A method and filter for reducing tuning debris of a filter

Abstract

The present application relates to a kind of method and filter for reducing the tuning debris of filter, filter includes the cavity of one end opening, cover plate installed in the open end of cavity, resonant column is installed to the cavity, and screw rod;Cover plate is provided with through hole, screw rod passes through through hole and extends into the cavity;The hole wall of through hole is provided with the threaded portion matched with the screw rod;The filter is also provided with debris stripping mechanism and debris collection mechanism, debris stripping structure includes the concave region in the hole wall, and the intersection of concave region and threaded portion forms stripping portion, and stripping portion is used to strip the debris of screw rod when the screw rod is rotated relative to the cover plate;Debris collection mechanism is set to cover plate, including collection part, and collection part is communicated or connected with concave region, for collecting the debris being stripped.The present application can collect the debris of screw rod rotation tuning, reduce the debris falling into the cavity of filter, so as to improve the performance of filter.

Description

[Technical Field]

[0001] This invention relates to filters, and more particularly to a method and filter for reducing tuning debris in filters. [Background Technology]

[0002] A filter achieves frequency selection by adjusting its passband, suppressing unwanted frequency signals and selecting those that have been suppressed. During filter tuning, the tuning levers are rotated clockwise or counterclockwise to change the depth at which they enter the resonant cavity, thus adjusting the filter's passband until all tuning levers are adjusted to a suitable depth within the filter's resonant cavity, thereby achieving the required passband performance.

[0003] However, friction occurs between the threads of the tuning rod and the threaded hole of the cover plate, generating debris. This debris falls into the resonant cavity, causing a deterioration in filter performance. Therefore, a solution is urgently needed to address the technical problem of reducing tuning debris in filters. [Summary of the Invention]

[0004] To address the aforementioned technical problems, the present invention aims to provide a method and filter capable of reducing tuning debris in a filter.

[0005] The first aspect of the present invention provides a method for reducing tuning debris in a filter, the filter comprising a cavity with one open end, a cover plate mounted on the open end of the cavity, a resonant post mounted in the cavity, and a screw; the cover plate is provided with a through hole, and the screw passes through the through hole and extends into the cavity; the method comprises the following steps:

[0006] A threaded portion that mates with the screw is provided on the wall of the through hole;

[0007] Constructing a debris removal structure includes providing a recessed region in the hole wall, the recessed region intersecting with the threaded portion;

[0008] Rotate the screw to use the intersection of the concave region and the threaded portion as a peeling section to peel off the debris from the screw;

[0009] A debris collection mechanism is provided on the cover plate to collect the stripped debris through the collection part of the debris collection mechanism.

[0010] Preferably, a first blind groove is recessed from the top surface of the cover plate to form a first blind groove, which communicates with the through hole and forms the first peeling part at the intersection, and the bottom of the first blind groove serves as a first collecting part.

[0011] Preferably, a second blind groove is provided on the wall of the through hole, the opening of the second blind groove faces the through hole, and the opening of the second blind groove forms a second peeling part; the bottom of the second blind groove serves as a second collecting part.

[0012] A second aspect of the present invention provides a filter, comprising a cavity with one open end, a cover plate mounted on the open end of the cavity, a resonant post mounted in the cavity, and a screw; the cover plate is provided with a through hole, the screw passing through the through hole and extending into the cavity; the wall of the through hole is provided with a threaded portion that mates with the screw; the filter further comprises a debris stripping mechanism and a debris collecting mechanism, the debris stripping mechanism including a concave region located on the wall of the hole, the intersection of the concave region and the threaded portion forming a stripping portion, the stripping portion being used to strip debris from the screw when the screw rotates relative to the cover plate; the debris collecting mechanism is disposed on the cover plate and includes a collecting portion, the collecting portion communicating with or connected to the concave region, for collecting the stripped debris.

[0013] Preferably, the peeling portion includes a first peeling portion; the cover plate is recessed downward from its top surface to form a first blind groove, the first blind groove communicates with the through hole and forms a first peeling portion at the intersection.

[0014] Preferably, the collecting part includes a first collecting part; the cover plate is recessed downward from its top surface to form a first blind groove, the first blind groove is connected to the through hole; the bottom of the first blind groove serves as the first collecting part.

[0015] Preferably, the bottom of the first blind groove has an inclined surface, so that the bottom is higher near the hole wall of the through hole and lower away from the hole wall of the through hole.

[0016] Preferably, there are several first blind slots arranged circumferentially along the through hole.

[0017] Preferably, the depth of the first blind groove is less than the thickness of the cover plate by 0.1 mm.

[0018] Preferably, the inner diameter of the through hole in the first stripping section is slightly smaller than the outer diameter of the screw.

[0019] Preferably, it further includes a nut that engages with the screw thread, the nut being located outside the cover plate to reinforce and lock the screw.

[0020] Preferably, the recessed region further includes a second blind groove, the opening of which faces the through hole.

[0021] The present invention provides a debris collection mechanism that cooperates with the debris stripping structure on the wall of the through hole of the cover plate. The collection part of the debris collection mechanism can collect the debris stripped by the debris stripping structure. In this way, the debris of the screw rotation tuning is collected, reducing the debris falling into the cavity of the filter, thereby improving the performance of the filter. [Attached Image Description]

[0022] Figure 1 This is a cross-sectional schematic diagram of the filter provided in Embodiment 1 of the present invention;

[0023] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the cover plate of the filter shown;

[0024] Figure 3 This is a flowchart illustrating the method for reducing tuning debris in a filter according to Embodiment 2 of the present invention.

Detailed Implementation Methods

[0025] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] refer to Figure 1 The present invention provides a filter 100, comprising a cavity 10 open at one end, a cover plate 20 installed at the open end of the cavity 10, a resonant post 30 installed inside the cavity 10, and a screw 50. The cover plate 20 is provided with a through hole 21, through which the screw 50 passes and extends into the cavity 10. Specifically, the wall of the through hole 21 is provided with a threaded portion that mates with the screw 50.

[0028] In this embodiment, the filter 100 also includes a debris stripping mechanism and a debris collection mechanism. The debris stripping mechanism includes a recessed region located on the wall of the through-hole 21, with a stripping portion formed at the intersection of this recessed region and the threaded portion of the screw 50. The stripping portion is used to strip debris from the screw 50 when the screw 50 rotates relative to the cover plate 20. The debris collection mechanism is used to collect the debris stripped from the screw 50 by the debris stripping mechanism. Specifically, the debris collection mechanism is disposed on the cover plate 20 and includes a collection portion. The collection portion communicates with or is connected to the recessed region. This reduces the amount of debris generated during filter tuning operations falling into the cavity 10, reducing the impact of debris on filter performance and thus improving filter performance.

[0029] Preferably, the cover plate 20 has a first blind groove 71 recessed downward from its top surface; and the first blind groove 71 communicates with the through hole 21. That is, the recessed area of ​​the hole wall of the through hole 21 includes the first blind groove 71.

[0030] There can be multiple peeling sections and collecting sections. The peeling section includes a first peeling section; the collecting section includes a first collecting section. In this embodiment, the first peeling section is formed at the intersection of the first blind groove 71 and the threaded portion of the screw 50; the bottom of the first blind groove 71 serves as the first collecting section.

[0031] More preferably, the bottom of the first blind groove 71 has an inclined surface, which makes the bottom of the first blind groove 71 higher near the hole wall of the through hole 21 and lower away from the hole wall of the through hole 21. In this way, when the screw 50 rotates relative to the cover plate 20, the debris from the screw 50 can be removed away from the first peeling part; and the inclined surface also allows the first blind groove 71 to accommodate more debris, further reducing the amount of debris falling into the cavity 10.

[0032] Understandably, the depth of the first blind groove 71 is less than the thickness of the cover plate by 0.1 mm. This maximizes the accommodating space of the first blind groove 71 as the first collecting section. Preferably, the inner diameter of the through hole 21 in the first peeling section is slightly smaller than the outer diameter of the screw 50. This allows the first peeling section to collect all debris generated by the screw 50 without it falling into the cavity 10 through the gap between the through hole 21 and the screw 50.

[0033] Furthermore, there are several first blind grooves 71 arranged circumferentially along the through hole 21. This increases the number of first blind grooves 71 at the bottom and the number of first collection parts, further increasing the space for accommodating debris and reducing the amount of debris falling into the cavity 10.

[0034] Furthermore, the stripping section also includes a second stripping section; the collecting section also includes a second collecting section. The concave region of the wall of the through hole 21 also includes a second blind groove 211. The opening of the second blind groove 211 faces the through hole 21. Thus, the opening of the concave region (i.e., the opening of the second blind groove 211) can also serve as a second stripping section to strip debris from the threaded portion of the screw 50; the recess of the concave region (i.e., the bottom of the groove of the second blind groove 211) can also serve as a second collecting section to collect the debris stripped from the opening of the second blind groove 211. Understandably, there can also be multiple second blind grooves 211, and several or more second blind grooves 211 are discretely distributed along the wall of the through hole 21. The discrete distribution of multiple second blind grooves 211 can ensure effective stripping of debris from the threaded portion of the screw 50, while increasing the number of bottoms of the second blind grooves 211, increasing the number of second collecting sections, further increasing the space for accommodating debris, and reducing debris falling into the cavity 10. That is, the concave region of the wall of the through hole 21 also includes a second blind groove 211.

[0035] Specifically, the bottom of the second blind groove 211 is also provided with an inclined surface, which makes the bottom of the second blind groove 211 higher near the hole wall of the through hole 21 and lower away from the hole wall of the through hole 21. In this way, when the screw 50 rotates relative to the cover plate 20, the debris from the peeling screw 50 can be kept away from the second peeling part; and the inclined surface also allows the second blind groove 211 to accommodate more debris, further reducing the amount of debris falling into the cavity 10.

[0036] In this embodiment, a nut 80 that engages with the threaded screw 50 is also included. The nut 80 is located on the outside of the cover plate 20 to reinforce and lock the screw 50. Understandably, the cover plate 20 has a first blind groove 71 recessed downward from its top surface to collect debris generated by the rotation of the screw 50 relative to the nut 80.

[0037] Example 2

[0038] This embodiment provides a method for reducing tuning debris in the filter 100 of Embodiment 1 described above. The method includes the following steps:

[0039] The filter 100 in Embodiment 1 includes a cavity 10 with one open end, a cover plate installed at the open end of the cavity 10, a resonant post 30 installed inside the cavity 10, and a screw 50 extending into the cavity 10. A through hole 21 is provided in the cover plate 20 so that the screw 50 passes through the through hole 21 and extends into the cavity 10; and a threaded portion that mates with the screw is provided on the wall of the through hole 21.

[0040] The debris removal structure is constructed by providing a recessed region on the wall of the through hole 21, which intersects with the threaded portion.

[0041] Rotate the screw 50 and use the intersection of the concave area and the threaded part as the peeling part to peel off the debris from the screw 50;

[0042] A debris collection mechanism is provided on the cover plate 20, and the debris detached from the peeling part is collected by the collection part of the debris collection mechanism.

[0043] Specifically, the peeling section includes a first peeling section and a second peeling section; the collecting section includes a first collecting section and a second collecting section.

[0044] Preferably, a first blind groove 71 is recessed downwards from the top surface of the cover plate 20. The first blind groove 71 communicates with the through hole 21 and forms a first stripping section at the intersection. The bottom of the first blind groove 71 serves as a first collecting section. In this way, the debris from the rotational tuning of the screw 50 stripped off by the first stripping section is collected by the first collecting section, reducing the tuning debris of the filter.

[0045] Furthermore, a second blind groove 211 is provided on the wall of the through hole 21. The opening of the second blind groove 211 faces the through hole 21. Thus, the opening of the second blind groove 211 serves as a second peeling part to peel off debris from the threaded portion of the screw 50; the bottom of the second blind groove 211 serves as a second collecting part to collect the debris peeled off from the opening of the second blind groove 211.

[0046] Understandably, the concave region of the wall of the through hole 21 includes a first blind groove 71 and a second blind groove 211. Preferably, the bottom of the first blind groove 71 and the bottom of the second blind groove 211 are both provided with inclined surfaces. These inclined surfaces make the bottom of the first blind groove 71 and the bottom of the second blind groove 211 higher near the wall of the through hole 21 and lower away from the wall of the through hole 21. In this way, when the screw 50 rotates relative to the cover plate 20, the debris from peeling the screw 50 can be kept away from the first peeling part and the second peeling part; and the inclined surfaces also allow the first blind groove 71 and the second blind groove 211 to accommodate more debris, further reducing the amount of debris falling into the cavity 10.

[0047] The above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, such as combining different features in various embodiments, and these all fall within the protection scope of the present invention.

Claims

1. A method for reducing tuning debris in a filter, the filter comprising a cavity open at one end, a cover plate mounted on the open end of the cavity, a resonant post mounted into the cavity, and a screw; the cover plate having a through hole, the screw passing through the through hole and extending into the cavity; characterized in that, The method includes the following steps: A threaded portion that mates with the screw is provided on the wall of the through hole; A debris removal structure is constructed, including a recessed region on the hole wall, the recessed region intersecting with the threaded portion; Rotate the screw to use the intersection of the concave region and the threaded portion as a peeling section to peel off the debris from the screw; A debris collection mechanism is provided on the cover plate, and the debris detached from the peeling part is collected by the collection part of the debris collection mechanism; A first blind groove is formed by recessing the cover plate from its top surface downwards; the bottom of the first blind groove has an inclined surface, so that the bottom is higher near the hole wall of the through hole and lower away from the hole wall of the through hole; The first blind groove is connected to the through hole, and a first peeling part is formed at the intersection. The bottom of the first blind groove serves as a first collecting part.

2. The method for reducing tuning debris in a filter as described in claim 1, characterized in that, A second blind groove is provided on the wall of the through hole, the opening of the second blind groove faces the through hole, and the opening of the second blind groove forms a second peeling part; the bottom of the second blind groove serves as a second collecting part.

3. A filter, comprising a cavity open at one end, a cover plate mounted on the open end of the cavity, a resonant post mounted into the cavity, and a screw; the cover plate having a through hole, the screw passing through the through hole and extending into the cavity; characterized in that, The wall of the through hole is provided with a threaded portion that mates with the screw. The filter is also provided with a debris stripping structure and a debris collection mechanism. The debris stripping structure includes a concave region located on the wall of the hole. The intersection of the concave region and the threaded portion forms a stripping section. The stripping section is used to strip the debris from the screw when the screw rotates relative to the cover plate. The debris collection mechanism is disposed on the cover plate and includes a collection section. The collection section communicates with or is connected to the concave region and is used to collect the stripped debris. The cover plate is recessed downward from its top surface to form a first blind groove. The bottom of the first blind groove has an inclined surface, so that the bottom is higher near the wall of the through hole and lower away from the wall of the through hole. The first blind groove communicates with the through hole and forms a first stripping section at the intersection. The bottom of the first blind groove serves as a first collection section.

4. The filter as described in claim 3, characterized in that, The first blind groove consists of several segments arranged circumferentially along the through hole.

5. The filter as described in claim 3, characterized in that, It also includes a nut that engages with the screw thread, the nut being located outside the cover plate to reinforce and lock the screw.

6. The filter as described in claim 3, characterized in that, The recessed area also includes a second blind groove, the opening of which faces the through hole.

Images