Optical sight

An optical sight of the present invention may aim at an object via a cross. The optical sight has a focusing adjuster for focusing and a brightness adjuster for adjusting luminance on a cross. The focusing adjuster and the brightness adjuster are made at the same position that user may operate the optical sight more conveniently.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to an optical device, and more particularly to an optical sight.

2. Description of the Related Art

FIG. 1shows a conventional optical sight100including a barrel110, on which a focusing adjuster120and a brightness adjuster130are provided, to provide a clearly view of an object when the user aims the optical sight100at the object.

However, the focusing adjuster120and the brightness adjuster130are provided at different positions of the barrel110that the user has to shift his/her hand between the focusing adjuster120and the brightness adjuster130for several times to operate them repeatedly before the user may get a clear view of the object through the optical sight100. In aiming, the user looks at the optical sight100by one eye and keeps the other eye open to pay attention to other stuffs around. However, sometime, the optical sight100may block the view of the eye that the user could aware of the accident immediately when he/she is aiming through the optical sight100.

In conclusion, the conventional optical sight100still has some drawbacks to be improved.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an optical sight, which has the focusing adjuster and the brightness adjuster at the same position.

According to the objective of the present invention, the present invention provides an optical sight including a barrel; a lens assembly received in the barrel; a lens with a cross received in the barrel; a light emitting device received in the barrel to emit light to the lens to light the cross up; a focusing adjuster, which is provided at the barrel, including a focusing knob rotating along a center of rotation to move at least a lens of the lens assembly along an optical axis for focusing when the focusing knob is turned; a brightness adjuster, which is provided at the barrel, including a brightness knob rotating along the center of rotation to change a luminance of the light emitting device when the brightness knob is turned; and a power source electrically connected to light emitting device through the brightness adjuster.

The present invention further provides an optical sight including a barrel; a lens assembly received in the barrel; a lens with a cross received in the barrel; a light emitting device received in the barrel to emit light to the lens to light the cross up; a focusing adjuster, which is provided at the barrel, including a focusing knob rotating along a first center of rotation to move at least a lens of the lens assembly along an optical axis for focusing when the focusing knob is turned; a brightness adjuster, which is provided at the barrel, including a brightness knob rotating along a second center of rotation to change a luminance of the light emitting device when the brightness knob is turned; and a power source electrically connected to light emitting device through the brightness adjuster.

DETAILED DESCRIPTION OF THE INVENTION

As shown inFIG. 2toFIG. 4, an optical sight1of the preferred embodiment of the present invention includes a barrel10, a focusing adjuster20, a brightness adjuster30, and a power source40.

The barrel10has a body11, a first base12, and a second base13. The body11has an opening111thereon, and has a lens assembly, a frame51, a lens52with a cross at a center thereof, and a light emitting device53. The lens assembly includes a plurality of lenses54mounted on the frame51. The frame51is provided with an axle511inserted into the opening111. The light emitting device53is a LED in the present invention to light the cross of the lens52up.

The first base12is fixed to the body11by bolts60. The axle511of the frame51is inserted into the first base12through the opening111of the body11. The first base12further has a bore121on a sidewall thereof. The second base13is fixed to the first base12by bolts61. An O ring14is provided between the first base12and the second base13to protect the second base13.

The focusing adjuster20includes a focusing cam21, and a focusing knob22. The focusing cam21is received in the first base12. As shown inFIG. 5, the focusing cam21has a side211facing the body11and has a slot212on the side211to be engaged with the axle511of the frame51. The slot212is curved and has an end proximal to a center of the side211and the other end distal to the center thereof. The focusing knob22is provided on an outer side of the first base12to be turned along an axle. The focusing knob22has a shaft23passing through the bore121of the first base12to connect the focusing cam21that the frame51may be moved by turning the knob50through the shaft23moves along the slot212. The frame51carrying the lenses54is moved along an optical axis of the lenses54for focusing.

The brightness adjuster30includes a section elastic member31, a main circuit board31, a brightness knob33, and a brightness control circuit board34. The section elastic member31is provided on the main circuit board32. The main circuit board32has three pads321to be connected to the light emitting device53through a flexible printed circuit board35. The section elastic member31and the main circuit board32are fixed to the second base13by bolts62. The brightness knob33is provided on an outer side of the second base13. The brightness knob33and the focusing knob22are turned along the same shaft. The section elastic member31is engaged with an inner side of the brightness knob33that the section elastic member31may stop the brightness knob33at predetermined positions and sound clicks remind the user. The section elastic member31is a well known art, so we do not describe the detail here. The brightness control circuit board34is connected to the brightness knob33to be turned along with the brightness knob33. The brightness control circuit board34has several different resistors electrically connected to the pads321respectively.

The power source40is a battery. An electrode plate41, a ring42, and a lid43are mounted on the brightness adjuster30to receive the battery40therein and connect the battery40to the brightness control circuit board34to provide power to the light emitting device53.

User may turn the brightness knob33to turn the brightness control circuit board34. It may change the resistance between the power source40and the light emitting device53through the pads contacting with different resistors to adjust the luminance of the light emitting device53. It may provide several LEDs to emit different color lights to the lens52. User may choose a suitable color light according to the background of the object that user may see the object more clearly through the optical sight1of the present invention.

FIG. 6shows an optical sight2of the second preferred embodiment of the present invention, which is similar to the first preferred embodiment, except that a focusing adjuster70has a focusing knob71, which is turned along a first center of rotation, and a brightness adjuster80has a brightness knob81, which is turned along a second center of rotation. The focusing knob71and the brightness knob81are independent that user may turn focusing knob71and the brightness knob81respectively to adjust the focusing and brightness.

An alternate design of the focusing adjuster and the brightness adjuster is that the brightness adjuster is more proximal to the body than the focusing adjuster.

Except for the circuit of the present invention for the brightness adjuster30to adjust the luminance thereof, it may provide a variable resistor to change the resistance to provide a stepless control of the luminance of the LED.

The first base12and the second base13may be made into a single element, and furthermore, the body11, the first base12and the second base13may be made into a single element.

The description above is a few preferred embodiments of the present invention, and the equivalence of the present invention is still in the scope of claim construction of the present invention.