Resonant bar and method for manufacturing a resonant bar

Abstract

A kind of resonance rod includes body stem, resonance disc part and coupling surface part.The body stem has top end and bottom end oppositely arranged in the vertical direction of its extension, and the body stem is provided with inner cavity between top end and bottom end.The resonance disc part is integrally formed on the top end of the body stem.The coupling surface part is integrally formed on the bottom end of the body stem.The body stem includes first outer wall surface facing away from the inner cavity in the first direction, and the coupling surface part includes second outer wall surface facing away from the inner cavity in the second direction perpendicular to the first direction, and the first outer wall surface and the second outer wall surface have first connecting camber surface between them.The inner cavity has central axis extending in the vertical direction, and in the vertical section along the central axis, the wall thickness T of the body stem is 0.5mm-1mm, and the arc length R1 of the first connecting camber surface is not more than 0.25mm.The present application also relates to a manufacturing method of resonance rod.The present application has better coupling effect, simple manufacturing process, improved precision and reduced cost.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a resonant rod and a method for manufacturing the resonant rod. Background Technology

[0002] The resonant rod is a crucial component in filter products, and its diameter and fillet radius directly affect the product's performance. Metal resonant rod manufacturing processes generally fall into two categories: cold heading and deep drawing. In conventional deep drawing, the fillet radius is typically no less than the plate thickness; however, for filter products, the fillet radius of critical areas is closely related to product performance. Existing resonant rod products suffer from long manufacturing times, high costs, and relatively poor performance.

[0003] Therefore, it is necessary to provide a resonant rod and a method for manufacturing the resonant rod to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a resonant rod and a method for manufacturing the resonant rod, which aims to improve product design accuracy while reducing product cost.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a resonant rod, the resonant rod comprising: a main body rod having a top end and a bottom end disposed opposite to each other in its extending vertical direction, the main body rod having an inner cavity located between the top end and the bottom end; a resonant disk integrally formed on the top end of the main body rod; and a coupling surface integrally formed on the bottom end of the main body rod; the main body rod includes a first outer wall surface facing away from the inner cavity in a first direction, the coupling surface includes a second outer wall surface facing away from the inner cavity in a second direction perpendicular to the first direction, a first connecting arc surface being formed between the first outer wall surface and the second outer wall surface; and the inner cavity has a central axis extending in a vertical direction, and in a vertical cross-section along the central axis, the wall thickness T of the main body rod is 0.5mm to 1mm, and the arc length R1 of the first connecting arc surface is not greater than 0.25mm.

[0006] As a further improved technical solution of the present invention, the resonant rod also includes a mounting surface received in the inner cavity. The mounting surface and the coupling surface are connected by a connecting part. The mounting surface and the coupling surface extend in two planes arranged vertically and horizontally. The two planes are perpendicular to the central axis and parallel to each other.

[0007] As a further improvement of the present invention, the mounting surface is provided with a mounting hole, and the center of the mounting hole is located on the central axis.

[0008] As a further improvement of the present invention, the connecting part includes at least an inclined connecting part connected to the coupling face.

[0009] As a first further improved technical solution of the present invention, the connecting portion further includes a vertical connecting portion connected to the mounting surface portion.

[0010] As a first further improved technical solution of the present invention, an outer cavity is formed among the mounting surface portion, the inclined connecting portion, and the vertical connecting portion. The inner cavity and the outer cavity are separated by the mounting surface portion, the inclined connecting portion, and the vertical connecting portion, and are connected through the mounting hole.

[0011] As a first further improved technical solution of the present invention, the inclined connecting portion includes a third outer wall surface facing the outer cavity. There is a second connecting arc surface between the second outer wall surface and the third outer wall surface. In the vertical section along the central axis, the arc length R2 of the second connecting arc surface is 0.7 mm to 0.9 mm.

[0012] As a first further improved technical solution of the present invention, the vertical connecting portion includes a fourth outer wall surface facing the outer cavity. There is a third connecting arc surface between the third outer wall surface and the fourth outer wall surface. In the vertical section along the central axis, the arc length R3 of the third connecting arc surface is 0.7 mm to 0.9 mm.

[0013] As a first further improved technical solution of the present invention, the vertical connecting portion includes a fourth inner wall surface facing the inner cavity, and the mounting surface portion includes a fifth inner wall surface facing the inner cavity. There is a fourth connecting arc surface between the fourth inner wall surface and the fifth inner wall surface. In the vertical section along the central axis, the arc length R4 of the fourth connecting arc surface is 0.7 mm to 0.9 mm.

[0014] To achieve the above object, the present invention adopts the following technical solution two: A manufacturing method of a resonant rod, including the following steps:

[0015] Step one: The flat metal sheet is first pressed downward to form a "prototype of the resonant rod". The "prototype of the resonant rod" has a first inner cavity, and the cross-section of the first inner cavity along its central axis has a first width W1 and a first height H1.

[0016] Step two: On the basis of the "prototype of the resonant rod", it is pressed downward a second time to form a "first deformation of the resonant rod". The "first deformation of the resonant rod" has a second inner cavity, and the cross-section of the second inner cavity along its central axis has a second width W2 and a second height H2, where W1 > W2 and H1 < H2.

[0017] Step 3: Based on the "first deformation of the resonant rod", perform the third stamping upward in the reverse direction to form the "second deformation of the resonant rod". The "second deformation of the resonant rod" causes the resonant rod to form a mounting surface. Inside the second inner cavity, the mounting surface has a third height H3, and H3 < H2; and

[0018] Step 4: Based on the "second deformation of the resonant rod", perform the fourth stamping upward in the reverse direction to form the "final form of the resonant rod". The "final form of the resonant rod" means that a mounting hole is formed on the mounting surface and the resonant rod has small rounded corners, and the small rounded corners are the first connecting arc surfaces described in Claim 1.

[0019] Compared with the prior art, for the resonant rod of the present invention, based on the wall thickness T of the main body rod portion being 0.5 mm to 1 mm, the arc length R1 of the first connecting arc surface is designed to be not greater than 0.25 mm through the deep drawing process. Therefore, the coupling area between the resonant rod of the present invention and the cavity remains unchanged, and the overall elasticity of the part becomes larger, resulting in a better coupling effect in terms of product indicators; moreover, the manufacturing method of the resonant rod of the present invention is relatively simple, can be continuously completed through a set of deep drawing dies, and no additional processes are required. The present invention improves the precision and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional view of the resonant rod of the present invention;

[0021] Figure 2 is a three-dimensional view of the resonant rod of the present invention from another angle;

[0022] Figure 3 is a top view of the resonant rod of the present invention; s]]

[0023] Figure 4 is a cross-sectional view taken along Figure 3 line A-A in

[0024] Figure 5 is Figure 4 an enlarged view of part B in

[0025] Figure 6 is Figure 4 an enlarged view of part C in

[0026] Figure 7 is Figure 4 an enlarged view of part D in

[0027] Figure 8 is Figure 4 an enlarged view of part E in

[0028] Figure 9 is a process flow chart of the resonant rod of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] 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.

[0030] 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” as used in the specification and claims of this invention are also intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should be understood that the terms "first," "second," and similar words used in the specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish 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 invention 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" encompasses the element following "comprising" or "including" and its equivalents, but this does not preclude the element preceding "comprising" or "including" from also including other elements. In this invention, the term "several" means two or more.

[0032] Please refer to Figures 1 to 8 This invention relates to a resonant rod, which includes a main body rod portion 1, a resonant disk portion 2, a coupling surface portion 3, a mounting surface portion 4, and a connecting portion 5. The mounting surface portion 4 is used to fix a metal sheet (not shown) within a filter (not shown) relative to the resonant rod using insulating fasteners (not shown), such that the metal sheet is parallel to the disk surface of the resonant disk portion 2. The connecting portion 5 is located between the coupling surface portion 3 and the mounting surface portion 4.

[0033] Please refer to Figures 1 to 4The main body rod 1 has a top end and a bottom end that are arranged oppositely in its extending vertical direction, and an inner cavity 10 is provided inside the main body rod 1 between the top end and the bottom end. The resonant disk 2 is integrally formed on the top end of the main body rod 1 and is used to receive external signals; the coupling surface 3 is integrally formed on the bottom end of the main body rod 1 and is used to couple with the metal sheet.

[0034] Please refer to Figures 1 to 6 The main body rod 1 includes a first outer wall surface 101 facing away from the inner cavity 10 in a first direction, and the coupling surface 3 includes a second outer wall surface 301 facing away from the inner cavity 10 in a second direction perpendicular to the first direction. It can be understood that the first direction is... Figure 4 The horizontally extending X direction is also commonly referred to as the lateral direction; the second direction is... Figure 4 The vertically extending Y direction is also commonly referred to as the vertical direction. A first connecting arc surface exists between the first outer wall surface 101 and the second outer wall surface 301; and the inner cavity 10 has a vertically extending central axis 100. On the vertical cross-section along the central axis 100, the wall thickness T of the main body rod 1 is 0.5mm to 1mm, and the arc length R1 of the first connecting arc surface is no greater than 0.25mm. The resonant rod of this invention, based on the wall thickness T of the main body rod being 0.5mm to 1mm, uses the deep drawing process of this invention to design the arc length R1 of the first connecting arc surface to be no greater than 0.25mm. Therefore, the coupling area between the resonant rod and the cavity remains unchanged, the overall elasticity of the part increases, and from a product performance perspective, there will be a better coupling effect. That is, the resonant rod of this invention is based on a conventional design with a further improved small rounded corner design of the coupling surface, achieving the beneficial effect of a smaller R1 value and a larger Q value (Qfactor). Furthermore, the manufacturing method of the resonant rod of this invention is relatively simple, completed continuously through a set of deep drawing dies without additional processes.

[0035] Please refer to Figure 4 The resonant rod also includes a mounting surface 4 housed within the inner cavity 10. The mounting surface 4 and the coupling surface 3 extend in two vertically arranged planes, which are perpendicular to the central axis 100 and parallel to each other. Furthermore, the mounting surface 4 is provided with a mounting hole 40, the center of which is located on the central axis 100, to ensure the installation accuracy of the resonant rod in the filter product.

[0036] Please refer to Figure 4The resonant rod further includes a connecting portion 5 located between the coupling surface 3 and the mounting surface 4. In some embodiments, the connecting portion 5 includes at least an inclined connecting portion 51 connected to the coupling surface 3; in specific embodiments, in addition to the inclined connecting portion 51, the connecting portion 5 also includes a vertical connecting portion 52 connected to the mounting surface 4. The inclined connecting portion 51 is called "inclined" because its extension surface has an angle of 0 to 90 degrees with the horizontal plane where the mounting surface 4 is located; the vertical connecting portion 52 is called "vertical" because its extension surface has an angle of 90 degrees with the horizontal plane where the mounting surface 4 is located. Therefore, Figure 4 In the specific embodiment shown, the mounting surface 4, the inclined connecting portion 51, and the vertical connecting portion 52 form a generally trumpet-shaped outer cavity 50. The inner cavity 10 and the outer cavity 50 are separated by the mounting surface 4, the inclined connecting portion 51, and the vertical connecting portion 52, and are connected through the mounting hole 40.

[0037] Please refer to Figure 4 and Figure 6 The inclined connecting part 51 includes a third outer wall surface 511 facing the outer cavity 50. The second outer wall surface 301 and the third outer wall surface 511 have a second connecting arc surface. On the vertical section along the central axis 100, the arc length R2 of the second connecting arc surface is 0.7mm to 0.9mm.

[0038] Please refer to Figure 4 and Figure 7 The vertical connecting part 52 includes a fourth outer wall surface 521 facing the outer cavity 50. The third outer wall surface 511 and the fourth outer wall surface 521 have a third connecting arc surface. On the vertical section along the central axis 100, the arc length R3 of the third connecting arc surface is 0.7mm to 0.9mm.

[0039] Please refer to Figure 4 and Figure 8 The vertical connecting part 52 includes a fourth inner wall surface 522 facing the inner cavity 10, and the mounting part 4 includes a fifth inner wall surface 42 facing the inner cavity 10. A fourth connecting arc surface is provided between the fourth inner wall surface 522 and the fifth inner wall surface 42. On the vertical section along the central axis 100, the arc length R4 of the fourth connecting arc surface is 0.7mm to 0.9mm.

[0040] Figure 6 , Figure 7 , Figure 8R2, R3, and R4 shown respectively therein have dimensions consistent with conventional processes, that is, 0.7 mm to 0.9 mm is a conventional design; however, Figure 6 The dimension of R1 shown therein, compared with the wall thickness T (0.5 mm to 1 mm) of the body rod portion 1, for example: when T is a certain value 0.8 mm in the middle of 0.5 mm to 1 mm and R1 is the maximum value 0.25 mm, 0.25 mm is much smaller than 0.8 mm; even when T is the minimum value 0.5 mm in 0.5 mm to 1 mm and R1 is the maximum value 0.25 mm, 0.25 mm is only half of 0.5 mm. Making the arc length R1 of the first connecting arc surface smaller relative to the wall thickness T through a deep drawing process is the key point of the present invention.

[0041] Of course, it can be understood that, please refer to Figures 4 to 8 , the mounting surface portion 4 further includes a fifth outer wall surface 41 facing the outer cavity 50; the body rod portion 1 further includes a first inner wall surface 102 facing the inner cavity 10, and the inclined connecting portion 51 includes a third inner wall surface 512 facing the inner cavity 10. Among them, the first outer wall surface 101, the second outer wall surface 301, the third outer wall surface 511, the fourth outer wall surface 521, and the fifth outer wall surface 41 are all flat surfaces, and the first inner wall surface 102, the third inner wall surface 512, the fourth inner wall surface 522, and the fifth inner wall surface 42 are also flat surfaces; the space between the first inner wall surface 102 and the third inner wall surface 512 is small and is directly bent to form an arc-shaped second inner wall surface 302 to connect the first inner wall surface 102 and the third inner wall surface 512. That is, between the first outer wall surface 101 and the third outer wall surface 511, there are two arc segments and also includes a flat surface, but between the first inner wall surface 102 and the third inner wall surface 512, there is and only includes a single arc segment.

[0042] In a specific embodiment, the resonant rod of the present invention is made by a deep drawing process. Please refer to Figure 9 , the deep drawing process includes the following steps:

[0043] Step 1: The flat metal sheet is first stamped downward to form a "prototype of the resonant rod", and the "prototype of the resonant rod" has a first inner cavity 1001, and the cross-section of the first inner cavity 1001 along its central axis 100 has a first width W1 and a first height H1;

[0044] Step 2: On the basis of the "prototype of the resonant rod", it is stamped downward a second time to form a "first deformation of the resonant rod", and the "first deformation of the resonant rod" has a second inner cavity 1002, and the cross-section of the second inner cavity 1002 along its central axis 100 has a second width W2 and a second height H2, where W1 > W2 and H1 < H2;

[0045] Step 3: Based on the "first deformation of the resonant rod", perform the third stamping in the reverse upward direction to form the "second deformation of the resonant rod". The "second deformation of the resonant rod" causes the resonant rod to form the mounting surface 4. Inside the second inner cavity 1002, the mounting surface 4 has the third height H3, and H3 < H2; and

[0046] Step 4: Based on the "second deformation of the resonant rod", perform the fourth stamping in the reverse upward direction to form the "final form of the resonant rod". The "final form of the resonant rod" means that a mounting hole 40 is formed on the mounting surface 4 and the resonant rod has small rounded corners, and the small rounded corners are the first connecting arc surfaces described in Claim 1.

[0047] The resonant rod of the present invention is based on the wall thickness T of the main body rod part being 0.5 mm to 1 mm, and through Figure 9 the deep drawing process shown, the arc length R1 of the first connecting arc surface is designed to be no more than 0.25 mm. Therefore, the coupling area between the resonant rod of the present invention and the cavity remains unchanged, and the overall elasticity of the part becomes larger. In terms of product indicators, there will be a better coupling effect. That is, the resonant rod of the present invention is a further improved design of the small rounded corners of the coupling surface based on the conventional design, achieving the beneficial effect that the smaller the R1 value and the larger the Q value (Q factor, quality factor); and the manufacturing method of the resonant rod of the present invention is relatively simple, completed continuously by a set of deep drawing dies without additional processes.

[0048] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art of the relevant technical field. For example, for the directional descriptions such as "front", "rear", "left", "right", "up", and "down", although this specification has described the present invention in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the relevant technical field can still modify the present invention or make equivalent substitutions, and all technical solutions and their improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A resonant rod, the resonant rod comprising: The main body rod (1) has a top end and a bottom end that are arranged opposite to each other in the vertical direction in which it extends, and the main body rod (1) has an inner cavity (10) located between the top end and the bottom end; The resonant disk portion (2) is integrally formed on the top end of the main body rod portion (1); and The coupling face (3) is integrally formed at the bottom end of the main body rod (1); The main body rod (1) includes a first outer wall surface (101) facing away from the inner cavity (10) in a first direction, and the coupling surface (3) includes a second outer wall surface (301) facing away from the inner cavity (10) in a second direction perpendicular to the first direction. A first connecting arc surface is provided between the first outer wall surface (101) and the second outer wall surface (301). Furthermore, the inner cavity (10) has a central axis (100) extending in a vertical direction. On a vertical section along the central axis (100), the wall thickness T of the main body rod (1) is 0.5 mm to 1 mm, and the arc length R1 of the first connecting arc surface is not greater than 0.25 mm. The resonant rod further includes: The mounting face (4) and the connecting part (5) are housed within the inner cavity (10) and the mounting face (4) is connected to the coupling face (3) via the connecting part (5). The connecting part (5) includes at least one inclined connecting part (51) connected to the coupling face (3).

2. The resonant rod according to claim 1, characterized in that, The mounting surface (4) and the coupling surface (3) extend in two planes arranged vertically, which are perpendicular to the central axis (100) and parallel to each other.

3. The resonant rod according to claim 2, characterized in that, The mounting surface (4) is provided with mounting holes (40), and the center of the mounting holes (40) is located on the central axis (100).

4. The resonant rod according to claim 3, characterized in that, The connecting part (5) also includes a vertical connecting part (52) connected to the mounting surface (4).

5. The resonant rod according to claim 4, characterized in that, The mounting face (4), the inclined connecting part (51), and the vertical connecting part (52) form an outer cavity (50). The inner cavity (10) and the outer cavity (50) are separated by the mounting face (4), the inclined connecting part (51), and the vertical connecting part (52) and are connected by the mounting hole (40).

6. The resonant rod according to claim 5, characterized in that, The main body rod (1) also includes a first inner wall surface (102) facing the inner cavity (10), the inclined connecting part (51) includes a third outer wall surface (511) facing the outer cavity (50), the inclined connecting part (51) includes a third inner wall surface (512) facing the inner cavity (10), the first inner wall surface (102) and the third inner wall surface (512) are connected by a bent second inner wall surface (302), the second inner wall surface (302) is directly bent into an arc shape; The second outer wall surface (301) and the third outer wall surface (511) have a second connecting arc surface. The first outer wall surface (101) and the third outer wall surface (511) include two arc segments and a plane. The first inner wall surface (102) and the third inner wall surface (512) include a single arc segment.

7. The resonant rod according to claim 6, characterized in that, On the vertical section along the central axis (100), the arc length R2 of the second connecting arc surface is 0.7mm to 0.9mm.

8. The resonant rod according to claim 7, characterized in that, The vertical connecting part (52) includes a fourth outer wall surface (521) facing the outer cavity (50), and a third connecting arc surface is provided between the third outer wall surface (511) and the fourth outer wall surface (521). On the vertical section along the central axis (100), the arc length R3 of the third connecting arc surface is 0.7mm to 0.9mm.

9. The resonant rod according to claim 8, characterized in that, The vertical connecting part (52) includes a fourth inner wall surface (522) facing the inner cavity (10), and the mounting surface (4) includes a fifth inner wall surface (42) facing the inner cavity (10). There is a fourth connecting arc surface between the fourth inner wall surface (522) and the fifth inner wall surface (42). On the vertical section along the central axis (100), the arc length R4 of the fourth connecting arc surface is 0.7mm to 0.9mm.

10. A method for manufacturing a resonant rod, characterized in that, Includes the following steps: Step 1: The flat metal sheet is pressed downwards for the first time to form the "prototype of the resonant rod". The "prototype of the resonant rod" has a first inner cavity (1001). The cross-section of the first inner cavity (1001) along its central axis (100) has a first width W1 and a first height H1. Step 2: Based on the "prototype of the resonant rod", a second downward stamping is performed to form the "first deformation of the resonant rod". The "first deformation of the resonant rod" has a second inner cavity (1002). The cross-section of the second inner cavity (1002) along its central axis (100) has a second width W2 and a second height H2, where W1>W2 and H1 <H2; Step 3: Based on the "first deformation of the resonant rod", a third stamping is performed in the opposite direction and upward to form the "second deformation of the resonant rod". The "second deformation of the resonant rod" causes the resonant rod to form a mounting surface (4). In the second inner cavity (1002), the mounting surface (4) has a third height H3. <H2; and Step 4: Based on the "second deformation of the resonant rod", a fourth stamping is performed in the opposite direction and upward to form the "final form of the resonant rod". The "final form of the resonant rod" refers to the formation of a mounting hole (40) on the mounting surface (4) and the resonant rod having a small rounded corner. The small rounded corner is the first connecting arc surface as described in claim 1.

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