Automatic light adjusting structure of red dot sight

Abstract

The present application relates to a kind of red dot sight automatic light adjusting structure, including sight body, the upper portion of the sight body is provided with mirror frame, further including reflecting mirror, light sensor and processing unit;The reflecting mirror is set in mirror frame;The light sensor is set to mirror frame inboard bottom, and located in the area that reflecting mirror and mirror frame are attached;The reflecting mirror is used to conduct target light to the receiving end of light sensor, the light sensor is used to detect the brightness of target light, and brightness data is transmitted to processing unit;The processing unit is used to analyze brightness data, the processing unit is used to adjust the brightness of light source in sight body according to analysis result.The reflecting mirror of the present application can reflect target light to the receiving end of light sensor, so as to detect the brightness of target light, and adjust the brightness of light source (LED) according to the brightness of target light, to achieve the purpose of adaptive adjustment, provide the best visual experience.

Description

Technical Field

[0001] This invention relates to the field of aiming technology, specifically to an automatic light-adjusting structure for a red dot sight. Background Technology

[0002] A red dot sight is a non-magnified optical sight. Its main components are a reflector and an LED light. The reflector reflects the light emitted by the LED light, and the reflected light is always parallel to the target. When viewed by the human eye, the aiming point (usually a red or green dot) is formed on the reflector, allowing for accurate aiming.

[0003] The brightness adjustment methods for the aiming point include the following two:

[0004] 1. The sight body is equipped with adjustment buttons or knobs, which can be manually operated to adjust the brightness of the aiming point. However, this method requires manual operation and constant adjustment according to the ambient brightness. If the adjustment is not timely, it may cause unnecessary power consumption.

[0005] 2. Place a photosensitive device next to the LED or directly in front of the gun sight. The photosensitive device detects the ambient brightness and adjusts the brightness of the LED accordingly. Placing a photosensitive device directly in front of the gun sight requires milling out the mounting position on the surface and applying glue to fix and cover the lens. The installation process is complicated and costly. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an automatic dimming structure for a red dot sight, which addresses the above-mentioned shortcomings.

[0007] To solve the above technical problems, the present invention adopts the following technical solution:

[0008] An automatic dimming structure for a red dot sight includes a sight body, a frame on the upper part of the sight body, a reflective lens, a light sensor, and a processing unit.

[0009] The reflective lens is disposed within the lens frame;

[0010] The light sensor is located at the bottom inside the frame and in the area where the reflective lens fits against the frame.

[0011] The reflective lens is used to transmit the target light to the receiving end of the photosensor, and the photosensor is used to detect the brightness of the target light and transmit the brightness data to the processing unit.

[0012] The processing unit is used to analyze brightness data, and the processing unit is used to adjust the brightness of the light source inside the sight body according to the analysis results.

[0013] Furthermore, the reflective lens includes a first reflector and a second reflector arranged sequentially from front to back, and the first reflector and the second reflector are connected by an adhesive layer.

[0014] Furthermore, the top of the first reflector is provided with a lens electroplating layer.

[0015] Furthermore, after the target light enters the first reflector, it is sequentially projected onto the rear surface of the first reflector, the upper surface of the first reflector, the front surface of the first reflector, and the receiving end of the photosensor.

[0016] Furthermore, the light sensor is embedded within the frame.

[0017] Furthermore, a receiving groove is provided on the inner bottom of the frame, and an insulating fixing seat is provided in the receiving groove, with the photosensor disposed in the insulating fixing seat.

[0018] Furthermore, the processing unit is located at the bottom of the sight body, and the sight body has a channel connecting the receiving slot and the processing unit. A signal line connecting the light sensor and the processing unit is provided in the channel.

[0019] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0020] The reflector of this invention can reflect target light to the receiving end of a photosensor, thereby detecting the brightness of the target light and adjusting the brightness of the light source (LED) according to the brightness of the target light to achieve adaptive adjustment, providing the best visual experience, avoiding the aiming point being too bright in dim environments or not being able to see the aiming point in bright environments; the automatic adjustment of the light source brightness can adjust the brightness level as needed, avoiding unnecessary energy waste;

[0021] The photosensitive sensor of this invention is located inside the frame and is attached to the lower surface of the reflective lens. On the one hand, it simplifies the installation process and reduces the cost. On the other hand, it reduces the influence of external factors on the photosensitive sensor, such as rain and dust, and improves the stability of the dimming structure. Moreover, being located inside the frame, it is not easily blocked by external objects, ensuring stable reading of the photosensitive sensor.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is an exploded view of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 3 This is a bottom view of the present invention;

[0026] Figure 4 Optical path diagram for the operation of a photosensor;

[0027] Figure 5 This is a diagram of the LED reflection light path.

[0028] Figure 6 This is a schematic diagram of the connection of the present invention;

[0029] Figure 7 This is a circuit diagram for an LED driver.

[0030] Figure 8 This is a circuit diagram for an MCU (Microcontroller Unit).

[0031] Figure 9 This is a circuit diagram for an ambient light sensor.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Sight body; 11. Frame; 12. Receiving slot; 2. Reflecting lens; 21. First reflecting mirror; 22. Second reflecting mirror; 23. Adhesive layer; 24. Electroplated lens layer; 3. Light sensor; 31. Insulating mounting base; 4. Processing unit. Detailed Implementation

[0034] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0035] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise" and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, an automatic dimming structure for a red dot sight includes a sight body 1, a frame 11 on the upper part of the sight body 1, a reflective lens 2, a light sensor 3, and a processing unit 4.

[0037] The reflective lens 2 is disposed within the frame 11;

[0038] The light sensor 3 is located at the bottom inner side of the frame 11 and in the area where the reflective lens 2 is attached to the frame 11;

[0039] The reflective lens 2 is used to transmit the target light to the receiving end of the photosensor 3, and the photosensor 3 is used to detect the brightness of the target light and transmit the brightness data to the processing unit 4;

[0040] The processing unit 4 is used to analyze brightness data, and the processing unit 4 is used to adjust the brightness of the light source inside the sight body 1 according to the analysis results.

[0041] Specifically, such as Figure 6 As shown, the processing unit 4 includes an MCU and an LED driving circuit. The photosensor 3 is electrically connected to the MCU, the MCU is electrically connected to the LED through the LED driving circuit, and the power supply is electrically connected to the MCU. The specific circuit structure diagram is shown below. Figure 7 , Figure 8 and Figure 9 As shown, where:

[0042] The light sensor 3 has an ambient light sensor circuit, which is mainly used to transmit the brightness data of the target light to the MCU. In this embodiment of the invention, the ambient light sensor circuit includes a chip U2, resistors R20, R21, R22 and capacitor C1. Pin 1 of chip U2 is connected to one end of capacitor C1 and is connected to the power supply VCC. Pins 2, 3 and 7 of chip U2 are connected to the other end of capacitor C1 and grounded. Pin 4 of chip U2 is connected to one end of resistor R20. Pin 5 of chip U2 is connected to one end of resistor R21. Pin 6 of chip U2 is connected to one end of resistor R22. The other ends of resistors R20, R21 and R22 are connected to the power supply VCC.

[0043] The LED driver circuit controls the current flowing through the LED beads to change the LED's brightness, and simultaneously matches the voltage and current of the LED to ensure its normal operation. In this embodiment of the invention, the LED driver circuit includes diodes D1, D2, D3, D4, D7, and D10; resistors R1, R2, R4, R5, R10, R11, R12, and R16; capacitors C2, C3, C4, and C5; and LED1 and LED2. The cathode of diode D7 is connected to one end of resistor R1, the cathode of diode D1 is connected to one end of resistor R2, and the cathode of diode D2 is connected to one end of resistor R12. The other ends of resistors R1, R2, and R12 are connected to one end of capacitor C2 and then to one end of resistor R10. The other end of capacitor C2 is grounded. The other end of resistor R10 is connected to one end of capacitor C4 and then to the anode of LED2. The other end of capacitor C4 is grounded, and the cathode of LED2 is grounded. The cathode of diode D10... The negative terminal of diode D4 is connected to one end of resistor R4. The negative terminal of diode D4 is connected to one end of resistor R5. The negative terminal of diode D3 is connected to one end of resistor R11. The other ends of resistors R4, R5, and R11 are connected to one end of capacitor C3 and then to one end of resistor R16. The other end of capacitor C3 is grounded. The other end of resistor R16 is connected to one end of capacitor C5 and then to the positive terminal of LED1. The other end of capacitor C5 is grounded. The negative terminal of LED1 is connected to the negative terminal of diode LED2 and then grounded.

[0044] The MCU chip U1 uses the PI C16LF1829-I / ML chip, which features low power consumption and high performance, meeting the functional requirements of processing unit 4. Pin 1 of chip U1 is the MCLR pin, providing an external reset function and also serving as a programming and debugging input. Pin 2 of chip U1 is connected to the anode of diode D3; pin 4 of chip U1 is connected to the anode of diode D2; pin 5 of chip U1 is connected to the anode of diode D10; pin 7 of chip U1 is connected to pin 5 of chip U2; pin 8 of chip U1 is connected to pin 4 of chip U2; pin 10 of chip U1 is connected to pin 6 of chip U2; pin 12 of chip U1 is connected to the anode of diode D4; and pin 13 of chip U1 is used as… The power control input pin is connected to the positive terminal of diode D1 via pin 14 of chip U1. Pins 15 and 16 of chip U1 serve as clock pins for serial communication and in-circuit programming of the microcontroller. Pin 17 of chip U1 is connected to one end of capacitor C1 and grounded. The other end of capacitor C1 is connected to pin 18 of chip U1 and the negative terminal of diode D6, and then connected to the power supply VCC. The positive terminal of diode D6 is connected to the positive terminal of the 1632 button battery (i.e., the power supply), and the negative terminal of the 1632 button battery is grounded. Pin 19 of chip U1 is connected to the positive terminal of diode D7.

[0045] When the light sensor 3 receives the target light, it transmits the brightness data of the target light to the MCU (i.e., processing unit 4). The MCU adjusts the brightness of the LED according to the brightness data, specifically by adjusting the brightness of the LED through the LED driving circuit. Generally speaking, the brightness of the LED is positively correlated with the brightness of the target light.

[0046] Using the above technical solution, the light source can automatically adjust its brightness level according to changes in ambient light to provide the best visual experience. In dimly lit environments, the brightness will decrease to reduce the power consumption of the light source; while in bright environments, the brightness will increase to increase the visibility and clarity of the aiming point.

[0047] Example 1:

[0048] Example 1 is an improvement on the structure of the reflective lens 2.

[0049] like Figure 2 As shown, the reflecting lens 2 includes a first reflecting mirror 21 and a second reflecting mirror 22, which are arranged from front to back (i.e., from the target to the human eye). Figure 2 The first reflector 21 and the second reflector 22 are arranged sequentially from left to right, and are bonded and fixed by adhesive layer 23. The light sensor 3 is located at the bottom inside the frame 11 and is embedded in the sight body 1. The receiving end of the light sensor 3 is located on the lower surface of the first reflector 21.

[0050] The dual-mirror design ensures that the reflected light from the target beam travels entirely within the first mirror 21, while the reflected light from the LED travels within the second mirror 22, thus preventing the two light paths from interfering with each other.

[0051] like Figure 4 As shown, when the target light enters the first reflector 21, it is refracted once and then reaches the rear surface of the first reflector 21. After reflection, it reaches the upper surface of the first reflector 21. After further reflection, it reaches the front surface of the first reflector 21. At this time, the incident angle is greater than the critical angle. The light is completely reflected to the lower surface of the first reflector 21, that is, it enters the receiving end of the photosensor 3.

[0052] The reflection of the target light rays from the rear surface of the first reflecting mirror 21 includes:

[0053] (1) Of the target light rays that enter the first reflecting mirror 21, part of the target light rays are reflected to the upper surface of the first reflecting mirror 21, and the other part of the target light rays are refracted into the second reflecting mirror 22;

[0054] (2) Among the target rays that enter the first reflector 21, the target rays located at the upper part of the first reflector 21 are totally reflected to the upper surface of the first reflector 21; the target rays located at the middle and lower parts of the first reflector 21 are similar to those in (1), and as the position of the target rays moves down, the ratio of reflection and refraction gradually decreases.

[0055] like Figure 5 The diagram shown is a schematic of the reflected light path of the LED light source.

[0056] Preferably, the upper surfaces of the first reflector 21 and the second reflector 22 are electroplated, that is, the top of the first reflector 21 and the second reflector 22 has a lens electroplating layer 24 to increase the reflection efficiency of light at the top of the lens.

[0057] Example 2:

[0058] Example 2 is an improvement on the mounting structure of the light sensor 3.

[0059] The light sensor 3 is embedded in the sight body 1 (i.e., the inner bottom of the frame 11). The inner bottom of the frame 11 has a receiving groove 12, and an insulating fixing seat 31 is provided in the receiving groove 12. The light sensor 3 is located in the insulating fixing seat 31.

[0060] Using the above technical solution, the photosensitive sensor 3 is installed in the receiving groove 12 through the insulating fixing base 31. When assembling the reflective lens 2, the photosensitive sensor 3 and the reflective lens 2 are installed together with glue, eliminating unnecessary installation steps and saving costs.

[0061] like Figure 3As shown, preferably, the processing unit 4 is located at the bottom of the sight body 1. The sight body 1 has a channel connecting the receiving groove 12 and the processing unit 4. A signal line connecting the light sensor 3 and the processing unit 4 is provided in the channel.

[0062] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A red dot sight automatic light adjusting structure, comprising a sight body (1), an upper part of the sight body (1) is provided with a mirror frame (11), characterized in that, It also includes a reflective lens (2), a light sensor (3), and a processing unit (4); The reflective lens (2) is disposed within the frame (11); The light sensor (3) is located at the bottom inside the frame (11) and in the area where the reflective lens (2) and the frame (11) are in contact; The reflective lens (2) is used to transmit the target light to the receiving end of the photosensitive sensor (3), and the photosensitive sensor (3) is used to detect the brightness of the target light and transmit the brightness data to the processing unit (4). The processing unit (4) is used to analyze brightness data, and the processing unit (4) is used to adjust the brightness of the light source inside the sight body (1) according to the analysis results; The reflective lens (2) includes a first reflective mirror (21) and a second reflective mirror (22) arranged sequentially from front to back; The target light beam enters the first reflector (21) and then sequentially hits the rear surface of the first reflector (21), the upper surface of the first reflector (21), the front surface of the first reflector (21), and the receiving end of the light sensor (3); the receiving end of the light sensor (3) is located on the lower surface of the first reflector (21); The light sensor (3) is embedded in the frame (11); The inner bottom of the frame (11) is provided with a receiving groove (12), and an insulating fixing seat (31) is provided in the receiving groove (12). The light sensor (3) is located in the insulating fixing seat (31).

2. The automatic dimming structure for the red dot sight according to claim 1, characterized in that, The first reflector (21) and the second reflector (22) are connected by an adhesive layer (23).

3. The automatic dimming structure for the red dot sight according to claim 2, characterized in that, The top of the first reflector (21) is provided with a lens electroplating layer (24).

4. The automatic dimming structure for the red dot sight according to claim 1, characterized in that, The processing unit (4) is located at the bottom of the sight body (1). The sight body (1) has a channel connecting the receiving slot (12) and the processing unit (4). The channel is provided with a signal line connecting the light sensor (3) and the processing unit (4).

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