Industrial camera focus adjustment structure

Abstract

The utility model discloses an industrial camera focus adjustment structure relates to camera position control field. The structure includes: lens fixed cylinder seat, lens support spare is used for supporting the industrial camera with optical axis, the lens support spare is connected to the lens fixed cylinder seat through the guide unit, and the guide unit is used for guiding the lens support spare moves along the optical axis relative to the lens fixed cylinder seat, the adjusting ring is covered between the lens fixed cylinder seat with the adjusting ring and is connected with the lens fixed cylinder seat screw thread, is used for making it rotate around the optical axis and moves along the optical axis relative to the lens fixed cylinder seat, and elastic element is arranged between the lens support spare with the lens fixed cylinder seat, the lens support spare is always along the optical axis and is pressed in the adjusting ring under the action of the elastic element. When the adjusting ring is screwed, the industrial camera moves along the optical axis relative to the lens fixed cylinder seat with the lens support spare and carries out focusing.

Description

Technical Field

[0001] This utility model relates to the field of camera position control, specifically to a focus adjustment structure for an industrial camera. Background Technology

[0002] Existing industrial cameras are mainly divided into two types: autofocus and fixed focus.

[0003] When an autofocus industrial camera is built into the equipment, it uses software to analyze information such as the contrast of image pixels in real time to determine whether the focus is accurate and control the camera lens to focus. This is slow and prone to inaccurate focusing in complex backgrounds and poor lighting conditions.

[0004] The focal plane of a fixed-focus industrial camera is fixed, and precise manual adjustment of the focal plane is required when the camera is installed inside the equipment. Existing manual adjustment mechanisms mainly use axial sliding and side screw fixing, which have poor adjustment accuracy. Side fixing can easily cause slight displacement of the camera, resulting in changes in the focal plane.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] Purpose of the utility model: The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing an industrial camera focusing adjustment structure that enables the industrial camera to move along its optical axis for focusing, and avoids changes in the position of the focal plane of the industrial camera after adjustment.

[0007] To solve the above-mentioned technical problems, this utility model discloses an industrial camera focus adjustment structure, which includes:

[0008] Lens mounting base;

[0009] A lens support for supporting an industrial camera with an optical axis; the lens support is connected to the lens mounting base via a guide unit, the guide unit being used to guide the lens support to move relative to the lens mounting base along the optical axis.

[0010] An adjusting ring is fitted between the lens mounting base and the adjusting ring and is threadedly connected to the lens mounting base, for rotating and moving relative to the lens mounting base about the optical axis and along the optical axis.

[0011] An elastic element is disposed between the lens support and the lens fixing cylinder; the lens support is always pressed against the adjusting ring along the optical axis under the action of the elastic element.

[0012] When the adjusting ring is turned, the adjusting ring rotates around the optical axis and moves along the optical axis relative to the lens mounting base. The lens support moves along the optical axis relative to the lens mounting base under the drive of the adjusting ring and the guidance of the guide unit, thereby enabling the industrial camera to move along the optical axis for focusing.

[0013] This invention replaces the existing manual adjustment method of axial sliding and side screw fixing with a threaded rotation lifting mechanism. Furthermore, by using a fine-pitch thread, the industrial camera rises or falls by one thread pitch for every one revolution of the thread, allowing for high-precision adjustment of the camera's focal plane position. Moreover, after adjustment, the focal plane position remains unchanged due to the self-locking effect of the thread.

[0014] In some embodiments, the outer end of the adjusting ring is connected to a screwing part.

[0015] More specifically, the outer side of the screw-in part is provided with knurling.

[0016] In some embodiments, the guide unit includes a guide pin and a slide groove. The slide groove is formed in the side wall of the lens mounting base. One end of the guide pin is slidably installed in the slide groove, and the other end is fixedly connected to the lens support.

[0017] In some embodiments, the lens support is pressed against the adjustment ring by the guide pin.

[0018] In some embodiments of the elastic element, the elastic element is a compression spring, disposed along the optical axis on the side of the guide pin away from the adjusting ring.

[0019] More specifically, the lower part of the lens support is fitted inside the compression spring.

[0020] In some other embodiments of the elastic element, the elastic element is a tension spring, which can be disposed on the outside of the lens mounting base, with one end fixedly connected to the top of the lens mounting base and the other end fixedly connected to the outer end of the guide pin extending from the slide groove.

[0021] In some embodiments, the guide unit is provided in multiple ways, and the multiple guide units are arranged around the optical axis.

[0022] Beneficial effects:

[0023] 1. The industrial camera focusing adjustment structure provided by this utility model allows the industrial camera, mounted on the lens support, to move along its optical axis for focusing by manually turning the adjusting ring. This utility model uses threaded rotation and lifting to replace the existing manual adjustment method of axial sliding and side screw fixing. Furthermore, by using a fine-pitch thread, the industrial camera moves up or down by one thread pitch for every one rotation of the thread, allowing for high-precision adjustment of the camera's focal plane position.

[0024] 2. After focusing, due to the action of the compression spring, the pin on the lens support is always in the position of pressing against the adjustment ring. Moreover, the adjustment ring uses a fine thread, and the self-locking phenomenon of the small pitch thread ensures that the thread will not loosen under the action of the compression spring, thereby ensuring that the position of the industrial camera remains unchanged and solving the problem of focal plane offset in the existing technology.

[0025] 3. This utility model guides the lens support to move along the optical axis relative to the lens fixing cylinder through the guide unit, thereby limiting the rotation and shaking of the industrial camera, thus causing image twisting or shifting. Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0027] Figure 1 A three-dimensional structural schematic diagram of a focus adjustment structure for an industrial camera provided as an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 An exploded view of the focus adjustment structure of an industrial camera shown.

[0029] Figure 3 for Figure 1 The first main sectional view of the focus adjustment structure of the industrial camera shown;

[0030] Figure 4 for Figure 1 The second main sectional view of the focus adjustment structure of the industrial camera shown.

[0031] The reference numerals in the attached drawings are as follows: 1. Lens mounting base; 2. Lens support; 21. Stop; 3. Industrial camera; 31. Optical axis; 4. Adjustment ring; 41. Tightening part; 42. Knurled pattern; 5. Elastic element; 6. Guide pin; 7. Slide groove. Detailed Implementation

[0032] Example 1

[0033] Please see Figures 1 to 4The industrial camera focusing adjustment structure provided in this embodiment includes: a lens mounting base 1, one end of which can be connected to the internal base of the equipment; a lens support 2 for supporting the industrial camera 3 with an optical axis 31; the lens support 2 is connected to the lens mounting base 1 through a guide unit, which guides the lens support 2 to move relative to the lens mounting base 1 along the optical axis 31; an adjusting ring 4, which is sleeved between the lens mounting base 1 and the adjusting ring 4 and threadedly connected to the lens mounting base 1, for rotating and moving relative to the lens mounting base 1 around the optical axis 31 and along the optical axis 31; and an elastic element 5, which is disposed between the lens support 2 and the lens mounting base 1; the lens support 2 is always pressed against the adjusting ring 4 along the optical axis 31 under the action of the elastic element 5.

[0034] In use, the adjusting ring 4 is turned so that it rotates around the optical axis 31 and moves along the optical axis 31 relative to the lens mounting base 1; the lens support 2 moves along the optical axis 31 relative to the lens mounting base 1 under the drive of the adjusting ring 4 and the guidance of the guide unit, thereby enabling the industrial camera 3 to move along the optical axis 31 for manual focusing.

[0035] When the adjusting ring 4 rotates one full turn, the industrial camera 3 moves along the optical axis by a distance equal to one thread pitch. A smaller thread pitch results in higher adjustment precision, enabling high-precision focusing. In this embodiment, the thread pitch is 1.5 mm.

[0036] In one embodiment, combined with Figure 1 As shown, the outer end of the adjusting ring 4 is connected to a screwing part 41 for easy screwing operation.

[0037] More specifically, in combination Figure 1 As shown, the outer side of the screwing part 41 is provided with knurling 42 to increase friction and make it easier for the user to operate.

[0038] In one embodiment, combined with Figure 3 As shown, the guide unit includes a guide pin 6 and a slide groove 7. The slide groove 7 is formed in the side wall of the lens mounting base 1. One end of the guide pin 6 is slidably installed in the slide groove 7, and the other end is fixedly connected to the lens support 2. The stroke of the industrial camera 3 along the optical axis 31 is determined by the number of rotations of the adjusting ring 4, which is the same as the sliding stroke of the guide pin 6 in the slide groove 7.

[0039] Due to the restriction of the sliding groove 7 on the side of the lens mounting 1, the guide pin 6 can only move along the optical axis 31, thus restricting the industrial camera 3 and the lens support 2 to move only along the optical axis 31 and not to rotate.

[0040] In one embodiment, combined with Figure 3 As shown, the lens support 2 is pressed against the adjusting ring 4 by the guide pin 6.

[0041] In this embodiment, the guide pin 6 acts as a force-bearing component, driving the lens support 2 to move.

[0042] In one embodiment, combined with Figure 3 As shown, the elastic element 5 is a compression spring, which is set along the optical axis 31 on the side of the guide pin 6 away from the adjusting ring 4.

[0043] In one embodiment, combined with Figure 3 As shown, the lower part of the lens support 2 is fitted inside the compression spring.

[0044] In another embodiment, the elastic element 5 is a tension spring, which can be disposed on the outside of the lens mounting base 1, with one end fixedly connected to the top of the lens mounting base 1 and the other end fixedly connected to the outer end of the guide pin 6 extending out of the slide groove 7.

[0045] In one embodiment, there are multiple guide units, and the multiple guide units are arranged around the optical axis 31.

[0046] In one particular embodiment, combined with Figure 2 As shown, there are two guide units, and the two guide units are arranged around the optical axis 31.

[0047] In one embodiment, a stop 21 is provided on the outer side of the lens support 2 to prevent the adjustment ring 4 from being twisted off.

[0048] Below, refer to Figures 1 to 4 The following describes the method of using the industrial camera focusing adjustment structure of the present invention as shown in Embodiment 1 during the focusing process.

[0049] During installation, the industrial camera 3 is fixed to the lens support 2, the adjusting ring 4 is fitted onto the lens support 2, and the compression spring is fitted onto the lower part of the lens support 2 and inserted into the lens mounting base 1 together with it. The adjusting ring 4 and the lens mounting base 1 are connected by threads. The guide pin 6 extends from the sliding groove 7 on the side of the lens mounting base 1 into the lens mounting base 1 and is fixedly connected to the lens support 2. Under the action of the compression spring, the lens support 2 pushes upward, causing the guide pin 6 on the lens support 2 to press against the adjusting ring 4. Restricted by the sliding groove 7 on the side of the lens mounting base 1, the guide pin 6 can only move along the optical axis 31, thereby guiding the lens support 2 to move only along the optical axis 31, thus restricting the industrial camera 3, which is fixedly mounted on the lens support 2, to move only along the optical axis 31 and cannot rotate.

[0050] During focusing, by turning the screwing part 41, the adjusting ring 4 rotates around the optical axis 31 and moves along the optical axis 31 relative to the lens fixing cylinder 1; the lens support 2 moves along the optical axis 31 relative to the lens fixing cylinder 1 under the drive of the adjusting ring 4 and the guidance of the guide unit, thereby realizing the movement of the industrial camera 3 along the optical axis 31 for manual focusing.

[0051] When the adjusting ring 4 rotates one revolution, the industrial camera 3 moves a distance of one thread pitch along the optical axis 31. The smaller the thread pitch, the higher the adjustment accuracy, which can achieve high-precision focusing adjustment.

[0052] This utility model provides a concept and method for a focus adjustment structure in an industrial camera. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A focus adjustment structure for an industrial camera, characterized in that, include: Lens mounting base (1); A lens support (2) is used to support an industrial camera (3) with an optical axis (31); the lens support (2) is connected to the lens mounting base (1) via a guide unit, the guide unit being used to guide the lens support (2) to move relative to the lens mounting base (1) along the optical axis (31). Adjusting ring (4), sleeved between the lens mounting base (1) and the adjusting ring (4) and threadedly connected to the lens mounting base (1), is used to make it rotate about the optical axis (31) and move along the optical axis (31) relative to the lens mounting base (1); And an elastic element (5) is disposed between the lens support (2) and the lens fixing cylinder (1); the lens support (2) is always pressed against the adjusting ring (4) along the optical axis (31) under the action of the elastic element (5).

2. The industrial camera focus adjustment structure according to claim 1, characterized in that, When the adjusting ring (4) is turned, the adjusting ring (4) rotates around the optical axis (31) and moves along the optical axis (31) relative to the lens fixing cylinder (1). The lens support (2) moves along the optical axis (31) relative to the lens fixing cylinder (1) under the drive of the adjusting ring (4) and the guidance of the guide unit, thereby realizing the movement of the industrial camera (3) along the optical axis (31).

3. The industrial camera focus adjustment structure according to claim 1 or 2, characterized in that, The outer end of the adjusting ring (4) is connected to a screwing part (41).

4. The industrial camera focus adjustment structure according to claim 3, characterized in that, The outer side of the screwing part (41) is provided with knurling (42).

5. The industrial camera focus adjustment structure according to claim 1 or 2, characterized in that, The guide unit includes a guide pin (6) and a slide groove (7). The slide groove (7) is opened on the side wall of the lens fixing cylinder (1). One end of the guide pin (6) is slidably installed in the slide groove (7), and the other end is fixedly connected to the lens support (2).

6. The industrial camera focus adjustment structure according to claim 5, characterized in that, The lens support (2) is pressed against the adjusting ring (4) by the guide pin (6).

7. The industrial camera focus adjustment structure according to claim 6, characterized in that, The elastic element (5) is a compression spring, which is located along the optical axis (31) on the side of the guide pin (6) away from the adjusting ring (4).

8. The industrial camera focus adjustment structure according to claim 7, characterized in that, The lower part of the lens support (2) is fitted inside the compression spring.

9. The industrial camera focus adjustment structure according to claim 6, characterized in that, The elastic element (5) is a tension spring. The tension spring can be set on the outside of the lens fixing cylinder (1), with one end fixedly connected to the top of the lens fixing cylinder (1) and the other end fixedly connected to the outer end of the guide pin (6) extending out of the slide groove (7).

10. The industrial camera focus adjustment structure according to claim 1 or 2, characterized in that, The guide unit is provided in multiple units, and the multiple guide units are arranged around the optical axis (31).

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