Communication filter with resonance adjusting screw rod adjustable structure

Abstract

The utility model discloses a communication filter with a resonance adjusting screw rod adjustable structure, which comprises a shell, a resonance rod used for carrying out resonance adjustment on the filter is arranged at the bottom end in the shell through an elastic telescopic piece, and a resonance screw rod used for adjusting the resonance rod is movably connected to the top end of the resonance rod in a penetrating manner. According to the utility model, when the resonance screw rotates in the cavity to drive the resonance rod to adjust and rotate, after the resonance rod is adjusted and rotated, the pulling plate piece slides to drive one end of the movable positioning rod to be inserted into the positioning slot in the limiting ring slot, so that the resonance screw after screwing and adjusting is positioned; the stability of the resonance rod can be guaranteed after screwing adjustment, the vibration rotation phenomenon is avoided, the stability of the communication filter resonance rod after adjustment is improved, the resonance rod rotation phenomenon caused by vibration is avoided, and stable adjustment of the resonance rod is further achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter adjustment mechanisms, and in particular relates to a communication filter with an adjustable resonance adjustment screw structure. Background Art

[0002] The filter is a filter circuit composed of capacitors, inductors and resistors. The filter can effectively filter out the frequency point of a specific frequency in the power line or the frequency outside the frequency point to obtain a power signal of a specific frequency, or eliminate the power signal after a specific frequency. The filter has always played an extremely important role in the processing of electronic signals. It has the function of allowing useful signals to pass as little as possible without attenuation and attenuating useless signals as much as possible. Filters are widely used in radio frequency, microwave and other communication fields. Existing filters generally use metal screws for adjustment. The metal screws and the filter cover are fixed with nuts. When adjusting, the screws are rotated to change the distance between the screws and the resonant rods, thereby achieving frequency adjustment; when adjusting, the filter will repeatedly loosen the nuts, rotate the screws, and lock the nuts. There are the following disadvantages: 1. The adjustment efficiency is low; 2. It is not easy to achieve automatic adjustment; 3. It is easy for metal chips to enter the inner cavity during adjustment, resulting in short circuits or power sparks.

[0003] To this end, a screw-type screw filter with announcement number "CN218070159U" includes a cavity, a tuning cover, a resonant rod, and a tuning screw; the cavity is a cylindrical cavity, and a round convex column is provided in the center of the bottom of the cavity; the tuning cover is provided with a circular ring groove and a screw hole, and the groove is provided with a groove bottom plate; the beneficial effects are: 1. The tuning screw adjustment method makes the filter simpler and greatly improves the debugging efficiency; 2. The screw height is no longer reserved above the tuning cover, thereby reducing the product volume; 3. The product cost is reduced; 4. It is easier to realize production automation; 5. No metal chips are generated during adjustment, thereby improving the quality of the product.

[0004] However, for the filter with the above-mentioned screw-type screw, although the tuning screw is rotated to apply downward pressure on the tuning cover of the filter, since the groove bottom plate is a thin sheet, the groove bottom plate is easily deformed, thereby changing the distance between the tuning cover and the upper end surface of the resonance rod to achieve frequency adjustment. However, there are still the following obvious defects during use: in the process of adjusting the above-mentioned resonance rod using the tuning screw, since the bottom end of the cavity inside the cavity is a smooth surface, the tuning screw will rotate slowly after being screwed and adjusted due to the smooth surface of the cavity and the vibration of the equipment during operation, thereby causing the tuning screw to loosen and rotate without being positioned after adjusting the resonance rod. Utility Model Content

[0005] The utility model aims to provide a communication filter with an adjustable structure of a resonance adjusting screw rod, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a communication filter with an adjustable structure of a resonant adjustment screw, comprising:

[0007] A housing, wherein a resonant rod for adjusting the resonance of the filter is provided at the bottom of the housing through an elastic telescopic member, and a resonant screw for adjusting the resonant rod is movably connected to the top of the resonant rod;

[0008] A tuning end cover is installed at the end of the shell and has a cavity that is conducive to the rotation adjustment of the resonant screw. A positioning sleeve is provided on one side of the bottom end of the cavity and a movable positioning rod is provided for inserting and positioning the resonant screw after rotation adjustment.

[0009] Preferably, a movable groove with an inverted L-shaped structure is opened on one side of the end of the tuning end cover, and an L-shaped pulling plate is movably provided in the movable groove. The pulling plate can move the movable positioning rod to loosen the resonant screw insertion positioning placement.

[0010] Preferably, one end of the movable positioning rod is movable and penetrates into one end of the inner part of the movable groove, and one side of the pulling plate is fixedly connected to one end of the movable positioning rod, thereby strengthening the adjustment of the resonance rod to avoid looseness and improve the firmness of the resonance rod.

[0011] Preferably, the resonant screw moves through the interior of the cavity, and a limiting ring groove is provided on one end surface of the resonant screw, and positioning slots for positioning the rotation of the resonant screw are evenly arranged inside the limiting ring groove, thereby realizing the positioning of the resonant screw after adjusting the resonant rod and avoiding looseness.

[0012] Preferably, a driving connection slot with an internal hexagonal structure is opened at the end of the resonance rod, and one end of the resonance screw is movably inserted into the interior of the driving connection slot, so that the resonance screw can limit the resonance rod and drive the rotation to achieve resonance adjustment of the signal filter.

[0013] Preferably, the elastic telescopic part includes a hollow cylinder arranged at the bottom end of the shell, a reset elastic part is provided inside the hollow cylinder, and a telescopic sleeve rod is connected to the external limiting sleeve of the hollow cylinder, which is beneficial to maintaining a certain stability during the rotation adjustment of the resonance rod and facilitating the rotational movement of the resonance rod.

[0014] Preferably, a positioning top block is provided at the external top end of the telescopic sleeve rod, and an active cavity for inserting the resonance rod for tightening is opened at the end of the positioning top block, which is used to position the bottom end of the resonance rod to avoid tilting of one end of the resonance rod.

[0015] Preferably, the resonant screw is provided with a screw seat at one end inside the cavity, and an auxiliary screw groove is provided at the center position of the end of the screw seat, so that the resonant screw can be rotated with the help of an external hexagonal tool without causing the resonant rod to bulge outward and occupy space.

[0016] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the communication filter with an adjustable structure of a resonant adjustment screw, through the arrangement and combination of the resonant screw, cavity, movable positioning rod, movable groove, pull plate, limit ring groove and positioning slot, makes the resonant screw rotate inside the cavity to drive the resonant rod to rotate for adjustment, and after the adjustment rotation, the resonant rod uses the pull plate to slide and drive one end of the movable positioning rod to be inserted into the positioning slot in the limit ring groove to position the resonant screw after the adjustment, so that the stability of the resonant rod after the adjustment can be guaranteed without vibration and rotation, thereby improving the stability of the resonant rod of the communication filter after adjustment, so that the phenomenon of vibration causing the resonant rod to rotate will not occur, and further realizing the stable adjustment of the resonant rod.

[0017] Through the combination of a hollow cylinder, a reset elastic part, a telescopic sleeve, a positioning top block, and a movable cavity, the bottom of the resonance rod can be movably arranged inside the movable cavity in the positioning top block, and the vertical stability can be maintained during the rotation adjustment of the resonance rod. The phenomenon that one end of the resonance rod rotates too much and the thick line position is offset and stuck inside the shell will not occur, thereby facilitating the screwing adjustment of the resonance rod and making the communication filter more stable and convenient to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the top view of the structure of the harmonized end cover of the utility model;

[0020] Figure 3 This is a schematic diagram of the main structure of the resonant screw of the utility model;

[0021] Figure 4 This is a schematic diagram of the main structure of the elastic telescopic member of the utility model;

[0022] Figure 5 It is a schematic diagram of the top view structure of the resonant rod of the utility model.

[0023] In the figure: 1. Shell; 2. Resonant rod; 3. Resonant screw; 4. Tuning end cover; 5. Cavity; 6. Movable positioning rod; 7. Movable groove; 8. Pull plate; 9. Limiting ring groove; 10. Positioning slot; 11. Drive connection slot; 12. Hollow cylinder; 13. Reset elastic member; 14. Telescopic sleeve; 15. Positioning top block; 16. Movable cavity; 17. Screw seat; 18. Auxiliary screw groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 The utility model provides a technical solution: a communication filter with an adjustable structure of a resonant adjustment screw, comprising:

[0026] A shell 1, wherein a resonant rod 2 for adjusting the resonance of the filter is provided at the bottom of the shell 1 through an elastic telescopic member, so that the resonant rod 2 can have a certain elasticity in the screwing adjustment by means of the elastic telescopic member, making the adjustment of the resonant rod 2 simpler and easier, and a resonant screw 3 for adjusting the resonant rod 2 is movably connected to the top of the resonant rod 2, and the resonant screw 3 is movably connected to the tuning end cover 4 and the penetration position is sealed by a rubber sealing ring, so as to effectively prevent dust from entering the interior of the shell 1 and firmly position the resonant screw 3. The tuning end cover 4 is installed at the end of the shell 1 and has a cavity 5 that is conducive to the rotation and adjustment of the resonance screw 3. The resonance screw 3 can be screwed and rotated on the inner side of the cavity 5, so that the resonance screw 3 and the surface of the tuning end cover 4 are kept flush and will not occupy the space where the communication filter is installed on the equipment. A positioning sleeve is provided on one side of the bottom end of the cavity 5 for inserting and positioning the resonance screw 3 after rotation and adjustment, so that the resonance screw 3 can be limited in the limiting ring groove 9 by one end of the movable positioning rod 6 after rotation and adjustment to maintain stability.

[0027] The end of the tuning end cover 4 is provided with a movable groove 7 with an inverted L-shaped structure on one side, so that the pull plate 8 can slide back and forth inside the movable groove 7 to drive the movable positioning rod 6 to move and position the resonant screw 3. The movable groove 7 is movably provided with an L-shaped pull plate 8 to realize the reciprocating pulling of the movable positioning rod 6. One end of the movable positioning rod 6 is movably penetrated into one end of the movable groove 7, so that the bottom side of one side of the pull plate 8 is fixed to the end of the movable positioning rod 6 located inside the movable groove 7, and one side of the pull plate 8 is fixedly connected to one end of the movable positioning rod 6. The resonant screw 3 is movably penetrated into the interior of the cavity 5, so that the movable positioning rod 6 can be stably reciprocated and pulled, and one end surface of the resonant screw 3 is provided with The limiting ring groove 9 allows one end of the movable positioning rod 6 to enter the inside of the limiting ring groove 9 to position the resonance screw 3. The inside of the limiting ring groove 9 is evenly provided with positioning slots 10 for rotating and positioning the resonance screw 3, so that the resonance screw 3 can be positioned by inserting the movable positioning rod 6 into the positioning slot 10 after rotation adjustment, thereby enhancing the firmness and stability of the resonance screw 3 after adjustment. The end of the resonance rod 2 is provided with a driving connection slot hole 11 with an internal hexagonal structure, and one end of the resonance screw 3 is movably inserted into the inside of the driving connection slot hole 11, and one end of the resonance screw 3 is an external hexagonal structure, so that a hexagonal wrench can be inserted into the inside of the driving connection slot hole 11 to rotate the resonance screw 3 and adjust the rotation of the resonance rod 2.

[0028] The elastic telescopic member includes a hollow cylinder 12 arranged at the bottom end of the shell 1, and a reset elastic member 13 can be arranged inside the hollow cylinder 12. A reset elastic member 13 is arranged inside the hollow cylinder 12, and one end of the reset elastic member 13 is fixed at the center of the ground inside the shell 1, and the outer limit sleeve of the hollow cylinder 12 is connected with a telescopic sleeve rod 14, which can realize the elastic and stable support of the resonance rod 2 during the adjustment process. A positioning top block 15 is provided at the outer top end of the telescopic sleeve rod 14, which is used for the elastic tightening of the resonance rod 2 during the rotation. An active cavity 16 is opened at the end of the positioning top block 15 for inserting the resonance rod 2 for tightening. The resonance screw 3 is located at one end of the cavity 5 and is provided with a screw seat 17. The center position of the end of the screw seat 17 is provided with an auxiliary screw groove 18, and it is a hexagonal structure to realize the rotation adjustment of the resonance screw 3.

[0029] Specifically, when using, first push the pull plate 8 to move to one side inside the movable groove 7 before adjustment. The movement of the pull plate 8 to one side drives the bottom end of the connected movable positioning rod 6 to move to one side as well, so that the other end of the movable positioning rod 6 moves out of the positioning slot 10. One end of the movable positioning rod 6 that has disengaged from the positioning slot 10 is inside the limiting ring groove 9, which can limit the rotation of the resonant screw 3. Then, use a hexagonal wrench to insert one end of the movable positioning rod 6 into the auxiliary screwing groove 18 in the screwing seat 17, and the rotation of the hexagonal wrench drives the screwing seat 17 to rotate in the cavity 5. The screwing seat 17 The rotation drives the resonance screw 3 to rotate. The rotation of the resonance screw 3 makes one end of the resonance screw 3 be an outer hexagonal surface and the other end be inserted into the hexagonal inner groove at the end of the resonance rod 2, driving the resonance rod 2 to rotate and adjust. After the resonance rod 2 is adjusted, the pull plate 8 is pulled back to drive the movable positioning rod 6 to move back. The movement of the movable positioning rod 6 moves one end of the movable positioning rod 6 to be inserted into the positioning slot 10, which can locate the position of the rotationally adjusted resonance screw 3, and can prevent the resonance rod 2 from being affected by vibration during adjustment and causing the resonance rod 2 to rotate, thereby further improving the firmness and stability of the resonance rod 2 after adjustment.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A communication filter with an adjustable resonance adjustment screw structure, characterized in that: include: A shell (1), wherein a resonant rod (2) for adjusting the resonance of the filter is provided at the bottom end of the shell (1) via an elastic telescopic member, and a resonant screw (3) for adjusting the resonant rod (2) is movably connected to the top end of the resonant rod (2); A tuning end cover (4) is installed at the end of the housing (1) and is provided with a cavity (5) that is conducive to the rotation adjustment of the resonant screw (3); a movable positioning rod (6) is provided on one side of the bottom end of the cavity (5) through a positioning sleeve for inserting and positioning the resonant screw (3) after rotation adjustment.

2. A communication filter with an adjustable resonance adjustment screw structure according to claim 1, characterized in that: A movable groove (7) with an inverted L-shaped structure is provided on one side of the end of the harmonic end cover (4), and an L-shaped pulling plate (8) is movably provided in the movable groove (7).

3. A communication filter with an adjustable resonance adjustment screw structure according to claim 2, characterized in that: One end of the movable positioning rod (6) is movably inserted into one end of the inner part of the movable groove (7), and one side of the pulling plate (8) is fixedly connected to one end of the movable positioning rod (6).

4. A communication filter with an adjustable resonance adjustment screw structure according to claim 1, characterized in that: The resonant screw (3) is movable and penetrates into the interior of the cavity (5), and a limiting annular groove (9) is provided on one end surface of the resonant screw (3), and positioning slots (10) for positioning the rotation of the resonant screw (3) are evenly arranged inside the limiting annular groove (9).

5. The communication filter with an adjustable resonance adjustment screw structure according to claim 1, characterized in that: The end of the resonance rod (2) is provided with a driving connection slot hole (11) with an inner hexagonal structure, and one end of the resonance screw rod (3) is movably inserted into the driving connection slot hole (11).

6. The communication filter with an adjustable resonance adjustment screw structure according to claim 1, characterized in that: The elastic telescopic member comprises a hollow cylinder (12) arranged at the bottom end of the shell (1), a reset elastic member (13) is arranged inside the hollow cylinder (12), and a telescopic sleeve rod (14) is sleeved on the outside of the hollow cylinder (12).

7. A communication filter with an adjustable resonance adjustment screw structure according to claim 6, characterized in that: The external top end of the telescopic sleeve rod (14) is provided with a positioning top block (15), and the end of the positioning top block (15) is provided with an active cavity (16) into which the resonance rod (2) is inserted for tightening.

8. The communication filter with an adjustable resonance adjustment screw structure according to claim 1, characterized in that: A screw seat (17) is provided at one end of the resonant screw (3) located inside the cavity (5), and an auxiliary screw groove (18) is provided at the center of the end of the screw seat (17).

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