Double-cavity filtering structure and filter

Abstract

The utility model relates to a double-cavity filtering structure and a filter, the double-cavity filtering structure comprises two first shells, resonant cavities are arranged at two sides of the interior of the first shells, and two side walls of the interior of each resonant cavity are fixedly connected with isolation plates in sequence. The utility model relates to the technical field of double-cavity filters. According to the double-cavity filtering structure and the filter, the filter is formed by fixedly connecting the two first shells with the same specification, so that when the filter is manufactured, the first shells, the sealing table and the positioning ring need to be subjected to mold opening, only the first shells exist in a relatively complex model, and mold opening is relatively simple when the sealing table and the positioning ring are subjected to mold opening; therefore, compared with a double-cavity filter in which the bottom cavity and the upper cover plate need to be subjected to mold opening in the prior art, the mold opening cost of both the bottom cavity and the upper cover plate is far greater than that of the sealing table and the positioning ring, so that the mold opening cost for manufacturing the filter can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dual-cavity filters, in particular to a dual-cavity filter structure and a filter. Background Art

[0002] A dual-cavity filter, also known as a dual-box filter, is a device that performs filtering in two boxes. Structurally, it consists of two independent chambers, each with a filter network, which are connected by coupling capacitors and share one input and one output.

[0003] In the prior art, a dual-cavity filter is generally composed of a bottom cavity and an upper cover plate, which requires mold opening of the bottom cavity and the upper cover plate during manufacture, thereby greatly increasing the cost of filter manufacture. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a dual-cavity filter structure and a filter so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A dual-cavity filtering structure includes a first shell, wherein two first shells are provided, resonant cavities are provided on both sides of the interior of the first shell, and isolation plates are fixedly connected to the inner side walls of the resonant cavity in sequence, internal threaded through holes are provided at both ends of the isolation plate and at the four corners of the resonant cavity, countersunk holes are provided on the bottom wall of the resonant cavity and at positions located between two adjacent isolation plates, and sealing platforms and positioning rings are respectively provided inside the countersunk holes of the two first shells.

[0007] Furthermore, the two first shells are buckled relative to each other to form a closed cavity at the edge.

[0008] Furthermore, a threaded connecting rod is arranged inside the internal threaded through hole.

[0009] Furthermore, the outer walls of the sealing platform and the positioning ring are both provided with sealing rings, and the inner ring wall of the positioning ring is provided with a sealing gasket.

[0010] A filter comprises the dual-cavity filter structure.

[0011] Furthermore, the two first shells are buckled relative to each other to form the filter with the edges sealed, a resonance rod is fixedly installed on the top of the sealing platform, a coordination screw passing through the positioning ring is arranged on the top of the resonance rod, and the coordination screw is sealingly connected to the positioning ring through the sealing gasket.

[0012] In summary, the present invention includes at least one of the following beneficial technical effects:

[0013] 1. A dual-cavity filter structure and filter, the filter is composed of two first shells of the same specification fixedly connected to each other, so when making the filter, it is only necessary to open the mold for the first shell, the sealing platform and the positioning ring, and the more complex model only has the first shell, and it is relatively simple to open the mold for the sealing platform and the positioning ring. Therefore, compared with the dual-cavity filter in the prior art that needs to open the mold for the bottom cavity and the upper cover plate, the mold opening cost of both the bottom cavity and the upper cover plate is much greater than that of the sealing platform and the positioning ring, so the mold opening cost of the filter production can be effectively reduced;

[0014] 2. This dual-cavity filtering structure and filter, the filter is composed of two first shells of the same specification fixedly connected to each other. Therefore, when making the filter, it is only necessary to align the two first shells with each other, and the two first shells can be fixedly connected to each other through internal threaded through holes and threaded connecting rods, which can effectively improve the convenience of the filter during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The utility model is a double-cavity filter structure and a schematic diagram of the filter structure.

[0017] Figure 2 The utility model is a double-cavity filter structure and a structural explosion diagram of the filter.

[0018] Figure 3 This is a schematic diagram of the structure of a dual-cavity filter structure and the first housing of the filter of the utility model.

[0019] Figure 4 It is a cross-sectional structural schematic diagram of a dual-cavity filter structure and a first housing of the filter of the utility model.

[0020] In the figure, 11, the first shell; 12, the resonance cavity; 13, the isolation plate; 14, the internal threaded through hole; 15, the countersunk hole; 16, the sealing platform; 17, the positioning ring; 18, the threaded connecting rod; 21, the resonance rod; 22, the coordination screw. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Embodiment 1:

[0023] Reference Figure 1-Figure 4 The utility model discloses a dual-cavity filtering structure and a filter, comprising a first shell 11, wherein the first shell 11 is provided with two, a resonant cavity 12 is provided on both sides of the interior of the first shell 11, and isolation plates 13 are fixedly connected to the inner side walls of the resonant cavity 12 in sequence, and internal threaded through holes 14 are provided at both ends of the isolation plate 13 and the four corners of the resonant cavity 12, and a countersunk hole 15 is provided on the bottom wall of the resonant cavity 12 and at a position between two adjacent isolation plates 13, and a sealing platform 16 and a positioning ring 17 are respectively provided inside the countersunk holes 15 of the two first shells 11.

[0024] In this embodiment, when assembling the filter, the sealing platforms 16 are firstly embedded into the countersunk holes 15 one by one, and the resonance rods 21 are inserted into the top of the sealing platforms 16, and then the positioning rings 17 are embedded into the countersunk holes 15 of the other first housings 11 one by one. At this time, the two first housings 11 are aligned with each other, and the two first housings 11 are fixedly connected by the threaded connecting rods 18 and the internal threaded through holes 14, and then the coordination screws 22 are inserted from the positioning rings 17 and screwed into the interior of the resonance rods 21;

[0025] In summary, the filter is composed of two first shells 11 of the same specifications that are fixedly connected to each other. Therefore, when making the filter, it is necessary to open the mold for the first shell 11, the sealing platform 16 and the positioning ring 17. The more complex model only has the first shell 11, and it is relatively simple to open the mold for the sealing platform 16 and the positioning ring 17. Therefore, compared with the double-cavity filter in the prior art that needs to open the mold for the bottom cavity and the upper cover plate, the mold opening cost of both the bottom cavity and the upper cover plate is much greater than that of the sealing platform 16 and the positioning ring 17, so the mold opening cost of the filter production can be effectively reduced.

[0026] In a further preferred embodiment of the present invention, Figure 1-4 As shown, the two first shells 11 are buckled relative to each other to form a closed cavity at the edge.

[0027] In this embodiment, the two first shells 11 are connected together and the two resonant cavities 12 correspond to each other. At this time, the two first shells 11 are connected together to form a filter, and the interior of the filter has two closed cavities for installing the resonant rod 21.

[0028] In a further preferred embodiment of the present invention, Figure 1-4 As shown, a threaded connecting rod 18 is disposed inside the internal threaded through hole 14 .

[0029] In this embodiment, the two first housings 11 are connected by a threaded connecting rod 18 .

[0030] In a further preferred embodiment of the present invention, Figure 1-4 As shown, the outer walls of the sealing platform 16 and the positioning ring 17 are both provided with sealing rings, and the inner ring wall of the positioning ring 17 is provided with a sealing gasket.

[0031] In this embodiment, the sealing ring is provided to improve the tightness and sealing of the connection between the sealing platform 16 and the positioning ring 17 and the countersunk hole 15, and the sealing gasket is provided to improve the sealing between the inner ring wall of the positioning ring 17 and the coordinating screw 22 when the coordinating screw 22 is inserted into the interior of the positioning ring 17.

[0032] Embodiment 2:

[0033] Reference Figure 1-Figure 4 , a filter disclosed by the utility model.

[0034] In this embodiment, the filter is formed by covering two first housings 11 during assembly, so the filter has two closed cavities.

[0035] In a further preferred embodiment of the present invention, Figure 1-4 As shown, the two first shells 11 are relatively buckled to form the filter with the edges sealed, a resonance rod 21 is fixedly installed on the top of the sealing platform 16, and a coordination screw 22 passing through the positioning ring 17 is provided on the top of the resonance rod 21, and the coordination screw 22 is sealed and connected to the positioning ring 17 through the sealing gasket.

[0036] In this embodiment, the resonant frequency is adjusted by setting the resonant rod 21 and the coordination screw rod 22 .

[0037] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual-cavity filter structure, characterized in that: The invention comprises a first shell (11), wherein two first shells (11) are provided, a resonant cavity (12) is provided on both sides of the interior of the first shell (11), isolation plates (13) are fixedly connected to the inner side walls of the resonant cavity (12) in sequence, internal threaded through holes (14) are provided at both ends of the isolation plate (13) and at four corners of the resonant cavity (12), a countersunk hole (15) is provided on the bottom wall of the resonant cavity (12) and at a position between two adjacent isolation plates (13), and a sealing platform (16) and a positioning ring (17) are provided inside the countersunk holes (15) of the two first shells (11), respectively.

2. A dual-cavity filter structure according to claim 1, characterized in that: The two first shells (11) are buckled relative to each other to form a closed cavity at the edge.

3. A dual-cavity filter structure according to claim 2, characterized in that: A threaded connecting rod (18) is arranged inside the internal threaded through hole (14).

4. A dual-cavity filter structure according to claim 3, characterized in that: The outer walls of the sealing platform (16) and the positioning ring (17) are both provided with sealing rings, and the inner ring wall of the positioning ring (17) is provided with a sealing gasket.

5. A filter, characterized in that: The filter comprises the dual-cavity filter structure as claimed in any one of claims 1 to 4.

6. A filter according to claim 5, characterized in that: The two first shells (11) are buckled relative to each other to form the filter with its edges sealed, a resonance rod (21) is fixedly mounted on the top of the sealing platform (16), a coordination screw (22) passing through the positioning ring (17) is arranged on the top of the resonance rod (21), and the coordination screw (22) is sealedly connected to the positioning ring (17) via the sealing gasket.

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