A coaxial cable connector

Abstract

The utility model discloses a kind of coaxial cable connectors, including insulating body, the connecting terminal assembled in insulating body and the shielding shell wrapped in insulating body;Connecting terminal includes the base body part of plate shape and the mounting portion connected with base body part, the plurality of contact springs is extended with in the side end of base body part upwards, at least one side of each contact spring extends with sub-spring, the plurality of contact springs and sub-spring are enclosed into the plug-in cavity of upper end opening together.The utility model obtains longer elastic force arm by the sub-spring of side extension, can be closely attached with butt terminal, forms multiple-point reliable contact, while the plug-in cavity enclosed can enhance electromagnetic shielding effect, overall structure is compact, assembly is convenient, effectively improve the contact stability and radio frequency signal transmission quality of connector.

Description

Technical Field

[0001] This utility model belongs to the field of radio frequency connector technology, and in particular relates to a coaxial cable connector. Background Technology

[0002] Coaxial cable connectors are widely used for signal transmission between electronic devices, especially in the radio frequency (RF) field. Existing coaxial cable connectors typically consist of an insulating body, terminals housed within the insulating body, and an outer shielding shell. The terminals generally contact the terminals of the mating plug via tabs.

[0003] However, traditional contact terminals often use symmetrical double springs or open claw-shaped structures. During the insertion and removal process with the mating terminal, the springs are prone to lateral displacement or plastic deformation, resulting in poor contact and signal transmission interruption. Furthermore, due to the lack of an effective surrounding structure at the contact point, impedance discontinuities are easily formed in the insertion area, and external electromagnetic interference is easily intruded. At the same time, internal signals are also prone to radiating and leaking outward, affecting high-frequency transmission performance.

[0004] Therefore, it is necessary to design a new type of coaxial cable connector to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a coaxial cable connector that improves the reliability of the insertion contact and the signal shielding performance by adding a secondary spring on the side of the contact spring and forming an upper open insertion cavity together, while optimizing the structural strength and assembly stability.

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

[0007] A coaxial cable connector includes an insulating body, a connecting terminal assembled within the insulating body, and a shielding shell enclosing the insulating body. The connecting terminal includes a plate-shaped base portion and a mounting portion connected to the base portion. A plurality of contact springs extend upward from the side end of the base portion, and a secondary spring extends from at least one side of each contact spring. The plurality of contact springs and the secondary springs together form a mating cavity with an opening at the upper end.

[0008] The auxiliary spring includes a connecting part and a contact part. The connecting part extends upward from one side of the contact spring after being bent at a preset angle, and the contact part is provided thereon.

[0009] Furthermore, the contact spring and the base are provided with a protrusion to enhance the connection strength; the mounting part is a hollow columnar structure for electrical connection with the core of the coaxial cable.

[0010] Furthermore, both the upper ends of the contact spring and the auxiliary spring are provided with outwardly inclined guide portions; the contact spring extends upward from the side end of the base portion and is inclined towards the center of the base portion.

[0011] Furthermore, the width of the contact spring is greater than the width of the contact portion.

[0012] Furthermore, a positioning hole is provided through the base portion, and a positioning post corresponding to the positioning hole is provided on the insulating body.

[0013] Furthermore, the base, mounting part, contact spring and auxiliary spring are integrally stamped and bent into a structure.

[0014] Furthermore, the upper end of the insulating body is provided with a flange portion, and a receiving groove is formed on the insulating body extending to the flange portion, the receiving groove being used to accommodate the connecting terminal; the height of the flange portion is greater than the height of the connecting terminal to protect the connecting terminal.

[0015] Furthermore, the lower end of the insulating body is provided with a bent portion, which can be bent and received in the receiving groove to fix the connecting terminal in the receiving groove.

[0016] Furthermore, the outer wall of the insulating body is provided with at least one limiting groove, and the inner wall of the shielding shell is provided with a limiting block that cooperates with the limiting groove.

[0017] Compared with existing technologies, the beneficial effects of this technology are:

[0018] 1. The upper open insertion cavity formed by the contact spring and the auxiliary spring together realizes multi-point contact and all-round wrapping of the mating terminals, effectively preventing lateral displacement during the insertion and removal process and ensuring the continuity of impedance; at the same time, since the auxiliary spring extends from the side end of the contact spring, its elastic lever arm is much larger than that of the contact spring, and its elastic deformation capability is stronger, so it can make closer contact with the mating terminals.

[0019] 2. The relatively enclosed cavity structure reduces signal radiation loss at the contact point. Combined with the shielding shell, it significantly improves the connector's anti-electromagnetic interference capability, making it particularly suitable for high-frequency signal transmission.

[0020] 3. The convex structure at the junction of the contact spring and the base enhances the connection strength between the spring and the base, preventing the root from breaking after repeated insertion and removal; the positioning post on the insulating body cooperates with the terminal positioning hole, and is fixed by the bending part at the bottom, so that the terminal is not easy to move during injection molding or assembly, resulting in high assembly efficiency and good anti-rotation and anti-detachment effects. Attached Figure Description

[0021] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the coaxial cable connector of this utility model;

[0023] Figure 2 This is an exploded view of the coaxial cable connector of this utility model;

[0024] Figure 3 This is a structural diagram of the connecting terminal in this utility model;

[0025] Figure 4 This is a cross-sectional view of the insulating body in this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Insulating body; 11. Positioning post; 12. Flange; 13. Receiving groove; 14. Bending part; 15. Limiting groove; 2. Connecting terminal; 21. Base part; 211. Positioning hole; 22. Mounting part; 23. Contact spring; 24. Secondary spring; 241. Connecting part; 242. Contact part; 25. Insertion cavity; 26. Protrusion; 27. Guide part; 3. Shielding shell; 31. Limiting block; 4. Coaxial cable. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] like Figures 1 to 4 As shown, this utility model provides a coaxial cable connector, which includes an insulating body 1, a connecting terminal 2 assembled inside the insulating body 1, and a shielding shell 3 sleeved on the outside of the insulating body 1 and enclosing the insulating body 1.

[0030] The connecting terminal 2 is integrally formed from a conductive metal sheet by stamping and bending. It includes a plate-shaped base portion 21, a mounting portion 22 connected to the base portion 21, and a plurality of contact springs 23 extending upward from the side end of the base portion 21. In this embodiment, the base portion 21 is rectangular, the mounting portion 22 extends horizontally from one side end of the base portion 21, and two contact springs 23 are respectively provided on two opposite sides of the base portion 21. Furthermore, when the two contact springs 23 extend upward, they are inclined towards the center of the base portion 21 to form an inwardly converging elastic clamping structure.

[0031] At least one side of each contact spring 23 extends a secondary spring 24. In this embodiment, a secondary spring 24 extends from either the left or right side of each contact spring 23. In other embodiments, the secondary spring 24 may also extend from the left and right sides of each contact spring 23 respectively, further improving the circumferential enclosure of the insertion cavity 25.

[0032] The auxiliary spring 24 further includes a connecting portion 241 and a contact portion 242. The connecting portion 241 extends upward from the side edge of the contact spring 23 after being bent at a preset angle, and the contact portion 242 is provided. The preset bending angle is usually 90 degrees to 135 degrees and can be adjusted according to the size of the insertion cavity 25, so that the contact portion 242 is located in the gap area between two adjacent contact springs 23. In this way, the contact portions 242 of the two contact springs 23 and the two auxiliary springs 24 together surround the central axis to form an insertion cavity 25 with an open top. There are only tiny process gaps in the circumference of the insertion cavity 25, and the whole is in a ring-shaped wrapping shape. When the mating terminal is inserted, these springs can uniformly and elastically abut against the outer circumferential surface of the mating terminal in the circumferential direction, providing reliable contact force and good electromagnetic shielding effect.

[0033] Meanwhile, since the secondary spring 24 extends from the side end of the contact spring 23, its elastic lever arm is much larger than that of the contact spring 23, giving the secondary spring 24 better flexibility and a longer effective deformation stroke. When the mating terminal is inserted and radial compression occurs, the secondary spring 24 can generate more elastic deformation, providing a more uniform clamping force and ensuring a tight fit with the outer wall of the mating terminal.

[0034] The width of the contact spring 23 is designed to be greater than that of the auxiliary spring 24 to ensure that the contact spring 23, as the main spring, provides sufficient clamping force, while the auxiliary spring 24, as an auxiliary spring, increases the contact points and fills the circumferential gaps. The upper end of each contact spring 23 and the upper end of the contact portion 242 of each auxiliary spring 24 are formed with outwardly inclined guide portions 27. All guide portions 27 together form a flared structure that is wider at the top and narrower at the bottom, which facilitates the alignment of the mating terminal and its smooth insertion into the insertion cavity 25, and avoids hard contact between the mating terminal and the top of the spring, thus preventing damage to the spring.

[0035] To further strengthen the root of the contact spring 23, at least one protrusion 26 is stamped at the junction of the contact spring 23 and the base 21. The protrusion 26 protrudes to the outside or inside of the contact spring 23 and acts as a reinforcing rib to disperse the bending stress during insertion and removal, effectively preventing the contact spring 23 from breaking at the root or undergoing permanent deformation after repeated insertion and removal.

[0036] The mounting part 22 has a hollow columnar structure for insertion and mating with the center core of the coaxial cable 4 and for fixing by welding or crimping. The base part 21 also has at least one positioning hole 211 through it. Correspondingly, the insulating body 1 is integrally provided with a positioning post 11. During assembly, the positioning post 11 is inserted into the positioning hole 211 to achieve precise positioning of the connecting terminal 2.

[0037] The insulating body 1 is injection molded from insulating material, and a flange 12 protrudes from its upper end. A receiving groove 13 is formed inside the insulating body 1, extending upwards to the flange 12 to accommodate the connecting terminal 2. The top height of the flange 12 is significantly greater than the highest point of the connecting terminal 2, so that the connecting terminal 2 is enclosed within the flange 12, thereby protecting the connecting terminal 2 from deformation or damage when the connector is not inserted or when subjected to external impact.

[0038] The lower end of the insulating body 1 is integrally formed with a bendable portion 14, which initially extends downwards in a sheet-like structure. After the connecting terminal 2 is inserted into the receiving groove 13, the bendable portion 14 is bent inwards and folded into the receiving groove 13, thereby pressing and fixing the connecting terminal 2 in the insulating body 1. The assembly process requires no additional fasteners, making it simple and reliable. In this embodiment, the positioning post 11 is provided on the bendable portion 14. During installation, the positioning hole 211 of the connecting terminal 2 is aligned with the positioning post 11, and they are snapped into the receiving groove 13 together to complete the fixing.

[0039] At least one limiting groove 15 is provided on the outer side wall of the insulating body 1, and a limiting block 31 is stamped at the corresponding position on the inner wall of the shielding shell 3. When the shielding shell 3 is fitted into the insulating body 1, the limiting block 31 is engaged in the limiting groove 15, so that the shielding shell 3 and the insulating body 1 are stably fastened together and prevented from loosening.

[0040] When assembling the connector of this utility model with the coaxial cable 4, the mounting part 22 of the connecting terminal 2 is first welded and fixed to the core of the coaxial cable 4, then the connecting terminal 2 is installed into the receiving groove 13 of the insulating body 1, and aligned with the positioning post 11 through the positioning hole 211. Then the connecting terminal 2 is fixed by bending and folding the bending part 14, and finally the shielding shell 3 is put on so that the limiting block 31 is snapped into the limiting groove 15, thus completing the assembly.

[0041] In use, the mating terminal is inserted from above the insertion cavity 25, guided by the guide part 27 and then enters the relatively closed insertion cavity 25. The contact spring 23 provides the main radial clamping force, and the auxiliary spring 24 generates more elastic deformation with its longer elastic lever arm, which fits tightly against the outer wall of the mating terminal. Together, they form a multi-point reliable contact to ensure stable transmission of radio frequency signals. The relatively closed insertion cavity 25, together with the external shielding shell 3, can form a complete electromagnetic shielding space, effectively reducing signal interference.

[0042] In summary, the coaxial cable connector of this utility model, by setting a secondary spring 24 and surrounding it with multiple contact springs 23 to form an upper-opening insertion cavity 25, not only significantly improves contact reliability but also effectively enhances shielding performance. At the same time, it has a compact structure, is easy to assemble, and has good industrial applicability.

[0043] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A coaxial cable connector, comprising an insulating body, connecting terminals assembled within the insulating body, and a shielding shell enclosing the insulating body, characterized in that, The connection terminal includes a plate-shaped base portion and a mounting portion connected to the base portion. A plurality of contact springs extend upward from the side end of the base portion. At least one side of each contact spring extends a secondary spring. The plurality of contact springs and the secondary springs together form a plug-in cavity with an opening at the upper end. The auxiliary spring includes a connecting part and a contact part. The connecting part extends upward from one side of the contact spring after being bent at a preset angle, and the contact part is provided thereon.

2. The coaxial cable connector according to claim 1, characterized in that, The contact spring is provided with a protrusion at the junction with the base to enhance the connection strength; the mounting part is a hollow columnar structure for electrical connection with the core of the coaxial cable.

3. The coaxial cable connector according to claim 1, characterized in that, Both the upper ends of the contact spring and the auxiliary spring are provided with outwardly inclined guide portions; the contact spring extends upward from the side end of the base portion and is inclined towards the center of the base portion.

4. The coaxial cable connector according to claim 1, characterized in that, The width of the contact spring is greater than the width of the contact portion.

5. The coaxial cable connector according to claim 1, characterized in that, The base portion is provided with a positioning hole, and the insulating body is provided with a positioning post that mates with the positioning hole.

6. The coaxial cable connector according to claim 1, characterized in that, The base, mounting part, contact spring and auxiliary spring are integrally stamped and bent into a structure.

7. The coaxial cable connector according to claim 1, characterized in that, The upper end of the insulating body is provided with a flange portion, and a receiving groove is provided on the insulating body that extends through the flange portion. The receiving groove is used to accommodate the connecting terminal. The height of the flange portion is greater than the height of the connecting terminal to protect the connecting terminal.

8. The coaxial cable connector according to claim 7, characterized in that, The lower end of the insulating body is provided with a bent portion, which can be bent and received in the receiving groove to fix the connecting terminal in the receiving groove.

9. The coaxial cable connector according to claim 1, characterized in that, The outer wall of the insulating body is provided with at least one limiting groove, and the inner wall of the shielding shell is provided with a limiting block that cooperates with the limiting groove.

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