WO2020244173A1

WO2020244173A1 - Isolator/circulator and manufacturing method therefor

Info

Publication number: WO2020244173A1
Application number: PCT/CN2019/121225
Authority: WO
Inventors: 蒋剑
Original assignee: 苏州小工匠机器人有限公司
Priority date: 2019-06-05
Filing date: 2019-11-27
Publication date: 2020-12-10
Also published as: CN110120572A

Abstract

An isolator/circulator (100, 200) and a manufacturing method therefor. The isolator/circulator (100, 200) comprises a bottom plate (10, 10a), a cylindrical housing (20, 20a) having a cover, and an in-cavity assembly (30); the bottom of the cylindrical housing (20, 20a) having the cover is fixedly connected to the bottom plate (10, 10a); the in-cavity assembly (30) is provided in a cavity formed by combining the cylindrical housing (20, 20a) having the cover and the bottom plate (10, 10a); three notches (21, 21a) are formed on the annular surface of the cylindrical housing (20, 20a) having the cover at intervals in a circumferential direction; the in-cavity assembly (30) comprises a circuit portion; three pins (31, 31a) protruding outwards in the circuit portion directly extend outwards from the respective corresponding notches (21, 21a); the in-cavity assembly further comprises metal needles (40) that are inserted into the corresponding pins (31, 31a); the bottom plate (10, 10a) has extension portions (11, 11a) corresponding to the pins (31, 31a); the metal needles (40) pass through the extension portions (11, 11a); an insulating pad (50, 50a) is provided between each metal needle (40) and each extension portion (11, 11a); the bottom surfaces of the metal needles (40) corresponding to the three pins (31, 31a) are located on the same plane; the bottom plate (10, 10a) and the cylindrical housing (20, 20a) having the cover are both made of a metal material; the lower end of the cylindrical housing (20, 20a) having the cover is provided with a connection protrusion (22) that protrudes downwards; a positioning groove (12) is provided at a position of the bottom plate (10, 10a) corresponding to the connection protrusion (22); the connection protrusion (22) is fixedly mounted in the positioning groove (12) by means of riveting.

Description

Isolator/circulator and manufacturing method thereof

Technical field

The present invention relates to the technical field of wireless communication equipment, in particular to an isolator/circulator and a manufacturing method thereof.

Background technique

In the existing wireless communication system, the transmitter is an important part, which is composed of power amplifier (PA), coupler, isolator/circulator, connector, duplexer and antenna, among which the coupler is used For link-related monitoring functions, the isolator/circulator is used to protect the power amplifier tube, and the connector transmits the output signal to the duplexer. In the wireless field, they are all similar designs, but with the development of wireless communication, the requirements for miniaturization are getting higher and higher. As a kind of anisotropic component, the isolator/circulator plays a very important role in the field of microwave and radio frequency communication. Through its unidirectional transmission characteristics, it can protect the components in the circuit from the damage of unnecessary signals, and can also make the same circuit Realize the duplex function of sending and receiving signals.

In the prior art, the isolator/circulator includes a cylindrical shell with a cover and a bottom plate. The cylindrical shell with a cover is covered on the bottom plate. In the inner cavity of the cylindrical shell with a cover, an inner cavity is arranged. It includes a circuit part. The three pins of the circuit part protrude outwardly and respectively penetrate the outer ring surface of the cylindrical shell with a cover. The rear side of the corresponding escape hole groove protrudes from the outer ring surface of the cylindrical shell with a cover. In addition, the existing The bottom plate corresponding to the cylindrical shell with cover must be a metal structure, the bottom plate is fixed on the end surface of the circuit board, and the bottom plate of the isolator/circulator is assembled to the cylindrical shell with cover by screw locking or press-fitting. In the actual assembly process, due to the variation of the part size within the tolerance range, the tension between the bottom plate and the cylindrical shell with cover often fails to meet the standard. In addition, the flatness of the isolator/circulator/isolator and the external circuit connection may also be The impact requires manual adjustment, waste of manpower and low efficiency.

Summary of the invention

The purpose of the present invention is to provide an isolator/circulator with high production efficiency and reliable use.

Another object of the present invention is to provide a method for manufacturing an isolator/circulator with high production efficiency.

In order to achieve one of the objectives of the above-mentioned invention, the present invention provides an isolator/circulator, comprising a bottom plate, a cylindrical shell with a cover, and an inner cavity assembly. The bottom of the cylindrical shell with a cover is fixedly connected to the bottom plate, and The internal components are arranged in the cavity formed by the combination of the cylindrical shell with a cover and the bottom plate, and three gaps are circumferentially arranged on the annular surface of the cylindrical shell with a cover. The internal components include In the circuit part, the three protruding pins of the circuit part extend straight out from the corresponding notches, and are characterized in that they also include metal pins inserted into the corresponding pins, and the bottom plate has corresponding pins. An extension part, the metal needle passes through the extension part, an insulating pad is provided between the metal needle and the extension part, the bottom surfaces of the metal needles corresponding to the three pins are located on the same plane, the bottom plate and the cylindrical shell with a cover The bodies are constructed of metal material, the lower end of the cylindrical shell with a cover is provided with a downwardly convex connecting protrusion, the bottom plate is provided with a positioning groove at a position corresponding to the connecting protrusion, and the connecting protrusion is riveted Fixedly installed in the positioning groove.

As a further improvement of the present invention, the extension portion is provided with a mounting hole, the insulating pad is configured in a stepped cylindrical shape, the insulating pad is inserted into the mounting hole and the stepped portion abuts against the upper portion of the extension portion. surface.

As a further improvement of the present invention, the extension portion is provided with a slot extending radially inward from its edge, and the insulating pad is inserted into the slot.

As a further improvement of the present invention, a receiving hole is formed in the slot, the diameter of the receiving hole is larger than the width of the slot, the insulating pad is installed in the receiving hole, and the receiving hole is connected to the extension part. The edges are connected by a circular arc surface transition.

As a further improvement of the present invention, the insulating pad is configured in a cylindrical shape, including a middle part and two end parts, the diameter of the two end parts is larger than that between the middle part, and the middle part is inserted into the slot , The two end portions are respectively positioned on the upper and lower surfaces of the extension portion.

As a further improvement of the present invention, the extension part is bent toward the pin and has an end parallel to the pin, and the insulating pad is connected to the end.

As a further improvement of the present invention, the distance from the pin to the bottom of the bottom plate is between 1.5 times and 3 times the distance from the end to the bottom of the bottom plate.

As a further improvement of the present invention, the positioning groove radially penetrates the edge of the bottom plate.

As a further improvement of the present invention, the pin is provided with a perforation for inserting the metal needle, a slot is provided between the perforation and the radial edge of the pin, and the perforation passes through the slot and the The radial edges of the pins are connected.

As a further improvement of the present invention, the bottom plate includes a circular main body, the extension part extends from the edge of the main body, and the diameter of the cylindrical shell with a cover is equal to the diameter of the main body.

The present invention also provides a method for manufacturing an isolator/circulator, which includes the following steps:

Riveting the bottom plate and the cylindrical shell with cover through multiple riveting points;

Insert the insulating pad on the extension of the bottom plate;

Press the metal pins into the pins and insulating pads of the circuit part;

Press the metal pins so that the bottoms of all the metal pins are positioned on the reference platform.

As a further improvement of the present invention, the insulating pad is first inserted into the extension part of the bottom plate, and then the bottom plate and the cylindrical shell with a cover are correspondingly riveted; when pressing the metal needles, the same flat plate is used to simultaneously press all the metal needles.

Compared with the prior art, the isolator/circulator provided by the present invention rivets the base plate of the isolator/circulator and the cylindrical shell with cover by riveting, so as to solve the tension between the base plate and the cylindrical shell with cover Substandard conditions. In addition, the bottom surfaces of the metal pins corresponding to the three pins are located on the same plane, so that good flatness of the three metal pins can be ensured.

Description of the drawings

Fig. 1 is a three-dimensional schematic diagram of an isolator/circulator in a preferred first embodiment of the present invention;

Figure 2 is a front view of the isolator/circulator in Figure 1;

Figure 3 is a bottom view of the isolator/circulator in Figure 1;

Fig. 4 is an exploded schematic diagram of one of the pins of the isolator/circulator in Fig. 1;

Figure 5 is a perspective schematic view of the isolator/circulator in the preferred second embodiment of the present invention;

Figure 6 is a front view of the isolator/circulator in Figure 5;

Figure 7 is a bottom view of the isolator/circulator in Figure 5;

FIG. 8 is an exploded schematic diagram of one of the pins of the isolator/circulator in FIG. 5.

Specific embodiment

The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, these embodiments do not limit the present invention, and structural or functional changes made by those skilled in the art based on these embodiments are all included in the protection scope of the present invention.

It should be understood that terms such as "upper", "above", "below", "below" and the like used herein to indicate a relative position in space are for the purpose of facilitating explanation to describe a unit or feature as shown in the accompanying drawings. Relationship to another unit or feature. The terms of the relative position in space may be intended to include different orientations of elements in use or operation other than those shown in the figures.

As shown in Figures 1 to 4, it is a preferred first embodiment of the present invention. In this embodiment, the isolator/circulator 100 includes a bottom plate 10, a cylindrical housing 20 with a cover, and an internal component 30, a cylindrical housing with a cover The bottom of the body 20 is fixedly connected to the bottom plate 10, the cavity assembly 30 is arranged in the cavity formed by the combination of the cylindrical shell 20 with a cover and the bottom plate 10, and the annular surface of the cylindrical shell 20 with a cover is provided with three notches 21 at intervals in the circumferential direction. , The intracavity component 30 includes a circuit part, and three protruding pins 31 of the circuit part extend straight out from the corresponding notch 21. In addition, the isolator/circulator 100 also includes a metal pin 40 inserted into the corresponding pin 31. The base plate 10 has an extension 11 corresponding to the pin 31, the metal pin 40 passes through the extension 11, the metal pin 40 and the extension There is an insulating pad 50 between 11, the bottom surfaces of the metal pins 40 corresponding to the three pins 31 are located on the same plane, the bottom plate 10 and the cylindrical housing 20 with a cover are both constructed of metal material, and the lower end of the cylindrical housing 20 with a cover is provided with A downward convex connecting protrusion 22 is provided with a positioning groove 12 at a position corresponding to the connecting protrusion 22 on the bottom plate 10, and the connecting protrusion 22 is fixed to the positioning groove 12 by riveting. The bottom plate 10 of the isolator/circulator and the cylindrical shell with cover 20 are riveted together by riveting, so as to solve the problem that the tension between the bottom plate 10 and the cylindrical shell with cover 20 is not up to standard. In addition, the bottom surfaces of the metal pins 40 corresponding to the three pins 31 are located on the same plane, which can ensure that the three metal pins 40 have good flatness.

Specifically, multiple connecting protrusions 22 may be provided. In this embodiment, two connecting protrusions 22 extend downward on the ring surface between every two notches 21. In this way, the cylindrical shell 20 with a cover is provided with a total of six connecting protrusions. Protrusions 22, each connecting protrusion 22 is arranged closer to the notch 21 relative to the circumferential middle of the ring surface. Correspondingly, the bottom plate 10 is also provided with six positioning grooves 12 corresponding to the positions of the six connecting protrusions 22, Each connecting protrusion 22 is fixed in the corresponding positioning groove 12 by riveting, that is, each connecting protrusion 22 and its corresponding positioning groove 12 form a riveting point through the bottom plate 10 of the isolator/circulator and the cylinder with cover There are multiple riveting points between the shells 20. The metal of the riveting points is plastically deformed by stamping, and a strong bonding force is generated. The two are riveted together to solve the problem of insufficient tension between the bottom plate 10 and the cylindrical shell 20 with a cover. Case.

The bottom plate 10 includes a circular main body, the extension portion 11 extends from the edge of the main body, and the diameter of the cylindrical casing 20 with a cover is equal to the diameter of the main body, which makes it easier to form the positioning groove 12, thereby simplifying the process. In this embodiment, the positioning groove 12 radially penetrates the edge of the bottom plate 10, that is to say, the positioning groove 12 can be regarded as a notch formed on the edge of the bottom plate 10, which is easier to realize the riveting between the bottom plate 10 and the cylindrical shell 20 with a cover. .

Furthermore, the extension portion 11 is provided with a mounting hole 112, the insulating pad 50 is configured in a stepped cylindrical shape, the insulating pad 50 is inserted into the mounting hole 112 and the step portion thereof abuts against the upper surface of the extension portion 11. The insulating pad 50 has a central hole for inserting the metal pin 40 to achieve insulation between the metal pin 40 and the bottom plate 10. In addition, the stepped shape of the insulating pad 50 will also ensure that when the metal needle 40 is inserted, the insulating pad 50 will not be driven to move, resulting in poor assembly. In this embodiment, the extension portion 11 is bent toward the pin 31 and has an end 114 parallel to the pin 31, and the insulating pad 50 is connected to the end 114. By bending the extension portion 11, the distance between the pin 31 and the insulating pad 50 is reduced, and the flatness of the metal pin 40 is ensured. Preferably, the distance between the pin 31 and the bottom of the bottom plate 10 is between 1.5 times and 3 times the distance between the end 114 and the bottom of the bottom plate 10, which is convenient for processing and ensures the overall strength.

4, the pin 31 is provided with a through hole 311 for inserting the metal needle 40, a slot 312 is provided between the through hole 311 and the radial edge of the pin 31, and the through hole 311 passes through the slot 312 and the pin 31. The radial edges are connected. The provision of the slot 312 is a process requirement to ensure better contact between the metal needle 40 and the pin 31. The slot may not be provided, and the penetration of the metal needle 40 can be achieved by only providing the through hole 311.

As shown in Figures 5 to 8, it is a preferred second embodiment of the present invention. In this embodiment, an isolator/circulator 200 is disclosed, including a bottom plate 10a, a cylindrical housing 20a with a cover, and an inner cavity assembly 30. The bottom of the cylindrical housing 20a with a cover is fixedly connected to the bottom plate 10a, and the cavity assembly 30 It is arranged in the cavity formed by the combination of the cylindrical shell with cover 20a and the bottom plate 10a. The annular surface of the cylindrical shell with cover 20a is provided with three gaps 21a at intervals in the circumferential direction. The cavity assembly 30 includes a circuit part and three circuit parts. Two convex pins 31 extend straight out from the corresponding notches 21a. In addition, the isolator/circulator 200 also includes a metal pin 40 inserted into the corresponding pin. The bottom plate 10a has an extension 11a corresponding to the pin 31. The metal pin 40 passes through the extension 11a, the metal pin 40 and the extension 11a. An insulating pad 50a is provided between the three pins 31, and the bottom surfaces of the metal pins 40 corresponding to the three pins 31 are located on the same plane. The bottom plate 10a and the cylindrical shell with cover 20a are both constructed of metal material, and the lower end of the cylindrical shell with cover 20a is provided with a bottom surface. The convex connecting protrusion 22 is provided with a positioning groove 12 at a position corresponding to the connecting protrusion 22 on the bottom plate 10 a, and the connecting protrusion 22 is fixedly fixed to the positioning groove 12 by riveting. The bottom plate 10a of the isolator/circulator 200 and the cylindrical shell with cover 20a are riveted together by riveting to solve the problem that the tension between the bottom plate 10a and the cylindrical shell with cover 20a is not up to standard. In addition, the bottom surfaces of the metal pins 40 corresponding to the three pins 31 are located on the same plane, which can ensure that the three metal pins 40 have good flatness.

In this embodiment, the specific structure of the isolator/circulator 200 is the same as that of the first embodiment and will not be repeated. The difference from the first embodiment is that the extension portion 11a is provided with a radially inwardly extending edge from its edge. In the slot 115, the insulating pad 50a is inserted into the slot 115, so that the insulating pad 50a can be squeezed into the slot 115 from the outside to the inside in the radial direction. In this embodiment, a receiving hole 116 is formed in the slot 115, the diameter of the receiving hole 116 is larger than the width of the slot 115, and the insulating pad 50 is installed in the receiving hole 116 to prevent displacement of the insulating pad 50a in the slot 115. The accommodating hole 116 and the edge of the extension 11a are transitionally connected by the arc surface 117, which makes it easier to insert the insulating pad 50 into the accommodating hole 116 in a radial direction. The insulating pad 50a is configured in a cylindrical shape and includes a middle part 51 and two end parts 52. The diameter of the two end parts 52 is larger than that between the middle part 51, the middle part 51 is inserted into the slot 115, and the two end parts 52 They are respectively positioned on the upper and lower surfaces of the extension portion 11a, restricting the movement of the insulating pad 50a relative to the extension portion 11a in the axial direction.

In addition, in this embodiment, the bottom plate 10a also includes a circular main body, the extension 11a extends from the edge of the main body, the diameter of the cylindrical casing 20a with a cover is equal to the diameter of the main body, and the slot 115 can extend into the outer edge of the main body. In addition, the root of the extension portion 11a may also be located inside the outer edge of the main body, thereby reducing the bending strength of the extension portion 11a.

In the above two embodiments, when assembling the isolator/circulator, for example, the metal needle and the insulating pad are assembled as one part, and due to the deformation of other assembled parts, the three metal needles are prone to poor flatness, requiring manual labor. Adjustment, waste of manpower and low efficiency. To solve this problem, the present invention also proposes a method for manufacturing an isolator/circulator, which includes the following steps:

Insert the insulating pad on the extension of the bottom plate;

Press the metal pins into the pins and insulating pads of the circuit part;

In specific steps, the insulating pad can be inserted into the extension of the bottom plate first, and then the bottom plate and the cylindrical shell with cover can be riveted correspondingly; when pressing the metal needles, the same flat plate can be used to press all the metal needles at the same time.

In the above-mentioned manufacturing method, the problem of poor flatness of the three metal needles is solved by pressing the metal needles afterwards.

It should be understood that although this specification is described in accordance with the implementation manners, not each implementation manner only includes an independent technical solution. This narration in the specification is only for clarity, and those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of feasible implementations of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementations or implementations made without departing from the technical spirit of the present invention All changes shall be included in the protection scope of the present invention.

Claims

An isolator/circulator, comprising a bottom plate, a cylindrical shell with a cover, and an inner cavity component. The bottom of the cylindrical shell with a cover is fixedly connected to the bottom plate, and the cavity component is arranged on the cylindrical shell with a cover. In the cavity formed by the combination of the body and the bottom plate, the annular surface of the cylindrical shell with a cover is provided with three gaps at intervals in the circumferential direction, the cavity assembly includes a circuit part, and the three convex parts of the circuit part The pin extends straight out from the corresponding notch, and is characterized in that: it further includes a metal pin inserted into the corresponding pin, the bottom plate has an extension corresponding to the pin, and the metal pin passes through the extension An insulating pad is provided between the metal needle and the extension part, the bottom surfaces of the metal needles corresponding to the three pins are located on the same plane, the bottom plate and the cylindrical housing with cover are both constructed of metal material, and the cylindrical housing with cover The lower end of the housing is provided with a downwardly convex connecting protrusion, the bottom plate is provided with a positioning groove at a position corresponding to the connecting protrusion, and the connecting protrusion is fixed to the positioning groove by riveting.
The isolator/circulator according to claim 1, wherein the extension part is provided with a mounting hole, the insulating pad is configured in a stepped cylindrical shape, and the insulating pad is inserted into the mounting hole and has a stepped shape. The part abuts against the upper surface of the extension part.
The isolator/circulator according to claim 1, wherein the extension portion is provided with a slot extending radially inward from its edge, and the insulating pad is inserted into the slot.
The isolator/circulator according to claim 3, wherein a receiving hole is formed in the slot, the diameter of the receiving hole is larger than the width of the slot, and the insulating pad is installed in the receiving hole, The accommodating hole and the edge of the extension part are transitionally connected by a circular arc surface.
The isolator/circulator according to claim 3, wherein the insulating pad is configured in a cylindrical shape and includes a middle part and two end parts, and the diameter of the two end parts is larger than that between the middle part, and The middle part is inserted into the slot, and the two end parts are respectively positioned on the upper and lower surfaces of the extension part.
The isolator/circulator according to claim 1, wherein the extension portion is bent toward the pin and has an end parallel to the pin, and the insulating pad is connected to the end .
The isolator/circulator according to claim 1, wherein the pin is provided with a perforation for inserting the metal pin, and a narrow gap is formed between the perforation and the radial edge of the pin. A slot, the perforation communicates with the radial edge of the pin through a slot.
The isolator/circulator according to claim 1, wherein the bottom plate comprises a circular main body, the extension part extends from the edge of the main body, and the positioning groove radially penetrates the edge of the bottom plate, The diameter of the covered cylindrical shell is equal to the diameter of the main body.
A method for manufacturing an isolator/circulator is characterized in that it comprises the following steps:

Riveting the bottom plate and the cylindrical shell with cover through multiple riveting points;

Insert the insulating pad on the extension of the bottom plate;

Press the metal pins into the pins and insulating pads of the circuit part;

Press the metal pins so that the bottoms of all the metal pins are positioned on the reference platform.
The method for manufacturing an isolator/circulator according to claim 9, wherein the insulating pad is first inserted into the extension of the bottom plate, and then the bottom plate and the cylindrical shell with cover are correspondingly riveted; when pressing the metal pin , Use the same plate to press all the metal needles at the same time.