Filter shell and filter

Abstract

The utility model discloses a filter shell and a filter, relates to the technical field of filters, and aims to solve the problem that a filter shell in the prior art cannot give consideration to sealing performance and light weight at the same time. The filter shell comprises a shell body and pins, the shell body is provided with an accommodating cavity, and a mounting hole communicated with the accommodating cavity is formed in the shell body; the pins are arranged in the mounting holes in a penetrating manner, one ends of the pins are positioned in the accommodating cavity, and the other ends of the pins are positioned outside the shell; a lantern ring and an insulating ring are arranged on the pin, and the lantern ring is sleeved on the outer surface of the insulating ring; wherein the shell and the lantern ring are configured in a manner that the shell is made of metal, the lantern ring is made of metal, the density of the shell is smaller than that of the lantern ring, the melting point of the lantern ring is higher than that of the shell, and the melting point of the shell is higher than that of the insulating ring.

Description

Technical Field

[0001] The present application relates to the technical field of filters, and in particular to a filter housing and a filter. Background Art

[0002] A filter is a device used to eliminate interfering noise signals. It is a circuit component used to effectively filter out frequencies within a specific frequency band or outside of that band. Typically, a filter consists of a housing and a circuit board housed within it. The housing has mounting holes, through which pins on the circuit board extend out of the housing for electrical connection to external devices. Insulators connect the pins to the mounting holes, providing both connection and insulation between the pins and the housing.

[0003] To improve the sealing performance of filter housings in related art, insulators are typically made of glass, with the mounting holes sealed by sintering and filling. However, due to the high melting point of glass, if the housing is made of an alloy or metal with a lower melting point, it must be made of a material with a higher melting point, such as steel. This results in a heavier housing. Utility Model Content

[0004] The embodiments of the present application provide a filter housing and a filter, which are used to solve the problem in the related art that the filter housing cannot achieve both sealing and light weight.

[0005] In a first aspect, an embodiment of the present application provides a filter housing, comprising a shell and a pin, the shell having a receiving cavity, and the shell being provided with a mounting hole connected to the receiving cavity; the pin is passed through the mounting hole, one end of the pin is located in the receiving cavity, and the other end of the pin is located outside the shell; a ring and an insulating ring are provided on the pin, and the ring is provided on the outer surface of the insulating ring; wherein the shell and the ring are configured such that the shell is made of metal, the ring is made of metal, the density of the shell is lower than that of the ring, the melting point of the ring is higher than that of the shell, and the melting point of the shell is higher than that of the insulating ring.

[0006] In some embodiments, the collar is a steel ring.

[0007] In some embodiments, the shell includes: a shell body and an upper cover, the shell body has a groove, and the mounting hole is opened on the bottom wall of the shell body; the upper cover is arranged at the groove so that the groove forms the accommodating cavity; the shell body and the upper cover are configured as follows: the shell body is made of aluminum alloy, the upper cover is made of iron-nickel alloy, and the upper cover and the groove are welded together by a parallel seam welding process.

[0008] In some embodiments, the groove is snap-fitted to the upper cover.

[0009] In some embodiments, the upper cover is plate-shaped, and the upper cover includes a cover center area and a cover edge area located outside the center area; the thickness of the cover edge area is less than the thickness of the cover center area, so that the cover edge area forms a first clamping portion; the shell body includes the bottom wall and a side wall arranged on the bottom wall, and the side of the side wall away from the bottom wall forms a second clamping portion, and the second clamping portion is clamped with the first clamping portion; the side wall stops at the cover edge area.

[0010] In some embodiments, the bottom wall includes a first area and a second area, the thickness of the first area is greater than the thickness of the second area, and the mounting hole is opened in the first area.

[0011] In some embodiments, the number of the first regions is 2, the number of the second region is 1, and the second region is connected between two first regions in a direction perpendicular to the thickness direction of the bottom wall.

[0012] In some embodiments, the number of the first zone is 1, the number of the second zone is 1, the outline of the first zone is annular, and the second zone is connected to the central hole of the first zone.

[0013] In some embodiments, a grounding pin is further provided on the shell, and the grounding pin is welded to the bottom wall of the shell.

[0014] In a second aspect, an embodiment of the present application provides a filter, comprising the filter housing as described in the first aspect.

[0015] When the structure of the shell is the same as that of the filter shell in the related art, and the material of the ring is the same as that of the filter shell in the related art, the filter shell provided in the embodiment of the present application has a shell density lower than that of the ring, that is, the density of the material used for the shell of the present application is lower than the density of the material used for the shell in the related art. When the structure is the same as that of the filter shell in the related art, the weight of the shell is indirectly reduced, thereby achieving lightweighting of the filter shell. In addition, a ring is provided between the pin provided with an insulating ring and the hole wall of the mounting hole. The melting point of the ring is higher than the melting point of the shell, and the melting point of the shell is higher than the melting point of the insulating ring. When the mounting hole is sealed by heating and sintering, the insulating ring has the lowest melting point and melts first. In this way, the ring can play a good barrier role, reducing the risk of melting at the mounting hole of the shell due to excessive temperature. At the same time, during the welding process of the ring and the mounting hole, it can also play a barrier role, thereby improving the sealing and reliability of the filter shell, thereby achieving the purpose of taking into account lightweighting, sealing and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic structural diagram of a filter housing in some embodiments of the present application;

[0018] Figure 2 for Figure 1 An exploded view of the filter housing in Figure 1.

[0019] Figure 3 for Figure 1 Schematic diagram of part of the structure of the filter housing;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the filter housing from another perspective;

[0021] Figure 5 for Figure 4 AA section view in;

[0022] Figure 6 for Figure 5 The enlarged view of point I in the middle;

[0023] Figure 7 for Figure 4 BB cross-section diagram in.

[0024] Description of reference numerals:

[0025] 1. Accommodating cavity; 2. Groove; 3. Second clamping portion; 4. First clamping portion;

[0026] 10. Housing: 101, mounting hole; 11, housing body; 111, bottom wall; 1111, first area; 1112, second area; 112, side wall; 12, upper cover;

[0027] 31. Pin; 32. Insulation ring; 33. Sleeve ring;

[0028] 40. Ground pin. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0033] A filter is a device used to eliminate interfering noise signals. It is a circuit component used to effectively filter out frequencies within a specific frequency band or outside of that band. Typically, a filter consists of a housing and a circuit board housed within it. The housing has mounting holes, through which pins on the circuit board extend out of the housing for electrical connection to external devices. Insulators connect the pins to the mounting holes, providing both connection and insulation between the pins and the housing.

[0034] To improve the sealing performance of filter housings in related art, insulators are typically made of glass, with the mounting holes sealed by sintering and filling. However, due to the high melting point of glass, if the housing is made of an alloy or metal with a lower melting point, it must be made of a material with a higher melting point, such as steel. This results in a heavier housing.

[0035] In order to solve the above problem, an embodiment of the present application provides a filter, which includes a filter housing and a filter circuit board arranged in the filter housing.

[0036] like Figure 1 and Figure 2 As shown, the filter housing includes a shell 10 and a pin 31. The shell 10 has a accommodating cavity 1, and a mounting hole 101 connected to the accommodating cavity 1 is opened on the shell 10; the pin 31 is inserted into the mounting hole 101, one end of the pin 31 is located in the accommodating cavity 1, and the other end of the pin 31 is located outside the shell 10; a ring 33 and an insulating ring 32 are provided on the pin 31, and the ring 33 is sleeved on the outer surface of the insulating ring 32; wherein, the shell 10 and the ring 33 are configured as follows: the shell 10 is made of metal, the ring 33 is made of metal, the density of the shell 10 is lower than the density of the ring 33, the melting point of the ring 33 is higher than the melting point of the shell 10, and the melting point of the shell 10 is higher than the melting point of the insulating ring 32.

[0037] In the case where the structure of the housing 10 is the same as that of the filter housing in the related art, and the material of the collar 33 is the same as that of the filter housing in the related art, the filter housing provided by the embodiment of the present application has a density of the housing 10 that is smaller than that of the collar 33. That is, the density of the material used in the housing 10 of the present application is smaller than that of the material used in the housing 10 in the related art. In the case where the structure of the filter housing is the same as that in the related art, the weight of the housing 10 is indirectly reduced, thereby achieving lightweighting of the filter housing. In addition, the pin 31 provided with the insulating ring 32 and the mounting hole A ring 33 is provided between the hole walls of 101, and the melting point of the ring 33 is higher than the melting point of the shell 10, and the melting point of the shell 10 is higher than the melting point of the insulating ring 32. When the mounting hole 101 is sealed by heating and sintering, the insulating ring 32 has the lowest melting point and melts first. In this way, the ring 33 can play a good barrier role, reducing the risk of melting at the mounting hole 101 of the shell 10 due to excessive temperature; at the same time, during the welding process of the ring 33 and the mounting hole 101, it can also play a barrier role, thereby improving the sealing and reliability of the filter housing, thereby achieving the purpose of taking into account lightweight, sealing and reliability.

[0038] It should be noted that the collar 33 of the present application is made of the same steel material as the housing 10 in the related art, for example, 10# steel. Therefore, the collar 33 can also be referred to as a steel ring. The insulating ring 32 can be made of glass, and the insulating ring 32 can be referred to as a glass insulator. The above-mentioned metal materials include conductive materials such as steel, copper, and aluminum, as well as conductive alloy materials such as aluminum alloy.

[0039] like Figure 2As shown, the shell 10 includes: a shell body 11 and an upper cover 12, the shell body 11 has a groove 2, and a mounting hole 101 is opened on the bottom wall 111 of the shell body 11; the upper cover 12 is covered at the groove 2 so that the groove 2 forms an accommodating cavity 1; the shell body 11 and the upper cover 12 are configured as follows: the shell body 11 is made of aluminum alloy, and the upper cover 12 is made of iron-nickel alloy, also known as Kovar, and the upper cover 12 is welded to the groove 2 by a parallel seam welding process.

[0040] Compared with the shell 10 made of steel in the related art, when the structure and size of the shell 10 are the same as those of the shell 10 in the related art, the shell body 11 is made of aluminum alloy and the upper cover 12 is made of iron-nickel alloy, which not only indirectly reduces the weight of the shell 10, but also enables the shell body 11 and the upper cover 12 to be welded together through a parallel welding process. In this way, not only the shell body 11 and the upper cover 12 are sealed, but also the connection is relatively flat and beautiful, achieving the purpose of improving both sealing and aesthetics.

[0041] When the material of the housing 10 is designed using the above-mentioned materials, the pins 31 of the present application may be made of Kovar-copper.

[0042] Of course, the shell body 11 and the upper cover 12 can also be made of aluminum alloy or iron-nickel alloy, or other metals or alloys with a density lower than steel, which are not specifically limited here.

[0043] like Figure 5 As shown, in some embodiments, the groove 2 is snap-fitted to the upper cover 12 .

[0044] The shell body 11 and the upper cover 12 are snap-fitted together, which improves the assembly positioning accuracy of the shell body 11 and the upper cover 12 before welding, thereby facilitating improved reliability and sealing of the housing 10 .

[0045] like Figure 5 As shown, in some embodiments, the upper cover 12 is plate-shaped, and the upper cover 12 includes a cover center area and a cover edge area located outside the center area, the thickness of the cover edge area is less than the thickness of the cover center area, the cover edge area and the part transitioning to the cover center area form a first clamping portion 4; the shell body 11 includes a bottom wall 111 and a side wall 112 arranged on the bottom wall 111, and the side of the side wall 112 away from the bottom wall 111 forms a second clamping portion 3; the side wall 112 stops at the cover edge area, and the side wall 112 stops at the cover edge area.

[0046] Through the above arrangement, on the basis of the firm connection between the shell body 11 and the upper cover 12 , the structure of the housing 10 is simplified, thereby facilitating a reduction in the processing cost of the housing 10 .

[0047] The above-mentioned groove 2 and the second clamping portion 3 can be of the same structure, or the groove 2 can include the second clamping portion 3; the upper cover 12 and the first clamping portion 4 can be of the same structure, or the upper cover 12 can include the first clamping portion 4, the first clamping portion 4 and the second clamping portion 3 are clamped, and the side wall 112 stops at the edge area of ​​the cover to clamp the groove 2 and the upper cover 12.

[0048] like Figure 3 and Figure 5 As shown, in some embodiments, the bottom wall 111 includes a first area 1111 and a second area 1112 . The thickness of the first area 1111 is greater than that of the second area 1112 . The first area 1111 is provided with a mounting hole 101 .

[0049] By arranging the mounting hole 101 in the first region 1111 having a relatively thick thickness, the pin 31 can be reliably connected to the bottom wall 111 , thereby facilitating improved reliability of the filter circuit board.

[0050] like Figure 7 As shown, in some embodiments, the number of the first regions 1111 is 2, the number of the second region 1112 is 1, and in a direction perpendicular to the thickness direction of the bottom wall 111 , the second region 1112 is connected between the two first regions 1111 .

[0051] Through the above arrangement, there is an entire space between the two first areas 1111 as the second area 1112. In this way, the space of the accommodating cavity 1 in the housing 10 can be increased on the basis of reliable connection with the pin 31, which is beneficial to the arrangement of the filter circuit board.

[0052] like Figure 7 As shown, there are four pins 31 , which are disposed at four corresponding corners of the bottom wall 111 , and each first area 1111 is provided with two mounting holes 101 .

[0053] Of course, the number of first regions 1111 can be one, in addition to two. That is, the first region 1111 has a circular outline, and the second region 1112 is connected to the central hole of the first region 1111. Of course, when the area of ​​the bottom wall 111 is large, multiple independent or partially independent first regions 1111 can be provided at the corresponding positions of the bottom wall 111 where the pins 31 are provided, to enhance the connection reliability of the pins 31 and the ground pin 40 with the bottom wall 111. The specific number of first regions 1111 needs to be determined in combination with the area of ​​the bottom wall 111 and the number and positions of the pins 31, and is not specifically limited here.

[0054] The housing 10 is further provided with a grounding pin 40 , which is welded to the bottom wall 111 of the housing 10 .

[0055] Typically, one end of the grounding pin 40 is electrically connected to the filter circuit board, and the other end is connected to the ground. This achieves the purpose of grounding the filter circuit board. The grounding pin 40 is welded to the bottom wall 111 of the housing 10, so that the connection between the grounding pin 40 and the bottom wall 111 is sealed. This, on the basis of grounding the filter circuit board, achieves the sealing of the filter housing. When the filter housing is used in a power supply EMI filter, the filter housing has a better shielding effect.

[0056] like Figure 7 As shown, a grounding pin 40 is provided on the first area 1111 of the bottom wall 111 of the filter. By providing the grounding pin 40 in the first area 1111, the connection reliability between the grounding pin 40 and the bottom wall 111 of the filter is improved.

[0057] To solve the above problem, the present invention also provides a method for preparing a filter housing, including:

[0058] The insulating ring and the sleeve are placed on the preset position of the pin, and the insulating ring between the pin and the sleeve is melted by heating, so that the pin, the insulating ring and the sleeve are fixed in pairs to form a pin assembly;

[0059] The pin assembly is extended into the accommodating cavity through the mounting hole on the shell until the collar is located in the mounting hole; the pin assembly is fixed at the mounting hole by welding between the collar and the mounting hole.

[0060] It should be noted that when the pin components are assembled and fixed, they usually need to be completed in a corresponding fixture.

[0061] The above preparation method is used to prepare the filter housing as in the above embodiment. Therefore, the beneficial effects achieved by the preparation method of the present application are the same as those achieved by the filter housing in the above embodiment, and will not be repeated here.

[0062] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A filter housing, characterized in that: include: A housing (10) having an accommodating cavity (1), wherein the housing (10) is provided with a mounting hole (101) communicating with the accommodating cavity (1); A pin (31) is inserted into the mounting hole (101), one end of the pin (31) is located in the accommodating cavity (1), and the other end of the pin is outside the housing; a collar (33) and an insulating ring (32) are provided on the pin (31), and the collar (33) is sleeved on the outer surface of the insulating ring (32); The shell (10) is made of metal, the collar (33) is made of metal, the density of the shell (10) is lower than the density of the collar (33), the melting point of the collar (33) is higher than the melting point of the shell (10), and the melting point of the shell (10) is higher than the melting point of the insulating ring (32).

2. The filter housing according to claim 1, wherein The collar (33) is a steel ring.

3. The filter housing according to claim 2, wherein: The housing (10) comprises: The shell body (11) has a groove (2), and the bottom wall (111) of the shell body (11) is provided with the mounting hole (101); An upper cover (12) is arranged on the groove (2) so that the groove (2) forms the accommodating cavity (1); The shell body (11) is made of aluminum alloy, the upper cover (12) is made of iron-nickel alloy, and the upper cover (12) and the groove (2) are welded together by a parallel seam welding process.

4. The filter housing according to claim 3, wherein The groove (2) is snap-connected with the upper cover (12).

5. The filter housing according to claim 4, characterized in that The upper cover (12) is plate-shaped and comprises a cover center area and a cover edge area located outside the center area; the thickness of the cover edge area is smaller than the thickness of the cover center area, so that the cover edge area forms a first clamping portion (4); The shell body (11) comprises the bottom wall (111) and a side wall (112) arranged on the bottom wall (111); a second clamping portion (3) is formed on a side of the side wall (112) away from the bottom wall (111); the second clamping portion (3) is clamped with the first clamping portion (4), and the side wall (112) is stopped at the edge area of ​​the cover.

6. The filter housing according to any one of claims 3 to 5, characterized in that: The bottom wall (111) comprises a first area (1111) and a second area (1112); the thickness of the first area (1111) is greater than the thickness of the second area (1112); and the mounting hole (101) is provided on the first area (1111).

7. The filter housing according to claim 6, wherein: The number of the first areas (1111) is two, the number of the second area (1112) is one, and in a direction perpendicular to the thickness direction of the bottom wall (111), the second area (1112) is connected between two of the first areas (1111).

8. The filter housing according to claim 6, wherein: The number of the first area (1111) is one, the number of the second area (1112) is one, the outline of the first area (1111) is annular, and the second area (1112) is connected to the central hole of the first area (1111).

9. The filter housing according to any one of claims 1 to 5, characterized in that: A grounding pin (40) is also provided on the housing (10), and the grounding pin (40) is welded to the bottom wall (111) of the housing (10).

10. A filter, characterized in that: The filter housing comprises the filter housing according to any one of claims 1 to 8.

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