Lens driving device, photographic device, and electronic device

Abstract

The present invention provides a lens driving device, which includes a housing, a gasket, a lens carrier, a coil, a magnet and a base. The lens carrier is disposed on the base, the gasket is disposed within the housing, the housing encloses the gasket, the lens carrier, the coil and the magnet and is connected to the base. The lens driving device further includes at least three elastic pieces, and the at least three elastic pieces are respectively disposed between the base and the gasket and connect the base and the carrier. In the lens driving device, camera device and electronic device of the present invention, by arranging a plurality of elastic pieces to position the carrier, the positioning degree of the carrier structure is stronger, the thrust of the lens driving device can drive an overweight lens, achieving dozens of times the thrust of the current similar lens driving devices, and having particularly important leapfrog progress.

Description

Technical Field

[0001] The present invention relates to a lens driving device, a photographic device, and an electronic device. Background Art

[0002] With the popularization of electronic products, cameras are equipped in a large number of electronic devices. For example, micro cameras are configured in electronic devices such as mobile phones and tablet computers. Some of such micro cameras can perform autofocus. A lens driving device for driving a lens is provided in an autofocus type micro camera.

[0003] A patent application with Chinese Publication No. "CN105759391A" discloses a lens driving device, which includes a bobbin, two magnets, a holder, a first elastic member, and a second elastic member.

[0004] It can be seen that in the prior art, a traditional lens driving device usually has two elastic members, which are respectively arranged on the upper and lower sides of the holder to support the upper and lower sides of the bobbin. However, the driving force of the lens driving device with such a structure is not strong enough. The heaviest it can push in the prior art is 0.9 grams, usually 0.1 gram.

[0005] Therefore, in the case of large driving force, if the number of shrapnel is too small, it needs to be thickened to ensure the linear movement of the lens. Thickening will affect the elastic coefficient of the spring. To ensure a certain range of elastic coefficient K value, the length of the spring wire will be designed to increase, occupying a large amount of space.

[0006] In view of this, those skilled in the art are committed to researching and developing an improved structure of the lens driving device in order to solve the above technical problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defect that the lens driving device in the prior art is not applicable to the case of large driving force, and to provide a lens driving device, a photographic device, and an electronic device.

[0008] The present invention solves the above technical problems by the following technical solutions:

[0009] A lens driving device includes a housing, a gasket, a lens carrier, a coil, a magnet, and a base. The lens carrier is arranged on the base. The gasket is arranged in the housing. The housing covers the gasket, the lens carrier, the coil, and the magnet and is connected to the base. The lens driving device further includes at least three shrapnel, and the at least three shrapnel are respectively arranged on the base and the gasket and connect the base and the carrier.

[0010] According to an embodiment of the present invention, at least one of the shrapnel is arranged on the base, and correspondingly, at least two of the shrapnel are arranged on the gasket.

[0011] According to an embodiment of the present invention, at least one of the elastic pieces is disposed on the gasket, and correspondingly, at least two elastic pieces are disposed on the base.

[0012] According to an embodiment of the present invention, the lens driving device includes a first elastic piece, a second elastic piece, and a third elastic piece. The first elastic piece and the second elastic piece are mounted on the base, and the third elastic piece is mounted on the gasket.

[0013] According to an embodiment of the present invention, a first step is provided on the base, and the first elastic piece is placed on the first step;

[0014] The bottom end of the lens carrier is provided with a second step and a third step protruding outwards in sequence. The second elastic piece is mounted on the second step, and the first elastic piece is mounted on the third step;

[0015] The second elastic piece is connected to the coil on the lens carrier, and the second elastic piece is connected to the terminal.

[0016] According to an embodiment of the present invention, the first elastic piece and the base are connected by hot riveting and / or gluing, and the second elastic piece and the lens carrier are connected by hot riveting and / or gluing.

[0017] According to an embodiment of the present invention, a magnet is provided on the inner surface of the housing, and the bottom of the magnet abuts against the elastic piece.

[0018] The present invention also provides a photographic device, characterized in that the photographic device is configured with the lens driving device as described above.

[0019] The present invention also provides an electronic device, characterized in that the electronic device is configured with the photographic device as described above.

[0020] The positive and progressive effects of the present invention are as follows:

[0021] The lens driving device, the photographic device, and the electronic device of the present invention position the carrier by providing multiple elastic pieces, making the positioning of the carrier structure stronger. The thrust of the lens driving device can push an overweight lens, achieving dozens of times the current thrust of the lens driving device, which has particularly important leapfrog progress. Description of the Drawings

[0022] The above-mentioned and other features, properties, and advantages of the present invention will become more obvious through the following description in conjunction with the drawings and embodiments. The same reference numerals in the drawings always represent the same features, wherein:

[0023] Figure 1 is an exploded view of the lens driving device of the present invention.

[0024] Figure 2 This is a perspective view of the base in the lens driving device of the present invention.

[0025] Figure 3 This is a perspective view of the lens carrier in the lens driving device of the present invention.

[0026] Figure 4 This is a side view of the lens carrier in the lens driving device of the present invention.

[0027] Figure 5 This is a perspective view of the gasket in the lens driving device of the present invention.

[0028] Figure 6 This is a perspective view of the housing in the lens driving device of the present invention.

[0029] Figure 7 This is a perspective view of the first elastic piece in the lens driving device of the present invention.

[0030] Figure 8 This is a perspective view of the second elastic piece in the lens driving device of the present invention.

[0031] Figure 9 This is a perspective view of the third elastic piece in the lens driving device of the present invention.

[0032] Figure 10 This is a perspective view of the fourth elastic piece in the lens driving device of the present invention.

[0033]

Reference Signs

[0034] Housing 10

[0035] Gasket 20

[0036] Lens carrier 30

[0037] Base 40

[0038] First elastic piece 50

[0039] Second elastic piece 60

[0040] Third elastic piece 70

[0041] First step 41

[0042] Second step 31

[0043] Third step 32

[0044] Coil 35

[0045] Fourth elastic piece 80

[0046] Fourth step 33

[0047] Fifth step 34

[0048] Magnet 11 Detailed implementation manners

[0049] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the accompanying drawings.

[0050] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the present invention will now be described in detail, which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0051] In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein.

[0052] In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0053] Figure 1 Is an exploded view of the lens driving device of the present invention. Figure 2 Is a perspective view of the base in the lens driving device of the present invention. Figure 3 Is a perspective view of the lens carrier in the lens driving device of the present invention. Figure 4 Is a side view of the lens carrier in the lens driving device of the present invention. Figure 5 Is a perspective view of the gasket in the lens driving device of the present invention. Figure 6 Is a perspective view of the housing in the lens driving device of the present invention. Figure 7 Is a perspective view of the first elastic piece in the lens driving device of the present invention. Figure 8 Is a perspective view of the second elastic piece in the lens driving device of the present invention. Figure 9 Is a perspective view of the third elastic piece in the lens driving device of the present invention. Figure 10 Is a perspective view of the fourth elastic piece in the lens driving device of the present invention.

[0054] As Figures 1 to 10 shown, the present invention discloses a lens driving device, including a housing 10, a gasket 20, a lens carrier 30 and a base 40. The lens carrier 30 is arranged on the base 40, the gasket 20 is arranged in the housing 10, and the housing 10 covers the lens carrier 30, the gasket, the elastic pieces and the magnet and is connected to the base 40. At the same time, the lens driving device further includes at least three elastic pieces.

[0055] Preferably, at least one of the elastic pieces is disposed on the base 40, and correspondingly, at least two elastic pieces are disposed on the gasket 20. Or at least one of the elastic pieces is disposed on the gasket 20, and correspondingly, at least two elastic pieces are disposed on the base 40.

[0056] Preferably, the lens driving device includes a first elastic piece 50, a second elastic piece 60, and a third elastic piece 70. The first elastic piece 50 and the second elastic piece 60 are mounted on the base 40, and the third elastic piece 70 is mounted on the gasket 20. Meanwhile, a first step 41 is provided on the base 40, and the first elastic piece 50 is placed on the first step 41. The bottom end of the lens carrier 30 is provided with a second step 31 and a third step 32 that protrude outward in sequence. The second elastic piece 60 is mounted on the second step 31, and the first elastic piece 50 is mounted on the third step 32. The second elastic piece 60 is connected to the coil 35 on the lens carrier 30, and the second elastic piece 60 is connected to the terminal.

[0057] Particularly, here, the first elastic piece 50 and the base 40 are connected by thermal riveting and / or gluing, and the second elastic piece 60 and the lens carrier 30 are connected by thermal riveting and / or gluing.

[0058] Further, a groove (not shown in the figure) is provided on the bottom end surface of the gasket 20, and the third elastic piece 70 is mounted in the groove.

[0059] In addition, furthermore, a fourth elastic piece 80 is also mounted on the bottom end surface of the gasket 20. The third elastic piece 70 and the fourth elastic piece 80 are both connected to the gasket 20 by thermal riveting and / or gluing.

[0060] Similarly, on the upper end of the lens carrier 30, a fourth step 33 and a fifth step 34 that protrude outward in sequence are provided. The fourth elastic piece 80 is mounted on the fourth step 33, and the third elastic piece 70 is mounted on the fifth step 34.

[0061] In addition, magnets 11 are provided around the inner surface of the housing 10, so that the bottom of the magnets 11 abuts against the fourth elastic piece 80.

[0062] According to the above structure, the following steps can be adopted to assemble the lens driving device:

[0063] First: Dispose the third elastic piece 70 in the corresponding groove of the gasket 20, and the preferred method is thermal riveting or gluing; dispose the fourth elastic piece 80 on the gasket 20, and the preferred method is thermal riveting or gluing.

[0064] Second, dispose the gasket 20 in the housing 10, and the preferred method is gluing. Magnets 11 are provided along the four sides of the housing 10, so that the magnets 11 abut against the above-mentioned fourth elastic piece 80, thereby enhancing the pressing effect on the fourth elastic piece 80 and making the fourth elastic piece 80 not easy to fall off.

[0065] Next, the first elastic piece 50 is disposed at the corresponding position on the base 40, and the preferred method is hot riveting and / or gluing; the second elastic piece 60 is disposed on the lens carrier 30, and the preferred method is hot riveting and / or gluing; the lens carrier 30 and the second elastic piece 60 are disposed on the base 40, and the preferred method is hot riveting and / or gluing.

[0066] In this way, a stepped placement structure corresponding to the first elastic piece 50, the second elastic piece 60, the third elastic piece 70, and the fourth elastic piece 80 is provided on the lens carrier 30. Among them, the inner diameter of the third elastic piece 70 is preferably smaller than the inner diameter of the fourth elastic piece 80, and the inner diameter of the first elastic piece 50 is preferably smaller than the inner diameter of the second elastic piece 60.

[0067] Finally, glue is applied to the stepped structure (i.e., the second step 31, the third step 32, the fourth step 33, and the fifth step 34) or on the elastic pieces, and the assembled first elastic piece 50, second elastic piece 60, outer shell 10, gasket 20, and magnet 11 are fixed after being assembled with the assembled base 40, third elastic piece 70, fourth elastic piece 80, and coil 35 carrier.

[0068] As described in the above structure, the lens driving device of the present invention adopts a multi-elastic-piece motor. For example, at least three elastic pieces are adopted. In this embodiment, the cases of adopting three elastic pieces and four elastic pieces are exemplified. Of course, it is not limited by the embodiments here, and a structure with more elastic pieces can also be adopted.

[0069] In the case of large thrust, if the number of elastic pieces is too small, it is necessary to increase their thickness. In order to ensure the elastic coefficient K value, it is necessary to design and increase the length of the spring wire, occupying space. Therefore, the present invention positions the carrier through multiple springs, so that the positioning degree of the carrier structure (i.e., the mover structure) is relatively strong.

[0070] Among them, as Figure 1 shown, the outer shell, gasket, third elastic piece, fourth elastic piece, and magnet form the stator part structure; the coil, lens carrier, first elastic piece, second elastic piece, and base form the mover part structure. The structure of the lens driving device can enable the motor to push an overweight lens, having prominent and remarkable technical effects.

[0071] Based on the above structure, the present invention also provides a photographic device configured with the lens driving device as described above.

[0072] Based on the above structure, the present invention also provides an electronic device configured with the photographic device as described above.

[0073] Therefore, in the present embodiment, the lens driving device, the photographic device, and the electronic device of the present invention position the carrier by providing a plurality of elastic pieces, so that the positioning degree of the carrier structure is stronger, and the thrust of the lens driving device can reach an overweight lens, achieving dozens of times the current thrust of the lens driving device, which has a particularly important leap-forward progress.

[0074] Although the above content has described the preferred embodiment of the present invention with reference to the accompanying drawings, the present invention is not limited to these embodiments. According to the content recorded in the scope of the patent application, various adjustments can be made when the technology is mastered.

[0075] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A lens driving device, comprising a housing, a gasket, a lens carrier, a coil, a magnet and a base. The lens carrier is disposed on the base. The gasket is disposed within the housing. The housing encloses the gasket, the lens carrier, the coil, the magnet and is connected to the base. Characterized in that, the lens driving device further includes at least three elastic pieces, and the at least three elastic pieces are respectively disposed on the base and the gasket and connect the base and the carrier; the inner surface of the housing is provided with a magnet. The lens driving device includes a first elastic piece and a second elastic piece, and the first elastic piece and the second elastic piece are mounted on the base. A first step is provided on the base, and the first elastic piece is placed on the first step. The bottom end of the lens carrier is provided with a second step and a third step protruding outward in sequence. The second elastic piece is mounted on the second step, and the first elastic piece is mounted on the third step. The second elastic piece is connected to the coil on the lens carrier, and the second elastic piece is connected to a terminal.

2. The lens driving device as claimed in claim 1, Characterized in that, at least one of the elastic pieces is disposed on the base, and correspondingly at least two of the elastic pieces are disposed on the gasket.

3. The lens driving device as claimed in claim 1, Characterized in that, at least one of the elastic pieces is disposed on the gasket, and correspondingly at least two of the elastic pieces are disposed on the base.

4. The lens driving device as claimed in claim 3, Characterized in that, the lens driving device includes a third elastic piece, and the third elastic piece is mounted on the gasket.

5. The lens driving device as claimed in claim 4, Characterized in that, the first elastic piece and the base are connected by hot riveting and / or gluing, and the second elastic piece and the lens carrier are connected by hot riveting and / or gluing.

6. The lens driving device as claimed in claim 1, Characterized in that, the bottom of the magnet abuts against the elastic piece.

7. A photographic device, Characterized in that, the photographic device is configured with the lens driving device as claimed in any one of claims 1-6.

8. An electronic device, Characterized in that, the electronic device is configured with the photographic device as claimed in claim 7.

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