

[Claims] 1. A sighting telescope having a zooming mechanism, wherein a zoom ring is rotatably mounted on the lens barrel outer side of the aiming telescope with respect to the lens barrel, and an annular gear is provided on an inner peripheral surface of the zoom ring. And a circumferential gear is provided on the outer peripheral surface of a cam barrel that is rotatably provided in the lens barrel, and a mediating gear is interposed between the annular gear and the circumferential gear. A sighting telescope having a mechanism. 2. The intermediary gear is rotatably provided on a cylindrical body connected to the lens barrel, and the zoom ring is attached to the cylindrical body so as to be rotatable with respect to the lens barrel. 2. The sighting telescope according to claim 1, wherein an intermediate gear is interposed between the annular gear and the circumferential gear.