High and low temperature test fixture for surface acoustic wave filter

Abstract

The utility model relates to the technical field of clamps, and provides a surface acoustic wave filter high and low temperature test clamp, which comprises a shell internally provided with a first cavity. The mounting table is provided with a mounting groove and arranged on the upper surface of the shell; the mounting plate is arranged in the mounting groove and is used for mounting a device; according to the pressing device, a spiral sliding groove is formed in the inner wall of a sliding cylinder, the sliding cylinder is arranged on the mounting table, and one end of the sliding cylinder penetrates through the mounting table and the shell and then is located in the first cavity; the sliding column rotates relatively and is arranged in the sliding cylinder in a sliding mode, a first protrusion is arranged on the outer side of the sliding column, and the first protrusion is arranged in the spiral sliding groove in a sliding mode; the pressing rod is arranged at one end of the sliding column and used for pressing the mounting plate into the mounting groove. According to the technical scheme, the problem that the surface acoustic wave filter cannot be directly tested in high-low temperature equipment in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixtures, and in particular to a high and low temperature testing fixture for a surface acoustic wave filter. Background Art

[0002] With the development of military and civilian electronic equipment, higher requirements are placed on the electrical performance and reliability of surface acoustic wave filters at extreme temperatures. Therefore, the demand for extreme temperature online testing is increasing, and the requirements for test stability and authenticity are also increasing.

[0003] The common testing method in the industry is to store the device at extreme temperature for a certain period of time and then take it out for testing at room temperature. This method has large errors due to temperature changes and is not suitable for products with sensitive indicators. Another method is to press the device at extreme temperature. This method is extremely inefficient and unstable, so there is an urgent need to improve the high and low temperature online test fixture for surface acoustic wave filters. Utility Model Content

[0004] The utility model provides a high and low temperature test fixture for a surface acoustic wave filter, which solves the problem in the related art that the surface acoustic wave filter cannot be directly tested in a high and low temperature device.

[0005] The technical solution of the utility model is as follows:

[0006] The high and low temperature test fixture of the surface acoustic wave filter is used to fix the device to be tested, including:

[0007] A housing having a first cavity therein;

[0008] A mounting platform, the mounting platform having a mounting groove, and the mounting platform is arranged on the upper surface of the housing;

[0009] A mounting plate, the mounting plate is arranged in the mounting groove and is used for mounting the device;

[0010] A clamping device, the clamping device comprising:

[0011] A sliding cylinder, the inner wall of which has a spiral groove, the sliding cylinder is arranged on the mounting platform, one end of which penetrates the mounting platform and the housing, and is then located in the first cavity;

[0012] A sliding column, the sliding column is relatively rotatable and slidably arranged in the sliding cylinder, the outer side of the sliding column has a first protrusion, and the first protrusion is slidably arranged in the spiral sliding groove;

[0013] A clamping rod is arranged at one end of the sliding column and is used to clamp the mounting plate in the mounting groove.

[0014] Optionally, the sliding column has a first groove therein, the first groove has a first abutment portion therein, and the pressing device further comprises:

[0015] A first rack, wherein the first rack has a second abutment portion, the first rack is rotatably disposed in the first groove, and the first abutment portion abuts against the second abutment portion;

[0016] The first gear is rotatably disposed in the first cavity and is transmission-connected to the first rack. The first rack drives the sliding column to slide in the sliding cylinder.

[0017] Optionally, there are two clamping devices, which are arranged at both ends of the mounting platform and are used to clamp the mounting plate.

[0018] Optionally, it also includes:

[0019] A handle, the handle being rotatably disposed on one side of the housing, and one end of the handle being located in the first cavity;

[0020] a second gear, the second gear being located in the first cavity and disposed at one end of the handle;

[0021] a second rack, the second rack being relatively horizontally slidably disposed in the first cavity and being transmission-connected to the second gear;

[0022] The third gear has two third gears, and the third gears are arranged at one end of the first gear and coincide with the axis of the first gear. The third gears are both transmission-connected to the same side of the second rack.

[0023] Optionally, it also includes:

[0024] An abutment block is arranged at one end of the clamping rod, and the clamping rod abuts against the mounting plate through the abutment block.

[0025] Optionally, it also includes:

[0026] A sliding rod is arranged in the first cavity, and the second rack is slidably arranged on the sliding rod.

[0027] Optionally, it also includes:

[0028] A sensing point, the sensing point being arranged in the mounting groove;

[0029] A high-frequency line connector, wherein the number of the high-frequency line connectors is several, and the high-frequency line connectors are arranged on one side of the shell and are electrically connected to the sensing point.

[0030] The working principle and beneficial effects of the utility model are:

[0031] 1. In the utility model, in order to solve the problem that the surface acoustic wave filter cannot be directly tested in the high and low temperature equipment, a high and low temperature test fixture of the surface acoustic wave filter is designed, which includes a shell, the shell is made of high temperature resistant and low temperature materials, a first cavity is provided in the shell, a mounting platform is arranged on the shell, a mounting groove is provided on the upper surface of the mounting platform, the mounting groove is used to place the mounting plate, the device to be tested is in the mounting plate, after the mounting plate is placed in the mounting groove, the mounting plate is fixed in the mounting groove by a clamping device to prevent the mounting plate from falling off during the detection process, the clamping device is composed of a sliding cylinder, a sliding column and a clamping rod, a spiral sliding groove is provided on the inner wall of the sliding cylinder, and a first protrusion is provided on the side of the sliding column. During the clamping process, the first protrusion slides in the spiral sliding groove, so that the sliding column will rotate when sliding in the sliding cylinder, the clamping rod is arranged at one end of the sliding column, and rotates with the rotation of the sliding column. The advantage of the clamping device designed in this way is that when installing and removing the mounting plate, the clamping rod will not be located directly above the mounting groove, and will not affect the installation and removal of the mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0033] Figure 1 It is a schematic diagram of the structure of the utility model;

[0034] Figure 2 This is a cross-sectional view of the sliding cylinder structure of the utility model;

[0035] Figure 3 This is a schematic diagram of the structure of the sliding column of the utility model;

[0036] Figure 4 This is a cross-sectional view of the structure of the utility model;

[0037] Figure 5 This is a schematic diagram of the internal structure of the utility model;

[0038] Figure 6 This is a schematic diagram of the structure of the mounting plate of the utility model.

[0039] In the figure: 1. device, 2. shell, 201. first cavity, 3. mounting table, 301. mounting groove, 4. mounting plate, 5. clamping device, 501. sliding cylinder, 5011. spiral slide groove, 502. sliding column, 5021. first protrusion, 503. clamping rod, 5022. first groove, 5023. first abutment part, 6. first rack, 7. second abutment part, 8. first gear, 9. handle, 10. second gear, 11. second rack, 12. third gear, 13. abutment block, 14. sliding rod, 15. sensing point, 16. high-frequency line connector. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0041] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0042] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] Reference Figure 1 to Figure 6 , which is the first embodiment of the utility model, proposes a high and low temperature test fixture for a surface acoustic wave filter, which is used to fix a device to be tested 1, including a shell 2, and a first cavity 201 is provided inside the shell 2; a mounting platform 3 has a mounting groove 301, and the mounting platform 3 is arranged on the upper surface of the shell 2; a mounting plate 4 is arranged in the mounting groove 301, and is used to install the device 1; a clamping device 5 includes: an inner wall of a sliding cylinder 501 has a spiral groove 5011, and the sliding cylinder 501 is arranged on the mounting platform 3, one end of the sliding cylinder 501 passes through the mounting platform 3 and the shell 2, and is then located in the first cavity 201; a sliding column 502 is relatively rotated and slidably arranged in the sliding cylinder 501, and a first protrusion 5021 is provided on the outer side of the sliding column 502, and the first protrusion 5021 is slidably arranged in the spiral groove 5011; a clamping rod 503 is arranged at one end of the sliding column 502, and is used to clamp the mounting plate 4 in the mounting groove 301.

[0045] In this embodiment, in order to solve the problem that the surface acoustic wave filter cannot be directly tested in a high and low temperature device, a high and low temperature test fixture for the surface acoustic wave filter is designed, which includes a shell 2, the shell 2 is made of high temperature and low temperature resistant materials, the shell 2 has a first cavity 201, a mounting table 3 is arranged on the shell 2, and a mounting groove 301 is arranged on the upper surface of the mounting table 3, the mounting groove 301 is used to place a mounting plate 4, the device 1 to be tested is in the mounting plate 4, after the mounting plate 4 is placed in the mounting groove 301, the mounting plate 4 is fixed in the mounting groove 301 by a clamping device 5 to prevent the mounting plate 4 from falling off during the test process, and the clamping device 5 is composed of The sliding cylinder 501, the sliding column 502 and the clamping rod 503 are composed of a sliding cylinder 501, a spiral groove 5011 is provided on the inner wall of the sliding cylinder 501, and a first protrusion 5021 is provided on the side of the sliding column 502. During the clamping process, the first protrusion 5021 slides in the spiral groove 5011, so that the sliding column 502 rotates when sliding in the sliding cylinder 501. The clamping rod 503 is arranged at one end of the sliding column 502 and rotates with the rotation of the sliding column 502. The advantage of such a design of the clamping device 5 is that when installing and removing the mounting plate 4, the clamping rod 503 will not be located directly above the mounting groove 301, and will not affect the installation and removal of the mounting plate 4.

[0046] Furthermore, the sliding column 502 has a first groove 5022, and the first groove 5022 has a first abutment portion 5023. The clamping device 5 also includes a first rack 6, and the first rack 6 has a second abutment portion 7. The first rack 6 is rotatably set in the first groove 5022, and the first abutment portion 5023 abuts against the second abutment portion 7: the first gear 8 is rotatably set in the first cavity 201 and is transmission-connected to the first rack 6. The first rack 6 drives the sliding column 502 to slide in the sliding cylinder 501.

[0047] In this embodiment, a first groove 5022 is provided in the sliding column 502, and the first groove 5022 has a first abutment portion 5023. A first rack 6 is also provided, and the first rack 6 has a second abutment portion 7. The first rack 6 is rotatably provided in the first groove 5022, and the first abutment portion 5023 and the second abutment portion 7 abut against each other. When the first gear 8 rotates in the first cavity 201, the first gear 8 drives the first rack 6 to move. Since the first rack 6 is provided in the sliding column 502, it can drive the sliding column 502 to slide in the sliding cylinder 501. While sliding, the first protrusion 5021 slides in the spiral guide rail, so that the sliding column 502 rotates while sliding, thereby completing the clamping operation of the clamping device 5.

[0048] Furthermore, there are two clamping devices 5 , which are arranged at both ends of the mounting platform 3 and are used to clamp the mounting plate 4 .

[0049] In this embodiment, two clamping devices 5 are provided to clamp the mounting plate 4 from both ends. The advantage is that the mounting plate 4 can be stably clamped in the mounting groove 301 to prevent the mounting plate 4 from falling off during detection.

[0050] Furthermore, it also includes a handle 9, which is rotatably arranged on one side of the shell 2, and one end of the handle 9 is located in the first cavity 201; the second gear 10 is located in the first cavity 201, and is arranged at one end of the handle 9; the second rack 11 is relatively horizontally slidably arranged in the first cavity 201, and is transmission connected to the second gear 10; there are two third gears 12, and the third gears 12 are arranged at one end of the first gear 8, coinciding with the axis of the first gear 8, and the third gears 12 are all transmission connected to the same side of the second rack 11.

[0051] In this embodiment, a handle 9 is additionally provided, and the handle 9 is rotatably set on the outer shell 2, with one end located in the first cavity 201. The handle 9 drives the second gear 10 in the first cavity 201 to rotate. Since the second gear 10 is meshed with the second rack 11 for transmission, the second gear 10 will drive the second rack 11 to move after it rotates. Two third gears 12 are also added, and the third gear 12 is set on the same side of the second rack 11. When the second rack 11 moves, it drives the two third gears 12 to rotate in the same direction. The third gear 12 is set at one end of the first gear 8, and the axes of the two coincide. The rotation of the third gear 12 can drive the first gear 8 to rotate, thereby realizing the clamping operation of the clamping device 5.

[0052] Furthermore, it also includes an abutment block 13 , which is arranged at one end of the clamping rod 503 , and the clamping rod 503 abuts against the mounting plate 4 through the abutment block 13 .

[0053] In this embodiment, an abutment block 13 is added to one end of the clamping rod 503. When the clamping device 5 performs the clamping operation, the abutment block 13 contacts the mounting plate 4, thereby pressing the mounting plate 4 into the mounting groove 301. The advantage is that the abutment block 13 is made of rubber material, which prevents the mounting plate 4 from being crushed during the abutment process.

[0054] Furthermore, it also includes a sliding rod 14 , which is disposed in the first cavity 201 , and the second rack 11 is slidably disposed on the sliding rod 14 .

[0055] In this embodiment, a sliding rod 14 is added in the first cavity 201, and the second rack 11 is slidably set on the sliding rod 14. The advantage is that the overall structure is more complete, and the operation of turning the handle 9 and the clamping device 5 will press the mounting plate 4 into the mounting groove 301 is realized.

[0056] Furthermore, it also includes a sensing point 15 , which is arranged in the installation groove 301 ; a number of high-frequency line connectors 16 , which are arranged on one side of the housing 2 and are electrically connected to the sensing point 15 .

[0057] In this embodiment, there is a sensing point 15 in the mounting groove 301 to sense whether the surface wave filter is properly pressed in the mounting groove 301; the sensing point 15 is electrically connected to the high-frequency line connector 16 arranged on the side of the housing 2. The specific use process of the device is to first install the surface wave filter on the mounting plate 4, and then place the mounting plate 4 in the mounting groove 301. After the placement is completed, the handle 9 is twisted to drive the second gear 10 to rotate, so that the second rack 11 slides on the sliding rod 14, and the two third gears 12 connected to the sliding rod 14 will rotate in the same direction. Since the third gear 12 is arranged at one end of the first gear 8 and the axes of the two coincide, the first gear 8 will rotate synchronously after the third gear 12 rotates, driving the first rack 6 to move, driving the sliding column 502 to slide and rotate in the sliding cylinder 501, and realizing the pressing operation. After the pressing is completed, the high-frequency line is used to electrically connect the high and low temperature test fixture of the surface acoustic wave filter to the network analyzer. After the connection is completed, the high and low temperature test fixture of the surface acoustic wave filter is placed in a high temperature or low temperature device for testing.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A high and low temperature test fixture for surface acoustic wave filters, used to fix a device to be tested (1), characterized in that: include: A housing (2), wherein the housing (2) has a first cavity (201) inside; A mounting platform (3), the mounting platform (3) having a mounting groove (301), the mounting platform (3) being arranged on the upper surface of the housing (2); A mounting plate (4), the mounting plate (4) being arranged in the mounting groove (301) and being used for mounting the device (1); A pressing device (5), wherein the pressing device (5) comprises: A sliding cylinder (501), the inner wall of the sliding cylinder (501) having a spiral sliding groove (5011), the sliding cylinder (501) being arranged on the mounting platform (3), one end of the sliding cylinder (501) passing through the mounting platform (3) and the housing (2), and then being located in the first cavity (201); A sliding column (502), the sliding column (502) is relatively rotatable and slidably disposed in the sliding cylinder (501), the sliding column (502) has a first protrusion (5021) on the outside, and the first protrusion (5021) is slidably disposed in the spiral sliding groove (5011); A pressing rod (503), the pressing rod (503) being arranged at one end of the sliding column (502) and being used for pressing the mounting plate (4) into the mounting groove (301).

2. The high and low temperature test fixture for surface acoustic wave filters according to claim 1, characterized in that: The sliding column (502) has a first groove (5022) therein, and the first groove (5022) has a first abutment portion (5023) therein. The pressing device (5) further comprises: A first rack (6), wherein the first rack (6) has a second abutment portion (7), the first rack (6) is rotatably disposed in the first groove (5022), and the first abutment portion (5023) abuts against the second abutment portion (7): A first gear (8), the first gear (8) is rotatably disposed in the first cavity (201) and is transmission-connected to the first rack (6), and the first rack (6) drives the sliding column (502) to slide in the sliding cylinder (501).

3. The high and low temperature test fixture for surface acoustic wave filters according to claim 1, characterized in that: The clamping devices (5) are provided in two pieces, and are arranged at two ends of the mounting platform (3) and are used to clamp the mounting plate (4).

4. The high and low temperature test fixture for surface acoustic wave filters according to claim 2, characterized in that: Also includes: a handle (9), the handle (9) being rotatably disposed on one side of the housing (2), and one end of the handle (9) being located in the first cavity (201); a second gear (10), the second gear (10) being located in the first cavity (201) and arranged at one end of the handle (9); a second rack (11), the second rack (11) being relatively horizontally slidably disposed in the first cavity (201) and being transmission-connected to the second gear (10); The third gear (12) has two third gears (12), the third gears (12) are arranged at one end of the first gear (8) and coincide with the axis of the first gear (8), and the third gears (12) are both transmission-connected to the same side of the second rack (11).

5. The high and low temperature test fixture for surface acoustic wave filters according to claim 1, characterized in that: Also includes: An abutment block (13), wherein the abutment block (13) is arranged at one end of the clamping rod (503), and the clamping rod (503) abuts against the mounting plate (4) via the abutment block (13).

6. The high and low temperature test fixture for surface acoustic wave filters according to claim 4, characterized in that: Also includes: A sliding rod (14), wherein the sliding rod (14) is arranged in the first cavity (201), and the second rack (11) is slidably arranged on the sliding rod (14).

7. The high and low temperature test fixture for surface acoustic wave filters according to claim 1, characterized in that: Also includes: A sensing point (15), the sensing point (15) being arranged in the mounting groove (301); A high-frequency line connector (16), wherein the number of the high-frequency line connectors (16) is several, and the high-frequency line connectors (16) are arranged on one side of the housing (2) and are electrically connected to the sensing point (15).

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