High-protection precision straight cylinder

Abstract

The utility model discloses a high protection precision straight inlet cylinder, including outer mirror tube and inner mirror tube, the outer wall of inner mirror tube is provided with the reinforcing rib, still include: the pitch of reinforcing rib gradually changes along the axial direction of inner mirror tube, and the cross section of reinforcing rib is trapezoidal structure, the inner surface of outer mirror tube is equipped with the guide groove of with reinforcing rib engages, the inner wall of outer mirror tube is close to both ends and is all equipped with the thread groove, the thread groove is connected with the limit ring through screw thread, one end of inner mirror tube is equipped with the buffer pad. The utility model discloses a high protection precision straight inlet cylinder can enhance its anti -vibration protection effect, reduce the noise of producing when using, avoid inner mirror tube radial displacement, prolong the service life of straight inlet cylinder, improve the effect of imaging definition.

Description

Technical Field

[0001] This utility model relates to the field of optical instrument technology, and in particular to a high-protection precision straight-through cylinder. Background Technology

[0002] A linear camera lens barrel is a precision mechanical structure in a camera optical system that achieves zooming or focusing through linear motion. It typically employs a double-layered design, where the lens is mounted in the inner layer and the outer layer provides guidance and support. When focusing, simply rotating the spiral ring causes the lens to move back and forth in a straight line along the guide groove, while the orientation of the scale on the lens barrel remains unchanged during focusing, thereby improving focusing accuracy.

[0003] However, traditional straight-in-the-eye tubes typically use an aluminum straight-groove guide structure, which may have poor drop resistance. Specifically, when subjected to impact or drop, the endoscope tube may deform, which may cause the optical axis to shift, thus affecting the image clarity.

[0004] For example, when the lens barrel falls from a certain height, its optical axis may shift slightly, which may cause obvious unilateral blurring in the image, thus affecting its image quality and sharpness. Utility Model Content

[0005] This utility model discloses a high-protection precision straight-in-the-eye tube, which aims to solve the problem that traditional straight-in-the-eye tubes usually adopt an aluminum straight groove guide structure, which may have poor drop resistance. Specifically, when subjected to impact or drop, the endoscope tube may deform, which may cause the optical axis to shift, thereby affecting the image clarity.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-protection precision straight-through tube includes an outer endoscope tube and an inner endoscope tube. The outer wall of the inner endoscope tube is provided with a reinforcing rib. The reinforcing rib has a gradually changing pitch along the axial direction of the inner endoscope tube and a trapezoidal cross-section. The inner surface of the outer endoscope tube has a guide groove that meshes with the reinforcing rib. The inner walls of the outer endoscope tube near both ends are provided with threaded grooves. The threaded grooves are connected to limit rings through threaded connections. One end of the inner endoscope tube is provided with a buffer pad.

[0008] The above technical solution enhances its vibration protection effect, reduces noise during use, prevents radial displacement of the endoscope tube, extends the service life of the straight-through tube, and improves imaging clarity. Specifically, the high-protection precision straight-through tube achieves stable linear movement of the endoscope tube through the engagement of a spiral reinforcing rib with a guide groove, and is supplemented by a limiting ring and a buffer pad to prevent overtravel impact. The trapezoidal cross-section reinforcing rib contacts the inclined surface of the guide groove, increasing the force-bearing area, reducing local wear, and preventing radial sway. When the endoscope tube moves to the end of its stroke, the buffer pad at its end contacts the limiting ring. The buffer pad absorbs impact energy through elastic deformation, reducing noise. The rigid blocking of the limiting ring ensures that the endoscope tube will not collide with the end of the outer endoscope tube.

[0009] In a preferred embodiment, a plurality of ceramic microspheres are embedded at the bottom of the guide groove, and the plurality of ceramic microspheres are distributed at equal intervals along the inner wall of the guide groove.

[0010] In this solution, the rolling contact of ceramic microspheres replaces sliding friction, avoiding the jamming problem of traditional straight-through cylinders at low-speed zoom. Furthermore, the rolling of ceramic microspheres can scrape away tiny dust particles in the guide groove, reducing the risk of jamming.

[0011] In a preferred embodiment, a connecting plate is fixedly connected to one end of the endoscope tube. The connecting plate has several dovetail grooves distributed at equal intervals. Several wedge-shaped blocks are embedded in the inner wall of the outer endoscope tube, and the wedge-shaped blocks are positioned corresponding to the dovetail grooves. A connecting groove is formed on one side of the outer wall of the wedge-shaped block near the middle. A groove is formed on the inner wall of the dovetail groove. A return spring is provided on the inner wall of the connecting groove. A limit block is fixedly connected to one end of the return spring, and the limit block is adapted to the groove.

[0012] In this design, the connecting plate of the endoscope tube is aligned with the wedge block array of the outer endoscope tube and pushed in axially. The inclined surface of the wedge block contacts the inclined surface of the dovetail groove, compressing the reset spring and causing the limiting block to temporarily retract into the connecting groove. When the dovetail groove slides completely into the wedge block, the limiting block pops out under the action of the spring and locks into the groove on the inner wall of the dovetail groove, completing self-locking. When zooming or being impacted, the dovetail structure of the wedge block converts the lateral shear force into axial clamping force, preventing radial displacement of the endoscope tube.

[0013] As described above, a high-protection precision straight-through tube includes an outer endoscope tube and an inner endoscope tube. The outer wall of the inner endoscope tube is provided with reinforcing ribs. The reinforcing ribs have a gradually changing pitch along the axial direction of the inner endoscope tube, and their cross-section is trapezoidal. The inner surface of the outer endoscope tube has guide grooves that mesh with the reinforcing ribs. Threaded grooves are formed on the inner walls of the outer endoscope tube near both ends. These threaded grooves are connected to limit rings via threaded connections. A buffer pad is provided at one end of the inner endoscope tube. The high-protection precision straight-through tube provided by this invention has the technical effects of improving the vibration resistance of the straight-through tube, reducing noise, and extending its service life. Attached Figure Description

[0014] Figure 1 This is an exploded view of the overall structure of a high-protection precision straight-through cylinder proposed in this utility model.

[0015] Figure 2 This is a cross-sectional view of the outer lens barrel structure of a high-protection precision straight-through tube proposed in this utility model.

[0016] Figure 3 This is a schematic diagram of the dovetail groove and limiting groove structure of a high-protection precision straight-in cylinder proposed in this utility model.

[0017] Figure 4 This is a front view of a high-protection precision straight-through cylinder proposed in this utility model.

[0018] Figure 5 This is a cross-sectional view of a dovetail groove structure for a high-protection precision straight-through cylinder proposed in this utility model.

[0019] In the attached diagram: 1. Outer tube; 2. Inner tube; 3. Mounting groove; 4. Sealing ring; 5. Limiting ring; 6. Threaded groove; 7. Guide groove; 8. Ceramic microspheres; 9. Reinforcing rib; 10. Connecting plate; 11. Dovetail groove; 12. Limiting groove; 13. Wedge block; 14. Return spring; 15. Limiting block. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] The high-protection precision straight-in-line tube disclosed in this utility model is mainly used in traditional straight-in-line tubes that usually adopt an aluminum straight groove guide structure, which may have poor drop resistance. Specifically, when subjected to impact or drop, the endoscope tube may deform, which may cause the optical axis to shift, thereby affecting the image clarity.

[0022] Reference Figure 1 , Figure 2 and Figure 4 A high-protection precision straight-through tube includes an outer tube 1 and an inner tube 2. The outer wall of the inner tube 2 is provided with a reinforcing rib 9. The reinforcing rib 9 has a gradually changing pitch along the axial direction of the inner tube 2 and a trapezoidal cross-section. The inner surface of the outer tube 1 is provided with a guide groove 7 that meshes with the reinforcing rib 9. The inner walls of the outer tube 1 near both ends are provided with threaded grooves 6. The threaded grooves 6 are connected to limit rings 5 ​​by threads. One end of the inner tube 2 is provided with a buffer pad.

[0023] It should be noted that the endoscope tube 2 and the outer endoscope tube 1 are made of magnesium alloy or carbon fiber reinforced composite material.

[0024] Among them, the reinforcing rib 9 has a spiral structure, and the inner wall of the endoscope tube 2 adopts a honeycomb structure. The honeycomb hexagonal structure can effectively disperse the high-frequency vibration energy during the zoom process and reduce imaging shake.

[0025] In the specific implementation process, a number of ceramic microbeads 8 are embedded at the bottom of the guide groove 7. The ceramic microbeads 8 are distributed at equal intervals along the inner wall of the guide groove 7. The rolling contact of the ceramic microbeads 8 replaces the sliding friction, avoiding the jamming problem of the traditional straight-in cylinder at low speed zoom. In addition, the rolling of the ceramic microbeads 8 can scrape away the tiny dust in the guide groove 7, reducing the risk of jamming.

[0026] Specifically, this high-protection precision straight-infeed tube achieves stable linear movement of the endoscope tube 2 through the engagement of the spiral reinforcing rib 9 with the guide groove 7, and is supplemented by a limiting ring 5 and a buffer pad to prevent overtravel impact. The trapezoidal cross-section reinforcing rib 9 contacts the inclined surface of the guide groove 7, increasing the force-bearing area, reducing local wear, and preventing radial sway. When the endoscope tube 2 moves to the end of its stroke, the buffer pad at its end contacts the limiting ring 5. The buffer pad absorbs impact energy through elastic deformation, reducing noise. The rigid blocking of the limiting ring 5 ensures that the endoscope tube 2 will not collide with the end of the outer endoscope tube 1. This high-protection precision straight-infeed tube can enhance its vibration protection effect, reduce the noise generated during use, prevent radial displacement of the endoscope tube 2, extend the service life of the straight-infeed tube, and improve imaging clarity.

[0027] Reference Figure 1 , Figure 2 and Figure 4In a preferred embodiment, an installation groove 3 is provided at one end of the outer endoscope tube 1, and a sealing ring 4 is provided on the inner wall of the installation groove 3. The sealing ring 4 and the outer wall of the inner endoscope tube 2 form a multi-level stepped gap. When the inner endoscope tube 2 reciprocates, the sharp edge of the stepped gap can scrape off the particles attached to the outer wall, which can significantly improve the dustproof, waterproof and movement stability of the straight tube.

[0028] Reference Figure 1 and Figure 3 In a preferred embodiment, the endoscope tube 2 is integrally formed by metal injection molding, and the outer surface of the endoscope tube 2 is provided with a graphene coating. The graphene coating has good wear resistance and corrosion resistance, which can extend the service life of the endoscope tube 2.

[0029] Reference Figure 3 and Figure 5 In a preferred embodiment, a connecting plate 10 is fixedly connected to one end of the endoscope tube 2. The connecting plate 10 has a plurality of dovetail grooves 11 that are evenly distributed. A plurality of wedge blocks 13 that are evenly distributed are embedded in the inner wall of the outer endoscope tube 1. The wedge blocks 13 are positioned corresponding to the dovetail grooves 11. A connecting groove is provided on one side of the outer wall of the wedge block 13 near the middle. A limiting groove 12 is provided on the inner wall of the dovetail groove 11. A return spring 14 is provided on the inner wall of the connecting groove. A limiting block 15 is fixedly connected to one end of the return spring 14. The limiting block 15 is adapted to the limiting groove 12.

[0030] Specifically, the connecting plate 10 of the endoscope tube 2 is aligned with the wedge block 13 array of the outer endoscope tube 1 and pushed in axially. The inclined surface of the wedge block 13 contacts the inclined surface of the dovetail groove 11, compressing the reset spring 14 and causing the limiting block 15 to temporarily retract into the connecting groove. When the dovetail groove 11 slides completely into the wedge block 13, the limiting block 15 pops out under the action of the spring and is locked into the limiting groove 12 on the inner wall of the dovetail groove 11, completing the self-locking. When zooming or being impacted, the dovetail structure of the wedge block 13 converts the transverse shear force into the axial clamping force, preventing the endoscope tube 2 from radially displacing.

[0031] Working principle: During use, the high-protection precision straight-in cylinder achieves stable linear movement of the endoscope tube 2 through the engagement of the spiral reinforcing rib 9 with the guide groove 7, and is supplemented by the limiting ring 5 and the buffer pad to prevent overtravel impact. The trapezoidal cross-section reinforcing rib 9 contacts the inclined surface of the guide groove 7, increasing the force-bearing area, reducing local wear, and preventing radial sway. When the endoscope tube 2 moves to the end of its stroke, the buffer pad at its end contacts the limiting ring 5. The buffer pad absorbs the impact energy through elastic deformation, reducing noise. The rigid blocking of the limiting ring 5 ensures that the endoscope tube 2 will not collide with the end of the outer endoscope tube 1.

[0032] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A high-protection precision straight-through tube, comprising an outer tube (1) and an inner tube (2), characterized in that, The outer wall of the endoscope tube (2) is provided with reinforcing ribs (9), and also includes: The pitch of the reinforcing rib (9) gradually changes along the axial direction of the endoscope tube (2), and the cross-section of the reinforcing rib (9) is trapezoidal. The inner surface of the outer endoscope tube (1) is provided with a guide groove (7) that meshes with the reinforcing rib (9). The inner walls of the outer endoscope tube (1) near both ends are provided with threaded grooves (6). The threaded grooves (6) are connected to a limit ring (5) by thread. One end of the endoscope tube (2) is provided with a buffer pad.

2. The high-protection precision straight-line cylinder according to claim 1, characterized in that, The reinforcing rib (9) has a spiral structure, and the inner wall of the endoscope tube (2) has a honeycomb structure.

3. The high-protection precision straight-through cylinder according to claim 2, characterized in that, The bottom of the guide groove (7) is embedded with a number of ceramic microbeads (8), and the number of ceramic microbeads (8) are distributed at equal intervals along the inner wall of the guide groove (7).

4. The high-protection precision straight-line cylinder according to claim 1, characterized in that, One end of the outer endoscope tube (1) is provided with an installation groove (3), and the inner wall of the installation groove (3) is provided with a sealing ring (4). The sealing ring (4) and the outer wall of the inner endoscope tube (2) form a multi-level stepped gap.

5. A high-protection precision straight-through cylinder according to claim 4, characterized in that, The endoscope tube (2) is integrally formed by metal injection molding, and the outer surface of the endoscope tube (2) is coated with graphene.

6. A high-protection precision straight-through cylinder according to claim 5, characterized in that, One end of the endoscope tube (2) is fixedly connected to a connecting plate (10), and the connecting plate (10) has several dovetail grooves (11) that are evenly distributed. The inner wall of the outer endoscope tube (1) is fitted with several wedge blocks (13) that are evenly distributed, and the wedge blocks (13) correspond to the positions of the dovetail grooves (11).

7. A high-protection precision straight-line cylinder according to claim 6, characterized in that, A connecting groove is provided on one side of the outer wall of the wedge block (13) near the middle position. A limiting groove (12) is provided on the inner wall of the dovetail groove (11). A reset spring (14) is provided on the inner wall of the connecting groove. One end of the reset spring (14) is fixedly connected to a limiting block (15). The limiting block (15) is adapted to the limiting groove (12).

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