CN115799784A - Clutch type switch switching filter set - Google Patents
Clutch type switch switching filter set Download PDFInfo
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- CN115799784A CN115799784A CN202310046183.XA CN202310046183A CN115799784A CN 115799784 A CN115799784 A CN 115799784A CN 202310046183 A CN202310046183 A CN 202310046183A CN 115799784 A CN115799784 A CN 115799784A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a clutch type switch switching filter group, which realizes the mechanical switching of the switch filter group by adopting a clutch type switching function. By designing different fixed shafts and switching shafts, the flexible adjustment of the switch filter bank is realized, and the frequency selection function of different functions of different frequency bands is adapted; through the serial switching shaft, the N x 6-path matrix type switch filter bank can be realized, and more complex frequency selection characteristics are realized; by adopting a three-dimensional design structure, the plane size is saved, and the device can be better applied to the environment with compact structure. The on-off switching selection of various frequency bands can be realized under the condition of no power supply, and the clutch type on-off switching filter bank has the advantages of simple circuit, high reliability, excellent index, flexible use, wide market application prospect and suitability for popularization and application.
Description
Technical Field
The invention relates to the technical field of radar communication equipment, in particular to a clutch type switch switching filter group.
Background
With the further development of communication electronic technology, frequency-selecting networks such as switch filter banks and the like are widely applied. The frequency synthesizer, the broadband receiver, the broadband transmitter and the like all require good quality and high spectrum purity of frequency selection signals, so that the importance of a frequency selection network such as a switch filter and the like as a frequency selection component is determined. With the development of simulation technology, the implementation mode and the implementation performance of the filter are different from each other. The general switch filter bank mainly comprises filters with different frequency bands or functions, a selection switch and the like. The existence of the selector switch means that an external feeding mode is needed to ensure the normal work of the switch, so that the application scene of the switch filter bank is greatly limited, and the application becomes more complex; meanwhile, the existence of the selective switch also means extra insertion loss waste, the noise coefficient of the receiver can be directly increased in the application of the receiver, the sensitivity of the receiver is reduced, and the detection distance of the receiver is greatly reduced. After the existing switch filter bank is designed and manufactured, the application environment is also shaped, subsequent adjustment is difficult, and the adjustment of filter parameters and the like can be realized only in a destructive mode. In addition, most of the existing switch filter banks are based on a planar design structure, so that the planar size is large, the waste is excessive, and the switch filter banks cannot be used in environments with compact structures.
Disclosure of Invention
The invention aims to provide a clutch type switch switching filter group. The problems that an existing switch filter bank needs external feeding, insertion loss is large, adjustment is not flexible, the structure is not compact and the like are mainly solved.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
the filter comprises a filter fixed mounting shaft, a filter movable mounting shaft, an electrical connection assembly and a meshing fixing assembly, wherein a plurality of thin film micro-strip filters are arranged on the filter fixed mounting shaft and the filter movable mounting shaft, the filter fixed mounting shaft and the filter movable mounting shaft are rotatably connected through the meshing fixing assembly, and the filters between the filter fixed mounting shaft and the filter movable mounting shaft are connected through the electrical connection assembly.
Filter fixed mounting axle includes mechanical structure spare fixed axle, flat slot and structure spare fixed axle through-hole, the periphery of mechanical structure spare fixed axle sets up a plurality ofly the flat slot is a plurality of all be provided with film microstrip filter in the flat slot, structure spare fixed axle through-hole run through set up in the middle part of mechanical structure spare fixed axle, the one end of mechanical structure spare fixed axle with pass through between the wave filter movable mounting axle the fixed subassembly of meshing rotates to be connected, the one end of mechanical structure spare fixed axle with film microstrip filter between the one end of wave filter movable mounting axle passes through electric property coupling assembling and can dismantle the connection, the mechanical structure spare fixed axle passes through structure spare fixed axle through-hole and meshes the fixed subassembly and is connected.
Wave filter movable mounting axle includes mechanical structure spare change shaft and structure change shaft screw hole, the periphery of mechanical structure spare change shaft sets up a plurality ofly the flat-bottom groove is a plurality of all be provided with film microstrip filter in the flat-bottom inslot, the one end of mechanical structure spare change shaft with pass through between the one end of mechanical structure spare fixed axle the fixed subassembly of meshing rotates to be connected, the epaxial film microstrip filter of mechanical structure spare change shaft with the fixed epaxial film microstrip filter's of mechanical structure spare one end is passed through electrical property coupling assembling can dismantle the connection, the mechanical structure spare change shaft passes through structure spare change shaft screw hole with the fixed subassembly of meshing is connected.
As an improvement, each flat bottom groove is provided with a chord cover, and the chord cover is detachably connected with the mechanical structure fixing shaft or the mechanical structure conversion shaft.
The fixed subassembly of meshing includes switching handle, spring, fixed spherical end clutch lever, step inclined plane guide way and sphere bottom outlet, the one end of fixed spherical end clutch lever with fixed connection can be dismantled to the terminal surface of mechanical structure spare change shaft, the other end of fixed spherical end clutch lever is the bulb structure, the mechanical structure spare fixed axle with the relative terminal surface of mechanical structure spare change shaft is provided with a plurality ofly the sphere bottom outlet, adjacent two set up between the sphere bottom outlet step inclined plane guide way, the bulb end of fixed spherical end clutch lever can insert in the sphere bottom outlet, the one end of switching the handle is passed behind the fixed epaxial structure spare fixed axle through-hole of mechanical structure spare with fixed connection can be dismantled to the epaxial structure spare change shaft screw hole of mechanical structure spare change shaft, the mechanical structure spare fixed axle with rotate between the switching handle and be connected, the other end of switching the handle with set up between the mechanical structure spare fixed axle the spring.
The electrical connection assembly comprises a plurality of blind-insertion type radio frequency connector plugs and a plurality of blind-insertion type radio frequency connector sockets, the blind-insertion type radio frequency connector plugs are fixed on the end face of the mechanical structure conversion shaft, each blind-insertion type radio frequency connector plug is electrically connected with one end of a thin film micro-strip filter arranged on the mechanical structure conversion shaft, the other end of the thin film micro-strip filter arranged on the mechanical structure conversion shaft is exposed out of the other end face of the mechanical structure conversion shaft, the blind-insertion type radio frequency connector sockets are fixed on the end face, opposite to the mechanical structure conversion shaft, of the mechanical structure fixed shaft, the blind-insertion type radio frequency connector sockets are multiple, each blind-insertion type radio frequency connector socket is electrically connected with one end of the thin film micro-strip filter arranged on the mechanical structure fixed shaft, and the other end of the thin film micro-strip filter arranged on the mechanical structure fixed shaft is exposed out of the other end face of the mechanical structure fixed shaft.
Preferably, the inner surface of the flat-bottom groove is coated with an electrochemical gold plating layer.
The beneficial effects of the invention are:
the invention relates to a clutch type switch switching filter group, which realizes the mechanical switching of the switch filter group by adopting a clutch type switching function compared with the prior art. The clutch type switching can ensure that the normal work of the switch filter bank is realized in the application occasions where the external field cannot supply power; the clutch type switch switching filter bank cancels a selection switch of the traditional switch filter bank, reduces the insertion loss of the switch filter bank, directly reduces the noise coefficient of the receiver in the application of the receiver, improves the sensitivity of the receiver and enhances the detection distance of the receiver; the clutch type switch switching filter bank realizes flexible adjustment of the switch filter bank by designing different fixed shafts and switching shafts, and is suitable for frequency selection of different functions of different frequency bands; through the serial switching shaft, an N x 6 matrix type switch filter bank can be realized, and more complex frequency selection characteristics can be realized; by adopting a three-dimensional design structure, the plane size is saved, and the device can be better applied to the environment with compact structure. The on-off switching selection of various frequency bands can be realized under the condition of no power supply, and the clutch type on-off switching filter bank has the advantages of simple circuit, high reliability, excellent index, flexible use, wide market application prospect and suitability for popularization and application.
Drawings
FIG. 1 is a schematic view of an exploded structure of the present invention;
FIG. 2 is a schematic view of the rotation process of the present invention;
FIG. 3 is a structural schematic diagram of the locked state of the present invention;
FIG. 4 is a schematic view of a plug and socket portion of the present invention;
FIG. 5 is a schematic view of the overall external structure of the present invention;
FIG. 6 is a 12GHz high pass filter simulation curve of the present invention;
FIG. 7 is a simulation curve for a 13GHz high-pass filter of the invention;
FIG. 8 is a 14GHz high-pass filter simulation curve of the invention;
FIG. 9 is a 15GHz high-pass filter simulation curve of the invention;
FIG. 10 is a 16GHz high pass filter simulation curve of the present invention;
FIG. 11 is a 17GHz high pass filter simulation curve of the invention;
FIG. 12 is a simulation curve for a 13GHz low-pass filter of the invention;
FIG. 13 is a 14GHz low-pass filter simulation curve of the invention;
FIG. 14 is a simulation plot of a 15GHz low-pass filter of the invention;
FIG. 15 is a 16GHz low-pass filter simulation curve of the invention;
FIG. 16 is a 17GHz low-pass filter simulation curve of the invention;
FIG. 17 is a simulation curve for an 18GHz low-pass filter of the invention.
In the figure: the device comprises a mechanical structural part fixing shaft 1, a flat bottom groove 2, a thin film microstrip filter 3, a thin film microstrip filter signal end 4, a structural part fixing shaft through hole 5, a chord cover 6, a mechanical structural part conversion shaft 7, a structural part conversion shaft threaded hole 8, a blind-mate type radio frequency connector plug 9, a blind-mate type radio frequency connector socket 10, a fixed spherical end clutch lever 11, a switching handle 12, a spring 13, a step inclined plane guide groove 14 and a spherical bottom hole 15.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1-5: the filter comprises a filter fixed mounting shaft, a filter movable mounting shaft, an electrical connection assembly and a meshing fixing assembly, wherein a plurality of thin film micro-strip filters 3 are arranged on the filter fixed mounting shaft and the filter movable mounting shaft, the filter fixed mounting shaft and the filter movable mounting shaft are rotatably connected through the meshing fixing assembly, and the filters between the filter fixed mounting shaft and the filter movable mounting shaft are connected through the electrical connection assembly.
Filter fixed mounting axle includes mechanical structure spare fixed axle 1, flat slot 2 and structure fixed axle through-hole 5, the periphery of mechanical structure spare fixed axle 1 sets up a plurality ofly flat slot 2 is a plurality of all be provided with film microstrip filter 3 in the flat slot 2, structure fixed axle through-hole 5 run through set up in mechanical structure spare fixed axle 1's middle part, mechanical structure spare fixed axle 1's one end with pass through between the wave filter movable mounting axle the fixed subassembly of meshing rotates to be connected, mechanical structure spare fixed axle 1's one end with film microstrip filter 3 between the one end of wave filter movable mounting axle can dismantle the connection through electric connection subassembly, mechanical structure spare fixed axle 1 passes through structure spare fixed axle through-hole 5 and is connected with the fixed subassembly of meshing.
Filter movable mounting axle includes mechanical structure spare change shaft 7 and structure spare change shaft screw hole 8, the periphery of mechanical structure spare change shaft 7 sets up a plurality ofly flat bottom groove 2 is a plurality of all be provided with film microstrip filter 3 in the flat bottom groove 2, the one end of mechanical structure spare change shaft 7 with pass through between the one end of mechanical structure spare fixed axle 1 the fixed subassembly of meshing rotates to be connected, film microstrip filter 3 on the mechanical structure spare change shaft 7 with the one end of the film microstrip filter 3 on the mechanical structure spare fixed axle 1 is passed through electric property coupling assembling can dismantle the connection, mechanical structure spare change shaft 7 passes through structure spare change shaft screw hole 8 with the fixed subassembly of meshing is connected.
As a modification, each flat bottom groove 2 is provided with a string cover 6, and the string cover 6 is detachably connected with the mechanical structure fixing shaft 1 or the string cover 6 is detachably connected with the mechanical structure conversion shaft 7.
The meshing fixing assembly comprises a switching handle 12, a spring 13, a fixed spherical end clutch lever 11, a step inclined plane guide groove 14 and a spherical bottom hole 15, one end of the fixed spherical end clutch lever 11 is detachably and fixedly connected with the end face of the mechanical structure part conversion shaft 7, the other end of the fixed spherical end clutch lever 11 is of a ball head structure, the end face, opposite to the mechanical structure part conversion shaft 7, of the mechanical structure part fixing shaft 1 is provided with a plurality of spherical bottom holes 15, the two adjacent spherical bottom holes 15 are provided with the step inclined plane guide groove 14, the ball head end of the fixed spherical end clutch lever 11 can be inserted into the spherical bottom hole 15, one end of the switching handle 12 penetrates through a structure part fixing shaft through hole 5 in the mechanical structure part fixing shaft 1 and then is detachably and fixedly connected with a structure part conversion shaft threaded hole 8 in the mechanical structure part conversion shaft 7, the mechanical structure part fixing shaft 1 is rotatably connected with the switching handle 12, and the spring 13 is arranged between the other end of the switching handle 12 and the mechanical structure part fixing shaft 1.
The electrical connection assembly comprises a plurality of blind-plugging radio frequency connector plugs 9 and blind-plugging radio frequency connector sockets 10, the blind-plugging radio frequency connector plugs 9 are fixed on the end face of the mechanical structure conversion shaft 7, the blind-plugging radio frequency connector plugs 9 are multiple, each blind-plugging radio frequency connector plug 9 is electrically connected with one end of a thin film micro-strip filter 3 arranged on the mechanical structure conversion shaft 7, the other end of the thin film micro-strip filter 3 arranged on the mechanical structure conversion shaft 7 is exposed out of the other end face of the mechanical structure conversion shaft 7, the blind-plugging radio frequency connector sockets 10 are fixed on the end face, opposite to the mechanical structure conversion shaft 1 and the mechanical structure conversion shaft 7, of the blind-plugging radio frequency connector sockets 10 are multiple, each blind-plugging radio frequency connector socket 10 is electrically connected with one end of the thin film micro-strip filter 3 arranged on the mechanical structure conversion shaft 1, and the other end of the thin film micro-strip filter 3 arranged on the mechanical structure conversion shaft 1 is exposed out of the other end face of the mechanical structure conversion shaft 1.
Preferably, the inner surface of the flat-bottom groove 2 is coated with an electrochemical gold plating layer.
Example (b):
as shown in fig. 1-17: in this embodiment, a planar and three-dimensional electromagnetic simulation technology is used to design a thin-film microstrip high-pass filter with 6 frequency bands of 12GHz, 13GHz, 14GHz, 15GHz, 16GHz, and 17GHz, and a thin-film microstrip low-pass filter with 6 frequency bands of 13GHz, 14GHz, 15GHz, 16GHz, 17GHz, and 18 GHz. The 6-type thin film micro-strip high-pass filter is arranged and adhered on the mechanical structural part fixing shaft 1 in a clockwise sequence, and the 6-type thin film micro-strip low-pass filter is arranged and adhered on the mechanical structural part conversion shaft 7 in a clockwise sequence. Through clutch type switching, the 2*6 matrix type switch filtering group is realized, direct connection, dot frequency, 1GHz, 2GHz, 3GHz, 4GHz, 5GHz and 6GHz multiple bandwidth frequency selection output can be realized, and specific frequency band selection is shown in table 1. The engaging ends of the fixed shaft and the switching shaft are respectively provided with a blind-mate radio frequency connector plug and a socket, the outer side end is provided with various input and output ports in different forms according to the requirements of users and is sealed by a string cover,
the outer circle of the mechanical structural part fixing shaft 1 is uniformly provided with 6 flat-bottom grooves 2, the inner surfaces of the flat-bottom grooves 2 adopt an electrochemical gold plating process to ensure reliable welding and electrical performance, the flat-bottom grooves are used for bonding and installing the film micro-strip filters 3 with different frequency bands and functions, and the chord covers 6 are designed and fixed by screws; the end face is provided with 6 groups of screw holes for installing a blind-plugging radio frequency connector socket 10 at the corresponding position of a signal end 4 of the thin-film microstrip filter, and an outer end signal is designed into a corresponding radio frequency port form according to requirements; an opening is designed in the center of the meshing surface, 6 ball-type bottom holes 15 and inclined plane grooves 14 for clutch switching are uniformly distributed and designed, the bottom holes are connected end to end in a circulating mode, and chamfer processing is designed on each sharp edge in each groove to guarantee effective smooth motion switching during clutch switching of the spherical end clutch rod 11;
the outer circle of the mechanical structural part conversion shaft 7 is uniformly provided with 6 flat-bottom grooves 2, the inner surfaces of the flat-bottom grooves 2 adopt an electrochemical gold plating process, reliable welding and electrical performance are guaranteed, and the mechanical structural part conversion shaft is used for bonding and installing the thin-film microstrip filters 3 with different frequency bands; the outer end face is provided with 6 groups of screw holes for installing a blind-plugging radio frequency connector plug 9 at the corresponding position of the signal end of the thin film microstrip filter 3, and the outer end signal is designed into a corresponding radio frequency port form according to the requirement; threaded holes are designed in the center of the meshing surface and are used for being fixedly matched with the switching handle 12, and threaded holes for installing and fixing the spherical end clutch rod 11 are uniformly distributed at 6 positions and correspond to the spherical bottom holes 15; the switching handle 12 penetrates through the mechanical structural part fixing shaft 1 and can freely and flexibly rotate;
one end of the switching handle 12 is a circular surface to ensure smooth switching, and the other end is designed to be an external thread to be fastened and screwed on the central threaded hole 8 of the mechanical structure part switching shaft 7, and the material is stainless steel with wear resistance and low processing surface roughness;
selecting corresponding plates and a proper manufacturing process for the thin-film microstrip filter 3 with different frequency bands and functions according to design rules, producing a corresponding thin-film microstrip filter circuit board, installing the thin-film microstrip filter 3 at a corresponding position according to the requirements of a switch filtering group or a frequency selection function, and respectively welding an input port and an output port on a radio-frequency connection transmission conductor needle;
based on the plugging and unplugging engaging force of the blind plugging type radio frequency connector plug 9 and the blind plugging type radio frequency connector socket 10, a spring 13 with proper specification performance needs to be selected on the excircle of the switching handle 12, and according to a spring stiffness formula k = Gd 4 /8nD 3 G = shear modulus Mpa, D = spring material diameter, n = effective number of spring turns, D = spring outer diameter, and a spring 13 suitable for use is selected. When the micro-strip filter is in work, the switching handle 12 is pressed down and rotates, the filtering function of a clutch type switch of the micro-strip filter group can be realized, and the micro-strip filter is free and flexible.
When the switch handle 12 compresses the spring 13 inwards and rotates again, the ball-end clutch rod 11 is disengaged from the constraint limit of the ball-bottom hole 15 and performs axial separation movement. When the spherical end clutch rod 11 rotates, the spherical end clutch rod moves to the step inclined plane guide groove 14, and the mechanical structural part conversion shaft 7 is driven to do meshing sliding motion under the action of the contraction force of the spring 13, so that the automatic rotation sliding to the next spherical bottom hole 15 is realized in the process, and the self-locking constraint is realized. Obviously, the alternate and cyclic switching of the mechanical structure part fixed shaft 1 and the mechanical structure part conversion shaft 7 realizes the working principle of the clutch type switch switching filter group.
Table 1 matrix clutch switch filter group frequency-selecting band table
The technical solution of the present invention is not limited to the above-mentioned specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (7)
1. A clutch type switch switching filter group is characterized in that: including wave filter fixed mounting axle, wave filter movable mounting axle, electrical property coupling assembling and the fixed subassembly of meshing, wave filter fixed mounting axle with wave filter movable mounting epaxial all sets up a plurality of film microstrip filter (3), wave filter fixed mounting axle with pass through between the wave filter movable mounting axle the fixed subassembly of meshing rotates to be connected, wave filter fixed mounting axle with wave filter between the wave filter movable mounting axle passes through electrical property coupling assembling connects.
2. The on-off switch-over filter group according to claim 1, characterized in that: filter fixed mounting axle includes mechanical structure spare fixed axle (1), flat groove (2) and structure spare fixed axle through-hole (5), the periphery of mechanical structure spare fixed axle (1) sets up a plurality ofly flat groove (2), a plurality of all be provided with film microstrip filter (3) in flat groove (2), structure spare fixed axle through-hole (5) run through set up in the middle part of mechanical structure spare fixed axle (1), the one end of mechanical structure spare fixed axle (1) with pass through between the wave filter movable mounting axle the fixed subassembly of meshing rotates and connects, the one end of mechanical structure spare fixed axle (1) with film microstrip filter (3) between the one end of wave filter movable mounting axle can dismantle the connection through electric connection subassembly, mechanical structure spare fixed axle (1) is connected with the fixed subassembly of meshing through structure spare fixed axle through-hole (5).
3. The on-off switch-over filter group according to claim 2, characterized in that: filter movable mounting axle includes mechanical structure spare change shaft (7) and structure spare change shaft screw hole (8), the periphery of mechanical structure spare change shaft (7) sets up a plurality ofly flat slot (2), it is a plurality of all be provided with film microstrip filter (3) in flat slot (2), the one end of mechanical structure spare change shaft (7) with pass through between the one end of mechanical structure spare fixed axle (1) the fixed subassembly of meshing rotates to be connected, film microstrip filter (3) on mechanical structure spare change shaft (7) with the one end of film microstrip filter (3) on mechanical structure spare fixed axle (1) passes through electric property coupling assembling can dismantle the connection, mechanical structure spare change shaft (7) pass through structure spare change shaft screw hole (8) with the fixed subassembly of meshing is connected.
4. The on-off switch-over filter group according to claim 3, characterized in that: each flat-bottom groove (2) is provided with a chord cover (6), and the chord cover (6) is detachably connected with the mechanical structure fixing shaft (1) or the chord cover (6) is detachably connected with the mechanical structure conversion shaft (7).
5. The on-off switch-over filter group according to claim 3, characterized in that: the fixed subassembly of meshing is including switching handle (12), spring (13), fixed spherical end trip lever (11), step inclined plane guide way (14) and sphere bottom outlet (15), the one end of fixed spherical end trip lever (11) with the connection can be dismantled to the terminal surface of mechanical structure spare change-over spindle (7), the other end of fixed spherical end trip lever (11) is the bulb structure, mechanical structure spare fixed axle (1) with the relative terminal surface of mechanical structure spare change-over spindle (7) is provided with a plurality ofly sphere bottom outlet (15), adjacent two set up between sphere bottom outlet (15) step inclined plane guide way (14), the bulb end of fixed spherical end trip lever (11) can insert in sphere bottom outlet (15), the one end of switching handle (12) is passed behind the structure spare fixed axle through-hole (5) on mechanical structure spare fixed axle (1) with structure spare change-over spindle screw hole (8) on mechanical structure spare change-over spindle (7) can dismantle and connect, mechanical structure spare fixed axle (1) with switch between handle (12) and rotate and be connected, the other end of switching handle (12) and set up between the mechanical structure spare spring (13) between the fixed axle (1).
6. The on-off switching filter group according to claim 3, characterized in that: the electrical connection assembly comprises a blind-plugging radio frequency connector plug (9) and a plurality of blind-plugging radio frequency connector sockets (10), the blind-plugging radio frequency connector plugs (9) are fixed on the end face of the mechanical structure conversion shaft (7), each blind-plugging radio frequency connector plug (9) is electrically connected with one end of a thin film microstrip filter (3) arranged on the mechanical structure conversion shaft (7), the other end of the thin film microstrip filter (3) arranged on the mechanical structure conversion shaft (7) is exposed out of the other end face of the mechanical structure conversion shaft (7), the blind-plugging radio frequency connector sockets (10) are fixed on the end face of the mechanical structure fixing shaft (1) opposite to the mechanical structure conversion shaft (7), the blind-plugging radio frequency connector sockets (10) are multiple, each blind-plugging radio frequency connector socket (10) is electrically connected with one end of the thin film microstrip filter (3) arranged on the mechanical structure (1), and the other end of the thin film microstrip filter (3) arranged on the mechanical structure (1) is exposed out of the mechanical structure fixing shaft (1).
7. The on-off switch-over filter group according to claim 2 or 3, characterized in that: the inner surface of the flat bottom groove (2) is coated with an electrochemical gold plating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310046183.XA CN115799784B (en) | 2023-01-31 | 2023-01-31 | Clutch type switch switching filter group |
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|---|---|---|---|
| CN202310046183.XA CN115799784B (en) | 2023-01-31 | 2023-01-31 | Clutch type switch switching filter group |
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| CN115799784A true CN115799784A (en) | 2023-03-14 |
| CN115799784B CN115799784B (en) | 2023-05-12 |
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| CN115799784B (en) | 2023-05-12 |
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