Anti-interference device of radio frequency cable

Abstract

The invention belongs to the technical field of cable shielding, and discloses an anti-interference device of a radio frequency cable, which comprises a protective shell, the top of the protective shell is fixedly connected with a top cover through a bolt, the side wall of the protective shell is fixedly connected with a plurality of control contacts and interface female joints, and through the cooperation of structures such as a rotating sleeve, a sealing sleeve, a spiral groove and a hook groove, the anti-interference device of the radio frequency cable is formed. During butt joint installation, a first sliding column and a second sliding column slide in a spiral groove and a hook groove at the same time, so that a rotating sleeve automatically rotates, a sealing sleeve in an inner cavity is driven to synchronously rotate, finally, the sealing sleeve spirally advances on the surface of a clamping sleeve, and therefore the friction force between the sealing sleeve and the surface of the clamping sleeve is reduced; the sealing sleeve is quickly sleeved and wrapped on the surface of the first sliding column to form a totally-closed waterproof interlayer, so that the waterproof performance of the joint is effectively improved, the friction anti-falling effect is formed through the surface layer of the sealing sleeve and the clamping sleeve, the wiring stability is ensured, and the situation that a power supply is unstable due to the loosening of the joint is avoided.

Description

Technical Field

[0001] This invention belongs to the field of cable shielding technology, specifically an anti-interference device for radio frequency cables. Background Technology

[0002] Radio frequency (RF) cables typically have a copper wire at their center that transmits signals. An inner conductor is wrapped in an insulating layer to fix the relative position of the inner and outer conductors. The outer conductor is usually a shielding layer, generally made of braided copper mesh, aluminum foil, or a combination of both. It serves as the signal return path and is responsible for shielding the internal signal from external interference, while also preventing the internal signal from leaking out and interfering with other devices. In RF test equipment or signal switching systems, RF relays are needed to switch the RF signal path to minimize signal reflection and loss.

[0003] The prior art document discloses a microwave radio frequency cable splicing device resistant to electromagnetic signal interference. It comprises a body with a processing table fixed to its top; a connecting shaft connected to the end of a motor; and includes: a movable cylinder fixedly sleeved on the outside of two connecting shafts, with a connecting rod movably connected to the top of the movable cylinder; a support plate fixed to the top of the connecting rod, with adjusting rods movably passing through both sides of the support plate, and a limit block fixedly connected to the end of each adjusting rod; and a support plate fixed to both sides of the limit frame, with support frames fixed to both sides of the support plate. The bottom of the connecting cylinder is connected to the movable rod. This microwave radio frequency cable splicing device resistant to electromagnetic signal interference uses an automatic splicing method for microwave radio frequency cables, ensuring both the accuracy of the splicing position and improving splicing efficiency. Furthermore, it can straighten and organize excess cable during splicing to prevent bent cables from affecting the splicing of the connectors. Although the above-mentioned device straightens and aligns the microwave RF lines to facilitate automatic connection, the RF relays have high requirements for power supply stability when the RF test equipment or signal switching is used. Therefore, it is usually necessary to ensure power supply stability and avoid power fluctuations or voltage that are too high or too low during use, so as not to affect the RF relays. The stability of the connector connection can directly affect the transmission stability of electrical signals, so the connector design needs to be optimized. Summary of the Invention

[0004] To address the issue raised in the background art that the stability of connector mating directly affects the transmission stability of electrical signals, this invention provides an anti-interference device for radio frequency cables.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anti-interference device for radio frequency cables, comprising a protective shell, a top cover fixedly connected to the top of the protective shell by bolts, a plurality of control contacts and a female interface connector fixedly connected to the side wall of the protective shell, a female interface connector snap-fitted with a female interface connector, and a cable fixedly connected to the end of the female interface connector, further comprising: A double-layer sealing mechanism is located on the female interface head; A connector anti-breakage mechanism, which is connected to the interface head; The double-layer sealing mechanism and the connector anti-breakage mechanism are coupled to each other, which can tightly install the female and female connectors and support the connector of the cable. The protective shell serves as the main frame, providing the installation foundation and protection for all functional components. The control contacts on its side wall are used to connect external control signals or power. The top cover is fixed to the protective shell by bolts, forming a closed electromagnetic shielding cavity.

[0006] Preferably, the double-layer sealing mechanism includes a fixed sleeve fixed to the side wall of the interface female head, a rotating sleeve rotatably connected to the outer wall of the fixed sleeve, and a pair of balls rotatably connected to the end of the rotating sleeve.

[0007] Preferably, the fixed sleeve has symmetrical hook grooves on both sides, and the rotating sleeve has a spiral groove on its outer wall.

[0008] Preferably, a sealing sleeve is fixedly connected to the inner cavity of the rotating sleeve, and the end of the sealing sleeve extends out of the outside of the rotating sleeve.

[0009] Preferably, a rubber guide sleeve is fixedly connected to the inner cavity of the fixing sleeve, and the fixing sleeve is installed by snapping the rubber guide sleeve onto the interface head.

[0010] Preferably, the joint anti-breakage mechanism includes a joint outer sleeve that is movably sleeved on the outer wall of the rotating sleeve, and a second sliding post is fixedly connected to the inner edge of the joint outer sleeve, the second sliding post being slidably connected in the spiral groove.

[0011] Preferably, a snap-fit ​​sleeve is fixedly connected to the inner cavity of the connector sleeve. The snap-fit ​​sleeve is located between the fixed sleeve and the rotating sleeve. A pair of first sliding pins are fixedly connected to the inner side of the snap-fit ​​sleeve, and the first sliding pins are slidably connected in the hook groove. During installation, the first sliding pins first slide along the axial section of the hook groove to achieve preliminary guidance and alignment. When they reach the bend of the hook groove, the connector sleeve is slightly rotated to allow the first sliding pins to slide into the circumferential rotating section of the hook groove, thereby causing the entire connector sleeve and the snap-fit ​​sleeve inside to rotate at a certain angle. Finally, the connector head is slightly pulled back axially a short distance to allow the first sliding pins to be completely engaged in the locking recess at the end of the hook groove, completing the rigid connection and locking at the mechanical level, effectively preventing the connector from accidentally loosening due to vibration or pulling.

[0012] Preferably, a rubber ring is also fixedly attached to the inner cavity of the connector sleeve, and the rubber ring abuts against the end of the sealing sleeve. When the sealing sleeve reaches the end position, its end face makes tight end face compression contact with the rubber ring pre-installed at the root of the snap-fit ​​sleeve, and the two together form a double sealing barrier. The rubber ring undergoes elastic deformation after being compressed, fully filling the tiny gaps, thereby forming an almost completely sealed waterproof layer, which greatly improves the waterproof sealing performance of the connector in humid environments or even under short-term water immersion conditions.

[0013] Preferably, the end of the connector jacket has a cable sheath that slides through it, and the end of the cable sheath abuts against the ball bearings. As the rotating sleeve continues to rotate inside the connector jacket and moves towards the cable, its end eventually contacts the end face of the cable sheath and begins to apply axial thrust. This thrust pushes the cable sheath backward along the axial direction of the cable. During this movement, the ball bearings on the inner wall of the cable sheath effectively reduce the sliding friction between the cable sheath and the outer sheath of the cable, making the pushing action easy and preventing wear on the cable.

[0014] Preferably, a pair of annular plates are fixedly connected to the side of the cable sheath away from the connector sheath, and the annular plates are slidably fitted onto the outer wall of the cable by limiting rubber rings.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention enhances the stability of the connector joint by incorporating a rotating sleeve, a sealing sleeve, a spiral groove, and a hook groove. During installation, the first and second sliding posts slide simultaneously within the spiral and hook grooves, causing the outer sleeve of the connector to snap into place. The rotating sleeve also rotates automatically, causing the inner sealing sleeve to rotate synchronously. Combined with the axial advancement of the outer sleeve, the sealing sleeve spirals forward on the surface of the snap-fit ​​sleeve, reducing friction between them. This allows the sealing sleeve to quickly fit and wrap around the surface of the first sliding post, forming a fully enclosed waterproof layer. This not only effectively improves the waterproof performance of the connection but also creates a frictional anti-detachment effect between the surface of the sealing sleeve and the snap-fit ​​sleeve, ensuring stable wiring and preventing power instability caused by connector loosening.

[0016] This invention increases the straightening range of the cable by using a combination of structures such as ball bearings, cable sleeves, and limiting rubber rings. When the rotating sleeve rotates and moves forward inside the connector jacket, the ball bearings continuously squeeze the cable sleeve, causing it to move towards the cable. A pair of annular plates hold the limiting rubber ring against the outer wall of the cable, straightening the cable connector and preventing it from bending and breaking, thereby extending the cable's service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram showing the structural fit between the sealing sleeve and the snap-fit ​​sleeve of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at point A in the middle; Figure 5 This is a schematic diagram showing the structural fit between the rotating sleeve and the sealing sleeve of the present invention; Figure 6 This is a schematic diagram showing the structural fit between the cable sheath and the connector jacket of the present invention; Figure 7 This is a schematic diagram showing the structural fit between the second sliding post and the connector sleeve of the present invention; Figure 8 This is a schematic diagram showing the structural fit between the hook groove and the fixing sleeve of the present invention; Figure 9 This is a schematic diagram showing the structural fit between the first sliding post and the snap-fit ​​sleeve of the present invention.

[0018] In the picture: 1. Protective shell; 2. Control contact; 3. Top cover; 4. Interface female head; 5. Cable; 6. Double sealing mechanism; 601. Rotating sleeve; 602. Spiral groove; 603. Sealing sleeve; 604. Fixing sleeve; 605. Rubber guide sleeve; 606. Ball bearing; 607. Hook groove; 7. Connector anti-breakage mechanism; 701. Connector outer sleeve; 702. Snap-fit ​​sleeve; 703. First sliding post; 704. Second sliding post; 705. Rubber ring; 706. Cable protection sleeve; 707. Annular plate; 708. Limiting rubber ring; 8. Interface female head. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 9 As shown, the present invention provides an anti-interference device for radio frequency cables, including a protective shell 1, a top cover 3 fixedly connected to the top of the protective shell 1 by bolts, a plurality of control contacts 2 and an interface female head 4 fixedly connected to the side wall of the protective shell 1, an interface female head 8 snapped onto the interface female head 4, and a cable 5 fixedly connected to the end of the interface female head 8. The device also includes: Double-layer sealing mechanism 6 is located on the interface female head 4; The connector anti-breakage mechanism 7 is connected to the interface head 8; The double-layer sealing mechanism 6 and the connector anti-breakage mechanism 7 are coupled to each other, which can tightly install the female connector 4 and the female connector 8, and support the connector part of the cable 5.

[0021] The above scheme employs the following: The protective housing 1 serves as the main frame, providing the mounting base and protection for all functional components. Control contacts 2 on its side walls are used to connect external control signals or power supplies. The top cover 3 is bolted to the protective housing 1, forming a closed electromagnetic shielding cavity. The interface female connector 4 is fixedly mounted on the side wall of the protective housing 1. It acts as the gateway for external RF cables to enter the equipment. Its fixed connection to the protective housing 1 ensures the mechanical strength of the connection and guarantees good electrical continuity between the metal casing of the interface female connector 4 and the protective housing 1, maintaining the grounding and shielding integrity of the entire system.

[0022] like Figures 2 to 4 , Figure 8 As shown, the double-layer sealing mechanism 6 includes a fixed sleeve 604 fixed to the side wall of the interface female head 4. A rotating sleeve 601 is rotatably connected to the outer wall of the fixed sleeve 604. A pair of balls 606 are rotatably connected to the end of the rotating sleeve 601. Hook grooves 607 are symmetrically opened on both sides of the fixed sleeve 604. A spiral groove 602 is opened on the outer wall of the rotating sleeve 601. A sealing sleeve 603 is fixed to the inner cavity of the rotating sleeve 601. The end of the sealing sleeve 603 extends out of the outside of the rotating sleeve 601. A rubber guide sleeve 605 is fixed to the inner cavity of the fixed sleeve 604. The fixed sleeve 604 is snapped into the interface female head 8 through the rubber guide sleeve 605.

[0023] Using the above method: When installing the female connector 4 and the female connector 8, the front end of the female connector 8 should be carefully aligned with the center hole of the rubber guide sleeve 605 to ensure that the first sliding post 703 is accurately embedded in the initial sliding section of the hook groove 607, while aligning the second sliding post 704 with the entrance of the spiral groove 602 on the outer wall of the rotating sleeve 601. Then, the female connector 8 is smoothly pushed axially into the female connector 4. During this process, the first sliding column 703 first slides along the axial section of the hook groove 607 to achieve initial guidance and alignment. When it reaches the turning point of the hook groove 607, the first sliding column 703 slides into the circumferential rotating section of the hook groove 607 by slightly rotating the connector sleeve 701, thereby causing the entire connector sleeve 701 and the internal snap-fit ​​sleeve 702 to rotate at a certain angle. Finally, the connector head 8 is pulled back axially a short distance to make the first sliding column 703 completely snap into the locking recess at the end of the hook groove 607, completing the rigid connection and locking at the mechanical level, effectively preventing the connector from accidentally loosening due to vibration or pulling. Meanwhile, during axial advancement and rotation, the second sliding pin 704 remains in contact with the spiral groove 602 and applies lateral pressure. Since the connector sleeve 701 is axially limited by the first sliding pin 703, which has entered the rotating section of the hook groove 607, when the second sliding pin 704 presses against the inclined surface of the spiral groove 602, its reaction force is converted into rotational torque, driving the rotating sleeve 601 to rotate around its axis. When the connector sleeve 701 rotates on its own due to the guidance of the first sliding pin 703, the engagement between the second sliding pin 704 and the spiral groove 602 smoothly drives the rotating sleeve 601 to rotate synchronously, avoiding motion interference and ensuring smooth operation.

[0024] like Figures 3 to 7 , Figure 9 As shown, the connector anti-breakage mechanism 7 includes a connector outer sleeve 701 that is movably sleeved on the outer wall of the rotating sleeve 601. A second sliding post 704 is fixedly connected to the inner edge of the connector outer sleeve 701, and the second sliding post 704 is slidably connected in the spiral groove 602. A snap-fit ​​sleeve 702 is fixedly connected to the inner cavity of the connector outer sleeve 701. The snap-fit ​​sleeve 702 is located between the fixed sleeve 604 and the rotating sleeve 601. A pair of first sliding posts 703 are fixedly connected to the inner side of the snap-fit ​​sleeve 702, and the first sliding posts 703 are slidably connected in the hook groove 607.

[0025] like Figure 7 As shown, a rubber ring 705 is also fixedly connected to the inner cavity of the connector sleeve 701, and the rubber ring 705 abuts against the end of the sealing sleeve 603; a cable protection sleeve 706 slides through the end of the connector sleeve 701, and the end of the cable protection sleeve 706 abuts against the ball 606; a pair of annular plates 707 are fixedly connected to the side of the cable protection sleeve 706 away from the connector sleeve 701, and the annular plates 707 are slidably sleeved on the outer wall of the cable 5 by a limiting rubber ring 708.

[0026] Using the above scheme: When the rotating sleeve 601 rotates, it drives the internal sealing sleeve 603 to rotate as well. Simultaneously, with the axial advancement of the connector outer sleeve 701, this rotational motion causes the sealing sleeve 603 to spiral forward relative to the surface of the snap-fit ​​sleeve 702. This combined rotational and axial motion transforms the traditional axial sliding friction into a friction form combining rolling and sliding, significantly reducing the frictional resistance during the fitting process of the sealing sleeve 603. This not only allows the sealing sleeve 603 to advance quickly and smoothly, ultimately tightly fitting and wrapping around the designed sealing section surface of the snap-fit ​​sleeve 702, but also reduces the wear of the sealing element and improves its service life. When the sealing sleeve 603 reaches its final position, its end face makes tight end-face compression contact with the rubber ring 705 pre-installed at the root of the snap-fit ​​sleeve 702, and the two together form a double sealing barrier. The rubber ring 705 undergoes elastic deformation under pressure, fully filling the tiny gaps, thus forming an almost completely sealed waterproof layer, greatly improving the connector's waterproof sealing performance in humid environments and even under brief immersion conditions. Furthermore, the sealing sleeve 603, tightly wrapped around the surface of the snap-fit ​​sleeve 702, generates a large static friction force between its inner wall and the surface of the snap-fit ​​sleeve 702. This friction force provides an additional significant anti-torsion and anti-axial pull-out mechanical locking force, further enhancing the mechanical stability of the connection between the male connector 8 and the female connector 4. The cable sheath 706 uses a pair of annular plates 707 to clamp and compress a limiting rubber ring 708. This limiting rubber ring 708 is tightly fitted onto the upper limit of the outer sheath of the cable 5. The rearward movement of the cable sheath 706 increases the effective support distance between it and the housing of the connector 8, effectively straightening the cable 5 segment that is prone to bending at the joint root and maintaining it on a gentler curve. This alleviates stress concentration at the joint area and effectively prevents fatigue cracking of the outer insulation or breakage of the internal copper conductors due to long-term repeated bending of the cable 5, thus significantly extending the overall service life of the cable 5 in dynamic application environments.

[0027] Working principle and usage process of this invention: First, when installing the female connector 4 and the female connector 8, align the female connector 8 with the rubber guide sleeve 605, the first sliding pin 703 with the hook groove 607, and the second sliding pin 704 with the spiral groove 602. Then, push the female connector 8 into the female connector 4 as a whole. During this process, the first sliding pin 703 moves axially along the hook groove 607, then rotates along the outer wall of the fixed sleeve 604, and then pulls back a small distance to lock the first sliding pin 703 at the end of the hook groove 607, completing the installation. At the same time, the second sliding pin 704 presses the spiral groove 602 on the outer wall of the rotating sleeve 601. Since the connector sleeve 701 is axially limited by the first sliding pin 703 on the locking sleeve 702, the rotating sleeve 601 is squeezed and rotated. When the connector sleeve 701 rotates along the first sliding pin 703, the second sliding pin 704 can drive the rotating sleeve 601 to rotate as well, without hindering the movement of the device. When the rotating sleeve 601 rotates, it can drive the sealing sleeve 603 inside its cavity to rotate synchronously. In conjunction with the axial advancement of the connector outer sleeve 701, the sealing sleeve 603 spirals forward on the surface of the snap-fit ​​sleeve 702, thereby reducing the friction between the sealing sleeve 603 and the surface of the snap-fit ​​sleeve 702. This allows the sealing sleeve 603 to quickly fit and wrap around the surface of the first sliding column 703. When the sealing sleeve 603 reaches the bottom, it also abuts against the rubber ring 705, forming a fully sealed waterproof barrier. This not only effectively improves the waterproof performance of the connection, but also enhances the stability of the connector 8 connection by creating a frictional anti-detachment effect between the surface of the sealing sleeve 603 and the snap-fit ​​sleeve 702. As the rotating sleeve 601 rotates and moves forward within the connector sleeve 701, it continuously compresses the protective sleeve 706 towards the cable 5, effectively reducing friction through the ball bearings 606. The protective sleeve 706 uses a pair of annular plates 707 to hold the limiting rubber ring 708 against the outer wall of the cable 5, straightening the connector of the cable 5. Furthermore, the movement of the protective sleeve 706 increases the straightening range, thus preventing the internal copper wires from being exposed or broken due to prolonged bending of the cable 5, and extending the service life of the cable 5.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-interference device for radio frequency cables, comprising a protective shell (1), a top cover (3) fixedly connected to the top of the protective shell (1) by bolts, a plurality of control contacts (2) and an interface female head (4) fixedly connected to the side wall of the protective shell (1), an interface female head (8) being snapped onto the interface female head (4), and a cable (5) fixedly connected to the end of the interface female head (8), characterized in that: Also includes: A double-layer sealing mechanism (6) is located on the interface female head (4); A connector anti-breakage mechanism (7) is connected to the interface sub-head (8); The double-layer sealing mechanism (6) and the connector anti-breakage mechanism (7) are coupled to each other, which can tightly install the interface female head (4) and the interface female head (8) and support the connector part of the cable (5).

2. The anti-interference device for radio frequency cables according to claim 1, characterized in that: The double-layer sealing mechanism (6) includes a fixed sleeve (604) fixed to the side wall of the interface female head (4), a rotating sleeve (601) is rotatably connected to the outer wall of the fixed sleeve (604), and a pair of balls (606) are rotatably connected to the end of the rotating sleeve (601).

3. The anti-interference device for radio frequency cables according to claim 2, characterized in that: The fixed sleeve (604) has symmetrical hook grooves (607) on both sides, and the outer wall of the rotating sleeve (601) has a spiral groove (602).

4. The anti-interference device for radio frequency cables according to claim 3, characterized in that: A sealing sleeve (603) is fixedly connected to the inner cavity of the rotating sleeve (601), and the end of the sealing sleeve (603) extends out of the outside of the rotating sleeve (601).

5. The anti-interference device for radio frequency cables according to claim 4, characterized in that: The inner cavity of the fixed sleeve (604) is fixedly connected to a rubber guide sleeve (605), and the fixed sleeve (604) is snapped into the interface head (8) through the rubber guide sleeve (605).

6. The anti-interference device for radio frequency cables according to claim 5, characterized in that: The joint anti-breakage mechanism (7) includes a joint outer sleeve (701) that is movably sleeved on the outer wall of the rotating sleeve (601). The inner edge of the joint outer sleeve (701) is fixedly connected to a second sliding post (704), which is slidably connected in the spiral groove (602).

7. The anti-interference device for radio frequency cables according to claim 6, characterized in that: The inner cavity of the connector sleeve (701) is fixedly connected to a snap-fit ​​sleeve (702), which is located between the fixed sleeve (604) and the rotating sleeve (601). A pair of first sliding pins (703) are fixedly connected to the inner side of the snap-fit ​​sleeve (702), and the first sliding pins (703) are slidably connected in the hook groove (607).

8. The anti-interference device for radio frequency cables according to claim 7, characterized in that: The inner cavity of the connector sleeve (701) is also fixed with a rubber ring (705), which abuts against the end of the sealing sleeve (603).

9. The anti-interference device for radio frequency cables according to claim 8, characterized in that: The end of the connector jacket (701) is slidably penetrated by the wire sheath (706), and the end of the wire sheath (706) abuts against the ball (606).

10. The anti-interference device for radio frequency cables according to claim 9, characterized in that: A pair of annular plates (707) are fixedly connected to the side of the cable sleeve (706) away from the connector sleeve (701), and the annular plates (707) are slidably sleeved on the outer wall of the cable (5) by a limiting rubber ring (708).

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