CN114421924B - Broadband impedance element type surface acoustic wave filter - Google Patents
Broadband impedance element type surface acoustic wave filter Download PDFInfo
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- CN114421924B CN114421924B CN202210327566.XA CN202210327566A CN114421924B CN 114421924 B CN114421924 B CN 114421924B CN 202210327566 A CN202210327566 A CN 202210327566A CN 114421924 B CN114421924 B CN 114421924B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
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- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to a broadband impedance element type surface acoustic wave filter, which comprises: surface acoustic wave filter chip, shell, terminal, be provided with the surface acoustic wave filter chip in the shell, a plurality of terminal one end with the surface acoustic wave filter chip is connected, and a plurality of terminal other ends extend to outside the shell, the terminal with the shell is connected, be provided with a plurality of louvres on the outer wall of shell. The invention aims to provide a broadband impedance element type surface acoustic wave filter with high heat dissipation efficiency and high cleaning efficiency.
Description
Technical Field
The invention belongs to the technical field of filters, and particularly relates to a broadband impedance element type surface acoustic wave filter.
Background
A Surface Acoustic Wave (SAW) filter is called a SAW filter for short, and a surface acoustic wave is an elastic wave propagating along the surface of an object. The surface acoustic wave filter is an elastic wave that is generated and propagated on the surface of a piezoelectric substrate material and whose amplitude rapidly decreases as the depth into the substrate material increases. The basic structure of the SAW filter is to fabricate two acoustoelectric transducers-interdigital transducers, which are used as a transmitting transducer and a receiving transducer respectively, on a polished surface of a substrate material with piezoelectric characteristics.
The invention discloses a broadband impedance element type surface acoustic wave filter, and the application number is 201310697600.3, and the invention introduces a method that two or more surface acoustic wave filter units with a certain frequency difference are connected in parallel, and simultaneously, in order to eliminate the frequency response change of each filter unit caused by impedance mismatch, a surface acoustic wave resonator with high impedance characteristic is respectively connected in series at the input end and the output end of each filter unit, so that the filter units are isolated, the frequency response distortion of each filter unit caused by impedance mismatch is eliminated, and the bandwidth of the filter is improved. However, due to the parallel connection of a plurality of saw filter units and the serial connection of saw resonators with high impedance characteristics, the power of the circuit is increased, a large amount of heat is generated during operation, and if the heat dissipation is not timely, the working efficiency of the filter is affected, and even the filter is burnt.
Disclosure of Invention
Therefore, the invention aims to solve the problems that in the prior art, a filter generates a large amount of heat during working, and if the heat is not dissipated timely, the working efficiency of the filter is influenced, and even the filter is burnt.
Therefore, the technical scheme adopted by the invention is that the broadband impedance element type surface acoustic wave filter comprises: surface acoustic wave filter chip, shell, terminal, be provided with the surface acoustic wave filter chip in the shell, a plurality of terminal one end with the surface acoustic wave filter chip is connected, and a plurality of terminal other ends extend to outside the shell, the terminal with the shell is connected, be provided with a plurality of louvres on the outer wall of shell.
Preferably, the heat dissipation holes are provided with dust filtration nets.
Preferably, a heat dissipation device is disposed in the housing, and the heat dissipation device includes: the fan comprises a fixed shaft, a rotating block, a fixed gear, a double-output-shaft motor, a gear, a sliding chute, a sliding block, a screw rod, a first fan, a rotating shaft, a second fan, an L-shaped connecting rod and a wind plate, wherein the shell is cylindrical, the fixed shaft is arranged in the shell, one end of the fixed shaft is connected with the circle center of the inner wall of the shell, the other end of the fixed shaft is rotatably connected with the rotating block, the fixed gear is arranged on the fixed shaft, the double-output-shaft motor is arranged on the side wall of the rotating block, a first output shaft of the double-output-shaft motor is connected with the gear, the gear is meshed with the fixed gear, the rotating block is provided with the sliding chute extending along the horizontal direction, the sliding chute is connected with the sliding block in a sliding mode, a second output shaft of the double-output-shaft motor is connected with one end of the screw rod, the other end of the screw rod penetrates through the sliding chute to be connected with the first fan, and the screw rod penetrates through the sliding block, and with slider threaded connection, the pivot is provided with in the commentaries on classics piece one side axle center department of keeping away from the fixed gear, pivot one end with the commentaries on classics piece is connected, the pivot other end is connected with the second fan, L shape connecting rod one end with the slider is connected, the L shape connecting rod other end is connected with the aerofoil, the aerofoil is towards the surface acoustic wave filter chip.
Preferably, an opening is provided on an outer wall of the housing.
Preferably, a cover plate is arranged on the opening, and the cover plate is connected with the outer wall of the shell through screws.
Preferably, be provided with temperature sensor and treater on the inner wall of shell, temperature sensor with treater electric connection, the treater with dual output shaft motor wireless communication.
Preferably, the dust removing device further comprises a dust removing device, wherein the dust removing device comprises: the device comprises a box body, an outlet, a sliding rail, a first sliding block, a second sliding block, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a motor, a crank, a first connecting column, a second connecting column, a dust sweeping brush, a collision block and an elastic lug, wherein the box body is arranged on the inner wall of the shell close to the binding post, the outlet is arranged on the outer wall of the box body close to the sound surface filter chip, the sliding rail is arranged on the inner wall of the box body and is vertical to the binding post, the first sliding block and the second sliding block are arranged on the sliding rail at intervals, the first sliding block and the second sliding block can slide on the sliding rail in a reciprocating manner, the center of the first sliding block is respectively hinged with one end of the first connecting rod and one end of the second connecting rod, the other end of the second connecting rod is hinged with one end of the third connecting rod, the other end of the third connecting rod is hinged with one end of the fourth connecting rod, and the first connecting rod is parallel to the third connecting rod, the second connecting rod with the fourth connecting rod is parallel, the fourth connecting rod other end the first connecting rod other end is articulated with first spliced pole one end respectively, the right side of slide rail is provided with the motor, the motor with box inner wall is connected, the output shaft and the crank one end of motor are connected, the second connecting rod with the articulated department of third connecting rod is articulated with the crank other end, and the first spliced pole other end is connected with second spliced pole one end is perpendicular, and the second spliced pole other end is connected with the sweeping brush, the sweeping brush orientation sound surface filter chip, the both ends of slide rail are provided with the bump respectively, first slider the second slider orientation one side of bump is provided with elastic convex block, elastic convex block can with the bump contact.
Preferably, a dust storage box is arranged on the bottom wall of the box body and is positioned below the dust sweeping brush.
Preferably, a box door is arranged on the dust storage box.
Preferably, one side of the box door is hinged with the dust storage box, and a sealing ring is arranged on the box door.
The technical scheme of the invention has the following advantages: the invention relates to a broadband impedance element type surface acoustic wave filter, comprising: surface acoustic wave filter chip, shell, terminal, be provided with the surface acoustic wave filter chip in the shell, a plurality of terminal one end with the surface acoustic wave filter chip is connected, and a plurality of terminal other ends extend to outside the shell, the terminal with the shell is connected, be provided with a plurality of louvres on the outer wall of shell. The binding post is used for being connected with an external circuit, and heat generated by the surface acoustic wave filter chip during working is discharged through the plurality of heat dissipation holes, so that the ambient temperature around the filter is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a prior art diagram;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a side view of the housing of the present invention;
FIG. 4 is a schematic view showing the construction of a dust removing apparatus according to the present invention;
FIG. 5 is a schematic view of the attachment of the sweeper brush of the present invention;
wherein, 1-sound surface filter chip, 2-shell, 3-binding post, 4-heat dissipation hole, 5-dust filtering net, 6-fixed shaft, 7-rotating block, 8-fixed gear, 9-double output shaft motor, 10-gear, 11-chute, 12-slide block, 13-screw, 14-first fan, 15-rotating shaft, 16-second fan, 17-L-shaped connecting rod, 18-wind plate, 19-opening, 20-cover plate, 21-temperature sensor, 22-processor, 23-first gear, 24-box, 25-outlet, 26-slide rail, 27-first slide block, 28-second slide block, 29-first connecting rod, 30-second connecting rod, 31-third connecting rod, 32-a fourth connecting rod, 33-a motor, 34-a crank, 35-a first connecting column, 36-a second connecting column, 37-a dust sweeping brush, 38-an impact block, 39-an elastic bump, 40-a dust storage box and 41-a box door.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the 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 is therefore not to be construed as limiting the 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 description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
As shown in fig. 2 to 3, a broadband impedance element type surface acoustic wave filter according to the present invention includes: surface acoustic wave filter chip 1, shell 2, terminal 3, be provided with surface acoustic wave filter chip 1 in the shell 2, 3 one ends of a plurality of terminals with surface acoustic wave filter chip 1 is connected, and the 3 other ends of a plurality of terminals extend to outside the shell 2, terminal 3 with shell 2 is connected, be provided with a plurality of louvres 4 on the outer wall of shell 2.
The working principle and the beneficial technical effects of the technical scheme are as follows: the binding post 3 is used for being connected with an external circuit, and heat generated by the surface acoustic wave filter chip 1 during working is discharged through the plurality of heat dissipation holes 4, so that the ambient temperature around the filter is reduced.
In one embodiment, the heat dissipation holes 4 are provided with dust filter nets 5, and the dust filter nets can reduce the entrance of dust.
In one embodiment, as shown in fig. 2-3, a heat sink is disposed within the housing 2, the heat sink comprising: the air conditioner comprises a fixed shaft 6, a rotating block 7, a fixed gear 8, a double-output-shaft motor 9, a gear 10, a sliding groove 11, a sliding block 12, a screw rod 13, a first fan 14, a rotating shaft 15, a second fan 16, an L-shaped connecting rod 17 and an air plate 18, wherein the shell 2 is cylindrical, the fixed shaft 6 is arranged in the shell 2, one end of the fixed shaft 6 is connected with the circle center of the inner wall of the shell 2, the other end of the fixed shaft 6 is rotatably connected with the rotating block 7, the fixed gear 8 is arranged on the fixed shaft 6, the double-output-shaft motor 9 is arranged on the side wall of the rotating block 7, a first output shaft of the double-output-shaft motor 9 is connected with the gear 10, the gear 10 is meshed with the fixed gear 8, the rotating block 7 is provided with the sliding groove 11 extending along the horizontal direction, the sliding block 12 is slidably connected in the sliding groove 11, and a second output shaft of the double-output-shaft motor 9 is connected with one end of the screw rod 13, the other end of the screw 13 penetrates through the sliding groove 11 to be connected with the first fan 14, the screw 13 penetrates through the sliding block 12 and is in threaded connection with the sliding block 12, a rotating shaft 15 is arranged at the axle center of one side, away from the fixed gear 8, of the rotating block 7, one end of the rotating shaft 15 is connected with the rotating block 7, the other end of the rotating shaft 15 is connected with the second fan 16, one end of an L-shaped connecting rod 17 is connected with the sliding block 12, the other end of the L-shaped connecting rod 17 is connected with an air plate 18, and the air plate 18 faces towards the SAW chip 1.
The working principle and the beneficial technical effects of the technical scheme are as follows: when the filter has large heat productivity, the double-output-shaft motor 9 is started to drive the gear 10 to rotate, the rotating block 7 is driven to rotate around the fixed shaft 6 through the meshing of the gear 10 and the fixed gear 8, and the rotating block 7 rotates to drive the second fan 16 to rotate; the double-output-shaft motor 9 drives the screw 13 and the first fan 14 to rotate, and simultaneously, the first fan 14 rotates around the fixed shaft 6 and continuously rotates along with the rotation of the rotating block 7; the double-output-shaft motor 9 drives the screw 13 to rotate, the screw 13 is in threaded connection with the sliding block 12, so that the sliding block 12 moves along the sliding groove 11, the sliding block 12 can rotate along with the rotating block 7, the air plate 18 is driven to continuously rotate around the fixed shaft 6 and move along the axial direction of the shell 2, the front side and the back side of the surface acoustic wave filter chip 1 are continuously scanned to perform intermittent air blowing, and the ambient temperature is reduced; the rotation of second fan 16 and the continuous rotation in the time of first fan 14 turnover carry out intermittent scanning to the side of SAW chip 1 and blow, reduce the ambient temperature of SAW chip 1 side to realize SAW chip on each terminal surface, carry out the intermittent type in the equidirectional not and blow, make SAW chip can more extensive dispel the heat, prevent that local heat is too high, lead to the damage of chip.
In one embodiment, as shown in fig. 2, an opening 19 is formed in an outer wall of the housing 2, a cover plate 20 is disposed on the opening 19, and the cover plate 20 is connected to the outer wall of the housing 2 through screws, so that the cover plate 20 can be conveniently opened to perform maintenance on components inside the housing 2.
In one embodiment, as shown in fig. 2, a temperature sensor 21 and a processor 22 are disposed on an inner wall of the housing 2, the temperature sensor 21 is electrically connected to the processor 22, the processor 22 is in wireless communication with the dual output shaft motor 9, the temperature sensor 21 is configured to monitor an ambient temperature inside the housing 2, and when the ambient temperature exceeds a preset warning value inside the processor 22, the dual output shaft motor 9 is started to cool down, so as to keep the filter within a normal working temperature range.
In one embodiment, as shown in fig. 4-5, further comprising a dust removing device, the dust removing device comprising: the structure comprises a box body 24, an outlet 25, a slide rail 26, a first slide block 27, a second slide block 28, a first connecting rod 29, a second connecting rod 30, a third connecting rod 31, a fourth connecting rod 32, a motor 33, a crank 34, a first connecting column 35, a second connecting column 36, a dust sweeping brush 37, a collision block 38 and an elastic bump 39, wherein the box body 24 is arranged on the inner wall of the shell 2 close to the binding post 3, the outlet 25 is arranged on the outer wall of the box body 24 close to the surface acoustic filter chip 1, the slide rail 26 is arranged on the inner wall of the box body 24, the slide rail 26 is vertical to the binding post 3, the first slide block 27 and the second slide block 28 are arranged on the slide rail 26 at intervals, the first slide block 27 and the second slide block 28 can slide on the slide rail 26 in a reciprocating manner, the center of the first slide block 27 is hinged with one end of the first connecting rod 29 and one end of the second connecting rod 30, the other end of the second connecting rod 30 is hinged with one end of the third connecting rod 31, the other end of the third connecting rod 31 is hinged to one end of the fourth connecting rod 32, the first connecting rod 29 is parallel to the third connecting rod 31, the second connecting rod 30 is parallel to the fourth connecting rod 32, the other end of the fourth connecting rod 32 and the other end of the first connecting rod 29 are respectively hinged to one end of a first connecting column 35, a motor 33 is arranged on the right side of the sliding rail 26, the motor 33 is connected with the inner wall of the box body 24, an output shaft of the motor 33 is connected with one end of a crank 34, the hinged part of the second connecting rod 30 and the third connecting rod 31 is hinged to the other end of the crank 34, the other end of the first connecting column 35 is vertically connected with one end of a second connecting column 36, the other end of the second connecting column 36 is connected with a dust brush 37, the dust brush 37 faces the acoustic surface filter chip 1, collision blocks 38 are respectively arranged at the two ends of the sliding rail 26, elastic bumps 39 are arranged on one sides of the first sliding block 27 and the second sliding block 28 facing the collision blocks 38, the elastic lug 39 can be in contact with the impact mass 38. A dust storage box 40 is arranged on the bottom wall of the box body 24, and the dust storage box 40 is positioned below the sweeping brush 37.
The working principle and the beneficial technical effects of the technical scheme are as follows: when the surface acoustic filter chip 1 is used for a long time, dust is accumulated on the surface, the motor 33 is started to drive the crank 34 to rotate, the first connecting rod 29, the second connecting rod 30, the third connecting rod 31 and the fourth connecting rod 32 form a parallelogram connecting rod mechanism, because the first slide block 27 and the second slide block 28 hinged with the parallelogram connecting rod mechanism limit the slide blocks to reciprocate only along the slide rail 26, when the crank 34 drives the second connecting rod 30 to rotate at the hinged part of the third connecting rod 31, the opposite intersection of the fourth connecting rod 32 and the first connecting rod 29 also moves along a circular track, the dust sweeping brush 37 connected with the intersection also moves along the circular track, the dust sweeping brush 37 passes through the outlet 25, the dust on the surface of the surface acoustic filter chip 1 is cleaned along the circular track and then returns to the box body 24, the parallelogram connecting rod mechanism is also continuously unfolded or folded, and when the dust sweeping brush 37 returns to the box body 24, the first slide block 27 and the second slide block 28 will also move to the two ends of the slide rail 26, so that the elastic protrusion 39 collides with the collision block 38 to generate vibration, and the dust on the dust brush 37 is shaken down into the dust storage box 40 for centralized processing. The dust brush 37 is in the continuous along circular orbit cyclic movement to carry out the deashing to the surperficial deashing of sound surface filter chip 1, and the dust on the dust brush 37 can be in returning the box 24, trembles to store in storing up the dirt box 40 to guarantee the clean and tidy of dust brush, prevent that the dust that gathers on the dust brush, influence clean effect.
In one embodiment, the dust box 40 is provided with a door 41, and the door is opened to take out the dust box 40 so as to intensively clean the dust.
In one embodiment, one side of the box door 41 is hinged to the dust box 40, and a sealing ring is disposed on the box door 41 and can improve the sealing performance of the box door.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A wideband impedance element type surface acoustic wave filter comprising: the surface acoustic wave filter comprises a surface acoustic wave filter chip (1), a shell (2) and binding posts (3), wherein the surface acoustic wave filter chip (1) is arranged in the shell (2), one ends of the binding posts (3) are connected with the surface acoustic wave filter chip (1), the other ends of the binding posts (3) extend out of the shell (2), the binding posts (3) are connected with the shell (2), and a plurality of heat dissipation holes (4) are formed in the outer wall of the shell (2);
be provided with heat abstractor in shell (2), heat abstractor includes: the fan comprises a fixed shaft (6), a rotating block (7), a fixed gear (8), a double-output-shaft motor (9), a gear (10), a sliding chute (11), a sliding block (12), a screw (13), a first fan (14), a rotating shaft (15), a second fan (16), an L-shaped connecting rod (17) and a wind plate (18), wherein the shell (2) is cylindrical, the fixed shaft (6) is arranged in the shell (2), one end of the fixed shaft (6) is connected with the circle center of the inner wall of the shell (2), the other end of the fixed shaft (6) is rotatably connected with the rotating block (7), the fixed gear (8) is arranged on the fixed shaft (6), the double-output-shaft motor (9) is arranged on the side wall of the rotating block (7), a first output shaft of the double-output-shaft motor (9) is connected with the gear (10), and the gear (10) is meshed with the fixed gear (8), a sliding groove (11) extending along the horizontal direction is arranged on the rotating block (7), a sliding block (12) is connected in the sliding groove (11) in a sliding way, a second output shaft of the double-output-shaft motor (9) is connected with one end of a screw rod (13), the other end of the screw rod (13) penetrates through the sliding groove (11) to be connected with a first fan (14), the screw rod (13) penetrates through the sliding block (12), and is connected with the sliding block (12) by screw thread, a rotating shaft (15) is arranged at the axle center of one side of the rotating block (7) far away from the fixed gear (8), one end of the rotating shaft (15) is connected with the rotating block (7), the other end of the rotating shaft (15) is connected with the second fan (16), one end of the L-shaped connecting rod (17) is connected with the sliding block (12), the other end of the L-shaped connecting rod (17) is connected with an air plate (18), and the air plate (18) faces the surface acoustic wave filter chip (1).
2. A broadband impedance element type surface acoustic wave filter as set forth in claim 1, wherein said heat dissipation hole (4) is provided with a dust filter (5).
3. A broadband impedance element type surface acoustic wave filter as set forth in claim 1, wherein an opening (19) is provided on an outer wall of said housing (2).
4. A broadband impedance element type surface acoustic wave filter as set forth in claim 3, wherein a cover plate (20) is provided on said opening (19), said cover plate (20) being screwed to an outer wall of said housing (2).
5. A wideband impedance element type surface acoustic wave filter according to claim 1, characterized in that a temperature sensor (21) and a processor (22) are arranged on the inner wall of said housing (2), said temperature sensor (21) is electrically connected to said processor (22), and said processor (22) is in wireless communication with said dual output shaft motor (9).
6. The wideband impedance element type surface acoustic wave filter according to claim 1, further comprising a dust removing device, said dust removing device comprising: the structure of the surface acoustic wave filter comprises a box body (24), an outlet (25), a sliding rail (26), a first sliding block (27), a second sliding block (28), a first connecting rod (29), a second connecting rod (30), a third connecting rod (31), a fourth connecting rod (32), a motor (33), a crank (34), a first connecting column (35), a second connecting column (36), a dust sweeping brush (37), a collision block (38) and an elastic bump (39), wherein the inner wall of a shell (2) is close to the connecting column (3) and is provided with the box body (24), the outer wall of the box body (24) is close to the outlet (25) at the position of a surface acoustic wave filter chip (1), the inner wall of the box body (24) is provided with the sliding rail (26), the sliding rail (26) is perpendicular to the connecting column (3), the sliding rail (26) is provided with the first sliding block (27) and the second sliding block (28) at intervals, and the first sliding block (27) and the second sliding block (28) are arranged on the sliding rail (26), The second sliding blocks (28) can slide on the sliding rails (26) in a reciprocating manner, the center of the first sliding block (27) is hinged to one end of a first connecting rod (29) and one end of a second connecting rod (30), the other end of the second connecting rod (30) is hinged to one end of a third connecting rod (31), the other end of the third connecting rod (31) is hinged to one end of a fourth connecting rod (32), the first connecting rod (29) is parallel to the third connecting rod (31), the second connecting rod (30) is parallel to the fourth connecting rod (32), the other end of the fourth connecting rod (32) and the other end of the first connecting rod (29) are hinged to one end of a first connecting column (35), a motor (33) is arranged on the right side of the sliding rails (26), the motor (33) is connected with the inner wall of the box body (24), an output shaft of the motor (33) is connected with one end of a crank (34), and the hinged position of the second connecting rod (30) and the third connecting rod (31) is hinged to the other end of the crank (34) The other end of the first connecting column (35) is perpendicularly connected with one end of the second connecting column (36), the other end of the second connecting column (36) is connected with a dust sweeping brush (37), the dust sweeping brush (37) faces the surface acoustic wave filter chip (1), collision blocks (38) are respectively arranged at two ends of the sliding rail (26), an elastic bump (39) is arranged on one side, facing the collision blocks (38), of the first sliding block (27) and the second sliding block (28), and the elastic bump (39) can be in contact with the collision blocks (38).
7. A broadband impedance element type surface acoustic wave filter as set forth in claim 6, wherein a dust storage box (40) is provided on the bottom wall of said case (24), said dust storage box (40) being located below said dust brush (37).
8. A wideband impedance element type surface acoustic wave filter as claimed in claim 7, characterized in that said dust box (40) is provided with a door (41).
9. A broadband impedance element type surface acoustic wave filter according to claim 8, characterized in that one side of said cabinet door (41) is hinged to said dust box (40), and a sealing ring is provided on said cabinet door (41).
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| WO2021244220A1 (en) * | 2020-06-04 | 2021-12-09 | 中兴通讯股份有限公司 | Heat dissipation assembly, heat dissipation structure and heat dissipation method therefor, and electronic device and apparatus |
| CN213662266U (en) * | 2020-11-25 | 2021-07-09 | 苏州迈奥电子科技有限公司 | Good heat dissipation's signal filter |
| CN114157266A (en) * | 2022-02-07 | 2022-03-08 | 深圳新声半导体有限公司 | High-shielding surface acoustic wave filter |
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| CN114421924A (en) | 2022-04-29 |
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