Aperture drive structure and P-IRIS variable aperture

Abstract

The present invention discloses an aperture drive structure and a P‑IRIS variable aperture, wherein the aperture drive structure comprises a fixed housing, wherein movable blades are mounted on the fixed housing, wherein a driving motor and a driving gear are mounted on the fixed housing, wherein a power output shaft of the driving motor is mounted with a motor output gear, wherein the motor output gear meshes with the driving gear; wherein a driving boss is arranged on the driving gear, wherein the driving boss is inserted into a blade driving hole of the movable blade; wherein the aperture drive structure has a novel design, a simple structure, convenient and fast installation, and a low manufacturing cost. The P‑IRIS variable aperture comprises the aperture drive structure, a magnet bracket, and a PCB board, wherein a Hall sensor is arranged on the PCB board, wherein the magnet bracket is fastened to the movable blade and is equipped with an induction magnet, wherein the induction magnet is close to the Hall sensor of the PCB board; wherein the P‑IRIS variable aperture has a novel design, high light transmission control precision, a simple structure, convenient and fast installation, and a low manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the field of aperture technology, and in particular to an aperture drive structure and a P-IRIS variable aperture. Background Art

[0002] The aperture is a device used to control the amount of light passing through the lens and entering the photosensitive surface inside the body. It has been widely used in various types of cameras, projectors, and infrared thermal imaging products.

[0003] Reference patent number: 201310160849.0, patent name: A Chinese invention patent of a single invisible aperture, the invention patent discloses a blade drive mechanism, the blade drive mechanism includes a coil frame and a coil winding wound on the coil frame, the coil frame is installed on the bottom plate, the core of the coil frame is formed with a receiving cavity, the receiving cavity can be relatively rotatably embedded with a magnet and a driving rod that moves synchronously with the magnet, the driving rod is provided with two driving arms extending outside the coil frame, and the two driving arms are respectively provided with a blade lever; the magnet and the driving rod form a crank structure, when working, the magnetic field of the coil winding acts on the magnet, the magnet drives the driving rod to rotate, and the rotating driving rod drives the blade to move through the blade lever.

[0004] It should be pointed out that the blade driving mechanism of the aperture has the defects of complex structure, inconvenient installation and high manufacturing cost. Summary of the invention

[0005] The object of the present invention is to provide an aperture driving structure to address the deficiencies of the prior art. The aperture driving structure has a novel design, a simple structure, is convenient and quick to install, and has a low manufacturing cost.

[0006] Another object of the present invention is to provide a P-IRIS variable aperture to address the deficiencies in the prior art. The P-IRIS variable aperture has a novel design, high light throughput control accuracy, a simple structure, convenient and quick installation, and low manufacturing cost.

[0007] To achieve the above object, the present invention is implemented through the following technical solutions.

[0008] An aperture driving structure includes a fixed shell, the fixed shell is provided with a shell light hole which completely penetrates the shell from top to bottom, and the fixed shell is equipped with a movable blade for adjusting the light transmission amount of the shell light hole;

[0009] The fixed housing is equipped with a driving motor and a driving gear located beside the driving motor. The power output shaft of the driving motor is equipped with a motor output gear, and the motor output gear is meshed with the driving gear.

[0010] The driving gear is provided with a driving boss deviating from the rotation center of the driving gear, and the movable blade is provided with a blade driving hole which is in an oblong shape and completely penetrates from top to bottom corresponding to the driving boss, and the driving boss is inserted into the blade driving hole of the movable blade.

[0011] Wherein, for the aperture driving structure, the fixed housing includes a fixed base and a fixed cover plate installed on the upper end of the fixed base, the movable blade is located between the fixed base and the fixed cover plate, the fixed base is provided with a base light-through hole that completely penetrates from top to bottom, the fixed cover plate is provided with a cover plate light-through hole that completely penetrates from top to bottom and is aligned with the base light-through hole, and the base light-through hole and the cover plate light-through hole constitute the housing light-through hole;

[0012] The driving motor and the driving gear are respectively installed on the fixed base, and the driving motor is screwed and fastened to the fixed base by a locking screw.

[0013] Wherein, for the aperture driving structure, the driving gear is provided with a limiting boss protruding laterally outward, and the fixed base is provided with a first limiting stop wall and a second limiting stop wall corresponding to the limiting boss;

[0014] When the movable blade is at the position of maximum light flux of the aperture, the limiting boss abuts against the first limiting blocking wall; when the movable blade is at the position of minimum light flux of the aperture, the limiting boss abuts against the second limiting blocking wall.

[0015] Among them, for the aperture driving structure, the driving gear, the driving boss, and the limiting boss are an integrated structure.

[0016] Wherein, for the aperture driving structure, the fixed base is provided with a gear set shaft protruding upward, the core of the driving gear is provided with a gear center hole completely penetrating from top to bottom, and the driving gear is set on the gear set shaft through the gear center hole;

[0017] The upper end surface of the gear set shaft is screwed with a graphite gasket through a locking screw, and the driving gear is vertically limited by the graphite gasket.

[0018] Wherein, for the aperture driving structure, the gear center hole of the driving gear is a stepped hole that is larger at the top and smaller at the bottom.

[0019] Among them, for the aperture driving structure, the fixed base is provided with a blade lower slide rail protruding upward, and the fixed cover is provided with a blade upper slide rail protruding downward. The fixed base contacts the movable blade through the blade lower slide rail, and the fixed cover contacts the movable blade through the blade upper slide rail.

[0020] Wherein, for the aperture driving structure, the movable blades are SUS304 blades.

[0021] A P-IRIS variable aperture, comprising the aperture drive structure described above;

[0022] The P-IRIS variable aperture also includes a magnet bracket, a PCB board fastened to the fixed housing, the PCB board is provided with a Hall sensor, and the magnet bracket is fastened to the movable blade;

[0023] The magnet bracket is equipped with an induction magnet, and the induction magnet is close to the Hall sensor of the PCB board.

[0024] Among them, for the P-IRIS variable aperture, the movable blade is bent to form a blade mounting portion, and the magnet bracket is screwed and fastened to the blade mounting portion by a locking screw.

[0025] The beneficial effects of the present invention are as follows: the aperture drive structure described in the present invention includes a fixed shell, the fixed shell is provided with a shell light hole that completely penetrates from top to bottom, the fixed shell is equipped with a movable blade for adjusting the light transmission of the shell light hole; the fixed shell is equipped with a drive motor and a drive gear located beside the drive motor, the power output shaft of the drive motor is equipped with a motor output gear, and the motor output gear is meshed with the drive gear; the drive gear is provided with a drive boss that deviates from the rotation center of the drive gear, and the movable blade is provided with a blade drive hole that is in an oblong shape and completely penetrates from top to bottom corresponding to the drive boss, and the drive boss is inserted into the blade drive hole of the movable blade. Through the above structural design, the aperture drive structure has a novel design, a simple structure, convenient and quick installation, and a low preparation cost.

[0026] Another beneficial effect of the present invention is: the P-IRIS variable aperture described in the present invention includes the above-mentioned aperture driving structure; the P-IRIS variable aperture also includes a magnet bracket, a PCB board fastened to the fixed housing, the PCB board is provided with a Hall sensor, and the magnet bracket is fastened to the movable blade; the magnet bracket is equipped with an induction magnet, and the induction magnet is close to the Hall sensor of the PCB board. Through the above-mentioned structural design, the P-IRIS variable aperture has a novel design, high light transmission control accuracy, simple structure, convenient and quick installation, and low preparation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below with the aid of the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 for Figure 1 Schematic diagram of the decomposition.

[0030] Figure 3 It is a structural schematic diagram of another viewing angle of the present invention.

[0031] Figure 4 for Figure 3 Schematic diagram of the decomposition.

[0032] Figure 5 It is a cross-sectional schematic diagram of the present invention.

[0033] Figure 6 This is a schematic diagram of the structure of the present invention when the fixed cover plate is removed.

[0034] Figure 7 This is a schematic diagram of the structure of the present invention when the fixed cover plate and the movable blades are removed.

[0035] exist Figures 1 to 7 Included are:

[0036] 1——Fixed shell 11——Fixed base

[0037] 111——Base light hole 112——First limit stop wall

[0038] 113——Second limiting retaining wall 114——Gear set shaft

[0039] 115——Lower lower rail of blade 12——Fixed cover

[0040] 121——Light hole on cover plate 122——Slide rail on blade

[0041] 2——Active blade 21——Blade drive hole

[0042] 22——blade mounting part 31——driving motor

[0043] 32——Motor output gear 4——Drive gear

[0044] 41——driving boss 42——limiting boss

[0045] 43——Gear center hole 5——Graphite gasket

[0046] 61——Magnetic bracket 62——Induction magnet

[0047] 7——PCB board. DETAILED DESCRIPTION

[0048] The present invention is described below in conjunction with specific implementation methods.

[0049] Embodiment 1, as Figures 1 to 7As shown, an aperture driving structure includes a fixed housing 1, the fixed housing 1 is provided with a housing light hole that completely penetrates from top to bottom, and the fixed housing 1 is equipped with a movable blade 2 for adjusting the light passing amount of the housing light hole. The movable blade 2 can be made of a metal sheet structure; preferably, the movable blade 2 is a SUS304 blade. The movable blade 2 made of SUS304 material has the characteristics of high temperature resistance and light penetration resistance, so as to be effectively applicable to complex environments such as infrared thermal imaging and projectors.

[0050] Furthermore, the fixed housing 1 is equipped with a driving motor 31 and a driving gear 4 located beside the driving motor 31. The power output shaft of the driving motor 31 is equipped with a motor output gear 32, and the motor output gear 32 is meshed with the driving gear 4. Figure 2 , Figure 4 as well as Figure 7 As shown, the driving gear 4 of the first embodiment can be designed as a half-circle tooth structure, which can reduce the molding difficulty, mold difficulty and preparation cost of the driving gear 4.

[0051] Furthermore, the driving gear 4 is provided with a driving boss 41 which deviates from the rotation center of the driving gear 4, and the movable blade 2 is provided with a blade driving hole 21 which is in an oblong shape and completely penetrates from top to bottom corresponding to the driving boss 41, and the driving boss 41 is inserted into the blade driving hole 21 of the movable blade 2. For the driving boss 41 of the first embodiment, it can adopt an integrated structure design or a split structure design; for the driving boss 41 of the integrated structure design, the driving boss 41 and the driving gear 4 are an integrated structure; for the driving boss 41 of the split structure design, the driving boss 41 can be installed on the driving gear 4 by screw connection or buckle connection.

[0052] In addition, if Figures 1 to 7 As shown, the fixed shell 1 includes a fixed base 11, a fixed cover plate 12 installed on the upper end of the fixed base 11, the movable blade 2 is located between the fixed base 11 and the fixed cover plate 12, the fixed base 11 is provided with a base light-through hole 111 that completely penetrates from top to bottom, the fixed cover plate 12 is provided with a cover plate light-through hole 121 that completely penetrates from top to bottom and is aligned with the base light-through hole 111, the base light-through hole 111 and the cover plate light-through hole 121 constitute the shell light-through hole; the driving motor 31 and the driving gear 4 are respectively installed on the fixed base 11, and the driving motor 31 is screwed and fastened to the fixed base 11 by locking screws.

[0053] It should be explained that the fixed cover plate 12 of the present invention can be fastened to the upper end of the fixed base 11 by means of locking screws; of course, the above-mentioned assembly method of the fixed cover plate 12 and the fixed base 11 does not constitute a limitation to the present invention, that is, the fixed cover plate 12 of the present invention can also be installed on the upper end of the fixed base 11 by snap-fitting.

[0054] In the process of the movable blade 2 of the first embodiment moving between the fixed base 11 and the fixed cover plate 12 and realizing the adjustment of the light transmittance of the light hole of the shell, the driving motor 31 drives the driving gear 4 to rotate through the motor output gear 32, and the rotating driving gear 4 drives the driving boss 41 to rotate about the rotation center of the driving gear 4. Since the driving boss 41 is inserted into the blade driving hole 21 of the movable blade 2, under the driving action of the driving boss 41, the movable blade 2 moves relative to the fixed base 11 and the fixed cover plate 12.

[0055] It should be emphasized that the aperture driving structure of the first embodiment directly drives the movable blade 2 to move by driving the gear 4. Compared with the crank structure in the prior art, the structure is simpler and the manufacturing cost is correspondingly lower.

[0056] In addition, during the assembly of the aperture drive structure of the first embodiment, it is only necessary to ensure that the motor output gear 32 is meshed with the drive gear 4 and that the drive boss 41 is inserted into the blade drive hole 21 of the movable blade 2, and the installation is very convenient and quick.

[0057] In summary, it can be seen that through the above structural design, the aperture driving structure of the first embodiment has the advantages of novel design, simple structure, convenient and quick installation, and low preparation cost.

[0058] Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that: Figure 2 , Figure 4 as well as Figure 7 As shown, the driving gear 4 is provided with a limit boss 42 protruding laterally outward, and the fixed base 11 is provided with a first limit stop wall 112 and a second limit stop wall 113 corresponding to the limit boss 42; when the movable blade 2 is in the aperture maximum light transmission position, the limit boss 42 abuts against the first limit stop wall 112; when the movable blade 2 is in the aperture minimum light transmission position, the limit boss 42 abuts against the second limit stop wall 113.

[0059] Among them, for the limiting boss 42 of the second embodiment of the present invention, it can adopt an integrated structural design or a split structural design; for the limiting boss 42 with an integrated structural design, the limiting boss 42 and the driving gear 4 are an integrated structure; for the limiting boss 42 with a split structural design, the limiting boss 42 is installed on the driving gear 4 by means of screw connection, snap connection, etc.

[0060] During the operation of the aperture driving structure of the second embodiment, the limiting boss 42 of the driving gear 4 is limited by the first limiting retaining wall 112 and the second limiting retaining wall 113. This structural design directly mechanically limits the driving gear 4, and the limiting process is higher.

[0061] Embodiment 3: The difference between Embodiment 3 and Embodiment 1 is that: Figure 2 , Figure 4 , Figure 5 as well as Figure 7 As shown, the fixed base 11 is provided with a gear sleeve shaft 114 protruding upward, and the core of the driving gear 4 is provided with a gear center hole 43 that completely penetrates from top to bottom. The driving gear 4 is sleeved on the gear sleeve shaft 114 through the gear center hole 43 .

[0062] The upper end surface of the gear sleeve shaft 114 is screwed with a graphite gasket 5 via a locking screw, and the driving gear 4 is vertically limited by the graphite gasket 5 .

[0063] In the process of installing the driving gear 4 in the aperture driving structure of the third embodiment, the gear center hole 43 of the driving gear 4 is aligned and fitted on the gear fitting shaft 114 of the fixed base 11, and then the graphite gasket 5 is fastened to the upper end surface of the gear fitting shaft 114 by means of a locking screw, so as to vertically limit the driving gear 4 by means of the graphite gasket 5. The above-mentioned installation method of the driving gear 4 has the advantages of convenient assembly and low cost.

[0064] In addition, the graphite gasket 5 of the third embodiment is used to vertically limit the driving gear 4 on the one hand, and can achieve self-lubrication on the other hand, so that the driving gear 4 rotates more smoothly.

[0065] In addition, the gear center hole 43 of the driving gear 4 is a stepped hole that is larger at the top and smaller at the bottom; by designing the gear center hole 43 of the driving gear 4 as a stepped hole structure, the aperture driving structure of the third embodiment can effectively reduce the difficulty of processing the gear center hole 43 of the driving gear 4, thereby reducing costs.

[0066] Embodiment 4: The difference between this embodiment 4 and embodiment 1 is that: Figure 2 , Figure 4 , Figure 6 as well as Figure 7 As shown, the fixed base 11 is provided with a blade lower slide rail 115 protruding upward, and the fixed cover plate 12 is provided with a blade upper slide rail 122 protruding downward. The fixed base 11 contacts the movable blade 2 through the blade lower slide rail 115, and the fixed cover plate 12 contacts the movable blade 2 through the blade upper slide rail 122.

[0067] During the movement of the movable blade 2 of the aperture driving structure of the fourth embodiment between the fixed base 11 and the fixed cover plate 12, the fixed base 11 contacts the movable blade 2 through the blade lower slide rail 115, and the fixed cover plate 12 contacts the movable blade 2 through the blade upper slide rail 122. The above-mentioned contact structure design can effectively reduce the contact area between the movable blade 2 and the fixed base 11 and the fixed cover plate 12, so that the movable blade 2 can move more smoothly.

[0068] Embodiment 5, a P-IRIS variable aperture, comprising the aperture driving structure of any one of the above embodiments 1 to 4.

[0069] In addition, the P-IRIS variable aperture also includes a magnet bracket 61 and a PCB board 7 fastened to the fixed housing 1, the PCB board 7 is provided with a Hall sensor, and the magnet bracket 61 is fastened to the movable blade 2; the magnet bracket 61 is equipped with an induction magnet 62, and the induction magnet 62 is close to the Hall sensor of the PCB board 7.

[0070] It should be pointed out that if Figure 2 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the magnet bracket 61 of the fifth embodiment is installed on the movable blade 2 in the following manner, specifically: the movable blade 2 is bent to form a blade mounting portion 22, and the magnet bracket 61 is screwed and fastened to the blade mounting portion 22 by a locking screw. Of course, the installation method of the above-mentioned magnet bracket 61 does not constitute a limitation to the fifth embodiment.

[0071] During the operation of the P-IRIS variable aperture of the fifth embodiment, the driving motor 31 drives the driving gear 4 to rotate via the motor output gear 32, and the rotating driving gear 4 drives the driving boss 41 to rotate about the rotation center of the driving gear 4. Since the driving boss 41 is inserted into the blade driving hole 21 of the movable blade 2, under the driving action of the driving boss 41, the movable blade 2 moves relative to the fixed housing 1 to change the light transmittance of the housing light hole of the fixed housing 1.

[0072] In the process of the movable blade 2 moving relative to the fixed housing 1, the magnet bracket 61 moves synchronously with the movable blade 2, that is, the induction magnet 62 installed on the magnet bracket 61 also moves synchronously with the movable blade 2. In this process, the Hall sensor installed on the PCB board 7 will sense the change in the magnetic field strength of the induction magnet 62. The Hall sensor can feed back the received magnetic field strength signal to the controller of the projector and other equipment. The controller determines the distance value from the induction magnet 62 to the Hall sensor according to the magnetic field strength signal to determine the moving distance of the induction magnet 62, thereby realizing accurate measurement of the moving distance of the movable blade 2, so as to achieve the purpose of feedback of the moving position of the movable blade 2. When the actual position of the movable blade 2 deviates from the desired position, the controller can adjust the position of the movable blade 2 by controlling the forward and reverse rotation of the drive motor 31 to realize accurate control of the position of the movable blade 2, thereby realizing accurate control of the light transmission amount.

[0073] Therefore, the P-IRIS variable aperture of the fifth embodiment has the advantages of novel design, high light throughput control accuracy, simple structure, convenient and quick installation, and low manufacturing cost.

[0074] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. An aperture driving structure, comprising a fixed housing (1), the fixed housing (1) being provided with a housing light hole which completely penetrates the housing from top to bottom, and the fixed housing (1) being provided with a movable blade (2) for adjusting the light transmission amount of the housing light hole; Features: The fixed housing (1) is provided with a driving motor (31) and a driving gear (4) located beside the driving motor (31); a power output shaft of the driving motor (31) is provided with a motor output gear (32), and the motor output gear (32) is meshed with the driving gear (4); The driving gear (4) is provided with a driving boss (41) which is offset from the rotation center of the driving gear (4); the movable blade (2) is provided with a blade driving hole (21) which is in an oblong shape and completely penetrates from top to bottom, corresponding to the driving boss (41); the driving boss (41) is inserted into the blade driving hole (21) of the movable blade (2).

2. The aperture driving structure according to claim 1, characterized in that: The fixed housing (1) comprises a fixed base (11) and a fixed cover plate (12) mounted on the upper end of the fixed base (11); the movable blade (2) is located between the fixed base (11) and the fixed cover plate (12); the fixed base (11) is provided with a base light-through hole (111) which completely penetrates the fixed base (111) vertically; the fixed cover plate (12) is provided with a cover plate light-through hole (121) which completely penetrates the fixed base (111) vertically and is aligned with the base light-through hole (111); the base light-through hole (111) and the cover plate light-through hole (121) constitute the housing light-through hole; The driving motor (31) and the driving gear (4) are respectively mounted on the fixed base (11), and the driving motor (31) is screwed and fastened to the fixed base (11) by means of a locking screw.

3. The aperture driving structure according to claim 2, characterized in that: The driving gear (4) is provided with a limiting boss (42) protruding laterally outward, and the fixed base (11) is provided with a first limiting retaining wall (112) and a second limiting retaining wall (113) corresponding to the limiting boss (42); When the movable blade (2) is at the aperture maximum light transmission position, the limiting boss (42) abuts against the first limiting stop wall (112); when the movable blade (2) is at the aperture minimum light transmission position, the limiting boss (42) abuts against the second limiting stop wall (113).

4. The aperture driving structure according to claim 3, characterized in that: The driving gear (4), the driving boss (41) and the limiting boss (42) are an integrated structure.

5. The aperture driving structure according to claim 2, characterized in that: The fixed base (11) is provided with a gear sleeve shaft (114) protruding upward, and the core of the driving gear (4) is provided with a gear center hole (43) that completely penetrates from top to bottom, and the driving gear (4) is sleeved on the gear sleeve shaft (114) through the gear center hole (43); A graphite gasket (5) is screwed and fastened to the upper end surface of the gear sleeve shaft (114) via a locking screw, and the driving gear (4) is vertically limited by the graphite gasket (5).

6. The aperture driving structure according to claim 5, characterized in that: The gear center hole (43) of the driving gear (4) is a stepped hole that is larger at the top and smaller at the bottom.

7. The aperture driving structure according to claim 2, characterized in that: The fixed base (11) is provided with a blade lower slide rail (115) protruding upward, and the fixed cover plate (12) is provided with a blade upper slide rail (122) protruding downward. The fixed base (11) contacts the movable blade (2) via the blade lower slide rail (115), and the fixed cover plate (12) contacts the movable blade (2) via the blade upper slide rail (122).

8. The aperture driving structure according to claim 1, characterized in that: The movable blade (2) is a SUS304 blade.

9. A P-IRIS variable aperture, characterized in that: Comprising the aperture driving structure according to any one of claims 1 to 7; The P-IRIS variable aperture further comprises a magnet bracket (61), a PCB board (7) fastened to the fixed housing (1), the PCB board (7) being provided with a Hall sensor, and the magnet bracket (61) being fastened to the movable blade (2); The magnet bracket (61) is provided with an induction magnet (62), and the induction magnet (62) is close to the Hall sensor of the PCB board (7).

10. The P-IRIS variable aperture according to claim 9, characterized in that: The movable blade (2) is bent to form a blade mounting portion (22), and the magnet bracket (61) is screwed and fastened to the blade mounting portion (22) by means of a locking screw.

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