Multi-specification optical pinhole device

Abstract

The utility model discloses a multi-specification optical pinhole device, which relates to the field of optical pinholes and comprises a cover cylinder, an annular shell is rotatably mounted at one end of the cover cylinder, a plurality of pinhole pieces of different specifications are annularly distributed on the inner side of the annular shell, and the pinhole pieces are elastically and rotatably connected with the annular shell through torsion springs. The needle hole pieces elastically rotate on the side edge of the cover cylinder and are parallel to the axial direction of the cover cylinder, an extrusion assembly is arranged on the surface of the cover cylinder, the needle hole pieces can alternately align to the extrusion assembly along with rotation of the annular shell, and the extrusion assembly extrudes the aligned needle hole pieces to rotate to the end face parallel to the annular shell. The pinhole pieces of various specifications can be aligned to the extrusion assembly by rotating the ring shell, the extrusion assembly selects one to extrude the pinhole piece to be perpendicular to the light, and the pinhole pieces of various specifications can be conveniently and rapidly switched.

Description

Technical Field

[0001] The utility model relates to the field of optical pinholes, in particular to a multi-specification optical pinhole device. Background Art

[0002] As an important optical element, the optical pinhole plays an important role in imaging, light path control and parameter adjustment. The optical pinhole is formed by puncturing the surface of the metal sheet. The optical pinhole on the surface of each metal sheet has a single specification. In the specific application process, the specifications of the pinhole are adjusted by replacing an independent pinhole sheet. The entire disassembly and assembly process is rather cumbersome. Utility Model Content

[0003] The utility model aims to provide a multi-specification optical pinhole device, which is used to solve the problem of complicated replacement of optical pinhole sheets of different specifications.

[0004] In order to solve the problems existing in the prior art, the technical solution of the utility model is as follows:

[0005] A multi-specification optical pinhole device comprises a cover tube, one end of which is rotatably mounted with an annular shell, a plurality of pinhole sheets of different specifications are annularly distributed on the inner side of the annular shell, the pinhole sheets are elastically rotatably connected to the annular shell via a torsion spring, the pinhole sheets elastically rotate on the side of the cover tube parallel to the axial direction of the cover tube, an extrusion assembly is arranged on the surface of the cover tube, the pinhole sheets can rotate with the annular shell and alternately align with the extrusion assembly, and the pinhole sheets aligned with the extrusion assembly are rotated to be parallel to the end face of the annular shell.

[0006] Preferably, the pinhole sheet extruded by the extrusion assembly is concentrically aligned with the annular shell.

[0007] Preferably, a stopper is provided on the inner side of the annular shell, and the stopper is used to block and limit the maximum rotation angle of the pinhole plate to be parallel to the end face of the annular shell.

[0008] Preferably, the extrusion assembly includes a pressing block, which is elastically rotatably connected to the cover cylinder through a torsion spring, and a screw is threaded through the surface of the cover cylinder. The end of the screw radially pushes the pressing block to rotate, so that the pressing block pushes the pinhole sheet to rotate.

[0009] Preferably, a rubber block is provided at the position where the pressing block contacts the pinhole sheet.

[0010] Preferably, the surface of the pressing block has an inclined portion, and the screw presses the inclined portion of the pressing block.

[0011] Preferably, a slot is provided on the surface of the annular shell to align with the position of each pinhole plate, a card plate is radially elastically slidably arranged on the surface of the cover tube, a screw passes through the card plate, a pressing piece is provided at the end of the screw to squeeze the card plate, and the card plate is squeezed into the slot by the pressing piece.

[0012] Compared with the related art, the utility model has the following beneficial effects:

[0013] The utility model arranges pinhole sheets of various specifications in an annular distribution inside a ring shell, and the pinhole sheets of various specifications can be aligned with the extrusion assembly by rotating the ring shell. The extrusion assembly selects one pinhole sheet to be extruded perpendicularly to the front of the light, so that the pinhole sheets of various specifications can be quickly switched. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is one of the overall structural schematic diagrams of the utility model.

[0015] Figure 2 This is the second schematic diagram of the overall structure of the utility model.

[0016] Figure 3 It is a cross-sectional structural schematic diagram of the utility model.

[0017] Figure 4 for Figure 3 A magnified schematic diagram of point A;

[0018] Figure 5 The utility model is a schematic diagram of the card board card connection card slot structure.

[0019] Figure numerals: 1, ring shell; 2, cover tube; 3, pinhole plate; 4, stopper; 5, pressure block; 51, inclined portion; 52, rubber block; 6, screw; 61, pressure plate; 7, clamping plate; 71, clamping groove. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the multi-specification optical pinhole device, the outer body is composed of an annular shell 1 and a cover tube 2, the annular shell 1 is embedded and rotatably installed at the end of the cover tube 2, and a plurality of pinhole sheets 3 of different specifications are distributed in an annular manner in the annular shell 1, and the pinhole sheets 3 are elastically rotatably connected to the annular shell 1 through a torsion spring. Under the action of the elastic force, the pinhole sheets 3 rotate to the inner edge of the annular shell 1 and are parallel to the axial direction of the cover tube 2;

[0022] The pinhole sheet 3 has a metal sheet body, an optical pinhole of corresponding specifications is arranged on the surface of the metal sheet body, a skeleton for maintaining its shape is arranged outside the metal sheet body, and the skeleton of the pinhole sheet 3 is connected to the ring shell 1;

[0023] like Figure 3 , Figure 4As shown, an extrusion assembly is arranged at a position on the surface of the cover tube 2, and the extrusion assembly includes a pressing block 5, and the pressing block 5 is elastically rotated and connected to the inner edge of the cover tube 2 through a torsion spring, and a screw 6 is penetrated from the outer radial thread of the cover tube 2 to the inside, so that the inner end of the screw 6 contacts the pressing block 5;

[0024] The outer surface of the ring shell 1 is provided with rough textures. The ring shell 1 is rotated to move the pinhole sheet 3 of corresponding specifications to the position of the pressing block 5. The screw 6 is rotated to squeeze the pressing block 5, so that the pressing block 5 overcomes the elastic force and rotates. The end of the pressing block 5 squeezes the pinhole sheet 3 to rotate. The stopper 4 is fixed on the inner side of the ring shell 1. The stopper 4 blocks and limits the rotation of the pinhole sheet 3 to be parallel to the end face of the ring shell 1. At this time, the pinhole sheet 3 is concentrically aligned with the ring shell 1, and the light is irradiated on the surface of the pinhole sheet 3 from the axial direction of the cover tube 2;

[0025] To replace pinhole sheets 3 of different sizes, you need to loosen the screw 6 first to reset the pressing block 5, and the pinhole sheet 3 at the corresponding position will also reset elastically. Then rotate the ring shell 1 to adjust the pinhole sheet 3 of the required specifications to align with the pressing block 5, and then rotate the screw 6 to push.

[0026] like Figure 4 As shown, a rubber block 52 is arranged at the position where the pressing block 5 contacts the pinhole sheet 3, so that the pressing block 5 and the pinhole sheet 3 are flexibly squeezed and contacted, and the pinhole sheet 3 is pressurized and protected. The surface of the pressing block 5 has an inclined portion 51, and the screw 6 squeezes the inclined portion 51 of the pressing block 5. By controlling the screwing depth of the screw 6, the screw 6 contacts different positions of the inclined portion 51, and the pressing state of the pressing block 5 on the pinhole sheet 3 is changed.

[0027] like Figure 4 , Figure 5 As shown, a card slot 71 is provided on the surface of the ring shell 1 at the position where each pinhole sheet 3 is positioned, a card plate 7 is radially elastically slidably provided on the surface of the cover tube 2, a screw 6 passes through the card plate 7, and a pressing piece 61 is provided at the end of the screw 6 for squeezing the card plate 7. The card plate 7 is squeezed by the pressing piece 61 and is inserted into the card slot 71, so that the pinhole sheet 3 and the pressing block 5 are kept aligned, and the angle of the pinhole sheet 3 is also locked to avoid the pinhole sheet 3 from shifting during use. In addition, when replacing the pinhole sheet 3, it is necessary to loosen the screw 6 to withdraw the card plate 7 from the card slot 71 before the ring shell 1 can be rotated to avoid misoperation.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-specification optical pinhole device, characterized in that: include: A cover tube (2) is provided, wherein an annular shell (1) is rotatably mounted on one end of the cover tube (2), a plurality of pinhole sheets (3) of different specifications are distributed in an annular manner on the inner side of the annular shell (1), the pinhole sheets (3) are elastically rotatably connected to the annular shell (1) via a torsion spring, the pinhole sheets (3) elastically rotate on the side of the cover tube (2) parallel to the axial direction of the cover tube (2), an extrusion assembly is provided on the surface of the cover tube (2), the pinhole sheets (3) can rotate with the annular shell (1) to alternately align with the extrusion assembly, and the extrusion assembly aligns the pinhole sheets (3) and rotates them to be parallel to the end face of the annular shell (1).

2. The multi-format optical pinhole device according to claim 1, characterized in that: The pinhole sheet (3) squeezed by the squeezing assembly is concentrically aligned with the annular shell (1).

3. The multi-format optical pinhole device according to claim 1, characterized in that: The inner side of the annular shell (1) is provided with a stopper (4), which is used to block and limit the maximum rotation angle of the pinhole plate (3) to be parallel to the end face of the annular shell (1).

4. The multi-format optical pinhole device according to claim 1, characterized in that: The extrusion assembly comprises a pressing block (5), the pressing block (5) being elastically rotatably connected to the cover tube (2) via a torsion spring, a screw (6) being threadedly passed through the surface of the cover tube (2), and the end of the screw (6) radially pushing the pressing block (5) to rotate, so that the pressing block (5) pushes the pinhole sheet (3) to rotate.

5. The multi-format optical pinhole device according to claim 4, characterized in that: A rubber block (52) is provided at the location where the pressing block (5) contacts the pinhole sheet (3).

6. The multi-format optical pinhole device according to claim 5, characterized in that: The surface of the pressing block (5) has an inclined portion (51), and the screw (6) presses the inclined portion (51) of the pressing block (5).

7. The multi-format optical pinhole device according to claim 4, characterized in that: The surface of the annular shell (1) is provided with a clamping groove (71) corresponding to the position of each pinhole sheet (3); the surface of the cover tube (2) is provided with a clamping plate (7) for radial elastic sliding; the screw (6) passes through the clamping plate (7); the end of the screw (6) is provided with a pressing piece (61) for pressing the clamping plate (7); the clamping plate (7) is pressed by the pressing piece (61) and clamped into the clamping groove (71).

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