Reflection-type single lens reflex camera lens

Abstract

The utility model relates to the technical field of camera lenses, in particular to a reflective single lens reflex camera lens, which comprises a lens barrel, the lens barrel comprises a butt joint barrel connected with an external camera, an inner barrel is fixedly mounted at one end of the butt joint barrel, a focusing ring is rotatably attached to the outer side of the inner barrel, one end of the focusing ring is fixedly connected with a movable barrel, and the movable barrel is fixedly connected with a camera. The movable cylinder is connected with the inner cylinder in a screwed mode, and lens assemblies in the prior art are detachably installed and fixed in the butt joint cylinder and the movable cylinder. According to the utility model, the outer side of the lens cone of the lens is slidably sleeved with the first annular cover and the second annular cover, and after focusing of the focusing ring is completed, the second annular cover can be slid to enable the second annular cover and the first annular cover to be sleeved and protected on the outer side of the focusing ring, so that focal length change caused by the fact that fingers of a user mistakenly touch the focusing ring is effectively prevented; the lens cover is rotatably and slidably clamped at the open end of the light shield through the connecting column, so that the independent design of a traditional lens cover is omitted, and the lens cover is effectively prevented from being forgotten or lost after being disassembled.

Description

Technical Field

[0001] This utility model relates to the field of camera lens technology, specifically a reflex SLR camera lens. Background Technology

[0002] A reflex SLR camera uses a mirror to reflect light into the viewfinder so that the user can see an image that matches the image formed by the lens. The mechanical mechanism of a reflex SLR camera lens generally includes a lens barrel, with two lens groups (including convex lenses, concave lenses, aspherical lenses, etc.) arranged at both ends inside the lens barrel. A focus ring is rotatably connected to the outside of the lens barrel. The focal length of the lens is adjusted by rotating the focus ring to adjust the distance between the two lens groups. A lens hood is installed at one end of the lens barrel to block unwanted light from entering the lens. A lens cap is installed at the opening of the lens hood to protect the front lens of the lens.

[0003] The focus ring is usually located at the front or middle of the lens. In order to facilitate the user's rotation of the focus ring, the diameter of the focus ring is usually large. When shooting handheld, the finger can easily touch and rotate the focus ring, which can lead to accidentally adjusting the lens focus. However, most lenses currently lack a structure to prevent the user from accidentally touching the focus ring. In addition, the lens cap on most lenses is a separately designed small part that is easy to forget or lose after disassembly. The need to remove and reinstall the lens cap after each use of the lens also increases the inconvenience of using the lens. Utility Model Content

[0004] The purpose of this invention is to provide a reflective SLR camera lens to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A reflex SLR camera lens, comprising:

[0007] The lens barrel includes a docking tube, an inner tube is fixedly installed at one end of the docking tube, a focusing ring is rotatably attached to the outer side of the inner tube, and a movable tube is fixedly connected to one end of the focusing ring and screwed into the inner tube. Rotating the focusing ring in both directions can cause the movable tube to move left and right on the outer side of the inner tube.

[0008] Two lens assemblies are installed and fixed inside the docking cylinder and the movable cylinder, respectively.

[0009] A protective component is slidably sleeved with the movable cylinder. The protective component includes an annular cover one, and an annular cover two is slidably engaged at both ends of the annular cover one. The annular cover one and the annular cover two can be slidably sleeved on the outside of the focusing ring to prevent accidental rotation of the focusing ring.

[0010] The light shield is installed and fixed to one end of the movable cylinder;

[0011] A lens cap is located on the open side of the lens hood, and a connecting post is fixed at the bottom of the lens cap to rotate and engage with the lens hood.

[0012] Furthermore, one end of the focusing ring is provided with an annular notch, and the docking cylinder rotates and abuts against the annular notch.

[0013] Furthermore, the bottom of the light shield is provided with a columnar groove, and one end of the connecting column is fixed with a limiting block that slides and engages with the columnar groove.

[0014] Furthermore, the lens hood has an annular notch at its open end to facilitate the insertion of a lens cap, and a wristband is fixed to the outside of the lens cap.

[0015] Furthermore, one end of the second annular cover is provided with an annular groove that is slidably inserted into the first annular cover, and the outer side of the second annular cover is provided with a through hole that is slidably engaged with the second annular cover.

[0016] Furthermore, one of the annular covers has a ring fixed to its inner side that slides against the movable cylinder, and the other annular cover has an internal thread at one end.

[0017] Furthermore, the outer side of the docking cylinder is fixed with a circular ring that engages with the internal thread, and one end of the docking cylinder is provided with an internal thread.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. By attaching two annular covers to the outside of the movable cylinder, after the user rotates the focusing ring to move the movable cylinder with a lens assembly for focusing, the two annular covers can be slid towards the focusing ring, so that the annular covers are fitted onto the outside of the focusing ring (see reference). Figure 2 At the same time, the two annular covers near the first ring can be screwed onto the first ring, so that the two annular covers can be fixed to the outside of the focus ring through the docking sleeve, which helps to prevent the user from accidentally touching the focus ring and causing an accidental misadjustment of the lens focus.

[0020] 2. An annular cover 1 is slidably engaged between the two annular covers 2. The two annular covers 2 can move in opposite directions to expose the annular cover 1. At this time, the protective assembly consists of two annular covers 2 and annular cover 1. Compared with the protective assembly consisting of two annular covers 2, the length has become longer. This allows the length of the protective area of ​​the protective assembly to be adjusted by sliding the annular cover 2 on the annular cover 1. This ensures that the annular cover 2 can always be screwed and fixed with the annular cover 1 when the focusing ring moves to the left during focusing.

[0021] 3. By creating a cylindrical groove at the bottom of the lens hood, the lens cap rotates and slides into the groove via a connecting post. The lens cap can be pulled out using a wristband and then rotated 180 degrees around the connecting post (see reference). Figure 2 This allows for easy removal of the lens cap when using the lens. Conversely, to remove the lens cap, first rotate it 180 degrees around the connecting post and then push it inside the lens hood (see reference). Figure 1 This design allows you to conveniently cover the lens when not in use. By connecting the lens cap to the lens, it can prevent the lens cap from being forgotten or lost after disassembly, and also saves you from the complicated steps of removing and installing the lens cap after each use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the lens cover in the open state of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the light shield and lens cover in this utility model;

[0025] Figure 4 This is a cross-sectional view of the lens barrel in this utility model;

[0026] Figure 5 This is a schematic diagram of the protective component structure in this utility model.

[0027] In the diagram: 100, lens barrel; 110, docking tube; 111, internal thread one; 112, circular ring one; 120, inner cylinder; 130, focusing ring; 140, movable cylinder; 200, lens assembly; 300, protective assembly; 310, annular cover one; 311, through hole; 320, annular cover two; 321, annular groove; 322, slider; 323, internal thread two; 324, circular ring two; 400, lens hood; 410, columnar groove; 420, annular notch two; 500, lens cap; 510, connecting post; 511, limiting block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1, please refer to Figure 1 - Figure 5In this embodiment of the present invention, a reflective SLR camera lens includes a lens barrel 100. The lens barrel 100 includes a docking tube 110 connected to an external camera. An inner tube 120 is fixedly mounted on one end of the docking tube 110. A focusing ring 130 is rotatably attached to the outer side of the inner tube 120. A movable tube 140 is fixedly connected to one end of the focusing ring 130. The movable tube 140 is screwed into the inner tube 120. Both the docking tube 110 and the movable tube 140 can be detachably mounted and fixed with existing technology. The lens assembly 200 has a protective assembly 300 sleeved on the outside of the movable cylinder 140. The protective assembly 300 includes an annular cover 310, and an annular cover 320 is slidably engaged at both ends of the annular cover 310. One annular cover 310 slides against the movable cylinder 140. A light shield 400 is installed and fixed at one end of the movable cylinder 140. A lens cap 500 is arranged on the open side of the light shield 400. A connecting post 510 is fixed at the bottom of the lens cap 500 and is rotatably engaged with the light shield 400.

[0030] Specifically, by sliding ring cover 310 and ring cover 320 on the outside of the lens barrel 100, after the focusing ring 130 is focused, the ring cover 320 can be slid to make the ring cover 320 and the ring cover 310 fit and protect the outside of the focusing ring 130, effectively preventing the user's finger from accidentally touching the focusing ring 130 and causing a change in focal length. The lens cap 500 is rotated and slidably snapped onto the open end of the lens hood 400 through the connecting post 510, eliminating the need for the traditional independent design of the lens cap 500, effectively preventing the lens cap 500 from being forgotten or lost after disassembly, and eliminating the complicated steps of removing and installing the lens cap 500 after the lens is used, which helps to improve the convenience of using the lens cap 500.

[0031] like Figure 4 As shown, in this embodiment, the focusing ring 130 has an annular notch at one end near the docking cylinder 110. The docking cylinder 110 rotates and comes into contact with the annular notch. When the focusing ring 130 is rotated, the focusing ring 130, along with the movable cylinder 140, rotates to the left outside the inner cylinder 120. At this time, the annular notch gradually separates from the docking cylinder 110. Then, when the focusing ring 130 is rotated in the opposite direction, the focusing ring 130, along with the movable cylinder 140, rotates to the right outside the inner cylinder 120. At this time, the annular notch returns to its original position. Figure 4 The initial position is moved.

[0032] In this embodiment, two lens assemblies 200 are respectively installed and fixed inside the movable cylinder 140 and the docking cylinder 110. When the movable cylinder 140 is moved by rotating the focusing ring 130, the movable cylinder 140 can move one lens assembly 200, thereby adjusting the distance between the two lens assemblies 200 and achieving the effect of adjusting the lens focal length. The lens assembly 200 adopts existing technology components. The specific working principle of the lens assembly 200 and the combination and installation of the lens are not described in detail.

[0033] like Figure 3 As shown, in this embodiment, a columnar groove 410 is provided at the bottom of the light shield 400, and a limiting block 511 is fixed at one end of the connecting post 510 and slidably engaged with the columnar groove 410. The connecting post 510 is slidably connected to the port of the columnar groove 410, and the limiting block 511 can prevent the connecting post 510 from detaching from the light shield 400, so that the lens cover 500 is connected and installed on the light shield 400 through the connecting post 510.

[0034] like Figure 2 As shown, in this embodiment, the open end of the lens hood 400 is provided with an annular notch 420 to facilitate the accommodation of the lens cap 500. After the lens cap 500 is closed into the lens hood 400, the lens cap 500 can be positioned exactly at the position of the annular notch 420. A wristband is fixed to the outside of the lens cap 500, which allows the user to easily install and remove the lens cap 500 by holding it.

[0035] like Figure 5 As shown, in this embodiment, one end of the second annular cover 320 is provided with an annular groove 321 that is slidably inserted into the first annular cover 310. The outer side of the second annular cover 320 is provided with a through hole 311 that is slidably engaged with the second annular cover 320. A slider 322 is fixed to the top of one end of the second annular cover 320. The slider 322 is slidably arranged at the position of the through hole 311, so that the first annular cover 310 can slidably connect the two second annular covers 320 together. It is also possible to extend the length of the protected area of ​​the protective component 300 by sliding the two second annular covers 320 on the first annular cover 310.

[0036] like Figure 4 and Figure 5 As shown, in this embodiment, an annular cover 320 has a ring 324 fixed on its inner side that slides against the movable cylinder 140, and an internal thread 111 is provided at one end of the connecting cylinder 110.

[0037] In this embodiment, the second annular ring 324 is arranged between the second annular cover 320 and the movable cylinder 140, so that there is space between the first annular cover 310 and the second annular cover 320 and the movable cylinder 140. This space can easily accommodate the focusing ring 130. The first internal thread 111 is used to screw the docking cylinder 110 onto the camera. This part is the specific structure of the connection between the docking cylinder 110 and the camera in the prior art. The specific working principle of the connection and installation between the docking cylinder 110 and the camera will not be described in detail.

[0038] like Figure 1 , Figure 4 and Figure 5As shown, in this embodiment, one end of an annular cover 320 is provided with an internal thread 323, and a ring 112 that is screwed into the internal thread 323 is fixed on the outside of the docking cylinder 110. After the annular cover 320 is fitted onto the outside of the focusing ring 130, the annular cover 320 near the ring 112 can be screwed into the ring 112, thereby fixing the annular cover 320 on the outside of the docking cylinder 110.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A reflex SLR camera lens, characterized in that, include: The lens barrel (100) includes a docking tube (110), an inner tube (120) is fixedly installed at one end of the docking tube (110), a focusing ring (130) is rotatably attached to the outer side of the inner tube (120), and a movable tube (140) is fixedly connected to one end of the focusing ring (130) and screwed into the inner tube (120). Rotating the focusing ring (130) in both directions can cause the movable tube (140) to move left and right on the outer side of the inner tube (120). Two lens assemblies (200) are installed and fixed inside the docking cylinder (110) and the movable cylinder (140), respectively. The protective component (300) is slidably sleeved with the movable cylinder (140). The protective component (300) includes an annular cover one (310), and an annular cover two (320) is slidably engaged at both ends of the annular cover one (310). The annular cover one (310) and the annular cover two (320) can be slidably sleeved on the outside of the focusing ring (130) to prevent accidental rotation of the focusing ring (130). A light shield (400) is installed and fixed to one end of a movable cylinder (140); A lens cap (500) is arranged on the open side of the lens hood (400), and a connecting post (510) is fixed at the bottom of the lens cap (500) to be rotatably engaged with the lens hood (400).

2. The reflective SLR camera lens according to claim 1, characterized in that, One end of the focusing ring (130) has an annular notch, and the docking cylinder (110) rotates and abuts against the annular notch.

3. The reflective SLR camera lens according to claim 1, characterized in that, The bottom of the light shield (400) is provided with a columnar slot (410), and one end of the connecting column (510) is fixed with a limiting block (511) that slides and engages with the columnar slot (410).

4. The reflective SLR camera lens according to claim 3, characterized in that, The open end of the lens hood (400) is provided with an annular notch (420) to facilitate the accommodation of the lens cap (500), and a wristband is fixed to the outside of the lens cap (500).

5. The reflective SLR camera lens according to claim 1, characterized in that, One end of the second annular cover (320) is provided with an annular groove (321) that is slidably inserted into the first annular cover (310), and the outer side of the second annular cover (320) is provided with a through hole (311) that is slidably engaged with the second annular cover (320).

6. The reflective SLR camera lens according to claim 5, characterized in that, One of the annular covers (320) has a ring (324) fixed on its inner side that slides against the movable cylinder (140), and the other annular cover (320) has an internal thread (323) at one end.

7. The reflective SLR camera lens according to claim 6, characterized in that, The outer side of the docking cylinder (110) is fixed with a ring (112) that is screwed into the internal thread (323), and one end of the docking cylinder (110) is provided with an internal thread (111).

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