CN215184467U

CN215184467U - Filter and cover plate assembly thereof

Info

Publication number: CN215184467U
Application number: CN202121331728.4U
Authority: CN
Inventors: 钟志波; 谢新成
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-12-14
Anticipated expiration: 2031-06-15

Abstract

This application is applicable to communication equipment technical field, provides a wave filter and apron subassembly thereof, the apron subassembly includes: the cover plate is provided with a groove, and a part of the cover plate, which corresponds to the bottom of the groove along the depth direction of the groove, is a first wall body; the supporting component is arranged in the groove; an adjustment member connected to the support member, the adjustment member having a first end abutting a surface of the first wall; the adjusting component can move relative to the supporting component, so that the first end presses the first wall body to deform along the depth direction of the groove. The depth of the usable resonant cavity of the filter can be increased, and the performance of a product can be guaranteed.

Description

Filter and cover plate assembly thereof

Technical Field

The application belongs to the technical field of communication equipment, and particularly relates to a filter and a cover plate assembly thereof.

Background

With the rapid development of wireless communication technology, the market has more strict requirements on the performance and volume of communication base station equipment, and the requirements on the performance are excellent while the requirement on the performance is not too large. The metal coaxial cavity filter is a communication device which is used more. Fig. 1 is a schematic structural diagram of a metal coaxial cavity filter, and referring to fig. 1, the resonant cavity of the metal coaxial cavity filter is composed of a cavity 91, a resonant rod 92, a cover plate 93 and a tuning screw 94. The tuning screw 94 is connected with the cover plate 93 through threads, so that the tuning screw is mounted on the cover plate 93, one end of the tuning screw 94 extends into the cavity 91, and is locked and fixed through a nut of the cover plate 93. In use, the tuning screw 94 is rotated to change the length of the tuning screw 94 extending into the cavity 91, thereby changing the capacitance between the resonant rod 92 and the cover plate 93, and thus changing the frequency properties of the filter. For a product with a small volume (or space), if the metal coaxial cavity filter is applied, the adjusting screw rod can extend into the cavity of the filter, so that the depth of the available resonant cavity is reduced, and the performance of the product is affected.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a filter and a cover plate assembly thereof, which can ensure the performance of products.

In a first aspect, an embodiment of the present application provides a cover plate assembly of a filter, the cover plate assembly including:

the cover plate is provided with a groove, and a part of the cover plate, which corresponds to the bottom of the groove along the depth direction of the groove, is a first wall body;

the supporting component is arranged in the groove;

an adjustment member connected to the support member, the adjustment member having a first end abutting a surface of the first wall;

the adjusting component can move relative to the supporting component, so that the first end presses the first wall body to deform along the depth direction of the groove.

Optionally, the groove is provided with a step surface; the supporting component is positioned in the groove and is fixedly arranged on the step surface.

Optionally, the support member comprises a positioning member and a locking member; the positioning component is fixed in the groove, and the locking component is abutted against the positioning component;

the first end of the adjusting component penetrates through the positioning component and is abutted against the first wall body, the adjusting component is also provided with a second end opposite to the first end, and the second end is movably connected with the locking component.

Optionally the adjustment member is an adjustment screw; the adjusting screw rod is in threaded connection with the locking component; the positioning part is a metal elastic sheet which can deform in the depth direction of the groove; the metal elastic sheet is provided with a through hole for the adjusting screw to penetrate through, and the inner wall surface of the through hole is a smooth surface.

Alternatively,

the inner side wall of the groove is provided with a first sub-groove which is coaxial with the groove; the supporting component is arranged in the first subslot;

the groove is sequentially provided with a second side wall, a first side wall and a third side wall in the depth direction of the groove; the first side wall is a side wall of the first subslot; the second side wall, the first side wall and the third side wall are all annular side walls;

in the width direction of the groove, the width of the ring corresponding to the third side wall is greater than that of the ring corresponding to the second side wall, and the width of the ring corresponding to the first side wall is greater than that of the ring corresponding to the third side wall.

In a second aspect, embodiments of the present application provide a filter, including a cavity, a resonant rod, and the cover plate assembly of any one of the above first aspects;

the cavity is of an open hollow structure;

the cover plate component covers the opening of the cavity;

the resonance pole set up in the inside of cavity, the resonance pole has first terminal surface, the first terminal surface of resonance pole faces first wall body, first terminal surface with can form electric capacity between the first wall body.

Optionally, the cover plate has a first face, the first face being planar and facing the first end face of the resonant rod.

Optionally, the first wall has a first wall surface facing away from the first end surface of the resonance rod; the outer contour of the cross section of the opening can enclose the outer contour of the first wall.

Optionally, in the depth direction of the groove, the outer contour projection of the first wall surface may surround the outer contour projection of the first end surface.

Optionally, the adjustment member and the first wall body are both directly opposite to the first end face of the resonance rod.

Compared with the prior art, the embodiment of the application has the beneficial effects that:

through making the regulating part relative support component motion, the first end of regulating part extrudees the first wall body of apron along the degree of depth direction of recess and warp, makes the first wall body of apron to the distance of the first terminal surface of resonance bar change to the frequency of adjusting the filter list chamber. Therefore, the frequency of the filter can be effectively adjusted by utilizing the deformation of the cover plate, and the adjusting part is prevented from extending into the cavity of the filter, so that the depth of the usable resonant cavity of the filter is increased, and the performance of a product can be ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a conventional metal coaxial cavity filter;

fig. 2 is a schematic perspective view of a filter provided in an embodiment of the present application;

FIG. 3 is a top view of a filter provided by an embodiment of the present application;

fig. 4 is a cross-sectional view of a filter provided by an embodiment of the present application;

fig. 5 is a cross-sectional view of a cover plate of a filter provided by an embodiment of the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to fig. 1 to 5 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The embodiment of the application provides a filter. Fig. 2 is a schematic perspective view of a filter provided in an embodiment of the present application; FIG. 3 is a top view of a filter provided by an embodiment of the present application; referring to fig. 2 and 3, the filter is a cavity filter. The filter provided by the embodiment of the present application includes a cover plate assembly 100, a resonance bar 200, and a cavity 300.

Fig. 4 is a cross-sectional view of a filter provided in an embodiment of the present application, and referring to fig. 4, a cavity 300 is an open hollow structure having an opening 301 and a cavity 302.

The cover plate assembly 100 covers the opening 301 of the cavity 300.

The cover assembly 100 includes a cover 11, a support member 12, and an adjustment member 13. Wherein, the cavity 300, the resonant rod 200 and the cover plate 11 constitute a filter resonant cavity. Wherein, the opening 301 of the cavity 300 is covered by the cover plate 11.

Referring to fig. 4, the cover plate 11 is provided with a groove 110 and a first wall 111, and the first wall 111 is a wall in the depth direction Z of the groove 110. The first wall 111 is a thin wall. The thickness of the first wall 111 is smaller than the thickness of other portions of the cover plate 11 (such as the first step structure 112 below). The cover plate 11 is formed by a flat plate with a groove 110, and the sum of the thickness of the first wall 111 and the depth of the groove 110 is equal to the whole thickness of the cover plate 11.

Due to the presence of the groove 110, the cover plate 11 is formed with a first step structure 112 around the groove 110. The thickness of the first step structure 112 is the maximum thickness of the cap plate 11. The thickness of the first wall 111 is smaller than that of the first step structure 112.

Fig. 5 is a cross-sectional view of the cover plate 11 of the filter according to the embodiment of the present application, and referring to fig. 5, the first wall 111 of the cover plate 1 has a first wall 1110 (the first wall 1110 is a front surface of the first wall 111), and the first wall 1110 also serves as a surface of the bottom of the groove 110; as can be seen, the first wall 111 is a portion of the cover plate 11 corresponding to the bottom of the groove 110 along the depth direction Z of the groove 110.

Referring to fig. 4, the resonant rod 200 is disposed inside the cavity 300, the resonant rod 200 has a first end surface 201, the first end surface 201 faces the first wall 111, and a capacitor can be formed between the first end surface 201 and the first wall 111. Wherein, referring to fig. 4 and 5, the first wall 1110 faces away from the first end surface 201 of the resonant rod 200. Referring to fig. 4, the cover plate 11 has a first surface 1100, the first surface 1100 is a plane and faces the first end surface 201 of the resonant rod 200, and the first surface 1100 includes the second wall 1111 (which is a back surface of the first wall 111) of the first wall 111, so that a capacitor is formed between the first end surface 201 of the resonant rod 200 and the first surface 1100 of the cover plate 11.

Referring to fig. 4, the support member 12 is used to support the adjustment member 13. The support member 12 is provided on the cover plate 11; illustratively, the inner side wall of the groove 110 is partially recessed to form a step surface 1101, and the support member 12 is positioned in the groove 110 and fixedly disposed on the step surface 1101. The position of the support member 12 is fixed relative to the cover plate 11 without being subjected to an external force.

Referring to fig. 4, the adjustment member 13 has a first end 131 and a second end 132; the second end 132 is opposite the first end 131. The first end 131 of the adjustment member 13 abuts against the surface of the first wall 111, that is, the first wall 1110 of the first wall 111.

Referring to fig. 4, the adjustment member 13 is coupled, such as threadedly coupled, to the support member 12. The adjustment member 13 is movable relative to the support member 12 such that the first end 131 of the adjustment member 13 presses the first wall 111 to deform in the depth direction Z of the groove 110. Illustratively, referring to fig. 4, the adjustment member 13 is an adjustment screw; the support member 12 includes a positioning member 121 and a locking member 122; the positioning component 121 is a metal elastic sheet capable of deforming in the depth direction Z of the groove 110, and when the first end 131 of the adjusting component 13 presses the first wall body 111, the positioning component 121 also slightly deforms in the depth direction Z of the groove 110, so that the first wall body 111 is prevented from being damaged due to too much force for pressing the first wall body 111; referring to fig. 2, the positioning member 121 has a hollow 1211, which facilitates deformation of the positioning member 121; referring to fig. 4, the locking member 122 is a nut; the positioning component 121 is fixedly arranged in the groove 110, and referring to fig. 4 and 5, the positioning component 121 is specifically carried on the step surface 1101 of the groove 110; referring to fig. 4, a through hole 1210 through which the adjusting member 13 (adjusting screw) is inserted is formed in the middle of the positioning member 121, the inner wall surface of the through hole 1210 is a smooth surface, the adjusting member 13 is disposed in the through hole 1210 of the positioning member 121, specifically, the first end 131 of the adjusting member 13 is located in the through hole 1210, and the first end 131 penetrates through the positioning member 121 and abuts against the first wall 111; the locking member 122 (nut) abuts against the positioning member 121, specifically, the locking member 122 is provided on an end surface of the positioning member 121; the second end 132 of the adjusting member 13 is exposed from the positioning member 121 and movably connected (specifically, screwed) with the locking member 122, so that the adjusting member 13 is also disposed in the groove 110; since the locking member 122 (nut) is supported on the step surface 1101 of the cover plate 11 by the positioning member 121, and the position of the locking member 122 (nut) is substantially fixed with respect to the cover plate 11, the adjusting member 13 (adjusting screw) is rotated, and the adjusting member 13 moves downward in the depth direction Z of the groove 110 with respect to the locking member 122 (nut) to press the first wall 111, so that the first wall 111 deforms in the depth direction Z of the groove 110; in this way, the distance between the first wall 111 of the cover 11 and the first end surface 201 of the resonant rod 200 changes, and under the condition that other parameters influencing the capacitance are not changed, the capacitance formed between the first wall 111 and the first end surface 201 changes, and the frequency of the filter is inversely proportional to the magnitude of the capacitance, so that the frequency of the filter changes.

In the process that the adjusting member 13 (adjusting screw) is rotated, the adjusting member 13 moves downward along the depth direction Z of the groove 110 relative to the locking member 122 (nut) to press the first wall 111, and the positioning member 121 is a metal elastic sheet capable of deforming in the depth direction Z of the groove 110, so that the positioning member 121 slightly deforms downward along the depth direction Z of the groove 110 relative to the cover plate 11, and the locking member 122 disposed on the positioning member 121 also moves downward along the depth direction Z along with the positioning member 121. If the positioning member 121 has a sufficiently strong resistance against deformation, the position of the positioning member 121 relative to the cover plate 11 in the depth direction Z of the recess 110 is fixed and the position of the locking member 122 relative to the cover plate 11 in the depth direction Z of the recess 110 is also fixed when the adjustment member 13 (adjustment screw) is rotated.

As can be seen from the above description, the filter provided in the embodiment of the present application adjusts the frequency of the single cavity of the filter by moving the adjusting member 13 relative to the cover plate 11 to press and deform the first wall 111 of the cover plate 11 along the depth direction Z of the groove 110, so that the distance from the first wall 111 of the cover plate 11 to the first end surface 201 of the resonant rod 200 is changed. Therefore, the frequency of the filter can be effectively adjusted by utilizing the deformation of the cover plate 11, and the adjusting part 13 is prevented from extending into the cavity 300 of the filter, so that the depth of the usable resonant cavity of the filter is increased, and the performance of the product can be ensured. In the process that the first end 131 of the adjusting component 13 presses the first wall 111 of the cover plate 11 to deform, the cover plate 11 and the cavity 300 are always attached, so that the filter has good intermodulation continuity.

Referring to fig. 5, the inner sidewall of the groove 110 is opened with a first sub-groove 1105 coaxial with the groove 110; the first subslot 1105 is specifically an annular slot, such as a circular slot or a square annular slot; referring to fig. 4 and 5, the support member 12 is disposed in the first subslot 1105. Referring to fig. 5, the groove 110 is sequentially provided with a second sidewall 1102, a first sidewall 1109 and a third sidewall 1103 in the depth direction Z thereof, and the second sidewall 1102, the first sidewall 1109 and the third sidewall 1103 are all annular sidewalls; wherein the first sidewall 1109 is a sidewall of the first subslot 1105; in the depth direction Z of the groove 110, the first sidewall 1109 is located between the second sidewall 1102 and the third sidewall 1103; in the width direction X of the groove 110, the width of the ring shape corresponding to the third sidewall 1103 is greater than the width of the ring shape corresponding to the second sidewall 1102, and the width of the ring shape corresponding to the first sidewall 1109 is greater than the width of the ring shape corresponding to the third sidewall 1103. Thus, the space surrounded by the support component 12 from the third sidewall 1103 can be placed in the first sub-groove 1105, so that the support component 12 can be carried in the first sub-groove 1105, and the support component 12 can be conveniently taken and placed.

Referring to fig. 4, the outer contour (e.g., circular) of the cross section of the opening 301 of the cavity 300 can surround the outer contour (e.g., circular) of the first wall 1110, and the outer edge of the cover plate 11 is fixedly connected to the end of the corresponding opening 301 of the cavity 300, so that when the first wall 111 is deformed, the end surface of the cover plate 11 can be always attached to the end surface of the cavity 300, and intermodulation continuity of the filter can be sufficiently ensured.

Referring to fig. 4 and 5, in the depth direction Z of the groove 110, the projection of the outer contour (e.g. circular) of the first wall 1110 can surround the projection of the outer contour (e.g. circular) of the first end surface 201 of the resonant rod 200, and it can be ensured that when the first end 131 of the adjusting member 13 presses the first wall 1110, the deformation of the first wall 111 can completely act on the change of the capacitance, and thus the frequency of the filter.

Referring to fig. 4, the adjusting part 13 and the first wall 111 are both opposite to the first end surface 201 of the resonance rod 200, and the adjusting part 13, the first wall 111 and the first end surface 201 of the resonance rod 200 are coaxial; thus, the filter provided by the embodiment of the application is a coaxial cavity filter.

In another embodiment of the present application, the supporting member 12 is a unitary structure, a threaded hole is provided in the middle of the supporting member 12, and the adjusting member 13 (e.g., an adjusting screw) is located in the threaded hole, so that rotating the adjusting member 13 (adjusting screw) can also press the first wall 111 to deform the first wall 111 along the depth direction Z of the groove 110, thereby changing the frequency of the filter.

The conventional filter adjusts the frequency by adjusting the length of the adjusting screw rod extending into the cavity of the filter, adjusts the frequency of a single cavity, the adjusting range is limited by the depth of the resonant cavity, and the used adjusting screw rods are various.

In contrast, in the filter provided by the embodiment of the present application, the distance from the first surface 1100 of the cover plate 11 to the first end surface 201 of the resonant rod 200 is adjusted by using the deformation of the first wall 111, so as to adjust the frequency of the single cavity, and the number of the adjusting parts 13 (adjusting screws) can be reduced to one. The filter that this application embodiment provided does not confine the frequency that the single chamber was adjusted to the degree of depth size of resonant cavity to only having used an adjusting screw, can guaranteeing the uniformity of material, can effectual solution tuning screw adjust the problem that the space is not enough with the screw rod variety.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cover plate assembly for a filter, the cover plate assembly comprising:

the supporting component is arranged in the groove;

2. The cover plate assembly of claim 1, wherein: the groove is provided with a step surface; the supporting component is positioned in the groove and is fixedly arranged on the step surface.

3. The cover plate assembly of claim 1, wherein: the supporting component comprises a positioning component and a locking component; the positioning component is fixed in the groove, and the locking component is abutted against the positioning component;

4. The cover plate assembly of claim 3, wherein: the adjusting part is an adjusting screw rod; the adjusting screw rod is in threaded connection with the locking component; the positioning part is a metal elastic sheet which can deform in the depth direction of the groove; the metal elastic sheet is provided with a through hole for the adjusting screw to penetrate through, and the inner wall surface of the through hole is a smooth surface.

5. The cover plate assembly of any one of claims 1 to 4, wherein: the inner side wall of the groove is provided with a first sub-groove which is coaxial with the groove; the supporting component is arranged in the first subslot;

6. A filter, characterized by: comprising a cavity, a resonant rod and a cover plate assembly according to any one of claims 1 to 5;

the cavity is of an open hollow structure;

the cover plate component covers the opening of the cavity;

7. The filter of claim 6, wherein: the cover plate is provided with a first surface, and the first surface is a plane and faces to the first end face of the resonance rod.

8. The filter of claim 6, wherein: the first wall body is provided with a first wall surface, and the first wall surface faces away from the first end surface of the resonance rod; the outer contour of the cross section of the opening can enclose the outer contour of the first wall.

9. The filter of claim 8, wherein: in the depth direction of the groove, the outer contour projection of the first wall surface can surround the outer contour projection of the first end surface.

10. A filter as claimed in any one of claims 6 to 9, wherein: the adjusting part and the first wall body are opposite to the first end face of the resonance rod.