Aperture module with improved structure

Abstract

The utility model discloses an aperture module with an improved structure, which comprises a lower base, an upper cover plate, a stepping motor, a blade group and a movable ring, the lower base is provided with a base accommodating cavity, a base light through hole and an arc-shaped groove, the upper cover plate is buckled at the upper end part of the lower base, and the movable ring is rotationally arranged in the base accommodating cavity; an outer gear part is arranged on the edge of the outer end of the movable ring, the stepping motor is fixedly installed on the lower base, and a driving gear of a power output shaft of the stepping motor is meshed with the outer gear part. Each aperture blade in the blade group is driven by the movable ring; a vertical limiting flange is arranged on the edge of the outer end of the movable ring, a plurality of limiting protruding parts are arranged on the inner wall of the base containing cavity, and the movable ring is vertically limited between the limiting protruding parts and the bottom face of the base containing cavity. The movable ring is provided with an induction piece inserted into the arc-shaped groove, and an original point sensor is arranged in the arc-shaped groove. By means of the structural design, the LED lamp has the advantages of being novel in structural design, good in stability and reliability and accurate in light flux control.

Description

Technical Field

[0001] This utility model relates to the field of aperture module technology, and in particular to an aperture module with improved structure. Background Technology

[0002] An aperture is a device used to control the amount of light passing through a lens and entering the sensor inside the camera body. For a lens that has already been manufactured, it is impossible to change the diameter of the lens at will, but the amount of light passing through the lens can be controlled by adding a polygonal or circular aperture stop with a variable area inside the lens. This device is called an aperture.

[0003] Among them, the Chinese utility model patent with patent number ZL202320133625.X and patent name: "An Iridescent Aperture", specifically discloses the following technical solution: an iridescent aperture, including a shell, a motor, a dial, a transmission mechanism, and a blade assembly. The motor is mounted on the shell, the dial extends into the inner cavity of the shell and is rotatably mounted on the shell, and the motor is connected to the dial through the transmission mechanism to drive the dial to rotate; the dial is provided with multiple levers, the shell is provided with multiple fixed pins, the blade assembly has multiple blades, each blade is rotatably mounted on a fixed pin, and each blade is provided with a guide slot, and each lever extends into the guide slot of one blade; the transmission mechanism includes an output gear, the dial is provided with external teeth, and the output gear is mounted on the output shaft of the motor; a cover plate is fastened to the shell to restrict the dial as a whole between the cover plate and the shell.

[0004] In the process of adjusting the light transmission of the aforementioned iridescent aperture, after the motor is powered on, the gear transmission dial rotates, the rotation of the dial drives the rotation of the lever, and the rotation of the lever moves the blades, so that each blade rotates around the fixed pin on which it is installed, thereby changing the size of the aperture and adjusting the light transmission.

[0005] However, the aforementioned iridescent aperture still has the following drawbacks, specifically:

[0006] Defect 1: The dial is confined inside the housing by the cover plate. To prevent the dial from moving vertically, the dial must remain in contact with the cover plate. At this time, the flatness of the cover plate will affect the smoothness of the dial's rotation, that is, there is a problem of poor stability.

[0007] Defect 2: It cannot accurately control the size of the aperture, that is, it cannot accurately control the amount of light transmitted. Utility Model Content

[0008] The purpose of this invention is to provide an improved aperture module that addresses the shortcomings of existing technologies. This improved aperture module features a novel structural design, good stability and reliability, and accurate control of light transmission.

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0010] An improved aperture module includes a lower base, an upper cover, a stepper motor, a blade assembly, and a circular movable ring. The lower base has an upward-opening base receiving cavity inside, and the bottom surface of the base receiving cavity has a downward-opening base light-transmitting hole.

[0011] The upper cover plate is fastened to the upper end of the lower base. The upper cover plate has a light-transmitting hole that is vertically aligned with the light-transmitting hole of the base. The movable ring is rotatably installed in the base receiving cavity of the lower base.

[0012] An external gear is provided on the outer edge of the movable ring. The stepper motor is fixedly mounted on the lower base, and the power output shaft of the stepper motor is equipped with a drive gear that extends into the cavity of the base. The drive gear meshes with the external gear of the movable ring.

[0013] The blade assembly includes several aperture blades, each of which is driven by a movable ring.

[0014] The outer edge of the movable ring is provided with a vertical limiting flange that protrudes outward horizontally on the side of the external gear. The lower base is provided with several limiting protrusions arranged at intervals on the inner wall of the base receiving cavity and located on the upper side of the vertical limiting flange. The limiting protrusions and the lower base are an integral structure. The movable ring is vertically limited between the limiting protrusions of the lower base and the bottom surface of the base receiving cavity.

[0015] The bottom surface of the base cavity is also provided with an arc-shaped groove. The movable ring is provided with a sensing plate that is inserted downward into the arc-shaped groove. The arc-shaped groove is equipped with an origin sensor, which is a groove-type photoelectric sensor.

[0016] The blade group is located on the upper side of the movable ring. The upper surface of the lower base is provided with upward protruding blade pivots corresponding to each of the aperture blades. One end of each aperture blade is provided with a vertical through pivot hole. Each blade pivot is inserted into the pivot hole of the corresponding aperture blade.

[0017] Each aperture blade has a downward protruding rivet at its other end. The upper surface of the movable ring has a radially extending long groove corresponding to each aperture blade. The rivets of each aperture blade are inserted into the corresponding long grooves of the movable ring.

[0018] The upper cover plate has vertical through holes for each blade pivot, and the upper end of each blade pivot is inserted into the corresponding through hole.

[0019] The bottom surface of the base receiving cavity is provided with an upwardly protruding, annular contact flange that contacts the lower surface of the movable ring.

[0020] The movable ring is provided with a circumferential limiting flange that is circular in shape and inserted into the light-transmitting hole of the lower base.

[0021] The improved aperture module also includes an FPC circuit board, and the stepper motor and the origin sensor are electrically connected to the FPC circuit board.

[0022] Compared with the prior art, the present invention has the following beneficial effects, specifically:

[0023] 1. The movable ring is vertically limited within the base cavity by the cooperation of the limiting protrusion of the lower base and the vertical limiting flange of the movable ring. That is, the movable ring of this utility model is not vertically limited by the upper cover plate. Compared with the prior art, this utility model can effectively avoid the influence of the flatness of the upper cover plate on the movable ring, that is, this utility model has better stability and reliability.

[0024] 2. During the rotation of the movable ring, the sensing plate rotates synchronously with the movable ring; when the sensing plate rotates to the sensing position of the origin sensor, it indicates that the movable ring is at the origin position, and the aperture is in a closed state; when the aperture is open, the stepper motor can accurately control the size of the light aperture through step control to achieve accurate control of the amount of light transmitted.

[0025] 3. Therefore, the improved aperture module of this utility model has the advantages of novel structural design, good stability and reliability, and accurate control of light transmission. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 This is an exploded view of the present invention.

[0029] Figure 3 This is a partial cross-sectional schematic diagram of the present invention.

[0030] Figure 4 This is a partial cross-sectional view of another location of the present invention.

[0031] exist Figures 1 to 4 This includes:

[0032] 1-Lower base; 11-Base receiving cavity; 12-Base light-transmitting hole; 13-Limiting protrusion; 14-Arc-shaped groove; 15-Blade pivot; 16-Contact flange; 2-Upper cover plate; 21-Cover plate light-transmitting hole; 22-Clearing through hole; 3-Stepper motor; 4-Blade group; 41-Aperture blade; 411-Pivot hole; 412-Rivet; 5-Moving ring; 51-External gear; 52-Vertical limiting flange; 53-Sensing plate; 54-Long groove; 55-Circumferential limiting flange; 6-Drive gear; 7-Origin sensor; 8-FPC circuit board. Detailed Implementation

[0033] The present invention will now be described in conjunction with specific embodiments.

[0034] Example 1, as Figures 1 to 4 As shown, an improved aperture module includes a lower base 1, an upper cover plate 2, a stepper motor 3, a blade assembly 4, and a circular movable ring 5. The lower base 1 has an upward-opening base receiving cavity 11 inside, and the bottom surface of the base receiving cavity 11 has a downward-opening base light-transmitting hole 12.

[0035] Among them, such as Figures 1 to 4 As shown, the upper cover plate 2 is fastened to the upper end of the lower base 1. The upper cover plate 2 has a cover plate light-transmitting hole 21 that is vertically aligned with the light-transmitting hole 12 of the base. The movable ring 5 is rotatably installed in the base receiving cavity 11 of the lower base 1.

[0036] Furthermore, such as Figure 2 An external gear 51 is provided on the outer edge of the movable ring 5. The stepper motor 3 is fixedly installed on the lower base 1, and the power output shaft of the stepper motor 3 is equipped with a drive gear 6 that extends into the base cavity 11. The drive gear 6 meshes with the external gear 51 of the movable ring 5.

[0037] Furthermore, such as Figures 1 to 4 As shown, the blade group 4 includes several aperture blades 41, each of which is driven by a movable ring 5.

[0038] In addition, such as Figures 2 to 4 As shown, the outer edge of the movable ring 5 is provided with a horizontally protruding vertical limiting flange 52 on the side of the external gear part 51. The lower base 1 is provided with a number of spaced limiting protrusions 13 on the inner wall of the base receiving cavity 11, which are respectively located on the upper side of the vertical limiting flange 52. The limiting protrusions 13 and the lower base 1 are integral structures. The movable ring 5 is vertically limited between the limiting protrusions 13 of the lower base 1 and the bottom surface of the base receiving cavity 11.

[0039] In addition, such as Figure 2 and Figure 3As shown, the bottom surface of the base receiving cavity 11 is also provided with an arc-shaped groove 14. The movable ring 5 is provided with a sensing piece 53 inserted downward into the arc-shaped groove 14. The arc-shaped groove 14 is equipped with an origin sensor 7, which is a groove-type photoelectric sensor. It should be explained that the stepper motor 3 and the origin sensor 7 in this embodiment are electrically connected to the corresponding controllers.

[0040] In the process of adjusting the light transmission of the aperture module with the improved structure in this embodiment, the stepper motor 3 drives the movable ring 5 to rotate through the drive gear 6. The rotating movable ring 5 drives each blade aperture to rotate, so as to adjust the size of the aperture aperture and thus realize the adjustment of the light transmission.

[0041] It should be emphasized that in this embodiment, the movable ring 5 is vertically limited within the base cavity 11 by the cooperation of the limiting protrusion 13 of the lower base 1 and the vertical limiting flange 52 of the movable ring 5. That is, the movable ring 5 in this embodiment is not vertically limited by the upper cover plate 2. Compared with the prior art, this embodiment can effectively avoid the influence of the flatness of the upper cover plate 2 on the movable ring 5, that is, this embodiment has better stability and reliability.

[0042] It should be noted that the edge of the movable ring 5 has notches corresponding to the limiting protrusions 13 of the lower base 1. When the movable ring 5 is installed in the base cavity 11, the notches of the movable ring 5 are first aligned with the corresponding limiting protrusions 13 so that the movable ring 5 falls below the limiting protrusions 13. After the movable ring 5 is in place, the movable ring 5 is rotated so that the notches of the movable ring 5 are offset from the limiting protrusions 13.

[0043] It should be further emphasized that during the rotation of the movable ring 5, the sensing plate 53 rotates synchronously with the movable ring 5; when the sensing plate 53 rotates to the sensing position of the origin sensor 7, it indicates that the movable ring 5 is at the origin position, and the aperture is in a closed state; when the aperture is open, the stepper motor 3 can accurately control the size of the aperture through step control, so as to achieve accurate control of the amount of light transmitted.

[0044] In summary, the improved aperture module of this embodiment has the advantages of novel structural design, good stability and reliability, and accurate control of light transmission through the above structural design.

[0045] Example 2, as Figures 2 to 4 As shown, the difference between this embodiment 2 and embodiment 1 is that: the blade group 4 is located on the upper side of the movable ring 5, and the upper surface of the lower base 1 is provided with upward protruding blade pivots 15 corresponding to each aperture blade 41. One end of each aperture blade 41 is provided with a vertically penetrating pivot hole 411, and each blade pivot 15 is inserted into the pivot hole 411 of the corresponding aperture blade 41.

[0046] Each aperture blade 41 has a downward protruding rivet 412 at its other end. The upper surface of the movable ring 5 is provided with a radially extending long groove 54 corresponding to each aperture blade 41. The rivets 412 of each aperture blade 41 are inserted into the corresponding long groove 54 of the movable ring 5.

[0047] During the process of the stepper motor 3 driving the movable ring 5 to rotate through the drive gear 6, the rotating movable ring 5 drives the corresponding aperture blades 41 to rotate through each long slot 54, so that each aperture blade rotates around the corresponding pivot shaft as the rotation center, thereby changing the size of the aperture.

[0048] When the movable ring 5 drives each blade aperture to rotate, the rivet 412 of the blade aperture slides in the corresponding insertion slot 54.

[0049] Example 3, as Figures 1 to 4 As shown, the difference between this embodiment 3 and embodiment 2 is that: the upper cover plate 2 is provided with vertical through holes 22 for each blade pivot 15, and the upper end of each blade pivot 15 is inserted into the corresponding through hole 22.

[0050] Example 4, as Figures 2 to 4 As shown, the difference between this embodiment four and embodiment one is that the bottom surface of the base receiving cavity 11 is provided with an upward protruding contact flange 16 in the shape of an annulus, and the contact flange 16 contacts the lower surface of the movable ring 5.

[0051] The contact flange 16 located on the bottom surface of the base cavity 11 can effectively reduce the contact area between the movable ring 5 and the bottom surface of the base cavity 11, thereby reducing the frictional resistance when the movable ring 5 rotates and improving the smoothness of the movable ring 5 rotation.

[0052] Example 5, as Figure 3 and Figure 4 As shown, the difference between this fifth embodiment and the first embodiment is that the movable ring 5 is provided with a circumferential limiting flange 55 that is circular in shape and inserted into the light-transmitting hole 12 of the lower base 1.

[0053] It should be explained that in this embodiment five, the circumferential limiting flange 55 contacts the inner wall of the light-transmitting hole 12 of the base, and the axial limiting flange contacts the inner wall of the light-transmitting hole 12 of the base. This embodiment five can effectively limit the axial movement of the movable ring 5 to ensure the accuracy of the position of the movable ring 5.

[0054] Example 6, as Figure 1 and Figure 2 As shown, the difference between this embodiment six and embodiment one is that the improved aperture module also includes an FPC circuit board 8, and the stepper motor 3 and the origin sensor 7 are electrically connected to the FPC circuit board 8.

[0055] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An improved aperture module, comprising a lower base (1), an upper cover plate (2), a stepper motor (3), a blade assembly (4), and a circular ring (5). The lower base (1) has an upward-opening base receiving cavity (11) inside, and a downward-opening base light-transmitting hole (12) is provided on the bottom surface of the base receiving cavity (11). The upper cover plate (2) is fastened to the upper end of the lower base (1). The upper cover plate (2) has a cover plate light hole (21) that is vertically aligned with the light hole (12) of the base. The movable ring (5) is rotatably installed in the base receiving cavity (11) of the lower base (1). An external gear (51) is provided on the outer edge of the movable ring (5). The stepper motor (3) is fixedly installed on the lower base (1), and the power output shaft of the stepper motor (3) is equipped with a drive gear (6) that extends into the base cavity (11). The drive gear (6) meshes with the external gear (51) of the movable ring (5). The blade group (4) includes several aperture blades (41), each aperture blade (41) being driven by a movable ring (5); Its features are: The outer edge of the movable ring (5) is provided with a vertical limiting flange (52) that protrudes outward horizontally on the side of the external gear part (51). The lower base (1) is provided with a number of limiting protrusions (13) arranged at intervals on the inner wall of the base receiving cavity (11) and located on the upper side of the vertical limiting flange (52). The limiting protrusions (13) and the lower base (1) are an integral structure. The movable ring (5) is vertically limited between the limiting protrusions (13) of the lower base (1) and the bottom surface of the base receiving cavity (11). The bottom surface of the base cavity (11) is also provided with an arc-shaped groove (14). The movable ring (5) is provided with a sensor (53) inserted downward into the arc-shaped groove (14). The arc-shaped groove (14) is equipped with an origin sensor (7), which is a groove-type photoelectric sensor.

2. The improved aperture module according to claim 1, characterized in that: The blade group (4) is located on the upper side of the movable ring (5). The upper surface of the lower base (1) is provided with upward protruding blade pivots (15) corresponding to each of the aperture blades (41). One end of each aperture blade (41) is provided with a vertically penetrating pivot hole (411). Each blade pivot (15) is inserted into the pivot hole (411) of the corresponding aperture blade (41). Each aperture blade (41) has a downward protruding rivet (412) at its other end. The upper surface of the movable ring (5) has a radially extending long groove (54) corresponding to each aperture blade (41). The rivets (412) of each aperture blade (41) are inserted into the corresponding long groove (54) of the movable ring (5).

3. The improved aperture module according to claim 2, characterized in that: The upper cover plate (2) is provided with vertical through holes (22) for each blade pivot (15), and the upper end of each blade pivot (15) is inserted into the corresponding through hole (22).

4. The improved aperture module according to claim 1, characterized in that: The bottom surface of the base receiving cavity (11) is provided with an upward protruding contact flange (16) in the shape of a ring, and the contact flange (16) contacts the lower surface of the movable ring (5).

5. The improved aperture module according to claim 1, characterized in that: The movable ring (5) is provided with a circumferential limiting flange (55) that is circular in shape and inserted into the base light hole (12) of the lower base (1).

6. The improved aperture module according to claim 1, characterized in that: The improved aperture module also includes an FPC circuit board (8), and the stepper motor (3) and the origin sensor (7) are electrically connected to the FPC circuit board (8).

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