TWI829049B - Sighting device - Google Patents

Abstract

A sighting device includes a housing, an objective lens unit, an ocular lens unit, an erector unit, an adjusting unit, a light-emitting unit and a light-receiving unit. The housing defines a radial direction and a second central axis. The objective lens unit is disposed at an end of the housing. The ocular lens unit is disposed at another end of the housing in opposite to the objective lens unit. The erector unit is disposed between the objective lens unit and the ocular lens unit. The adjusting unit is movably connected to the housing and propped against the erector unit in the radial direction for adjustment of the erector. The light-emitting unit is disposed on the erector unit and includes a light source for emitting a beam to an object. The light-receiving unit is disposed on the erector unit and includes an optical sensor for receiving the beam reflected by the object. The housing in cross section has an outer circumference, and distances from the second central axis to all points on the outer circumference of the housing are almost equal.

Description

aiming device

The present invention relates to a sighting device, and in particular to a sighting device having the appearance dimensions of a general sight and having a ranging function.

General sights do not have a range-measuring function. Sights with a range-finding function usually have different shapes depending on their design, and require special clamps to be installed on the gun. They cannot be used with ordinary sights. clamping piece.

The object of the present invention is to provide a sighting device that not only has a ranging function, but also has the appearance dimensions of a general sight, and can be installed on a gun using a general clamping member.

One embodiment of the aiming device of the present invention includes a housing, an objective lens unit, an eyepiece unit, an upright unit, an adjustment unit, a light emitting unit and a light receiving unit. The housing includes a radial axis and a second central axis. The objective lens unit is arranged at one end of the housing. The eyepiece unit is disposed at the other end of the housing relative to the objective lens unit. The erect unit is disposed between the objective lens unit and the eyepiece unit. The adjustment unit is movably disposed on the housing and contacts the upright unit along the radial direction to adjust the upright unit. The light emitting unit is disposed on the upright unit and includes a light source to emit a light beam that is reflected by an object. The light receiving unit is arranged on the upright unit and includes a light sensor to receive the light beam reflected by the object. The distance between any point on the cross section of the outer surface of the housing and the second central axis is almost equal.

In another embodiment, the housing includes a first clamping part and a second clamping part, which are arranged on both sides of the adjustment unit where the housing is arranged; the first clamping part and the second clamping part Both clamping parts are cylindrical, and the ratio of the length of the first clamping part to the length of the second clamping part is 0.5~2; the distance between any point on the cross section of the inner surface of the housing and the second central axis The distances are almost equal.

In another embodiment, the housing includes a first clamping part; the upright unit includes a first central axis; the light emitting unit further includes a first end face facing the objective lens unit, and on the first end face The farthest point from the first central axis is a first reference point; the light receiving unit further includes a second end face facing the objective lens unit, the second end face includes an outer edge, and the midpoint of the outer edge is a first Two reference points; the aiming device satisfies at least one of the following conditional expressions: 6≦D5/g3≦13; 8≦D6/g2≦14; where D5 is the distance from the second reference point to the first central axis, and g3 is The minimum distance between the light receiving unit and the first clamping part, D6 is the distance from the first reference point to the first central axis, and g2 is the minimum distance between the light emitting unit and the first clamping part.

In another embodiment, the housing includes a first clamping part; the upright unit includes a first central axis; the light emitting unit further includes a first end face facing the objective lens unit, and on the first end face The farthest point from the first central axis is a first reference point; the light receiving unit further includes a second end face facing the objective lens unit, the second end face includes an outer edge, and the midpoint of the outer edge is a first Two reference points; the first clamping part is cylindrical and has an inner diameter and an outer diameter; the aiming device satisfies at least one of the following conditional expressions: 4%≦|(D5-D6)/d1|≦6% ;4%≦|(D5-D6)/d2|≦6%, where D5 is the distance from the second reference point to the first central axis, and D6 is the distance from the first reference point to the first central axis, d1 is the inner diameter of the first clamping part, and d2 is the outer diameter of the first clamping part.

In another embodiment, the upright unit has a first central axis. When viewed along the direction of the first central axis, the light source and the light sensor are coincident or the angle relative to the first central axis is 180°.

In another embodiment, the upright unit includes a first lens and a second lens, the first lens is closer to the objective lens unit than the second lens; the first lens includes a first lens A side surface faces the eyepiece unit, and a second side surface faces the objective lens unit; the second side surface includes a third side surface facing the eyepiece unit, and a fourth side surface facing the objective lens unit; the light emitting unit includes a first end surface Toward the objective lens unit; the light receiving unit includes a second end face facing the objective lens unit; the aiming device satisfies the conditional expression 0.8≦|(D1-D2)/(D3-D4)|≦3, where D1 is the first end face The distance from the third side surface, D2 is the distance between the second end surface and the third side surface, D3 is the distance between the first side surface and the third side surface, and D4 is the distance between the second side surface and the third side surface.

In another embodiment, the upright unit includes a first central axis, a first lens and a second lens, the first lens being closer to the objective lens unit than the second lens; the first lens is closer to the objective lens unit than the second lens. The lens includes a first side facing the eyepiece unit and a second side facing the objective lens unit; the second lens includes a third side facing the eyepiece unit and a fourth side facing the objective unit; the light emission The unit includes a first end face facing the objective lens unit; the light receiving unit includes a second end face facing the objective lens unit; the first central axis intersects with the second side at a first intersection point, and intersects with the third side at a second intersection point; the point furthest away from the first central axis on the first end face is a first reference point; the second end face includes an outer edge and an inner edge, and the outer edge is farther from the upright unit Farther than the inner edge, the midpoint of the outer edge is a second reference point; the aiming device satisfies the conditional expression 0.2≦|(A1-A2)/(A3-A4)|≦0.6, where A1 is the second reference point The angle between the line connecting the reference point and the second intersection point and the first central axis, A2 is the angle between the line connecting the first reference point and the second intersection point and the first central axis, A3 is The angle between the line connecting the second reference point and the first intersection point and the first central axis, A4 is the angle between the line connecting the first reference point and the first intersection point and the first central axis.

In another embodiment, the upright unit includes a first frame, the first frame Closer to the objective lens unit than the light emitting unit, the housing includes a first clamping part. The first clamping part is cylindrical and has an inner diameter and an outer diameter. The aiming device meets at least one of the following requirements: Conditional expression: 3%≦g1/d1≦6%; 3%≦g1/d2≦6%, where g1 is the minimum distance between the first clamp and the first clamping part, and d1 is the first clamping part The inner diameter of , d2 is the outer diameter of the first clamping part.

In another embodiment, the housing includes a first clamping part, the first clamping part is cylindrical and has an inner diameter and an outer diameter, and the aiming device satisfies at least one of the following conditional expressions: 2 %≦g2/d1≦5%; 2%≦g2/d2≦5%, where g2 is the minimum distance between the light emitting unit and the first clamping part, d1 is the inner diameter of the first clamping part, d2 is the outer diameter of the first clamping part.

In another embodiment, the housing includes a first clamping part, the first clamping part is cylindrical and has an inner diameter and an outer diameter, and the aiming device satisfies at least one of the following conditional expressions: 2 %≦g3/d1≦6%; 2%≦g3/d2≦5%, where g3 is the minimum distance between the light receiving unit and the first clamping part, d1 is the inner diameter of the first clamping part, d2 is the outer diameter of the first clamping part.

10: Aiming device

110: Shell

111: First clamping part

113: Second clamping part

120:Objective lens unit

130:Eyepiece unit

140: Upright unit

141:The first 稜鏡

142:The second 稜鏡

150:Adjustment unit

160:Light emitting unit

161:Light source

163:Circuit board

165:First end face

170:Light receiving unit

171:Light sensor

173:Circuit board

175:Second end face

1411:First side

1412:Second side

1423:Third side

1424:The fourth side

1751:Outer edge

1753:Inner edge

A1, A2, A3, A4: included angle

C1: first central axis

C2: Second central axis

d1:inner diameter

d2:Outer diameter

g1, g2, g3: minimum spacing

D1, D2, D3, D4, D5, D6: distance

K1, K2, K3: circumscribed circle

L1, L2: length

P1: first reference point

P2: Second reference point

S1: first intersection point

S2: second intersection point

S3: The third intersection point

S4: fourth intersection point

S5: fifth intersection point

Figure 1 is a schematic diagram of an aiming device according to the present invention.

Figure 2 is a partial cross-sectional view of the upright unit according to the present invention.

Figure 3 is a plan view of the upright unit in Figure 2.

Figure 4A is a cross-sectional view along IVA-IVA of the aiming device in Figure 1.

Figure 4B is a cross-sectional view along IVB-IVB of the aiming device in Figure 1.

Figure 4C is a cross-sectional view of the aiming device in Figure 1 along IVC-IVC.

Please refer to Figure 1, which is a schematic diagram of the aiming device according to the present invention. The aiming device 10 of the present invention includes a housing 110, an objective lens unit 120 is provided at one end of the housing 110, and an eyepiece unit 130 is provided at the other end of the housing 110 relative to the objective lens unit 120. An upright unit 140 is provided between the objective lens unit 120 and the eyepiece unit 130. One end of the upright unit 140 close to the objective lens unit 120 is a free end, and the other end close to the eyepiece unit 130 is connected to a movable joint in the housing 110 ( (not shown), so that the upright unit 140 can change its attitude relative to the connecting end when acted upon by an external force. An adjustment unit 150 is further provided on the housing 110 . The adjustment unit 150 abuts against the upright unit 140 along the radial direction of the housing 110 . During operation, when the user faces an object (not shown) with the aiming device 10, the image of the object can reach the user's eyes via the objective lens unit 120, the upright unit 140 and the eyepiece unit 130, so as to facilitate aiming at the object. Then, the user can use the adjustment unit 150 to adjust the posture of the upright unit 140 to correct the impact.

In addition to the aiming function, the aiming device 10 of the present invention also has a ranging function. To achieve this purpose, the aiming device 10 of the present invention further includes a light emitting unit 160 and a light receiving unit 170 , both of which are connected to the upright unit 140 . Please also refer to Figure 2. Figure 2 is a partial cross-sectional view of an upright unit according to the present invention. The light emitting unit 160 includes a light source 161, such as a laser diode, which is mounted on the circuit board using Surface Mount Technology. 163, the light receiving unit 170 includes a light sensor 171, such as an avalanche photodiode, which is disposed on the circuit board 173 using surface mount technology. Due to the use of surface adhesive technology, the overall volume of the light emitting unit 160 and the light receiving unit 170 can be greatly reduced and installed in the housing 110, so that the aiming device 10 can have the appearance size of a general sight without the need to install the light emitting unit 160. And the light receiving unit 170 is specially designed in its appearance shape or enlarged size, and can be installed on the gun using the clamping member of a general sight. In addition, the above-mentioned light emitting unit 160 and the light receiving unit 170 are both surface mount components. However, it can be understood that if only one of them is a surface mount component, components, also belong to the scope of the present invention.

The aiming device 10 of the present invention further includes a first lens 141 and a second lens 142, which are disposed in the upright unit 140. The first lens 141 is closer to the objective lens unit 120 than the second lens 142. When measuring distance, the light source 161 emits a light beam, which passes through the first lens unit 141 and the objective lens unit 120 to reach the object (not shown). The light beam is reflected by the object and returns to the aiming device 10, passing through the objective lens unit 120 and the first lens unit 141. , the second beam 142 turns to reach the light sensor 171, and the distance of the object can be calculated by using the time difference between the beam emission and reception for the user's reference.

The structural details of the aiming device 10 of the present invention are further described below:

Please refer to Figure 1 again. The housing 110 includes a first clamping part 111 and a second clamping part 113, which are arranged on both sides of the adjusting unit 150 where the housing is installed. The first clamping part 111 and the second clamping part 113 The two clamping parts 113 are generally cylindrical, and the length L1 of the first clamping part 111 and the length L2 of the second clamping part 113 are at least 30mm. The ratio between the two is 0.5 or 2, and 0.5~2 is the present invention. scope of invention. Through the design of the first clamping part 111 and the second clamping part 113, the aiming device 10 of the present invention can be installed on the gun using the clamping parts of general sights. On the other hand, the position of the adjustment unit 150 can be as small as possible. Being close to the user makes it convenient for the user to operate the adjustment unit 150 .

The upright unit 140 has a first central axis C1, and the housing 110 has a second central axis C2. As mentioned above, the user can use the adjustment unit 150 to adjust the attitude of the upright unit 140 to correct the impact. The included angle between the first central axis C1 and the second central axis C2 may be 0°, and the included angle between the first central axis C1 and the second central axis C2 will change during adjustment. Specifically, when viewed along the direction of the second central axis C2, the angle between the first central axis C1 and the second central axis C2 has the maximum value at the upper (0°), lower (180°), left The square (270°) and right (90°) positions can reach 0.48°, and considering the tolerance of ±5%, the angles in the range of 0.456°~0.504° are within the scope of the present invention, and the upper right (45°) , the maximum angle at the lower right (135°), upper left (315°), and lower left (225°) positions can reach 0.68°, and considering the tolerance of ±5%, the angle is 0.646° Everything within the range of ~0.714° falls within the scope of the present invention. The housing 110 has an inner and an outer surface respectively, wherein the distance between the second central axis C2 and any point on the cross section of the outer surface of the housing 110 is almost equal, or the distance between the second central axis C2 and the housing 110 The distance between any point on the cross section of the inner surface is almost equal to reflect that the first clamping part 111 and the second clamping part 113 are generally cylindrical, and the first clamping part 111 and the second clamping part 113 have almost The inner and outer diameters are equal, of which the aforementioned ones are almost equal. Considering the tolerance of ±5%, the range can fall within 0.95%~1.05%.

In addition, when the user uses the adjustment unit 150 to adjust the posture of the upright unit 140, the minimum value of the gap between the upright unit 140 and the inner wall of the housing 110 is at the upper (0°), lower (180°), left (270°) °), the right (90°) position can reach approximately 1mm, and considering the tolerance of ±5%, the minimum value within the range of 0.95mm~1.05mm falls within the scope of the present invention. The minimum gap value is approximately 1.42mm at the upper right (45°), lower right (135°), upper left (315°), and lower left (225°) positions. Considering the tolerance of ±5%, the minimum value Everything within the range of 1.349mm~1.491mm falls within the scope of the present invention.

When viewed along the direction of the first central axis C1, the angle between the light source 161 and the photo sensor 171 relative to the first central axis C1 is 180°. Since the light source 161 and the photo sensor 171 are not disposed adjacent to each other, the angle between the light source 161 and the photo sensor 171 can be avoided. When the light source 161 accidentally leaks light, the light sensor 171 is less likely to receive light leakage from the light source 161 and thereby affect the distance measurement result. However, the present invention is not limited to this. It can be understood that, The position of the light source 161 and/or the light sensor 171 can also be changed so that the two positions coincide when viewed along the first central axis C1 direction (ie, 0°), which also falls within the scope of the present invention.

Please refer to Figure 2 and Figure 3 at the same time. Figure 3 is the plan view of the upright unit in Figure 2. The first lens 141 includes a first side 1411 facing the eyepiece unit 130 and a second side 1412 facing the objective lens unit 120 . The second lens 142 includes a third side 1423 facing the eyepiece unit 130 and a fourth side 1424 facing the objective lens unit 120 . The light emitting unit 160 includes a first end surface 165 facing the objective lens unit 120 . The light receiving unit 170 includes a second end surface 175 towards the objective lens unit 120 . In the present invention, the distance D1 between the first end surface 165 and the third side surface 1423 is 24.8mm~31.3mm, and considering the tolerance of ±5%, the distance D1 can be 23.56mm~32.865mm. The distance D2 between the side 1423 is 13.1mm~17.5mm, and considering the tolerance of ±5%, the distance D2 can be 12.445mm~18.375mm, and the distance D3 between the first side 1411 and the third side 1423 is 34.5mm~38.5mm. Considering the tolerance of ±5%, the distance D3 can be 32.775mm~40.425mm, and the distance D4 between the second side 1412 and the third side 1423 can be 39.5mm~45.5mm. Considering the tolerance of ±5%, the distance D4 can be It is 37.525mm~47.775mm.

The first central axis C1 intersects with the second side surface 1412 at a first intersection point S1, and intersects with the third side surface at a second intersection point S2. The point farthest from the first central axis C1 on the first end surface 165 is a first reference point P1. The distance from the first reference point P1 to the first central axis C1 is D6. In the present invention, the distance D6 can be 14.2mm. Considering the tolerance of ±5%, the distance D6 within the range of 13.49mm~14.91mm falls within the scope of the present invention. The second end surface 175 includes an outer edge 1751 and an inner edge 1753. The outer edge 1751 is farther from the upright unit 140 than the inner edge 1753. The midpoint of the outer edge 1751 is a second reference point P2. The distance from point P2 to the first central axis C1 is D5. The distance D5 in the present invention can be 12.4mm~12.5mm. Considering the tolerance of ±5%, the distance D5 within the range of 11.78mm~13.125mm falls within the scope of the present invention. The angle A1 between the line connecting the second reference point P2 and the second intersection point S2 and the first central axis C1 is 35°~55°. Considering the tolerance of ±5%, the angle is within the range of 33.25°~57.75°. Scope of the present invention: The angle A2 between the line connecting the first reference point P1 and the second intersection point S2 and the first central axis C1 is 24°~35°, and considering the tolerance of ±5%, the angle is 22.8°~36.75° All within the scope belong to the scope of the present invention; the angle A3 between the line connecting the second reference point P2 and the first intersection S1 and the first central axis C1 is 24°~29°, and considering the tolerance of ±5%, the angle is 22.8 The range of °~30.45° belongs to the scope of the present invention; the angle A4 between the line connecting the first reference point P1 and the first intersection point S1 and the first central axis C1 is approximately 60°; and the tolerance is ±5% After consideration, angles within the range of 57° to 63° fall within the scope of the present invention.

Please refer to Figure 4A. Figure 4A is a cross-sectional view of the aiming device in Figure 1 along IVA-IVA. The figure shows a third intersection point S3 between the first flange 141 and its circumscribed circle K1. The distance between the third intersection point S3 and the housing 110 is the minimum distance between the first flange 141 and the first clamping portion 111 of the housing 110. The spacing is equal to the distance marked by symbol g1 in the figure. The distance between the first handle 141 and the first clamping part 111 of the present invention is at least 1.38~1.88mm, and considering the tolerance of ±5%, the distance g1 can be 1.311mm~1.974mm. The inner diameter d1 of the first clamping portion 111 of the housing 110 of the present invention can be 31.5mm, and considering the tolerance of ±5%, the inner diameter d1 can be 29.925mm~33.075mm. The outer diameter d2 of the first clamping portion 111 of the housing 110 of the present invention can be 34mm, and considering the tolerance of ±5%, the outer diameter d2 can be 32.3mm~35.7mm.

Please refer to Figure 4B. Figure 4B is a cross-sectional view along IVB-IVB of the aiming device in Figure 1. The figure shows a fourth intersection S4 between the light emitting unit 160 and its circumscribed circle K2. The distance g2 between the fourth intersection S4 and the housing 110 is the minimum distance between the light emitting unit 160 and the first clamping part 111. The light emitting unit 160 of the present invention The distance between the transmitting unit 160 and the first clamping part 111 is at least 1.05~1.55mm, and considering the tolerance of ±5%, the distance g2 can be 0.9975mm~1.6275mm.

Please refer to Figure 4C, which is a cross-sectional view of the aiming device in Figure 1 along IVC-IVC. The figure shows a fifth intersection S5 between the light receiving unit 170 and its circumscribed circle K3. The distance between the fifth intersection S5 and the housing 110 is the minimum distance between the light receiving unit 170 and the first clamping part 111, which is equal to the figure. The distance marked by symbol g3. The distance between the light receiving unit 170 and the first clamping part 111 of the present invention is at least 1.02~1.63mm, and considering the tolerance of ±5%, the distance g3 can be 0.969mm~1.7115mm.

In this embodiment, the aiming device 10 further satisfies the following conditional expression:

6≦D5/g3≦13 (1)

8≦D6/g2≦14 (2)

4%≦｜(D5-D6)/d1｜≦6% (3)

4%≦｜(D5-D6)/d2｜≦6% (4)

2%≦g3/d1≦6% (5)

2%≦g3/d2≦5% (6)

2%≦g2/d1≦5% (7)

2%≦g2/d2≦5% (8)

3%≦g1/d1≦6% (9)

3%≦g1/d2≦6% (10)

0.2≦｜(A1-A2)/(A3-A4)｜≦0.6 (11)

0.8≦｜(D1-D2)/(D3-D4)｜≦3 (12)

The above symbols A1~A4, D1~D6 are marked in Figure 3, and the symbols d1~d2, g1~g3 are marked in Figures 4A~4C. The meaning of each symbol has been described previously, so it will not be repeated here. It can be understood that if the aiming device only satisfies some of the conditional expressions, it should also fall within the scope of the present invention.

With the above design, the aiming device of the present invention not only has a ranging function, but also has the appearance dimensions of a general sight. It can be installed on the gun using a general clamping piece, and there is no need to develop a special clamping piece for use. . On the other hand, the adjustment unit of the aiming device of the present invention can be positioned as close as possible to the user, making it convenient for the user to operate.

10: Aiming device

110: Shell

111: First clamping part

113: Second clamping part

120:Objective lens unit

130:Eyepiece unit

140: Upright unit

141:The first 稜鏡

142:The second 稜鏡

150:Adjustment unit

160:Light emitting unit

170:Light receiving unit

C1: first central axis

C2: Second central axis

Claims (10)

An aiming device includes: a housing including a radial direction and a second central axis; an objective lens unit located at one end of the housing; and an eyepiece unit located at the other end of the housing relative to the objective lens unit. One end; an upright unit disposed between the objective lens unit and the eyepiece unit; an adjustment unit movably disposed on the housing and abutting against the upright unit along the radial direction to adjust the Upright unit; a light emitting unit, fixed on the upright unit, including a light source to emit a light beam that is reflected by an object; a light receiving unit, fixed on the upright unit, including a light The sensor receives the light beam reflected by the object; wherein the distance between any point on the cross section of the outer surface of the housing and the second central axis is almost equal. The aiming device as described in Item 1 of the patent application, wherein: the housing further includes a first clamping part and a second clamping part, which are arranged on both sides of the adjustment unit where the housing is installed; The first clamping part and the second clamping part are both cylindrical, and the ratio of the length of the first clamping part to the length of the second clamping part is 0.5~2; the cross section of the inner surface of the housing The distance between any point and the second central axis is almost equal. The aiming device as described in item 1 of the patent application, wherein: the housing further includes a first clamping part; the upright unit includes a first central axis; the light emitting unit further includes a first end face facing the The objective lens unit is on the first end face and The farthest point of the first central axis is a first reference point; the light receiving unit further includes a second end face facing the objective lens unit, the second end face includes an outer edge, and the midpoint of the outer edge is a second Reference point; the aiming device satisfies at least one of the following conditional expressions: 6≦D5/g3≦13; 8≦D6/g2≦14; where D5 is the distance from the second reference point to the first central axis, and g3 is The minimum distance between the light receiving unit and the first clamping part, D6 is the distance from the first reference point to the first central axis, and g2 is the minimum distance between the light emitting unit and the first clamping part. The aiming device as described in item 1 or 2 of the patent application, wherein: the housing further includes a first clamping part; the upright unit includes a first central axis; and the light emitting unit further includes a first One end face faces the objective lens unit, and the point farthest from the first central axis on the first end face is a first reference point; the light receiving unit further includes a second end face facing the objective lens unit, and the second end face includes An outer edge, the midpoint of the outer edge is a second reference point; the first clamping part is cylindrical and has an inner diameter and an outer diameter; the aiming device satisfies at least one of the following conditional expressions: 4% ≦｜(D5-D6)/d1｜≦6% 4%≦｜(D5-D6)/d2｜≦6% where D5 is the distance from the second reference point to the first central axis, and D6 is the first The distance from the reference point to the first central axis, d1 is the inner diameter of the first clamping part, and d2 is the outer diameter of the first clamping part. The aiming device as described in item 1 of the patent application scope, wherein: The upright unit includes a first lens and a second lens, the first lens is closer to the objective lens unit than the second lens; the first lens includes a first side facing the eyepiece unit, and A second side faces the objective lens unit; the second lens includes a third side facing the eyepiece unit and a fourth side facing the objective lens unit; the light emitting unit includes a first end face facing the objective lens unit; the light The receiving unit includes a second end face facing the objective lens unit; the aiming device satisfies the conditional expression 0.8≦|(D1-D2)/(D3-D4)|≦3, where D1 is the distance between the first end face and the third side surface , D2 is the distance between the second end surface and the third side surface, D3 is the distance between the first side surface and the third side surface, and D4 is the distance between the second side surface and the third side surface. The aiming device as described in item 1 of the patent application, wherein: the upright unit includes a first central axis, a first lens and a second lens, and the first lens is more precise than the second lens. Close to the objective lens unit; the first lens includes a first side facing the eyepiece unit and a second side facing the objective lens unit; the second lens includes a third side facing the eyepiece unit and a fourth side Towards the objective lens unit; the light emitting unit includes a first end surface facing the objective lens unit; the light receiving unit includes a second end surface facing the objective lens unit; the first central axis intersects with the second side surface at a first intersection point, And intersects the third side surface at a second intersection point; the point furthest from the first central axis on the first end surface is a first reference point; The second end surface includes an outer edge and an inner edge. The outer edge is farther from the upright unit than the inner edge. The midpoint of the outer edge is a second reference point; the aiming device satisfies the conditional expression 0.2≦| (A1-A2)/(A3-A4)｜≦0.6, where A1 is the angle between the line connecting the second reference point and the second intersection point and the first central axis, and A2 is the angle between the first reference point and the second intersection point. The angle between the line connecting the second intersection point and the first central axis, A3 is the angle between the line connecting the second reference point and the first intersection point and the first central axis, A4 is the first reference The angle between the line connecting the point and the first intersection point and the first central axis. The aiming device as described in item 1 of the patent application, wherein: the upright unit includes a first lens, the first lens is closer to the objective lens unit than the light emitting unit, and the housing includes a first clip The first holding part is cylindrical and has an inner diameter and an outer diameter. The aiming device satisfies at least one of the following conditional expressions: 3%≦g1/d1≦6% 3%≦g1/d2≦ 6%, where g1 is the minimum distance between the first clamping part and the first clamping part, d1 is the inner diameter of the first clamping part, and d2 is the outer diameter of the first clamping part. The aiming device as described in item 1 of the patent application, wherein: the housing further includes a first clamping part, the first clamping part is cylindrical and has an inner diameter and an outer diameter. The aiming device At least one of the following conditional expressions must be met: 2%≦g2/d1≦5% 2%≦g2/d2≦5%, where g2 is the minimum distance between the light emitting unit and the first clamping part, and d1 is the first clamping part. The inner diameter of the holding part, d2 is the outer diameter of the first holding part. The aiming device as described in item 1 of the patent application, wherein: the housing further includes a first clamping part, the first clamping part is cylindrical and has an inner diameter; An outer diameter, the aiming device satisfies at least one of the following conditional expressions: 2%≦g3/d1≦6% 2%≦g3/d2≦5%, where g3 is the minimum distance between the light receiving unit and the first clamping part , d1 is the inner diameter of the first clamping part, and d2 is the outer diameter of the first clamping part. The aiming device as described in any one of items 1, 2, 5, 7, 8 and 9 of the patent application, wherein the upright unit has a first central axis. When viewed along the direction of the first central axis, The light source and the light sensor are coincident or have an included angle of 180° with respect to the first central axis.

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