Manual focusing mechanism

Abstract

The utility model discloses a manual focusing mechanism, which comprises a bottom plate and an imaging plate, the imaging plate is arranged on the bottom plate, the manual focusing mechanism also comprises a focusing base, a mounting seat, a light source, an optical lens and a bulb plug column, the focusing base is arranged on the bottom plate, the focusing base is provided with a mounting through hole, and the mounting seat is arranged on the mounting through hole. The focusing base is provided with a mounting through hole, the mounting base is in sliding fit with the mounting through hole, the optical lens is arranged on the focusing base, the light source is arranged on the mounting base, the optical lens is located between the light source and the imaging plate, and the ball plug column is arranged on the mounting base and abuts against the mounting base. The manual focusing mechanism has the following beneficial effects that the distance between the slit and the optical lens is adjusted to complete focal length adjustment through the guidance formed by the ball plug column and the semi-arc-shaped grooves in the two sides of the mounting seat, and the direction of the slit can be kept unchanged in the adjustment process; and the position of the focused mounting seat can be kept unchanged by using the pressing force of the ball head of the ball head plug column.

Description

Technical Field

[0001] The utility model relates to the field of optical focusing, in particular to a manual focusing mechanism. Background Art

[0002] The existing focusing mechanism usually adjusts the distance between the object and the lens by rotating the lens' own thread or cooperating with linear guides and double-track cylinders (essentially a lead screw mechanism). The method of focusing using the lens' own thread will cause the lens to shake and the center to shift during the adjustment process due to the influence of thread gap and gravity, and requires additional fastening measures. The linear guides and double-track cylinders are large in size, have many combined parts, are prone to jamming during use, and are prone to cumulative errors and are not easy to install. Utility Model Content

[0003] In view of the above problems, the utility model proposes a manual focusing mechanism. In the focusing mechanism, a mounting seat is slidably mounted in a sliding through hole of a focusing base. Focusing can be achieved by moving the mounting seat. During the focusing process, the mounting seat will not deviate or get stuck, and the use is convenient.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A manual focusing mechanism comprises a base plate and an imaging plate, wherein the imaging plate is arranged on the base plate, and further comprises a focusing base, a mounting seat, a light source, an optical lens and a ball plug, wherein the focusing base is arranged on the base plate, the focusing base is provided with a mounting through hole, the mounting seat and the mounting through hole are slidably matched together, the optical lens is arranged on the focusing base, the light source is arranged on the mounting seat, the optical lens is located between the light source and the imaging plate, the ball plug is arranged on the mounting seat, and the ball plug is against the mounting seat.

[0006] In this manual focusing mechanism, the light source is mounted on the mounting seat, the mounting seat is slidably mounted in the mounting through hole, the ball head plug is against the mounting seat, and the ball head plug plays an elastic clamping role on the mounting seat. When no external force is applied, the mounting seat will not move in the mounting seat. When the mounting seat does not move, the position of the light source relative to the optical lens and the imaging plate will not change, so stable imaging can be maintained. When the mounting seat moves in the mounting through hole, the relative position of the light source relative to the optical lens and the imaging plate changes. This process is the focusing process, and the movement of the mounting seat in the mounting through hole is the focusing process, so no cumulative error will be generated during focusing. And the focusing process only requires moving the mounting seat, so it is not easy to get stuck during the focusing process like the lead screw mechanism.

[0007] Therefore, in this focusing mechanism, the light source is installed on the mounting base, and the mounting base is slidably installed in the sliding through hole of the focusing base. Moving the mounting base can achieve focusing, and during the focusing process, the mounting base will not shift or get stuck, which is convenient to use.

[0008] Specifically, in this focusing mechanism, the optical lens, the light source, and the slit at the end of the mounting base are in a coaxial state.

[0009] Optionally, it further includes an adjusting bolt cooperating with the mounting base, and the adjusting bolt abuts against the focusing base, and the adjusting bolt is located outside the mounting through hole.

[0010] Since the adjusting bolt and the mounting base are cooperated together by a threaded fit and the adjusting bolt is located outside the mounting through hole, when focusing is required, only by turning the adjusting bolt can focusing be achieved.

[0011] Optionally, there are two ball head plug columns, and the two ball head plug columns are respectively located on both sides of the mounting base and are on a straight line.

[0012] The ball head plug columns located on both sides of the mounting base play a clamping role on the mounting base, ensuring that the mounting base can be stably clamped in the mounting base under the action of the two ball head plug columns without external force.

[0013] Optionally, the light source is located in the mounting through hole.

[0014] Optionally, the focusing base and the bottom plate are cooperated together by fastening screws.

[0015] Optionally, both the imaging plate and the focusing base are perpendicular to the bottom plate, and the imaging plate and the focusing base are in a parallel and non-contact state.

[0016] Optionally, the mounting base is provided with a semi-circular arc-shaped groove, and the spherical head of the ball head plug column abuts against the semi-circular arc-shaped groove.

[0017] Specifically, the semi-circular arc-shaped groove is linear, and there are two semi-circular arc-shaped grooves, and the two semi-circular arc-shaped grooves are in a parallel state. The spherical heads on the ball head plug columns located on both sides of the mounting base respectively abut against the two semi-circular arc-shaped grooves under the action of the spring. The semi-circular arc-shaped groove and the spherical head jointly play a guiding role, which can improve the stability of the mounting base sliding in the mounting through hole, ensure that the mounting slides along a straight line in the mounting through hole, and the mounting base will not shake when sliding in the mounting through hole, ensuring that the direction of the slit remains unchanged during the adjustment process.

[0018] Specifically, in this focusing mechanism, different light beams can be obtained by customizing slits with different shapes.

[0019] Optionally, the ball head plug column is perpendicular to the mounting base.

[0020] The ball head plug is perpendicular to the mounting seat, which can ensure the cooperation stability between the mounting seat and the ball head plug.

[0021] The beneficial effects of the utility model are as follows: 1. The mounting seat is slidably mounted in the sliding through hole of the focusing base. By moving the mounting seat, focusing can be achieved, and the mounting seat will not shift or get stuck during the focusing process, which is convenient to use; 2. Through the guidance formed by the ball head plug and the semi-circular grooves on both sides of the mounting seat, the distance between the adjustment slit and the optical lens is adjusted to complete the focal length adjustment. During the adjustment process, the direction of the slit can be kept unchanged, and the pressing force of the spherical head of the ball head plug can be used to keep the position of the mounting seat unchanged after focusing. In addition, by customizing slits with different shapes, different light beams can be obtained. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of the manual focusing mechanism;

[0024] Figure 2 is a top view of the manual focusing mechanism;

[0025] Figure 3 is Figure 2 a schematic cross-sectional diagram taken along the A-A direction in

[0026] Figure 4 is Figure 2 a schematic cross-sectional diagram taken along the C-C direction in

[0027] Figure 5 is a schematic diagram of the working principle of the manual focusing mechanism.

[0028] The reference numerals in the drawings are as follows: 1. Base; 201. Focusing base; 2011. Mounting through hole; 202. Ball head plug; 2021. Spring; 2022. Spherical head; 203. Adjusting bolt; 204. Light source; 205. Mounting seat; 2051. Semi-circular groove; 206. Optical lens; 3. Imaging plate; 4. Fastening screw. Detailed Embodiments

[0029] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following will give a detailed description of the specific embodiments of the present utility model with reference to the drawings.

[0030] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art may make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and

[0033] a manual focusing mechanism includes a bottom plate and an imaging plate 3. The imaging plate 3 is disposed on the bottom plate, and further includes a focusing base 201, a mounting seat 205, a light source 204, an optical lens 206, and a ball head plug 202. The focusing base 201 is disposed on the bottom plate. The focusing base 201 is provided with a mounting through hole 2011. The mounting seat 205 is slidably engaged with the mounting through hole 2011. The optical lens 206 is disposed on the focusing base 201. The light source 204 is disposed on the mounting seat 205. The optical lens 206 is located between the light source 204 and the imaging plate 3. The ball head plug 202 is disposed on the mounting seat 205, and the ball head plug 202 abuts against the mounting seat 205.In this manual focusing mechanism, the light source 204 is installed on the mounting base 205. The mounting base 205 is slidably installed in the mounting through hole 2011. The ball head plug 202 abuts against the mounting base 205, and the ball head plug 202 elastically clamps the mounting base 205. When no external force is applied, the mounting base 205 will not move within the mounting base 205. When the mounting base 205 does not move, the position of the light source 204 relative to the optical lens 206 and the imaging plate 3 will not change either. Therefore, stable imaging can be maintained. When the mounting base 205 moves within the mounting through hole 2011, the relative position of the light source 204 relative to the optical lens 206 and the imaging plate 3 changes. This process is the focusing process, and the movement of the mounting base 205 within the mounting through hole 2011 is the focusing process. Therefore, no cumulative error will be generated during focusing. Moreover, only the mounting base 205 needs to be moved during the focusing process. Therefore, the focusing process is not prone to jamming like a lead screw mechanism.

[0034] Therefore, in this focusing mechanism, the light source 204 is installed on the mounting base 205. The mounting base 205 is slidably installed in the sliding through hole of the focusing base 201. Moving the mounting base 205 can achieve focusing, and the mounting base 205 will not shift or jam during the focusing process, which is convenient to use.

[0035] Specifically, in this focusing mechanism, the optical lens 206, the light source 204, and the slit at the end of the mounting base 205 are coaxial.

[0036] As shown in Figure 1 Figure Figure 2 Figure Figure 3 Figure Figure 4 Figure Figure 5 and Figure

[0037] Since the adjusting bolt 203 and the mounting base 205 are engaged with each other by means of thread fitting, and the adjusting bolt 203 is located outside the mounting through hole 2011, when focusing is required, only the adjusting bolt 203 needs to be turned to achieve focusing.

[0038] As shown in Figure 1 Figure Figure 2 Figure Figure 3 Figure Figure 4 Figure Figure 5 and Figure

[0039] The ball head plug columns 202 located on both sides of the mounting seat 205 clamp the mounting seat 205, ensuring that the mounting seat 205 can be stably clamped within the two ball head plug columns 202 without external force.

[0040] As shown in the attached Figure 1 attachment Figure 2 attachment Figure 3 attachment Figure 4 and the attached Figure 5 As shown, the light source 204 is located within the mounting through hole 2011.

[0041] As shown in the attached Figure 1 attachment Figure 2 attachment Figure 3 attachment Figure 4 and the attached Figure 5 As shown, the focusing base 201 and the bottom plate are fitted together by fastening screws 4.

[0042] As shown in the attached Figure 1 attachment Figure 2 attachment Figure 3 attachment Figure 4 and the attached Figure 5 As shown, the imaging plate 3 and the focusing base 201 are both perpendicular to the bottom plate, and the imaging plate 3 and the focusing base 201 are in a parallel and non-contact state.

[0043] As shown in the attached Figure 1 attachment Figure 2 attachment Figure 3 attachment Figure 4 and the attached Figure 5 As shown, the mounting seat 205 is provided with a semi-circular arc-shaped groove 2051, and the spherical head 2022 of the ball head plug column 202 abuts against the semi-circular arc-shaped groove 2051.

[0044] Specifically, the semi-circular arc-shaped groove 2051 is linear, and there are two semi-circular arc-shaped grooves 2051. The two semi-circular arc-shaped grooves 2051 are in a parallel state. The spherical heads 2022 on the ball head plug columns 202 located on both sides of the mounting seat 205 respectively abut against the two semi-circular arc-shaped grooves 2051 under the action of the spring 2021. The semi-circular arc-shaped groove 2051 and the spherical head 2022 together play a guiding role, which can improve the stability of the mounting seat 205 when sliding within the mounting through hole 2011, ensure that it slides along a straight line within the mounting through hole 2011, and the mounting seat 205 does not shake when sliding within the mounting through hole 2011, ensuring that the slit direction remains unchanged during the adjustment process.

[0045] Specifically, in this focusing mechanism, different light beams can be obtained by customizing slits of different shapes.

[0046] As shown in the attached Figure 1 attachment Figure 2 attachmentFigure 3 , attached Figure 4 and attached Figure 5 As shown, the ball head plug column 202 is perpendicular to the mounting seat 205.

[0047] The perpendicularity of the ball head plug column 202 to the mounting seat 205 can ensure the cooperation stability between the mounting seat 205 and the ball head plug column 202.

[0048] It is necessary to explain the attached Figure 5 It should be noted that Figure 5 in the attached, the half-arrow is a schematic diagram of the moving direction of the mounting seat, while the full arrow is a schematic diagram of the bouncing direction of the spherical ball head 2022, and in the attached Figure 5 the broken line is a schematic diagram of light imaging.

[0049] The above-described embodiments only represent some embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A manual focusing mechanism, comprising a base plate and an imaging plate, wherein the imaging plate is arranged on the base plate, characterized in that: It also includes a focusing base, a mounting seat, a light source, an optical lens and a ball head plug, wherein the focusing base is arranged on the bottom plate, the focusing base is provided with a mounting through hole, the mounting seat is slidably matched with the mounting through hole, the optical lens is arranged on the focusing base, the light source is arranged on the mounting seat, the optical lens is located between the light source and the imaging plate, the ball head plug is arranged on the mounting seat, and the ball head plug is against the mounting seat.

2. A manual focusing mechanism according to claim 1, characterized in that: It also includes an adjusting bolt that cooperates with a mounting seat, and the adjusting bolt abuts against the focusing base, and the adjusting bolt is located outside the mounting through hole.

3. A manual focusing mechanism according to claim 1, characterized in that: There are two ball head plugs, which are respectively located on two sides of the mounting seat and are located in a straight line.

4. A manual focusing mechanism according to claim 1, characterized in that: The light source is located in the mounting through hole.

5. The manual focusing mechanism according to claim 1, characterized in that: The focusing base and the bottom plate are matched together by fastening screws.

6. The manual focusing mechanism according to claim 1, characterized in that: The imaging plate and the focusing base are both perpendicular to the bottom plate, and the imaging plate and the focusing base are in a parallel and non-contact state.

7. The manual focusing mechanism according to claim 1, characterized in that: The mounting seat is provided with a semicircular groove, and the spherical head of the ball plug is against the semicircular groove.

8. The manual focusing mechanism according to claim 1, characterized in that: The ball plug is perpendicular to the mounting seat.

Images