filter

Abstract

The application is suitable for the technical field of radio frequency devices, and provides a filter, which comprises a cavity, a cover plate and an adjusting member. The cover plate covers the cavity and is provided with a tuning hole, a first groove and a tuning part. The first groove is arranged on the inner side wall of the tuning hole. The tuning part can be deformed under force and is opposite to the tuning hole along the axial direction of the tuning hole. The first groove is provided with a first wall on the side away from the tuning part along the axial direction of the tuning hole. The adjusting member is rotatably arranged on the cover plate and partially exposed to the tuning hole. The adjusting member is used for pressing against the first wall and the tuning part and is arranged to be capable of moving towards the tuning part under the pressing action of the first wall in the case of forward rotation. In this way, the adjusting member does not need to be grabbed by a debugging tool, so that a smaller adjusting member can be selected to avoid the debugging tool from the tuning hole, thereby solving the problem that the size of the adjusting member is too small to make the tuning operation difficult, and simplifying the tuning operation of the filter.

Description

Technical Field

[0001] This application belongs to the field of radio frequency device technology, and more specifically, relates to a filter. Background Technology

[0002] In related technologies, a filter includes a cavity and a cover plate that covers the cavity. The cover plate has a tuning section and a tuning hole corresponding to the position of the tuning section. The tuning section has an adjustment element exposed to the tuning hole. Based on this, related industries typically use a debugging tool to grasp the adjustment element through the tuning hole, so that the adjustment element can be moved by the debugging tool, thereby deforming the tuning section and adjusting the signal frequency.

[0003] However, in order to allow the tuning aperture to avoid the tuning tool, a smaller adjustment component must be selected. This makes it difficult for the tuning tool to grasp the adjustment component, making the tuning operation of the filter more difficult. Summary of the Invention

[0004] In view of the above problems, this application provides a filter that can improve the technical problem that the tuning operation of filters in related technologies is difficult.

[0005] This application provides a filter, including:

[0006] cavity;

[0007] A cover plate covers the cavity and has a tuning hole, a first groove, and a tuning part; the first groove is located on the inner wall of the tuning hole, the tuning part can be deformed under force and is opposite to the tuning hole along the axis of the tuning hole; the first groove has a first wall on the side away from the tuning part along the axis of the tuning hole.

[0008] An adjusting member is rotatably disposed on the cover plate and partially exposed to the tuning hole; the adjusting member is used to press against the first wall and the tuning part, and is configured to move toward the tuning part under the pressing action of the first wall during forward rotation.

[0009] The filter provided in this application embodiment has an adjustment member rotatably mounted on a cover plate, used to press against the tuning section and the first wall, and partially exposed within the tuning hole. Furthermore, the adjustment member can move the tuning section under the pressure of the first wall when rotating in the forward direction. Thus, an operator can manually or with a tuning tool rotate the adjustment member, causing the tuning section to deform under the rotation of the adjustment member, thereby adjusting the signal frequency. This eliminates the need for the operator to grasp the adjustment member with a tuning tool, thus avoiding the need to select a small adjustment member to prevent the tuning hole from obstructing the tuning tool. This solves the problem of difficult tuning operation caused by an excessively small adjustment member, thereby simplifying the filter tuning operation.

[0010] In some embodiments, the tuning section has elastic properties and is capable of resetting when the adjustment member rotates in the opposite direction.

[0011] In some embodiments, the adjusting member has a first boss at least partially disposed in a first groove, the first boss being used to press against a first wall and being able to slide along the first wall when the adjusting member rotates in the forward direction; the first wall extends about the central axis of the tuning hole, and the cavity has a fifth wall opposite to the cover plate; the axial distance between the first wall and the fifth wall gradually decreases in the direction of forward rotation of the adjusting member.

[0012] In some embodiments, the first wall is an inclined surface that is axially inclined relative to the tuning hole;

[0013] Alternatively, the first wall can be an arc-shaped surface;

[0014] Alternatively, the first wall may include multiple stepped surfaces, which are distributed sequentially in the direction of the forward rotation of the adjusting member, and the axial distance between them and the fifth wall gradually decreases.

[0015] In some embodiments, a transition surface connects two adjacent step surfaces, and the transition surface is a plane or an arc-shaped surface.

[0016] In some embodiments, there are multiple first walls, which are distributed sequentially around the central axis of the tuning hole; there are multiple first bosses, and each first wall is used to press against at least one first boss.

[0017] In some embodiments, the first groove is provided with a second boss on the side away from the tuning part along the axial direction of the tuning hole, and a first wall is provided on the second boss; the adjusting member is provided with a second wall, which is used to press against the first wall and can slide along the first wall when the adjusting member rotates in the forward direction; the cavity has a fifth wall opposite to the cover plate; in the direction of the forward rotation of the adjusting member, the axial distance between the second wall and the fifth wall is gradually reduced.

[0018] In some embodiments, the portion of the adjustment member exposed to the tuning hole is provided with an adjustment groove for an external adjustment tool to rotate the adjustment member.

[0019] In some embodiments, the cover plate includes:

[0020] The protective plate has a through-hole for tuning.

[0021] A tuning plate includes a tuning part and a connecting part, the connecting part being connected to the outer peripheral edge of the tuning part and to a protective plate; the tuning part and the connecting part together cover the cavity, or the tuning part, the connecting part and the protective plate together cover the cavity.

[0022] In some embodiments, the first groove extends through one end of the protective plate toward the tuning section in the axial direction of the tuning hole.

[0023] In some embodiments, the first groove has a second groove on its inner wall in a direction perpendicular to the axial direction of the tuning hole. The second groove passes through one end of the protective plate facing the tuning part in the axial direction of the tuning hole. The second groove has a third wall opposite to the tuning part on the side away from the tuning part along the axial direction of the tuning hole. The third wall is used to press against the adjusting member.

[0024] In some embodiments, the first groove has a fourth wall on the side of the tuning portion close to the tuning portion along the axial direction of the tuning hole, and the first boss is located between the first wall and the fourth wall.

[0025] In some embodiments, the filter further includes a resonant rod disposed within the cavity;

[0026] The resonant rods and the tuning section are spaced apart and arranged opposite each other; or, the resonant rods are connected to the tuning section, and the cavity has a fifth wall opposite to the cover plate, with the fifth wall and the resonant rods spaced apart.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A three-dimensional schematic diagram of a filter provided in some embodiments of this application;

[0030] Figure 2 for Figure 1 Exploded view;

[0031] Figure 3 for Figure 1 Sectional view along AA;

[0032] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0033] Figure 5 A perspective view of the protective plate of the filter provided in some embodiments of this application;

[0034] Figure 6 A perspective view of the adjustment element of the filter provided in some embodiments of this application;

[0035] Figure 7 A perspective view of the protective plate of the filter provided in other embodiments of this application;

[0036] Figure 8 Cross-sectional views of the adjustment element and cover plate of the filter provided in other embodiments of this application;

[0037] Figure 9 A cross-sectional view of a filter provided in some embodiments of this application.

[0038] The following are the labeling elements in the figure:

[0039] 10-Cavity; 101-Fifth wall; 20-Cover plate; 201-Tuning hole; 202-First groove; 203-First wall; 2031-Step surface; 2032-Transition surface; 204-Second groove; 205-Third wall; 206-Fourth wall; 207-Third groove; 21-Protective plate; 22-Tuning plate; 221-Tuning part; 222-Connecting part; 30-Adjusting component; 301-Adjusting groove; 31-First boss; 40-Resonant rod. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0041] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0043] In the description of this application, "multiple" means two or more, and unless otherwise expressly specified, "two or more" includes two. Accordingly, "multiple groups" means two or more groups, including two groups.

[0044] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In the description of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three possibilities: A exists, A and B exist simultaneously, and B exists. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0046] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0047] The following detailed description is provided in conjunction with specific accompanying drawings and embodiments:

[0048] Please refer to the following: Figures 1 to 5 The filter provided in this embodiment includes a cavity 10, a cover plate 20, and an adjusting member 30. The cover plate 20 covers the cavity 10. The cover plate 20 has a tuning hole 201, a first groove 202, and a tuning part 221. The first groove 202 is provided on the inner sidewall of the tuning hole 201, and the tuning part 221 is disposed opposite to the tuning hole 201 along the axial direction of the tuning hole 201. The tuning part 221 can deform under force. The first groove 202 has a first wall 203 on the side away from the tuning part 221 along the axial direction of the tuning hole 201. The adjusting member 30 is rotatably disposed on the cover plate 20 and is at least partially exposed to the tuning hole 201. The adjusting member 30 is used to press against the first wall 203 and the tuning part 221. The adjusting member 30 is configured such that when the adjusting member 30 is rotated in the forward direction, the adjusting member 30 can move toward the tuning part 221 under the pressing action of the first wall 203.

[0049] It should be noted that the axial direction of the tuning hole 201 refers to the extension direction of the central axis of the tuning hole 201, that is, the extension direction of the tuning hole 201, specifically the direction Y shown in the figure. For ease of description, it will be referred to as the axial direction below. That is, unless otherwise specified, the axial direction mentioned below refers to the axial direction of the tuning hole 201. Correspondingly, the central axis of the tuning hole 201 refers to the axis located at the center of the tuning hole 201 and parallel to the axial direction, specifically the axis L shown in the figure.

[0050] The tuning hole 201 can be a circular hole, a square hole, a hexagonal hole, an irregularly shaped hole, etc.

[0051] Cavity 10 refers to a solid structure with an internal cavity. A resonant cavity is located inside cavity 10, and a resonant rod 40 is located within the resonant cavity. Cavity 10 is made of metallic material.

[0052] The resonant rod 40 can be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod made of other materials. The resonant rod 40 can be a hollow resonant rod or a solid resonant rod. The resonant rod 40 can have a resonant disk or not. The resonant disk can have a flange or not. The resonant rod 40 can be a circular rod, a polygonal rod, an irregularly shaped rod, a sheet metal resonant rod, or other types of resonant rods, etc.

[0053] The cover plate 20 covers one end of the cavity 10 along the axial direction, especially the resonant cavity, to achieve the signal shielding function, thereby preventing signal leakage as much as possible, so that the filter can form a complete and effective filtering channel.

[0054] Tuning section 221 refers to a part of cover plate 20, and tuning section 221 can deform under the action of external force. Specifically, tuning section 221 can undergo elastic deformation or plastic deformation under the action of external force. Tuning section 221 is made of shape memory metal material that is deformable and can automatically spring back after deformation. Tuning section 221 can also be made of plastic metal material that is deformable but cannot automatically spring back after deformation. This embodiment does not limit this.

[0055] The inner wall of the tuning hole 201 refers to the inner wall of the tuning hole 201 around the axial direction, that is, the inner wall of the tuning hole 201 in the direction perpendicular to the axial direction. It can be understood that the first groove 202 is provided on the inner wall of the tuning hole 201 in the direction perpendicular to the axial direction.

[0056] The first groove 202 is provided on the inner sidewall of the tuning hole 201 to communicate with the tuning hole 201. Specifically, the projection of the first groove 202 along the axial direction surrounds the outer periphery of the projection of the tuning hole 201 along the axial direction, so that the first groove 202 and the tuning hole 201 form a stepped structure at the connection.

[0057] The first wall 203 refers to the side wall of the first groove 202 that is axially away from the tuning part 221. Specifically, the first wall 203 is connected to the inner wall of the tuning hole 201. The first wall 203 and the tuning part 221 are spaced apart along the axial direction.

[0058] The adjusting member 30 is rotatably disposed on the cover plate 20 about the central axis of the tuning hole 201. Specifically, a portion of the adjusting member 30 is disposed within the tuning hole 201, and another portion of the adjusting member 30 is disposed within the first groove 202. The portion of the adjusting member 30 disposed within the first groove 202 is used to press against the first wall 203. Alternatively, the portion of the adjusting member 30 disposed within the first groove 202 is used to press against the tuning part 221; or, the portion of the adjusting member 30 disposed within the tuning hole 201 is used to press against the tuning part 221; or, both the portions of the adjusting member 30 disposed within the first groove 202 and the portion disposed within the tuning hole 201 are used to press against the tuning part 221.

[0059] The first groove 202 is an arc-shaped groove or an annular groove that extends and bends around the central axis of the tuning hole 201. The first wall 203 has a slope, or the end face of the adjusting member 30 facing the first wall 203 has a slope. In this way, when the adjusting member 30 rotates on the cover plate 20, the part of the adjusting member 30 disposed in the first groove 202 can also rotate together and press against the first wall 203 during rotation.

[0060] At least a portion of the adjusting member 30 is exposed through the tuning hole 201, which axially extends through the side of the cover plate 20 away from the cavity 10. Therefore, the adjusting member 30 can extend from the tuning hole 201 outside the cover plate 20 to allow an external adjusting tool to rotate it. Alternatively, even if the adjusting member 30 does not extend outside the cover plate 20, an external adjusting tool can still be inserted into the tuning hole 201 from outside the cover plate 20 to rotate the adjusting member 30.

[0061] For ease of description, a fifth wall 101 is introduced here. The fifth wall 101 is provided in the cavity 10 and is arranged axially opposite to the cover plate 20.

[0062] Based on the above structure, the frequency modulation principle of the filter is as follows: The adjusting member 30 can be rotated circumferentially in a positive direction by manual operation or a tuning tool, causing it to rotate relative to the cover plate 20 about the central axis of the tuning hole 201. During this rotation, the adjusting member 30 continuously presses against the first wall 203, causing it to move axially towards the tuning section 221 under the pressure of the first wall 203, thus pressing against the tuning section 221 and deforming it towards the fifth wall 101 of the cavity 10. This changes the capacitance value within the resonant cavity, achieving a frequency modulation effect. Based on this, according to actual frequency modulation requirements, the adjusting member 30 can be rotated to a predetermined angle, causing it to move the tuning section 221 towards the fifth wall 101 by a predetermined stroke, thereby achieving a predetermined deformation of the tuning section 221. This allows for frequency modulation according to actual conditions.

[0063] The filter provided in this application embodiment has an adjustment member 30 rotatably mounted on the cover plate 20, used to press against the tuning part 221 and the first wall 203, and partially exposed within the tuning hole 201. Furthermore, the adjustment member 30 can drive the tuning part 221 to move under the pressure of the first wall 203 when rotating in the forward direction. Thus, the operator can manually or with a tuning tool rotate the adjustment member 30, causing the tuning part 221 to deform under the rotation of the adjustment member 30, thereby adjusting the signal frequency. This eliminates the need for the operator to use a tuning tool to grasp the adjustment member 30, thus avoiding the need to select a small adjustment member 30 to prevent the tuning hole 201 from obstructing the tuning tool. This solves the problem of the adjustment member 30 being too small to be grasped, making tuning difficult, and thus simplifies the filter tuning operation. It also solves the problem of the adjustment member 30 being easily damaged by the tuning tool due to its small size, thus protecting the adjustment member 30.

[0064] Furthermore, in related technologies, to facilitate the gripping of the adjustment member 30 by the debugging tool, a large radial space is required between the inner circumference of the tuning hole 201 and the adjustment member 30. This results in the tuning part 221 being excessively exposed to the tuning hole 201, which can easily damage the tuning part 221. However, the filter provided in this embodiment does not require increasing the radial space between the tuning hole 201 and the adjustment member 30 to avoid the debugging tool. This reduces the portion of the tuning part 221 exposed to the tuning hole 201, lowers the probability of damage to the tuning part 221, and helps to improve the service life of the filter.

[0065] In some embodiments, the tuning part 221 has elastic properties and can be reset when the adjusting member 30 is rotated in the opposite direction.

[0066] The adjusting member 30 is configured such that when the adjusting member 30 rotates in the forward direction, the adjusting member 30 can move toward the tuning part 221 under the pressing action of the first wall 203; when the adjusting member 30 rotates in the reverse direction, the adjusting member 30 can gradually release the pressing action on the tuning part 221, and the tuning part 221 resets under its own elastic action, so as to drive the adjusting member 30 to reset as well.

[0067] Understandably, the tuning part 221 is made of a shape memory metal material that is deformable and can automatically spring back after deformation, that is, the tuning part 221 can elastically reset under elastic properties.

[0068] Based on this, manual operation or adjustment tools can rotate the adjusting member 30 not only in the forward circumferential direction but also in the reverse circumferential direction, causing the adjusting member 30 to rotate in the opposite direction relative to the cover plate 20 around the central axis of the tuning hole 201. During the reverse rotation of the adjusting member 30, the first wall 203 does not press against the adjusting member 30, and the adjusting member 30 gradually releases its pressing effect on the tuning part 221. Based on this, the tuning part 221 rebounds axially away from the cavity 10 to elastically reset, thereby deforming the fifth wall 101 of the tuning part 221 away from the cavity 10. In this way, the capacitance value in the resonant cavity can be changed to achieve the frequency modulation effect. Specifically, after the adjusting member 30 moves a predetermined distance axially away from the tuning part 221, it will press against the first wall 203, that is, at this time the adjusting member 30 presses against both the first wall 203 and the tuning part 221. Under the pressure of the first wall 203, the movement stroke of the adjusting member 30 away from the tuning part 221 can be limited, thereby limiting the rebound stroke of the tuning part 221 and maintaining the deformation of the tuning part 221 in this state.

[0069] The aforementioned forward rotation can be clockwise, and correspondingly, the reverse rotation is counterclockwise. Alternatively, the aforementioned forward rotation can be counterclockwise, and correspondingly, the reverse rotation is clockwise. As an example, such as... Figure 5 As shown, the counterclockwise direction X1 of the protective plate 21 in the figure corresponds to the forward rotation direction of the adjusting member 30; the clockwise direction X2 of the protective plate 21 in the figure corresponds to the reverse rotation direction of the adjusting member 30.

[0070] By adopting the above technical solution, the tuning part 221 can be deformed under the rotation of the adjusting member 30, whether the adjusting member 30 is rotated in the forward or reverse direction, so as to achieve the adjustment of the signal frequency.

[0071] In some embodiments, please refer to the following: Figures 4 to 7In conjunction with other accompanying drawings, the adjusting member 30 is provided with a first boss 31, at least a portion of which is located within the first groove 202. The first boss 31 is used to press against the first wall 203 and is capable of sliding along the first wall 203 when the adjusting member 30 rotates in the forward direction. The first wall 203 extends around the central axis of the tuning hole 201. The cavity 10 has a fifth wall 101, which is axially opposed to the cover plate 20.

[0072] In the positive rotation direction of the adjusting member 30, the axial distance between the first wall 203 and the fifth wall 101 is gradually reduced. For example, as shown... Figure 5 As shown, in the counterclockwise direction of the protective plate 21, the axial distance between the first wall 203 and the fifth wall 101 gradually decreases. Correspondingly, in the opposite rotation direction of the adjusting member 30 (that is,... Figure 5 The axial distance between the first wall 203 and the fifth wall 101 gradually increases in the clockwise direction.

[0073] The first wall 203 is an arc-shaped wall or an annular wall that extends and bends around the central axis of the tuning hole 201.

[0074] By adopting the above technical solution, along the adjusting member 30 Figure 5 During the counterclockwise rotation (i.e., forward rotation), the first protrusion 31 on the adjusting member 30 rotates counterclockwise and slides counterclockwise along the first wall 203. Since the axial distance between the first wall 203 and the fifth wall 101 gradually decreases in the counterclockwise direction, the first protrusion 31 also moves axially toward the tuning part 221 during its rotation along the first wall 203, causing the tuning part 221 to deform toward the fifth wall 101 of the cavity 10. During the clockwise rotation (i.e., reverse rotation) of the adjusting member 30, since the axial distance between the first wall 203 and the fifth wall 101 gradually increases in the clockwise direction, the first protrusion 31 gradually disengages from the first wall 203 during rotation, causing the tuning part 221 to elastically return to its original position and deform toward the fifth wall 101 of the cavity 10 until the first protrusion 31 abuts against the first wall 203. This configuration allows the adjustment member 30 to deform the tuning section 221 during rotation, thereby changing the capacitance value within the resonant cavity and achieving the effect of frequency modulation.

[0075] Some related technologies use a tuning bolt to rotate and deform the tuning section 221. These filters typically require a nut on the cover plate 20, with the tuning bolt and nut threaded together, allowing axial movement during rotation to deform the tuning section 221. This nut increases the number of filter components, leading to increased weight and size, which is detrimental to lightweight and miniaturized design. It also makes the overall filter structure more complex. In this embodiment, however, only an adjusting member 30 needs to be rotatably mounted on the cover plate 20, and this member can be used to press against the first wall 203 and the tuning section 221. The structure is very simple, with fewer components, facilitating lightweight and miniaturized filter design.

[0076] In some embodiments, please refer to the following: Figure 2 and Figure 6 The adjusting member 30 can be recessed on the side facing the tuning part 221 along the axial direction, so that the adjusting member 30 protrudes on the side facing away from the tuning part 221 to form a first boss 31. That is, the adjusting member 30 can be formed by stamping. On the one hand, the first boss 31 can be formed without increasing the weight of the adjusting member 30, which is conducive to the lightweight design of the filter, and on the other hand, the adjusting member 30 can also have high structural strength.

[0077] In some embodiments, please refer to Figure 7 Furthermore, in conjunction with other accompanying drawings, the first wall 203 is an inclined surface that is tilted relative to the axial direction. Alternatively, the first wall 203 is an arc-shaped surface.

[0078] This configuration allows the first wall 203 to press against the adjusting member 30 during its rotation, causing the adjusting member 30 to deform the tuning part 221. Furthermore, the first boss 31 can slide to any position on the first wall 203, allowing the tuning part 221 to achieve any amount of deformation. This enables precise frequency tuning of the filter, meaning the filter can be adjusted to any frequency.

[0079] In some embodiments, please refer to Figure 5 Furthermore, in conjunction with other accompanying drawings, the first wall 203 includes a plurality of stepped surfaces 2031, which are sequentially distributed along the circumference of the tuning hole 201. Moreover, in the forward rotation direction of the adjusting member 30, the axial distance between the stepped surfaces 2031 and the fifth wall 101 gradually decreases.

[0080] As an example, such as Figure 5 As shown, in the counterclockwise direction of the protective plate 21, the axial distance between the multiple stepped surfaces 2031 and the fifth wall 101 gradually decreases. Correspondingly, in the clockwise direction of the protective plate 21, the axial distance between the multiple stepped surfaces 2031 and the fifth wall 101 gradually increases.

[0081] By adopting the above technical solution, the first protrusion 31 can alternately slide onto multiple stepped surfaces 2031. When the first protrusion 31 presses against different stepped surfaces 2031, the tuning part 221 will produce different deformation amounts. That is, when the first protrusion 31 presses against any stepped surface 2031, the tuning part 221 will have a corresponding deformation amount. Thus, according to actual tuning requirements, the adjustment member 30 can be controlled to rotate to which step surface 2031 the first protrusion 31 presses against, thereby obtaining the desired deformation amount of the tuning part 221 and achieving the predetermined frequency modulation effect. Therefore, the deformation amount of the tuning part 221 can be quantized, thereby realizing the quantized frequency modulation effect of the filter. That is, the filter can achieve the adjustment effect of a predetermined frequency.

[0082] In some embodiments, please refer to Figure 5 Furthermore, in conjunction with other accompanying drawings, a transition surface 2032 connects two adjacent step surfaces 2031. The transition surface 2032 is either a plane or an arc-shaped surface.

[0083] This configuration allows for a smooth transition between two adjacent stepped surfaces 2031, which facilitates the sliding of the first boss 31 between multiple stepped surfaces 2031, thereby improving the flexibility of the adjustment member 30's rotation and thus enhancing tuning flexibility.

[0084] In some embodiments, please refer to the following: Figure 5 and Figure 6 Furthermore, in conjunction with other accompanying drawings, the number of first walls 203 is set to multiple, and the multiple first walls 203 are distributed sequentially around the central axis of the tuning hole 201. The number of first bosses 31 is also multiple, and each first wall 203 is used to press against at least one first boss 31.

[0085] In some possible designs, the number of first protrusions 31 is the same as the number of first walls 203, and each first protrusion 31 is used to abut against each first wall 203. In other possible designs, the number of first protrusions 31 is greater than the number of first walls 203, and at least one first wall 203 is used to abut against at least two first protrusions 31.

[0086] Among them, multiple first bosses 31 are distributed at intervals around the central axis of the tuning hole 201.

[0087] The multiple first walls 203 can be set at intervals or connected sequentially.

[0088] By adopting the above technical solution, the multiple first protrusions 31 can be used to press against the multiple first walls 203 respectively. In this way, the adjusting member 30 can drive the tuning part 221 to deform under the pressing action of the multiple first walls 203. The force on the adjusting member 30 is more uniform and the rotation process is more stable. This makes the pressing and deformation action of the adjusting member 30 on the tuning part 221 more stable and reliable.

[0089] In some embodiments, the number of first walls 203 may also be one. The two ends of the first walls 203 may be spaced apart or connected to each other.

[0090] In some embodiments, the first wall 203 is not configured such that its axial distance from the fifth wall 101 gradually decreases along the positive rotation direction of the adjusting member 30, and the adjusting member 30 is not provided with a first boss 31. Instead:

[0091] The first groove 202 has a second boss on the side away from the tuning part 221 along the axial direction of the tuning hole 201, and a first wall 203 is provided on the second boss. Understandably, the first wall 203 is the side wall of the second boss facing the tuning part 221 along the axial direction. The adjusting member 30 has a second wall; specifically, the second wall is the wall surface of the portion of the adjusting member 30 located within the first groove 202 facing the first wall 203. The second wall is used to press against the first wall 203 and can slide along the first wall 203 when the adjusting member 30 rotates forward. The cavity 10 has a fifth wall 101 disposed opposite to the cover plate 20. In the forward rotation direction of the adjusting member 30, the axial distance between the second wall and the fifth wall 101 gradually decreases. Correspondingly, in the reverse rotation direction of the adjusting member 30, the axial distance between the second wall and the fifth wall 101 gradually increases.

[0092] With this configuration, during the forward rotation of the adjusting member 30, the first wall 203 abuts against the second wall via the second boss, allowing the second wall to drive the adjusting member 30 to move axially toward the tuning part 221, thereby causing the tuning part 221 to deform toward the fifth wall 101 of the cavity 10. During the reverse rotation of the adjusting member 30, the tuning part 221 returns to its original position.

[0093] The second wall can also be set as a slope, an arc surface, or include multiple stepped surfaces 2031. Its specific structure can be similar to that of the first wall 203. For details, please refer to the reference. It will not be described in detail here.

[0094] In some embodiments, please refer to Figure 6 In conjunction with other accompanying drawings, the portion of the adjusting member 30 exposed to the tuning hole 201 is provided with an adjusting groove 301, which is used for external debugging tools to rotate the adjusting member 30.

[0095] The adjustment groove 301 is provided on the side of the adjustment member 30 facing away from the tuning part 221, so that it can be exposed to the outside through the tuning hole 201, so that the adjustment tool can use the adjustment groove 301 to rotate the adjustment member 30.

[0096] The adjusting groove 301 can be set as an "I" shaped groove, an "X" shaped groove, or other shapes.

[0097] By adopting the above technical solution, the adjustment tool can be inserted into the adjustment slot 301 to drive the adjustment component 30 to rotate. In this way, there is no need for the adjustment tool to grab the adjustment component 30, making the rotation operation of the adjustment component 30 very simple and easy to implement, and improving the problem of the adjustment component 30 being damaged by grabbing.

[0098] In some embodiments, please refer to the following: Figure 2 and Figure 6 The adjustment member 30 can be recessed on the side facing the tuning part 221 along the axial direction, so that the side of the adjustment member 30 facing away from the tuning part 221 protrudes to form a part for opening the adjustment slot 301. This can also help to achieve the lightweight design of the filter, enable the adjustment member 30 to have high structural strength, and also provide enough space for the adjustment tool to be inserted into the adjustment slot 301.

[0099] The portion of the adjusting member 30 used to create the adjusting groove 301 can be spaced apart from or connected to the first boss 31.

[0100] In some embodiments, such as Figure 6 As shown, the adjustment groove 301 can pass through the adjustment member 30 along the axial direction, which is conducive to realizing the lightweight design of the adjustment member 30 and facilitates the insertion of adjustment tools.

[0101] In some embodiments, the adjusting groove 301 may not extend axially through the adjusting member 30, that is, the adjusting member 30 may not extend through the opposite sides axially. In this way, the problem of debris falling into the tuning section 221 can be improved, and the problem of the adjustment member 30 being hindered from rotating due to debris falling between the tuning section 221 and the adjusting member 30 can be improved.

[0102] In some embodiments, please refer to the following: Figures 1 to 4 The cover plate 20 includes a protective plate 21 and a tuning plate 22. The protective plate 21 has the aforementioned tuning hole 201 extending through it along the axial direction. Based on this, the first groove 202 and the first wall 203 are both provided on the protective plate 21.

[0103] The tuning plate 22 includes the tuning part 221 and the connecting part 222, with the tuning part 221 and the tuning hole 201 facing each other axially. The connecting part 222 is connected to the outer peripheral edge of the tuning part 221 and to the protective plate 21.

[0104] In some possible designs, the tuning part 221 and the connecting part 222 together cover the cavity 10, that is, the tuning plate 22 covers the cavity 10. Based on this, both the tuning part 221 and the connecting part 222 are made of metal so that the tuning plate 22 can perform signal shielding. The protective plate 21 can be a structural component of any material, such as metal, or non-metallic materials such as plastic or wood. The connecting part 222 is located between the cavity 10 and the protective plate 21, and connects the cavity 10 and the protective plate 21.

[0105] In some possible designs, the tuning section 221, the connecting section 222, and the protective plate 21 together cover the cavity 10. Understandably, the tuning plate 22 cannot cover the cavity 10 alone. Therefore, the tuning plate 22 and the protective plate 21 are used together to achieve signal shielding of the cavity 10. The connecting section 222 is connected to the protective plate 21, and the connecting section 222 is spaced apart from the inner wall of the cavity 10; for example, the connecting section 222 can be fixed to the protective plate 21 by welding, bolting, riveting, snap-fitting, etc. Both the tuning plate 22 and the protective plate 21 are made of metal.

[0106] This configuration allows the tuning section 221 and the connecting section 222 to jointly cover the cavity 10, or the tuning section 221, the connecting section 222, and the protective plate 21 to jointly cover the cavity 10, thereby achieving the function of signal shielding and preventing signal leakage of the filter.

[0107] In some embodiments, please refer to the following: Figures 2 to 5 Furthermore, in conjunction with other accompanying drawings, in the axial direction of the tuning hole 201, the first groove 202 penetrates one end of the protective plate 21 facing the tuning part 221.

[0108] With this configuration, when installing the filter, the adjusting member 30 can be first inserted into the protective plate 21 from the end facing the tuning part 221, and then the tuning plate 22 can be placed on the protective plate 21 to limit the adjusting member 30. Finally, the cover plate 20 and the cavity 10 can be installed. This facilitates the installation of the adjusting member 30 from the side of the protective plate 21 facing the tuning part 221, simplifying the installation of the adjusting member 30 and thus simplifying the assembly of the filter.

[0109] Furthermore, the first groove 202 passes through the end of the protective plate 21 facing the tuning part 221, so that the part of the adjusting member 30 located in the first groove 202 can also be used to press against the tuning part 221, which makes it easier for the adjusting member 30 to drive the tuning part 221 to deform during rotation.

[0110] In addition, the first groove 202 passes through one end of the protective plate 21 facing the tuning part 221, which makes the structure of the protective plate 21 very simple and also facilitates the forming of the first groove 202 and the tuning hole 201 of the protective plate 21.

[0111] In some embodiments, please refer to the following: Figures 3 to 5 The first groove 202 has a second groove 204 on its inner sidewall in a direction perpendicular to the axial direction. Specifically, the projection of the second groove 204 along the axial direction surrounds the outer periphery of the projection of the first groove 202 along the axial direction, so that the second groove 204 and the first groove 202 form a stepped structure at the connection.

[0112] In the axial direction of the tuning hole 201, the second groove 204 passes through one end of the protective plate 21 facing the tuning part 221. The second groove 204 is provided with a third wall 205 on the side away from the tuning part 221 along the axial direction of the tuning hole 201. The third wall 205 is arranged opposite to the tuning part 221 in the axial direction, and the third wall 205 is used to press against the adjusting member 30.

[0113] The third wall 205 refers to the side wall of the second groove 204 that is axially away from the tuning part 221. Specifically, the third wall 205 is connected to the inner wall of the first groove 202, that is, the third wall 205 is located at the bottom of the second groove 204 along the axial direction. The third wall 205 and the tuning part 221 are spaced apart along the axial direction. Correspondingly, the first wall 203 is located at the bottom of the first groove 202 along the axial direction.

[0114] This configuration has two advantages. First, when installing the adjusting member 30, simply rotating it so that its corresponding position presses against the third wall 205 ensures that the first boss 31 is precisely pressed against the position where the axial distance between the first wall 203 and the fifth wall 101 is greatest, thus placing the adjusting member 30 in its initial state. Then, when the tuning plate 22 is installed on the protective plate 21, it is also in a state without deformation. Therefore, this facilitates the positioning and installation of the adjusting member 30 on the protective plate 21, improving the installation efficiency of the adjusting member 30 and consequently the assembly efficiency of the filter. Second, by rotating the adjusting member 30 in the reverse circumferential direction to allow the tuning part 221 to return to its original position, the adjusting member 30 can press against the third wall 205, limiting the return stroke of the tuning part 221. Furthermore, the second groove 204 is disposed on the inner sidewall of the first groove 202, so that part of the adjusting member 30 can be disposed in the second groove 204, thereby giving the adjusting member 30 more area to press against the tuning part 221, which facilitates the deformation of the tuning part 221.

[0115] In some embodiments, please refer to Figure 8Furthermore, in conjunction with other accompanying drawings, the first groove 202 does not penetrate the protective plate 21 along the axial direction towards the tuning part 221. Instead, the first groove 202 has a fourth wall 206 along the axial direction of the tuning hole 201 near the tuning part 221, meaning the first groove 202 ends at the fourth wall 206 along the axial direction towards the tuning part 221. The first boss 31 is axially limited between the first wall 203 and the fourth wall 206.

[0116] The fourth wall 206 is the side wall of the first groove 202 that is close to the tuning part 221 along the axial direction. The first wall 203 and the fourth wall 206 are arranged opposite each other along the axial direction, that is, the first wall 203 and the fourth wall 206 are two wall surfaces of the first groove 202 that are opposite each other along the axial direction.

[0117] To facilitate the sliding of the first boss 31 within the first groove 202, the axial dimension of the first groove 202 is designed to match the axial dimension of the first boss 31. Specifically, the axial distance between the first wall 203 and the fourth wall 206 matches the axial dimension of the first boss 31. In particular, the axial distance between the first wall 203 and the fourth wall 206 is substantially the same in the circumferential direction. Based on this, along the positive rotational direction of the adjusting member 30 in the circumferential direction, the axial distance between the fourth wall 206 and the tuning part 221 gradually decreases, thus ensuring that the axial distance between the first wall 203 and the fourth wall 206 is substantially the same in the circumferential direction.

[0118] With this configuration, under the limiting action of the first wall 203 and the fourth wall 206, when the first boss 31 rotates in the forward circumferential direction, the first boss 31 moves axially toward the tuning part 221, thereby causing the tuning part 221 to deform toward the fifth wall 101. When the first boss 31 rotates axially in the reverse direction, the first boss 31 moves axially away from the tuning part 221, so that the tuning part 221 can spring back toward the adjusting member 30.

[0119] In some embodiments, such as Figure 8 As shown, the inner wall of the tuning hole 201 may also be provided with a third groove 207 that is axially spaced from the first groove 202, and at least a portion of the adjusting member 30 is disposed in the third groove 207. This arrangement allows the adjusting member 30 to have a larger area to press against the tuning part 221, making it easier for the adjusting member 30 to drive the tuning part 221 to deform.

[0120] In some embodiments, please refer to the following: Figure 2 , Figure 3 and Figure 9 In conjunction with other accompanying drawings, the filter also includes a resonant rod 40, which is disposed inside the cavity 10.

[0121] In some embodiments, such as Figure 2 and Figure 3As shown, the resonant rod 40 is fixed to the cavity 10 and is spaced apart from the tuning part 221, and is arranged opposite to it. With this arrangement, under the pressure of the adjusting member 30, the tuning part 221 can deform toward the resonant rod 40; the tuning part 221 can also move and deform away from the resonant rod 40. In this way, the axial distance between the tuning part 221 and the resonant rod 40 can be adjusted to change the capacitance of the resonator and achieve the effect of adjusting the resonant frequency.

[0122] The resonant rod 40 can be connected to the cavity 10 by, but is not limited to, integral connection, welding, riveting, threaded connection, riveting, snap-fit, snap-fit, etc.

[0123] In some embodiments, please refer to Figure 9 Furthermore, in conjunction with other accompanying drawings, the resonant rod 40 is connected to the tuning section 221. The cavity 10 has a fifth wall 101 opposite to the cover plate 20, and the fifth wall 101 is spaced apart from the resonant rod 40.

[0124] Based on this, when the tuning part 221 deforms, it can drive the resonant rod 40 to move toward or away from the fifth wall 101, so as to adjust the axial distance between the resonant rod 40 and the fifth wall 101, thereby changing the capacitance of the resonator and achieving the effect of adjusting the resonant frequency.

[0125] The resonant rod 40 can be connected to the tuning part 221 by means of, but not limited to, integral connection, welding, riveting, threaded connection, riveting, snap-fit, snap-fit, etc.

[0126] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A filter, characterized in that, include: cavity; A cover plate covers the cavity and is provided with a tuning hole, a first groove, and a tuning part; The first groove is provided on the inner sidewall of the tuning hole. The tuning part can be deformed under force and is opposite to the tuning hole along the axial direction of the tuning hole. The first groove has a first wall on the side away from the tuning part along the axial direction of the tuning hole. An adjusting member is rotatably disposed on the cover plate and partially exposed to the tuning hole; a portion of the adjusting member is disposed within the tuning hole, and a portion of the adjusting member is disposed within the first groove. The adjusting member is used to press against the first wall and the tuning part, and is configured to move toward the tuning part under the pressure of the first wall during forward rotation.

2. The filter according to claim 1, characterized in that, The tuning part has elastic properties and can be reset when the adjusting member is rotated in the opposite direction.

3. The filter according to claim 1, characterized in that, The adjusting member has a first boss at least partially disposed within the first groove. The first boss is used to press against the first wall and can slide along the first wall when the adjusting member rotates in the forward direction. The first wall extends around the central axis of the tuning hole. The cavity has a fifth wall opposite to the cover plate. The axial distance between the first wall and the fifth wall gradually decreases in the direction of forward rotation of the adjusting member.

4. The filter according to claim 3, characterized in that, The first wall is an inclined surface that is tilted relative to the axial direction of the tuning hole; Alternatively, the first wall may be an arc-shaped surface; Alternatively, the first wall may include multiple stepped surfaces, which are sequentially distributed in the direction of the forward rotation of the adjusting member, and their axial distance from the fifth wall gradually decreases.

5. The filter according to claim 4, characterized in that, A transition surface connects two adjacent stepped surfaces, and the transition surface is either a plane or an arc-shaped surface.

6. The filter according to claim 3, characterized in that, There are multiple first walls, which are distributed sequentially around the central axis of the tuning hole; there are multiple first bosses, and each first wall is used to press against at least one first boss.

7. The filter according to claim 1, characterized in that, The first groove has a second protrusion on the side away from the tuning part along the axial direction of the tuning hole, and the first wall is provided on the second protrusion; the adjusting member has a second wall, which is used to press against the first wall and can slide along the first wall when the adjusting member rotates in the forward direction; the cavity has a fifth wall opposite to the cover plate; the axial distance between the second wall and the fifth wall gradually decreases in the direction of the forward rotation of the adjusting member.

8. The filter according to any one of claims 1-7, characterized in that, The portion of the adjusting member exposed to the tuning hole is provided with an adjusting groove, which is used to allow an external adjusting tool to rotate the adjusting member.

9. The filter according to any one of claims 1-7, characterized in that, The cover plate includes: The protective plate has the tuning hole through it; A tuning plate includes a tuning part and a connecting part, the connecting part being connected to the outer peripheral edge of the tuning part and to the protective plate; the tuning part and the connecting part together cover the cavity, or the tuning part, the connecting part and the protective plate together cover the cavity.

10. The filter according to claim 9, characterized in that, In the axial direction of the tuning hole, the first groove passes through one end of the protective plate facing the tuning part.

11. The filter according to claim 10, characterized in that, The first groove has a second groove on its inner sidewall in a direction perpendicular to the axial direction of the tuning hole. The second groove passes through one end of the protective plate facing the tuning part in the axial direction of the tuning hole. The second groove has a third wall opposite to the tuning part on the side away from the tuning part along the axial direction of the tuning hole. The third wall is used to press against the adjusting member.

12. The filter according to any one of claims 3-6, characterized in that, The first groove has a fourth wall on the side of the tuning hole close to the tuning part along the axial direction, and the first boss is located between the first wall and the fourth wall.

13. The filter according to any one of claims 1-7, characterized in that, The filter also includes a resonant rod disposed within the cavity; The resonant rods are spaced apart from the tuning section and are arranged opposite to each other; or, the resonant rods are connected to the tuning section, and the cavity has a fifth wall opposite to the cover plate, the fifth wall being spaced apart from the resonant rods.

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