Fixing assembly for dielectric filter debugging tool
By designing a debugging tool for dielectric filters, the combination of positioning plate, horizontal fixtures and vertical fixtures is used to solve the problem of signal leakage and difficulty in dielectric filter debugging, and efficient and accurate debugging effect is achieved.
Patent Information
- Application Number
- CN202510309589.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2021-03-31
- Publication Date
- 2025-05-02
AI Technical Summary
The existing dielectric filters have signal leakage problems during debugging, and traditional debugging methods are difficult and have low yields. Repeated debugging will lead to poor performance of the dielectric filter.
A dielectric filter debugging tool is designed, including a positioning plate, a horizontally movable horizontal fixture and a vertical fixture that can be moved up and down. Through the cooperation of these components, the dielectric block can be fixed on the bottom plate and simulate the effect of the shielding shell, which is convenient for debugging.
Through this debugging tooling, debugging difficulty is reduced, yield rate is improved, operation is simple, results are accurate, and problems such as damage to shield shells and abnormal performance in traditional methods are avoided.
Smart Images
Figure CN119921076A_ABST
Abstract
Description
[0001] Divisional Application Statement
[0002] This application is a divisional application of the Chinese invention patent application with the invention name “A dielectric filter debugging tool” and application number 202110351150.7 filed on March 31, 2021. Technical Field
[0003] The present application relates to the field of dielectric filter processing and manufacturing, and in particular to a fixing assembly for a dielectric filter debugging tool. Background Art
[0004] Most existing dielectric filters include a dielectric block and a metal conductive layer, wherein the dielectric block is mostly made of ceramic material and is provided with a plurality of resonant through holes, and the metal conductive layer is coated on the surface of the dielectric block.
[0005] Due to structural limitations, the circuit surface at the front end of the conventional surface-mount filter dielectric block usually adopts an open design. This design has a large signal leakage problem, which will affect the indicators and use effect of the dielectric filter. In order to solve this problem, a shielding shell must be welded for shielding during the actual production of the filter to obtain better out-of-band suppression effect.
[0006] When debugging the performance of this dielectric filter, it is mainly completed by grinding off the metal conductive layer on the front circuit surface of the dielectric block. The traditional debugging method is to weld the shielding shell first and then debug. The debugging can only be performed through the debugging window opened on the shielding shell. The debuggable area is small and the debugging difficulty is high. The shielding shell is easily damaged during grinding, affecting the appearance. In addition, the burrs and debris of the metal conductive layer generated after debugging and grinding are not easy to clean, which can easily cause performance abnormalities. There is a certain reliability risk and the debugging yield rate is not high. If the shielding shell is welded directly after debugging, due to the large difference in the performance of the dielectric filter before and after welding, repeated debugging is required. In addition, there is a certain limit to the amount of grinding of the dielectric. Repeated debugging will cause poor performance of the dielectric filter and reduce the debugging yield rate. Summary of the invention
[0007] The purpose of the present invention is to overcome one or more disadvantages in the prior art and to provide a fixing assembly for a dielectric filter debugging tool.
[0008] To achieve the above object, the technical solution adopted by the present invention is that a fixing assembly for a dielectric filter debugging tool is used to fix a dielectric block of a dielectric filter on a bottom plate, and the fixing assembly for a dielectric filter debugging tool comprises:
[0009] A positioning plate disposed on the bottom plate, wherein a side wall of the positioning plate is provided with a positioning groove matching the dielectric block;
[0010] a horizontal fixing member that can be moved horizontally, the horizontal fixing member being able to move toward or away from the notch of the positioning slot, and when the dielectric block is placed on the bottom plate and located in the positioning slot, the dielectric block can be pressed against the slot wall of the positioning slot by the movement of the horizontal fixing member;
[0011] A vertical fixing member that can move up and down is located above the positioning groove. When the vertical fixing member moves downward to press against the dielectric block in the positioning groove, the vertical fixing member forms a shielding shell of the dielectric filter.
[0012] Preferably, the vertical fixing member includes a fixing block and an extension plate extending vertically downward from the end of the fixing block away from the horizontal fixing member. When the vertical fixing member is pressed against the dielectric block, the bottom wall of the fixing block fits with the upper surface of the dielectric block, and there is a gap between the extension plate and the surface of the dielectric block away from the horizontal fixing member, and the gap affects the frequency of the dielectric filter.
[0013] Further preferably, the middle portion of the lower bottom surface of the extension plate protrudes downward to form a protrusion matching the blind groove on the bottom plate, and when the vertical fixing member moves downward to press against the dielectric block in the positioning groove, the protrusion is inserted into the blind groove and presses against the conductive rubber strip filled in the blind groove.
[0014] Further preferably, the positioning plate is provided with an avoidance groove for the protrusion to pass through.
[0015] Further preferably, the avoidance groove is connected to the positioning groove.
[0016] Further preferably, the extension plate is movable in a horizontal direction to adjust the size of the gap.
[0017] Further preferably, a window for detection and debugging is provided on the extension plate, and a grinding tool can grind off the metal conductive layer on the front surface of the dielectric block through the window to complete the debugging.
[0018] Preferably, the projection of the horizontal fixing member in the up-down direction is in a concave shape, and when the horizontal fixing member is pressed against the dielectric block, the horizontal fixing member and the positioning groove wrap around the dielectric block.
[0019] Preferably, the base plate is made of brass material.
[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:
[0021] The fixing assembly for the dielectric filter debugging tool provided by the present invention is used for fixing the dielectric block of the dielectric filter on a bottom plate, and comprises a positioning plate arranged on the bottom plate, a horizontal fixing piece which can be moved horizontally, and a vertical fixing piece which can be moved up and down. A positioning groove which matches the dielectric block is provided on one side wall of the positioning plate, and the horizontal fixing piece can be moved in a direction close to or away from the notch of the positioning groove. When the dielectric block is placed on the bottom plate and located in the positioning groove, the horizontal fixing piece can be moved to press against the groove wall of the positioning groove, so that the dielectric block can be conveniently fixed for debugging. The vertical fixing piece is located above the positioning groove. When the vertical fixing piece moves downward to press against the dielectric block in the positioning groove, the vertical fixing piece forms a shielding shell of the dielectric filter, and the shielding shell can be simulated to detect the performance of the dielectric filter. By moving the vertical fixing piece up and down, a larger surface area of the dielectric block can be exposed for debugging, and the debugging is easy, the yield is high, the operation is simple, and the result is accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the present invention.
[0024] Figure 2 yes Figure 1 A three-dimensional enlarged schematic diagram of the vertical fixing member in the middle.
[0025] Figure 3 yes Figure 1 A magnified perspective view of the midsole plate.
[0026] Figure 4 yes Figure 1 A three-dimensional enlarged schematic diagram of the middle positioning plate.
[0027] Figure 5 yes Figure 1 A three-dimensional enlarged schematic diagram of the middle horizontal fixing.
[0028] Figure 6 yes Figure 1 A magnified perspective diagram of the middle horizontal extension beam.
[0029] Among them: 10. Support frame; 11. Support column; 12. Horizontal support plate; 13. Vertical support plate; 14. Horizontal extension beam; 141. Waist-shaped hole; 20. Bottom plate; 21. Blind groove; 22. Mounting hole; 23. Elastic pin; 31. Positioning plate; 311. Positioning groove; 312. Avoidance groove; 32. Horizontal fixing piece; 33. Vertical fixing piece; 331. Fixing block; 332. Extension plate; 333. Protrusion; 334. Window; 41. First cylinder; 42. Second cylinder; 43. First pneumatic valve; 50. Test cable. DETAILED DESCRIPTION
[0030] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0033] like Figure 1-6 As shown, the dielectric filter debugging tool provided by the present invention includes: a support frame 10, a base plate 20, a fixing assembly, a driving assembly and a test cable 50, wherein the support frame 10 includes a support column 11, a horizontal support plate 12, a vertical support plate 13 and a horizontal extension beam 14, there are four support columns 11, which are respectively located at the four corners of the bottom of the base plate 20, and the support columns 11 are used to support the base plate 20 on the horizontal support plate 12, the vertical support plate 13 is located at the rear side of the base plate 20 and is vertically connected to the horizontal support plate 12, and the horizontal extension beam 14 is fixedly connected to the top of the vertical support plate 13 by connecting bolts and extends forward.
[0034] The plane where the bottom plate 20 is located is parallel to the horizontal plane. The upper surface of the bottom plate 20 is used to place the dielectric block of the dielectric filter. The bottom plate 20 is made of a metal material with excellent conductive properties. In this embodiment, the bottom plate 20 is made of brass.
[0035] The fixing assembly is used to fix the dielectric block on the bottom plate 20. Specifically, the fixing assembly includes a positioning plate 31 arranged on the bottom plate 20, a horizontal fixing member 32 that can be moved horizontally, and a vertical fixing member 33 that can be moved up and down. The rear side wall of the positioning plate 31 is provided with a positioning groove 311 that matches the dielectric block. The horizontal fixing member 32 can move forward and backward in a direction close to or away from the notch of the positioning groove 311. When the dielectric block is placed on the bottom plate 20 and located in the positioning groove 311, the dielectric block can be pressed against the groove wall of the positioning groove 311 by moving the horizontal fixing member 32 forward and backward, so as to facilitate the debugging of the dielectric block. In this embodiment, the projection of the horizontal fixing member 32 in the up and down direction is concave. Type, when the horizontal fixing member 32 is pressed against the dielectric block, the horizontal fixing member 32 and the positioning groove 311 wrap around the dielectric block, and the vertical fixing member 33 is located directly above the positioning groove 311. When the vertical fixing member 33 moves downward and presses against the dielectric block in the positioning groove 311, the vertical fixing member 33 constitutes a shielding shell of the dielectric filter. The constituting of the shielding shell means that the outer structure of the vertical fixing member 33 is designed according to the actual size of the shielding shell of the filter, and the vertical fixing member 33 is made of the same type of material as the shielding shell. When the vertical fixing member 33 is pressed against the dielectric block, it is equivalent to the shielding shell being welded to the dielectric block. In this case, the effect of debugging is infinitely close to the effect of debugging after welding the shielding shell.
[0036] The driving assembly includes a first cylinder 41 for driving the horizontal fixing member 32 to move, a second cylinder 42 for driving the vertical fixing member 33 to move, and a pneumatic valve for controlling the movement of the first cylinder 41 and the second cylinder 42. In this embodiment, the first cylinder 41 is arranged on the rear side wall of the base plate 20, and the first cylinder 41 extends in the front and rear directions. The end of the cylinder rod of the first cylinder 41 is connected to the horizontal fixing member 32, and the second cylinder 42 is arranged at the front end of the horizontal extension beam 14. The second cylinder 42 moves along the upper and lower sides. The second air cylinder 42 extends upward, and the end of the cylinder rod of the second air cylinder 42 is connected to the vertical fixing piece 33. The pneumatic valve includes a first pneumatic valve 43 for controlling the action of the first air cylinder 41 and a second pneumatic valve (not shown in the figure) for controlling the action of the second air cylinder 42. The first pneumatic valve 43 is a button valve. The first pneumatic valve 43 is arranged on the side wall of the vertical support plate 13. The second air cylinder 42 is connected to the second pneumatic valve through two air pipes and controls the action of the second pneumatic valve through a foot switch, thereby controlling the vertical fixing piece 33 to move up and down.
[0037] In this embodiment, the vertical fixing member 33 includes a fixing block 331 and an extension plate 332 extending vertically downward from the front end of the fixing block 331. When the vertical fixing member 33 is pressed against the dielectric block, the bottom wall of the fixing block 331 fits against the upper surface of the dielectric block, and there is a gap between the extension plate 332 and the front surface of the dielectric block. The gap affects the frequency of the dielectric filter, and the size of the gap is the same as the gap size corresponding to the dielectric block after the shielding shell is actually welded.
[0038] In this embodiment, the extension plate 332 can move in the front-to-back direction. Specifically, a waist-shaped hole 141 for the connecting bolt to pass through is provided on the horizontal extension beam 14. The extension direction of the waist-shaped hole 141 is parallel to the moving direction of the horizontal fixing member 32, that is, the waist-shaped hole 141 extends in the front-to-back direction. When the connecting bolt is loosened, the horizontal extension beam 14 can move forward and backward relative to the vertical support plate 13 through the waist-shaped hole 141, thereby driving the vertical positioning member 33 to move through the second cylinder 42, thereby adjusting the size of the gap between the extension plate 332 and the front surface of the dielectric block. Under normal circumstances, since the size of the dielectric filter shielding shell is fixed, the gap only needs to be adjusted to the corresponding size and no longer adjusted.
[0039] In order to avoid excessive adjustment of the above-mentioned gap, in the present embodiment, the middle portion of the lower bottom surface of the extension plate 332 protrudes downward to form a protrusion 333 matching the blind groove 21 on the bottom plate 20. When the vertical fixing member 33 moves downward to press against the dielectric block in the positioning groove 311, the protrusion 333 is inserted into the blind groove 21 and presses against the conductive rubber strip filled in the blind groove 21 to ensure that the dielectric filter has a good grounding effect.
[0040] In order to facilitate the insertion of the protrusion 333 into the blind groove 21 , an avoidance groove 312 for the protrusion 333 to pass through is opened on the positioning plate 31 . In this embodiment, in order to facilitate processing, the avoidance groove 312 is connected to the positioning groove 311 .
[0041] In this embodiment, three windows 334 for detection and debugging are also provided on the extension plate 332. The grinding tool can directly grind off the metal conductive layer on the front surface of the dielectric block through the window 334 to complete the debugging. If there is a blind spot for debugging, the vertical fixing member 33 can be lifted by the second cylinder 42 through the prediction of the graphics during the debugging process. In this way, there is a larger space for grinding and debugging. After the debugging is completed, the vertical fixing member 33 is moved downward to press against the dielectric block for the next step of debugging, which is convenient to operate.
[0042] The test cable 50 is used to connect the dielectric block and the tester. The tester is a network divider. In this embodiment, a mounting hole 22 for mounting an SMA connector is provided on the base plate 20. The mounting hole 22 is a through hole. The size of the mounting hole 22 matches the SMA connector. The SMA connector is inserted into the mounting hole 22. The elastic pin needle 23 on the top of the SMA connector protrudes upward from the upper surface of the base plate 20. The test cable 50 is located below the base plate 20. One end of the test cable 50 is connected to the threaded interface at the bottom of the SMA connector, and the other end of the test cable 50 is connected to the tester. When the dielectric block is located in the positioning groove 311, the elastic pin needle 23 of the SMA connector contacts the input and output electrodes of the dielectric block, so that the performance of the dielectric filter can be tested by the tester.
[0043] The dielectric filter debugging tool provided by the present invention can conveniently fix the dielectric block for debugging by enabling the horizontal fixing part to move toward or away from the notch of the positioning groove, and by enabling the vertical fixing part to be located above the positioning groove, when the vertical fixing part moves downward to press against the dielectric block in the positioning groove, the vertical fixing part forms a shielding shell of the dielectric filter, and can simulate the performance effect after the shielding shell and the dielectric block are welded together. By moving the vertical fixing part up and down, the dielectric block can expose a larger surface area for debugging, and the debugging is easy, the yield rate is high, the operation is simple, and the result is accurate. After the dielectric block is debugged by this method, the debugging area of the dielectric block is cleaned, and then the shielding shell and the dielectric block are welded together by a special high-precision tool. The gap between the shielding shell and the front end of the dielectric block after welding is consistent with that of the debugging tool, and the error is as small as possible, thereby achieving better debugging performance and product quality.
[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0045] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A fixing assembly for a dielectric filter debugging tool, used to fix a dielectric block of a dielectric filter on a bottom plate, characterized in that: The fixing assembly for the dielectric filter debugging tool comprises: A positioning plate disposed on the bottom plate, wherein a side wall of the positioning plate is provided with a positioning groove matching the dielectric block; a horizontal fixing member that can be moved horizontally, the horizontal fixing member being able to move toward or away from the notch of the positioning slot, and when the dielectric block is placed on the bottom plate and located in the positioning slot, the dielectric block can be pressed against the slot wall of the positioning slot by the movement of the horizontal fixing member; A vertical fixing member that can move up and down is located above the positioning groove. When the vertical fixing member moves downward to press against the dielectric block in the positioning groove, the vertical fixing member forms a shielding shell of the dielectric filter.
2. The fixing assembly for dielectric filter debugging tooling according to claim 1, characterized in that: The vertical fixing member includes a fixing block and an extension plate extending vertically downward from the end of the fixing block away from the horizontal fixing member. When the vertical fixing member is pressed against the dielectric block, the bottom wall of the fixing block fits with the upper surface of the dielectric block, and there is a gap between the extension plate and the surface of the dielectric block away from the horizontal fixing member, and the gap will affect the frequency of the dielectric filter.
3. The fixing assembly for dielectric filter debugging tooling according to claim 2, characterized in that: The middle part of the lower bottom surface of the extension plate protrudes downward to form a protrusion matching the blind groove on the bottom plate. When the vertical fixing member moves downward to press against the dielectric block in the positioning groove, the protrusion is inserted into the blind groove and presses against the conductive rubber strip filled in the blind groove.
4. The fixing assembly for dielectric filter debugging tooling according to claim 3 is characterized in that: The positioning plate is provided with an avoidance groove for the protrusion to pass through.
5. The fixing assembly for dielectric filter debugging tooling according to claim 4, characterized in that: The avoidance groove is connected with the positioning groove.
6. The fixing assembly for dielectric filter debugging tooling according to claim 2, characterized in that: The extension plate can move in a horizontal direction to adjust the size of the gap.
7. The fixing assembly for dielectric filter debugging tooling according to claim 2, characterized in that: The extension plate is provided with a window for detection and debugging, and a grinding tool can grind off the metal conductive layer on the front surface of the dielectric block through the window to complete the debugging.
8. The fixing assembly for dielectric filter debugging tooling according to claim 1, characterized in that: The projection of the horizontal fixing member in the up-down direction is in a concave shape. When the horizontal fixing member is pressed against the dielectric block, the horizontal fixing member and the positioning groove wrap around the dielectric block.
9. The fixing assembly for dielectric filter debugging tooling according to claim 1, characterized in that: The bottom plate is made of brass material.