Filter switching mechanism and camera module

Abstract

The utility model discloses a kind of optical filter switching mechanism and camera module, it is related to optical imaging field, wherein, optical filter switching mechanism includes: upper cover;Lower cover is connected with upper cover buckle, lower cover is equipped with the installation slot being communicated with containing cavity, upper cover and lower cover are all set up the window being communicated with containing cavity, and two windows are oppositely arranged;Shading piece sets up first port and second port, and shading piece is pasted with first optical filter opposite with first port and second optical filter opposite with second port, one end of shading piece is equipped with connecting hole;Driving mechanism is located in installation slot, driving mechanism includes connecting frame and power component, power component is connected with connecting frame and drives connecting frame reciprocating rotation, one end of connecting frame is equipped with connecting rod, connecting rod is inserted into connecting hole to drive shading piece to slide in containing cavity, and switch first optical filter and second optical filter cover window to pass through light.The optical filter switching mechanism structure simple that the utility model technical scheme proposes can quickly switch optical filter.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging technology, and in particular to a filter switching mechanism and a camera module. Background Technology

[0002] Traditional camera modules require manual filter replacement or the use of two independent lens modules when switching between day and night, which is inefficient, costly, and unreliable. Electromagnetic ICR switchers have problems such as large size, high power consumption, potential electromagnetic interference during switching, limited mechanical life, or switching shock / noise.

[0003] Existing motor-driven ICR switches are complex in structure, expensive, require strict positioning accuracy, and have insufficient response speed. Utility Model Content

[0004] The main purpose of this utility model is to provide a filter switching mechanism, which aims to solve the technical problems of complex structure and slow switching speed of current filter switchers.

[0005] To achieve the above objectives, the filter switching mechanism proposed in this utility model includes:

[0006] Top cover;

[0007] The lower cover is fastened to the upper cover, and the two together form a cavity. The lower cover is provided with a mounting groove that communicates with the cavity. Both the upper cover and the lower cover have windows that communicate with the cavity, and the two windows are arranged opposite to each other.

[0008] A light-shielding sheet is disposed within the cavity, and the light-shielding sheet has a first opening and a second opening. A first filter opposite the first opening and a second filter opposite the second opening are attached to the light-shielding sheet. One end of the light-shielding sheet has a connecting hole.

[0009] A drive mechanism is provided in the mounting slot. The drive mechanism includes a connecting frame and a power component. The power component is connected to the connecting frame and drives the connecting frame to reciprocate. One end of the connecting frame is provided with a connecting rod. The connecting rod is inserted into the connecting hole to drive the light-shielding sheet to slide in the cavity, thereby switching the first filter and the second filter to cover the window to allow light to pass through.

[0010] In one embodiment, the lower cover is provided with at least two first support rails, and the upper cover is provided with at least two second support rails. The extending directions of the first support rails and the second support rails are consistent with the sliding direction of the light-shielding sheet, and the light-shielding sheet slides along the first support rails and the second support rails.

[0011] In one embodiment, the side wall of the lower cover is provided with multiple sets of limiting protrusions, and the multiple limiting protrusions are spaced apart along the sliding direction of the light-shielding sheet, and the side edge of the light-shielding sheet contacts the limiting protrusions to limit the displacement of the light-shielding sheet from its sliding direction.

[0012] In one embodiment, the connecting frame is provided with a limiting post, which is used to contact the upper cover to limit the displacement of the connecting frame.

[0013] In one embodiment, the power assembly includes an iron core frame, a coil, and a magnetic component. A support platform is provided in the mounting groove, the iron core frame is fixedly mounted on the support platform, the coil is wound around the iron core frame, and the iron core frame is also provided with a slot. The magnetic component is movably mounted in the slot. The coil is connected to a power source to generate a magnetic field to drive the magnetic component to rotate. The connecting frame is connected to the magnetic component.

[0014] In one embodiment, the connecting frame is provided with a connecting post, the magnetic component has an insertion hole, and the connecting post is inserted into the insertion hole and has an interference fit with the insertion hole.

[0015] In one embodiment, one of the side wall of the connecting post and the inner wall of the insertion hole is provided with a limiting protrusion, and the other is provided with a limiting groove, wherein the limiting protrusion and the limiting groove are adapted to each other.

[0016] In one embodiment, the power assembly is further provided with a positioning post, the lower cover is provided with a positioning hole, one end of the positioning post is movably inserted into the positioning hole, and the positioning post is also fixedly connected to the connecting post.

[0017] In one embodiment, the connecting hole is an elongated hole, and the end of the connecting rod is provided with a limiting rod, which is used to prevent the light-shielding sheet from disengaging from the connecting rod.

[0018] This utility model also proposes a camera module, including the filter switching mechanism as described above.

[0019] This utility model's technical solution uses an upper and lower cover that snaps together to form a cavity, and a light-shielding sheet is installed inside the cavity. The light-shielding sheet is equipped with a first filter and a second filter. By switching between the first and second filters to cover the window and filter light passing through it, the system meets the imaging requirements in different environments. The movement of the light-shielding sheet is driven by a drive mechanism. The power component of the drive mechanism drives the connecting frame to rotate and reciprocate, causing the light-shielding sheet to slide within the cavity, thereby switching between the first and second filters opposite the window. Specifically, the connecting frame has a connecting rod that inserts into the insertion hole of the light-shielding sheet. The connecting frame is also connected to the power component, which, through the drive component and the connecting frame, drives the light-shielding sheet to slide. The structure is simple, easy to assemble, and the filter switching is achieved simply by swinging the connecting frame, resulting in fast switching speed and high efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 An exploded view of an embodiment of the filter switching mechanism provided by this utility model;

[0022] Figure 2 Another exploded view of an embodiment of the filter switching mechanism provided by this utility model;

[0023] Figure 3 A schematic diagram illustrating filter switching in an embodiment of the filter switching mechanism provided by this utility model;

[0024] Figure 4 A cross-sectional structural schematic diagram of an embodiment of the filter switching mechanism provided by this utility model;

[0025] Figure 5 A schematic diagram of the power component of an embodiment of the filter switching mechanism provided by this utility model;

[0026] Figure 6 This is a schematic diagram of an embodiment of the filter switching mechanism provided by this utility model.

[0027] Explanation of icon numbers:

[0028] 100. Top cover; 110. Window; 120. Second support rail; 130. Buckle;

[0029] 200, lower cover; 210, mounting groove; 211, support platform; 220, first support rail; 230, limiting protrusion; 240, positioning hole;

[0030] 300, light-shielding plate; 310, first opening; 320, second opening; 330, connecting hole;

[0031] 400. First filter;

[0032] 500. Second filter;

[0033] 600. Drive mechanism; 610. Connecting frame; 611. Connecting rod; 612. Limiting post; 613. Connecting post; 614. Limiting rod; 620. Power component; 621. Iron core frame; 622. Coil; 623. Magnetic component; 624. Slot; 625. Insertion hole; 630. Limiting protrusion; 640. Limiting groove; 650. Positioning post.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] In the existing technology, motor-driven ICR switchers have a complex structure, high cost, demanding positioning accuracy requirements, and slow response speed.

[0039] This utility model proposes a filter switching mechanism.

[0040] Please see Figures 1 to 6 In one embodiment of this utility model, the filter switching mechanism includes: an upper cover 100, a lower cover 200, a light-shielding sheet 300, and a driving mechanism 600. The lower cover 200 is fastened to the upper cover 100, and the two together form a cavity. The lower cover 200 has a mounting groove 210 communicating with the cavity. Both the upper cover 100 and the lower cover 200 have windows 110 communicating with the cavity, and the two windows 110 are arranged opposite to each other. The light-shielding sheet 300 is disposed within the cavity, and the light-shielding sheet 300 has a first opening 310 and a second opening 320. The light-shielding sheet 300 is affixed with a component opposite to the first opening 310. A first filter 400 and a second filter 500 opposite to the second port 320 are provided. One end of the light-shielding plate 300 is provided with a connection hole 330. The drive mechanism 600 is provided in the mounting groove 210. The drive mechanism 600 includes a connecting frame 610 and a power component 620. The power component 620 is connected to the connecting frame 610 and drives the connecting frame 610 to reciprocate. One end of the connecting frame 610 is provided with a connecting rod 611. The connecting rod 611 is inserted into the connection hole 330 to drive the light-shielding plate 300 to slide in the cavity, thereby switching the first filter 400 and the second filter 500 to cover the window 110 to transmit light.

[0041] In this embodiment, it should be noted that the first filter 400 and the second filter 500 are different. The first is an IR filter, with a transmittance of over 90% for visible light with wavelengths of 400-600nm and a transmittance of less than 0.3% for infrared light with wavelengths of 680-1100nm. The other is an AR filter, a fully transparent glass sheet, with a transmittance of over 90% for all wavelengths of 400-1100nm. The thicknesses of the two filters are listed below; however, the actual thickness combination is not limited to this specific combination.

[0042] IR FILTER (mm) AR FILTER (mm) 1 0.33 0.3 2 0.3 0.3 3 0.3 0.21 4 0.3 0.145 5 0.21 0.145

[0043] In the specific implementation process, the upper cover 100 and the lower cover 200 are connected by snap fasteners 130. Specifically, multiple snap fasteners 130 are arranged at intervals along the circumference of the upper cover 100 and the lower cover 200. Each snap fastener 130 includes a snap plate and a protrusion. The snap plate is located on the edge of the upper cover 100, and the protrusion is located on the lower cover 200. The connection between the upper cover 100 and the lower cover 200 is achieved by the snapping of the snap plate and the protrusion. The upper cover 100 and the lower cover 200 form a cavity to accommodate the light-shielding sheet 300. The first light filter 400 and the second light filter 500 are both attached to the light-shielding sheet 300 and correspondingly cover the first opening 310 and the second opening 320. When the first light filter 400 is used for filtering, the driving mechanism 600 drives the light-shielding sheet 300 to slide so that the first light filter 400 corresponds to the window 110, so that light can pass through the first light filter 400. When the second filter 500 is used for filtering, the drive mechanism 600 drives the light-shielding plate 300 to slide and switch to the second filter 500 corresponding to the window 110, which is convenient and quick.

[0044] In this embodiment, the lower cover 200 also forms a mounting groove 210, which communicates with the cavity to accommodate the drive mechanism 600. The drive mechanism 600 includes a connecting frame 610 and a power component 620. The power component 620 is drivenly connected to the connecting frame 610 to drive the connecting frame 610 to swing. The power component 620 can be a motor structure or other structure that provides rotational power, and is not limited here. The connecting frame 610 is also connected to a light-shielding sheet 300, which causes the light-shielding sheet 300 to slide back and forth to switch between the first filter 400 and the second filter 500. The light-shielding sheet 300 has a connecting hole 330, and the connecting frame 610 has a connecting rod 611. The connecting rod 611 is inserted into the connecting hole 330 and drives the light-shielding sheet 300 to slide back and forth during the swinging of the connecting rod 611.

[0045] This utility model's technical solution uses an upper cover 100 and a lower cover 200 fastened together to form a cavity, and a light-shielding plate 300 is installed inside the cavity. The light-shielding plate 300 is equipped with a first filter 400 and a second filter 500. By switching between the first filter 400 and the second filter 500 covering the window 110 and filtering the light passing through the window 110, the system meets the imaging requirements in different environments. The movement of the light-shielding plate 300 is driven by a drive mechanism 600. The power component 620 of the drive mechanism 600 drives the connecting frame 610 to rotate and reciprocate, causing the light-shielding plate 300 to slide within the cavity, thereby switching between the first filter 400 and the second filter 500 opposite to the window 110. (See reference...) Figure 3 As shown. Specifically, the connecting frame 610 has a connecting rod 611, which is inserted into the insertion hole 625 of the light-shielding plate 300. The connecting frame 610 is also connected to a power assembly 620, which drives the light-shielding plate 300 to slide through the drive assembly and the connecting frame 610. The structure is simple, easy to assemble, and the switching of the filter can be achieved by swinging the connecting frame 610, which has a fast switching speed and high efficiency.

[0046] refer to Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment, the lower cover 200 is provided with at least two first support rails 220, and the upper cover 100 is provided with at least two second support rails 120. The extending directions of the first support rails 220 and the second support rails 120 are consistent with the sliding direction of the light-shielding sheet 300, and the light-shielding sheet 300 slides along the first support rails 220 and the second support rails 120.

[0047] Understandably, the light-shielding sheet 300 slides within the cavity, and contact between the light-shielding sheet 300 and the inner wall of the cavity can easily cause wear on the light-shielding sheet 300 or the two filters, or cause the two filters to fall off. In this embodiment, by providing a support rail on the inner wall of the cavity, the contact area between the support rail and the light-shielding sheet 300 is reduced, thereby reducing wear on the light-shielding sheet 300. Furthermore, the support rail is located on both sides of the first filter 400 and the second filter 500, avoiding contact and thus preventing wear that could affect the light transmittance.

[0048] Specifically, two first support rails 220 are arranged in parallel and located on both sides of the window 110 of the lower cover 200, and two second support rails 120 are arranged in parallel and located on both sides of the window 110 of the upper cover 100. The first support rails 220 and the second support rails 120 are staggered in the direction perpendicular to the light shield 300 to reduce the contact stress on the light shield 300, so that the light shield 300 can slide smoothly and reduce wear.

[0049] In one embodiment, the side wall of the lower cover 200 is provided with multiple sets of limiting protrusions 230. The multiple limiting protrusions 230 are spaced apart along the sliding direction of the light shield 300, and the side edge of the light shield 300 contacts the limiting protrusions 230 to limit the displacement of the light shield 300 from its sliding direction.

[0050] In the specific implementation process, the limiting protrusion 230 is used to limit the displacement of the light shield 300 in the vertical or biased sliding direction within the cavity. Specifically, the lower cover 200 is provided with the limiting protrusion 230 on the inner sidewall parallel to the sliding direction of the light shield 300. Multiple limiting protrusions 230 are provided at intervals along the sliding direction of the light shield 300. The edge of the light shield 300 contacts the limiting protrusion 230, thereby reducing the contact area with the light shield 300 and limiting the displacement of the light shield 300 to prevent the light shield 300 from shaking and affecting the switching of the filter.

[0051] refer to Figure 5 As shown, in one embodiment, the connecting frame 610 is provided with a limiting post 612, which is used to contact the upper cover 100 to limit the displacement of the connecting frame 610. The limiting post 612 protrudes from the surface of the connecting frame 610 facing the upper cover 100, and one end of the limiting post 612 contacts the upper cover 100 to limit the displacement of the connecting frame 610 perpendicular to the swing surface through the upper cover 100, thereby ensuring the installation stability of the connecting frame 610.

[0052] In one embodiment, the power assembly 620 includes a core frame 621, a coil 622, and a magnetic component 623. A support platform 211 is provided in the mounting groove 210. The core frame 621 is fixedly mounted on the support platform 211. The coil 622 is wound around the core frame 621. The core frame 621 is also provided with a slot 624. The magnetic component 623 is movably mounted in the slot 624. The coil 622 is connected to a power source to generate a magnetic field to drive the magnetic component 623 to rotate. The connecting frame 610 is connected to the magnetic component 623.

[0053] In the specific implementation process, the iron core frame 621 is snapped onto the support platform 211. The coil 622 is connected to a wire, which generates a magnetic field when the power is turned on, driving the magnetic component 623 to rotate. By changing the direction of the current, the direction of the magnetic field can be changed, thereby driving the magnetic component 623 to rotate in the opposite direction. The magnetic component 623 is connected to the connecting frame 610, which in turn drives the connecting frame 610 to oscillate back and forth. It can be understood that the iron core frame is provided with a slot 624, and the magnetic component 623 is located in the slot 624. In this way, part of the iron core frame surrounds the outer periphery of the magnetic component 623, and there is a gap between the iron core frame and the magnetic component 623 to ensure that the magnetic component 623 can rotate smoothly.

[0054] In practical implementation, the connecting frame 610 is provided with a connecting post 613, and the magnetic component 623 has an insertion hole 625. The connecting post 613 is inserted into the insertion hole 625 and is interference-fitted with the insertion hole 625. In practical implementation, the insertion hole 625 is provided along the axis of the magnetic component 623, and the connecting post 613 is interference-fitted with the insertion hole 625, thereby causing the magnetic component 623 to rotate and drive the connecting frame 610 to swing.

[0055] Furthermore, one of the side wall of the connecting post 613 and the inner wall of the insertion hole 625 is provided with a limiting protrusion 630, and the other is provided with a limiting groove 640, with the limiting protrusion 630 and the limiting groove 640 being adapted to each other. In order to avoid relative movement between the connecting post 613 and the insertion hole 625, this embodiment improves the stability of the connection between the connecting post 613 and the magnetic component 623 and limits the relative movement in the circumferential direction between the connecting post 613 and the magnetic component 623 by providing mutually adapted and pluggable limiting protrusion 630 and limiting groove 640 between the connecting post 613 and the insertion hole 625.

[0056] In one embodiment, the power assembly 620 further includes a positioning post 650, and the lower cover has a positioning hole 240. One end of the positioning post 650 is movably inserted into the positioning hole 240, and the positioning post 650 is also fixedly connected to the connecting post 613. The positioning post 650 serves to position the power assembly 620 during installation. Inserting the positioning post 650 into the positioning hole 240 facilitates the positioning and installation of the power assembly 620, improves installation efficiency, and ensures that the swing position and swing amplitude of the connecting frame 610 can smoothly switch the filter. Specifically, the other end of the positioning post 650 is interference-fitted with the connecting post 613, thereby determining the installation position of the connecting frame 610.

[0057] In one embodiment, the connecting hole 330 is an elongated hole, and the end of the connecting rod 611 is provided with a limiting rod 614, which is used to prevent the light-shielding plate 300 from disengaging from the connecting rod 611. Specifically, the limiting rod 614 is perpendicular to the connecting rod 611 and can pass smoothly through the elongated hole, so that the connecting rod 611 is inserted into the elongated hole. After the connecting frame 610 is installed, during the swinging process of the connecting frame 610, the extension direction of the limiting rod 614 has a certain intersection angle with the extension direction of the elongated hole, and the length of the limiting rod 614 is greater than the width of the elongated hole, thereby preventing the limiting rod 614 from automatically disengaging from the elongated hole, so as to ensure that the connecting rod 611 is always movably inserted into the elongated hole. In addition, the elongated hole also facilitates the drive design between the connecting frame 610 and the light-shielding plate 300, making it easier for the connecting frame 610 to drive the light-shielding plate 300 to slide.

[0058] This utility model also proposes a camera module, which includes a filter switching mechanism. The specific structure of the filter switching mechanism is as described in the above embodiments. Since this camera module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0059] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the inventive concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An optical filter switching mechanism characterized by comprising: include: Top cover; The lower cover is fastened to the upper cover, and the two together form a cavity. The lower cover is provided with a mounting groove that communicates with the cavity. Both the upper cover and the lower cover have windows that communicate with the cavity, and the two windows are arranged opposite to each other. A light-shielding sheet is disposed within the cavity, and the light-shielding sheet has a first opening and a second opening. A first filter opposite the first opening and a second filter opposite the second opening are attached to the light-shielding sheet. One end of the light-shielding sheet has a connecting hole. A drive mechanism is provided in the mounting slot. The drive mechanism includes a connecting frame and a power component. The power component is connected to the connecting frame and drives the connecting frame to reciprocate. One end of the connecting frame is provided with a connecting rod. The connecting rod is inserted into the connecting hole to drive the light-shielding sheet to slide in the cavity, thereby switching the first filter and the second filter to cover the window to allow light to pass through.

2. The filter switching mechanism according to claim 1, wherein The lower cover is provided with at least two first support rails, and the upper cover is provided with at least two second support rails. The extending directions of the first support rails and the second support rails are consistent with the sliding direction of the light-shielding sheet, and the light-shielding sheet slides along the first support rails and the second support rails.

3. A filter switching mechanism according to claim 1 or 2, wherein The side wall of the lower cover is provided with multiple sets of limiting protrusions. The multiple limiting protrusions are spaced apart along the sliding direction of the light shield, and the side edge of the light shield contacts the limiting protrusions to limit the displacement of the light shield from its sliding direction.

4. The filter switching mechanism according to claim 1, wherein The connecting frame is provided with a limiting post, which is used to contact the upper cover to limit the displacement of the connecting frame.

5. The filter switching mechanism according to claim 1, wherein The power assembly includes an iron core frame, a coil, and a magnetic component. A support platform is provided in the mounting slot. The iron core frame is fixedly mounted on the support platform. The coil is wound around the iron core frame. The iron core frame is also provided with a slot. The magnetic component is movably mounted in the slot. The coil is connected to a power source to generate a magnetic field to drive the magnetic component to rotate. The connecting frame is connected to the magnetic component.

6. The filter switching mechanism according to claim 5, wherein The connecting frame is provided with a connecting post, the magnetic component has a socket, and the connecting post is inserted into the socket and is interference-fitted with the socket.

7. The filter switching mechanism according to claim 6, wherein The side wall of the connecting column and the inner wall of the insertion hole are both provided with a limiting protrusion and a limiting groove, and the limiting protrusion and the limiting groove are adapted to each other.

8. The filter switching mechanism according to claim 6, wherein The power assembly is also provided with a positioning post, and the lower cover is provided with a positioning hole. One end of the positioning post is movably inserted into the positioning hole, and the positioning post is also fixedly connected to the connecting post.

9. The filter switching mechanism according to claim 1, wherein, The connecting hole is an elongated hole, and the end of the connecting rod is provided with a limiting rod, which is used to prevent the light-shielding sheet from separating from the connecting rod.

10. An image capture module, comprising: Includes the filter switching mechanism as described in any one of claims 1-9.

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