TWI703362B - Lens module and lens mount - Google Patents

Abstract

A lens module includes a lens mount, at least one lens, and a positioning ring. The lens mount is cylinder-shaped and has an inner face. The inner face encloses a receiving space. The lens mount has a first end and a second end along an axial direction. The inner face includes a positioning section near the first end. The at least one lens is arranged in the receiving space, and the outer peripheral face of the at least one lens contacts the inner face of the lens mount. The positioning ring is arranged in the receiving space, and an outer peripheral face of the positioning ring corresponds to the positioning section to avoid the at least one lens from falling out via the first end. At least one of the positioning section and the outer peripheral face of the positioning ring has at least one spiral groove extending around the axial direction of the lens mount. An end of the at least one spiral groove near the first end is open. The at least one spiral groove is filled up with an adhesive so that the outer peripheral face of the positioning ring is fixed to the inner face of the lens mount.

Description

Lens module and lens mount

The invention relates to a lens module and a lens holder.

Generally speaking, a lens module is composed of a lens mount and lenses. The inner ring surface of the lens mount usually has a plurality of level surfaces for multiple lenses to be positioned in sequence, respectively, so that the distance between the lenses is accurate, and the lens mount The larger inner diameter end of the lens is usually fixed to the inner ring surface of the lens holder with a pressure ring, which not only prevents the lens from falling out, but also further ensures the precise position of each lens and provides a protective effect.

In addition to positioning the pressure ring with a tight fit or a snap-fit structure, there is also an axially extending groove formed at the corresponding position on the inner ring surface of the lens holder, and an adhesive is injected into the groove to fix the pressure ring, as described in patent TW I616698 .

However, the above structure has at least two shortcomings. First, the groove axially penetrates the entire thickness of the pressure ring, and the injected adhesive will overflow to the other side of the pressure ring, where the lens is located, which may cause lens contamination In addition, the provision of these grooves will reduce the direct contact area between the outer ring surface of the pressure ring and the lens mount. Only the adhesive is used to fix it. After the adhesive is used for a long time, the pressure ring may be difficult to fix and then fall off. .

The main purpose of the present invention is to provide a lens module and a lens holder, which can more reliably fix the pressure ring on the inner ring surface of the lens holder, and prevent the adhesive from flowing to the lens and polluting it.

To achieve the above objective, the present invention provides a lens module including a lens holder, at least one lens and a pressure ring.

The lens mount is cylindrical and has an inner ring surface, the inner ring surface encloses an accommodating space, the axial ends of the lens mount are respectively a first end and a second end, the inner ring surface is close to the first end One end includes a stop section; the at least one lens is arranged in the accommodating space and its outer ring surface is in contact with the inner ring surface of the lens mount; the pressure ring is arranged in the accommodating space and its outer ring surface Corresponding to the sealing section of the lens holder to prevent the at least one lens from falling out from the first end of the lens holder; wherein at least one of the sealing section or the outer ring surface of the pressing ring is provided with at least one screw groove, The at least one screw groove extends around the axis of the lens holder and is open near the first end of the lens holder. An adhesive is injected into the at least one screw groove to make the outer ring surface of the pressure ring and the lens holder The inner ring surfaces are fixed to each other.

To achieve the above objective, the present invention further provides a lens holder, which is cylindrical and has an inner ring surface. The inner ring surface encloses an accommodating space for accommodating at least one optical element. A first end and a second end. The inner ring surface near the first end includes a sealing section for contact and positioning of the outer ring surface of the at least one optical element. The sealing section is provided with at least one A screw groove, the at least one screw groove extends around the axial direction of the lens holder and is open near the first end of the lens holder, and an adhesive is injected into the at least one screw groove to keep the at least one optical element outside The annular surface and the inner annular surface of the lens mount are fixed to each other.

The following examples are only used to illustrate the possible implementation aspects of the present invention, but they are not intended to limit the scope of protection of the present invention, and are described first.

Please refer to FIG. 1 to FIG. 14. The present invention provides a lens module including a lens mount 10, 10 a, 10 b, at least one lens 20 and a pressure ring 30, 30 a.

The lens mounts 10, 10a, and 10b are cylindrical and have an inner ring surface that defines an accommodating space. The upper ends of the lens mounts 10, 10a, and 10b are respectively a first end 11 and a At the second end 12, the inner ring surface near the first end 11 includes sealing sections 13, 13a, 13b; the at least one lens 20 is disposed in the accommodating space, and the outer ring surface is connected to the lens mount 10, The inner ring surfaces of 10a, 10b are in contact; the pressing ring 30, 30a is arranged in the accommodating space and the outer ring faces the sealing section 13, 13a, 13b of the lens mount 10, 10a, 10b to prevent the at least one The lens 20 falls out from the first end 11 of the lens mount 10, 10a, 10b; wherein at least one of the sealing section 13a, 13b or the outer ring surface 31, 31a of the pressing ring 30, 30a is provided with at least one Screw grooves 131a, 131b, 32, 32a, the at least one screw groove 131a, 131b, 32, 32a extends around the axis of the lens mount 10, 10a, 10b and is close to the first end of the lens mount 10, 10a, 10b In an open shape, the at least one screw groove 131a, 131b, 32, 32a is filled with an adhesive 40, so that the outer ring surface 31, 31a of the pressing ring 30, 30a and the inner ring surface of the lens mount 10, 10a, 10b Fixed to each other.

The present invention also provides a lens holder 10a, 10b, which is cylindrical and has an inner ring surface, and the inner ring surface encloses an accommodating space for accommodating at least one optical element (such as a lens, a light shield or a pressure ring). The two ends of the lens mount 10a, 10b in the axial direction are respectively a first end and a second end. The inner ring surface near the first end includes sealing sections 13a, 13b, and the sealing sections 13a, 13b provide for the at least The outer ring surface of an optical element is positioned in contact with each other, the sealing sections 13a, 13b are provided with at least one screw groove 131a, 131b, the at least one screw groove 131a, 131b extends around the axis of the lens mount 10a, 10b and is close to the lens The first ends of the holders 10a, 10b are open, and an adhesive 40 is injected into the at least one screw groove 131a, 131b, so that the outer ring surface of the at least one optical element and the inner ring surface of the lens holder 10a, 10b Fixed to each other.

In particular, in the embodiments listed in the drawings of the present invention, the at least one screw groove 131a, 131b, 32, 32a is only formed in the sealing section 13a, 13b or the pressure ring 30, 30a However, in other possible embodiments, the screw groove may be formed in the sealing section and the pressing ring respectively.

In the main embodiment of the present invention, the distance of the at least one screw groove 32, 131a along the axis of the lens mount 10, 10a is smaller than the length of the outer ring surface 31 of the pressure ring 30 along the axis of the lens mount 10, 10a. That is, the at least one screw groove 32, 131a does not extend to the end of the pressing ring 30 closer to the second end 12, for example, it may have a plurality of shorter screw grooves, as shown in FIG. 8 or FIG. 10; In other possible embodiments of the present invention, as shown in FIG. 9 or FIG. 11, the distance between the at least one screw groove 32a, 131b along the axis of the lens mount 10b may be greater than or equal to the outer ring surface 31a of the pressure ring 30a along the lens The length in the axial direction of the seat allows the at least one screw groove 32a, 131b to communicate with the opposite sides of the pressure ring 30a. For example, there is only a single long screw groove. It should be noted that although the at least one screw groove is connected To the side of the pressure ring closer to the lens, however, due to the long extension of the screw groove, it is not easy to overflow to the lens immediately after the adhesive is injected. Therefore, it can not only ensure the wide distribution of the adhesive, but also reduce the contact of the adhesive Possibility of lenses.

In more detail, the radial cross section of the at least one screw groove 131a, 131b, 32, 32a is triangular and has a pointed bottom. Preferably, the diameter of the at least one screw groove 131a, 131b, 32, 32a The depth is between 2 microns and 300 microns.

In actual use, the adhesive 40 can be injected through the at least one screw groove 131a, 131b, 32, 32a near the opening of the first end 11, and then to the first end 11 along the at least one screw groove 131a, 131b, 32, 32a The two ends flow in 12 directions. During this process, the adhesive will gradually harden, which reduces the chance of the adhesive overflowing to the lens.

In summary, the lens module provided by the present invention uses the screw groove provided on the inner ring surface of the lens holder or the outer peripheral surface of the pressure ring to inject adhesive, so that the lens holder and the pressure ring are fixed to each other, and the screw groove is not extended. To the place close to the lens or although it extends to the place close to the lens but the length is very long, the injected adhesive will not overflow to the lens or is very difficult to overflow to the lens. Not only that, the pressure ring and the sealing section do not have screws. The groove part also extends like a thread, that is to say, the direct contact part of the pressure ring and the sealing section is similar to the ring shape, which has excellent friction and limiting effects, so that the pressure ring can better fit the lens mount. The mutual positioning further strengthens the fixing effect of the pressure ring.

10, 10a, 10b: lens mount

11: first end

12: second end

13, 13a, 13b: sealing section

131a, 131b: screw groove

20: lens

30, 30a: pressure ring

31, 31a: outer ring surface

32, 32a: screw groove

40: Adhesive

Figure 1 is a three-dimensional view of the lens mount and pressure ring of the present invention. Fig. 2 is a three-dimensional exploded view of the lens holder and pressure ring of the present invention. Figure 3 is a perspective view of the present invention. Figure 4 is a partial enlarged view of Figure 3. Figure 5 is a cross-sectional view of the present invention. Fig. 6 is a partial enlarged view of Fig. 5. Figure 7 is a schematic diagram of the glue filling of the present invention. Figure 8 is a perspective view of the pressure ring of the present invention. Fig. 9 is a perspective view of the pressure ring of the second embodiment of the present invention. Fig. 10 is a perspective view of the lens mount of the third embodiment of the present invention. Fig. 11 is a perspective view of the lens mount of the fourth embodiment of the present invention. Fig. 12 is a cross-sectional view of the third embodiment of the present invention. Figure 13 is a partial exploded view of Figure 12. Fig. 14 is a schematic diagram of filling glue in the third embodiment of the present invention.

10: lens mount

11: first end

12: second end

13: Blocking section

30: pressure ring

31: Outer ring surface

Claims (10)

A lens module includes: a lens holder, which is cylindrical and has an inner ring surface, the inner ring surface encloses an accommodating space, and the axial ends of the lens holder are respectively a first end and a second end , The inner ring surface includes a stop section near the first end; at least one lens, the at least one lens is arranged in the accommodating space and its outer ring surface is in contact with the inner ring surface of the lens holder; a pressure ring , The pressure ring is arranged in the accommodating space and its outer ring faces the sealing section of the lens holder; wherein at least one of the sealing section or the outer ring surface of the pressure ring is provided with at least one screw groove, The at least one screw groove extends around the axis of the lens holder and is open near the first end of the lens holder. An adhesive is injected into the at least one screw groove to make the outer ring surface of the pressure ring and the lens holder The inner ring surfaces are fixed to each other. The lens module according to claim 1, wherein the distance of the at least one screw groove along the axis of the lens mount is smaller than the length of the outer ring surface of the pressure ring along the axis of the lens mount. The lens module according to claim 1, wherein the distance of the at least one screw groove along the axis of the lens mount is greater than or equal to the length of the outer ring surface of the pressure ring along the axis of the lens mount, so that the at least one screw groove is connected On opposite sides of the pressure ring. The lens module according to any one of claims 1 to 3, wherein the radial cross section of the at least one screw groove is triangular and has a pointed bottom. The lens module according to any one of claims 1 to 3, wherein the radial depth of the at least one screw groove is between 2 μm and 300 μm. A lens holder is cylindrical and has an inner ring surface. The inner ring surface defines an accommodating space for accommodating at least one optical element. The two ends of the lens holder in the axial direction are respectively a first end and a second end, The inner ring surface includes a sealing section close to the first end, the sealing section is used for contact and positioning of the outer ring surface of the at least one optical element, and the sealing section is provided with at least one screw groove, the at least one screw groove The axial extension of the lens mount and The first end of the lens mount is open, and an adhesive is injected into the at least one screw groove to fix the outer ring surface of the at least one optical element and the inner ring surface of the lens mount to each other. The lens mount according to claim 6, wherein the distance of the at least one screw groove along the axis of the lens mount is smaller than the length of the outer ring surface of the at least one optical element along the axis of the lens mount. The lens holder according to claim 6, wherein the distance of the at least one screw groove along the axis of the lens holder is greater than or equal to the length of the outer ring surface of the at least one optical element along the axis of the lens holder, so that the at least one screw groove Connected to opposite sides of the at least one optical element. The lens holder according to any one of claims 6 to 8, wherein the radial cross section of the at least one screw groove is triangular and has a pointed bottom. The lens holder according to any one of claims 6 to 8, wherein the radial depth of the at least one screw groove is between 2 μm and 300 μm.

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