Compensating mechanism

A compensating mechanism includes a base, an adjusting unit, an adjusting cover and a stop unit. The adjusting unit is disposed in the base. The adjusting cover connects to the adjusting unit and includes a curved groove. The stop unit is disposed between the adjusting unit and the base and includes a pin. When the adjusting cover is rotated, the adjusting unit is only rotated with respect to the base and the stop unit is axially moved with respect to the base so that the pin enters or leaves the curved groove.

BACKGROUND OF THE INVENTION

Field of the Invention

The invention relates to a compensating mechanism, and more particularly to a compensating mechanism for a sight.

Description of the Related Art

Generally, a sight is provided with a compensating mechanism for correcting bullet impact points of a firearm. Before the bullet impact points are corrected, it is required to set a compensating mechanism to a zero-point state wherein an adjusting screw of the compensating mechanism is adjusted to a reference position and an adjusting cover of the compensating mechanism is adjusted to a zero-point position. After the zero-point state is set, the user is able to operate the compensating mechanism to correct the bullet impact points of the firearm. However, the adjusting cover may have been rotated many times after a correction of bullet impact points. If correcting bullet impact points for a new target at a different distance is desired afterwards, the user generally has no idea or way to return the compensating mechanism to the zero-point state.

BRIEF SUMMARY OF THE INVENTION

The invention provides a compensating mechanism which is able to perform a zero-point-stop function by use of a stop unit. The compensating mechanism in accordance with an exemplary embodiment of the invention includes a base, an adjusting unit, an adjusting cover and a stop unit. The adjusting unit is disposed in the base. The adjusting cover connects to the adjusting unit and includes a curved groove. The stop unit is disposed between the adjusting unit and the base and includes a pin. When the adjusting cover is rotated, the adjusting unit is only rotated with respect to the base and the stop unit is axially moved with respect to the base so that the pin enters or leaves the curved groove.

In another exemplary embodiment, the compensating mechanism includes a base, an adjusting unit and a stop unit. The adjusting unit is disposed in the base. The adjusting cover connects to the adjusting unit and includes a curved groove. The stop unit is disposed between the adjusting unit and the base and includes a pin. When the adjusting cover is rotated, an axial distance between the adjusting cover and the base is fixed and the stop unit is axially moved with respect to the base so that the pin enters or leaves the curved groove.

In yet another exemplary embodiment, the stop unit further includes a rotary ring disposed around the adjusting unit, the pin is disposed on the rotary ring, and the rotary ring and the pin are axially moved with respect to the base when the adjusting cover is rotated.

In another exemplary embodiment, the rotary ring is rotated with respect to the adjusting unit when the adjusting cover is rotated.

In yet another exemplary embodiment, when rotated, the pin is axially moved with respect to the rotary ring.

In another exemplary embodiment, the base includes a mount cover, the pin includes a flange portion, and the pin is protruded from the mount cover and penetrated into the curved groove when the flange portion is propped against the mount cover.

In yet another exemplary embodiment, the compensating mechanism further includes a fastening screw which is sequentially penetrated through the mount cover and the rotary ring and fixed to the base to prevent the rotary ring from rotating with respect to the base.

In another exemplary embodiment, the mount cover has a through hole, the pin further includes a nut portion and a threaded portion respectively connected to opposite sides of the flange portion, the threaded portion is threaded onto the rotary ring, and the nut portion is penetrated through the through hole of the mount cover.

In yet another exemplary embodiment, an outer diameter of the flange portion is greater than that of the nut portion and also greater than an inner diameter of the through hole.

In another exemplary embodiment, the adjusting cover further comprises a blocking portion, and the blocking portion and the curved groove are configured to form a complete circle.

In yet another exemplary embodiment, the compensating mechanism further includes an adjusting screw disposed in the adjusting unit and penetrated through the base, wherein the adjusting screw is axially moved with respect to the base when the adjusting cover is rotated.

DETAILED DESCRIPTION OF THE INVENTION

Referring toFIGS. 1 and 2, a compensating mechanism10of a sight in accordance with an embodiment of the invention includes an adjusting cover11, an adjusting unit12, a base13, a stop unit14and an adjusting screw15. In operation, a user is able to adjusting the compensating mechanism10by rotating the adjusting cover11in a predetermined direction to correct bullet impact points of a fire arm. Also, the user is able to rotate the adjusting cover11in a direction opposite to the predetermined direction until the adjusting cover11is stopped by the stop unit14, whereby the compensating mechanism is returned to a zero-point state.

The base13is fixed to a main body of the sight. As shown inFIG. 1, the base13includes a mount cover131, a first mount132and a second mount133. The second mount133is disposed on the main body of the sight. The first mount132is disposed on the second mount133. The mount cover131is disposed on an end of the first mount132, wherein the end is farther from the second mount133than another end of the first mount132. As shown inFIG. 2, the mount cover131has a first central hole311, the first mount132has a second central hole321, and the second mount133has a third central hole331. The adjusting unit12is penetrated through the first central hole311and the second central hole321to be mounted in the base13and is rotatable with respect to the base13. The adjusting unit12includes a sleeve cover121and a sleeve122, wherein the sleeve122is rotatably disposed in the first mount132and the second mount133. The sleeve cover121is disposed on an end of the sleeve122, wherein the end is farther from the second mount133than another end of the sleeve122.

The sleeve122has an adjusting hole221shown inFIG. 1. The adjusting screw15is disposed in the adjusting hole221, is penetrated through the third central hole331of the second mount133, and extended into the main body of the sight. The adjusting screw15has external threads (not shown) on its outer circumferential surface, the adjusting hole221has internal threads (not shown) on its inner circumferential surface, and the external threads and internal threads mate with each other so that a relative movement between the adjusting screw15and the sleeve122in an axial direction of the compensating mechanism10happens along with a relative rotation between the adjusting screw15and the sleeve122. Referring toFIG. 2, the cross section of the third central hole331of the second mount133corresponds to that of the adjusting screw15in shape so that the adjusting screw15cannot be rotated with respect to the base13when the base13is stationary. Therefore, the adjusting screw15will only axially move with respect to the base13if the sleeve122of the adjusting unit12is rotated with respect to the base13. Also, the sleeve122, limited by the base13in the axial direction of the compensating mechanism10, cannot be axially moved with respect to the base13when the adjusting unit12is rotated with respect to the base13. In another embodiment, the sleeve122of the adjusting unit12is configured to be simultaneously rotatable and movable with respect to the base13.

As shown inFIG. 1, the stop unit14is disposed between the adjusting unit12and the base13and includes a pin141and a rotary ring142. The rotary ring142is disposed around the sleeve122of the adjusting unit12while the pin141is mounted on the rotary ring142, penetrated through the mount cover131of the base13, and protruded from the mount cover131. The sleeve122has external threads (not shown) on its outer circumferential surface, the rotary ring142has internal threads (not shown) on its inner circumferential surface, and the external threads and internal threads mate with each other so that a relative movement between the rotary ring142and the sleeve122in an axial direction of the compensating mechanism10happens along with a relative rotation between the rotary ring142and the sleeve122. Referring toFIG. 2, two fastening screws313are penetrated through the mount cover131and the rotary ring142and fixed to the first mount132of the base13so that the rotary ring142cannot be rotated with respect to the base13. Therefore, the rotary ring142and the pin141mounted thereon will only axially move with respect to the base13if the sleeve122of the adjusting unit12is rotated with respect to the base13. It is worth noting that the pin141can be controlled to protrude or not protrude from the mount cover131by rotating the sleeve122.

In this embodiment, the pin141includes a nut portion411, a flange portion412and a threaded portion413. The rotary ring142has a threaded hole421as shown inFIG. 2. The nut portion411and the threaded portion413are respectively connected to the opposite sides of the flange portion412. The threaded portion413is mounted on the rotary ring142via the threaded hole421. The threaded portion413has external threads (not shown) on its outer circumferential surface, the threaded hole421has internal threads (not shown) on its inner circumferential surface, and the external threads and internal threads mate with each other so that a relative movement between the rotary ring142and the pin141in an axial direction of the compensating mechanism10happens along with a relative rotation between the rotary ring142and the pin141. In this embodiment, the mount cover131has a through hole312for receiving the nut portion411as shown inFIG. 2. An outer diameter of the flange portion412is greater than that of the nut portion411and also greater than an inner diameter of the through hole312. When the pin141is axially moved toward the mount cover131, the nut portion411can pass through the through hole312but the flange portion412is blocked by the bottom of the mount cover131where the flange portion412is propped against the mount cover131. When the flange portion412is propped against the mount cover131, the nut portion411is protruded from the mount cover131.

Referring toFIG. 1, the adjusting cover11is fixed to the sleeve cover121of the adjusting unit12by a plurality of screws111, so that the adjusting cover11in rotation can drive the adjusting unit12to rotate with respect to the base13. Referring toFIG. 3, the adjusting cover11has a surface facing the base13, on which a curved groove112and a blocking portion113are formed and arranged to form a complete circle. When the flange portion412is propped against the bottom of the mount cover131, the pin141is protruded from the mount cover131and enters the curved groove112. By such arrangement, the pin141may contact the blocking portion113to limit the rotation of the adjusting cover11.

Before the bullet impact points are corrected, it is required to set the compensating mechanism10to a zero-point state wherein the adjusting screw15of the compensating mechanism10is adjusted to be located in a reference position and the pin141of the stop unit14is adjusted to be located in the curved groove112of the adjusting cover11and to be propped against the blocking portion113. In detail, the user removes the adjusting cover11and manually rotates the adjusting unit12until the adjusting screw15is axially moved to the reference position. Due to the rotation of the adjusting unit12, the pin141and the rotary ring142are axially moved with respect to the base13. However, the pin141may have not entered the curved groove112. If so, the user can rotate the pin141so that the pin141is moved with respect to the rotary ring142in the axial direction of the mount cover131until the flange portion412is propped against the bottom of the mount cover131. During rotation of the pin141, the pin141cannot drop or separate from the mount cover131because the outer diameter of the flange portion412is greater than that of the nut portion411and also greater than the inner diameter of the through hole312. After adjusting the blocking portion113of the adjusting cover11to contact the pin141, the user fixes the adjusting cover11to the adjusting unit12to complete the zero-point-state setting. It is noted that the adjusting cover11is in a zero-point position when the pin141is adjusted to be located in the curved groove112and propped against the blocking portion113.

After the zero-point state is set, the user can operate the compensating mechanism10to correct the bullet impact points of a firearm. At the beginning, the adjusting cover11under the limitation of the stop unit14can only be rotated in a predetermined direction (e.g. counterclockwise). Once the adjusting cover11is rotated in the predetermined direction, the pin141separates from the blocking portion113to release the adjusting cover11from the stop unit14. Therefore, the rotation of the adjusting cover11is no longer limited to the predetermined direction. During the operation of correcting bullet impact points, the adjusting cover11is rotated for driving the adjusting unit12to rotate with respect to the base13and for driving the adjusting screw15to axially move with respect to the base13until the adjusting screw15is moved to a predetermined position. Also, during the rotation of the adjusting unit12, the pin141and the rotary ring142are axially moved with respect to the base13and away from the mount cover131so that the pin141leaves the curved groove112.

During the process of correcting the bullet impact points, the user is able to return the compensating mechanism10to the zero-point state at any time. In detail, the user can rotate the adjusting cover11in a direction opposite to the predetermined direction (e.g. clockwise) to rotate the adjusting unit12so that the adjusting screw15is axially moved to leave the predetermined position. During the process of rotation of the adjusting unit12, the pin141and the rotary ring142are axially moved with respect to the base13and toward the mount cover131until the flange portion412is propped against the bottom of the mount cover131. Then, the pin141enters the curved groove112, the blocking portion113of the adjusting cover11is propped against the pin141, and the adjusting cover11is limited by the stop unit14to stop in the zero-point position where the adjusting cover11cannot be further rotated in the direction opposite to the predetermined direction. At that time, the adjusting screw15is returned to the reference position, and the compensating mechanism is returned to the zero-point state.

Due to use of the stop unit14, the user only needs to reversely rotate the adjusting cover11and the compensating mechanism10can rapidly return to the zero-point state. Therefore, operation of the compensating mechanism10becomes easier and intuitional.