Filtering tuning device
By employing a combination of a grooved thin-walled region and a support structure in the filter tuning device, chip-free tuning is achieved, solving the chip problem and improving production efficiency and reliability.
Patent Information
- Application Number
- CN202511356042.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-01-13
AI Technical Summary
Existing radio frequency device filtering and tuning devices generate debris during the tuning process, which is difficult to remove, resulting in poor performance and affecting production efficiency and reliability.
A chipless tuning filter is designed by forming a groove-shaped thin-walled area on the cover plate and using a combination of a support and a tuning screw and stud. The tuning screw rotates to adjust the distance between the thin-walled area and the resonant stud, thus achieving chipless tuning.
It achieves chipless tuning, reduces rework and chip removal processes, and improves production efficiency and the reliability of the filter tuning device.
Smart Images
Figure CN121332134A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of communication radio frequency filtering, in particular to a filter tuning device. BACKGROUND
[0002] At present, the filter tuning device of the radio frequency device generally adopts the mode of screw rod penetrating through the cover plate and extending into the cavity for tuning. For example, the traditional filter tuning device adopts the combined structure of cover plate screw hole, screw rod and nut. The installation mode includes: realizing screw rod locking by relying on the reverse torque of double nuts. A large amount of debris will be generated in the screw rod and cover plate thread rotation friction process, which will directly fall in the filter tuning device, and it is difficult to completely clean; the index is prone to be poor when doing power test.
[0003] Therefore, it is urgent to design a chipless adjustable filter tuning device which can realize reliability, solve the pain points and bottlenecks that have plagued the industry, reduce the repair and debris removal process, greatly improve the production efficiency, and greatly improve the reliability of the filter tuning device. SUMMARY
[0004] The purpose of the present application is to overcome the above technical problems, and provide a filter tuning device capable of realizing chipless tuning.
[0005] The filter tuning device provided by the present application comprises a tuning screw, a support, an open-ended cavity, a cover plate installed at the open end of the cavity, and a resonant column installed in the cavity. The support is arranged above the thin-walled area and is supported by the cover plate. The cover plate forms a groove-shaped thin-walled area above the resonant column. There is a space between the support and the thin-walled area. The support is provided with a through hole, one end of the tuning screw penetrates through the through hole, and the other end abuts against the surface of the support and is supported by the support. The upper surface of the thin-walled area is fixedly provided with a threaded column which is threadedly connected with the tuning screw. The rotation of the tuning screw increases the depth of the threaded column penetrating into the threaded column, so that the thin-walled area is deformed upward to adjust the distance between the bottom surface of the thin-walled area and the top surface of the resonant column.
[0006] In a preferred embodiment, the other end of the tuning screw is a nut, the diameter of the nut is greater than the diameter of the through hole, the outer diameter of the threaded column is less than the diameter of the through hole, the threaded column is coaxially arranged with the through hole, and the height of the threaded column is less than the sum of the height of the space and the height of the through hole.
[0007] In a preferred embodiment, the threaded column is coaxially arranged with the through hole, and the height of the threaded column is less than the height of the space.
[0008] In a preferred embodiment, the thin-walled area is provided with a stepped structure which is recessed downward to the resonant column.
[0009] In a preferred embodiment, the diameter of the opening of the resonant column near the thin-wall region is substantially equal to the diameter of the lower concave step structure of the thin-wall region.
[0010] In a preferred embodiment, the thin-wall region is arranged in the middle region of the cover plate, the screw column is arranged in the center of the thin-wall region; the screw column corresponds to the resonant column directly above, and the center of the screw column is collinear with the center of the resonant column.
[0011] In a preferred embodiment, the screw column is integrally connected with the thin-wall region.
[0012] In a preferred embodiment, the upper surface of the cover plate is formed with a step at the edge of the space, and the support is clamped to the step to be inlaid on the upper surface of the cover plate.
[0013] In a preferred embodiment, the support is fixedly welded with the cover plate; the upper surface of the support is substantially flush with the upper surface of the cover plate.
[0014] In a preferred embodiment, the support is in any one of a cylindrical shape, a waist-shaped body, a cuboid or a triangular body.
[0015] Compared with the prior art, the cover plate of the present application corresponds to the resonant column directly above to form a groove-shaped thin-wall region, the upper surface of the thin-wall region is fixedly arranged with a screw column threadedly connected with the tuning screw; the cover plate is supported by a support, the support is provided with a through hole, one end of the tuning screw passes through the through hole, the other end of the tuning screw abuts against the surface of the support and is supported by the support; and the support and the thin-wall region have a space therebetween; the tuning screw extends into the threaded hole of the screw column, the rotation of the tuning screw increases the depth of the extension into the screw column, so that the thin-wall region is deformed upward to adjust the distance between the bottom surface of the thin-wall region and the top surface of the resonant column, so as to tune the frequency. The tuning screw of the present application does not extend into the cavity through the cover plate; thus, the chipless tuning can be reliably achieved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a perspective view of the filter tuning device provided by an embodiment of the present application; Figure 2 is a longitudinal section view of the filter tuning device provided by an embodiment of the present application; Figure 1 is a longitudinal section view of the filter tuning device provided by an embodiment of the present application; Figure 3 is a longitudinal section view of the filter tuning device provided by an embodiment of the present application; Figure 2 is a schematic view of the connection structure between the cover plate, the support, the tuning screw and the screw column of the filter tuning device shown in FIG. 4; Figure 4is a stereogram of a cover plate and a stud of a filter tuning device provided by an embodiment of the present application; Figure 5 is a stereogram of a support of a filter tuning device provided by an embodiment of the present application; Figure 6 is a stereogram of a support of a filter tuning device provided by a second embodiment of the present application; Figure 7 is a stereogram of a filter tuning device provided by a second embodiment of the present application. DETAILED DESCRIPTION
[0017] The present application is further described below in conjunction with the accompanying drawings and embodiments.
[0018] Referring to Figure 1 and Figure 2 , the present application provides a filter tuning device 100 comprising a cavity 10 with an open end, a cover plate 20, a resonant stud 30 and a tuning screw 50 installed in the cavity 10. The cover plate 20 is installed at the open end of the cavity 10; the resonant stud 30 is installed in the cavity 10.
[0019] Referring to Figure 2 , Figure 3 and Figure 4 , the cover plate 20 forms a thin-walled region 25 in the form of a groove above the resonant stud 30. The present embodiment tunes the frequency by changing the distance between the bottom surface of the thin-walled region 25 and the top surface of the resonant stud 30.
[0020] The upper surface of the thin-walled region 25 is fixedly provided with a stud 70 that is threadedly connected with the tuning screw 50. The filter tuning device 100 further comprises a support 60. The support 60 is arranged above the thin-walled region and is supported by the cover plate 20. The support 60 has a space with the thin-walled region 25. The support 60 is provided with a through hole 61; one end of the tuning screw 50 extends into the stud 70 through the through hole 61; the other end of the tuning screw 50 is clamped to the upper surface of the support 60. Specifically, the other end of the tuning screw 50 is clamped to the edge of the through hole 61 of the support 60. The stud 70 corresponds to the through hole 61. By adjusting the depth of the tuning screw 50 extending into the stud 70, the thin-walled region 25 is deformed upward to adjust the distance between the bottom surface of the thin-walled region 25 and the top surface of the resonant stud 30. In the present embodiment, the stud 70 is integrally connected with the thin-walled region 25. In this way, the thin-walled region 25 can be synchronously driven by the stud 70. In this way, the tuning screw 50 does not need to pass through the cover plate 20; the tuning debris can be completely prevented from entering the cavity 10; thus, chipless tuning is achieved.
[0021] Preferably, the through hole 61 of the support 60 is coaxially arranged with the threaded hole of the stud 70. One end of the tuning screw 50 is a nut, the diameter of which is larger than that of the through hole 61; the nut is pressed against the edge of the through hole 61, so that the tuning screw 50 is supported by the support 60.
[0022] In a preferred embodiment, the outer diameter of the stud 70 is smaller than the diameter of the through hole 61. The height of the stud 70 is smaller than the sum of the height of the space between the support 60 and the thin-walled region 25 and the height of the through hole. In this way, when the tuning screw 50 rotates relative to the stud 70, the depth of the tuning screw 50 extending into the stud 70 increases, the stud 70 is increasingly close to the tuning screw 50, thereby pulling the thin-walled region 25 to deform upward, i.e. the thin-walled region 25 is increasingly close to the tuning screw 50 along with the stud 70. At this time, the maximum amplitude of the upward deformation of the thin-walled region 25 depends on the distance between the top end of the stud 70 and the bottom surface of the tuning screw 50.
[0023] In another specific embodiment, the height of the stud 70 can also be smaller than the height of the space between the support 60 and the thin-walled region 25. The diameter of the through hole 61 only needs to be larger than the outer diameter of the end of the tuning screw 50 extending into the through hole 61, so that the end of the tuning screw 50 can pass through the through hole 61 and extend into the threaded hole of the stud 70. At this time, the maximum amplitude of the upward deformation of the thin-walled region 25 depends on the distance between the top end of the stud 70 and the bottom surface of the support 60.
[0024] Further, the thin-walled region 25 is provided with a stepped structure 251 recessed downward from the resonant column 30. In this way, the distance between the thin-walled region 25 and the bottom end of the support 60 or the bottom end of the tuning screw 50 is increased, thereby increasing the maximum amplitude of the upward deformation of the thin-walled region 25 to tune the frequency of the filter.
[0025] In a preferred embodiment, the opening diameter of the resonant column 30 close to one end of the thin-walled region 25 is substantially equal to the diameter of the recessed stepped structure 251 of the thin-walled region 25, so that the frequency tuning is performed by adjusting the distance between the top surface of the resonant column 30 and the bottom surface of the recessed stepped structure 251 of the thin-walled region 25.
[0026] Preferably, the thin-walled region 25 is arranged in the middle region of the cover plate 20, and the stud 70 is arranged at the center of the thin-walled region 25; the stud 70 corresponds to directly above the resonant column 30, and the center of the stud 70 is collinear with the center of the resonant column 30. In this way, the distance between the bottom surface of the region of the upward deformation of the thin-walled region 25 and the top surface of the resonant column 30 can be further increased to tune the frequency.
[0027] In this embodiment, a step 26 is formed on the upper surface of the cover plate 20 at the edge of the space. The support member 60 is engaged with the step 26 to fit into the upper surface of the cover plate 20. This space is the space between the support member 60 and the thin-walled region 25. Preferably, the upper surface of the support member 60 is substantially flush with the upper surface of the cover plate 20.
[0028] The support member 60 and the cover plate 20 can be either detachably or fixedly connected. The support member 60 being snapped onto the step 26 is one type of detachable connection. Alternatively, the support member 60 and the cover plate 20 can be welded together for a fixed connection.
[0029] The present invention does not limit the shape of the support member, as long as the support member 60 can be supported by the cover plate 20 and can also support the tuning screw 50. The shape of the support member 60 can be any one of the following: cylinder, oblong, cuboid, or triangular. Figure 1 and Figure 5 The support member 60 is shown to be cylindrical, and at this time, the cylindrical support block 60 completely covers the space between the support member 60 and the thin-walled region 25. Figure 6 and Figure 7 The support member 60 is shown to be a cuboid. At this time, the support member 60 is placed above the space between the support member 60 and the thin-walled region 25. The thin-walled region 25 is also shown. During the tuning process, the upward deformation of the thin-walled region 25 can be visually observed to predict the tuning effect of the frequency.
[0030] 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 filtering and tuning device, comprising a tuning screw (50), a cavity (10) open at one end, a cover plate (20) mounted on the open end of the cavity (10), and a resonant post (30) mounted inside the cavity (10), characterized in that, It also includes a support member (60), which is disposed above the thin-walled region and supported by a cover plate (20); the cover plate (20) forms a groove-shaped thin-walled region (25) corresponding to the top of the resonant column (30); there is a space between the support member (60) and the thin-walled region (25); the support member (60) is provided with a through hole (61), one end of the tuning screw (50) passes through the through hole (61), and the other end abuts against the surface of the support member (60) and is supported by the support member (60); a stud (70) is fixedly disposed on the upper surface of the thin-walled region (25) and threadedly connected to the tuning screw (50); the tuning screw (50) rotates to increase the depth of insertion into the stud (70), so that the thin-walled region (25) deforms upward to adjust the distance between the bottom surface of the thin-walled region (25) and the top surface of the resonant column (30).
2. The filtering and tuning device according to claim 1, characterized in that, The other end of the tuning screw (50) is a nut, the diameter of which is larger than the diameter of the through hole (61); the outer diameter of the stud (70) is smaller than the diameter of the through hole (61); the stud (70) and the through hole (61) are coaxially arranged; the height of the stud (70) is less than the sum of the height of the space and the height of the through hole.
3. The filtering and tuning device according to claim 1, characterized in that, The stud (70) is coaxially arranged with the through hole (61); the height of the stud (70) is less than the height of the space.
4. The filtering and tuning device according to claim 1, characterized in that, The thin-walled region (25) is provided with a stepped structure (251) that is recessed towards the resonant column (30).
5. The filtering and tuning device according to claim 4, characterized in that, The diameter of the opening of the resonant pillar (30) near the thin-walled region (25) is approximately equal to the diameter of the concave stepped structure (251) of the thin-walled region (25).
6. The filtering and tuning device according to any one of claims 1 or 4, characterized in that, The thin-walled region (25) is located in the middle region of the cover plate (20), and the stud (70) is located at the center of the thin-walled region (25); the stud (70) is located directly above the resonant column (30), and the center of the stud (70) is collinear with the center of the resonant column (30).
7. The filtering and tuning device according to claim 1, characterized in that, The stud (70) is integrally connected to the thin-walled region (25).
8. The filtering and tuning device according to claim 1, characterized in that, The upper surface of the cover plate (20) forms a step (26) at the edge of the space, and the support (60) is engaged with the step (26) to be inserted into the upper surface of the cover plate (20).
9. The filtering and tuning device according to claim 1, characterized in that, The support member (60) is welded and fixed to the cover plate (20); the upper surface of the support member (60) is basically flush with the upper surface of the cover plate (20).
10. The filtering and tuning device according to claim 1, characterized in that, The support member (60) is any one of the following shapes: cylinder, waist-shaped, cuboid, or triangular.