TWI385427B - Lens module and spacer of the same - Google Patents

Description

Lens module and its spacer ring

The invention relates to a lens module assembly technology, in particular to a lens module of a digital camera and a spacer ring thereof.

With the development of multimedia technology, digital cameras and video cameras are increasingly favored by consumers. While people are pursuing miniaturization of digital cameras and cameras, they also hope to have good shooting functions. A lens module with a shooting function generally consists of the most important lens and mechanism components. For a high-quality lens, in order to ensure the image quality of the digital camera, the position between the individual components should be fixed, so a good assembly method should be used for assembly so that the components after assembly are stable and do not fall off. Ensure that the assembled lens has good image quality.

A previous lens module includes a lens barrel, a plurality of lenses, a plurality of spacer rings, and a filter. The lens, the spacer ring, and the filter are all housed in the lens barrel. The spacer ring has an annular shape with a hole in the middle for allowing incident light to penetrate. The filter and the spacer ring are glued together by dispensing with a dispenser.

The filter of the lens module is glued to the spacer ring of the lens, and the method is often caused by deterioration of the adhesive, uneven coating of the adhesive, and curing of the adhesive due to the influence of the filter on the ultraviolet light. Incompletely, the filter is detached from the spacer ring, thereby invalidating the lens module.

In view of the above, it is necessary to provide a lens module and a spacer ring capable of stably fixing the optical element.

A spacer ring includes a cylinder and an annular body fixed to a cross section of the cylinder. A fixing structure is disposed on the sidewall of the cylinder for engaging the annular body to fix the optical component in the cylinder. The annular body axis is in line with the cylinder axis.

A lens module includes a lens barrel, an optical component, and a spacer ring that is received in the lens barrel.

The lens module is composed of a cylinder and an annular body because of its spacer ring, so that the optical component to be assembled is stably fixed in the spacer ring, thereby increasing the product yield.

In order to further illustrate the present invention, a preferred embodiment will be described in detail below with reference to the drawings.

Referring to FIG. 1 and FIG. 2 , the lens module in the embodiment of the present invention includes an optical element such as a lens barrel 10 , a lens group 11 , a filter 12 , and a spacer ring 13 . The lens group 11, the spacer ring 12, and the filter 12 are all housed in the lens barrel 10.

The lens set 11 includes at least one lens 111 and at least one aperture plate 112 for imaging. This embodiment employs two lenses 111 separated by a diaphragm sheet 112.

The filter 12 may be a square body for eliminating color shift caused by infrared rays.

The spacer ring 13 includes a cylinder 131 and an annular body 132. The annular body 132 is fixed to the cross section of the cylinder 131, and the axis of the annular body 132 is aligned with the axis of the cylinder 131. For example, the annular body 132 may be inscribed in the end or the middle portion of the cylindrical body 131. At this time, the diameter of the annular body 132 is equivalent to the inner diameter of the cylindrical body 131, and may be externally connected to the cylindrical body. In addition, the annular body 132 may further extend out of the side wall of the cylindrical body 131, and the diameter of the annular body 132 may be greater than or equal to the outer diameter of the cylindrical body 131. In this embodiment, the annular body 132 is inscribed in the end portion of the cross section of the cylindrical body 131. The spacer ring 13 is for accommodating the filter 12 and is placed on the annular body 132.

An opening 133 is defined in a side wall of the cylindrical body 131 adjacent to the annular body 132. The opening 133 can be used to insert the filter 12 into the cylindrical body 131. The outer diameter of the barrel 131 is equivalent to the inner diameter of the lens barrel 10 in order to fix the spacer ring 13.

The inner side wall of the cylinder 131 is provided with a fixing structure. The fixing structure may be provided with two fixing grooves 134 and 135 with respect to the opening 13 , or may be a clamping member integrally formed with the barrel 131 . The fitting may be a protrusion extending from the inner side of the cylinder for engaging the annular body 13 to fix the filter 12 in the cylinder 131. In this embodiment, two fixing grooves 134, 135 are provided on the inner side wall of the cylindrical body 131.

The fixing grooves 134 and 135 can be set according to the shape of the optical element, and the number can also be set to one or plural as needed.

The annular body 132 is provided with a central hole 136 for injecting incident light, and the edge of the central hole 136 facing the object side is provided as a slope 137, which may be a wedge-shaped slope.

The thickness of the annular body 132, the diameter of the central bore 136, and the angle of the bevel 137 are designed according to different optical design requirements.

Referring to FIG. 1 and FIG. 3 , taking the lens module embodiment as an example, the assembly steps are as follows: first step: providing the lens barrel 10; second step: providing the lens group 11 according to optical design requirements The lens 111 and the aperture sheet 112 are assembled into the lens barrel 10.

The third step: providing a filter 12 and a spacer ring 13, inserting the filter 12 from the opening 133, and fixing any two adjacent corners of the filter 12 to the fixing grooves 134 and 135. . It can be understood that the filter 12 can be directly inserted into the cylinder from the opening of the cylinder 131 of the spacer ring 13.

The fourth step: in order to further fix the position of the filter 12 and the spacer ring 13 without loosening or falling off, a high viscosity coefficient glue 15 is placed in the gap 14 formed by the filter 12 and the barrel 131 of the spacer ring 13 .

Step 5: Curing the high viscosity coefficient glue 15 with ultraviolet light. Since the glue is not covered by the filter 12 and other objects at this time, it is easy to be completely cured.

The sixth step: the above-mentioned spacer ring 13 equipped with the filter 12 is incorporated in the lens barrel 10.

In this way, the assembly of the lens module is completed.

In the sixth step, the spacer ring 13 may be fixed in a tight fit or interference manner with the outer diameter of the spacer ring 13 and the inner diameter of the lens barrel 10, or may be formed by a gap formed between the spacer ring 13 and the lens barrel 10. The spacer ring 13 is fixed by means of glue bonding to ensure that the spacer ring 13 does not fall off, and the spacer ring 13 can accommodate other optical components, such as the lens 111, in addition to the filter 12 . Inside the spacer ring 13.

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 a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. It should be covered by the following patent application.

Tube. . . 10

Lens group. . . 11

lens. . . 111

Aperture piece. . . 112

Filter. . . 12

Spacer ring. . . 13

Cylinder. . . 131

Ring body. . . 132

Opening. . . 133

Fixed slot. . . 134, 135

Center hole. . . 136

Bevel. . . 137

gap. . . 14

glue. . . 15

1 is a perspective exploded view of a lens module according to an embodiment of the present invention; FIG. 2 is a schematic view showing an assembly structure of the filter and the spacer ring illustrated in FIG. 1; FIG. 3 is a cross-sectional view of the lens module illustrated in FIG. Figure.

Tube. . . 10

Lens group. . . 11

lens. . . 111

Aperture piece. . . 112

Filter. . . 12

Spacer ring. . . 13

Cylinder. . . 131

Ring body. . . 132

Opening. . . 133

Fixed slot. . . 134

Center hole. . . 136

Bevel. . . 137

Claims (10)

A spacer ring is improved in that the spacer ring comprises: a cylinder; an annular body fixed to the cross section of the cylinder; the inner wall of the cylinder is provided with a fixing structure for cooperating with the annular body A fixed optical element is disposed within the barrel, the annular body axis being in line with the axis of the barrel. The spacer ring of claim 1, wherein the cylinder of the spacer ring is integrally formed or closely fitted with the annular body. The spacer ring according to claim 1, wherein the annular body has a central hole, and an edge of the central hole is provided as a sloped surface, and the inclined surface is a wedge-shaped inclined surface for incident light to be incident. The spacer ring of claim 2, wherein the side wall of the spacer ring adjacent to the annular body is provided with an opening for inserting the optical component. The spacer ring of claim 4, wherein the fixing structure provided on the inner side wall of the spacer ring is at least one fixing groove or a snap member. The spacer ring of claim 5, wherein the outer diameter of the spacer ring is equal to the maximum diameter of the optical element. A lens module comprising a lens barrel, an optical element, and a spacer ring as claimed in any one of claims 1 to 6 which is accommodated in the lens barrel. The lens module of claim 7, wherein the optical component comprises at least one lens group and at least one filter. The lens module of claim 8, wherein the lens group comprises at least one lens and at least one aperture plate for imaging. The lens module of claim 7, wherein the spacer ring and the optical element housed therein have a gap for injecting an adhesive to bond the optical element to the spacer ring. in.