Filter

Abstract

The utility model discloses a filter, and the filter comprises a plastic housing which comprises a hollow cavity, and the hollow cavity is provided with an opening; the electronic circuit board is placed into the hollow cavity from one side of the opening, and the electronic circuit board is connected with the plastic shell in a clamped mode; and the plastic shell cover is clamped with the plastic shell so as to seal the hollow cavity. The filter provided by the utility model is simple in structure and convenient to install, and is favorable for reducing the production cost and improving the production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, and particularly relates to a filter. Background Art

[0002] A filter can effectively filter out specific frequency points in the power line or frequencies outside that frequency point, obtaining a power signal with a specific frequency or eliminating a power signal after a specific frequency. Traditional filters are protected by a metal shell. Due to the limitations of sheet metal processing, multiple parts are usually required for assembly, resulting in a complex installation structure and inconvenient assembly. In addition, since the metal shell is a conductor, in order to ensure the electrical safety between the electronic components and the metal shell, insulating parts need to be added between the two or the gap between the two needs to be increased by increasing the shell size, resulting in a relatively large overall volume of the filter.

[0003] Therefore, it is necessary to provide a filter to simplify the assembly structure of the filter and improve the convenience of assembly. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a filter that uses a plastic housing and a plastic cover for snap-fit assembly, and the electronic circuit board is snap-fitted and installed with the plastic cover, with a simple structure and convenient installation.

[0005] To solve the above technical problem, an embodiment of the utility model provides a filter, including: a plastic housing, the plastic housing includes a hollow cavity, and the hollow cavity has an opening; an electronic circuit board, the electronic circuit board is placed into the hollow cavity from one side of the opening, and the electronic circuit board is snap-fitted with the plastic housing; a plastic cover, the plastic cover is snap-fitted with the plastic housing to close the hollow cavity.

[0006] Optionally, the hollow cavity includes a first inner wall and a second inner wall arranged opposite to each other, and connection components are symmetrically arranged on the first inner wall and the second inner wall, and the connection components are used to connect the plastic housing with the electronic circuit board and the plastic housing with the plastic cover.

[0007] Optionally, the electronic circuit board includes a bottom plate and electronic components installed on the bottom plate, and the bottom plate is snap-fitted with the plastic housing.

[0008] Optionally, the connection components include a plurality of first buckles, the plurality of first buckles are symmetrically arranged on the first inner wall and the second inner wall and are close to the opening side, and the first buckles are used to snap-fit the bottom plate and the plastic housing.

[0009] Optionally, the connecting component includes a plurality of second buckles, which are symmetrically arranged on the first inner wall and the second inner wall and are close to the opening side. The second buckles are used for clamping the plastic shell cover and the plastic shell.

[0010] Optionally, the distance between the first buckle and the edge of the opening is greater than the distance between the second buckle and the edge of the opening.

[0011] Optionally, the plastic shell includes a first end portion and a second end portion which are oppositely arranged. The first end portion and the second end portion are respectively located at two ends of the first inner wall and the second inner wall. A plurality of support members are respectively arranged on the first end portion and the second end portion, and terminal holes penetrating through the support members are arranged on each support member.

[0012] Optionally, a plurality of blade terminals are arranged on the bottom plate. When the electronic circuit board is placed into the hollow cavity, the blade terminals are inserted into the terminal holes.

[0013] Optionally, the vertical distance between the surface of the support member and the first buckle is the same as the thickness of the bottom plate.

[0014] Optionally, it further includes a first mounting hole and a second mounting hole, which are symmetrically arranged on the first end portion and the second end portion.

[0015] Compared with the prior art, the technical solution of the embodiment of the present utility model has the following beneficial effects:

[0016] The filter provided by this technical solution uses a plastic shell and a plastic shell cover, and the electronic circuit board is installed in the hollow cavity of the plastic shell. Due to the insulating property of the plastic material, there is no need to add additional insulating parts between the shell and the electronic circuit board to ensure electrical safety, which simplifies the overall structure of the filter; and both the electronic circuit board and the plastic shell cover are connected to the plastic shell by a buckling method, and the connection method is simple, convenient and fast to disassemble and assemble, which is beneficial to improving the production efficiency of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic exploded view of a filter in an embodiment of the present utility model;

[0018] Figure 2 is a schematic structural view of a plastic shell in an embodiment of the present utility model;

[0019] Figure 3 is Figure 2 a schematic side view of the first inner wall shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", etc. is based on the positional relationship shown in the drawings. It 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 therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" 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 direct connection, or an indirect connection through an intermediate medium, and can also be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] As described in the background art, the current filters have problems such as a relatively complex structure and inconvenient assembly. To solve the above problems, the housing and the housing cover of the embodiments of the present utility model are both made of plastic materials. The electronic circuit board is installed in the hollow cavity of the plastic housing, and the plastic housing cover and the plastic housing together form a closed cavity. Because of the insulating property of plastic, there is no need to additionally install insulating parts between the housing and the electronic circuit board, reducing the number of parts of the product, simplifying the structure of the filter, and at the same time reducing the cost; in addition, both the electronic circuit board and the plastic housing cover are connected to the plastic housing in a snap-fit manner, with a simple connection method, fast and convenient assembly, which is beneficial to improving production efficiency.

[0023] To make the above objects, features, and beneficial effects of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the drawings.

[0024] Figure 1 is a schematic diagram of the disassembled structure of a filter in an embodiment of the present utility model; Figure 2 is a schematic diagram of the structure of a plastic housing in an embodiment of the present utility model; Figure 3 is Figure 2 a schematic side view of the first inner wall shown.

[0025] With reference to Figure 1 and Figure 2, the filter 1 includes: a plastic housing 10, the plastic housing 10 includes a hollow cavity 11, and the hollow cavity 11 has an opening; an electronic circuit board 20, the electronic circuit board 20 is placed into the hollow cavity 11 from one side of the opening, and the electronic circuit board 20 is snap-connected to the plastic housing 10; a plastic housing cover 30, the plastic housing cover 30 is snap-connected to the plastic housing 10 to close the hollow cavity 11.

[0026] In this embodiment, the electronic circuit board 20 is placed into the hollow cavity 11 from one side of the opening and fixed in the hollow cavity 11 by a buckle. Then, the plastic housing cover 30 is snap-connected to the plastic housing 10 to close the opening. During the assembly process, the electronic circuit board 20 is assembled first, and then the plastic housing cover 30 is assembled. The assembly process is simple and the two assembly processes are in the same direction, greatly improving the assembly convenience, thereby being beneficial to improving the production efficiency of the filter 1.

[0027] In this embodiment, the electronic circuit board 20 includes a bottom plate 21 and electronic components 22 mounted on the bottom plate 21.

[0028] In this embodiment, the bottom plate 21 is snap-connected to the plastic housing 10.

[0029] The electronic components 22 include capacitors, inductors, resistors, etc. The types and arrangement manners of the electronic components 22 can be determined according to specific actual applications, and the present invention does not limit this.

[0030] Continue to refer to Figure 1 and Figure 2 , the hollow cavity 11 includes a first inner wall 110 and a second inner wall 120 arranged oppositely, the plastic housing 10 includes a first end 101 and a second end 102 arranged oppositely, and the first end 101 and the second end 102 are located at both ends of the first inner wall 110 and the second inner wall 120.

[0031] Continue to refer to Figure 2 , connection components are symmetrically arranged on the first inner wall 110 and the second inner wall 120, and the connection components are used to connect the plastic housing 10 with the electronic circuit board 20 and the plastic housing 10 with the plastic housing cover 30.

[0032] In this embodiment, the connection components include a plurality of first buckles 130 and a plurality of second buckles 140. The first buckles 130 are used to snap-connect the bottom plate 21 of the electronic circuit board 20 and the plastic housing 10, and the second buckles 140 are used to snap-connect the plastic housing cover 30 and the plastic housing 10.

[0033] In this embodiment, the opening has an edge, and the edge includes a first edge 121 and a second edge 122 which are oppositely arranged. The first edge 121 is parallel to the first inner wall 110 and the second inner wall 120, and the second edge 122 is perpendicular to the first inner wall 110 and the second inner wall 120.

[0034] In this embodiment, the number of the first buckles 130 is 4. Two first buckles 130 are arranged on each of the first inner wall 110 and the second inner wall 120, and the first buckles 130 are arranged at positions near both ends of the first edge 121.

[0035] In this embodiment, the number of the second buckles 140 is 2. One second buckle 140 is arranged on each of the first inner wall 110 and the second inner wall 120, and the second buckles 140 are arranged at positions near the middle of the first edge 121.

[0036] In other embodiments, other numbers of the first buckles 130 and the second buckles 140 can also be set. The number of the buckles can be determined according to the size of the filter 1. For example, if the structure of the filter 1 is larger, the areas of the bottom plate 21 of the electronic circuit board 20 and the plastic shell cover 30 are larger. In order to stably connect the bottom plate 21 and the plastic shell cover 30 to the plastic housing 10, more first buckles 130 and second buckles 140 can be set.

[0037] In other embodiments, the positions of the first buckles 130 and the second buckles 140 can also be changed according to the actual situation. For example, the first buckles 130 can be arranged at positions near the middle of the first edge 121, and the second buckles 140 can be arranged at positions near both ends of the first edge 121.

[0038] In other embodiments, the first buckles 130 and the second buckles 140 may not be arranged on the first inner wall 110 and the second inner wall 120, and the first buckles 130 and the second buckles 140 can also be arranged on the inner wall on one side of the second edge 122.

[0039] Reference Figure 3 , in this embodiment, the distance between the first buckle 130 and the edge of the opening is greater than the distance between the second buckle 140 and the edge of the opening. Specifically, the vertical distance h1 between the bottom of the first buckle 130 and the first edge 121 is greater than the vertical distance h2 between the bottom of the second buckle 140 and the first edge 121.

[0040] In this embodiment, the assembly sequence of the filter 1 is as follows: first, install the electronic circuit board 20 in the hollow cavity 11, and then install the plastic shell cover 30 to block the opening, forming a closed cavity. When installing the electronic circuit board 20, face the electronic components 22 towards the inside of the hollow cavity 11 and press the bottom plate 21 into the first buckle 130; then install the plastic shell cover 30, and directly press the plastic shell cover 30 into the second buckle 140. Therefore, compared with the first buckle 130, the distance between the second buckle 140 and the first edge 121 is closer to facilitate the clamping connection between the bottom plate 21 and the plastic shell cover 30 and the plastic housing 10.

[0041] Continue to refer to Figure 1 and Figure 2 , the plastic housing 10 further includes a plurality of support members 13, and the plurality of support members 13 are arranged on the first end 101 and the second end 102 of the plastic housing 10, and each support member 13 is provided with a terminal hole 14 penetrating through the support member 13.

[0042] In this embodiment, a plurality of insertion terminal 23 are provided on the bottom plate 21. When the electronic circuit board 20 is placed into the hollow cavity 11, the insertion terminal 23 is inserted into the terminal hole 14.

[0043] In this embodiment, the number of the terminal holes 14 corresponds to the number of the insertion terminal 23.

[0044] In this embodiment, 3 terminal holes 14 are provided on the first end 101, and 2 terminal holes 14 are provided on the second end 202; in other embodiments, the number and positions of the support members 13 and the terminal holes 14 can be set according to the actual structure of the filter.

[0045] In this embodiment, when the electronic circuit board 20 is placed into the hollow cavity 11, the surface of the support member 13 close to the opening side can support the bottom plate 21, and the support member 13 and the first buckle 130 cooperate with each other to fix the position of the bottom plate 21, thereby fixing the position of the electronic circuit board 20 in the hollow cavity 11. There is no need to use the method of pouring and curing the potting agent to fix the electronic circuit board, the manufacturing process is simple, and the production cycle is greatly reduced.

[0046] Refer to Figure 3 , in this embodiment, the vertical distance h3 between the surface of the support member 13 and the first buckle 130 is the same as the thickness of the bottom plate 21. Specifically, the vertical distance h3 between the surface of the support member 13 close to the opening side and the bottom of the first buckle 130 is the same as the thickness of the bottom plate 21 to ensure that the electronic circuit board 20 will not move in the hollow cavity 11.

[0047] In other embodiments, h3 may also be slightly greater than the thickness of the bottom plate 21.

[0048] Continuing to refer to Figure 1 and Figure 2 , a first mounting hole 15 and a second mounting hole 16 are further provided on the plastic housing 10, and the first mounting hole 15 and the second mounting hole 16 are symmetrically arranged on the first end 101 and the second end 102.

[0049] In this embodiment, the first mounting hole 15 and the second mounting hole 16 are respectively located at the middle positions of the first end 101 and the second end 102; in other embodiments, the first mounting hole 15 and the second mounting hole 16 may also be arranged at other positions according to actual situations.

[0050] The first mounting hole 15 and the second mounting hole 16 are used to mount the filter 1 in the use environment.

[0051] The filter provided by the present utility model uses a housing and a cover made of plastic material, which can ensure the insulation between the filter and electronic components, and there is no need to additionally increase insulation parts, which is beneficial to simplifying the structure and reducing costs; in addition, the electronic circuit board is connected to the plastic housing by snap connection, and the plastic cover is also connected to the plastic housing by snap connection. The installation process is convenient and fast, which is beneficial to improving production efficiency.

[0052] Although the present utility model is disclosed as above, the present utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims.

Claims

1. A filter, characterized in that, Comprising: A plastic housing, the plastic housing including a hollow cavity having an opening; An electronic circuit board, the electronic circuit board including a bottom plate and electronic components mounted on the bottom plate, the electronic circuit board being placed into the hollow cavity from the side of the opening, and the bottom plate of the electronic circuit board being snap-connected to the plastic housing; A plastic shell cover, the plastic shell cover being snap-connected to the plastic housing to enclose the hollow cavity A plurality of first snap-fasteners and a plurality of second snap-fasteners are provided in the hollow cavity, the first snap-fasteners being used for snap-connecting the bottom plate of the electronic circuit board to the plastic housing, the second snap-fasteners being used for snap-connecting the plastic shell cover to the plastic housing, and the distance between the first snap-fastener and the edge of the opening being greater than the distance between the second snap-fastener and the edge of the opening.

2. The filter according to claim 1, characterized in that, The hollow cavity includes a first inner wall and a second inner wall which are oppositely arranged, and connecting components are symmetrically arranged on the first inner wall and the second inner wall, the connecting components being used for connecting the plastic housing to the electronic circuit board and the plastic housing to the plastic shell cover.

3. The filter according to claim 2, characterized in that, The connecting component includes a plurality of first snap-fasteners, the plurality of first snap-fasteners being symmetrically arranged on the first inner wall and the second inner wall and close to the side of the opening, the first snap-fasteners being used for snap-connecting the bottom plate and the plastic housing.

4. The filter according to claim 3, wherein The connecting component includes a plurality of second snap-fasteners, the plurality of second snap-fasteners being symmetrically arranged on the first inner wall and the second inner wall and close to the side of the opening, the second snap-fasteners being used for snap-connecting the plastic shell cover and the plastic housing.

5. The filter according to claim 3, wherein The plastic housing includes a first end portion and a second end portion which are oppositely arranged, the first end portion and the second end portion are respectively located at two ends of the first inner wall and the second inner wall, and a plurality of support members are respectively arranged on the first end portion and the second end portion, and terminal holes penetrating through the support members are arranged on each support member.

6. The filter according to claim 5, characterized in that A plurality of insertion terminal pins are arranged on the bottom plate, and when the electronic circuit board is placed into the hollow cavity, the insertion terminal pins are inserted into the terminal holes.

7. The filter according to claim 5, wherein The vertical distance between the surface of the support member and the first snap-fastener is consistent with the thickness of the bottom plate.

8. The filter according to claim 5, characterized in that, It further includes a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole being symmetrically arranged on the first end portion and the second end portion.

Images