External filter

Abstract

The utility model relates to the technical field of filters, and discloses an external filter, which comprises a PCB (Printed Circuit Board), a filtering electronic component, a connector, a base and an upper cover, a filtering electronic component consisting of a capacitor, an inductor and a resistor and a connector are welded on the mounting surface of the PCB, and the filtering electronic component and the PCB jointly form a PCB assembly; the connector comprises an input connector, a first output connector and a second output connector, the input connector is mounted on the upper side of the mounting surface of the PCB, and the first output connector and the second output connector are mounted on the lower side of the mounting surface of the PCB and are arranged up and down; the base and the upper cover are both metal shells, the PCB assembly is integrally fixed in the base, and one side of the mounting surface of the PCB is covered by the upper cover connected with the base. According to the utility model, while one-in (input) and two-out (output) multi-path wiring is realized, the small size of the filter is ensured, and the use space of the filter product is further saved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, and more specifically, to an external filter. Background Art

[0002] A filter is a device for filtering waves, generally having two ports - an input signal and an output signal. It can be said that it is an important electronic component. The filter transmits the power of the power supply to the device, greatly attenuates the EMI electromagnetic interference signal introduced through the power supply, and protects the device from it; at the same time, it can effectively control the EMI signal generated by the device itself and prevent it from entering the power grid, polluting the electromagnetic environment and harming other devices.

[0003] At present, most of the filters on the market are one-to-one input-output filters. If one tries to design a filter with one input (input) and multiple outputs (outputs) through wiring, using multiple single-input multi-output filters and combining their output results, the output result of the multi-output filter can be obtained. However, if a conventional filter structure form is used to design such a one-in-two-out filter (generally, components are directly welded to the connector with a metal shell), it will cause the filter to be too large in volume and occupy a large space, which does not conform to the current development direction of filters being light, thin, short, and small.

[0004] At the same time, the existing filters currently on the market also have problems such as being difficult to disassemble and repair, unable to determine whether the filter is working properly, and inconvenient installation.

[0005] Therefore, it is necessary to design a filter with a new structure to overcome the above technical problems. Summary of the Utility Model

[0006] In view of this, the utility model proposes an external filter, and its specific technical solution is as follows:

[0007] An external filter includes a PCB board, filter electronic components, connectors, a base, and an upper cover. The filter electronic components composed of capacitors, inductors, and resistors and the connectors are all soldered to the mounting surface of the PCB board. The filter electronic components and the PCB board together form a PCB board assembly. The connectors include an input connector, a first output connector, and a second output connector. The three connectors are respectively electrically connected to the filter electronic components on the PCB board. The input connector is installed on the upper side of the mounting surface of the PCB board and is electrically connected to the input terminal wiring on the upper side of the PCB board. The first output connector and the second output connector are installed on the lower side of the mounting surface of the PCB board and are arranged vertically. The first output connector and the second output connector are respectively electrically connected to the two-way output terminal wirings of the upper and lower structures on the lower side of the PCB board. The base and the upper cover are both metal shells. The base is located outside the opposite side of the mounting surface of the PCB board, and the entire PCB board assembly is fixed inside the base. One side of the mounting surface of the PCB board is covered by the upper cover connected to the base. The upper cover is provided with several openings for the wiring ports of the input connector, the first output connector, and the second output connector to respectively expose outside the upper cover.

[0008] Preferably, threaded holes are opened on the upper cover, and the banded screws for connecting external grounding elements are adaptively installed in the threaded holes.

[0009] Preferably, a card seat assembly that can be adaptively clamped with the guide rails of external devices is also installed on the outer side wall of the base.

[0010] Preferably, a light guide column indicator electrically connected to the filter circuit in the PCB board assembly is installed on the PCB board. The light guide column indicator extends away from the mounting surface of the PCB board and exposes outside the upper cover through the indicator hole on the upper cover.

[0011] Preferably, the upper cover is fixedly connected to the base through upper cover locking screws.

[0012] Preferably, the PCB board assembly is installed inside the base through connecting screws.

[0013] Preferably, the PCB board assembly is installed inside the base through spacer posts fixed by soldering or adhesion.

[0014] Compared with the prior art, the external filter of the present utility model has the following beneficial effects:

[0015] (1). While the external filter of the present utility model realizes multi-way wiring with one input (input) and two outputs (outputs), it also ensures that all corresponding filtering electronic components and connectors are soldered onto the PCB board to form electrical connections. Then, by designing the multi-way wiring at the output end as an up-and-down structure, it ultimately ensures that the filter still has a small volume, thereby saving the usage space of the filter product.

[0016] (2). Both the base and the upper cover in the present utility model are metal shells. When the product needs to be grounded, the grounding connection can be achieved by using the stud screw installed on the upper cover. The circular washer on the stud screw can firmly press the wire, avoiding the problem that the external grounding component cannot be well electrically connected to the metal shell of the filter.

[0017] (3). The upper cover and the base in the present utility model are connected by locking screws on the upper cover. The PCB board assembly can also be detachably installed inside the base, facilitating the disassembly, assembly, and maintenance of each mechanism in the external filter.

[0018] (4). The present utility model also adds a light guide column indicator in terms of structure and guides the light of the indicator to the product appearance, so that the working state of the filter can be monitored in real time, which is convenient for observation.

[0019] (5). A card seat assembly that can be adaptively clamped with the guide rail of an external device is also installed on the outer side wall of the base of the present utility model, which can facilitate the quick installation of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the external structure of the external filter of the present utility model Figure 1 .

[0022] Figure 2 It is a schematic diagram of the external structure of the external filter of the present utility model Figure 2 .

[0023] Figure 3 It is an exploded view of the structure of the external filter in Embodiment 1 of the present utility model.

[0024] Figure 4 It is an exploded view of the structure of the external filter in Embodiment 2 of the present utility model.

[0025] In the figure: 1 - PCB board assembly, 2 - input connector, 3 - first output connector, 4 - second output connector, 5 - base, 6 - upper cover, 7 - opening, 8 - wiring port, 9 - screw with washer, 10 - card holder assembly, 11 - light guide pillar indicator, 12 - indicator hole, 13 - upper cover locking screw, 14 - connecting screw, 15 - spacer post. Detailed implementation mode

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0029] Embodiment 1:

[0030] Refer to Figures 1-3 , an external filter in this embodiment includes a PCB board, filter electronic components, connectors, a base 5 and an upper cover 6.

[0031] The filter electronic components composed of capacitors, inductors and resistors and the connectors are all welded to the mounting surface of the PCB board. The filter electronic components and the PCB board together form the PCB board assembly 1.

[0032] The connectors include an input connector 2, a first output connector 3, and a second output connector 4. The three connectors are respectively electrically connected to the filter electronic components on the PCB board to form a filter assembly. These three connectors are the wiring platforms when the product of the present invention is used.

[0033] The input connector 2 is installed on the upper side of the PCB mounting surface and is electrically connected to the input terminal wiring on the upper side of the PCB; the first output connector 3 and the second output connector 4 are installed on the lower side of the PCB mounting surface and are arranged vertically. The first output connector 3 and the second output connector 4 are respectively and electrically connected to the two-way output terminal wirings of the upper and lower structures on the lower side of the PCB.

[0034] The base 5 and the upper cover 6 are both metal housings. The base 5 is used to fix the PCB board assembly 1, and the upper cover 6 is used to cover the PCB board assembly 1 and the three connectors, only exposing the outlets that need to be wired.

[0035] The base 5 is located on the outer side of the opposite surface of the PCB mounting surface, and the entire PCB board assembly 1 is fixed within the base 5. In this specific embodiment, the PCB board assembly 1 is installed within the base 5 through connecting screws 14 to facilitate the disassembly and assembly of the PCB board assembly 1.

[0036] One side of the PCB mounting surface is covered by the upper cover 6 connected to the base 5; several openings 7 are provided on the upper cover 6 for the wiring ports 8 of the input connector 2, the first output connector 3, and the second output connector 4 to be respectively exposed outside the upper cover 6.

[0037] Further, threaded holes are provided on the upper cover 6, and the grounding stud screw 9 is adaptively installed within the threaded holes. Since the external filter of the present utility model uses a metal shell, the product needs to be grounded, and the stud screw 9 can facilitate grounding.

[0038] Further, a card seat assembly 10 capable of being adaptively clamped with an external device guide rail is also installed on the outer side wall of the base 5, which can facilitate the quick installation of the external filter of the present utility model.

[0039] Further, a light guide column indicator 11 electrically connected to the filter circuit within the PCB board assembly 1 is installed on the PCB board. The light guide column indicator 11 extends towards the side away from the PCB mounting surface and is exposed outside the upper cover 6 through the indicator hole 12 on the upper cover 6. The light of the light guide column indicator 11 can be guided to the product appearance, so that the working state of the filter can be monitored in real time and it is convenient to observe.

[0040] Further, the upper cover 6 is fixedly connected to the base 5 through upper cover locking screws 13 to facilitate the disassembly and assembly between the upper cover 6 and the base 5.

[0041] At present, most filters on the market are one-to-one input and output, while the filter in the present invention realizes one-input (input) and two-output (output) multi-way wiring. At the same time, the existing filters on the market are all metal shells that wrap the components and are directly welded on the connector. If the one-input and two-output filter in the present invention adopts this method, it will lead to a large volume. Therefore, the present invention is improved by welding all the corresponding filtering electronic components and connectors on the PCB board to form an electrical connection, and then designing the multi-way wiring at the output end as an upper and lower structure, which ultimately ensures that the filter still has a small volume, thereby saving the use space of the filter product.

[0042] The installation process of the utility model is as follows: firstly, the three connectors are correspondingly welded to the PCB board assembly 1, and then the whole is installed into the base 5, and six connecting screws 14 are locked; the upper cover 6 is installed, and four upper cover locking screws 13 are locked to fix the upper cover 6 and the base 5; finally, the screws with mesons 9 are installed on the upper cover 6, and the card seat assembly 10 is installed on the base 5.

[0043] Embodiment 2:

[0044] The overall structure of an external filter in this embodiment is basically the same as that of the external filter in Embodiment 1, and also includes a PCB board, filter electronic components, a connector, a base 5 and an upper cover 6. The only difference is that, refer to Figure 4 In this embodiment, the PCB board assembly 1 is installed in the base 5 by means of spacer columns 15 fixed by welding or bonding.

[0045] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An external filter, characterized in that, It includes a PCB board, filtering electronic components, connectors, a base, and an upper cover; the filtering electronic components composed of capacitors, inductors, and resistors and the connectors are both soldered to the mounting surface of the PCB board, and the filtering electronic components and the PCB board together form a PCB board assembly; the connectors include an input connector, a first output connector, and a second output connector, and the three connectors are respectively electrically connected to the filtering electronic components on the PCB board; the input connector is installed on the upper side of the mounting surface of the PCB board and is electrically connected to the input terminal wiring on the upper side of the PCB board; the first output connector and the second output connector are installed on the lower side of the mounting surface of the PCB board and are arranged vertically, and the first output connector and the second output connector are respectively electrically connected to the two-way output terminal wirings of the upper and lower structures on the lower side of the PCB board; both the base and the upper cover are metal shells, the base is located outside the opposite side of the mounting surface of the PCB board, and the entire PCB board assembly is fixed inside the base; one side of the mounting surface of the PCB board is covered by the upper cover connected to the base; several openings are provided on the upper cover for the wiring ports of the input connector, the first output connector, and the second output connector to be respectively exposed outside the upper cover.

2. An external filter according to claim 1, characterized in that, Threaded holes are provided on the upper cover for the stud screws with washers for connecting external grounding components to be adaptively installed in the threaded holes.

3. An external filter according to claim 1, characterized in that A card seat assembly capable of being adaptively clamped with an external device rail is further installed on the outer side wall of the base.

4. An external filter according to claim 1, characterized in that, A light guide column indicator electrically connected to the filtering circuit in the PCB board assembly is installed on the PCB board, and the light guide column indicator extends away from the mounting surface of the PCB board and is exposed outside the upper cover through the indicator hole on the upper cover.

5. An external filter according to claim 1, wherein, The upper cover is fixedly connected to the base through upper cover locking screws.

6. An external filter according to claim 1, characterized in that, The PCB board assembly is installed inside the base through connecting screws.

7. An external filter according to claim 1, wherein The PCB board assembly is installed inside the base through spacer posts fixed by soldering or bonding.

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