Variable image distance lens mechanism and irradiation-resistant camera

Abstract

The utility model relates to the technical field of camera shooting, in particular to a variable image distance lens and an irradiation-resistant camera, and the variable image distance lens mechanism comprises an outer ring; the lens group is movably arranged in the outer ring; and the adjusting assembly is used for driving the lens group to do linear motion so as to adjust the distance between the lens group and the image sensor. According to the camera, an existing prime lens is improved and can move, the distance between the lens piece and the light receiving COMS sensor is changed, namely, the image distance of the lens is changed, so that clear observation of objects at different distance levels is achieved, and then the camera can have the advantages of being resistant to vibration, large in observation range and the like at the same time.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, and more specifically, to a variable distance lens mechanism and a radiation-resistant camera. Background Technology

[0002] In nuclear industry applications, cameras are required for video surveillance of critical areas. To meet the requirements of various operating conditions, cameras need to possess at least one of the following characteristics:

[0003] 1. Good radiation resistance: Not only the camera's housing, circuit board, CMOS sensor, etc., but also the camera lens itself must have good radiation resistance.

[0004] 2. Excellent vibration resistance: The outer shell, circuit board and other components, including the lens body structure, must have good vibration resistance to reduce vibration.

[0005] 3. Wide observation range: It has a larger depth of field and a better field of view.

[0006] Of the above characteristics, radiation resistance is relatively easy to achieve, while vibration resistance and observation range are difficult to achieve simultaneously.

[0007] The main factors are that zoom lenses, while offering a good range of observation, have a complex internal zoom structure (comparing a large number of zoom lenses) and many parts, which not only increases the difficulty of achieving radiation protection but also results in poor vibration resistance, making them prone to damage in long-term mobile environments. On the other hand, fixed-focus lenses are the opposite of zoom lenses; their advantage is good vibration resistance, but their range of observation is not as good as that of zoom lenses.

[0008] Therefore, at present, we can only deploy radiation-resistant zoom cameras and radiation-resistant fixed-focus cameras in different monitoring areas according to the requirements of the working conditions. Utility Model Content

[0009] The main purpose of this invention is to propose a variable-distance lens mechanism and a radiation-resistant camera, which can simultaneously possess the characteristics of good radiation resistance, excellent vibration resistance, and a large observation range.

[0010] To solve the above-mentioned technical problems, on the one hand, this utility model proposes a variable image distance lens mechanism, including:

[0011] Outer ring;

[0012] The camera module is located within the outer ring.

[0013] And adjustment components for driving the lens assembly to make linear movements in order to adjust the distance between the lens assembly and the image sensor.

[0014] In the above technical solution, the lens group is further slidably disposed within the outer ring along the axial direction of the outer ring;

[0015] The adjustment components include hydraulic cylinders and electric cylinders.

[0016] In any of the above technical solutions, the adjustment component further includes:

[0017] The first slot is located on the outer wall of the outer ring, and the first slot is arc-shaped.

[0018] The inner cylinder is located inside the outer ring, and a second slot is opened on its outer wall. The second slot is elongated and its length direction is consistent with the axial direction of the inner cylinder.

[0019] The mounting base is located inside the inner cylinder, and the lens assembly is mounted on the mounting base;

[0020] The transmission rod has one end located on the first slot, and the other end passes through the first slot and the second slot before being connected to the mounting base;

[0021] And a drive unit for driving the outer ring to rotate;

[0022] During the rotation of the outer ring, the inner wall of the first groove of the outer ring applies a thrust to the transmission rod, causing the transmission rod to move along the length direction of the second groove on the inner cylinder, thereby driving the mounting base and lens assembly to move.

[0023] In any of the above technical solutions, the driving unit further includes:

[0024] The gear ring is located on the outer ring;

[0025] Gears mesh with gear rings;

[0026] And a motor, whose output end is connected to a gear.

[0027] In any of the above technical solutions, the drive unit further includes:

[0028] Motor mounting bracket, connected to the inner cylinder;

[0029] The motor is mounted on a motor mounting bracket.

[0030] In any of the above technical solutions, the lens assembly is further threaded onto the mounting base.

[0031] On the other hand, this utility model also proposes a radiation-resistant camera, comprising:

[0032] shell;

[0033] The image sensor is housed within the casing;

[0034] and the lens mechanism in any of the above technical solutions;

[0035] The lens mechanism is housed within the housing, and the adjustment component is used to adjust the distance between the lens assembly and the image sensor.

[0036] Beneficial effects: Compared with the prior art, this application improves the existing fixed-focus lens so that it can move. By changing the distance between the lens and the light-receiving CMOS sensor, that is, changing the image distance of the lens, clear observation of objects at different distances is achieved. This enables the camera to have the characteristics of vibration resistance and large observation range at the same time. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a three-dimensional structural diagram of the variable distance lens mechanism of this utility model;

[0039] Figure 2 This is an exploded view of the zoom lens mechanism of this utility model;

[0040] Figure 3 This is a schematic diagram of the internal structure of the image distance lens mechanism of this utility model;

[0041] Figure 4 This is a schematic diagram of the structure of the radiation-resistant camera of this utility model.

[0042] The annotations in the attached figures are explained as follows:

[0043] 100. Housing; 200. Image sensor; 1. Outer ring; 11. First slot; 2. Lens assembly; 3. Adjustment assembly; 31. Inner cylinder; 311. Second slot; 32. Mounting base; 33. Transmission rod; 34. Drive unit; 341. Gear ring; 342. Gear; 343. Motor; 344. Motor mounting base. Detailed Implementation

[0044] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0045] It should be noted that, as shown in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements.

[0046] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] This invention proposes a variable image distance lens mechanism and a radiation-resistant camera. The variable image distance lens refers to a lens that adjusts the image distance by changing the distance between the lens and the light-receiving CMOS sensor. By setting the lens in the radiation-resistant camera to be such a variable image distance lens, the camera's vibration resistance and observation range can be effectively improved.

[0050] The radiation-resistant camera of this application will be described in detail below through the following embodiments.

[0051] Example 1:

[0052] like Figures 1-4 As shown, in this embodiment, a radiation-resistant camera includes: a housing 100, an image sensor 200, and an image-distance zoom lens mechanism; the image sensor 200 is fixed inside the housing 100, while the image-distance zoom lens mechanism is movably disposed inside the housing 100. By adjusting the distance between the image-distance zoom lens mechanism and the image sensor 200, i.e., changing the image distance of the lens, clear observation of objects at different distances is achieved, thereby enabling the camera to have a large observation range and other characteristics.

[0053] Specifically, the zoom lens mechanism includes: an outer ring 1; a lens group 2 movably disposed within the outer ring 1; and an adjustment component 3 for driving the lens group 2 to perform linear movement to adjust the distance between the lens group 2 and the image sensor 200.

[0054] It should be noted that lens group 2 is a fixed-focus lens. Due to its simple structure, a fixed-focus lens has significantly better vibration resistance than a zoom lens. Therefore, by adopting the above solution, this embodiment enables the camera to simultaneously possess the advantages of excellent vibration resistance and a wide viewing range.

[0055] It should be noted that the image sensor 200 is a CMOS sensor.

[0056] Example 2:

[0057] This embodiment is a further improvement based on Embodiment 1.

[0058] In this embodiment, the lens group 2 is slidably disposed within the outer ring 1 along the axial direction of the outer ring 1;

[0059] Among them, the adjustment component 3 is a hydraulic cylinder and an electric cylinder.

[0060] There are many ways to allow the lens group 2 to move freely, such as using hydraulic cylinders, electric cylinders, or other electronically controlled structures.

[0061] Example 3:

[0062] This embodiment is a further improvement based on Embodiment 1.

[0063] like Figures 1-3As shown, in this embodiment, the adjustment component 3 includes: a first slot 11, disposed on the outer wall of the outer ring 1, the first slot 11 being arc-shaped; an inner cylinder 31, disposed inside the outer ring 1, with a second slot 311 opened on its outer wall, the second slot 311 being elongated, its length direction being consistent with the axial direction of the inner cylinder 31; a mounting base 32, disposed inside the inner cylinder 31, with the lens assembly 2 disposed on the mounting base 32; a transmission rod 33, one end of which is located on the first slot 11, and the other end passing through the first slot 11 and the second slot 311 and connected to the mounting base 32; and a driving part 34, used to drive the outer ring 1 to rotate;

[0064] During the rotation of the outer ring 1, the inner wall of the first groove 11 of the outer ring 1 applies a thrust to the transmission rod 33, causing the transmission rod 33 to move along the length direction of the second groove 311 on the inner cylinder 31, thereby driving the mounting base 32 and the lens assembly 2 to move.

[0065] To improve the overall vibration resistance of the camera, the movement of the lens assembly 2 on the outer ring 1 needs to be very smooth. Therefore, the adjustment assembly 3 has been optimized. Specifically, it includes an inner cylinder 31, a mounting bracket, a transmission rod 33, and a drive unit 34. The lens assembly 2 is mounted on the mounting bracket, which is installed inside the inner cylinder 31. The inner cylinder 31 is installed inside the outer ring 1. The inner cylinder 31 is fixed. By rotating the outer ring 1, the outer ring 1 applies a thrust to the transmission rod 33, causing the transmission rod 33 to move within the second slot 311 of the inner cylinder 31. This allows the lens assembly 2, located on the mounting bracket, to extend and retract smoothly, thereby changing the distance between the lens assembly 2 and the image sensor 200.

[0066] It should be noted that, in order to further improve the stability of the mounting frame and the lens group 2 on it when moving, multiple transmission rods 33 are provided and arranged along the circumferential direction of the mounting frame. The number of the first slot 11 on the outer ring 1 and the second slot 311 on the inner cylinder 31 are the same as the number of transmission rods 33 and correspond one-to-one.

[0067] It should be noted that the transmission rod 33 is a pin fixed on the mounting bracket.

[0068] It should be noted that lens assembly 2 is threaded onto mounting base 32 to facilitate the installation and removal of lens assembly 2.

[0069] Example 4:

[0070] This embodiment is a further improvement based on Embodiment 3.

[0071] like Figures 1-3 As shown, in this embodiment, the drive unit 34 includes: a gear ring 341 disposed on the outer ring 1; a gear 342 meshing with the gear ring 341; and a motor 343, the output end of which is connected to the gear 342.

[0072] The motor 343 drives the gear 342 to rotate, and the gear 342 drives the gear ring 341 to rotate. The outer ring 1 rotates synchronously with the gear ring 341. In this way, the motor 343 can ultimately drive the lens assembly 2 to perform telescopic movement.

[0073] It should be noted that the drive unit 34 also includes: a motor mounting base 344, which is connected to the inner cylinder 31;

[0074] The motor 343 is mounted on the motor mounting base 344.

[0075] The motor mounting bracket 344 is fixed inside the outer casing 100 and then connected to the inner cylinder 31, thus fixing the motor 343 and the inner cylinder 31.

[0076] It should be noted that the image sensor 200 is mounted and fixed on the motor mounting base 344. Since the motor mounting base 344 is fixed inside the housing 100, the distance between the lens group 2 and the image sensor 200 is adjusted when the lens group 2 moves.

[0077] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A zoom lens mechanism, characterized in that, include: Outer ring (1); The lens assembly (2) is movably positioned within the outer ring (1); And an adjustment component (3) for driving the lens group (2) to make linear movements to adjust the distance between the lens group (2) and the image sensor (200); The adjustment component (3) includes: The first slot (11) is provided on the outer wall of the outer ring (1), and the first slot (11) is arc-shaped; The inner cylinder (31) is located inside the outer ring (1), and a second slot (311) is provided on its outer wall. The second slot (311) is long and its length direction is consistent with the axial direction of the inner cylinder (31). Mounting base (32) is disposed inside the inner cylinder (31), and lens assembly (2) is disposed on the mounting base (32); The transmission rod (33) has one end located on the first slot (11) and the other end passing through the first slot (11) and the second slot (311) and then connected to the mounting base (32); and a drive unit (34) for driving the outer ring (1) to rotate; During the rotation of the outer ring (1), the inner wall of the first groove (11) of the outer ring (1) applies a thrust to the transmission rod (33), causing the transmission rod (33) to move along the length direction of the second groove (311) on the inner cylinder (31), thereby driving the mounting base (32) and the lens assembly (2) to move.

2. The variable image distance lens mechanism as described in claim 1, characterized in that, The drive unit (34) includes: A toothed ring (341) is disposed on the outer ring (1); The gear (342) meshes with the gear ring (341); And a motor (343), the output end of which is connected to the gear (342).

3. The variable image distance lens mechanism as described in claim 2, characterized in that, The drive unit (34) also includes: The motor mounting bracket (344) is connected to the inner cylinder (31); The motor (343) is mounted on the motor mounting base (344).

4. The variable image distance lens mechanism as described in claim 1, characterized in that, The lens assembly (2) is threaded onto the mounting base (32).

5. A radiation-resistant camera, characterized in that, include: Outer shell (100); An image sensor (200) is disposed within the housing (100); And the lens mechanism as described in any one of claims 1-4; The lens mechanism is located inside the housing (100), and the adjustment component (3) is used to adjust the distance between the lens group (2) and the image sensor (200).

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