Anti-interference filter

Abstract

The utility model discloses an anti-interference filter, which comprises a device main body, the top of the device main body is detachably connected with a cover plate, the top of the cover plate is fixedly connected with an anti-interference sleeve, the outer wall of the device main body is provided with a connecting port, and the outer wall of the device main body is provided with a protective connecting device. The protective connecting device comprises a fixing sleeve, and the fixing sleeve is fixedly connected to the outer wall of the device body through a bolt. The first protective sleeve is fixedly connected to the outer wall of the fixing sleeve. According to the anti-interference filter, through the use of the protective connecting device, after a cable is connected and fixed by the device, when the cable is touched by mistake and is stretched, a sliding ring drives a connecting pipe to compress a reset spring, so that the connecting pipe moves; therefore, the cable can have a certain telescopic capability when the cable between the device main body and the connecting pipe needs to be kept at a certain telescopic distance, and the situation that the cable is stretched and damaged is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an anti-interference filter. Background Art

[0002] A filter is a filter circuit composed of capacitors, inductors and resistors. The filter can effectively filter out a specific frequency point in the power line or frequencies other than the frequency point to obtain a power signal of a specific frequency, or eliminate a power signal after a specific frequency.

[0003] At present, in the prior art, a Chinese patent with announcement number CN216391779U discloses an anti-interference filter for communication, in which a top plate is provided inside a limiting device, transmission rods are fixedly connected to both sides of the top plate, a bottom plate is provided below the top plate, and limiting blocks are provided on both sides of the bottom plate. The inside of the limiting block is connected to the support rod by an interlocking manner, and the bottom of the support rod is connected to the extrusion wheel by an interlocking manner. A transmission wheel is provided at the bottom of the extrusion wheel, and the transmission wheel is connected to the bottom plate by an interlocking manner. The main benefit is that when connecting an external cable, the cover plate is closed, and the cable can be clamped and fixed by the components inside the limiting device to prevent the cable from falling off due to external interference factors. Not only is the connection between the protected cable and the device stable, but the service life of the cable is also improved. However, when the device is actually used, once the cable of the device is accidentally touched and dragged, although the clamping mechanism fixes one end of the cable to prevent the cable from falling off, the cable as a whole will be stretched and damaged. Utility Model Content

[0004] The main purpose of the utility model is to provide an anti-interference filter, which can solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the anti-interference filter proposed by the utility model comprises a device body, a cover plate is detachably connected to the top of the device body, an anti-interference sleeve is fixedly connected to the top of the cover plate, a connection port is opened on the outer wall of the device body, and a protective connection device is arranged on the outer wall of the device body, and the protective connection device comprises:

[0006] A fixing sleeve, wherein the fixing sleeve is fixedly connected to the outer wall of the device body by bolts;

[0007] A protective sleeve 1, wherein the protective sleeve 1 is fixedly connected to the outer wall of the fixed sleeve;

[0008] And a second protective sleeve, wherein the second protective sleeve is hinged on the outer wall of the first protective sleeve.

[0009] Preferably, the fixing sleeve, protective sleeve one and protective sleeve two are all spliced ​​in two halves, which facilitates the installation and connection of the cable.

[0010] Preferably, connecting blocks are fixedly connected to the outer walls of the protective sleeve 1 and the protective sleeve 2.

[0011] Preferably, a sleeve is fixedly connected to a side of the protective sleeve 2 away from the protective sleeve 1, and a sliding groove is provided on the inner wall of the sleeve.

[0012] Preferably, a sliding ring is slidably connected in the sliding groove, a connecting tube is fixedly connected to the outer wall of the sliding ring, and a reset spring is fixedly connected to the outer wall of the connecting tube. By using the sliding groove, the sliding ring can be limited. At the same time, by using the reset spring, when the sliding ring squeezes the reset spring for compression, the sliding ring can be reset under the action of the reset spring.

[0013] Preferably, one end of the return spring is fixedly connected to the outer wall of the sliding ring, and the other end of the return spring is fixedly connected to the inner wall of the sleeve.

[0014] Preferably, a bolt is threadedly connected to the outer wall of the connecting pipe, and a pressure ring is rotatably connected to the end of the bolt. By using the bolt and the pressure ring, the connected cables can be fixed to ensure the stability of the cable connection.

[0015] The utility model provides an anti-interference filter. It has the following beneficial effects:

[0016] (1) The anti-interference filter uses a protective connection device. After the device connects and fixes the cable, when the cable is accidentally touched and stretched, the sliding ring drives the connection tube to compress the reset spring, so that the connection tube moves, and then the cable between the device body and the connection tube needs to maintain a certain telescopic distance, so that the cable has a certain telescopic ability, prevents the cable from being stretched and damaged, and increases the service life of the cable.

[0017] (2) The anti-interference filter uses a protective connection device. After the device connects and fixes the cable, even if the connection angle of the cable changes, the protective cover 2 can rotate relative to the protective cover 1, thereby preventing the cable from bending and being damaged, thereby further improving the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the protective connection device of the utility model;

[0021] Figure 3 It is a partial structural schematic diagram of the protective connection device of the utility model;

[0022] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the utility model;

[0023] Figure 5 For this utility model Figure 4 Schematic diagram of the structure of A.

[0024] Description of Figure Numbers:

[0025] 1. Device body; 2. Cover plate; 3. Anti-interference sleeve; 4. Connecting port; 5. Protective connecting device; 51. Fixed sleeve; 52. Protective sleeve 1; 53. Protective sleeve 2; 54. Connecting block; 55. Sleeve; 56. Sliding ring; 57. Reset spring; 58. Connecting pipe; 581. Bolt; 582. Pressing ring.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1 The utility model proposes an anti-interference filter, including a device body 1, a cover plate 2 is detachably connected to the top of the device body 1, an anti-interference sleeve 3 is fixedly connected to the top of the cover plate 2, the anti-interference sleeve 3 is connected to the signal pole by a chimeric manner, and the use of the anti-interference sleeve 3 has the main benefit of providing protection for the signal pole to prevent the signal pole from being damaged and causing signal loss, thereby achieving an anti-interference effect. A connection port 4 is opened on the outer wall of the device body 1, and a protective connecting device 5 is arranged on the outer wall of the device body 1. By using the protective connecting device 5, the cables connected to the device body 1 can be protected.

[0029] See also Figure 2-Figure 5In the embodiment of the utility model, in order to protect the cable and prevent the cable from being stretched and damaged by accidental touch, specifically, the protective connection device 5 includes a fixed sleeve 51, the fixed sleeve 51 is fixedly connected to the outer wall of the device body 1 by bolts, a protective sleeve 1 52 is fixedly connected to the outer wall of the fixed sleeve 51, a protective sleeve 2 53 is hinged on the outer wall of the protective sleeve 1 52, the fixed sleeve 51, the protective sleeve 1 52 and the protective sleeve 2 53 are all spliced ​​in two halves, and the outer walls of the protective sleeve 1 52 and the protective sleeve 2 53 are fixedly connected with a connecting block 54. Through the use of the connecting block 54, the two groups of fixed sleeves 51, the protective sleeve 1 52 and the protective sleeve 2 53 can be spliced ​​and fixed, and the side of the protective sleeve 2 53 away from the protective sleeve 1 52 is fixedly connected with a sleeve 55, and a sliding groove is provided on the inner wall of the sleeve 55, and a sliding ring 56 is slidably connected in the sliding groove, and a connecting pipe 58 is fixedly connected to the outer wall of the sliding ring 56, and a bolt 581 is threadedly connected to the outer wall of the connecting pipe 58. The end of 581 is rotatably connected with a pressure ring 582. By rotating the bolt 581, the pressure ring 582 can be driven to fit tightly against the cable to fix the cable. A return spring 57 is fixedly connected to the outer wall of the connecting tube 58. One end of the return spring 57 is fixedly connected to the outer wall of the sliding ring 56, and the other end of the return spring 57 is fixedly connected to the inner wall of the sleeve 55. After the cable is connected and fixed to the device body 1, when the cable is accidentally touched and stretched, the sliding ring 56 drives the connecting tube 58 to compress the return spring 57, so that the connecting tube 58 moves, and then the cable between the device body 1 and the connecting tube 58 needs to be kept at a certain telescopic distance, so that the cable has a certain telescopic ability, prevents the cable from being stretched and damaged, and improves the service life of the cable. At the same time, when the angle of the cable changes during stretching, the protective sleeve 2 53 can rotate relative to the protective sleeve 1 52, thereby preventing the cable from bending and being damaged, further improving the service life of the cable.

[0030] When in use, first connect the cable to the device body 1, and place the cable in the fixing sleeve 51, the protective sleeve 1 52 and the protective sleeve 2 53, and pass through the connecting tube 58. At the same time, the cable has a stretching distance between the device body 1 and the connecting tube 58. By rotating the bolt 581, the pressure ring 582 can be driven to fit tightly against the cable to fix the cable. When the cable is accidentally touched and stretched, the sliding ring 56 drives the connecting tube 58 to compress the reset spring 57 to move the connecting tube 58. At the same time, when the angle of the cable changes during stretching, the protective sleeve 2 53 can rotate relative to the protective sleeve 1 52 to prevent the cable from bending and being damaged.

[0031] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An anti-interference filter, comprising a device body (1), characterized in that: The top of the device body (1) is detachably connected to a cover plate (2), the top of the cover plate (2) is fixedly connected to an anti-tampering sleeve (3), a connection port (4) is provided on the outer wall of the device body (1), and a protective connection device (5) is provided on the outer wall of the device body (1), and the protective connection device (5) comprises: A fixing sleeve (51), wherein the fixing sleeve (51) is fixedly connected to the outer wall of the device body (1) by means of bolts; A protective sleeve 1 (52), wherein the protective sleeve 1 (52) is fixedly connected to the outer wall of the fixed sleeve (51); and a second protective sleeve (53), wherein the second protective sleeve (53) is hinged on the outer wall of the first protective sleeve (52).

2. The anti-interference filter according to claim 1, characterized in that: The fixing sleeve (51), the first protective sleeve (52) and the second protective sleeve (53) are all of two halves spliced ​​together.

3. The anti-interference filter according to claim 1, characterized in that: A connecting block (54) is fixedly connected to the outer walls of the protective sleeve 1 (52) and the protective sleeve 2 (53).

4. The anti-interference filter according to claim 1, characterized in that: A sleeve (55) is fixedly connected to the side of the second protective sleeve (53) away from the first protective sleeve (52), and a sliding groove is provided on the inner wall of the sleeve (55).

5. The anti-interference filter according to claim 4, characterized in that: A sliding ring (56) is slidably connected in the sliding groove, a connecting pipe (58) is fixedly connected to the outer wall of the sliding ring (56), and a return spring (57) is fixedly connected to the outer wall of the connecting pipe (58).

6. The anti-interference filter according to claim 5, characterized in that: One end of the return spring (57) is fixedly connected to the outer wall of the sliding ring (56), and the other end of the return spring (57) is fixedly connected to the inner wall of the sleeve (55).

7. The anti-interference filter according to claim 5, characterized in that: A bolt (581) is threadedly connected to the outer wall of the connecting pipe (58), and a pressure ring (582) is rotatably connected to the end of the bolt (581).

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