Light shield assembly and lens mechanism

Abstract

The utility model provides a light shield assembly and a lens mechanism. The light shield assembly comprises a light shield main cylinder, a pressing ring and a limiting ring located between the light shield main cylinder and the pressing ring. Wherein the pressing ring is a hard metal piece, and the pressing ring is fixedly connected with the light shield main cylinder; the limiting ring is provided with a limiting groove used for limiting the bayonet of the lens, and the limiting ring is a hard plastic part. The limiting ring is installed on the light shield main cylinder, and then the pressing ring is fixed on the light shield main cylinder, so that the limiting ring is fixed on the light shield main cylinder, the lens is in butt joint with the light shield assembly, the bayonet is clamped into the limiting groove, and therefore fixed connection of the light shield assembly and the lens is achieved. Meanwhile, due to the fact that the pressing ring is a hard metal piece, the strength and the precision of connection between the light shield and the lens are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lens mechanisms, and more particularly to a light shield assembly and a lens mechanism. Background Art

[0002] With the rapid development of short videos in recent years, the demand for outdoor photography has gradually increased. Compared to indoor photography, outdoor photography often has unexpected stray light entering the imaging system. This stray light can cause halos in the image, significantly reducing image clarity and color reproduction.

[0003] In situations where light is difficult to control, the lens hood effectively blocks stray light, reducing the glare caused by stray light outside the shooting area. Therefore, the lens hood plays a vital role in the optical imaging system.

[0004] Currently, the common installation methods for lens hoods are threaded installation, magnetic installation and bayonet installation.

[0005] Among them, the threaded installation requires the user to turn multiple circles before it can be assembled into place. Compared with other methods, the threaded installation method is less convenient and more cumbersome.

[0006] The magnetic installation method is the most convenient and simple, but compared with the other two methods, it uses magnetic force rather than mechanical contact and extrusion to fix it. The magnetic method is prone to shaking and misalignment.

[0007] Bayonet mounting is relatively convenient, typically requiring only a 1 / 3 to 1 / 2 turn to complete installation. Internal stoppers ensure the hood maintains its proper position relative to the lens after installation. Bayonet mounting structures currently utilize metal and injection-molded components. While metal components offer high structural precision, repeated use with lenses poses a risk of scratching the contact surface. Furthermore, injection-molded hoods are relatively inaccurate and expensive. Utility Model Content

[0008] The purpose of the utility model is to provide a light shield assembly and a lens mechanism to solve the technical problem in the prior art that the bayonet-type mounting structure of the light shield is difficult to achieve both connection accuracy and protection performance.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] In a first aspect, a light shield assembly is provided, comprising:

[0011] A lens hood main tube, a pressure ring, and a limit ring located between the lens hood main tube and the pressure ring; wherein the pressure ring is a hard metal part, and the pressure ring is fixedly connected to the lens hood main tube; the limit ring is provided with a limit groove for limiting the bayonet of the lens, and the limit ring is a hard plastic part.

[0012] By adopting the above technical solution, the limit ring of the hard plastic part can reduce the possibility of scratching the lens, and the pressure ring of the hard metal part can ensure the connection accuracy between the lens hood assembly and the lens.

[0013] In one embodiment, the main tube of the light shield is provided with a matte step and a light shield screw thread opposite to the matte step, and the pressure ring is provided with a pressure ring screw thread connected to the light shield screw thread, and the pressure ring fixes the limit ring on the main tube of the light shield when the pressure ring screw thread is tightly engaged with the light shield screw thread.

[0014] By adopting the above technical solution, the pressure ring and the light shield are threadedly connected, and the two are easy to connect and have high reliability.

[0015] In one embodiment, the main tube of the light shield is also provided with a receiving groove for accommodating the limit ring, the groove wall of the receiving groove is provided with the light shield screw thread, and the pressure ring fixes the limit ring in the receiving groove when the pressure ring screw thread is tightly engaged with the light shield screw thread.

[0016] By adopting the above technical solution, the limit ring is accommodated in the receiving groove of the main tube of the lens hood, which is beneficial to improving the stability of the limit ring when it is fixed, and further improving the accuracy when it is connected to the lens.

[0017] In one embodiment, the main tube of the sunshade is further provided with a positioning pin, and the limiting ring is provided with a positioning groove that cooperates with the positioning pin. The limiting ring is fixed relative to the main tube of the sunshade when the positioning pin is inserted into the positioning groove.

[0018] By adopting the above technical solution, the accuracy of the positioning of the limit ring and the main tube of the light shield is improved, which is beneficial to the connection between the two.

[0019] In one embodiment, a plurality of the limiting grooves and entry grooves connected one-to-one with the limiting grooves are provided on the circumference of the limiting ring, and the entry grooves and the limiting grooves are staggered in the axial direction of the limiting ring.

[0020] By adopting the above technical solution, the stability of the connection between the lens and the lens hood assembly is improved.

[0021] In one embodiment, a limiting column is provided in the limiting groove for abutting against the bayonet of the lens.

[0022] By adopting the above technical solution, the lens mount can be installed in place more easily.

[0023] In one embodiment, a feedback ear position structure is provided in the limiting groove, and the distance between the feedback ear position structure and the limiting column matches the size of the lens mount, so that the mount can be just accommodated between the feedback ear position structure and the limiting column.

[0024] By adopting the above technical solution, it is convenient for assemblers to obtain the status of whether the bayonet is assembled in place.

[0025] In one embodiment, the feedback ear position structure is an elastic structure, and the feedback ear position structure applies a force on the bayonet mount of the lens when the bayonet mount is misaligned with the limiting groove.

[0026] In one embodiment, at least one of the feedback ear structures cancels the force applied to the bayonet of the lens when the bayonet is aligned with the limiting groove, and at least one of the feedback ear structures is used to contact the lens to provide a pre-tightening force.

[0027] By adopting the above technical solution, it is convenient for assemblers to obtain the assembly status of the bayonet.

[0028] In a second aspect, a lens mechanism is provided, comprising a lens and the above-mentioned lens hood assembly, wherein the lens hood assembly is assembled on the lens.

[0029] By adopting the above technical solution, on the basis of having the advantages of the hood assembly of the above embodiment, the lens mechanism of this embodiment also has the advantages of convenient operation of assembling the hood assembly and good protection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a three-dimensional structural diagram of the light shield assembly provided by an embodiment of the utility model.

[0032] Figure 2 It is an exploded view of the light shield assembly provided by an embodiment of the present utility model.

[0033] Figure 3 It is a cross-sectional view of a light shield assembly provided by an embodiment of the present utility model.

[0034] Figure 4It is a three-dimensional structural diagram of the limit ring provided in an embodiment of the utility model.

[0035] The reference numerals in the figures are:

[0036] 100. Light hood assembly;

[0037] 1. Lens hood main tube; 2. Lens; 3. Pressing ring; 4. Limiting ring;

[0038] 11. Matting step; 12. Shade hood screw thread; 13. Accommodation groove; 14. Positioning pin; 31. Pressure ring screw thread; 41. Limiting groove; 42. Positioning groove; 43. Entry groove; 44. Limiting column; 45. Feedback ear position structure. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or the number of technical features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. The following is a more detailed description of the specific implementation of this utility model in conjunction with specific embodiments:

[0043] like Figures 1 to 3As shown, the present invention provides a lens hood assembly 100 for intercepting stray light when light is uncontrollable, thereby reducing glare interference from stray light outside the shooting area on the lens. The lens hood assembly 100 provided in this embodiment has the advantage of being easy to assemble and disassemble, while reducing the possibility of the lens being scratched by the lens hood assembly 100, thereby improving the lens's protective performance. The following is an explanation of the specific implementation method:

[0044] The light shield assembly 100 of this embodiment includes:

[0045] The lens hood main tube 1, the pressure ring 3 and the limit ring 4 located between the lens hood main tube 1 and the pressure ring 3; wherein, the pressure ring 3 is a hard metal part, and the pressure ring 3 is fixedly connected to the lens hood main tube 1; the limit ring 4 is provided with a limit groove 41 for limiting the bayonet 21 of the lens 2, and the limit ring 4 is a hard plastic part.

[0046] Here, it can be understood that the main tube 1 of the light shield refers to a cylindrical member for achieving the light shielding function, and the shape of the main tube 1 of the light shield is cylindrical;

[0047] The pressing ring 3 is a member used to press the limiting ring 4 onto the main tube 1 of the lens hood. The pressing ring 3 is fixedly connected to the main tube 1 of the lens hood, and its connection method includes but is not limited to a threaded connection or a bayonet connection. The pressing ring 3 is a hard metal part, that is, the pressing ring 3 is made of a hard metal material. This facilitates a tight connection with the bayonet 21 of the lens 2, which greatly increases the strength and precision of the pressing ring 3.

[0048] Please also refer to Figure 4 The limit ring 4 refers to a component used to connect with the bayonet 21 of the lens 2; the limit ring 4 is arranged between the lens hood main tube 1 and the pressure ring 3, that is, when the pressure ring 3 is fixedly connected to the lens hood main tube 1, the pressure ring 3 is fixed to the lens hood main tube 1; the limit ring 4 is provided with a limit groove 41, and the limit groove 41 is used to limit the bayonet 21 of the lens 2. Specifically, the bayonet 21 is used to be clamped into the limit groove 41, and the groove wall of the limit groove 41 limits the bayonet 21 to fixedly connect the lens 2 and the limit ring 4, thereby realizing that the lens hood assembly 100 is fixed on the lens 2; the limit ring 4 is a hard plastic part, that is, the limit ring 4 is made of hard plastic material, that is, the limit ring 4 has certain mechanical strength and elasticity, thus reducing the possibility of the limit ring 4 scratching the lens 2.

[0049] The working principle of the light shield assembly 100 provided in this embodiment is as follows:

[0050] Install the limit ring 4 on the main tube 1 of the lens hood, and then fix the pressure ring 3 on the main tube 1 of the lens hood. In this way, the limit ring 4 is fixed on the main tube 1 of the lens hood, and the lens 2 is docked with the lens hood assembly 100, so that the bayonet 21 is inserted into the limit groove 41, thereby realizing a fixed connection between the lens hood assembly 100 and the lens 2. Since the limit ring 4 is a hard plastic part, the possibility of the lens hood assembly 100 scratching the lens 2 is reduced. At the same time, since the pressure ring 3 is a hard metal part, the reliability of the connection between the lens hood assembly 100 and the lens 2 is ensured.

[0051] By adopting the above technical solution, the pressure ring 3 of the hard metal part ensures the connection accuracy between the lens hood assembly 100 and the lens 2, and the limit ring 4 of the hard plastic part ensures that the possibility of scratching the lens 2 is reduced.

[0052] Here, it can be understood that the pressure ring 3 is a metal structural part, that is, the pressure ring 3 is made of resin material, and the resin material includes but is not limited to polyoxymethylene resin (POM, Polyoxymethylene), which has the characteristics of high strength, high rigidity and good elasticity; the limit ring 4 is a resin structural part, that is, the limit ring 4 is made of metal material, and the metal material includes but is not limited to brass or aluminum-magnesium alloy, which has the advantages of good mechanical strength and light weight.

[0053] By adopting the above technical solution, the materials of the pressure ring 3 and the limiting ring 4 take into account both the connection strength and the protection performance of the light shield assembly 100.

[0054] Please refer again Figure 2 In one embodiment, the main tube 1 of the light shield is provided with a matte step 11 and a light shield screw thread 12 opposite to the matte step 11, and the pressure ring 3 is provided with a pressure ring screw thread 31 connected to the light shield screw thread 12. When the pressure ring screw thread 31 is tightly fitted with the light shield screw thread 12, the pressure ring 3 fixes the limit ring 4 on the main tube 1 of the light shield.

[0055] Here, it can be understood that the extinction step 11 refers to a step structure used to weaken the influence of light on the lens 2; the lens hood screw 12 refers to a structure used to be threadedly connected to the pressure ring screw 31; the lens hood screw 12 is arranged opposite to the extinction step 11 to avoid interference between the extinction step 11 and the lens hood screw 12, which may affect the extinction effect; the pressure ring 3 is provided with a pressure ring screw 31, which is used to be threadedly connected to the lens hood screw 12; when the pressure ring screw 31 is tightly fitted with the lens hood screw 12, the pressure ring 3 fixes the limit ring 4 on the lens hood main tube 1.

[0056] By adopting the above technical solution, the pressure ring 3 and the light shield are threadedly connected, and the two are easy to connect and have high reliability.

[0057] In one embodiment, the main tube 1 of the light shield is also provided with a receiving groove 13 for accommodating the limit ring 4, and the groove wall of the receiving groove 13 is provided with a light shield screw 12. The pressure ring 3 fixes the limit ring 4 in the receiving groove 13 when the pressure ring screw 31 is tightly engaged with the light shield screw 12.

[0058] Here, it can be understood that the shape and size of the accommodating groove 13 match the shape and size of the limiting ring 4, so that the limiting ring 4 can be just accommodated in the accommodating groove 13, and the light shield screw thread 12 is arranged on the groove wall of the accommodating groove 13. In this way, the pressure ring 3 fixes the limiting ring 4 in the accommodating groove 13 when the pressure ring screw thread 31 is tightly engaged with the light shield screw thread 12.

[0059] By adopting the above technical solution, the limit ring 4 is accommodated in the receiving groove 13 of the lens hood main tube 1, which is beneficial to improving the stability of the limit ring 4 when it is fixed, and further improving the accuracy when connected to the lens 2.

[0060] Please refer again Figure 3 and Figure 4 In one embodiment, the main tube 1 of the sunshade is further provided with a positioning pin 14, and the limiting ring 4 is provided with a positioning groove 42 that cooperates with the positioning pin 14. The limiting ring 4 is fixed relative to the main tube 1 of the sunshade when the positioning pin 14 is inserted into the positioning groove 42.

[0061] Here, it can be understood that the positioning pin 14 refers to a component used to position the limit ring 4; the positioning pin 14 is arranged at a preset position of the main tube 1 of the light shield, and when the limit ring 4 is inserted into the accommodating groove 13, the positioning groove 42 is aligned with the positioning pin 14. In this way, when the positioning pin 14 is inserted into the positioning groove 42, the limit ring 4 is fixed relative to the main tube 1 of the light shield and fixed at the preset position.

[0062] By adopting the above technical solution, the positioning accuracy of the limit ring 4 and the main tube of the light shield 1 is improved, which is beneficial to the connection between the two.

[0063] In one embodiment, a plurality of limiting grooves 41 and entry grooves 43 connected one-to-one with the limiting grooves 41 are provided on the circumference of the limiting ring 4 , and the entry grooves 43 and the limiting grooves 41 are staggered in the axial direction of the limiting ring 4 .

[0064] Here, it can be understood that the bayonet 21 of the lens 2 is inserted into the accommodating groove 13 along the axial direction of the limit ring 4, and the bayonet 21 is first aligned and inserted into the entry groove 43. After the bayonet 21 is inserted into the entry groove 43, the operator rotates the limit ring 4 around the axis to move the bayonet 21 from the entry groove 43 to the limit groove 41, thereby realizing the limiting of the bayonet 21 by the limit groove 41. At the same time, since the entry groove 43 and the limit groove 41 are staggered in the axial direction of the limit ring 4, the bayonet 21 of the lens 2 is not easy to slide out of the limit groove 41, thereby improving the stability of the connection between the lens 2 and the lens hood assembly 100.

[0065] By adopting the above technical solution, the stability of the connection between the lens 2 and the lens hood assembly 100 is improved.

[0066] In one embodiment, a limiting post 44 is provided in the limiting groove 41 for abutting against the bayonet 21 of the lens 2 .

[0067] Here, it can be understood that the limiting column 44 refers to a columnar component used to limit the bayonet 21 of the lens 2; the limiting column 44 is located at the extreme position of the limiting groove 41, that is, when the bayonet 21 rotates along the circumference of the limiting ring 4 until it abuts against the limiting column 44, the bayonet 21 is installed in place.

[0068] By adopting the above technical solution, the mount 21 of the lens 2 is easily installed in place.

[0069] In one embodiment, a feedback ear position structure 45 is provided in the limiting groove 41, and the distance between the feedback ear position structure 45 and the limiting column 44 matches the size of the bayonet 21 of the lens 2, so that the bayonet 21 can be just accommodated between the feedback ear position structure 45 and the limiting column 44.

[0070] Here, it can be understood that the feedback ear position structure 45 refers to a structure used to feedback whether the bayonet 21 is installed in place; wherein, when the bayonet 21 is installed in place, the feedback ear position structure 45 can feedback the strength or sound of the assembler to prompt the assembly to be in place; specifically, the feedback ear position structure 45 and the limit column 44 are arranged in sequence along the circumference of the limit ring 4, and the distance between the two matches the size of the bayonet 21, so that the bayonet 21 can be just stuck between the two.

[0071] By adopting the above technical solution, it is convenient for assemblers to obtain the status of whether the bayonet 21 is assembled in place.

[0072] In one embodiment, the feedback ear position structure 45 is an elastic structure. When the bayonet 21 is misaligned with the limiting groove 41 , the feedback ear position structure 45 applies a force to the bayonet 21 of the lens 2 .

[0073] Here, it can be understood that the elastic structure refers to a structure that can exert elastic force when deformation occurs; the feedback ear position structure 45 exerts a force on the bayonet 21 of the lens 2 when the bayonet 21 is misaligned with the limiting groove 41, that is, when the bayonet 21 has not yet entered the limiting groove 41, the feedback ear position structure 45 abuts against the bayonet 21. Since the feedback ear position structure 45 is squeezed by the bayonet 21 and deformed, thereby exerting elastic force on the bayonet 21, the assembler can feel the resistance of the feedback ear position structure 45 when driving the bayonet 21 and the limiting ring 4 to rotate relative to each other. , thereby obtaining a situation where the bayonet 21 has not been assembled in place; the feedback ear position structure 45 cancels the force applied to the bayonet 21 of the lens 2 when the bayonet 21 is aligned with the limiting groove 41, that is, when the bayonet 21 completely enters the limiting groove 41 and is located between the feedback ear position structure 45 and the limiting column 44, since the feedback ear position structure 45 no longer abuts against the bayonet 21, the feedback ear position structure 45 no longer applies elastic force on the bayonet 21 and the feedback ear position structure 45 makes a sound, such as a click, when restoring its original shape, reminding the assembler that the bayonet 21 has been assembled in place.

[0074] By adopting the above technical solution, it is convenient for assemblers to obtain the assembly status of the bayonet 21.

[0075] In one embodiment, the feedback ear position structure 45 cancels the force applied to the bayonet 21 of the lens 2 when the bayonet 21 is aligned with the limit groove 41. At least one feedback ear position structure 45 cancels the force applied to the bayonet 21 of the lens 2 when the bayonet 21 is aligned with the limit groove 41. At least one feedback ear position structure 45 is used to contact the lens 2 to provide a pre-tightening force.

[0076] Here, it can be understood that this embodiment can be provided with three feedback ear position structures 45, wherein two of the three feedback ear position structures 45 can cancel the force, and at least one feedback ear position structure 45 is in contact with the lens 2 to provide a pre-tightening force to reduce the shaking between the two.

[0077] In a second aspect, a lens mechanism is provided, including a lens 2 and the above-mentioned lens hood assembly 100 , wherein the lens hood assembly is assembled on the lens 2 .

[0078] By adopting the above technical solution, on the basis of having the advantages of the hood assembly 100 of the above embodiment, the lens mechanism of this embodiment also has the advantages of convenient operation of assembling the hood assembly 100 and good protection performance.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sunshade assembly, characterized in that: include: A lens hood main tube, a pressure ring, and a limit ring located between the lens hood main tube and the pressure ring; wherein the pressure ring is a hard metal part, and the pressure ring is fixedly connected to the lens hood main tube; the limit ring is provided with a limit groove for limiting the bayonet of the lens, and the limit ring is a hard plastic part.

2. The light shield assembly according to claim 1, wherein: The main tube of the light shield is provided with a matting step and a light shield screw thread opposite to the matting step, and the pressure ring is provided with a pressure ring screw thread connected to the light shield screw thread. The pressure ring fixes the limit ring on the main tube of the light shield when the pressure ring screw thread is tightly engaged with the light shield screw thread.

3. The light shield assembly according to claim 1, wherein: The main tube of the light shield is also provided with a receiving groove for accommodating the limiting ring, the groove wall of the receiving groove is provided with light shield screw threads, and the pressure ring fixes the limiting ring in the receiving groove when the pressure ring screw threads are tightly matched with the light shield screw threads.

4. The light shield assembly according to claim 1, wherein: The main tube of the light shield is further provided with a positioning pin, and the limiting ring is provided with a positioning groove that cooperates with the positioning pin. The limiting ring is fixed relative to the main tube of the light shield when the positioning pin is inserted into the positioning groove.

5. The sunshade assembly according to any one of claims 1 to 4, wherein: A plurality of the limiting grooves and entry grooves connected one-to-one with the limiting grooves are provided on the circumference of the limiting ring, and the entry grooves and the limiting grooves are staggered in the axial direction of the limiting ring.

6. The light shield assembly according to claim 5, wherein: A limiting column is provided in the limiting groove for abutting against the bayonet of the lens.

7. The light shield assembly according to claim 6, wherein: A feedback ear position structure is provided in the limiting groove, and the distance between the feedback ear position structure and the limiting column matches the size of the lens mount, so that the mount can be just accommodated between the feedback ear position structure and the limiting column.

8. The light shield assembly according to claim 7, wherein: The feedback ear position structure is an elastic structure, and the feedback ear position structure applies a force to the bayonet mount of the lens when the bayonet mount and the limiting groove are misaligned.

9. The light shield assembly according to claim 8, wherein: At least one of the feedback ear structures cancels the force applied to the bayonet of the lens when the bayonet is aligned with the limiting groove, and at least one of the feedback ear structures is used to contact the lens to provide a pre-tightening force.

10. A lens mechanism, characterized in that: The invention comprises a lens and a lens hood assembly according to any one of claims 1 to 9, wherein the lens hood assembly is assembled on the lens.

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