Surface mount type solid plastic package capacitor

Abstract

The utility model discloses a surface-mounted solid plastic package capacitor, which belongs to the technical field of capacitors and comprises a base, a limiting shell is arranged above the base, two groups of fastening bolts are jointly in threaded connection with the inner wall of the limiting shell and the inner wall of the base, and two U-shaped electrode pads are arranged in the base. Two sets of limiting clamping grooves are formed in the upper surface of the base, a solid-state capacitor body is arranged in the limiting shell, and the outer surface of the solid-state capacitor body is fixedly connected with a plastic package shell. According to the surface-mounted solid plastic package capacitor, through the base, the limiting shell, the fastening bolts, the solid capacitor body, the plastic package shell, the conductive electrode plates, the U-shaped electrode bonding pads, the limiting insertion plates and the limiting clamping grooves, the bottom surfaces of the two U-shaped electrode bonding pads can be directly welded with an external circuit; and the relative positions of the solid capacitor body and the base can be fixed through the clamping connection of the limiting insertion plate and the limiting clamping groove, so that the conductive electrode plate and the U-shaped electrode bonding pad can form stable and flexible circuit access butt joint.

Description

Technical Field

[0001] The present application belongs to the technical field of capacitors, and in particular relates to a surface-mount solid-state plastic-sealed capacitor. Background Art

[0002] A capacitor is an electronic component used to store charge and energy. It consists of two electrodes (usually thin metal plates) separated by a dielectric. Capacitors with solid dielectrics are called solid-state capacitors. They are often used in scenarios such as filters, energy storage, coupling and bypass, and frequency adjustment. The performance of a capacitor depends on multiple factors, such as electrode material, dielectric type, capacitance value, and operating voltage. Different types of capacitors are suitable for different application scenarios.

[0003] The utility model with the existing authorization announcement number CN212542195U discloses a chip-type solid-state plastic-encapsulated capacitor, including an element, two lead pins and a plastic encapsulation body that encapsulates the element and the lead pins. The second arms of the connecting terminals are fixed to the two lead pins respectively by conductive glue, and the plastic encapsulation body encapsulates the second arms. The setting of the plastic encapsulation body provides higher strength protection for the solid-state capacitor, ensuring that the capacitor can operate normally under different harsh conditions, increasing the service life of the capacitor, and avoiding the problems of poor overall performance and high production cost of the metal shell of the solid-state capacitor.

[0004] Although the above technical solution provides higher strength protection for solid-state capacitors and increases the service life of the capacitors, the above technical solution lacks a structure that is easy to disassemble and assemble. As a result, after the capacitor is welded, if the capacitor is damaged, the welding part of the capacitor needs to be hot-melted and then replaced with a new capacitor, which can easily damage the corresponding circuit board structure.

[0005] To this end, we propose a chip-type solid-state plastic-sealed capacitor to solve the above problems. Utility Model Content

[0006] The purpose of this application is to solve the problem in the prior art that after the capacitor is welded, if the capacitor is damaged, the welding part of the capacitor needs to be hot-melted and then replaced with a new capacitor, which easily damages the corresponding circuit board structure. A chip-type solid-state plastic-sealed capacitor is proposed.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A surface-mount solid-state plastic-sealed capacitor comprises a base, a limiting shell is provided above the base, the inner wall of the limiting shell and the inner wall of the base are threadedly connected with two groups of fastening bolts, two U-shaped electrode pads are provided inside the base, two groups of limiting slots are provided on the upper surface of the base, a solid-state capacitor body is provided inside the limiting shell, the outer surface of the solid-state capacitor body is fixedly connected to a plastic-sealed shell, the bottom surface of the solid-state capacitor body is fixedly connected to two conductive electrode sheets, and the bottom surface of the plastic-sealed shell is fixedly connected to two groups of limiting plug-ins.

[0009] Preferably, the bottom surface of the limiting shell is in contact with the upper surface of the base, the bottom surface of each conductive electrode sheet is in contact with the upper surface of the U-shaped electrode pad, the outer surface of each group of limiting plug-ins is snapped into the inside of the limiting slot, and the outer surface of each group of fastening bolts is sleeved with two gaskets, and the bottom surface of each gasket is in contact with the outer surface of the limiting shell.

[0010] Preferably, the outer surface of the limiting shell is provided with a plurality of identical first heat dissipation openings, and the upper surface of the limiting shell is provided with a second heat dissipation opening.

[0011] Preferably, the front and back surfaces of the limiting shell are both fixedly connected with anti-skid pads, and the side surfaces of the two anti-skid pads that are away from each other are both fixedly connected with a plurality of identical anti-skid protrusions.

[0012] Preferably, a heat-insulating gasket is fixedly connected to the inner top wall of the limiting shell, and the bottom surface of the heat-insulating gasket is in contact with the upper surface of the plastic-sealed shell.

[0013] Preferably, two thermal insulation sleeves are fixedly connected to the inner wall of the base, and the inner wall of each thermal insulation sleeve is fixedly connected to the outer surface of the U-shaped electrode pad.

[0014] In summary, the technical effects and advantages of this application are:

[0015] Through the mutual cooperation of the base, limiting shell, fastening bolts, solid capacitor body, plastic shell, conductive electrode sheet, U-shaped electrode pad, limiting plug plate and limiting slot, the bottom surface of the two U-shaped electrode pads can be directly welded to the external circuit, and the clamping connection between the limiting plug plate and the limiting slot can fix the relative position of the solid capacitor body and the base, so that the conductive electrode sheet and the U-shaped electrode pad can form a stable and flexible circuit path docking. Therefore, when the solid capacitor body needs to be repaired or replaced, the fastening bolts are removed, the limiting plug plate is pulled out of the limiting slot, and the limiting plug plate on the solid capacitor body to be repaired or replaced is inserted into the limiting slot. After the conductive electrode sheet and the U-shaped electrode pad are tightly docked, the fastening bolts are used to fasten the base and the limiting shell again, which makes it easy to disassemble and assemble the solid capacitor body without damaging the corresponding circuit, and avoids the problem that after the capacitor is welded, if the capacitor is damaged, the capacitor welding part needs to be hot-melted and then replaced with a new capacitor, which easily damages the corresponding circuit board structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the SMD solid-state plastic-sealed capacitor of the utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the base of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the solid-state capacitor of the present invention when viewed from above;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the limit shell of the utility model when viewed from the side.

[0020] In the figure: 1. Base; 2. Limiting shell; 3. Fastening bolts; 4. Solid-state capacitor body; 5. Plastic shell; 6. Conductive electrode sheet; 7. U-shaped electrode pad; 8. Limiting plug-in board; 9. Limiting slot; 10. Gasket; 11. Anti-slip pad; 12. Anti-slip boss; 13. First heat dissipation outlet; 14. Second heat dissipation outlet; 15. Thermal insulation gasket; 16. Thermal insulation sleeve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-4A surface-mount solid-state plastic-sealed capacitor includes a base 1, a limiting shell 2 is arranged above the base 1, the inner wall of the limiting shell 2 and the inner wall of the base 1 are threadedly connected with two groups of fastening bolts 3, the bottom surface of the limiting shell 2 is in contact with the upper surface of the base 1, and the outer surface of each group of fastening bolts 3 is sleeved with two gaskets 10, and the bottom surface of each gasket 10 is in contact with the outer surface of the limiting shell 2. By providing the gasket 10, it can be padded between the limiting shell 2 and the fastening bolt 3 and increase the contact area between the two, thereby increasing the fastening effect of the fastening bolt 3.

[0023] Two U-shaped electrode pads 7 are provided inside the base 1, two groups of limit slots 9 are provided on the upper surface of the base 1, a plurality of identical first heat dissipation ports 13 are provided on the outer surface of the limit shell 2, and a second heat dissipation port 14 is provided on the upper surface of the limit shell 2. By providing the first heat dissipation port 13, the heat dissipation effect of the limit shell 2 on the internal components of the limit shell 2 can be increased around the limit shell 2. By providing the second heat dissipation port 14, the heat dissipation effect of the top of the limit shell 2 on the internal components of the limit shell 2 can be increased.

[0024] A solid capacitor body 4 is provided inside the limiting shell 2, and the outer surface of the solid capacitor body 4 is fixedly connected to the plastic shell 5. The front and back of the limiting shell 2 are fixedly connected with anti-slip pads 11, and the two anti-slip pads 11 are fixedly connected to a plurality of identical anti-slip protrusions 12 on the side away from each other. By providing the anti-slip protrusions 12, the friction force on the outer surface of the anti-slip pads 11 can be increased. By providing the anti-slip pads 11 and the anti-slip protrusions 12, the friction force on the front and back of the limiting shell 2 can be jointly increased, thereby making it convenient to pinch the outer surface of the limiting shell 2 and pull up the limiting shell 2 when the limiting shell 2 is removed from the base 1.

[0025] The bottom surface of the solid-state capacitor body 4 is fixedly connected to two conductive electrode sheets 6, and the bottom surface of each conductive electrode sheet 6 is in contact with the upper surface of the U-shaped electrode pad 7. The inner top wall of the limiting shell 2 is fixedly connected to a thermal insulation gasket 15, and the bottom surface of the thermal insulation gasket 15 is in contact with the upper surface of the plastic shell 5. By providing the thermal insulation gasket 15, it itself has good thermal insulation and high temperature resistance, and can be made of materials such as ceramic fiber or aerogel.

[0026] Two groups of limiting plug-ins 8 are fixedly connected to the bottom surface of the plastic shell 5, and the outer surface of each group of limiting plug-ins 8 is snapped into the inside of the limiting slot 9. Two insulating sleeves 16 are fixedly connected to the inner wall of the base 1, and the inner wall of each insulating sleeve 16 is fixedly connected to the outer surface of the U-shaped electrode pad 7. By providing the insulating sleeve 16, it can be made of materials such as ceramic fiber or aerogel, and can be placed between the base 1 and the U-shaped electrode pad 7, thereby increasing the thermal insulation and high temperature resistance between the two.

[0027] The working principle of the present invention is as follows: when in use, the solid-state capacitor body 4 with the plastic-sealed shell 5 and the limiting plug-in plate 8 is placed on the base 1, and then the relative positions of the solid-state capacitor body 4 and the base 1 are fixed by the clamping of the limiting plug-in plate 8 and the limiting slot 9, and the two conductive electrode sheets 6 are tightly docked with the two U-shaped electrode pads 7 respectively, and then the limiting shell 2 is covered on the solid-state capacitor body 4 and tightly docked with the base 1, and at the same time, the bottom surface of the thermal insulation gasket 15 is tightly attached to the upper surface of the plastic-sealed shell 5, and the limiting shell 2 and the base 1 are fastened and docked with four fastening bolts 3 in conjunction with the gasket 10. When the capacitor needs to be welded to the circuit, the bottom surfaces of the two U-shaped electrode pads 7 in the base 1 are welded in the circuit structure. When the solid-state capacitor needs to be replaced When installing the capacitor 4, after removing the four fastening bolts 3 from the limit shell 2, pull the solid-state capacitor body 4 and the plastic shell 5 together with the limit plug-in plate 8 out of the limit slot 9, after inspecting or replacing a new solid-state capacitor body 4, insert the limit plug-in plate 8 on the inspected or new solid-state capacitor body 4 into the limit slot 9, then cover the limit shell 2 on the solid-state capacitor body 4 and dock it with the base 1, and finally use the combination of fastening bolts 3 and gaskets 10 to fasten the limit shell 2 and the base 1 to dock. The design of the entire chip-type solid-state plastic-sealed capacitor effectively solves the problem that due to the lack of a structure that is easy to disassemble and assemble, if the capacitor is damaged after being welded, it is necessary to hot-melt the capacitor welding part and then replace it with a new capacitor, which easily damages the corresponding circuit board structure.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0029] Furthermore, 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. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A chip-type solid-state plastic-sealed capacitor, comprising a base (1), characterized in that: A limiting shell (2) is arranged above the base (1); the inner wall of the limiting shell (2) and the inner wall of the base (1) are threadedly connected with two groups of fastening bolts (3); two U-shaped electrode pads (7) are arranged inside the base (1); two groups of limiting slots (9) are opened on the upper surface of the base (1); a solid capacitor (4) is arranged inside the limiting shell (2); the outer surface of the solid capacitor (4) is fixedly connected to a plastic-sealed shell (5); the bottom surface of the solid capacitor (4) is fixedly connected to two conductive electrode sheets (6); and the bottom surface of the plastic-sealed shell (5) is fixedly connected to two groups of limiting plug plates (8).

2. A SMD solid-state plastic-sealed capacitor according to claim 1, characterized in that: The bottom surface of the limiting shell (2) contacts the top surface of the base (1), the bottom surface of each conductive electrode sheet (6) contacts the top surface of the U-shaped electrode pad (7), the outer surface of each group of limiting plug plates (8) is snap-fitted to the inside of the limiting slot (9), and the outer surface of each group of fastening bolts (3) is sleeved with two gaskets (10), and the bottom surface of each gasket (10) contacts the outer surface of the limiting shell (2).

3. The SMD solid-state plastic-sealed capacitor according to claim 1, characterized in that: The outer surface of the limiting shell (2) is provided with a plurality of identical first heat dissipation openings (13), and the upper surface of the limiting shell (2) is provided with a second heat dissipation opening (14).

4. The SMD solid-state plastic-sealed capacitor according to claim 1, characterized in that: The front side of the limiting shell (2) and the back side of the limiting shell (2) are both fixedly connected with anti-skid pads (11), and the side surfaces of the two anti-skid pads (11) that are away from each other are both fixedly connected with a plurality of identical anti-skid convex columns (12).

5. The SMD solid-state plastic-sealed capacitor according to claim 1, characterized in that: A heat-insulating gasket (15) is fixedly connected to the inner top wall of the limiting shell (2), and the bottom surface of the heat-insulating gasket (15) is in contact with the upper surface of the plastic-sealed shell (5).

6. The SMD solid-state plastic-sealed capacitor according to claim 1, characterized in that: Two heat-insulating sleeves (16) are fixedly connected to the inner wall of the base (1), and the inner wall of each heat-insulating sleeve (16) is fixedly connected to the outer surface of the U-shaped electrode pad (7).

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