Supporting structure for filter

Abstract

The utility model discloses a supporting structure for a filter, which is arranged between a filtering cavity and a resonant cavity and comprises a positioning part and a limiting part, the positioning part is fixedly connected with the limiting part, and one side of the positioning part is embedded into one of the side walls of the port of the filtering cavity; a limiting groove matched with the low pass is formed in the surface of the limiting part, and the periphery of the end, entering the resonant cavity, of the low pass is embedded into the limiting groove. According to the utility model, the positioning part is embedded into one of the side walls of the filtering cavity to stabilize the position of the limiting part in the filtering cavity, so that interference fit between the positioning part and the limiting part and the filtering cavity is avoided, and the position of the low pass in the filtering cavity is supported and limited.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to a supporting structure for filters. Background Art

[0002] Traditionally, the support body used for the low-pass filter in the filter is usually fixed in the cavity in the form of a machined arc groove. This support body can prevent the low-pass from shifting, thereby affecting the normal operation of the filter. At present, in the design of the filter, the spacing between the two side walls of the cavity needs to be preset with a certain tolerance during the production process, and the performance of the filter is related to the actual size of the product. Since the support body also has a certain tolerance during preparation, in order to install this type of support body, the existing filter has to increase the size of the cavity to avoid the support body from forming an interference fit with the cavity after installation, thereby affecting the transmission of the electromagnetic signal. Therefore, the processing volume of the entire filter has to be increased, and the crimping effect of the support body is still not ideal. Utility Model Content

[0003] In order to solve the problem described in the background technology that the processing amount of the entire filter has to be increased and the crimping effect is still not ideal, the utility model proposes the following technical solution:

[0004] A support structure for a filter, arranged between a filter cavity and a resonance cavity, comprising: a positioning portion and a limiting portion; the positioning portion and the limiting portion are fixedly connected, one side of the positioning portion is embedded in one of the side walls of the port of the filter cavity; a limiting groove matching a low-pass filter is provided on the surface of the limiting portion, and the outer periphery of one end of the low-pass filter entering the resonance cavity is embedded in the limiting groove.

[0005] Wherein, the interior of the limiting groove has a variable diameter structure.

[0006] Furthermore, a positioning groove extending along the depth direction of the filter cavity is provided on the surface of the positioning portion, and the positioning groove is embedded in one of the side walls of the filter cavity.

[0007] Furthermore, the limiting groove includes an upper portion and a lower portion, and a side wall spacing of the lower portion is greater than a side wall spacing of the upper portion.

[0008] Furthermore, the inner side wall of the lower portion is arc-shaped.

[0009] Beneficial effect: The utility model stabilizes the position of the limiting part in the filter cavity by embedding the positioning part into one of the side walls of the filter cavity, thereby avoiding interference fit between the positioning part and the limiting part and the filter cavity, and at the same time supports and limits the position of the low-pass filter in the filter cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the installation structure of the support body in the filter in the background technology;

[0011] Figure 2 This is a schematic diagram of an installation structure of a support structure for a filter according to an embodiment of the utility model;

[0012] Figure 3 A structural schematic diagram of a support structure for a filter according to an embodiment of the utility model. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0014] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0015] Figure 1 It is a schematic diagram of the installation structure of the support body in the filter in the background technology.

[0016] In order to more clearly demonstrate the effect of the present invention, the mounting structure of the support body 6 described in the background technology is now further described. Figure 1 , the filter cavity 1 in the filter is connected with the resonant cavity 2. Among them, the filter cavity 1 is narrow and long as a whole and has a turning port, in which a low-pass 5 is arranged. The low-pass 5 turns along the filter cavity 1 after being embedded in the support body 6 in the filter cavity 1 and is connected to the resonant column through the port copper sheet 7. In this structure, the two sides of the support body 6 need to be respectively against the inner walls of the two sides of the filter cavity 1 to limit the low-pass 5, otherwise the low-pass 5 will be displaced during the operation of the filter, thereby interfering with the normal operation. Under this restriction, the processing amount of the support body 6 and the filter cavity 1 needs to be strictly controlled, otherwise the interference fit between the support body 6 and the filter cavity 1 is likely to occur.

[0017] Figure 2 The figure is a schematic diagram of an installation structure of a support structure for a filter according to an embodiment of the utility model. Figure 3 A structural schematic diagram of a support structure for a filter according to an embodiment of the utility model.

[0018] Reference Figure 2According to an embodiment of the utility model, a support structure for a filter includes: a positioning portion 3 and a limiting portion 4. The positioning portion 3 and the limiting portion 4 are fixedly connected, and one side of the positioning portion 3 is embedded in one of the side walls of the port of the filter cavity 1. Figure 3 A limiting groove 41 matching the low-pass filter 5 is provided on the surface of the limiting portion 4 , and the outer periphery of one end of the low-pass filter 5 entering the resonance cavity 2 is embedded in the limiting groove 41 .

[0019] Specifically, the limiting groove 41 includes an upper portion 411 and a lower portion 412, and a variable diameter structure is provided in the limiting groove 41. The spacing between the two side walls located at the lower portion 412 is greater than the spacing between the two side walls located at the upper portion 411, and the side walls of the lower portion 412 are arc-shaped. When the low-pass filter 5 passes through the limiting groove 41, the outer peripheral surface of the low-pass filter 5 is limited in the lower portion 412. The surface of the positioning portion 3 is provided with a positioning groove 42 extending along the depth direction of the filter cavity 1, and the positioning groove 42 is embedded in one of the side walls at the turning end of the filter cavity 1.

[0020] After the positioning portion 3 is embedded in the side wall of the filter cavity 1, the bottom of the positioning portion 3 and the bottom of the limiting portion 4 are both against the bottom of the filter cavity 1, and the positioning portion 3 is limited by one of the side walls of the filter cavity 1, thereby stabilizing the position of the limiting portion 4 in the filter cavity 1. At the turning point of the filter cavity 1, one of the inner walls of the filter cavity 1 is disconnected, and the other turning point of the inner wall of the filter cavity 1 extends. After the positioning groove 42 is engaged with the disconnected inner wall of the filter cavity 1, the inner walls on both sides of the positioning groove 42 are respectively against the two sides of the disconnected inner wall of the filter cavity 1. After changing the existing limiting method of the support body 6, the other side of the support body 6 may not be against the inner wall of the filter cavity 1, thereby greatly reducing the tolerance requirements of the support body 6 and the filter cavity 1 during the manufacturing process.

[0021] In summary, the utility model stabilizes the position of the limiting part in the filter cavity by embedding the positioning part into one of the side walls of the filter cavity, thereby avoiding interference fit between the positioning part and the limiting part and the filter cavity, and at the same time supports and limits the position of the low-pass filter in the filter cavity.

[0022] The above description is of certain embodiments of the invention. Other embodiments are within the scope of the following claims.

[0023] The terms "exemplary," "example," and the like used throughout this specification mean "used as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0024] The optional implementation modes of the embodiments of the utility model are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the utility model are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the utility model, the technical scheme of the embodiments of the utility model can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the utility model.

[0025] The above description of the contents of this specification is provided to enable any person of ordinary skill in the art to implement or use the contents of this specification. Various modifications to the contents of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the contents of this specification. Therefore, the contents of this specification are not limited to the examples and designs described herein, but are consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A support structure for a filter, arranged between a filter cavity (1) and a resonant cavity (2), characterized in that: include: A positioning portion (3) and a limiting portion (4); the positioning portion (3) and the limiting portion (4) are fixedly connected, and one side of the positioning portion (3) is embedded in one of the side walls of the port of the filter cavity (1); a limiting groove (41) matching the low-pass filter (5) is provided on the surface of the limiting portion (4), and the outer periphery of one end of the low-pass filter (5) entering the resonant cavity (2) is embedded in the limiting groove (41).

2. A support structure for a filter according to claim 1, characterized in that: The interior of the limiting groove (41) has a variable diameter structure.

3. A support structure for a filter according to claim 1, characterized in that: The surface of the positioning portion (3) is provided with a positioning groove (42) extending along the depth direction of the filter cavity (1), and the positioning groove (42) is embedded in one of the side walls of the filter cavity (1).

4. A support structure for a filter according to claim 2, characterized in that: The limiting groove (41) comprises an upper portion (411) and a lower portion (412), and the side wall spacing of the lower portion (412) is greater than the side wall spacing of the upper portion (411).

5. A support structure for a filter according to claim 4, characterized in that: The inner side wall of the lower portion (412) is arc-shaped.

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