TWI459064B - Lens module and camera module using same - Google Patents

Description

Lens module and camera module for its application

The invention relates to a lens module and a camera module thereof.

With the development of camera technology, camera modules are widely used in camera devices for various purposes. The camera module usually includes a lens holder and a lens barrel. The image sensor is mounted in the lens holder and the lens is assembled in the lens barrel. Nowadays, the mirror base and the lens barrel are usually threaded, but the threaded structure requires the internal thread and the external thread to match each other in the thread shape and the thread pitch. Therefore, to process the high precision thread, high precision is required. The mold greatly increases the production cost. In order to properly reduce the production cost, the manufacturer generally uses ordinary molds for thread processing, but the precision of the thread processed by the ordinary mold is not high, so that the coaxiality of the lens and the image sensor is generated after the lens holder and the lens barrel are processed and assembled. deviation.

In view of this, it is necessary to provide a lens module capable of effectively ensuring the coaxial precision of the lens and the image sensor and a camera module thereof.

A lens module includes a lens holder, a lens barrel and at least one lens located in the lens barrel. A through chamber is formed in the lens holder, and the chamber includes a first accommodating cavity for arranging the lens barrel. The cavity wall of the first accommodating cavity includes a first mating wall adjacent to the object side of the lens module. The first mating wall is a continuous smooth curved surface. The lens barrel includes a locking portion adjacent to an object side of the lens module. The card At least three positioning bumps are disposed on the side surface of the portion. The outer surfaces of the at least three positioning lugs are on the same circumference. An inner diameter of the first mating wall of the lens holder is equal to an outer diameter of the positioning bump.

A camera module includes a lens module, an image sensor, a substrate and a light transmissive component. The image sensor is disposed on the substrate and electrically connected to the substrate. The lens module is opposite to the image sensor and is fixed on the substrate. The light transmissive element is opposite to the image sensor and is fixed in a chamber of the lens module. The lens module includes a lens holder, a lens barrel and at least one lens located in the lens barrel. A through chamber is formed in the lens holder, and the chamber includes a first accommodating cavity for arranging the lens barrel. The cavity wall of the first accommodating cavity includes a first mating wall adjacent to the object side of the lens module. The first mating wall is a continuous smooth curved surface. The lens barrel includes a locking portion adjacent to an object side of the lens module. At least three positioning protrusions are disposed on a side surface of the locking portion. The outer surfaces of the at least three positioning lugs are on the same circumference. An inner diameter of the first mating wall of the lens holder is equal to an outer diameter of the positioning bump.

The lens module of the present invention and the camera module of the same, wherein at least three positioning protrusions are disposed on a side surface of the top of the lens barrel, and an inner diameter of the first matching wall of the lens holder is equal to the positioning convex The outer diameter of the block can effectively improve the coaxial accuracy of the lens and the image sensor.

100‧‧‧ camera module

10‧‧‧Lens module

11‧‧‧Mirror seat

12‧‧‧Mirror tube

13‧‧‧ lenses

20‧‧‧Image Sensor

30‧‧‧Substrate

40‧‧‧Lighting components

111‧‧ ‧ room

112‧‧‧First accommodation cavity

113‧‧‧Second accommodating chamber

114‧‧‧ cavity wall

114a‧‧‧First mating wall

114b‧‧‧Second mating wall

121‧‧‧Card Department

121a‧‧‧ side surface

122‧‧‧ screw joint

124‧‧‧focusing bump

124a‧‧‧ Sidewall

125‧‧‧ positioning bumps

125a‧‧‧ outer surface

1 is an exploded perspective view of a camera module according to an embodiment of the present invention; and FIG. 2 is a cross-sectional view of the camera module of FIG. 1.

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

1 and FIG. 2 , a camera module 100 includes a lens module 10 , an image sensor 20 , a substrate 30 , and a light transmissive element 40 . The image sensor 20 is disposed on the substrate 30 and electrically connected to the substrate 30. The lens module 10 is opposite to the image sensor 20 and is fixed on the substrate 30. The light transmissive element 40 is opposite to the image sensor 20 and is fixed in the lens module 10 . In the embodiment, the light transmissive element 40 is an infrared filter.

The lens module 10 includes a lens holder 11 , a lens barrel 12 and at least one lens 13 . The lens barrel 12 is sleeved in the lens holder 11 , and the at least one lens 13 is disposed in the lens barrel 12 .

The lens holder 11 is a cylindrical structure in which a through chamber 111 is formed. The light transmissive element 40 is fixed in the chamber 111 to divide the chamber 111 into a first accommodating cavity 112 and a second accommodating cavity 113. The first accommodating cavity 112 is adjacent to the object side of the lens module 10 , and the second accommodating cavity 113 is adjacent to the image side of the lens module 10 . The first accommodating cavity 112 is for accommodating the lens barrel 12 . The cavity wall 114 of the first accommodating cavity 112 includes a first mating wall 114a and a second mating wall 114b. The first mating wall 114a is a continuous smooth curved surface. The second mating wall 114b is internally threaded. The second accommodating cavity 113 is configured to receive the image sensor 20 .

The lens barrel 12 includes a locking portion 121 and a screw portion 122. The locking portion 121 is adjacent to the object side of the lens module 10 , and the screwing portion 122 is adjacent to the image side of the lens module 10 . At least three focus bumps 124 are disposed on the side surface 121a of the locking portion 121. In the embodiment, the number of the focusing bumps 124 is three. The three focus bumps 124 are equally spaced. And the side walls 124a of the three focus bumps 124 facing the lens holder 11 are all located on the same circumference. Side of each focus bump 124 A positioning protrusion 125 is disposed on the wall 124a. The outer surfaces 125a of the three positioning projections 125 are located on the same circumference. The inner diameter of the first mating wall 114a of the lens holder 11 is equal to the sum of the outer diameter of the focusing bump 124 and the radial thickness of the positioning bump 125, thereby ensuring the lens 13 and the image sensor 20. Coaxial accuracy. At the same time, since the contact bump 125 is in contact with the first mating wall 114a of the lens holder 11 , the contact area between the external thread and the internal thread when the lens barrel and the lens holder are threaded by the prior art is small. There are many, so that the friction between the lens barrel 12 and the lens holder 11 during the focusing process can be reduced. The threaded portion 122 is provided with an external thread loosely coupled with the internal thread on the second mating wall 114b of the lens holder 11 so that the lens barrel 12 can be along the first receiving cavity 112 of the lens holder 11 The optical axis direction moves slowly and evenly, thereby facilitating more accurate focusing of the camera module 100. In the embodiment, the focus bump 124 and the lens barrel 12 are integrated. The positioning protrusion 125 and the focusing protrusion 124 are of a unitary structure.

It can be understood that the positioning protrusions 124 are not disposed, and the positioning protrusions 125 are directly disposed on the side surface 121a of the locking portion 121 of the lens barrel 12. At this time, the first stage of the lens holder 11 The inner diameter of a mating wall 114a is equal to the outer diameter of the positioning protrusion 125 to ensure the coaxial precision of the lens 13 and the image sensor 20.

The assembly process of the camera module 100 is as follows. The lens barrel 12 is placed in the lens holder 11 and then clamped at a gap between adjacent focus bumps 124 by a pair of dice (not shown). Rotating the lens barrel 12 slowly, since the inner diameter of the first mating wall 114a of the lens holder 11 is equal to the sum of the outer diameter of the focusing bump 124 and the radial thickness of the positioning bump 125, The coaxial precision of the lens 13 and the image sensor 20 can be ensured, and at the same time, due to the limitation of the external thread of the screw portion 122 of the lens barrel 12 and the internal thread of the second mating wall 114b of the lens holder 11, The lens barrel 12 is slow and uniform within the lens holder 11 The drop is continued until the lens barrel 12 is rotated into a suitable position in the lens holder 11.

In the camera module of the present invention, at least three focus bumps are disposed on a side surface of the carding portion, and a positioning bump is disposed on a sidewall of the focus bump, and the first of the lens holders The inner diameter of the matching wall is equal to the sum of the outer diameter of the focusing protrusion and the radial thickness of the positioning protrusion, so that the coaxial precision of the lens and the image sensor can be effectively improved.

In addition, those skilled in the art can make other changes in the spirit of the invention, and all changes that are made according to the spirit of the invention should be included in the scope of the invention.

100‧‧‧ camera module

10‧‧‧Lens module

11‧‧‧Mirror seat

12‧‧‧Mirror tube

13‧‧‧ lenses

20‧‧‧Image Sensor

30‧‧‧Substrate

40‧‧‧Lighting components

111‧‧ ‧ room

112‧‧‧First accommodation cavity

113‧‧‧Second accommodating chamber

114‧‧‧ cavity wall

114a‧‧‧First mating wall

114b‧‧‧Second mating wall

121‧‧‧Card Department

121a‧‧‧ side surface

122‧‧‧ screw joint

124‧‧‧focusing bump

124a‧‧‧ Sidewall

125‧‧‧ positioning bumps

125a‧‧‧ outer surface

Claims (8)

A lens module includes a lens holder, a lens barrel and at least one lens located in the lens barrel, wherein the lens holder forms a through chamber, and the chamber includes a lens barrel a first accommodating cavity, the cavity wall of the first accommodating cavity includes a first mating wall adjacent to an object side of the lens module, the first mating wall is a continuous smooth curved surface, the mirror The cartridge includes a locking portion adjacent to the object side of the lens module, and at least three focusing protrusions are disposed on a side surface of the locking portion, and sidewalls of the at least three focusing protrusions are located on a same circumference. A positioning protrusion is disposed on a sidewall of the focusing protrusion, and an outer surface of the at least three positioning protrusions is located on a same circumference, and an inner diameter of the first matching wall of the lens holder is equal to the focusing convex The sum of the outer diameter of the block and the radial thickness of the positioning bump. The lens module of claim 1, wherein the at least three focus bumps are equally spaced. The lens module of claim 1, wherein the cavity wall of the first accommodating cavity further comprises a second mating wall adjacent to the image side of the lens module, the second mating wall An internal thread is provided, the lens barrel includes a screwing portion adjacent to the image side of the lens module, and the screwing portion is provided with an external thread that cooperates with an internal thread of the second mating wall. The lens module of claim 3, wherein the external thread of the screw portion and the internal thread of the second mating wall of the lens holder are loosely matched. A camera module includes a lens module, an image sensor, a substrate and a light transmissive component, and the image sensor is disposed on the substrate and electrically connected to the substrate, wherein The camera module further includes a lens module, the lens module includes a lens holder, a lens barrel and at least one lens located in the lens barrel, and a through chamber is formed in the lens holder. The chamber includes a first accommodating cavity for arranging the lens barrel, and the cavity of the first accommodating cavity The wall includes a first mating wall adjacent to the object side of the lens module, the first mating wall is a continuous smooth curved surface, and the lens barrel includes a locking portion adjacent to the object side of the lens module. At least three focus bumps are disposed on the side surface of the carding portion, the sidewalls of the at least three focus bumps are located on the same circumference, and a positioning bump is disposed on the sidewall of the focus bump. The outer surfaces of the at least three positioning protrusions are located on the same circumference, and the inner diameter of the first matching wall of the lens holder is equal to the sum of the outer diameter of the focusing protrusion and the radial thickness of the positioning protrusion The lens module is opposite to the image sensor and is fixed on the substrate, and the light transmissive element is opposite to the image sensor and is fixed in the chamber of the lens module. . The lens module of claim 5, wherein the at least three focus bumps are equally spaced. The lens module of claim 5, wherein the cavity wall of the first accommodating cavity further comprises a second mating wall adjacent to the image side of the lens module, the second mating wall An internal thread is provided, the lens barrel includes a screwing portion adjacent to the image side of the lens module, and the screwing portion is provided with an external thread that cooperates with an internal thread of the second mating wall. The lens module of claim 7, wherein the external thread of the screw portion and the internal thread of the second mating wall of the lens holder are loosely matched.