Aperture driving apparatus, camera apparatus, and electronic device

Abstract

The present invention provides an aperture driving apparatus, a camera apparatus, and an electronic device. The aperture driving apparatus comprises: a base assembly, the base assembly having an accommodating cavity; a rotating body, at least a part of the rotating body being movably arranged in the accommodating cavity, a circumferential outer side wall of the rotating body being provided with a driving slot extending in the circumferential direction, and two ends of the driving slot in the length direction having a height difference in the axial direction of the rotating body; a spring assembly, at least a part of the spring assembly being arranged on the base assembly, and at least a part of the spring assembly being compressible along the axial direction of the rotating body; an abutting assembly, the spring assembly being drivingly connected to the abutting assembly and driving the abutting assembly to move along the axial direction of the rotating body, the abutting assembly having an abutting end, and at least a part of the abutting end extending into the driving slot and driving the rotating body to rotate; and a plurality of aperture blades, the plurality of aperture blades being arranged around the circumferential direction of the rotating body. The present invention solves the problem in the prior art of poor performance of aperture drive motors.

Description

Aperture driving device, camera device and electronic device TECHNICAL FIELD

[0001] The present application relates to the field of camera devices, in particular to an aperture driving device, a camera device and an electronic device.

[0002] BACKGROUND

[0003] The aperture size of a mobile phone camera is an important factor affecting the shooting effect. A large-aperture camera has a large aperture size, so that more light can enter the camera module, shortening the shutter time, suitable for shooting moving objects, and the depth of field is shallow, which can also be used in scenes such as blurring the background and highlighting the subject. A small-aperture camera has a long shutter time, suitable for shooting tracks and star tracks, and the depth of field is deep, ensuring the clarity of objects within the multi-depth range. The current variable aperture mainly drives the movement of the blade through the voice coil motor (VCM) to adjust the aperture size, which has a complex structure and is difficult to assemble. In addition, the voice coil motor is easily affected by electromagnetic interference, resulting in poor aperture adjustment accuracy of the aperture hole of the variable aperture.

[0004] Therefore, there is a problem of poor performance of the aperture driving motor in the prior art.

[0005] SUMMARY

[0006] The main purpose of the present application is to provide an aperture driving device, a camera device and an electronic device to solve the problem of poor performance of the aperture driving motor in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an aperture driving device is provided, comprising: a base assembly having a receiving cavity; a rotating body, at least a part of the rotating body is movably arranged in the receiving cavity, and the circumferential outer side wall of the rotating body has a driving groove extending in the circumferential direction, the two ends of the driving groove in the length direction have a height difference in the axial direction of the rotating body; a spring assembly, at least a part of the spring assembly is arranged on the base assembly, and at least a part of the spring assembly can be compressed in the axial direction of the rotating body; an abutting assembly, the spring assembly is drivingly connected with the abutting assembly and drives the abutting assembly to move in the axial direction of the rotating body, the abutting assembly has an abutting end, at least a part of the abutting end extends into the driving groove and drives the rotating body to rotate; a plurality of aperture blades, the plurality of aperture blades are arranged around the circumferential direction of the rotating body, the aperture blades are respectively connected with the base assembly and the rotating body, and the aperture blades can rotate together with the rotating body relative to the base assembly.

[0008] Further, the spring assembly comprises: an SMA wire spring, the SMA wire spring is compressed along the axial direction of the rotating body after being energized; a transmission structure, the SMA wire spring is electrically connected with the transmission structure, the abutting assembly is connected with the transmission structure, and the part of the transmission structure connected with the abutting assembly moves along the axial direction of the rotating body with the SMA wire spring.

[0009] Further, the transmission structure comprises: an upper pressing piece, the abutting assembly is connected with the upper pressing piece; and a lower pressing piece, the SMA wire spring is electrically connected with the upper pressing piece and the lower pressing piece respectively, and the upper pressing piece and the lower pressing piece are arranged at intervals in the axial direction of the rotating body.

[0010] Further, the transmission structure further comprises a spring piece and a welding end foot, one end of the spring piece is connected with the end of the upper pressing piece away from the SMA wire spring, and the other end of the spring piece is connected with the welding end foot.

[0011] Further, the transmission structure further comprises a positioning column, the positioning column is close to the rotating body relative to the upper pressing piece and the lower pressing piece in the radial direction of the rotating body, and the abutting assembly is sleeved on the positioning column and can slide along the axial direction of the positioning column.

[0012] Further, the transmission structure further comprises: a mounting block, the mounting block is arranged on the circumferential side wall of the base assembly, and the two ends of the positioning column are connected with the mounting block respectively; and a return spring, the return spring is sleeved on the positioning column, one end of the return spring is connected with the abutting assembly, and the other end of the return spring is abutted with the mounting block.

[0013] Further, the SMA wire spring is electrically connected with the end of the upper pressing piece away from the positioning column and the end of the lower pressing piece away from the positioning column respectively, the upper pressing piece and the lower pressing piece are correspondingly provided with bending structures in the length direction, the end of the upper pressing piece connected with the SMA wire spring is close to the rotating body relative to the end of the upper pressing piece connected with the positioning column, and the end of the lower pressing piece connected with the SMA wire spring is close to the rotating body relative to the end of the lower pressing piece connected with the positioning column.

[0014] Further, the abutting assembly comprises: a mounting seat, the mounting seat has a mounting cavity, the mounting seat is connected with the transmission structure, and the end of the mounting seat away from the transmission structure has a mounting hole communicating with the mounting cavity; and a thimble, one end of the thimble is located in the mounting cavity, and the other end of the thimble is an abutting end and extends out of the mounting cavity from the mounting hole.

[0015] Further, the abutting assembly further comprises an abutting spring arranged in the mounting cavity, one end of the abutting spring is abutted with the mounting seat, and the other end of the abutting spring is abutted with the thimble.

[0016] Further, the aperture driving device further comprises a gear assembly, the gear assembly is arranged on the circumferential inner side wall of the base assembly opposite to the spring assembly, and the circumferential outer side wall of the rotating body has a gear rack matched with the gear assembly.

[0017] Further, the axial direction of the gear assembly is parallel to the axial direction of the rotating body.

[0018] Further, the aperture driving device further comprises at least two rollers, the two rollers are arranged on both sides of the gear assembly around the circumferential inner side wall of the base assembly, and the axial inner side wall of the base assembly is provided with different mounting grooves corresponding to different rollers.

[0019] Further, the two rollers are symmetrically arranged about the gear assembly; and / or the distance from the roller to the gear assembly is less than the distance from the roller to the spring assembly.

[0020] Further, the aperture driving device further comprises a plurality of balls, the balls are arranged between the bottom surface of the rotating body and the bottom surface of the base assembly, and the rotating body and the base assembly are respectively provided with ball grooves corresponding to the balls; and / or the bottom surface of the base assembly has at least one limiting protrusion, and the bottom surface of the rotating body is provided with a limiting groove extending along the circumferential direction of the rotating body corresponding to the limiting protrusion.

[0021] Further, the circumferential side wall of the base assembly is provided with an avoiding opening for accommodating the spring assembly, and the aperture driving device further comprises a protective cover plate covering the avoiding opening.

[0022] According to another aspect of the present application, there is provided a camera device comprising the aperture driving device described above.

[0023] According to another aspect of the present application, there is provided an electronic device comprising the camera device described above.

[0024] According to the technical scheme of the present application, the aperture driving device in the present application comprises a base assembly, a rotating body, a spring assembly, an abutting assembly and a plurality of aperture blades. The base assembly has an accommodating cavity; at least a part of the rotating body is movably arranged in the accommodating cavity, the circumferential outer side wall of the rotating body has a driving groove extending along the circumferential direction, and the two ends of the driving groove in the length direction have a height difference in the axial direction of the rotating body; at least a part of the spring assembly is arranged on the base assembly, and at least a part of the spring assembly can be compressed in the axial direction of the rotating body; the spring assembly is drivingly connected with the abutting assembly and drives the abutting assembly to move in the axial direction of the rotating body, the abutting assembly has an abutting end, at least a part of the abutting end extends into the driving groove and drives the rotating body to rotate; the plurality of aperture blades are arranged around the circumferential direction of the rotating body, the aperture blades are respectively connected with the base assembly and the rotating body, and the aperture blades can rotate together with the rotating body relative to the base assembly.

[0025] When the aperture driving device in the present application is used, since the aperture driving device in the present application has a spring assembly and an abutting assembly in driving connection with the spring assembly, and the spring assembly can be compressed in the axial direction of the rotating body, when the spring assembly switches between compression and reset, the spring assembly can drive the abutting assembly to move in the axial direction of the rotating body. At the same time, since the rotating body has a driving groove matched with the abutting segment of the abutting assembly, and the two ends of the length direction of the driving groove have height difference in the axial direction of the rotating body, when the abutting assembly is driven by the spring assembly, the abutting end of the abutting assembly and the driving groove can produce relative movement under the driving action of the spring assembly, that is, the rotating body rotates relative to the abutting end. And with the switching of the spring assembly between the compression and reset state, the abutting end can be lifted or lowered in the axial direction of the rotating body, so as to realize the forward rotation or reverse rotation of the rotating body, and then realize the rotation of the rotating body to drive the aperture blade to rotate to realize the adjustment of the aperture size. Therefore, the spring assembly and the abutting assembly in the present application replace the voice coil motor in the aperture driving device in the prior art, so compared with the prior art, the structure of the aperture driving device in the present application is simpler and will not be affected by electromagnetic interference. Therefore, the aperture driving device in the present application effectively solves the poor use performance problem of the aperture driving motor in the prior art.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of the present description, illustrate the present application and together with the written description serve to explain the application. In the drawings:

[0028] Fig. 1 shows a structural schematic diagram of an aperture driving device according to one specific embodiment of the present application;

[0029] Fig. 2 shows an exploded view of the aperture driving device in Fig. 1;

[0030] Fig. 3 shows a top view of the aperture driving device in Fig. 1 after removing the top cover;

[0031] Fig. 4 shows a schematic diagram of the position relationship of the rotating body, the spring assembly and the abutting assembly of the aperture driving device in Fig. 1;

[0032] Fig. 5 shows a schematic diagram of the position relationship between the rotating body, the gear assembly and the roller shaft of the aperture driving device in Fig. 1;

[0033] Fig. 6 shows a structural schematic diagram of the spring assembly of the aperture driving device in Fig. 1;

[0034] Fig. 7 shows a schematic diagram of the position relationship between the spring assembly and the abutting assembly of the aperture driving device in Fig. 1;

[0035] Figure 8 shows the positional relationship of the base assembly, gear assembly, spring assembly and ball of the aperture driving device in Figure 1.

[0036] Wherein, the above-mentioned drawings include the following reference signs:

[0037] 10, base assembly; 11, mounting groove; 12, limiting protrusion; 13, avoiding opening; 20, rotating body; 21, driving groove; 22, rack; 23, limiting groove; 30, spring assembly; 31, SMA wire spring; 32, transmission structure; 321, upper pressing piece; 322, lower pressing piece; 323, elastic piece; 324, welding end foot; 325, positioning column; 326, mounting block; 327, reset spring; 33, bending structure; 40, abutting assembly; 41, abutting end; 42, mounting seat; 43, thimble; 50, aperture blade; 60, gear assembly; 70, roller; 80, ball; 81, ball groove; 90, protective cover plate; 100, top cover; 200, gasket.

[0038] DETAILED DESCRIPTION

[0039] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0041] In the present application, unless otherwise specified, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0042] In order to solve the problem of poor performance of aperture driving motor in the prior art, the present application provides an aperture driving device, a camera device and an electronic equipment.

[0043] Moreover, the camera device in the present application has the aperture driving device described below. Meanwhile, the electronic equipment in the present application can be a mobile terminal such as mobile phone, notebook computer, tablet computer, etc. having the camera device.

[0044] As shown in FIGS. 1-8, the aperture driving device in the present application comprises a base assembly 10, a rotating body 20, a spring assembly 30, an abutting assembly 40, and a plurality of aperture blades 50. The base assembly 10 has a receiving cavity; at least a part of the rotating body 20 is movably arranged in the receiving cavity, and the circumferential outer wall of the rotating body 20 has a driving groove 21 extending in the circumferential direction, the two ends of the driving groove 21 in the length direction have a height difference in the axial direction of the rotating body 20; at least a part of the spring assembly 30 is arranged on the base assembly 10, and at least a part of the spring assembly 30 can be compressed in the axial direction of the rotating body 20; the spring assembly 30 is drivingly connected with the abutting assembly 40 and drives the abutting assembly 40 to move in the axial direction of the rotating body 20, and the abutting assembly 40 has an abutting end 41, at least a part of the abutting end 41 extends into the driving groove 21 and drives the rotating body 20 to rotate; the plurality of aperture blades 50 are arranged around the circumferential direction of the rotating body 20, and the aperture blades 50 are respectively connected with the base assembly 10 and the rotating body 20, and the aperture blades 50 can rotate together with the rotating body 20 relative to the base assembly 10.

[0045] When the aperture driving device in the present application is used, since the aperture driving device in the present application has the spring assembly 30 and the abutting assembly 40 drivingly connected with the spring assembly 30, and the spring assembly 30 can be compressed in the axial direction of the rotating body 20, when the spring assembly 30 switches between compression and reset, the spring assembly 30 can drive the abutting assembly 40 to move in the axial direction of the rotating body 20. At the same time, since the rotating body 20 has the driving groove 21 matched with the abutting section of the abutting assembly 40, and the two ends of the driving groove 21 in the length direction have a height difference in the axial direction of the rotating body 20, when the abutting assembly 40 is driven by the spring assembly 30, the relative movement between the abutting end 41 of the abutting assembly 40 and the driving groove 21 can be generated under the driving action of the spring assembly 30, that is, the rotating body 20 rotates relative to the abutting end 41. And with the switching of the spring assembly 30 between the compression and reset states, the rising or falling of the abutting end 41 in the axial direction of the rotating body 20 can be realized, so that the forward rotation or reverse rotation of the rotating body 20 can be realized, and then the rotating body 20 drives the aperture blades 50 to rotate to realize the adjustment of the aperture size. Therefore, the spring assembly 30 and the abutting assembly 40 in the present application replace the voice coil motor in the aperture driving device in the prior art, so compared with the prior art, the structure of the aperture driving device in the present application is simpler and will not be affected by electromagnetic interference. Therefore, the aperture driving device in the present application effectively solves the problem of poor use performance of the aperture driving motor in the prior art.

[0046] It should be noted that the axial direction of the rotating body 20 is parallel to the optical axis direction of the lens of the camera in the present application. Moreover, the present application mainly improves the power part of the aperture motor, and therefore the structure of the aperture blade 50 and the arrangement mode of the aperture blade 50 belong to the prior art and will not be described again. Of course, the aperture driving device in the present application also includes the top cover 100 and the gasket 200, the top cover 100 is located above the aperture blade 50 and covers the base assembly 10, and the gasket 200 is arranged between the aperture blade 50 and the rotating body 20.

[0047] Moreover, it should be noted that the height of the driving groove 21 can gradually decrease from the end with a higher height to the end with a lower height in the length direction of the driving groove 21 in the present application, or in other words, the height of the driving groove 21 in the axial direction of the rotating body 20 gradually decreases or gradually increases from one end to the other end in the length direction. Moreover, in order to ensure that the movement of the rotating body 20 is smoother, the extension route of the driving groove 21 can be a curve, or in other words, the driving groove 21 is a curved groove.

[0048] Of course, according to the actual use driving, the driving groove 21 can also be arranged in a multi-segment structure and there is a height difference between the two adjacent ends, so that the abutting end 41 can enter different segments of the driving groove 21 in the process of up-down movement, and then the clockwise rotation and the counterclockwise rotation of the rotating body 20 are realized.

[0049] Meanwhile, in an embodiment not shown in the present application, the two ends in the length direction of the driving groove 21 can also have the same height, and in this case, the height of the driving groove 21 can first decrease and then increase or first increase and then decrease in the process of extending from one end to the other end of the driving groove 21, or in other words, the driving groove 21 at this time can be regarded as being composed of at least one semicircular segment, so that the clockwise rotation and the counterclockwise rotation of the rotating body 20 can also be realized through the matching of the abutting end 41 and the driving groove 21 at this time.

[0050] As can be seen from the above description, the specific shape of the driving groove 21 can be improved according to the actual design requirements in the present application, as long as the clockwise rotation and the counterclockwise rotation of the rotating body 20 can be ensured.

[0051] Specifically, the spring assembly 30 comprises an SMA wire spring 31 compressed along the axial direction of the rotating body 20 after being electrified and a transmission structure 32. The SMA wire spring 31 is electrically connected with the transmission structure 32. The abutting assembly 40 is connected with the transmission structure 32, and the part of the transmission structure 32 connected with the abutting assembly 40 moves along the axial direction of the rotating body 20 with the SMA wire spring 31. By setting the transmission structure 32, the SMA wire spring 31 can be electrically conducted, so that the SMA wire spring 31 can be compressed after being electrified, and the SMA wire spring 31 can be reset after being de-energized, so as to realize the up and down movement of the abutting end 41 of the abutting assembly 40 in the axial direction of the rotating body 20. At the same time, the transmission structure 32 set in the present application can also limit the abutting assembly 40, so as to ensure that the abutting assembly 40 can only move in the axial direction of the rotating body 20, thereby realizing the rotation of the rotating body 20 under the cooperation of the abutting end 41 and the driving groove 21.

[0052] Specifically, the transmission structure 32 comprises an upper pressing piece 321 and a lower pressing piece 322. The abutting assembly 40 is connected with the upper pressing piece 321. The SMA wire spring 31 is electrically connected with the upper pressing piece 321 and the lower pressing piece 322 respectively, and the upper pressing piece 321 and the lower pressing piece 322 are arranged at intervals in the axial direction of the rotating body 20. By setting the upper pressing piece 321 and the lower pressing piece 322, the short circuit of the SMA wire spring 31 can be effectively avoided, and in the actual movement process, the SMA wire drives the upper pressing piece 321 to move, thereby driving the abutting end 41 of the abutting assembly 40 to move. Of course, in the present application, according to different actual design requirements, the SMA wire spring 31 can also drive the lower pressing piece 322 to move, and at this time the abutting assembly 40 is connected with the lower pressing piece 322.

[0053] Optionally, the transmission structure 32 further comprises an elastic piece 323 and a welding end foot 324. One end of the elastic piece 323 is connected with the end of the upper pressing piece 321 away from the SMA wire spring 31, and the other end of the elastic piece 323 is connected with the welding end foot 324. By setting in this way, during the movement of the upper pressing piece 321 driven by the SMA wire spring 31, since the upper pressing piece 321 is connected with the welding end foot 324 through the elastic piece 323, the deformation of the elastic piece 323 can ensure that the upper pressing piece 321 can always be electrically connected with the welding end foot 324 and the SMA wire spring 31, thereby ensuring the use performance and stability of the aperture driving device.

[0054] Of course, in the present application, the lower pressing piece can also be connected with different welding end feet, or the elastic piece and the lower pressing piece are respectively connected with different welding end feet.

[0055] Preferably, the transmission structure 32 further comprises a positioning column 325, the positioning column 325 is close to the rotating body 20 in the radial direction of the rotating body 20 relative to the upper pressing sheet 321 and the lower pressing sheet 322, and the abutting assembly 40 is sleeved on the positioning column 325 and can slide along the axial direction of the positioning column 325. By arranging the positioning column 325, the movement of the abutting assembly 40 can be further limited, that is, it is ensured that the abutting assembly 40 can only move along the axial direction of the positioning column 325, so that the driving accuracy of the aperture driving device is ensured. Further preferably, the axial direction of the positioning column 325 is parallel to the compression direction of the SMA wire spring 31.

[0056] Specifically, the transmission structure 32 further comprises a mounting block 326 and a reset spring 327, the mounting block 326 is arranged on the circumferential side wall of the base assembly 10, and both ends of the positioning column 325 are connected with the mounting block 326 respectively; the reset spring 327 is sleeved on the positioning column 325, one end of the reset spring 327 is connected with the abutting assembly 40, and the other end of the reset spring 327 abuts against the mounting block 326. By arranging the mounting block 326, the stability of the upper pressing sheet 321, the lower pressing sheet 322 and the SMA wire spring 31 can be effectively ensured, and the transmission structure 32 can be more easily mounted on the base assembly 10. By arranging the reset spring 327, not only can the reset force be provided for the abutting assembly 40 after the SMA wire spring 31 is powered off, but also the abutting assembly 40 can be supported to some extent, so that the stability of the abutting assembly 40 is ensured.

[0057] Optionally, the SMA wire spring 31 is electrically connected with one end of the upper pressing sheet 321 away from the positioning column 325 and one end of the lower pressing sheet 322 away from the positioning column 325 respectively, and the upper pressing sheet 321 and the lower pressing sheet 322 are respectively provided with a bending structure 33 corresponding in the length direction, one end of the upper pressing sheet 321 connected with the SMA wire spring 31 is close to the rotating body 20 relative to one end of the upper pressing sheet 321 connected with the positioning column 325, and one end of the lower pressing sheet 322 connected with the SMA wire spring 31 is close to the rotating body 20 relative to one end of the lower pressing sheet 322 connected with the positioning column 325. By arranging in this way, the SMA wire spring 31 can be effectively avoided from protruding outwardly from the circumferential side wall of the base assembly 10, so that the internal structure of the aperture driving device is more compact.

[0058] In one specific embodiment of the present application, the abutting assembly 40 comprises a mounting base 42 and a needle 43, the mounting base 42 has a mounting cavity, the mounting base 42 is connected with the transmission structure 32, and the end of the mounting base 42 away from the transmission structure 32 has a mounting hole communicating with the mounting cavity; one end of the needle 43 is located in the mounting cavity, and the other end of the needle 43 is the abutting end 41 and extends out of the mounting cavity through the mounting hole. Preferably, the abutting assembly 40 further comprises an abutting spring arranged in the mounting cavity, one end of the abutting spring abuts against the mounting base 42, and the other end of the abutting spring abuts against the needle 43. By arranging the abutting spring, it can be ensured that the abutting end 41 of the needle 43 can always abut against the driving groove 21, thereby ensuring the use performance of the aperture driving device. Moreover, since the aperture driving device in the present application further comprises a gear assembly 60, the gear assembly 60 is arranged on the circumferential inner side wall of the base assembly 10 opposite to the spring assembly 30, and the circumferential outer side wall of the rotating body 20 has a gear rack 22 cooperating with the gear assembly 60. Therefore, at this time, the abutting spring can abut against the rotating body 20 through the abutting end 41 of the needle 43, thereby ensuring that the gear rack 22 on the rotating body 20 is engaged with the gear assembly 60. During the rotation of the rotating body 20, different teeth of the gear assembly 60 and the gear rack 22 are engaged, thereby effectively ensuring the stability of the rotation of the rotating body 20. At the same time, the cooperation of the gear assembly 60 and the gear rack 22 can also realize the limiting effect of the rotating body 20 in the axial direction, thereby avoiding the deflection of the rotating body 20 in the axial direction, i.e., ensuring that the axial direction of the rotating body 20 is always parallel to the optical axis direction.

[0059] Optionally, the mounting base 42 can comprise a needle sleeve and a body part, and the needle sleeve is arranged inside the body part, and the body part is sleeved on the positioning column 325. Meanwhile, one end of the needle 43 is arranged inside the needle sleeve, and the other end extends out through the mounting hole of the needle sleeve. The needle sleeve and the body part can also be fixed through dispensing. In order to ensure the stability between the abutting spring and the needle 43, at least a part of the abutting spring can be sleeved on the needle 43, and the circumferential outer side wall of the needle 43 has an annular protrusion for abutting against the abutting spring.

[0060] Preferably, the aperture driving device further comprises at least two rollers 70, the two rollers 70 are arranged on both sides of the gear assembly 60 around the circumferential inner side wall of the base assembly 10, and the axial inner side wall of the base assembly 10 is provided with different mounting grooves 11 corresponding to different rollers 70. Since there is a gap between the rotating body 20 and the circumferential inner side wall of the base assembly 10 in the actual assembly process, the lateral distance between the rotating body 20 and the base assembly 10 can be effectively reduced by arranging the rollers 70. Further preferably, the two rollers 70 are symmetrically arranged about the gear assembly 60; and the distance from the roller 70 to the gear assembly 60 is less than the distance from the roller 70 to the spring assembly 30.

[0061] And, in the embodiment, the axis direction of the rotating shaft extends along the Z axis direction, and the line connecting the spring assembly 30 and the gear assembly 60 can be regarded as approximately parallel to the X axis. And the line connecting the two rollers 70 can be regarded as approximately parallel to the Y axis. Therefore, the abutting action of the ejector pin 43 on the rotating body 20 can also prevent the rotating body 20 from being deflected and overturned in the X axis direction. And the action of the two rollers 70 can prevent the rotating body 20 from being deflected and overturned in the Y axis direction. And the setting of the gear assembly 60 and the gear rack 22 can prevent the rotating body 20 from shaking in the XY plane.

[0062] Optionally, the axis direction of the gear assembly 60 is parallel to the axis direction of the rotating body 20.

[0063] Optionally, the aperture driving device further comprises a plurality of balls 80, the balls 80 are arranged between the bottom surface of the rotating body 20 and the bottom surface of the base assembly 10, and the rotating body 20 and the base assembly 10 are respectively provided with ball grooves 81 corresponding to the balls 80; and / or the bottom surface of the base assembly 10 is provided with at least one limiting protrusion 12, and the bottom surface of the rotating body 20 is provided with a limiting groove 23 extending along the circumferential direction of the rotating body 20 corresponding to the limiting protrusion 12. Through such a setting, when the rotating body 20 rotates relative to the base assembly 10, the friction between the base assembly 10 and the rotating body 20 can be effectively reduced, so that the aperture driving device can more sensitively adjust the aperture size.

[0064] Optionally, the circumferential side wall of the base assembly 10 is provided with a avoiding opening 13 for accommodating the spring assembly 30, and the aperture driving device further comprises a protective cover plate 90, which is arranged on the avoiding opening 13. Through the setting of the avoiding opening 13, accommodation space can be provided for the spring assembly 30, so that the internal structure of the aperture driving device is more compact, thereby facilitating the miniaturization design. And through the setting of the protective cover plate 90, the spring assembly 30 can be protected to a certain extent. And in the present application, the protective cover plate 90 is arranged on the avoiding opening 13 from the outside of the base assembly 10.

[0065] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0066] 1. Effectively solve the problem of poor use performance of the aperture driving motor in the prior art;

[0067] 2. Simple structure and stable performance.

[0068] Obviously, the above-described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0069] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, as the scope of the exemplary embodiments of this application is limited only by the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Also, unless otherwise indicated herein, the materials described herein can be used in a variety of applications.

[0070] It should be noted that the terms "first", "second", and the like, as used herein, are intended to modify any one of the identified objects, but do not imply a specific order or sequence, unless otherwise specifically indicated. It is to be understood that the use of the term "about" in describing the embodiments of this application is intended to convey that the description is an approximation, and that the embodiments of this application are not limited to the precise values, ranges, or parameters described, unless otherwise specifically indicated.

[0071] The preferred embodiments of the application are described above in detail. The application is not limited to the embodiments described above, but can vary and be modified, as can occur to those skilled in the art. Any equivalent realizations, modifications, and improvements made without departing from the spirit and principles of the application shall fall within the scope of protection of the application.

Claims

1. An aperture driving device characterized by comprising: The application relates to a rotating body driving assembly, which comprises the following components: a base assembly (10) with a containing cavity; a rotating body (20) with at least one part of the rotating body (20) movably arranged in the containing cavity, a circumferential outer wall of the rotating body (20) having a driving groove (21) extending in the circumferential direction, the driving groove (21) having a height difference in the axial direction of the rotating body (20) at both ends in the length direction of the driving groove (21); a spring assembly (30) with at least one part of the spring assembly (30) arranged on the base assembly (10) and at least one part of the spring assembly (30) being compressible in the axial direction of the rotating body (20); an abutting assembly (40) drivenly connected with the spring assembly (30) and moved in the axial direction of the rotating body (20) by the spring assembly (30), the abutting assembly (40) having an abutting end (41) with at least one part of the abutting end (41) extending into the driving groove (21) and driving the rotating body (20) to rotate; a plurality of diaphragm blades (50) arranged in the circumferential direction of the rotating body (20), the diaphragm blades (50) being respectively connected with the base assembly (10) and the rotating body (20) and being rotatable with the rotating body (20) relative to the base assembly (10).

2. The aperture driving device according to claim 1, wherein The spring assembly (30) comprises: an SMA wire spring (31) being compressible in the axial direction of the rotating body (20) after being electrified; a transmission structure (32) electrically connected with the SMA wire spring (31), the abutting assembly (40) being connected with the transmission structure (32) and the part of the transmission structure (32) connected with the abutting assembly (40) being movable in the axial direction of the rotating body (20) along with the SMA wire spring (31).

3. The aperture driving device according to claim 2, wherein The transmission structure (32) comprises: an upper pressing sheet (321) connected with the abutting assembly (40); a lower pressing sheet (322) electrically connected with the upper pressing sheet (321) and the lower pressing sheet (322) respectively and being arranged in the axial direction of the rotating body (20) in a spaced manner.

4. The aperture driving device according to claim 3, wherein The transmission structure (32) further comprises a spring sheet (323) and a welding end foot (324), one end of the spring sheet (323) being connected with the end of the upper pressing sheet (321) away from the SMA wire spring (31) and the other end of the spring sheet (323) being connected with the welding end foot (324).

5. The aperture driving device according to claim 3, wherein The transmission structure (32) further comprises a positioning column (325) being closer to the rotating body (20) relative to the upper pressing sheet (321) and the lower pressing sheet (322) in the radial direction of the rotating body (20), the abutting assembly (40) being sleeved on the positioning column (325) and being slidable in the axial direction of the positioning column (325).

6. The aperture driving device according to claim 5, wherein The transmission structure (32) further comprises: a mounting block (326) arranged on the circumferential side wall of the base assembly (10), and two ends of the positioning column (325) are connected with the mounting block (326) respectively; a reset spring (327) sleeved on the positioning column (325), and one end of the reset spring (327) is connected with the abutting assembly (40), and the other end of the reset spring (327) abuts against the mounting block (326).

7. The aperture driving device according to claim 5, wherein The SMA wire spring (31) is electrically connected with one end of the upper pressing piece (321) and one end of the lower pressing piece (322) away from the positioning column (325) respectively, and the upper pressing piece (321) and the lower pressing piece (322) are correspondingly provided with bending structures (33) in the length direction, and one end of the upper pressing piece (321) connected with the SMA wire spring (31) is close to the rotating body (20) relative to one end of the upper pressing piece (321) connected with the positioning column (325), and one end of the lower pressing piece (322) connected with the SMA wire spring (31) is close to the rotating body (20) relative to one end of the lower pressing piece (322) connected with the positioning column (325).

8. The aperture driving device according to claim 2, wherein The abutting assembly (40) comprises: a mounting seat (42) having a mounting cavity, the mounting seat (42) is connected with the transmission structure (32), and one end of the mounting seat (42) away from the transmission structure (32) has a mounting hole in communication with the mounting cavity; a thimble (43), one end of the thimble (43) is located in the mounting cavity, and the other end of the thimble (43) is the abutting end (41) and extends out of the mounting cavity through the mounting hole.

9. The aperture driving device according to claim 8, wherein The abutting assembly (40) further comprises an abutting spring arranged in the mounting cavity, one end of the abutting spring abuts against the mounting seat (42), and the other end of the abutting spring abuts against the thimble (43).

10. The aperture driving device according to any one of claims 1 to 9, wherein The aperture driving device further comprises a gear assembly (60) arranged on the circumferential inner side wall of the base assembly (10) opposite to the spring assembly (30), and the circumferential outer side wall of the rotating body (20) has a rack (22) matched with the gear assembly (60).

11. The aperture driving device according to claim 10, wherein The axial direction of the gear assembly (60) is parallel to the axial direction of the rotating body (20).

12. The aperture driving device according to claim 10, wherein The aperture driving device further comprises at least two rollers (70), two rollers (70) are arranged on both sides of the gear assembly (60) around the circumferential inner side wall of the base assembly (10), and the axial inner side wall of the base assembly (10) is provided with different mounting grooves (11) corresponding to different rollers (70).

13. The aperture driving device according to claim 12, wherein, two rollers (70) are symmetrically arranged about the gear assembly (60); and / or The distance from the roller (70) to the gear assembly (60) is less than the distance from the roller (70) to the spring assembly (30). 14.The aperture driving device according to any one of claims 1 to 9, characterized in that, The aperture driving device further comprises a plurality of balls (80) arranged between the bottom surface of the rotating body (20) and the bottom surface of the base assembly (10), and the rotating body (20) and the base assembly (10) are respectively provided with ball grooves (81) corresponding to the balls (80); and / or The bottom surface of the base assembly (10) is provided with at least one limiting protrusion (12), and the bottom surface of the rotating body (20) is provided with a limiting groove (23) extending along the circumference of the rotating body (20) corresponding to the limiting protrusion (12).

15. The aperture driving device according to any one of claims 1 to 9, wherein The circumferential side wall of the base assembly (10) is provided with an avoiding opening (13) for accommodating the spring assembly (30), and the aperture driving device further comprises a protective cover plate (90) covering the avoiding opening (13).

16. An image pickup device, characterized by comprising: An imaging device comprising the aperture driving device according to any one of claims 1 to 15.

17. An electronic device, comprising: An imaging device comprising the aperture driving device according to claim 16.

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