Flexible circuit board, optical zoom lens and electronic equipment

Abstract

The present invention provides a flexible circuit board, an optical zoom lens and an electronic device, wherein a movable frame is movably arranged relative to a fixed frame along a light transmission direction, so as to have a first working position close to the fixed frame and a second working position away from the fixed frame; the flexible circuit board has a first terminal for connecting to the fixed frame, a second terminal for connecting to the movable frame, and a main body section formed between the first terminal and the second terminal, when the movable frame is in the first working position, the main body section is bent to one side, so that the first terminal and the second terminal are arranged oppositely in a direction intersecting the light transmission direction, and when the movable frame is in the second working position, the main body section is arranged straight, so that the second terminal, the main body section and the first terminal are arranged in sequence along the light transmission direction. The solution provided by the present invention reduces the space occupied by the flexible circuit board when the lens is zoomed, reduces the volume of the lens, and improves the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of photographic equipment, and in particular to a flexible circuit board, an optical zoom lens and electronic equipment. Background Art

[0002] Optical zoom is produced by changing the position of the lens, the object and the focus. When the imaging plane moves in the horizontal direction, the viewing angle and focal length will change, and the farther the scene is, the clearer it is, giving people the feeling that the object is getting closer. Obviously, there are two ways to change the viewing angle. One is to change the focal length of the lens. In photography terms, this is optical zoom, that is, changing the relative position of each lens in the zoom lens to change the focal length of the lens.

[0003] Generally, an optical zoom lens includes a fixed frame and a movable frame. Lens groups are provided on the fixed frame and the movable frame respectively. The movable frame can move relative to the fixed frame to perform optical zoom. At the same time, the coil or position sensor of the optical zoom lens is installed on the zoom or focus group, that is, the movable frame. Therefore, a wiring structure is required to connect the coil or position sensor circuit on the movable frame to the interface at the outer end of the lens. However, the general wiring structure requires a large space when the optical zoom lens is zooming, which increases the size of the lens. In addition, the existing wiring structure has a short service life due to the reciprocating zoom of the lens. Summary of the invention

[0004] The main purpose of the present invention is to provide a flexible circuit board, an optical zoom lens and an electronic device, aiming to solve the problems of the existing wiring structure, that is, the space required for the optical zoom lens to zoom is large, which increases the size of the lens, and the existing wiring structure has a short service life due to the reciprocating zoom of the lens.

[0005] To achieve the above object, the present invention provides a flexible circuit board for an optical zoom lens, wherein the optical zoom lens comprises a fixed frame and a movable frame, wherein the movable frame is movably arranged relative to the fixed frame along a light transmission direction to have a first working position close to the fixed frame and a second working position away from the fixed frame;

[0006] The flexible circuit board has a first terminal for connecting to the fixed frame, a second terminal for connecting to the movable frame, and a main body section formed between the first terminal and the second terminal. When the movable frame is in the first working position, the main body section is bent to one side so that the first terminal and the second terminal are arranged opposite to each other in a direction intersecting the light transmission direction. When the movable frame is in the second working position, the main body section is straightly arranged so that the second terminal, the main body section and the first terminal are arranged in sequence along the light transmission direction.

[0007] Optionally, when the movable frame is in the first working position, the main body section is bent to have a first bending section and a second bending section arranged at an angle, and the angle α between the first bending section and the second bending section is greater than or equal to 90 degrees and less than or equal to 180 degrees.

[0008] Optionally, an angle α between the first bending section and the second bending section is greater than or equal to 110 degrees and less than or equal to 135 degrees.

[0009] Optionally, there is an arc-shaped segment between the first bending segment and the second bending segment.

[0010] Optionally, the main body segment has two first side surfaces and two second side surfaces, the area of ​​each of the first side surfaces is greater than the area of ​​each of the second side surfaces, and the first terminal is extended from one end of the main body segment in a normal direction to the second side surfaces.

[0011] Optionally, the second wiring terminal is used to be bent toward the moving frame to form a fixing portion, and the fixing portion is used to be connected to a light incident side or a light emitting side of the moving frame.

[0012] Optionally, a stress buffer is provided at the junction of the second terminal and the fixing portion.

[0013] Optionally, the main body segment includes a wiring layer and a resin layer, the wiring layer is covered with the resin layer, and the thickness of the resin layer is greater than or equal to 10 microns and less than or equal to 30 microns.

[0014] The present invention also provides an optical zoom lens, comprising:

[0015] The fixed frame is hollow;

[0016] a movable frame, movably mounted in the fixed frame and having a gap between the movable frame and the fixed frame; and

[0017] As described above, the flexible circuit board is arranged in the gap, and the first wiring terminal is connected to the fixed frame, and the second wiring terminal is connected to the movable frame.

[0018] In addition, the present invention also provides an electronic device, comprising the optical zoom lens as described above.

[0019] The flexible circuit board provided by the present invention is used for an optical zoom lens, wherein the optical zoom lens comprises a fixed frame and a movable frame, wherein the movable frame is movably arranged relative to the fixed frame along a light transmission direction, so as to have a first working position close to the fixed frame and a second working position away from the fixed frame; the flexible circuit board comprises a first terminal for connecting to the fixed frame, a second terminal for connecting to the movable frame, and a main body section formed between the first terminal and the second terminal, wherein when the movable frame is in the first working position, the main body section is bent to one side, so that the first terminal and the second terminal are arranged opposite to each other in a direction intersecting the light transmission direction, and when the movable frame is in the second working position, the main body section is arranged straight, so that the second terminal, the main body section and the first terminal are arranged in sequence along the light transmission direction.

[0020] Thus, when the movable frame is in the first working position, that is, the position close to the fixed frame, the main body section is bent to one side, so that the first terminal and the second terminal are arranged oppositely in the direction intersecting the light transmission direction. At this time, the flexible circuit board is bent, and the space occupied is small, which reduces the volume of the lens; when the movable frame is in the second working position, that is, the position away from the fixed frame, the main body section is straight, so that the second terminal, the main body section and the first terminal are arranged in sequence along the light transmission direction. At this time, the flexible circuit board is in a linear arrangement, and the stress is minimized. Usually, the optical zoom lens is in a non-working state for a long time, and when the optical zoom lens is in a non-working state, the movable frame is set away from the fixed frame, that is, in the second position, so the flexible circuit board is in a state of minimum stress for a long time, thereby achieving the effect of increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of a flexible circuit board of the present invention;

[0023] Figure 2 for Figure 1 A side view of a flexible circuit board;

[0024] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0025] Figure 4 is a schematic structural diagram of an embodiment of an optical zoom lens of the present invention;

[0026] Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure of the moving frame, flexible circuit board and guide rail.

[0027] Description of Figure Numbers:

[0028]

[0029]

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The coil or position sensor of the optical zoom lens is installed on the zoom or focus group, that is, the moving frame, so a wiring structure is needed to connect the coil or position sensor circuit on the moving frame to the interface at the outer end of the lens. However, the general wiring structure requires a large space when the optical zoom lens is zooming, which increases the size of the lens, and the existing wiring structure has a short service life due to the reciprocating zoom of the lens.

[0035] In view of this, the present invention provides a flexible circuit board, an optical zoom lens and an electronic device, aiming to solve the problems of the existing wiring structure, that is, the space required for the optical zoom lens to zoom is large, thereby increasing the size of the lens, and the existing wiring structure has a short service life due to the reciprocating zoom of the lens. Figures 1 to 4 This is an embodiment of a flexible circuit board, an optical zoom lens, and an electronic device provided by the present invention.

[0036] See also Figures 1 to 3 The flexible circuit board 100 provided by the present invention is used for an optical zoom lens 200, wherein the optical zoom lens 200 comprises a fixed frame 220 and a movable frame 210, wherein the movable frame 210 is movably arranged relative to the fixed frame 220 along the light transmission direction, so as to have a first working position close to the fixed frame 220 and a second working position away from the fixed frame 220; the flexible circuit board 100 comprises a first terminal 1 for connecting to the fixed frame 220, a second terminal 2 for connecting to the movable frame 210, and a main body section 3 formed between the first terminal 1 and the second terminal 2, when the movable frame 210 is in the first working position, the main body section 3 is bent to one side, so that the first terminal 1 and the second terminal 2 are arranged opposite to each other in a direction intersecting the light transmission direction, and when the movable frame 210 is in the second working position, the main body section 3 is arranged straight, so that the second terminal 2, the main body section 3 and the first terminal 1 are arranged in sequence along the light transmission direction.

[0037] Thus, when the moving frame 210 is in the first working position, that is, the position close to the fixed frame 220, the main body section 3 is bent to one side, so that the first terminal 1 and the second terminal 2 are arranged oppositely in the direction intersecting the light transmission direction. At this time, the flexible circuit board 100 is bent, and the space occupied is small, which reduces the volume of the lens; when the moving frame 210 is in the second working position, that is, the position away from the fixed frame 220, the main body section 3 is straight, so that the second terminal 2, the main body section 3 and the first terminal 1 are arranged in sequence along the light transmission direction. At this time, the flexible circuit board 100 is arranged in a straight line, and the stress is minimized. Usually, the optical zoom lens 200 is in a non-working state for a long time, and when the optical zoom lens 200 is in a non-working state, the moving frame 210 is set away from the fixed frame 220, that is, in the second position, so the flexible circuit board 100 is in a state of minimum stress for a long time, thereby achieving the effect of increasing the service life. It is understood that the optical zoom lens 200 generally includes the fixed frame 220 and the moving frame 210, and lens groups are respectively arranged on the fixed frame 220 and the moving frame 210, and the moving frame 210 can move relative to the fixed frame 220 through the guide rail 230 to perform optical zoom. In addition, the light transmission direction is the direction in which the moving frame 210 approaches the fixed frame 220.

[0038] Furthermore, the bending degree of the main body section 3 is not limited, as long as the first terminal 1 and the second terminal 2 can be arranged relative to each other in the direction intersecting the light transmission direction. In this embodiment, when the movable frame 210 is in the first working position, the main body section 3 is bent to have a first bending section 31 and a second bending section 32 arranged at an angle, and an angle α is formed between the first bending section 31 and the second bending section 32. When the angle α is too large, the stress at the junction of the first bending section 31 and the second bending section 32 is too large, which reduces the service life of the flexible circuit board 100; when the angle α is too small, it is not convenient for the movable frame 210 to move relative to the fixed frame 220; and when the angle α is greater than or equal to 90 degrees and less than or equal to 180 degrees, it is convenient for the movable frame 210 to move relative to the fixed frame 220, and at the same time, the stress at the junction of the first bending section and the second bending section 32 is reduced. Preferably, the angle α is greater than or equal to 110 degrees and less than or equal to 135 degrees. It is understandable that when the moving frame 210 is in the second working position, the first bending segment 31 and the second bending segment 32 are arranged in a straight line, and the angle α between the first bending segment 31 and the second bending segment 32 is 0 degrees; and when the moving frame 210 moves from the second working position to the first working position, the angle α between the first bending segment 31 and the second bending segment 32 increases from 0 degrees to 180 degrees.

[0039] Furthermore, there is an arc segment 33 disposed in an arc shape between the first bending segment 31 and the second bending segment 32. The arc segment 33 is disposed so that the first terminal 1, the main body segment 3 and the second terminal 2 move more smoothly with the movement of the moving frame 210. In addition, the arc segment 33 can also reduce the intersection stress between the first bending segment 31 and the second bending segment 32. It can be understood that the connection form of the first bending segment 31, the arc segment 33 and the second bending segment 32 is not limited. In this embodiment, the first bending segment 31, the arc segment 33 and the second bending segment 32 are disposed integrally.

[0040] Furthermore, in order to improve the connection strength between the flexible circuit board 100 and the fixing frame 220, the main body section 3 has two first side surfaces 3a and two second side surfaces 3b, the area of ​​each first side surface 3a is larger than the area of ​​each second side surface 3b, and the first terminal 1 is extended from one end of the main body section 3 to the normal direction of the second side surface 3b. In this way, the connection area between the flexible circuit board 100 and the fixing frame 220 is increased, and the connection strength is improved. When installing, the first terminal 1 is fixedly connected to the fixing frame 220, and the first terminal 1 can be directly connected to the interface at the outer end of the lens as a lead. In addition, since the first terminal 1 is coplanar with the first side surface 3a, the space occupied by the flexible circuit board 100 is further reduced.

[0041] For further information, see Figures 2 to 4 , the second terminal 2 is used to bend toward the moving frame 210 to form a fixing portion 21, and the fixing portion 21 is used to be connected to the light incident side or the light emitting side of the moving frame 210. It should be noted that the moving frame 210 has the light incident side and the light emitting side in the light transmission direction. The fixing portion 21 is connected to the light incident side or the light emitting side, so that the connection position of the flexible circuit board 100 and the moving frame 210 is set at the light incident side or the light emitting side, thereby achieving a space saving effect. In addition, the fixing portion 21 can also be widened to increase the connection area with the moving frame 210 and improve the connection strength.

[0042] Specifically, since the fixed portion 21 and the second terminal 2 are bent, when the movable frame 210 moves, there is a large stress at the junction of the fixed portion 21 and the second terminal 2. Therefore, a stress buffer is provided at the junction of the second terminal 2 and the fixed portion 21 to relieve the stress at the junction of the fixed portion 21 and the second terminal 2 and improve the service life of the flexible circuit board 100. It should be noted that the form of the stress buffer is not limited, and it can be a resin layer, flexible PVC, or other forms. In this embodiment, the stress buffer is an adhesive, and the fixed portion 21 can be bonded to the movable frame 210 by the adhesive, and the adhesive is applied to the junction of the fixed portion 21 and the second terminal 2 to relieve stress.

[0043] Furthermore, the main body section 3 includes a wiring layer and a resin layer, and the surface of the wiring layer is covered with the resin layer. Electrical connection is achieved through the wiring layer, and the resin layer allows the flexible circuit board 100 to be bent and set, while achieving insulation. When the thickness of the resin layer is too small, the insulation reliability of the flexible circuit board 100 will be reduced; when the thickness of the resin layer is too large, it will affect the bending performance of the flexible circuit board 100, making it inconvenient for the moving frame 210 to move. When the thickness of the resin layer is greater than or equal to 10 microns and less than or equal to 30 microns, the insulation reliability and bending performance of the flexible circuit board 100 are guaranteed at the same time.

[0044] The present invention also provides an optical zoom lens 200, comprising a fixed frame 220, a moving frame 210 and the above-mentioned flexible circuit board 100, wherein the fixed frame 220 is hollow, the moving frame 210 is movably mounted in the fixed frame 220, and there is a gap between the moving frame 210 and the fixed frame 220; the flexible circuit board 100 is arranged in the gap, and the first terminal 1 is connected to the fixed frame 220, and the second terminal 2 is connected to the moving frame 210. By arranging the flexible circuit board 100 in the gap, the space utilization rate of the optical zoom lens 200 is improved, and the volume is reduced. At the same time, when the moving frame 210 drives the flexible circuit board 100, due to the soft performance of the flexible circuit board 100, the noise generated when the first terminal 1 contacts the second terminal 2 and the flexible circuit board 100 contacts the moving frame 210 and / or the fixed frame 220 can be reduced, so as to achieve the effect of noise reduction, thereby improving the user experience. It can be understood that the gap may be a size gap between the movable frame 210 and the fixed frame 220 , or may be an adaptation gap provided for installing the flexible circuit board 100 .

[0045] The working conditions of the optical zoom lens 200 are roughly as follows:

[0046] When the moving frame 210 is in the first working position, that is, the position close to the fixed frame 220, the main body section 3 is bent to one side, so that the first terminal 1 and the second terminal 2 are arranged opposite to each other in the direction intersecting the light transmission direction. At this time, the flexible circuit board 100 is bent and occupies less space. In addition, the flexible circuit board 100 is arranged in the gap between the moving frame 210 and the fixed frame 220, so as to further reduce the occupied space without affecting the normal operation of the optical zoom lens 200;

[0047] When the movable frame 210 is in the second working position, i.e., away from the fixed frame 220, the main body section 3 is arranged in a straight line, so that the second terminal 2, the main body section 3 and the first terminal 1 are arranged in sequence along the light transmission direction. At this time, the flexible circuit board 100 is arranged in a straight line, so the stress is minimal. Usually, the optical zoom lens 200 is in a non-working state for a long time, and when the optical zoom lens 200 is in a non-working state, the movable frame 210 is arranged away from the fixed frame 220, i.e., in the second position, so the flexible circuit board 100 is in a state of minimum stress for a long time, thereby achieving the effect of increasing the service life.

[0048] In addition, the present invention also provides an electronic device, comprising the optical zoom lens 200 as described above.

[0049] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flexible circuit board for an optical zoom lens, the optical zoom lens comprising a fixed frame and a movable frame, the movable frame being movably arranged relative to the fixed frame along a light transmission direction to have a first working position close to the fixed frame and a second working position away from the fixed frame, characterized in that: The flexible circuit board has a first terminal for connecting to the fixed frame, a second terminal for connecting to the movable frame, and a main body section formed between the first terminal and the second terminal. When the movable frame is in the first working position, the main body section is bent to one side so that the first terminal and the second terminal are arranged opposite to each other in a direction intersecting the light transmission direction. When the movable frame is in the second working position, the main body section is straight so that the second terminal, the main body section and the first terminal are arranged in sequence along the light transmission direction. Wherein, when the movable frame is in the first working position, the main body section is bent to have a first bending section and a second bending section set at an angle, and the angle α between the first bending section and the second bending section is greater than or equal to 110 degrees and less than or equal to 135 degrees.

2. The flexible circuit board according to claim 1, characterized in that: An arc segment arranged in an arc shape is provided between the first bending segment and the second bending segment.

3. The flexible circuit board according to claim 1, characterized in that: The main body segment has two first side surfaces and two second side surfaces, the area of ​​each first side surface is larger than the area of ​​each second side surface, and the first terminal is extended from one end of the main body segment toward the normal direction of the second side surface.

4. The flexible circuit board according to claim 1, characterized in that: The second connection terminal is used to be bent toward the moving frame to form a fixing portion, and the fixing portion is used to be connected to the light incident side or the light emitting side of the moving frame.

5. The flexible circuit board according to claim 4, characterized in that: A stress buffer is provided at the junction of the second wiring terminal and the fixing portion.

6. The flexible circuit board according to claim 1, characterized in that: The main body section includes a wiring layer and a resin layer. The surface of the wiring layer is covered with the resin layer. The thickness of the resin layer is greater than or equal to 10 microns and less than or equal to 30 microns.

7. An optical zoom lens, characterized in that: include: The fixed frame is hollow; a movable frame, movably mounted in the fixed frame and having a gap between the movable frame and the fixed frame; and The flexible circuit board according to any one of claims 1 to 6, wherein the flexible circuit board is arranged in the gap, and the first terminal is connected to the fixed frame, and the second terminal is connected to the movable frame.

8. An electronic device, characterized in that: Comprising an optical zoom lens as claimed in claim 7.

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