Surface-mounted film capacitor

Abstract

The utility model relates to a surface-mounted film capacitor, which comprises a shell, a pin lead and a limiting sleeve, the pin lead can be inserted into the limiting sleeve, a capacitor inner core part is arranged in the shell, the top of the capacitor inner core part is provided with a jack structure matched with the limiting sleeve, the limiting sleeve can be fixedly connected with the shell through a fastening assembly, and the pin lead can be inserted into the limiting sleeve. A contact part is arranged at the bottom end of the pin wire, when the pin wire is inserted into the limiting sleeve and the limiting sleeve is inserted into the jack structure, the bottom end of the pin wire can be limited at the bottom end of the limiting sleeve through the top end of the contact part, and the bottom end of the contact part is in contact with a capacitor core body contained in the capacitor inner core part. According to the utility model, the pin lead can be quickly disassembled and assembled in a direct insertion mode, and the pin lead is prevented from being damaged during disassembly and assembly.

Description

Technical Field

[0001] This utility model relates to the field of thin film capacitor technology, and in particular to surface mount thin film capacitors. Background Technology

[0002] In film capacitors, the capacitor core is typically made of a metallized thin film wound together and then led out through lead wires. It is usually encapsulated externally, with filler material between the encapsulation and the capacitor core. The lead wires are usually soldered to the capacitor core, and these lead wires are easily damaged during disassembly and repair.

[0003] The utility model with publication number CN213845047U discloses a plug-in film capacitor, which includes a shell, a capacitor core and wires. The wires are threadedly connected to the shell, and the end of the wires that contacts the capacitor core is a contact head.

[0004] In the above technical solution, the wire is connected to the capacitor shell through a threaded connection. When the wire is disassembled and assembled, it will be rotated frequently and twisted. The threads on the wire will wear down, and the wire is easily damaged when it is disassembled and assembled repeatedly. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a surface-mount film capacitor, the specific technical solution of which is as follows:

[0006] A surface-mount film capacitor includes a housing, lead wires, and a limiting sleeve. The lead wires can be inserted into the limiting sleeve. The housing contains a capacitor core. The top of the capacitor core has a socket structure that matches the limiting sleeve. The limiting sleeve can be fixedly connected to the housing by a fastening component. The bottom end of the lead wire has a contact portion. When the lead wire is inserted into the limiting sleeve and the limiting sleeve is inserted into the socket structure, the bottom end of the lead wire is limited by the top end of the contact portion at the bottom end of the limiting sleeve. The bottom end of the contact portion contacts the capacitor core contained in the capacitor core.

[0007] As an improvement to the above technical solution: the inner core of the capacitor includes a mounting plate, a resin layer and a capacitor core. The resin layer is filled between the inner side of the outer shell and the outer side of the capacitor core. The lead wire is located on the top of the resin layer. The mounting plate is fixedly installed on the top of the inner side of the outer shell by bolts.

[0008] As an improvement to the above technical solution: the socket structure includes a first through groove and a second through groove, the second through groove and the first through groove are coaxially arranged, the top end of the second through groove extends to the top of the mounting plate, the bottom end of the second through groove extends to the bottom of the mounting plate, the top end of the first through groove extends to the top of the resin layer, and the bottom end of the first through groove extends to the top of the capacitor core.

[0009] As an improvement to the above technical solution: the fastening assembly includes a fixing sleeve and a fixing cover. The fixing sleeve is fixedly connected to the top of the mounting plate and located on the outer side of the top of the second through groove. The fixing cover is fixedly connected to the outer side of the top of the limiting sleeve. The outer side of the fixing sleeve is threaded, and the inner sidewall of the fixing cover is provided with a threaded groove that matches the fixing sleeve.

[0010] As an improvement to the above technical solution: the top of the mounting plate is provided with an annular sealing groove, and the annular sealing groove is located on the outer periphery of the top of the second through groove, and the bottom of the fixing cover has an annular sealing block that matches the annular sealing groove.

[0011] As an improvement to the above technical solution: a second sealing ring layer is provided in the second through groove, a second sealing ring layer is provided in the first through groove, and a third sealing ring layer is provided on the outer side of the annular sealing block.

[0012] As an improvement to the above technical solution: the contact part is a conductive metal contact block, the diameter of the conductive metal contact block is equal to that of the first through groove, and the diameter of the pin wire is smaller than the diameter of the conductive metal contact block.

[0013] The beneficial effects of this utility model are:

[0014] When installing the lead wire inside the housing, first insert the tip of the lead wire from the bottom of the limiting sleeve upwards, so that the conductive metal contact block is limited at the bottom of the limiting sleeve. Insert the lead wire and the limiting sleeve together into the first and second through slots. Then rotate the fixing cover on the top of the limiting sleeve to tighten the fixing cover and the fixing sleeve together. This will cause the limiting sleeve and the conductive metal contact block to move downwards, gradually allowing the bottom of the conductive metal contact block to contact the top of the capacitor core. This quickly limits the lead wire inside the housing and makes contact with the capacitor core. When removing the lead wire from the housing, simply rotate to remove the fixing cover and then pull the lead wire upwards. When installing or removing the lead wire from the housing, the lead wire can be quickly installed or removed by direct insertion, avoiding damage to the lead wire during installation or removal. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0016] Figure 2 This is a schematic diagram of the overall internal structure of this utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 4 for Figure 2 A magnified structural diagram at point B in the middle.

[0019] Reference numerals: 1. Outer shell; 2. Resin layer; 20. First through groove; 21. Second sealing ring layer; 3. Capacitor core; 4. Lead wire; 41. Conductive metal contact block; 5. Mounting plate; 50. Annular sealing groove; 51. Second through groove; 52. Second sealing ring layer; 6. Fixing cover; 61. Annular sealing block; 7. Fixing sleeve; 8. Limiting sleeve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Example

[0022] Please refer to Figure 1-Figure 4 A surface-mount film capacitor includes a housing 1, lead wires 4, and a limiting sleeve 8. The lead wires 4 can be inserted into the limiting sleeve 8. The housing 1 has a capacitor core inside. The top of the capacitor core has a socket structure that matches the limiting sleeve 8. The limiting sleeve 8 can be fixedly connected to the housing 1 by a fastening component. The bottom end of the lead wires 4 has a contact portion. When the lead wires 4 are inserted into the limiting sleeve 8 and the limiting sleeve 8 is inserted into the socket structure, the bottom end of the lead wires 4 can be limited at the bottom end of the limiting sleeve 8 by the top end of the contact portion. The bottom end of the contact portion contacts the capacitor core 3 contained in the capacitor core. Specifically, the limiting sleeve 8 and the mounting plate 5 can be made of insulating material to prevent the lead wires 4 from conducting electricity to the mounting plate 5 and the limiting sleeve 8.

[0023] In an optional embodiment: the inner core of the capacitor includes a mounting plate 5, a resin layer 2 and a capacitor core 3. The resin layer 2 is filled between the inner side of the outer casing 1 and the outer side of the capacitor core 3. The lead wire 4 is located on top of the resin layer 2. The mounting plate 5 is fixedly mounted on the top inner side of the outer casing 1 by bolts.

[0024] In an optional embodiment: the socket structure includes a first through groove 20 and a second through groove 51, the second through groove 51 and the first through groove 20 are coaxially arranged, the top end of the second through groove 51 extends to the top of the mounting plate 5, the bottom end of the second through groove 51 extends to the bottom of the mounting plate 5, the top end of the first through groove 20 extends to the top of the resin layer 2, and the bottom end of the first through groove 20 extends to the top of the capacitor core 3.

[0025] In an optional embodiment: the fastening assembly includes a fixing sleeve 7 and a fixing cover 6. The fixing sleeve 7 is fixedly connected to the top of the mounting plate 5 and located on the outer side of the top of the second through groove 51. The fixing cover 6 is fixedly connected to the outer side of the top of the limiting sleeve 8. The outer side of the fixing sleeve 7 is threaded, and the inner sidewall of the fixing cover 6 is provided with a threaded groove that matches the fixing sleeve 7.

[0026] In an optional embodiment: the mounting plate 5 has an annular sealing groove 50 on its top, and the annular sealing groove 50 is located on the outer periphery of the top of the second through groove 51. The bottom of the fixing cover 6 has an annular sealing block 61 that is adapted to the annular sealing groove 50. The annular sealing block 61 can be inserted into the annular sealing groove 50. When the pin wire 4 is inserted into the limiting sleeve 8, and the fixing cover 6 is tightened onto the fixing sleeve 7, the bottom of the annular sealing block 61 can contact the bottom of the annular sealing groove 50. The bottom end of the conductive metal contact block 41 contacts the top of the capacitor core 3, and the bottom end of the limiting sleeve 8 contacts the top of the conductive metal contact block 41. Thus, the pin wire 4 can be effectively limited in the limiting sleeve 8, and the conductive metal contact block 41 contacts the top of the capacitor core 3, ensuring the normal use of the pin wire 4.

[0027] In an optional embodiment: a second sealing ring layer 52 is provided in the second through groove 51, a second sealing ring layer 21 is provided in the first through groove 20, and a third sealing ring layer is provided on the outer side of the annular sealing block 61, thereby improving the sealing performance when the pin wire 4 is inserted into the housing 1.

[0028] In an optional embodiment: the contact part is a conductive metal contact block 41, the diameter of the conductive metal contact block 41 is equal to that of the first through groove 20, and the diameter of the lead wire 4 is smaller than the diameter of the conductive metal contact block 41, so that the conductive metal contact block 41 can be connected to the bottom of the lead wire 4, and then through the cooperation of the limiting sleeve 8, the bottom end of the lead wire 4 is limited to the bottom of the first through groove 20 by the conductive metal contact block 41.

[0029] Specifically, when installing the lead wire 4 inside the housing 1, first insert the top of the lead wire 4 from the bottom of the limiting sleeve 8 upwards, so that the conductive metal contact block 41 is limited at the bottom of the limiting sleeve 8. Insert the lead wire 4 and the limiting sleeve 8 together into the first through slot 20 and the second through slot 51. Then rotate the fixing cover 6 on the top of the limiting sleeve 8 so that the fixing cover 6 and the fixing sleeve 7 are tightened together. This will cause the limiting sleeve 8 and the conductive metal contact block 41 to move downwards, gradually allowing the bottom of the conductive metal contact block 41 to contact the top of the capacitor core 3. This will quickly limit the lead wire 4 inside the housing 1 and make contact with the capacitor core 3. When removing the lead wire 4 from the housing 1, simply rotate and remove the fixing cover 6, and then pull the lead wire 4 upwards. When installing or removing the lead wire 4 from the housing 1, the lead wire 4 can be quickly installed or removed by direct insertion, avoiding damage to the lead wire 4 during installation or removal.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A surface-mount film capacitor, characterized in that, The device includes a housing (1), lead wires (4), and a limiting sleeve (8). The lead wires (4) can be inserted into the limiting sleeve (8). The housing (1) has a capacitor core inside. The top of the capacitor core has a socket structure that matches the limiting sleeve (8). The limiting sleeve (8) can be fixedly connected to the housing (1) by a fastening assembly. The bottom end of the lead wires (4) has a contact portion. When the lead wires (4) are inserted into the limiting sleeve (8) and the limiting sleeve (8) is inserted into the socket structure, the bottom end of the lead wires (4) can be limited to the bottom end of the limiting sleeve (8) by the top end of the contact portion. The bottom end of the contact portion contacts the capacitor core (3) contained in the capacitor core.

2. The surface-mount film capacitor according to claim 1, characterized in that: The inner core of the capacitor includes a mounting plate (5), a resin layer (2) and a capacitor core (3). The resin layer (2) is filled between the inner side of the outer shell (1) and the outer side of the capacitor core (3). The lead wire (4) is located on the top of the resin layer (2). The mounting plate (5) is fixedly mounted on the top of the inner side of the outer shell (1) by bolts.

3. The surface-mount film capacitor according to claim 2, characterized in that: The socket structure includes a first through groove (20) and a second through groove (51). The second through groove (51) and the first through groove (20) are coaxially arranged. The top end of the second through groove (51) extends to the top of the mounting plate (5), and the bottom end of the second through groove (51) extends to the bottom of the mounting plate (5). The top end of the first through groove (20) extends to the top of the resin layer (2), and the bottom end of the first through groove (20) extends to the top of the capacitor core (3).

4. The surface-mount film capacitor according to claim 3, characterized in that: The fastening assembly includes a fixing sleeve (7) and a fixing cover (6). The fixing sleeve (7) is fixedly connected to the top of the mounting plate (5) and located on the outer side of the top of the second through groove (51). The fixing cover (6) is fixedly connected to the outer side of the top of the limiting sleeve (8). The outer side of the fixing sleeve (7) is threaded, and the inner sidewall of the fixing cover (6) is provided with a threaded groove that matches the fixing sleeve (7).

5. The surface-mount film capacitor according to claim 4, characterized in that: The mounting plate (5) has an annular sealing groove (50) on its top, and the annular sealing groove (50) is located on the outer periphery of the top of the second through groove (51). The bottom of the fixing cover (6) has an annular sealing block (61) that is compatible with the annular sealing groove (50).

6. The surface-mount film capacitor according to claim 5, characterized in that: The second through groove (51) is provided with a second sealing ring layer (52), the first through groove (20) is provided with a second sealing ring layer (21), and the outer side of the annular sealing block (61) is provided with a third sealing ring layer.

7. The surface-mount film capacitor according to claim 1, characterized in that: The contact portion is a conductive metal contact block (41), the diameter of which is equal to that of the first through groove (20), and the diameter of the lead wire (4) is smaller than that of the conductive metal contact block (41).

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