Optical sighting device

Abstract

To perform adjustment to an optical sighting device more appropriately.SOLUTION: An optical sighting device 10 used by being attached to a gun, includes: an objective system 12 that forms an inverted image of a target on a first focal plane; an erection system 14 that forms an erect image obtained by inverting the inverted image on a second focal plane; and an adjustment mechanism 20. The erection system 14 has lenses 112 to 116 disposed between the first focal plane and the second focal plane, and a movable barrel 134 that is an erection system barrel that holds the lenses 112 to 116. The adjustment mechanism 20 is a mechanism that performs adjustment for tilting an axial direction of the movable barrel 134, and has: an advance / retract shaft 204 that is an advance / retract member that advances and retracts at one end of the movable barrel 134; and a spring 206 that is a double torsion spring that urges the movable barrel 134 toward the advance / retract shaft 204.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to optical sights. [Background technology]

[0002] Conventionally, optical sights equipped on hunting guns, sporting guns, etc. have been widely used (see, for example, Patent Document 1). Furthermore, optical sights that include an adjustment mechanism for adjusting the impact position, for example, have been widely used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-109448 Summary of the Invention [Problem to be solved by the invention]

[0004] In optical sights, for example, an objective system (objective optical system) forms an inverted image on a first focal plane, and an erect image obtained by inverting the inverted image into an erect image is formed on a second focal plane by an erection system (erection optical system), thereby allowing a user to visually recognize the image of a target. In addition, in such a configuration, for example, the erection system may require adjustment by tilting a cylindrical body that holds at least some of the lenses. In such cases, the wider the range over which the cylindrical body can be tilted, the wider the adjustable range (adjustment width of the optical sight). Therefore, a configuration that allows a wider range over which such a cylindrical body can be tilted has been desired. Therefore, an object of the present invention is to provide an optical sight that can solve the above-mentioned problems. [Means for solving the problem]

[0005] In an optical sight using a cylindrical body as described above, when adjusting the tilt of the cylindrical body, it is conceivable to tilt the cylindrical body using, for example, an advancing / retracting member that moves forward and backward at one end of the cylindrical body. In this case, when the advancing / retracting member retracts, it is conceivable to move the end of the cylindrical body in accordance with the movement of the advancing / retracting member, for example, by using a spring or the like that biases the cylindrical body toward the advancing / retracting member. The inventors of the present application, through extensive research, have found that the use of a double torsion spring in such a configuration can appropriately widen the adjustment range of the optical sight. Furthermore, through further extensive research, the inventors of the present application have found the features necessary to achieve this effect, leading to the present invention.

[0006] In order to solve the above problems, the present invention provides an optical sight that is attached to a gun and used, and includes an objective system that forms an inverted image of a target to be aimed at on a first focal plane, an erection system that forms an erect image that is an inverted version of the inverted image on a second focal plane, and an adjustment mechanism that adjusts the erection system, wherein the erection system has a lens disposed between the first focal plane and the second focal plane, and an erection system tube that is a cylindrical body that holds the lens, and the adjustment mechanism is a mechanism that adjusts by tilting the axial direction of the erection system tube, and has a forward / backward member that is a member that advances and retreats on one end side of the erection system tube, and a double torsion spring that urges the erection system tube toward the forward / backward member.

[0007] With this configuration, for example, by moving the advancing / retreating member toward the erection tube, the advancing / retreating member can push one end of the erection tube, tilting the axial direction of the erection tube. In this case, even when the advancing / retreating member retracts, the double torsion spring can bias the erection tube toward the advancing / retreating member, thereby changing the axial direction of the erection tube in accordance with the movement of the advancing / retreating member. Therefore, with this configuration, adjustments, such as tilting the axial direction of the erection tube, can be appropriately performed. Regarding the adjustment mechanism in this configuration, adjusting the erection system can be considered, for example, as adjusting the optical sight by tilting the axial direction of the erection tube. In this case, using a double torsion spring as the spring biasing the erection tube allows the use of a spring with a higher restoring force than, for example, a leaf spring. This also allows, for example, a wider range of tilting of the erection tube, thereby enabling a larger adjustment range for the optical sight. Therefore, with this configuration, for example, adjustments to the optical sight can be made more appropriately.

[0008] In this configuration, the adjustment mechanism further includes, for example, a spring fixing portion that fixes one end and the other end of the double torsion spring. In this case, the spring fixing portion fixes, for example, one end and the other end of the double torsion spring to a cylindrical body separate from the erection system tube. With this configuration, for example, the double torsion spring can be appropriately fixed in a position where it can bias the erection system tube. As the cylindrical body separate from the erection system tube, for example, a cylindrical body disposed adjacent to the erection system tube can be suitably used. More specifically, as this other cylindrical body, for example, a lens holder that holds at least some of the lenses in the objective system can be suitably used. With this configuration, for example, the double torsion spring can be appropriately fixed while preventing an excessive increase in the number of parts constituting the optical sight. Furthermore, this other cylindrical body can be considered, for example, as a spring fixing cylindrical body used to fix the double torsion spring. As the spring fixing cylindrical body, for example, a cylindrical body other than a lens holder may be used.

[0009] Furthermore, when using the spring fixing portion as described above, the spring fixing portion has, for example, a spring end fixing plate at each of one end and the other end of the double torsion spring. In this case, the spring end fixing plate is, for example, a plate-shaped body fixed to the outer surface of the spring fixing cylindrical body. For example, the spring end fixing plate is fixed to the outer surface of the spring fixing cylindrical body, sandwiching the end of the double torsion spring between the spring end fixing plate and the outer surface of the spring fixing cylindrical body. In this case, the spring end fixing plate has, for example, a plate-shaped portion and a protruding portion. For example, the plate-shaped portion is a plate-shaped portion fixed along the outer surface of the spring fixing cylindrical body. The protruding portion is a portion protruding from the plate-shaped portion. Then, for example, the spring end fixing plate is fixed to the outer surface of the spring fixing cylindrical body with the protruding portion inserted into the coil portion, which is the portion of the double torsion spring around which the wire is wound. With this configuration, for example, the double torsion spring can be properly fixed to the spring fixing cylindrical body.

[0010] In this configuration, the spring fixing portion further includes, for example, a screw for fixing the plate-shaped portion of the spring end fixing plate to the outer surface of the spring fixing cylindrical body. The plate-shaped portion has, for example, a cylindrical body side surface that faces the spring fixing cylindrical body when fixed to the spring fixing cylindrical body, and an outer surface that is the surface behind the cylindrical body side surface. The plate-shaped portion has, for example, a screw hole that penetrates from the outer surface to the cylindrical body side surface as a hole through which a screw can be inserted. The screw is inserted into the screw hole from the outer surface side of the plate-shaped portion. This configuration allows, for example, the spring end fixing plate to be properly fixed to the spring fixing cylindrical body. This also allows, for example, the double torsion spring to be more properly fixed to the spring fixing cylindrical body. In this case, the direction of the force that the screw receives when the double torsion spring biases the erection system cylinder can be considered to be different from the screw insertion direction. More specifically, the direction of the force that the screw receives when biased can be considered to be, for example, perpendicular to the screw insertion direction. Therefore, in this case, even if force is applied to the screw when biased, the screw is unlikely to fall off. This also makes it possible to appropriately prevent the spring end fixing plate from falling off due to the force generated when biased.

[0011] In this configuration, a recess for accommodating the plate-shaped portion is formed on the outer surface of the spring fixing cylinder. In this case, when the double torsion spring biases the erection system cylinder, the end of the double torsion spring is pressed against, for example, the wall surface of the recess. With this configuration, for example, the position of the end of the double torsion spring can be appropriately fixed when biased. This also allows, for example, the double torsion spring to appropriately bias the erection system cylinder. Furthermore, with regard to the position at which the spring end fixing plate is fixed, the spring end fixing plate used to fix one end of the double torsion spring and the spring end fixing plate used to fix the other end of the double torsion spring are fixed, for example, at positions on the outer surface of the spring fixing cylinder that face each other across the center of a circle of a cross section perpendicular to the axial direction of the spring fixing cylinder. With this configuration, for example, the function of the double torsion spring can be more appropriately exhibited. In this case, by using a double torsion spring, for example, it is possible to appropriately increase the distance between the fulcrum and the point of action of the spring without blocking the optical path in the optical sight, and this also makes it possible to more appropriately increase the range in which the erection tube can be tilted.

[0012] In this configuration, the adjustment mechanism may suitably be, for example, a mechanism that adjusts the impact position by tilting the axial direction of the erection tube. In this case, the adjustment mechanism may further include, for example, an up-down adjustment operation unit that receives a user's operation to adjust the impact position in the up-down direction, and a left-right adjustment operation unit that receives a user's operation to adjust the impact position in the left-right direction. In this case, the adjustment mechanism may include, as advancing / retracting members, a vertical advancing / retracting shaft that is a shaft-shaped advancing / retracting member that moves up and down in response to a user's operation of the up-down adjustment operation unit, and a left-right advancing / retracting shaft that is a shaft-shaped advancing / retracting member that moves left and right in response to a user's operation of the left-right adjustment operation unit. The double torsion spring may, for example, bias the erection tube against both the vertical advancing / retracting shaft and the left-right advancing / retracting shaft. In this case, the double torsion spring biasing the erection system tube against the vertical advance / retract shaft can be considered to bias the erection system tube so that the inclination of the erection system tube changes in accordance with the movement of the vertical advance / retract shaft when the vertical advance / retract shaft is retracted. The double torsion spring biasing the erection system tube against the horizontal advance / retract shaft can be considered to bias the erection system tube toward the horizontal advance / retract shaft so that the inclination of the erection system tube changes in accordance with the movement of the horizontal advance / retract shaft when the horizontal advance / retract shaft is retracted. With this configuration, for example, when adjusting the impact position in both the vertical and horizontal directions, a single double torsion spring can appropriately bias the erection system tube. Furthermore, in this case, using a double torsion spring can, for example, bring the spring into contact with a wide area of ​​the erection system tube to bias the erection system tube. This also allows, for example, the erection system tube to be more appropriately biased in multiple directions. Furthermore, it is also conceivable to use a method for adjusting an optical sight having the same characteristics as those described above as a configuration of the present invention. In this case, too, for example, the same effects as those described above can be obtained. [Effects of the Invention]

[0013] According to the present invention, for example, adjustments to an optical sight can be made more appropriately. [Brief explanation of the drawings]

[0014] [Figure 1] 1A and 1B are diagrams illustrating an optical sight 10 according to one embodiment of the present invention. Fig. 1A is a cross-sectional view showing an example of the configuration of the main parts of the optical sight 10. Fig. 1B is an enlarged view of the vicinity of the part indicated by the dashed dotted line AA in Fig. 1A. [Figure 2] 2A and 2B are diagrams for explaining in more detail the adjustment mechanism 20. Fig. 2A shows an example of how the spring 206 biases the movable barrel 134. Fig. 2B is a simplified cross-sectional view taken along the dashed line AA in Fig. 1A. [Figure 3] 3(a) is an explanatory diagram of an example of a method for attaching the spring 206. Fig. 3(a) is an exploded perspective view showing an example of the configuration of the spring fixing portion 208 in this example, together with the lens holder 132 and the spring 206. Fig. 3(b) is an exploded perspective view showing the configuration shown in Fig. 3(a) from a different perspective than Fig. 3(a). [Figure 4] 4A and 4B are diagrams illustrating an example of a method for attaching the spring 206. Fig. 4A is a perspective view showing an example of the configuration of the lens holder 132. Fig. 4B is a perspective view showing the state in which the spring 206 is attached to the lens holder 132 from multiple viewpoints. [Figure 5] 5A and 5B are diagrams illustrating a modified example of the configuration and fixing method of the spring 206. Fig. 5A is an exploded perspective view showing an example of the configuration of the spring 206 in this modified example, together with the lens holder 132 and the spring fixing portion 208. Fig. 5B is a perspective view showing an example of the fixing method of the spring 206 in this modified example. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an optical sight 10 according to one embodiment of the present invention. FIG. 1(a) is a cross-sectional view showing an example of the configuration of a main part of the optical sight 10. FIG. 1(b) is an enlarged view of the vicinity of the portion indicated by the dashed-dotted line AA in FIG. 1(a). The optical sight 10 is an optical device that allows a user to visually identify a target (object) and is attached to a gun such as a hunting gun or a sporting gun. More specifically, in this example, the optical sight 10 is attached to a long-range shooting gun (e.g., a rifle) and magnifies a distant target to be shot, such as hunting prey or a target, so that the user can visually identify it. In this case, the optical sight 10 can also be considered, for example, as a sighting telescope with a telescopic function. The optical sight 10 can also be considered, for example, as a scope attached to a gun (e.g., a rifle scope). In this example, the optical sight 10 includes an objective system 12, an erection system 14, an eyepiece system 16, a housing 18, and an adjustment mechanism 20. Except as described below, the optical sight 10 may have the same or similar features as known optical sights 10. For example, except as described below, the configuration of each part of the optical sight 10 can suitably be a configuration having the same function as a known configuration.

[0016] The objective system 12, the erecting system 14, and the eyepiece system 16 are components corresponding to the optical system of the optical sight 10. The objective system 12, which is on the objective lens side, faces the front of the gun, and the eyepiece system 16, which is on the eyepiece side, faces the rear of the gun, allowing the user, the shooter, to visually recognize the target to be shot. More specifically, of these components, the objective system 12 is a component corresponding to the objective optical system (objective system) and is disposed closer to the target (object side) than the erecting system 14 with respect to the target, which is the object of aim, and forms an inverted image of the target on a first focal plane (first focal plane). The first focal plane can be considered, for example, to be a focal plane set at a predetermined first position in the optical axis direction of the optical sight 10. In this example, the objective system 12 has multiple lenses 102, 104, 106 and a lens holder 132. In this case, the multiple lenses 102, 104, and 106 in the objective system 12 can be considered to be, for example, objective lenses in the optical sight 10. The lens holder 132 is a cylindrical body (cylindrical member) that holds at least some of the lenses in the objective system 12. The lens holder 132 can also be considered to be, for example, a cylindrical body that is installed in the housing 18 with its axial direction parallel to the optical axis direction of the optical sight 10. In this example, the lens holder 132 is an example of a cylindrical body separate from the movable barrel 134 in the erection system 14, and is disposed adjacent to the erection system 14 to hold the lens 106, of the multiple lenses in the objective system 12, that is disposed closest to the erection system 14. In this case, the other lenses in the objective system 12 are held by, for example, the housing 18. The objective system 12 may further include lens holders for other lenses.

[0017] The erection system 14 corresponds to an erection optical system (erecting system) and is disposed between the objective system 12 and the eyepiece system 16. The erection system 14 forms an erect image, which is an inverted image formed on a first focal plane, on a second focal plane. The second focal plane can be considered, for example, as a focal plane set at a predetermined second position in the optical axis direction of the optical sight 10. In this example, the erection system 14 includes multiple lenses 112, 114, and 116 and a movable barrel 134. The multiple lenses 112, 114, and 116 are disposed between the first focal plane and the second focal plane, and form an erect image, which is an inverted image formed on the first focal plane, on the second focal plane. The movable barrel 134 is a cylindrical body that holds the multiple lenses 112, 114, and 116. In this example, the movable barrel 134 is an example of an erection system barrel, and is disposed within the housing 18 so that its axial direction changes in response to user operation of the adjustment mechanism 20. More specifically, the movable barrel 134 changes its axial tilt by, for example, moving its end on the objective system 12 side in the vertical and horizontal directions, with a predetermined position on the eyepiece system 16 side as a fulcrum. In this case, the movable barrel 134 can be considered to be configured to tilt within the main body of the optical sight 10, with, for example, its end on the eyepiece system 16 side as a fulcrum. The vertical and horizontal directions can be considered to refer to, for example, the vertical and horizontal directions when the optical sight 10 is attached to a gun and in use. In FIG. 1(a), the vertical direction in the drawing corresponds to the vertical direction of the optical sight 10. The direction perpendicular to the plane of the drawing and the vertical direction corresponds to the horizontal direction of the optical sight 10. In this example, the erection system 14 changes the magnification of the optical sight 10, for example, by moving at least some of the multiple lenses 112, 114, and 116 in the axial direction of the movable barrel 134. In this case, the erection system 14 changes the magnification, for example, in accordance with a user's operation of an operation unit for adjusting the magnification in the optical sight 10. In this case, the multiple lenses in the erection system 14 can be considered, for example, as a group of lenses that invert an inverted image formed on the first focal plane into an erect image and adjust the magnification. In addition, the movable barrel 134 can be considered, for example, as a barrel containing these lens groups.The eyepiece system 16 is configured to correspond to an eyepiece optical system (eyepiece system), is disposed closer to the user (on the eyepiece side) than the erection system 14, and allows the user to view an erect image formed on the second focal plane. In this example, the eyepiece system 16 has multiple lenses 122, 124. The multiple lenses 122, 124 in the eyepiece system 16 can be considered to be, for example, eyepiece lenses in the optical sight 10.

[0018] The housing 18 accommodates the objective system 12, the erection system 14, the eyepiece system 16, and the like. In this example, the housing 18 is fixedly attached to a predetermined position on the gun, for example, using a mount (not shown). The adjustment mechanism 20 is a mechanism that adjusts the function of the optical sight 10 in response to a user's operation. Adjusting the function of the optical sight 10 can be considered, for example, to adjust the optical characteristics or aim of the optical sight 10. More specifically, in this example, the adjustment mechanism 20 shown in the figure is a mechanism that adjusts the impact position, and adjusts the optical sight 10 by tilting the axial direction of the movable barrel 134 in the erection system 14 in response to a user's operation. In this case, the adjustment mechanism 20 can also be considered, for example, to adjust the erection system 14. The adjustment of the impact position can be considered, for example, as an adjustment of the relationship between the impact point (impact position) of a bullet and the optical axis direction of the optical sight 10, using a gun to which the optical sight 10 is attached. The adjustment of the impact position can also be considered, for example, as an adjustment to align the gun's aim point with the impact point. In this example, the adjustment mechanism 20 adjusts the impact point by tilting the axial direction of the movable barrel 134, for example, by changing the center of the image perceived by the user. For convenience of illustration, FIG. 1 mainly illustrates the configuration of the adjustment mechanism 20 for adjusting the impact position in the vertical direction. In addition to the illustrated configuration, the adjustment mechanism 20 also includes a configuration for adjusting the impact position in the horizontal direction. More specifically, in this example, the adjustment mechanism 20 includes an operating unit 202, a retractable shaft 204, a spring 206, and the like, as shown in FIG. 1(b). 1, the adjustment mechanism 20 further includes a spring fixing unit that fixes a spring 206 to the lens holder 132 in the objective system unit 12. Of these components, the operation unit 202 receives user operation. In this example, the operation unit 202 is a dial that rotates in response to user operation. The advance / retract shaft 204 is a member (advance / retract member) that advances and retracts in response to user operation of the operation unit 202 at one end side of the movable barrel 134 in the erection system unit 14.In this example, the advancing / retracting shaft 204 advances and retreats at the end of the movable barrel 134 on the side of the objective system 12 in response to the rotation of the operation unit 202. This also causes the advancing / retracting shaft 204 to change the position of the end of the movable barrel 134.

[0019] 1, the operation unit 202 and the advance / retract shaft 204 shown in the figure are the operation unit 202 and the advance / retract shaft 204 for adjusting the impact position in the vertical direction. In this example, the adjustment mechanism 20 further includes an operation unit 202 and an advance / retract shaft 204 for adjusting the impact position in the horizontal direction in addition to the operation unit 202 and the advance / retract shaft 204 shown in the figure. In this case, the adjustment mechanism 20 can be considered to have, for example, multiple operation units 202 and advance / retract shafts 204. In this case, the operation unit 202 for adjusting the vertical direction can be considered, for example, an elevation dial for adjusting the impact position up or down. The operation unit 202 for adjusting the horizontal direction can be considered, for example, a windage dial for adjusting the impact position left or right. In this example, the operation unit 202 for adjusting the vertical direction is an example of an up / down adjustment operation unit that accepts an operation from the user to adjust the impact position in the vertical direction. The vertical adjustment shaft 204 is an example of a vertical adjustment shaft, which is a shaft-shaped member that moves up and down in response to a user's operation on the vertical adjustment control unit. The horizontal adjustment control unit 202 is an example of a horizontal adjustment control unit that accepts a user's operation to adjust the impact position in the horizontal direction. The horizontal adjustment shaft 204 is an example of a horizontal adjustment shaft, which is a shaft-shaped member that moves up and down in response to a user's operation on the horizontal adjustment control unit.

[0020] Furthermore, in the adjustment mechanism 20, the spring 206 biases the movable barrel 134 toward the advancing / retracting shaft 204. This also causes the spring 206 to press the movable barrel 134 against the advancing / retracting shaft 204. With this configuration, for example, by moving the advancing / retracting shaft 204 toward the movable barrel 134, the advancing / retracting shaft 204 presses one end of the movable barrel 134, thereby appropriately tilting the axial direction of the movable barrel 134. Furthermore, in this case, when the advancing / retracting shaft 204 retracts, the spring 206 biases the movable barrel 134 toward the advancing / retracting shaft 204, so that, for example, the axial direction of the movable barrel 134 can be changed in accordance with the movement of the advancing / retracting shaft 204. Therefore, with this configuration, for example, it is possible to appropriately adjust the tilt of the axial direction of the movable barrel 134. Furthermore, in this example, a double torsion spring is used as the spring 206. In this case, spring 206 can be suitably a spring identical or similar to a known double torsion spring. A double torsion spring can be considered, for example, to be a spring configured by connecting multiple torsion coil springs in series. A double torsion spring can also be considered, for example, to be a spring having multiple coil portions, which are the portions around which the wire of the coil spring is wound. A double torsion spring can also be considered, for example, to be a spring having multiple coil portions and being bent at the portions between the coil portions. In this example, spring 206 is a spring having two coil portions and being bent between these coil portions. When a double torsion spring of this configuration is used, for example, a torsional moment acts simultaneously on the two coil portions, and the torque generated at the same torsion angle can be considered to be twice that of a single torsion coil spring. A double torsion spring is also sometimes called, for example, a double kick spring.

[0021] Furthermore, in this example, the spring 206 is commonly used for adjusting the impact position in both the vertical and horizontal directions. In this case, the spring 206 can be considered to bias the movable barrel 134 against both the advance / retract shaft 204 for vertical adjustment and the advance / retract shaft 204 for horizontal adjustment. The spring 206 biasing the movable barrel 134 against the advance / retract shaft 204 for vertical adjustment can be considered to bias the movable barrel 134 so that the inclination of the movable barrel 134 changes in accordance with the movement of the advance / retract shaft 204 when the advance / retract shaft 204 is retracted. The spring 206 biasing the movable barrel 134 against the advance / retract shaft 204 for horizontal adjustment can be considered to bias the movable barrel 134 so that the inclination of the movable barrel 134 changes in accordance with the movement of the advance / retract shaft 204 when the advance / retract shaft 204 is retracted. With this configuration, for example, when adjusting the impact position in both the vertical and horizontal directions, the movable barrel 134 can be appropriately biased by a single spring 206. In this case, a double torsion spring can be used as the spring 206, allowing a spring with high restoring force to be appropriately used. In this case, for example, the spring 206 can be brought into contact with a wide area of ​​the movable barrel 134 to bias the movable barrel 134. Therefore, according to this example, for example, the movable barrel 134 can be more appropriately biased in multiple directions.

[0022] Next, the function of the spring 206 in the adjustment mechanism 20 will be described in more detail. FIG. 2 is a diagram illustrating the adjustment mechanism 20 in more detail. FIG. 2(a) shows an example of how the spring 206 biases the movable barrel 134. FIG. 2(b) is a simplified cross-sectional view taken along the dashed line AA in FIG. 1(a). As described above, in this example, the inclination of the movable barrel 134 changes in response to the advancement and retreat of the retractable shaft 204 in the adjustment mechanism 20. When the retractable shaft 204 retracts, the spring 206 biases the movable barrel 134 toward the retractable shaft 204, thereby changing the axial direction of the movable barrel 134 in accordance with the movement of the retractable shaft 204, for example. In this case, the spring 206 can also be considered to maintain the inclination of the movable barrel 134 in accordance with the position of the retractable shaft 204 by biasing the movable barrel 134, for example.

[0023] In this example, the spring 206 is fixed to the lens holder 132 in the objective system 12 (see FIG. 1) by a spring fixing portion 208 so that the portion between the two coil portions contacts one end of the movable barrel 134, as shown in FIG. 2(a), for example. In this case, the lens holder 132 can be considered, for example, as a cylindrical body disposed adjacent to the movable barrel 134. For convenience of illustration, in FIGS. 1 and 2(a), the spring 206 is illustrated as if it presses (applies pressure) the movable barrel 134 from bottom to top in the vertical direction. However, as explained above, in this example, the spring 206 is commonly used for adjustment in both the vertical and horizontal directions. Therefore, in an actual configuration, the spring 206 presses the movable barrel 134 in an oblique direction so that the movable barrel 134 is urged toward the retractable shaft 204 in both the vertical and horizontal directions, as shown as the pressure directions in FIG. 2(b), for example. More specifically, Figure 2(b) shows an example of the direction in which the spring 206 presses the movable barrel 134, along with the relative positions of the movable barrel 134 and the retractable shaft 204 as viewed from the eyepiece side. In this case, the pressure can be considered to be applied from a 45-degree angle downward to the left and a 45-degree angle upward to the right in the figure. With this configuration, for example, the movable barrel 134 can be appropriately biased by the spring 206.

[0024] Here, when adjusting the impact position, the greater the amount (range) that the movable barrel 134 can be tilted, the wider the adjustment range, which is the range in which the impact point can be adjusted. In this case, a wider adjustment range allows the optical sight 10 to aim at a wider range. Therefore, it is usually preferable to make the adjustment range of the impact point larger. On the other hand, in order to increase the adjustment range of the impact point, it is necessary to tilt the movable barrel 134 significantly inside the housing of the optical sight 10 (within the internal space of the main body). In this case, the load on the spring 206 that maintains the tilt of the movable barrel 134 also increases.

[0025] In this regard, it is also possible to use, for example, a leaf spring, instead of a double torsion spring, as the spring for maintaining the tilt of the movable barrel 134. However, in this case, the restoring force (repulsion force, reaction force) of the spring is weakened, which may result in a malfunction in which the movable barrel 134 cannot be properly maintained. In contrast, when a double torsion spring is used as the spring 206 as in this example, the restoring force of the spring can be appropriately increased compared to when a leaf spring or the like is used. This also allows, for example, the movable barrel 134 to be more appropriately maintained. In this case, by using a spring 206 with a higher restoring force compared to a leaf spring or the like, it is possible, for example, to widen the range in which the movable barrel 134 can be tilted. This also allows, for example, a wider adjustment range for adjustments to the optical sight 10. Therefore, according to this example, for example, adjustments to the optical sight 10 can be more appropriately performed. In this case, it is preferable to attach the spring 206 to the optical sight 10 in a way that, for example, the performance of the double torsion spring can be more appropriately exhibited. More specifically, as described above, in this example, the spring 206 is fixed to the lens holder 132 in the objective system unit 12 by using the spring fixing unit 208. In this case, the spring 206 is fixed to the lens holder 132, for example, as shown in FIGS.

[0026] 3 and 4 are diagrams illustrating an example of how to attach the spring 206. FIG. 3(a) is an exploded perspective view showing an example of the configuration of the spring fixing portion 208 in this example, together with the lens holder 132 and the spring 206. FIG. 3(b) is an exploded perspective view showing the configuration shown in FIG. 3(a) from a different perspective than FIG. 3(a). FIG. 4(a) is a perspective view showing an example of the configuration of the lens holder 132. FIG. 4(b) is a perspective view showing the state in which the spring 206 is attached to the lens holder 132 from multiple perspectives.

[0027] In this example, the spring fixing portion 208 has a plurality of fulcrum plates 302 and a plurality of screws 304. In this case, the spring fixing portion 208 has a fulcrum plate 302 at each of one end and the other end of the spring 206. The spring fixing portion 208 also has screws 304 corresponding to each fulcrum plate 302. The fulcrum plate 302 is a plate-like body that is an example of a spring end fixing plate, and is fixed to the outer surface of the lens holder 132. The outer surface of the lens holder 132 can be considered, for example, as a surface corresponding to the side surface of a cylindrical body. The lens holder 132 is also an example of a spring fixing cylindrical body. More specifically, at each of one end side and the other end side of the spring 206, the fulcrum plate 302 is fixed to the outer surface of the lens holder 132, with the end of the spring 206 sandwiched between the fulcrum plate 302 and the outer surface of the lens holder 132. In this example, the fulcrum plate 302 has a plate-like portion 312 and a protruding portion 314. The plate-like portion 312 is a plate-like portion that is fixed along the outer surface of the lens holder 132. In this case, the plate-like portion 312 can be considered to have, for example, a cylindrical body side surface that faces the lens holder 132 when fixed to the lens holder 132, and an outer side surface that is the back surface of the cylindrical body side surface. In this example, the plate-like portion 312 has a screw hole that penetrates from the outer side surface to the cylindrical body side surface. The screw hole can be considered, for example, to be a hole for passing the screw 304. The protruding portion 314 is a portion that protrudes from the plate-like portion 312. In this example, the protruding portion 314 protrudes from the plate-like portion 312 in a direction toward the inside of the lens holder 132. In this case, the fulcrum plate 302 is fixed to the outer surface of the lens holder 132 with the protrusion 314 inserted into the coil portion 222 of the spring 206, as shown in FIG. 4(b), for example. With this configuration, for example, the fulcrum plate 302 can appropriately fix the coil portion 222, which serves as the fulcrum (rotation fulcrum) of the spring 206. In this case, the protrusion 314 can also be thought of as functioning as, for example, a guide rod for the spring 206. The multiple screws 304 are fixing members that fix the multiple fulcrum plates 302 to the outer surface of the lens holder 132. In this example, the screws 304 are inserted into screw holes in the plate-shaped portion 312 of the fulcrum plate 302 from the outer surface side of the plate-shaped portion 312.With this configuration, for example, the fulcrum plate 302 can be appropriately fixed to the lens holder 132. This also makes it possible to appropriately fix the spring 206 to the lens holder 132, for example.

[0028] Furthermore, more specifically, in this example, with regard to the method of fixing the spring 206 to the lens holder 132, a recess 402 and a hole 404 are formed on the outer surface of the lens holder 132, for example, as shown in FIG. 4( a). In this case, when the fulcrum plate 302 is fixed to the lens holder 132, the recess 402 accommodates the plate-shaped portion 312 of the fulcrum plate 302. With this configuration, for example, the fulcrum plate 302 can be properly fixed to the lens holder 132 without the fulcrum plate 302 protruding from the outer surface of the lens holder 132. Furthermore, by forming the recess 402 on the outer surface of the lens holder 132, for example, the fulcrum plate 302 can be easily and properly attached to the correct position. Furthermore, the hole 404 is a hole into which a screw 304 is inserted when the fulcrum plate 302 is fixed. In this example, the holes 404 are formed on the bottom surface of the recess 402 at positions corresponding to the screw holes in the plate-shaped portion 312 of the fulcrum plate 302. With this configuration, the fulcrum plate 302 can be appropriately fixed to, for example, the lens holder 132. The holes 404 may be holes having female threads corresponding to the screws 304, for example.

[0029] 4(a), in this example, a groove 412 is further formed on the bottom surface of the recess 402. In this case, the configuration of the recess 402 can also be considered as, for example, a first recess corresponding to the recess 402 itself, with a second recess corresponding to the groove 412 formed within it. In this case, the groove 412 is a recess for accommodating the end of the spring 206. In this case, when the spring 206 is fixed by the spring fixing portion 208, the end of the spring 206 is inserted into the groove 412. Then, with the end of the spring 206 inserted into the groove 412, the fulcrum plate 302 is attached to the recess 402 so that the plate-shaped portion 312 covers the groove 412. With this configuration, for example, the fulcrum plate 302 can more reliably fix the end of the spring 206 to the lens holder 132. Furthermore, in this example, the groove 412 is formed at one end of the recess 402 so that one wall surface of the groove 412 is connected to the wall surface of the recess 402. More specifically, in this case, for example, the wall surface of the recess 402 and the wall surface of the groove 412 are connected to the wall surface on the side against which the end of the spring 206 is pressed when the spring 206 biases the movable cylinder 134 (see FIG. 1 ). Also, in this case, for example, it can be considered that the wall surface of the recess 402 includes one wall surface of the groove 412. And in this case, when the spring 206 biases the movable cylinder 134, for example, the end of the spring 206 is pressed against the wall surface of the recess 402. Therefore, with this configuration, for example, when the spring 206 biases the movable cylinder 134, the wall surface of the recess 402 can be appropriately fixed to a predetermined position. This also allows the spring 206 to more appropriately bias the movable cylinder 134, for example.

[0030] Furthermore, with regard to the positions at which the multiple fulcrum plates 302 are fixed, in this example, the fulcrum plates 302 are fixed at one end and the other end of the diameter of the cross-sectional circle of the lens holder 132, as shown in the figure, for example. In this case, the cross-sectional circle of the lens holder 132 can be considered, for example, as a circle of a cross section perpendicular to the axial direction of the lens holder 132. This cross-sectional circle can also be considered, for example, as a circle that approximates the cross-sectional shape of the lens holder 132. This circle can also be considered, for example, as a circle whose center is the position of the optical axis of the lens held by the lens holder 132 in a cross section perpendicular to the optical axis. In this case, fixing the fulcrum plates 302 at one end and the other end of the diameter of the circle can be considered, for example, as fixing the fulcrum plates 302 so that a straight line passing through the center of this circle on the cross section intersects with the fulcrum plates 302. In this case, the fulcrum plate 302 used to fix one end of the spring 206 and the fulcrum plate 302 used to fix the other end of the spring 206 can be considered to be fixed, for example, on the outer surface of the lens holder 132 at positions facing each other across the center of the cross-sectional circle. This configuration allows the spring 206 to function more appropriately. Furthermore, by using a double torsion spring as the spring 206, the distance between the fulcrum and the point of action of the spring 206 can be appropriately increased without blocking the optical path in the optical sight 10 (see FIG. 1 ). This also allows the range in which the movable barrel 134 can be tilted to be more appropriately increased. Therefore, according to this example, the spring 206 can be more appropriately fixed to the lens holder 132, for example. Also, in this case, it can be considered that a spring with a high restoring force can be more appropriately used by using a double torsion spring as spring 206 and fixing fulcrum plates 302 to one end and the other end of the diameter of the cross-sectional circle of lens holder 132. Furthermore, in this case, for example, fixing one end and the other end of spring 206 at multiple locations that are spaced apart can appropriately prevent distortion of lens holder 132.

[0031] As can be seen from the configuration of the spring 206 shown in FIG. 3( a), in this example, the spring 206 contacts the movable barrel 134 at the contact portion 224, which is the portion between the two coil portions 222. In this case, by fixing the fulcrum plate 302 to one end and the other end of the diameter of the cross-sectional circle of the lens holder 132, it is possible to ensure, for example, an appropriate and sufficient range for the contact portion 224. This also allows a single spring 206 to be more appropriately used for adjustments in both the up-down and left-right directions, for example. Furthermore, as described above, in this example, the end of the spring 206 is fixed to the position of the wall surface of the recess 402 of the lens holder 132. The wall surface of this recess 402 is the wall surface against which the end of the spring 206 is pressed when biased by the spring 206. In this case, it can also be considered that, when biased, the end of the spring 206 and the contact portion 224 are located on opposite sides of the diameter of the cross section where the multiple fulcrum plates 302 are located at both ends. In this case, the end of the spring 206 and the contact portion 224 are located on opposite sides of the diameter can be considered to be, for example, a correspondence relationship between a circle divided into two semicircles by the diameter, such that the position of the end of the spring 206 corresponds to one semicircle, and the position corresponding to the contact portion 224 corresponds to the other semicircle. The diameter of the cross section where the multiple fulcrum plates 302 are located at both ends can be considered, for example, as a diameter or a diameter whose extension passes through a predetermined reference position on the fulcrum plate 302. The reference position of the fulcrum plate 302 can be considered, for example, as a predetermined position on the fulcrum plate 302 that is common to the two fulcrum plates 302. The fact that the end of spring 206 and contact portion 224 are on opposite sides of the diameter when biased can be considered, for example, to mean that the end of spring 206 and contact portion 224 are on opposite sides of a plane that includes this diameter and is parallel to the optical axis of optical sight 10 when biased. Furthermore, depending on the restoring force required of spring 206 and the configuration of optical sight 10, the position at which the end of spring 206 is fixed can be, for example, on the same side as contact portion 224 when biased, or on the above-mentioned diameter. In this case, too, by using a double torsion spring as spring 206, it is possible to appropriately increase the distance between the fulcrum and point of action of spring 206, for example.

[0032] Regarding the spring that biases the movable barrel 134, for example, if the purpose is simply to bias the movable barrel 134, it is possible to use a leaf spring instead of a double torsion spring. However, when using a leaf spring, the position at which the spring is fixed to a cylindrical body such as the lens holder 132 is usually outside the position at which the leaf spring contacts the movable barrel 134 in the direction of the force with which the leaf spring biases the movable barrel 134. In this case, the force acting on the spring (leaf spring) during biasing can easily cause the spring to fall off. In contrast, in the configuration of this example, the direction of the force acting on the screw 304 used to fix the fulcrum plate 302 of the spring fixing portion 208 can be considered to be, for example, a direction different from the insertion direction of the screw 304. More specifically, the direction of the force acting on the screw 304 during biasing can be considered to be, for example, perpendicular to the insertion direction of the screw 304. In this case, even if a force is applied to the screw 304 during biasing, the screw 304 is unlikely to fall off. Therefore, according to this example, for example, it is possible to appropriately prevent the fulcrum plate 302 from falling off due to the force generated during biasing. Furthermore, when using a leaf spring or the like, it may seem that a sufficiently long screw or the like can be used to secure the leaf spring or the like to prevent the spring from falling off. However, when securing a spring to a cylindrical body related to the optical path of the optical sight 10, such as the lens holder 132, using a long screw or the like may cause the tip of the screw to penetrate into the cylindrical body, thereby affecting the optical path. In contrast, according to this example, even when a short screw 304 is used, the spring 206 can be appropriately secured to the lens holder 132 or the like.

[0033] Furthermore, the specific configuration of the optical sight 10 is not limited to the configuration described above and can be modified in various ways. In this case, for example, the specific configuration of the spring 206, the method of fixing the spring 206, and the like may be different from the configuration described above, as shown in FIG. 5. FIG. 5 is a diagram illustrating a modified configuration of the spring 206 and the method of fixing the spring 206. FIG. 5(a) is an exploded perspective view showing an example of the configuration of the spring 206 in this modified example, together with the lens holder 132 and the spring fixing portion 208. FIG. 5(b) is a perspective view showing an example of the method of fixing the spring 206 in this modified example. Except as described below, components in FIG. 5 denoted by the same reference numerals as those in FIGS. 1 to 4 may have the same or similar features as the components in FIGS. 1 to 4. Furthermore, in further modified examples of the configuration or the method of fixing the spring 206, only some of the features described below may be different from the configuration described using FIGS. 1 to 4.

[0034] In this modification, as shown in FIG. 5( a), the spring 206 has a bent portion 232 between the coil portion 222 and the contact portion 224. The bent portion 232 is a portion of the spring 206 that bends in a predetermined direction, and as shown in FIG. 5( b), for example, the bent portion 232 bends in a direction from the spring 206 toward the movable barrel 134 when biasing the movable barrel 134 (see FIG. 1). By using a spring 206 having such a bent portion 232, for example, the restoring force of the spring 206 can be more appropriately increased. Furthermore, for example, when the retractable shaft 204 (see FIG. 1) in the adjustment mechanism 20 is retracted, the spring 206 can more appropriately bias the movable barrel 134 even when the retractable shaft 204 is further retracted. Therefore, with this configuration, for example, the range of tilt (movable range) of the movable barrel 134 can be more appropriately increased during adjustment. Furthermore, in the spring 206 of this modified example, the contact portion 224 is curved to match the shape of the movable barrel 134, as shown in FIG. 5(a), for example. In this case, the contact portion 224 can be considered to be curved, for example, to a shape close to the outer diameter of the movable barrel 134. With this configuration, for example, the area (ground contact area) where the spring 206 contacts the movable barrel 134 can be more appropriately enlarged. This also makes it possible to more appropriately apply force (pressure) from the spring 206 to the movable barrel 134, for example, when adjusting in the up-down and left-right directions.

[0035] Furthermore, in this modification, as shown in FIG. 5(b), the method of fixing the spring 206 to the lens holder 132 is different from that described above using FIG. 4 and the like. More specifically, in this modification, a recess 402 for accommodating the fulcrum plate 302 of the spring fixing portion 208 and a hole 404 for the screw 304 are formed on the outer surface of the lens holder 132. However, in this modification, the groove 412 (see FIG. 4) on the bottom surface of the recess 402 is not formed. With this configuration, for example, the lens holder 132 can be machined more easily and appropriately. This also makes it possible, for example, to reduce the cost required for machining the lens holder 132.

[0036] In this modification, the recess 402 of the lens holder 132 is formed to be wider than the fulcrum plate 302, as shown in FIG. 5(b), for example. As a result, the recess 402 accommodates the fulcrum plate 302 such that a gap 414 is formed between the fulcrum plate 302 and at least one wall surface of the recess 402 in the circumferential direction of the lens holder 132. In this case, the spring 206 is fixed to the lens holder 132 by the spring fixing portion 208 with the coil portion 222 inserted into the protruding portion of the fulcrum plate 302 and the end portion accommodated in the gap 414. In this case, as can be understood from the illustrated configuration, the gap 414 that accommodates the end portion of the spring 206 is located at the wall surface of the recess 402 on the side against which the end of the spring 206 is pressed when the spring 206 biases the movable barrel 134. Therefore, in this modification as well, for example, when biased by the spring 206, the wall surface of the recess 402 can appropriately fix the position of the end of the spring 206 at a predetermined position. This also allows, for example, the spring 206 to more appropriately bias the movable barrel 134. Also in this case, the wall surface of the recess 402 can be considered, for example, to be part of the outer surface of the lens holder 132. Therefore, in this case as well, the fulcrum plate 302 can be considered, for example, to be fixed to the outer surface of the lens holder 132 with the end of the spring 206 sandwiched between it and the outer surface of the lens holder 132.

[0037] Next, supplementary explanations regarding the configuration described above and further modifications will be provided. For ease of explanation, the following may refer to the present example, including the modifications described above or below. As described above, in the adjustment mechanism 20, for example, one end and the other end of the spring 206 are fixed to the lens holder 132, which is a cylindrical body separate from the movable barrel 134, using the spring fixing portion 208. With this configuration, for example, a double torsion spring used as the spring 206 can be appropriately fixed in a position where it can bias the movable barrel 134. Furthermore, in this case, fixing the spring 206 to the lens holder 132 can appropriately fix the spring 206 while preventing, for example, an excessive increase in the number of parts constituting the optical sight 10. On the other hand, in a modification of the configuration of the optical sight 10, one end and the other end of the spring 206 may be fixed to a cylindrical body other than the lens holder 132. In this case, this cylindrical body can be considered, for example, as an example of a spring fixing cylindrical body. In this case, the cylindrical body to which one end and the other end of the spring 206 are fixed may be, for example, a cylindrical body disposed closer to the objective side than the first focal plane of the optical sight 10. This configuration allows for more flexibility in determining the position to fix the spring 206, for example. This also allows for greater freedom in designing the optical sight 10, for example.

[0038] As explained above, a double torsion spring can be considered, for example, to be a spring with multiple coil portions. In this case, a modified version of the double torsion spring used as spring 206 that biases movable barrel 134 can be considered, for example, to be a double torsion spring formed by combining multiple torsion springs with one coil portion (single torsion springs). More specifically, in this case, a configuration in which, for example, two single torsion springs are connected directly or via a component can be considered to be a double torsion spring. Even in such a configuration, the same or similar effects as those described above can be appropriately obtained by using this double torsion spring in the same or similar manner as the configuration described above.

[0039] The features of this example described above can be considered to correspond to, for example, features of a double torsion spring mounting mechanism in an optical sight 10 such as a riflescope. These features can also be considered to correspond to, for example, features of a method for adjusting the optical sight 10. In this case, the method for adjusting the optical sight 10 can be considered to be, for example, a method for adjusting while biasing the movable barrel 134 with a double torsion spring. The above description of adjustments made to the optical sight 10 has primarily focused on adjusting the impact position. However, the optical sight 10 may also perform adjustments other than the impact position. In this case, the optical sight 10 may further include, for example, an adjustment mechanism for adjustments other than the impact position. As such adjustment mechanisms, the optical sight 10 may further include adjustment mechanisms for, for example, magnification adjustment, focus adjustment, illumination adjustment, etc. [Industrial Applicability]

[0040] The present invention can be suitably used in, for example, optical sights. [Explanation of symbols]

[0041] 10 optical sight, 102 lens, 104 lens, 106 lens, 112 lens, 114 lens, 116 lens, 12 objective lens, 122 lens, 124 lens, 132 lens holder, 134 movable barrel, 14 erection lens, 16 eyepiece lens, 18 housing, 2 0. Adjustment mechanism, 202. Operation section, 204. Advance / retreat shaft, 206. Spring, 208. Spring fixing section, 222. Coil section, 224. Contact section, 232. Bending section, 302. Fulcrum plate, 304. Screw, 312. Plate-shaped section, 314. Protrusion, 402. Recess, 404. Hole, 412. Groove, 414. Gap

Claims

1. An optical sight that is attached to a gun and used, an objective system that forms an inverted image of a target to be aimed at on a first focal plane; an erection system that forms an erect image obtained by inverting the inverted image on a second focal plane; an adjustment mechanism for adjusting the erection system; Equipped with The erection system part is a lens disposed between the first focal plane and the second focal plane; an erection tube which is a cylindrical body for holding the lens; and the adjustment mechanism is a mechanism for adjusting the tilt of the axial direction of the erection tube, a reciprocating member that is a member that reciprocates at one end side of the erection system tube; a double torsion spring that biases the erection system cylinder toward the advancing and retreating member; An optical sight comprising:

2. 2. The optical sight according to claim 1, wherein the adjustment mechanism further comprises a spring fixing portion that fixes one end and the other end of the double torsion spring to a cylindrical body separate from the erection system tube.

3. 3. The optical sight according to claim 2, wherein the other cylindrical body is a lens holder that holds at least some of the lenses in the objective system.

4. The spring fixing portion is provided at each of one end and the other end of the double torsion spring. a spring end fixing plate, which is a plate-like body fixed to the outer surface of the spring fixing cylinder, sandwiching an end of the double torsion spring between the plate-like body and the outer surface of the spring fixing cylinder, The spring end fixing plate is a plate-shaped portion that is a plate-shaped portion fixed along the outer surface of the spring fixing cylindrical body; a protruding portion protruding from the plate-shaped portion; and The optical sighting device according to claim 2, characterized in that the protrusion is inserted into the coil portion, which is the portion of the double torsion spring where wire is wound, and is fixed to the outer surface of the spring fixing cylindrical body.

5. the spring fixing portion further includes a screw for fixing the plate-like portion of the spring end fixing plate to an outer surface of the spring fixing cylindrical body, the plate-like portion has a cylindrical body side surface that faces the spring fixing cylindrical body when fixed to the spring fixing cylindrical body, and an outer side surface that is the surface on the back side of the cylindrical body side surface, and a screw hole that penetrates from the outer side surface to the cylindrical body side surface is formed as a hole for passing the screw, 5. The optical sight according to claim 4, wherein the screw is inserted into the screw hole from the side of the outer surface of the plate-like portion.

6. a recess for accommodating the plate-shaped portion is formed on the outer surface of the spring fixing cylindrical body, 5. The optical sight according to claim 4, wherein, when the double torsion spring biases the erection system tube, an end of the double torsion spring is pressed against a wall surface of the recess.

7. The optical sight described in claim 4, characterized in that the spring end fixing plate used to fix one end of the double torsion spring and the spring end fixing plate used to fix the other end of the double torsion spring are fixed at opposite positions on the outer surface of the spring fixing cylindrical body, sandwiching the center of a circle of a cross section perpendicular to the axial direction of the spring fixing cylindrical body.

8. the adjustment mechanism is a mechanism that adjusts the impact position by tilting the axial direction of the erection system cylinder, an up-down adjustment operation unit that receives an operation from a user to adjust the landing position in the up-down direction; a left-right adjustment operation unit that receives an operation from the user to adjust the landing position in the left-right direction; and The advancing and retreating member may be: a vertical movement shaft that is a shaft-shaped movement member that moves forward and backward in the vertical direction in response to an operation of the user on the vertical adjustment operation unit; a left-right advancement / retraction shaft that is a shaft-shaped advancement / retraction member that advances and retracts in the left-right direction in response to an operation by the user on the left-right adjustment operation unit; and 2. The optical sight according to claim 1, wherein the double torsion spring biases the erection system tube against both the vertical movement axis and the horizontal movement axis.

Images