M42 lens adapter ring with anti-loose quick adjustment mechanism

Abstract

The utility model discloses a kind of M42 lens adapter ring with anti-loose quick adjustment mechanism, including mounting seat, M42 lens front mouth and lens bayonet, lens locking structure is arranged between M42 lens front mouth and mounting seat, lens locking structure includes front mouth lock ring, anti-loose compression ring and elastic rubber ring, one end of front mouth lock ring is connected with mounting seat, the other end of front mouth lock ring is connected with M42 lens front mouth by anti-loose compression ring and elastic rubber ring, and anti-loose compression ring outer side protrudes from M42 lens front mouth outer side, the inner wall of this end of mounting seat facing M42 lens front mouth is also equipped with sliding aperture thimble baffle.This utility model's adapter ring, the installation of lens is fixed, can make anti-loose compression ring contact lens first, make the connection stability of lens and front mouth more stable, avoid the problem that lens accidentally loosens;When needing to adjust lens directly above direction, just need to unfasten front mouth lock ring from mounting seat, release the M42 lens front mouth that is pressed tightly, just can adjust lens directly above direction, and operation is quick and convenient.

Description

Technical Field

[0001] This utility model relates to the field of camera auxiliary device technology, specifically to an M42 lens adapter ring with an anti-loosening quick-adjustment mechanism. Background Technology

[0002] Currently, M42 screw mount lenses are also among the lenses frequently used by photography enthusiasts. Some M42 screw mount lenses are equipped with an aperture pin. When using them, the adapter ring must hold this pin in place in order to adjust the lens aperture. Therefore, the adapter rings used for them are generally equipped with an M42 lens mount baffle, which is a ring baffle used to hold the aperture pin in place.

[0003] To enable adapters to be compatible with both traditional M42 screw-mount lenses without an aperture lever and those with an aperture lever, a sliding baffle is incorporated into the adapter. For example, an adapter for M42 screw-mount lenses, disclosed in CN222420778U, utilizes a sliding baffle design. During lens installation, the sliding baffle, along with a stop block and an aperture pin, rotates together with the M42 screw-mount lens. This not only allows the sliding baffle to hold the aperture pin in place but also avoids interference from the aperture lever. This allows the adapter to be used with both M42 screw-mount lenses with and without an aperture lever, improving its applicability and effectiveness while also facilitating installation.

[0004] However, when installing M42 lens adapters, including those mentioned above, wear can easily occur between the adapter and the screw ring. Additionally, over-tightening the M42 lens and mounting base can damage the thread structure, leading to problems such as lens misalignment (pointing the lens straight up) and lens loosening from the adapter, affecting performance. While some adapters allow adjustment of the M42 lens front edge when lens misalignment occurs, additional tools are needed to disassemble and adjust the lens and screw ring, making the process cumbersome. Utility Model Content

[0005] The purpose of this invention is to provide an M42 lens adapter ring with an anti-loosening quick-adjustment mechanism to solve the problems in the prior art where the lens is prone to tilting at the top and the lens is loose from the adapter ring, requiring additional auxiliary tools to adjust the front of the M42 lens, resulting in inconvenience in operation and affecting the performance.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: An M42 lens adapter ring with an anti-loosening quick-adjustment mechanism includes a mounting base. One side of the mounting base is provided with an M42 lens front opening, and the other side is provided with a lens mount. A lens locking structure is provided between the M42 lens front opening and the mounting base. The lens locking structure includes a front opening locking ring and an anti-loosening pressure ring. One end of the front opening locking ring is connected to the mounting base, and the other end of the front opening locking ring is connected to the M42 lens front opening through the anti-loosening pressure ring and an elastic rubber ring. The outer side of the anti-loosening pressure ring protrudes from the outer side of the M42 lens front opening. A sliding aperture pin baffle is also fitted on the inner wall of the end of the mounting base facing the M42 lens front opening.

[0007] Preferably, the M42 lens front opening has an integrally formed connecting platform and a boss, with a mounting groove formed between the connecting platform and the boss. The connecting platform is connected to the front opening locking ring, the elastic rubber ring is embedded in the mounting groove, and the anti-loosening ring is fitted on the outer wall of the boss, with the outer side of the anti-loosening ring protruding from the outer side of the boss.

[0008] Preferably, the anti-loosening pressure ring has a raised locking platform, and the inner wall of the front locking ring has a corresponding locking groove to lock the locking platform.

[0009] Preferably, the mounting base has a locking pin elastically provided on the outer wall of the end facing the front locking ring, and the inner wall of the front locking ring has a locking groove, and the front locking ring is threadedly rotated to connect with the mounting base.

[0010] Preferably, the aforementioned sliding aperture pin baffle is provided with an aperture pin stop block, and the aperture pin stop block is provided with a stop post that abuts against the aperture pin on the M42 lens.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The adapter ring of this utility model has a simple structure. The lens locking structure design facilitates the installation and fixation of the lens. The design of the anti-loosening pressure ring and the elastic rubber ring allows the anti-loosening pressure ring to contact the lens first and always has a reverse elastic force on the lens, making the connection between the lens and the front opening more stable, avoiding the problem of the lens accidentally loosening, and improving the safety of use. (2) When the lens is tilted and needs to be adjusted, simply loosen the front locking ring from the mounting base and release the M42 lens front opening that has been pressed. The direction of the lens can be adjusted without any additional auxiliary tools. The operation is quick and convenient and can improve the performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the front opening of the M42 lens in this utility model; Figure 5 This is a schematic diagram of the front locking ring in this utility model.

[0013] In the diagram: 1-Mounting base; 2-M42 lens front mount; 3-Lens mount; 4-Front mount locking ring; 5-Anti-loosening pressure ring; 6-Elastic rubber ring; 7-Sliding aperture pin stop; 8-Locking pin; 201-Connecting platform; 202-Lead; 203-Mounting groove; 401-Slot; 402-Locking groove; 501-Slotting platform; 701-Aperture pin stop; 702-Stop. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0015] like Figure 1-5 As shown, an M42 lens adapter ring with an anti-loosening quick-adjustment mechanism includes a mounting base 1. One side of the mounting base 1 is provided with an M42 lens front opening 2, and the other side is provided with a lens mount 3. A lens locking structure is provided between the M42 lens front opening 2 and the mounting base 1. The lens locking structure includes a front opening locking ring 4 and an anti-loosening pressure ring 5. One end of the front opening locking ring 4 is connected to the mounting base 1, and the other end of the front opening locking ring 4 is connected to the M42 lens front opening 2 through the anti-loosening pressure ring 5 and an elastic rubber ring 6. The outer side of the anti-loosening pressure ring 5 protrudes from the outer side of the M42 lens front opening 2. A sliding aperture pin baffle 7 is also fitted on the inner wall of the end of the mounting base 1 facing the M42 lens front opening 2.

[0016] In use, first place the elastic rubber ring on the outer wall of the front opening of the M42 lens, then place the front opening of the M42 lens inside the front opening locking ring 4, and tighten the connection with the anti-loosening pressure ring 5. Then screw the front opening locking ring 4 onto the mounting base, and then install the M42 lens from the position of the front opening of the M42 lens. After installation, tighten the front opening locking ring 4.

[0017] When the lens is tilted at the top, simply unlock the front locking ring 4 from the mounting base 1 to release the pressed M42 lens front opening 2, and the lens can be adjusted to the top direction without any additional tools. This convenient operation can improve the performance.

[0018] The adapter ring of this utility model has a simple structure. The lens locking structure design facilitates the installation and fixation of the lens. The design of the anti-loosening pressure ring 5 and the elastic rubber ring 6 allows the anti-loosening pressure ring 5 to contact the lens first and always have a reverse elastic force on the lens, making the connection between the lens and the front opening more stable, avoiding the problem of the lens accidentally loosening, and improving the safety of use.

[0019] Specifically, a connecting platform 201 and a boss 202 are integrally formed on the front opening 2 of the M42 lens. A mounting groove 203 is formed between the connecting platform 201 and the boss 202. The connecting platform 201 is connected to the front opening locking ring 4. An elastic rubber ring 6 is embedded in the mounting groove 203. An anti-loosening pressure ring 5 is fitted on the outer wall of the boss 202, and the outer side of the anti-loosening pressure ring 5 protrudes from the outer side of the boss 202. The above-mentioned structural design of the front opening 2 of the M42 lens facilitates the installation of the elastic rubber ring 6 and the anti-loosening pressure ring 5, and can improve the tightness of the accessory installation. The positional design between the anti-loosening pressure ring 5 and the boss 202 allows the anti-loosening pressure ring to have a reverse elastic force on the lens, preventing the risk of accidental loosening of the lens.

[0020] Specifically, the anti-loosening pressure ring 5 has a raised retaining plate 501, and the inner wall of the front locking ring 4 has a corresponding retaining groove 401 to engage the retaining plate 501. This design facilitates the installation of the anti-loosening pressure ring 5, improves the stability of the connection between the anti-loosening pressure ring 5 and the front locking ring 4, and reduces the risk of the anti-loosening pressure ring 5 falling off.

[0021] Specifically, a locking pin 8 is elastically provided on the outer wall of the mounting base 1 facing the front locking ring 4, and a locking groove 402 is provided on the inner wall of the front locking ring 4. The front locking ring 4 and the mounting base 1 are connected by a threaded rotation. The above design facilitates the locking connection between the front locking ring 4 and the mounting base 1. At the same time, the two ends of the groove wall of the locking groove 402 can be designed with arc-shaped slopes, and the locking pin 8 is designed at an angle relative to the mounting base, which facilitates the locking pin 8 entering the locking groove 402 and improves the ease of operation.

[0022] Specifically, the sliding aperture pin baffle 7 is equipped with an aperture pin stop 701, and the aperture pin stop 701 is equipped with a stop post 702 that abuts against the aperture pin on the M42 lens. This design facilitates the installation of the sliding aperture pin baffle 7. During lens installation, the end of the aperture pin on the lens abuts against the aperture pin baffle 701, and the side wall of the aperture pin abuts against the stop post 702. Thus, when the lens is rotated towards the mounting base 1, the aperture pin applies force to the stop post 702, thereby causing the sliding aperture pin baffle 7 to rotate together. The end of the aperture pin applies force to the baffle, causing the aperture pin to retract inwards towards the lens until the lens is fully installed and the baffle completely abuts against the aperture pin. Finally, the front locking ring 4 is tightened. The operation is convenient and the connection is stable.

[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An M42 lens adapter ring with an anti-loosening and quick-adjustment mechanism, comprising a mounting base, wherein one side of the mounting base is provided with an M42 lens front mount and the other side is provided with a lens mount, characterized in that: A lens locking structure is provided between the front opening of the M42 lens and the mounting base. The lens locking structure includes a front opening locking ring, an anti-loosening pressure ring, and an elastic rubber ring. One end of the front opening locking ring is connected to the mounting base, and the other end of the front opening locking ring is connected to the front opening of the M42 lens through the anti-loosening pressure ring and the elastic rubber ring. The outer side of the anti-loosening pressure ring protrudes from the outer side of the front opening of the M42 lens. A sliding aperture pin baffle is also fitted on the inner wall of the end of the mounting base facing the front opening of the M42 lens.

2. The M42 lens adapter ring with anti-loosening quick-adjustment mechanism according to claim 1, characterized in that: The M42 lens has an integrally formed connecting platform and a boss on the front opening, and a mounting groove is formed between the connecting platform and the boss. The connecting platform is connected to the front opening locking ring, the elastic rubber ring is embedded in the mounting groove, and the anti-loosening pressure ring is sleeved on the outer wall of the boss, with the outer side of the anti-loosening pressure ring protruding from the outer side of the boss.

3. The M42 lens adapter ring with anti-loosening quick-adjustment mechanism according to claim 2, characterized in that: The anti-loosening pressure ring has a raised locking platform, and the inner wall of the front locking ring has a corresponding locking groove to lock the locking platform.

4. An M42 lens adapter ring with an anti-loosening quick-adjustment mechanism according to any one of claims 1-3, characterized in that: A locking pin is elastically provided on the outer wall of the end of the mounting base facing the front locking ring, and a locking groove is provided on the inner wall of the front locking ring. The front locking ring is threadedly rotated to connect with the mounting base.

5. The M42 lens adapter ring with anti-loosening quick-adjustment mechanism according to claim 1, characterized in that: The sliding aperture pin baffle is provided with an aperture pin stop block, and the aperture pin stop block is provided with a stop post that abuts against the aperture pin on the M42 lens.

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