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CN-117292410-B - Focusing structure and focusing method

CN117292410BCN 117292410 BCN117292410 BCN 117292410BCN-117292410-B

Abstract

The application provides a focusing structure and a focusing method. The focusing structure comprises a focusing ring and a rubber block, and the rubber block is arranged at the bottom of the focusing ring. The rubber block is used for being in butt joint with a focal length adjusting ring of a lens of the optical fingerprint identification module, and at least one protruding part is formed to be clamped with the focal length adjusting ring. The rubber block is provided with a through hole, and the through hole is used for allowing light to pass through and enter the lens of the optical fingerprint identification module. The focusing method is a method for adjusting the focal length of the lens of the optical fingerprint identification module by using a focusing structure. The application can solve the problem that the time cost and the money cost of the production product are increased because the ring-shaped buckle corresponding to the customized design of the focus adjusting ring are required in the background technology.

Inventors

  • ZENG QIYUAN

Assignees

  • 业泓科技(成都)有限公司
  • 业泓科技股份有限公司

Dates

Publication Date
20260512
Application Date
20230920

Claims (8)

  1. 1. A focusing structure is characterized by comprising a focusing ring and a rubber block, wherein the rubber block is arranged at the bottom of the focusing ring and is used for butting with a focus adjusting ring of a lens of an optical fingerprint identification module and extruding towards the direction of the lens, the rubber block deforms in the process of extruding the lens to form at least one protruding part to be clamped with the focus adjusting ring, a through hole is formed in the rubber block and is used for allowing light to pass through and enter the lens of the optical fingerprint identification module, the focus adjusting ring comprises at least one groove, a part or the whole of each groove is located in the orthographic projection range of the rubber block, and the at least one protruding part is located in the at least one groove.
  2. 2. The focusing mechanism of claim 1, wherein the focus adjustment ring of the optical fingerprint recognition module includes at least one focus adjustment petal, the at least one groove being located between the at least one focus adjustment petal.
  3. 3. The focus mount of claim 1, wherein the focus mount comprises a first ring, a conical cover, and a second ring, the first ring is disposed at an edge of a bottom opening of the conical cover, the second ring is disposed at an edge of a top opening of the conical cover, an area of the top opening of the conical cover is larger than an area of the bottom opening, and the rubber block is disposed below the first ring.
  4. 4. The focusing structure of claim 3, wherein the first ring body comprises a first hollow region, the second ring body comprises a second hollow region, the first hollow region is disposed corresponding to the second hollow region, and the first hollow region and the second hollow region are both used for allowing the light to pass through and enter the lens.
  5. 5. A focusing method, comprising: step 1, providing a focusing structure according to claim 1; step 2, the focal length adjusting ring of the lens of the optical fingerprint identification module faces the rubber block of the focusing structure, the focal length adjusting ring comprises at least one groove, and a part or the whole of each groove is positioned in the orthographic projection range of the rubber block; step 3, extruding the focusing structure to the direction of the lens, and deforming the rubber block of the focusing structure in the process of extruding the lens to form at least one protruding part which is clamped with the focus adjusting ring and is positioned in the at least one groove; And 4, rotating the focusing ring of the focusing structure to enable the rubber block of the focusing structure to rotate, and driving the focus adjusting ring to rotate by the rubber block so as to adjust the focus of the lens of the optical fingerprint identification module.
  6. 6. The focusing method of claim 5, wherein the focus adjustment ring comprises at least one focus adjustment petal, the at least one groove being located between the at least one focus adjustment petal.
  7. 7. The focusing method according to claim 6, wherein the rubber block of the focusing structure in the step 3 is deformed during the pressing of the lens, and the at least one protrusion is formed in the at least one groove between the at least one focus adjustment petals, and the at least one protrusion is engaged with the at least one focus adjustment petals.
  8. 8. The focusing method according to claim 7, wherein when the rubber block is rotated in the step 4, the at least one protrusion of the rubber block drives the at least one focus adjustment petal to rotate, so that the focus adjustment ring is rotated to adjust the focus of the lens.

Description

Focusing structure and focusing method Technical Field The present application relates to the field of focal length adjustment, and in particular, to a device structure for adjusting a focal length of an optical fingerprint identification module and a focal length adjustment method. Background The existing method for adjusting the focal length of the lens of the optical fingerprint identification module generally utilizes industrial plastic polyether ether ketone (PEEK) to prepare and form a ring-shaped buckle, the shape of the ring-shaped buckle can be designed according to the shape of a focal length adjusting ring on the lens of the optical fingerprint identification module, for example, when four focal length adjusting petals are arranged on the focal length adjusting ring, four grooves are formed among the four focal length adjusting petals, the ring-shaped buckle comprises corresponding notches capable of accommodating all the focal length adjusting petals, and protruding blocks are respectively designed at all the grooves among the corresponding focal length adjusting petals, so that all the protruding blocks are inserted into the corresponding grooves. Therefore, after the annular buckle is arranged below the focusing ring, the focusing ring can be moved, so that the annular buckle below the focusing ring is clamped with the focus adjusting ring, and then when the focusing ring is rotated, the annular buckle drives the focus adjusting ring to rotate so as to adjust the focus of the lens of the optical fingerprint identification module. However, since the existing lens has numerous focal length adjusting ring shapes and the number of the included focal length adjusting petals is different, the ring-shaped buckle needs to be customized according to the focal length adjusting ring shapes of different lenses, so that the time cost and the money cost for designing and manufacturing the ring-shaped buckle are increased, and the time cost and the money cost of the final product are increased. Disclosure of Invention The application aims to solve the problem that in the background art, the corresponding annular buckle is required to be customized and designed according to the shape of the focal length adjusting ring, so that the time cost and the money cost of a product are increased. Based on the purpose of the application, the application provides a focusing structure which comprises a focusing ring and a rubber block, wherein the rubber block is arranged at the bottom of the focusing ring. The rubber block is used for being in butt joint with a focal length adjusting ring of a lens of the optical fingerprint identification module, and at least one protruding part is formed to be clamped with the focal length adjusting ring. The rubber block is provided with a through hole, and the through hole is used for allowing light to pass through and enter the lens of the optical fingerprint identification module. In one embodiment of the application, the focus adjustment ring comprises at least one groove, a part or the whole of each groove is positioned in the orthographic projection range of the rubber block, and the at least one protruding part is positioned in the at least one groove. In an embodiment of the application, the focus adjustment ring of the optical fingerprint recognition module comprises at least one focus adjustment petal, and the at least one groove is located between the at least one focus adjustment petal. In an embodiment of the application, the focusing ring includes a first ring body, a conical cover and a second ring body, wherein the first ring body is disposed at an edge of a bottom opening of the conical cover, and the second ring body is disposed at an edge of a top opening of the conical cover. The area of the top opening of the cone-shaped cover is larger than the area of the bottom opening. The rubber block is arranged below the first ring body. In an embodiment of the application, the first ring body includes a first hollow area, the second ring body includes a second hollow area, the first hollow area is disposed corresponding to the second hollow area, and the first hollow area and the second hollow area are both used for allowing light to pass through and enter the lens. In an embodiment of the application, the through hole of the rubber block is disposed corresponding to the first hollow area and the second hollow area. Based on an object of the present application, the present application provides a focusing method, which includes steps 1, 2, 3 and 4. Step 1 is to provide a focusing structure as described above. And 2, enabling a focal length adjusting ring of a lens of the optical fingerprint identification module to face a rubber block of a focusing structure. And 3, extruding the focusing structure to the direction of the lens, and deforming the rubber block of the focusing structure in the process of extruding the lens to form at least one protruding part to be clamped wi