Abstract:
A sighting device includes a body, a light emitting unit, a bracket, a first adjusting unit and a second adjusting unit. The body couples to an arm having a barrel. The body is disposed relative to the arm in a first direction defined on an up and down axis. A third direction is defined as a direction of the barrel on a front and back axis. A second direction is defined as a left and right axis. The bracket couples to the light emitting unit. The first adjusting unit couples the bracket to the body and moves the bracket relative to the body. The second adjusting unit couples the bracket to the body and moves the bracket relative to the body.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Korean Patent Application No. 10-2015-0052970, filed Apr. 15, 2015, the entirety of which is incorporated by reference in its entirety. 
     BACKGROUND 
     The present disclosure relates to a dot sighting device, and more particularly, a dot sighting device capable of enabling a user to zero rapidly. 
     In the past, a dot sighting device configured such that an optical sighting device employs a no-power lens or a low-power lens and uses an aiming point with no complicated line of sight has been developed. 
     The dot sighting device with the no- or low-power lens helps the user rapidly aim at a target and is useful at a short distance or in an urgent situation. 
     Specifically, a time necessary to align a line of sight can be reduced, and since the user has only to match a dot reticle image with a real target, the user can be given a time enough to secure a field of vision. Thus, a target can be aimed rapidly and accurately, and a field of vision necessary to determine a surrounding situation can be secured. 
     The dot sighting device performs zeroing by moving a light source, but adjusting units for moving the light source are arranged on different surfaces of the dot sighting device (for example, the adjusting units are arranged in directions symmetrical to each other), and thus it is inconvenient to use. 
     A zeroing method of performing zeroing by operating the adjusting units arranged on the different surfaces causes a time delay in a situation in which rapid zeroing is required. 
     In addition, when the dot sighting device is designed, since the adjusting units for zeroing are arranged on the different surfaces, the volume of the dot sighting device is increased. 
     BRIEF SUMMARY 
     In an example, a sighting device includes a body, a light emitting unit, a bracket, a first adjusting unit and a second adjusting unit. The body couples to an arm having a barrel. The body is disposed relative to the arm in a first direction defined on an up and down axis. A third direction is defined as a direction of the barrel on a front and back axis. A second direction is defined as a left and right axis. The bracket couples to the light emitting unit. The first adjusting unit couples the bracket to the body and moves the bracket relative to the body in the third direction. The second adjusting unit couples the bracket to the body and moves the bracket relative to the body in the first direction. 
     In another example, a sighting device includes a body, a light emitting unit, a bracket, a first adjusting unit and a second adjusting unit. The body couples to an arm having a barrel. The body is disposed relative to the arm in a first direction defined on an up and down axis. A third direction is defined as a direction of the barrel on a front and back axis. A second direction is defined as a left and right axis. The bracket couples to the light emitting unit. The first adjusting unit couples the bracket to the body and moves the bracket relative to the body in the first direction. The second adjusting unit couples the bracket to the body and moves the bracket relative to the body in the third direction. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a better understanding of the aforementioned embodiments as well as additional embodiments thereof, reference should be made to the Detailed Description below, in conjunction with the following drawings in which like reference numerals refer to corresponding parts throughout the figures. 
         FIG. 1  is a perspective view illustrating a dot sighting device according to the first embodiment; 
         FIG. 2  is a perspective view illustrating a first aiming point moving unit and a second aiming point moving unit illustrated in  FIG. 1 ; 
         FIG. 3  is an exploded perspective view illustrating the first aiming point moving unit and the second aiming point moving unit according to the first embodiment; 
         FIG. 4  is a partial cross-sectional plan view illustrating the first aiming point moving unit and the second aiming point moving unit; 
         FIG. 5  is a partial cross-sectional plan view illustrating an operation of the second aiming point moving unit; 
         FIG. 6  is a partial cross-sectional plan view illustrating an operation of the first aiming point moving unit; 
         FIGS. 7A and 7B  are plan views illustrating a zeroing operation for adjusting an aiming point through the first and second aiming point moving units according to the first embodiment; 
         FIG. 8  is a cross-sectional view taken along line of A-A′ of  FIG. 4 ; 
         FIG. 9  is a cross-sectional view taken along line of B-B′ of  FIG. 4 ; 
         FIG. 10  is a perspective view illustrating a dot sighting device according to a second embodiment of the present disclosure; 
         FIG. 11  is a perspective view illustrating a first aiming point moving unit and a second aiming point moving unit according to the second embodiment; 
         FIG. 12  is an exploded perspective view illustrating the first aiming point moving unit and the second aiming point moving unit according to the second embodiment; 
         FIG. 13  is a partial cross-sectional plan view illustrating the first aiming point moving unit and the second aiming point moving unit according to the second embodiment; 
         FIG. 14  is a partial cross-sectional plan view illustrating an operation of the second aiming point moving unit; 
         FIG. 15  is a partial cross-sectional plan view illustrating an operation of the first aiming point moving unit; 
         FIGS. 16A and 16B  are views illustrating a zeroing operation for adjusting an aiming point through the first and second aiming point moving units according to the second embodiment; and 
         FIG. 17  is a cross-sectional view taken along line of C-C′ of  FIG. 13 . 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, preferred embodiments will be described in detail with reference to the drawings. Note that, in this specification and the drawings, elements that have substantially the same function and structure are denoted with the same reference signs, and repeated explanation is omitted. 
     First, a dot sighting device according to a first embodiment will be described with reference to  FIGS. 1 to 9 . 
       FIG. 1  is a perspective view illustrating a dot sighting device according to the first embodiment.  FIG. 1  illustrates a state in which the dot sighting device is upside down.  FIG. 2  is a view illustrating a first aiming point moving unit and a second aiming point moving unit illustrated in  FIG. 1 .  FIG. 3  is an exploded perspective view illustrating the first aiming point moving unit and the second aiming point moving unit according to the first embodiment.  FIG. 4  is a plan view illustrating the first aiming point moving unit and the second aiming point moving unit.  FIG. 5  is a view illustrating an operation of the second aiming point moving unit.  FIG. 6  is a view illustrating an operation of the first aiming point moving unit.  FIGS. 7A and 7B  are views illustrating a zeroing operation for adjusting an aiming point through the first and second aiming point moving units according to the first embodiment.  FIG. 8  is a cross-sectional view taken along line of A-A′ of  FIG. 4 , and  FIG. 9  is a cross-sectional view taken along line of B-B′ of  FIG. 4 . 
     In the drawings, a first axis refers to a Z axis, a second axis refers to a Y axis, and a third axis refers to a X axis. 
     As illustrated in  FIGS. 1 to 7B , the dot sighting device according to the present embodiment includes a sight body  110 , an aiming point generation unit  120 , a first aiming point moving unit  130 , and a second aiming point moving unit  140 . The sight body  110  includes a window  111  through which a target is aimed at. The sight body  110  preferably has a rectangular parallelepiped shape. The aiming point generation unit  120  includes a light source  121  that is arranged inside the sight body  110  and emits an aiming point to be projected onto the window  111 . The first aiming point moving unit  130  including a first adjusting unit  131  that is coupled with the light source  121  and moves the aiming point on the window  111  in a first axis direction by moving the light source  121 . The second aiming point moving unit  140  includes a second adjusting unit  141  that is coupled with the light source  121  and moves the aiming point on the window  111  in a second axis direction orthogonal to the first axis direction by moving the light source  121 . The second adjusting unit  141  and the first adjusting unit  131  are arranged the same surface. 
     The first aiming point moving unit  130  and the second aiming point moving unit  140  are used for zeroing of the dot sighting device of the present embodiment. For the sake of the user&#39;s convenient zeroing, the first adjusting unit  131  and the second adjusting unit  141  are arranged to be adjacent to each other, that is, in parallel. 
     The first adjusting unit  131  and the second adjusting unit  141  can be arranged together in any one of the first axis direction and the second axis direction from the center of the sight body  110 , but, for the sake of convenience of description, the description will proceed with an example in which the first adjusting unit  131  and the second adjusting unit  141  are arranged together in the second axis direction from the center of the sight body  110 . 
     The sight body  110  is removably coupled to a firearm, for example, a small arm such as a handgun, a pistol, or a rifle or a machine gun. The aiming point generation unit  120  is arranged inside the sight body  110 , and the first adjusting unit  131  and the second adjusting unit  141  are exposed for zeroing. 
     In the present embodiment, the window  111  may be provided with a protection glass (not illustrated) for protecting a beam splitter  126  (which will be described later). 
     The aiming point generation unit  120  includes the light source  121  that emits light for forming the aiming point to be projected onto the window  111  and the beam splitter  126  that reflects at least part of the light emitted from the light source  121  toward the window  111 . 
     As illustrated in  FIG. 3 , the light source  121  includes a light emitting unit  122  that emits light and a fixing bracket  123  for fixing the light emitting unit  122 . The light emitting unit  122  is configured with a light emitting diode (LED), but the present invention is not limited thereto, and any other type of emitting element can be used as the light emitting unit  122 . 
     The light source  121  is arranged in the first axis direction from the center of the sight body  110  to emit toward the beam splitter  126 . In the present embodiment, the light source  121  is arranged below the center of the sight body  110  to emit the light toward the beam splitter  126  arranged above the light source  121 . 
     The beam splitter  126  is arranged above the light source  121 , and reflects the light emitted from the light source  121  toward the window  111 . The beam splitter  126  may be configured with a beam splitting prism  127  in which two right-angled prisms are combined. 
     In other words, preferably, 50% reflective coating is applied to one of two inclined planes S forming the boundary between the two right-angled prisms, and then the two right-angled prisms bond with each other, so that the beam splitter  126  that passes 50% and reflects 50% is formed. The beam splitter  126  reflects at least part (for example, 50%) of the light emitted from the light source  121  toward the window  111 . In other words, the light emitted from the light source  121  is reflected in the third axis direction by the inclined plane S of the beam splitter  126 . 
     Light reflected by an external target passes through the beam splitter  126  and the window  111  and reaches the eyes of the user. 
     The first aiming point moving unit  130  functions to move the aiming point on the window  111  in the first axis direction. To this end, the first aiming point moving unit  130  includes the first adjusting unit  131  that moves the aiming point on the window  111  in the first axis direction by moving the light source  121 . 
     The first adjusting unit  131  is rotatably supported to the sight body  110 . In the present embodiment, as illustrated in  FIG. 3 , the first adjusting unit  131  includes a rotational shaft  131   a  that is rotatably coupled to the sight body  110 , a thread portion  131   b  that is formed on the rotational shaft  131   a  and meshes with a first movement block  132  which will be described later, and a head portion  131   c  that is coupled to the rotational shaft  131   a  and used to rotate the rotational shaft  131   a.    
     The first aiming point moving unit  130  further includes the first movement block  132  that meshes with the first adjusting unit  131  and moves in the second axis direction by the first adjusting unit  131  and a second movement block  133  that is coupled to the first movement block  132  and moves in the third axis direction orthogonal to the first axis direction and the second axis direction by the first movement block  132 . The light source  121  is coupled to the second movement block  133 . 
     The first movement block  132  meshes with the thread portion  131   b  and performs straight line movement in the second axis direction with the rotational movement of the first adjusting unit  131 . 
     The first movement block  132  is movably coupled to an inner wall of the sight body  110  and performs straight line movement other than rotational movement when the first adjusting unit  131  performs rotational movement. 
     The second movement block  133  is arranged between the fixing bracket  123  and the first movement block  132  and coupled to the fixing bracket  123  and the first movement block  132 . The second movement block  133  moves in the third axis direction with the movement of the first movement block  132  and moves the light source  121  coupled to the second movement block  133  in the third axis direction (see  FIG. 6 ). 
     A contact surface between the first movement block  132  and the second movement block  133  is preferably inclined at an angle of 45° with respect to the second axis direction and the third axis direction so that the second movement block  133  moves in the third axis direction with the movement of the first movement block  132  in the second axis direction. When the angle of the contact surface between the first movement block  132  and the second movement block  133  is less than 45°, more accurate zeroing can be performed. In other words, the angle of the contact surface between the first movement block  132  and the second movement block  133  may be equal to or larger than 10° and equal to or less than 45°. 
     The first aiming point moving unit  130  further includes a pressurizing member  134  that is coupled to the second aiming point moving unit  140  and elastically pressurizes the light source  121  toward the second movement block  133 . 
     In the present embodiment, the pressurizing member  134  is supported to the third movement block  142 , and elastically pressurizes the fixing bracket  123  toward the second movement block  133 . In the present embodiment, the pressurizing member  134  is configured with a spring that elastically biases the light source  121  toward the second movement block  133 . 
     As the pressurizing member  134  elastically pressurizes the light source  121  toward the second movement block  133 , the light source  121  can moves a positive or negative direction in the third axis direction. 
     The movement of the light source  121  in the third axis direction causes the aiming point on the window  111  in the first axis direction as illustrated in  FIG. 7A . 
     The second aiming point moving unit  140  moves the aiming point on the window  111  in the second axis direction. To this end, the second aiming point moving unit  140  includes the second adjusting unit  141  that moves the light source  121  so that the aiming point on the window  111  moves in the second axis direction. 
     The second adjusting unit  141  is rotatably supported to the sight body  110 . In the present embodiment, the second adjusting unit  141  includes a rotational shaft  141   a  that is rotatably coupled to the sight body  110 , a thread portion  141   b  that is formed on the rotational shaft  141   a  and meshes with the third movement block  142  which will be described later, and a head portion  141   c  that is coupled to the rotational shaft  141   a  and used to rotate the rotational shaft  141   a . By rotating or fastening or loosening the head portions  131   c  and  141   c  using a screw driver, a wrench, or the like, the first and second adjusting units  131  and  141  move in the second axis direction. In the present embodiment, each of the head portions  131   c  and  141   c  is preferably a slotted head and may be any other type of head such as a Phillips head, a square drive head, or the like. Each of the head portions  131   c  and  141   c  may be configured in a knob form. 
     The second aiming point moving unit  140  further includes the third movement block  142  that meshes with the second adjusting unit  141 , moves in the second axis direction with the movement of the second adjusting unit  141 , and supports the light source  121 . 
     The third movement block  142  meshes with the thread portion  141   b  and performs straight line movement in the second axis direction with the rotational movement of the second adjusting unit  141 . The third movement block  142  is movably coupled to the inner wall of the sight body  110 , and performs straight line movement other than rotational movement with the rotational movement of the second adjusting unit  141 . 
     With the movement of the third movement block  142  in the second axis direction, the light source  121  moves in the second axis direction (see  FIG. 5 ). 
     The movement of the light source  121  in the second axis direction causes the aiming point on the window  111  to move in the second axis direction as illustrated in  FIG. 7B . 
     The first aiming point moving unit  130  further includes a first support member  135  that is arranged above the first movement block  132  to limit the movement of the first movement block  132  in the first axis direction according to the rotation of the first adjusting unit  131  and a pressurizing member  136  that is arranged between the first movement block  132  and the sight body  110  and elastically pressurizes the first movement block  132  along the second axis. 
     The first support member  135  is fixed at a predetermined distance from one side (a right side in  FIG. 4 ) the sight body  110  so that the first movement block  132  is interposed between the sight body  110  and the first support member  135  as illustrated in  FIG. 8 . The first movement block  132  arranged between the first support member  135  and the sight body  110  is guided to move in the second axis direction but limited not to move in the first axis direction intersecting with a plane defined by the second axis and the third axis. Thus, the first movement block  132  performs straight line movement with the rotation of the first adjusting unit  131 , and at this time, the movement of the first movement block  132  in the first axis direction is prevented. A first fixing piece  135   a  is coupled to the first support member  135  to support the first adjusting unit  131  so that the first adjusting unit  131  is rotatable. The first fixing piece  135   a  is preferably integrally with the first support member  135 . 
     The first support member  135  is arranged above the first movement block  132  and the second movement block  133  to limit the movement of the first movement block  132  in the first axis direction and the movement of the second movement block  133  in the first axis direction at the same time. 
     The pressurizing member  136  may be configured with a coil-like spring into which the rotational shaft  131   a  is inserted. Since the first movement block  132  meshes with the thread portion  131   b , that is, since the male thread  131   b  meshes with the female thread formed on the inner wall of the first movement block  132 , there may be a slight assembly error in the second axis direction, and the assembly error reduces the aiming accuracy. However, since the first movement block  132  is elastically supported in one direction on the second axis by the pressurizing member  136 , the movement is performed in the state in which the male thread  131   b  comes into close contact with the female thread, and thus the reduction in the aiming accuracy by the assembly error can be prevented. 
     For the sake of convenience of assembly, preferably, the first fixing piece  135   a  is arranged at a side of one end of the rotational shaft  131   a , and the pressurizing member  136  is arranged at a side of the other end of the rotational shaft  131   a  that is exposed from the first movement block  132 . 
     The second aiming point moving unit  140  further includes a second support member  143  that is arranged above the third movement block  142  and fixed to the sight body  110  to limit the movement of the third movement block  142  in the first axis direction with the rotation of the second adjusting unit  141  and a pressurizing member  144  that is arranged between the third movement block  142  and the sight body  110  and elastically pressurizes the third movement block  142  in one direction on the second axis. 
     The second support member  143  is fixed at a predetermined distance from one side (a left side in  FIG. 4 ) of the sight body  110  so that the third movement block  142  is interposed between the second support member  143  and the sight body  110 . The third movement block  142  arranged between the second support member  143  and the sight body  110  is guided to move in the second axis direction and limited not to move in the first axis direction intersecting with the plane defined by the second axis and the third axis. Thus, the third movement block  142  performs straight line movement in the second axis direction with the rotation of the second adjusting unit  141 , and at this time, the movement of the third movement block  142  in the first axis direction is prevented. A second fixing piece  143   a  is coupled to the second support member  143  to support the second adjusting unit  141  so that the second adjusting unit  141  is rotatable. The second fixing piece  143   a  is preferably integrally with the second fixing piece  143   a.    
     The pressurizing member  144  may be configured with a coil-like spring into which the rotational shaft  141   a  is inserted and used to prevent the reduction in the aiming accuracy by the assembly error of the third movement block  142  and the second adjusting unit  141 , similarly to the pressurizing member  136 . 
     For the sake of convenience of assembly, preferably, the second fixing piece  143   a  is arranged at a side of one end of the rotational shaft  141   a , and the pressurizing member  144  is arranged at a side of the other end of the rotational shaft  141   a  that is exposed from the third movement block  142 . 
     The first movement block  132  and the second movement block  133 , the second movement block  133  and the fixing bracket  123 , and the fixing bracket  123  and the third movement block  142  come into contact with each other in the first axis direction and are engaged with each other such that the movement thereof in the first axis direction is limited. 
     Specifically, as illustrated in  FIGS. 8 and 9 , the first movement block  132  includes an engagement protrusion  132   a , and the second movement block  133  includes an engagement recess  133   b . The first movement block  132  is engaged with the second movement block  133  such that the engagement protrusion  132   a  is inserted into the engagement recess  133   b . The second movement block  133  further includes an engagement protrusion  133   a , and the fixing bracket  123  includes an engagement recess  123   b . The second movement block  133  is engaged with the fixing bracket  123  such that the engagement protrusion  133   a  is inserted into the engagement recess  123   b . The fixing bracket  123  further includes an engagement protrusion  123   a , and the third movement block  142  includes an engagement recess  142   b . The fixing bracket  123  is engaged with the third movement block  142  such that the engagement protrusion  123   a  is inserted into the engagement recess  142   b . Thus, the first movement block  132  and the second movement block  133  that are engaged with each other in the first axis direction and the fixing bracket  123  and the third movement block  142  that are engaged with in the first axis direction are interposed between the first support member  135  and the second support member  143  and the sight body  110 , the movement of the first movement block  132 , the second movement block  133 , the fixing bracket  123 , and the third movement block  142  in the first axis direction can be effectively limited. 
     Next, a zeroing operation of the dot sighting device according to the present embodiment will be described with reference to  FIGS. 1 to 7 . 
     When the second adjusting unit  141  is rotated in order to move the aiming point on the window  111  in the second axis direction (any one of the positive and negative directions) for zeroing, the third movement block  142  moves in the second axis direction with the rotation of the second adjusting unit  141  as illustrated in  FIG. 5 . 
     The movement of the third movement block  142  causes the light source  121  supported to the third movement block  142  to move in the second axis direction. As the light source  121  moves in the second axis direction, the aiming point on the window  111  moves in the second axis direction as illustrated in  FIG. 7B . 
     In addition, when the first adjusting unit  131  is rotated (for example, in the state of  FIG. 5 ) in order to move the aiming point on the window  111  in the first axis direction for zeroing, the first movement block  132  moves in the second axis direction with the rotation of the second adjusting unit  141  as illustrated in  FIG. 6 . 
     The movement of the first movement block  132  in the second axis direction causes the second movement block  133  to move in the third axis direction, and thus the light source  121  moves in the third axis direction with the movement of the second movement block  133 . 
     As the light source  121  moves in the third axis direction, the aiming point on the window  111  to moves in the first axis direction as illustrated in  FIG. 7A . 
     As described above, in the dot sighting device according to the present embodiment, the first adjusting unit  131  and the second adjusting unit  141  that move the light source  121  emitting the aiming point to be projected onto the window  111  in the first axis direction and the second axis direction are arranged on the same plane or surface to be adjacent to each other, that is, in parallel, and thus the user can move the aiming point in the first axis direction and the second axis direction for zeroing rapidly and conveniently. 
       FIG. 10  is a perspective view illustrating a dot sighting device according to a second embodiment of the present invention.  FIG. 11  is a view illustrating a first aiming point moving unit and a second aiming point moving unit according to the second embodiment.  FIG. 12  is an exploded perspective view illustrating the first aiming point moving unit and the second aiming point moving unit according to the second embodiment.  FIG. 13  is a plane view illustrating the first aiming point moving unit and the second aiming point moving unit according to the second embodiment.  FIG. 14  is a view illustrating an operation of the second aiming point moving unit.  FIG. 15  is a view illustrating an operation of the first aiming point moving unit.  FIGS. 16A and 16B  are views illustrating a zeroing operation for adjusting an aiming point through the first and second aiming point moving units according to the second embodiment.  FIG. 17  is a cross-sectional view taken along line of C-C′ of  FIG. 13 . 
     The description will proceed with different points with the first embodiment. 
     In the present embodiment, a light source  221  is arranged on the side of the sight body  210 , that is, on the right side in  FIG. 10 , and emits light toward a beam splitter  226 . 
     The beam splitter  226  reflects the light emitted from the light source  221  toward a window  211 . The beam splitter  226  has the same configuration as that of the first embodiment. Specifically, in the present embodiment, the beam splitter  226  is configured with a beam splitting prism  227  in which two right-angled prisms are combined, similarly to the first embodiment. The beam splitter  226  has an inclined plane S that reflects the light emitted from the light source  221  in the third axis direction to which the gun barrel is parallel, similarly to the first embodiment. 
     In the present embodiment, the light source  221  includes a light emitting unit  222  that emits light and a fixing bracket  223  for fixing the light emitting unit  222 . 
     In the present embodiment, a first aiming point moving unit  230  moves the aiming point on the window  211  in the first axis direction. To this end, the first aiming point moving unit  230  includes a first adjusting unit  231  that is rotatably supported to the sight body  210  and a fourth movement block  232  that meshes the first adjusting unit  231 , supports the light source  221 , and moves in the first axis direction by the movement of the first adjusting unit  231 . 
     The first adjusting unit  231  includes a rotational shaft  231   a  that is rotatably coupled to the sight body  210 , a thread portion  231   b  that is formed on the rotational shaft  231   a  and meshes with the fourth movement block  232  which will be described later, and a head portion  231   c  that is coupled to the rotational shaft  231   a  and used to rotate the rotational shaft  231   a.    
     The fourth movement block  232  meshes with the thread portion  231   b  and moves in the first axis direction with the rotation of the head portion  231   c . Since the fourth movement block  232  supports the light source  221 , the light source  221  moves in the first axis direction with the movement of the fourth movement block  232  in the first axis direction (see  FIG. 13 ). 
     As the light source  221  moves in the first axis direction, the aiming point on the window  211  moves in the first axis direction as illustrated in  FIG. 16B . 
     The light source  221  is supported to the fourth movement block  232  to be rotatable in the third axis direction. To this end, the fourth movement block  232  includes a guide bar  232   a  that is inserted into a guide recess  223   b  of the fixing bracket  223 . 
     The guide bar  232   a  of the fourth movement block  232  is inserted into the guide recess  223   b , synchronizes the movement of the fourth movement block  232  in the first axis direction with the movement of the light source  221 , and guides the movement of the light source  221  in the third axis direction. 
     In the present embodiment, a second aiming point moving unit  240  moves the aiming point on the window  211  in the second axis direction. To this end, the second aiming point moving unit  240  includes a second adjusting unit  241  that is rotatably supported to the sight body  210  and a fifth movement block  242  that meshes with the second adjusting unit  241 , moves in the third axis direction with the movement of the second adjusting unit  241 , and moves the light source  221  in the third axis direction. The light source  221  is coupled to the fifth movement block  242  to be movable in the first axis direction. 
     The second adjusting unit  241  is rotatably supported to the sight body  210  and rotates to move the light source  221  in the third axis direction. The second adjusting unit  241  includes a rotational shaft  241   a  that is rotatably coupled to the sight body  210 , a thread portion  241   b  that is formed on the rotational shaft  241   a  and meshes with the fifth movement block  242  which will be described later, and a head portion  241   c  that is coupled to the rotational shaft  241   a  and used to rotate the rotational shaft  241   a . In the present embodiment, each of the head portions  231   c  and  241   c  is preferably a slotted head and may be any other type of head such as a Phillips head, a square drive head, or the like. Each of the head portions  231   c  and  241   c  may be configured in a knob form. 
     The fifth movement block  242  meshes with the thread portion  241   b  and moves in the third axis direction with the rotation of the head portion  241   c  (see  FIG. 14 ). 
     The fifth movement block  242  is coupled to the light source  221  and moves in the third axis direction to move the light source  221  in the third axis direction. As the light source  221  moves in the third axis direction, the aiming point on the window  211  moves in the second axis direction as illustrated in  FIG. 16A . 
     The light source  221  is coupled to the fifth movement block  242  so that the light source  221  is movable in the first axis direction. To this end, the fifth movement block  242  includes a guide hole  242   a  that guides the movement of the light source  221  in the first axis direction. Preferably, the guide hole  242   a  has a long rectangular hole, and guides the movement of the light source  221  as the light source  221  is moved in the first axis direction by the first aiming point moving unit  230 . However, the shape of the guide hole  242   a  is not limited thereto. 
     Thus, the movement of the light source  221  is confined to the movement of the fifth movement block  242  in the third axis direction. As the fifth movement block  242  moves in the third axis direction, the light source  221  moves in the third axis direction together with the fifth movement block  242 , and as the fourth movement block  232  moves in the first axis direction, the light source  221  moves along the guide hole  242   a  of the fifth movement block  242  in the first axis direction. 
     The first aiming point moving unit  230  further includes a pressurizing member  233  that elastically pressurizes the fourth movement block  232  in one direction on the first axis. The rotational shaft  231   a  is inserted into the pressurizing member  233 , and thus the pressurizing member  233  is arranged between the fourth movement block  232  and the head portion  231   c.    
     The pressurizing member  233  may be configured with a coil-like spring. Since the fourth movement block  232  meshes with the thread portion  231   b , that is, since the male thread  231   b  meshes with the female thread formed on the inner wall of the fourth movement block  232 , there may be a slight assembly error in the first axis direction, and the assembly error reduces the aiming accuracy. However, since the fourth movement block  232  is elastically supported in one direction on the first axis by the pressurizing member  233 , the movement is performed in the state in which the male thread  231   b  comes into close contact with the female thread, and thus the reduction in the aiming accuracy by the assembly error can be prevented. 
     The first aiming point moving unit  230  may further include a pressurizing member  234  that is coupled to the second aiming point moving unit  240  and elastically pressurizes the light source  221  toward the fourth movement block  232 . Elastic force of the pressurizing member  234  is set to be relatively larger or smaller than that of the pressurizing member  233 , and the pressurizing member  234  preferably causes the fourth movement block  232  to be elastically supported in one direction in a shaft direction of the first adjusting unit  231 . 
     In the present embodiment, the pressurizing member  234  is supported to the fifth movement block  242  and elastically the fixing bracket  223  toward the fourth movement block  232 . In the present embodiment, the pressurizing member  234  is configured with a spring that elastically biases the light source  221  toward the fourth movement block  232 . As the pressurizing member  234  elastically pressurizes the light source  221  toward the fourth movement block  232 , the light source  221  can move in the positive or negative direction in the first axis direction. 
     The first aiming point moving unit  230  further includes a third support member  235  that is arranged above the fourth movement block  232  and coupled to the sight body  110 . The third support member  235  limits the movement of the fourth movement block  232  in the second axis direction with the rotation of the first adjusting unit  231 . 
     Particularly, as illustrated in  FIG. 17 , in the state in which the fourth movement block  232  and the fifth movement block  242  are interposed between the sight body  110  and the third support member  235 , the fourth movement block  232  and the fifth movement block  242  are guided to move in the first axis and the third axis but limited not to move in the second axis direction intersecting with the plane defined by the first axis and the third axis. 
     The fifth movement block  242  and the fixing bracket  223  come into contact with each other in the second axis direction and are engaged with each other such that the movement thereof in the second axis direction is limited. 
     Specifically, as illustrated in  FIG. 17 , the fixing bracket  223  includes an engagement protrusion  223   a , and the fifth movement block  242  includes an engagement recess  242   b . The fixing bracket  223  is engaged with the fifth movement block  242  such that the engagement protrusion  223   a  is inserted into the engagement recess  242   b , and thus the movement of the fixing bracket  223  in the second axis direction is limited. At this time, the movement of the fifth movement block  242  in the second axis direction is limited by the guide bar  232  of the fourth movement block  232 , and the movement of the fourth movement block  232  in the second axis direction is limited by the third support member  235 . In other words, the fixing bracket  223 , the fifth movement block  242 , and the fourth movement block  232  are sequentially stacked on the sight body  110 , and the movement of the fourth movement block  232  in the second axis direction is limited by the third support member  235 . Thus, the movement of the fixing bracket  223 , the fifth movement block  242 , and the fourth movement block  232  in the second axis direction can be effectively limited. 
     The second aiming point moving unit  240  further include a pressurizing member  243  that elastically pressurizes the fifth movement block  242  in one direction on the third axis. The rotational shaft  241   a  is inserted into the pressurizing member  233 , and thus the pressurizing member  233  is arranged between the fifth movement block  242  and the head portion  241   c.    
     The pressurizing member  243  may be configured with a coil-like spring. Similarly to the pressurizing member  233 , the pressurizing member  243  prevents the reduction in the aiming accuracy by the assembly error of the fifth movement block  242  and the second adjusting unit  241 . 
     Next, a zeroing operation of the dot sighting device according to the present embodiment will be described with reference to  FIGS. 10 to 16 . 
     When the second adjusting unit  241  is rotated in order to move the aiming point on the window  211  in the second axis direction (any one of the positive and negative directions) for zeroing, the fifth movement block  242  moves in the third axis direction with the rotation of the second adjusting unit  241  as illustrated in  FIG. 14 . 
     The movement of the fifth movement block  242  causes the light source  221  supported to the fifth movement block  242  to move in the third axis direction. As the light source  221  moves in the third axis direction, the aiming point on the window  211  moves in the second axis direction as illustrated in  FIG. 16B . 
     In addition, when the first adjusting unit  231  is rotated (for example, in the state of  FIG. 14 ) in order to move the aiming point on the window  211  in the first axis direction for zeroing, the fourth movement block  232  moves in the first axis direction with the rotation of the first adjusting unit  231  as illustrated in  FIG. 15 . 
     The movement of the fourth movement block  232  in the first axis direction causes the fourth movement block  232  to move in the first axis direction, and the light source  221  moves in the first axis direction with the movement of the fourth movement block  232 . 
     As the light source  221  moves in the first axis direction, the aiming point on the window  211  moves in the first axis direction as illustrated in  FIG. 16B . 
     As described above, in the dot sighting device according to the present embodiment, the first adjusting unit  231  and the second adjusting unit  241  that move the light source  221  emitting the aiming point to be projected onto the window  211  in the first axis direction and the second axis direction are arranged on the same plane or surface to be adjacent to each other, that is, perpendicular to each other, and thus the user can move the aiming point in the first axis direction and the second axis direction for zeroing rapidly and conveniently. 
     In light of the foregoing, an exemplary object of the present disclosure to provide a dot sighting device capable of enabling the user to zero rapidly. 
     It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the embodiments as defined in the following claims. While various embodiments in accordance with the disclosed principles have been described above, it should be understood that they have been presented by way of example only, and are not limiting. Thus, the breadth and scope of the invention(s) should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the claims and their equivalents issuing from this disclosure. Furthermore, the above advantages and features are provided in described embodiments, but shall not limit the application of such issued claims to processes and structures accomplishing any or all of the above advantages. 
     While any discussion of or citation to related art in this disclosure may or may not include some prior art references, applicant neither concedes nor acquiesces to the position that any given reference is prior art or analogous prior art. 
     Additionally, the section headings herein are provided for consistency with the suggestions under 37 CFR 1.77 or otherwise to provide organizational cues. These headings shall not limit or characterize the invention(s) set out in any claims that may issue from this disclosure. Specifically and by way of example, the claims should not be limited by the language chosen under a heading to describe the so-called technical field. Further, a description of a technology in the “Background” is not to be construed as an admission that technology is prior art to any invention(s) in this disclosure. Neither is the “Brief Summary” to be considered as a characterization of the invention(s) set forth in the claims found herein. Furthermore, any reference in this disclosure to “invention” in the singular should not be used to argue that there is only a single point of novelty claimed in this disclosure. Multiple inventions may be set forth according to the limitations of the multiple claims associated with this disclosure, and the claims accordingly define the invention(s), and their equivalents, that are protected thereby. In all instances, the scope of the claims shall be considered on their own merits in light of the specification, but should not be constrained by the headings set forth herein.