Tunable screw structure and filter

Abstract

The utility model discloses a kind of screw adjusting structure and filter.A kind of screw adjusting structure includes cover plate and tuning screw rod.The cover plate is equipped with multiple through holes, multiple the tuning screw rod is set one-to-one with multiple through holes.Corresponding setting is set in each the tuning screw rod with the cavity that the tuning screw rod surface is communicated.The other end of the adjusting screw rod is set in the cover plate through the through hole, the adjusting screw rod is rotatably connected with the through hole.Such can reduce the overall weight of filter while improving the heat dissipation performance of filter.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment, and in particular to a screw adjustment structure and a filter. Background Technology

[0002] In existing technologies, cavity filters have become a crucial component of wireless communication. A typical cavity filter consists of input / output ports, a cavity, a resonator, a cover plate, and tuning screw assemblies. The tuning screw assembly allows for fine-tuning of the cavity filter to change the frequency. However, currently, tuning screws in the industry are made of solid material. Using a large number of tuning screws on a single filter increases the overall weight of the filter, and solid tuning screws also have poor heat dissipation performance.

[0003] Therefore, it is necessary to provide a tuning screw structure and filter to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a screw-adjusting structure and filter that reduces the overall weight of the filter while improving its heat dissipation performance.

[0005] To achieve the above objectives, this utility model adopts the following technical solution one:

[0006] A screw-adjusting structure, comprising:

[0007] A cover plate, wherein the cover plate is provided with multiple through holes;

[0008] A tuning screw is provided, with multiple tuning screws corresponding to multiple through holes. Each tuning screw has a cavity inside, and one side of the cavity has an opening communicating with the surface of the tuning screw. The tuning screw passes through the through hole and is disposed on the cover plate. The tuning screw and the through hole are rotatably connected.

[0009] Furthermore, the tuning screw includes an integrally formed first end and a second end, the outer wall diameter of the first end is larger than the outer wall diameter of the second end, the cavity passes through the first end and the second end, and the outer wall of the first end is threadedly connected to the hole wall of the through hole.

[0010] Furthermore, a connecting portion is provided between the first end and the second end, the connecting portion having an annular connecting surface, and the angle between the connecting surface and the outer wall of the first end being 0-90°.

[0011] Furthermore, the adjusting screw structure also includes a nut, which is disposed on the top of the cover plate, and the outer wall of the first end is threadedly connected to the nut.

[0012] Furthermore, the inner wall diameter of the cavity is 1.8–2.8 mm.

[0013] Furthermore, the tuning screw is made of one of the following materials: metal, plastic, or ceramic.

[0014] Furthermore, the surface of the tuning screw is provided with a metal electroplating layer.

[0015] Furthermore, a bit groove is provided around the opening.

[0016] Furthermore, the inner wall of the cavity is a smooth surface, and the cavity is formed by deep drawing, die casting, or injection molding.

[0017] To achieve the above objectives, this utility model adopts the following technical solution two:

[0018] A filter comprising the tuning screw structure described above.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model discloses a tuning screw structure, comprising a cover plate and tuning screws. The cover plate has multiple through holes, with multiple tuning screws corresponding to each through hole. Each tuning screw has a cavity, and one side of the cavity has an opening communicating with the surface of the tuning screw. The tuning screw passes through the through holes and is mounted on the cover plate, with the tuning screw rotatably engaging with the through holes. When multiple tuning screws are mounted on the cover plate, the hollow design of the tuning screws disclosed in this utility model reduces the overall weight and material costs. It also improves the heat dissipation performance of the tuning screws. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the filter of this utility model;

[0022] Figure 2 yes Figure 1 A three-dimensional exploded view;

[0023] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0024] Figure 4 yes Figure 2 A magnified view of part B in the middle section;

[0025] Figure 5 yes Figure 1 Top view;

[0026] Figure 6 yes Figure 5 A partially enlarged view of the cross-sectional schematic diagram along the CC axis;

[0027] Figure 7 yes Figure 5 A partially enlarged view of the cross-sectional schematic diagram along the middle DD;

[0028] Figure 8 This is a cross-sectional schematic diagram of one type of tuning screw in this utility model;

[0029] Figure 9 This is a cross-sectional schematic diagram of another type of tuning screw in this utility model;

[0030] Figure 10 This is a three-dimensional schematic diagram of the tuning screw in this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Adjusting screw structure; 1. Cover plate; 101. Through hole; 102. Second through hole; 2. Adjusting screw; 201. Cavity; 202. Opening; 203. Bit groove; 21. First end; 211. Recess; 204. Through groove; 22. Second end; 23. Connecting part; 231. Connecting surface; 24. Screw; 25. Head; 26. Tail; 3. Nut;

[0033] 200, Filter; 210, Body; 2001, Receiving cavity; 2002, Mounting port; 2003, Wall; 2004, Window; 220, Resonant rod; 230, Screw. Detailed Implementation

[0034] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. If several embodiments exist, features in these embodiments may be combined with each other without conflict. When the description refers to the drawings, unless otherwise stated, the same numbers in different drawings represent the same or similar elements. The descriptions in the following exemplary embodiments do not represent all embodiments consistent with the present invention; rather, they are merely examples of apparatuses, products, and / or methods consistent with some aspects of the present invention as set forth in the claims.

[0035] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of protection of this invention. The singular forms “a,” “the,” or “the” used in the specification and claims of this invention are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0036] Please refer to Figures 1 to 10This utility model discloses a tuning screw structure 100, which includes a cover plate 1 and a tuning screw 2. The cover plate 1 has multiple through holes 101, and multiple tuning screws 2 are correspondingly arranged in one-to-one correspondence with the multiple through holes 101. Each tuning screw 2 has a cavity 201, and one side of the cavity 201 has an opening 202 communicating with the surface of the tuning screw 2. The tuning screw 2 passes through the through holes 101 and is mounted on the cover plate 1, with the tuning screw 2 rotatably engaged with the through holes 101. When multiple tuning screws 2 disclosed in this application are mounted on the cover plate 1, the overall weight can be reduced, lowering material costs. It also improves the heat dissipation performance of the tuning screw 2.

[0037] Please refer to Figures 6 to 9 In one embodiment, the tuning screw 2 includes an integrally formed first end 21 and second end 22, wherein the outer wall diameter d1 of the first end 21 is larger than the outer wall diameter d2 of the second end 22. A cavity 201 passes through the first end 21 and the second end 22, and a bit groove 203 is located at the top of the first end 21. The outer wall of the first end 21 is rotatably engaged with the wall of the through hole 101. A connecting portion 23 is also provided between the first end 21 and the second end 22. The connecting portion 23 has an annular connecting surface 231, and the included angle α between the connecting surface 231 and the outer wall of the first end 21 is 0–90°. Specifically, the outer wall of the first end 21 of the tuning screw 2 has external threads, the wall of the through hole 101 has internal threads, the outer wall of the first end 21 is threadedly engaged with the wall of the through hole 101, and the second end 22 has a smooth outer wall. Viewed radially perpendicular to the central axis of the tuning screw 2, the first end 21, the connecting portion 23, and the second end 22 are arranged in concentric circles, and their projections on the central axis of the tuning screw 2 do not overlap. One side of the connecting surface 231 is connected to the outer wall of the first end 21, and the other side is connected to the outer wall of the second end 22. The angle α between the extended surface of the connecting surface 231 towards the first end 21 and the outer wall of the first end 21 is 0 to 90°. By providing the second end 22 and the connecting portion 23, the tuning screw 2 can pass through the through hole 101 of the cover plate 1 more smoothly and is less likely to jam against the cover plate 1. Preferably, the angle α between the extended surface of the connecting surface 231 towards the first end 21 and the outer wall of the first end 21 is 45°.

[0038] Please refer to Figure 3 and 6 to Figure 7 The tuning screw structure 100 also includes a nut 3, which has an internal thread and is located on the top of the cover plate 1. When the second end 22 passes through the nut 3 and the cover plate 1, the external thread of the first end 21 is threadedly connected to the internal thread of the nut 3 to adjust the position of the tuning screw 2 on the cover plate 1, thereby improving the stability of the tuning screw 2 when tuning on the cover plate 1.

[0039] Please refer to Figures 8 to 9 Specifically, the inner wall diameter of cavity 201 is 1.8–2.8 mm. In the first embodiment, the tuning screw 2 is machined from an M8 screw, with the outer diameter d1 of the first end 21 being 8 mm, the outer diameter d2 of the second end 22 being 6.5 ± 0.05 mm, and the inner wall diameter d3 of cavity 201 being 2.8 mm. In the second embodiment, the tuning screw 2 is machined from an M6 screw, with the outer diameter d1 of the first end 21 being 8 mm, the outer diameter d2 of the second end 22 being 5.0 ± 0.05 mm, and the inner wall diameter d3 of cavity 201 being 2.8 mm.

[0040] Please refer to Figure 7 and Figure 9 In another embodiment, the tuning screw 2 is a screw 24 with a uniform outer diameter. The outer diameter of the screw 24 is provided with an external thread, which is threaded into the wall of the through hole 101. The screw 24 includes a head 25 and a tail 26, and has a cavity 201 inside. One side of the cavity 201 has an opening 202 communicating with the surface of the head 25 of the tuning screw 24. The tail 26 of the screw 24 passes through the through hole 101, and the external thread of the screw 24 is threaded into the wall of the through hole 101.

[0041] Specifically, when the tuning screw 2 is machined using an M8 screw, the outer diameter d4 of the screw 24 is 8 mm, and the inner wall diameter d5 of the cavity 201 is 2.8 mm. When the tuning screw 2 is machined using an M6 screw, the outer diameter d4 of the screw 24 is 6 mm, and the inner wall diameter d5 of the cavity 201 is 2.8 mm. When the tuning screw 2 is machined using an M4 screw, the outer diameter d4 of the screw 24 is 4 mm, and the inner wall diameter d5 of the cavity 201 is 1.8 mm. By machining tuning screws 2 with cavities 201 using screws of different specifications, the weight of the tuning screw 2 can be reduced, while the heat dissipation performance of the tuning screw 2 can be improved.

[0042] The tuning screw 2 is made of metal, plastic, or ceramic. The inner wall of the cavity 201 is smooth. The cavity 201 of the tuning screw 2 is formed by deep drawing, die casting, or injection molding, resulting in a smooth inner wall. Specifically, when the tuning screw 2 is made of metal, the cavity 201 is formed by deep drawing. During deep drawing, the metal flow lines are distributed along the contour of the cavity 201 wall, making the inner wall of the cavity 201 more continuous, uniform, and smooth. The proper distribution of metal flow lines helps improve the fatigue resistance and strength of the tuning screw 2, allowing it to better transmit stress when bearing loads.

[0043] Of course, the metal tuning screw 2 is formed by die casting, which allows the fibrous structure of the metal material to be preserved and distributed more reasonably, and the inner wall of the cavity 201 to be smooth, thereby improving the mechanical properties of the tuning screw 2. The tuning screw 2 has better strength, toughness and fatigue resistance.

[0044] When the tuning screw 2 is made of plastic, its cavity 201 is formed by injection molding. During the molding process, the material of the tuning screw 2 undergoes plastic deformation under the action of the mold, resulting in a denser internal structure and finer grains. This also enables photovoltaics on the inner wall of the cavity 201, further enhancing the strength and hardness of the tuning screw 2 and compensating to some extent for the strength loss caused by the thinning of the wall thickness.

[0045] In the embodiments of this application, the surface of the tuning screw 2 is provided with a metal electroplating layer, which can improve the wear resistance of the tuning screw 2, enhance the corrosion resistance of the tuning screw 2, and further improve the hardness and strength of the tuning screw 2.

[0046] Please refer to Figures 8 to 10 A bit groove 203 is provided around the opening 202. Specifically, the top center of the first end 21 has a recess 211, and the bit groove 203 is disposed in the recess 211. The center of the recess 211 has a through groove 204, which communicates with the opening 202 on one side of the cavity 201. The bit groove 203 is arranged around the through groove 204 and is configured to position with an external workpiece, so that the tuning screw 2 can be locked by the external workpiece, and the position of the tuning screw 2 on the cover plate 1 can be adjusted. In the embodiments of this application, the bit groove 203 of the tuning screw 2 is one of the following: hexagonal, cross-shaped, or straight-line shaped, and is not limited here.

[0047] This utility model also discloses a filter 200. The filter 200 includes a body 210, multiple resonant rods 220, and a tuning screw structure 100. The body 210 has a receiving cavity 2001, in which multiple resonant rods 220 are disposed. One side of the receiving cavity 2001 has a mounting port 2002, which is covered by a cover plate 1. Several through holes 101 are correspondingly arranged with the resonant rods 220 in the receiving cavity 2001. Preferably, the resonant rods 220 are fixed to the bottom of the body 210 by screws 230. The tuning screws 2 pass through the nut 3 and the through holes 101 and extend into the resonant rods 220. Typically, a filter 200 is equipped with 400 to 1000 tuning screws 2, while a more precise and complex filter 200 may have 2000 to 3000 tuning screws 2. By assembling the tuning screws 2 of this application, the overall weight of the filter 200 can be reduced, while the heat dissipation performance of the filter 200 can also be improved.

[0048] A wall 2003 is provided between two adjacent resonant rods 220. A window 2004 is provided on the wall 2003, facing the cover plate 1. The cover plate 1 also has a second through hole 102. The window 2004 and the second through hole 102 are vertically aligned. At least a portion of the tuning screw 2 passes through the nut 3 and the second through hole 102, extending into the window 2004. By using the tuning screw 2 with a cavity 201 as described in this application, the overall weight of the filter 200 is reduced, while the heat dissipation performance of the filter 200 is improved.

[0049] In summary, this utility model discloses a tuning screw structure 100, comprising a cover plate 1 and tuning screws 2. The cover plate 1 has multiple through holes 101, and multiple tuning screws 2 are correspondingly arranged with each through hole 101. Each tuning screw 2 has a cavity 201, and one side of the cavity 201 has an opening 202 communicating with the surface of the tuning screw 2. The tuning screw 2 passes through the through holes 101 and is mounted on the cover plate 1, with the tuning screw 2 rotatably engaging with the through holes 101. When multiple tuning screws 2 are mounted on the cover plate 1, the hollow tuning screws 2 disclosed in this utility model reduce the overall weight and material costs. It also improves the heat dissipation performance of the tuning screws 2.

[0050] It should be understood that the terms "first," "second," and similar words used in the specification and claims of this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish the features. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise stated, the terms "before," "after," "upper," "lower," and similar words appearing in this utility model are for ease of explanation only and are not limited to a specific location or spatial orientation. The terms "comprising" or "including" are an open-ended expression, meaning that the element preceding "comprising" or "including" covers the element following "comprising" or "including" and its equivalents, which does not exclude that the element preceding "comprising" or "including" may also include other elements. In this utility model, the word "several" means two or more.

[0051] The above embodiments are only for illustration and not for limiting the technical solutions described in this utility model. The understanding of this specification should be based on those skilled in the art. For example, the directional descriptions such as "front", "back", "left", "right", "up", and "down" are important. Although this specification has described the present invention in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this utility model. All technical solutions and improvements that do not depart from the spirit and scope of this utility model should be covered within the scope of the claims of this utility model.

Claims

1. A screw-adjusting structure, characterized in that, include: Cover plate (1), wherein the cover plate (1) is provided with a plurality of through holes (101); A tuning screw (2) is provided, with multiple tuning screws (2) corresponding to multiple through holes (101). Each tuning screw (2) has a cavity (201) inside, and one side of the cavity (201) has an opening (202) communicating with the surface of the tuning screw (2). The tuning screw (2) passes through the through hole (101) and is disposed on the cover plate (1). The tuning screw (2) and the through hole (101) are rotatably connected.

2. The adjusting screw structure as described in claim 1, characterized in that: The tuning screw (2) includes an integrally formed first end (21) and second end (22). The outer wall diameter of the first end (21) is larger than the outer wall diameter of the second end (22). The cavity (201) passes through the first end (21) and the second end (22). The outer wall of the first end (21) is threadedly connected to the hole wall of the through hole (101).

3. The adjusting screw structure as described in claim 2, characterized in that: A connecting portion (23) is provided between the first end (21) and the second end (22). The connecting portion (23) has an annular connecting surface (231). The angle (α) between the connecting surface (231) and the outer wall of the first end (21) is 0-90°.

4. The adjusting screw structure as described in claim 2, characterized in that: The adjusting screw structure also includes a nut (3), which is disposed on the top of the cover plate (1), and the outer wall of the first end (21) is threadedly connected to the nut (3).

5. The adjusting screw structure as described in claim 1, characterized in that: The inner wall diameter of the cavity (201) is 1.8 to 2.8 mm.

6. The adjusting screw structure as described in claim 1, characterized in that: The tuning screw (2) is made of one of the following materials: metal, plastic, or ceramic.

7. The adjusting screw structure as described in claim 1, characterized in that: The surface of the tuning screw (2) is provided with a metal electroplating layer.

8. The adjusting screw structure as described in claim 1, characterized in that: The opening (202) is surrounded by a bit groove (203).

9. The adjusting screw structure as described in claim 1, characterized in that: The inner wall of the cavity (201) is a smooth surface, and the cavity (201) is formed by deep drawing, die casting or injection molding.

10. A filter, characterized in that: The filter includes the tuning screw structure as described in any one of claims 1-9.

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