Screw adjusting assembly and filter

Abstract

The utility model discloses an adjusting screw assembly. An adjusting screw structure comprises a cover plate, an adjusting screw and a wave spring. The cover plate is provided with a first through hole, the adjusting screw comprises a head part and a rod part integrally arranged with the lower side face of the head part, and the rod part is movably arranged in the first through hole and is rotatably connected with the hole wall of the first through hole in a matched mode. The rod part is sleeved with the wave spring, one end of the wave spring elastically abuts against the outer surface of the cover plate, and the other end of the wave spring elastically abuts against the lower side face of the head part. And the rod part of the adjusting screw and the cover plate can be locked within an adjustable range through the tension of the wave spring. The utility model also discloses a filter. Through the arrangement, the installation process is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electronic devices, in particular to an adjusting screw assembly and a filter. Background Art

[0002] In the prior art, cavity filters have become an important part of wireless communication. Existing cavity filters generally consist of input and output ports, a cavity, resonators, a cover plate, and an adjusting screw assembly and other components. Among them, the adjusting screw assembly can finely adjust the cavity filter to achieve the purpose of changing the frequency. However, at present, the adjusting screw assembly in the industry generally consists of an adjusting screw, a lock nut, and an external serrated washer, or an adjusting screw and a lock nut assembly, with many parts, and it is easy to have a large cumulative tolerance, reducing the tuning accuracy of the filter. Moreover, the adjusting screw, the lock nut, and the cover plate are mostly made of metal, and they are generally connected by threads. Therefore, metal wires are easily generated during the assembly process, affecting the electrical performance and reliability of the product.

[0003] Therefore, it is necessary to provide an adjusting screw assembly and a filter to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an adjusting screw assembly and a filter, which simplifies the installation process and reduces the production cost.

[0005] To achieve the above purpose, the utility model adopts the following technical solution 1:

[0006] An adjusting screw assembly, comprising:

[0007] A cover plate having a first through hole;

[0008] An adjusting screw, comprising a head and a rod portion integrally provided on the lower side of the head, the rod portion being movably disposed in the first through hole and rotatably mating with the inner wall of the first through hole;

[0009] A wave spring sleeved on the rod portion, one end of the wave spring elastically abutting against the outer surface of the cover plate, and the other end of the wave spring elastically abutting against the lower side of the head, and the rod portion of the adjusting screw and the cover plate can be locked within an adjustable range by the tension of the wave spring.

[0010] Further, the wave spring is a flat-top wave spring, and the flat-top wave spring is made of one of iron, copper, aluminum, stainless steel, and aluminum alloy.

[0011] Further, the wave spring includes a plurality of annular elastic pieces in a wavy shape with ups and downs, and the plurality of annular elastic pieces are connected end to end in a stacked manner. Each annular elastic piece has a wave crest portion and a wave trough portion that are staggered up and down, and the wave crest portion of the annular elastic piece is in contact connection with the wave trough portion of the adjacent annular elastic piece in the vertical direction.

[0012] Further, a limiting groove is provided on the lower side of the head of the adjusting screw. One end of the wave spring is elastically abutted against the outer surface of the cover plate, and the other end of the wave spring is elastically abutted in the limiting groove.

[0013] Further, the material of the adjusting screw is one of iron, copper, aluminum, stainless steel, and aluminum alloy.

[0014] Further, an internal thread is provided on the hole wall of the first through hole, an external thread is provided on the rod portion of the adjusting screw, and the rod portion is threadedly connected to the hole wall of the first through hole.

[0015] To achieve the above object, the present utility model adopts the following technical solution two:

[0016] A filter, the filter includes the adjusting screw assembly as described above. The filter further includes a body and at least one resonant rod. The body has a receiving cavity, the resonant rod is disposed in the receiving cavity, the receiving cavity has an opening, the cover plate covers the opening, the resonant rod has a resonant cavity, the resonant cavity faces the opening, the resonant cavity is communicated with the receiving cavity, and at least part of the rod portion of the adjusting screw sequentially passes through the wave spring and the cover plate and then extends into the resonant cavity.

[0017] Further, the body includes a bottom wall and a side wall vertically extending upward from the edge of the bottom wall, and the bottom wall and the side wall form the receiving cavity; the body further includes a wall body, the wall body is disposed in the receiving cavity, and the wall body is respectively connected to the side wall and the bottom wall to divide the receiving cavity into at least two sub-receiving cavities, and each sub-receiving cavity houses one of the resonant rods.

[0018] Further, a window is provided on the wall body, the cover plate has a second through hole, the window and the second through hole are arranged vertically corresponding to each other, the rod portion of the adjusting screw is rotatably and cooperatively connected with the hole wall of the second through hole through the wave spring, and at least part of the rod portion is inserted into the window.

[0019] Further, the filter further includes a flying rod assembly. The flying rod assembly is disposed in the window. The flying rod assembly includes a card seat and a flying rod. The card seat is clamped in the window. The card seat has a top end and a bottom end arranged oppositely. The flying rod is clamped in the bottom end. The top end of the card seat has a connection hole, and the rod portion of the adjusting screw passes through the second through hole and is connected to the connection hole.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] The present utility model discloses an adjusting screw assembly. The adjusting structure includes a cover plate, an adjusting screw, and a wave spring. The cover plate has a first through hole. The adjusting screw includes a head and a rod portion integrally provided on the lower side of the head. The rod portion is movably disposed in the first through hole. By sleeving the wave spring on the rod portion of the adjusting screw, one end of the wave spring elastically abuts against the outer surface of the cover plate, and the other end of the wave spring elastically abuts against the lower side surface of the head of the adjusting screw. When the rod portion of the adjusting screw rotates in cooperation with the hole wall of the first through hole, the rod portion of the adjusting screw and the cover plate can be locked within an adjustable range through the tension of the wave spring, simplifying the installation process, improving the assembly efficiency, and reducing the cost. Description of the Drawings

[0022] Figure 1 is a three-dimensional schematic diagram of the filter of the present utility model;

[0023] Figure 2 is Figure 1 a three-dimensional exploded schematic diagram of

[0024] Figure 3 is a three-dimensional schematic diagram of the wave spring in the present utility model;

[0025] Figure 4 is Figure 3 the front view of

[0026] Figure 5 is a three-dimensional schematic diagram of the body, the resonant rod, and the card seat in the present utility model;

[0027] Figure 6 is Figure 5 the top view of

[0028] Figure 7 is Figure 1 the top view of

[0029] Figure 8 is Figure 7 the sectional schematic diagram along the line A-A in

[0030] Figure 9 is Figure 1 the top view of

[0031] Figure 10 is Figure 9 the sectional schematic diagram along the line B-B in

[0032] Figure 11 is a three-dimensional exploded schematic diagram of the adjusting screw, the wave spring, the body, the resonant rod, and the fly rod assembly in the present utility model;

[0033] Figure 12 is a three-dimensional schematic diagram of the adjusting screw in the present utility model;

[0034] Figure 13 is Figure 12 a schematic cross-sectional view of;

[0035] Figure 14 is a three-dimensional schematic diagram of the flying rod assembly in the present utility model.

[0036] Description of the reference numerals in the drawings:

[0037] 100, adjusting screw assembly;

[0038] 1, cover plate; 101, first through hole; 102, second through hole; 11, outer surface; 12, inner surface;

[0039] 2, adjusting screw; 21, head; 211, lower side surface; 212, upper side surface; 22, rod part; 221, external thread; 23, limiting groove;

[0040] 3, corrugated spring; 31, annular elastic sheet; 311, wave crest part; 312, wave trough part; 32, first flat sheet; 33, second flat sheet;

[0041] 200, filter

[0042] 4, body; 40, accommodating cavity; 401, sub-accommodating cavity; 41, bottom wall; 42, side wall; 43, wall body; 431, window; 432, guide rail; 44, boss;

[0043] 5, resonant rod; 501, resonant cavity;

[0044] 6, flying rod assembly; 61, card seat; 611, top end; 601, connection hole; 612, bottom end; 613, guide groove; 62, flying rod. Detailed implementation manners

[0045] Hereinafter, the exemplary specific implementation manners of the present utility model will be described in detail with reference to the drawings. If there are several specific implementation manners, the features in these implementation manners can be combined with each other without conflict. When the description involves the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The content described in the following exemplary specific implementation manners does not represent all implementation manners consistent with the present utility model; on the contrary, they are only examples of devices, products, and / or methods consistent with some aspects of the present utility model recorded in the claims of the present utility model.

[0046] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the scope of protection of the present invention. The singular forms "a", "said" or "the" used in the specification and claims of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0047] Please refer to Figures 1 to 14 The utility model discloses an adjusting screw assembly 100, which includes a cover plate 1, an adjusting screw 2 and a wave spring 3. The cover plate 1 has a first through hole 101, and the adjusting screw 2 includes a head 21, and the head 21 has an upper side 212 and a lower side 211 that are arranged opposite to each other. The adjusting screw 2 also includes a rod 22 that is integrally arranged with the lower side 211 of the head 21, and the rod 22 is movably arranged in the first through hole 101 and is rotatably matched and connected with the hole wall of the first through hole 101. The cover plate 1 includes an outer surface 11 and an inner surface 12 that are arranged opposite to each other, and the outer surface 11 and the lower side 211 are arranged face to face. The wave spring 3 is sleeved on the rod 22, and one end of the wave spring 3 elastically abuts against the outer surface 11 of the cover plate 1, and the other end of the wave spring 3 elastically abuts against the lower side 211 of the head 21. The tension of the wave spring 3 can lock the rod 22 of the adjusting screw 2 and the cover plate 1 within an adjustable range. Such a configuration can simplify the installation process, thereby reducing the production cost.

[0048] Please refer to Figures 3 to 4 The wave spring 3 is a flat-top wave spring 3, and the material of the flat-top wave spring 3 is one of iron, copper, aluminum, stainless steel, and aluminum alloy. The material of the flat-top wave spring 3 in this embodiment is aluminum alloy, which can ensure the elastic force of the flat-top wave spring 3 while reducing the weight of the flat-top wave spring 3, thereby making the overall structure of the screw adjustment assembly 100 lighter.

[0049] The wave spring 3 includes a plurality of annular spring pieces 31 in a wave shape that rises and falls. The plurality of annular spring pieces 31 are connected end to end in a stacked shape. Each annular spring piece 31 has a wave crest portion 311 and a wave trough portion 312 that are staggered up and down. The wave crest portion 311 of the annular spring piece 31 is in contact with the wave trough portion 312 of the adjacent annular spring piece 31 in the vertical direction. As the adjusting screw 2 and the cover plate 1 are tightened, the wave spring 3 is compressed and elastically deformed in the vertical direction. At the same time, the head portion 21 of the adjusting screw 2 and the cover plate 1 are simultaneously subjected to the reaction force of the wave spring 3 in the vertical direction, so that the rod portion 22 of the adjusting screw 2 and the cover plate 1 can achieve self-locking at any position, thereby improving the tuning stability of the adjusting screw 2.

[0050] The wave spring 3 further includes a first flat plate 32 and a second flat plate 33. The first flat plate 32 is disposed on the top of a plurality of annular elastic pieces 31, and the second flat plate 33 is disposed on the bottom of the plurality of annular elastic pieces 31. The first flat plate 32, the plurality of annular elastic pieces 31, and the second flat plate 33 are integrally bent into a spiral shape. When the adjusting screw 2 is rotationally engaged with the cover plate 1, the first flat plate 32 abuts against the lower side surface 211 of the head 21, and the second flat plate 33 abuts against the outer surface 11 of the cover plate 1, so that the forces on the head 21 and the cover plate 1 are more uniform, thereby improving the tuning accuracy of the adjusting screw assembly 100 and preventing the wave spring 3 from deforming laterally when being compressed under force.

[0051] Please refer to Figure 8 、 Figure 10 and Figures 12 to 13 , the lower side surface 211 of the head 21 of the adjusting screw 2 further has a limiting groove 23. One end of the wave spring 3 elastically abuts against the outer surface 11 of the cover plate 1, and the other end of the wave spring 3 elastically abuts within the limiting groove 23. Specifically, the limiting groove 23 is recessed in the lower side surface 211 of the head 21 of the adjusting screw 2, and the limiting groove 23 is disposed around the outer periphery of the connection between the rod portion 22 and the lower side surface 211. When the adjusting screw 2 is rotationally engaged and connected with the first through hole 101, the first flat plate 32 and at least part of the annular elastic pieces 31 are located within the limiting groove 23 to limit the wave spring 3 from deforming laterally when being compressed under force, further improving the tuning accuracy of the adjusting screw assembly 100.

[0052] In this embodiment, the inner wall of the first through hole 101 is provided with an internal thread, and the rod portion 22 of the adjusting screw 2 is provided with an external thread 221. The rod portion 22 is threadedly connected to the inner wall of the first through hole 101. Further, the adjusting screw 2 and the cover plate 1 can be self-locked at any position when they are rotationally engaged, which is beneficial to stabilizing the adjusting screw 2, thereby improving the tuning effect of the adjusting screw 2. In other embodiments, the adjusting screw 2 and the cover plate 1 can also be engaged by a snap-fit method, which is not limited herein.

[0053] In this embodiment, the material of the adjusting screw 2 is one of iron, copper, aluminum, stainless steel, and aluminum alloy. Preferably, the material of the adjusting screw 2 is aluminum alloy. Compared with iron, copper, or aluminum, aluminum alloy has the advantages of high strength, light weight, and good anti-corrosion performance. The wave spring 3 in the present utility model is about 50% lighter than an ordinary adjusting screw 2. When an aluminum alloy wave spring 3 is used in combination, the weight reduction ratio will be higher, which is significantly helpful for the light weight of the product and further improves the product competitiveness.

[0054] Please refer to Figures 7 to 10, the present utility model also discloses a filter 200, which includes a tuning screw assembly 100, a body 4 and at least one resonant rod 5. The body 4 has a receiving cavity 40, the resonant rod 5 is disposed in the receiving cavity 40, the receiving cavity 40 has an opening, the resonant rod 5 has a resonant cavity 501, the resonant cavity 501 faces the opening, the resonant cavity 501 communicates with the receiving cavity 40, a cover plate 1 covers the opening, and the rod portion 22 of the tuning screw 2 sequentially passes through the wave spring 3 and the cover plate 1 and then extends into the resonant cavity 501. By providing a wave spring 3 between the tuning screw 2 and the cover plate 1, without the need to provide an adjusting nut, the tuning screw 2 and the cover plate 1 can achieve self-locking within an adjustable range through the tension of the wave spring 3 during rotational mating, thereby realizing the tuning of the filter 200, simplifying the assembly process, improving production efficiency, and reducing production costs.

[0055] The body 4 includes a bottom wall 41 and a side wall 42 vertically extending upward from the edge of the bottom wall 41. A receiving cavity 40 is formed between the side wall 42 and the bottom wall 41. The bottom wall 41 is provided with a boss 44, and the resonant rod 5 is fixed to the top of the boss 44 by a fastener so that the resonant rod 5 can be stably fixed to the bottom wall 41.

[0056] Please refer to Figure 2 , Figures 5 to 11 , there are at least two resonant rods 5, a wall body 43 is provided between the two resonant rods 5, the wall body 43 is respectively connected to the side wall 42 and the bottom wall 41, and the wall body 43 is connected to the side wall 42 and the bottom wall 41 to divide the receiving cavity 40 into at least two sub-receiving cavities 401, and each resonant rod 5 is disposed in each sub-receiving cavity 401. Preferably, the connection between the wall body 43 and the side wall 42 makes the cross-section of each sub-receiving cavity 401 pentagonal. In other embodiments, the cross-section of each sub-receiving cavity 401 can also be quadrilateral or hexagonal, which is not limited herein. With such a setting, the receiving cavity 40 of the body 4 can be divided into several independent sub-receiving cavities 401, and each resonant rod 5 is disposed in the sub-receiving cavity 401, thereby realizing cross-coupling, suppressing clutter, avoiding interference, and improving the tuning accuracy of the filter 200.

[0057] The wall body 43 is provided with a window 431, the cover plate 1 has a second through hole 102, the window 431 and the second through hole 102 are arranged vertically corresponding to each other, the rod portion 22 of the tuning screw 2 passes through the wave spring 3 and is rotatably connected with the hole wall of the second through hole 102, and at least part of the rod portion 22 is inserted into the window 431. By rotating the tuning screw 2, the tuning effect can also be achieved.

[0058] Please refer to Figures 9 to 14, the filter 200 further includes a flybar assembly 6. The flybar assembly 6 is disposed in the window 431. The flybar assembly 6 includes a card seat 61 and a flybar 62. The card seat 61 is clamped in the window 431. The card seat 61 has a top end 611 and a bottom end 612 which are oppositely arranged. The flybar 62 is clamped to the bottom end 612, and the opposite ends of the flybar 62 face two adjacent resonant elements respectively to suppress clutter. The top end 611 of the card seat 61 has a connection hole 601. The rod portion 22 of the adjusting screw 2 passes through the second through hole 102 and is connected to the connection hole 601 to fix the card seat 61. In this embodiment, the wall body 43 includes guide rails 432 which are oppositely arranged and extend vertically. The two guide rails 432 and the wall body 43 form the window 431. The card seat 61 is provided with guide grooves 613 which cooperate with the guide rails 432 to provide a guiding function. That is, the flybar assembly 6 moves up and down relative to the wall body 43 in the window 431. When the rod portion 22 of the adjusting screw 2 passes through the second through hole 102 and is connected to the connection hole 601, by using a screwdriver to rotate the adjusting screw 2, the flybar 62 can move up and down in the window 431 along with the card seat 61, so as to be able to change the relative positional relationship between the flybar 62 and the two resonant rods 5, and further change the capacitive coupling amount between the two resonant rods 5.

[0059] In summary, the present utility model discloses an adjusting screw assembly 100. The adjusting structure includes a cover plate 1, an adjusting screw 2 and a waveform spring 3. The cover plate 1 has a first through hole 101. The adjusting screw 2 includes a head 21 and a rod portion 22 integrally arranged with the lower side surface 211 of the head 21. The rod portion 22 is movably arranged in the first through hole 101. By sleeving the waveform spring 3 on the rod portion 22 of the adjusting screw 2, one end of the waveform spring 3 elastically abuts against the outer surface 11 of the cover plate 1, and the other end of the waveform spring 3 elastically abuts against the lower side surface 211 of the head 21 of the adjusting screw 2. When the rod portion 22 of the adjusting screw 2 rotates and cooperates with the hole wall of the first through hole 101, the rod portion 22 of the adjusting screw 2 and the cover plate 1 can be locked within an adjustable range by the tension of the waveform spring 3, which simplifies the installation process, improves the assembly efficiency and reduces the cost.

[0060] It should be understood that the terms such as "first", "second" and similar words used in the description and claims of the present utility model do not indicate any order, quantity or importance, but are only used to distinguish the named features. Similarly, words such as "a" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Unless otherwise specified, the similar words such as "front", "rear", "upper", "lower" etc. appearing in the present utility model are only for convenience of description and are not limited to a specific position or a spatial orientation. The expression "comprising" or "including" and similar words is an open-ended expression, meaning that the elements appearing before "comprising" or "including" cover the elements appearing after "comprising" or "including" and their equivalents, and this does not exclude that the elements appearing before "comprising" or "including" may further include other elements. If "several" appears in the present utility model, it means two or more.

[0061] The above embodiments are only used to illustrate rather than limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art of the relevant technical field. For example, for the description of directions such as "front", "rear", "left", "right", "upper", "lower", etc., although this specification has described the present utility model in detail with reference to the above embodiments, however, those of ordinary skill in the art should understand that those skilled in the relevant technical field can still modify the present utility model or make equivalent substitutions, and all technical solutions and their improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A screw adjustment assembly, characterized in that: include: A cover plate (1) having a first through hole (101); An adjusting screw (2) comprising a head (21) and a rod (22) integrally arranged with a lower side surface (211) of the head (21), wherein the rod (22) is movably arranged in the first through hole (101) and rotatably matched with a hole wall of the first through hole (101); A wave spring (3) is sleeved on the rod (22), one end of the wave spring (3) elastically abuts against the outer surface (11) of the cover plate (1), and the other end of the wave spring (3) elastically abuts against the lower side (211) of the head (21), and the rod (22) of the adjusting screw (2) and the cover plate (1) can be locked within an adjustable range through the tension of the wave spring (3).

2. The screw adjustment assembly according to claim 1, characterized in that: The wave spring (3) is a flat-top wave spring, and the material of the flat-top wave spring is one of iron, copper, aluminum, stainless steel, and aluminum alloy.

3. The screw adjustment assembly according to claim 2, characterized in that: The wave spring (3) comprises a plurality of annular spring pieces (31) in a wave shape that rises and falls, the plurality of annular spring pieces (31) being connected end to end in a stacked shape, each of the annular spring pieces (31) having a wave crest portion (311) and a wave trough portion (312) that are staggered up and down, and the wave crest portion (311) of the annular spring piece (31) is in contact with the wave trough portion (312) of an adjacent annular spring piece (31) in a vertical direction.

4. The screw adjustment assembly according to claim 1, characterized in that: The lower side of the head (21) of the adjusting screw (2) has a limiting groove (23), one end of the wave spring (3) elastically abuts against the outer surface (11) of the cover plate (1), and the other end of the wave spring (3) elastically abuts within the limiting groove (23).

5. The screw adjustment assembly according to claim 1, characterized in that: The material of the adjusting screw (2) is one of iron, copper, aluminum, stainless steel and aluminum alloy.

6. The screw adjustment assembly according to claim 1, characterized in that: The hole wall of the first through hole (101) is provided with an internal thread, the rod portion (22) of the adjusting screw (2) is provided with an external thread (221), and the rod portion (22) is threadedly connected to the hole wall of the first through hole (101).

7. A filter, characterized in that: The filter comprises the adjusting screw assembly according to any one of claims 1 to 6, and the filter further comprises a body (4) and at least one resonant rod (5), the body (4) having a housing cavity (40), the resonant rod (5) being arranged in the housing cavity (40), the housing cavity (40) having an opening, the cover plate (1) covering the opening, the resonant rod (5) having a resonant cavity (501), the resonant cavity (501) facing the opening, the resonant cavity (501) being communicated with the housing cavity (40), the rod portion (22) of the adjusting screw (2) sequentially passing through the wave spring (3) and the cover plate (1) and then extending into the resonant cavity (501).

8. The filter according to claim 7, characterized in that: The main body (4) comprises a bottom wall (41) and a side wall (42) extending vertically upward from the edge of the bottom wall (41), wherein the bottom wall (41) and the side wall (42) form the accommodating cavity (40); the main body (4) further comprises a wall (43), wherein the wall (43) is arranged in the accommodating cavity (40), and the wall (43) is respectively connected to the side wall (42) and the bottom wall (41) to divide the accommodating cavity (40) into at least two sub-accommodating cavities (401), and each of the sub-accommodating cavities (401) accommodates one of the resonant rods (5).

9. The filter according to claim 8, characterized in that: The wall (43) is provided with a window (431), the cover plate (1) has a second through hole (102), the window (431) and the second through hole (102) are arranged correspondingly up and down, the rod portion (22) of the adjusting screw (2) passes through the wave spring (3) and is rotatably matched with the hole wall of the second through hole (102), and at least a part of the rod portion (22) is inserted into the window (431).

10. The filter according to claim 9, characterized in that: The filter further comprises a flying rod assembly (6), wherein the flying rod assembly (6) is arranged in the window (431), and the flying rod assembly (6) comprises a clamping seat (61) and a flying rod (62), wherein the clamping seat (61) is clamped in the window (431), the clamping seat (61) has a top end (611) and a bottom end (612) which are arranged opposite to each other, the flying rod (62) is clamped in the bottom end (612), the top end of the clamping seat (61) has a connecting hole (601), and the rod portion (22) of the adjusting screw (2) passes through the second through hole (102) and is connected to the connecting hole (601).

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