Lens driving mechanism

Abstract

The present invention discloses a lens driving mechanism, which includes a housing, a carrier, a base, an upper spring piece, a lower spring piece and a magnet group. The magnet group is fixedly installed on the base or the housing. The carrier is provided with a coil corresponding to the magnet group. The upper spring piece movably connects the carrier to the housing, and the lower spring piece movably connects the carrier to the base. Wherein, a plurality of first elastic bodies are provided on the inner surface of the housing to prevent the carrier from directly contacting the inner surface of the housing during operation. The lens driving mechanism of the present invention can effectively prevent the carrier from colliding with the housing and / or the base, thereby achieving a better imaging effect.

Description

Technical Field

[0001] The present invention relates to the field of optics, and particularly to a lens driving mechanism. Background Art

[0002] With the development of technology, many current electronic devices (such as smart phones or digital cameras) have functions of taking pictures or videos. The use of these electronic devices is becoming more and more common, and they are developing towards a convenient, thin and light design direction to provide users with more choices.

[0003] Some electronic devices with functions of taking pictures or videos are provided with a lens driving module to drive an optical component such as a lens to move, so as to achieve functions of autofocus and optical image stabilization (OIS). Light can pass through the aforementioned optical component and form an image on a photosensitive component.

[0004] However, the carrier of the current lens driving module is prone to collide with the housing and the base, causing varying degrees of damage to the carrier, the housing and the base, and the particles generated by the collision will also affect the imaging effect. Summary of the Invention

[0005] The object of the present invention is to provide a lens driving mechanism to solve the problems existing in the above-mentioned prior art.

[0006] To solve the above problems, according to one aspect of the present invention, there is provided a lens driving mechanism, which includes a housing, a carrier, a base, an upper spring piece, a lower spring piece and a magnet group. The magnet group is fixedly installed on the base or the housing. The carrier is provided with a coil corresponding to the magnet group. The upper spring piece movably connects the carrier with the housing, and the lower spring piece movably connects the carrier with the base. Wherein, a plurality of first elastic bodies are provided on the inner surface of the housing to prevent the carrier from directly contacting the inner surface of the housing during operation.

[0007] In one embodiment, the first elastic bodies are arranged on the inner surface of the top wall of the housing.

[0008] In one embodiment, the top wall of the housing is provided with a plurality of injection holes, and the plurality of injection holes penetrate from the upper surface of the top wall to the lower surface of the top wall. The first elastic bodies are formed by injecting from the upper surface of the top wall to the lower surface of the top wall.

[0009] In one embodiment, the housing is provided with a central opening, and the central opening is matched with a lens. Four side portions and four corner portions are formed around the central opening. The first elastic bodies are arranged on the inner surfaces of the four side portions, and the four corner portions are sunken to form a sunken portion.

[0010] In one embodiment, each of the four side portions is provided with two of the injection holes, and the elastomer is formed by injection through the two injection holes.

[0011] In one embodiment, one of the first elastomers is provided on each of the side portions, and the first elastomers form an integral structure.

[0012] In one embodiment, the injection hole has an inclined inner wall such that the opening of the injection hole near the upper surface of the top wall is larger and the opening near the lower surface of the top wall is smaller.

[0013] In one embodiment, the base is provided with a base-embedded metal sheet, and the base-embedded metal sheet is provided with a second elastomer.

[0014] In one embodiment, the base-embedded metal sheet has a metal sheet upper surface facing the lower surface of the carrier and a metal sheet lower surface opposite to the metal sheet upper surface, and the second elastomer is disposed on the metal sheet upper surface and is used to prevent the carrier from directly contacting the base-embedded metal sheet.

[0015] In one embodiment, the base-embedded metal sheet is disposed in the base, and an opening is provided at a position corresponding to the second elastomer of the base, such that the second elastomer protrudes from the upper surface of the base.

[0016] In one embodiment, the base-embedded metal sheet is provided with a plurality of second elastomer mounting holes, and the second elastomer is provided with connecting columns, and the connecting columns are engaged with the second elastomer mounting holes to mount the second elastomer on the base-embedded metal sheet.

[0017] In one embodiment, the elastomer mounting hole has an inclined inner surface such that a portion of the elastomer mounting hole near the metal sheet upper surface has a larger radius and a portion near the metal sheet lower surface has a smaller radius.

[0018] In one embodiment, the carrier has a carrier upper surface facing the housing and a carrier lower surface facing the base, the carrier upper surface is provided with a plurality of upper spring sheet connection portions, the carrier lower surface is provided with a plurality of lower spring sheet connection portions, and a third elastomer is further provided on the carrier upper surface and the carrier lower surface to prevent the carrier upper surface from directly contacting the inner surface of the housing and prevent the carrier lower surface from directly contacting the upper surface of the base.

[0019] In one embodiment, the carrier is provided with a third elastomer mounting hole that extends from the upper surface of the carrier to the lower surface of the carrier, forming an upper opening on the upper surface of the carrier and a lower opening on the lower surface of the carrier. The third elastomer is disposed within the third elastomer mounting hole and protrudes upward from the upper surface of the carrier and downward from the lower surface of the carrier.

[0020] In one embodiment, the upper spring piece mounting portion protrudes a certain distance from the upper surface of the carrier, a sunken portion is formed between two adjacent upper spring piece mounting portions, and each upper spring piece mounting portion is provided with one of the third elastomer mounting holes.

[0021] In one embodiment, the carrier is formed by injection molding, and the third elastomer is formed and disposed within the injection molding die of the carrier before the carrier is injection molded, and is fixed within the third elastomer mounting hole after the carrier is formed.

[0022] The lens driving mechanism of the present invention can effectively prevent the carrier from colliding with the housing and / or the base, thereby achieving a more excellent imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded perspective view of a lens driving mechanism according to an embodiment of the present invention.

[0024] Figure 2 is a perspective view of a housing according to an embodiment of the present invention.

[0025] Figure 3 is a bottom view of a housing according to an embodiment of the present invention.

[0026] Figure 4 is a top view of a housing according to an embodiment of the present invention.

[0027] Figure 5 is a bottom view of a housing according to an embodiment of the present invention, without the first elastomer installed.

[0028] Figure 6 is a top view of a housing according to an embodiment of the present invention, without the first elastomer installed.

[0029] Figure 7 is a top view of a base with an embedded metal sheet according to an embodiment of the present invention.

[0030] Figure 8 is a bottom view of a base with an embedded metal sheet according to an embodiment of the present invention.

[0031] Figure 9 is a top view of a base according to an embodiment of the present invention.

[0032] Figure 10 It is a top view of a carrier according to an embodiment of the present invention.

[0033] Figure 11 It is a bottom view of a carrier according to an embodiment of the present invention.

[0034] Figure 12 It is a top view of a third elastomer assembly according to an embodiment of the present invention.

[0035] Figure 13 It is a top view of a carrier equipped with a third elastomer assembly. Detailed implementation manners

[0036] The following will describe in detail the preferred embodiments of the present invention with reference to the accompanying drawings, so as to more clearly understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not limitations on the scope of the present invention, but only to illustrate the essential spirit of the technical solution of the present invention.

[0037] In the following description, for the purpose of illustrating various disclosed embodiments, certain specific details are set forth to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments can be practiced without one or more of these specific details. In other instances, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail so as to avoid unnecessarily obscuring the description of the embodiments.

[0038] References to "an embodiment" or "one embodiment" throughout the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of "in an embodiment" or "in one embodiment" throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0039] In the following description, in order to clearly show the structure and working mode of the present invention, many directional terms will be used for description. However, words such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be construed as limiting terms.

[0040] Figure 1 It is an exploded perspective view of a lens driving mechanism 100 according to an embodiment of the present invention. As Figure 1As shown in the figure, the lens driving mechanism 100 of an embodiment of the present invention includes a housing 10, an upper spring piece 20, a magnet group 30, a carrier 40, a lower spring piece 50, a base 60, and a metal piece 70 embedded in the base. The metal piece 70 embedded in the base is disposed within the base 60. The magnet group 30 is fixedly installed on the housing 10 or the base 60. The carrier 40 is used for installing a lens and is provided with a coil corresponding to and cooperating with the magnet group 30. The upper spring piece 20 movably connects the upper surface of the carrier 40 to the housing 10, and the lower spring piece 50 movably connects the lower surface of the carrier 40 to the base 60. The housing 10 and the base 60 cooperate to install the upper spring piece 20, the magnet group 30, the carrier 40, and the lower spring piece 50 within the space defined by the cooperation of the housing 10 and the base 60. When the coil within the carrier 40 is energized, it interacts with the magnetic field formed by the magnet group 30 to drive the carrier 30 and thereby drive the lens installed within the carrier 30, thus realizing functions such as autofocus or optical image stabilization.

[0041] During the operation of the carrier 30, it may collide with the inner wall of the housing 10 or the base, etc. When colliding with the inner wall of the housing 10, fine particles will be generated. These particles will interfere with the imaging of the lens and affect the imaging effect. Therefore, the present invention adds an elastomer on the housing 10 and / or the base 60 and / or the carrier 40 to prevent the carrier 40 from directly contacting the housing 10 or the base 40, thereby avoiding this situation and achieving a higher quality imaging effect.

[0042] The following will introduce in detail the housing 10, the carrier 40, and the base 60 of different embodiments of the present invention with reference to the accompanying drawings.

[0043] Figure 2 is a perspective view of the housing 10, Figure 3 is a bottom view of the housing 10, Figure 4 is a top view of the housing 10. As Figures 2 - 4 shown, the housing 10 includes a housing top 11 and a housing side 12. A top opening 13 is formed in the middle of the housing top 11. The housing side 12 is integrally formed with the housing top 11 and extends substantially perpendicular to the housing top 11 towards the base. The housing top 11 has a rectangular structure as a whole, and each side of the rectangular structure is connected to a housing side 12, forming a housing top 11 and four housing sides 12 as a whole.

[0044] Four corners of the top 11 of the housing sink towards the base 60 to form sunken portions 14, and an elastomer mounting portion 15 is formed between every two sunken portions 14. The elastomer mounting portions 15 and the sunken portions 14 are arranged around the top opening 13. A first elastomer 90 is provided on the elastomer mounting portion 15. Among them, the top 11 of the housing has a lower surface 112 facing the base 40 and an upper surface 111 opposite to the lower surface 112. The first elastomer 90 is disposed on the lower surface 112 of the top 11 of the housing, specifically, the lower surface of the elastomer mounting portion 15, so as to prevent the carrier 40 from directly contacting the lower surface 112 of the top of the housing 10 during movement.

[0045] In Figures 2 - 4 In the illustrated embodiment, one first elastomer 90 is provided on each elastomer mounting portion 15, so that four first elastomers 90 are provided on the lower surface 112 of the top 11 of the housing 10. That is to say, one first elastomer 90 is provided between every two sunken portions 14. It should be noted that those skilled in the art can understand that multiple first elastomers can also be provided on each elastomer mounting portion 15.

[0046] Figures 5 - 6 They are respectively the bottom view and the top view of the housing 10, and the first elastomer 90 is not installed. Combining Figures 2 - 6 , each elastomer mounting portion 15 of the housing 10 is provided with an elastomer mounting hole 151. The first elastomer 90 includes a main body 91 and a connecting portion 92. The connecting portion 92 is disposed in the elastomer mounting hole 151, and the main body 91 is arranged on the second surface 112 of the top 11. By adding the connecting portion 92 and the elastomer mounting hole 151, the first elastomer 90 can be fixed to the bottom of the elastomer mounting portion 15. Specifically, each elastomer mounting hole 151 extends from the upper surface 111 of the top 11 of the housing to the lower surface 112 of the top 11 of the housing and forms a first opening 113 on the upper surface 111 and a second opening 114 on the lower surface 112. The elastomer mounting hole 151 has an inclined inner wall, so that the first opening 113 of the elastomer mounting hole 151 close to the upper surface 111 is larger, and the second opening 114 close to the lower surface 112 is smaller.

[0047] Referring to Figures 2 - 3, the width of the main body 91 of each first elastomer 90 is equal to the width of the elastomer mounting portion 15, that is, the main body 91 of the first elastomer 90 covers the lower surface of the elastomer mounting portion 15 along the width direction of the elastomer mounting portion 15. Preferably, the outer side of the main body 91 of the first elastomer 90 has a shape matching the circumference of the top opening 13 of the housing 10 and is aligned with the circumference of the top opening 13. Thus, during the movement of the carrier 40, it will only contact the main body 91 of the first elastomer 90, effectively avoiding the collision between the carrier 40 and the housing 10. In addition, in order to effectively prevent the carrier 40 from colliding with the lower surface 112 of the top of the housing 10, the thickness of the main body 91 of the first elastomer 90 is preferably greater than a certain value, such as greater than or equal to the thickness of the lower housing 10, etc.

[0048] The method of setting the first elastomer 90 on the housing 10 by injection molding is introduced below. The elastomer mounting hole 151 on the housing 10 is also called an injection hole. By injecting elastomer material into the elastomer mounting hole 151 from the upper surface 111 of the top 11 of the housing 10, the main body 91 of the first elastomer 90 is formed on the lower surface 112 of the top 11 of the housing 10 and the connecting portion 92 of the first elastomer 91 is formed in the elastomer mounting hole 151. The first elastomer 90 can be made of thermoplastic polyurethane elastomer rubber (TPU) for example. The molten TPU is injected through the first opening 131 of the elastomer mounting hole 151 and flows into the lower surface 112 of the housing 10 and the main body 91 of the first elastomer 90 is formed on the elastomer mounting portion 15.

[0049] The following is combined with Figures 7 - 9 to describe the base of the present invention. Among them, Figure 7 is the top view of the base embedded with the metal sheet 70, Figure 8 is the bottom view of the base embedded with the metal sheet 70, Figure 9 is the top view of the base 60. As Figures 7 - 9 shown, the base 60 includes a base main body 61 and a base embedded metal sheet 70 disposed in the base main body 61. The base embedded metal sheet 70 generally forms a substantially ring shape and has a metal sheet upper surface 71 facing the lower surface of the carrier and a metal sheet lower surface 72 opposite to the metal sheet upper surface 71. The second elastomer 80 is provided on the metal sheet upper surface 71 to prevent the carrier 40 from directly contacting the base 60 during movement.

[0050] In one embodiment, the base embedded metal sheet 70 is provided with a plurality of second elastomer mounting holes 73, and the plurality of second elastomer mounting holes 73 extend from the upper surface 71 to the lower surface 72 of the base embedded metal sheet 70. Specifically, an opening 74 is formed in the middle of the base embedded metal sheet 70, and a plurality of second elastomer mounting portions 75 surround the opening 74 in the middle. The plurality of second elastomer mounting portions 75 are preferably symmetrically arranged on the annular base embedded metal sheet 70 and arranged in pairs opposite to each other. Adjacent two second elastomer mounting portions 75 are connected by a connecting portion 76. The width of the second elastomer mounting portion 75 is greater than the width of the connecting portion 76 to facilitate the installation of the second elastomer 80. Two second elastomer mounting holes 73 are provided on each second elastomer mounting portion 75. Correspondingly, the second elastomer 80 includes an integrally formed main body portion 81 and a fixing portion 82. The fixing portion 82 integrally projects from the surface of the main body portion 81 and is used to cooperate with the second elastomer mounting hole 73 on the base embedded metal sheet 70. During installation, the fixing portion 82 is inserted into the second elastomer mounting hole 73, and the main body portion 81 is arranged on the second elastomer mounting portion 75. The fixing portion 82 can be a connecting column. For example, two connecting columns integrally project from the surface of the main body portion 81. That is to say, one second elastomer 80 includes one main body portion 81 and two connecting columns 82. Correspondingly, two second elastomer mounting holes 73 are provided on each second elastomer mounting portion 75, and the two connecting columns extend into the two second elastomer mounting holes 73 for fixation.

[0051] In one embodiment, the second elastomer mounting hole 73 has an inclined inner surface such that the portion of the second elastomer mounting hole 73 close to the upper surface 71 of the metal sheet has a larger radius, and the portion close to the lower surface 72 of the metal sheet has a smaller radius, thereby facilitating the insertion of the fixing portion 82 of the second elastomer 80 into the second elastomer mounting hole 73.

[0052] Refer to Figure 9 , an opening 62 is provided at the place corresponding to the main body portion 81 of the second elastomer 80 on the base 60, so that when the base embedded metal sheet 70 is installed in the base main body 61, the main body portion 81 of the second elastomer 80 installed on the base embedded metal sheet 70 protrudes from the upper surface of the base 60. When the carrier 40 moves towards the base 60, it first contacts the second elastomer 80. Since the second elastomer 80 has a certain thickness, it can effectively prevent the carrier 40 from directly hitting the base 60, effectively preventing damage to the carrier 40 and avoiding small particles generated during the impact from soiling the lens and affecting the imaging effect.

[0053] Next, in conjunction with Figures 10 - 13 describe the carrier 40 and its manufacturing method according to an embodiment of the present invention. Figure 10 is a top view of the carrier 40 according to an embodiment of the present invention, Figure 11 is a bottom view of the carrier 40 according to an embodiment of the present invention. AsFigures 10 - 11 As shown, a lens mounting hole 41 for mounting a lens is provided in the middle of the carrier 40. A main body portion 42 of the carrier is formed around the lens mounting hole 41 and has an upper surface 421 and a lower surface 422 of the carrier. A plurality of upper spring piece connection portions 423 are provided on the upper surface 421 of the carrier, and a plurality of lower spring piece connection portions 424 are provided on the lower surface 422 of the carrier. Third elastic bodies 43 are also provided on the upper surface 421 and the lower surface 422 of the carrier to prevent the upper surface 421 of the carrier from directly contacting the inner surface of the housing 10 and to prevent the lower surface 422 of the carrier from directly contacting the upper surface of the base 60. It should be noted that although the carrier 40 described here is provided with third elastic bodies on both the upper surface and the lower surface of the carrier, however, those skilled in the art can understand that as long as a third elastic body is provided on one of the upper surface and the lower surface of the carrier, the technical effects of the present invention can be achieved to a certain extent. For example, only providing a third elastic body on the upper surface 421 of the carrier can prevent the carrier 40 from colliding with the inner surface of the housing, and only providing a third elastic body on the lower surface 422 of the carrier can prevent the carrier 40 from colliding with the upper surface of the base.

[0054] In one embodiment, the carrier 40 is provided with an elastomer mounting hole 44. The elastomer mounting hole 44 extends from the upper surface 421 of the carrier to the lower surface 422 of the carrier and forms an upper opening on the upper surface 421 of the carrier and a lower opening on the lower surface 422 of the carrier. The third elastic body 43 is disposed in the elastomer mounting hole 44 and protrudes upward from the upper surface 421 of the carrier and downward from the lower surface 422 of the carrier. That is to say, the elastomers provided on the upper surface 421 of the carrier and the lower surface 422 of the carrier are the two ends of the same elastic body. However, those skilled in the art can understand that the elastomers provided on the upper surface 421 of the carrier and the lower surface 422 of the carrier can also be independent of each other. That is to say, the elastomers provided on the upper surface 421 of the carrier and the lower surface 422 of the carrier are respectively different elastic bodies.

[0055] Refer to Figures 10 - 11 , the upper opening of the elastomer mounting hole 43 is disposed in the upper spring piece mounting portion and avoids the contact position between the upper spring piece and the upper surface of the carrier, and the lower opening of the elastomer mounting hole 43 is disposed in the lower spring piece mounting portion and avoids the contact position between the lower spring piece and the lower surface of the carrier. Thus, the connection between the upper spring piece and the lower spring piece is not affected by the provision of the third elastic body. In one embodiment, a plurality of elastomer mounting holes 43 are uniformly arranged around the lens mounting hole 41 of the carrier 40, so as to effectively prevent the carrier 40 from colliding with the housing and the base while reducing the amount of the elastic body used.

[0056] In one embodiment, the upper reed mounting portion 423 is formed to protrude a certain distance from the upper surface 421 of the carrier 40. A sunken portion 425 is formed between two adjacent upper reed mounting portions. Each upper reed mounting portion 423 is provided with an elastomer mounting hole 43. Similarly, the lower reed mounting portion 424 is also formed to protrude a certain distance from the lower surface 422 of the carrier 40. A sunken portion 426 is formed between two adjacent lower reed mounting portions. Each lower reed mounting portion 424 is provided with an elastomer mounting hole 43.

[0057] In one embodiment, a side hole (not shown in the figure) is formed at a position of the elastomer mounting hole 43 close to the upper surface 421 of the carrier. The side hole communicates with the elastomer mounting hole 43, and a third elastomer is filled in the elastomer mounting hole 43 and the side hole.

[0058] Refer to Figure 11 , in one embodiment, an arc-shaped protruding block 441 is provided at the upper end of the elastomer 44. The side hole has an arc-shaped peripheral portion, and the arc-shaped protruding block 441 is arranged in the side hole (not shown in the figure) of the carrier 40. During the manufacturing process of the third elastomer 43, the side hole can be used as an injection hole for the third elastomer.

[0059] Next, a manufacturing method of the carrier 40 according to an embodiment of the present invention will be introduced in conjunction with Figures 12 - 13 Figure Figure 12 is a top view of a third elastomer assembly formed by positioning a plurality of third elastomers according to an embodiment of the present invention, Figure 13 and Figures 12 - 13 is a top view of the carrier with the third elastomer assembly installed. As shown in

[0060] Refer to Figure 12 and 13 , in one embodiment, a plurality of third elastomers 44 are positioned by a tape 45. After the carrier 40 is formed, the third elastomers 44 and a part of the tape are retained in the carrier 40. For example, the carrier 40 includes four third elastomers 44. The tape 45 has a rectangular frame structure. Four corner portions of the rectangular frame are connected to the third elastomers 44 through connecting portions 451 to position the third elastomers 44. In one embodiment, a bent portion 452 is provided at the front end of the connecting portion 451. An annular ring 453 is provided on the bent portion 452. The annular ring 453 surrounds the third elastomer 44. The outer diameter of the third elastomer 44 is matched with the inner diameter of the annular ring 453. The protruding block 441 of the third elastomer 44 is located above the annular ring 453.

[0061] Specifically, according to an embodiment of the present invention, the manufacturing method of the carrier 40 may include the following steps:

[0062] Step 1: Refer to Figure 12 , use the strip 45 to fix the third elastomer 44 to obtain an elastomer assembly 46. The elastomer assembly 46 includes a plurality of third elastomers 44 and the strip 45;

[0063] Step 2: Refer to Figure 13 , place the elastomer assembly 46 into a carrier injection mold (not shown in the figure) and inject into the carrier injection mold to generate a carrier 40;

[0064] Step 3: Refer to Figures 10 - 11 , remove the strip located outside the carrier 40 in the strip assembly 46, for example, remove the rectangular frame structure of the strip 45, and retain a part of the connecting portion 451. A plurality of third elastomers 44 are arranged inside the carrier 40 and protrude from the upper surface 421 and the lower surface 422 of the carrier at both ends respectively.

[0065] It should be noted that the elastomers described above, including the first elastomer, the second elastomer, and the third elastomer, can be made of elastic materials. However, preferably, the first elastomer, the second elastomer, and the third elastomer can be made of thermoplastic polyurethane elastomer rubber (TPU).

[0066] It should be noted that the above specifically introduces the housing, the base, and the carrier of the lens driving mechanism in different embodiments of the present invention. These housings, bases, and carriers can belong to the same lens driving mechanism or different lens driving mechanisms. That is to say, the housing of the present invention can be used for other lens driving mechanisms, and this lens driving mechanism does not necessarily have the base and the carrier described in the present invention. Similarly, the base of the present invention can be used for other lens driving mechanisms, and this lens driving mechanism does not necessarily have the housing and the carrier described in the present invention, and the carrier of the present invention can also be used for other lens driving mechanisms, and this lens driving mechanism does not necessarily have the base and the housing described in the present invention. The lens driving mechanism only needs to use any one of the housing, the carrier, and the base described in different embodiments of the present invention to achieve certain technical effects, that is, it can prevent the collision between the base and the carrier or the housing and the carrier to a certain extent. Of course, if the lens driving mechanism simultaneously has the housing, the carrier, and the base described in the above different embodiments, more excellent technical effects can be achieved, and the collision between the carrier and the base and the housing can be completely avoided.

[0067] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A lens driving mechanism, characterized in that, The lens driving mechanism includes a housing, a carrier, a base, an upper spring piece, a lower spring piece, and a magnet group. The magnet group is fixedly installed on the base or the housing. The carrier is provided with a coil corresponding to the magnet group. The upper spring piece movably connects the carrier to the housing, and the lower spring piece movably connects the carrier to the base. Wherein, a plurality of first elastic bodies are provided on the inner surface of the housing to prevent the carrier from directly contacting the inner surface of the housing during operation; The carrier has a carrier upper surface facing the housing and a carrier lower surface facing the base. A plurality of upper spring piece connection parts are provided on the carrier upper surface, and a plurality of lower spring piece connection parts are provided on the carrier lower surface. Third elastic bodies are also provided on the carrier upper surface and the carrier lower surface to prevent the carrier upper surface from directly contacting the inner surface of the housing and prevent the carrier lower surface from directly contacting the upper surface of the base; The carrier is provided with a third elastic body mounting hole that extends from the carrier upper surface to the carrier lower surface and forms an upper opening on the carrier upper surface and a lower opening on the carrier lower surface. The third elastic body is disposed in the third elastic body mounting hole and protrudes upward from the carrier upper surface and downward from the carrier lower surface; The upper spring piece connection part protrudes a certain distance from the carrier upper surface, a sunken part is formed between adjacent two upper spring piece connection parts, and each upper spring piece connection part is provided with a third elastic body mounting hole; The carrier is formed by injection molding, and the third elastic body is formed and disposed in the carrier injection molding die before the carrier is injection molded, and is fixed in the third elastic body mounting hole after the carrier is formed; A plurality of the third elastic bodies are positioned by a strip, and after the carrier is formed, the third elastic bodies and a part of the strip remain in the carrier.

2. The lens driving mechanism according to claim 1, wherein The first elastic body is disposed on the inner surface of the top wall of the housing.

3. The lens driving mechanism according to claim 1, wherein, The top wall of the housing is provided with a plurality of injection holes that penetrate from the upper surface of the top wall to the lower surface of the top wall. The first elastic body is formed by injecting from the upper surface of the top wall to the lower surface of the top wall.

4. The lens driving mechanism according to claim 3, wherein The housing is provided with a central opening that cooperates with the lens. Four side portions and four corner portions are formed around the central opening. The first elastic body is disposed on the inner surfaces of the four side portions, and the four corner portions are sunken to form sunken parts.

5. The lens driving mechanism according to claim 4, wherein Each of the four side portions is provided with two of the injection holes, and the elastic body is formed by injecting through the two injection holes.

6. The lens driving mechanism according to claim 4, wherein, One first elastic body is provided for each side portion, and the first elastic bodies form an integral structure.

7. The lens driving mechanism according to claim 3, wherein, The injection hole has an inclined inner wall such that the opening of the injection hole near the upper surface of the top wall is larger and the opening near the lower surface of the top wall is smaller.

8. The lens driving mechanism according to claim 1, wherein The base is provided with a base-embedded metal sheet, and the base-embedded metal sheet is provided with a second elastic body.

9. The lens driving mechanism according to claim 8, wherein The metal sheet embedded in the base has a metal sheet upper surface facing the lower surface of the carrier and a metal sheet lower surface opposite to the metal sheet upper surface, and the second elastic body is disposed on the metal sheet upper surface and is used to prevent the carrier from directly contacting the metal sheet embedded in the base.

10. The lens driving mechanism according to claim 8, wherein The metal sheet embedded in the base is disposed in the base, and an opening is provided at a position corresponding to the second elastic body on the base, so that the second elastic body protrudes from the upper surface of the base.

11. The lens driving mechanism according to claim 8, characterized in that, The metal sheet embedded in the base is provided with a plurality of second elastic body mounting holes, and the second elastic body is provided with connecting columns, and the connecting columns cooperate with the second elastic body mounting holes to mount the second elastic body on the metal sheet embedded in the base.

12. The lens driving mechanism according to claim 11, wherein, The second elastic body mounting hole has an inclined inner surface, so that a portion of the second elastic body mounting hole close to the metal sheet upper surface has a large radius, and a portion close to the metal sheet lower surface has a small radius.

Images