CN111628254A

CN111628254A - Coupling piece fixing structure and filter

Info

Publication number: CN111628254A
Application number: CN202010367891.XA
Authority: CN
Inventors: 温世议; 陈启泰
Original assignee: Shenzhen Tatfook Technology Co Ltd
Current assignee: Shenzhen Tatfook Technology Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-09-04

Abstract

The invention provides a coupling piece fixing structure and a filter, which are fixed on the inner side of a cover plate and comprise a fixing seat, an adjusting rod and a coupling piece, wherein the fixing seat is abutted with the inner side wall of the cover plate, and the fixing seat is provided with a connecting hole; one end of the adjusting rod is connected with the connecting hole and ascends and descends in the connecting hole, a fixing hole for the adjusting rod to be inserted is formed in the coupling piece, and the coupling piece is detachably clamped inside the limiting ring groove. According to the coupling piece fixing structure, the adjusting rod penetrates through the fixing hole in the coupling piece, so that the coupling piece can be clamped and fixed in the limiting ring groove, the degree of freedom of the coupling piece in the length direction of the adjusting rod is limited through the limiting ring groove, the coupling piece is high in fixing stability in a rigid fixing mode, the coupling piece cannot fluctuate, and the coupling effect is poor.

Description

Coupling piece fixing structure and filter

Technical Field

The invention relates to the technical field of communication elements, in particular to a coupling piece fixing structure and a filter.

Background

The filter is a device or a circuit which has a processing function on signals, mainly has the main functions of enabling useful signals to pass through without attenuation as much as possible and enabling unwanted signals to be attenuated as much as possible, is commonly used as a frequency selection device for selecting communication signal frequencies and filtering noise waves or interference signals outside the communication signal frequencies, is widely applied to mobile base stations to reduce intermodulation signal interference and generate high-quality communication signals, and is an indispensable device in an electronic communication system.

In a cavity filter, a flying rod is commonly used to realize signal coupling between resonant rods of two adjacent cavities, the coupling strength is generally realized by controlling the size of the flying rod, and after the size of the flying rod is determined, the coupling strength between the cavities cannot be adjusted. Since the coupling strength between the cavities is sensitive to the size of the flying bar, the size of the flying bar needs to be repeatedly optimized in order to achieve a certain coupling strength, and the requirements on the machining precision and the installation process of the flying bar are high.

Chinese patent application publication No. CN206947485U discloses a cavity radio frequency device and a flying bar adjusting device thereof, which includes a flying bar base, a slider for carrying a flying bar, and a screw, wherein the top of the slider is provided with a threaded hole with a certain length, the screw is inserted into the threaded hole of the slider, and the screw is driven to rotate to drive the slider to move along the length direction of the screw, so as to adjust the height of the flying bar relative to the flying bar base.

The position of the flying rod is limited through the sliding block at the top end and the spring at the bottom end, the fixing structure is complex, the bottom of the flying rod is limited through the spring, the stability of the spring is poor, the flying rod can fluctuate, and the coupling effect is poor. However, the fly rod is directly and fixedly connected with the slide block or the screw, so that the fly rod is not easy to detach, the fly rods with different sizes cannot be replaced, and the adjustment of the coupling amount is inconvenient.

Disclosure of Invention

The invention aims to provide a coupling piece fixing structure and a filter, and aims to solve the technical problems that a flying rod fixing structure in the prior art is complex and can fluctuate to cause poor coupling effect or the flying rod is not easy to disassemble.

In order to achieve the purpose, the invention adopts the technical scheme that: provided is a coupling piece fixing structure which is fixed to an inner side of a cover plate, including: the fixing seat is abutted against the inner side wall of the cover plate and is provided with a connecting hole; one end of the adjusting rod is connected with the connecting hole and ascends and descends in the connecting hole, and a limiting ring groove is formed in the circumferential direction of the other end of the adjusting rod; the coupling piece is provided with a fixing hole for inserting the adjusting rod, and the coupling piece is detachably clamped inside the limiting ring groove.

Furthermore, the limit ring groove is far away from one end of the fixed seat is provided with an elastic limiting part, and the elastic limiting part can stretch through in a retractable manner after the fixed hole and is limited by the coupling piece.

Further, the elastic limiting part comprises at least two elastic protrusions which can be opened towards the outer side of the adjusting rod.

Furthermore, one side of the coupling piece is provided with an opening for the adjusting rod to be inserted into the fixing hole, and the opening is communicated with the fixing hole.

Further, the coupling member employs a flying bar sheet, a metal sheet, or an insulating sheet having a plating layer on a surface thereof.

Furthermore, the cover plate is provided with an adjusting hole, and the adjusting rod can penetrate through the adjusting hole and is in rotating sliding connection with the connecting hole so as to drive the coupling piece to lift.

Furthermore, the adjusting rod is in threaded connection with the connecting hole, and the aperture of the adjusting hole is larger than the outer diameter of the adjusting rod.

Furthermore, one side of the fixed seat is also provided with a sliding opening for the coupling piece to slide and adjust, and the coupling piece penetrates through the sliding opening.

Furthermore, one end of the adjusting rod, which is far away from the coupling piece, is also provided with a rotating groove used for being matched with an external rotating piece.

Furthermore, a self-locking piece is further arranged at one end, far away from the coupling piece, of the adjusting rod.

The present invention also provides a filter comprising: the coupling piece fixing structure comprises a cavity, at least two resonance rods arranged in the cavity and the coupling piece fixing structure arranged between every two adjacent resonance rods; and the cover plate covers the cavity, and the cover plate is provided with an adjusting hole for the adjusting rod to pass through.

Furthermore, a supporting partition board is convexly arranged in the cavity and is positioned between the two adjacent resonance rods, and a fixing opening for fixing the fixing seat is formed in the supporting partition board.

The coupling piece fixing structure and the filter have the advantages that: compared with the prior art, the coupling piece fixing structure has the advantages that the adjusting rod penetrates through the fixing hole in the coupling piece, so that the coupling piece can be clamped and fixed in the limiting ring groove, the degree of freedom of the coupling piece in the length direction of the adjusting rod is limited through the limiting ring groove, the integral fixing mode is simple, the rigid fixing mode is adopted, the fixing stability of the coupling piece is high, the coupling piece cannot fluctuate, and the problem of poor coupling effect is caused.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic perspective view of a filter according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a vertical cross-section structure of a filter according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a cavity and a fixing seat adopted in the filter according to the embodiment of the present invention;

fig. 4 is a first schematic perspective view of a coupling element fixing structure according to an embodiment of the present invention;

fig. 5 is a cross-sectional structural view of the coupling fixing structure shown in fig. 4;

fig. 6 is a perspective view illustrating a coupling member and an adjustment lever used in the coupling member fixing structure shown in fig. 4;

fig. 7 is a schematic perspective view illustrating a second embodiment of a coupling element fixing structure according to the present invention;

fig. 8 is a cross-sectional structural view of the coupling fixing structure shown in fig. 7;

fig. 9 is a perspective view illustrating a coupling member and an adjustment lever used in the coupling member fixing structure of fig. 7;

fig. 10 is a perspective view of a coupling member employed in the coupling member fixing structure shown in fig. 7.

Description of reference numerals:

1. a cavity; 2. a resonant rod; 3. a cover plate; 31. an adjustment hole; 4. supporting the partition plate; 41. a fixed opening; 5. a fixed seat; 51. connecting holes; 52. a slide opening; 53. an extension plate; 54. a groove; 521. a guide groove; 6. adjusting a rod; 61. a limiting ring groove; 62. an elastic limiting part; 63. a rotating groove; 621. an elastic bulge; 622. an avoidance groove; 7. a coupling member; 71. a fixing hole; 72. an opening; 73. a raised portion.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 3, a filter according to the present invention will now be described. The filter comprises a cavity 1, at least two resonance rods 2 arranged in the cavity 1, a coupling piece fixing structure arranged between the two adjacent resonance rods 2 and a cover plate 3 covering the cavity 1, wherein the cover plate 3 is provided with an adjusting hole 31 for the adjusting rod 6 to pass through. The cavity 1 is a resonant cavity with an opening 72 at the top end, the cover plate 3 directly covers the cavity 1, the resonant rods 2 are vertically arranged inside the cavity 1, and the coupling piece 7 is arranged between two adjacent resonant rods 2, but the coupling piece 7 may not be arranged between two adjacent resonant rods 2.

Wherein, cavity 1, resonance bar 2 and apron 3's structure all can directly adopt the conventional structure among the prior art, to its bottom snap-on of resonance bar 2 on the internal surface of cavity 1, the top is formed with empty cup, resonance bar 2's top can also be provided with coupling adjusting part, this coupling adjusting part generally includes screw rod (not sign in the figure) and nut (not sign in the figure), the outside of apron 3 is located to the nut, the screw rod passes nut and apron 3 and inserts to the empty cup on resonance bar 2 top in, through rotating the interval between screw rod adjusting screw rod and the resonance bar 2, it is prior art generally. An elastic pad (not marked in the figure) can be arranged between the nut and the cover plate 3, and self-locking is realized through the elastic pad.

Referring to fig. 4 to 10, a coupling element fixing structure according to the present invention will now be described. For the coupling piece fixing structure, the coupling piece fixing structure comprises a fixing seat 5, a coupling piece 7 and an adjusting rod 6, wherein the fixing seat 5 is abutted against the inner side wall of the cover plate 3, and the fixing seat 5 is provided with a connecting hole 51; one end of the adjusting rod 6 is connected with the connecting hole 51 and ascends and descends in the connecting hole 51, and a limiting ring groove 61 is formed in the circumferential direction of the other end of the adjusting rod; the coupling piece 7 is provided with a fixing hole 71 for inserting the adjusting rod 6, and the coupling piece 7 is detachably clamped inside the limiting ring groove 61.

Specifically, referring to fig. 2 and 3, a supporting partition plate 4 is convexly disposed in the cavity 1, the supporting partition plate 4 is located between two adjacent resonance rods 2, and a fixing opening 41 for fixing the fixing seat 5 is disposed on the supporting partition plate 4. Recess 54 has also been seted up to the both sides of fixing base 5, and fixing base 5 can insert to this fixed opening 41's inside, and the lateral wall of support baffle 4 can insert in recess 54 to prescribe a limit to the relative position of support baffle 4 and fixing base 5, because cavity 1 and apron 3 are fixed connection, consequently can prescribe a limit to the position of fixing base 5 through support baffle 4, and make fixing base 5 can laminate mutually and the butt with apron 3.

Wherein, the fixing base generally adopts insulating material to make, for example plastics or rubber material etc. the coupling piece 7 generally adopts and flies the pole piece, change into the slice from traditional dumbbell structure, be convenient for realize the batch manufacturing of mould, reduce material cost, and conveniently realize fixedly, set up fixed orifices 71 on the coupling piece 7 of slice more easily, adjust pole 6 and pass fixed orifices 71 and can dismantle with fixed orifices 71 and be connected, thereby carry on spacingly to coupling piece 7, make coupling piece 7 can go up and down along with the lift of adjusting pole 6. Certainly, according to actual conditions and specific requirements, the coupling piece 7 can still continuously adopt the fly rod with the dumbbell structure, and the middle part of the fly rod is provided with the fixing hole 71; alternatively, the coupling member 7 may also be made of a metal sheet, a plastic member having a plating layer on the surface thereof, or a PCB having a plating layer on the surface thereof, and the like, which is not limited herein.

Further, referring to fig. 4 and fig. 7, a sliding opening 52 for sliding adjustment of the coupling element 7 is further disposed on a side of the fixing base 5 away from the cover plate 3, and the coupling element 7 passes through the sliding opening 52. The fixing base 5 is formed with two extension plates 53 which are oppositely arranged on one side facing away from the cover plate 3, a sliding opening 52 is formed between the two extension plates 53, the adjusting rod 6 can slide up and down between the two extension plates 53 and drive the coupling piece 7 to slide in the sliding opening 52, the coupling piece 7 is arranged between the two extension plates 53, the sliding opening 52 extends from two ends of the coupling piece 7, and the position of the coupling piece 7 can be limited through the sliding opening 52.

Preferably, a guide groove 521 is formed in a side wall of the sliding opening 52, and protrusions 73 that are engaged with the guide groove 521 are protruded from both sides of the coupling member 7. That is, the inner side wall of the extension plate 53 is formed with a guide groove 521, and the guide groove 521 is engaged with the boss 73, so that the sliding path of the coupling member 7 can be limited, thereby preventing the coupling member 7 from rotating along with the adjustment lever 6 when rotating, and ensuring that the coupling member 7 has only a freedom of moving up and down. Of course, according to practical and specific requirements, in other embodiments of the present invention, the coupling member 7 may further include a guide slot 521, and the extension plate 53 may further include a protrusion 73, which is not limited herein.

For the detachable connection between the coupling element 7 and the adjusting rod 6, it is possible to provide a nut on the side of the adjusting rod 6 remote from the cover plate 3, so that the position of the coupling element 7 is defined by the nut, and it is also possible to provide an elastic cushion at the end of the adjusting rod 6, so that the elastic cushion can pass through the fixing hole 71 and return, but its stability is low, and it is also possible to define the position of the coupling element 7 by other means, which is not limited here.

Referring to fig. 4 to fig. 6, as a specific embodiment of the coupling member fixing structure provided in the present invention, in the present embodiment, a fixing hole 71 is formed on the coupling member 7, one end of the adjusting rod 6 is used for being connected to the cover plate 3, the other end of the adjusting rod is provided with a limiting ring groove 61, one end of the limiting ring groove 61 away from the cover plate 3 is provided with an elastic limiting member 62, and after the elastic limiting member 62 passes through the fixing hole 71, the coupling member 7 is engaged in the limiting ring groove 61. Specifically, the limiting ring groove 61 is an annular groove 54 formed at the bottom end of the adjusting rod 6, so that the coupling element 7 can be clamped in the limiting ring groove 61, the width of the limiting ring groove 61 is generally slightly larger than or equal to the thickness of the coupling element 7, one side of the coupling element 7 is limited by the inner edge of the limiting ring groove 61, and the other side of the coupling element 7 is limited by the elastic limiting element 62. The elastic limiting member 62 can be contracted under the action of external force and pass through the fixing hole 71, and expand to return to the original position after passing through the fixing hole 71 to limit the position of the coupling member 7.

Combine together through spacing annular 61 and elastic limiting part 62 and restrict coupling piece 7 along adjusting the ascending degree of freedom of pole 6 length direction, holistic fixed mode is simple, and adopt the fixed mode that rigidity and flexibility combined together, coupling piece 7's fixed stability is higher, coupling piece 7 can not take place undulant, lead to the problem of coupling effect variation, and elastic limiting part 62 can pass fixed orifices 71, and make coupling piece 7 can be detachably fixed in spacing annular 61, the removal of realization coupling piece 7 that can be convenient, interchangeability has been strengthened, the convenient change coupling piece 7, thereby adjust the coupling nature.

The elastic limiting member 62 includes at least two elastic protrusions 621 that can expand toward the outside of the adjusting lever 6. The resilient protrusions 621 may be made of the same material as the adjustment lever 6, and the avoidance grooves 622 are formed between the adjacent resilient protrusions 621. When the elastic limiting element 62 passes through the fixing hole 71, the elastic protrusion 621 may deform toward the avoiding groove 622, so that the entire elastic limiting element 62 may pass through the fixing hole 71; after passing through the fixing hole 71, the elastic protrusion 621 returns, and the position of the coupling member 7 is defined by the elastic protrusion 621 and the inner wall of the stopper ring groove 61.

Preferably, the longitudinal cross-sectional shape of the elastic limiting member 62 is a cone, and the maximum length or width of the side of the elastic limiting member 62 away from the cover plate 3 is smaller than the diameter of the fixing hole 71, and the maximum length or width of the side of the elastic limiting member 62 close to the cover plate 3 is larger than the diameter of the fixing hole 71. The elastic limiting member 62 is set to be of a conical structure, so that the elastic limiting member 62 can be more smoothly inserted into the fixing hole 71, the fixing hole 71 limits the elastic protrusion 621, the elastic protrusion 621 avoids the inward avoiding groove 622, the whole elastic limiting member 62 can easily pass through the fixing hole 71, and then the position of the coupling member 7 is limited by the side, close to the cover plate 3, of the elastic limiting member 62. By adopting the structure, a rigid connection mode is still adopted, the stability of possible fluctuation caused by elastic limitation can be effectively avoided, the stability is higher, the installation is convenient, and no additional fixing piece is required to be added.

Referring to fig. 7 to 10, as a specific embodiment of the coupling member fixing structure provided by the present invention, in this embodiment, a fixing hole 71 is also formed on the coupling member 7, one end of the adjusting rod 6 is used for connecting with the cover plate 3, and the other end is provided with a limiting ring groove 61, and the coupling member 7 can be engaged in the limiting ring groove 61. Specifically, the limiting ring groove 61 is an annular groove 54 formed in the bottom end of the adjusting rod 6, so that the coupling piece 7 can be clamped in the limiting ring groove 61, limiting walls are formed between the two ends of the limiting ring groove 61 and the adjusting rod 6, the coupling piece 7 is limited between the two limiting walls, and the distance between the two limiting walls is generally slightly larger than or equal to the thickness of the coupling piece 7.

Specifically, an opening 72 for inserting the adjusting rod 6 into the fixing hole 71 is formed in one side of the coupling piece 7, and the opening 72 is communicated with the fixing hole 71. The limiting groove 54 of the adjusting rod 6 can be inserted into the fixing hole 71 from the side opening 72 of the coupling piece 7, so that the adjusting rod 6 and the coupling piece 7 can be relatively fixed, the structure is simpler, only one communicated opening 72 needs to be formed in one side of the fixing hole 71, and the adjusting rod is easy to process and convenient to clamp.

Preferably, the width of the opening 72 is smaller than the diameter of the fixing hole 71 so that the adjustment lever 6 can be inserted into the inside of the fixing hole 71 through the opening 72 without being released from the inside of the fixing hole 71. And the opening 72 faces the side wall of the slide opening 52 so that the adjustment lever 6 is defined by the side wall of the slide opening 52, preventing the adjustment lever 6 from slipping out of the opening 72, thereby ensuring the fixing stability between the coupling member 7 and the adjustment lever 6.

Further, as a specific embodiment of the coupling piece fixing structure provided by the present invention, the adjusting rod 6 generally adopts a screw, the connecting hole 51 on the fixing base 5 is a threaded hole, the adjusting rod 6 is inserted into the connecting hole 51 and is in threaded connection with the connecting hole 51, so as to adjust the depth of the adjusting rod 6 inserted into the cavity 1, and then adjust the position of the coupling piece 7 in the cavity 1, at this time, the coupling amount can be adjusted without replacing the coupling piece 7, and the adjusting mode is simpler. The adjusting rod 6 can be made of an insulating material, such as ceramic or rigid plastic, or a non-insulating material, such as metal. The end of the adjusting rod 6 can be formed with a rotating groove 63, the shape of the rotating groove 63 is non-circular, and the rotating groove can be generally in a cross shape or a hexagon shape, and can be matched with an external wrench or a screwdriver and other tools to conveniently realize the rotation of the adjusting rod 6. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the adjusting rod 6 and the connecting hole 51 may be connected by using other methods, so that the adjusting rod 6 can slide and lift in the connecting hole 51, for example: the connecting hole 51 is internally provided with an arc-shaped thread groove, the outer edge of the adjusting rod 6 is convexly provided with a convex block, the convex block can be inserted into the arc-shaped thread groove, and the convex block can rotate and lift in the arc-shaped thread groove without only limitation.

Preferably, the connection hole 51 may be fully threaded so that the inside of the connection hole 51 is entirely engaged with the adjustment lever 6 to achieve threaded connection, or only a part of the threads may be formed on the top of the connection hole 51 so that the part of the connection hole 51 is engaged with the adjustment lever 6 to achieve threaded connection, which is not limited herein.

Further, referring to fig. 2, as a specific embodiment of the coupling fixing structure provided in the present invention, an adjusting hole 31 is formed on the cover plate 3, and the adjusting rod 6 can pass through the adjusting hole 31 and is connected to the connecting hole 51 in a sliding manner so as to drive the coupling 7 to move up and down. Adjust pole 6 and connecting hole 51 and rotate and be connected, and adjust the top of pole 6 and can pass regulation hole 31, the rotation that the pole 6 had both been adjusted in the outside that is located apron 3 can the drive, do not need to demolish apron 3 and cavity 1 this moment and both can realize the lift of coupling piece 7, realize the regulation of coupling volume then, holistic fixed mode is simple, and adopt the mode of rigid fixation, the fixed stability of coupling piece 7 is higher, coupling piece 7 can not take place undulantly, lead to the problem of coupling effect variation.

Preferably, the aperture of the adjusting hole 31 is larger than the outer diameter of the adjusting rod 6, so that the adjusting hole 31 is not in direct contact with the adjusting rod 6, the adjusting hole 31 is a space and an area for the rotation of the adjusting rod 6, the processing of the adjusting hole 31 has low requirement on precision, and the production cost can be reduced.

Furthermore, a self-locking piece (not shown) is further disposed at an end of the adjusting rod 6 away from the coupling piece 7, and the self-locking piece prevents the adjusting rod 6 from loosening, so as to ensure the stability of the coupling amount of the coupling piece 7. The self-locking piece can adopt the inside point glue in adjusting hole 31, adopts glue to adjust the clearance packing in pole 6 and the adjusting hole 31 to avoid adjusting the rotation of pole 6, its processing method is simple. Alternatively, self-locking is achieved by means of mechanical structures, such as: a nut is arranged at one end of the adjusting rod 6, which is far away from the coupling piece 7, an elastic pad is arranged between the nut and the cover plate 3 in a cushioning manner, and the adjusting rod 6 is locked on the cover plate 3 through the combination of the nut and the elastic pad, so that the adjusting rod 6 is prevented from loosening; or, the axial pre-tightening force generated by changing the fit interference among the adjusting rod 6, the fixing hole 71 and the connecting hole 51 realizes the self-locking and anti-loosening of the screw thread, and the method is not limited herein.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. Coupling piece fixed knot constructs, its inboard that is fixed in apron (3), its characterized in that includes:

the fixing seat (5) is abutted against the inner side wall of the cover plate (3), and a connecting hole (51) is formed in the fixing seat (5);

one end of the adjusting rod (6) is connected with the connecting hole (51) and is lifted in the connecting hole (51), and a limiting ring groove (61) is formed in the circumferential direction of the other end of the adjusting rod (6); and

coupling piece (7), offer on coupling piece (7) and supply adjust pole (6) male fixed orifices (71), just coupling piece (7) detachable block in the inside of spacing annular (61).

2. The coupling fixing structure according to claim 1, wherein: keep away from spacing annular (61) the one end of fixing base (5) is equipped with elasticity locating part (62), elasticity locating part (62) are collapsible to be passed behind fixed orifices (71) and right coupling piece (7) are spacing.

3. The coupling fixing structure according to claim 2, wherein: the elastic limiting part (62) comprises at least two elastic bulges (621) which can be opened towards the outer side of the adjusting rod (6).

4. The coupling fixing structure according to claim 1, wherein: an opening (72) for inserting the adjusting rod (6) into the fixing hole (71) is formed in one side of the coupling piece (7), and the opening (72) is communicated with the fixing hole (71).

5. The coupling fixing structure according to any one of claims 1 to 4, wherein: the coupling piece (7) adopts a flying rod sheet, a metal sheet or an insulating sheet with a plating layer on the surface.

6. The coupling fixing structure according to any one of claims 1 to 4, wherein: the cover plate (3) is provided with an adjusting hole (31), and the adjusting rod (6) can penetrate through the adjusting hole (31) and is in rotating sliding connection with the connecting hole (51) so as to drive the coupling piece (7) to lift.

7. The coupling fixing structure of claim 6, wherein: the adjusting rod (6) is in threaded connection with the connecting hole (51), and the aperture of the adjusting hole (31) is larger than the outer diameter of the adjusting rod (6).

8. The coupling fixing structure according to any one of claims 1 to 4, wherein: one side of the fixed seat (5) is also provided with a sliding opening (52) for the coupling piece (7) to slide and adjust, and the coupling piece (7) penetrates through the sliding opening (52).

9. The coupling fixing structure according to any one of claims 1 to 4, wherein: one end of the adjusting rod (6) far away from the coupling piece (7) is also provided with a rotating groove (63) used for being matched with an external rotating piece.

10. The coupling fixing structure according to any one of claims 1 to 4, wherein: and a self-locking piece is further arranged at one end, far away from the coupling piece (7), of the adjusting rod (6).

11. A filter, comprising:

a cavity (1);

at least two resonance rods (2) arranged in the cavity (1);

the coupling piece fixing structure according to any one of claims 1 to 10 provided between adjacent two of the resonance rods (2); and

the cover plate (3) is covered on the cavity (1), and the cover plate (3) is provided with an adjusting hole (31) for the adjusting rod (6) to pass through.

12. The filter of claim 11, wherein: the resonant vibration isolation structure is characterized in that a supporting partition plate (4) is arranged in the cavity (1) in a protruding mode, the supporting partition plate (4) is located between two adjacent resonant rods (2), and a fixing opening (41) used for fixing the fixing seat (5) is formed in the supporting partition plate (4).