CN216055100U

CN216055100U - Miniaturized metal cavity filter

Info

Publication number: CN216055100U
Application number: CN202121646675.5U
Authority: CN
Inventors: 刘涛; 成钢; 梁钦保
Original assignee: Tongyu Communication Inc
Current assignee: Tongyu Communication Inc
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-03-15
Anticipated expiration: 2031-07-20

Abstract

The utility model provides a miniaturized metal cavity filter, includes metal cavity, panel beating resonance piece, debugging apron and transfers spiral shell subassembly, metal cavity is equipped with the joint body that is used for joint panel beating resonance piece, is equipped with draw-in groove or joint on the panel beating resonance piece and connects, be equipped with on the joint body with panel beating resonance piece on draw-in groove complex joint connect or with panel beating resonance piece on joint connect complex draw-in groove, welded fastening between draw-in groove and the joint connect. The utility model has convenient and quick fixation of the resonance sheet without depending on screw connection, thereby saving installation materials and processing installation columns in the metal cavity, thereby reducing the whole weight of the filter.

Description

Miniaturized metal cavity filter

Technical Field

The utility model belongs to the field of cavity filters, and particularly relates to a miniaturized metal cavity filter.

Background

The filter is a typical frequency selection device, which can effectively suppress the useless signals, so that the useless signals cannot pass through the filter, and only the useful signals smoothly pass through the filter, therefore, the quality of the performance of the filter directly affects the quality of the whole communication system, and the filter is a vital device in modern microwave and millimeter wave communication systems.

The cavity filter is an important filter, and compared with filters with other properties, the cavity filter has the advantages of firm structure, stable and reliable performance, small volume, moderate Q value, far high-end parasitic passband and good heat dissipation performance, and can be used for higher power and frequency.

With the development of 5G communication, filters gradually tend to be miniaturized, lightweight, low-cost, and high-performance. The small metal cavity filter reduces the size and weight of the filter on the premise of keeping the performance of the filter basically stable by improving the metal processing technology, and meets the requirements of a 5G base station system. Compared with other filters, the small metal cavity filter has stable performance and mature process and can be used commercially quickly. At the low frequency band of 5G, the small metal cavity filter is still competitive, but as the frequency is increased, the requirements on the filter are higher, and the process is more difficult to realize.

The resonant piece fixing mode of the existing small-sized metal cavity filter is mostly screw fastening installation: fig. 1 shows a manner in which a sheet metal resonator plate is fastened and fixed by screws in the prior art. The resonant plate is firstly arranged at the cavity step 6 and is fastened by a screw. And then, soldering paste is applied to the welding surface 5 of the cavity cover plate, the debugging cover plate 3 is assembled and positioned with the welding surface 5 of the cavity cover plate by virtue of the positioning column, and finally, the soldering forming is carried out. This mode need use more screw, and not only complex operation, the wave filter structure is comparatively complicated moreover, needs to process more erection column, and manufacturing cost is higher, and wave filter self weight is great, is not conform to the miniaturized, lightweight market trend of present wave filter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a miniaturized metal cavity filter, which optimizes the fixation of a resonance sheet, does not need to additionally provide materials such as screws for fixation, and does not need to process an installation column in a cavity, thereby realizing the purpose of weight reduction.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a miniaturized metal cavity filter, includes metal cavity, panel beating resonance piece, debugging apron and transfers spiral shell subassembly, metal cavity is equipped with the joint body that is used for joint panel beating resonance piece, is equipped with draw-in groove or joint on the panel beating resonance piece and connects, be equipped with on the joint body with panel beating resonance piece on draw-in groove complex joint connect or with panel beating resonance piece on joint connect complex draw-in groove, welded fastening between draw-in groove and the joint connect.

To an implementation of above-mentioned technical scheme, the middle part of panel beating resonant chip is equipped with C shape draw-in groove, is equipped with the baffle in the metal cavity, and baffle one end is connected with the lateral wall of metal cavity, leaves the clearance that holds panel beating resonant chip limit portion between another lateral wall of relative other end and metal cavity, and the baffle is the stair structure, as the joint body, the part is as inserting above the step on the baffle the joint of C shape draw-in groove connects.

Furthermore, the debugging cover plate is arranged on the upper surface of the metal cavity and is parallel to the metal plate resonance sheet, and the screw adjusting component is arranged on the debugging cover plate.

Further, a PIN needle assembly is arranged on the side wall of the metal cavity.

For another implementation mode of the technical scheme, the sheet metal resonance sheet is provided with two layers of plate surfaces which are parallel up and down, the two layers of plate surfaces are connected through a connecting arm on the side surface, the same end of the two layers of plate surfaces is provided with a clamping joint, the side surface of the clamping joint is provided with a limiting part for limiting the depth of the clamping joint inserted into the clamping groove, and the limiting part is arranged on the main body of the sheet metal resonance sheet; one side plate of the metal cavity is used as the clamping body, and a clamping groove used for being clamped with the metal plate resonance piece is formed in the side plate; still be equipped with a baffle that is located between the metal plate resonance piece two-layer from top to bottom in the metal cavity, leave between the opposite side board of baffle and metal cavity and hold the clearance of linking arm, the tip of baffle and the joint have another draw-in groove joint on the curb plate of metal plate resonance piece.

Furthermore, a side plate for connecting the metal plate resonance sheet is a stamping part formed by stamping and welded in a notch on one side of the metal cavity.

Furthermore, a gap of 0.05mm is reserved between the clamping joint on the clamping groove and the metal plate resonance sheet so as to facilitate welding.

Furthermore, a gap of 0.05mm is reserved between the clamping joint at the end part of the clamping groove and the partition plate so as to facilitate welding.

Furthermore, the debugging cover plate is arranged on the upper surface and the lower surface of the metal cavity and is parallel to two plate surfaces of the metal plate resonance sheet, and the screw adjusting component is arranged on the debugging cover plate.

The utility model has the beneficial effects that: the metal plate resonant sheet and the clamping body of the metal cavity are quickly connected in a clamping mode and then are welded and fixed without depending on screws, so that the mounting material is saved, and the mounting column does not need to be processed in the metal cavity, so that the integral weight of the filter can be reduced. During welding, reflow soldering or laser welding can be adopted for rapid forming, so that the weight is reduced, the materials are reduced, and the cost is reduced. The sheet metal resonance sheet and the side plates can adopt sheet metal parts formed by stamping, and manufacturing cost is saved.

Drawings

FIG. 1 is an exploded view of a small and medium-sized metal cavity filter in the prior art;

FIG. 2 is an exploded view of a small and medium-sized metal cavity filter in example 1;

fig. 3 is an assembly schematic diagram of the sheet metal resonator plate in embodiment 1;

FIG. 4 is an exploded view of a small and medium-sized metal cavity filter in example 2;

fig. 5 is an assembly schematic diagram of a sheet metal resonator plate and a side plate in embodiment 2;

FIG. 6 is a schematic structural view of a side plate assembly in embodiment 2;

FIG. 7 is a schematic view showing the assembly of the side plate assembly and the metal cavity in example 2;

the labels in the figure are: 1. the metal cavity, 101, curb plate, 102, locating hole, 103, rectangle draw-in groove, 2, panel beating resonance piece, 201, C shape draw-in groove, 202, the bar connects, 203, spacing portion, 204, the linking arm, 3, the debugging apron, 4, transfer spiral shell subassembly, 5, cavity apron face of weld, 6, the cavity step, 7, PIN needle subassembly, 8, baffle, 801, step, 802, location joint, 803, L shape constant head tank.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples, but the utility model is not limited thereto.

Referring to the attached drawings, the miniaturized metal cavity filter comprises a metal cavity 1, a metal plate resonance sheet 2, a debugging cover plate 3 and a screw adjusting assembly 4, wherein the screw adjusting assembly 4 is assembled on the debugging cover plate 3, the debugging cover plate 3 is installed on one side or two sides of the metal cavity 1, and PIN needle assemblies 7 are further arranged on other side faces of the metal cavity 1. The assembly of panel beating resonant chip 2 relies on the joint that sets up on panel beating resonant chip 2 to connect or the draw-in groove of the joint body or joint articulate on draw-in groove and the metal cavity 1, fixes through welding mode at last. According to the shape of the metal plate resonance piece 2, different assembling modes are provided, and different structures of the metal cavity filter are further formed.

Example 1: as shown in fig. 2 and 3, in this embodiment, the sheet metal resonator plate 2 is a flat sheet metal part formed by stamping, a C-shaped slot 201 is disposed in the middle of the sheet metal resonator plate, a partition plate 8 perpendicular to the bottom surface is correspondingly disposed at the bottom of the metal cavity 1, the cavity is divided into a left part and a right part, one end of the partition plate 8 is integrated with the side wall of the metal cavity 1, a gap for accommodating an edge of the sheet metal resonator plate 2 is left between the other opposite end of the partition plate and the other side wall of the metal cavity 1, the partition plate 8 is a step plate having a step structure, the upper section of the step plate is used as a clamping body provided with a clamping joint, the C-shaped slot 201 of the sheet metal resonator plate 2 is clamped with the upper section of the partition plate 8, and then the sheet metal resonator plate 2 and the partition plate 8 are welded and fixed by welding. During installation, tin dotting treatment is required to be carried out at the raised step 801 on the partition plate 8, and then the sheet metal resonance plate 2 is installed, so that the step 801 abuts against the lower surface of the sheet metal resonance plate 2 to limit the sheet metal resonance plate 2. The debugging cover plate 3 provided with the screw adjusting component 4 is fixed on the upper surface of the metal cavity 1.

Example 2: as shown in fig. 4 to 7, in the present embodiment, the sheet metal resonator plate 2 is a stamped sheet metal part having an upper plane and a lower plane, and a connecting arm 204 is connected between the two planes, so as to form a C-shaped structure. The same end of the two planes is provided with a strip-shaped joint 202 extending along the plate surface as a clamping joint for assembly. The bar connects 202 both ends to be the fillet to be equipped with curved spacing portion 203 on corresponding planar main part, be equipped with the arc spacing groove between spacing portion 203 and the bar connects 202. Correspondingly, a side plate 101 on the side surface of the metal cavity 1 and the main body of the metal cavity 1 are processed separately, and a notch for installing the side plate 101 is reserved on the side surface of the metal cavity 1. This curb plate 101 adopts stamping forming's sheet metal component, be equipped with two rectangle draw-in grooves 103 that cooperate the use with strip joint 202 on the panel beating resonant piece 2 on this curb plate 101, when the panel beating resonant piece 2 joint is on rectangle draw-in groove 103, spacing portion 203 on the panel beating resonant piece 2 can push up on the face of curb plate 101, again through welded mode with panel beating resonant piece 2 and curb plate 101 welded fastening, constitute the curb plate subassembly as shown in fig. 6, and when the panel beating resonant piece 2 joint was on rectangle draw-in groove 103, leave 0.05 mm's clearance between strip joint 202 and the rectangle draw-in groove 103 of panel beating resonant piece 2, so as to be convenient for the welding.

As shown in fig. 7, a partition plate 8 located between the upper layer and the lower layer of the metal plate resonator plate 2 is further arranged in the metal cavity 1, a gap for accommodating the connecting arm 204 is reserved between the partition plate 8 and the other side plate of the metal cavity 1, a positioning connector 802 is arranged at the outer end of the partition plate 8, L-shaped positioning grooves 803 are formed in two ends of the positioning connector 802, positioning holes 102 connected with the positioning connector 802 in a clamped mode are further formed in the side plate 101 of the side plate assembly, the side plate assembly is connected with the metal cavity 1 through the clamping connection of the positioning holes 102 and the positioning connector 802, and a gap of 0.05mm is reserved between the positioning connector 802 and the positioning holes 102 so as to be welded and fixed. After the side plate assembly is assembled, the notch reserved on the side surface of the metal cavity 1 is sealed by the side plate 101 and is welded and fixed.

The debugging apron 3 set up on metal cavity 1's upper and lower surface to be parallel with two faces of panel beating resonant chip 2, transfer spiral shell subassembly 4 and install on debugging apron 3.

As in embodiment 1, the side wall of the metal cavity 1 is provided with a PIN assembly 7.

The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the specific embodiments of the present invention can be modified or substituted with equivalents with reference to the above embodiments, and any modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims to be appended.

Claims

1. The utility model provides a miniaturized metal cavity filter, includes metal cavity, panel beating resonance piece, debugging apron and transfers spiral shell subassembly, its characterized in that: the metal cavity is provided with a clamping body used for clamping the metal plate resonance piece, the metal plate resonance piece is provided with a clamping groove or a clamping joint, the clamping body is provided with a clamping joint matched with the clamping groove on the metal plate resonance piece or a clamping joint matched with the clamping groove on the metal plate resonance piece, and the clamping groove and the clamping joint are welded and fixed.

2. The miniaturized metal cavity filter of claim 1, wherein: the middle part of panel beating resonant chip is equipped with C shape draw-in groove, is equipped with the baffle in the metal cavity, and baffle one end is connected with metal cavity's lateral wall, leaves the clearance that holds panel beating resonant chip limit portion between another lateral wall of relative other end and metal cavity, and the baffle is the stair structure, as the joint body, the part is as inserting above the step on the baffle the joint of C shape draw-in groove connects.

3. The miniaturized metal cavity filter of claim 2, wherein: the debugging cover plate is arranged on the upper surface of the metal cavity and is parallel to the metal plate resonance sheet, and the screw adjusting assembly is arranged on the debugging cover plate.

4. The miniaturized metal cavity filter of claim 2, wherein: and a PIN needle assembly is arranged on the side wall of the metal cavity.

5. The miniaturized metal cavity filter of claim 1, wherein: the metal plate resonance sheet is provided with two layers of plate surfaces which are parallel up and down, the upper layer of plate surface and the lower layer of plate surface are connected through a connecting arm on the side surface, the same end of the two plate surfaces is provided with a clamping joint, the side surface of the clamping joint is provided with a limiting part for limiting the depth of the clamping joint inserted into the clamping groove, and the limiting part is arranged on the main body of the metal plate resonance sheet; one side plate of the metal cavity is used as the clamping body, and a clamping groove used for being clamped with the metal plate resonance piece is formed in the side plate; still be equipped with a baffle that is located between the metal plate resonance piece two-layer from top to bottom in the metal cavity, leave between the opposite side board of baffle and metal cavity and hold the clearance of linking arm, the tip of baffle and the joint have another draw-in groove joint on the curb plate of metal plate resonance piece.

6. The miniaturized metal cavity filter of claim 5, wherein: the side plate for connecting the metal plate resonance sheet is a stamping part formed by stamping and is welded in a notch on one side of the metal cavity.

7. The miniaturized metal cavity filter of claim 5, wherein: a gap of 0.05mm is reserved between the clamping joint on the clamping groove and the metal plate resonance sheet so as to facilitate welding.

8. The miniaturized metal cavity filter of claim 5, wherein: a gap of 0.05mm is reserved between the clamping joint at the end part of the clamping groove and the partition plate so as to facilitate welding.

9. The miniaturized metal cavity filter of claim 5, wherein: the debugging cover plate is arranged on the upper surface and the lower surface of the metal cavity and is parallel to two plate surfaces of the metal plate resonance sheet, and the screw adjusting component is arranged on the debugging cover plate.

10. The miniaturized metal cavity filter of claim 5, wherein: and a PIN needle assembly is arranged on the side wall of the metal cavity.