Extension / contraction drive device, lens drive device, camera device, electronic device

Abstract

The application discloses a telescopic driving device, a lens driving device, a photographing device and an electronic device, and technical scheme points are as follows: a telescopic driving device comprises a base and a lens carrier, a telescopic mechanism for driving the lens carrier to telescopically extend and contract is arranged between the base and the lens carrier, the telescopic mechanism comprises a plurality of support bodies which are telescopically sleeved with each other, and a plurality of telescopic driving elements which are respectively connected with the corresponding support bodies and are used for driving the support bodies to telescopically extend and contract, the lens carrier is arranged on the innermost support body, and the support bodies slide perpendicularly to the direction of the base; each support body is provided with a guide assembly for guiding the support body. The telescopic driving device realizes telescopic extension and contraction in sections through the three support body structures, the telescopic length of the lens carrier is increased, and the telescopic driving device has the advantages of large stroke, high photographing precision and small size.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photographic equipment, in particular to telescopic drive device, lens drive device, photographic device and electronic equipment. BACKGROUND

[0002] Camera modules with auto focusing (AF) function are widely used in mobile electronic products such as digital cameras, mobile phones or tablets.

[0003] With the development of high precision and high magnification of cameras, optical image stabilization functions that correct hand jitter, vibration, etc. when taking pictures or videos using smart phones, for example, are using more complex correction methods for hand jitter, vibration, etc. The existing lens drive device is limited in size and it is difficult to achieve large stroke movement of the lens. The existing segmented lens drive device has a complex structure and a large size, which is not conducive to the development trend of thin and small lens drive devices.

[0004] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. SUMMARY

[0005] The purpose of the present application is to provide telescopic drive device, lens drive device, photographic device and electronic equipment, which realizes segmented telescopic movement through three support body structures, increases the telescopic length of the lens carrier, and has the advantages of large stroke, high image accuracy and small size.

[0006] The above technical purpose of the present application is achieved by the following technical scheme: a telescopic drive device comprising a base, a lens carrier,

[0007] A telescopic mechanism for driving the lens carrier to move in segments is arranged between the base and the lens carrier,

[0008] The telescopic mechanism comprises a plurality of support bodies that are mutually sleeved and telescopic, and a plurality of telescopic drive elements that are respectively connected to the corresponding support bodies and used to drive the support bodies to move in segments, the lens carrier is arranged in the innermost support body, and the support bodies slide perpendicularly to the direction of the base.

[0009] Each of the support bodies is provided with a guide assembly for guiding the support body.

[0010] The present application further provides that the lower end of the support body is integrally formed with an outer protruding portion protruding from the outer side wall of the support body, and the upper end of the support body is integrally formed with an inner protruding portion protruding from the inner side wall of the support body, and the outer protruding portion and the inner protruding portion of the adjacent two support bodies can abut and limit each other.

[0011] The further arrangement of the present application is that when the support bodies are arranged as at least three, the telescopic driving elements are located between the innermost support body and the adjacent support body, the output end of the telescopic driving element is connected to the corresponding support body, the main body part of the telescopic driving element is connected to the lower end face of the adjacent support body outside the corresponding support body, and the main body part of the telescopic driving element connected to the outermost support body is fixed to the base.

[0012] The further arrangement of the present application is that the guide assembly comprises a guide rod and a sliding sleeve, the sliding sleeve is fixed to the side wall of the corresponding support body, the guide rod is arranged vertically and connected to the adjacent support body outside the corresponding support body, and the corresponding guide rod of the outermost support body is fixedly connected to the base.

[0013] The further arrangement of the present application is that the output end of the telescopic driving element is provided with a bottom support connected to the lower end face of the corresponding support body, when the telescopic driving element is spaced apart from the corresponding support body, the bottom support bypasses the spaced-apart support body and is fixed to the lower end face of the corresponding support body.

[0014] The further arrangement of the present application is that when the support bodies are arranged as at least two, the telescopic driving elements are located between the inner support body and the outer support body, the output end of the telescopic driving element is connected to the corresponding support body, the main body part of the telescopic driving element is connected to the outer support body, and the main body part of the telescopic driving element connected to the outer support body is fixed to the base.

[0015] The further arrangement of the present application is that the guide assembly is arranged as two groups, each group comprising a guide rod and a sliding sleeve, the sliding sleeve is fixed to the side wall of the corresponding support body, the guide rod corresponding to the inner support body is fixedly connected to the outer support body, and the guide rod corresponding to the outer support body is fixed to the base.

[0016] The further arrangement of the present application is that a lens driving device has the telescopic driving device described above.

[0017] The further arrangement of the present application is that a photographing device has the lens driving device described above.

[0018] The further arrangement of the present application is that an electronic device has the photographing device described above.

[0019] In summary, the present application has the following beneficial effects:

[0020] When driving the lens carrier to stretch out or retract, the outer support body is driven to move away from the base by the outer driving element, the middle driving element is fixed to the outer support body, the inner driving element is fixed to the middle support body, and the corresponding middle support body and inner support body are respectively driven to stretch out or retract by the middle driving element and the inner driving element; the three support body structures are used to realize segmented stretching out or retraction, and the stretching out or retraction length of the lens carrier is increased; in addition, the outer driving element, the middle driving element and the inner driving element are located between the inner support body and the middle support body through the bottom support structure, the space occupied by the outer driving element, the middle driving element and the inner driving element is effectively saved, and the above structure has the advantages of large stroke, high imaging accuracy and small size.

[0021] The outer convex part between the two adjacent support bodies can abut against the inner convex part, so as to realize the buckle function and limit the mutual separation of the two adjacent support bodies, and the connection strength between the support bodies is improved.

[0022] The inner guiding assembly, the middle guiding assembly and the outer guiding assembly are used to realize the guiding effect of the inner support body, the middle support body and the outer support body, and ensure that the inner support body, the middle support body and the outer support body move perpendicularly to the base.

[0023] When the lens carrier stretches out or retracts, the sleeve is synchronously driven to stretch out or retract, so that dust is prevented from entering between the lens carrier and the image sensor, and the dustproof performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is an explosion schematic diagram of example 1;

[0025] Figure 2 is a cross-sectional view of example 1 Figure One ;

[0026] Figure 3 is a schematic diagram of example 1 in which the middle support body is hidden;

[0027] Figure 4 is a schematic diagram of example 1 in which the outer support body and the middle support body are hidden;

[0028] Figure 5 is a top view of example 1 in which the outer support body and the middle support body are hidden;

[0029] Figure 6 is a cross-sectional view of example 1 Figure Two ;

[0030] Figure 7 is a schematic diagram of the lens in the stretched state of example 2;

[0031] Figure 8 is a schematic diagram of the lens in the retracted state of example 2.

[0032] The corresponding component names represented by the numbers in the figure: 1, base; 12, inner support body; 13, middle support body; 14, outer support body; 15, inner convex part; 16, outer convex part; 17, inner driving element; 18, middle driving element; 19, outer driving element; 20, bottom support; 21, inner guide assembly; 22, inner guide rod; 23, inner sliding sleeve; 24, middle guide assembly; 25, middle guide rod; 26, middle sliding sleeve; 27, outer guide assembly; 28, outer guide rod; 29, outer sliding sleeve; 30, outer fixed frame; 31, middle fixed frame; 32, sleeve; 33, lens carrier. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with the drawings and specific embodiments.

[0034] Embodiment 1: A telescopic driving device, comprising a base 1 and a lens carrier 33, a telescopic mechanism for driving the lens carrier 33 to segmentally telescope is arranged between the base 1 and the lens carrier 33.

[0035] The telescopic mechanism comprises at least three mutually sleeved and telescopic support bodies, at least three telescopic driving elements respectively connected with the corresponding support bodies and used for driving the support bodies to telescope, the lens carrier 33 is arranged in the innermost support body, the support bodies slide vertically to the direction of the base 1, the telescopic driving elements can be piezoelectric driving elements, electromagnetic driving elements, etc., piezoelectric driving elements are selected in the present embodiment, and the support bodies and the telescopic driving elements are all three in the present embodiment. The lower end position of each support body is integrally formed with an outer convex part 16 protruding from the outer side wall of the support body, the upper end position of the support body is integrally formed with an inner convex part 15 protruding from the inner side wall of the support body, the outer convex part 16 can be attached to the inner side wall of the adjacent support body, and the inner convex part 15 can be attached to the inner side wall of the adjacent support body. And the outer convex part 16 between the two adjacent support bodies can abut against the inner convex part 15, so as to realize the buckle function. And the two adjacent support bodies are limited to be separated from each other, so as to improve the connection strength between the support bodies.

[0036] In this embodiment, the three support bodies are respectively: inner support body 12, middle support body 13, outer support body 14 from inside to outside, and the lens carrier 33 is fixed to the inner convex part 15 position of the inner support body 12. The telescopic driving elements are also arranged as three and correspond to the inner support body 12, the middle support body 13, and the outer support body 14. The three telescopic driving elements are respectively the inner driving element 17, the middle driving element 18, and the outer driving element 19. The inner driving element 17, the middle driving element 18, and the outer driving element 19 are all located between the inner support body 12 and the middle support body 13. The inner driving element 17 is fixed to the middle support body 13 and the output end is connected to the inner support body 12. The middle driving element 18 is fixed to the outer support body 14 and the output end is connected to the inner support body 12. The outer driving element 19 is fixed to the base 1 and the output end is connected to the outer driving element 19.

[0037] The output ends of the outer driving element 19, the middle driving element 18, and the inner driving element 17 are all provided with a bottom support 20 fixed to the lower end of the corresponding outer support body 14, middle support body 13, and inner support body 12, respectively. The bottom support 20 is arranged in a V shape, and the lower end surface of the middle support body 13 can abut or adhere to the bottom support 20 connected to the outer support body 14.

[0038] When driving the telescopic movement of the lens carrier 33, the outer driving element 19 drives the outer support body 14 to move away from the base 1, the middle driving element 18 is fixed to the outer support body 14, the inner driving element 17 is fixed to the middle support body 13, and the corresponding middle support body 13 and inner support body 12 are driven to telescope by the middle driving element 18 and the inner driving element 17, respectively. The three support body structures realize segmented telescopic movement, increase the telescopic length of the lens carrier 33, and through the bottom support 20 structure, the outer driving element 19, the middle driving element 18, and the inner driving element 17 are located between the inner support body 12 and the middle support body 13, effectively saving the space occupied by the outer driving element 19, the middle driving element 18, and the inner driving element 17. The above structure realizes the advantages of large stroke, high camera precision, and small volume.

[0039] In order to further improve the telescopic accuracy of the inner support body 12, the middle support body 13 and the outer support body 14, the inner support body 12, the middle support body 13 and the outer support body 14 are respectively connected with an inner guide assembly 21, a middle guide assembly 24 and an outer guide assembly 27. The inner guide assembly 21, the middle guide assembly 24 and the outer guide assembly 27 are consistent in structure. In the embodiment, the inner guide assembly 21, the middle guide assembly 24 and the outer guide assembly 27 are both provided as two groups and symmetrically arranged. The outer guide assembly 27 comprises an outer guide rod 28 fixed to the base 1 and an outer sliding sleeve 29 fixed to the outer support body 14. The middle guide assembly 24 comprises a middle guide rod 25 fixed to the outer support body 14 and a middle sliding sleeve 26 fixed to the middle support body 13. The inner guide assembly 21 comprises an inner guide rod 22 fixed to the middle support body 13 and an inner sliding sleeve 23 fixed to the inner support body 12. The outer sliding sleeve 29, the middle sliding sleeve 26 and the inner sliding sleeve 23 are respectively connected to the outer protruding part 16 of the corresponding outer support body 14, middle support body 13 and inner support body 12.

[0040] The outer support body 14 is fixed with an outer fixed frame 30 at the lower end surface. The outer fixed frame 30 extends from the position right below the middle support body 13 to the space between the inner support body 12 and the middle support body 13 and is fixedly connected with the middle guide rod 25. The middle support body 13 is fixed with a middle fixed frame 31 which is fixedly connected with the middle guide rod 25. The outer guide rod 28 is located outside the outer support body 14, and the middle guide rod 25 and the inner guide rod 22 are arranged between the inner support body 12 and the middle support body 13.

[0041] The inner guide assembly 21, the middle guide assembly 24 and the outer guide assembly 27 realize the guiding effect on the inner support body 12, the middle support body 13 and the outer support body 14, so as to ensure that the inner support body 12, the middle support body 13 and the outer support body 14 move vertically to the base 1.

[0042] In order to realize the dustproof effect, a plurality of sleeve pipes 32 which are mutually sleeved are arranged between the base 1 and the lens carrier 33. The side wall of the sleeve pipe 32 can be inclined, that is, the end part of one end of the sleeve pipe 32 is larger than that of the other end. The sleeve pipe 32 is provided as at least three. The two ends of the sleeve pipe 32 are respectively fixed with the lens carrier 33 and the base 1. When the lens carrier 33 moves telescopically, the sleeve pipe 32 is driven to move telescopically, so as to avoid dust from entering between the lens carrier 33 and the image sensor 2 and improve the dustproof performance.

[0043] Embodiment 2, different from embodiment 1, is that two support bodies are arranged and sleeved with each other, the corresponding telescopic driving elements are located between the inner support body and the outer support body, the output ends of the telescopic driving elements are connected to the corresponding support bodies, the main parts of the telescopic driving elements are connected to the outer support body, and the main parts of the telescopic driving elements connected to the outer support body are fixed to the base 1. The guide assemblies are arranged in two groups, each of which includes a guide rod and a sliding sleeve, the sliding sleeves of the two groups of guide assemblies are fixed to the side walls of the corresponding support bodies, the guide rod corresponding to the inner support body is fixedly connected to the outer support body, and the guide rod corresponding to the outer support body is fixed to the base 1.

[0044] Embodiment 3: A lens driving device has the telescopic driving device of embodiment 1.

[0045] Embodiment 4: A camera device has the lens driving device of embodiment 3.

[0046] Embodiment 5: An electronic device has the camera device of embodiment 4.

[0047] In this document, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the purpose of expressing the clarity and convenience of the description of the technical scheme, and therefore cannot be understood as a limitation on the present application.

[0048] In this document, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to including the listed elements, other elements not explicitly listed can also be included.

[0049] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A telescopic drive device, comprising a base (1) and a lens carrier (33), Its features are: A telescopic mechanism for driving the lens carrier (33) to extend and retract in segments is provided between the base (1) and the lens carrier (33). The telescopic mechanism includes several interlocking and telescopic support bodies and several telescopic drive elements that are respectively connected to the corresponding support bodies and used to drive the support bodies to extend and retract. The support body slides perpendicular to the base (1), and the lens carrier (33) is located on the innermost support body; Each of the supports is provided with a guide component for guiding the support; The lower end of the support body is provided with an outward protrusion (16), and the upper end of the support body is provided with an inward protrusion (15). The outward protrusion (16) and the inward protrusion (15) between two adjacent supports bodies can abut against each other and limit each other. Several sleeves (32) are provided between the base (1) and the lens carrier (33). The first and last ends of the sleeves (32) are fixed to the lens carrier (33) and the base (1) respectively. When the lens carrier (33) moves in extension and retraction, the sleeves (32) move in extension and retraction simultaneously.

2. The telescopic drive device according to claim 1, characterized in that: The lower end of the support body is integrally formed with an outward protrusion (16) protruding from the outer side wall of the support body, and the upper end of the support body is integrally formed with an inward protrusion (15) protruding from the inner side wall of the support body. The outward protrusion (16) and the inward protrusion (15) between two adjacent supports bodies can abut against each other and limit each other.

3. A telescopic drive device according to claim 1 or 2, characterized in that: When the support body is set to at least three, several of the telescopic drive elements are located between the innermost support body and the adjacent support body. The output end of the telescopic drive element is connected to the corresponding support body, and the main body of the telescopic drive element is connected to the lower end face of the adjacent support body outside the corresponding support body. The main body of the telescopic drive element connected to the outermost support body is fixed to the base (1).

4. A telescopic drive device according to claim 3, characterized in that: The guide assembly includes a guide rod and a sliding sleeve; the sliding sleeve is fixed to the side wall of the corresponding support body, the guide rod is vertically arranged and connected to the adjacent support body on the outside of the corresponding support body, and the guide rod corresponding to the outermost support body is fixedly connected to the base (1).

5. A telescopic drive device according to claim 3, characterized in that: The output end of the telescopic drive element is provided with a base (20) that connects to the lower end face of the corresponding support. When there is a support between the telescopic drive element and the corresponding support, the base (20) bypasses the support and is fixed to the lower end face of the corresponding support.

6. A telescopic drive device according to claim 1 or 2, characterized in that: When the support body is set to two, the corresponding telescopic drive element is located between the inner support body and the outer support body. The output end of the telescopic drive element is connected to the corresponding support body, the main body of the telescopic drive element is connected to the outer support body, and the main body of the telescopic drive element connected to the outer support body is fixed to the base (1).

7. A telescopic drive device according to claim 6, characterized in that: The guide assembly is configured in two sets, each including a guide rod and a sliding sleeve. The sliding sleeve is fixed to the side wall of the corresponding support body, and the guide rod corresponding to the inner support body is fixedly connected to the outer support body; the guide rod corresponding to the outer support body is fixed to the base (1).

8. A lens driving device, characterized in that: The device comprises the telescopic drive device as described in any one of claims 1 to 7.

9. A photographic apparatus, characterized in that: It has the lens driving device as described in claim 8.

10. An electronic device, characterized in that: It has the photographic apparatus as described in claim 9.

Images