JP2920592B2 - Sighting telescope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a novel sighting telescope having a zooming mechanism capable of performing light zooming while maintaining stable aiming accuracy of the sighting telescope.

[0002]

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

The cam cylinder 54 is provided with two helical cam holes (not shown) in a direction inclined with respect to the optical axis 62. The inner cylinder 58 is inserted through the cam cylinder 54, The cam cylinder 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 direction of the optical axis 62.
56B is movable in the optical axis direction in the inner cylinder 58. Further, the zoom lenses 56A and 56B are connected to the inner cylinder 58.
The two pins 61 of the two supports 60 which are movably held in the inside respectively have two helical cam holes and two linear guide holes 5.
9 is inserted through two overlapping portions. With this configuration, the rotation of the cam cylinder 54 is controlled by the zoom lenses 56A,
The zooming is performed by converting the movement into the movement of 6B in the direction of the optical axis 62. Conventionally, the aiming telescope 50 exclusively uses the above-described zooming mechanism.

[0004]

In the conventional zooming mechanism of the aiming telescope 50, the rotation of the zoom ring 51 located outside the lens barrel 52 is performed by rotating the cam ring 54 located inside the lens barrel 52.
The lens barrel 52 is provided with an arc-shaped opening groove 55 in order to transmit power to the lens barrel. Moreover, this opening groove 55 is used for the aiming telescope 50.
With the optical axis 62 as the central axis, a wide-angle arc-shaped opening groove having a wide angle of, for example, about 300 degrees is formed. In addition, the opening groove 55 is located between the zoom lens 56B and the eyepiece 57, and is located in a direction orthogonal to the optical axis 62. Therefore, when an external force such as an impact acts on the lens barrel 52, there is a problem that the strength is locally reduced at the opening groove 55, particularly with respect to the external force in a direction orthogonal to the optical axis 62.

[0005] Therefore, often 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 57 are bent, and the optical axis 62 of the aiming telescope 50 is crooked. . The aiming telescope 50 has a problem that even a small amount of the above-mentioned krui has a great effect on the aiming accuracy, and the bullet does not hit the target. Further, in the conventional zooming mechanism, since the rotation angle of the cam cylinder 54 is limited to about 300 degrees of the opening angle of the opening groove 55, the helical cam hole provided in the cam cylinder 54 is required to obtain a required zoom magnification. It is necessary to reduce the tilt angle, sometimes
There is also a problem that an inclined portion that is close to being parallel to the optical axis 62 is formed, so that a large torque is required to rotate the zoom ring 51.

In order to solve the above-mentioned problems, the present invention eliminates a part where the strength is locally reduced in the lens barrel, stably maintains aiming accuracy, and has a aiming mechanism provided with a zooming mechanism capable of lightly performing zooming with a small torque. It aims to provide a telescope.

[0007] The present invention aiming telescope to achieve the above object, a sighting telescope comprising a zooming mechanism, the
Attach a zoom ring to the barrel connected to the barrel of the sighting telescope
The zoom ring is provided with an annular gear on the inner peripheral surface thereof, and a circumferential gear is provided on the outer peripheral surface of a cam cylinder rotatably provided in the lens barrel. Meanwhile, the cylinder
By providing an intermediate gear rotatably on the body and interposing this intermediate gear between the annular gear and the circumferential gear ,
The rotation of the zoom ring is transmitted to the cam barrel via the intermediate gear
It has a zooming mechanism configured to enable zooming of the aiming telescope .

[0008]

The aiming telescope according to the present invention is different from the aiming telescope provided with the conventional zooming mechanism, and since there is no opening groove in the lens barrel, an external force such as an impact acting between the lens barrel and the eyepiece is locally affected. No external force is exerted, and the external force is dispersed on average. Therefore, the optical axis of the zoom lens and the optical axis of the eyepiece 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 intermediate gear, the rotation angle of the zoom ring is not limited. Therefore, in order to move the zoom lens by a required distance, the cam cylinder can be provided with a spiral cam hole with a steep inclination angle with respect to the optical axis. Thereby,
The zoom ring can be easily rotated with a small torque.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the aiming 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 cut-away side sectional view of the aiming telescope of the present invention, and FIG. 2 is a front view showing a cut surface taken along line YY in FIG. In the drawing, reference numeral 1 denotes an aiming telescope of the present invention, and a zooming mechanism of the aiming telescope 1 is screwed into a lens barrel 2 and a screw 2A provided at an end of the lens barrel 2 shown in FIG. And a zoom ring 5 rotatably mounted on the cylindrical body 3.
A mounting ring 6 screwed with the screw 5B of the zoom ring 5,
Eyepiece 4 screwed to screw 3B of cylinder 3 and connected to cylinder 3
Is configured between.

The cylindrical body 3 is provided with a substantially cross-shaped small hole 3A, and the intermediate gear 7 is rotatably provided laterally in the small hole 3A with its axis parallel to the optical axis N of the bright sight telescope 1. Some of the teeth of the intermediate gear 7 slightly protrude from the outer peripheral surface and the inner peripheral surface of the cylindrical body 3. An annular gear 5 </ b> A provided on the inner peripheral surface of the zoom ring 5 meshes with an intermediate gear 7 provided on the cylinder 3.

In the lens barrel 2, a cam cylinder 9 is rotatably inserted into an inner cylinder 8 provided in the lens barrel 2, and a circumferential gear 9C provided at an end of the cam cylinder 9 has a cylindrical body. 3 is meshed with the intermediate gear 7. Further, two spiral cam holes 9A and 9B are provided on the peripheral side surface of the cam cylinder 9 at an angle that is slightly inclined with respect to the optical axis N. The zoom lenses 10A and 10B are movably provided in the inner cylinder 8 via the supports 11A and 11B, and the screw 12A of the support 11A is
A and the guide hole 8A provided in the inner cylinder 8 in parallel with the optical axis N are inserted into the overlapped portion, and similarly, the screw 12B is inserted into the overlapped portion between the cam hole 9B and the guide hole 8A. .

FIG. 3 is an exploded view of the zooming mechanism, which explains 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 attached to the lens barrel 2.
To the end of the outer peripheral surface. Next, a screw (not shown) provided on the inner peripheral surface of the end of the cylinder 3 is screwed into the screw 2 </ b> A of the lens barrel 2 and tightened to connect the cylinder 3 to the lens barrel 2. At this time, the intermediate gear 7 rotatably provided in the small hole 3A of the cylinder 3
Meshes with an annular gear 5A provided on the inner peripheral surface of the zoom ring 5. Subsequently, the mounting ring 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 ring 6 is inserted.
A is screwed into the gear 5B of the zoom ring 5 and tightened. With the above assembly, the zoom ring 5 is rotatably mounted on the lens barrel 2 outside the lens barrel 2, and the rotation of the zoom ring 5 is transmitted to the intermediate gear 7.

Further, as shown in FIG. 3, the inner cylinder 8 and the cam cylinder 9 in which the zoom lenses 10A, 10B are assembled so as to be movable in parallel with the optical axis N are used as the gear 3B forming the opening of the cylinder 3. The inner cylinder 8 is inserted into the lens barrel 2 from the edge, and the inner cylinder 8 is provided inside the lens barrel 2. At this time, the circumferential gear 9 at the end of the cam cylinder 9
C meshes with the intermediate gear 7. By the procedure described above, the zooming mechanism is assembled. The screw 3B of the cylindrical body 3 is a screw for screwing and connecting with the eyepiece 4 to assemble the aiming telescope 1 of the present invention.

The rotation of the zoom ring 5 is transmitted to the cam cylinder 9 via the intermediate gear 7 by the zooming mechanism having the above-described structure.
The rotation of the cam cylinder 9 is performed by the screws 12A and 12B and the support 11.
A, 11B, and zoom system lenses 10A, 10B
Is converted into a movement parallel to the optical axis N, and zooming of the aiming telescope 1 acts. In addition, since the rotation angle of the zoom ring 5 is not limited, the cam holes 9A and 9B of the cam barrel 9 are
May be provided at a steeply inclined angle. Therefore, the zoom ring 5 can be easily rotated with a small torque.
The above-described operation exerts an excellent effect particularly when the aiming telescope of the present invention is zoomed by a drive motor.

There is no local decrease in strength between the zoom lens 10B and the eyepiece 4A. The small holes 3A provided in the cylindrical body 3 do not cause a reduction in strength in practical use. Therefore, the aiming telescope of the present invention can stably maintain the aiming accuracy without being affected by an external force that is carelessly applied during operation. In the aiming telescope of the present invention, the intermediate gear may be provided on the lens barrel.

[0016]

According to the present invention, an aiming telescope having a zooming mechanism capable of smoothly performing zooming with a light torque while maintaining the aiming accuracy stably is provided. Demonstrate.

[Brief description of the drawings]

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

FIG. 2 is a front view showing a cut surface cut along a line YY in FIG. 1;

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

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

FIG. 5 is a front view showing a cut surface cut along the line XX in FIG. 4;

FIG. 6 is a partially-illustrated side view schematically showing an aiming telescope.

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) G02B 23/00 G02B 23/06 G02B 7/04-7/08

Claims (1)

(57) [Claims] 1. An aiming telescope provided with a zooming mechanism, wherein a zoom ring is attached to a cylinder connected to a lens barrel of the aiming telescope.
The zoom ring is rotatable with respect to the lens barrel, and the zoom ring is provided with an annular gear on the inner peripheral surface thereof. A gear is provided, and an intermediate gear is rotatably provided on the cylindrical body.
The particular is interposed between the annular gear and the circular circumferential gear
As a result, the rotation of the zoom ring is transmitted to the cam barrel via the intermediate gear.
Arranged so that the aiming telescope can be zoomed
An aiming telescope having a zooming mechanism.