Balanced surface acoustic wave filter

Abstract

The present application relates to the technical field of filters, and discloses a balanced surface acoustic wave filter, comprising a base, a substrate, and a shell. The substrate is fixedly mounted on the base, the shell is covered outside the substrate and is fixedly connected to the edge of the base through a fixing device, and a heat dissipation device is installed on the shell. The heat dissipation device comprises a cooling block and a sealing cover. A first water trough, a second water trough, and a connecting groove are provided on the cooling block, and a water inlet and a water outlet are provided on the sealing cover. The water inlet is connected to the second water trough, and the water outlet is connected to the first water trough. The water inlet is connected to a water source, and the water outlet is connected to a water storage tank. Heat is taken away by water flowing in a metal chamber formed by the first water trough, the second water trough, and the connecting groove. The present application has the effect of increasing the path of the water flow, which is convenient for taking away the heat emitted by the substrate, and can also be beneficial to increasing the area of ​​contact of the water flow.

Description

Technical Field

[0001] The present application relates to the technical field of filters, and in particular to a balanced surface acoustic wave filter. Background Art

[0002] As a frequency selective device, surface acoustic wave filters are widely used in mobile communication terminals. Surface acoustic wave filters include resonators, which are interdigitated electrode structures made on piezoelectric substrates. Resonators are connected in series or in parallel to form surface acoustic wave filters to complete the filter function.

[0003] There are at least the following technical problems with the above-mentioned related technologies: the existing surface acoustic wave filters generate a large amount of heat energy during use, and their heat dissipation efficiency is low, which easily affects the performance of the filter. Summary of the invention

[0004] The embodiments of the present application solve the problem of low heat dissipation efficiency of the surface acoustic wave filter itself in the prior art by providing a balanced surface acoustic wave filter, thereby improving the heat dissipation capacity of the surface acoustic wave filter itself and improving the overall performance.

[0005] On the one hand, an embodiment of the present application provides a balanced surface acoustic wave filter, comprising a base, a substrate arranged on the base, and a shell covering the outside of the substrate, wherein a heat dissipation device is arranged on the shell; the heat dissipation device comprises a cooling block arranged on the upper end surface of the shell, and a sealing cover arranged on the cooling block; a first U-shaped water tank is arranged on the cooling block; a second water tank is arranged on the cooling block and located inside the first water tank; connecting grooves are arranged on both sides of the second water tank; the other end of the connecting groove is connected to the corresponding first water tank; a water inlet and a water outlet are respectively arranged on the sealing cover and near the two ends; the water inlet is connected to the second water tank; the water outlet is connected to the first water tank.

[0006] Furthermore, a plurality of connecting grooves are arranged at intervals along the length direction of the second water tank.

[0007] Furthermore, the shell and the base are connected by a connecting mechanism; the connecting mechanism includes U-shaped blocks respectively arranged on both sides of the sealing cover, a movable shaft rotatably installed on the shell, a locking threaded column arranged on the movable shaft, and a locking nut threadedly connected to the locking threaded column; the movable shaft is arranged along the length direction of the cooling block, and one movable shaft is arranged on both sides of the cooling block; the locking threaded column is plugged into and matched with the U-shaped block.

[0008] Furthermore, an annular sealing groove is provided on the upper end surface of the cooling block; and a sealing ring which is plugged and matched with the sealing groove is provided on the sealing cover.

[0009] Further, the base is provided with a placement frame; the substrate is arranged in the placement frame; the lower end surface of the shell is provided with a pressure ring; the pressure ring abuts against the upper end surface of the substrate near the edge; the shell abuts against the upper end surface of the placement frame.

[0010] Furthermore, a first edge is arranged on the circumference of the base; a second edge is arranged on the circumference of the shell; and the first edge and the second edge are connected by a fixing device.

[0011] Furthermore, the fixing device includes a positioning threaded column arranged on the first edge and a positioning nut threadedly connected to the positioning threaded column; the lower end surface of the positioning nut is tightly pressed against the upper end surface of the second edge.

[0012] Furthermore, a driving mechanism is provided on the second edge; the driving mechanism includes a positioning gear ring provided on the positioning nut, a gear ring rotatably provided on the second edge, and a gear column rotatably provided on the second edge; the plurality of positioning gear rings are all meshed with the outer sides of the gear rings; the gear column is meshed with the gear rings; the width of the gear ring is greater than the width of the positioning gear ring.

[0013] Furthermore, a plurality of positioning threaded columns are arranged at circumferential intervals along the first edge.

[0014] Furthermore, a positioning mechanism is provided on the outer shell; the positioning mechanism includes a positioning ring provided on the outer shell and an elastic sheet provided on the positioning ring; both ends of the elastic sheet are fixed to the positioning ring, and the middle part of the elastic sheet is spaced apart from the positioning ring; a first positioning hole is provided on the positioning ring; a second positioning hole corresponding to the first positioning hole is provided on the gear ring; a positioning block is inserted into the second positioning hole, and the upper end of the positioning block passes through the first positioning hole and is tightly pressed against the middle part of the elastic sheet.

[0015] On the other hand, an embodiment of the present application provides a balanced surface acoustic wave filter, a balanced surface acoustic wave filter, comprising a base, a substrate arranged on the base, and a shell covering the outside of the substrate, characterized in that a heat dissipation device is arranged on the shell; the heat dissipation device comprises a cooling block arranged on the upper end surface of the shell, and a sealing cover arranged on the cooling block; the cooling block is provided with two spaced first water grooves, a plurality of second water grooves and a plurality of connecting grooves; the plurality of second water grooves are spaced apart along the width direction of the cooling block, and the side walls of each of the first water grooves are radially arranged with a plurality of the connecting grooves; the two ends of each of the second water grooves are respectively connected with two corresponding connecting grooves; a water inlet and a water outlet are respectively provided on the sealing cover and near the two ends; the water inlet is connected with one of the first water grooves; the water outlet is connected with another of the first water grooves.

[0016] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0017] 1. Due to the use of a heat dissipation device, the surface acoustic wave filter can be water-cooled in time when it is used. By setting a first water trough, a second water trough and a connecting trough, the path of the water flow is increased, which facilitates the removal of heat emitted by the substrate. The setting of multiple troughs can also help increase the contact area of ​​the water flow, and can further improve the heat dissipation performance when the water flows, effectively solving the problem of low heat dissipation efficiency of the surface acoustic wave filter itself in the prior art, and improving the heat dissipation capacity of the surface acoustic wave filter itself and improving the overall performance.

[0018] 2. Since the cooling block and the sealing cover are separated, the cooling box can be easily disassembled to observe the internal structure. When the overall cooling effect decreases, it can be disassembled and the inside can be cleaned, which effectively solves the problem that the box with an integrated structure in the prior art is not easy to clean inside, thereby achieving the effect of improving the utilization rate of the heat dissipation device.

[0019] 3. Due to the structure in which the mounting frame and the pressure ring are matched, the substrate can be pressed by the pressure ring when the outer shell is placed on the base, making the installation of the substrate more stable and reliable. The pressure ring is in direct contact with the substrate, and the heat generated by the substrate can be quickly led to the outer shell, thereby accelerating the heat dissipation of the substrate and improving the performance of the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0021] Figure 2 This is an exploded schematic diagram of the filter body in the first embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the structure after the positioning ring in Example 1 of the present application is disassembled;

[0023] Figure 4 This is a schematic diagram of the installation position of the pressure ring in Example 1 of the present application;

[0024] Figure 5 This is a schematic diagram of the structure of the cooling block in the second embodiment of the present application;

[0025] In the figure: 1, base; 11, first edge; 12, placement frame; 2, substrate; 3, housing; 31, second edge; 311, mounting hole; 312, fixing groove; 32, pressure ring; 33, feed hole; 34, discharge hole; 4, fixing device; 41, positioning threaded column; 42, positioning nut; 5, driving mechanism; 51, positioning gear ring; 52, gear ring; 521, second positioning hole; 53, gear column; 54, torsion block; 6, positioning mechanism; 61, positioning ring; 611, first positioning hole; 62, spring Sex piece; 621, connecting part; 622, pressing part; 63, positioning block; 7, heat dissipation device; 71, cooling block; 711, sealing groove; 712, first water tank; 713, second water tank; 714, connecting groove; 72, sealing cover; 721, sealing ring; 722, third water tank; 723, fourth water tank; 73, water inlet; 74, water outlet; 75, guide column; 76, guide hole; 8, connecting mechanism; 81, U-shaped block; 82, movable shaft; 83, locking threaded column; 84, locking nut. DETAILED DESCRIPTION

[0026] The embodiment of the present application discloses a balanced surface acoustic wave filter, which dissipates heat quickly from the filter by arranging a heat dissipation device 7 on the housing 3 and utilizing the water cooling principle. A first water trough 712, a second water trough 713 and a connecting trough 714 are arranged to increase the path of the water flow, thereby taking away the heat emitted by the substrate 2. The arrangement of multiple troughs can also help to increase the contact area of ​​the water flow, and can further improve the heat dissipation performance when the water flows, thereby effectively solving the problem of low heat dissipation efficiency of the surface acoustic wave filter itself in the prior art, thereby improving the heat dissipation capacity of the surface acoustic wave filter itself and improving the overall performance.

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Embodiment 1

[0029] Reference Figure 1 , Figure 2 A balanced surface acoustic wave filter includes a base 1, a substrate 2, and a housing 3. The substrate 2 is fixedly mounted on the base 1. The housing 3 is covered outside the substrate 2 and is fixedly connected to the edge of the base 1 through a fixing device 4. A heat sink 7 is installed on the housing 3. The heat sink 7 can dissipate heat from the filter in time to improve the performance of the filter. The base 1 is disc-shaped, and an annular first edge 11 is formed in the circumference of the base 1. The housing 3 is a cover-shaped body, and an annular second edge 31 is formed on the outer edge of the housing 3. The first edge 11 is aligned and fits with the second edge 31 to form a sealed state.

[0030] Reference Figure 2The fixing device 4 includes a positioning threaded column 41 and a positioning nut 42. The positioning threaded column 41 is fixedly installed on the first edge 11, and a plurality of positioning threaded columns 41 are arranged at intervals along the circumference of the first edge 11. A plurality of mounting holes 311 are opened on the second edge 31. The mounting holes 311 are arranged one-to-one correspondingly to the positioning threaded columns 41, and the aperture of the mounting hole 311 is larger than the outer diameter of the positioning threaded column 41, so as to facilitate the installation of the housing 3. The positioning nut 42 is threadedly connected to the positioning threaded column 41, and the outer diameter of the positioning nut 42 is larger than the aperture of the mounting hole 311. Tightening the positioning nut 42 on the second edge 31 can make the first edge 11 and the second edge 31 fit tightly. In order to improve the connection strength between the positioning nut 42 and the second edge 31, an annular fixing groove 312 is opened on the upper end surface of the second edge 31. The fixing groove 312 is located on the outside of the mounting hole 311 and is not connected to the mounting hole 311. When the positioning nut 42 is tightened, the lower end surface of the positioning nut 42 can be abutted against the bottom of the fixing groove 312.

[0031] Reference Figure 1 , Figure 2 In order to facilitate locking the positioning nut 42, a driving mechanism 5 is installed on the second edge 31, and the driving mechanism 5 includes a positioning gear ring 51, a gear ring 52, and a gear column 53. The positioning gear ring 51 is fixedly installed on the positioning nut 42 and is located in the middle position of the positioning nut 42. The gear ring 52 is rotatably connected to the shell 3, and the center of the gear ring 52 coincides with the center of the shell 3. Multiple positioning gear rings 51 are meshed with the outer side of the gear ring 52. The gear column 53 is rotatably installed on the second edge 31. A torsion block 54 is fixed on the upper end of the gear column 53 to facilitate rotating the gear column 53. The gear column 53 is meshed with the gear ring 52. In order to ensure that the positioning gear ring 51 is always meshed with the gear ring 52, the width of the gear ring 52 is greater than the width of the positioning gear ring 51.

[0032] Reference Figure 2 , Figure 3A positioning mechanism 6 is installed on the housing 3. The gear ring 52 is positioned by the positioning mechanism 6 so that the gear ring 52 is locked and the positioning nut 42 is not easy to rotate relative to the positioning threaded column 41. The positioning mechanism 6 includes a positioning ring 61, an elastic sheet 62 and a positioning block 63. The positioning ring 61 is fixedly installed on the circumference of the housing 3. The positioning ring 61 is located above the gear ring 52 and is spaced apart from the gear ring 52. The center of the positioning ring 61 coincides with the center of the gear ring 52. The outer diameter of the positioning ring 61 is smaller than the outer diameter of the gear ring 52, which can ensure that the gear ring 52 is meshed with the positioning gear ring 51 and is easy to observe. The elastic sheet 62 is provided with a plurality of intervals along the circumference of the positioning ring 61, and the elastic sheet 62 includes two connecting parts 621 and a tightening part 622. The two connecting parts 621 are symmetrically arranged about the tightening part 622. The cross section of the connecting part 621 is Z-shaped, and the cross section of the tightening part 622 is U-shaped. The horizontal part below the connecting part 621 is fixedly connected to the positioning ring 61, and the end of the horizontal part above the connecting part 621 extends away from the horizontal part below the connecting part 621, and the horizontal parts above the two connecting parts 621 are respectively fixedly connected to the two ends of the tightening part 622, and the lower end surface of the tightening part 622 is spaced apart from the upper end surface of the positioning ring 61. A plurality of first positioning holes 611 are provided on the positioning ring 61, and the first positioning holes 611 are provided corresponding to the lower end of the tightening part 622. A plurality of second positioning holes 521 are provided on the upper end surface of the gear ring 52. 11 is connected to the second positioning hole 521, and the number of the second positioning holes 521 is greater than the number of the first positioning holes 611. The lower end of the positioning block 63 is inserted into the second positioning hole 521, and the upper end of the positioning block 63 passes through the first positioning hole 611 and is pressed against the tightening portion 622 of the elastic sheet 62, so that the positioning block 63 is tightly inserted into the second positioning hole 521, so that the gear ring 52 is not easy to rotate. In order to facilitate the removal of the positioning block 63, an inclined surface is formed on the lower end surface of the positioning block 63, and the inclined direction of the inclined surface is toward the gear ring 52. When the gear ring 52 needs to be rotated and the positioning nut 42 is locked, it is only necessary to push the positioning block 63 to one side. Under the action of the inclined surface, the elastic sheet 62 is slightly deformed, so that the positioning block 63 is disconnected from the first positioning hole 611 and the second positioning hole 521, thereby enabling the gear ring 52 to rotate. The number of the second positioning holes 521 is greater than the number of the first positioning holes 611 . When the gear ring 52 rotates to different positions, the second positioning holes 521 on the gear ring 52 can correspond to the first positioning holes 611 , thereby improving the positioning accuracy of the gear ring 52 .

[0033] Reference Figure 2 , Figure 4A placement frame 12 is fixedly installed at the center of the base 1, and notches are provided at both ends of the placement frame to facilitate the connection between the substrate 2 and the pins. The substrate 2 is installed in the placement frame 12, and a pressure ring 32 is fixedly installed on the lower end face of the shell 3. The pressure ring 32 abuts against the upper end face of the substrate 2 and the position near the edge, and the outer wall of the pressure ring 32 abuts against the side wall of the placement frame 12. The lower end face of the shell 3 abuts against the upper end face of the placement frame 12, which can make the installation of the substrate 2 more stable and reliable. Furthermore, the pressure ring 32 is a thermally conductive silicone gasket, and the upper part of the pressure ring 32 corresponds to the heat dissipation device 7, which can quickly take away the heat emitted by the substrate 2.

[0034] Reference Figure 2The heat dissipation device 7 includes a cooling block 71 and a sealing cover 72. The cooling block 71 is fixedly mounted on the upper end surface of the housing 3 and is in the shape of a rectangular parallelepiped. The sealing cover 72 cooperates with the cooling block 71. An annular sealing groove 711 is provided on the upper end surface of the cooling block 71. The four sides of the sealing groove 711 are close to the four edges of the cooling block 71. A sealing ring 721 is fixedly mounted on the sealing cover 72. The sealing ring 721 is plugged into the sealing groove 711, so that a sealing state is formed between the sealing cover 72 and the cooling block 71, and cooling water is not easy to flow out. A first water trough 712, a second water trough 713 and a connecting groove 714 are formed on the upper end surface of the cooling block 71. The first water trough 712 is U-shaped. For the convenience of description and understanding, the two mutually parallel trough bodies of the first water trough 712 are defined as the vertical parts of the first water trough 712, and the trough body connecting the two vertical parts of the first water trough 712 on the first water trough 712 is defined as the horizontal part of the first water trough 712. The second water trough 713 and the connecting groove 714 are both long strips. The length direction of the two vertical parts of the first water trough 712 is consistent with the length direction of the cooling block 71, the length direction of a horizontal part of the first water trough 712 is consistent with the width direction of the cooling block 71, the length direction of the second water trough 713 is consistent with the length direction of the cooling block 71, and the first water trough 712 is consistent with the width direction of the cooling block 71. The horizontal portion of the first water trough 712 is close to one end of the cooling block 71, the ends of the two vertical portions of the first water trough 712 are close to the other end of the cooling block 71, the second water trough 713 is located in the middle of the two vertical portions of the first water trough 712, and one end of the second water trough 713 is close to the horizontal portion of the first water trough 712, and the other end of the second water trough 713 is close to the other end of the cooling block 71, a plurality of connecting grooves 714 are arranged at intervals along the length direction of the second water trough 713, and the two ends of the connecting grooves 714 are respectively connected to the vertical portions of the corresponding first water troughs 712, that is, the plurality of connecting grooves 714 are arranged in parallel and vertically connected to the first water trough 712, and the three water troughs are arranged horizontally and vertically in a cross manner to increase the water flow area and improve the heat dissipation effect. In order to increase the water intake in the cooling block 71 and improve the heat dissipation performance, a third water tank 722 and a fourth water tank 723 are provided on the lower end surface of the sealing cover 72. The third water tank 722 and the fourth water tank 723 correspond to and are connected with the first water tank 712 and the second water tank 713, respectively, which can not only increase the water flow, but also increase the contact area of ​​the water flow, thereby improving the heat dissipation effect. The cooling block 71 and the sealing cover 72 are made of heat-conducting material.

[0035] Reference Figure 1 , Figure 2The water inlet 73 and the water outlet 74 are respectively installed on the sealing cover 72 and near the two ends. The water inlet 73 is connected to the end of the second water tank 713 away from the horizontal part of the first water tank 712, and the water outlet 74 is connected to the middle part of the horizontal part of the first water tank 712. The water inlet 73 and the water outlet 74 are both threaded pipes. The water inlet 73 is connected to the water source, and the water outlet 74 is connected to the water tank. A water pump is installed on the connecting pipe, which can facilitate the heat dissipation effect of the filter. The water pipes are connected at the water inlet 73 and the water outlet 74 through connectors. In order to further improve the overall heat dissipation performance of the filter, a heat dissipation device 7 is also installed below the base 1.

[0036] Reference Figure 2 , Figure 3In order to facilitate the disassembly of the sealing cover 72 and the cooling block 71, the first edge 11 and the second edge 31 are fixedly connected through a connecting mechanism 8, and the connecting mechanism 8 includes a U-shaped block 81, a movable shaft 82, a locking threaded column 83, and a locking nut 84. The U-shaped blocks 81 are fixedly installed on both sides of the sealing cover 72. The openings of the U-shaped blocks 81 on both sides of the sealing cover 72 are separated from each other, and the U-shaped blocks 81 are fixedly installed on each side of the sealing cover 72 and near the two ends. A mounting seat is fixedly installed on the housing 3 and near the cooling block 71. The mounting seat The upper part is rotatably connected with a movable shaft 82, the length direction of the movable shaft 82 is parallel to the length direction of the cooling block 71, and movable shafts 82 are arranged on both sides of the cooling block 71. A locking threaded column 83 is fixedly installed on the movable shaft 82, and two locking threaded columns 83 are arranged at intervals along the length direction of the movable shaft 82, and the locking threaded columns 83 and the movable shaft 82 are perpendicular to each other. Each locking threaded column 83 corresponds to a U-shaped block 81, and the locking threaded column 83 is plugged and matched with the U-shaped block 81, and the locking threaded column 83 is threadedly connected with the locking nut 84. When the sealing cover 72 and the cooling block 71 need to be fixedly connected and sealed, the movable shaft 82 is rotated so that the movable shaft 82 drives the locking threaded column 83 to flip, so that the locking threaded column 83 is plugged into the corresponding U-shaped block 81, and then the locking nut 84 is tightened so that the lower end surface of the locking nut 84 is tightly pressed against the upper end surface of the U-shaped block 81. In order to facilitate the alignment of the sealing cover 72 with the cooling block 71, guide posts 75 are fixedly installed near the four corners of the cooling block 71, and guide holes 76 are opened at the corresponding positions of the sealing cover 72. The guide holes 76 cooperate with the guide posts 75, and the height of the guide posts 75 is higher than the height of the sealing cover 72. The guide posts 75 are located on the outside of the sealing groove 711, and the top of the guide posts 75 is formed with chamfers, which is convenient for the sealing cover 72 to be covered on the cooling block 71. The guide posts 75 are made of rubber material, which can help improve the connection effect between the sealing cover 72 and the cooling block 71 and strengthen the sealing between the sealing cover 72 and the cooling block 71. The shell 3 is provided with a feed hole 33 and a discharge hole 34, which are respectively close to the positions on both sides of the shell 3. After the overall installation and fixation, a closed chamber is formed between the shell 3 and the outside of the base 1 and the placement frame 12. By injecting silicone grease from the feed hole 33, the silicone grease fills the closed chamber and overflows from the discharge hole 34. The silicone grease is a thermally conductive silicone grease, which is filled in the closed chamber between the shell 3 and the base 1 , and can quickly conduct heat and dissipate heat, and can further improve the tightness of the connection between the shell 3 and the base 1 .

[0037] Embodiment 2

[0038] Reference Figure 2 , Figure 5The difference from the first embodiment is that a first water groove 712, a second water groove 713 and a connecting groove 714 are formed on the upper end surface of the cooling block 71, and a first water groove 712 is formed at both ends of the cooling block 71. The side walls facing each other of the two first water grooves 712 are arc-shaped surfaces, and the openings of the two arc-shaped surfaces are arranged in opposite directions. There are multiple second water grooves 713 arranged at intervals along the width direction of the cooling block 71, and the length direction of the second water grooves 713 is consistent with the length direction of the cooling block 71. There are multiple connecting grooves 714 arranged at intervals along the arc surface of the first water groove 712, and the other ends of the multiple connecting grooves 714 are connected to a second water groove 713. The multiple connecting grooves 714 are radially arranged along the arc surface of the first water groove 712, and an arc-shaped transition portion is formed at the position where the connecting grooves 714 are connected to the second water grooves 713, that is, the two ends of the second water groove 713 are respectively connected to two corresponding connecting grooves 714. The arrangement of multiple first water grooves 712, second water grooves 713 and connecting grooves 714 can not only increase the water flow rate, but also increase the contact area of ​​the water flow, thereby improving the heat dissipation effect.

[0039] Reference Figure 1 , Figure 5 A water inlet 73 and a water outlet 74 are respectively installed on the sealing cover 72 near both ends. The water inlet 73 is connected to one first water tank 712, and the water outlet 74 is connected to another first water tank 712. The water inlet 73 and the water outlet 74 are both threaded pipes. The water inlet 73 is connected to the water source, and the water outlet 74 is connected to the water tank. A water pump is installed on the connecting pipe, which can facilitate the heat dissipation effect of the filter. The water inlet 73 and the water outlet 74 are connected to the water pipe through a connector. When water flows into a first water tank 712 through the water inlet 73, the water flows through the first water tank 712 and is distributed to flow into multiple connecting tanks 714 connected to it. A branch of the water flow is introduced into the second water tank 713 through each connecting tank 714, and is guided along the second water tank 713 to the connecting tank 714 connected to the other end thereof. The water flow is then gathered into the first water tank 712 through multiple connecting tanks 714 connected to another first water tank 712, and the water is discharged through the water outlet 74. Multiple straight water tanks can reduce the resistance of the water flow and increase the water flow speed, so that the water flow can quickly take away the heat on the cooling block 71.

[0040] The working principle of the embodiment of the present application is: when in use, the water inlet 73 is connected to the water source through a connector, the water outlet 74 is connected to the water tank through a connector, and the liquid is pumped into the water inlet 73 through a water pump on the water pipe, and flows into one end of the second water tank 713 through the water inlet 73. The water flow gradually diffuses along the second water tank 713 and is introduced into the first water tank 712 through the connecting groove 714. The heat of the substrate 2 is quickly cooled by the heat conduction effect of the cooling block 71, and multiple connecting grooves 714 form a fin shape on the cooling block 71. The water flows in the metal chamber formed by the first water tank 712, the second water tank 713 and the connecting groove 714 to take away the heat, thereby improving the overall heat dissipation effect.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these 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 these modifications and variations.

[0042] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A balanced surface acoustic wave filter, comprising a base (1), a substrate (2) arranged on the base (1), and a housing (3) arranged outside the substrate (2), characterized in that: A heat dissipation device (7) is provided on the outer shell (3); the heat dissipation device (7) comprises a cooling block (71) provided on the upper end surface of the outer shell (3) and a sealing cover (72) provided on the cooling block (71); The cooling block (71) is provided with a U-shaped first water tank (712); a second water tank (713) is provided on the cooling block (71) and is located inside the first water tank (712); connecting tanks (714) are provided on both sides of the second water tank (713); the other end of the connecting tank (714) is connected to the corresponding first water tank (712); A water inlet (73) and a water outlet (74) are respectively provided on the sealing cover (72) and near both ends; the water inlet (73) is connected to the second water tank (713); the water outlet (74) is connected to the first water tank (712); The base (1) is provided with a placement frame (12); the substrate (2) is arranged in the placement frame (12); a pressure ring (32) is provided on the lower end surface of the shell (3); the pressure ring (32) abuts against the upper end surface of the substrate (2) near the edge; the shell (3) abuts against the upper end surface of the placement frame (12); The base (1) is provided with a first edge (11) in the circumference thereof; the shell (3) is provided with a second edge (31) in the circumference thereof; the first edge (11) and the second edge (31) are connected via a fixing device (4); The fixing device (4) comprises a positioning threaded column (41) arranged on the first edge (11), and a positioning nut (42) threadedly connected to the positioning threaded column (41), wherein the lower end surface of the positioning nut (42) is tightly pressed against the upper end surface of the second edge (31); A driving mechanism (5) is arranged on the second edge (31); the driving mechanism (5) comprises a positioning gear ring (51) arranged on the positioning nut (42), a gear ring (52) rotatably arranged on the second edge (31), and a gear column (53) rotatably arranged on the second edge (31); the plurality of positioning gear rings (51) are all meshed with the outer sides of the gear rings (52); the gear column (53) is meshed with the gear ring (52); and the width of the gear ring (52) is greater than the width of the positioning gear ring (51).

2. The balanced surface acoustic wave filter according to claim 1, wherein: The housing (3) and the base (1) are connected via a connecting mechanism (8); the connecting mechanism (8) comprises U-shaped blocks (81) respectively arranged on both sides of the sealing cover (72), a movable shaft (82) rotatably mounted on the housing (3), a locking threaded column (83) arranged on the movable shaft (82), and a locking nut (84) threadedly connected to the locking threaded column (83); The movable shaft (82) is arranged along the length direction of the cooling block (71), and one movable shaft (82) is arranged on both sides of the cooling block (71); the locking threaded column (83) is plug-fitted with the U-shaped block (81).

3. The balanced surface acoustic wave filter according to claim 1, wherein: An annular sealing groove (711) is provided on the upper end surface of the cooling block (71); and a sealing ring (721) pluggably engaged with the sealing groove (711) is provided on the sealing cover (72).

4. The balanced surface acoustic wave filter according to claim 1, wherein: A plurality of positioning threaded columns (41) are arranged at circumferential intervals along the first edge (11).

5. The balanced surface acoustic wave filter according to claim 1, wherein: A positioning mechanism (6) is provided on the housing (3); the positioning mechanism (6) comprises a positioning ring (61) provided on the housing (3) and an elastic sheet (62) provided on the positioning ring (61); Both ends of the elastic sheet (62) are fixed to the positioning ring (61), and the middle of the elastic sheet (62) is spaced apart from the positioning ring (61); a first positioning hole (611) is formed on the positioning ring (61); and a second positioning hole (521) corresponding to the first positioning hole (611) is formed on the gear ring (52); A positioning block (63) is inserted into the second positioning hole (521), and the upper end of the positioning block (63) passes through the first positioning hole (611) and is tightly pressed against the middle part of the elastic sheet (62).

6. A balanced surface acoustic wave filter, comprising a base (1), a substrate (2) arranged on the base (1), and a housing (3) arranged outside the substrate (2), characterized in that: A heat dissipation device (7) is provided on the outer shell (3); the heat dissipation device (7) comprises a cooling block (71) provided on the upper end surface of the outer shell (3) and a sealing cover (72) provided on the cooling block (71); The cooling block (71) is provided with two spaced first water grooves (712), a plurality of second water grooves (713) and a plurality of connecting grooves (714); the plurality of second water grooves (713) are spaced apart along the width direction of the cooling block (71), and the side wall of each first water groove (712) is provided with a plurality of connecting grooves (714) arranged radially; the two ends of each second water groove (713) are respectively connected to two corresponding connecting grooves (714); A water inlet (73) and a water outlet (74) are respectively provided on the sealing cover (72) and near the two ends; the water inlet (73) is connected to one of the first water tanks (712); the water outlet (74) is connected to another of the first water tanks (712); The base (1) is provided with a placement frame (12); the substrate (2) is arranged in the placement frame (12); a pressure ring (32) is provided on the lower end surface of the shell (3); the pressure ring (32) abuts against the upper end surface of the substrate (2) near the edge; the shell (3) abuts against the upper end surface of the placement frame (12); The base (1) is provided with a first edge (11) in the circumference thereof; the shell (3) is provided with a second edge (31) in the circumference thereof; the first edge (11) and the second edge (31) are connected via a fixing device (4); The fixing device (4) comprises a positioning threaded column (41) arranged on the first edge (11), and a positioning nut (42) threadedly connected to the positioning threaded column (41), wherein the lower end surface of the positioning nut (42) is tightly pressed against the upper end surface of the second edge (31); A driving mechanism (5) is arranged on the second edge (31); the driving mechanism (5) comprises a positioning gear ring (51) arranged on the positioning nut (42), a gear ring (52) rotatably arranged on the second edge (31), and a gear column (53) rotatably arranged on the second edge (31); the plurality of positioning gear rings (51) are all meshed with the outer sides of the gear rings (52); the gear column (53) is meshed with the gear ring (52); and the width of the gear ring (52) is greater than the width of the positioning gear ring (51).

Images