KR20110016155A - Camera module - Google Patents

Abstract

PURPOSE: A camera module spreading adhesive in the combination of a holder and a regulating body in the outer circumference of the holder is provided to drop the foreign material to the outside of the holder. CONSTITUTION: A rib(13) is projected to the outside of an upper outline of a lens accommodating part(12). A upper and lower part of an adjacent body(20) is an opened cylindrical shape. A screw part(22) is formed in the inner circumference of a regulating body. A screw part(31) is formed in the top unit of the outer circumference of a holder(30). The holder is combined from the lower side of the regulating body.

Description

Camera module {Camera module}

The present invention relates to a camera module.

Recently, the demand for small camera modules is increasing for various multimedia fields such as notebook personal computers, camera phones, PDAs, smart phones, toys, and image input devices such as surveillance cameras and video terminals of video take recorders. .

As the pixel size of the sensor applied to the camera module is downsized and the height of the module is lowered, management of inflow of foreign matters and securing mechanical reliability of the camera module such as tilt or shift of the lens optical axis The development of mount structures has become a very important topic.

Currently, the biggest influence on the reliability of the camera module is the holder, which mechanically connects the lens barrel and the sensor and protects the sensor from foreign objects and other impacts. In particular, when the lens barrel and the holder are fastened, the reliability is most affected.

Conventionally, a screw coupling method is used to fasten the lens barrel and the holder, and foreign substances generated by the friction of the screw thread are dropped into the holder during screwing, thereby causing a defect due to foreign substances.

The present invention provides a camera module that prevents foreign matter from entering into the holder.

According to one feature of the invention, an incident hole for passing the optical image of the subject is formed in the upper portion and a cylindrical lens receiving portion for accommodating a plurality of lenses therein and a lens protruding rib formed outside the upper edge of the lens receiving portion The barrel has a cylindrical shape with an open top and bottom, the inner diameter of which is smaller than the outer diameter of the rib, and the lower surface of the rib of the lens barrel is adhered to the upper surface, and the inner circumferential adjuster is formed with a screw, the upper portion of the outer peripheral surface A screw module corresponding to the screw portion of the body is formed, and a camera module including a holder coupled to the inside of the body from the bottom side of the body is provided.

In an embodiment of the present invention, a screw portion is formed on the outer circumferential surface of the holder, so that foreign matters generated when the adjuster and the screw of the holder are coupled to the outside of the holder can be prevented from defect due to the foreign matter.

In addition, the adhesive is applied to the outer circumferential surface of the holder in the process of coupling the adjuster and the holder in the focal position, to prevent burns generated by the adhesive flow into the holder, the gas generated during the curing of the adhesive flows into the holder Can be prevented.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Now, a camera module according to an embodiment of the present invention will be described in detail with reference to the drawings. The same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted.

1 is an exploded perspective view of a camera module according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the assembly process of the camera module according to an embodiment of the present invention, Figure 3 is a camera module according to an embodiment of the present invention It is a cross section.

As shown in FIG. 1, the camera module of the present invention includes a lens barrel 10, an adjuster 20, and a holder 30.

The lens barrel 10 has an entrance hole 11 through which an optical image of a subject passes, and a plurality of lenses (not shown) which are stacked in the optical axis direction and transmit the optical image to the image sensor 40. ), A cylindrical lens housing portion 12 is formed.

The rib 13 protrudes outward from the upper edge of the lens housing portion 12. In order for the rib 13 to contact the top surface of the adjuster 20, the rib 13 of the lens barrel 10 should be designed such that its outer diameter is larger than the inner diameter of the adjuster 20.

The adjuster 20 has a cylindrical shape with upper and lower openings, the inner diameter of which is smaller than the outer diameter of the rib 13 of the lens barrel 10, and the upper end 21 of the adjuster 20 is formed of the rib 13. It adheres to the lower surface.

In the present invention, in order to more firmly bond the adjusting body 20 and the lens barrel 10, as shown in FIG. 2, the interview area (the upper surface 21 of the adjusting body 20 and the ribs 13) Apply an adhesive such as UV epoxy to A). In this case, the interview area A may be applied to the entire upper surface 21 of the adjuster 20, and the adhesive may be applied to the entire upper surface 21 or only to a partial region of the upper surface 21.

On the inner circumferential surface of the adjuster 20, a threaded portion 22 screwed with the threaded portion 31 of the holder 30 is formed. The screw portion 22 may be formed over the entire inner circumferential surface, but in the present invention, the screw portion 22 is illustrated as being formed on a portion of the lower side of the inner circumferential surface. The screw portion 22 is formed to the minimum within the limit including the allowable focal length allowance in the process of focusing between the plurality of lenses and the image sensor 40.

On the outer circumferential surface of the adjuster 20, a plurality of locking grooves 23 are formed in the optical axis direction x. The adjusting body 20 adjusts the at least one locking groove 23 so that an external jig (not shown) is caught by the locking groove 23 in the process of focusing the lens and the image sensor 40. On the outer circumferential surface.

In the present invention, the user can screw the adjuster 20 to the holder 30 using a jig, so that the focus position of the camera module can be adjusted more easily.

The holder 30 is divided into an upper side in which the screw part 31 is formed on the outer circumferential surface of the step 32, and a lower side of the rectangular parallelepiped in which the image sensor 40 is built.

The image sensor 40 is a sensor for converting an optical image incident through a plurality of lenses into an electrical image. In the present invention, a plurality of lenses and an image sensor are used by using a screw coupling between the adjuster 20 and the holder 30. Focus between 40.

More specifically, with reference to Figure 2 will be described the assembly and focus adjustment method of the camera module of the present invention.

The lens barrel 10 is inserted into the adjusting body 20 from the upper side of the adjusting body 20, and an adhesive is applied to the area A so that the lens barrel 10 is fixed to the adjusting body 20.

And the holder 30 is engaged inward of the adjuster 20 from the lower side of the adjuster 20. In this case, the inner circumferential surface of the holder 30 is interviewed with the outer circumferential surface of the lens barrel 10, or the inner circumferential surface of the holder 30 is assembled to face away from the outer circumferential surface of the lens barrel 10 at a predetermined interval.

The user checks the focus between the plurality of lenses and the image sensor 40 while rotating the adjuster 20 or rotates the holder 30, and adjusts the adjuster to the focus position between the plurality of lenses and the image sensor 40. Screw the (20) and the holder (30).

After screwing the adjuster 20 and the holder 30 in the focal position, an adhesive such as UV epoxy is applied to the area B between the lower end 24 and the step 32 of the adjuster 20. Then, the adjuster 20 and the holder 30 can be fixed at the focus position.

As described above, in the embodiment of the present invention, the threaded portion is formed on the outer circumferential surface of the holder 30, so that foreign matters generated during screwing of the adjuster 20 and the holder 30 fall to the outside of the holder to prevent defects caused by foreign matters. can do.

In addition, the adhesive is applied to the outer circumferential surface of the holder 30 in the process of coupling the adjuster 20 and the holder 30 in the focal position, to prevent the adhesive flows into the holder to prevent burns, The generated gas can be prevented from flowing into the holder.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is an exploded perspective view of a camera module according to an embodiment of the present invention.

2 is a cross-sectional view illustrating an assembly process of a camera module according to an exemplary embodiment of the present invention.

3 is a cross-sectional view of a camera module according to an embodiment of the present invention.

Claims (5)

An incident hole through which an optical image of the subject passes through is formed in the upper portion and a lens barrel having a cylindrical shape accommodating a plurality of lenses therein, and a lens barrel having ribs protruding outward from an upper edge of the lens receiving portion, An adjuster having a cylindrical shape having upper and lower openings whose inner diameter is smaller than the outer diameter of the rib of the lens barrel, and the lower surface of the rib is adhered to the upper surface, and the threaded portion is formed on the inner circumferential surface; The upper part of the outer peripheral surface is formed with a screw portion corresponding to the threaded portion of the adjusting body, the camera module including a holder coupled to the inside of the adjusting body from the lower side of the adjusting body. The method of claim 1, A camera module, wherein an adhesive is applied to a part of the surface where the rib and the top surface of the adjuster are interviewed. The method of claim 1, The holder has a stepped step formed on the lower side of the outer circumferential surface formed with the screw portion, the camera module is coated with an adhesive between the lower end of the adjuster and the stepped step of the holder. The method of claim 1, The inner circumferential surface of the holder is interviewed with the outer circumferential surface of the lens barrel. The method of claim 1, The inner circumferential surface of the holder is spaced apart from the outer circumferential surface of the lens barrel at a predetermined interval.

Images