Variable aperture adjustment device

Abstract

The present application provides a variable aperture adjustment device, which relates to the field of optical element drive technology. Among them, it includes: a blade group, a carrier component, a drive component, a base, a protective shell, a magnetic component and a limit block. The blade group is fixedly connected to the carrier component, and a limit block and a magnetic component are arranged in the carrier component. The drive component is arranged on the carrier component, and the carrier component is mounted on the base, and the protective shell is buckled on the base; the drive component includes a clamp and four memory alloy wires, the clamp is fixed and electrically connected to the carrier component, and the memory alloy wire is connected to the clamp. When the memory alloy wire is energized and deformed, the carrier component rotates relatively, thereby driving the blade group to rotate and realizing the adjustment of the aperture. The technical solution of the present application solves the technical problems that the existing products in the prior art are mostly electromagnetic drive solutions, and the product structure is mostly a ball-type limit structure. Under the condition of ensuring the moving space of the mover, it is necessary to adopt the method of adding additional parts to realize the normal movement of the motor.

Description

Technical Field

[0001] The present application relates to the technical field of optical element driving, and in particular to a variable aperture adjustment device. Background Art

[0002] With the development of electronic technology, users of electronic devices (such as smart phones or digital cameras) now have higher and higher requirements for photo or video recording functions, and the demand for miniature camera modules is also increasing. As for the camera aperture, in places with strong light, the camera can obtain a deeper depth of field and a sharper picture by reducing the aperture, and in places with insufficient light, the amount of light entering can be increased by increasing the aperture, so that a pure picture with higher exposure and lower noise can be obtained.

[0003] Most of the existing products are electromagnetically driven solutions, and the product structure is mostly a ball-type limit structure. While ensuring the moving space of the mover, additional parts must be added to achieve normal movement of the motor. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a variable aperture adjustment device to solve the problem that most existing products in the prior art are electromagnetically driven solutions, and the product structure is mostly a ball-type limit structure. While ensuring the moving space of the mover, additional parts need to be added to achieve normal movement of the motor.

[0005] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0006] The present application provides a variable aperture adjustment device, comprising: a blade group, a carrier component, a driving component, a base, a protective shell, a magnetic suction component and a limit block, wherein the blade group is fixedly connected to the carrier component, the limit block and the magnetic suction component are arranged in the carrier component, the driving component is arranged on the carrier component, the carrier component is mounted on the base, and the protective shell is buckled on the base;

[0007] The driving assembly includes a clamp and a memory alloy wire, the clamp is fixed to and electrically connected to the carrier assembly, the memory alloy wire is connected to the clamp, and when the memory alloy wire is energized and deformed, the carrier assembly rotates relatively, thereby driving the blade assembly to rotate, thereby realizing the adjustment of the aperture;

[0008] Among them, the number of memory alloy wires is four.

[0009] In some modified embodiments of the present application, the carrier assembly includes a first carrier and a second carrier, the first carrier is provided with a PIN pin, the first carrier and the second carrier are both provided with a metal reinforcement, the PIN pin is electrically connected to the metal reinforcement, and the metal reinforcement is electrically connected to the clamp, for providing an electrical signal to the memory alloy wire.

[0010] In some modified implementations of the present application, the magnetic attraction component includes a first magnetic attraction component and a second magnetic attraction component, the first magnetic attraction component includes a first magnet and a magnetic attraction sheet, the first magnet is arranged on the side of the second carrier, and the magnetic attraction sheet is arranged on the side of the first carrier to provide a side magnetic attraction force; the second magnetic attraction component includes a second magnet, and the second magnet and the metal reinforcement or the PIN pin attract each other to provide a Z-direction magnetic attraction force;

[0011] Wherein, the first magnet corresponds to the magnetic attraction sheet.

[0012] In some modified embodiments of the present application, the blade group includes a plurality of blades that are circumferentially overlapped, one end of the blade is connected to the first carrier, and the other end of the blade is connected to the second carrier.

[0013] In some modified implementations of the present application, a fixing hole is provided on the blade, and a first fixing column is provided on the first carrier. The first fixing column passes through the fixing hole, so that the blade and the first carrier are fixed in a limited position.

[0014] In some modified implementations of the present application, a fixing groove is further provided on the blade, and a second fixing column is provided on the second carrier. The second fixing column passes through the fixing groove, so that the blade is movably fixed to the second carrier.

[0015] In some modified implementations of the present application, it also includes: a Soma sheet, wherein the Soma sheet is arranged between the first carrier and the blade group.

[0016] In some modified implementations of the present application, it also includes: a limiting ring, which is arranged on the blade assembly and fixed to the first carrier.

[0017] In some modified implementations of the present application, the limit block is disposed between the first carrier and the second carrier, and is fixed on the first carrier;

[0018] The number of the limiting blocks is four.

[0019] In some modified implementations of the present application, the driving component is disposed between the carrier component and the protective shell;

[0020] Alternatively, the driving component is disposed between the carrier component and the base.

[0021] Compared with the prior art, the variable aperture adjustment device provided in the present application is driven by a memory alloy wire, which has a greater driving force and can effectively reduce the internal space of the device, especially in the height direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0023] Figure 1 The exploded structure diagram of the variable aperture adjustment device in the first embodiment is schematically shown;

[0024] Figure 2 The schematic diagram of the structure of the connection between the first carrier and the second carrier in the first embodiment is shown schematically;

[0025] Figure 3 The schematic diagram of the structure of the connection between the first carrier, the second carrier and the driving assembly in the first embodiment is schematically shown;

[0026] Figure 4 The structure diagram of the first branch of the electrical signal transmission of the variable aperture adjustment device in the first embodiment is schematically shown;

[0027] Figure 5 The structure diagram of the second branching path of the electrical signal transmission of the variable aperture adjustment device in the first embodiment is schematically shown;

[0028] Figure 6 The exploded structure diagram of the first carrier, the second carrier, the magnetic attraction component and the limit block in the first embodiment is schematically shown;

[0029] Figure 7 The structure diagram of the blade assembly in the first embodiment is schematically shown;

[0030] Figure 8 The structure diagram of the variable aperture adjustment device without a protective cover in the first embodiment is schematically shown;

[0031] Fig. 9 The schematic diagram of the structure of the connection between the first carrier, the second carrier and the driving assembly in the second embodiment is schematically shown.

[0032] Description of Figure Numbers:

[0033] 1. Base; 2. Driving assembly; 21. Clamping claw; 22. Memory alloy wire; 3. Carrier assembly; 31. First carrier; 311. First fixing column; 312. PIN foot; 32. Second carrier; 321. Second fixing column; 4. Blade assembly; 41. Blade; 411. Fixing hole; 412. Fixing groove; 5. Protective shell; 6. Magnetic assembly; 61. First magnetic assembly; 611. First magnet; 612. Magnetic sheet; 62. Second magnetic assembly; 621. Second magnet; 7. Limit block; 8. Soma sheet; 9. Limit ring. DETAILED DESCRIPTION

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs. Embodiment 1

[0036] like Figures 1 to 9 As shown, the present embodiment 1 provides a variable aperture adjustment device, including: a base 1, a driving component 2, a carrier component 3, a blade group 4, a protective shell 5, a magnetic component 6, a limit block 7, a Soma sheet (light shielding sheet) 8 and a limit ring 9. The carrier component 3 is mounted on the base 1, and a magnetic component 6 is provided in the carrier component 3. The magnetic component 6 is used to provide a magnetic attraction force. The driving component 2 is arranged on the carrier component 3, the Soma sheet 8 is arranged between the carrier component 3 and the blade group 4, the blade group 4 is arranged on the Soma sheet 8 and is fixedly connected to the carrier component 3. The limit ring 9 It is arranged on the blade group 4 and fixedly connected to the carrier component 3. The protective shell 5 is buckled on the base 1. The protective shell 5 can be a tensile member and can be covered with a Soma sheet. The driving component 2 includes a clamp 21 and a memory alloy wire 22. The number of the memory alloy wires (SMA wires) 22 is preferably four. The clamp 21 is fixed and electrically connected to the carrier component 3. The memory alloy wire 22 is connected to the clamp 21. When the memory alloy wire 22 is energized and deformed, the carrier component 3 rotates relatively, driving the blade group 4 to rotate, controlling the opening and closing size, thereby realizing the adjustment of the aperture.

[0037] The utility model adopts a four-SMA wire driving solution. The four SMA wires are arranged on the outside around the mover and the stator. The four wires are grouped in pairs. Each group of wires drives the carrier assembly 3 to rotate in one direction. The driving force is large and the internal space of the device can be effectively reduced, especially in the height direction.

[0038] Most of the existing products have a carrier component 3 with a positioning column structure in the Z direction and a ball groove structure on the side. The relative position of the ball groove and the positioning column fluctuates greatly and is not easy to monitor, resulting in poor performance. The limiting structure of the utility model is a built-in limiting block 7 that cooperates with the magnetic component 6 on the edge of the carrier component 3. One or more of the built-in limiting blocks 7 and less than four can be replaced by a ball or roller structure, eliminating the method of completely using a ball or roller structure for limiting. The process is simple and cost-saving. At the same time, the matching position is line contact, which can effectively reduce the tilt of the carrier component 3 inside the device, ensure the consistency of the carrier component 3 during movement, and improve the performance yield. At the same time, the internal gap of the carrier component 3 can be adjusted through one or more ball or roller structures. Compared with all four places being ball or roller structures, the variables are reduced and the performance is easier to optimize.

[0039] Specifically, the carrier assembly 3 includes a first carrier 31 and a second carrier 32. Figure 3 As shown, the first carrier 31 and the second carrier 32 are fixed to the driving assembly 2 , and the driving assembly 2 is arranged between the carrier assembly 3 and the base 1 .

[0040] like Figure 1 , Figure 3 and Figure 8 As shown, in a specific implementation, a PIN pin 312 is provided on the first carrier 31 for external electrical signals, and metal reinforcements are provided in the first carrier 31 and the second carrier 32. The PIN pin 312 is electrically connected to the metal reinforcement, and the metal reinforcement is electrically connected to the clamp 21 for providing electricity to the memory alloy wire 22. When the memory alloy wire 22 is energized and deformed, the first carrier 31 and the second carrier 32 rotate relative to each other, driving the blade group 4 to rotate, controlling the opening and closing size between adjacent blades 41, thereby realizing aperture adjustment.

[0041] Specifically, Figure 6 As shown, the magnetic attraction component 6 includes a first magnetic attraction component 61 and a second magnetic attraction component 62. The first magnetic attraction component 61 includes a first magnet 611 and a magnetic attraction sheet 612. The first magnet 611 is arranged on the side of the second carrier 32, and the magnetic attraction sheet 612 is arranged on the side of the first carrier 31. The first magnet 611 and the magnetic attraction sheet 612 are arranged correspondingly, and the first magnet 611 and the magnetic attraction sheet 612 attract each other to provide side magnetic attraction force; the second magnetic attraction component 62 includes a second magnet 621, and the second magnet 621 is arranged between the first carrier 31 and the second carrier 32. The second magnet 621 and the metal reinforcement or PIN foot 312 attract each other to provide Z-direction magnetic attraction force.

[0042] like Figure 1 , Figure 7 and Figure 8As shown, in a specific implementation, the blade group 4 includes a plurality of blades 41 that are circumferentially overlapped, one end of the blade 41 is connected to the first carrier 31, and the other end is connected to the second carrier 32. The carrier assembly 3 rotates to drive the blades 41 to rotate and open and close, thereby controlling the opening and closing size between adjacent blades 41.

[0043] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, in a specific implementation, a fixing hole 411 and a fixing groove 412 are provided on the blade 41, and a first fixing column 311 is provided on the first carrier 31. The first fixing column 311 passes through the fixing hole 411, so that the blade 41 and the first carrier 31 are limitedly fixed; a second fixing column 321 is provided on the second carrier 32, and the second fixing column 321 passes through the fixing groove 412, so that the blade 41 and the second carrier 31 are movably fixed.

[0044] like Figure 1 As shown, in a specific implementation, the Soma sheet 8 is disposed between the first carrier 31 and the blade group 4 to carry the blades 41 and provide the maximum circle of the aperture.

[0045] Specifically, the limiting ring 9 is arranged on the blade group 4. The limiting ring 9 can be a sheet metal part, which is fixedly connected to the first carrier 31 and can be a welding connection, which effectively improves the connection strength and can improve the problem of the limiting ring 9 falling off.

[0046] Specifically, the limit block 7 is disposed between the first carrier 31 and the second carrier 32 and is fixed on the first carrier 31 to play a limiting role;

[0047] The number of the limiting blocks 7 is preferably four.

[0048] The electric signal transmission in the utility model is divided into two paths, which are used to adjust the aperture to become larger and smaller respectively:

[0049] like Figure 4 As shown, the first branch electrical signal transmission: a1 (PIN pin) is transmitted to a2 (claw) through the metal reinforcement, transmitted to a3 (claw) through the memory alloy wire, transmitted to a4 (claw) through the metal reinforcement, transmitted to a5 (claw) through the memory alloy wire, and transmitted to a6 (PIN pin) through the metal reinforcement;

[0050] like Figure 5 As shown, the second branch electrical signal transmission: b1 (PIN pin) is transmitted to b2 (claw) through the metal reinforcement, transmitted to b3 (claw) through the memory alloy wire, transmitted to b4 (claw) through the metal reinforcement, transmitted to b5 (claw) through the memory alloy wire, transmitted to b6 (PIN pin) through the metal reinforcement

[0051] Embodiment 2

[0052] like Figure 1 , Figure 2 , Figures 4 to 9 As shown, the second embodiment provides a variable aperture adjustment device, wherein the difference from the first embodiment is that the driving component 2 is arranged between the carrier component 3 and the protective shell 4, and the rest of the parts are consistent with the first embodiment and will not be repeated here.

[0053] The protection scope of this application is not limited to this. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this application, which should be included in the protection scope of this application. Therefore, the protection scope of this application should be based on the protection scope of the claims.

Claims

1. A variable aperture adjustment device, characterized in that: include: A blade assembly, a carrier assembly, a driving assembly, a base, a protective shell, a magnetic assembly and a limit block, wherein the blade assembly is fixedly connected to the carrier assembly, the limit block and the magnetic assembly are arranged in the carrier assembly, the driving assembly is arranged on the carrier assembly, the carrier assembly is mounted on the base, and the protective shell is buckled on the base; The driving assembly includes a clamp and a memory alloy wire, the clamp is fixed to and electrically connected to the carrier assembly, the memory alloy wire is connected to the clamp, and when the memory alloy wire is energized and deformed, the carrier assembly rotates relatively, thereby driving the blade assembly to rotate, thereby realizing the adjustment of the aperture; Wherein, the number of the memory alloy wires is four.

2. The variable aperture adjustment device according to claim 1, characterized in that: The carrier assembly includes a first carrier and a second carrier, the first carrier is provided with a PIN pin, the first carrier and the second carrier are both provided with a metal reinforcement, the PIN pin is electrically connected to the metal reinforcement, and the metal reinforcement is electrically connected to the clamp, so as to provide an electrical signal for the memory alloy wire.

3. The variable aperture adjustment device according to claim 2, characterized in that: The magnetic attraction component includes a first magnetic attraction component and a second magnetic attraction component, the first magnetic attraction component includes a first magnet and a magnetic attraction sheet, the first magnet is arranged on the side of the second carrier, and the magnetic attraction sheet is arranged on the side of the first carrier to provide a side magnetic attraction force; the second magnetic attraction component includes a second magnet, and the second magnet and the metal reinforcement or the PIN pin attract each other to provide a Z-direction magnetic attraction force; Wherein, the first magnet corresponds to the magnetic attraction sheet.

4. The variable aperture adjustment device according to claim 2, characterized in that: The blade group includes a plurality of blades which are circumferentially overlapped, one end of each blade is connected to the first carrier, and the other end of each blade is connected to the second carrier.

5. The variable aperture adjustment device according to claim 4, characterized in that: The blade is provided with a fixing hole, the first carrier is provided with a first fixing column, and the first fixing column passes through the fixing hole, so that the blade and the first carrier are fixed in a limited position.

6. The variable aperture adjustment device according to claim 5, characterized in that: The blade is also provided with a fixing groove, and the second carrier is provided with a second fixing column, and the second fixing column passes through the fixing groove, so that the blade and the second carrier are movably fixed.

7. The variable aperture adjustment device according to claim 2, characterized in that: Also includes: A Soma sheet is provided between the first carrier and the blade group.

8. The variable aperture adjustment device according to claim 2, characterized in that: Also includes: A limiting ring is arranged on the blade assembly and fixed to the first carrier.

9. The variable aperture adjustment device according to claim 2, characterized in that: The limiting block is arranged between the first carrier and the second carrier, and is fixed on the first carrier; Wherein, the number of the limit blocks is four.

10. The variable aperture adjustment device according to claim 1, characterized in that: The driving assembly is disposed between the carrier assembly and the protective shell; Alternatively, the driving component is disposed between the carrier component and the base.

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