A filter

Abstract

The present invention relates to a filter, comprising a housing, a cover plate, a resonator and a connector. The housing has an opening. The cover plate covers the opening of the housing. The resonator is arranged in the housing and connected to the cover plate. One end of the connector is connected to the resonator, and the other end is connected to an end of the housing away from the opening, and the connector is a retractable structure. The present invention can reduce the dimensional error of the filter caused by thermal expansion and contraction, and can ensure good contact of the resonator.

Description

Technical Field

[0001] The invention belongs to the technical field of wireless communication, and in particular relates to a filter. Background Art

[0002] A filter is a filter circuit composed of capacitors, inductors and resistors. The filter can effectively filter out a specific frequency point in the power line or frequencies outside the frequency point to obtain a power signal of a specific frequency, or eliminate a power signal after a specific frequency. With the development of wireless communication technology, filters are used more and more widely. However, at high and low temperatures, the current filters will have dimensional errors due to thermal expansion and contraction, which will affect the poor contact of the filter and thus affect the performance of the filter. Summary of the invention

[0003] The present invention provides a filter, which is used to solve the technical problem of poor contact of the filter in the prior art under high and low temperature conditions.

[0004] The present invention provides a filter, comprising:

[0005] A housing having an opening;

[0006] a cover plate, the cover plate covering the opening of the shell;

[0007] a resonator, the resonator being disposed in the housing and connected to the cover plate;

[0008] A connecting piece, one end of which is connected to the resonator, and the other end of which is connected to an end of the shell away from the opening, and the connecting piece is a retractable structure.

[0009] Furthermore, the connecting piece is an elastic structure.

[0010] Furthermore, the connecting piece is made of metal.

[0011] Furthermore, the connecting member includes a supporting portion and an elastic portion, the supporting portion is detachably connected to the resonator, and the elastic portion is connected to an end of the shell away from the opening.

[0012] Furthermore, a spiral cutout is provided on the outer periphery of the elastic portion.

[0013] Furthermore, it also includes a fixing portion, which is used to fix the connecting member to an end of the shell away from the opening.

[0014] It can be seen from the above-mentioned embodiments of the present invention that the filter in the present invention includes a housing, a cover plate, a resonator and a connector. The housing has an opening. The cover plate covers the opening of the housing. The resonator is arranged in the housing and connected to the cover plate. One end of the connector is connected to the resonator, and the other end is connected to an end of the housing away from the opening, and the connector is a retractable structure. The resonator is arranged between the cover plate and the connector, and the connector is a retractable structure, so when the temperature of the filter is too high and expands, the connector will shrink. When the temperature of the filter is too low and shrinks, the connector will stretch. Therefore, the dimensional error of the filter caused by thermal expansion and contraction can be reduced, and good contact of the resonator can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 is a structural diagram of a filter in an embodiment of the present invention;

[0017] Figure 2 is a cross-sectional view of a filter according to an embodiment of the present invention;

[0018] Figure 3 is a structural diagram of a connecting member in an embodiment of the present invention;

[0019] Figure 4 FIG. 4 is a schematic diagram of a local structure of a filter in an embodiment of the present invention.

[0020] Description of main components:

[0021] 100, housing; 110, opening; 200, cover plate; 300, resonator; 400, connector; 410, support portion; 420, elastic portion; 430, spiral cutout; 500, fixing portion. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-3The present invention discloses a filter, including a housing 100, a cover plate 200, a resonator 300 and a connector 400. The housing 100 has an opening 110. The cover plate 200 covers the opening 110 of the housing 100. The resonator 300 is arranged in the housing 100 and connected to the cover plate 200. One end of the connector 400 is connected to the resonator 300, and the other end is connected to an end of the housing 100 away from the opening 110. The resonator 300 is arranged between the cover plate 200 and the connector 400, and the connector 400 is a retractable structure, so when the temperature of the filter is too high and expands, the connector 400 will shrink. When the temperature of the filter is too low and shrinks, the connector will stretch. Therefore, the dimensional error of the filter caused by thermal expansion and contraction can be reduced, and the good contact of the resonator can be ensured.

[0024] In some embodiments, the cover plate 300 and the shell 100 can be connected by screws. The cover plate 300 makes the shell 100 a closed space. The connector 400 is an elastic structure, that is, a structure that undergoes deformation, thereby achieving a retractable effect. Specifically, the connector 400 includes a support portion 410 and an elastic portion 420, the support portion 410 is detachably connected to the resonator 300, and the elastic portion 420 is connected to one end of the shell 100 away from the opening 110. A spiral cutout 430 is provided on the periphery of the elastic portion 420. Furthermore, one end of the support portion 410 is a disc structure, and the resonator 300 can be fixed in the disc. Alternatively, the support portion 410 and the resonator 300 can be snap-connected to facilitate the installation and adjustment of the resonator 300 and the connector 400.

[0025] Furthermore, the width of the spiral cut 430 is set according to the material of the spiral cut 430, and generally the width of the spiral cut is 0.3 mm to 1.5 mm. This feature can make the connector have a certain elasticity and can produce deformation. Therefore, when the temperature of the filter is too high and expands, the connector 400 will shrink. When the temperature of the filter is too low and shrinks, the connector will stretch. Therefore, the dimensional error of the filter caused by thermal expansion and contraction can be reduced, and the contact of the resonator can be guaranteed to be good. Thereby, the frequency is reduced, the volume is reduced, and the performance indicators of the filter are improved. Through the setting of the spiral cut 430, not only the connector 400 has elasticity, but also is not limited by the material. In actual production, low-cost materials can be selected. Preferably, the material of the connector 400 is metal, such as brass, iron, stainless steel, etc.

[0026] In another embodiment, the filter further includes a fixing portion 500, which is used to fix the connector 400 to the end of the housing 100 away from the opening 110. When the connector 400 is deformed, elastic force is generated, and one end of the connector 400 is detachably connected to the resonator 300, so the connector 400 and the housing 100 need to be fixed to prevent displacement. The fixing portion 500 can be a screw, which fixes the connector 400 to the end of the housing 100 away from the opening 110.

[0027] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0028] The above is a description of the technical solution provided by the present invention. For those skilled in the art, according to the ideas of the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A filter, characterized in that: include: A housing having an opening; a cover plate, the cover plate covering the opening of the shell; a resonator, the resonator being disposed in the housing and connected to the cover plate; A connecting member, one end of which is connected to the resonator, and the other end of which is connected to an end of the housing away from the opening, and the connecting member is a retractable structure; The connecting piece is an elastic structure; The connecting member comprises a supporting portion and an elastic portion, wherein the supporting portion is detachably connected to the resonator, and the elastic portion is connected to an end of the housing away from the opening; It also includes a fixing portion, which is used to fix the connecting member to an end of the shell away from the opening.

2. The filter according to claim 1, characterized in that The connecting piece is made of metal.

3. The filter according to claim 1, characterized in that The outer periphery of the elastic part is provided with a spiral cutout.

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