Large overcurrent connection device

Abstract

The present application relates to the field of connector, disclose a kind of large overcurrent connection device, including electrically connected to a first conductive element first conductive part, second conductive part and third conductive part, first conductive part has drum spring structure and first plug cavity;Third conductive part includes connecting structure and the inner collection structure coaxial with connecting structure, second plug cavity is formed in connecting structure, and the inner collection cavity for second conductive part is inserted therein and is wedge-shaped with it Matching is formed in inner collection structure.Invention enables second conductive part and the first conductive part connected to second conductive part can be adjusted in the direction of insertion, realize floating connection and conduction, drum spring structure ensures that second conductive part has sufficient overcurrent capacity while realizing multidirectional adjustment and pre-tightening, inner collection structure completes occlusion locking while being compatible with assembly deviation, ensure the stable interconnection of second conductive part and third conductive part and reliable electrical connection, meet high reliability and high vibration level requirement.

Description

Technical Field

[0001] This invention relates to the field of connectors, and in particular to a high-current connection device. Background Technology

[0002] In the manufacturing and application of electronic devices, the carrier circuit is the packaging substrate or chip carrier used to carry integrated circuit chips, serving as a bridge connecting the chip to the external circuit board. Interconnecting the carrier circuit and the integrated circuit board represents the sum of technologies used in electronic packaging to construct electrical connections at all levels from the chip's interior to the circuit board. High-current interconnect devices are conductive devices used to achieve interconnection and conduction between the carrier circuit and the integrated circuit board. They typically use pins or leads as interconnects and are electrically connected by hand soldering. However, when circuits require high reliability and high vibration levels, this interconnection can cause the hand-soldered solder joints to crack, failing to meet the usage requirements. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a large overcurrent connection device to solve the problem that the existing large overcurrent connection devices cannot meet the requirements of large vibration levels.

[0004] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: providing a large overcurrent connection device including a first conductive part, a second conductive part, and a third conductive part electrically connected to a first conductive element; the second conductive part has a spring structure that can be elastically expanded or contracted and a first insertion cavity for inserting the first conductive part therein and communicating with it; the third conductive part includes a connection structure for welding to a second conductive element and an inward structure coaxial with the connection structure; the connection structure has a second insertion cavity for inserting the second conductive part therein and elastically resisting it; the inward structure has an inward cavity for inserting the second conductive part therein and wedge-shaped fitting it.

[0005] Furthermore, the first conductive part extends along an insertion direction into the first insertion cavity; the second conductive part also has a welding structure coaxially connected to one end of the drum spring structure along the insertion direction, a first cavity is formed in the welding structure, the first conductive part is inserted therein along the insertion direction, and there is a solder gap between the first conductive part and the first cavity.

[0006] Furthermore, the welding structure has a first ring section, a second ring section, and a third ring section in sequence along the insertion direction. The first ring section is connected to the drum spring structure. The second ring section includes multiple connecting ribs arranged circumferentially between the first ring section and the second ring section. The connecting ribs are spaced apart to form a solder gap that penetrates the inner and outer walls of the second ring section to connect the first cavity section.

[0007] Furthermore, the drum spring structure has a fourth ring section and a drum spring section connected at one end to the fourth ring section and at the other end to the welded structure in sequence along the insertion direction. The drum spring section includes multiple spring strips that are evenly distributed around the circumference, and the middle of each spring strip is curved outward in the radial direction and gradually widens.

[0008] Furthermore, the fourth annular segment and the inner sides of each spring strip jointly form a second cavity segment, and the first cavity segment and the second cavity segment are jointly configured as the first insertion cavity.

[0009] Furthermore, the second conductive part also has a guide structure coaxially connected to the fourth annular section along the insertion direction, the guide structure being arranged with a gradually narrowing end and having the same outer diameter as the fourth annular section.

[0010] Furthermore, the third conductive part also includes a welding ring coaxially connected between the connecting structure and the inward structure, the welding ring being used for welding to the first conductive element.

[0011] Furthermore, the outer diameter of the connecting structure is less than the outer diameter of the inner structure connected to one end of the welding ring, which is less than the outer diameter of the welding ring.

[0012] Furthermore, at least three weld grooves are formed on the weld ring that extend through the weld ring along the insertion direction, and the weld grooves extend radially outward and are flush with the outer wall of the connecting structure radially inward.

[0013] Furthermore, the inward structure includes a fifth ring segment connected to the welding ring and a plurality of elastic arms distributed at equal intervals along the circumference, with the end of each elastic arm away from the fifth ring segment arranged inwardly at an angle.

[0014] The large current-carrying connection device of the present invention has at least the following beneficial effects: through the cooperation of the connection structure and the drum spring structure, the second conductive part and the first conductive part connected to the second conductive part can be adjusted in position in the insertion direction to achieve floating connection and conduction; the drum spring structure ensures that the second conductive part has sufficient current-carrying capacity while realizing multi-directional adjustment and pre-tightening; the inward structure is compatible with assembly deviations while completing the interlocking and locking, ensuring stable interconnection and reliable electrical connection between the second conductive part and the third conductive part, and meeting the requirements of high reliability and high vibration level. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of a structure of an embodiment of the large current connection device of the present invention; Figure 2 This is a front view of an embodiment of the large current connection device of the present invention; Figure 3 This is a partial cross-sectional view of an embodiment of the large current connection device of the present invention; Figure 4 This is an exploded view of an embodiment of the large current connection device of the present invention; Figure 5 This is a schematic diagram of the structure of the second conductive part in one embodiment of the large overcurrent connection device of the present invention; Figure 6 This is a schematic diagram of the structure of the third conductive part in one embodiment of the large overcurrent connection device of the present invention. The meanings of the labels in the attached diagram are as follows: First conductive part 1, second conductive part 2, welding structure 21, first annular section 211, second annular section 212, connecting rib 2121, solder gap 2122, third annular section 213, drum spring structure 22, fourth annular section 221, drum spring section 222, guide structure 23, third conductive part 3, connecting structure 31, inward structure 32, fifth annular section 321, elastic arm 322, inward cavity 323, welding ring 33, welding groove 331, first conductive element 4, second conductive element 5, hole structure 51. Detailed Implementation

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Please see Figures 1 to 4 The large current connection device of the present invention includes a first conductive part 1 electrically connected to a first conductive element 4, a second conductive part 2 electrically connected to the first conductive part 1, and a third conductive part 3 soldered to a second conductive element 5. The third conductive part 3 is also electrically connected to the second conductive part 2 to achieve electrical connection. The first conductive element 4 is a carrier circuit, the second conductive element 5 is an integrated circuit board, and the first conductive part 1, the second conductive part 2, and the third conductive part 3 are used to interconnect the carrier circuit and the integrated circuit board. The first conductive part 1, the second conductive part 2, and the third conductive part 3 are coaxial in one direction and interlocked with each other, and the corresponding directions in which the first conductive part 1, the second conductive part 2, and the third conductive part 3 are interlocked are configured as the interlocking directions.

[0018] The first conductive part 1 is arranged along the extension and has a rod-shaped structure. The first conductive part 1 is a pin (or lead) integrally connected to the first conductive element 4. It is made of conductive material such as copper, so that it has a high current carrying capacity through the material itself.

[0019] Please see Figure 5The second conductive part 2 includes a welding structure 21, a drum spring structure 22, and a guide structure 23 in sequence along its own axis. The welding structure 21 is welded to the first conductive part 1 after it is inserted into the second conductive part 2. The drum spring structure 22 achieves movable insertion with the third conductive part 3 through elastic expansion or contraction, providing multi-directional anti-vibration effect while ensuring that it will not loosen. The guide structure 23 ensures the guiding installation of the second conductive part 2.

[0020] Specifically, the welding structure 21 includes, in sequence along the insertion direction, a first annular segment 211, a second annular segment 212, and a third annular segment 213. Both the first annular segment 211 and the third annular segment 213 are annular in shape, and the first annular segment 211 is coaxially connected to one end of the drum spring structure 22 along the insertion direction. The second annular segment 212 is cylindrical and includes multiple connecting ribs 2121 spaced circumferentially between the first annular segment 211 and the second annular segment 212. The connecting ribs 2121 are spaced apart to form solder gaps 2122 that penetrate the inner and outer walls of the second annular segment 212. When the first conductive part 1 is inserted into the welding structure 21, solder can penetrate through the solder gaps and extend into the welding structure 21. The solder gaps 2122 increase the bonding force of the solder between the first conductive part 1 and the second conductive part 2. Simultaneously, the presence of the connecting ribs 2121 and the solder gaps 2122 guides the extension of the solder, facilitating rapid completion of the welding work. The solder gaps 2122 also facilitate observation of the interior of the second conductive part 2. The end of the third annular segment 213 furthest from the second annular segment 212 is chamfered or rolled inwards. A first cavity is formed by the inner sides of the first annular segment 211, the second annular segment 212, and the third annular segment 213. The first cavity extends through the welding structure 21 along the insertion direction, and the first conductive part 1 is inserted into it along the insertion direction. A solder gap 2122 connects the first cavity. When the first conductive part 1 is soldered to the second conductive part 2 through the solder gap 2122, conductivity is achieved between the first conductive part 1 and the second conductive part 2.

[0021] In this embodiment, the first annular segment 211, the second annular segment 212, and the third annular segment 213 are all formed by rolling a sheet-like structure and have two separable dividing edges. Therefore, the inner diameter of the first cavity segment can be less than or equal to the outer diameter of the first conductive part 1. When the first conductive part 1 is inserted into the first cavity segment, the insertion can be completed by spreading the welding structure 21. Of course, the inner diameter of the first cavity segment can also be greater than the outer diameter of the first conductive part 1, and the connection and conduction can be achieved solely by welding.

[0022] The drum spring structure 22 has a fourth annular section 221 and a drum spring section 222 connected at one end to the fourth annular section 221 and at the other end to the welded structure 21 along the insertion direction. The end of the drum spring section 222 away from the fourth annular section 221 is connected to the first annular section 211. Specifically, the fourth annular section 221 is circular and its outer diameter is the same as that of the first annular section 211. The drum spring section 222 includes multiple spring strips that are evenly spaced around the fourth annular section 221. The middle of each spring strip is radially arched and gradually widens, so that each spring strip has a structure that is narrow at both ends and wide in the middle. When the drum spring structure 22 is inserted into the third conductive part 3, the resistance is smaller, the deformation capacity of the end is improved, and it has high elasticity. It can generate a movement gap in the radial direction through deformation when it is inserted with the third conductive part 3. The gradually widening in the middle increases the contact area, and the contact is tighter while improving the vibration resistance and stabilizing the resistance. The structure of the spring strips can avoid stress concentration, making the stress more uniform and the stability higher. The fourth ring section 221 and the inner side of each spring strip are jointly enclosed to form a second cavity section. The first cavity section and the second cavity section are jointly configured as a first insertion cavity. The first insertion cavity is adapted to the first conductive part 1 so that the first conductive part 1 can be inserted therein.

[0023] The guide structure 23 is coaxially connected to the fourth annular section 221 along the insertion direction. The end of the guide structure 23 is gradually narrowed and its outer diameter is the same as that of the fourth annular section 221 to facilitate the assembly of the second conductive part 2. The second conductive part 2 is made of conductive copper, and a plating layer that facilitates welding is provided on the surface of the second conductive part 2 to facilitate welding the second conductive part 2 to the first conductive part 1.

[0024] Please see Figure 6 The third conductive part 3 includes a connecting structure 31 for welding to the second conductive element 5, an inwardly recessed structure 32 coaxial with the connecting structure 31, and a welding ring 33 connecting the connecting structure 31 and the inwardly recessed structure 32. Specifically, the connecting structure 31 is annular and adapted to a corresponding hole structure 51 on the second conductive element 5, so that it can be inserted into the hole structure 51 in the insertion direction. A second insertion cavity is formed in the connecting structure 31 for the second conductive part 2 to be inserted therein, and the drum spring structure 22 can elastically resist it after being inserted therein, thereby achieving positioning.

[0025] The inward structure 32 includes a fifth ring section 321 connected to the welding ring 33 and a plurality of elastic arms 322 evenly distributed along the circumference. The end of each elastic arm 322 away from the fifth ring section 321 is inclined inward. The fifth ring section 321 is frustoconical and wider on the side connected to the welding ring 33 and narrower on the side away from the welding ring 33. Each elastic arm 322 is evenly distributed along the circumference of the fifth ring section 321 and can be configured as four or five. The elastic arms 322 extend along the extension direction of the fifth ring section 321 toward the side away from the welding ring 33, so that the end of each elastic arm 322 away from the fifth ring section 321 gradually converges and the whole is in the shape of a frustum. The inner structure 32 is surrounded by the fifth ring section 321 and each elastic arm 322 to form an inner cavity 323 for the second conductive part 2 to be inserted therein and wedge-shaped. The inner cavity 323 is frustum-shaped and gradually narrows away from the welding ring 33, so that the fifth ring section 321 and the inner cavity 323 are close to the end of the fifth ring section 321 for easy guidance, and the elastic arms 322 ensure that they are precisely engaged and locked with the second conductive part 2, ensuring the connection between the second conductive part 2 and the third conductive part 3. It should be noted that the inner diameter of the end of the inner cavity 323 away from the welding ring 33 is smaller than the outer diameter of the fourth annular section 221, and the inner diameter of the end of the inner cavity 323 close to the welding ring 33 is larger than the outer diameter of the fourth annular section 221. This ensures that the inner structure 32 can be used to hold the second conductive part 2 after the guide structure 23 and the fourth annular section 221 are inserted into it. The drum spring structure 22 can also be inserted into the inner cavity 323, but the drum spring structure 22 should be avoided from contacting the elastic arm 322 to prevent the second conductive part 2 from slipping relative to the inclined inner cavity 323.

[0026] The welding ring 33 is integrally connected to the connecting structure 31 and the fifth annular segment 321. The welding ring 33 is circular and coaxially arranged with the connecting structure 31 and the fifth annular segment 321. The welding ring 33 is used for welding to the first conductive element 4. Specifically, at least three welding grooves 331 are formed on the welding ring 33, which extend through the welding ring 33 in the insertion direction. For example, four welding grooves 331 are provided. Each welding groove 331 extends radially outward. In order to facilitate welding the third conductive part 3 to the second conductive element 5 after it is installed on the second conductive element, the outer diameter of the connecting structure 31 is less than the outer diameter of the end of the inward structure 32 connected to the welding ring 33 (i.e., the end of the fifth annular segment 321 connected to the welding ring 33) and less than the outer diameter of the welding ring 33. The welding grooves 331 are also radially inward and flush with the outer wall of the connecting structure 31, so that the end of the inward structure 32 blocks part of the welding grooves 331. The outward side of the welding grooves 331 is radially distributed around the periphery of the inward structure 32. The welding grooves 331 are U-shaped. When the connecting structure 31 is inserted into the corresponding hole structure 51 of the second conductive element 5 and welded, the outer diameter of the solder ring 33 is larger than the inner diameter of the hole structure 51 and remains on the surface of the second conductive element 5. During welding, the solder groove 331 allows the welding torch to be inserted more easily, and the solder can flow along the solder groove 331 to the connecting structure 31 and contact the connecting structure 31 and the inward-facing structure 32 that blocks the solder groove 331 when it solidifies, thereby improving the weld strength between the entire third conductive part 3 and the second conductive element 5. It should be noted that the third conductive part 3 is also made of a conductive material such as copper, and a welding-aiding plating layer is also plated on the surface of the third conductive part 3.

[0027] Compared with the prior art, the large current-carrying connection device of the present invention has the following advantages: the first insertion cavity in the second conductive part 2 facilitates the insertion of the first conductive part 1; the welding structure 21 facilitates the welding of the first conductive part 1 and the second conductive part 2; the drum spring structure 22 has high elasticity while ensuring sufficient current carrying capacity; when inserted into the second insertion cavity, it can adjust the tightness in the radial direction and float its position relative to the third conductive part 3 in the insertion direction (or axial direction), thereby improving vibration resistance; the structure of the third conductive part 3 reduces the welding difficulty between it and the second conductive element 5, improves the welding firmness, and the inward structure 32 improves the compatibility when the second conductive part 2 is inserted into it, reduces the assembly difficulty caused by assembly deviation, forms a stable interconnected electrical connection, and meets the requirements of high reliability and high vibration level of the circuit.

Claims

1. A large current-carrying connection device, characterized in that, include: The first conductive part is electrically connected to a first conductive element; The second conductive part has an elastically expandable or contractible drum spring structure and a first insertion cavity into which the first conductive part is inserted and connected. as well as The third conductive part includes a connection structure for welding onto a second conductive element and an inward structure coaxial with the connection structure. The connection structure has a second insertion cavity in which the second conductive part is inserted and elastically abuts. The inward structure has an inward cavity in which the second conductive part is inserted and wedge-shaped.

2. The large current connection device as described in claim 1, characterized in that: The first conductive part extends along an insertion direction into the first insertion cavity; The second conductive part also has a welding structure coaxially connected to one end of the drum spring structure along the insertion direction. A first cavity is formed in the welding structure, and the first conductive part is inserted therein along the insertion direction. There is a solder gap between the first conductive part and the first cavity.

3. The large current connection device as described in claim 2, characterized in that: The welding structure has a first ring section, a second ring section and a third ring section in sequence along the insertion direction. The first ring section is connected to the drum spring structure. The second ring section includes a plurality of connecting ribs arranged circumferentially between the first ring section and the second ring section. The connecting ribs are spaced apart to form a solder gap that penetrates the inner and outer walls of the second ring section to connect the first cavity section.

4. The large current connection device as described in claim 2, characterized in that: The drum spring structure has a fourth ring section and a drum spring section connected at one end to the fourth ring section and at the other end to the welded structure along the insertion direction. The drum spring section includes multiple spring strips evenly distributed around the circumference, and the middle of each spring strip is curved outward in the radial direction and gradually widens.

5. The large current connection device as described in claim 4, characterized in that: The fourth ring section and the inner side of each spring strip together form a second cavity section, and the first cavity section and the second cavity section are configured together as the first insertion cavity.

6. The large current connection device as described in claim 4, characterized in that: The second conductive part also has a guide structure coaxially connected to the fourth annular section along the insertion direction, the guide structure being arranged with a gradually narrowing end and having the same outer diameter as the fourth annular section.

7. The large current connection device as described in claim 1, characterized in that: The third conductive part further includes a welding ring coaxially connected between the connecting structure and the inward structure, the welding ring being used for welding to the first conductive element.

8. The large current connection device as described in claim 7, characterized in that: The outer diameter of the connecting structure is less than the outer diameter of the inner structure connected to one end of the welding ring, which is less than the outer diameter of the welding ring.

9. The large current connection device as described in claim 8, characterized in that: The welding ring has at least three welding grooves that extend through it along the insertion direction, and the welding grooves extend radially outward and are flush with the outer wall of the connecting structure radially inward.

10. The large current connection device as described in claim 7, characterized in that: The inward structure includes a fifth ring segment connected to the welding ring and a plurality of elastic arms distributed at equal intervals along the circumference, with the end of each elastic arm away from the fifth ring segment arranged inwardly at an angle.

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