Focusing mechanism and imaging device
By employing a simple mechanical focusing mechanism in industrial cameras, low-cost manual focusing and real-time focus distance display are achieved, solving the problems of high-cost autofocus systems and lack of focus distance information in existing technologies, and improving the accuracy and safety of user operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-03-03
AI Technical Summary
Existing autofocus systems for industrial cameras are costly and do not provide focus distance information, so users cannot know the current focus distance in real time.
It employs a simple mechanical focusing mechanism, including a lens holder, an adjustment shaft, a focus distance indicator, and a transmission mechanism. The focus distance is adjusted manually and displayed in real time mechanically.
It achieves low-cost manual focus, allows precise adjustment of the camera's focus distance, and displays the focus distance in real time, reducing equipment costs and improving security.
Smart Images
Figure CN223967914U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of imaging equipment, and more specifically, to a focusing mechanism and an imaging device. Background Technology
[0002] Industrial cameras are widely used in industrial production. They can be used to monitor and inspect various processes and equipment on production lines. They can capture and transmit video images in real time, helping operators monitor abnormalities, malfunctions, or quality problems in the production process and take timely measures to adjust or repair them.
[0003] Some known industrial cameras are equipped with autofocus systems or liquid lenses to enable them to autofocus in real time.
[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0005] One aspect of this application addresses the technical problem of how to achieve manual focusing of an industrial camera and enable users to know the current focusing distance of the camera in real time.
[0006] In addition, other aspects of this application are also intended to solve or alleviate other technical problems existing in the prior art.
[0007] This application provides a focusing mechanism and an imaging device. Specifically, according to one aspect of this application, the following is provided:
[0008] A focusing mechanism, comprising:
[0009] A lens holder in which a lens is mounted;
[0010] An adjustment shaft, the axial direction of which is perpendicular to the optical axis of the lens;
[0011] A rotatable focus distance indicator, wherein the axial direction of the focus distance indicator is parallel to the axial direction of the adjustment shaft;
[0012] A first transmission mechanism is connected to the adjustment shaft and the lens holder. The first transmission mechanism is capable of converting the rotational motion of the adjustment shaft into linear motion of the lens holder along the optical axis of the lens.
[0013] The second transmission mechanism is connected to the adjustment shaft and the focus distance indicator, and the second transmission mechanism can convert the rotational motion of the adjustment shaft into the rotational motion of the focus distance indicator.
[0014] Optionally, according to one embodiment of this application, the lens holder includes a lens receiving portion and a connecting shaft connected to each other, and the connecting shaft is provided with threads, and the lens holder is screwed onto a base for fixing the lens holder by the threads on the connecting shaft.
[0015] Optionally, according to one embodiment of this application, the first transmission mechanism includes a pair of bevel gears that mesh with each other, a pair of cylindrical gears, and a first intermediate shaft arranged parallel to the connecting shaft. The pair of bevel gears includes a driving bevel gear disposed on the adjusting shaft and a driven bevel gear disposed on the first intermediate shaft. The pair of cylindrical gears includes a first cylindrical gear disposed on the first intermediate shaft and a second cylindrical gear disposed on the connecting shaft.
[0016] Optionally, according to one embodiment of this application, at least one of the driving bevel gear, driven bevel gear, first cylindrical gear, and second cylindrical gear is configured with resilient teeth.
[0017] Optionally, according to one embodiment of this application, the first cylindrical gear and the second cylindrical gear each include an inner ring and an annular tooth portion surrounding the inner ring connected in sequence, wherein the inner ring is made of a rigid material and the annular tooth portion is made of silicone rubber.
[0018] Optionally, according to one embodiment of this application, the hardness of the annular teeth is between 10HA and 80HA.
[0019] Optionally, according to one embodiment of this application, the second transmission mechanism includes a second intermediate shaft arranged parallel to the adjustment shaft and three sequentially meshing cylindrical gears, the three sequentially meshing cylindrical gears including a third cylindrical gear disposed on the adjustment shaft, a fourth cylindrical gear disposed on the second intermediate shaft and a fifth cylindrical gear coaxially disposed with the focus distance indicator dial.
[0020] Optionally, according to one embodiment of this application, an annular buckle is connected axially to the inner ring of the second cylindrical gear, which can be fitted onto the connecting shaft together with the second cylindrical gear. The annular buckle is provided with at least one engaging portion, and a notch corresponding to the position of the at least one engaging portion is provided on the wall of the lens receiving portion. The annular buckle is engaged into the notch of the lens receiving portion through the engaging portion.
[0021] According to another aspect of this application, this application provides an imaging device, which includes the focusing mechanism, lens, base and housing described above. The lens is mounted in a lens holder, the lens holder is mounted on the base, and the lens holder, base, first transmission mechanism and second transmission mechanism are all disposed within the housing. One end of the adjustment shaft is disposed on the side of the housing, and an adjustment notch is provided on the end, which can be inserted into the adjustment notch to drive the adjustment shaft to rotate.
[0022] Optionally, according to another embodiment of this application, the focus distance indicator is rotatably disposed on the side, an indicator mark is provided on the focus distance indicator, and a focus distance scale is provided on the housing around the focus distance indicator, the indicator mark correspondingly pointing to the focus distance scale that is equal to the current focus distance of the lens.
[0023] The advantages of this application include:
[0024] 1. One embodiment of this application proposes a focusing mechanism that enables manual focusing by the user using a simple mechanical mechanism and displays the current camera focusing distance in real time using a purely mechanical method. The focusing method is simple and can achieve high adjustment accuracy, and greatly reduces the overall cost of the camera.
[0025] 2. One embodiment of this application proposes a focusing mechanism that uses elastic teeth to transmit focusing torque, thereby controlling the focusing torque within an appropriate range and effectively preventing damage to the mechanism due to excessive torque applied by the user during focusing. Attached Figure Description
[0026] Referring to the accompanying drawings, the above and other features of this application will become apparent. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein...
[0027] Figure 1 A schematic diagram of a focusing mechanism disposed in an imaging device according to an embodiment of this application is shown.
[0028] Figure 2 A schematic diagram of the structure of the first transmission mechanism of the focusing mechanism according to one embodiment of this application is shown;
[0029] Figure 3 Showing according to Figure 2 Cross-sectional views of the first and second cylindrical gears;
[0030] Figure 4A schematic diagram of the structure of the second transmission mechanism of the focusing mechanism according to one embodiment of this application is shown;
[0031] Figure 5 A schematic diagram of an imaging apparatus according to one embodiment of this application is shown. Detailed Implementation
[0032] It is readily understood that, based on the technical solution of this application, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of this application.
[0033] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," "third," and similar expressions are used for descriptive and distinguishing purposes only and should not be construed as indicating or implying the relative importance of the corresponding components or the order of components or assembly sequence.
[0034] In some known industrial cameras, autofocus systems or liquid lenses are used to achieve fully automated operation, enabling real-time automatic focusing without requiring user intervention. However, industrial cameras equipped with autofocus systems or liquid lenses are typically expensive, posing a significant cost burden when deploying a large number of cameras. Furthermore, cameras with autofocus typically do not provide the user with current focus distance (i.e., object distance) information.
[0035] One embodiment of this application proposes a focusing mechanism 100 that employs a simple and low-cost mechanical mechanism, allowing users to adjust the camera's focusing distance through simple manual operation, and mechanically displaying the current camera focusing distance, i.e., the current camera object distance, to the user in real time. (Reference) Figure 1 This illustration shows a schematic diagram of a focusing mechanism 100 according to an embodiment of the present application disposed in an imaging device 10, which is particularly configured as a camera, such as an industrial camera. The focusing mechanism 100 includes a lens holder 110, an adjustment shaft 120, a focus distance indicator 130, a first transmission mechanism 140, and a second transmission mechanism 150 (in...). Figure 1(Not shown due to obstruction by the housing). A lens is mounted in the lens holder 110 (in... Figure 1 (Not shown in the image), the lens is fixed in the housing 300 of the imaging device 10 by the lens holder 110. The adjustment shaft 120 is used to adjust the focus distance of the camera, and its axial direction is set perpendicular to the optical axis O of the lens (the optical axis O is in the direction of the lens). Figure 1 (Shown by dashed lines). The focus distance indicator 130 is mounted on the housing 300 of the imaging device 10 and is rotatable relative to the housing 300. The axial direction of the focus distance indicator 130 is parallel to the axial direction of the adjustment shaft 120, that is, perpendicular to the optical axis of the lens. The first transmission mechanism 140 is connected to the adjustment shaft 120 and the lens holder 110 respectively, and can convert the rotational movement of the adjustment shaft 120 into linear movement of the lens holder 110 along the optical axis of the lens. Thus, by rotating the adjustment shaft 120, the axial position of the lens on its optical axis O can be changed, thereby adjusting the focus distance of the camera. The second transmission mechanism 150 is connected to the adjustment shaft 120 and the focus distance indicator 130 respectively, and the second transmission mechanism 150 can convert the rotational movement of the adjustment shaft 120 into the rotational movement of the focus distance indicator 130. In other words, when the adjustment shaft 120 rotates, it not only drives the lens holder 110 to move along its axial direction, but also drives the focus distance indicator 130 to rotate. By calculating the proportional relationship between the change in the camera's focus distance and the rotation angle of the adjustment shaft 120, as well as the rotation angle of the adjustment shaft 120 and the rotation angle of the focus distance indicator 130, the geometric relationship between the change in the camera's focus distance and the rotation angle of the focus distance indicator 130 can be calculated. Thus, the change in the camera's focus distance can be indicated by the focus distance indicator 130.
[0036] In one embodiment of this application, the lens holder 110 includes a lens receiving portion 111 and a connecting shaft 113 connected to each other. A thread is provided on the connecting shaft 113, and the lens holder 110 is screwed onto a base 200 for fixing the lens holder 110 via the thread on the connecting shaft 113. A threaded hole matching the thread on the connecting shaft 113 is provided on the base 200. When the lens holder 110 rotates about the connecting shaft 113, the lens holder 110 screws into the threaded hole of the base 160 via the thread on the connecting shaft 113, thereby changing the height of the lens holder 110 relative to the base 200, i.e., enabling movement of the lens holder 110 in the optical axis direction of the lens. Those skilled in the art should understand that the lens holder 110 can also be connected to the base 200 or the housing 300 of the imaging device 10 in any other manner capable of movement in the optical axis direction of the lens, and this should also be included within the scope of protection of this application.
[0037] refer to Figure 2This diagram illustrates the structure of a first transmission mechanism 140 of a focusing mechanism 100 according to an embodiment of this application. In this embodiment, the first transmission mechanism 140 includes a pair of meshing bevel gears, a pair of cylindrical gears, and a first intermediate shaft 141 arranged parallel to the connecting shaft 113. The bevel gear pair includes a driving bevel gear 142 disposed on the adjusting shaft 120 and a driven bevel gear 143 disposed on the first intermediate shaft 141. The bevel gear pair is mainly used for reversing rotational motion, converting rotational motion around the adjusting shaft 120 into rotational motion around the first intermediate shaft 141. The cylindrical gear pair includes a first cylindrical gear 144 disposed on the first intermediate shaft 141 and a second cylindrical gear 145 disposed on the connecting shaft 113. The cylindrical gear pair converts rotational motion of the first intermediate shaft 141 into rotational motion of the lens holder 110, thereby enabling the lens holder 110 to be rotated in the base 200 to change the position of the lens holder 110 along the optical axis of the lens.
[0038] It should be understood that the first transmission mechanism 140 may also use only bevel gears for transmission. In this case, the first intermediate shaft 141 may be omitted, and the driven bevel gear 143 may be directly mounted on the connecting shaft 113. Alternatively, the cylindrical gear may be replaced with other transmission mechanisms that do not change the transmission direction, such as belt transmission mechanisms or chain transmission mechanisms. The first transmission mechanism 140 may also use any other transmission mechanism that can change the transmission direction, such as ramp transmission mechanisms or worm gear transmission mechanisms, to convert the rotational motion of the adjusting shaft 120 into linear motion of the lens holder 110 along the optical axis of the lens. All of these should be included within the scope of protection of this application.
[0039] In one embodiment of this application, at least one of the driving bevel gear 142, driven bevel gear 143, first cylindrical gear 144, and second cylindrical gear 145 is configured with resilient teeth. To prevent the user from applying excessive adjustment torque to the focusing mechanism 100 or applying adjustment torque even at the extreme focusing distance, which could cause deformation or breakage of the gear teeth, in this embodiment, at least one of the driving bevel gear 142, driven bevel gear 143, first cylindrical gear 144, and second cylindrical gear 145 is configured with resilient teeth. When the torque on the meshing teeth is too large, the resilient teeth will deform and spring out of the meshed state without damage, thus preventing any impact on subsequent focusing distance adjustment operations.
[0040] refer to Figure 3 It shows according to Figure 2 Cross-sectional view of the first cylindrical gear 144 and the second bevel gear 145. Figure 3In this embodiment, the teeth of the first cylindrical gear 144 and the second cylindrical gear 145 are configured as elastic teeth. Further, the first cylindrical gear 144 and the second cylindrical gear 145 respectively include inner rings 101 and 103 connected in sequence, and annular tooth portions 102 and 104 surrounding the inner rings 101 and 103. The inner rings 101 and 103 are made of rigid material, and the annular tooth portions 102 and 104 are made of silicone rubber. The structure of the inner rings 101 and 103 plus the annular tooth portions 102 and 104 is beneficial in increasing the strength and stability of the cylindrical gears with elastic teeth during installation, and also simplifies the overall manufacturing of such cylindrical gears. Further, the hardness of the annular tooth portions 102 and 104 is between 10HA and 80HA, which allows the annular tooth portions 102 and 104 to withstand sufficient torque to achieve power transmission, and to undergo elastic deformation and spring away from the meshing state when subjected to excessive adjusting torque.
[0041] refer to Figure 4 The diagram illustrates a schematic of the second transmission mechanism 150 of a focusing mechanism 100 according to one embodiment of this application. In this embodiment, the second transmission mechanism 150 includes a second intermediate shaft 151 arranged parallel to the adjustment shaft 120 and three sequentially meshing cylindrical gears. The three sequentially meshing cylindrical gears include a third cylindrical gear 152 disposed on the adjustment shaft 120, a fourth cylindrical gear 153 disposed on the second intermediate shaft 151, and a fifth cylindrical gear 154 coaxially disposed with the focusing distance indicator 130. The fifth cylindrical gear 154 is integrally formed with the focusing distance indicator 130. The second transmission mechanism 150 is particularly configured as a speed reduction transmission mechanism, thereby enabling the large rotation angle of the adjustment shaft 120 to be converted into a small rotation angle of the focusing distance indicator 130, so that the focusing distance indicator 130 can indicate changes in focusing distance within a 360° angle. The arrangement of the second intermediate shaft 151 and the fourth cylindrical gear 153 thereon facilitates the flexible arrangement of the focus distance indicator 130 on the camera housing 300, without necessarily having to be in contact with the adjustment shaft 120.
[0042] Those skilled in the art should understand that the second intermediate shaft 151 and the fourth cylindrical gear 153 may be omitted, and the fifth cylindrical gear 154 may directly mesh with the third cylindrical gear 152; the second transmission mechanism 150 may also adopt other transmission methods besides gear transmission, such as belt transmission, chain transmission, etc., which should also be included within the scope of protection of this application.
[0043] In one embodiment of this application, an annular snap fastener 105 (see reference) is axially connected to the inner ring 103 of the second cylindrical gear 145, which can be fitted together with the second cylindrical gear 145 onto the connecting shaft 113. Figure 2 and Figure 3The annular buckle 105 has at least one engaging portion 106, and the lens receiving portion 111 has a recess 112 corresponding to the position of the at least one engaging portion 106. The annular buckle 105 is engaged with the recess 112 of the lens receiving portion 111 through the engaging portion 106. The annular buckle 105 is preferably integrally formed with the inner ring 103 of the second cylindrical gear 145. Figure 2 In one embodiment, two opposing engaging portions 106 are provided on the annular buckle 105, and correspondingly, two corresponding recesses 112 are provided on the wall of the lens receiving portion 111. The engagement of the engaging portions 106 and the recesses 112 facilitates a more secure mounting of the second cylindrical gear 145 onto the connecting shaft 113 of the lens holder 110. In an embodiment not shown, a form-fitting portion, such as a protrusion or recess, may be provided on the inner side of the inner ring 103, and a matching form-fitting portion may be provided on the connecting shaft 113. The second cylindrical gear 145 and the connecting shaft 113 are fixed through this form-fitting engagement.
[0044] Another aspect of this application proposes an imaging device 10, which is particularly configured as an industrial camera. (Reference) Figure 5 It shows a schematic diagram of an imaging device 10 according to one embodiment of this application. The arrangement of the internal structure of the imaging device 10 can be referred to Figure 1 The imaging device 10 includes the aforementioned focusing mechanism 100, lens, base 200, and housing 300. The lens is mounted in a lens holder 110, particularly within a lens receiving portion 111. The lens holder 110 is mounted on the base 200, particularly screwed into a threaded hole on the base 200 via a connecting shaft 113. The lens holder 110, base 200, first transmission mechanism 140, and second transmission mechanism 150 are all housed within the housing 300. The housing 300 is particularly square in shape. One end 121 of the adjusting shaft 120 is located on the side of the housing 300, and an adjusting notch 122 is provided on this end 121, allowing the adjusting shaft to rotate by inserting an adjusting tool, such as a screwdriver, into the adjusting notch 122. An adjusting disc with a diameter larger than that of the adjusting shaft 120 may also be provided on the end 121 to increase the area of the end 121 and the adjusting notch 122, making it easier for the user to apply torque to the adjusting notch 122 to cause it to rotate. It should be understood that, in embodiments not shown, the end 121 of the adjusting shaft 120 may also be provided with a handle or rocker, and the user may rotate the adjusting shaft 120 by means of an adjusting tool or by hand.
[0045] In one embodiment of this application, the focus distance indicator 130 is rotatably disposed on the side of the housing 300, particularly on the same side as the end 121 of the adjustment shaft 120, so that the user can observe the rotation of the focus distance indicator 130 when rotating the adjustment shaft 120. An indicator mark 131 is provided on the focus distance indicator 130, and a focus distance scale 301 is provided around the focus distance indicator 130 on the housing 300, with the indicator mark 131 correspondingly pointing to the focus distance scale that is equal to the current lens focus distance.
[0046] For the focusing mechanism 100 of one embodiment of this application, the focusing distance (or object distance) of the camera is related to the displacement of the lens along its optical axis, which in turn is related to the rotation angle of the adjustment shaft 120 and the transmission ratio of the first transmission mechanism 140. Therefore, the current focusing distance can be obtained accordingly based on the maximum displacement of the lens along the optical axis, the rotation angle of the adjustment shaft 120, and the transmission ratio of the first transmission mechanism 140. Meanwhile, the rotation angle of the adjustment shaft 120 can be converted into the rotation angle of the focus distance indicator 130 through the transmission ratio of the second transmission mechanism 150. Through these two mathematical relationships, the relationship between the rotation angle of the focus distance indicator 130 and the focus distance can be obtained. Thus, before installing the imaging device 10, the relationship curve between the focus distance and the rotation angle of the focus distance indicator 130 can be determined by calibration. Then, by looking up a table, different focus distances can be matched one-to-one with the rotation angle of the focus distance indicator 130. Thus, the focus distance values corresponding to different rotation angles of the focus distance indicator 130 can be marked on the housing around the focus distance indicator 130.
[0047] In summary, the focusing mechanism and imaging device proposed in one embodiment of this application can accurately realize manual adjustment of the camera's focusing distance with a simple mechanical structure, and can accurately display the current focusing distance to the user through the focusing distance indicator, thereby reducing the manufacturing cost of industrial cameras with adjustable focusing distances. Furthermore, the focusing mechanism and imaging device proposed in one embodiment of this application can also prevent damage to the focusing mechanism caused by excessive adjustment by the user, thus improving the safety of the focusing mechanism.
[0048] It should be understood that all the above preferred embodiments are exemplary and not restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of this application should be within the scope of legal protection of this application.
Claims
1. A focusing mechanism (100), characterized in that, include: A lens holder (110) in which a lens is mounted; An adjustment shaft (120) is provided, the axial direction of which is perpendicular to the optical axis of the lens. A rotatable focus distance indicator (130) is provided, the axial direction of which is parallel to the axial direction of the adjustment shaft (120). A first transmission mechanism (140) is connected to the adjustment shaft (120) and the lens holder (110). The first transmission mechanism (140) can convert the rotational motion of the adjustment shaft (120) into linear motion of the lens holder (110) along the optical axis of the lens. The second transmission mechanism (150) is connected to the adjustment shaft (120) and the focus distance indicator (130). The second transmission mechanism (150) can convert the rotational motion of the adjustment shaft (120) into the rotational motion of the focus distance indicator (130).
2. The focusing mechanism (100) according to claim 1, characterized in that, The lens holder (110) includes a lens receiving portion (111) and a connecting shaft (113) connected to each other. The connecting shaft (113) is provided with threads, and the lens holder (110) is screwed onto a base (200) for fixing the lens holder (110) by the threads on the connecting shaft (113).
3. The focusing mechanism (100) according to claim 2, characterized in that, The first transmission mechanism (140) includes a pair of bevel gears that mesh with each other, a pair of cylindrical gears, and a first intermediate shaft (141) arranged parallel to the connecting shaft (113). The bevel gear pair includes a driving bevel gear (142) disposed on the adjusting shaft (120) and a driven bevel gear (143) disposed on the first intermediate shaft (141). The cylindrical gear pair includes a first cylindrical gear (144) disposed on the first intermediate shaft (141) and a second cylindrical gear (145) disposed on the connecting shaft (113).
4. The focusing mechanism (100) according to claim 3, characterized in that, At least one of the driving bevel gear (142), driven bevel gear (143), first cylindrical gear (144), and second cylindrical gear (145) is configured to have resilient teeth.
5. The focusing mechanism (100) according to claim 4, characterized in that, The first cylindrical gear (144) and the second cylindrical gear (145) each include an inner ring and an annular tooth portion surrounding the inner ring, which are connected in sequence. The inner ring (101, 103) is made of rigid material, and the annular tooth portion (102, 104) is made of silicone rubber.
6. The focusing mechanism (100) according to claim 5, characterized in that, The hardness of the annular teeth (102, 104) is between 10HA and 80HA.
7. The focusing mechanism (100) according to claim 1, characterized in that, The second transmission mechanism (150) includes a second intermediate shaft (151) arranged parallel to the adjustment shaft (120) and three sequentially meshing cylindrical gears. The three sequentially meshing cylindrical gears include a third cylindrical gear (152) disposed on the adjustment shaft (120), a fourth cylindrical gear (153) disposed on the second intermediate shaft (151), and a fifth cylindrical gear (154) coaxially disposed with the focus distance indicator (130).
8. The focusing mechanism (100) according to claim 5, characterized in that, An annular buckle (105) is axially connected to the inner ring of the second cylindrical gear (145) and can be fitted onto the connecting shaft (113) together with the second cylindrical gear (145). At least one snap-fit portion (106) is provided on the annular buckle (105). A notch (112) corresponding to the position of the at least one snap-fit portion (106) is provided on the wall of the lens receiving portion (111). The annular buckle (105) is snapped into the notch (112) of the lens receiving portion (111) through the snap-fit portion (106).
9. An imaging device (10), characterized in that, The device includes a focusing mechanism (100), a lens, a base (200), and a housing (300) according to any one of claims 1 to 8. The lens is mounted in a lens holder (110), which is mounted on the base (200). The lens holder (110), the base (200), the first transmission mechanism (140), and the second transmission mechanism (150) are all disposed within the housing (300). One end (121) of the adjusting shaft (120) is disposed on the side of the housing (300), and an adjusting notch (122) is provided on the end (121) so that an adjusting tool can be inserted into the adjusting notch (122) to drive the adjusting shaft (120) to rotate.
10. The imaging device (10) according to claim 9, characterized in that, The focus distance indicator (130) is rotatably disposed on the side, and an indicator mark (131) is provided on the focus distance indicator (130). A focus distance scale (301) is provided on the housing (300) around the focus distance indicator (130), and the indicator mark (131) points to the focus distance scale (301) that is equal to the current focus distance of the lens.