CN202794665U - Lens driving device - Google Patents

Abstract

A lens driving device, comprising a lens module, a bracket for accommodating the lens module, at least two magnetic steels fixed on the bracket, one end connected to the bracket and the other end connected to the lens module and movable upper spring piece, The bracket includes a frame body and at least two extensions extending from the frame body to a direction away from the frame body, any extension portion includes a side wall and an upper surface connected to the side wall, and the side wall is provided with a fixed magnet. groove. The lens driving device of the utility model can make the positioning of the magnetic steel more accurate, and effectively prevent the displacement of the magnetic steel caused by the force in the process of product assembly and use.

Description

lens drive

【Technical field】

The utility model relates to a driving device, in particular to a lens driving device.

【Background technique】

With the development of camera technology, lens modules are widely used in camera devices for various purposes, and the combination of lens modules with various portable electronic devices such as mobile phones, video cameras, computers, etc., is favored by consumers.

In order to capture images with different magnifications, the lens module usually requires the function of zooming or focal length adjustment to make the image clearer. To realize the zoom function, the distance between the driving lens module and the imaging object needs to be changed.

The lens driving device related to the utility model includes a lens module, a housing for housing the lens module, a coil placed in the housing and held on the lens module, one end fixed to the lens module and the other end fixed to the housing. The spring piece, the magnetic bowl placed in the shell, the magnetic steel accommodated in the magnetic bowl, and the coil placed in the gap of the magnetic bowl cuts the magnetic force line to obtain the driving force. However, during use, the structure of using the magnetic bowl to accommodate the magnetic steel is likely to cause displacement of the magnetic steel due to external force applied to the lens driving device, thereby affecting product performance. At the same time, the traditional lens driving device in the related art has a complicated overall structure and is inconvenient to assemble.

Therefore, it is necessary to improve the lens driving device of the related structure.

【Content of utility model】

The purpose of the utility model is to provide a lens driving device with stable performance and simple assembly.

A lens driving device, comprising a lens module, a bracket for accommodating the lens module, at least two magnetic steels fixed on the bracket, one end connected to the bracket and the other end connected to the lens module and movable upper spring piece, The bracket includes a frame body and at least two extensions extending from the frame body to a direction away from the frame body, any of the extensions includes a side wall and an upper surface connected to the side wall, and any side wall is provided with a fixed magnet. steel grooves.

Preferably, the groove of the extension part penetrates to the upper surface of the extension part.

Preferably, any extension part of the bracket is provided with two grooves, and the two ends of the magnetic steel are respectively inserted into adjacent grooves of two adjacent extension parts.

Preferably, the lens driving device further includes a casing for accommodating the bracket, the casing includes a bottom surface through the center and an outer wall vertically extending from the bottom surface, and the outer wall abuts against the outer surface of the magnetic steel.

Preferably, the upper spring piece includes an outer ring sheathed on the extension part of the bracket, an inner ring separated from the outer ring by a certain distance, and connecting parts respectively connecting the inner ring and the outer ring, and the outer ring is provided with There are an inner wall, an outer wall separated from the inner wall by a certain distance, a connecting wall respectively connecting the inner wall and the outer wall, and a notch recessed from the inner wall to the outer wall and interfering with the side wall of the extension.

Preferably, the lens driving device further includes a body that is in contact with the outer wall of the casing, and the body is provided with a bottom that penetrates through the center and a limiting portion that extends from the bottom toward the bottom surface of the casing.

Preferably, the lens driving device further includes a lower spring piece separated from the upper spring piece by a certain distance, one end is connected to the body and the other end is connected to the lens module. It is composed of half spring sheets that are not electrically conductive.

Preferably, the half-spring sheet includes a half-outer frame, a half-inner ring separated from the half-outer frame, and a half-spring connecting portion respectively connecting the half-outer frame and the half-inner frame, and the half-outer frame is set There is a main frame, a first side frame extending from one end of the main frame, a second side frame separated from the first side frame by a certain distance, a relief part connecting the main frame and the second side frame, and a side frame extending from the first side frame or the second side frame. The frame extends away from the bottom surface of the casing and is connected to the conductive terminal of the external power supply.

Preferably, through holes for accommodating conductive terminals are also provided on the bottom of the body.

The beneficial effect of the utility model is that: the extension part of the bracket is provided with a groove that interferes with the magnetic steel, which can make the positioning of the magnetic steel more accurate, and effectively prevent the magnetic steel from being damaged due to the force during the assembly and use of the product. displacement.

【Description of drawings】

Fig. 1 is the three-dimensional exploded view of the lens driving device of the present invention;

Fig. 2 is a combination diagram of the bracket, the upper spring piece and the housing of the lens driving device of the present invention;

Fig. 3 is a combination diagram of the upper spring piece, the magnetic steel and the bracket of the lens driving device of the present invention;

Fig. 4 is the front view of the upper spring piece of the lens driving device of the present invention;

Fig. 5 is a combination diagram of the lower spring piece and the main body of the lens driving device of the present invention;

6 is a structural diagram of the lower spring piece of the lens driving device of the present invention;

7 is a front view of the body of the lens driving device of the present invention;

FIG. 8 is a combined cross-sectional view of the body and the casing of the lens driving device of the present invention.

【Detailed ways】

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in FIG. 1 , it is a three-dimensional exploded view of the lens driving device of the present invention. The lens driving device 100 includes a housing 3, a bracket 21 accommodated in the housing 3, a lens module 1 accommodated in the bracket 21, and a lens module 1 fixed to the lens. The coil 6 on the module 1, the body 22 connected with the housing 3 to form a storage space, the magnetic steel 4 fixed on the bracket 2, one end connected to the bracket 21 and the other end connected to the lens module 1 and movable An upper spring piece 51 and a movable lower spring piece 52 with one end connected to the body 22 and the other end connected to the lens module 1 at a certain distance from the upper spring piece 51 . It should be noted that the lens module in this embodiment may be a module containing lenses, or a module that has not yet been assembled but can be used to assemble lenses.

As shown in FIG. 1 , the housing 3 includes a square bottom surface 31 through the center, an outer wall 32 extending vertically from the bottom surface 31 , a first chamfer 33 connecting adjacent two outer walls 32 , and a wall surrounded by the outer wall 32 . Containment hole 30.

As shown in Figure 1, Figure 2 and Figure 3, the bracket 21 is provided with a square frame body 212 penetrating through the center, extension parts 211 extending from the frame body 212 to the direction of the lens module 1 on the four corners of the frame body 212 and corresponding The space 7 for accommodating the magnetic steel 4 is between the two extension parts 211 . The extension portion 211 includes a side wall 2110 and an upper surface 2111 connected to the side wall. The side wall 2110 has two grooves 2113 penetrating through the upper surface 2111 for fixing the magnetic steel. Four corners of the frame body 212 are provided with second chamfers 213 abutting against the first chamfers 33 . The frame body 212 abuts against the bottom surface 31 of the housing 3 , and the second chamfer 213 abuts against the first chamfer 33 , thereby fixing the bracket 21 on the housing 3 .

As shown in Figure 1, Figure 2 and Figure 3, the magnetic steel 4 is elongated, including an inner surface 41 close to the lens module 1, an outer surface 42 at a certain distance from the inner surface 41 and connecting the inner surface 41 and the inner surface 41. Several side surfaces 43 of the outer surface 42 . Two ends of the magnetic steel 4 are respectively inserted into adjacent grooves 2113 of two adjacent extension parts 211 . The outer surface 42 abuts against the outer wall 32 of the casing 3 . It should be added that in this embodiment, it is mentioned that extensions are provided at the four corners of the bracket. This is for the convenience of describing the structure of the bracket in this embodiment. It does not mean that four extensions must be provided at the same time. Two or more extensions are possible. Each extension does not necessarily have two grooves, and both ends of the magnetic steel do not necessarily have to be inserted into the grooves of the extension. It is also feasible that only one end is inserted into the groove, and the other end abuts against the extension. In addition, the shape of the magnetic steel does not have to be elongated, and any structure that interferes with the extension of the bracket is feasible. It should also be noted that in this embodiment, it is mentioned that the outer surface of the magnetic steel is in contact with the outer wall of the housing, this is for better fixing the magnetic steel, it does not mean that the magnetic steel must be in contact with the housing, Functioning without a housing is also possible.

As shown in FIGS. 3 and 4 , the upper spring piece 51 includes an outer ring 511 sleeved on the extension portion 211 of the bracket 21, an inner ring 512 spaced a certain distance from the outer ring 511 and connected to the inner ring respectively. 512 and the connecting portion 513 of the outer ring 511. The outer ring 511 is provided with an inner side wall 516, an outer side wall 515 separated from the inner side wall 516 by a certain distance, a connecting wall 517 connecting the inner side wall 516 and the outer side wall 515 respectively, and a recessed wall from the inner side wall 516 to the outer side wall 515. The notch 514 interferes with the side wall 2110 of the extension portion 211 . During assembly, the outer ring 511 is sheathed on the extension part 211 , and the notch 514 interferes with the side wall 2110 of the extension part 211 , so that the upper spring piece 51 is fixed on the bracket 21 .

As shown in FIG. 5 and FIG. 6 , the lower spring piece 52 is composed of a first half spring piece 52 a and a second half spring piece 52 b which have the same structure and are not electrically connected to each other. The first half spring piece 52a includes a half outer frame 522 , a half inner ring 521 separated from the half outer frame 522 by a certain distance, and a half spring connecting portion 523 respectively connecting the half outer frame 522 and the half inner ring 521 . The half outer ring frame is provided with a main frame 5221, a first side frame 5222 extending from one end of the main frame 5221, a second side frame 5223 separated from the first side frame 5222 by a certain distance, and connecting the main frame 5221 and the second side frame 5223 The relief portion 525 abutting against the limiting portion 211 of the body 21 and the conductive terminal 524 extending from the first side frame 5222 or the second side frame 5223 away from the bottom surface 31 of the housing 3 to connect to an external power source.

As shown in FIGS. 5 , 7 and 8 , the body 22 is provided with a square bottom 220 penetrating through the center, and a space extending from the bottom 220 toward the bottom surface 31 of the housing 3 to give way to the lower spring piece 52 . The limiting portion 222 abutting against the portion 525 and the through hole 221 passing through the bottom 220 of the body 22 for receiving the conductive terminal 524 . The conductive terminal 524 of the lower spring piece 52 passes through the through hole 221, and at the same time, the relief portion 525 of the lower spring piece 52 abuts against the limit portion 222 of the body 22, thereby realizing the fixing of the lower spring piece 52 . During assembly, the body 22 is accommodated in the receiving hole 30 of the housing 3 and is covered with the housing 3 .

The lens module is respectively accommodated in the bracket and the body through the upper spring piece and the lower spring piece, and the coil is fixed on the lens module and connected to the conductive terminal. When the coil is energized, within the scope of the closed magnetic circuit composed of magnet steel, an electromagnetic force along the optical axis of the lens is generated, and the electromagnetic force overcomes the force of the spring to move the lens module along the optical axis of the lens. The moving position of the lens module can be adjusted by adjusting the magnitude of the energizing current.

The lens driving device of the utility model is provided with grooves that interfere with the magnetic steel on the extension of the bracket, which can make the positioning of the magnetic steel more accurate and effectively prevent the displacement of the magnetic steel caused by the force of the product during assembly and use. .

What has been described above is only the embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims (9)

1. lens driving apparatus, comprise the camera lens module, in order to the support of accommodating the camera lens module, be fixed on that at least two magnet steel, an end on the support links to each other with support that the other end links to each other with the camera lens module and upper spring sheet movably, described support comprise support body and from support body at least two extensions that extend away from the support body direction, it is characterized in that: described arbitrary extension comprises sidewall and the upper surface that is connected sidewall, and described sidewall is provided with the fixedly groove of magnet steel.

2. lens driving apparatus according to claim 1, it is characterized in that: the groove of described extension is through to the upper surface of extension.

3. lens driving apparatus according to claim 1, it is characterized in that: arbitrary extension of described support is provided with two grooves, and adjacent two grooves that extension is adjacent are inserted respectively at the two ends of described magnet steel.

4. lens driving apparatus according to claim 3, it is characterized in that: described lens driving apparatus also comprises the housing of accommodating support, described housing comprise the bottom surface of through and from the bottom surface vertically extending outer wall, described outer wall is connected to the outside surface of magnet steel.

5. lens driving apparatus according to claim 1, it is characterized in that: described upper spring sheet comprise the extension that is set in described support the outer ring, with outer ring inner ring separated by a distance and the connecting portion that is connected respectively described inner ring and outer ring, described outer ring is provided with madial wall, with madial wall lateral wall separated by a distance, be connected the connecting wall of described madial wall and lateral wall and from the breach of direction sidewall interference engagement depression and extension of the outside sidewall of madial wall respectively.

6. lens driving apparatus according to claim 4 is characterized in that: described lens driving apparatus comprises that also the outer wall with housing covers the body that connects mutually, the limiting section that described body is provided with the bottom of through and extends to the direction of the bottom surface of housing from the bottom.

7. lens driving apparatus according to claim 6, it is characterized in that: described lens driving apparatus also comprises with described upper spring sheet separated by a distance, the one end lower spring sheet that the other end links to each other with the camera lens module that links to each other with body, described lower spring sheet is made of two structure half spring leafs identical and that do not conduct each other.

8. lens driving apparatus according to claim 7, it is characterized in that: described half spring leaf comprises the semi outer rings framework, with semi outer rings framework half inner ring separated by a distance and the half spring connecting portion that is connected respectively semi outer rings framework and half inner ring, described semi outer rings framework is provided with main frame, the first body side frame from the extension of main frame one end, with the first body side frame the second body side frame separated by a distance, the section that steps down that connects main frame and the second body side frame be connected the first body side frame or the second body side frame to the conducting terminal that is connected external power source away from the bottom surface direction extension of housing.

9. lens driving apparatus according to claim 6 is characterized in that: also be provided with the through hole that holds conducting terminal on the bottom of described body.

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