Cavity filter with anti-loose debugging screw

Abstract

The utility model discloses a cavity filter with anti-loose debugging screws. The cavity filter comprises a cavity, a cover plate, a resonator, an input / output connector, a plurality of tuning screws and a plurality of nuts, the resonator is arranged in the cavity; the cover plate is arranged on the cavity and seals the open end of the cavity, a plurality of first threaded holes are formed in the cover plate, a plurality of first shaping grooves are formed in the outer side wall of the cover plate, the first shaping grooves are evenly distributed in the peripheral sides of the first threaded holes, and the stress directions of the first shaping grooves point to the centers of the first threaded holes; the input and output connector is arranged on the cavity and is connected with the resonator; the tuning screw rod is in threaded connection in the first threaded hole, and at least part of the tuning screw rod extends into the cavity and is arranged opposite to the resonator; the nut is arranged on the tuning screw and abuts against at least part of the first shaping groove. By means of the structure, it can be guaranteed that the size and flatness of a product meet the requirements, the nut and the debugging screw can be effectively prevented from loosening, and very good practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the field of filters, in particular to a cavity filter with an anti-loosening debugging screw. Background Art

[0002] The communication base station filter structure is usually composed of a cavity, a resonator, a cover, a debugging screw and an input and output connector. The debugging of the filter is achieved by adjusting the depth of the debugging screw. After adjustment, the debugging screw needs to be locked with a nut. However, in some cases, the debugging screw cannot be completely locked using only a nut. During transportation, the nut and the debugging screw may become loose. Therefore, a cavity filter with an anti-loosening debugging screw is urgently needed to solve the above problem. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a cavity filter with an anti-loosening debugging screw.

[0004] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: a cavity filter with an anti-loosening debugging screw, comprising a cavity, a cover plate, a resonator, an input and output connector, a plurality of tuning screws and a plurality of nuts;

[0005] The resonator is arranged in the cavity;

[0006] The cover plate is mounted on the cavity and closes the open end of the cavity. The cover plate is provided with a plurality of first threaded holes. The outer wall of the cover plate is provided with a plurality of first shaping grooves which are evenly distributed around the first threaded holes and whose force direction points to the center of the first threaded holes.

[0007] The input and output connectors are arranged on the cavity and connected to the resonator;

[0008] The tuning screw is threadedly connected in the first threaded hole and at least partially extends into the cavity and is arranged opposite to the resonator;

[0009] The nut is mounted on the tuning screw and abuts against at least a portion of the first shaping groove.

[0010] As one of the preferred embodiments of the present utility model, the first shaping groove is rectangular.

[0011] As one of the preferred embodiments of the present utility model, the first shaping groove is crescent-shaped and arranged around the first threaded hole.

[0012] As one of the preferred embodiments of the present utility model, the depth of the first shaping groove gradually increases from both sides to the middle.

[0013] As one of the preferred embodiments of the present utility model, the bottom surface of the first shaping groove is inclined toward the center of the first threaded hole.

[0014] As one of the preferred embodiments of the present utility model, the first shaping groove is recessed inwardly near the side wall of the first threaded hole to form a second shaping groove.

[0015] As one of the preferred embodiments of the utility model, a plurality of convex rings coaxial with the first threaded hole are arranged on the inner side wall of the cover plate, and the tuning screw is inserted into the convex ring.

[0016] As one of the preferred embodiments of the utility model, a second threaded hole is provided on the inner side wall of the convex ring, and the tuning screw is threadedly connected in the first threaded hole and the second threaded hole.

[0017] The beneficial effects of the utility model include: a cavity filter with an anti-loosening debugging screw, comprising a cavity, a cover plate, a resonator, an input-output connector, a plurality of tuning screws and a plurality of nuts; the resonator is arranged in the cavity; the cover plate is installed on the cavity and closes the open end of the cavity, a plurality of first threaded holes are arranged on the cover plate, and a plurality of first shaping grooves are arranged on the outer wall of the cover plate, which are evenly distributed around the first threaded holes and the force direction points to the center of the first threaded holes; the input-output connector is arranged on the cavity and connected to the resonator; the tuning screw is threadedly connected to the first threaded hole and at least partially extends into the cavity and is arranged opposite to the resonator; the nut is installed on the tuning screw and abuts against at least part of the first shaping groove; the above structure can not only ensure that the size and flatness of the product meet the requirements, but also effectively prevent the nut and the debugging screw from loosening, and has very good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of a cavity filter with an anti-loosening debugging screw;

[0020] Figure 2 It is an exploded view of a cavity filter with an anti-loosening debugging screw;

[0021] Figure 3 It is a structural schematic diagram of the first embodiment of the shaping groove;

[0022] Figure 4 It is a structural schematic diagram of the second embodiment of the shaping groove;

[0023] Figure 5 It is a structural schematic diagram of the third embodiment of the shaping groove;

[0024] Figure 6It is a structural schematic diagram of the fourth embodiment of the shaping groove. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0026] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0029] Reference Figures 1 to 6 , a cavity filter with a locking type tuning screw, comprising a cavity 10, a cover plate 20, a resonator, an input and output connector, a plurality of tuning screws 30 and a plurality of nuts 40;

[0030] The resonator is arranged in the cavity 10;

[0031] The cover plate 20 is mounted on the cavity 10 and closes the open end of the cavity 10. The cover plate 20 is provided with a plurality of first threaded holes 50. The outer wall of the cover plate 20 is provided with a plurality of first shaping grooves 60 evenly distributed around the first threaded holes 50 and with the force direction pointing to the center of the first threaded holes 50.

[0032] The input and output connectors are arranged on the cavity 10 and connected to the resonator;

[0033] The tuning screw 30 is threadedly connected in the first threaded hole 50 and at least partially extends into the cavity 10 and is arranged opposite to the resonator;

[0034] The nut 40 is mounted on the tuning screw 30 and abuts against at least a portion of the first shaping groove 60 .

[0035] In the utility model, after the cavity 10 is subjected to a shaping process, the force direction of the first shaping grooves 60 distributed around the first threaded hole 50 points to the center of the first threaded hole 50, which will cause the threads in the first threaded hole 50 to be slightly deformed, so that the threads in the first threaded hole 50 are evenly stressed, but will not damage the threads in the first threaded hole 50; during debugging, the tuning screw 30 is screwed in, and then the nut 40 is tightened. Since the threads in the first threaded hole 50 are slightly deformed, the tuning screw 30 and the nut 40 are more stable and less likely to loosen than the traditional method; the utility model has the advantage that the above structure can not only ensure that the size and flatness of the product meet the requirements, but also effectively prevent the nut and the debugging screw from loosening, and has very good practicality.

[0036] Reference Figure 1 , 2 3. As a first embodiment of the first shaping groove 60, the first shaping groove 60 is rectangular.

[0037] Reference Figure 5 , 6 As a second embodiment of the first shaping groove 60 , the first shaping groove 60 is crescent-shaped and arranged around the first threaded hole 50 .

[0038] As a further preferred embodiment of the second embodiment of the first shaping groove 60, the depth of the first shaping groove 60 gradually increases from both sides to the middle;

[0039] Reference Figure 4 , 5 6. As a third embodiment of the first shaping groove 60, the bottom surface of the first shaping groove 60 is inclined toward the center of the first threaded hole 50; this enables the first shaping groove 60 to better generate a force directed toward the center of the first threaded hole 50 when squeezed by the nut 40.

[0040] Reference Figure 6 As a fourth embodiment of the first shaping groove 60, the first shaping groove 60 is recessed inward near the side wall of the first threaded hole 50 to form a second shaping groove 70; the second shaping groove 70 will produce a greater deformation when squeezed by the nut 40, thereby further increasing the force directed to the center of the first threaded hole 50.

[0041] Preferably, a plurality of convex rings 80 coaxial with the first threaded hole 50 are provided on the inner wall of the cover plate 20, and the tuning screw 30 is inserted into the convex ring 80; the convex ring 80 can limit the tuning screw 30 and improve the stability of the tuning screw 30 in the first threaded hole 50.

[0042] Preferably, a second threaded hole 81 is provided on the inner wall of the convex ring 80 , and the tuning screw 30 is threadedly connected in the first threaded hole 50 and the second threaded hole 81 .

[0043] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A cavity filter with an anti-loosening debugging screw, characterized in that: It comprises a cavity (10), a cover plate (20), a resonator, an input and output connector, a plurality of tuning screws (30) and a plurality of nuts (40); The resonator is arranged in the cavity (10); The cover plate (20) is mounted on the cavity (10) and closes the open end of the cavity (10); a plurality of first threaded holes (50) are provided on the cover plate (20); and a plurality of first shaping grooves (60) are provided on the outer wall of the cover plate (20) and are evenly distributed around the first threaded holes (50) and the force direction of which points to the center of the first threaded holes (50); The input and output connector is arranged on the cavity (10) and connected to the resonator; The tuning screw (30) is threadedly connected to the first threaded hole (50) and at least partially extends into the cavity (10) to be arranged opposite to the resonator; The nut (40) is mounted on the tuning screw (30) and abuts against at least a portion of the first shaping groove (60).

2. The cavity filter with an anti-loosening debugging screw according to claim 1, characterized in that: The first shaping groove (60) is rectangular.

3. The cavity filter with a loose-proof debugging screw according to claim 1, characterized in that: The first shaping groove (60) is crescent-shaped and is arranged around the first threaded hole (50).

4. The cavity filter with a loose-proof debugging screw according to claim 3, characterized in that: The depth of the first shaping groove (60) gradually increases from both sides to the middle.

5. The cavity filter with a loose-proof debugging screw according to claim 1, characterized in that: The bottom surface of the first shaping groove (60) is inclined toward the center of the first threaded hole (50).

6. The cavity filter with a loose-proof debugging screw according to claim 1, characterized in that: The first shaping groove (60) is recessed inwardly near the side wall of the first threaded hole (50) to form a second shaping groove (70).

7. The cavity filter with a loose-proof debugging screw according to claim 1, characterized in that: A plurality of convex rings (80) coaxial with the first threaded hole (50) are arranged on the inner side wall of the cover plate (20), and the tuning screw (30) is inserted into the convex ring (80).

8. The cavity filter with anti-loosening debugging screw according to claim 7, characterized in that: A second threaded hole (81) is provided on the inner side wall of the convex ring (80), and the tuning screw (30) is threadedly connected in the first threaded hole (50) and the second threaded hole (81).

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