Multi-blade automatic aperture

Abstract

The invention discloses a multi-blade automatic aperture which comprises a fixed base and a fixed cover plate, a blade containing cavity and a driving cavity are formed between the fixed base and the fixed cover plate, a blade assembly is embedded in the blade containing cavity, and the fixed base is provided with a blade driving assembly extending into the driving cavity. The blade driving assembly comprises a reel, a coil winding and a magnet rocking handle assembly embedded in a rotor accommodating cavity in the reel, the magnet rocking handle assembly comprises a movable magnet and a movable rocking handle, and the movable rocking handle is provided with a driving swing arm; the blade assembly comprises a rotating piece and at least three movable blades, the rotating piece comprises a circular ring part and a driving part, and the driving swing arm is in driving connection with the driving part; each movable blade is provided with a pivoting hole and a long hole, the blade pivot of the fixed base is embedded into the pivoting hole of the movable blade, and the driving column of the circular ring part of the rotating piece is embedded into the long hole of the movable blade. By means of the structural design, the LED lamp has the advantages of being novel in structural design and high in light flux control precision.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic aperture, and in particular to a multi-blade automatic aperture. Background Art

[0002] The Chinese invention patent with the patent number ZL202023145302.8 and the patent name of "A New Type of Aperture Shutter Combination Structure" actually discloses an automatic aperture. Specifically, the new type of aperture shutter combination structure includes a fixed base, a fixed cover plate installed at the upper end of the fixed base. A blade accommodation cavity is formed between the fixed base and the fixed cover plate. A base light passing hole that penetrates completely up and down and communicates with the blade accommodation cavity is opened in the middle of the fixed base. A cover plate light passing hole that penetrates completely up and down and communicates with the blade accommodation cavity is opened in the middle of the fixed cover plate. The base light passing hole and the cover plate light passing hole are arranged in alignment; an upper moving blade that moves synchronously and reversely and a lower moving blade located below the upper moving blade are embedded in the blade accommodation cavity; a blade driving assembly is installed at the right end of the fixed base. The blade driving assembly includes a winding shaft installed at the right end of the fixed base and a wire winding wrapped around the outer periphery of the winding shaft. A rotor accommodation cavity is formed inside the winding shaft, and a magnet crank assembly is embedded in the rotor accommodation cavity; the magnet crank assembly includes a movable crank and a movable magnet. The movable crank includes a crank installation part installed in the rotor accommodation cavity of the winding shaft through a core shaft. The movable magnet is sleeved around the outer periphery of the crank installation part. A first driving swing arm and a second driving swing arm are arranged at the upper end of the crank installation part. The upper end of the first driving swing arm extends into the blade accommodation cavity and the upper end of the first driving swing arm is pivotally connected to the right end of the upper moving blade. The upper end of the second driving swing arm extends into the blade accommodation cavity and the upper end of the second driving swing arm is pivotally connected to the right end of the lower moving blade.

[0003] When the above new type of aperture shutter combination structure is used as an aperture, the magnetic field force generated after the wire winding is energized acts on the movable magnet. The movable magnet rotates under the action of the magnetic field force, and the movable magnet drives the movable crank to rotate synchronously. Furthermore, the first driving swing arm and the second driving swing arm of the movable crank swing. The swinging first driving swing arm pulls the upper moving blade, and the swinging second driving swing arm pulls the lower moving blade; the first driving swing arm and the second driving swing arm of the movable crank are arranged oppositely. The upper moving blade and the lower moving blade move left and right in the blade accommodation cavity under the driving action of the corresponding first driving swing arm and second driving swing arm, and the upper moving blade and the lower moving blade move synchronously and reversely.

[0004] It should be noted that for the above new type of aperture shutter combination structure, it still has the following defects, specifically:

[0005] Defect 1: The control and adjustment of the light transmission amount are achieved by the upper movable blade and the lower movable blade through translational movements. When the upper movable blade and the lower movable blade move closer to each other, the light transmission amount of the aperture becomes smaller; when the upper movable blade and the lower movable blade move away from each other, the light transmission amount of the aperture becomes larger. However, this translational double-blade structure has the defect of relatively low precision in controlling the light transmission amount.

[0006] Defect 2: The upper movable blade is driven by the first driving swing arm, and the lower movable blade is driven by the second driving mechanism. The first driving swing arm and the second driving swing arm move synchronously to ensure that the upper movable blade and the lower movable blade move in opposite directions synchronously. The structure of this blade driving assembly is complex. Summary of the Invention

[0007] The purpose of the present invention is to provide a multi-blade automatic aperture aiming at the deficiencies of the prior art. This multi-blade automatic aperture has a novel structural design and high precision in controlling the light transmission amount.

[0008] To achieve the above object, the present invention is realized through the following technical solutions.

[0009] A multi-blade automatic aperture includes a fixed base, a fixed cover plate installed at the upper end of the fixed base. A blade accommodation cavity and a driving cavity are formed between the fixed base and the fixed cover plate. The fixed base is provided with a base light passing hole vertically penetrating and communicating with the blade accommodation cavity, and the fixed cover plate is provided with a cover plate light passing hole vertically penetrating and aligned with the base light passing hole.

[0010] A blade assembly is embedded in the blade accommodation cavity. The fixed base is provided with a blade driving assembly extending into the driving cavity. The blade driving assembly includes a wire winding frame installed on the fixed base and a coil winding wound around the periphery of the wire winding frame. A rotor accommodation cavity is formed inside the wire winding frame, and a magnet crank assembly is embedded in the rotor accommodation cavity. The magnet crank assembly includes a movable magnet and a movable crank connected to the movable magnet and rotating synchronously with the movable magnet. The movable crank is provided with a driving swing arm extending outside the wire winding frame and extending into the driving cavity.

[0011] The blade assembly includes a rotating member rotatably installed on the fixed base and at least three movable blades located above the rotating member. The rotating member includes an annular portion surrounding the periphery of the base light passing hole, and a driving portion protruding outwardly is provided at the edge of the annular portion. The annular portion and the driving portion are of an integral structure. The driving swing arm of the blade driving assembly is drivingly connected to the driving portion of the rotating member.

[0012] Each movable blade is respectively provided with a vertically penetrating pivot hole and a long hole located beside the pivot hole; the fixed base is respectively provided with blade pivot shafts protruding from the bottom surface of the blade accommodating cavity corresponding to the pivot holes of each movable blade, and each blade pivot shaft is respectively inserted into the pivot hole of the corresponding movable blade; on the upper surface of the circular ring portion of the rotating member, driving columns protruding upward are respectively provided corresponding to each movable blade, and each driving column is respectively inserted into the long hole of the corresponding movable blade.

[0013] Wherein, the fixed base is provided with an annular groove on the bottom surface of the blade accommodating cavity that is adapted to the circular ring portion of the rotating member, and the circular ring portion of the rotating member is rotatably installed in the annular groove of the fixed base;

[0014] The fixed base is provided with an intermediate groove between the annular groove and the driving cavity, and the driving portion of the rotating member passes through the intermediate groove and extends into the driving cavity.

[0015] Wherein, the driving portion of the rotating member is provided with a vertically penetrating driving hole, and the driving swing arm extends into the driving hole of the driving portion.

[0016] Wherein, the blade pivot shaft and the fixed base are of an integral structure, and the driving column and the circular ring portion of the rotating member are of an integral structure.

[0017] Wherein, the wire winding frame includes a bottom frame and a top frame installed at the upper end of the bottom frame, and the rotor accommodating cavity is jointly surrounded by the bottom frame and the top frame;

[0018] The movable crank includes a crank base, and the movable magnet is tightly sleeved on the periphery of the crank base; the crank base is provided with a vertically penetrating central hole, and a vertically arranged core shaft is clamped between the bottom frame and the upper frame, and the core shaft penetrates through the central hole of the crank base;

[0019] A notch communicating with the rotor accommodating cavity is formed between the upper end of the bottom frame and the top frame, the driving swing arm is arranged at the upper end of the crank base, and the driving swing arm passes through the notch and extends to the outside of the wire winding frame.

[0020] Wherein, the coil winding includes a driving end coil and a braking end coil, and a limiting magnet is installed beside the movable magnet on the wire winding frame;

[0021] The outer periphery of the wire winding frame is tightly sleeved with a housing, and a Hall sensor is installed on the inner wall of the housing;

[0022] This multi-blade automatic aperture further includes an FPC circuit board, and the driving end coil, the braking end coil, and the Hall sensor are respectively electrically connected to the FPC circuit board.

[0023] Compared with the prior art, the present invention has the following beneficial effects. Specifically, the blade assembly of the present invention realizes the control and adjustment of the light transmission amount through the synchronous rotation of several movable blades. Compared with the translational double-blade structure in the prior art, the blade assembly of the present invention can effectively improve the control and adjustment accuracy of the light transmission amount of the automatic aperture. Therefore, the multi-blade automatic aperture of the present invention has the advantages of novel structural design and high light transmission amount control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 to the present invention.

[0025] Figure 1 It is a schematic structural diagram of the present invention.

[0026] Figure 2 is Figure 1 exploded schematic diagram of.

[0027] Figure 3 It is a schematic partial structure diagram of the present invention.

[0028] Figure 4 It is a schematic structural diagram of the blade drive assembly of the present invention.

[0029] Figure 5 It is a schematic sectional view of the blade drive assembly of the present invention.

[0030] In Figures 1 to 5 includes:

[0031] 1 - Fixed base; 11 - Base light transmission hole; 12 - Annular groove; 13 - Intermediate groove; 2 - Fixed cover plate; 21 - Cover plate light transmission hole; 31 - Blade accommodation cavity; 32 - Drive cavity; 4 - Blade assembly; 41 - Rotating part; 411 - Ring part; 412 - Drive part; 413 - Drive hole; 42 - Movable blade; 421 - Pivoting hole; 422 - Long hole; 43 - Blade pivot; 44 - Drive column; 5 - Blade drive assembly; 51 - Wire winding frame; 511 - Rotor accommodation cavity; 512 - Bottom frame; 513 - Top frame; 514 - Notch; 52 - Coil winding; 53 - Movable magnet; 54 - Movable rocker; 541 - Drive swing arm; 542 - Rocker base; 543 - Central hole; 55 - Core shaft; 56 - Outer shell; 57 - Hall sensor; 58 - FPC circuit board. SPECIFIC EMBODIMENTS

[0032] The present invention will be described below in conjunction with specific embodiments.

[0033] Embodiment 1, as Figures 1 to 3As shown in the figure, a multi-blade automatic aperture includes a fixed base 1 and a fixed cover plate 2 installed at the upper end of the fixed base 1. A blade accommodation cavity 31 and a driving cavity 32 are formed between the fixed base 1 and the fixed cover plate 2. The fixed base 1 is provided with a base light passing hole 11 that vertically penetrates and communicates with the blade accommodation cavity 31, and the fixed cover plate 2 is provided with a cover plate light passing hole 21 that vertically penetrates and is aligned with the base light passing hole 11.

[0034] Among them, as Figures 1 to 3 shown, a blade assembly 4 is embedded in the blade accommodation cavity 31. The fixed base 1 is provided with a blade driving assembly 5 extending into the driving cavity 32. The blade driving assembly 5 includes a winding frame 51 installed on the fixed base 1 and a coil winding 52 wound around the periphery of the winding frame 51. A rotor accommodation cavity 511 is formed inside the winding frame 51, and a magnet crank assembly is embedded in the rotor accommodation cavity 511; the magnet crank assembly includes a movable magnet 53 and a movable crank 54 connected to the movable magnet 53 and rotating synchronously with the movable magnet 53. The movable crank 54 is provided with a driving swing arm 541 that extends out of the winding frame 51 and extends into the driving cavity 32.

[0035] Furthermore, as Figure 2 and Figure 3 shown, the blade assembly 4 includes a rotating member 41 rotatably installed on the fixed base 1 and at least three movable blades 42 located above the rotating member 41; the rotating member 41 includes an annular portion 411 that is annular and surrounds the periphery of the base light passing hole 11. A driving portion 412 protruding outward is provided at the edge of the annular portion 411. The annular portion 411 and the driving portion 412 are an integral structure. The driving swing arm 541 of the blade driving assembly 5 is drivingly connected to the driving portion 412 of the rotating member 41.

[0036] Even further, as Figure 2 and Figure 3 shown, each movable blade 42 is respectively provided with a vertically penetrating pivot hole 421 and a long hole 422 located beside the pivot hole 421; the fixed base 1 is respectively provided with blade pivots 43 protruding from the bottom surface of the blade accommodation cavity 31 corresponding to the pivot holes 421 of each movable blade 42. Each blade pivot 43 is respectively inserted into the pivot hole 421 of the corresponding movable blade 42; on the upper surface of the annular portion 411 of the rotating member 41, driving columns 44 protruding upward are respectively provided corresponding to each movable blade 42. Each driving column 44 is respectively inserted into the long hole 422 of the corresponding movable blade 42.

[0037] It should be explained that the blade pivot 43 and the fixed base 1 are of an integral structure, and the drive column 44 and the circular ring portion 411 of the rotating member 41 are of an integral structure. Of course, the above integral structure design does not constitute a limitation to the first embodiment, that is, the blade pivot 43 and the drive column 44 of the first embodiment can also be assembled to the corresponding fixed base 1 and rotating member 41 by screwing respectively.

[0038] It should be noted that, as Figure 2 and Figure 3 shown, the number of the movable blades 42 is four. Of course, the number of the movable blades 42 of the multi-blade automatic aperture of the first embodiment can also be three, five, six, seven, etc.

[0039] When the multi-blade automatic aperture of the first embodiment works, the magnetic field force generated after the coil winding 52 is electrified acts on the movable magnet 53. The movable magnet 53 rotates under the action of the magnetic field force, and the movable magnet 53 drives the movable rocker 54 to rotate synchronously. The rotating movable rocker 54 drives the drive portion 412 of the rotating member 41 through its drive swing arm 541, so as to make the rotating member 41 rotate relative to the fixed base 1. Since each movable blade 42 is pivotally installed on the fixed base 1 by pivotally connecting through the pivot hole 421 with the corresponding blade pivot 43, during the rotation of the rotating member 41, the circular ring portion 411 drives each movable blade 42 to perform synchronous rotation actions through each drive column 44, so as to realize the control and adjustment of the light transmission amount passing through the light passing hole 11 of the base and the light passing hole 21 of the cover plate. Specifically, when each movable blade 42 rotates and swings outwards respectively, the light transmission amount of the multi-blade automatic aperture becomes larger; when each movable blade 42 rotates and swings inwards respectively, the light transmission amount of the multi-blade automatic aperture becomes smaller.

[0040] It should be emphasized that the blade assembly 4 of the first embodiment realizes the control and adjustment of the light transmission amount through the synchronous rotation actions of a plurality of movable blades 42. Compared with the translational double-blade structure in the prior art, the blade assembly 4 of the first embodiment can effectively improve the control and adjustment accuracy of the light transmission amount of the automatic aperture.

[0041] Based on the above situation, it can be known that through the above structural design, the multi-blade automatic aperture of the first embodiment has the advantages of novel structural design and high light transmission amount control accuracy.

[0042] Embodiment 2, as Figure 2 and Figure 3 shown, the difference between the second embodiment and the first embodiment is that: the fixed base 1 is provided with an annular groove 12 adapted to the circular ring portion 411 of the rotating member 41 at the bottom surface of the blade accommodating cavity 31, and the circular ring portion 411 of the rotating member 41 is rotationally fitted in the annular groove 12 of the fixed base 1.

[0043] Among them, the fixed base 1 is provided with an intermediate groove 13 between the annular groove 12 and the driving cavity 32, and the driving part 412 of the rotating part 41 passes through the intermediate groove 13 and extends into the driving cavity 32.

[0044] For the annular groove 12 of the second embodiment, it is formed on the fixed base 1. On the one hand, it can realize the quick and accurate installation of the circular ring part 411 of the rotating part 41, and on the other hand, it can effectively ensure the rotational freedom of the rotating part 41.

[0045] Embodiment Three, as Figure 2 and Figure 3 shown, the difference between this Embodiment Three and Embodiment Two is that: the driving part 412 of the rotating part 41 is provided with a vertically penetrating driving hole 413, and the driving swing arm 541 extends into the driving hole 413 of the driving part 412.

[0046] Among them, the end of the driving swing arm 541 can move relatively within the driving hole 413. During the process of the movable magnet 53 driving the movable rocker 54 to rotate synchronously during rotation, the driving swing arm 541 of the movable rocker 54 drives the driving part 412 of the rotating part 41, so that the rotating part 41 rotates relative to the fixed base 1.

[0047] Embodiment Four, as Figure 4 and Figure 5 shown, the difference between this Embodiment Four and Embodiment One is that: the wire winding frame 51 includes a bottom frame 512 and a top frame 513 installed at the upper end of the bottom frame 512, and the rotor accommodating cavity 511 is jointly surrounded by the bottom frame 512 and the top frame 513.

[0048] Among them, the movable rocker 54 includes a rocker base 542, and the movable magnet 53 is tightly sleeved on the periphery of the rocker base 542; the rocker base 542 is provided with a vertically penetrating central hole 543, and a vertically arranged core shaft 55 is clamped between the bottom frame 512 and the upper frame, and the core shaft 55 penetrates through the central hole 543 of the rocker base 542.

[0049] In addition, a notch 514 communicating with the rotor accommodating cavity 511 is formed between the upper end of the bottom frame 512 and the top frame 513. The driving swing arm 541 is arranged at the upper end of the rocker base 542, and the driving swing arm 541 passes through the notch 514 and extends to the outside of the wire winding frame 51.

[0050] Embodiment Five, the difference between this Embodiment Five and Embodiment One is that: the coil winding 52 includes a driving end coil (not shown in the figure), a braking end coil (not shown in the figure), and the wire winding frame 51 is provided with a limiting magnet (not shown in the figure) beside the movable magnet 53.

[0051] Among them, as Figures 1 to 5As shown, an outer shell 56 is tightly sleeved around the periphery of the wire winding frame 51, and a Hall sensor 57 is installed on the inner wall of the outer shell 56.

[0052] In addition, as Figures 1 to 5 shown, the multi-blade automatic aperture further includes an FPC circuit board 58, and the driving end coil, the braking end coil, and the Hall sensor 57 are respectively electrically connected to the FPC circuit board 58.

[0053] During the operation of the blade driving assembly 5 in the fifth embodiment, the magnetic field generated after the driving end coil is energized causes the movable magnet 53 to be affected by the Ampere force. At this time, the movable magnet 53 overcomes the attracting magnetic field force of the limiting magnet and drives the movable rocker 54 to rotate, thereby causing the driving swing arm 541 of the movable rocker 54 to drive the rotating member 41 to rotate, and further causing the blade assembly 4 to open; after the driving end coil is powered off, the movable magnet 53 rotates back under the attracting action of the limiting magnet and causes the blade assembly 4 to close. During this process, the braking end coil cuts the magnetic induction line to generate an induced voltage, causing the blade assembly 4 to close at a uniform speed.

[0054] In addition, for the Hall sensor 57 installed on the outer shell 56, it can monitor the position of the movable magnet 53, and thus monitor the opening and closing positions of the blade assembly 4; during this process, the Hall sensor 57 converts the magnetic flux density into a voltage and feeds the signal back to the corresponding controller, so as to control the required specific aperture.

[0055] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A multi - blade automatic aperture, comprising a fixed base (1), a fixed cover plate (2) installed at the upper end of the fixed base (1). A blade accommodating cavity (31) and a driving cavity (32) are formed between the fixed base (1) and the fixed cover plate (2). The fixed base (1) is provided with a base light - passing hole (11) vertically penetrating and communicating with the blade accommodating cavity (31), and the fixed cover plate (2) is provided with a cover plate light - passing hole (21) vertically penetrating and aligned with the base light - passing hole (11). A blade assembly (4) is embedded in the blade accommodating cavity (31). The fixed base (1) is provided with a blade driving assembly (5) extending into the driving cavity (32). The blade driving assembly (5) includes a winding frame (51) installed on the fixed base (1) and a coil winding (52) wound around the periphery of the winding frame (51). A rotor accommodating cavity (511) is formed inside the winding frame (51), and a magnet - crank assembly is embedded in the rotor accommodating cavity (511). The magnet - crank assembly includes a movable magnet (53) and a movable crank (54) connected to the movable magnet (53) and rotating synchronously with the movable magnet (53). The movable crank (54) is provided with a driving swing arm (541) extending out of the outside of the winding frame (51) and into the driving cavity (32). It is characterized in that: The blade assembly (4) includes a rotating member (41) rotatably installed on the fixed base (1) and at least three movable blades (42) located above the rotating member (41). The rotating member (41) includes an annular part (411) in a ring shape surrounding the periphery of the base light - passing hole (11). The edge part of the annular part (411) is provided with a driving part (412) protruding outward. The annular part (411) and the driving part (412) are of an integral structure. The driving swing arm (541) of the blade driving assembly (5) is drivingly connected to the driving part (412) of the rotating member (41). Each movable blade (42) is respectively provided with a vertically penetrating pivot hole (421) and a long hole (422) beside the pivot hole (421). The fixed base (1) is respectively provided with blade pivot shafts (43) protruding from the bottom surface of the blade accommodating cavity (31) corresponding to the pivot holes (421) of the movable blades (42). Each blade pivot shaft (43) is respectively inserted into the corresponding pivot hole (421) of the movable blade (42). On the upper surface of the annular part (411) of the rotating member (41), driving columns (44) protruding upward are respectively provided corresponding to the movable blades (42). Each driving column (44) is respectively inserted into the long hole (422) of the corresponding movable blade (42).

2. The multi-vane automatic iris according to claim 1, wherein: The fixed base (1) is provided with an annular groove (12) on the bottom surface of the blade accommodating cavity (31) adapted to the annular part (411) of the rotating member (41). The annular part (411) of the rotating member (41) is rotatably embedded in the annular groove (12) of the fixed base (1). The fixed base (1) is provided with an intermediate groove (13) between the annular groove (12) and the driving cavity (32). The driving part (412) of the rotating member (41) passes through the intermediate groove (13) and extends into the driving cavity (32).

3. The multi-vane automatic aperture according to claim 2, wherein: A driving hole (413) vertically penetrating is formed in a driving part (412) of the rotating part (41), and the driving swing arm (541) extends into the driving hole (413) of the driving part (412).

4. A multi-vane automatic aperture according to claim 1, characterized in that: The blade pivot (43) and the fixed base (1) are of an integral structure, and the driving column (44) and the circular ring part (411) of the rotating part (41) are of an integral structure.

5. A multi-vane automatic aperture according to claim 1, characterized in that: The wire winding frame (51) includes a bottom frame (512) and a top frame (513) installed at the upper end of the bottom frame (512), and the rotor accommodating cavity (511) is jointly formed by enclosing the bottom frame (512) and the top frame (513); The movable crank (54) includes a crank base (542), and the movable magnet (53) is tightly sleeved around the outer periphery of the crank base (542); a central hole (543) vertically penetrating is formed in the crank base (542), and a core shaft (55) arranged vertically is clamped between the bottom frame (512) and the upper frame, and the core shaft (55) penetrates through the central hole (543) of the crank base (542); A notch (514) communicating with the rotor accommodating cavity (511) is formed between the upper end of the bottom frame (512) and the top frame (513), the driving swing arm (541) is arranged at the upper end of the crank base (542), and the driving swing arm (541) passes through the notch (514) and extends to the outside of the wire winding frame (51).

6. A multi-vane automatic aperture according to claim 1, wherein: The coil winding (52) includes a driving end coil and a braking end coil, and a limiting magnet is installed beside the movable magnet (53) on the wire winding frame (51); A housing (56) is tightly sleeved around the outer periphery of the wire winding frame (51), and a Hall sensor (57) is installed on the inner wall of the housing (56); The multi-blade automatic aperture further includes an FPC circuit board (58), and the driving end coil, the braking end coil, and the Hall sensor (57) are respectively electrically connected to the FPC circuit board (58).

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