A wave trap

Abstract

The utility model discloses a wave trap, including shell and be located in the inner shell of shell, fixedly connected with inner core and inductance coil on the inner shell, be equipped with the aperture unit for fixing inner core and inductance coil on the inner shell, form the cambered surface unit between aperture unit and the outer wall of inner shell, and aperture unit extends to the inside of inner shell and forms the convex unit, and aperture unit intercommunication cambered surface unit and convex unit. The utility model discloses reasonable structure design, and the aperture of inner shell side surface and bottom surface all adopt non - material punching process, and the aperture around convex circle forms convex unit, increases the interface of the component of interface, and the cambered surface unit is formed to the outside of aperture, forms the tin dissolving groove, makes tin not to flow to other position, guarantees that tin and the interface of component are covered well, thereby guarantees that the welding is good, and it is not easy to appear the phenomenon of false welding.

Description

Technical Field

[0001] This utility model relates to the field of filters, and more particularly to a notch filter. Background Technology

[0002] With the rapid development of society and economy, a notch filter is a resonant circuit, or an automatic switching sensor. Its principle is that it is an LC oscillator. When its coil is close to another resonant circuit and the oscillation frequency is close to the resonant frequency of the circuit being measured, the oscillation energy is absorbed and the oscillation weakens. By changing the oscillation frequency of the notch filter until the oscillation weakens to the lowest point, the oscillation frequency is the resonant frequency of the circuit being measured. In antenna engineering, it can automatically extend or shorten the length of the antenna according to the frequency of the signal. In radio receivers, it is a filter specially used to eliminate certain unwanted signals to reduce interference with useful signals. It is used in circuits to filter out signals of unwanted frequencies.

[0003] Existing notch filters are machined in one piece, which results in high material costs, long processing time, and high overall costs. The inner shell sidewalls and bottom are opened with straight holes, and the inductor coil and inner core are fixed to the inner shell by insertion and welding through the straight holes. However, this hole-fixing method results in a small contact area between the inductor coil and inner core and the hole surface. The welding joint is a flat surface, which is prone to solder run-through, causing quality problems such as cold solder joints and poor solder joints. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a notch filter in light of the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a notch filter, including an outer shell and an inner shell disposed inside the outer shell, an inner core and an inductor coil are fixedly connected on the inner shell, an opening unit for fixing the inner core and the inductor coil is provided on the inner shell, an arc surface unit is formed between the opening unit and the outer wall of the inner shell, and a protrusion unit is formed by extending the opening unit into the inner shell, and the opening unit connects the arc surface unit and the protrusion unit.

[0006] Preferably, the opening unit includes a first opening on the inner shell sidewall and a second opening on the inner shell bottom, the arc surface unit includes a first arc surface connecting the first opening and the inner shell sidewall through a smooth arc, and the arc surface unit also includes a second arc surface connecting the second opening and the inner shell bottom surface through a smooth arc.

[0007] Preferably, the protrusion unit includes a first protrusion protruding into the inner shell from the first opening, and the protrusion unit also includes a second protrusion protruding into the inner shell from the second opening. The end of the inductor coil passes through the first arc surface, the first opening and the first protrusion in sequence. The outer wall of one end of the inductor coil passing through the first protrusion is tightly fixedly connected to the inner wall of the first protrusion. The portion of the inductor coil arranged in the first arc surface is tightly fixedly connected to the first arc surface.

[0008] Preferably, the inner core end passes through the second protrusion, the second opening, and the second arc surface in sequence; the outer wall of the inner core passing through the second protrusion end is tightly fixedly connected to the inner wall of the second protrusion; and the end of the inner core arranged in the second arc surface is tightly fixedly connected to the second arc surface.

[0009] Preferably, the first arc surface is a first molten solder bath for the flow of solder to make the inductor coil weld more firmly. The solder flows in from the first molten solder bath and enters the first protrusion through the first opening. The solder fills the space between the inner wall of the first protrusion and the outer wall of the inductor coil. After fixing, the solder fills the first molten solder bath.

[0010] Preferably, the second arc surface is a second molten solder bath for the flow of solder to make the inner core weld more firmly. The solder flows in from the second molten solder bath and enters the second protrusion through the second opening. The solder fills the space between the inner wall of the second protrusion and the outer wall of the inner core. After fixing, the solder fills the second molten solder bath.

[0011] Preferably, the outer casing is covered with FEP heat-shrinkable conduits for high temperature resistance and insulation, and the outer casing sidewall is provided with a notch corresponding to the first molten solder bath.

[0012] Compared with the prior art, the advantages of this utility model are as follows: the openings on the side and bottom of the inner shell are all made by non-material removal punching process, so that a raised ring is formed around the opening to form a raised unit, which increases the connection surface of the connected parts. At the same time, an arc-shaped unit is formed on the outside of the opening to form a solder bath, so that the solder will not flow to other positions, ensuring that the solder and the connected parts are well covered, thereby ensuring good welding and making it less likely to have cold solder joints or false solder joints. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model;

[0015] Figure 3 This is an exploded structural diagram of the present invention.

[0016] Reference numerals in the attached drawings: 1. Outer shell; 2. Inner shell; 3. Inner core; 4. Inductor coil; 5. First opening; 6. Second opening; 7. First arc surface; 8. Second arc surface; 9. First protrusion; 10. Second protrusion; 11. First solder bath; 12. Second solder bath; 13. Notch. Detailed Implementation

[0017] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0018] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] Furthermore, in addition to indicating orientation or positional relationship, the aforementioned terms may also be used to indicate other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in this utility model can be understood according to the specific circumstances.

[0020] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts. The connection methods described herein are existing technologies without any modifications and are common knowledge to those skilled in the art. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] like Figures 1 to 3 As shown, this utility model provides a notch filter, including a housing 1 and an inner housing 2 disposed inside the housing 1. An inner core 3 and an inductor coil 4 are fixedly connected to the inner housing 2. An opening unit for fixing the inner core 3 and the inductor coil 4 is provided on the inner housing 2. Specifically, an arc surface unit is formed between the opening unit and the outer wall of the inner housing 2. The opening unit extends into the inner housing 2 to form a protruding unit. The opening unit connects the arc surface unit and the protruding unit.

[0023] The inner shell 2 is made of free-cutting iron material and is formed by stretching. The side walls and bottom surface of the inner shell 2 are punched using a non-material removal process, which makes a raised ring around the opening unit to form a raised unit. This increases the connection surface between the inner core 3 and the inductor coil 4 and the inner wall of the inner shell 2. In addition, the surface of the inner shell 2 is silver-plated, which saves materials and improves processing efficiency.

[0024] The opening unit includes a first opening 5 on the side wall of the inner shell 2 and a second opening 6 on the bottom of the inner shell 2; specifically, the arc surface unit includes a first arc surface 7 that connects the first opening 5 and the side wall of the inner shell 2 through a smooth arc, and the arc surface unit also includes a second arc surface 8 that connects the second opening 6 and the bottom surface of the inner shell 2 through a smooth arc.

[0025] The protruding unit includes a first protrusion 9 protruding into the inner shell 2 from the first opening 5, and the protruding unit also includes a second protrusion 10 protruding into the inner shell 2 from the second opening 6; specifically, the end of the inductor coil 4 passes through the first arc surface 7, the first opening 5 and the first protrusion 9 in sequence, the outer wall of the end of the inductor coil 4 passing through the first protrusion 9 is tightly fixedly connected to the inner wall of the first protrusion 9, and the part of the inductor coil 4 arranged in the first arc surface 7 is tightly fixedly connected to the first arc surface 7.

[0026] The inner core 3 passes through the second protrusion 10, the second opening 6, and the second arc surface 8 in sequence. The outer wall of the inner core 3 passing through the second protrusion 10 is tightly fixedly connected to the inner wall of the second protrusion 10. Specifically, the end of the inner core 3 arranged in the second arc surface 8 is tightly fixedly connected to the second arc surface 8.

[0027] The inner core 3 is made by straightening iron wire and cutting it directly. The surface is silver-plated, which makes the processing simple, efficient, and low in overall cost, and prevents deformation or breakage during the processing.

[0028] The first arc surface 7 is a first solder bath 11 for the flow of solder to make the inductor coil 4 weld more firmly; specifically, the solder flows from the first solder bath 11 and enters the first protrusion 9 through the first opening 5. The solder fills the space between the inner wall of the first protrusion 9 and the outer wall of the inductor coil 4. After fixing, the solder fills the first solder bath 11.

[0029] The second arc surface 8 is a second solder bath 12 for the flow of solder to make the inner core 3 weld more firmly; specifically, the solder flows in from the second solder bath 12 and enters the second protrusion 10 through the second opening 6. The solder fills the space between the inner wall of the second protrusion 10 and the outer wall of the inner core 3. After fixing, the solder fills the second solder bath 12.

[0030] The inner shell 2, inner core 3, and inductor coil 4 are all fixedly connected together by soldering. After inserting the ends of inductor coil 4 and inner core 3 through the first opening 5 and the second opening 6 respectively, the end of inductor coil 4 is arranged in the first protrusion 9, and the end of inner core 3 is arranged in the second protrusion 10. Finally, molten solder is poured in through the first solder bath 11 and the second solder bath 12 respectively, so that the solder flows into the first protrusion 9 through the first opening 5 via the first solder bath 11. The solder fills the space between the outer wall of inductor coil 4 and the inner wall of the first protrusion 9. At the same time, the solder on the outside fills the first solder bath 11. After the solder solidifies, the solder in the first solder bath 11 is flush with the outer wall of the inner shell 2. The solder in the first protrusion 9 fixes the end of inductor coil 4 in the first protrusion 9, making the component weld more secure and the surface smoother. The solder is less likely to flow to other positions, ensuring good solder coverage. The inner protrusion increases the contact surface, thereby ensuring good welding and reducing the likelihood of cold solder joints. The soldering method of the second solder bath 12, the second protrusion 10 and the end of the inner core 3 is the same as the soldering method of the inductor coil 4 in the first opening 5.

[0031] The outer casing 1 is covered with FEP heat-shrinkable tubing for high temperature resistance and insulation on its sides and bottom. The side wall of the outer casing 1 is provided with a notch 13 corresponding to the first molten solder bath 11.

[0032] This utility model of notch filter has a wide notch bandwidth and high suppression, making it suitable for use in products such as filters with lightning protection and high intermodulation requirements.

[0033] The advantages of this utility model are as follows: the openings on the two sides and bottom of the inner shell are all made by non-material removal punching process, so that a raised ring is formed around the opening to form a raised unit, which increases the connection surface of the connected parts. At the same time, an arc-shaped unit is formed on the outside of the opening to form a solder bath, so that the solder will not flow to other positions, ensuring that the solder and the connected parts are well covered, thereby ensuring good welding and making it less likely to have cold solder joints or false solder joints.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the existing technology, and will not be described in detail here.

[0036] The above description is only a preferred embodiment of this utility model. For those skilled in the art, various modifications and variations can be made in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A notch filter, comprising a housing and an inner housing disposed within the housing, characterized in that: The inner shell is fixedly connected to an inner core and an inductor coil. An opening unit for fixing the inner core and the inductor coil is provided on the inner shell. An arc surface unit is formed between the opening unit and the outer wall of the inner shell. The opening unit extends into the inner shell to form a protruding unit. The opening unit connects the arc surface unit and the protruding unit.

2. A notch filter according to claim 1, characterized in that: The opening unit includes a first opening on the inner shell sidewall and a second opening on the bottom of the inner shell. The arc surface unit includes a first arc surface that connects the first opening and the inner shell sidewall through a smooth arc. The arc surface unit also includes a second arc surface that connects the second opening and the bottom surface of the inner shell through a smooth arc.

3. A notch filter according to claim 2, characterized in that: The protrusion unit includes a first protrusion protruding into the inner shell from a first opening, and a second protrusion protruding into the inner shell from a second opening. The end of the inductor coil passes through the first arc surface, the first opening and the first protrusion in sequence. The outer wall of one end of the inductor coil passing through the first protrusion is tightly fixedly connected to the inner wall of the first protrusion. The portion of the inductor coil arranged in the first arc surface is tightly fixedly connected to the first arc surface.

4. A notch filter according to claim 3, characterized in that: The inner core ends pass through the second protrusion, the second opening, and the second arc surface in sequence. The outer wall of the inner core passing through the second protrusion is tightly fixedly connected to the inner wall of the second protrusion. The end of the inner core arranged in the second arc surface is tightly fixedly connected to the second arc surface.

5. A notch filter according to claim 3, characterized in that: The first arc surface is a first molten solder bath for the flow of solder to make the inductor coil weld more firmly. The solder flows in from the first molten solder bath and enters the first protrusion through the first opening. The solder fills the space between the inner wall of the first protrusion and the outer wall of the inductor coil. After fixing, the solder fills the first molten solder bath.

6. A notch filter according to claim 3, characterized in that: The second arc surface is a second molten solder bath for the flow of solder to make the inner core weld more firmly. The solder flows in from the second molten solder bath and enters the second protrusion through the second opening. The solder fills the space between the inner wall of the second protrusion and the outer wall of the inner core. After fixing, the solder fills the second molten solder bath.

7. A notch filter according to claim 5, characterized in that: The outer casing is covered with FEP heat-shrinkable tubing for high temperature resistance and insulation, and the side wall of the outer casing is provided with a notch corresponding to the first molten solder bath.

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