TWI427349B - Camera module - Google Patents

Description

Camera module

The invention relates to a camera module.

At present, the assembly between the first lens holder (such as a lens barrel or a lens holder) of the camera module and the second lens holder (such as a lens holder or a lens barrel) is generally screwed. However, if the thread or the thread of the first lens holder or the second lens holder is poorly processed, the first lens holder and the second lens holder are screwed together, and the thread and the screw are loose. phenomenon. Therefore, during the zooming process of the camera module, the first lens holder moves along the optical axis of the camera module relative to the second lens holder, and light along the camera module is also displayed. An anomaly in the fine adjustment of the axis direction. In addition, during the other use of the camera module (such as when shooting), due to factors such as human shaking, the first lens holder may also be opposite to the optical axis of the camera module relative to the second lens holder. Fine-tuning anomalies. The anomaly causes an eccentricity of the optical center of the first lens holder and the optical center of the second lens holder, thereby causing concentricity of the camera module assembled by the first lens holder and the second lens holder Degree is reduced.

In view of the above, it is necessary to provide a camera module having better concentricity after assembly of the first lens holder and the second lens holder.

A camera module includes a hollow first lens mount and a hollow second lens mount that is screwed to the first lens mount. The second lens mount includes a hollow cylinder, a positioning ring and a hollow connecting portion. The connecting portion fixes the positioning ring and the cylinder to receive the positioning ring in the cylinder, and the positioning ring is concentric with the cylinder. A groove is formed in an end surface of the first lens holder adjacent to the second lens holder, and the groove is configured to receive the positioning ring to guide the positioning ring to move along the groove.

Compared with the prior art, the camera module is provided with a positioning ring on the second lens holder, and a groove for receiving the positioning ring is disposed on the first lens holder, so that the first lens holder and the first lens holder are After the second lens holder is assembled, the positioning ring is received in the groove and restricts the first lens holder from being finely adjusted relative to the optical axis of the camera module relative to the second lens holder, thereby enabling the first lens holder The optical center of the lens holder and the optical center of the second lens holder are less prone to eccentricity, ensuring that the camera module assembled by the first lens holder and the second lens holder has better concentricity.

The invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a camera module 100 according to a first embodiment of the present invention includes a hollow first lens mount 10 and a hollow second lens fixed to the first lens mount 10 . The holder 12 has an image sensor 15 and a substrate 16 for carrying the image sensor 15. In the embodiment, the first lens holder 10 is a lens barrel, and the second lens holder 12 is a lens holder. The image sensor 15 and the substrate 16 are housed in the second lens holder 12 .

The first lens holder 10 is for housing an optical component, such as a lens 105, a spacer ring 106, and an infrared filter 107. The lens 105 is used to condense light reflected by the object to form an image on the image sensor 15. The spacer ring 106 is disposed between the lens 105 and the infrared filter 107 for separating a distance between the lens 105 and the infrared filter 107 to prevent contact or collision between the two to cause damage. The infrared filter 107 is disposed on a side of the lens 105 adjacent to the image sensor 15 for cutting off the passage of infrared light. The first lens holder 10 includes an outer surface 101 and two opposite end faces 104a, 104b. The outer surface 101 connects the two end faces 104a, 104b, and the outer surface 101 is provided with external threads 102.

The second lens holder 12 includes a hollow cylinder 121, a positioning ring 123 and a hollow connecting portion 124. The cylinder 121 includes an inner surface 121a. The inner surface 121a is provided with an internal thread 121b screwed to the external thread 102 of the first lens holder 10, and the internal thread 121b is loosely fitted with the external thread 102. status. The loosely fitting state of the internal thread 121b and the external thread 102 means that the internal thread 121b and the external thread 102 have a slight gap when radially matched, thereby allowing the first lens holder 10 to be opposite to the second lens holder. 12 can be finely adjusted along the optical axis direction perpendicular to the camera module 100 while moving along the optical axis of the camera module 100. The connecting portion 124 is fixed to the positioning ring 123 and the column 121 to receive the positioning ring 123 in the column 121 , and the positioning ring 123 is concentric with the column 121 . In the embodiment, the connecting portion 124 extends from the inner surface 121a of the cylinder 121 in the direction perpendicular to the optical axis of the camera module 100. The positioning ring 123 is moved from the connecting portion 124 toward the first lens holder. 10 and extending in the optical axis direction parallel to the camera module 100. Therefore, the connecting portion 124, the positioning ring 123 and the pillar 121 are integrally formed. It can be understood that, in other embodiments, the combination of the connecting portion 124, the positioning ring 123 and the pillar 121 may be in the following state: the connecting portion 124 and the pillar 121 are integrally formed; the connecting portion 124 The positioning ring 123 is integrally formed; the connecting portion 124, the positioning ring 123 and the column 121 are separately formed. The length of the positioning ring 123 is not greater than the length of the internal thread 121b on the inner surface 121a. Preferably, the length of the positioning ring 123 is equal to the length of the internal thread 121b on the inner surface 121a.

A groove 103 is defined in the end surface 104b of the first lens holder 10 adjacent to the second lens holder 12. The groove 103 extends vertically along the end surface 104b, and the groove 103 is configured to receive the positioning ring 123 so that the groove 103 guides the positioning ring 123 to move along the groove 103. Preferably, the groove 103 has a ring shape. It can be understood that the depth of the groove 103 is not less than the length of the positioning ring 123. Preferably, the depth of the groove 103 is equal to the length of the positioning ring 123. When the first lens holder 10 and the second lens holder 12 are screwed by the corresponding external thread 102 and the internal thread 121b, the positioning ring 123 of the second lens holder 12 is received in the first lens holder. The groove 103 in the 10, and the groove 103 guides the positioning ring 123 to move only in the direction in which the groove 103 extends. When the camera module 100 is zoomed, the first lens holder 10 is guided by the positioning ring 123 when the first lens holder 10 is moved relative to the second lens holder 12 along the optical axis of the camera module 100. The first lens holder 10 moves along the optical axis of the camera module 100 and restricts the first lens holder 10 from being finely adjusted relative to the second lens holder 12 in a direction perpendicular to the optical axis of the camera module 100. It can be understood that, because the positioning ring 123 limits the fine adjustment of the first lens holder 10 relative to the second lens holder 12 along the optical axis of the camera module 100, the camera module 100 is in use during other uses. (If shooting), the positioning ring 123 also functions as an anti-shake function.

The camera module 100 is provided with a positioning ring 123 on the second lens holder 12, and a recess 103 for receiving the positioning ring 123 is disposed on the first lens holder 10 so that the positioning ring 123 is received therein. The inside of the groove 103 and the first lens holder 10 are finely adjusted relative to the second lens holder 12 in the direction perpendicular to the optical axis of the camera module 100, so that the optical center of the first lens holder 10 and the first lens holder 10 The optical center of the second lens holder 12 is less prone to eccentricity, and the first lens holder 10 and the second lens holder 12 are assembled to have better concentricity.

Referring to FIG. 2 , a camera module 200 according to a second embodiment of the present invention is different from the camera module 100 of the first embodiment in that the positioning ring 223 and the connecting portion 224 of the camera module 200 are disposed on the mirror. On the cylinder 221 (second lens holder) of the cylinder 20, the recess 203 of the camera module 200 is opened on the lens holder 22 (first lens holder).

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

100, 200‧‧‧ camera module
10, 20‧‧‧ first lens mount
15‧‧‧Image Sensor
12, 22‧‧‧ second lens mount
16‧‧‧Substrate
105‧‧‧ lens
106‧‧‧ spacer ring
107‧‧‧Infrared filter
101‧‧‧ outer surface
104a, 104b‧‧‧ end face
102‧‧‧ external thread
121, 221‧‧‧ cylinder
123, 223‧‧‧ positioning ring
124, 224‧‧‧ Connections
103, 203‧‧‧ grooves

FIG. 1 is a schematic structural diagram of a camera module according to a first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a camera module according to a second embodiment of the present invention.

100‧‧‧ camera module

10‧‧‧First lens mount

12‧‧‧Second lens mount

15‧‧‧Image Sensor

16‧‧‧Substrate

105‧‧‧ lens

106‧‧‧ spacer ring

107‧‧‧Infrared filter

101‧‧‧ outer surface

104a, 104b‧‧‧ end face

102‧‧‧ external thread

121‧‧‧Cylinder

123‧‧‧ positioning ring

124‧‧‧Connecting Department

121a‧‧‧ inner surface

121b‧‧‧ internal thread

103‧‧‧ Groove

Claims (10)

A camera module includes a hollow first lens holder and a hollow second lens holder screwed to the first lens holder, the improvement being that the second lens holder comprises a hollow a cylinder, a positioning ring and a hollow connecting portion, the connecting portion is fixed to the positioning ring and the cylinder to receive the positioning ring in the cylinder, and the positioning ring is concentric with the cylinder, the first lens A groove is formed in the end surface of the fixing seat adjacent to the second lens holder, and the groove is used for receiving the positioning ring to guide the positioning ring to move along the groove. The camera module of claim 1, wherein the groove has a ring shape. The camera module of claim 1, wherein the positioning ring and the connecting portion are integrally formed. The camera module of claim 1, wherein the connecting portion and the column are integrally formed. The camera module of claim 1, wherein the positioning ring, the connecting portion and the column are integrally formed. The camera module of claim 5, wherein the connecting portion extends from the cylinder in a direction perpendicular to an optical axis of the camera module, and the positioning ring is fixed by the connecting portion toward the first lens. The seat extends in a direction parallel to the optical axis of the camera module. The camera module of claim 1, wherein the positioning ring, the connecting portion and the column are in a split forming structure. The camera module of claim 1, wherein the first lens holder is a lens barrel, and the second lens holder is a lens holder. The camera module of claim 1, wherein the first lens holder is a lens holder, and the second lens holder is a lens barrel. The camera module of claim 1, wherein the first lens holder and the second lens holder are loosely engaged to adjust the focus of the camera module along the optical axis of the camera module. And along the radial fine adjustment of the camera module to adjust the concentricity of the two.