Ground capacitor with fixed terminal pin pitch

Abstract

The utility model relates to a fixed terminal pin ground capacitor, comprising a housing with an opening and a capacitor core, the top of the capacitor core is provided with a PCB fixing plate, the PCB fixing plate is fixedly connected with at least two terminal pins arranged at intervals, and more than two terminal pins pass through the opening and extend out of the housing; more than two connecting wires corresponding to the number of the terminal pins are arranged between the PCB fixing plate and the capacitor core, one end of each connecting wire is welded with a metal spraying surface of the capacitor core, the other end of each connecting wire is welded with one of the terminal pins, the capacitor core and the PCB fixing plate are packaged in an inner cavity of the shell through epoxy resin filler, and the capacitor core is connected with the PCB fixing plate. According to the capacitor, the terminal pins are fixedly connected through the PCB fixing plate, the pin pitch between the terminal pins can be fixed, and the customization requirements of customers can be met.

Description

Technical Field

[0001] The utility model relates to the field of capacitors, in particular to a capacitor with a fixed terminal foot distance to the ground. Background Art

[0002] At present, the structure of capacitors mainly includes a shell and a capacitor core built into the inner cavity of the shell, and the capacitor core is connected to terminal pins, which extend out of the shell through the opening of the shell, and finally the capacitor core is potted with encapsulation materials such as epoxy resin to fix the position of the terminal pins. However, during the assembly or potting process, the pitch between adjacent terminal pins will be affected, and since the terminal pins are mainly connected by wiring, the deviation of the pitch has little effect on the installation. However, when customers have special needs and need to customize capacitors with fixed pitches, the capacitors with the above structure are difficult to meet the customer's customization needs. Therefore, the applicant improves and perfects the existing technology and provides a new capacitor solution for consumers to choose and use. Summary of the invention

[0003] The utility model aims to provide a capacitor with fixed terminal feet to ground which has simple and reasonable structure, convenient installation and stable structure.

[0004] A capacitor with fixed terminal pins to ground comprises a shell with an opening and a capacitor core, wherein a PCB fixing plate is arranged on the top of the capacitor core, and at least two terminal pins arranged at intervals are fixedly connected to the PCB fixing plate, and more than two terminal pins extend out of the shell through the opening; more than two connecting wires are arranged between the PCB fixing plate and the capacitor core corresponding to the number of terminal pins, one end of each connecting wire is welded to the gold-sprayed surface of the capacitor core, and the other end is welded to one of the terminal pins, and the capacitor core and the PCB fixing plate are encapsulated in the inner cavity of the shell by epoxy resin filler.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, two connecting seams arranged on the left and right are opened on the PCB fixing plate, and the two terminal pins are respectively inserted into the two connecting seams, and the two terminal pins are arranged in the middle position of the opening and are on the same straight line.

[0007] As a further solution, the PCB fixing plate has a "Z"-shaped structure, and a group of connecting seam groups are arranged on the left and right sides thereof, each group of connecting seam groups includes two connecting seams, the two connecting seams in the same group are parallel to each other and arranged front to back, and one of the connecting seams is on the same straight line as a connecting seam of an adjacent group, and the other connecting seam is staggered front to back with another connecting seam of the adjacent group.

[0008] As a further solution, the terminal pin has an "L"-shaped structure, which includes a longitudinal lead-out section and a transverse welding section. The lead-out section is connected in series in the connecting seam, and the welding section is placed under the PCB fixing plate, and its end extends out of the PCB fixing plate and is welded to the other end of the connecting wire.

[0009] As a further solution, an interference fit is formed between the lead-out section and the connecting seam, or a limit buckle structure is provided between the lead-out section and the PCB fixing plate.

[0010] As a further solution, the limiting buckle structure includes a recess and a protrusion, one of the recess and the protrusion is arranged on the narrow side of the lead-out section, and the other of the recess and the protrusion is arranged on the seam wall of the connecting seam. The recess and the protrusion are buckled together to achieve assembly limiting of the terminal pins by the PCB fixing plate.

[0011] As a further solution, the shell is a rectangular parallelepiped, including two long side walls and two short side walls; the capacitor core is a flat cylindrical structure, with two parallel flat surfaces on opposite sides, the two flat surfaces face the two long side walls respectively, and the flat surfaces are against or close to the long side walls.

[0012] As a further solution, the shape of the PCB fixing plate is the same as the shape of the inner cavity of the shell, but at least the side edges of the PCB fixing plate abut against the left and right walls of the inner cavity of the shell, and the ends of the PCB fixing plate abut against the front and rear walls of the inner cavity of the shell, so that the capacitor core is positioned and embedded in the inner cavity of the shell through the PCB fixing plate.

[0013] As a further solution, the capacitor core is made by winding two layers of film, the two layers of film including an outer film and an inner film;

[0014] The inner surface of the inner film is symmetrically provided with two inner metal coatings, and the two inner metal coatings are separated from each other; the inner surface of the outer film is provided with an outer metal coating, and the outer metal coating is connected in series with the left and right inner metal coatings.

[0015] As a further solution, the length of the capacitor core is W1, and 32mm±2mm≤W1≤52mm±2mm;

[0016] The thickness of the capacitor core is T1, and 8.2mm±2mm≤T1≤31.5mm±2mm;

[0017] The width of the capacitor core is H1, and 16mm±2mm≤H1≤44.1mm±2mm.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model discloses a capacitor with fixed terminal pin distance. The capacitor has terminal pins connected by a PCB fixing plate, and the pitch between the terminal pins can be fixed to meet the customization needs of customers. The terminal pins are led out from the middle position of an opening, and the creepage distance between the terminal pins and a shell can be ensured, so that the size of the shell is more closely fitted to the shape of the capacitor core, so that the volume of the capacitor is minimized and the structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the decomposed structure of the capacitor in the utility model.

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the capacitor in the utility model.

[0022] Figure 3 It is a schematic diagram of the structure of the PCB fixing plate in the utility model.

[0023] Figure 4 It is a schematic diagram of the top view structure of the capacitor in the utility model.

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the terminal pins and the PCB fixing plate in the utility model.

[0025] Figure 6 It is a schematic diagram of the limit buckle structure of the terminal pin and the PCB fixing plate in the utility model.

[0026] Figure 7 It is a schematic diagram of the cross-section connection between the outer film and the inner film in the utility model.

[0027] Figure 8 It is a structural schematic diagram of a first embodiment of a PCB fixing plate in the utility model. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figures 1 to 8As shown, a capacitor with a fixed terminal pitch comprises a housing 1 with an opening and a capacitor core 2, a PCB fixing plate 3 is arranged on the top of the capacitor core 2, at least two spaced terminal pins 4 are fixedly connected to the PCB fixing plate 3, and more than two terminal pins 4 extend out of the housing 1 through the opening; more than two connecting wires 5 are arranged between the PCB fixing plate 3 and the capacitor core 2 corresponding to the number of terminal pins 4, one end of each connecting wire 5 is welded to the gold-sprayed surface 201 of the capacitor core 2, and the other end is welded to one of the terminal pins 4, and the capacitor core 2 and the PCB fixing plate 3 are encapsulated in the inner cavity of the housing 1 by epoxy resin filler 6; this capacitor is fixedly connected to the terminal pins 4 by the PCB fixing plate 3, and the pitch between the terminal pins 4 can be fixed, which can meet the customization needs of customers.

[0030] The PCB fixing plate 3 is provided with two connecting seams 301 arranged on the left and right, and the two terminal pins 4 are respectively connected in the two connecting seams 301, and the two terminal pins 4 are arranged in the middle position of the opening and on the same straight line; the terminal pins 4 are led out from the middle position of the opening, which can ensure the creepage distance between the terminal pins 4 and the shell 1, make the size of the shell 1 more fit the shape of the capacitor core, make the capacitor volume as small as possible, and make the structure more compact.

[0031] The PCB fixing plate 3 is in a "Z"-shaped structure, and a group of connecting seam groups are arranged on the left and right sides thereof, each connecting seam group includes two connecting seams 301, and the two connecting seams 301 in the same group are parallel to each other and arranged front to back, and one connecting seam 301 is on the same straight line as a connecting seam 301 of an adjacent group, and the other connecting seam 301 is staggered front to back with another connecting seam 301 of an adjacent group;

[0032] The PCB fixing plate 3 of this structure can connect the capacitor to four terminal pins 4, which can fully utilize the performance of the capacitor, and one of the connection seams 301 in the two groups is staggered, which can reduce mutual interference and make the layout more reasonable.

[0033] The terminal pin 4 has an "L"-shaped structure, including a longitudinal lead-out section 41 and a transverse welding section 42. The lead-out section 41 is connected in series in the connecting seam 301, and the welding section 42 is placed under the PCB fixing plate 3, and its end extends out of the PCB fixing plate 3 and is welded to the other end of the connecting wire 5.

[0034] In this embodiment, the lead-out section 41 and the connecting seam 301 form an interference fit; in more embodiments, a limited position buckle structure is provided between the lead-out section 41 and the PCB fixing plate 3;

[0035] The position-limiting buckle structure specifically includes a concave point 411 and a convex point 302, one of the concave point 411 and the convex point 302 is arranged on the narrow side of the lead-out section 41, and the other of the concave point 411 and the convex point 302 is arranged on the seam wall of the connecting seam 301, and the assembly position limiting of the terminal pin 4 of the PCB fixing plate 3 is achieved by the buckling connection between the concave point 411 and the convex point 302;

[0036] By utilizing the interference fit or fiber buckle structure, the terminal pins 4 can be pre-installed on the PCB fixing plate 3, which facilitates the subsequent assembly process of placing them on the capacitor core 2 and improves production efficiency.

[0037] The shell 1 is a rectangular parallelepiped, including two long side walls 101 and two short side walls 102; the capacitor core 2 is a flat cylindrical structure and lies horizontally in the inner cavity of the shell 1, wherein two parallel flat surfaces 202 are provided on opposite sides, the two flat surfaces 202 face the two long side walls 101 respectively, and the flat surfaces 202 are against or close to the long side walls 101; the cooperation between the flat surfaces 202 and the long side walls 101 can limit the angle at which the capacitor core 2 is placed in the inner cavity of the shell 1, which plays a limiting role, so that the capacitor core 2 will not rotate at will in the inner cavity of the shell 1.

[0038] The shape of the PCB fixing plate 3 is the same as the shape of the inner cavity of the shell 1 (the shapes of the PCB fixing plate 3 and the inner cavity of the shell 1 are both rectangular); but at least the side edges of the PCB fixing plate 3 abut against the left and right walls of the inner cavity of the shell 1, and the ends of the PCB fixing plate 3 abut against the front and rear walls of the inner cavity of the shell 1;

[0039] When the capacitor core 2 is placed together with the PCB fixing plate 3 in the inner cavity of the shell 1, the PCB fixing plate 3 and the inner walls of the shell 1 are limited against each other, so that the capacitor core is positioned in the middle position of the inner cavity of the shell 1 through the PCB fixing plate 3, leaving a filling gap for epoxy resin filler 6 such as epoxy resin around the capacitor core.

[0040] The capacitor core 2 is made by winding two layers of film, the two layers of film including an outer film 21 and an inner film 22;

[0041] The inner surface of the inner film 22 is symmetrically provided with two inner metal coatings 221, and the two inner metal coatings 221 are separated from each other; the inner surface of the outer film 21 is provided with an outer metal coating 211, and the outer metal coating 211 is connected in series with the two left and right inner metal coatings 221; the outer metal coating 211 is connected in series and in parallel with the two left and right inner metal coatings 221, thereby realizing an internal series connection.

[0042] In addition, the inner metal coating 221 covers the edge of the inner film 22, and a thickened area 222 is provided close to the edge of the inner metal coating 221; the width of the outer film 21 is smaller than the width of the inner film 22, and the outer metal coating 211 is provided in the middle position of the outer film 21, and a margin 212 is formed at the edge of the outer film 21, and the margin 212 is provided corresponding to the thickened area 222.

[0043] Specifically, the length of the capacitor core 2 is W1, and 32mm±2mm≤W1≤52mm±2mm;

[0044] The thickness of the capacitor core 2 is T1, and 8.2mm±2mm≤T1≤31.5mm±2mm;

[0045] The width of the capacitor core 2 is H1, and 16 mm±2 mm≤H1≤44.1 mm±2 mm.

[0046] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A capacitor with a fixed terminal foot distance to the ground, comprising a housing (1) with an opening and a capacitor core (2), characterized in that A PCB fixing plate (3) is arranged on the top of the capacitor core (2); at least two terminal pins (4) arranged at intervals are fixedly connected to the PCB fixing plate (3), and more than two terminal pins (4) extend through the opening and extend outside the housing (1); more than two connecting wires (5) are arranged between the PCB fixing plate (3) and the capacitor core (2) corresponding to the number of terminal pins (4); one end of each connecting wire (5) is welded to the gold-sprayed surface (201) of the capacitor core (2), and the other end is welded to one of the terminal pins (4); the capacitor core (2) and the PCB fixing plate (3) are encapsulated in the inner cavity of the housing (1) by epoxy resin filler (6).

2. A capacitor with fixed terminal pins to ground according to claim 1, characterized in that: The PCB fixing plate (3) is provided with two connecting seams (301) arranged on the left and right, the two terminal pins (4) are respectively inserted into the two connecting seams (301), and the two terminal pins (4) are arranged in the middle of the opening and on the same straight line.

3. A capacitor with fixed terminal pins to ground according to claim 1, characterized in that: The PCB fixing plate (3) is in a "Z"-shaped structure, and a group of connecting seam groups are arranged on the left and right sides thereof, each connecting seam group comprising two connecting seams (301), the two connecting seams (301) in the same group are parallel to each other and arranged front to back, and one connecting seam (301) is on the same straight line as a connecting seam (301) of an adjacent group, and the other connecting seam (301) is staggered front to back with another connecting seam (301) of an adjacent group.

4. A capacitor with fixed terminal pin distance to ground according to claim 2 or 3, characterized in that: The terminal pin (4) is in an "L"-shaped structure, comprising a longitudinal lead-out section (41) and a transverse welding section (42), the lead-out section (41) being connected in series in the connection seam (301), the welding section (42) being placed below the PCB fixing plate (3), and having an end extending out of the PCB fixing plate (3) and welded to the other end of the connecting wire (5).

5. A capacitor with fixed terminal pins to ground according to claim 4, characterized in that: An interference fit is formed between the lead-out section (41) and the connecting seam (301), or a limit buckle structure is provided between the lead-out section (41) and the PCB fixing plate (3).

6. A capacitor with fixed terminal pins to ground according to claim 5, characterized in that: The limiting buckle structure comprises a concave point (411) and a protrusion (302), one of the concave point (411) and the protrusion (302) being arranged on the narrow side of the lead-out section (41), and the other of the concave point (411) and the protrusion (302) being arranged on the seam wall of the connecting seam (301), and the concave point (411) and the protrusion (302) being buckled and connected to achieve the assembly limiting of the PCB fixing plate (3) to the terminal pin (4).

7. A capacitor with fixed terminal pins to ground according to claim 1, characterized in that: The housing (1) is in the form of a rectangular parallelepiped, comprising two long side walls (101) and two short side walls (102); the capacitor core (2) is in the form of a flat cylindrical structure and lies horizontally in the inner cavity of the housing (1), wherein two mutually parallel flat surfaces (202) are provided on opposite sides thereof, the two flat surfaces (202) respectively face the two long side walls (101), and the flat surfaces (202) are arranged against or close to the long side walls (101).

8. The capacitor with fixed terminal pins to ground according to claim 1, characterized in that: The shape of the PCB fixing plate (3) is the same as the shape of the inner cavity of the outer shell (1), but at least the side edges of the PCB fixing plate (3) abut against the left and right walls of the inner cavity of the outer shell (1), and the ends of the PCB fixing plate (3) abut against the front and rear walls of the inner cavity of the outer shell (1), so that the capacitor core (2) is positioned and embedded in the inner cavity of the outer shell (1) through the PCB fixing plate (3).

9. A capacitor with fixed terminal pins to ground according to claim 1, characterized in that: The capacitor core (2) is made by winding two layers of film, the two layers of film including an outer film (21) and an inner film (22); The inner surface of the inner film (22) is symmetrically provided with two inner metal coatings (221), and the two inner metal coatings (221) are separated from each other; the inner surface of the outer film (21) is provided with an outer metal coating (211), and the outer metal coating (211) is connected in series with the left and right inner metal coatings (221).

10. A capacitor with fixed terminal pins to ground according to claim 1, characterized in that: The length of the capacitor core (2) is W1, and 32 mm ± 2 mm ≤ W1 ≤ 52 mm ± 2 mm; The thickness of the capacitor core (2) is T1, and 8.2mm±2mm≤T1≤31.5mm±2mm; The width of the capacitor core (2) is H1, and 16 mm ± 2 mm ≤ H1 ≤ 44.1 mm ± 2 mm.

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