Three-pin capacitor

Abstract

The utility model provides a three-pin capacitor, comprising a housing, a core sleeved in the housing, pins connected on the core, a rubber plug arranged in the housing, the bottom of each pin passing through the rubber plug to form a connecting end, a third pin arranged on the rubber plug, the top of the third pin being flush with the surface of the inner end of the rubber plug, the bottom of the third pin passing through the surface of the rubber plug to form a third end, a buffer area is reserved between the rubber plug and the core, a pin of the buffer area is in a big-end-down cone shape, and the tip end of the pin is located in the core direction. After the scheme is adopted, the structure is reasonable, the heat insulation effect is good, and integrity is high.

Description

Technical Field

[0001] The utility model relates to the technical field of spare parts, in particular to a three-pin capacitor. Background Art

[0002] Traditional pins are straight pins. After the capacitor is assembled, the bottom of the core will directly contact the plug, causing wear on the bottom of the core. At the same time, when in use, the plug will contact the circuit board, and the heat on the circuit board will be directly transferred to the core through the plug, causing excessive heat inside the capacitor. At the same time, due to the small pin hole of the plug, the straight pin is difficult to position when inserting the plug and is easy to deform. Moreover, most plugs are cylindrical. After the shell is assembled, the capacitor as a whole will have an extra shell thickness, which is not conducive to the miniaturization of the capacitor. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a three-pin capacitor with a low overall height. The stepped fitting is also conducive to the sealing of the shell. The structure after adopting this solution is reasonable, the heat insulation effect is good, and the integrity is strong.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a three-pin capacitor, which includes a shell, a core is mounted in the shell, and the core is connected to the pins, wherein a rubber plug is provided in the shell, the bottom of the pin passes through the rubber plug to form a connection end, a third pin is provided on the rubber plug, the top of the third pin is flush with the inner end surface of the rubber plug, and the bottom of the third pin passes through the surface of the rubber plug to form a third end, a buffer zone is reserved between the rubber plug and the core, and the pins of the buffer zone are tapered with a small top and a large bottom, and the tip is located in the direction of the core.

[0005] The rubber plug includes a plug body, the bottom of the plug body shrinks to form a stepped shrinkage ring, the bottom of the outer shell shrinks toward the center and is embedded in the shrinkage ring, the stepped bottom of the rubber plug and the bottom of the shrinkage surface of the outer shell are located on the same plane, the rubber plug is provided with a pin hole running through the top and bottom, the diameter of the pin hole is the same as the diameter of the pin embedding section, the lower part of the pin hole shrinks to form a cone shape, the diameter of the cone shape is the same as the diameter of the pin transition section.

[0006] The top of the pin is a flat connecting section, which is connected to the core. The pins at the bottom of the connecting section gradually expand to form a cone, and the pins at the bottom of the cone extend to form a cylindrical inlaid section. The pins at the bottom of the inlaid section gradually shrink to form a transition section with the tip pointing downward, and the connecting end is formed by extending from the bottom of the transition section.

[0007] The top of the third leg expands to form a limiting ring, the surface of the limiting ring is flush with the inner end surface of the plug, the middle of the third leg is cylindrical, the lower part of the third leg gradually shrinks to form a cone with a larger top and a smaller bottom, and the third end is formed by extending downward from the bottom of the cone.

[0008] After adopting the above solution, the outer shell, core, pins, and third pin are combined to form a three-pin capacitor. The pins are composed of a connecting section, a tapered section, an inlaid section, a transition section, and a connecting end. The tapered section forms a buffer zone between the core and the plug, isolating the plug from heat and effectively protecting the core. The cylindrical inlaid section increases the overall strength of the pins, the shrink ring at the bottom of the plug reduces the overall height of the capacitor, and the stepped inlay facilitates the sealing of the outer shell. This solution results in a reasonable structure, good thermal insulation, and strong integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0010] Figure 2 It is a cross-sectional view of the present utility model.

[0011] Figure 3 This is a schematic diagram of the rubber plug of the present utility model.

[0012] Figure 4 This is a schematic diagram of the third leg of the present invention.

[0013] Figure 5 This is a schematic diagram of the pins of the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with all the accompanying drawings. The preferred embodiments of the present invention are as follows: Figure 1 To the attached Figure 5 The three-pin capacitor described in this embodiment includes a shell 1, a core 2 is mounted inside the shell 1, and a pin 3 is connected to the core 2. A rubber plug 4 is provided inside the shell 1, and the bottom of the pin 3 passes through the rubber plug 4 to form a connection end. A third pin 5 is provided on the rubber plug 4, and the top of the third pin 5 is flush with the inner end surface of the rubber plug 4. The bottom of the third pin 5 passes through the surface of the rubber plug 4 to form a third end. A buffer zone is reserved between the rubber plug 4 and the core 2. The pin 3 of the buffer zone is tapered with a small top and a large bottom, and its tip is located in the direction of the core 2.

[0015] The rubber plug 4 comprises a body, the bottom of which contracts to form a stepped shrinking ring. The bottom of the outer shell 1 contracts toward the center and fits within the shrinking ring. The stepped bottom of the plug 4 and the bottom of the shrinking surface of the outer shell 1 are coplanar. A pin hole 7 extends vertically through the plug 4. The diameter of the pin hole 7 is the same as the diameter of the embedded section of the pin 3. The lower portion of the pin hole 7 contracts to form a conical cylindrical shape, the diameter of which is the same as the diameter of the transition section of the pin 3. The top of the pin 3 forms a flat connecting section that connects to the core 2. The pin 3 at the bottom of the connecting section gradually expands to form a cone. The pin 3 at the bottom of the cone extends to form a cylindrical embedded section. The pin 3 at the bottom of the embedded section gradually contracts to form a transition section with a downward-pointing tip. The connecting end is formed by the bottom of the transition section. The top of the third leg 5 expands to form a retaining ring 6, the surface of which is flush with the inner surface of the plug 4. The middle portion of the third leg 5 is cylindrical, and the lower portion of the third leg 5 gradually contracts to form a cone with a larger top and a smaller bottom. The third end is formed by the downward extension of the tapered bottom.

[0016] After adopting the above scheme, the shell, core, pin and third pin are combined to form a three-pin capacitor, the pin and the bottom of the third pin are flush, the lower part of the conical pin hole is embedded in the conical transition section of the pin to form a mortise and tenon joint, which effectively prevents the electrolyte in the core from leaking out of the pin hole. The pin is composed of a connecting section, a conical section, an inlaid section, a transition section and a connecting end. The conical section can form a buffer zone between the core and the plug to prevent the core from being damaged by direct contact with the plug, and at the same time isolate the heat of the plug to prevent the electric heat from being directly transferred to the core, thereby effectively protecting the core; the use of a cylindrical inlaid section can increase the overall strength of the pin, and the plug is provided with a through hole that is larger at the top and smaller at the bottom that matches the inlaid section, which can guide the insertion of the pin and prevent the pin from deforming during the insertion of the plug. The bottom of the plug shrinks to form a stepped shrinkage ring, and the stepped bottom of the plug and the bottom of the shrinkage surface of the shell are located on the same plane. In this way, the overall height of the capacitor can be reduced, and the use of a stepped inlay is also beneficial to the sealing of the shell. After adopting this scheme, the structure is reasonable, the heat insulation effect is good, and the integrity is strong.

[0017] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any changes made based on the shape and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-pin capacitor, comprising a housing (1), a core (2) housed within the housing (1), and pins (3) connected to the core (2), characterized in that: A rubber plug (4) is provided in the shell (1), the bottom of the pin (3) passes through the rubber plug (4) to form a connection end, a third pin (5) is provided on the rubber plug (4), the top of the third pin (5) is flush with the inner end surface of the rubber plug (4), the bottom of the third pin (5) passes through the surface of the rubber plug (4) to form a third end, a buffer zone is reserved between the rubber plug (4) and the core (2), the pin (3) of the buffer zone is tapered with a small top and a large bottom, and its tip is located in the direction of the core (2); the rubber plug (4) includes a plug body, the bottom of the plug body shrinks to form a stepped shrink ring, the bottom of the shell (1) shrinks toward the center and is embedded in the shrink ring, the stepped bottom of the rubber plug (4) and the bottom of the shrink surface of the shell (1) are located on the same plane, a pin hole (7) is provided on the rubber plug (4) that passes through from top to bottom, the diameter of the pin hole (7) is the same as the diameter of the embedded section of the pin (3), the lower part of the pin hole (7) shrinks to form a cone, and the diameter of the cone is the same as the diameter of the transition section of the pin (3).

2. The three-pin capacitor according to claim 1, characterized in that: The top of the pin (3) is a flat connecting section, which is connected to the core (2). The pin (3) at the bottom of the connecting section gradually expands to form a cone, and the pin (3) at the bottom of the cone extends to form a cylindrical inlaid section. The pin (3) at the bottom of the inlaid section gradually shrinks to form a transition section with a downward tip, and the connecting end is formed by extending from the bottom of the transition section.

3. The three-pin capacitor according to claim 1, wherein: The top of the third leg (5) is expanded to form a limiting ring (6), the surface of the limiting ring (6) is flush with the inner end surface of the rubber plug (4), the middle of the third leg (5) is cylindrical, the lower part of the third leg (5) gradually shrinks to form a cone with a larger upper part and a smaller lower part, and the third end is formed by extending downward from the bottom of the cone.

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