Cable anti-pinch structure of vehicle-mounted antenna

Abstract

The utility model discloses a cable anti-pinch structure of a vehicle-mounted antenna, and relates to the technical field of vehicle-mounted antennae, the cable anti-pinch structure comprises a flange plate, a stepped shaft, a drum-shaped spring and a sleeve, the flange plate is arranged on a radio frequency cable in a penetrating manner; the stepped shaft is arranged on one side, opposite to the flange plate, of the radio frequency cable in a penetrating manner; the drum-shaped spring is arranged on the radio frequency cable in a penetrating manner, one end of the drum-shaped spring is clamped on the flange plate, and the other end of the drum-shaped spring is clamped on the stepped shaft; the sleeve is suitable for being arranged on a cable, located between the flange plate and the stepped shaft, of the radio frequency cable in a sleeving mode. According to the cable anti-pinch structure, the accident that the radio frequency cable is pinched off by the opening gap of the drum-shaped spring when the drum-shaped spring is bent by more than 90 degrees under the abnormal condition of the vehicle-mounted antenna can be avoided, and the failure of the antenna is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted antennas, and more particularly to a cable anti-pinching structure of a vehicle-mounted antenna. Background Art

[0002] Currently, the base of a typical vehicle-mounted antenna contains a drum-shaped spring buffer. A small-diameter RF cable runs through the center of the drum spring for RF signal transmission. This requires that the spring bends within a 90° range without damaging the antenna. To address this, the conventional approach is to rationally design the RF cable length to ensure that it is not pinched or severed when the spring bends within a ±90° range.

[0003] However, when the vehicle is traveling too fast or the road conditions are bad, the spring is very likely to bend more than 90 degrees. At this time, the stretching opening gap of the spring is too large, and the internal RF cable is bent into a sharp angle and pushed up from the spring opening, and even enters the spring gap. Then, at the moment of spring rebound, the cable rebounds relatively slowly, making the RF cable very easy to be clamped by the spring gap. Over time, the cable at the bend of the spring will be repeatedly clamped, and under the clamping force of the instantaneous rebound force many times, the cable is very likely to be clamped and broken. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a cable anti-pinch structure for a vehicle-mounted antenna, so as to solve the technical problem that the existing solution easily causes the cable to be pinched and broken.

[0005] To achieve the above object, the present invention provides a cable anti-pinch structure for a vehicle-mounted antenna, the cable anti-pinch structure comprising:

[0006] A flange is provided on the radio frequency cable;

[0007] a stepped shaft, passing through a side of the radio frequency cable opposite to the flange;

[0008] a drum-shaped spring, which is passed through the radio frequency cable, and one end of the drum-shaped spring is clamped on the flange, and the other end is clamped on the stepped shaft;

[0009] The sleeve is suitable for being sleeved on the radio frequency cable between the flange and the stepped shaft.

[0010] Preferably, the flange plate includes a flange end and a flange column coaxially connected in sequence, and the centers of the flange column and the flange end are successively provided with a first axial hole and a second axial hole that are interconnected, and the outer diameter of the flange column gradually increases in the direction away from the flange end, and one side of the drum spring is suitable for matching and connecting with the outer surface of the flange column.

[0011] Preferably, the stepped shaft includes a first shaft segment, a second shaft segment and a third shaft segment coaxially connected in sequence, and a third shaft hole is opened at the center of the stepped shaft. One side of the radio frequency cable is suitable for being inserted into the third shaft hole. The outer diameter of the first shaft segment gradually increases in the direction away from the second shaft segment, so that the other side of the drum spring is suitable for matching and connecting with the outer surface of the first shaft segment.

[0012] Preferably, the drum spring is a drum-shaped structure that is large in the middle and small at both ends.

[0013] Preferably, the RF cable includes a cable and a connector connected to one end of the cable, and the connector is suitable for being inserted into the third axial hole of the stepped shaft, and the end of the cable away from the connector is suitable for passing through the third axial hole, the first axial hole and the second axial hole in sequence.

[0014] Preferably, a plurality of screw holes are evenly distributed on the outer circumference of the second shaft segment and are perpendicular to the central axis of the third shaft hole. The screw holes are connected with locking members suitable for positioning the connector in the third shaft hole.

[0015] Preferably, the locking member is a bolt.

[0016] Preferably, there are three screw holes, and the three screw holes are evenly distributed on the outer circumference of the second shaft segment.

[0017] Preferably, a plurality of evenly distributed mounting holes are provided on the flange end, and the flange plate is suitable for being fixedly connected to corresponding positions of the vehicle through the mounting holes.

[0018] Preferably, an external thread is provided on the outer circumference of the third shaft segment, and the stepped shaft is suitable for being threadedly connected to the antenna whip body through the external thread.

[0019] Compared with the prior art, the present invention has the following advantages and effects:

[0020] 1. The cable anti-pinch structure of the vehicle-mounted antenna in the utility model is composed of a flange, a stepped shaft, a drum spring and a sleeve, wherein the flange and the stepped shaft are respectively passed through both sides of the radio frequency cable, and the drum spring is clamped on the flange and the stepped shaft. This design can provide a buffer when the cable is subjected to axial pressure, preventing the cable from being pinched or damaged; the design of the flange and the stepped shaft provides two stable fixing points, so that the radio frequency cable will not shift due to vibration or bumps during vehicle driving, ensuring the stability of the cable and the continuity of signal transmission; the variable stiffness characteristics of the drum spring enable it to provide appropriate elastic support when the cable is squeezed, absorb impact force, and reduce direct damage to the cable; the sleeve is arranged on the part of the radio frequency cable between the flange and the stepped shaft, and prevents pinching by increasing the bending radius, providing an additional layer of protection for the cable; even when the antenna is swinging violently, the cable will not be squeezed out from the gap opening of the drum spring, and will not be clamped by the spring.

[0021] 2. The anti-pinch structure can prevent the drum spring from bending more than 90 degrees under abnormal circumstances and prevent the gap of the drum spring from clamping the RF cable, thereby causing the antenna to fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the assembly structure of the cable anti-pinch structure of the vehicle-mounted antenna in an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1-flange; 11-flange end; 111-mounting hole; 12-flange column; 121-first shaft hole; 122-second shaft hole;

[0025] 2-stepped shaft; 21-first shaft section; 22-second shaft section; 221-screw hole; 23-third shaft section; 231-external thread; 24-third shaft hole; 25-bolt;

[0026] 3-RF cable; 31-connector; 32-cable;

[0027] 4-drum spring;

[0028] 5-Casing. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal connections between two components; they may refer to wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] An antenna is a converter device that converts electrical signals into magnetic signals (transmission) or receives magnetic signals into electrical signals (reception). Anything that uses electromagnetic waves to transmit information must rely on antennas to work, so antennas are of great significance in the communications industry.

[0032] Vehicle-mounted antennas are a widely used type of antenna. Typically, they consist of a base and a whip. The base connects to the whip and matches standing waves, while the whip primarily radiates signals.

[0033] In actual applications, vehicle-mounted antennas are often installed outside the vehicle body. When the vehicle is used in a relatively harsh environment, the vehicle-mounted antenna is very easy to be damaged. The damage to the vehicle-mounted antenna is often the deformation or damage of the whip body. Once the above situation occurs, the antenna will basically lose its original function and vehicle communication will be greatly restricted.

[0034] Currently, in order to prevent the RF cable from being broken by the spring, the conventional approach is to reasonably design the length of the RF cable to ensure that the RF cable is not broken or pulled apart when the spring is bent within the range of ±90°.

[0035] However, when the vehicle is traveling too fast or the road conditions are bad, the spring is prone to bending more than 90 degrees. At this time, the stretched opening gap of the spring is too large, and the internal RF cable is bent into a sharp angle and pushed toward the opening gap of the spring, or even enters the opening gap of the spring. The spring then rebounds instantaneously, while the cable rebounds relatively slowly, causing the RF cable to be pinched off by the spring gap.

[0036] To solve the above technical problems, please refer to Figure 1 As shown, the embodiment of the present invention provides a cable anti-pinch structure for a vehicle-mounted antenna, the cable anti-pinch structure comprising a flange 1, a stepped shaft 2, a drum spring 4 and a sleeve 5, wherein:

[0037] The flange 1 is passed through the RF cable 3; the stepped shaft 2 is passed through the other side of the RF cable 3 relative to the flange 1; the drum spring 4 is passed through the RF cable 3, and one end of the drum spring 4 is clamped on the flange 1, and the other end is clamped on the stepped shaft 2; the sleeve 5 is suitable for being sleeved on the cable 32 of the RF cable 3 located between the flange 1 and the stepped shaft 2.

[0038] Specifically in this embodiment, the flange 1 and the stepped shaft 2 are respectively inserted on both sides of the RF cable 3, and the drum spring 4 is clamped on the flange 1 and the stepped shaft 2. This design can provide a buffer when the cable is subjected to axial pressure to prevent the cable from being pinched or damaged; the design of the flange 1 and the stepped shaft 2 provides two stable fixing points, so that the RF cable 3 will not shift due to vibration or bumps during the driving of the vehicle, thereby ensuring the stability of the cable and the continuity of signal transmission; the variable stiffness characteristics of the drum spring 4 enable it to provide appropriate elastic support when the cable 32 is squeezed, absorb impact force, and reduce direct damage to the cable 32; the sleeve 5 is sleeved on the part of the RF cable 3 between the flange 1 and the stepped shaft 2, and prevents pinching by increasing the bending radius, providing an additional layer of protection for the cable 32; even when the antenna is swinging violently, the cable 32 will not be squeezed out from the gap opening of the drum spring 4, and will not be pinched by the spring.

[0039] It should be pointed out that in this embodiment, the sleeve 5 is preferably made of silicone material. The silicone material has strong resistance to compression deformation and can quickly return to its original shape after compression. This feature ensures that the sleeve will not be permanently deformed when subjected to external force, thereby maintaining a good protection effect; in addition, the silicone material has excellent high and low temperature resistance, so that the sleeve 5 can still effectively protect the RF cable 3 in extreme environments and ensure its normal operation.

[0040] In this embodiment, the length of the sleeve 5 is selected to be about 100 mm and the diameter is 6 mm, which can increase the minimum bending radius of the cable 32 from 13 mm to 22 mm (larger than the opening gap of 15 mm when the drum spring 4 is bent 120°). Therefore, even when the antenna is swinging violently, the cable 32 will not be squeezed out from the gap opening of the drum spring 4, and will not be clamped by the drum spring 4.

[0041] Therefore, the design of the entire cable anti-pinch structure improves the reliability of the vehicle antenna system. Through the reliability design of the mechanical structure, it ensures stable signal transmission even in harsh environments.

[0042] For further information, see Figure 1As shown, the flange plate 1 includes a flange end 11 and a flange column 12 coaxially connected in sequence. The centers of the flange column 12 and the flange end 11 are successively provided with a first axial hole 121 and a second axial hole 122 that are interconnected, and the outer diameter of the flange column 12 gradually increases in the direction away from the flange end 11. One side of the drum spring 4 is suitable for matching and connecting with the outer surface of the flange column 12.

[0043] In this embodiment, the flange 1 is composed of a flange end 11 and a flange column 12 coaxially connected in sequence. A first axial hole 121 and a second axial hole 122 are defined in the center of the flange 1. These interconnected axial holes allow for connection via a shaft or other mechanical components. The outer diameter of the flange column 12 gradually increases as it moves away from the flange end 11. This design enhances the strength and stability of the flange 1 while providing a suitable connection interface for the drum spring 4.

[0044] One side of the drum spring 4 is matched and connected with the outer surface of the flange column 12, so that the drum spring 4 can be tightly matched with the flange column 12, providing a good connection effect.

[0045] Thus, the drum spring 4 can provide different supporting forces according to changes in the load, which helps to absorb vibration and impact, prevent loosening under vibration or impact, and thus ensure the reliability of the connection.

[0046] For further information, see Figure 1 As shown, the stepped shaft 2 includes a first shaft segment 21, a second shaft segment 22 and a third shaft segment 23 coaxially connected in sequence, and a third shaft hole 24 is opened at the center of the stepped shaft 2. One side of the radio frequency cable 3 is suitable for passing through the third shaft hole 24. The outer diameter of the first shaft segment 21 gradually increases in the direction away from the second shaft segment 22, so that the other side of the drum spring 4 is suitable for matching and connecting with the outer surface of the first shaft segment 21.

[0047] Specifically in this embodiment, the stepped shaft 2 can provide different support and connection functions in different application scenarios. The gradient design of the first shaft segment 21 can provide better structural stability and adaptability, while providing a suitable connection interface for the drum spring 4.

[0048] As a result, while ensuring the connection strength, it can also effectively absorb and isolate vibrations, improving the reliability and durability of the entire system.

[0049] For further information, see Figure 1 As shown, the drum spring 4 is a drum-shaped structure with a large center and small ends, which makes the drum spring 4 take up less space when compressed, and is particularly suitable for applications with limited space.

[0050] For further information, see Figure 1As shown, the RF cable 3 includes a cable 32 and a connector 31. The connector 31 is connected to one end of the cable 32, and the connector 31 is suitable for being inserted into the third axial hole 24 of the stepped shaft 2. The end of the cable 32 away from the connector 31 is suitable for passing through the third axial hole 24, the first axial hole 121 and the second axial hole 122 in sequence.

[0051] Specifically, in this embodiment, RF cable 3 is connected to cable 32 via connector 31, achieving effective transmission of RF signals. Furthermore, flange 1 and stepped shaft 2 provide a stable signal transmission path for RF cable 3, reducing signal loss during transmission.

[0052] For further information, see Figure 1 As shown, a plurality of screw holes 221 are evenly distributed on the outer circumference of the second shaft section 22 and are perpendicular to the central axis of the third shaft hole 24 . The screw holes 221 are connected to locking members suitable for positioning the connector 31 in the third shaft hole 24 .

[0053] Therefore, by positioning the connector 31 of the RF cable 3 in the third axial hole 24 and fixing it with a locking member, the cable can be protected from external environmental influences such as dust and humidity, thereby ensuring signal quality and system stability.

[0054] For further information, see Figure 1 As shown, the locking member is a bolt 25. Bolt 25 is a common fastener with relatively low cost and is easy to obtain and replace. While ensuring connection reliability, cost-effectiveness is also taken into consideration, making the entire structure more economical and practical.

[0055] For further information, see Figure 1 As shown, there are three screw holes 221 , and the three screw holes 221 are evenly distributed on the outer circumference of the second shaft segment 22 .

[0056] Thus, bolts 25, acting as locking elements, provide sufficient preload to prevent loosening due to vibration. The essence of threaded connections is to prevent the screw pair from rotating relative to each other under load, which could cause the threaded connection to loosen. The three evenly distributed bolts 25 provide a uniform preload, thereby improving the anti-loosening performance.

[0057] For further information, see Figure 1 As shown, a plurality of evenly distributed mounting holes 111 are provided on the flange end 11 , and the flange plate 1 is suitable for being fixedly connected to a corresponding position of the vehicle through the mounting holes 111 .

[0058] Specifically, the uniform distribution of the mounting holes 111 helps ensure uniform installation torque of the flange 1 on the vehicle, thereby improving the stability and structural symmetry of the flange 1. This helps reduce rotation or offset caused by unbalanced torque and ensures the reliability of the flange 1 during use.

[0059] For further information, see Figure 1 As shown, the outer circumference of the third shaft segment 23 is provided with external threads 231, and the stepped shaft 2 is adapted to be threadedly connected to the antenna whip via external threads 231. Thus, external threads 231 facilitate assembly and maintenance. When connecting components need to be replaced or maintained, simply loosen or tighten the corresponding threaded connection, significantly reducing maintenance time and costs.

[0060] Although the utility model is disclosed as above, the scope of protection of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of protection of the utility model.

Claims

1. A cable anti-pinch structure for a vehicle-mounted antenna, characterized in that: include: A flange (1) is passed through the radio frequency cable (3); a stepped shaft (2) passing through a side of the radio frequency cable (3) opposite to the flange (1); A drum spring (4) is inserted into the radio frequency cable (3), and one end of the drum spring (4) is clamped on the flange (1), and the other end is clamped on the stepped shaft (2); The sleeve (5) is suitable for being sleeved on the cable (32) of the radio frequency cable (3) located between the flange (1) and the stepped shaft (2).

2. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 1, characterized in that: The flange plate (1) includes a flange end (11) and a flange column (12) connected coaxially in sequence, wherein the centers of the flange column (12) and the flange end (11) are sequentially provided with a first axial hole (121) and a second axial hole (122) that are interconnected, and the outer diameter of the flange column (12) gradually increases in a direction away from the flange end (11), and one side of the drum spring (4) is suitable for matching and connecting with the outer surface of the flange column (12).

3. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 2, characterized in that: The stepped shaft (2) comprises a first shaft section (21), a second shaft section (22) and a third shaft section (23) which are coaxially connected in sequence, and a third shaft hole (24) is provided at the center of the stepped shaft (2). One side of the radio frequency cable (3) is adapted to be inserted into the third shaft hole (24). The outer diameter of the first shaft section (21) gradually increases in a direction away from the second shaft section (22), so that the other side of the drum spring (4) is adapted to be matched and connected with the outer surface of the first shaft section (21).

4. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 1, characterized in that: The drum-shaped spring (4) is a drum-shaped structure with a large middle portion and small ends.

5. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 3, characterized in that: The radio frequency cable (3) comprises a cable (32) and a connector (31) connected to one end of the cable (32), and the connector (31) is suitable for being inserted into the third axial hole (24) of the stepped shaft (2), and the end of the cable (32) away from the connector (31) is suitable for passing through the third axial hole (24), the first axial hole (121) and the second axial hole (122) in sequence.

6. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 5, characterized in that: A plurality of screw holes (221) are evenly distributed on the outer circumference of the second shaft section (22) and are arranged along a direction perpendicular to the central axis of the third shaft hole (24). A locking member suitable for positioning the connector (31) in the third shaft hole (24) is connected to the screw hole (221).

7. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 6, characterized in that: The locking member is a bolt (25).

8. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 6, characterized in that: There are three screw holes (221), and the three screw holes (221) are evenly distributed on the outer circumference of the second shaft section (22).

9. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 2, characterized in that: A plurality of evenly distributed mounting holes (111) are provided on the flange end (11), and the flange plate (1) is suitable for being fixedly connected to corresponding positions of the vehicle through the mounting holes (111).

10. The cable anti-pinch structure of the vehicle-mounted antenna according to claim 3, characterized in that: An external thread (231) is provided on the outer circumference of the third shaft section (23), and the stepped shaft (2) is suitable for being threadably connected to the antenna whip body via the external thread (231).

Images