Optical focusing device

Abstract

The utility model discloses an optical focusing device, including focusing member, focusing member includes first cylinder and second cylinder, is equipped with first guide portion and first sliding portion on the first cylinder, is equipped with second guide portion and second sliding portion on the second cylinder, the adjusting assembly includes adjusting sleeve and guide piece, and the first end of adjusting sleeve has third guide portion, and third guide portion and first guide portion rotate and cooperate, the second end of adjusting sleeve has fourth guide portion, and fourth guide portion and second guide portion rotate and cooperate, and guide piece is connected with adjusting sleeve, and the third sliding portion on guide piece and first sliding portion axial sliding cooperation, and the fourth sliding portion on guide piece and second sliding portion axial sliding cooperation, in order to guide first cylinder and second cylinder to be close to each other or each other to move away when adjusting sleeve rotates. Its first cylinder and second cylinder are under the control of guide piece, when adjusting sleeve rotates, can only along the axial smooth sliding, reduces the probability of shaking, and installation is convenient, and maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the field of film and television equipment, and in particular to an optical focusing device. Background Technology

[0002] In film, television, and advertising video shooting scenarios, lighting is a crucial element in shaping the texture and atmosphere of the image. Therefore, optical accessories are usually installed on the light-emitting side of the light fixture. Common accessories include focusing tubes with built-in Fresnel lenses and condenser lenses. The focusing tube adjusts the light output effect to meet the diverse requirements of light intensity, angle, and range in different shooting scenarios.

[0003] Most focusing tubes on the market currently use a telescopic rod to drive the extension and retraction of the tube body. In actual use, the connecting rod inside the telescopic rod is prone to vibration due to loose connection points and uneven force during transmission, affecting the stable positioning of the focusing tube and resulting in inaccurate lighting position. In addition, the installation of the telescopic rod and connecting rod requires consideration of factors such as connection method and force balance, making the installation process relatively complex. When a malfunction occurs, repair and debugging are also difficult, which not only increases equipment maintenance costs but may also delay the shooting schedule. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides an optical focusing device, the entire adjustment component of which has a simple and stable structure, is easy to install, makes the focusing component more stable during the extension and retraction process, and makes subsequent maintenance more convenient.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] An optical focusing device, comprising:

[0007] A focusing component, comprising a first cylindrical body and a second cylindrical body, wherein the first cylindrical body is provided with a first sliding part and a first guiding part, and the second cylindrical body is provided with a second sliding part and a second guiding part;

[0008] An adjustment assembly includes an adjustment sleeve and a guide member. The adjustment sleeve has a first end and a second end disposed opposite to each other. The first end has a third guide portion, which is rotatably engaged with the first guide portion. The second end has a fourth guide portion, which is rotatably engaged with the second guide portion.

[0009] The guide is connected to the adjusting sleeve; the guide is provided with a third sliding part and a fourth sliding part, the third sliding part is axially slidingly engaged with the first sliding part, and the fourth sliding part is axially slidingly engaged with the second sliding part.

[0010] Furthermore, the guide includes a guide block, which is installed inside the adjusting sleeve; the guide block has a first side and a second side that are opposite to each other, a third sliding part is disposed on the first side, and a fourth sliding part is disposed on the second side; the third sliding part and the fourth sliding part are offset from each other in the rotation direction of the adjusting sleeve;

[0011] The first cylinder and the second cylinder are used to move closer to each other along the axial direction of the adjusting sleeve to retract into the adjusting sleeve, or to move further away from each other and extend out of the adjusting sleeve when the adjusting sleeve rotates.

[0012] Furthermore, the first sliding part is provided with a first limiting hole, and a first limiting post passes through the first limiting hole. The guide block is provided with a first limiting groove, and the first limiting groove is provided on the third sliding part; the first limiting post passes through the first limiting groove.

[0013] Furthermore, the second sliding part is provided with a second limiting hole, and a second limiting post passes through the second limiting hole. The guide block is provided with a second limiting groove, and the second limiting groove is provided on the fourth sliding part; the second limiting post passes through the second limiting groove.

[0014] Furthermore, the adjusting sleeve is also provided with a connecting groove, which extends circumferentially along the adjusting sleeve; the bottom of the guide block is also provided with a connecting arm, which is engaged with the connecting groove.

[0015] Furthermore, the adjusting sleeve has a bottom connecting ring and a mounting ring, the mounting ring being detachably connected to the connecting ring; the connecting ring has a connecting notch, the connecting arm extends into the connecting notch, and the mounting ring is used to connect with the connecting ring after the connecting arm extends into the connecting notch, and abuts against the bottom end of the connecting arm, so that the bottom of the adjusting sleeve forms the connecting groove.

[0016] Furthermore, the bottom of the adjusting sleeve is provided with a plurality of first through holes, which are distributed at intervals along the circumference of the adjusting sleeve. The connecting ring is provided with a plurality of second through holes, and the mounting ring is provided with a plurality of third through holes. The plurality of first through holes, the plurality of second through holes, and the plurality of third through holes are arranged in a one-to-one correspondence and are used for connecting the connecting parts.

[0017] Furthermore, the first guide portion is a first threaded segment disposed on the outer periphery of the first cylinder, and the second guide portion is a second threaded segment disposed on the outer periphery of the second cylinder; the second threaded segment has the opposite rotation direction to the first threaded segment;

[0018] The third guide portion is a third threaded segment provided on the first end, and the third threaded segment is helically engaged with the first threaded segment; the fourth guide portion is a fourth threaded segment provided on the second end, and the fourth threaded segment is helically engaged with the second threaded segment; the direction of rotation of the fourth threaded segment is opposite to that of the third threaded segment.

[0019] Furthermore, a limiting ring is provided at the top of the first cylinder, which extends circumferentially along the first cylinder and is used to abut against the periphery of the adjusting sleeve when the first cylinder moves close to the second cylinder.

[0020] Furthermore, the guide is provided in multiple forms, and the multiple guides are distributed at intervals along the circumference of the adjusting sleeve; the first cylinder is provided with multiple first sliding parts, and the multiple first sliding parts are slidably engaged with the multiple third sliding parts respectively; the second cylinder is provided with multiple second sliding parts, and the multiple second sliding parts are slidably engaged with the multiple fourth sliding parts.

[0021] In summary, the optical focusing device provided by this utility model has the following technical effects:

[0022] The first guide portion on the first cylinder rotates in conjunction with the third guide portion on the adjusting sleeve, and the second guide portion on the second cylinder rotates in conjunction with the fourth guide portion on the adjusting sleeve. Simultaneously, the first sliding portion of the first cylinder and the second sliding portion of the second cylinder form an axial sliding constraint relationship with the third and fourth sliding portions on the guides. Thus, when the adjusting sleeve rotates, causing the first and second cylinders to move closer or further apart, the restraint of the third and fourth sliding portions ensures that the first and second cylinders can only slide smoothly along the axial direction, maintaining a stable motion trajectory. This effectively reduces the radial sway and offset that may occur during the movement of the first and second cylinders, thereby improving the stability and reliability of the entire focusing device.

[0023] Furthermore, during installation, simply connect the first guide part and the first sliding part of the first cylinder to the third guide part and the third sliding part of the adjusting sleeve, respectively, and perform the same operation on the corresponding parts of the second cylinder to complete the assembly. No complicated debugging or calibration process is required, which greatly reduces the installation difficulty and time cost, and makes subsequent maintenance more convenient. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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.

[0025] Figure 1 This is a schematic diagram of one usage state of the present invention;

[0026] Figure 2 This is a schematic diagram of another usage state of the present invention;

[0027] Figure 3 This is an exploded view of the present invention;

[0028] Figure 4 This is a schematic diagram from another perspective of the present invention;

[0029] Figure 5 This is an exploded view of the adjusting sleeve of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the guide component of this utility model;

[0031] The meanings of the reference numerals in the attached figures are as follows:

[0032] 10. First cylinder; 11. First sliding part; 111. First limiting hole; 12. First guide part; 13. Limiting ring; 20. Second cylinder; 21. Second sliding part; 211. Second limiting hole; 22. Second guide part; 30. Adjusting sleeve; 31. Third guide part; 32. Fourth guide part; 33. Connecting groove; 34. Connecting ring; 341. Connecting notch; 342. Second through hole; 35. Mounting ring; 351. Third through hole; 36. First through hole; 40. Guide; 41. Third sliding part; 42. Fourth sliding part; 43. Guide block; 431. First limiting groove; 432. Second limiting groove; 44. Connecting arm. Detailed Implementation

[0033] 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.

[0034] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0037] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0038] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0039] See Figures 1 to 6 This utility model discloses an optical focusing device, including a focusing component and an adjustment assembly. The focusing component includes a first cylindrical body 10 and a second cylindrical body 20. The first cylindrical body 10 is provided with a first sliding part 11 and a first guiding part 12, and the second cylindrical body 20 is provided with a second sliding part 21 and a second guiding part 22. The adjustment assembly includes an adjustment sleeve 30 and a guide 40. The adjustment sleeve 30 has a first end and a second end that are disposed opposite to each other. The first end has a third guiding part 31, which is rotatably engaged with the first guiding part 12. The second end has a fourth guiding part 32, which is rotatably engaged with the second guiding part 22.

[0040] In addition, the guide 40 is connected to the adjusting sleeve 30; the guide 40 is provided with a third sliding part 41 and a fourth sliding part 42. The third sliding part 41 is axially slidingly engaged with the first sliding part 11, and the fourth sliding part 42 is axially slidingly engaged with the second sliding part 21, so as to guide the first cylinder 10 and the second cylinder 20 to move closer to each other or further away from each other when the adjusting sleeve 30 rotates.

[0041] Based on the above structure, taking the first end as the top of the adjusting sleeve 30 and the second end as the bottom of the adjusting sleeve 30 as an example, specifically, the first guide part 12 can be an external thread provided on the first cylinder 10, and the third guide part 31 is an internal thread provided on the first end that matches the first guide part 12; similarly, the second guide part 22 is an external thread provided on the second cylinder 20, and the fourth guide part 32 is an internal thread provided on the second end that matches the second guide part 22. Furthermore, the external threads on the first cylinder 10 and the second cylinder 20 must have opposite directions of rotation. Thus, when the adjusting sleeve 30 rotates, because the external thread on the first cylinder 10 engages with the internal thread at the first end of the adjusting sleeve 30, and the external thread on the second cylinder 20 engages with the internal thread at the second end of the adjusting sleeve 30, and the threads rotate in opposite directions, the first cylinder 10 and the second cylinder 20 will move in opposite directions along the axial direction, thereby moving closer or further apart to change the distance between the optical elements (such as lenses) on the first cylinder 10 or the second cylinder 20, achieving focusing.

[0042] Of course, the first guide part 12 can also be a protruding slider on the outer wall of the first cylinder 10, and the third guide part 31 can be a spiral groove on the inner wall of the first end of the adjusting sleeve 30. The spiral direction of the spiral groove is set according to the required movement direction of the first cylinder 10. Similarly, the second guide part 22 is a protruding slider on the outer wall of the second cylinder 20, and the fourth guide part 32 is a spiral groove on the inner wall of the second end of the adjusting sleeve 30. In this case, the spiral direction of the spiral groove on the second end is opposite to that of the spiral groove on the first end. Thus, when the adjusting sleeve 30 rotates, the slider on the first cylinder 10 will slide in the spiral groove at the first end of the adjusting sleeve 30, thereby guiding the first cylinder 10 to move axially. Similarly, the slider on the second cylinder 20 slides in the spiral groove at the second end of the adjusting sleeve 30. Since the two spiral grooves are in opposite directions, the first cylinder 10 and the second cylinder 20 move axially in opposite directions, thus moving closer or further apart from each other.

[0043] Furthermore, since the adjusting sleeve 30 is also equipped with a guide 40, when the adjusting sleeve 30 rotates, the guide 40 rotates accordingly. At this time, the third sliding part 41 and the fourth sliding part 42 on the guide 40 are axially slidingly engaged with the first sliding part 11 on the first cylinder 10 and the second sliding part 21 on the second cylinder 20, respectively, to restrict the circumferential degree of freedom of the first cylinder 10 and the second cylinder 20, allowing only axial movement. This prevents the first cylinder 10 and the second cylinder 20 from rotating and allows them to slide axially. Thus, the third and fourth sliding parts on the guide 40, in cooperation with the first and second sliding parts, provide guidance for the movement of the first cylinder 10 and the second cylinder 20, ensuring their stability during movement and preventing wobbling or deviation, thereby improving the stability and reliability of the entire focusing device.

[0044] Compared to the method where the first cylinder 10 and the second cylinder 20 move closer or further apart using telescopic rods, which are typically connected at a single point or a few points and offer relatively little constraint on moving parts, making them more prone to swaying or swinging under external interference or uneven load, leading to unstable adjustment, the optical focusing device in this embodiment forms multiple contact points and constraint points through the rotational engagement of the first, second, third, and fourth guide parts and the axial sliding engagement of the first, second, third, and fourth sliding parts. These multi-point contacts can restrict and guide the movement of the cylinders at multiple positions, evenly distributing the forces on the first cylinder 10 and the second cylinder 20, effectively preventing swaying or deviation during movement, thereby effectively constraining the movement of the first cylinder 10 and the second cylinder 20 and making them more stable during focusing.

[0045] Meanwhile, since the first sliding part 11 and the third sliding part 41, and the second sliding part 21 and the fourth sliding part 42 are usually in surface contact, this surface contact method can provide a larger contact area, making the force more evenly distributed on the contact surface. When the first cylinder 10 or the second cylinder 20 is subjected to external force, the surface contact sliding part can better bear and disperse these forces, reduce local stress concentration, so that the first cylinder 10 and the second cylinder 20 are not easy to shake when they move, thereby improving the stability of the entire structure.

[0046] More specifically, during installation, the operator only needs to align the first guide part 12 and the first sliding part 11 of the first cylinder 10 with the third guide part 31 of the adjusting sleeve 30 and the third sliding part 41 of the guide 40, respectively. The corresponding parts of the second cylinder 20 are also operated in the same way to complete the assembly. There is no need for complicated debugging or calibration process, which greatly reduces the installation difficulty and time cost, and makes subsequent maintenance more convenient.

[0047] Compared to telescopic rods or connecting rods, which require consideration of connection methods and force balance, making the installation process relatively complex, and whose internal structures are more complex, repair and debugging are also more difficult when malfunctions occur. In contrast, the slide rail and groove structure in this embodiment is relatively simple, making installation and maintenance more convenient, and facilitating subsequent inspection and replacement of worn parts.

[0048] It should be noted that in this embodiment, the first sliding part 11 can be a longitudinal guide rail (such as a T-shaped guide rail or a dovetail guide rail) provided on the outer wall of the first cylinder 10, while the third sliding part 41 is a matching slider (such as a T-shaped slider) provided at a corresponding position on the inner side of the guide member 40. Similarly, the second sliding part 21 and the fourth sliding part 42 are respectively a guide rail and a slider provided on the second cylinder 20 and the guide member 40, and the direction of the guide rail on the second cylinder 20 is parallel to the guide rail of the first cylinder 10. The slider is tightly fitted with the guide rail through the groove, allowing free sliding along the guide rail direction (axial direction), but restricting circumferential rotation. Of course, the first sliding part 11 and the second sliding part 21 can also be sliders respectively provided on the first cylinder 10 and the second cylinder 20, while the third sliding part 41 and the fourth sliding part 42 are two grooves on the guide member 40, which can also achieve the above effect.

[0049] More specifically, in this embodiment, the third sliding part 41 and the fourth sliding part 42 are respectively provided on opposite sides of the guide member 40. In this way, when the first sliding part 11 and the second sliding part 21 on the first cylinder 10 and the second cylinder 20 slide on their respective sides, the first cylinder 10 and the second cylinder 20 can move in a staggered manner on both sides of the guide member 40. Thus, when the first cylinder 10 and the second cylinder 20 approach each other, there is an interlaced space between them, so that they can interlock like the teeth of a zipper during the approach process, thereby achieving contraction without interfering with each other.

[0050] Furthermore, the guide 40 includes a guide block 43, which is installed inside the adjusting sleeve 30. The guide block 43 has a first side and a second side that are opposite to each other. A third sliding part 41 is provided on the first side, and a fourth sliding part 42 is provided on the second side. The third sliding part 41 and the fourth sliding part 42 are offset in the rotation direction of the adjusting sleeve 30. When the adjusting sleeve 30 rotates, the first cylinder 10 and the second cylinder 20 move closer to each other along the axial direction of the adjusting sleeve 30 to retract into the adjusting sleeve 30, or move away from each other and extend out of the adjusting sleeve 30.

[0051] Based on this, taking the first side as the side where the guide block 43 faces the inner wall of the adjusting sleeve 30, and the second side as the side where the guide block 43 faces away from the inner wall of the adjusting sleeve 30 as an example, in this case, both the third guide part 31 and the fourth guide part 32 are located inside the adjusting sleeve 30. This provides space for the first cylinder 10 and the second cylinder 20 through the inner cavity of the adjusting sleeve 30, thus providing some protection for these components and reducing interference from external factors. Simultaneously, because the third sliding part 41 and the fourth sliding part 42 are respectively located on opposite sides of the guide block 43, the first sliding part 11, which slides with the third sliding part 41, and the second sliding part 21, which slides with the fourth sliding part 42, are staggered. This allows the first cylinder 10 and the second cylinder 20 to have space to overlap when they approach each other, enabling them to retract into the adjusting sleeve 30.

[0052] Furthermore, in this embodiment, the third sliding part 41 and the fourth sliding part 42 are offset in the rotation direction of the adjusting sleeve 30. When the adjusting sleeve 30 rotates, this offset setting causes the first sliding part 11 and the second sliding part 21, which cooperate with the third sliding part 41 and the fourth sliding part 42, to generate a component force along the axial direction of the adjusting sleeve 30 while rotating with the adjusting sleeve 30. This pushes the first cylinder 10 and the second cylinder 20 to move axially, so that the two can move closer to each other and retract into the adjusting sleeve 30 along the axial direction of the adjusting sleeve 30, or move away from each other and extend out of the adjusting sleeve 30, so as to realize the focusing function in a limited space, making the entire device structure more compact and saving space.

[0053] Furthermore, a first limiting hole 111 is provided on the first sliding part 11, and a first limiting post (not shown in the figure) passes through the first limiting hole 111. A first limiting groove 431 is provided on the guide block 43, and the first limiting groove 431 is provided on the third sliding part 41. The first limiting post passes through the first limiting groove 431 and abuts against the groove wall of the first limiting groove 431 when the first sliding part 11 and the third sliding part 41 slide together.

[0054] Specifically, when the first sliding part 11 slides relative to the third sliding part 41, the first limiting post moves together with the first sliding part 11. When the first limiting post moves to the end of the first limiting groove 431, it abuts against the groove wall, preventing the first sliding part 11 from continuing to slide in that direction, thereby limiting the range of motion of the first sliding part 11. This further limits the travel of the first cylinder 10, ensuring that the first cylinder 10 does not exceed a reasonable range during focusing, thus preventing damage to the equipment or impact on optical performance due to excessive movement.

[0055] It should be noted that the first limiting post can be made of existing bolts or nuts or other connecting parts.

[0056] Preferably, in this embodiment, the first sliding part 11 is a first slider provided on the first cylinder 10, and the third sliding part 41 is a first sliding groove provided on the guide block 43. The first slider is fitted into the first sliding groove and slides against the groove wall of the first sliding groove to guide the first cylinder 10 to move axially along the adjusting sleeve 30 when the adjusting sleeve 30 rotates. During assembly, it is only necessary to align the first slider with the first sliding groove and then insert it into the first sliding groove. There is no need for cumbersome installation positioning or too many adjustment steps, making installation simpler and improving installation efficiency.

[0057] More specifically, a second limiting hole 211 is provided on the second sliding part 21, and a second limiting post (not shown in the figure) passes through the second limiting hole 211. A first limiting groove 432 is provided on the guide block 43, and the first limiting groove 432 is located in the fourth sliding part 42. The second limiting post passes through the first limiting groove 432 and abuts against the groove wall of the first limiting groove 432 when the second sliding part 21 and the fourth sliding part 42 slide in cooperation. Thus, when the second sliding part 21 and the fourth sliding part 42 slide relative to each other, the second limiting post moves with the second sliding part 21. When the second limiting post moves to the end of the first limiting groove 432, it abuts against the groove wall, preventing the second sliding part 21 from continuing to slide in that direction, thereby limiting the range of movement of the second sliding part 21. This, in turn, limits the travel of the second cylinder 20, ensuring that the second cylinder 20 does not exceed a reasonable range during focusing.

[0058] It should be noted that the second limiting post can also be made of existing bolts or nuts or other connecting parts.

[0059] Preferably, the second sliding part 21 is a second slider provided on the second cylinder 20, and the fourth sliding part 42 is a second slide groove provided on the guide block 43. The second slider is embedded in the second slide groove and slides in cooperation with the groove wall of the second slide groove to guide the second cylinder 20 to move axially along the adjusting sleeve 30 when the adjusting sleeve 30 rotates.

[0060] Furthermore, the adjusting sleeve 30 is also provided with a connecting groove 33, which extends circumferentially along the adjusting sleeve 30. The bottom of the guide block 43 is also provided with a connecting arm 44, which is engaged with the connecting groove 33.

[0061] Specifically, after the guide block 43 is engaged with the connecting groove 33 via the connecting arm 44, the groove wall of the connecting groove 33 constrains the connecting arm 44 in the axial direction, thus limiting the axial displacement of the guide block 43. Simultaneously, since the connecting groove 33 extends circumferentially along the adjusting sleeve 30, the guide block 43 can rotate freely in its circumferential direction as the adjusting sleeve 30 rotates. In this way, while the guide block 43 rotates freely within the adjusting sleeve 30, its axial displacement is restricted, ensuring that it can only rotate with the adjustment sleeve 30 without unnecessary axial movement, thereby making the focusing process more stable.

[0062] Furthermore, the bottom connecting ring 34 and mounting ring 35 of the adjusting sleeve 30 are detachably connected. The connecting ring 34 has a connecting notch 341, into which the connecting arm 44 extends. After the connecting arm 44 extends into the connecting notch 341, the mounting ring 35 connects to the connecting ring 34 and abuts against the bottom end of the connecting arm 44, so that a connecting groove 33 is formed at the bottom of the adjusting sleeve 30. Specifically, the bottom of the adjusting sleeve 30 is designed as a detachable structure of the connecting ring 34 and the mounting ring 35, allowing the connecting arm 44 on the guide block 43 to be positioned into the connecting ring 34 through the connecting notch 341 first, and then fixed by the mounting ring 35. This step-by-step assembly method simplifies the assembly process; when the guide block 43 needs to be inspected or replaced, only the mounting ring 35 needs to be removed to take out the connecting arm 44, without disassembling the entire adjusting sleeve 30, effectively reducing the maintenance difficulty.

[0063] It should be noted that the connecting ring 34 and the mounting ring 35 can be detachably connected by means of bolt connection or snap connection.

[0064] Furthermore, a plurality of first through holes 36 are provided at the bottom of the adjusting sleeve 30. The plurality of first through holes 36 are distributed at intervals along the circumference of the adjusting sleeve 30. A plurality of second through holes 342 are provided on the connecting ring 34, and a plurality of third through holes 351 are provided on the mounting ring 35. The plurality of first through holes 36, the plurality of second through holes 342 and the plurality of third through holes 351 are provided in a one-to-one correspondence and are used to connect the connecting parts.

[0065] Based on this structure, during assembly, multiple first through holes 36, multiple second through holes 342, and multiple third through holes 351 can be aligned, and then connectors (such as screws, bolts, or pins) can be passed through the third through holes 351, the second through holes 342, and the first through holes 36 in sequence to lock them in place and achieve a stable connection.

[0066] In addition, multiple through holes and connectors (such as bolts and pins) evenly distributed along the circumference are used to achieve multi-point fixation between the adjusting sleeve 30, the connecting ring 34 and the mounting ring 35, thereby improving the stability and reliability of the connection.

[0067] Furthermore, the first guide portion 12 is a first threaded segment located on the outer periphery of the first cylinder 10, and the second guide portion 22 is a second threaded segment located on the outer periphery of the second cylinder 20; the second threaded segment has the opposite rotation direction to the first threaded segment; the third guide portion 31 is a third threaded segment located on the first end, and the third threaded segment is helically engaged with the first threaded segment; the fourth guide portion 32 is a fourth threaded segment located on the second end, and the fourth threaded segment is helically engaged with the second threaded segment; the fourth threaded segment has the opposite rotation direction to the third threaded segment.

[0068] Based on this structure, the first threaded section is screwed into the third threaded section, and the second threaded section is screwed into the fourth threaded section. In this way, when the adjusting sleeve 30 is rotated, the position changes of the first cylinder 10 and the second cylinder 20 can be controlled by the screw drive of the threads. At the same time, since the fourth threaded section and the third threaded section have opposite directions of rotation, and the second threaded section and the first threaded section also have opposite directions of rotation, when the first cylinder 10 and the second cylinder 20 rotate at the same time, the first end and the second end will move relatively closer or further apart.

[0069] In addition, compared with other connection methods, threaded connections have good self-locking performance and high connection strength, which can provide stable connection and support for the first cylinder 10, the second cylinder 20 and the first end and the second end, so that the device can withstand certain axial and radial loads during rotation, improve the stability of the structure and reduce vibration and noise.

[0070] Furthermore, a limiting ring 13 is provided at the top of the first cylinder 10. The limiting ring 13 extends circumferentially along the first cylinder 10 and abuts against the periphery of the adjusting sleeve 30 when the first cylinder 10 moves closer to the second cylinder 20. Thus, when the first cylinder 10 moves closer to the second cylinder 20 until the limiting ring 13 abuts against the periphery of the adjusting sleeve 30, the presence of the limiting ring 13 prevents the first cylinder 10 from moving further, thereby alerting the user that the first cylinder 10 has reached its limit position. This effectively avoids damage to components due to excessive movement, ensuring that the movement stroke of the first cylinder 10 operates within a predetermined range, thus improving the reliability and stability of the device.

[0071] Furthermore, multiple guide members 40 are provided, and the multiple guide members 40 are distributed at intervals along the circumference of the adjusting sleeve 30; multiple first sliding parts 11 are provided on the first cylinder 10, and the multiple first sliding parts 11 are respectively slidably engaged with multiple third sliding parts 41; multiple second sliding parts 21 are provided on the second cylinder 20, and the multiple second sliding parts 21 are slidably engaged with multiple fourth sliding parts 42.

[0072] Based on this structure, multiple guide members 40 are distributed circumferentially along the adjusting sleeve 30. Multiple first sliding portions 11 on the first cylinder 10 are axially slidingly engaged with third sliding portions 41 on each guide member 40, and multiple second sliding portions 21 on the second cylinder 20 are axially slidingly engaged with fourth sliding portions 42 on each guide member 40. Through the engagement of multiple guide members 40 with multiple first sliding portions 11 and multiple second sliding portions 21, the movement of the adjusting sleeve 30 is guided and constrained at multiple points, preventing individual guide members 40 from bearing excessive loads. This improves the load-bearing capacity and stability of the entire structure and reduces the possibility of damage to the guide members 40 due to excessive local stress. Even if one guide member 40 fails or wears out, the other guide members 40 can still ensure the normal movement of the adjusting sleeve 30 to a certain extent, improving the reliability and fault tolerance of the entire system and reducing the risk of system failure due to the failure of a single component.

[0073] More specifically, the third sliding portion 41 and the fourth sliding portion 42 on the multiple guide members 40 respectively slide in cooperation with the multiple first sliding portions 11 and the multiple second sliding portions 21, making the movement of the first cylinder 10 and the second cylinder 20 smoother. They can support and guide the movement of the cylinder at different positions, reducing deformation and jamming caused by the weight of the cylinder itself or external forces, so that the cylinder can perform stable linear or rotational movement as required.

[0074] It should be noted that in this embodiment, three guide members 40 are provided, with three first sliding parts 11 and three second sliding parts 21 respectively provided on the first cylinder 10 and the second cylinder 20. Of course, in other embodiments, the guide members 40 can also be four, five or more, and the first sliding parts 11 and the second sliding parts 21 can be provided in a corresponding manner.

[0075] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An optical focusing device, characterized in that, include: A focusing component, comprising a first cylindrical body (10) and a second cylindrical body (20), wherein the first cylindrical body (10) is provided with a first sliding part (11) and a first guiding part (12), and the second cylindrical body (20) is provided with a second sliding part (21) and a second guiding part (22); An adjustment assembly includes an adjustment sleeve (30) and a guide (40). The adjustment sleeve (30) has a first end and a second end disposed opposite to each other. The first end has a third guide portion (31), which is rotatably engaged with the first guide portion (12). The second end has a fourth guide portion (32), which is rotatably engaged with the second guide portion (22). The guide (40) is connected to the adjusting sleeve (30); the guide (40) is provided with a third sliding part (41) and a fourth sliding part (42), the third sliding part (41) is axially slidingly engaged with the first sliding part (11), and the fourth sliding part (42) is axially slidingly engaged with the second sliding part (21).

2. The optical focusing device as described in claim 1, characterized in that, The guide (40) includes a guide block (43), which is installed inside the adjusting sleeve (30); the guide block (43) has a first side and a second side that are opposite to each other, a third sliding part (41) is provided on the first side, and a fourth sliding part (42) is provided on the second side; the third sliding part (41) and the fourth sliding part (42) are offset from each other in the rotation direction of the adjusting sleeve (30); The first cylinder (10) and the second cylinder (20) are used to move closer to each other along the axial direction of the adjusting sleeve (30) to retract into the adjusting sleeve (30) or to move further away from each other and extend out of the adjusting sleeve (30) when the adjusting sleeve (30) rotates.

3. The optical focusing device as described in claim 2, characterized in that, The first sliding part (11) is provided with a first limiting hole (111), and a first limiting post is inserted through the first limiting hole (111). The guide block (43) is provided with a first limiting groove (431), and the first limiting groove (431) is provided on the third sliding part (41). The first limiting post is inserted through the first limiting groove (431).

4. The optical focusing device as described in claim 2, characterized in that, The second sliding part (21) is provided with a second limiting hole (211), and a second limiting post is inserted through the second limiting hole (211); the guide block (43) is provided with a second limiting groove (432), and the second limiting groove (432) is provided on the fourth sliding part (42); the second limiting post is inserted through the second limiting groove (432).

5. The optical focusing device as described in claim 2, characterized in that, The adjusting sleeve (30) is also provided with a connecting groove (33), which extends along the circumference of the adjusting sleeve (30); the bottom of the guide block (43) is also provided with a connecting arm (44), which is engaged in the connecting groove (33).

6. The optical focusing device as described in claim 5, characterized in that, The adjusting sleeve (30) has a bottom connecting ring (34) and a mounting ring (35). The mounting ring (35) is detachably connected to the connecting ring (34). The connecting ring (34) has a connecting notch (341). The connecting arm (44) extends into the connecting notch (341). The mounting ring (35) is used to connect with the connecting ring (34) after the connecting arm (44) extends into the connecting notch (341) and abuts against the bottom end of the connecting arm (44) so ​​that the bottom of the adjusting sleeve (30) forms the connecting groove (33).

7. The optical focusing device as described in claim 6, characterized in that, The bottom of the adjusting sleeve (30) is provided with a plurality of first through holes (36), which are distributed at intervals along the circumference of the adjusting sleeve (30). The connecting ring (34) is provided with a plurality of second through holes (342), and the mounting ring (35) is provided with a plurality of third through holes (351). The plurality of first through holes (36), the plurality of second through holes (342), and the plurality of third through holes (351) are provided in a one-to-one correspondence and are used for connecting the connecting parts.

8. The optical focusing device according to any one of claims 1-7, characterized in that, The first guide portion (12) is a first threaded section provided on the outer periphery of the first cylinder (10), and the second guide portion (22) is a second threaded section provided on the outer periphery of the second cylinder (20); the second threaded section has the opposite rotation direction to the first threaded section; The third guide (31) is a third threaded segment provided on the first end, and the third threaded segment is helically engaged with the first threaded segment; the fourth guide (32) is a fourth threaded segment provided on the second end, and the fourth threaded segment is helically engaged with the second threaded segment; the direction of rotation of the fourth threaded segment is opposite to that of the third threaded segment.

9. The optical focusing device according to any one of claims 1-7, characterized in that, The top of the first cylinder (10) is also provided with a limiting ring (13), which extends along the circumference of the first cylinder (10) and is used to abut against the circumference of the adjusting sleeve (30) when the first cylinder (10) moves close to the second cylinder (20).

10. The optical focusing device according to any one of claims 1-7, characterized in that, The guide (40) is provided in multiple ways, and the multiple guides (40) are distributed at intervals along the circumference of the adjusting sleeve (30); the first cylinder (10) is provided with multiple first sliding parts (11), and the multiple first sliding parts (11) are respectively slidably engaged with multiple third sliding parts (41); the second cylinder (20) is provided with multiple second sliding parts (21), and the multiple second sliding parts (21) are slidably engaged with multiple fourth sliding parts (42).

Images