Lens and imaging device

Abstract

The utility model relates to a lens, including movable lens and focusing structure, focusing structure includes focusing support, focusing silk mother and focusing screw rod, focusing support fixed connection in movable lens's lens barrel, focusing silk mother sets up on focusing support and its axial parallel movable lens's axial, focusing screw rod is screwed with focusing silk mother and sets up to movable lens's image side extension, the extension tail end of focusing screw rod is connected with the focusing hand wheel for driving its rotation around the own axis. In addition still provide a kind of imaging equipment using above-mentioned lens barrel, imaging chip is located between movable lens and focusing hand wheel. In the utility model, connecting focusing support on movable lens and connecting screw rod mechanism by focusing support, and focusing screw rod sets up to movable lens's image side extension, not only can realize long distance focusing, but also can make the radial dimension of lens smaller;Focusing hand wheel and the lens barrel of lens are relatively separated, more suitable for single-handed operation, and use experience is better.

Description

Technical Field

[0001] This utility model belongs to, and particularly relates to, a lens and an imaging device equipped with the lens. Background Technology

[0002] In imaging devices such as infrared imaging apparatus, focusing is required to ensure image sharpness. Current focusing methods typically employ a focusing tube, where the focusing position and lens structure are integrated. This results in a relatively large radial dimension, limiting the diversity of appearance design and miniaturization.

[0003] In addition, existing infrared imaging devices are large in size and cannot be operated with one hand. Even if some infrared imaging devices can be handheld, the operator often needs to use the other hand to adjust the focus, so the flexibility and user experience need to be improved. Utility Model Content

[0004] This utility model relates to a lens and an imaging device equipped with the lens, which can at least solve some of the defects of the prior art.

[0005] This utility model relates to a lens, including a movable lens and a focusing structure. The focusing structure includes a focusing bracket, a focusing nut, and a focusing screw. The focusing bracket is fixedly connected to the lens barrel of the movable lens. The focusing nut is disposed on the focusing bracket and its axis is parallel to the axis of the movable lens. The focusing screw is screwed to the focusing nut and extends toward the image side of the movable lens. The extended end of the focusing screw is connected to a focusing handwheel for driving it to rotate around its own axis.

[0006] As one embodiment, the focusing structure further includes a focusing spring, which is sleeved on the focusing screw, with one end abutting against the focusing bracket and the other end abutting against the positioning shoulder formed on the focusing screw.

[0007] As one embodiment, a nut positioning groove is formed on the focusing bracket, the focusing screw nut is embedded in the nut positioning groove, and the focusing screw extends into the nut positioning groove and is screwed to the focusing screw nut.

[0008] As one embodiment, the focusing bracket is strip-shaped, with one end fixedly connected to the movable lens and the other end extending toward the image side of the movable lens, and the focusing nut is disposed at the extended tail end of the focusing bracket.

[0009] As one embodiment, the focusing screw is provided with a limiting shoulder for engaging with a constraint portion on the main body of the imaging device to limit its axial displacement.

[0010] As one embodiment, the lens also includes a fixed lens, which is coaxially disposed on the object side of the movable lens. The fixed lens is provided with a lens barrel support, and the lens barrel of the movable lens is slidably disposed on the lens barrel support.

[0011] This utility model also relates to an imaging device, including an imaging chip and a lens as described above, wherein the imaging chip is located between the movable lens and the focusing handwheel.

[0012] As one embodiment, the imaging device also includes a handheld device housing, in which the imaging chip, the movable lens, the focusing bracket, the focusing screw and the focusing nut are all disposed, and a focusing port is provided on the side of the device housing, through which the focusing handwheel is partially exposed.

[0013] As one implementation method, a sealing ring is fitted on the focusing screw, and the sealing ring is positioned close to the focusing port.

[0014] As one implementation method, the sealing ring is interference-fitted with the inner wall of the housing at the focusing port.

[0015] This utility model has at least the following beneficial effects:

[0016] In this invention, a focusing bracket is connected to the movable lens, and a lead screw mechanism is connected to the focusing bracket. Furthermore, the focusing lead screw extends towards the image side of the movable lens, enabling long-distance focusing and reducing the radial dimension of the lens. The focusing handwheel is relatively separate from the lens barrel, making it more suitable for one-handed operation and providing a better user experience.

[0017] This utility model further has the following beneficial effects:

[0018] In this invention, by setting a focusing spring, not only can the stability of manual focusing operation be improved, but more importantly, the preload provided by the focusing spring can eliminate the gap that may occur in the axial movement of the focusing screw and ensure the tightness of the threaded contact between the focusing screw and the focusing nut, thereby effectively improving the focusing accuracy; in addition, it can also ensure that the focusing structure is not easily affected by accidental touch, drop or impact.

[0019] This utility model further has the following beneficial effects:

[0020] In this invention, the device housing is suitable for being held by one hand, allowing the operator to perform focusing operations with the fingers of that hand while holding the device housing. This enables the operator to hold the imaging device and perform focusing operations with one hand, which greatly improves the flexibility of the imaging device and the user's experience. Attached Figure Description

[0021] 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.

[0022] Figure 1 A schematic diagram of the lens structure provided in an embodiment of this utility model;

[0023] Figure 2 This is an exploded view of the lens provided in an embodiment of the present invention. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1

[0026] like Figure 1 and Figure 2 This utility model provides a lens, including a movable lens 1 and a focusing structure. The focusing structure includes a focusing bracket 21, a focusing nut 22, and a focusing screw 23. The focusing bracket 21 is fixedly connected to the lens barrel of the movable lens 1. The focusing nut 22 is disposed on the focusing bracket 21 and its axis is parallel to the axis of the movable lens 1. The focusing screw 23 is screwed to the focusing nut 22 and extends toward the image side of the movable lens 1. The extended tail end of the focusing screw 23 is connected to a focusing handwheel 24 for driving it to rotate around its own axis.

[0027] Preferably, such as Figure 1 and Figure 2 The lens also includes a fixed lens 3, which is coaxially mounted on the object side of the movable lens 1. A lens barrel support 11 is provided on the fixed lens 3, and the lens barrel of the movable lens 1 is slidably mounted on the lens barrel support 11. The sliding direction of the movable lens 1 is parallel to the axial direction of the fixed lens 3. A sliding guide rail can be correspondingly provided on the lens barrel support 11, and the guiding direction of the sliding guide rail is parallel to the axial direction of the fixed lens 3. Focusing can be achieved by moving the movable lens 1 relative to the fixed lens 3 through a focusing structure.

[0028] For ease of description, the lens barrel of movable lens 1 is defined as movable lens barrel.

[0029] The focusing bracket 21 is preferably detachably connected to the movable lens barrel, including but not limited to using screws or other detachable connectors to directly fix the focusing bracket 21 to the movable lens barrel.

[0030] The distance between the focusing bracket 21 and the axis of the movable lens barrel is approximately equal to or slightly larger than the outer diameter of the movable lens barrel. Optionally, the distance between the axis of the focusing screw 23 and the axis of the movable lens barrel is equal to or close to the outer diameter of the movable lens barrel.

[0031] In one embodiment, such as Figure 1 and Figure 2 The focusing bracket 21 has a nut positioning groove, the focusing nut 22 is fitted into the nut positioning groove, and the focusing screw 23 extends into the nut positioning groove and is screwed to the focusing nut 22. The nut positioning groove not only enables the installation of the focusing nut 22, but also effectively restricts its rotation, ensuring reliable screw-screw engagement between the focusing screw 23 and the focusing nut 22, and improving focusing accuracy.

[0032] The aforementioned nut positioning groove can be a stepped groove, or in other words, a clearance groove is provided on the side of the nut positioning groove near the movable lens 1. This clearance groove can provide the space required for the movement of the focusing screw 23 to ensure that the required focusing stroke can be met.

[0033] In one embodiment, such as Figure 1 and Figure 2 The focusing bracket 21 is strip-shaped, with one end fixedly connected to the movable lens 1 and the other end extending toward the image side of the movable lens 1. The focusing wire nut 22 is located at the extended tail end of the focusing bracket 21.

[0034] When the focusing bracket 21 is provided with a nut positioning groove, the nut positioning groove is located at the extended tail end of the focusing bracket 21.

[0035] The length direction of the focusing bracket 21 is parallel to the axis of the movable lens 1.

[0036] The focusing bracket 21 has a certain length and can span the imaging chip set on the image side of the movable lens 1, so that the focusing handwheel 24 will not interfere with the imaging.

[0037] In one embodiment, the focusing bracket 21 is a telescopically lockable rod-shaped member; and / or, the focusing bracket 21 is a hollow tube, and the focusing screw 23 can extend into the cavity of the focusing bracket 21. In this design, the focusing stroke can be adjusted by adjusting the length between focuses, and / or adjusting the initial screw position of the focusing screw 23 and the focusing nut 22, thus improving the flexibility and reliability of the focusing operation. For the telescopically lockable rod-shaped member structure, locking after the rod-shaped member is achieved by means including but not limited to a conical sleeve fit structure, a spring pin self-locking mechanism, etc.

[0038] In one embodiment, such as Figure 1 and Figure 2 The focusing screw 23 has a limiting shoulder 231 formed on it to cooperate with the constraint part on the imaging device body to limit its axial displacement. This limiting shoulder 231 constrains the focusing screw 23, preventing axial displacement and ensuring that the focusing screw 23 only rotates. This guarantees the reliability and accuracy of driving the focusing nut 22 and the focusing bracket 21, causing the focusing bracket 21 to move the movable lens 1 closer to or away from the focusing screw 23 and the focusing handwheel 24, thus achieving the focusing purpose. Of course, the constraint on the axial displacement of the focusing screw 23 is not limited to the above method; for example, tapered roller bearings or similar devices can also be used for limiting the focusing screw 23.

[0039] Further optimize the aforementioned lenses, such as Figure 1 and Figure 2 The focusing structure also includes a focusing spring 25, which is sleeved on the focusing screw 23. One end of the focusing spring 25 abuts against the focusing bracket 21, and the other end abuts against a positioning shoulder formed on the focusing screw 23. When the focusing screw 23 makes axial translational movement, there is a relative movement between it and the focusing spring 25, which can compress or release the focusing spring 25. By setting the focusing spring 25, not only can the smoothness of manual focusing operation be improved, but more importantly, by providing preload through the focusing spring 25, the possible backlash in the axial movement of the focusing screw 23 can be eliminated, and the tightness of the threaded contact between the focusing screw 23 and the focusing nut 22 can be ensured, thereby effectively improving focusing accuracy. In addition, it can also ensure that the focusing structure is not easily affected by accidental contact, drops, or impacts.

[0040] In the case where the limiting shoulder 231 is provided, the limiting shoulder 231 can constitute the positioning shoulder mentioned above, that is, the other end of the focusing spring 25 abuts against the limiting shoulder 231.

[0041] Example 2

[0042] This utility model provides an imaging device, including an imaging chip and the lens provided in the first embodiment above. The imaging chip is located between the movable lens 1 and the focusing handwheel 24.

[0043] Furthermore, the imaging device also includes a handheld device housing. The imaging chip, the movable lens 1, the focusing bracket 21, the focusing screw nut 22, and the focusing screw 23 are all located inside the device housing. When a fixed lens 3 is provided, the lens barrel of the fixed lens 3 can be part of the device housing or protrude outside the device housing.

[0044] Preferably, the device housing has a focusing port on its side, and the focusing handwheel 24 is partially exposed from the focusing port.

[0045] The aforementioned device housing is designed for handheld use, more specifically, for single-handed operation. Accordingly, the housing has a grip area, and the focusing port is located within this grip area. This allows the operator to perform focusing operations using their fingers while holding the housing with one hand, thus enabling single-handed operation of the imaging device and focusing. This significantly improves the flexibility of the imaging device and enhances the user experience.

[0046] In one embodiment, such as Figure 1 and Figure 2 A sealing ring 26 is fitted on the focusing screw 23. The sealing ring 26 is located close to the focusing port, which can improve the waterproof and dustproof performance of the imaging device, especially preventing water and dust from penetrating into components such as the imaging chip.

[0047] Furthermore, the sealing ring 26 is interference-fitted with the inner wall of the housing at the focusing port. The sealing ring 26 not only serves a waterproof function, but also achieves a focusing damping effect, thus achieving the design effect of damped focusing. This can further improve focusing accuracy and user experience.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens, comprising a movable lens element and a focusing structure, characterized in that: The focusing structure includes a focusing bracket, a focusing nut, and a focusing screw. The focusing bracket is fixedly connected to the lens barrel of the movable lens. The focusing nut is disposed on the focusing bracket and its axis is parallel to the axis of the movable lens. The focusing screw is screwed to the focusing nut and extends toward the image side of the movable lens. The extended end of the focusing screw is connected to a focusing handwheel for driving it to rotate around its own axis.

2. The lens as described in claim 1, characterized in that: The focusing structure also includes a focusing spring, which is sleeved on the focusing screw, with one end abutting against the focusing bracket and the other end abutting against the positioning shoulder formed on the focusing screw.

3. The lens as described in claim 1, characterized in that: The focusing bracket has a nut positioning groove, the focusing screw nut is embedded in the nut positioning groove, and the focusing screw extends into the nut positioning groove and is screwed to the focusing screw nut.

4. The lens as described in any one of claims 1 to 3, characterized in that: The focusing bracket is strip-shaped, with one end fixedly connected to the movable lens and the other end extending toward the image side of the movable lens. The focusing nut is located at the extended tail end of the focusing bracket.

5. The lens as described in claim 1, characterized in that: The focusing screw has a limiting shoulder formed on it to cooperate with the constraint part on the main body of the imaging device to limit its own axial displacement.

6. The lens as described in claim 1, characterized in that: It also includes a fixed lens, which is coaxially disposed on the object side of the movable lens. The fixed lens is provided with a lens barrel support, and the lens barrel of the movable lens is slidably disposed on the lens barrel support.

7. An imaging device, characterized in that: It includes an imaging chip and a lens as described in any one of claims 1 to 6, wherein the imaging chip is located between the movable lens and the focusing wheel.

8. The imaging device as described in claim 7, characterized in that: It also includes a handheld device housing, in which the imaging chip, the movable lens, the focusing bracket, the focusing screw and the focusing nut are all disposed, and a focusing port is provided on the side of the device housing, through which the focusing handwheel is partially exposed.

9. The imaging device as described in claim 8, characterized in that: A sealing ring is fitted onto the focusing screw, and the sealing ring is positioned close to the focusing port.

10. The imaging device as described in claim 9, characterized in that: The sealing ring is interference-fitted with the inner wall of the housing at the focusing port.

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