A low PIM connector

Abstract

A low PIM connector, comprising a connector body, a locking side plate buckle and a riveting fixing structure, the riveting fixing structure is connected with the locking side plate buckle on the connector body; the riveting fixing structure comprises a metal guide pin and a metal torsion spring sleeved on the metal guide pin, the metal guide pin is riveted on the connector body, and the locking side plate buckle is rotatably connected with the metal guide pin; further comprising a non-metal isolator, the non-metal isolator is sleeved on the metal guide pin, and the metal torsion spring is sleeved outside the non-metal isolator. The utility model adopts the isolation structure to avoid the metal contact of the metal guide pin and the metal torsion spring, so as to solve the PIM problem in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of connectors, specifically relating to a low PIM connector. Background Technology

[0002] Outdoor connectors are frequently used in harsh environments, and even slight carelessness can lead to product failure. For example, pulling on the connector's tail cable can break the fragile optical fibers / wires inside the connector. Therefore, outdoor connectors need to be designed with a stable and reliable tensile-resistant structure to improve tensile strength and achieve reliable tensile function.

[0003] like Figure 1 , 2 As shown, in the commonly used tensile structure of connectors, a locking side plate buckle 2 is provided on the outside of the shell of the connector body 1 to lock with another matching connector 100 (such as a socket). This not only allows for convenient and quick unlocking and installation, but is also widely used due to its reliable locking and high tensile strength.

[0004] In existing connectors, the connection between the locking side plate buckle 2 and the connector body 1 is usually achieved by a metal guide pin 3 passing through a pre-drilled hole and a side plate buckle mounting hole on the connector body 1, and a torsion spring 4 is installed on the metal guide pin 3. To prevent the metal guide pin 3 from falling off, a blind hole 301 is usually drilled at the front end of the metal guide pin 3. After the metal guide pin 3 is installed in place, the blind hole 301 is enlarged into a tapered hole by riveting to achieve fixation.

[0005] The requirements for various indicators in the field of communication base stations are becoming increasingly stringent, and there are more and more scenarios requiring low PIM (Passive Intermodulation). However, in the above-mentioned locking side plate fastening structure, unreliable metal contact between the metal guide pin and the metal torsion spring can easily lead to PIM problems.

[0006] PIM problems are an undesirable situation because they can have the following adverse effects or harms:

[0007] (1) Interference signal transmission: The new frequency components generated by passive intermodulation may fall within the receiving frequency band of the system, causing interference to the useful signal;

[0008] (2) Reduced system performance: Passive intermodulation will reduce the signal-to-noise ratio of the system and reduce the dynamic range of the system, thereby limiting the range of signal strengths that the system can process and affecting the overall performance and efficiency of the system.

[0009] (3) It can cause interference between systems. In an environment where multiple systems coexist, passive intermodulation products may interfere with the normal operation of other systems and cause mutual interference between systems.

[0010] Therefore, given the adverse effects of PIM problems, it is necessary to find ways to reduce or avoid their occurrence in connector design. Utility Model Content

[0011] The purpose of this invention is to provide a low PIM connector. While maintaining the original locking side plate fastening structure, it adopts an isolation structure to avoid metal-to-metal contact between the metal guide pin and the metal torsion spring, thereby solving the PIM problem in the prior art.

[0012] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a low PIM connector, comprising a connector body, a locking side plate buckle, and a riveting fixing structure, wherein the riveting fixing structure rotatably connects the locking side plate buckle to the connector body; the riveting fixing structure includes a metal guide pin and a metal torsion spring sleeved on the metal guide pin, wherein the metal guide pin is riveted to the connector body, and the locking side plate buckle is rotatably connected to the metal guide pin; it also includes a non-metallic isolator, wherein the non-metallic isolator is sleeved on the metal guide pin, and the metal torsion spring is sleeved on the outside of the non-metallic isolator.

[0013] Its beneficial effects are: This utility model uses a non-metallic isolator to separate the metal guide pin and the metal torsion spring, avoiding metal contact between the two, and thus avoiding PIM problems caused by metal contact.

[0014] Furthermore, the outer surface of the non-metallic isolator is provided with a spiral groove, which extends spirally along the axial direction of the non-metallic isolator, and the spiral portion of the metal torsion spring is located within the spiral groove.

[0015] Its beneficial effect is that each turn of the helical part of the metal torsion spring is located in the helical groove, which can form an axial limit on the metal torsion spring, prevent the metal torsion spring from moving axially during use, and thus ensure reliable isolation from the metal guide pin.

[0016] Furthermore, the length of the non-metallic isolator is greater than the axial length of the metallic torsion spring.

[0017] Its beneficial effect is that it can further ensure reliable isolation between the metal torsion spring and the metal guide pin.

[0018] In one embodiment, the outer side of the connector housing of the connector body is provided with two parallel connector lugs spaced apart, and the connector lugs are provided with mounting through holes; the locking side plate is provided with two parallel locking buckle lugs spaced apart, and the locking buckle lugs are provided with assembly through holes; the metal guide pin passes through the mounting through holes and the assembly through holes to fasten the locking side plate to the connector housing.

[0019] Its beneficial effect is that it provides a specific method for connecting the locking side plate buckle to the connector body via a metal guide pin.

[0020] Alternatively, the distance between the outer sides of the two locking lugs is equal to the distance between the inner sides of the two connector lugs.

[0021] Its beneficial effect is that, during installation, the two locking buckle lugs are inserted between the two connector lugs, providing a more specific installation structure for the locking side plate buckle.

[0022] Furthermore, the two ends of the non-metallic isolator rest against the inner sides of the two locking lug plates.

[0023] Its beneficial effects are: to prevent axial movement of the non-metallic isolator and to ensure reliable isolation.

[0024] Furthermore, the diameter of the metal guide pin matches the diameter of the mounting through hole.

[0025] Its beneficial effect is to prevent the metal guide pin from wobbling after passing through the mounting hole.

[0026] Alternatively, the distance between the inner sides of the two locking lugs is equal to the distance between the outer sides of the two connector lugs.

[0027] Its beneficial effect is that, during installation, the two connector lugs are inserted between the two locking buckle lugs, providing another more specific installation structure for the installation of the locking side plate buckle.

[0028] Furthermore, the two ends of the non-metallic isolator rest against the inner surfaces of the two connector lugs.

[0029] Its beneficial effects are: to prevent axial movement of the non-metallic isolator and to ensure reliable isolation.

[0030] The diameter of the metal guide pin matches the diameter of the assembly through hole.

[0031] Its beneficial effect is to prevent the metal guide pin from wobbling after passing through the mounting hole.

[0032] The beneficial effects of this invention are as follows: By setting a non-metallic isolator, this invention separates the metal guide pin and the metal torsion spring in the riveting fixing structure, avoiding metal-to-metal contact between the two, thereby reducing or avoiding PIM problems caused by metal-to-metal contact. This solution does not require structural adjustments to the original connector structure; it only requires adding a non-metallic isolator. It has low investment costs, is easy to implement, and is more suitable for non-destructive retrofitting of existing connectors to reduce the occurrence of PIM problems in existing connectors. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the mating state of a connector using a locking side plate buckle in the prior art;

[0034] Figure 2 This is a schematic diagram of the riveting and fixing structure of the locking side plate buckle in the prior art;

[0035] Figure 3 This is an exploded view of the locking side plate fastening and fixing structure of the connector described in Embodiment 1 of this utility model;

[0036] Figure 4 This is a schematic diagram showing the relationship between the metal guide pin and the metal torsion spring in Embodiment 1 of this utility model;

[0037] Figure 5 This is a schematic diagram of the structure of a non-metallic isolator in Embodiment 1 of this utility model;

[0038] Figure 6 This is a cross-sectional view of a non-metallic isolator according to Embodiment 1 of this utility model;

[0039] Figure 7 This is a schematic diagram of the connector housing in the connector body of Embodiment 1 of this utility model;

[0040] Figure 8 This is a schematic diagram of the locking side plate buckle in Embodiment 1 of this utility model;

[0041] The markings in the diagram are: 1. Connector body, 2. Locking side plate buckle, 3. Metal guide pin, 301. Blind hole, 4. Metal torsion spring, 5. Non-metallic isolator, 6. Spiral groove, 7. Connector housing, 8. Connector ear plate, 9. Mounting through hole, 10. Locking buckle ear plate, 11. Assembly through hole, 12. Locking hole.

[0042] 100. Adapter connector; 101. Locking protrusion. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0044] Example 1

[0045] See attached document Figure 3-6 As shown, a low-PIM connector includes a connector body 1 and a locking side plate buckle 2. The locking side plate buckle 2 is installed on one side of the connector body 1 by a riveting fixing structure. After the connector is inserted into another adapter connector 100 (such as a socket), the locking side plate buckle 2 engages with the locking protrusion 101 on the adapter connector 100, thereby achieving a locking function.

[0046] like Figure 3 , 4 As shown, the riveting and fixing structure includes a metal guide pin 3, a metal torsion spring 4, and a non-metallic isolator 5. The non-metallic isolator 5 is made of non-metallic material and has an overall cylindrical hollow structure. It is inserted through the metal guide pin 3, and the metal torsion spring 4 is sleeved on the outside of the non-metallic isolator 5. In this way, the non-metallic isolator 5 separates the metal guide pin 3 and the metal torsion spring 4, avoiding direct contact between the metal guide pin 3 and the metal torsion spring 4, thereby avoiding the occurrence of PIM problems.

[0047] Furthermore, the length of the non-metallic isolator 5 is greater than the length of the metal torsion spring 4 to ensure reliable isolation between the metal torsion spring 4 and the metal guide pin 3.

[0048] Furthermore, such as Figure 5 , 6 As shown, the outer surface of the non-metallic isolator 5 is provided with a spiral groove 6 to accommodate the spiral portion of the metal torsion spring 4. Each turn of the spiral portion of the metal torsion spring 4 is located within the spiral groove 6, which forms an axial limit on the metal torsion spring 4, preventing axial movement of the metal torsion spring 4 during use, thereby ensuring reliable isolation from the metal guide pin 3.

[0049] During assembly, the riveting and fixing structure also requires the cooperation of the connector body 1 and the locking side plate buckle 2. The relevant structures on the connector body 1 and the locking side plate buckle 2 are described below.

[0050] like Figure 7 As shown, the connector body 1 has two parallel and spaced connector ear plates 8 on its connector housing 7, and each connector ear plate 8 has a mounting through hole 9. The two mounting through holes 9 are of the same size and are coaxially arranged to allow the metal guide pin 3 to pass through. Furthermore, the diameter of the mounting through hole 9 matches the diameter of the metal guide pin 3, and the surface of the metal guide pin 3 can fit in close contact with the inner wall of the mounting through hole 9, thereby preventing the metal guide pin 3 from shaking after passing through the mounting through hole 9.

[0051] like Figure 8 As shown, the locking side plate buckle 2 has a plate-like structure, with two spaced-apart locking lugs 10 in its center. Each locking lug 10 has a mounting through hole 11. The two mounting through holes 11 are the same size and coaxially arranged to allow the metal guide pin 3 to pass through. Furthermore, the diameter of the two mounting through holes 11 is slightly larger than the diameter of the metal guide pin 3 to reduce the frictional resistance when the locking side plate buckle 2 rotates. The two ends of the locking side plate buckle 2 are the force-applying end and the locking end, respectively. The locking end has a locking hole 12 for engaging with the locking protrusion 101 (e.g., on the adapter connector 100) of the connector. Figure 3(As shown) They are fastened together, thus locking the two connectors. The force-applying end is for the user to manually press to overcome the elasticity of the metal torsion spring 4. The locking side plate buckle 2 rotates around the metal guide pin 3 as the axis, lifting the locking end and releasing the locking of the adapter connector 100.

[0052] like Figure 4 As shown, during assembly, the locking side plate buckle 2 is first placed between the two connector ear plates 8 of the connector housing 7, with the non-metallic isolator 5 equipped with the metal torsion spring 4, ensuring that the center hole of the non-metallic isolator 5 is approximately aligned with the mounting through hole 9. Then, two locking ear plates 10 are inserted between the two connector ear plates 8, with the outer surface of each locking ear plate 10 in contact with the inner surface of the adjacent connector ear plate 8 to prevent the locking side plate buckle 2 from wobbling back and forth along the axial direction of the metal guide pin 3 after assembly. The position of the locking side plate buckle 2 is then adjusted to align with the mounting through hole 11 and the mounting through hole 9. Next, the metal guide pin 3 passes sequentially through the mounting through hole 9 and the mounting through hole 11 from one side, and then through the center hole of the non-metallic isolator 5, before passing sequentially through the mounting through hole 11 and the mounting through hole 9 on the other side. Finally, the blind hole 301 at the front end of the metal guide pin 3 is riveted, causing the blind hole 301 to expand outward into a tapered shape, thereby fixing the metal guide pin 3 and preventing it from falling off.

[0053] Furthermore, the length of the non-metallic isolator 5 is equal to the distance between the inner sides of the two locking lug plates 10 on the locking side plate buckle 2. In this way, after the metal guide pin 3 and the metal torsion spring 4 are installed, both ends of the non-metallic isolator 5 can contact the inner sides of the two locking lug plates 10, which can further prevent the axial movement of the non-metallic isolator 5 and ensure a more reliable isolation effect on the metal guide pin 3 and the metal torsion spring 4.

[0054] Example 2

[0055] The difference between this embodiment and embodiment 1 is that the outer side of the non-metallic isolator 5 is no longer provided with a spiral groove 6. It is sufficient to ensure that the length of the non-metallic isolator 5 is equal to the distance between the inner sides of the two locking lug plates 10. This can also prevent the axial movement of the non-metallic isolator 5. Moreover, the contact between the end of the non-metallic isolator 5 and the inner side of the locking lug plate 10 can also prevent the possibility of the metal torsion spring 4 contacting the metal guide pin 3 after sliding.

[0056] Example 3

[0057] In embodiments 1 and 2, the distance between the outer surfaces of the two locking lugs 10 on the locking side plate buckle 2 is equal to the distance between the inner surfaces of the two connector lugs 8 on the connector housing 7. Therefore, during assembly, the two locking lugs 10 need to be inserted between the two connector lugs 8, such as... Figure 4 As shown.

[0058] The difference between this embodiment and embodiments 1 and 2 is that in this embodiment, the distance between the inner sides of the two locking lugs 10 on the locking side plate buckle 2 is equal to the distance between the outer sides of the two connector lugs 8 on the connector housing 7. During assembly, the two connector lugs 8 need to be inserted between the two locking lugs 10. Furthermore, at this time, the length of the non-metallic isolator 5 is equal to the distance between the inner sides of the two connector lugs 8, so that both ends of the non-metallic isolator 5 contact the inner sides of the two connector lugs 8.

[0059] In the above embodiments, the non-metallic isolator 5 can also be made of a non-metallic material with a certain degree of elasticity, which can be compressed in the axial direction. In this case, for embodiments 1 and 2, the length of the non-metallic isolator 5 can be slightly greater than the distance between the inner sides of the two locking lugs 10. After installation, the non-metallic isolator 5 is axially compressed to a certain extent, and both ends are pressed against the inner sides of the locking lugs 10. For embodiment 3, the length of the non-metallic isolator 5 can be slightly greater than the distance between the inner sides of the two connector lugs 8. After installation, the non-metallic isolator 5 is axially compressed to a certain extent, and both ends are pressed against the inner sides of the connector lugs 8.

[0060] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.

Claims

1. A low-PIM connector, comprising a connector body (1), a locking side plate buckle (2), and a riveting fixing structure, wherein the riveting fixing structure rotatably connects the locking side plate buckle (2) to the connector body (1), the riveting fixing structure comprising a metal guide pin (3) and a metal torsion spring (4) sleeved on the metal guide pin (3), the metal guide pin (3) being riveted to the connector body (1), and the locking side plate buckle (2) being rotatably connected to the metal guide pin (3); characterized in that: It also includes a non-metallic isolator (5), which is sleeved on the metal guide pin (3), and the metal torsion spring (4) is sleeved on the outside of the non-metallic isolator (5).

2. A low-PIM connector according to claim 1, characterized in that: The outer surface of the non-metallic isolator (5) is provided with a spiral groove (6), which extends spirally along the axial direction of the non-metallic isolator (5), and the spiral part of the metal torsion spring (4) is located in the spiral groove (6).

3. A low-PIM connector according to claim 1, characterized in that: The length of the non-metallic isolator (5) is greater than the axial length of the metallic torsion spring (4).

4. A low-PIM connector according to claim 1, characterized in that: The connector body (1) has two parallel connector ear plates (8) arranged at intervals on the outside of the connector housing (7), and the connector ear plates (8) are provided with mounting through holes (9); the locking side plate buckle (2) is provided with two parallel locking buckle ear plates (10), and the locking buckle ear plates (10) are provided with assembly through holes (11); the metal guide pin (3) passes through the mounting through holes (9) and the assembly through holes (12) to connect the locking side plate buckle (2) to the connector housing (1).

5. A low-PIM connector according to claim 4, characterized in that: The distance between the outer sides of the two locking lugs (10) is equal to the distance between the inner sides of the two connector lugs (8).

6. A low-PIM connector according to claim 5, characterized in that: The two ends of the non-metallic isolator (5) rest against the inner sides of the two locking lugs (10).

7. A low-PIM connector according to claim 5, characterized in that: The diameter of the metal guide pin (3) matches the diameter of the mounting through hole (9).

8. A low-PIM connector according to claim 4, characterized in that: The distance between the inner sides of the two locking lugs (10) is equal to the distance between the outer sides of the two connector lugs (8).

9. A low-PIM connector according to claim 7, characterized in that: The two ends of the non-metallic isolator (5) rest on the inner sides of the two connector lugs (8).

10. A low-PIM connector according to claim 9, characterized in that: The diameter of the metal guide pin (3) matches the diameter of the assembly through hole (12).

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