A general debugging tool for Chebyshev crystal filter

Abstract

This utility model discloses a universal debugging fixture for Chebyshev crystal filters, specifically relating to the field of debugging fixtures. It includes a vertically arranged first clamping seat, a second clamping seat parallel to one side of the first clamping seat, and two horizontally arranged guide rods fixedly mounted at the bottom of the first clamping seat. The ends of both guide rods are inserted into the outside of the second clamping seat. A fixing plate for supporting the Chebyshev crystal filter is fixedly connected to the inner bottom wall of the first clamping seat. Both the first and second clamping seats have SMA connector slots in their middle sections for the SMA connectors on the Chebyshev crystal filter to pass through. This utility model utilizes the ability to stably clamp the crystal filter simultaneously in both horizontal and vertical directions, facilitating subsequent operations. The clamping distance in both horizontal and vertical directions can be freely adjusted according to the size of the Chebyshev crystal filter, making it highly adaptable.

Description

Technical Field

[0001] This utility model relates to the field of debugging tooling, and more specifically, to a general debugging tooling for Chebyshev crystal filters. Background Technology

[0002] Chebyshev crystal filters are narrowband filters designed based on the resonant characteristics of piezoelectric crystals. Due to their steep roll-off characteristics, low insertion loss, and high selectivity, they are widely used in communications, radar, electronic countermeasures, and precision measurement. For example, in 5G communication base stations, Chebyshev filters are used to suppress adjacent channel interference; in satellite communication systems, their high rectangular coefficient characteristics can effectively separate dense signal frequency bands. Currently, the requirements for the structural size of crystal filters are becoming increasingly smaller. Previously, the size of SMA connectors limited the shape of crystal filters, requiring them to be compatible with the SMA connectors used for debugging, thus preventing further reduction in size. Small-sized SMA connector mounting holes often conflict with the air cavity structure, necessitating the use of larger connectors and increasing the overall size. Therefore, a fixture is needed for debugging small-sized high-frequency filters, allowing the filter to be debugged with an external SMA connector, thereby avoiding direct mounting holes in the cavity structure. Simultaneously, the fixture should be as universal as possible.

[0003] To address the aforementioned issues with the debugging fixture, a search revealed that Chinese Patent No. CN214099853U discloses a filter debugging fixture that facilitates the use of external SMA connectors for debugging high-frequency filters. This fixture is convenient for loading, fixing, and conducting the filters for debugging, and can accommodate filters of a certain size range.

[0004] However, in actual use, the filter debugging fixture designed above only adopts a horizontal clamping structure, and the clamping adjustment requires frequent tightening and loosening of the bolt structure, which is relatively complicated to operate. In addition, it lacks clamping of the crystal filter in the vertical direction, and the sliding groove designed for placing the crystal filter cannot be well adapted to crystal filters of different sizes. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a universal debugging tool for Chebyshev crystal filters.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a universal debugging fixture for a Chebyshev crystal filter, comprising a vertically arranged first clamping seat, a second clamping seat arranged parallel to one side of the first clamping seat, two horizontally arranged guide bars fixedly arranged at the bottom of the first clamping seat, the ends of the two guide bars being inserted into the outside of the second clamping seat, a fixing plate for supporting the Chebyshev crystal filter being fixedly connected to the bottom inner sidewall of the first clamping seat, an SMA connector through-hole for the SMA connector on the Chebyshev crystal filter to pass through in the middle of both the first and second clamping seats, a locking mechanism being provided between the two bottom outer walls of the second clamping seat and the two guide bars, and a stabilizing mechanism for clamping the Chebyshev crystal filter in the vertical direction being provided at the top of the first clamping seat.

[0007] As a further improvement to the technical solution of this utility model, the bottom of the second clamping seat is provided with a rectangular hole for two guide crossbars to pass through, and the length and width of the vertical cross section of the rectangular hole are greater than the length and width of the vertical cross section of the guide crossbars, respectively.

[0008] As a further improvement to the technical solution of this utility model, the locking mechanism includes a groove provided on the outer wall of the guide crossbar, the groove being uniformly provided with teeth, a rod being vertically inserted into the outer wall of the second clamping seat, one end of the rod being provided with a toothed head that engages with the teeth, and the other end of the rod being fixedly connected to a pull plate on the outer side of the second clamping seat, and a spring being connected between the inner side wall of the pull plate and the outer wall of the second clamping seat.

[0009] As a further improvement to the technical solution of this utility model, the length and width of the vertical cross-section of the socket are greater than the length and width of the vertical cross-section of the insertion rod, respectively.

[0010] As a further improvement to the technical solution of this utility model, the connection between the two ends of the spring and the inner side wall of the pull plate and the outer wall of the second clamping seat is welded. When the spring is in its natural state, the insert head and the tooth pattern remain inserted.

[0011] As a further improvement to the technical solution of this utility model, the stabilizing mechanism includes a connecting plate fixedly connected to the inner side wall of the top of the first clamping seat, a screw connected vertically inside the connecting plate, a handwheel fixedly connected to the top of the screw above the connecting plate, and a lifting pressure plate connected to the bottom of the screw above the Chebyshev crystal filter.

[0012] As a further improvement to the technical solution of this utility model, the connecting plate is provided with an internal threaded hole corresponding to the connection of the screw, and a bearing seat is installed on the top of the lifting pressure plate at the end position corresponding to the screw.

[0013] As a further improvement to the technical solution of this utility model, one end of the lifting pressure plate is provided with a T-shaped locking block connected to the inner side wall of the first clamping seat, and the inner side wall of the first clamping seat is provided with a T-shaped sliding groove in the vertical direction corresponding to the outer side of the T-shaped locking block.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model utilizes a first clamping seat and a second clamping seat to stably clamp the crystal filter in the horizontal direction. Through the locking mechanism, before adjusting the spacing, the pull plate can be pulled outward to move the insertion rod outward. At this time, the spring is in a stretched state, and the insertion tooth head disengages from the tooth pattern. After the crystal filter is placed on the fixed plate, the second clamping seat is moved towards the first clamping seat, maintaining a horizontal clamping state on the crystal filter. At this time, the pull plate is released, and under the action of the spring reset, the insertion rod and the insertion tooth head move inward, and the insertion tooth head is locked on the tooth pattern, thus fixing the crystal filter in the horizontal direction. The operation is simple, convenient and effortless.

[0016] 2. Through the stabilizing mechanism, during use, rotating the handwheel drives the screw to rotate, thereby causing the lifting pressure plate to rise and fall vertically. The lifting pressure plate, in conjunction with the fixed plate, clamps the crystal filter vertically, further improving the stability of the Chebyshev crystal filter during debugging. The clamping fixture designed in this application provides a stable clamping solution for the Chebyshev crystal filter, facilitating subsequent operations. The clamping distance in both the horizontal and vertical directions can be freely adjusted according to the size of the Chebyshev crystal filter, making it suitable for clamping crystal filters of different sizes and offering high versatility. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the first clamping seat and the structure on the first clamping seat in this utility model.

[0019] Figure 3 This utility model Figure 1 Enlarged view of section A.

[0020] Figure 4 This is a schematic diagram of the structure of the second clamping seat in this utility model.

[0021] Figure 5 This is a cross-sectional view of the connection between the insert rod and the second clamping seat in this utility model.

[0022] The attached figures are labeled as follows: 1. First clamping seat; 2. Second clamping seat; 3. Guide crossbar; 4. Fixing plate; 5. Lifting pressure plate; 6. Groove; 7. Toothed pattern; 8. Insert rod; 9. Insert tooth head; 10. Pull plate; 11. Spring; 12. Connecting plate; 13. Screw; 14. Handwheel; 15. Bearing seat; 16. T-shaped locking block; 17. T-shaped slide groove; 201. SMA connector through hole; 202. Rectangular hole; 203. Socket. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] As attached Figure 1-5 The diagram shows a general-purpose debugging fixture for a Chebyshev crystal filter, comprising a vertically arranged first clamping seat 1, a second clamping seat 2 arranged parallel to one side of the first clamping seat 1, two horizontally arranged guide bars 3 fixedly arranged at the bottom of the first clamping seat 1, the ends of the two guide bars 3 being inserted into the outside of the second clamping seat 2, a fixing plate 4 for supporting the Chebyshev crystal filter being fixedly connected to the bottom inner side wall of the first clamping seat 1, an SMA connector through-hole 201 for the SMA connector on the Chebyshev crystal filter to pass through in the middle of the first clamping seat 1 and the second clamping seat 2, a locking mechanism being provided between the two bottom outer walls of the second clamping seat 2 and the two guide bars 3, and a stabilizing mechanism for clamping the Chebyshev crystal filter in the vertical direction being provided at the top of the first clamping seat 1.

[0025] As attached Figure 1 and attached Figure 3 As shown, the bottom of the second clamping seat 2 is provided with a rectangular hole 202 for the two guide crossbars 3 to pass through. The length and width of the vertical cross section of the rectangular hole 202 are larger than the length and width of the vertical cross section of the guide crossbar 3, which facilitates the guide crossbar 3 to pass through the interior of the second clamping seat 2 stably, so that the horizontal movement is more stable when the distance between the second clamping seat 2 and the first clamping seat 1 is adjusted.

[0026] As attached Figure 1-2 and attached Figure 4-5As shown, the locking mechanism includes a groove 6 on the outer wall of the guide crossbar 3, with teeth 7 evenly arranged inside the groove 6. A rod 8 is vertically inserted into the outer wall of the second clamping seat 2. One end of the rod 8 is provided with a toothed head 9 that engages with the teeth 7, and the other end of the rod 8 is fixedly connected to a pull plate 10 on the outer side of the second clamping seat 2. A spring 11 is connected between the inner wall of the pull plate 10 and the outer wall of the second clamping seat 2. The length and width of the vertical section of the insertion port 203 are greater than the length and width of the vertical section of the rod 8, respectively. The connection between both ends of the spring 11 and the inner wall of the pull plate 10 and the outer wall of the second clamping seat 2 is welded. When the spring 11 is in its natural state, the toothed head 9 remains engaged with the teeth 7. The locking mechanism facilitates position locking after adjusting the distance between the second clamping seat 2 and the first clamping seat 1.

[0027] As attached Figure 1-3 As shown, the stabilizing mechanism includes a connecting plate 12 fixedly connected to the inner sidewall of the top of the first clamping seat 1. A screw 13 is connected vertically inside the connecting plate 12. A handwheel 14 is fixedly connected to the top of the screw 13 above the connecting plate 12, and a lifting pressure plate 5 is connected to the bottom of the screw 13 above the Chebyshev crystal filter. An internal threaded hole with matching thread is provided inside the connecting plate 12 corresponding to the connection point of the screw 13. A bearing seat 15 is installed at the top of the lifting pressure plate 5 corresponding to the end position of the screw 13. A T-shaped locking block 16 connected to the inner sidewall of the first clamping seat 1 is provided at one end of the lifting pressure plate 5. A T-shaped sliding groove 17 is provided vertically on the inner sidewall of the first clamping seat 1 corresponding to the outer side of the T-shaped locking block 16. The stabilizing mechanism facilitates the use of the fixed plate 5 to maintain a stable clamping state of the Chebyshev crystal filter in the vertical direction.

[0028] Working principle: This invention designs a universal debugging fixture for Chebyshev crystal filters, the specific structure of which is shown in the attached instruction manual. Figure 1-5As shown, in this technical solution, the first clamping seat 1 and the second clamping seat 2 are arranged in parallel. The guide bar 3 is used to maintain the stable adjustment of the distance between the second clamping seat 2 and the first clamping seat 1. Then, the distance between the two clamping seats is adjusted according to the crystal filter of different sizes. Through the locking mechanism, before the distance adjustment, the pull plate 10 can be pulled outward to drive the insertion rod 8 to move outward. At this time, the spring 11 is in the stretched state, the insertion tooth head 9 disengages from the tooth 7, and after the crystal filter is placed on the fixed plate 4, the second clamping seat 2 is moved towards the first clamping seat 1, and the crystal filter is kept in a horizontal clamping state. At this time, the pull plate 10 is released, and under the action of the spring 11 resetting, the insertion rod 8 and the insertion... The toothed head 9 moves inward and locks itself onto the toothed groove 7, thus fixing the crystal filter horizontally. Then, through the stabilizing mechanism, during use, the handwheel 14 is turned to drive the screw 13 to rotate, thereby driving the lifting pressure plate 5 to rise and fall vertically. The lifting pressure plate 5, together with the fixing plate 4, clamps the crystal filter vertically, further improving the stability of the Chebyshev crystal filter during debugging. The clamping fixture designed in this application provides a stable clamping state for the Chebyshev crystal filter, facilitating subsequent operations. The clamping distance in the horizontal and vertical directions can be freely adjusted according to the size of the Chebyshev crystal filter, making it highly adaptable.

[0029] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A general debugging tool for Chebyshev crystal filter, comprising a first clamping seat (1) arranged vertically, a second clamping seat (2) arranged in parallel on one side of the first clamping seat (1), characterized in that: The bottom of the first clamping seat (1) is fixedly provided with two horizontally arranged guide bars (3), and the ends of the two guide bars (3) are inserted into the outside of the second clamping seat (2). The bottom inner wall of the first clamping seat (1) is fixedly connected with a fixing plate (4) for supporting the Chebyshev crystal filter. The middle of the first clamping seat (1) and the second clamping seat (2) is provided with an SMA connector through hole (201) for the SMA connector on the Chebyshev crystal filter to pass through. The bottom two outer walls of the second clamping seat (2) are provided with a locking mechanism between the two guide bars (3). The top of the first clamping seat (1) is provided with a stabilizing mechanism for clamping the Chebyshev crystal filter in the vertical direction.

2. The universal tuning tool for Chebyshev crystal filter according to claim 1, characterized in that: The bottom of the second clamping seat (2) is provided with a rectangular hole (202) for the two guide bars (3) to pass through. The length and width of the vertical section of the rectangular hole (202) are greater than the length and width of the vertical section of the guide bar (3).

3. The general-purpose tuning tool for Chebyshev crystal filters according to claim 1, characterized in that: The locking mechanism includes a groove (6) on the outer wall of the guide bar (3), and teeth (7) are evenly arranged inside the groove (6). A rod (8) is vertically inserted into the outer wall of the second clamping seat (2). One end of the rod (8) is provided with a tooth head (9) that engages with the teeth (7), and the other end of the rod (8) is fixedly connected to a pull plate (10) on the outer side of the second clamping seat (2). A spring (11) is connected between the inner side wall of the pull plate (10) and the outer wall of the second clamping seat (2).

4. The universal debugging fixture for the Chebyshev crystal filter according to claim 3, characterized in that: The length and width of the vertical section of the socket (203) are greater than the length and width of the vertical section of the plug (8).

5. The universal debugging fixture for the Chebyshev crystal filter according to claim 3, characterized in that: The connection between the two ends of the spring (11) and the inner wall of the pull plate (10) and the outer wall of the second clamping seat (2) is welded. When the spring (11) is in its natural state, the insert head (9) and the tooth pattern (7) remain in contact.

6. The universal debugging fixture for the Chebyshev crystal filter according to claim 1, characterized in that: The stabilizing mechanism includes a connecting plate (12) fixedly connected to the inner side wall of the top of the first clamping seat (1). A screw (13) is connected vertically inside the connecting plate (12). A handwheel (14) is fixedly connected above the connecting plate (12) at the top of the screw (13), and a lifting pressure plate (5) is connected above the Chebyshev crystal filter at the bottom of the screw (13).

7. The universal debugging fixture for the Chebyshev crystal filter according to claim 6, characterized in that: The connecting plate (12) has an internal threaded hole that matches the thread at the connection point of the screw (13), and a bearing seat (15) is installed at the top of the lifting plate (5) at the end position of the screw (13).

8. The universal debugging fixture for the Chebyshev crystal filter according to claim 6, characterized in that: One end of the lifting pressure plate (5) is provided with a T-shaped card block (16) connected to the inner side wall of the first clamping seat (1), and the inner side wall of the first clamping seat (1) is provided with a T-shaped groove (17) in the vertical direction corresponding to the outside of the T-shaped card block (16).

Images