CN-121704026-B - Sensing limiting type light shielding cover device and light shielding method

CN121704026BCN 121704026 BCN121704026 BCN 121704026BCN-121704026-B

Abstract

The invention relates to the technical field of light shields in optical machines, in particular to a sensing limiting type light shield device and a light shielding method, wherein the sensing limiting type light shield device comprises a base, a detection assembly, a driving assembly, a light shield, a hollow pressure sensor and a lens cone assembly; the device comprises a base, a detection assembly, a lens barrel assembly, a hollow pressure sensor, a lens barrel assembly, a driving assembly, a lens hood, a driving end and a light shield, wherein the detection assembly and the lens barrel assembly are fixed on the base, the hollow pressure sensor is arranged on a supporting shell of the detection assembly, the lens barrel assembly and the hollow pressure sensor are arranged in a clearance mode so that a light beam passing through the lens barrel assembly is connected with a light path of the detection assembly, the driving end of the driving assembly is arranged on the inner wall of the supporting shell of the detection assembly, the driving end of the driving assembly is in transmission connection with the light shield sleeved on the outer wall of the lens barrel assembly, and the light shield is in threaded connection with the outer wall of the lens barrel assembly. The invention has the advantages that the structure is simple, and the accurate shielding of stray light is realized through the matching of the gear driving mechanism and the hollow pressure sensor.

Inventors

CHEN XILAI
HONG YONGFENG
GUO MINGHANG
DONG YUNCHONG
ZHOU CHEN
ZHANG QIANG
TIAN YE

Assignees

长春通视光电技术股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260224

Claims (3)

1. The sensing limiting type lens hood device is characterized by comprising a base (1), a detection assembly, a driving assembly, a lens hood (11), a hollow pressure sensor (8) and a lens barrel assembly; the detection assembly and the lens barrel assembly are both fixed on the base (1), and the hollow pressure sensor (8) is arranged on the support shell (3) of the detection assembly; the power end of the driving component is arranged on the inner wall of a supporting shell (3) of the detection component; The driving end of the driving assembly is in transmission connection with a light shield (11) sleeved on the outer wall of the lens barrel assembly, and the light shield (11) is in threaded connection with the outer wall of the lens barrel assembly, so that the light shield (11) axially moves to realize the clearance light shielding between the lens barrel assembly and the hollow pressure sensor (8) under the action of the driving assembly; the driving assembly comprises a motor (6), a driving gear (10), a coupler (9) and a motor support frame (5); The motor support frame (5) for fixing the motor (6) is arranged on the inner wall of the support shell (3); The output end of the motor (6) penetrates through the support shell (3) and is connected with the driving gear (10) through the coupler (9); the driving gear (10) is meshed with a driven gear arranged on the outer ring of the light shield (11); The detection assembly comprises a detector (4) and a support shell (3); a stepped through hole with the same level as the lens barrel assembly is formed in the support shell (3); in the cavity of the supporting shell (3), the detector (4) is fixed on the inner wall of the supporting shell (3) and covers the through hole; the stepped through hole is of a structure with large outside and small inside; One end of the hollow pressure sensor (8) is arranged in the outer through hole of the stepped through hole, and the sensing surface is close to the lens barrel assembly; the structural size of one end of the light shield (11) is matched with the size of the sensing surface of the hollow pressure sensor (8), so that a light shield structure is formed; and the height of one end of the light shield (11) is larger than the height of the meshing connection position of the driving gear (10) and the driven gear, so that a limiting structure is formed.
2. A sensing limiting mask arrangement according to claim 1, characterized in that the detection surface size of the detector (4) is larger than the inner through hole size of the stepped through hole.
3. A sensing limiting type shading method, which is characterized by being implemented by applying the sensing limiting type shading cover device as claimed in claim 2, and specifically comprising the following steps: s1, according to actual requirements, an applied main body device controller sends out an instruction to control a motor (6) to perform forward or reverse movement; s2, the main body device controller closes the motor (6) according to the received pressure signal of the hollow pressure sensor (8).

Description

Sensing limiting type light shielding cover device and light shielding method Technical Field The invention relates to the technical field of light shields in optical machines, in particular to a sensing limiting type light shield device and a light shielding method. Background The light shield used by the prior lens cone is generally divided into a fixed light shield and an adjustable light shield, wherein the light shield is difficult to adapt to diversified requirements based on the fixed light shield; The adjustable shade is more convenient to apply based on the advantage of being adjustable, for example, the most conventional shutter is designed in such a way that the shade device comprises a lamp tube, a rotatable shade covered on the periphery of the lamp tube, a rotary gear arranged on the shade, a driving gear and a motor, wherein the driving gear is linked with the rotary gear, and the driving gear is arranged on an output shaft of the motor. The motor drives the driving gear to rotate when working, the driving gear drives the rotating gear to rotate so as to enable the light shield to rotate to realize exposure operation, and because only one rotating gear drives the light shield to rotate, the light shield is unbalanced in stress, so that deflection occurs, the light shield cannot be accurately positioned, the exposure time and the energy cannot be controlled, the light shield is extremely easy to damage due to frequent rotation, for example, a Chinese patent with publication number of CN206411392U and named as a double-side driving light shield capable of being replaced quickly, a Chinese patent with publication number of CN216411834U and named as a novel light shield for multi-exposure shooting are proposed in the prior art, so that the existing common light shield structure is unbalanced in stress, inconvenient to maintain in later period and incapable of improving multi-exposure; But the above examples can only be adapted to the shutter structure of the camera, i.e. to the conventional exposure requirements and not to other application structures to adapt to the requirements of different optical parameters and environmental conditions. Based on this, a need exists for further improvements to existing shade devices to meet the above-mentioned needs. Disclosure of Invention Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, so as to provide a sensing limiting type light shielding device and a light shielding method. A sensing limiting type lens hood device comprises a base, a detection assembly, a driving assembly, a lens hood, a hollow pressure sensor and a lens barrel assembly; The lens cone assembly and the hollow pressure sensor are arranged in a gap way so that a light beam passing through the lens cone assembly is connected with a light path of the detection assembly; the power end of the driving assembly is arranged on the inner wall of the supporting shell of the detection assembly; The driving end of the driving assembly is in transmission connection with a light shield sleeved on the outer wall of the lens barrel assembly, and the light shield is in threaded connection with the outer wall of the lens barrel assembly, so that under the action of the driving assembly, the light shield axially moves to shield a gap between the lens barrel assembly and the hollow pressure sensor. Preferably, the driving assembly comprises a motor, a driving gear, a coupler and a motor support frame; the motor support frame for fixing the motor is arranged on the inner wall of the support shell; The output end of the motor penetrates through the supporting shell and is connected with the driving gear through the coupler; the driving gear is meshed with a driven gear arranged on the outer ring of the light shield. Preferably, the detection assembly comprises a detector and a support housing; The supporting shell is provided with a stepped through hole which has the same level with the lens barrel component; and in the cavity interior of the support housing, the detector is fixed to the inner wall of the support housing and covers the through hole. Preferably, the stepped through hole has a structure with large outside and small inside; one end of the hollow pressure sensor is arranged in the outer through hole of the stepped through hole, and the sensing surface is close to the lens barrel assembly. Preferably, the detection surface size of the detector is larger than the inner through hole size of the stepped through hole. Preferably, the structural size of one end of the light shield is matched with the size of the sensing surface of the hollow pressure sensor to form a light shield structure; and the height of one end of the light shield is larger than the height of the meshing connection position of the driving gear and the driven gear, so that a limiting structure is formed. The utility model provides a spacing shading method of sensing,