Wide-angle day and night confocal lens

Abstract

The utility model discloses a wide-angle day and night confocal lens, which comprises a wide-angle lens barrel and a worm driving unit, a supporting ring is arranged in the middle of the wide-angle lens barrel, rotating shafts are evenly distributed on the rear side face of the supporting ring, the rear ends of the multiple rotating shafts are rotationally connected with light blocking pieces, a rotating ring is rotationally connected to the middle of the wide-angle lens barrel, and guiding shafts are evenly distributed on the front side face of the rotating ring. The guide shafts are in sliding connection with the guide long holes of the longitudinally adjacent light blocking pieces. According to the wide-angle day-and-night confocal lens, the adjustable aperture structure is arranged in the wide-angle lens barrel, so that the light incoming amount can be controlled, the adjustment precision is high, and when the wide-angle day-and-night confocal lens is used, the light incoming amount can be adjusted, and the light incoming amount can be adjusted to be uniform. The visual doorbell has good imaging quality no matter in the daytime or at night.

Description

Technical Field

[0001] The utility model relates to the technical field of visual doorbells, in particular to a wide-angle day and night confocal lens. Background Art

[0002] With the development of society, video doorbells have gradually become an important part of modern family security, playing an important role in improving home safety, convenience and practicality. Video doorbells cannot do without the use of wide-angle day and night confocal lenses. Wide-angle day and night confocal lenses, during the day, the wide-angle lens receives and focuses light on the photosensitive element to form a clear image. To ensure clarity at night, the lens generally has a larger aperture, which can ensure sufficient light input, but the aperture is generally not adjustable. When the amount of light input is large during the day, it is easy to cause overexposure of the picture. There are also some that add an adjustable aperture mechanism to control the amount of light input. It is generally transmitted through a gear structure, and the gear transmission locking ability is poor. When the door collides, the internal aperture structure is prone to shifting, affecting the adjustment accuracy of the aperture, and therefore also affecting the imaging quality of the video doorbell. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a wide-angle day and night confocal lens. An adjustable aperture structure is provided inside the wide-angle lens barrel to control the amount of light entering. The adjustment accuracy is high and the locking performance is good. It can ensure that when the wide-angle day and night confocal lens is in use, the video doorbell has good imaging quality regardless of day or night, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned object, the present utility model provides the following technical solutions: a wide-angle day and night confocal lens, comprising a wide-angle lens barrel and a worm drive unit;

[0005] Wide-angle lens barrel: A support ring is provided in the middle, and evenly distributed rotating shafts are provided on the rear side of the support ring. The rear ends of the multiple rotating shafts are rotatably connected to light shielding plates. The middle part of the wide-angle lens barrel is rotatably connected to a rotating ring, and evenly distributed guide shafts are provided on the front side of the rotating ring. The guide shafts are slidably connected to the guide long holes of the longitudinally adjacent light shielding plates;

[0006] Worm drive unit: used to drive the rotation of the rotating ring. An adjustable aperture structure is provided inside the wide-angle lens barrel to control the amount of light entering. The adjustment precision is high, which can ensure that the wide-angle day and night confocal lens has good imaging quality when used, whether it is day or night.

[0007] Furthermore, the worm drive unit includes a worm wheel, a worm and a motor. The worm wheel is arranged on the rear side of the rotating ring, the worm is rotatably connected to the middle part of the wide-angle lens barrel, the worm is meshed with the worm wheel, and a motor is provided on the outside of the wide-angle lens barrel. The output shaft of the motor is fixedly connected to the upper end of the worm, and the input end of the motor is electrically connected to the output end of the external controller to facilitate the control of the rotation of the light-blocking plate.

[0008] Furthermore, the worm drive unit also includes a retaining ring and a copper sleeve. The retaining ring is arranged at the upper and lower ends of the worm, and the copper sleeve is symmetrically arranged inside the through hole on the outer arc surface of the wide-angle lens barrel. The two copper sleeves are both rotatably connected to the worm, and the two retaining rings are located between the two copper sleeves to facilitate the positioning of the worm.

[0009] Furthermore, it also includes a reinforcing sheet, which is respectively arranged on the rear side of the light blocking sheet. The reinforcing sheet is provided with a hole of the same size and position as that on the light blocking sheet, so as to improve the structural strength of the light blocking sheet.

[0010] Furthermore, a positioning shell is provided at the rear end of the wide-angle lens barrel, and the positioning shell is arranged in cooperation with the rotating ring to facilitate the positioning of the rotating ring.

[0011] Furthermore, a fixing seat is provided on the rear end fixing sleeve of the outer arc surface of the wide-angle lens barrel, and fixing holes are provided at the four corners of the rear side surface of the fixing seat to facilitate the fixation of the lens.

[0012] Furthermore, positioning grooves are provided on the upper, lower, left and right surfaces of the fixing base, and the four positioning grooves pass through the front and back sides of the fixing base, thereby improving the installation accuracy of the lens.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] An adjustable aperture structure is installed inside the wide-angle lens barrel to control the amount of light entering. The aperture is adjusted by a worm gear structure driven by a stepping motor. The worm gear has a large reduction ratio and a self-locking function, which allows for precise adjustment of the aperture size. At the same time, the positioning accuracy is good, ensuring that the wide-angle day and night confocal lens has good imaging quality when used, whether it is day or night. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the wide-angle lens barrel of the utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A of the utility model;

[0018] Figure 4This is a structural diagram of the positioning shell of the utility model.

[0019] In the figure: 1 wide-angle lens barrel, 2 support ring, 3 rotating shaft, 4 light blocker, 5 rotating ring, 6 guide shaft, 7 worm drive unit, 71 worm gear, 72 worm, 73 motor, 74 blocking ring, 75 copper sleeve, 8 reinforcing plate, 9 positioning shell, 10 fixing seat, 11 fixing hole, 12 positioning groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4 , this embodiment provides a technical solution: a wide-angle day and night confocal lens, comprising a wide-angle lens barrel 1 and a worm drive unit 7;

[0022] Wide-angle lens barrel 1: A support ring 2 is provided in the middle thereof. The lens group inside the wide-angle lens barrel 1 corresponds to the position of the image sensor on the main board. When working, the external visible light and infrared light are refracted and directed to the image sensor through the lens group. Evenly distributed rotating shafts 3 are provided on the rear side surface of the support ring 2. The support ring 2 provides an installation position for the rotating shafts 3. The rear ends of multiple rotating shafts 3 are rotatably connected with light blocking plates 4. There are six rotating shafts 3. The rotating shafts 3 provide rotation support for the light blocking plates 4. The two adjacent light blocking plates 4 are overlapped and distributed front and back, and there will be no interference when moving. A rotating ring 5 is rotatably connected to the middle part of the wide-angle lens barrel 1. Evenly distributed guide shafts 6 are provided on the front side surface of the rotating ring 5. The guide shafts 6 are slidably connected to the guide long holes of the longitudinally adjacent light blocking plates 4. The rotating ring 5 drives the guide shaft 6 to rotate, and the guide shaft 6 and the guide long holes of the light blocking plates 4 slide relative to each other. The distances between the center lines of the guide long holes and the center point of the wide-angle lens barrel 1 are different, thereby controlling the rotation of the light blocking plates 4. When the light blocking plates 4 rotate toward the center line of the wide-angle lens barrel 1, The through hole formed in the center of the multiple light-blocking sheets 4 will become smaller, thereby controlling the amount of light passing through the wide-angle lens barrel 1. It also includes a reinforcing sheet 8, which is respectively arranged on the rear side of the light-blocking sheet 4. The reinforcing sheet 8 is a resin reinforcing sheet, which improves the structural strength of the light-blocking sheet 4. The reinforcing sheet 8 is provided with a hole of the same size and position as that on the light-blocking sheet 4, which reduces wear and improves the movement accuracy of the light-blocking sheet 4. A positioning shell 9 is provided at the rear end of the wide-angle lens barrel 1. The positioning shell 9 is arranged in conjunction with the rotating ring 5. The positioning shell 9 and the rotating ring 5 Contact and position it. The rear end fixing sleeve of the outer arc surface of the wide-angle lens barrel 1 is provided with a fixing seat 10. The fixing seat 10 is installed on the main board of the video doorbell. The four corners of the rear side of the fixing seat 10 are provided with fixing holes 11. Bolts are used to pass through the fixing holes 11 and connect to the main board to achieve the fixation of the fixing seat 10 and the wide-angle lens barrel 1. The fixing seat 10 is provided with positioning grooves 12 on the upper, lower, left and right surfaces. The four positioning grooves 12 run through the front and back sides of the fixing seat 10. When installing, the positioning grooves 12 correspond to the positioning protrusions on the main board;

[0023] The worm drive unit 7 is used to drive the rotation of the rotating ring 5. The worm drive unit 7 includes a worm wheel 71, a worm 72 and a motor 73. The worm wheel 71 is arranged on the rear side of the rotating ring 5. The worm 72 is rotatably connected to the middle part of the wide-angle lens barrel 1. The worm 72 is meshed with the worm wheel 71. A motor 73 is provided on the outside of the wide-angle lens barrel 1. The output shaft of the motor 73 is fixedly connected to the upper end of the worm 72. The input end of the motor 73 is electrically connected to the output end of the external controller. When the motor 73 is running, the electric The output shaft of the machine 73 drives the worm wheel 71 to rotate through the worm 72, and the worm wheel 71 drives the rotating ring 5 and the guide shaft 6 to rotate. The worm drive unit 7 also includes a retaining ring 74 and a copper sleeve 75. The retaining ring 74 is arranged at the upper and lower ends of the worm 72, and the copper sleeve 75 is symmetrically arranged inside the through hole of the outer arc surface of the wide-angle lens barrel 1. The two copper sleeves 75 are both rotatably connected to the worm 72. The two retaining rings 74 are located between the two copper sleeves 75. The copper sleeve 75 and the retaining ring 74 are in contact to provide positioning for the worm 72.

[0024] The working principle of the wide-angle day and night confocal lens provided by the present invention is as follows: when in use, the fixing base 10 is installed on the main board of the video doorbell, the positioning groove 12 is aligned with the positioning protrusion on the main board during installation, and a bolt is used to pass through the fixing hole 11 to connect with the main board to fix the fixing base 10 and the wide-angle lens barrel 1. The lens group inside the wide-angle lens barrel 1 corresponds to the position of the image sensor on the main board. When working, the external visible light and infrared light are refracted by the lens group and guided to the image sensor. When the external light intensity changes, the external control motor 73 is operated The output shaft of the motor 73 drives the worm gear 71 to rotate through the worm 72, and the worm gear 71 drives the rotating ring 5 and the guide shaft 6 to rotate. The guide shaft 6 slides relative to the guide long hole of the light blocking plate 4, and the rotation of the light blocking plate 4 can be controlled. When the light blocking plate 4 rotates toward the center line of the wide-angle lens barrel 1, the through hole formed in the center of the multiple light blocking plates 4 will become smaller, and the amount of light passing through the wide-angle lens barrel 1 can be controlled, thereby realizing the adjustment of the aperture size, which can avoid overexposure of the picture caused by strong light and improve the imaging quality of the video doorbell.

[0025] It is worth noting that the motor 73 disclosed in the above embodiment can be freely configured according to the actual application scenario. The motor 73 can be a NEMA 8 type micro stepper motor, and the external controller controls the operation of the motor 73 using methods commonly used in the prior art.

[0026] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wide-angle day and night confocal lens, characterized by: It comprises a wide-angle lens barrel (1) and a worm drive unit (7); A wide-angle lens barrel (1) is provided with a support ring (2) in the middle thereof, and evenly distributed rotating shafts (3) are provided on the rear side surface of the support ring (2), and the rear ends of the plurality of rotating shafts (3) are all rotatably connected to light blocking sheets (4). A rotating ring (5) is rotatably connected to the middle of the wide-angle lens barrel (1), and evenly distributed guide shafts (6) are provided on the front side surface of the rotating ring (5), and the guide shafts (6) are slidably connected to the guide long holes of the longitudinally adjacent light blocking sheets (4); Worm drive unit (7): used to drive the rotation of the rotating ring (5).

2. The wide-angle day / night confocal lens according to claim 1, characterized in that: The worm drive unit (7) comprises a worm wheel (71), a worm (72) and a motor (73); the worm wheel (71) is arranged on the rear side of the rotating ring (5); the worm (72) is rotatably connected to the middle part of the wide-angle lens barrel (1); the worm (72) is meshedly connected with the worm wheel (71); a motor (73) is provided outside the wide-angle lens barrel (1); an output shaft of the motor (73) is fixedly connected to the upper end of the worm (72); and an input end of the motor (73) is electrically connected to an output end of an external controller.

3. The wide-angle day / night confocal lens according to claim 2, characterized in that: The worm drive unit (7) further comprises a retaining ring (74) and a copper sleeve (75), wherein the retaining ring (74) is arranged at the upper and lower ends of the worm (72), and the copper sleeve (75) is symmetrically arranged inside the through hole of the outer arc surface of the wide-angle lens barrel (1), and the two copper sleeves (75) are both rotatably connected to the worm (72), and the two retaining rings (74) are located between the two copper sleeves (75).

4. The wide-angle day / night confocal lens according to claim 1, characterized in that: It also includes a reinforcing sheet (8), which is respectively arranged on the rear side surface of the light blocking sheet (4), and a hole of the same size and position as that on the light blocking sheet (4) is opened on the reinforcing sheet (8).

5. The wide-angle day and night confocal lens according to claim 1, characterized in that: A positioning shell (9) is provided at the rear end inside the wide-angle lens barrel (1), and the positioning shell (9) is arranged in cooperation with the rotating ring (5).

6. The wide-angle day and night confocal lens according to claim 1, characterized in that: A fixing seat (10) is provided on the rear end fixing sleeve of the outer arc surface of the wide-angle lens barrel (1), and fixing holes (11) are provided at the four corners of the rear side surface of the fixing seat (10).

7. The wide-angle day and night confocal lens according to claim 6, characterized in that: Positioning grooves (12) are provided on the upper, lower, left and right surfaces of the fixing seat (10), and the four positioning grooves (12) all pass through the front and back side surfaces of the fixing seat (10).

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