Optical fiber head interface protection sleeve

Abstract

The utility model discloses a kind of optical fiber head interface protective sleeve, it is related to optical fiber head technical field, including two annular clamping grooves, coaxially open in the outer wall surface of joint body, and along joint body axial interval distribution;Four sliding blocks, all fixedly installed in the outer wall surface of joint body, and located between two annular clamping grooves along the even distribution of joint body circumference;Protective sleeve body, it is cylindrical, its inner wall surface is equipped with the guide ring groove corresponding with annular clamping groove and coaxial, the inner wall surface of protective sleeve body is also equipped with four axial extension guide grooves;The utility model is guided to butt joint by sliding block, spring limit plate and ball double locking, realize the accurate positioning and stable connection of protective sleeve body and joint body, avoid loosening deviation when using, guarantee optical fiber head protection effect, solved the problem that the protective cap of existing optical fiber joint has no limiting structure, is easily dropped by one-way force of plug-in direction, leads to the problem that insertion core is exposed.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber head technology, specifically to an optical fiber head interface protective sleeve. Background Technology

[0002] Fiber optic connectors are the core connection components of fiber optic communication, used to accurately connect optical fibers and ensure low-loss transmission of optical signals. They are mainly composed of ceramic ferrules (for high-precision alignment with fiber cores), metal and plastic housings, and locking mechanisms. Some models feature dustproof and sealed designs. They are characterized by reliable connection, good repeatability, and resistance to temperature and corrosion. They can reduce signal attenuation and interference and are widely used in communication networks, data centers, industrial control, and security monitoring. They are an indispensable key component in optical signal transmission links. For example, utility model patent CN218675378U discloses an optical fiber connector, including a pull cap, a ceramic ferrule, a tail shank, a spring, a support tube, and a tail sleeve. Its characteristic is that two cleaving platforms are formed opposite each other on the lower outer wall of the support tube, and an inner plane adapted to the cleaving platforms is formed on the upper inner wall of the through hole on the tail sleeve. This utility model provides an optical fiber connector that can prevent the support tube and tail sleeve from twisting together. However, the protective cap of this type of fiber optic connector lacks a limiting structure and is prone to falling off under unidirectional force in the insertion direction, resulting in the ferrule being exposed. Furthermore, the protective cap and connector are installed separately, which is not fully utilized. After the fiber optic connector is connected, it needs to be stored away, making it very easy to lose. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a protective sleeve for fiber optic connectors. This solves the problems of existing devices where the protective cap lacks a limiting structure, making it prone to detachment under unidirectional force in the insertion direction, resulting in exposed ferrules. Furthermore, the protective cap and connector of this type of fiber optic connector are installed separately, which is not fully utilized. After the fiber optic connector is connected, it needs to be stored away, making it very easy to lose.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fiber optic connector protective sleeve, comprising a ferrule, a protective layer surrounding the ferrule, and a connector body fixedly fitted onto the end of the protective layer, further comprising: Two annular slots are coaxially formed on the outer wall of the connector body and are spaced apart along the axial direction of the connector body. Four sliders are fixedly installed on the outer wall of the connector body and are evenly distributed along the circumference of the connector body between two annular slots. The protective sleeve body is cylindrical, and its inner wall surface is provided with a guide ring groove that corresponds to and is coaxial with the annular slot. The inner wall surface of the protective sleeve body is also provided with four guide grooves that extend axially. The four guide grooves are evenly distributed in the circumferential direction and are all connected to the guide ring groove. The protective cover is a cylindrical shape with one end closed. An annular limiting groove is provided on its outer wall surface. The inner wall of the opening end of the protective cover is threadedly engaged with the inner wall of the connecting end of the protective cover body. The support component has one end rotatably connected to the limiting ring groove and the other end hinged to the outer wall of the protective sleeve body. The four sliders are matched one-to-one with the four guide grooves, with each pair of adjacent guide grooves corresponding to one slider, and they can slide along the guide grooves into the guide ring grooves.

[0005] Preferably, the inner wall surface of the protective sleeve body is provided with four guide grooves evenly distributed circumferentially between the four guide grooves, and the four guide grooves extend along the axial direction of the protective sleeve body; a spring limiting plate is slidably arranged in each guide groove along the axial direction, and the end of the spring limiting plate facing the connector body is provided with an arc-shaped locking part adapted to the annular locking groove, and the arc-shaped locking part can be selectively locked with one of the two annular locking grooves.

[0006] Preferably, the inner wall of the protective sleeve body has eight evenly distributed ball bearing grooves, and the outer wall of the connector body has two axially spaced ball bearing limiting grooves, both of which are symmetrically distributed circumferentially around the connector body. Each ball bearing limiting groove has a limiting ball slidably connected to it, and a return spring is provided between the limiting ball and the bottom wall of the ball bearing limiting groove. The two ends of the return spring are fixedly connected to the spherical surface of the limiting ball and the bottom wall of the ball bearing limiting groove, respectively. The limiting ball can partially protrude from the ball bearing limiting groove and engage with the ball bearing groove.

[0007] Preferably, the support assembly includes a telescopic guide sleeve and a telescopic limiting rod that is slidably connected along the axial direction of the telescopic guide sleeve; a hinge seat is fixedly installed on the outer wall of the protective sleeve body, and one end of the telescopic guide sleeve is hinged to the hinge seat; a support limiting ring is fixedly installed on the end of the telescopic limiting rod away from the telescopic guide sleeve, and the support limiting ring is sleeved in the limiting ring groove and can rotate circumferentially along the limiting ring groove.

[0008] Preferably, the four insertion ends of the guide grooves that connect to the guide ring grooves are all provided with assembly chamfers, and the assembly chamfers are inclined to the inside of the guide grooves.

[0009] Preferably, the outer wall surfaces of both the protective sleeve body and the protective cover are uniformly provided with several anti-slip textures along the circumference.

[0010] Preferably, a circular anti-slip pad is fixedly installed on the outer wall surface of the closed end of the protective cover, and the diameter of the anti-slip pad is adapted to the outer diameter of the protective cover.

[0011] Beneficial effects This utility model provides a protective sleeve for an optical fiber connector, which has the following advantages: By using a slider to guide the docking and a spring limit plate and ball to lock the connection, the protective sleeve body and the connector body are accurately positioned and securely connected, preventing loosening and displacement during use and ensuring the protection effect of the fiber optic head. This solves the problem that the protective cap of the existing fiber optic connector does not have a limit structure and is easy to fall off under unidirectional force in the insertion direction, resulting in the ferrule being exposed. By using a threaded opening and closing mechanism, a support component, and an anti-slip structure, the protective cover can be easily operated while providing all-around protection for the fiber optic head. This prevents wear and slippage of the protective cover and makes full use of the unscrewed protective cover. It solves the problem that existing fiber optic connectors use separate protective caps and connectors, which are not fully utilized and require storage after the fiber optic head is connected, making them very easy to lose. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the unfolded structure of this utility model; Figure 2 This is a schematic diagram of the storage structure of this utility model; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 for Figure 3 A magnified view of a section at point B in the middle; Figure 6 This is a schematic diagram of the connector body structure of this utility model; Figure 7 This is a schematic diagram of the protective sleeve body structure of this utility model; Figure 8 This is a schematic diagram of the protective cover structure of this utility model.

[0013] In the diagram: 1. Insert; 2. Protective layer; 3. Connector body; 4. Annular groove; 5. Slider; 6. Protective sleeve body; 7. Guide ring groove; 8. Guide groove; 9. Protective cover; 10. Limiting ring groove; 11. Guide slide groove; 12. Spring limiting plate; 13. Ball bearing groove; 14. Ball bearing limiting groove; 15. Limiting ball bearing; 16. Return spring; 17. Telescopic guide sleeve; 18. Telescopic limiting rod; 19. Hinge seat; 20. Support limiting ring; 21. Assembly chamfer; 22. Anti-slip texture; 23. Anti-slip pad. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] Please see Figures 1-8A fiber optic connector protective sleeve includes a ferrule 1, a protective layer 2 surrounding the ferrule 1, and a connector body 3 fixedly fitted onto the end of the protective layer 2. It also includes: Two annular slots 4 are coaxially formed on the outer wall of the connector body 3 and are spaced apart along the axial direction of the connector body 3; four sliders 5 are fixedly installed on the outer wall of the connector body 3 and are evenly distributed around the circumference of the connector body 3 between the two annular slots 4. The protective sleeve body 6 is cylindrical, and its inner wall surface is provided with a guide ring groove 7 that corresponds to and is coaxial with the annular slot 4. The inner wall surface of the protective sleeve body 6 is also provided with four guide grooves 8 that extend axially. The four guide grooves 8 are evenly distributed in the circumferential direction and are all connected to the guide ring grooves 7. The protective cover 9 is a cylindrical shape with one end closed. An annular limiting groove 10 is provided on its outer wall surface. The inner wall of the opening end of the protective cover 9 is threadedly engaged with the inner wall of the connecting end of the protective sleeve body 6. The support component has one end rotatably connected to the limiting ring groove 10, and the other end hinged to the outer wall of the protective sleeve body 6. The four sliders 5 are matched one-to-one with the four guide grooves 8. Each pair of adjacent guide grooves 8 corresponds to one slider 5, and the sliders 5 can slide along the guide grooves 8 into the guide ring grooves 7.

[0016] In use, the slider 5 slides along the guide groove 8 into the guide ring groove 7 to achieve quick docking and positioning of the protective sleeve body 6 and the connector body 3. The guide ring groove 7 restricts circumferential displacement and avoids relative torsion. The assembly chamfer 21 guides the slider 5 to smoothly enter the guide groove 8, reducing the difficulty of alignment, avoiding component wear caused by hard contact, and greatly improving assembly efficiency.

[0017] Please see Figures 1-6 The inner wall of the protective sleeve body 6 is located between the four guide grooves 8, and four guide grooves 11 are evenly provided in the circumferential direction. The four guide grooves 11 extend along the axial direction of the protective sleeve body 6. A spring limiting plate 12 is slidably provided in each guide groove 11 along the axial direction. The end of the spring limiting plate 12 facing the connector body 3 is provided with an arc-shaped locking part that is adapted to the annular groove 4. The arc-shaped locking part can be selectively locked and engaged with one of the two annular grooves 4.

[0018] In use, the arc-shaped locking part of the spring limiting plate 12 engages with the annular groove 4 through elasticity to achieve axial limiting, prevent the protective sleeve body 6 from sliding relative to the connector body 3, and enhance connection stability; at the same time, different annular grooves 4 can be selected for locking according to protection requirements to adapt to interface protection scenarios of different lengths.

[0019] Please see Figures 3-5The inner wall of the protective sleeve body 6 is provided with eight evenly distributed ball bearing grooves 13, and the outer wall of the connector body 3 is provided with two axially spaced ball bearing limiting grooves 14. The two ball bearing limiting grooves 14 are symmetrically distributed around the circumference of the connector body 3. Each ball bearing limiting groove 14 is slidably connected with a limiting ball 15. A return spring 16 is provided between the limiting ball 15 and the bottom wall of the ball bearing limiting groove 14. The two ends of the return spring 16 are fixedly connected to the spherical surface of the limiting ball 15 and the bottom wall of the ball bearing limiting groove 14, respectively. The limiting ball 15 can partially protrude from the ball bearing limiting groove 14 and engage with the ball bearing groove 13.

[0020] In use, the reset spring 16 pushes the limiting ball 15 into the ball groove 13 to form a second limiting. The positions of the four sliders 5 can be determined by the eight corresponding ball grooves 13 and the four guide grooves 8. In the working state, when the protective sleeve body 6 cannot move along the axial direction of the connector body 3, it means that the four sliders 5 are respectively in the guide ring groove 7 and located between the four guide grooves 8. It is only necessary to rotate around the axial direction of the connector body 3 until the current limiting ball 15 is inserted into the next ball groove 13. At this time, the four sliders 5 correspond to the four guide grooves 8 respectively.

[0021] Please see Figure 1 , Figure 2 and Figure 8 The support assembly includes a telescopic guide sleeve 17 and a telescopic limiting rod 18 that is slidably connected along the axial direction of the telescopic guide sleeve 17; a hinge seat 19 is fixedly installed on the outer wall of the protective sleeve body 6, and one end of the telescopic guide sleeve 17 is hinged to the hinge seat 19; a support limiting ring 20 is fixedly installed on the end of the telescopic limiting rod 18 away from the telescopic guide sleeve 17, and the support limiting ring 20 is sleeved in the limiting ring groove 10 and can rotate circumferentially along the limiting ring groove 10.

[0022] In use, the threaded engagement secures the protective cover 9 to the protective sleeve body 6. The support component is retractable and rotatable, which does not interfere with the engagement of the protective cover 9 and provides auxiliary support after the protective cover 9 is closed, thus preventing the inside of the protective cover 9 from directly contacting the table and causing wear, and extending the service life of the component.

[0023] Please see Figure 7 The four guide grooves 8 and the guide ring groove 7 are connected by a chamfer 21 at the insertion end, and the chamfer 21 is inclined to the inside of the guide groove 8.

[0024] Please see Figure 2 The outer walls of the protective cover body 6 and the protective cover 9 are evenly provided with a number of anti-slip textures 22 along the circumference. When in use, the outer walls of the protective cover body 6 and the protective cover 9 are evenly provided with a number of anti-slip textures 22 along the circumference, which can increase the friction resistance when holding, avoid slipping when screwing or disassembling, and improve the ease of operation.

[0025] Please see Figure 1 A circular anti-slip pad 23 is fixedly installed on the outer wall of the closed end of the protective cover 9. The diameter of the anti-slip pad 23 is adapted to the outer diameter of the protective cover 9.

[0026] During use, a circular anti-slip pad 23 (with a diameter that matches the outer diameter of the protective cover 9) is fixedly installed on the outer wall of the closed end of the protective cover 9. This not only enhances the stability of the protective cover when it is placed to prevent it from sliding and tipping over, but also buffers the impact of collisions, protects the closed end of the protective cover 9, and further extends the service life of the entire component.

[0027] In Example 1, the slider 5 guides the docking, and the spring limiting plate 12 and the limiting ball 15 provide double locking, so as to achieve precise positioning and stable connection between the protective sleeve body 6 and the connector body 3, avoid loosening and displacement during use, and ensure the protective effect of the fiber optic ferrule 1.

[0028] Specifically, during docking, the operator holds the protective sleeve body 6 and moves it along the axial direction of the connector body 3. The four guide grooves 8 move relative to each of the four sliders 5 until the four spring limit plates 12 are engaged in the annular groove 4 between the sliders 5 and the limit balls 15. At the same time, the limit balls 15 disengage from the ball groove 13 and enter the guide ring groove 7 to form a double limit, restricting the protective sleeve body 6 from continuing to move along the connector body 3. When the insert 1 needs to be placed aside during docking, the protective sleeve body 6 is moved in the opposite direction along the connector body 3 until the slider 5 moves into the guide ring groove 7. At this time, the limiting ball 15 is locked into the corresponding ball slot 13 again. Then, the protective sleeve body 6 is rotated around the connector body 3 until the current limiting ball 15 is locked into the next ball slot 13. At this time, the slider 5 is located between the two guide grooves 8 in the guide ring groove 7, limiting the protective sleeve body 6. Then, the protective cover 9 and the telescopic limiting rod 18 are adjusted to the appropriate position, and the protective cover 9 is screwed into the protective sleeve body 6 to achieve all-round protection of the insert 1.

[0029] Example 2: In this example, the protective cover 9 is made easy to operate and the fiber optic head is protected in all directions by means of threaded opening and closing, support components, and anti-slip structure, so as to avoid wear and slippage of the protective cover 9.

[0030] Specifically, when using the fiber optic connector, grasp the anti-slip texture 22 on the outer wall of the protective cover 9 and apply force to loosen the protective cover 9 in the opposite direction, allowing it to disengage along the threaded structure of the protective sleeve body 6. During the loosening process, the protective cover 9 drives the support limiting ring 20 of the support assembly to rotate along the limiting ring groove 10, and the telescopic limiting rod 18 extends from the telescopic guide sleeve 17, cooperating with the rotation of the hinge seat 19 to provide stable support for the protective cover 9, preventing the protective cover 9 from directly contacting the table and causing wear on the closed end. After use, tighten the protective cover 9 in the forward direction. The threaded engagement ensures a tight seal, and the support assembly retracts and resets synchronously with the closing of the protective cover 9, without occupying extra space. When placing the protective sleeve, the circular anti-slip pad 23 on the closed end of the protective cover 9 increases the friction with the contact surface, preventing slippage and tipping; the anti-slip texture 22 on the outer wall of the protective sleeve body 6 facilitates gripping and operation, balancing convenience and protection throughout the process, effectively protecting the ferrule 1 from collision damage.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fiber optic connector protective sleeve, comprising a ferrule (1), a protective layer (2) surrounding the ferrule (1), and a connector body (3) fixedly fitted onto the end of the protective layer (2), characterized in that, Also includes: Two annular slots (4) are coaxially opened on the outer wall surface of the connector body (3) and are spaced apart along the axial direction of the connector body (3); Four sliders (5) are fixedly installed on the outer wall of the connector body (3) and are evenly distributed around the connector body (3) between two annular slots (4); The protective sleeve body (6) is cylindrical, and its inner wall surface is provided with a guide ring groove (7) that corresponds to and is coaxial with the annular slot (4). The inner wall surface of the protective sleeve body (6) is also provided with four guide grooves (8) extending along the axial direction. The four guide grooves (8) are evenly distributed along the circumference and are all connected to the guide ring grooves (7). The protective cover (9) is a cylindrical shape with one end closed. An annular limiting groove (10) is provided on its outer wall surface. The inner wall of the opening end of the protective cover (9) and the inner wall of the connecting end of the protective sleeve body (6) are screwed together. The support component has one end rotatably connected in the limiting ring groove (10) and the other end hinged to the outer wall of the protective sleeve body (6); The four sliders (5) are matched one-to-one with the four guide grooves (8). Each pair of adjacent guide grooves (8) corresponds to one slider (5), and the sliders (5) can slide along the guide grooves (8) into the guide ring grooves (7).

2. The fiber optic connector protective sleeve according to claim 1, characterized in that, The inner wall of the protective sleeve body (6) is located between the four guide grooves (8), and four guide grooves (11) are evenly provided in the circumferential direction. The four guide grooves (11) extend along the axial direction of the protective sleeve body (6). A spring limiting plate (12) is slidably provided in each guide groove (11) along the axial direction. The end of the spring limiting plate (12) facing the connector body (3) is provided with an arc-shaped locking part that is adapted to the annular slot (4). The arc-shaped locking part can be locked and engaged with one of the two annular slots (4).

3. The fiber optic connector protective sleeve according to claim 2, characterized in that, The inner wall of the protective sleeve body (6) is provided with eight evenly distributed ball bearing grooves (13), and the outer wall of the connector body (3) is provided with two ball bearing limiting grooves (14) distributed axially. The two ball bearing limiting grooves (14) are symmetrically distributed around the connector body (3). Each ball bearing limiting groove (14) is slidably connected with a limiting ball (15). A return spring (16) is provided between the limiting ball (15) and the bottom wall of the ball bearing limiting groove (14). The two ends of the return spring (16) are fixedly connected to the spherical surface of the limiting ball (15) and the bottom wall of the ball bearing limiting groove (14), respectively. The limiting ball (15) can partially protrude from the ball bearing limiting groove (14) and engage with the ball bearing groove (13).

4. The fiber optic connector protective sleeve according to claim 1, characterized in that, The support assembly includes a telescopic guide sleeve (17) and a telescopic limiting rod (18) that is slidably connected along the axial direction of the telescopic guide sleeve (17); a hinge seat (19) is fixedly installed on the outer wall of the protective sleeve body (6), and one end of the telescopic guide sleeve (17) is hinged to the hinge seat (19); a support limiting ring (20) is fixedly installed on the end of the telescopic limiting rod (18) away from the telescopic guide sleeve (17), and the support limiting ring (20) is sleeved in the limiting ring groove (10) and can rotate circumferentially along the limiting ring groove (10).

5. The fiber optic connector protective sleeve according to claim 1, characterized in that, The four guide grooves (8) and the guide ring grooves (7) have a chamfer (21) at the insertion end, and the chamfer (21) is inclined to the inside of the guide groove (8).

6. The fiber optic connector protective sleeve according to claim 1, characterized in that, The outer walls of the protective sleeve body (6) and the protective cover (9) are evenly provided with several anti-slip textures (22) along the circumference.

7. The fiber optic connector protective sleeve according to claim 1, characterized in that, A circular anti-slip pad (23) is fixedly installed on the outer wall surface of the closed end of the protective cover (9), and the diameter of the anti-slip pad (23) is adapted to the outer diameter of the protective cover (9).

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