WO2021134425A1

WO2021134425A1 - Cavity filter and communication device

Info

Publication number: WO2021134425A1
Application number: PCT/CN2019/130381
Authority: WO
Inventors: 温世议; 龚爱强
Original assignee: 深圳市大富科技股份有限公司
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-07-08
Also published as: CN216436091U

Abstract

A cavity filter and a communication device. The cavity filter comprises a filter cavity, a cover plate covering the filter cavity to form a resonant cavity, and a resonant rod provided in the resonant cavity; an adjustment assembly is provided outside the resonant cavity, and the adjustment assembly is connected to a deformation region of the cover plate to drive the deformation region to perform deformation motion. As the adjustment assembly and the deformation region are connected together, when the adjustment assembly moves, a part, connected to the adjustment assembly, of the deformation region also moves correspondingly, and then a deformation degree of the deformation region is adjusted, and an adjustable range of the deformation region is relatively broad. The adjustment assembly can pull a deformed part of the deformation region back to a needed reset degree. Compared with the solution of automatically resetting merely depending on the property of the cover plate itself, as there is an acting force between the adjustment assembly and the cover plate, this invention has higher controllability of the reset degree of the cover plate, thereby being able to freely control the deformation degree of the deformation region during debugging, facilitating the debugging operation.

Description

Cavity filter and communication equipment

Technical field

The present invention relates to the technical field of filtering equipment, in particular to a cavity filter and communication equipment.

Background technique

In an existing cavity filter, the adjusting screw is placed above the cover plate. When the frequency is adjusted, the bottom end of the adjusting screw contacts and presses the deformation zone of the cover plate to change the deformation degree of the deformation zone.

In the debugging process before the product is shipped, it is necessary to drive the cover plate to deform to different degrees for testing until the product meets the requirements of various indicators. For the above cavity filter, in the debugging process, after the cover is deformed by the adjusting screw, if you want to reset the cover for other tests, you need to adjust the adjusting screw to separate the adjusting screw from the cover to release The pressure on the cover plate, and then the cover plate depends on the deformation of the material itself to rebound, but because the cover plate has undergone plastic deformation, it is difficult to completely rebound to the original position, which brings difficulties to debugging.

Therefore, how to debug more conveniently is a technical problem that those skilled in the art need to solve at present.

Summary of the invention

In view of this, the purpose of the present invention is to provide a cavity filter to facilitate the debugging process. Another object of the present invention is to provide a communication device including the above-mentioned cavity filter, the cavity filter of which can be easily debugged.

In order to achieve the above objectives, the present invention provides the following technical solutions:

A cavity filter includes a filter cavity, a cover plate that is covered on the filter cavity to form a resonant cavity, and a resonant rod arranged in the resonant cavity, and an adjustment component is provided outside the resonant cavity, The adjustment component is connected with the deformation zone of the cover plate to drive the deformation zone to move.

Preferably, the adjustment assembly includes an adjustment screw and a positioning plate, the positioning plate is fixed to a fixing area of the cover plate, and the fixing area is butted with the deformation area; the adjustment screw is threadedly connected to the positioning plate and the positioning plate. One of the deformation zones is rotatably connected to the other, so that the connection point between the deformation zone and the adjustment screw is driven to move linearly through the rotation of the adjustment screw.

Preferably, the adjusting screw includes a large-diameter section and a small-diameter section in sequence along the axial direction, and the large-diameter section is threadedly connected to the deformation zone; a positioning plate hole penetrates through the positioning plate, and the positioning plate hole is empty. Is sleeved on the small-diameter section, the small-diameter section is detachably connected with a first limiting structure, the step surface between the large-diameter section and the small-diameter section, and the first limiting structure axially position the Positioning plate.

Preferably, the positioning plate is provided with a threaded hole of the positioning plate, and the deformation zone is provided with a cover plate connection hole; the threaded hole of the positioning plate is threadedly connected to one end of the adjusting screw in the axial direction, and the cover plate The connecting hole is hollow at the other end; the adjusting screw is sequentially fixed with a stopper and a second limiting structure in the axial direction, and the cover plate connecting hole is axially arranged on the stopper and the second limiting structure In between, the second limiting structure is detachably connected to the adjusting screw.

Preferably, the resonance rod is fixed to the deformation zone to adjust the frequency by adjusting the distance between the disk surface on the end of the resonance rod away from the deformation zone and the inner wall of the resonance cavity.

Preferably, the resonance rod is provided with a groove body that opens toward the cover plate, the groove of the groove body is sealed and fixed to the deformation zone, and the adjusting screw is connected to the deformation zone and is located in the groove. The part of the mouth.

A communication device includes the cavity filter as described in any one of the above.

The cavity filter provided by the present invention includes a filter cavity, a cover plate covered on the filter cavity to form a resonant cavity, and a resonant rod arranged in the resonant cavity. The outer side of the resonant cavity is provided with an adjusting component, the adjusting component and the cover The deformation zones of the plates are connected to drive the deformation movement of the deformation zones.

Since the adjustment component and the deformation zone are connected together, while the adjustment component moves, the part of the deformation zone connected to the adjustment component will also move accordingly, thereby adjusting the degree of deformation of the deformation zone, and the adjustable range of the deformation zone is larger; For the deformed deformation zone, the adjustment component can pull it back to the required degree of reset. Compared with the automatic reset scheme that only relies on the nature of the cover itself, due to the force between the adjustment component and the cover, there is a strong impact on the cover. The controllability of the reset degree is higher, so that the deformation degree of the deformation zone can be freely controlled during the debugging process, which is convenient for the debugging work.

The communication device including the above-mentioned cavity filter provided by the present invention, the cavity filter of which can be conveniently debugged.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work.

FIG. 1 is an exploded view of Embodiment 1 of a cavity filter provided by the present invention;

2 is a cross-sectional view of Embodiment 1 of the cavity filter provided by the present invention;

3 is a cross-sectional view of Embodiment 1 of the cavity filter provided by the present invention when the adjusting screw is moved down to a position;

4 is a cross-sectional view of Embodiment 1 of the cavity filter provided by the present invention when the adjusting screw is moved to a position when it is reset;

5 is an exploded view of Embodiment 2 of the cavity filter provided by the present invention;

6 is a cross-sectional view of Embodiment 2 of the cavity filter provided by the present invention.

Reference signs:

1- filter cavity, 11- resonant cavity;

2-cover, 21-deformation zone, 22-fixed area, 23-cover connection hole, 24-butt joint, 25-connection;

3-resonant rod, 31-disk surface, 32-tank body;

4-Adjusting screw, 41-large diameter section, 42-small diameter section, 43-first limit structure, 44-step surface, 45-stop block, 46-second limit structure;

5-positioning plate, 51-threaded hole of positioning plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The core of the present invention is to provide a cavity filter to facilitate the debugging process. Another core of the present invention is to provide a communication device including the above-mentioned cavity filter, the cavity filter of which can be easily debugged.

It should be noted that when an element is referred to as "fixing" another element, it can be directly on the other element or a centered element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time. In addition, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than It indicates or implies that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

In a specific embodiment of the cavity filter provided by the present invention, please refer to FIG. 1 and FIG. 2, which includes a filter cavity 1, a cover plate 2 which is covered on the filter cavity 1 to form a resonant cavity 11, and is arranged on The resonant rod 3 in the resonant cavity 11. An adjustment component is arranged outside the resonant cavity 11, and the adjustment component is connected to the deformation zone 21 on the cover plate 2 to drive the deformation zone 21 to deform and move, thereby adjusting the frequency.

Since the adjustment component and the deformation zone 21 are connected together, while the adjustment component is moving, the part of the deformation zone 21 connected to the adjustment component will also move correspondingly, thereby adjusting the degree of deformation of the deformation zone 21 and the adjustment of the deformation zone 21 The range is large; for the deformed deformation zone 21, the adjustment component can pull it back to the required degree of reset, compared to the solution that only relies on the nature of the cover plate 2 to automatically reset, due to the gap between the adjustment component and the cover plate 2 With the presence of force, the controllability of the reset degree of the cover plate 2 is higher, so that the deformation degree of the deformation zone 21 can be freely controlled during the debugging process, which is convenient for the debugging work.

Further, the adjustment assembly includes an adjustment screw 4 and a positioning plate 5. The positioning plate 5 is fixed on the fixing area 22 of the cover plate 2, and the fixing area 22 is butted with the deformation area 21. Specifically, as shown in Figure 1, the middle of the fixing zone 22 of the cover plate 2 is provided with a fixing hole, the outer periphery of the deformation zone 21 is butted in the fixing hole, and the positioning plate 5 is fixed in the fixing hole, and is arranged side by side with the deformation zone 21 In addition, the fixing area 22 fixes the filter cavity 1 with screws.

Furthermore, as shown in FIG. 2, the adjusting screw 4 is threadedly connected to the deformation zone 21 and connected to the positioning plate 5 in rotation, so that the rotation of the adjusting screw 4 drives the connection 25 on the deformation zone 21 and the adjusting screw 4 to move linearly. Wherein, the adjustment screw 4 rotatingly connected to the positioning plate 5 means that the adjustment screw 4 and the positioning plate 5 are limited to have rotational freedom, but no movement freedom. Similarly, in other embodiments, for the adjustment screw 4 When the deformation zone 21 is connected by rotation, the adjustment screw 4 and the deformation zone 21 are limited to have a degree of freedom of rotation but not a degree of freedom of movement.

Based on the orientation shown in Figure 2, the upper and lower positions of the adjustment screw 4 are unchanged, and the position of the joint 24 on the deformation zone 21 and the fixed area 22 remains unchanged. With the rotation of the adjustment screw 4, the upper and lower positions of the deformation zone 21 and the adjustment screw 4 The connection part 25 will move up and down, and the distance between the connection part 25 and the above-mentioned docking part 24 will change accordingly, so the deformation zone 21 can be extended or retracted correspondingly, and the degree of deformation of the deformation zone 21 will correspondingly change.

In this kind of adjustment assembly, it is only necessary to rotate the adjustment screw 4 to adjust the deformation zone 21 to a desired degree of deformation, and the operation is convenient.

Further, referring to FIG. 2, the adjusting screw 4 is divided into a large-diameter section 41 and a small-diameter section 42 in the axial direction, and the diameter of the large-diameter section 41 is larger than that of the small-diameter section 42. The large-diameter section 41 is threadedly connected with the deformation zone 21. The positioning plate 5 is provided with a positioning plate hole through it, and the positioning plate hole is hollow on the small diameter section 42, and the small diameter section 42 and the positioning plate hole are specifically a small clearance fit. A first limiting structure 43 is detachably connected to the small diameter section 42. Preferably, as shown in FIG. 1, the first limiting structure 43 is a first retaining spring, the small diameter section 42 is provided with a first retaining slot, and the first retaining spring is embedded in the first retaining slot for easy installation. The step surface 44 between the large-diameter section 41 and the small-diameter section 42 and the first limiting structure 43 axially locate the positioning plate 5, and in the axial direction, the positioning plate 5 moves synchronously with the step surface 44 and the first limiting structure 43 , The relative axial position relationship remains unchanged.

In the process of assembling the adjusting screw 4, the large-diameter section 41 is first screwed into the threaded hole of the deformation zone 21, and then the positioning plate 5 is sleeved on the small-diameter section 42 and inserted into the fixing hole, and then the first circlip is used to position the The plate 5 is positioned on the adjusting screw 4, which is convenient for assembly.

Further, the resonance rod 3 is fixed to the deformation zone 21 of the cover plate 2, specifically, the two can be crimped into one body. During the assembly process, the resonant rod 3 can be fixed with the cover plate 2 as an integral structure and then integrated into the filter cavity 1, which can improve the assembly efficiency. In addition, the cavity filter adjusts the frequency by adjusting the distance between the disk surface 31 on the end of the resonant rod 3 away from the deformation zone 21 and the inner wall of the resonant cavity 11.

Further, the resonance rod 3 is provided with a groove body 32 that opens toward the cover plate 2. The groove of the groove body 32 is sealed and fixed to the deformation zone 21, and the adjusting screw 4 is connected to the part of the deformation zone 21 located in the groove to avoid adjustment The connection of the screw 4 and the cover plate 2 causes signal leakage.

The debugging process of the cavity filter provided in this embodiment is as follows:

As shown in Figure 3, when the adjusting screw 4 is rotated counterclockwise, the joint 25 on the deformation zone 21 and the adjusting screw 4 is driven to move down, and the deformation of the deformation zone 21 continues to increase. The bottom plate 31 of the resonance rod 3 and the cavity bottom of the resonance cavity 11 avoid As shown in Figure 4, turning the adjusting screw 4 clockwise, the adjusting screw 4 will pull the deformation zone 21 and the connecting part 25 of the adjusting screw 4 upward, and it can be moved upward and reset to any desired position. It can be moved up to be aligned with the positioning plate 5 at most.

Obviously, the setting of the connection relationship between the adjusting screw 4, the positioning plate 5 and the deformation zone 21 is not limited to the manner provided in the above-mentioned embodiment. In another embodiment, the adjusting screw 4 is threadedly connected to the positioning plate 5 and is rotatably connected to the deformation zone 21. When the adjusting screw 4 rotates, the adjusting screw 4 linearly moves and rotates relative to the positioning plate 5; the adjusting screw 4 can rotate relative to the position connected to the adjusting screw 4 on the deformation zone 21, and both of them move linearly at the same time.

Specifically, as shown in FIGS. 5 and 6, the positioning plate 5 is provided with a positioning plate threaded hole 51, and the deformation zone 21 is provided with a cover plate connection hole 23. The threaded hole 51 of the positioning plate is threadedly connected to one end of the adjusting screw 4 in the axial direction, and the cover connecting hole 23 is hollowed at the other end of the adjusting screw 4 in the axial direction. The cover connecting hole 23 and the adjusting screw 4 are specifically fitted with a small clearance. The screw 4 can rotate freely in the connecting hole 23 of the cover plate. The adjusting screw 4 is sequentially fixed with a stop 45 and a second limiting structure 46 in the axial direction. The stop 45 is integrally formed on the adjusting screw 4, and the second limiting structure 46 is detachably connected to the adjusting screw 4. The cover plate connecting hole 23 is axially arranged between the stopper 45 and the second limiting structure 46. In the axial direction, the cover plate connecting hole 23 moves synchronously with the stopper 45 and the second limiting structure 46 without relative Displacement. Among them, the second limiting structure 46 is preferably a second circlip, and the second circlip is specifically embedded and fixed in the second slot on the adjusting screw 4; or, the second limiting structure 46 can be replaced by a threaded connection to the adjusting screw 4. Screw 4 nut.

During the assembly process, the assembly of the adjusting screw 4 and the cover plate 2, the assembly of the cover plate 2 and the resonance rod 3, and the assembly of the adjusting screw 4 and the positioning plate 5 can be completed in sequence, which is convenient for assembly.

During the debugging process, based on the orientation shown in Figure 6, rotate the adjusting screw 4 clockwise, the adjusting screw 4 moves down, and the cover connecting hole 23 moves down synchronously. The deformation of the deformation zone 21 continues to increase, and the bottom plate 31 of the resonance rod 3 is in line with the resonance. The distance between the cavity bottom of the cavity 11 is continuously reduced; when the adjusting screw 4 is rotated counterclockwise, the adjusting screw 4 moves upward, and the connecting hole 23 of the cover plate moves upward synchronously, and the deformation degree of the deformation zone 21 is continuously reduced.

Obviously, the adjustment component is not limited to being set in the manner provided in the above embodiments. In another embodiment, the adjustment assembly includes a length adjuster with its own length adjustable, the housing of which is fixed to the fixing area 22, the output end is fixed to the deformation area 21, and the length of the output end extends from the housing to change the overall length of the adjuster. The length, in turn, changes the degree of deformation of the deformation zone 21.

In addition to the above-mentioned cavity filter, the present invention also provides a communication device that includes a cavity filter. Specifically, it may be the cavity filter provided in any of the above embodiments. For beneficial effects, please refer to the above implementations accordingly. example. For the structure of other parts of the communication device, please refer to the prior art, which will not be repeated here.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The cavity filter and communication equipment provided by the present invention have been introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation of the present invention. The description of the above examples is only used to help understand the method and core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

A cavity filter comprising a filter cavity (1), a cover plate (2) which is covered on the filter cavity (1) to form a resonant cavity (11), and a cover plate (2) arranged in the resonant cavity (11) The resonant rod (3) is characterized in that an adjustment component is provided outside the resonant cavity (11), and the adjustment component is connected to the deformation zone (21) of the cover plate (2) to drive the The deformation zone (21) deforms movement.
The cavity filter according to claim 1, wherein the adjustment assembly includes an adjustment screw (4) and a positioning plate (5), and the positioning plate (5) is fixed to the cover plate (2). The fixing zone (22), the fixing zone (22) is butted with the deformation zone (21); the adjusting screw (4) is threadedly connected to one of the positioning plate (5) and the deformation zone (21) The connecting point of the deformation zone (21) and the adjusting screw (4) is driven to move linearly through the rotary motion of the adjusting screw (4).
The cavity filter according to claim 2, wherein the adjusting screw (4) is divided into a large-diameter section (41) and a small-diameter section (42) in the axial direction, and the large-diameter section (41) and The deformation zone (21) is threaded; the positioning plate (5) is provided with a positioning plate hole, the positioning plate hole is hollow on the small diameter section (42), and the small diameter section (42) is The first limiting structure (43) is detachably connected, the step surface (44) between the large diameter section (41) and the small diameter section (42), and the first limiting structure (43) are axially positioned The positioning plate (5).
The cavity filter according to claim 2, characterized in that the positioning plate (5) is provided with a positioning plate threaded hole (51), and the deformation zone (21) is provided with a cover plate connection hole ( 23); The positioning plate threaded hole (51) is threadedly connected to one end of the adjusting screw (4) in the axial direction, and the cover plate connecting hole (23) is sleeved at the other end; the adjusting screw (4) is A stopper (45) and a second limiting structure (46) are sequentially fixed in the axial direction, and the cover plate connecting hole (23) is axially arranged on the stopper (45) and the second limiting structure ( 46), the second limiting structure (46) is detachably connected to the adjusting screw (4).
The cavity filter according to any one of claims 2 to 4, characterized in that the resonant rod (3) is fixed to the deformation zone (21), so that the resonant rod (3) is adjusted to be far away from the deformation zone (21). The distance between the disk surface (31) on the end of the deformation zone (21) and the inner wall of the resonant cavity (11) is used for frequency modulation.
The cavity filter according to claim 5, characterized in that the resonant rod (3) is provided with a groove body (32) that opens toward the cover plate (2), and the groove body (32) is The notch is sealed and fixed to the deformation zone (21), and the adjusting screw (4) is connected to the part of the deformation zone (21) located in the notch.
A communication device, characterized by comprising the cavity filter according to any one of claims 1 to 6.