N-type pin radio frequency coaxial connector for enhanced protection radio frequency coaxial feeder

Abstract

The invention discloses a protection-enhanced N-type pin radio frequency coaxial connector for a radio frequency coaxial feeder. The protection-enhanced N-type pin radio frequency coaxial connector comprises a shell, a rear shell in threaded connection with the shell, a front insulator installed in the shell, a pin inserted in the front insulator, a rear insulator and a wire clamp, wherein the rear insulator and the wire clamp are installed in the rear shell; the electric connector is characterized in that an elastic contact piece is also arranged in the shell; an annular convex circle for improving the connection reliability and a compensation inclined plane for providing impedance compensation are arranged on the elastic contact piece; the rear insulator is provided with a protection groove for preventing the tail part of the contact pin from being exploded due to the skew of the inner conductor; the outer side of the shell is further connected with a hexagonal screw sleeve which is fixed through rolling rivets. According to the invention, the annular convex circle deforms when the connector is connected so as to continuously provide a connection force for the plugging contact of the connector, the connection reliability is ensured, the elastic contact element does not need to be flared or closed during processing by using the compensation inclined plane, impedance compensation can be provided for the inner hole due to the deformation of the elastic contact element, and the impedance consistency of radio frequency signals is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency coaxial connectors, and in particular to an N-type pin radio frequency coaxial connector for a radio frequency coaxial feeder with enhanced protection. Background Art

[0002] In today's mobile communication systems, both base stations and indoor distributed system networks require a large number of RF coaxial connectors, which are mainly used for the connection between RF coaxial feeders and devices, devices and devices, antennas and devices, etc. According to the centralized procurement data of several major communication operators and equipment manufacturers in recent years, the use of N-type pin coaxial connectors accounts for more than 90%, of which 90% are used on 50-12 feeders; in existing technologies, the N-type pin type for 50-12 feeders is end-face contact, which requires continuous extrusion force, resulting in many communication network systems. Poor intermodulation due to connection tightening problems; At the same time, in order to ensure the strength, protection and reliability of the connection structure, the connection structure of the N-type connector at the screw sleeve is made relatively large, and the connector and the shell are connected by a spring assembly structure. Taking the N-type hexagonal screw sleeve commonly used in the current communication industry as an example, the minimum hexagonal opposite side can only be 18mm, and the length exceeds 14mm. There is no room for weight reduction. At the same time, the spring has poor elasticity or press-fit failure, causing the risk of the screw sleeve falling off, and the extra spring and screw sleeve weight increases the system cost and weight load in disguised form; In the link between the connector and the feeder, many 50-12 feeder connectors do not have rear insulator protection. Even if the rear insulator guide protection is used, the slotted hole at the tail of the pin is not wrapped and protected. During construction, the slotted hole at the tail of the pin often explodes due to the skewness of the feeder conductor, causing the connector to fail. The sealing rings used on the feeder are free-style and need to be installed on the feeder manually. They can only be installed on the annular outer conductor of the feeder. There is also a risk of dust and water vapor entering between the outer conductor and the sheath of the feeder. With the increasing number of frequency bands of mobile communication systems and the increasing number of devices installed on base stations, the demand for reducing the load of base stations is becoming more and more urgent. At the same time, the space size after multiple systems are connected in the indoor distributed system is becoming more and more compressed, and smaller products are needed to support the access of multiple channels. To this end, an N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection is proposed. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide an N-type pin radio frequency coaxial connector for a radio frequency coaxial feeder with enhanced protection.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection, comprising a shell, a rear shell threadedly connected to the shell, a front insulator installed in the shell, a pin inserted on the front insulator, and a rear insulator and a wire clamp installed in the rear shell; it is characterized in that an elastic contact piece is also installed in the shell; the elastic contact piece is provided with an annular convex circle for improving connection reliability and a compensation slope for providing impedance compensation; the rear insulator is provided with a protective groove for preventing the tail of the pin from bursting due to the skewness of the inner conductor; the outside of the shell is also connected to a hexagonal screw sleeve fixed by rolling rivets.

[0005] Preferably, the hexagonal screw sleeve is provided with a riveted outer circle and a boss; the outer shell is provided with an annular groove for riveting the hexagonal screw sleeve.

[0006] Preferably, a sealing groove is formed between the elastic contact piece and the housing; a first sealing ring is installed in the sealing groove.

[0007] Preferably, the elastic contact piece is further provided with a positioning platform in contact with the end surface of the housing and an inclined surface for fixing the first sealing ring; the highest surface of the first sealing ring is higher than the inclined surface and one end of the housing.

[0008] Preferably, a pressure ring for fixing the rear insulator, the pin and the front insulator is also installed in the shell; the pressure ring is provided with a supplementary step and a first clamping slope for fixing the outer conductor of the feeder in cooperation with the wire clamp.

[0009] Preferably, the wire clamp is provided with a plurality of deformation grooves, a second clamping inclined surface used in conjunction with the first clamping inclined surface, and a positioning step and a supporting boss for movably mounting the wire clamp in the rear housing.

[0010] Preferably, the rear shell is provided with a support step for slidingly limiting the positioning step and the support boss, and a locking surface for shrinking and locking the wire clamp; the rear shell is installed with a second sealing ring for sealing between the rear shell and the shell.

[0011] Preferably, the supporting step is provided with a guiding slope for facilitating the installation and guidance of the wiring clamp.

[0012] Preferably, an extrusion ring, a sealing ring and a bottom ring are sequentially installed in the rear shell; an anti-slip groove for installing the bottom ring is provided in the rear shell; and the bottom ring is provided with an anti-slip boss adapted to the anti-slip groove.

[0013] Preferably, the sealing ring is further provided with a plurality of convex rings; the extrusion ring is further provided with a compression step and a transition slope; the rear shell is further provided with a riveted step for fixing the extrusion ring, the sealing ring and the bottom ring.

[0014] The beneficial effects of the present invention are as follows: the annular convex circle is deformed when the connector is connected to continuously provide a connection force for the plug-in contact of the connector, thereby ensuring the reliability of the connection; at the same time, the compensation slope is used so that the elastic contact piece does not need to be expanded or closed during processing, and its deformation can also provide impedance compensation for the inner hole, thereby ensuring the impedance consistency of the radio frequency signal; By using the protective groove on the rear insulator to wrap the tail of the pin, the inner conductor of the feeder is peeled skewed or deformed, and when the pin is installed, the tail of the pin is prevented from being stretched open and failing; The hexagonal screw sleeve is fixed to the shell by rolling rivets, so that the hexagonal screw sleeve can move freely in the radial direction and is constrained on the shell axially, thereby facilitating the reduction of the length of the screw sleeve, improving the reliability of installation and reducing the cost of use, and also facilitating the space sharing and integration of multiple routes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the parts explosion diagram of the present invention.

[0016] Figure 2 It is an assembly three-dimensional cross-sectional view of the present invention.

[0017] Figure 3 It is a cross-sectional view of the shell assembly of the present invention.

[0018] Figure 4 The utility model is a cross-sectional schematic diagram of the riveting connection between the hexagonal screw sleeve and the shell of the present invention.

[0019] Figure 5 It is a cross-sectional view of the installation of the wire clamp and the rear housing of the present invention.

[0020] Figure 6 It is a sectional view of the rear housing assembly of the present invention.

[0021] Figure 7 It is a state diagram of the present invention.

[0022] Legend: 1. Shell; 101. Annular groove; 2. Rear shell; 201. Support step; 202. Locking surface; 203. Second sealing ring; 204. Guide slope; 205. Anti-slip groove; 206. Riveting step; 3. Front insulator; 4. Insert pin; 5. Rear insulator; 501. Protection groove; 6. Wire clamp; 601. Deformation groove; 602. Second clamping slope; 603. Positioning step; 604. Support boss; 7. Elastic contact piece; 70 1. Annular convex circle; 702. Compensating inclined surface; 703. Sealing groove; 704. First sealing ring; 705. Positioning platform; 706. Inclined surface; 8. Hexagonal screw sleeve; 801. Riveted outer circle; 802. Boss; 9. Pressing ring; 901. Supplementary step; 902. First clamping inclined surface; 10. Extrusion ring; 1001. Compression step; 1002. Transition inclined surface; 11. Sealing ring; 1101. Convex ring; 12. Bottom ring; 1201. Anti-slip boss. DETAILED DESCRIPTION

[0023] Next we combine Figure 1-Figure 7 The N-type pin radio frequency coaxial connector for a radio frequency coaxial feeder with enhanced protection described in the present invention is further described.

[0024] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1-Figure 7As shown, in this embodiment, an N-type pin RF coaxial connector for a RF coaxial feeder with enhanced protection comprises a shell 1, a rear shell 2 threadedly connected to the shell 1, a front insulator 3 installed in the shell 1, a pin 4 inserted in the front insulator 3, and a rear insulator 5 and a wire clamp 6 installed in the rear shell 2; it is characterized in that an elastic contact piece 7 is also installed in the shell 1 by interference fit; the elastic contact piece 7 is provided with an annular convex circle 701 for improving connection reliability and a compensation inclined surface 702 for providing impedance compensation; the rear insulator 5 is provided with a protective groove 501 for preventing the pin 4 from bursting at the tail due to the skewness of the inner conductor; the outer shell 1 is also connected to a hexagonal screw sleeve 8 fixed by rolling rivets; the annular convex circle 701 generates a shape when the connector is connected. The plug-in contact of the connector continuously provides connecting force to ensure the reliability of the connection. At the same time, the compensation bevel 702 is used to make the elastic contact piece 7 do not need to be expanded or closed during processing. The deformation can also provide impedance compensation for the inner hole to ensure the impedance consistency of the RF signal; the tail of the pin 4 is wrapped by the protective groove 501 on the rear insulator 5 to prevent the inner conductor of the feeder from being skewed or deformed. When the pin 4 is installed, the tail of the pin 4 is prevented from being stretched open and failing; the hexagonal screw sleeve 8 is fixed to the outer shell 1 by rolling rivets, so that the hexagonal screw sleeve 8 can move freely in the radial direction and is constrained in the axial direction on the outer shell 1, thereby facilitating the reduction of the length of the screw sleeve, improving the reliability of installation and reducing the cost of use, and also facilitating the space sharing and integration of multiple lines.

[0027] See also Figure 4 As shown, the hexagonal screw sleeve 8 is provided with a riveted outer circle 801 and a boss 802; the outer shell 1 is provided with an annular groove 101 for riveting the hexagonal screw sleeve 8 to fix it; by installing the boss 802 on the hexagonal screw sleeve 8 at the annular groove 101 on the outer shell 1, the riveted outer circle 801 is deformed by using a rolling riveting process, and the boss 802 is stuck in the annular groove 101 on the outer shell 1, so that the hexagonal screw sleeve 8 can move freely radially on the outer shell 1, but is constrained axially in the annular groove 101, thereby facilitating the reduction of the length of the screw sleeve, improving the reliability of installation and reducing the cost of use, and also facilitating the space sharing and integration of multiple routes.

[0028] See also Figure 2-Figure 3As shown, a sealing groove 703 is formed between the elastic contact piece 7 and the shell 1; a first sealing ring 704 is installed in the sealing groove 703; the elastic contact piece 7 is also provided with a positioning platform 705 in contact with the end face of the shell 1 and an inclined surface 706 for fixing the first sealing ring 704; the highest surface of the first sealing ring 704 is higher than the inclined surface 706 and one end of the shell 1; the first sealing ring 704 is fixed in the sealing groove 703 formed between the elastic contact piece 7 and the shell 1 by utilizing the inclined surface 706 on the elastic contact piece 7, thereby preventing the first sealing ring 704 from falling off due to the shaking of the connector; by having the highest surface of the first sealing ring 704 be higher than the inclined surface 706 and one end of the shell 1, a deformation space is provided for waterproofing between the elastic contact piece 7 and the shell 1, thereby improving the sealing between the elastic contact piece 7 and the shell 1.

[0029] See also Figure 2-Figure 3 As shown, a pressure ring 9 for fixing the rear insulator 5, the pin 4 and the front insulator 3 is also installed in the shell 1; the pressure ring 9 is provided with a supplementary step 901 and a first clamping inclined surface 902 used in conjunction with the wire clamp 6 to fix the outer conductor of the feeder; the wire clamp 6 is provided with a plurality of deformation grooves 601, a second clamping inclined surface 602 used in conjunction with the first clamping inclined surface 902, and a positioning step 603 and a supporting boss 604 for movably installing the wire clamp 6 in the rear shell 2; the rear shell 2 is provided with a supporting step 201 for slidingly limiting the positioning step 603 and the supporting boss 604, and a locking surface 202 for contraction and locking the wire clamp 6; the rear shell 2 is provided with a second sealing ring 203 for sealing between the rear shell 2 and the shell 1; the supporting step 201 is provided with a There is a guiding bevel 204 for guiding the installation of the wire clamp 6; the outer conductor of the feeder is clamped by the first clamping bevel 902 on the pressure ring 9 and the second clamping bevel 602 on the wire clamp 6, thereby ensuring that the holding force of the feeder clamping device of the feeder meets the requirements; the wire clamp 6 is guided by the guiding bevel 204, and at the same time, the deformation groove 601 is pressed to shrink, and the supporting boss 604 passes through the supporting step 201 in the rear shell 2. After the deformation groove 601 has no pressure, it is reset by its own elasticity. The supporting step 201 can be used to limit the supporting boss 604 and the positioning step 603 of the wire clamp 6, so that the wire clamp can be slidably limited and installed in the rear shell 2 without falling off, thereby facilitating the installation of the wire clamp 6; the wire clamp 6 can be pressed by the locking surface 202 to shrink and lock.

[0030] See also Figure 5-Figure 6As shown, the rear housing 2 is also equipped with an extrusion ring 10, a sealing ring 11 and a bottom ring 12 in sequence; the rear housing 2 is provided with an anti-slip groove 205 for installing the bottom ring 12; the bottom ring 12 is provided with an anti-slip boss 1201 adapted to the anti-slip groove 205; the sealing ring 11 is also provided with a plurality of convex rings 1101; the extrusion ring 10 is also provided with a compression step 1001 and a transition slope 1002; the rear housing 2 is also provided with a riveting platform for fixing the extrusion ring 10, the sealing ring 11 and the bottom ring 12 Step 206; by utilizing the convex ring 1101 on the sealing ring 11, the sealing ring 11 is squeezed and deformed to strongly protect the sheath of the feeder, thereby preventing dust, moisture, etc. from entering the interior of the connector and between the sheath and the outer copper skin of the feeder; by utilizing the riveting step 206, the bottom ring 12 is riveted and fixed in the rear housing 2, thereby facilitating the support of the sealing ring 11; by installing the anti-dropout boss 1201 on the bottom ring 12 into the anti-dropout groove 205 in the rear housing 2, the bottom ring 12 is prevented from falling off when twisting.

[0031] When the housing 1 of the present invention is installed, firstly one end of the elastic contact piece 7 is installed in the housing 1 by interference fit until the positioning platform 705 on the elastic contact piece 7 contacts one end of the housing 1, then the front insulator 3 is inserted into the elastic contact piece 7, so that the end face of the front insulator 3 contacts the end face inside the housing 1, and at the same time, the first sealing ring 704 is installed in the sealing groove 703 formed between the elastic contact piece 7 and the housing 1, and the first sealing ring 704 is limited by the inclined surface 706 on the elastic contact piece 7, and then the pin 4 is inserted into the front insulator 3, and The rear insulator 5 is installed in the housing 1, so that the protective groove 501 on the rear insulator 5 wraps the rear end of the pin 4, and then the pressure ring 9 is installed in the housing 1 by interference fit to limit the rear insulator 5, the pin 4 and the front insulator 3. Finally, the boss 802 on the hexagonal screw sleeve 8 is installed at the annular groove 101 on the housing 1, and the riveting outer circle 801 is deformed by the rolling riveting process, and the boss 802 is inserted into the annular groove 101 on the housing 1, so that the hexagonal screw sleeve 8 can move freely radially on the housing 1, but is constrained in the annular groove 101 in the axial direction; When the rear housing 2 is installed, the wire clamp 6 is first guided by the guiding inclined surface 204, and at the same time, the deformation groove 601 is pressed to shrink, and the supporting boss 604 passes through the supporting step 201 in the rear housing 2. After the deformation groove 601 has no pressure, it is reset by its own elasticity. The supporting boss 604 and the positioning step 603 of the wire clamp 6 can be limited by the supporting step 201, so that the wire clamp 6 can be slidably limited and installed in the rear housing 2 without falling off. Then, the extrusion ring 10 and the sealing ring 11 are installed in the rear housing 2 in sequence, and finally, the anti-slip boss 1201 on the bottom ring 12 is installed in the anti-slip groove 205 in the rear housing 2, so as to prevent the bottom ring 12 from falling off when twisting, and then the bottom ring 12 is riveted and fixed in the rear housing 2 by the riveting step 206; During the use of the present invention, the feeder is firstly annularly cut to reserve 8mm to 10mm of the inner conductor of the feeder, and expose 14mm to 16mm of the outer conductor, and the annular corrugation of the outer conductor needs to be cut at the crest. The assembled rear shell 2 is preferably inserted into the feeder, and the second clamping bevel 602 of the wire clamp 6 is stuck under the reserved crest of the outer conductor. At this time, the visual clamp 6 is about 1mm higher than the rear shell 2, and then the rear shell 2 is connected to the assembled shell 1 through threads, and the inner conductor of the feeder is guided into the elastic pin 4 through the guide of the rear insulator 5, and then the shell 2 and the rear shell 2 are tightened through threads. When the threads are tightened, the wire clamp 6 is squeezed and retracted by the pressure ring 9 until its support boss 604 completely supports the support step 201 of the rear shell 2, and at the same time, the extrusion ring 10 is squeezed and displaced, causing the softer silicone rubber sealing ring 11 to deform until the gap between the feeder sheath and the rear shell 2 is completely filled, and a certain holding force is provided, thereby completing the installation of the cable end.

[0032] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. An N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection, comprising a housing, a rear housing threadedly connected to the housing, a front insulator installed in the housing, a pin inserted on the front insulator, and a rear insulator and a wire clamp installed in the rear housing; wherein: An elastic contact piece is also installed in the shell; the elastic contact piece is provided with an annular convex circle for improving connection reliability and a compensation slope for providing impedance compensation; the rear insulator is provided with a protective groove to prevent the tail of the pin from bursting due to the skewness of the inner conductor; the outside of the shell is also connected to a hexagonal screw sleeve fixed by rolling rivets.

2. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 1, characterized in that: The hexagonal screw sleeve is provided with a riveted outer circle and a boss; the outer shell is provided with an annular groove for riveting the hexagonal screw sleeve.

3. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 1, characterized in that: A sealing groove is formed between the elastic contact piece and the housing; a first sealing ring is installed in the sealing groove.

4. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 3, characterized in that: The elastic contact piece is also provided with a positioning platform in contact with the end surface of the housing and an inclined surface for fixing the first sealing ring; the highest surface of the first sealing ring is higher than the inclined surface and one end of the housing.

5. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 1, characterized in that: A pressure ring for fixing the rear insulator, the pin and the front insulator is also installed in the shell; the pressure ring is provided with a supplementary step and a first clamping inclined surface used in conjunction with the wire clamp to fix the outer conductor of the feeder.

6. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 5, characterized in that: The wire clamp is provided with a plurality of deformation grooves, a second clamping inclined surface used in conjunction with the first clamping inclined surface, and a positioning step and a supporting boss for movably installing the wire clamp in the rear shell.

7. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 6, characterized in that: The rear shell is provided with a support step for slidingly limiting the positioning step and the support boss, and a locking surface for shrinking and locking the wire clamp; the rear shell is equipped with a second sealing ring for sealing between the rear shell and the shell.

8. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 7, characterized in that: The supporting step is provided with a guiding inclined surface for facilitating the installation and guidance of the wiring clamp.

9. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 7, characterized in that: An extrusion ring, a sealing ring and a bottom ring are sequentially installed in the rear shell; an anti-slip groove for installing the bottom ring is provided in the rear shell; and an anti-slip boss adapted to the anti-slip groove is provided on the bottom ring.

10. The N-type pin RF coaxial connector for RF coaxial feeder with enhanced protection according to claim 9, characterized in that: The sealing ring is also provided with a plurality of convex rings; the extrusion ring is also provided with a compression step and a transition slope; the rear shell is also provided with a riveting step for fixing the extrusion ring, the sealing ring and the bottom ring.

Images