CN218849746U - Filter and communication device - Google Patents

Abstract

The utility model relates to the field of communication technology, a wave filter and communications facilities are provided. The filter is provided with a shell, a resonance rod and a first transmission piece, wherein the shell is provided with an accommodating cavity; the resonant rod is positioned in the accommodating cavity, and the bottom end of the resonant rod is fixedly connected with the bottom of the accommodating cavity; the first transmission piece is located in the accommodating cavity and is fixed to the resonant rod in a crimping mode. Wherein, the resonance pole is installed in the intracavity that holds of casing, passes through crimping fixed connection under external force is pressed between first transmission piece and the resonance pole, can not break away from each other under the effect that does not have external force, and easy operation avoids adopting the welding mode to appear rosin joint or desolder easily, has solved the unreliable technical problem of connection between first transmission piece and the resonance pole in the present wave filter to the connection reliability between first transmission piece and the resonance pole has been improved.

Description

Filter and communication device

Technical Field

The utility model belongs to the technical field of the communication technology and specifically relates to a wave filter and communications facilities are related to.

Background

A filter is a frequency selection device that can provide minimum attenuation to signals in some frequency ranges to allow the information to pass smoothly, and provide great attenuation to signals in other frequencies to prevent the information from passing as much as possible, thereby selecting the desired signal frequency.

The filter generally includes a resonance rod and a transmission structure having a signal transmission function. The transmission structure and the resonance rod are fixed by welding. However, the soldering operation between the transmission structure and the resonant rod is complicated, and the soldering point often causes a cold solder joint due to improper operation, thereby causing the failure of the filter product. Particularly, when a filter product has a plurality of welding positions, if the meeting space is small, and the distance between two adjacent welding points is short, the welding points are easy to generate the phenomenon of off-welding.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wave filter and communication equipment aims at solving the unreliable technical problem of connection between the signal transmission structure in the current wave filter and the resonance bar.

In a first aspect, the present application provides a filter comprising:

a housing having a receiving cavity;

the resonance rod is positioned in the accommodating cavity, and the bottom end of the resonance rod is fixedly connected with the bottom of the accommodating cavity;

the first transmission piece is located in the accommodating cavity and is fixed to the resonant rod in a crimping mode.

In one embodiment, the first transmission member has a crimp collar by which the first transmission member is fixedly sleeved on the resonance rod.

In one embodiment, the crimp collar and the outer wall of the resonant rod are an interference fit.

In one embodiment, the outer wall of the resonant rod is provided with a pressing groove, and the pressing collar is fixedly sleeved on the resonant rod and embedded in the pressing groove.

In one embodiment, the resonance rod has a crimping hole, and the first transmission member has a crimping projection which is crimped and fixed in the crimping hole.

In one embodiment, the resonance lever has a press-fit projection, and the first transmission member has a press-fit hole in which the press-fit projection is press-fitted and fixed.

In one embodiment, the resonant rod comprises a rod body and a capacitor loading disc, the bottom end of the rod body is fixedly connected with the bottom of the accommodating cavity, and the capacitor loading disc is arranged at the top end of the rod body.

In one embodiment, the capacitor loading plate has the crimp holes and/or the capacitor loading plate has the crimp lugs.

In one embodiment, the crimp lugs and the crimp holes are interference fit.

In one embodiment, the filter further includes a second transmission member located in the accommodation cavity, and the first transmission member and the second transmission member are fixed by crimping.

In one embodiment, the bottom of the accommodating cavity is provided with a connecting boss, the resonance rod is provided with a resonance hole extending from the top end of the resonance rod to the bottom end of the resonance rod, the bottom end of the resonance rod is provided with a connecting hole communicated with the resonance hole, the connecting boss is provided with a threaded hole, and the filter further comprises a fastener, wherein the fastener is arranged in the connecting hole and the threaded hole in a penetrating manner so as to fixedly connect the bottom end of the resonance rod with the connecting boss.

In a second aspect, the present application provides a communication device comprising a filter as described in any of the above.

The utility model provides a wave filter and communication equipment's beneficial effect is: the bottom of resonance pole and the bottom fixed connection who holds the chamber, the realization is installed in the intracavity that holds of casing, press down through crimping fixed connection at external force between first transmission piece and the resonance pole, can not break away from each other under the effect that does not have external force, avoid adopting the welding mode to appear rosin joint or desolder easily, it is more simple and convenient to compare welding operation, the unreliable technical problem of connection between first transmission piece and the resonance pole in the present wave filter has been solved, thereby the connection reliability between first transmission piece and the resonance pole has been improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a filter according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the filter of FIG. 1 with the cover removed;

FIG. 3 is an exploded view of the filter of FIG. 2;

FIG. 4 is a cross-sectional view of the filter of FIG. 1;

FIG. 5 is a schematic view of the crimping of the first transmission member and the resonating bar;

fig. 6 is a schematic view of a further crimping of the first transmission member and the resonant bar;

fig. 7 is a schematic view of another crimping of the first transmission member and the resonant bar;

FIG. 8 is a further view from FIG. 7;

fig. 9 is a further view of fig. 7.

Wherein, in the figures, the respective reference numerals:

100. a housing; 101. an accommodating chamber; 102. connecting the bosses; 103. a threaded hole; 110. a housing body; 120. a cover plate; 121. mounting holes;

200. a resonant rod; 201. a resonant aperture; 202. connecting holes; 203. a pressing groove; 210. a rod body; 220. a capacitive load plate; 221. crimping holes;

300. a first transmission member; 310. crimping the lantern ring; 320. pressing the bump;

400. a fastener;

510. a frequency modulation screw; 520. a frequency modulation nut; 530. a signal port;

600. a second transport member.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The filter and the communication device in the embodiment of the present invention will now be described.

Example one

Referring to fig. 1 to 3, the filter includes a housing 100, a resonance bar 200, and a first transmission member 300. The housing 100 has a receiving cavity 101. In the illustrated embodiment, the bottom of the receiving cavity 101 is provided with a connection boss 102.

Specifically, referring to fig. 4, the case 100 includes a case body 110 and a cover plate 120, the case body 110 having a top opening, and the cover plate 120 closing the top opening of the case body 110. The cover plate 120 and the case body 110 enclose the receiving chamber 101 to protect the resonance bar 200 and the first transmission member 300 located inside the receiving chamber 101.

In the illustrated embodiment, the cover plate 120 is detachably mounted to the top of the case body 110. Bolts are inserted through the top of the cover plate 120 and the top of the housing body 110 to connect the two. The case body 110 includes a bottom plate and side plates surrounding the periphery of the bottom plate. The housing body 110 may be integrally formed, or may be formed by separately connecting a bottom plate and each side plate. The base plate is provided with the coupling boss 102. The bottom of the four side plates are connected to the four sides of the bottom plate, and the top of the four side plates are connected to the cover plate 120.

Referring to fig. 2 and 3, the resonant rod 200 is located in the accommodating chamber 101, and the bottom end of the resonant rod 200 is fixedly connected to the bottom of the accommodating chamber 101. Specifically, the resonant rod 200 is a metal rod, but of course, in some other embodiments, the resonant rod 200 may also be a ceramic dielectric resonant rod or a dielectric resonant rod made of other materials. The resonant rod 200 may be a hollow resonant rod or a solid resonant rod, which is not limited in the present application; the resonant rod 200 may be integrally formed with the housing 100 of the filter, or may be separately connected with the housing 100 of the filter, which is not limited in this application; the cross section of the resonant rod 200 may be circular, elliptical, square, polygonal, irregular, etc., which is not limited in this application; the resonant tank 200 may or may not have a capacitive loading disc 220, which is not limited by this application. In the illustrated embodiment, the resonant rod 200 is a cylindrical hollow resonant rod, and the resonant rod 200 includes a rod body 210 and a capacitor loading plate 220.

The first transmission member 300 is located in the accommodation cavity 101, and the first transmission member 300 is press-fitted and fixed to the resonance rod 200. The first transmission element 300 may be a sheet structure having a signal transmission function or a signal processing function, such as a tap piece, a connection piece, a coupling piece, a low-pass piece, a flying bar piece, and the like in a filter, for example, the first transmission element 300 may be a tap piece connected between the resonant rod 200 and the signal port 530 for transmitting signals, the first transmission element 300 may also be a coupling piece connected between the two resonant rods 200 for coupling the two resonant rods 200, the first transmission element 300 may also be a low-pass piece connected between the resonant rod 200 and the signal port 530 for enhancing suppression, and the like, and the specific application and the specific installation position of the first transmission element 300 are not particularly limited; the shape of the first transmission member 300 may be a straight line, a bent shape, a strip line, an arc shape, an irregular shape, and the like, and the application does not limit the specific shape of the first transmission member 300. The first transmission member 300 may be fixed to the resonance rod 200 by crimping at an end portion thereof, may be fixed to the resonance rod 200 by crimping at a middle portion thereof, or may be fixed to the resonance rod 200 by crimping at an arbitrary position thereof, and a position of the first transmission member 300 for crimping to the resonance rod 200 is not limited. First transmission element 300 may be rod 210 fixed to resonant rod 200 by crimping, or may be capacitor loading plate 220 fixed to resonant rod 200 by crimping, or may be both rod 210 fixed to resonant rod 200 and capacitor loading plate 220 of resonant rod 200 by crimping, and therefore, there is no need to limit the number of components. In the illustrated embodiment, the first transmission member 300 is a tab, and is bent, and one end of the first transmission member 300 is fixed to the resonant rod 200 by pressing.

The utility model provides a filter, the bottom of resonance bar 200 and the bottom fixed connection who holds chamber 101, realize that resonance bar 200 stabilizes and install in the chamber 101 that holds of casing 100, press down through crimping fixed connection at the external force between first transmission piece 300 and the resonance bar 200, can not break away from each other under the effect of external force not having, avoid adopting the welding mode rosin joint or desolder to appear easily, the insecure technical problem of being connected between first transmission piece 300 and the resonance bar 200 in the current filter has been solved, thereby the connection reliability between first transmission piece 300 and the resonance bar 200 has been improved.

In particular, the filter is a cavity filter.

In one embodiment, referring to fig. 4, the filter further includes a second transmission member 600, the second transmission member 600 is located in the accommodating cavity 101, and the first transmission member 300 is fixed to the second transmission member 600 by crimping. The second transmission member 600 may be selected as a tap piece, and the second transmission member 600 is used for fixedly connecting with the inner conductor of the connector of the signal port 530. In some other embodiments, the second transmission element 600 may also be selected as a connecting rod, which is the inner conductor of the connector of the signal port 530. Of course, it is understood that the second transmission member 600 is not limited to a sheet structure, but may be a rod structure, a pillar structure, a wire structure, etc., and is not limited thereto. Therefore, the first transmission piece 300 is fixedly connected with the resonance rod 200 through crimping under external force pressing, the first transmission piece 300 is fixedly connected with the second transmission piece 600 through crimping under external force pressing, the first transmission piece 300 and the resonance rod 200 and the first transmission piece 300 and the second transmission piece 600 cannot be separated from each other under the condition of no external force, insufficient soldering or desoldering easily caused by adopting a soldering mode is avoided, and the connection reliability among the resonance rod 200, the first transmission piece 300 and the second transmission piece 600 is improved.

In one embodiment, referring to fig. 4 and 5, the bottom of the accommodating cavity 101 is provided with a connecting boss 102, and the bottom end of the resonant rod 200 is fixedly connected with the connecting boss 102. Based on this, the contact area between the bottom end of the resonance rod 200 and the shell 100 can be reduced, so that the contact is more uniform, and the interference to signals is reduced; the problem that the resonance rod 200 cannot be installed or is installed unstably due to the fact that the wall thickness of the bottom plate of the shell 100 is insufficient can also be avoided; meanwhile, the height of the resonant rod 200 in the accommodating cavity 101 can be relatively raised, so that the resonant frequency generated by the resonant rod 200 is optimized, and the filter has better performance indexes.

The resonance rod 200 has a resonance hole 201 extending from the top end of the resonance rod 200 toward the bottom end of the resonance rod 200, the bottom end of the resonance rod 200 has a connection hole 202 communicating with the resonance hole 201, and the connection boss 102 has a screw hole 103. The filter further comprises a fastener 400, and the fastener 400 is inserted into the connecting hole 202 and the threaded hole 103 to fixedly connect the bottom end of the resonance rod 200 with the connecting boss 102.

Wherein the fastening member 400 is inserted into the connection hole 202 and the screw hole 103 from the top of the resonance bar 200 through the resonance hole 201. Specifically, the fastener 400 is a screw.

In the illustrated embodiment, the resonant hole 201 does not extend through the resonant rod 200. The diameter of the resonance hole 201 is larger than the outer diameter of the head of the fastener 400, so that the fastener 400 as a whole can freely enter and exit the resonance hole 201. The bore diameter of the connection hole 202 is greater than or equal to the outer diameter of the shank of the fastener 400, but less than the outer diameter of the head of the fastener 400.

Referring to fig. 5, when the resonant rod 200 has a rod 210 and a capacitor loading plate 220, the bottom end of the rod 210 is fixedly connected to the connection boss 102, and the capacitor loading plate 220 is disposed at the top end of the rod 210. In the illustrated embodiment, the rod 210 has a resonant hole 201, a rounded transition is provided at the junction of the capacitive loading disc 220 and the rod 210, and the capacitive loading disc 220 and the rod 210 are integrally formed. Of course, in some other embodiments, the rod 210 may be a solid rod without the resonant hole 201, and the capacitive loading plate 220 may be integrally formed with the rod 210 or may be separately connected by welding, crimping, screwing, or the like.

In one embodiment, referring to fig. 3 and 4, the cover plate 120 has a mounting hole 121, the mounting hole 121 and the connecting boss 102 are located in the same vertical direction, the filter further includes a frequency adjusting screw 510 and a frequency adjusting nut 520, the frequency adjusting nut 520 is mounted at the mounting hole 121, and the frequency adjusting screw 510 is vertically adjustably inserted into the frequency adjusting nut 520 and the mounting hole 121. The adjustment of the frequency of the filter can be accomplished by rotational adjustment of the frequency adjustment screw 510 and the frequency adjustment nut 520.

In the illustrated embodiment, the mounting hole 121 and the threaded hole 103 of the attachment boss 102 are located in the same vertical direction. The fm nut 520 is fixed to the top end surface of the mounting hole 121. Specifically, the fm nut 520 is welded to the top of the cover plate 120 and is located directly above the mounting hole 121. A frequency adjustment nut 520 is threadably engaged with frequency adjustment screw 510. FM screw 510 may be threadably engaged with mounting hole 121, in which case mounting hole 121 is internally threaded. FM screw 510 also may not be in threaded engagement with mounting hole 121, at this time, the hole wall of mounting hole 121 is smooth, and the aperture of mounting hole 121 is greater than the outside diameter of FM screw 510.

In one embodiment, referring to fig. 4, the filter further includes a signal port 530 mounted on the housing 100, one end of the first transmission member 300 is electrically connected to the signal port 530, and the other end of the first transmission member 300 is fixed to the resonant rod 200 by pressing. In operation of the filter, a signal is transmitted to the first transmission member 300 through the signal port 530 and then transmitted to the resonance bar 200 through the first transmission member 300 to generate resonance, thereby filtering out other unwanted signals and obtaining a desired signal.

In the illustrated embodiment, the cover plate 120 has through holes for mounting the signal ports 530. The signal port 530 is mounted on the cover plate 120.

It should be noted that, the first transmission member 300 is fixed to the resonant rod 200 by pressing, which means that the first transmission member 300 or the resonant rod 200 is firmly connected under the pressing of an external force, and the two are difficult to separate without the external force, so that the two are firmly connected and the connection is reliable.

In this embodiment, referring to fig. 5, the first transmission member 300 has a crimp collar 310, and the first transmission member 300 is fixedly sleeved on the resonant rod 200 by the crimp collar 310. The crimp collar 310 is fixedly sleeved on the resonant rod 200 under the action of external force, so that the first transmission member 300 and the resonant rod 200 are reliably and fixedly connected. In the illustrated embodiment, the crimp collar 310 is located at an end of the first transmission member 300, it being understood that in other embodiments, the crimp collar 310 may be located in the middle or other location of the first transmission member 300.

In one embodiment, the through hole in the middle of the crimp collar 310 is sleeved on the outer wall of the resonant rod 200. When the resonant rod 200 has the rod body 210 and the capacitor loading disc 220, the crimping sleeve ring 310 may be sleeved on the outer wall of the rod body 210 of the resonant rod 200, and the crimping sleeve ring 310 may also be sleeved on the outer wall of the capacitor loading disc 220 of the resonant rod 200; the crimp collar 310 may be sleeved on the outer wall of the rod body 210 of the resonant rod 200, or may be sleeved on the outer wall of the capacitor loading plate 220 of the resonant rod 200.

In the illustrated embodiment, the resonance rod 200 is a cylindrical resonance rod, and accordingly, the through hole in the middle of the crimp collar 310 is adapted as a circular hole, and the through hole in the middle of the crimp collar 310 is sleeved on the outer wall of the resonance rod 200. Specifically, the crimp collar 310 is sleeved on the outer wall of the rod body 210 of the resonant rod 200. The aperture of the through hole of the crimping sleeve ring 310 is 2 mm-5 mm smaller than the outer diameter of the rod body 210.

Specifically, the crimping sleeve ring 310 is in interference fit with the outer wall of the resonant rod 200, so that the crimping sleeve ring 310 is sleeved on the resonant rod 200 in interference fit under the action of external force, and the crimping sleeve ring 310 is difficult to detach from the resonant rod 200 without the action of external force, thereby ensuring that the crimping sleeve ring and the resonant rod are reliably and fixedly connected.

Alternatively, the outer diameter of the resonance bar 200 is gradually increased from bottom to top. The bottom external diameter of resonance pole 200 is less than the aperture of the through-hole of crimping lantern ring 310, and the crimping lantern ring 310 of being convenient for cup joints resonance pole 200, and then, under the exogenic action, crimping lantern ring 310 moves towards resonance pole 200's top gradually, and the two is turned into interference fit by clearance fit, and it can't continue to move up to crimping lantern ring 310 to realize reliably fixed connection between first transmission piece 300 and resonance pole 200.

Optionally, the outer diameter of the rod body 210 of the resonance rod 200 is constant, and the outer diameter of the rod body 210 is larger than the aperture of the through hole of the crimp collar 310. At this time, the bottom end of the resonant rod 200 may be provided with a chamfer so that the crimp collar 310 is positioned to nest the resonant rod 200.

Alternatively, the outer wall of the resonance bar 200 may be smooth or rough. When the outer wall of the resonance rod 200 is rough, the friction between the outer wall of the resonance rod 200 and the crimp collar 310 is increased, which is advantageous for the secure sleeving of the two. Specifically, the surface roughness Ra =100 of the rod body 210 of the resonance rod 200.

In some other embodiments, the resonance rod 200 is a polygonal resonance rod, an elliptical resonance rod, or an irregular resonance rod, and accordingly, the through hole in the middle of the crimp collar 310 is adapted to be a polygonal hole, an elliptical hole, or an irregular hole, respectively.

Example two

The first transmission member 300 is fixed to the resonance rod 200 by pressure welding in many ways.

Referring to fig. 6, a compression groove 203 is formed on an outer wall of the resonant rod 200, and a compression collar 310 is fixedly coupled to the resonant rod 200 and is inserted into the compression groove 203. Specifically, the outer diameter of the resonance bar 200 is larger than the inner diameter of the through hole of the crimp collar 310 of the first transmission member 300. For example, when the crimp ring 310 is fixedly sleeved on the rod body 210 of the resonant rod 200, the outer diameter of the rod body 210 of the resonant rod 200 is 2mm to 5mm larger than the inner diameter of the through hole of the crimp ring 310; when the crimping sleeve 310 is fixedly sleeved on the capacitor loading disc 220 of the resonant rod 200, the outer diameter of the capacitor loading disc 220 is 2 mm-4 mm larger than the inner diameter of the through hole of the crimping sleeve 310. The outer diameter of the groove bottom of the crimp groove 203 is smaller than or equal to the inner diameter of the through hole of the crimp collar 310. The crimping lantern ring 310 is embedded into the crimping groove 203 under the pressing of an external force, so that the reliable fixed connection between the first transmission piece 300 and the resonance rod 200 is realized, and the crimping groove 203 is formed in the outer wall of the resonance rod 200, so that the relative position between the first transmission piece 300 and the resonance rod 200 cannot be changed after the first transmission piece 300 is crimped and fixed with the resonance rod 200, namely, the relative position between the first transmission piece 300 and the resonance rod 200 can be determined well in advance through the position of the preset crimping groove 203, and the specific mode is as follows: before crimping, the position of the first transmission piece 300 to be fixed is designed in advance through means such as simulation and structural cavity arrangement, the position of the crimping groove 203 is designed, the crimping position of the first transmission piece 300 is limited in the crimping process, instability of the filter index caused by the fact that the position cannot be determined is avoided, and the first transmission piece 300 and the resonant rod 200 are prevented from repeatedly adjusting the relevant index of the filter after being crimped and fixed.

In the illustrated embodiment, the thickness of the crimp collar 310 is equal to or less than the width of the crimp slot 203. The pressing groove 203 surrounds the outer wall of the resonance bar 200 by one turn. The pressing groove 203 is located at the rod body 210 of the resonance rod 200.

The filter in the second embodiment is different from the filter in the first embodiment in the press-fit manner between the first transmission member 300 and the resonant rod 200, and the rest of the structures are the same, and are not described again.

EXAMPLE III

Fig. 7 is a schematic diagram of crimping of the resonant bar 200 and the first transmission member 300 according to the third embodiment. Fig. 8 is another view of fig. 7 to show the top structure of the resonance bar 200. Fig. 9 is another view of fig. 7 to show the bottom structure of the resonant bar 200.

Referring to fig. 7 to 9, the resonant lever 200 has a crimping hole 221, and the first transmission member 300 has a crimping boss 320, and the crimping boss 320 is crimped and fixed in the crimping hole 221. In other words, the crimping projections 320 are fitted into the crimping holes 221 under the pressing of the external force, and the crimping projections 320 are difficult to be disengaged from the crimping holes 221 without the external force, achieving a reliable fixed crimping between the first transmission member 300 and the resonance lever 200. In the illustrated embodiment, one end of the first transmission member 300 has a crimping projection 320, and it is understood that the position of the crimping projection 320 on the first transmission member 300 is not limited, and in other embodiments, the crimping projection 320 may be located in the middle of the first transmission member 300.

Referring to fig. 7, the resonant rod 200 includes a rod body 210 and a capacitor loading plate 220, wherein the bottom end of the rod body 210 is fixedly connected to the connection boss 102, the capacitor loading plate 220 is disposed at the top end of the rod body 210, and the capacitor loading plate 220 has a press-contact hole 221. The crimping hole 221 is formed in the capacitor loading plate 220, so that external force pressing is facilitated, and the crimping protrusion 320 is pressed into the crimping hole 221.

In the illustrated embodiment, the capacitive load disk 220 is circular and perpendicular to the stem 210. The capacitive load plate 220 is horizontally disposed. The area of the capacitive loading plate 220 is larger than the area of the bottom end of the rod body 210. The center of the crimp hole 221 is spaced from the edges of the capacitive loading disc 220 (i.e., the outer diameter edge and the inner diameter edge of the capacitive loading disc 220) by a distance greater than or equal to 1.5 times the radius of the crimp hole 221. The end of the first transmission member 300 near the resonance bar 200 is rounded. The outer diameter of the end of the first transmission member 300 near the resonance bar 200 is greater than the width of the middle of the first transmission member 300. The crimping projection 320 is located at the top of the end of the first transmission member 300 near the resonance bar 200 so that an external force is applied to the bottom of the end of the first transmission member 300 to press the crimping projection 320 into the crimping hole 221.

It should be noted that, the resonant rod 200 and the first transmission member 300 are fixed by crimping through the crimping hole 221 and the crimping projection 320, the crimping hole 221 may be disposed on the resonant rod 200, and may also be disposed on the first transmission member 300, and similarly, the crimping projection 320 may be disposed on the resonant rod 200, and may also be disposed on the first transmission member 300. For example, in other embodiments, the resonance lever 200 has the crimping projection 320, and the first transmission member 300 has the crimping hole 221, and the crimping projection 320 is crimped and fixed in the crimping hole 221. Specifically, the capacitor loading plate 220 has a pressing protrusion 320, which facilitates pressing by external force, and realizes pressing of the pressing protrusion 320 into the pressing hole 221 of the first transmission member 300.

Specifically, the crimp lugs 320 and the crimp holes 221 are interference fit. For example, the outer diameter of the crimp protrusion 320 is larger than the diameter of the crimp hole 221 by 1mm to 3mm.

Alternatively, the crimp lugs 320 are cylindrical and the crimp holes 221 are cylindrical. The outer diameter of the crimp protrusion 320 gradually increases from top to bottom, or the diameter of the crimp hole 221 gradually decreases from top to bottom.

Specifically, the outer wall of the crimp lug 320 may be smooth or rough. The wall of the crimp hole 221 may be smooth or rough.

Specifically, the crimping projections 320 are cylindrical projections, and the crimping holes 221 are circular crimping holes, so that alignment is performed during crimping, and meanwhile, resistance applied during crimping is relatively small, and crimping operation is easier. It is understood that in other embodiments, the pressing protrusions 320 are polygonal protrusions, elliptical protrusions or irregular protrusions, and correspondingly, the pressing holes 221 are polygonal pressing holes, elliptical pressing holes or irregular pressing holes matched with the pressing protrusions 320.

The filter in the third embodiment is different from the filter in the first embodiment in the press-fit manner between the first transmission member 300 and the resonant rod 200, and the rest of the structures are the same, and are not described again.

Example four

There is provided a communication device comprising a filter according to any of the above. The communication device may be a base station, a wireless transmission tower, or the like, but is not limited thereto, and may also be any other communication device that needs to use a filter.

Since the communication device provided in the embodiment of the present application employs the above-mentioned filter, the communication device also has the technical effects brought by the technical solutions of the filters in any of the above-mentioned embodiments, and details are not described here again.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. A filter, comprising:

a housing having a receiving cavity;

the resonance rod is positioned in the accommodating cavity, and the bottom end of the resonance rod is fixedly connected with the bottom of the accommodating cavity;

the first transmission piece is located in the accommodating cavity and is fixed to the resonant rod in a crimping mode.

2. The filter of claim 1, wherein: the first transmission piece is provided with a crimping sleeve ring, and the first transmission piece is fixedly sleeved on the resonance rod through the crimping sleeve ring.

3. The filter of claim 2, wherein: and the crimping sleeve ring is in interference fit with the outer wall of the resonance rod.

4. The filter of claim 2, wherein: the outer wall of the resonance rod is provided with a pressing groove, and the pressing sleeve ring is fixedly sleeved on the resonance rod and embedded into the pressing groove.

5. The filter of claim 1, wherein: the resonance rod is provided with a crimping hole, the first transmission piece is provided with a crimping lug, and the crimping lug is fixed in the crimping hole in a crimping mode; and/or

The resonance rod has a crimping projection, and the first transmission member has a crimping hole in which the crimping projection is crimped and fixed.

6. The filter of claim 5, wherein: the resonance rod comprises a rod body and a capacitor loading disc, the bottom end of the rod body is fixedly connected with the bottom of the accommodating cavity, and the capacitor loading disc is arranged at the top end of the rod body;

the capacitor loading plate is provided with the crimping holes, and/or the capacitor loading plate is provided with the crimping lugs.

7. The filter of claim 5, wherein: the crimping lug is in interference fit with the crimping hole.

8. The filter according to any one of claims 1 to 7, characterized in that: the filter further comprises a second transmission piece, the second transmission piece is located in the containing cavity, and the first transmission piece and the second transmission piece are fixedly connected in a pressing mode.

9. The filter according to any one of claims 1 to 7, characterized in that: the bottom that holds the chamber is equipped with the connection boss, the resonance pole have certainly the top orientation of resonance pole the resonance hole that the bottom of resonance pole extends, the bottom of resonance pole have with the connecting hole of resonance hole intercommunication, it has the screw hole to connect the boss, the wave filter still includes the fastener, the fastener is worn to locate the connecting hole with in the screw hole, with will the bottom of resonance pole with connect boss fixed connection.

10. A communication device, characterized by: the communication device comprising a filter according to any one of claims 1 to 9.

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