A miniaturized surface-mount circulator and its implementation method

Abstract

The present invention discloses a miniaturized surface-mount circulator, including a shell, wherein the interior of the shell is provided with a bottom plate, a lower magnet, a lower uniform magnetic sheet, a lower ferrite, a central conductor, an upper ferrite, an upper uniform magnetic sheet, an upper magnet, a lower temperature patch sheet, an upper temperature patch sheet and a cover plate in order from bottom to top, wherein the shell is a PPS one-piece injection molding structure, and pins are provided on the circumference of the central conductor, and the pins are bent structures that are attached to the surface of the shell downward; the present invention also discloses a method for realizing a miniaturized surface-mount circulator. The central conductor and the pins of the present invention are an one-piece molding structure, and the central conductor is directly connected to the circuit board through the bottom foot at the end of the pin, and no longer needs to be transferred to the circuit board through a plug core, so that the electrical performance is more stable from the source, and the mismatch problem caused by welding is avoided, and at the same time, the product short circuit sparking problem and appearance pollution problem caused by welding are avoided, and the impedance mismatch error of the connection between the central conductor and the plug core is also reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field, and in particular relates to a miniaturized surface-mount circulator and a realization method thereof. Background Art

[0002] With the increase in 5G construction and market demand and applications, as well as the good indoor network coverage required by these applications, mobile operators have been asked to meet extremely high requirements. However, modern building materials block outdoor wireless signals, resulting in outdoor wireless deployment being unable to solve the problem of indoor coverage. This has led to a surge in small base stations, and thus also put forward requirements for ultra-miniaturization of wave circulators and isolators.

[0003] Considering that the traditional circulator is composed of a metal cavity, ferrite magnet, permanent magnet, center conductor, ferrule, dielectric ring and compensation plate, it has a complex structure and a relatively large size. The miniaturized assembly design requirements have gradually restricted the structural requirements of the circulator, especially the welding requirements of the center conductor and ferrule of the miniaturized device, which are prone to the risk of short circuit and sparking, and have gradually failed to meet the actual application needs of the new generation of products.

[0004] In view of this, we designed a ferrite circulator that does not require soldering of the center conductor. Summary of the invention

[0005] The purpose of the present invention is to provide a miniaturized surface-mount circulator to solve the problems raised in the above background technology. The miniaturized surface-mount circulator provided by the present invention has the characteristics of a central conductor being integrally formed without welding, thereby avoiding the risk of poor appearance or solder short circuit sparking caused by welding.

[0006] Another object of the present invention is to provide a method for realizing a miniaturized surface-mount circulator.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a miniaturized surface-mount circulator, comprising a shell, wherein the interior of the shell is provided with a base plate, a lower magnet, a lower uniform magnetic sheet, a lower ferrite, a center conductor, an upper ferrite, an upper uniform magnetic sheet, an upper magnet, a lower temperature compensation sheet, an upper temperature compensation sheet and a cover plate from bottom to top, wherein the shell is a PPS one-piece injection molding structure, pins are provided on the circumference of the center conductor, and notches corresponding to the pins are provided on the shell, the pins are located in the notches, and the pins are bent structures downwardly close to the surface of the shell.

[0008] In order to avoid the mismatch problem caused by welding, and at the same time avoid the problem of product short circuit sparking and appearance pollution caused by welding, in the present invention, a bump is further provided at the bottom of the notch, the upper surface of the bump is flush with the lower surface of the center conductor, and the pin is bent along the upper surface of the bump to fit with the outer surface of the bump. The lower end of the pin is bent to fit with the bottom of the bump, and the end that fits with the bottom of the bump is the foot.

[0009] Furthermore, in the present invention, the bottom plate and the cover plate are both metal components.

[0010] In order to facilitate the assembly between the cover plate and the housing, in the present invention, the cover plate is further connected to the inner wall of the housing by threaded engagement. A hexagonal bolt groove is provided in the middle of the upper surface of the cover plate.

[0011] In order to limit the bottom plate and facilitate the rapid assembly of the bottom plate, in the present invention, the shell is a hollow cylindrical structure with upper and lower openings. A limiting ring is provided at the bottom end of the shell.

[0012] In the present invention, the method for realizing a miniaturized surface-mount circulator further comprises the following steps:

[0013] (1) injection molding the shell;

[0014] (ii) Place the bottom plate, lower magnet, lower uniform magnetic sheet, lower ferrite, central conductor, upper ferrite, upper uniform magnetic sheet, upper magnet, lower temperature patch sheet, upper temperature patch sheet and cover plate into the housing from bottom to top;

[0015] (3) The bottom plate is limited by the limiting ring at the bottom of the shell, and the cover is tightened with an Allen wrench;

[0016] (iv) bend the pin of the center conductor along the top surface of the bump until it fits with the outer surface;

[0017] (V) Bend the lower end of the pin until it fits with the bottom surface of the bump to form a foot.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention sets the housing and the bottom plate into a split structure, and the housing is integrally injection molded by PPS, so that the housing can insulate the pins, and no insulating medium is needed, which greatly saves production costs;

[0020] 2. The center conductor and the pin of the present invention are an integrally formed structure. The center conductor is directly connected to the circuit board through the bottom foot at the end of the pin, and no longer needs to be transferred to the circuit board through the ferrule. The electrical performance is more stable from the source, avoiding the mismatch problem caused by welding, and the product short circuit sparking problem and appearance pollution problem caused by welding. It also reduces the impedance mismatch error between the center conductor and the ferrule.

[0021] 3. The present invention can achieve electrical performance indicators when realizing clockwise or counterclockwise transmission of electrical signals, and reduce the impact of multiple assembly mismatches;

[0022] 4. Compared with the traditional circulator, the weight of the present invention is reduced by 10%-30%, the number of parts is reduced by about 30%, the production efficiency is increased by more than 1.5 times, the energy consumption is reduced by about 25%, the cost is reduced by more than 30%, and the performance change or ignition hazard caused by soldering can be eliminated;

[0023] 5. The present invention limits the bottom plate by a limiting ring, and the cover plate is connected to the inner wall of the shell by threaded engagement, which greatly saves the process and cost of the assembly link. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure explosion of the present invention;

[0025] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the housing of the present invention;

[0027] Figure 4 It is a schematic cross-sectional structural diagram of the housing of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the central conductor of the present invention;

[0029] In the figure: 1, cover plate; 2, upper temperature patch; 3, lower temperature patch; 4, upper magnet; 5, upper uniform magnetic plate; 6, upper ferrite; 7, center conductor; 71, pin; 72, base; 8, lower ferrite; 9, lower uniform magnetic plate; 10, lower magnet; 11, bottom plate; 12, shell; 13, notch; 14, bump; 15, limit ring; 16, hexagonal bolt slot. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] See also Figure 1-5 The present invention provides the following technical solutions: a miniaturized surface-mount circulator, comprising a shell 12, wherein the interior of the shell 12 is provided with a bottom plate 11, a lower magnet 10, a lower uniform magnetic sheet 9, a lower ferrite 8, a central conductor 7, an upper ferrite 6, an upper uniform magnetic sheet 5, an upper magnet 4, a lower temperature compensation sheet 3, an upper temperature compensation sheet 2 and a cover plate 1 from bottom to top, wherein the shell 12 is a PPS one-piece injection molding structure, a pin 71 is provided on the circumference of the central conductor 7, a notch 13 corresponding to the pin 71 is provided on the shell 12, the pin 71 is located in the notch 13, and the pin 71 is a bent structure downwardly attached to the surface of the shell 12.

[0033] Specifically, a bump 14 is provided at the bottom of the slot 13, the upper surface of the bump 14 is flush with the lower surface of the center conductor 7, the pin 71 is bent along the upper surface of the bump 14 to fit with the outer surface of the bump 14, the lower end of the pin 71 is bent to fit with the bottom of the bump 14, and the end that fits with the bottom of the bump 14 is the base foot 72.

[0034] By adopting the above technical solution, the center conductor 7 and the pin 71 are an integrally formed structure, and the center conductor 7 is directly connected to the circuit board through the bottom foot 72 at the end of the pin 71, and no longer needs to be transferred to the circuit board through the ferrule, so that the electrical performance is more stable from the source, avoiding the mismatch problem caused by welding, and at the same time avoiding the product short circuit sparking problem and appearance pollution problem caused by welding, and also reducing the impedance mismatch error between the center conductor 7 and the ferrule;

[0035] The PPS injection-molded bump 14 can insulate the pin 71, eliminating the need for an insulating medium, thus greatly saving production costs;

[0036] Specifically, the bottom plate 11 and the cover plate 1 are both metal components.

[0037] By adopting the above technical solution, the metal component is Y15 steel or other magnetically conductive metals, and Y15 steel is preferably used in this embodiment.

[0038] Specifically, the cover plate 1 is connected to the inner wall of the housing 12 by threaded engagement, and a hexagonal bolt groove 16 is provided in the middle of the upper surface of the cover plate 1 .

[0039] By adopting the above technical solution, the assembly between the cover plate 1 and the shell 12 is facilitated.

[0040] Example 2

[0041] The present embodiment is different from the first embodiment in that: specifically, the shell 12 is a hollow cylindrical structure with upper and lower openings, a limiting ring 15 is provided at the bottom end of the shell 12, and the shell 12, the limiting ring 15 and the protrusion 14 are integrally injection molded.

[0042] By adopting the above technical solution, the bottom plate 11 is limited by the limiting ring 15, which facilitates the rapid assembly of the bottom plate 11.

[0043] Furthermore, a method for realizing a miniaturized surface-mount circulator according to the present invention comprises the following steps:

[0044] (a) performing injection molding on the housing 12;

[0045] (ii) Place the bottom plate 11, the lower magnet 10, the lower uniform magnetic sheet 9, the lower ferrite 8, the central conductor 7, the upper ferrite 6, the upper uniform magnetic sheet 5, the upper magnet 4, the lower temperature patch sheet 3, the upper temperature patch sheet 2 and the cover plate 1 into the housing 12 from bottom to top;

[0046] (iii) The bottom plate 11 is limited by the limiting ring 15 at the bottom of the housing 12, and the cover plate 1 is tightened with an Allen wrench;

[0047] (iv) bend the pin 71 of the center conductor 7 along the top surface of the bump 14 until it fits with the outer surface;

[0048] (V) Bend the lower end of the pin 71 until it fits with the bottom surface of the bump 14 to form a foot 72 .

[0049] In summary, the present invention sets the shell 12 and the bottom plate 11 as a split structure, and the shell 12 is integrally injection molded by PPS, so that the shell 12 can insulate the pin 71, and no insulating medium is needed, which greatly saves the production cost; the central conductor 7 and the pin 71 of the present invention are an integrally molded structure, and the central conductor 7 is directly connected to the circuit board through the bottom foot 72 at the end of the pin 71, and no longer needs to be transferred to the circuit board through the core, so that the electrical performance is more stable from the source, avoiding the mismatch problem caused by welding, and at the same time avoiding the product short circuit spark problem and appearance pollution problem caused by welding, and also reducing The impedance mismatch error between the center conductor 7 and the ferrule connection; the present invention can achieve electrical performance indicators when realizing clockwise or counterclockwise transmission of electrical signals, and reduce the impact of multiple assembly mismatches; compared with the traditional circulator, the weight of the present invention is reduced by 10%-30%, the number of components is reduced by about 30%, the production efficiency is increased by more than 1.5 times, the energy consumption is reduced by about 25%, the cost is reduced by more than 30%, and the performance changes or fire hazards caused by soldering are eliminated; the present invention limits the bottom plate 11 by a limiting ring 15, and the cover plate 1 is connected to the inner wall of the shell 12 by threaded engagement, which greatly saves the process and cost of the assembly link.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A miniaturized surface-mount circulator, characterized in that: The invention comprises a shell, wherein the interior of the shell is provided with a bottom plate, a lower magnet, a lower uniform magnetic sheet, a lower ferrite, a central conductor, an upper ferrite, an upper uniform magnetic sheet, an upper magnet, a lower temperature compensation sheet, an upper temperature compensation sheet and a cover plate in order from bottom to top, wherein the shell is a PPS one-piece injection molding structure, the bottom plate and the cover plate are both metal components, the shell is a hollow cylindrical structure with upper and lower openings, a limiting ring is provided at the bottom end of the shell, a pin is provided on the circumference of the central conductor, a notch corresponding to the pin is provided on the shell, the pin is located in the notch, and the pin is a bent structure downwardly close to the shell surface; A bump is provided at the bottom of the notch, the upper surface of the bump is flush with the lower surface of the central conductor, and the pin is bent along the upper surface of the bump until it fits with the outer surface of the bump.

2. A miniaturized surface-mount circulator according to claim 1, characterized in that: The lower end of the pin is bent to fit with the bottom of the bump, and the end fitting with the bottom of the bump is the foot.

3. A miniaturized surface-mount circulator according to claim 1, characterized in that: The cover plate is connected to the inner wall of the shell through threaded engagement.

4. The miniaturized surface-mount circulator according to claim 1, characterized in that: A hexagonal bolt groove is provided in the middle of the upper surface of the cover plate.

5. A method for realizing a miniaturized surface-mount circulator according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) injection molding the shell; (ii) Place the bottom plate, lower magnet, lower uniform magnetic sheet, lower ferrite, central conductor, upper ferrite, upper uniform magnetic sheet, upper magnet, lower temperature patch sheet, upper temperature patch sheet and cover plate into the housing from bottom to top; (3) The bottom plate is limited by the limiting ring at the bottom of the shell, and the cover is tightened with an Allen wrench; (iv) bend the pin of the center conductor along the top surface of the bump until it fits with the outer surface; (V) Bend the lower end of the pin until it fits with the bottom surface of the bump to form a foot.

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