CN221805811U - Coupling adjusting structure and filter - Google Patents

Abstract

The utility model relates to the field of communication technology, and provides a coupling adjustment structure and a filter. The coupling adjustment structure includes a connecting piece, two coupling pieces, a first mounting piece and a second mounting piece. The coupling pieces have a height direction, a thickness direction and a width direction that are perpendicular to each other. The projection area of the coupling piece in the thickness direction is larger than the projection area of the coupling piece in the width direction. The coupling piece has a first end and a second end in the height direction. The first ends of the two coupling pieces are respectively connected to the two ends of the connecting piece, the first mounting piece and the second mounting piece are connected to the second end, the first mounting piece and the second mounting piece are spaced apart in the height direction to form a clamping interval, and the first mounting piece is located above the second mounting piece. The coupling adjustment structure is a sheet structure, and the weight is greatly reduced, which is conducive to realizing the lightweight design of the coupling adjustment structure and the filter.

Description

Coupling adjusting structure and filter

Technical Field

The present utility model relates to the field of communications technologies, and in particular, to a coupling adjustment structure and a filter.

Background

The filter is used as a radio frequency device, and can pass the minimum loss of signals in a certain frequency band and inhibit signals in other frequency bands, so that the effect of selecting signals in a required frequency band is achieved.

Some existing filters comprise a cavity, resonant members, a cover plate and a coupling adjusting structure, wherein more than two resonant members are arranged in the cavity, the cavity is provided with an opening, the cover plate covers one end of the cavity with the opening, and the cover plate is provided with a mounting hole. The coupling adjusting structure is arranged in the mounting hole of the cover plate and positioned between the two resonators and is used for adjusting the coupling strength between the two resonators or adjusting the position of the transmission zero point in the passband. However, the existing coupling adjusting structure is complex in structure, more in parts and larger in weight, and is not beneficial to simplifying and light-weight design of the filter.

Disclosure of utility model

The utility model aims to provide a coupling adjusting structure and a filter, and aims to solve the technical problem that the weight of the existing coupling adjusting structure is large.

In a first aspect, the present application provides a coupling adjustment structure, where the coupling adjustment structure includes a connection piece, two coupling pieces, a first mounting piece and a second mounting piece, the coupling pieces have a height direction, a thickness direction and a width direction that are perpendicular to each other, a projection area of the coupling pieces in the thickness direction is greater than a projection area of the coupling pieces in the width direction, the two coupling pieces are disposed in parallel, the coupling pieces have a first end and a second end in the height direction, the first ends of the two coupling pieces are respectively connected with two ends of the connection piece, the first mounting piece and the second mounting piece are connected to the second end, the first mounting piece and the second mounting piece are distributed at intervals along the height direction to form a clamping interval, and the first mounting piece is located above the second mounting piece.

In one embodiment, the coupling piece is in a flat plate shape or is bent around the height direction.

In one embodiment, the coupling adjustment structure further includes a limiting piece, one end of the limiting piece is connected to one of the coupling pieces, the other end of the limiting piece extends toward the other coupling piece, and the limiting piece is located between the two coupling pieces.

In one embodiment, the coupling piece is provided with a first window, one end of the limiting piece is connected to the side wall of the first window, and the other end of the limiting piece is bent towards the other coupling piece.

In one embodiment, a side surface of the first mounting plate adjacent to the second mounting plate extends obliquely downward or horizontally; and/or the second mounting piece extends upwards in an inclined way away from one side surface of the first mounting piece.

In one embodiment, the first mounting tab is a flange connected to the second end; or one end of the first mounting plate is connected to the second end of one coupling plate, and the other end of the first mounting plate extends away from the other coupling plate.

In one embodiment, the second end portion is press bent to form the second mounting tab; or one end of the second mounting piece is connected to the second end of one coupling piece, and the other end of the second mounting piece extends in a direction away from the other coupling piece.

In one embodiment, the first mounting tab and the second mounting tab are attached to each of the second ends.

In one embodiment, the outer sidewall of the second end portion between the first mounting tab and the second mounting tab is a cambered surface.

In one embodiment, the connecting piece is elastically bent around the width direction.

In a second aspect, the present application provides a filter, where the filter includes a cavity, a cover plate, resonant members, and a coupling adjustment structure according to any one of the foregoing embodiments, the number of the resonant members is two or more, the two or more resonant members are mounted in the cavity, the cavity has an opening, the cover plate covers one end of the cavity having the opening, the cover plate has a mounting hole, the coupling adjustment structure rotatably clamps two ends of the mounting hole through the clamping interval, and the coupling piece is located between the two resonant members.

In one embodiment, an outer sidewall of the second end portion between the first mounting piece and the second mounting piece abuts against a wall of the mounting hole.

The coupling adjusting structure and the filter provided by the utility model have the beneficial effects that: the coupling adjusting structure clamps two ends of the mounting hole of the cover plate through the first mounting sheet and the second mounting sheet, namely the first mounting sheet and the second mounting sheet respectively lean against two ends of the mounting hole instead of being fixedly arranged at two ends of the mounting hole in a connecting mode of welding, fastening piece connection, clamping connection or bonding and the like, and protruding points for blocking rotation are not arranged at the end parts of the mounting holes, so that the first mounting sheet and the second mounting sheet can rotate along the circumferential direction of the mounting hole under the driving of external force, and the coupling adjusting structure can be rotatably arranged on the cover plate; the projected area of the coupling piece in the thickness direction is larger than the projected area of the coupling piece in the width direction, so that the opposite areas of the coupling piece and two adjacent resonant pieces are changed in the rotating process of the coupling piece, and the coupling strength between the two resonant pieces is regulated or the position of a transmission zero point in a passband is regulated; the coupling adjusting structure is of a sheet structure, is simple in structure, few in components and greatly reduces weight, solves the technical problems of complex structure and large weight of the existing coupling adjusting structure, and is beneficial to realizing the conciseness and light weight design of the coupling adjusting structure and the filter.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a filter according to the present embodiment;

Fig. 2 is an exploded view of the filter provided in the present embodiment;

FIG. 3 is an assembled schematic view of the first coupling adjustment structure of FIG. 2;

FIG. 4 is a schematic structural view of the first coupling adjustment structure of FIG. 3;

FIG. 5 is an assembled schematic view of the second coupling adjustment structure of FIG. 2;

FIG. 6 is a schematic structural view of the second coupling adjustment structure of FIG. 5;

FIG. 7 is an assembled schematic view of the third coupling adjustment structure of FIG. 2;

fig. 8 is a schematic structural view of the third coupling adjustment structure in fig. 7.

Wherein, each reference sign in the figure:

X, thickness direction; y, width direction; z, height direction;

10. a cavity; 11. an opening;

20. A cover plate; 21. a mounting hole;

30. A resonating member;

40. A coupling adjustment structure; 41. a connecting sheet; 42. a coupling piece; 421. a first end; 422. a second end; 423. a first window; 424. a limiting piece; 43. a first mounting tab; 44. a second mounting plate; 45. clamping the interval.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 and 2, the filter provided by the present application includes a cavity 10, a cover plate 20, a resonator 30 and a coupling adjustment structure 40. The number of the resonant pieces 30 is more than two, the resonant pieces 30 are arranged in the cavity 10, the cavity 10 is provided with an opening 11, the cover plate 20 covers one end of the cavity 10 with the opening 11, the cover plate 20 is provided with a mounting hole 21, and the coupling adjusting structure 40 is rotatably arranged in the mounting hole 21. The coupling adjusting structure 40 is located between the two resonators 30 for adjusting the coupling strength between the two resonators 30 or adjusting the position of the transmission zero point within the passband. The coupling adjusting structure 40 may be rotatably mounted in the mounting hole 21 in an electrically conductive manner to achieve coupling between the two resonant members 30, or may be rotatably mounted in the mounting hole 21 in an insulating manner to achieve capacitive coupling between the two resonant members 30.

Wherein, the mounting hole 21 penetrates the cover plate 20, both ends of the mounting hole 21 in the depth direction (see the height direction Z) are respectively provided with an orifice, and the end of the mounting hole 21 refers to the edge of the orifice and the surrounding surface.

Referring to fig. 3, 5 and 7, the coupling adjusting structure 40 provided by the present application includes a connecting piece 41, two coupling pieces 42, a first mounting piece 43 and a second mounting piece 44. The coupling pieces 42 have a height direction Z, a thickness direction X and a width direction Y perpendicular to each other, a projection area of the coupling pieces 42 in the thickness direction X is larger than a projection area of the coupling pieces 42 in the width direction Y, the coupling pieces 42 have a first end 421 and a second end 422 in the height direction Z, and the first ends 421 of the two coupling pieces 42 are connected to both ends of the connecting piece 41, respectively. The first mounting piece 43 is located above the second mounting piece 44, the first mounting piece 43 and the second mounting piece 44 are connected to the second end 422, the first mounting piece 43 and the second mounting piece 44 are distributed at intervals along the height direction Z to form a clamping interval 45, and the coupling adjusting structure 40 rotatably clamps two ends of the mounting hole 21 through the clamping interval 45, namely, the first mounting piece 43 and the second mounting piece 44 respectively abut against two ends of the mounting hole 21 of the cover plate 20. In this way, the first mounting piece 43 abuts against the end of the mounting hole 21 in the positive direction of the height direction Z, and restricts the negative movement of the coupling adjustment structure 40 in the height direction Z without the action of a pull-down external force; the second mounting piece 44 abuts against the end of the mounting hole 21 in the negative direction of the height direction Z, under the action of no pull-up external force, the positive movement of the coupling adjustment structure 40 along the height direction Z is limited, the coupling adjustment structure 40 is prevented from being separated from the mounting hole 21 in the positive direction and the negative direction of the height direction Z, and the position stability of the coupling adjustment structure 40 in the height direction Z is realized. Because the first mounting piece 43 and the second mounting piece 44 are abutted against two ends of the mounting hole 21, rather than being fixedly mounted on two ends of the mounting hole 21 by adopting a connection mode such as welding, fastening piece connection, clamping connection or bonding, and the like, the end parts of the mounting hole 21 are not provided with protruding points for blocking the rotation of the first mounting piece 43 and the second mounting piece 44, so that the first mounting piece 43 and the second mounting piece 44 can rotate along the circumferential direction of the mounting hole 21 under the driving of external force, and the coupling adjusting structure 40 is rotatably mounted in the mounting hole 21.

The coupling piece 42 is located between the two resonant pieces 30, and a projection area of the coupling piece 42 on a connecting line of the two resonant pieces 30 is a coupling area of the two resonant pieces 30. Since the projected area of the coupling piece 42 in the thickness direction X is larger than the projected area of the coupling piece 42 in the width direction Y, i.e., the projected areas of the coupling piece 42 in different directions are different. When the coupling adjusting structure 40 rotates, the coupling piece 42 rotates along with the rotation, so that the coupling area between the two resonant pieces 30 changes, and the coupling strength between the two resonant pieces 30 is adjusted or the position of a transmission zero point in the passband is adjusted. The coupling adjusting structure 40 is of a sheet structure, has a simple structure, fewer parts and a greatly reduced weight, and is beneficial to realizing the simplification and light-weight design of the coupling adjusting structure 40 and the filter.

The technical scheme of the filter provided by the application is described in detail below.

In some embodiments, in comparison with the conventional coupling adjustment structure in which an operation bump or an operation groove for clamping by the adjustment device is required to be specially provided, the second ends 422 of the two coupling pieces 42 of the coupling adjustment structure 40 provided by the application extend into the mounting hole 21 of the cover plate 20, a space is provided between the two second ends 422, the mounting hole 21 of the cover plate 20 is not sealed, the adjustment device can conveniently enter the space formed between the two second ends 422, and the coupling adjustment structure 40 is pressed and pushed to rotate, so that the adjustment operation of the filter is performed, no additional operation bump or operation groove is required, the coupling adjustment structure 40 is simplified, and the manufacturing difficulty and the manufacturing cost are reduced.

Optionally, after the filter is tuned, a metal film, such as tin foil, is covered on the outer side wall of the cover plate 20, so as to further prevent signal leakage inside the cavity 10.

In some embodiments, with reference to fig. 1 and fig. 2, the plurality of resonant elements 30 are sequentially coupled to form a signal main channel, and the two adjacent resonant elements 30 located on the signal main channel may implement coupling strength adjustment through a coupling adjustment structure 40, or may implement coupling through an air gap, a coupling rib, or the like, that is, the coupling adjustment structure 40 may be disposed between the two adjacent resonant elements 30, or the coupling adjustment structure 40 may not be disposed, which is not limited herein.

For example, referring to fig. 2, ten sequentially coupled resonator elements 30 are installed in the cavity 10, an external radio frequency signal is coupled to a first resonator element 30 and sequentially transmitted to a tenth resonator element 30 to implement filtering, and then transmitted to the outside of the cavity 10 through the tenth resonator element 30, the number of the coupling adjustment structures 40 is nine, the first coupling adjustment structure 40a is located between the first resonator element 30 and the second resonator element 30, the second coupling adjustment structure 40b is located between the second resonator element 30 and the third resonator element 30, the third coupling adjustment structure 40c is located between the third resonator element 30 and the fourth resonator element 30, the fourth coupling adjustment structure 40d is located between the fourth resonator element 30 and the fifth resonator element 30, the fifth coupling adjustment structure 40e is located between the fifth resonator element 30 and the sixth resonator element 30, the sixth coupling adjustment structure 40f is located between the sixth resonator element 30 and the seventh resonator element 30, the seventh coupling adjustment structure 40g is located between the seventh resonator element 30 and the eighth resonator element 30, the eighth coupling adjustment structure 40h is located between the eighth resonator element 30 and the ninth resonator element 30. It will be appreciated that in other embodiments, the coupling adjustment structure 40 may be disposed between two non-adjacent resonators 30 on the signal main channel to form cross coupling, so as to generate a transmission zero in the passband, for example, the coupling adjustment structure 40 is disposed between the second resonator 30 and the fifth resonator 30, and the coupling adjustment structure 40 is disposed between the seventh resonator 30 and the ninth resonator 30, which will not be described herein.

In this embodiment, referring to fig. 3 to 8, the first mounting piece 43 and the second mounting piece 44 are rotatably mounted by clamping two ends of the mounting hole 21 to realize rotatable mounting in the mounting hole 21 instead of threaded connection, that is, the mounting hole 21 does not need tapping holes, so that the processing difficulty and the precision requirements of the cover plate 20 can be effectively simplified, the processing cost of the cover plate 20 can be effectively reduced, and the processing efficiency of the cover plate 20 can be effectively improved. In addition, when the coupling adjusting structure 40 of the present embodiment rotates relative to the mounting hole 21, the risk of scraping the hole wall of the mounting hole 21 and generating burrs, chips and the like to fall into the cavity 10 can be reduced or even substantially avoided, so that intermodulation and power performance of the filter can be effectively ensured and improved.

In some embodiments, referring to fig. 3, 5 and 7, the outer side wall of the second end 422 between the first mounting piece 43 and the second mounting piece 44 is abutted against the hole wall of the mounting hole 21, so that on one hand, the limit of the second end 422 in the radial direction of the mounting hole 21 is realized, the coupling adjustment structure 40 is prevented from moving radially along the mounting hole 21, the mounting stability and the position stability can be ensured, the product index is prevented from being changed due to the movement, and on the other hand, the contact area and the supporting force between the second end 422 and the mounting hole 21 are enhanced, so that the coupling adjustment structure 40 is stably and rotatably mounted in the mounting hole 21.

Optionally, the hole wall of the mounting hole 21 is a convoluted surface, such as a cylindrical inner wall, a conical inner wall, a truncated cone-shaped inner wall, a stepped inner wall, and the like, and the outer side wall of the second end 422 between the first mounting piece 43 and the second mounting piece 44 is an arc surface, and the arc surface is attached to the hole wall of the mounting hole 21, so as to maximize the abutting area, further enhance the rotation stability of the coupling adjustment structure 40, reduce the friction between the second end 422 and the hole wall of the mounting hole 21, and further improve the rotation smoothness of the coupling adjustment structure 40.

Optionally, the wall of the mounting hole 21 is an irregular circular wall, such as an elliptical wall, a polygonal wall or an irregular wall, and the outer side wall of the second end 422 between the first mounting piece 43 and the second mounting piece 44 is a non-cambered surface, and the outer side wall of the second end 422 is in line contact or point contact with the wall of the mounting hole 21, so that the limit of the second end 422 in the radial direction of the mounting hole 21 is also realized, the coupling adjustment structure 40 is prevented from moving along the radial direction of the mounting hole 21, and the wall of the mounting hole 21 provides a supporting force to the second end 422, so that the coupling adjustment structure 40 is stably rotatably mounted in the mounting hole 21.

Alternatively, the wall of the mounting hole 21 is an irregular circular wall, such as an elliptical wall, a polygonal wall, or an irregular wall, and the outer side wall of the second end 422 between the first mounting piece 43 and the second mounting piece 44 is an arc surface, so long as the coupling adjustment structure 40 is rotatably mounted in the mounting hole 21; alternatively, the hole wall of the mounting hole 21 may be a convoluted surface, such as a cylindrical inner wall, a conical inner wall, a truncated cone-shaped inner wall, a stepped inner wall, or the like, and the outer side wall of the second end 422 located between the first mounting piece 43 and the second mounting piece 44 may be an arc surface, so long as the coupling adjustment structure 40 is rotatably mounted in the mounting hole 21.

It will be appreciated that in other embodiments, a gap is provided between the outer side wall of the second end 422 located between the first mounting piece 43 and the second mounting piece 44 and the wall of the mounting hole 21, and when the coupling adjustment structure 40 is mounted in the mounting hole 21, the outer side wall of the second end 422 is not in contact with the wall of the mounting hole 21, and the second end 422 is rotatably supported at both ends of the mounting hole 21 by the first mounting piece 43 and the second mounting piece 44, so that the rotation of the coupling adjustment structure 40 is not affected.

In some embodiments, referring to fig. 3, 5 and 7, the first mounting piece 43 and the second mounting piece 44 abut against two ends of the mounting hole 21 in the height direction Z, and the second end 422 between the first mounting piece 43 and the second mounting piece 44 is attached to the hole wall of the mounting hole 21, so that the supporting area of the cover plate 20 on the coupling adjustment structure 40 is increased, and the mounting stability and the rotation stability of the coupling adjustment structure 40 are improved.

Specifically, the mounting hole 21 is a light hole, the outer side wall of the second end 422 between the first mounting piece 43 and the second mounting piece 44 is an arc surface, and the arc surface is attached to the smooth hole wall of the mounting hole 21, so that on one hand, radial movement of the coupling adjustment structure 40 along the mounting hole 21 is prevented, and on the other hand, mounting stability and position stability can be ensured, and on the other hand, friction between the second end 422 and the hole wall of the mounting hole 21 is greatly reduced, and further, rotation resistance of the coupling adjustment structure 40 is reduced. Alternatively, the inner wall of the mounting hole 21 is a convolute surface, such as a cylindrical inner wall, a conical inner wall, a truncated cone-shaped inner wall, a stepped inner wall, or the like, to improve the smoothness of rotation.

In other embodiments, referring to fig. 3, 5 and 7, the first mounting piece 43 and the second mounting piece 44 abut against both ends of the mounting hole 21 in the height direction Z, and the second end 422 between the first mounting piece 43 and the second mounting piece 44 is spaced from the wall of the mounting hole 21. Thus, the mounting hole 21 may be a smooth hole or may have a certain roughness, which is not limited herein, and does not affect the rotation performance of the connecting piece 41, thereby reducing the processing requirement and processing difficulty of the mounting hole 21.

Specifically, the inner wall of the mounting hole 21 may be a convolute surface, such as a cylindrical inner wall, a conical inner wall, a truncated cone-shaped inner wall, a stepped inner wall, etc., so that the contact length and the clamping area between the first mounting piece 43 and the second mounting piece 44 and the end surface of the mounting hole 21 are kept consistent during rotation, and the stress is stable; the inner wall of the mounting hole 21 may be a non-convoluted surface, such as a hexagonal cross section, an elliptical cross section, or an irregular cross section, that is, the radius of the mounting hole 21 in different radial directions may be different, the clamping area between the first mounting piece 43 and the second mounting piece 44 and the end surface of the mounting hole 21 is large when the first mounting piece 43 and the second mounting piece 44 rotate to the position where the radius of the mounting hole 21 is short, the clamping area between the first mounting piece 43 and the second mounting piece 44 and the end surface of the mounting hole 21 is small when the first mounting piece 43 and the second mounting piece 44 rotate to the position where the radius of the mounting hole 21 is long, the coupling adjusting structure 40 may still be rotatably mounted in the mounting hole 21, and the shape and size requirements and the machining precision requirements of the mounting hole 21 are further reduced.

In some embodiments, referring to fig. 3 to 8, the height of the clamping space 45 formed by the first mounting piece 43 and the second mounting piece 44 is 90% -110% of the length of the mounting hole 21, so that the first mounting piece 43 and the second mounting piece 44 can clamp, just clamp or interference clamp two ends of the mounting hole 21, which ensures that the coupling adjustment structure 40 is stably mounted in the mounting hole 21, and reduces the space requirement precision of the first mounting piece 43 and the second mounting piece 44.

The length of the mounting hole 21 refers to the dimension distance of the mounting hole 21 in the height direction Z, that is, the distance from the upper orifice of the mounting hole 21 to the lower orifice of the mounting hole 21.

In an embodiment, referring to fig. 4 and fig. 6, the first mounting piece 43 and the second mounting piece 44 that form the clamping space 45 are used for being in interference clamping fit with two ends of the mounting hole 21, and the height of the clamping space 45 is smaller than the length of the mounting hole 21, so that after the first mounting piece 43 and the second mounting piece 44 abut against the upper end and the lower end of the mounting hole 21, the first mounting piece 43 and the second mounting piece 44 can be elastically deformed, so that two ends of the mounting hole 21 can be more reliably and tightly clamped, the mounting stability of the connecting piece 41 at the mounting hole 21 can be improved, the position stability of the coupling adjusting structure 40 can be further improved, and the index of the filter after debugging can be avoided from being greatly changed as much as possible.

In some embodiments, referring to fig. 3, fig. 5 and fig. 7, a first chamfer is disposed at an end of the mounting hole 21 away from the cavity 10, so as to enlarge an orifice of the mounting hole 21, and to accommodate the first mounting piece 43, so that the coupling adjustment structure 40 is flush with or lower than an outer side surface of the cover plate 20, which can ensure that products such as a filter are concise and attractive on one side of the cover plate 20, and can substantially avoid impacting other structures to affect product indexes when the products such as the filter are assembled with other structures, so that the overall height of the products such as the filter can be reduced, the miniaturization and the light weight of the products such as the filter can be facilitated, the settable volume of the products such as the filter can be enlarged on the premise that the installation space reserved for the products such as the filter is unchanged, and the performance indexes of the products such as the filter are improved. Meanwhile, the abutting area of the first mounting piece 43 and the end part of the mounting hole 21 can be increased by the design of the second chamfer, so that the position stability of the coupling adjusting structure 40 can be improved.

In some embodiments, referring to fig. 3, 5 and 7, the end of the mounting hole 21 near the cavity 10 is provided with a second chamfer, so as to enlarge the orifice of the mounting hole 21 for accommodating the second mounting piece 44, so that the second mounting piece 44 does not protrude from the inner side surface of the cover plate 20, and occupation of the inner space of the cavity 10 by the second mounting piece 44 is reduced. Meanwhile, the design of the second chamfer can increase the contact area between the second mounting piece 44 and the end part of the mounting hole 21, which is beneficial to improving the position stability of the coupling adjusting structure 40.

The following describes in detail the technical solution of the coupling adjustment structure 40 provided by the present application.

In this embodiment, at least one of the first mounting pieces 43 and at least one of the second mounting pieces 44 may have the same number of the first mounting pieces 43 and the second mounting pieces 44, or may have different numbers of the first mounting pieces 43 and the second mounting pieces 44 located at the second end 422 of the same coupling piece 42, or may be located at the second ends 422 of two coupling pieces 42, respectively, which is not limited herein.

For example, the first mounting pieces 43 are located at the second end 422 of one of the coupling pieces 42, the number of the first mounting pieces 43 may be one, two or more than two, the second mounting pieces 44 are located at the second end 422 of the other coupling piece 42, and the number of the second mounting pieces 44 may be one, two or more than two, so that the two coupling pieces 42 distributed at intervals respectively abut against the end of the mounting hole 21 through the first mounting pieces 43 and the second mounting pieces 44, so that the two coupling pieces 42 are stably supported in the thickness direction X, and the coupling pieces 42 are further stably maintained in the rotating process. In addition, the first mounting piece 43 and the second mounting piece 44 are respectively located at different second end portions 422, so that the operation space of the first mounting piece 43 and the second mounting piece 44 when the first mounting piece 43 and the second mounting piece 44 are respectively connected in a split mode or integrally formed is increased, the operation process is simplified, meanwhile, as the second end portion 422 of one coupling piece 42 is only provided with the first mounting piece 43 or the second mounting piece 44, namely, the position of one coupling piece 42 in the positive direction or the negative direction in the height direction Z is limited, when the coupling adjusting structure 40 is assembled and disassembled, only the second end portion 422 of one coupling piece 42 is required to be elastically bent, the unidirectional restriction in the height direction Z received by the second end portion 422 of the second coupling piece 42 is removed, and the second end portions 422 of the two coupling pieces 42 can be conveniently and simply disassembled through the mounting hole 21 without being elastically bent.

For example, the first mounting piece 43 and the second mounting piece 44 are both connected to the second end 422 of the same coupling piece 42, the second end 422 of the other coupling piece 42 abuts against the hole wall of the mounting hole 21, and the first mounting piece 43 and the second mounting piece 44 are not connected, so that the connection operation is not required, and the processing amount is reduced. During assembly, an operator only needs to assemble the first mounting piece 43 and the second mounting piece 44 connected to the same second end 422 to two ends of the mounting hole 21, and the outer wall of the second end 422 of the other coupling piece 42 abuts against the hole wall of the mounting hole 21, so that clamping operation with the mounting hole 21 is not needed, and assembly operation is simplified.

For example, the second end 422 of one of the coupling pieces 42 is connected with the first mounting pieces 43 and the second mounting pieces 44 which are distributed at intervals along the height direction Z, so that the second end 422 is stably positioned and clamped at two ends of the mounting hole 21 in the height direction Z, the coupling adjusting structure 40 is ensured to be stably assembled in the mounting hole 21, the second end 422 of the other coupling piece 42 is connected with the first mounting piece 43 or the second mounting piece 44, the supporting force between the second end 422 and the end of the mounting hole 21 can be increased, and only the unidirectional limiting is performed in the positive direction or the negative direction in the height direction Z, so that the assembly and disassembly operations of the second end 422 are facilitated.

For another example, the second end portions 422 of the two coupling pieces 42 are connected with the first mounting pieces 43 and the second mounting pieces 44 which are distributed at intervals along the height direction Z, so that the two second end portions 422 are stably positioned in the height direction Z and stably clamped at two ends of the mounting hole 21, the coupling adjusting structure 40 is further ensured to be stably assembled in the mounting hole 21, and the coupling adjusting structure 40 is prevented from loosening and falling.

In some embodiments, referring to fig. 4, 6 and 8, the first mounting piece 43 and the second mounting piece 44 are located on the same vertical line, that is, the projections of the two in the height direction Z overlap, and the two are opposite to the two ends of the clamping mounting hole 21 from top to bottom, so as to reduce loosening or displacement generated under vibration or stress.

In other embodiments, the first mounting piece 43 and the second mounting piece 44 are located on different vertical lines, that is, the projections of the first mounting piece 43 and the second mounting piece 44 in the height direction Z are not overlapped in different radial directions of the mounting hole 21, so that the abutting position of the coupling adjustment structure 40 with the end part of the mounting hole 21 in the circumferential direction of the mounting hole 21 is increased, and the stability of the coupling adjustment structure 40 in the circumferential direction is improved.

In one embodiment, referring to fig. 3 and 5, the top of the two second ends 422 are provided with the first mounting pieces 43, and the tops of the two first mounting pieces 43 are flush, so that the two first mounting pieces 43 can bear the externally applied pressing force at the same time during assembly, so that the coupling adjustment structure 40 is more uniformly stressed during press assembly, and the coupling adjustment structure 40 of the sheet structure is prevented from being damaged or the coupling adjustment structure 40 is prevented from being bent and unstable during assembly.

In some embodiments, referring to fig. 7 and 8, the coupling adjustment structure 40 further includes a limiting piece 424, one end of the limiting piece 424 is connected to one of the coupling pieces 42, and the other end of the limiting piece 424 extends toward the other coupling piece 42, and the limiting piece 424 is located between the two coupling pieces 42. When the two coupling pieces 42 are folded, the limiting piece 424 abuts against the other coupling piece 42 to limit the coupling piece 42 to be folded continuously, so that the shape and the structure stability of the coupling adjusting structure 40 are ensured, and the plastic deformation or the breakage of the connecting piece 41 caused by the excessive folding of the two coupling pieces 42 is avoided.

Specifically, when the coupling adjustment structure 40 needs to be disassembled, the two coupling pieces 42 are clamped together until the limiting piece 424 abuts against the other coupling piece 42, which means that the first mounting piece 43 and the second mounting piece 44 are separated from the mounting hole 21, so that the coupling adjustment structure 40 can be conveniently taken out from the mounting hole 21.

In one embodiment, referring to fig. 8, the coupling piece 42 has a first window 423, one end of the limiting piece 424 is connected to a side wall of the first window 423, and the other end of the limiting piece 424 is bent towards the other coupling piece 42. The first window 423 reduces the rigidity of the coupling piece 42, and facilitates the bending deformation of the coupling piece 42, so that the first mounting piece 43 and the second mounting piece 44 can clamp the mounting hole 21 or separate from the mounting hole 21, and the weight of the coupling piece 42 is reduced, thereby facilitating the lightweight design of the coupling adjustment structure 40.

Optionally, each coupling piece 42 is provided with a first window 423, and the limiting pieces 424 connected to each first window 423 are disposed opposite to each other, and when the two coupling pieces 42 are folded, the two limiting pieces 424 abut against each other to limit the coupling pieces 42 from being folded continuously.

Optionally, the spreading area of the limiting piece 424 is smaller than the area of the first window 423, so that the limiting piece 424 is bent and formed integrally on the first window 423, and the processing technology of the limiting piece 424 is simplified.

And, the coupling piece 42 is through setting up first window 423 for spacing piece 424 can be in the coupling piece 42 of coupling regulation structure 40 by integrated into one piece stamping forming, namely, the first mounting piece 43 of coupling regulation structure 40, second mounting piece 44, connection piece 41, coupling piece 42, spacing piece 424 are based on a slice substrate integrated into one piece, and the whole uniformity of coupling regulation structure 40 is better, does benefit to the manufacturing of simplifying coupling regulation structure 40, does benefit to coupling regulation structure 40 and realizes light-weighted, succinct.

The limiting piece 44 may be located on any side wall of the first window 423, which is not limited herein.

For example, referring to fig. 8, the limiting piece 44 is formed on the upper side wall of the first window 423 in the height direction Z by punching, and in the first aspect, since the height dimension of the coupling piece 42 is greater than the width dimension of the coupling piece 42, the length dimension of the limiting piece 44 located on the upper side wall is greater, and the end of the limiting piece 44 can be deformed greatly in a labor-saving manner during punching and be bent towards the direction of the other coupling piece 42, so that the difficulty in integrally forming the limiting piece 44 is reduced; in the second aspect, the limiting piece 44 is located on the upper side wall of the first window 423, when the two coupling pieces 42 are folded, the limiting piece 44 abuts against the second end 422 of the other coupling piece 42, and the first end 421 of the coupling piece 42 and the connecting piece 41 are integrally formed, so that the first end 421 and the second end 422 of the coupling piece 42 in the height direction Z are both limited, and the limiting effect is better; in the third aspect, the stamping bending is beneficial to improving the structural strength, the first end 421 of the coupling piece 42 and the connecting piece 41 are integrally stamped and formed, and the second end 422 of the coupling piece 42 is integrally stamped and formed to form the limiting piece 44, so that the strength and the weight of the coupling adjusting structure 40 in the height direction Z are uniformly distributed.

For example, when the limiting piece 44 is formed on the lower side wall of the first window 423 in the height direction Z in a punching manner, the length of the limiting piece 44 positioned on the lower side wall can be designed to be larger, and the tail end of the limiting piece can be deformed greatly in a labor-saving manner during punching so as to bend towards the other coupling piece 42, so that the difficulty in integrally forming the limiting piece 44 is reduced; when the first end 421 of the coupling piece 42 is pressed to close the two coupling pieces 42, the limiting piece 44 located on the lower side wall of the first window 423 is close to the first end 421, the limiting piece 44 is close to the point of application of the pressing force, and the moment arm between the limiting piece 44 and the pressing point is small, so that the pressing force is better counteracted, and the coupling adjusting structure 40 is better protected.

For example, when the limiting piece 44 is formed on the left side wall or the right side wall of the first window 423 in the width direction Y by punching, the size of the limiting piece 44 in the height direction Z is larger, and the limiting piece 44 is used for being in limiting abutment with the other coupling piece 42, so that the limiting contact area is large, the limiting effect is better, the strength of the limiting piece 44 is better, and the coupling adjusting structure 40 can be better protected by bearing larger pressing force.

It will be appreciated that in other embodiments, the limiting piece 424 may be separately connected to the side wall of the coupling piece 42 or the side wall of the first window 423, for example, but not limited to, by using a separate connection method such as bonding, welding, screw fastening, clamping, crimping, plugging, sleeving, interference fit, etc., which is not limited herein.

In some embodiments, a side surface of the first mounting piece 43 adjacent to the second mounting piece 44 extends obliquely downward or horizontally as viewed in the forward direction of the height direction Z. Wherein, when the surface of the first mounting piece 43 near the second mounting piece 44 has a plane, the included angle between the plane and the side wall of the second end 422 is greater than or equal to 90 °. Or when the surface of the first mounting piece 43, which is close to the second mounting piece 44, is an arc surface, an included angle between the tangent plane of the arc surface and the side wall of the second end 422 is greater than or equal to 90 °. In this way, when the coupling adjustment structure 40 is assembled into the mounting hole 21 of the cover plate 20 from top to bottom along the height direction Z, the side surface of the first mounting piece 43, which is close to the second mounting piece 44, abuts against the orifice end surface of the mounting hole 21, so that the coupling adjustment structure 40 is limited to move down continuously under the action of external force, the mounting position of the coupling adjustment structure 40 is limited, and meanwhile, the coupling adjustment structure 40 can be prevented from being separated from the mounting hole 21 from top to bottom in the use process, so that the position stability of the coupling adjustment structure 40 is improved.

It will be appreciated that in other embodiments, as seen in the forward direction of the height direction Z in conjunction with fig. 3 and 5, the surface of the first mounting plate 43 adjacent to the second mounting plate 44 is inclined upward, which facilitates pulling the coupling adjustment structure 40 from top to bottom during loading and unloading, so that the coupling adjustment structure 40 moves downward and is separated from the mounting hole 21, and the limiting relationship between the first mounting plate 43 and the mounting hole 21 is not required to be released by bending around the width direction Y, thereby simplifying the dismounting operation. Meanwhile, the first mounting piece 43 is arranged upwards near one side surface of the second mounting piece 44 in an inclined manner, the inclined plane can be matched with the aperture diameter of the upper side of the mounting hole 21 in a certain range, the processing precision requirement of the mounting hole 21 is reduced, chamfering can be omitted at the aperture position of the upper side of the mounting hole 21, and the processing procedure and processing cost of the mounting hole 21 are reduced.

In some embodiments, as viewed in the forward direction of the height direction Z in conjunction with fig. 3, 5 and 7, the second mounting piece 44 extends obliquely upward away from one side surface of the first mounting piece 43. When the coupling adjusting structure 40 is assembled into the mounting hole 21 of the cover plate 20 from top to bottom along the height direction Z, a guide surface is formed on one side surface of the second mounting piece 44 away from the first mounting piece 43, and the guide surface contacts with the upper hole end surface of the mounting hole 21 first, so that the downward movement resistance of the second mounting piece 44 relative to the mounting hole 21 is reduced, and the assembly operation of the coupling adjusting structure 40 is facilitated.

In this embodiment, a surface of the second mounting piece 44 away from the first mounting piece 43 may be an inclined plane or an arc surface.

It will be appreciated that in other embodiments, the second mounting tab 44 extends obliquely downward or horizontally away from a side surface of the first mounting tab 43 as viewed in the forward direction of the height direction Z. At this time, by providing a chamfer at the upper end portion of the mounting hole 21, the second mounting piece 44 is guided to elastically shrink into the mounting hole 21; or the coupling adjusting structure 40 is clamped by the clamp to be folded and contracted, when the second mounting piece 44 reaches the lower end part of the mounting hole 21 and the first mounting piece 43 reaches the upper end part of the mounting hole 21, the clamp is taken off again, so that the first mounting piece 43 and the second mounting piece 44 clamp the two ends of the mounting hole 21, and the assembly is completed.

In some embodiments, the side of the first mounting piece 43 facing away from the second mounting piece 44 is a plane, which is subjected to an externally applied pressing force during assembly, and the bearing area is large, so that the coupling adjustment structure 40 is more uniformly stressed during press assembly, and the coupling adjustment structure 40 of the sheet structure is prevented from being damaged or the coupling adjustment structure 40 is prevented from being bent and unstable during assembly.

In some embodiments, as seen in the forward direction of the height direction Z in conjunction with fig. 3 and 5, the surface of the side of the second mounting piece 44, which is close to the first mounting piece 43, is gradually inclined downward, which is beneficial to the detachment of the coupling adjustment structure 40 from the mounting hole 21 under the action of the external force pulling up, so that the detachment operation is simplified, and the first mounting piece 43 and the second mounting piece 44 are not required to be separated from the end of the mounting hole 21 along the thickness direction X by tightly pressing and folding the two coupling pieces 42, so that the coupling adjustment structure 40 is prevented from being deformed or broken due to the plastic deformation caused by the pressing of the two coupling pieces 42.

Meanwhile, the surface of one side of the second mounting piece 44, which is close to the first mounting piece 43, gradually inclines downwards, the inclined plane can be matched with the aperture diameter of the lower side of the mounting hole 21 in a certain range, the processing precision requirement of the mounting hole 21 is reduced, chamfering can be omitted at the aperture position of the lower side of the mounting hole 21, and the processing procedure and processing cost of the mounting hole 21 are reduced.

Alternatively, a side surface of the second mounting piece 44 adjacent to the first mounting piece 43 may be an inclined plane or an arc surface.

In this embodiment, the first mounting piece 43 and the second mounting piece 44 may be integrally formed with the second end 422 to improve connection stability and assembly consistency, or may be separately connected, for example, but not limited to, a split connection manner such as bonding, welding, screw fastening, clamping, crimping, plugging, sleeving, interference fit, etc., which is not limited herein.

In one embodiment, referring to fig. 4, 6 and 8, the first mounting tab 43 is a flange that is attached to the second end 422. Thus, by press bending the distal end of the second end 422, the first mounting piece 43 is integrally formed, the first mounting piece 43 can be quickly processed by the press process, and the first mounting piece 43 extends in the width direction Y, so that the holding area with the end of the mounting hole 21 can be increased, and the holding force can be improved.

In another embodiment, one end of the first mounting tab 43 is connected to the second end 422 of one of the coupling tabs 42, and the other end of the first mounting tab 43 extends away from the other coupling tab 42 such that the first mounting tab 43 projects outwardly and abuts the end of the mounting hole 21.

Specifically, the first mounting piece 43 is integrally bent and formed at the second end 422. The bending molding can increase the elasticity of the first mounting piece 43, so that the first mounting piece 43 can be pressed to generate deflection deformation in a direction away from the second mounting piece 44, and the distance of the clamping interval 45 is increased. Based on this, even if there is a machining tolerance in the first mounting piece 43 and/or the mounting hole 21, when the first mounting piece 43 is assembled to the mounting hole 21, the first mounting piece 43 is fitted to the upper end portion of the mounting hole 21 by self-adaptive elastic deformation, thereby absorbing the machining tolerance and achieving a tight fit, and further ensuring and improving the stability of the axial position and the state of the coupling adjustment structure 40 after being mounted to the mounting hole 21.

Optionally, the second end 422 has a second window, and one end of the first mounting piece 43 is connected to a side portion of the second window, and the other end is bent outwards. The arrangement of the second window can realize that the first mounting piece 43 is integrally bent and formed on the side wall of the second end 422, and simultaneously, the rigidity and the weight of the second end 422 are reduced, and the stamping and the molding of the second end 422 are facilitated.

Optionally, one end of the first mounting piece 43 is connected to the top surface of the second end 422, the other end is bent outwards to form, that is, the first mounting piece 43 is higher than the second end 422, and the first mounting piece 43 abuts against the upper end of the mounting hole 21, so that the first mounting piece 43 is flush with the upper end of the mounting hole 21, the second end 422 below the first mounting piece 43 is not higher than the upper end surface of the mounting hole 21, which can ensure that products such as a filter are concise and attractive on one side of the cover plate 20, can avoid impacting other structures to influence product indexes when the products such as the filter are assembled with other structures, and can reduce the overall height of the products such as the filter.

In one embodiment, referring to fig. 4, fig. 6 and fig. 8, the second end 422 is punched and bent to form the second mounting piece 44, so that the second mounting piece 44 and the coupling piece 42 are integrally formed, the second mounting piece 44 is formed by rapid punching, and the complex operation and long time consumption during the split connection of the second mounting piece 44 are avoided.

In another embodiment, one end of the second mounting tab 44 is connected to the second end 422 of the coupling tab 42, and the other end of the second mounting tab 44 extends away from the other coupling tab 42 such that the second mounting tab 44 protrudes outward and can abut the end of the mounting hole 21.

Specifically, the second mounting piece 44 is integrally bent and formed at the second end 422. The bending molding can increase the elasticity of the second mounting piece 44, so that the second mounting piece 44 can be pressed to generate deflection deformation in a direction away from the first mounting piece 43, and the distance of the clamping interval 45 is increased. Based on this, even if there is a machining tolerance in the second mounting piece 44 and/or the mounting hole 21, when the second mounting piece 44 is assembled to the mounting hole 21, the second mounting piece 44 is fitted to the lower end portion of the mounting hole 21 by self-adaptive elastic deformation, thereby absorbing the machining tolerance and realizing a tight fit, and further ensuring and improving the stability of the axial position and the state of the coupling adjustment structure 40 after being mounted to the mounting hole 21.

Optionally, the second end 422 has a third window, and one end of the second mounting piece 44 is connected to a side portion of the third window, and the other end is bent outward. Or the second end 422 does not have a third window, one end of the second mounting piece 44 is connected to the edge of the second end 422, and the other end is bent outwards.

In some embodiments, referring to fig. 4, fig. 6 and fig. 8, the connecting piece 41 is elastically bent around the width direction Y, and the connecting piece 41 is elastically bent and then rebounded, so that the two coupling pieces 42 connected to two ends of the connecting piece 41 are driven to be away from each other, and the first mounting piece 43 and the second mounting piece 44 are further pressed against the mounting hole 21 along the radial direction of the mounting hole 21, so that the coupling adjustment structure 40 is locked in the radial direction, and the stability of the radial position of the coupling adjustment structure is improved.

In addition, compared with the connection piece 41 which is not elastically bent, for example, the connection piece 41 is a flat piece, the elastically bent connection piece 41 provided in the embodiment can enhance the deformability of the coupling adjustment structure 40, that is, under the action of external force, the two coupling pieces 42 can be folded more labor-effectively, and the assembly and disassembly efficiency is improved. For example, by closing the two coupling pieces 42 by pressing at the time of attachment and detachment, the interval between the two coupling pieces 42 is shortened so that the first mounting piece 43 and the second mounting piece 44 are separated from the end portions of the mounting hole 21, and the coupling adjusting structure 40 can freely pass through the mounting hole 21.

In this embodiment, the coupling piece 42 may be integrally formed with the connecting piece 41 to improve connection stability and assembly consistency, or may be separately connected, for example, but not limited to, a separate connection manner such as bonding, welding, screw fastening, clamping, crimping, plugging, sleeving, interference fit, etc., which is not limited herein.

For example, the middle part of the strip-shaped sheet-shaped plate is bent around the width direction Y, so that two ends of the strip-shaped sheet-shaped plate are parallel to each other, the middle bent part forms the connecting sheet 41, the other parts form the two coupling sheets 42, and only the stamping bending process is needed to realize the integral forming of the coupling sheets 42 and the connecting sheet 41, so that the processing convenience, the structural strength, the structural consistency and the assembly convenience of the coupling adjusting structure 40 are improved, and the consistency and the assembly convenience of the filter can be ensured and improved.

In some embodiments, referring to fig. 6, the coupling piece 42 is in a flat plate shape, the coupling piece 42 is parallel to the height direction Z, the coupling piece 42 can be directly punched from a sheet body, and bending operation is not required, so that the processing procedure of the coupling piece 42 is simplified. Meanwhile, the projection area of the coupling piece 42 of the flat plate structure in the thickness direction X is the largest, and the projection area in the width direction Y is the smallest, so that the coupling area range between the two resonant pieces 30 is adjusted to be enlarged and the debugging range of the coupling adjusting structure 40 is enlarged in the rotation process of the coupling piece 42.

In another possible embodiment, in connection with fig. 8, the coupling tab 42 is arranged curved about the height direction Z. The middle part of the coupling piece 42 in the width direction Y is punched and bent, namely, the coupling piece 42 is in an arc plate shape at this moment, so that the projection area of the coupling piece 42 bent in the thickness direction X is smaller than the projection area of the plate-shaped coupling piece 42, the projection area in the width direction Y is larger than the projection area of the plate-shaped coupling piece 42, namely, in the 360-degree rotation process, the variation range of the coupling area is reduced, the coupling area adjusted by each rotation angle is more accurate, the debugging accuracy of the coupling area and the coupling strength can be improved, and the coupling piece is suitable for filter products sensitive to the coupling area.

In some embodiments, referring to fig. 4, fig. 6 and fig. 7, the outer sidewall of the second end 422 between the first mounting piece 43 and the second mounting piece 44 is an arc surface, which is beneficial to the lamination of the arc surface and the hole wall of the mounting hole 21, so that on one hand, the limit of the second end 422 in the radial direction of the mounting hole 21 is realized, the radial play of the coupling adjustment structure 40 along the mounting hole 21 is prevented, the mounting stability and the position stability can be ensured, the product index is prevented from being changed due to play, on the other hand, the contact area and the supporting force between the second end 422 and the mounting hole 21 are enhanced, the coupling adjustment structure 40 is beneficial to being stably and rotatably mounted in the mounting hole 21, and on the other hand, the arc surface can reduce the resistance of the coupling adjustment structure 40 in the rotation process, and the coupling adjustment structure 40 is beneficial to the rotation adjustment.

It will be appreciated that in other embodiments, the outer side wall of the second end 422 between the first mounting piece 43 and the second mounting piece 44 is a plane, and when the coupling adjustment structure 40 is mounted in the mounting hole 21, the plane may not contact with the wall of the mounting hole 21, so as not to affect the rotation of the coupling adjustment structure 40, or both edges of the plane in the width direction Y contact with the wall of the mounting hole 21, so as to improve the rotation supporting force, and also prevent the coupling adjustment structure 40 from moving in the radial direction, and ensure that the coupling adjustment structure 40 rotates stably.

In addition, because the coupling piece 42 is arc platy, then the lateral wall of the second tip 422 that is located between first mounting piece 43 and the second mounting piece 44 is the cambered surface, do benefit to the pore wall laminating with mounting hole 21, realize on the one hand that second tip 422 is spacing in the radial of mounting hole 21, prevent the radial drunkenness of coupling adjustment structure 40 along mounting hole 21, can guarantee installation stability and position stability, avoid the product index to change because of the drunkenness, on the other hand strengthen area of contact and holding power between second tip 422 and the mounting hole 21, do benefit to coupling adjustment structure 40 and rotationally install in mounting hole 21 steadily. And, when the embryonic metal sheet that the connection piece 41 and two coupling pieces 42 are connected is the flat piece of whole, directly press bending to the embryonic metal sheet around direction of height Z, can once only press processing out that the coupling piece 42 is crooked around direction of height Z, be located the outer lateral wall of second tip 422 between first mounting piece 43 and the second mounting piece 44 and be the cambered surface, then crooked connection piece 41 finally forms the coupling adjustment structure 40 of U type, has simplified the punching procedure, has improved production efficiency.

In this embodiment, the coupling piece 42 may be made of a metal material, or may include an insulating sheet body and a metal layer disposed on a surface of the insulating sheet body, and the material of the coupling piece 42 is not limited in the present application.

In one embodiment, the coupling tab 42 is made of sheet metal. Because the thermal expansion coefficient of the metal is far smaller than that of the plastic, compared with a plastic sheet body, the metal sheet body has small dimensional change when the temperature is changed, can better keep stable positions in high and low temperature environments, avoids the position change of the coupling piece 42 as much as possible, further avoids jump of out-of-band rejection indexes of the filter as much as possible, and ensures the stability of the out-of-band rejection indexes of the filter.

Specifically, the coupling adjustment structure 40 is integrally formed, that is, the connection piece 41, the two coupling pieces 42, the first mounting piece 43, and the second mounting piece 44 are integrally formed. Optionally, the connecting piece 41, the two coupling pieces 42, the first mounting piece 43 and the second mounting piece 44 are of a unitary metal sheet structure. The coupling adjusting structure 40 can be integrally formed through a stamping process, a casting process or an additive manufacturing process, so that rapid continuous automatic production can be realized, the production efficiency is improved, and the production cost is saved; the coupling adjustment structure 40 may also be integrally formed by machining.

In another embodiment, the coupling piece 42 includes a first plastic sheet and a first metal layer disposed on a surface of the first plastic sheet, and the first mounting piece 43, the second mounting piece 44, the connecting piece 41 and the first plastic sheet are integrally injection molded, so that the consistency of assembly positions among the first mounting piece 43, the second mounting piece 44, the connecting piece 41 and the first plastic sheet is guaranteed to be high, the connection strength is high, the stability of product indexes is improved, the size and the weight of the coupling adjustment structure 40 are reduced, and the miniaturization and the weight of the filter are facilitated. Compared with the metal material, the first mounting sheet 43, the second mounting sheet 44, the connecting sheet 41 and the first plastic sheet have good plasticity, can be flexibly manufactured by adopting a hot working mode or a mechanical working mode, namely, can be manufactured into the coupling adjusting structures 40 with various shapes by adopting processing methods such as injection molding, extrusion, blow molding and the like, and can be manufactured into the coupling adjusting structures 40 with various shapes by adopting mechanical working methods such as cutting, stamping, bending and the like.

Specifically, the first mounting piece 43 and the second mounting piece 44 may only include plastic materials, and no metal outer layer is required, so that the first mounting piece 43 and the second mounting piece 44 are installed in the mounting hole 21 in an insulating manner, and the adjacent two resonant pieces 30 are coupled in a capacitive manner. Of course, the first mounting piece 43 and the second mounting piece 44 may further include a second plastic sheet and a second metal layer disposed on a surface of the second plastic sheet, so as to implement inductive coupling between two adjacent resonant pieces 30.

Specifically, the first plastic sheet body does not affect the coupling area between the two resonant pieces 30, and specific requirements are not made on the shape and the size of the first plastic sheet body, so that the processing requirements and the processing difficulty of the first plastic sheet body are reduced. The first plastic sheet body is of a plate-shaped structure with regular shapes, the specification types of the first plastic sheet body are reduced, and according to the actual coupling strength debugging range, first metal layers with various shapes and areas can be formed on the surface of the first plastic sheet body. The first metal layer is arranged on one side surface of the first plastic sheet body, can be arranged on two opposite side surfaces of the first plastic sheet body along the thickness direction X, and can be arranged on the side surface of the first plastic sheet body along the width direction Y.

Specifically, the first metal layer is manufactured by additive material, physical vapor deposition, spraying, gluing or hot pressing on the surface of the first plastic sheet. The deposition thickness of the metal layer can be precisely controlled by additive manufacturing, physical vapor deposition or spraying processes, and the size of the deposition thickness can be controlled to be in the micrometer scale. The bonding process can be used for sticking the first metal layer which is obtained by processing and manufacturing on the first plastic sheet body after the shape and the size of the first metal layer are qualified, so that the phenomenon that the whole coupling adjusting structure 40 is scrapped due to the fact that the first metal layer is directly processed on the first plastic sheet body and the performance requirement is not met due to processing errors and the like is avoided, and the reject ratio is reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (12)

1. A coupling adjustment structure, characterized in that: the coupling adjusting structure comprises a connecting sheet, two coupling sheets, a first mounting sheet and a second mounting sheet, wherein the coupling sheets are perpendicular to each other in pairs and have a height direction, a thickness direction and a width direction, the projection area of the coupling sheets in the thickness direction is larger than the projection area of the coupling sheets in the width direction, the coupling sheets are provided with a first end and a second end in the height direction, the first ends of the coupling sheets are respectively connected with two ends of the connecting sheet, the first mounting sheet and the second mounting sheet are connected with the second end, the first mounting sheet and the second mounting sheet are distributed at intervals in the height direction to form clamping intervals, and the first mounting sheet is positioned above the second mounting sheet.

2. The coupling adjustment structure of claim 1, wherein: the coupling piece is in a flat plate shape or is bent around the height direction.

3. The coupling adjustment structure of claim 1, wherein: the coupling adjusting structure further comprises a limiting piece, one end of the limiting piece is connected to one of the coupling pieces, the other end of the limiting piece extends towards the other coupling piece, and the limiting piece is located between the two coupling pieces.

4. A coupling adjustment structure according to claim 3, characterized in that: the coupling piece has first window, the one end of spacing piece connect in the lateral wall of first window, the other end of spacing piece is towards another the coupling piece setting of bending.

5. The coupling adjustment structure of claim 1, wherein:

One side surface of the first mounting piece, which is close to the second mounting piece, extends obliquely downwards or horizontally;

And/or the second mounting piece extends upwards in an inclined way away from one side surface of the first mounting piece.

6. The coupling adjustment structure of claim 1, wherein:

the first mounting piece is a turned-over edge connected to the second end part;

Or one end of the first mounting plate is connected to the second end of one coupling plate, and the other end of the first mounting plate extends away from the other coupling plate.

7. The coupling adjustment structure of claim 1, wherein:

the second end part is punched and bent to form the second mounting piece;

Or one end of the second mounting piece is connected to the second end of one coupling piece, and the other end of the second mounting piece extends in a direction away from the other coupling piece.

8. The coupling adjustment structure of claim 1, wherein: the second end of each of the coupling pieces is connected with the first mounting piece and the second mounting piece.

9. The coupling adjustment structure of claim 1, wherein: the outer side wall of the second end part between the first mounting piece and the second mounting piece is an arc surface.

10. The coupling adjustment structure according to any one of claims 1 to 9, characterized in that: the connecting piece is elastically bent around the width direction.

11. A filter, characterized by: the filter comprises a cavity, a cover plate, resonant pieces and the coupling adjusting structure according to any one of claims 1 to 10, wherein the number of the resonant pieces is more than two, the resonant pieces are arranged in the cavity, the cavity is provided with an opening, the cover plate covers one end of the cavity, which is provided with the opening, the cover plate is provided with a mounting hole, the coupling adjusting structure rotatably clamps the two ends of the mounting hole through the clamping interval, and the coupling piece is positioned between the two resonant pieces.

12. The filter of claim 11, wherein: the outer side wall of the second end part between the first mounting piece and the second mounting piece is abutted against the hole wall of the mounting hole.