Filter cover plate tuning structure
The filter cover plate tuning structure with a deformable adjustment mechanism addresses debris entry issues, ensuring stable and efficient tuning by maintaining a sealed environment, thereby improving intermodulation distortion performance.
Patent Information
- Application Number
- CN202422013327.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-16
AI Technical Summary
During the debugging process, existing filters are prone to debris entering the cavity, affecting performance and stability, resulting in a degradation of intermodulation performance.
A filter cover tuning structure is designed, including a tuning cover plate and a deformation adjustment mechanism. The spacing between the cover plate and the resonant rod is adjusted through the tuning screw and the hook structure, frequency adjustment is achieved, and debris are prevented from entering the cavity through a sealing design.
It effectively avoids debris entering the cavity during debugging, improves the pass rate and stability of intermodulation, and simplifies the debugging process.
Smart Images
Figure CN223109207U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of filters, and particularly relates to a filter cover tuning structure. Background Technique
[0002] A filter is a frequency selection device that can allow specific frequency components in a signal to pass through while greatly attenuating other frequency components. By utilizing this frequency selection function of the filter, interference noise can be filtered out or spectrum analysis can be performed.
[0003] With the rapid development of wireless communication technology, the market has increasingly strict requirements for the intermodulation performance and stability of communication base station equipment. When ordinary filters tune frequencies, debris is likely to enter the cavity, affecting the performance and service life of the filters. Currently, continuous research and exploration of various solutions to improve the intermodulation qualification rate and stability are needed. Content of the Utility Model
[0004] The technical object of the utility model is to provide a filter cover tuning structure, aiming to prevent debris from entering the cavity during the debugging process, avoid generating intermodulation, and improve the intermodulation qualification rate and stability.
[0005] To solve the above technical problems, the utility model is realized as follows. A filter cover tuning structure includes: a cavity and a tuning cover. The tuning cover is fixed on the opening side of the cavity. A resonant rod is arranged in the cavity. The feature is that a deformation adjustment mechanism is arranged on the outer side of the tuning cover. The deformation adjustment mechanism and the resonant rod are oppositely arranged on both sides of the tuning cover, and the deformation adjustment mechanism adjusts the distance between the tuning cover and the resonant rod.
[0006] Further, the thickness of the middle part of the tuning cover is smaller than that of the surrounding part, and the deformation adjustment mechanism is arranged in the middle part of the tuning cover. A thin wall is formed in the middle part of the tuning cover, which is easy to deform and convenient for adjustment.
[0007] Further, the deformation adjustment mechanism includes a tooling cover plate and a tuning screw. The tooling cover plate is fixed on the side of the tuning cover away from the cavity. The tuning screw is threadedly connected to the tooling cover plate, and one end of the tuning screw is in contact with the tuning cover.
[0008] Further, one end of the tuning screw has a hanging protrusion extending radially outward. A hanging structure is arranged on the tuning cover, and the hanging protrusion is arranged inside the hanging structure. Through the cooperation of the hanging protrusion and the hanging structure, the tuning cover can be lifted upward to achieve two-way adjustment.
[0009] Further, the hanging structure includes a fixing post and a hanging screw. The fixing post is fixedly arranged on the outer side of the tuning cover plate. The hanging screw is threadedly connected to the fixing post, and the diameter of the head of the hanging screw is larger than the diameter of the fixing post. The hanging protrusion is arranged between the tuning cover plate and the head of the hanging screw.
[0010] Further, at least two of the hanging screws are evenly arranged around the tuning screw.
[0011] Further, the tooling cover plate is detachably arranged on the opening side of the cavity.
[0012] Further, an outer shell is arranged on the outer side of the cavity, and the tooling cover plate is fixed on the outer shell.
[0013] The tooling cover plate is detachable from the cavity. After the debugging is completed, the tooling cover plate, the tuning screw and the hanging screw can all be removed from the cavity and the tuning cover plate.
[0014] Further, one end face of the tuning screw is smoothly arranged;
[0015] Or one end of the tuning screw has a pressing protrusion that presses on the tuning cover plate.
[0016] Further, the pressing protrusion is annular, or a plurality of the pressing protrusions are arranged in an annular pattern.
[0017] Compared with the prior art, the beneficial effects of the filter cover plate tuning structure in the present utility model are as follows:
[0018] The tuning cover plate seals the cavity. Through the deformation adjustment mechanism, the tuning cover plate can be deformed to achieve the purpose of changing the tuning frequency. During the tuning process, no debris will enter the cavity, and no intermodulation will occur during the debugging process, improving the intermodulation qualification rate and stability. Description of the Drawings
[0019] Figure 1 is a schematic structural diagram of the filter cover plate tuning structure in Embodiment 1 of the present utility model;
[0020] Figure 2 is the front view of the tuning screw in Embodiment 1 of the present utility model;
[0021] Figure 3 is the bottom view of the tuning screw in Embodiment 1 of the present utility model;
[0022] Figure 4 is a schematic structural diagram of the filter cover plate tuning structure in Embodiment 2 of the present utility model;
[0023] Figure 5 is the front view of the tuning screw in Embodiment 3 of the present utility model;
[0024] Figure 6 It is the bottom view of the tuning screw in Embodiment 3 of the present utility model;
[0025] Figure 7 It is the front view of the tuning screw in Embodiment 4 of the present utility model;
[0026] Figure 8 It is the bottom view of the tuning screw in Embodiment 4 of the present utility model.
[0027] In the attached drawings, each reference numeral represents:
[0028] 1, tuning cover plate; 2, fixing column; 3, tooling cover plate; 4, tuning screw; 5, hanging screw; 6, resonant rod; 7, cavity; 8, fixing screw; 9, outer shell; 11, thin wall; 41, hanging protrusion; 42, pressing protrusion. Detailed implementation manners
[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the attached drawings, in which the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the attached drawings are exemplary and are intended to explain the present utility model, but should not be construed as a limitation to the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.
[0032] Embodiment 1:
[0033] See Figure 1, in this embodiment, the filter cover tuning structure includes: a cavity 7 and a tuning cover 1. The tuning cover 1 is fixed on the opening side of the cavity 7. A resonant rod 6 is provided in the cavity 7. A deformation adjustment mechanism is provided on the outer side of the tuning cover 1. The deformation adjustment mechanism and the resonant rod 6 are arranged on both sides of the tuning cover 1 relatively. The deformation adjustment mechanism adjusts the distance between the tuning cover 1 and the resonant rod 6.
[0034] The thickness of the middle part of the tuning cover 1 is less than that of the surrounding part, forming a thin wall 11 in the middle part of the tuning cover 1. The deformation adjustment mechanism is arranged in the middle part of the tuning cover 1. The deformation adjustment mechanism adjusts the deformation of the thin wall 11, making it easier to generate deformation and facilitating adjustment.
[0035] Specifically, the deformation adjustment mechanism includes a tooling cover 3 and a tuning screw 4. The tooling cover 3 is fixed on the side of the tuning cover 1 away from the cavity 7. The tuning screw 4 is threadedly connected to the tooling cover 3. One end of the tuning screw 4 is in contact with the tuning cover 1.
[0036] One end of the tuning screw 4 is thicker, forming a hanging projection 41 extending radially outward. A hanging structure is provided on the tuning cover 1. The hanging projection 41 is arranged inside the hanging structure. When the tuning screw 4 is screwed downwards, the thin wall 11 deforms downwards, and the frequency decreases. When the tuning screw 4 is screwed upwards, the thin wall 11 is lifted upwards through the hanging projection 41 and the hanging structure, making the thin wall 11 deform upwards, and the frequency increases, so as to achieve the purpose of debugging.
[0037] The hanging structure includes a fixing column 2 and hanging screws 5. A plurality of hanging screws 5 are uniformly arranged around the tuning screw 4. The fixing column 2 is fixedly arranged on the outer side of the tuning cover 1. The hanging screws 5 are threadedly connected to the fixing column 2, and the head diameter of the hanging screw 5 is larger than the diameter of the fixing column 2. The hanging projection 41 is arranged between the tuning cover 1 and the head of the hanging screw 5. When the tuning screw 4 is screwed upwards, the hanging projection 41 lifts the thin wall 11 upwards through the head of the hanging screw 5.
[0038] The tooling cover 3 in this embodiment is detachably arranged on the opening side of the cavity 7 through fixing screws 8. The tooling cover 3 is detachable from the cavity 7. After debugging is completed, the tooling cover 3, the tuning screw 4 and the hanging screws 5 can all be taken off from the cavity 7 and the tuning cover 1.
[0039] See Figures 2-3 , in this embodiment, the end face of one end of the tuning screw 4 is smoothly arranged, and the whole end face is in contact with the thin wall 11. When the tuning screw 4 is screwed downwards, the thin wall 11 is driven to deform downwards through the whole end face of the tuning screw 4.
[0040] The tuning cover plate 1 seals the cavity 7. By rotating the tuning screw 4 downward, the thin wall 11 of the tuning cover plate 1 can be deformed downward, reducing the frequency. By rotating the tuning screw 4 upward, the thin wall 11 of the tuning cover plate 1 can be lifted upward through the hanging protrusion 41 and the hanging screw 5, increasing the frequency, so as to achieve the purpose of debugging. During the tuning process, since the cavity 7 is closed, no debris will enter the cavity 7, so cross-talk will not occur during the debugging process, improving the intermodulation qualification rate and stability. Moreover, the debugging structure is simple. After the debugging is completed, the tooling cover plate 3, the hanging screw 5 and the tuning screw 4 can be removed from the cavity 7 and the tuning cover plate 1.
[0041] It should be noted that the figure shows only a single cavity description, and the actual filter includes multiple single cavities.
[0042] Embodiment 2
[0043] See Figure 4 , the tooling cover plate 3, the hanging screw 5 and the tuning screw 4 do not belong to the components of the filter and can be removed from the cavity 7 and the tuning cover plate 1 after the debugging is completed. There can be various specific connection methods for the tooling cover plate 3. In this embodiment, an outer shell 9 is provided outside the cavity 7, and the tooling cover plate 3 is fixed on the outer shell 9. After the debugging is completed, the filter can be taken out from the outer shell 9.
[0044] Embodiment 3
[0045] See Figures 5-6 , one end of the tuning screw 4 has a pressing protrusion 42 pressing on the tuning cover plate 1. By using the pressing protrusion 42, the contact area with the thin wall 11 can be reduced, making it easier for the thin wall 11 to deform. Specifically, the pressing protrusion 42 in this embodiment is annular.
[0046] Embodiment 4
[0047] See Figures 7-8 , in this embodiment, multiple pressing protrusions 42 are arranged annularly, further reducing the contact area with the thin wall 11.
[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A filter cover tuning structure, comprising a cavity and a tuning cover plate, the tuning cover plate being fixed on the opening side of the cavity, and a resonant rod being provided in the cavity, characterized in that, A deformation adjustment mechanism is provided on the outer side of the tuning cover plate. The deformation adjustment mechanism and the resonance rod are oppositely arranged on both sides of the tuning cover plate, and the deformation adjustment mechanism adjusts the distance between the tuning cover plate and the resonance rod.
2. The filter cover tuning structure according to claim 1, characterized in that The thickness of the middle part of the tuning cover plate is smaller than that of the surrounding part, and the deformation adjustment mechanism is arranged in the middle part of the tuning cover plate.
3. The filter cover tuning structure according to claim 1 or 2, characterized in that, The deformation adjustment mechanism includes a tooling cover plate and a tuning screw. The tooling cover plate is fixed on the side of the tuning cover plate away from the cavity, the tuning screw is threadedly connected to the tooling cover plate, and one end of the tuning screw is in contact with the tuning cover plate.
4. The filter cover tuning structure according to claim 3, characterized in that, One end of the tuning screw has a hanging protrusion extending radially outward, and a hanging structure is provided on the tuning cover plate, and the hanging protrusion is arranged inside the hanging structure.
5. The filter cover tuning structure according to claim 4, wherein, The hanging structure includes a fixing post and a hanging screw. The fixing post is fixedly arranged on the outer side of the tuning cover plate, the hanging screw is threadedly connected to the fixing post, and the diameter of the head of the hanging screw is larger than the diameter of the fixing post, and the hanging protrusion is arranged between the tuning cover plate and the head of the hanging screw.
6. The filter cover tuning structure according to claim 5, characterized in that, At least two of the hanging screws are evenly arranged around the tuning screw.
7. The filter cover tuning structure according to claim 3, wherein The tooling cover plate is detachably arranged on the opening side of the cavity.
8. The filter cover tuning structure according to claim 3, characterized in that An outer shell is provided on the outer side of the cavity, and the tooling cover plate is fixed on the outer shell.
9. The filter cover tuning structure according to claim 3, characterized in that, The end face of one end of the tuning screw is smoothly arranged; or one end of the tuning screw has a pressing protrusion pressing on the tuning cover plate.
10. The filter cover tuning structure according to claim 9, characterized in that, The pressing protrusion is annular, or a plurality of the pressing protrusions are arranged in an annular pattern.