A contact connection structure and high-voltage DC relay

Abstract

The present invention discloses a contact connection structure and a high-voltage DC relay. The contact connection structure includes a contact and a lead terminal. An axial end of the contact is provided with an embedded protrusion, and a side surface of the embedded protrusion is provided with a rotation-stopping protrusion. An end of the lead terminal used for connecting to the contact is provided with an embedded groove. The embedded protrusion and the rotation-stopping protrusion of the contact enter the embedded groove, and at least one of the embedded protrusion, the rotation-stopping protrusion, and the sidewall of the embedded groove is squeezed and deformed to form an interlocking structure, thereby restricting the embedded protrusion from exiting the embedded groove and rotating around the axis of the embedded groove. The present invention can achieve a reliable connection between the contact and the lead terminal, while avoiding the problems of oxidized contacts and cold solder joints caused by high-temperature welding, and the problem of gaps in riveted perforations affecting sealing performance. Therefore, the present invention is suitable for use in sealed environments, and the contacts and lead terminals can be made of different materials to improve electrical performance and reduce costs.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and in particular to a contact connection structure and a high-voltage direct current relay. Background Art

[0002] In some vacuum-sealed environments, such as vacuum-sealed relays, it is necessary to have energized contacts in the sealed environment. The contacts need to be assembled on the lead terminals, and when the two contacts come into contact, the lead terminals are energized. Because one end of the lead terminal needs to be in a sealed environment and the other end is exposed to the outside, the connection between the contacts and the lead terminals needs to prevent the seal of the lead terminals from failing. Currently, there are three ways to set contacts on the lead terminals: the first way is to integrate the contacts and the lead terminals, that is, the lead terminals themselves have a contact structure. Although this method meets the use requirements of a sealed environment, it usually has poor electrical performance due to the material limitations of the lead terminals. If the lead terminals are made of materials with better electrical performance, it will result in higher costs. The second way is resistance welding, in which the contacts are welded to the lead terminals. Although this method can also meet the use requirements of a sealed environment, the principle of resistance welding is that a large current is required to form a high-temperature melting weld point, which forms a weld nugget after cooling. Silver-containing contacts are easily oxidized at high temperatures, which reduces the performance of the contacts themselves. In addition, resistance welding is prone to cold solder joints. The third method is the traditional contact rivet perforation riveting solution. However, gaps will appear in the riveting perforation, so it cannot be used in a sealed environment.

[0003] Therefore, the present invention is dedicated to providing a connection structure between a lead terminal and a contact, which can be used in a sealed environment and does not oxidize the contact. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art and provides a contact connection structure and a high-voltage DC relay, which can realize reliable connection between contacts and lead-out terminals, can be used in a sealed environment, and will not oxidize the contacts.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a contact connection structure, including a contact and a lead-out terminal, an embedded protrusion is provided at one axial end of the contact, a rotation-stopping protrusion is provided on the side of the embedded protrusion, and an embedded groove is provided at one end of the lead-out terminal used for connecting to the contact; the embedded protrusion and the rotation-stopping protrusion of the contact enter the embedded groove, and at least one of the embedded protrusion, the rotation-stopping protrusion and the side wall of the embedded groove is squeezed and deformed to form an interlocking, so as to limit the embedded protrusion from exiting the embedded groove and rotating around the axis of the embedded groove.

[0006] Furthermore, the side wall of the embedding groove and the portion corresponding to the anti-rotation protrusion are squeezed and deformed by the anti-rotation protrusion to form a anti-rotation groove and a locking protrusion located inside the anti-rotation groove. The anti-rotation protrusion is embedded in the anti-rotation groove, and the locking protrusion clamps the embedding protrusion.

[0007] Furthermore, the radial dimension of the embedded protrusion at a portion between the tail end thereof and the anti-rotation protrusion gradually increases from the root end of the embedded protrusion toward the tail end of the embedded protrusion.

[0008] Furthermore, the embedded protrusion is provided with an anti-retreat structure on the side between its tail end and the anti-rotation protrusion, which cooperates and clamps with the locking protrusion. The anti-retreat structure includes an anti-retreat flange or an anti-retreat protrusion corresponding to the embedded protrusion.

[0009] Furthermore, the radial dimension of the embedding groove is greater than or equal to the radial dimension of the portion of the embedding protrusion between its tail end and the anti-rotation protrusion.

[0010] Furthermore, there are multiple anti-rotation protrusions, and the multiple anti-rotation protrusions are distributed at intervals along the circumference of the embedded protrusion.

[0011] Furthermore, the anti-rotation protrusion is a tooth-shaped structure.

[0012] Furthermore, the embedded protrusion is located on the end surface of one axial end of the contact, and the embedded protrusion is located on the end surface of one axial end of the lead-out end; the end surface of the contact provided with the embedded protrusion is in contact with the end surface of the lead-out end provided with the embedded groove.

[0013] Furthermore, the end face of one axial end of the lead-out terminal is provided with the embedding groove, the side face of the other axial end of the lead-out terminal is provided with an outer flange, and / or the end face of the other axial end of the lead-out terminal is provided with a threaded hole.

[0014] The present invention further provides a high-voltage DC relay, comprising a plurality of contact connection structures as described above in the present invention, wherein the contact connection structures constitute static contacts.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The contacts of the present invention utilize the embedded protrusions and the anti-rotation protrusions to connect with the embedded grooves of the lead terminals, and interlocking is achieved by extrusion deformation, which restricts the embedded protrusions from exiting the embedded grooves and rotating around the axis of the embedded grooves, thereby achieving a reliable connection between the contacts and the lead terminals. At the same time, there will be no problems of oxidized contacts and cold solder joints caused by high-temperature welding, and there will be no problems of gaps in riveted perforations that affect the sealing performance. Therefore, the contacts are suitable for use in sealed environments, and the contacts and lead terminals can be made of different materials to improve electrical performance and reduce costs.

[0017] 2. The side wall of the embedded groove and the portion corresponding to the anti-rotation protrusion are squeezed and deformed by the anti-rotation protrusion to form a anti-rotation groove and a locking protrusion located on the inner side of the anti-rotation groove. The anti-rotation protrusion is engaged with the anti-rotation groove, and the locking protrusion clamps the embedded protrusion, thereby realizing the anti-retreat and anti-rotation functions of the embedded protrusion. The process is simple, the cost is low, and the reliability of the combination of the contact and the lead-out terminal can be improved.

[0018] 3. The radial dimension of the embedded protrusion between its tail end and the anti-rotation protrusion gradually increases from the root end of the embedded protrusion to the tail end of the embedded protrusion, or the embedded protrusion is provided with the anti-retraction structure to ensure the reliability of the connection between the contact and the lead-out terminal.

[0019] 4. The radial dimension of the embedding groove is greater than or equal to the radial dimension of the embedding protrusion between its tail end and the anti-rotation protrusion, so that the embedding protrusion between its tail end and the anti-rotation protrusion can easily enter the embedding groove.

[0020] 5. There are multiple anti-rotation protrusions, which can form multiple anti-rotation grooves and positioning protrusions, so that the contact and the lead-out terminal are combined more tightly and reliably.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the contact connection structure and high-voltage DC relay of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the contact of the present invention Figure 1 (The tail end of the embedded protrusion faces downward);

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the contact of the present invention Figure 2 (The tail end of the embedded protrusion faces upwards);

[0024] Figure 3 is a cross-sectional view of a contact of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the lead-out terminal of the present invention;

[0026] Figure 5 is a cross-sectional view of the lead-out terminal of the present invention;

[0027] Figure 6 is a cross-sectional view of the contacts and lead terminals of the present invention in a pre-stressed state;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure after the contact and the lead-out terminal of the present invention are connected;

[0029] Figure 8is a cross-sectional view of the present invention after the contact and the lead-out terminal are connected;

[0030] Figure 9 yes Figure 8 A magnified schematic diagram of part A;

[0031] Figure 10 is a cross-sectional view of a high-voltage DC relay of the present invention;

[0032] Among them, 1. contact, 11. embedded protrusion, 12. anti-rotation protrusion, 13. end face, 2. lead end, 21. embedded groove, 22. end face, 23. outer flange, 24. threaded hole, 25. anti-rotation groove, 26. locking protrusion; 3. static contact, 4. relay body. DETAILED DESCRIPTION

[0033] See Figures 1-9 As shown, a contact connection structure of the present invention includes a contact 1 and a lead terminal 2. An inserting protrusion 11 is provided on the end surface of one axial end of the contact 1, and a rotation-stopping protrusion 12 is provided on the side of the inserting protrusion 11. An inserting groove 21 is provided on the end surface of the lead terminal 2 for connecting with the contact 1. The inserting protrusion 11 and the rotation-stopping protrusion 12 of the contact 1 are inserted into the inserting groove 21, and at least one of the inserting protrusion 11, the rotation-stopping protrusion 12, and the sidewall of the inserting groove 21 is squeezed and deformed to form an interlocking structure, thereby restricting the inserting protrusion 11 from exiting the inserting groove 21 and rotating about the axis of the inserting groove 21. The rotation-stopping protrusion 12 has a tooth-shaped structure and can therefore also be referred to as a rotation-stopping tooth.

[0034] In this embodiment, the distance between the end of the anti-rotation protrusion 12 that is away from the center of the embedded protrusion 11 and the center of the embedded protrusion 11 is greater than the radius of the notch of the embedded groove 21. During the process of the embedded protrusion 11 and the anti-rotation protrusion 12 of the contact 1 being pressed into the embedded groove 21, the side wall of the embedded groove 21 and the portion corresponding to the anti-rotation protrusion 12 are squeezed and deformed by the anti-rotation protrusion 12, forming a anti-rotation groove 25 and a locking protrusion 26 located inside the anti-rotation groove 25. The anti-rotation protrusion 12 is engaged with the anti-rotation groove 25 to limit the rotation of the embedded protrusion 11 around the axis of the embedded groove 21. The locking protrusion 26 clamps the embedded protrusion 11 to limit the embedded protrusion 11 from exiting the embedded groove 21. The inside of the anti-rotation groove 25 refers to the side of the anti-rotation groove 25 close to the bottom of the embedded groove 21.

[0035] In this embodiment, the radial dimension of the portion of the embedding protrusion 11 between its tail end and the anti-rotation protrusion 12 gradually increases from the root end of the embedding protrusion 11 toward the tail end of the embedding protrusion 11, so that the locking protrusion 26 is closely attached to the side surface of the portion of the embedding protrusion 11 between its tail end and the anti-rotation protrusion 12, forming a locking position, so that the embedding protrusion 11 cannot exit the embedding groove 21. In other embodiments, the side surface of the portion of the embedding protrusion between its tail end and the anti-rotation protrusion is provided with an anti-retraction structure that cooperates with the locking protrusion and is locked. The anti-retraction structure may include an anti-retraction flange or an anti-retraction protrusion corresponding to the embedding protrusion.

[0036] In this embodiment, the radial dimension of the embedding groove 21 is greater than or equal to the radial dimension of the portion of the embedding protrusion 11 between its rear end and the anti-rotation protrusion 12, so that the portion of the embedding protrusion 11 between its rear end and the anti-rotation protrusion 12 can smoothly and unobstructedly enter the embedding groove 21. The embedding groove 21 is specifically a circular straight groove, but is not limited thereto.

[0037] In this embodiment, the number of the anti-rotation protrusions 12 is specifically multiple, and the multiple anti-rotation protrusions 12 are distributed at intervals along the circumference of the embedding protrusion 11. The multiple means two or more. Specifically, the number of the anti-rotation protrusions 12 is many, so that a plurality of anti-rotation grooves 25 and locking protrusions 26 can be formed in the embedding groove 21 of the lead terminal 2, thereby making the contact 1 and the lead terminal 2 more tightly and reliably connected.

[0038] In this embodiment, after the embedding protrusion 11 and the anti-rotation protrusion 12 of the contact 1 are pressed into the embedding groove 21, the end surface 13 of the contact 1 with the embedding protrusion 11 contacts and cooperates with the end surface 22 of the lead-out terminal 2 with the embedding groove 21.

[0039] In this embodiment, the end face 22 of one axial end of the lead end 2 is provided with the embedding groove 21, the side face of the other axial end of the lead end 2 is provided with an outer flange 23, and the end face of the other axial end of the lead end 2 is provided with a threaded hole 24.

[0040] The present invention relates to a contact connection structure. When connecting, the embedded protrusion 11 is first placed between its tail end and the anti-rotation protrusion 12 into the embedded groove 21. At this time, the anti-rotation protrusions 12 on the side of the embedded protrusion 11 are placed against the end surface 22 of the lead end 2 provided with the embedded groove 21. Figure 6 Then, use pressure to press in so that the anti-rotation protrusion 12 squeezes the end surface 22 of the lead-out terminal 2 provided with the embedded groove 21, causing the side walls of the embedded groove 21 and the corresponding parts of each anti-rotation protrusion 12 to be squeezed and deformed by the anti-rotation protrusion 12, forming the anti-rotation groove 25 and the positioning protrusion 26, as shown. Figure 8 、 Figure 9As shown; when the end face 13 of the contact 1 provided with the embedded protrusion 11 contacts the end face 22 of the lead-out end 2 provided with the embedded groove 21, the pressing action stops, and at the same time, the embedded protrusion 11 and the locking protrusion 26 protruding from the side of the embedded groove 21 are engaged and interlocked, completing the anti-pull-out riveting fit; the anti-rotation protrusion 12 and the anti-rotation groove 25 are engaged and interlocked, completing the anti-axis rotation riveting fit.

[0041] The present invention provides a contact connection structure that reliably connects a contact 1 and a lead terminal 2. Not only is it suitable for use in sealed environments, but it also allows the contact 1 and lead terminal 2 to be made of different materials, thereby improving electrical performance and reducing costs. Furthermore, the present invention eliminates the problems of contact oxidation and cold solder joints caused by high-temperature welding, and avoids the problem of gaps in riveted perforations that affect sealing performance. The present invention enables automated mass production, thereby reducing costs, improving performance, and increasing production efficiency.

[0042] The touch connection structure of the present invention can be used as a static contact and applied to electronic devices such as high-voltage DC relays and starter switches.

[0043] See Figures 1-10 As shown, a high-voltage DC relay according to the present invention includes several contact connection structures according to the present invention described above, wherein the contact connection structures constitute static contacts 3. Specifically, there are two static contacts 3, each of which is sealed and penetrates the top of a relay body 4 of the high-voltage DC relay. Contact points 1 of the two static contacts 3 are located in a sealed cavity formed within the relay body 4.

[0044] Regarding the connection structure and principle of the contact 1 and the lead-out terminal 2 of the high-voltage DC relay of the present invention, please refer to the above description thereof and will not be repeated here.

[0045] The contact connection structure and high-voltage DC relay of the present invention are the same as those in the prior art or can be implemented by using the prior art.

[0046] The above embodiments are only used to further illustrate a contact connection structure and a high-voltage DC relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the technical solution of the present invention.

Claims

1. A contact connection structure, comprising a contact and a lead-out terminal, characterized in that: An embedding protrusion is provided at one axial end of the contact, a rotation-stopping protrusion is provided on the side of the embedding protrusion, and an embedding groove is provided at one end of the lead-out end for connecting to the contact; the embedding protrusion and the rotation-stopping protrusion of the contact enter the embedding groove, and at least one of the embedding protrusion, the rotation-stopping protrusion and the side wall of the embedding groove is squeezed and deformed to form an interlocking, so as to limit the embedding protrusion from exiting the embedding groove and rotating around the axis of the embedding groove, so that the contact connection structure is suitable for a sealed environment.

2. The contact connection structure according to claim 1, wherein: The side wall of the embedding groove and the portion corresponding to the anti-rotation protrusion are squeezed and deformed by the anti-rotation protrusion to form a anti-rotation groove and a locking protrusion located inside the anti-rotation groove. The anti-rotation protrusion is embedded in the anti-rotation groove, and the locking protrusion clamps the embedding protrusion.

3. The contact connection structure according to claim 1 or 2, characterized in that: The radial dimension of the portion of the embedding protrusion between the tail end thereof and the anti-rotation protrusion gradually increases from the root end of the embedding protrusion toward the tail end of the embedding protrusion.

4. The contact connection structure according to claim 2, wherein: The side surface of the embedded protrusion between its tail end and the anti-rotation protrusion is provided with an anti-retreat structure that cooperates with the locking protrusion and is clamped. The anti-retreat structure includes an anti-retreat flange or an anti-retreat protrusion corresponding to the embedded protrusion.

5. The contact connection structure according to claim 1 or 2, characterized in that: The radial dimension of the embedding groove is greater than or equal to the radial dimension of the portion of the embedding protrusion between its tail end and the anti-rotation protrusion; the distance between the end of the anti-rotation protrusion away from the center of the embedding protrusion and the center of the embedding protrusion is greater than the radius of the notch of the embedding groove.

6. The contact connection structure according to claim 1 or 2, characterized in that: There are multiple anti-rotation protrusions, and the multiple anti-rotation protrusions are distributed at intervals along the circumference of the embedded protrusion.

7. The contact connection structure according to claim 1 or 2, characterized in that: The anti-rotation protrusion is in a tooth-shaped structure.

8. The contact connection structure according to claim 1 or 2, characterized in that: The embedded protrusion is located on the end surface of one axial end of the contact, and the embedded protrusion is located on the end surface of one axial end of the lead-out end; the end surface of the contact provided with the embedded protrusion is in contact with the end surface of the lead-out end provided with the embedded groove.

9. The contact connection structure according to claim 1, wherein: The end surface of one axial end of the lead-out terminal is provided with the embedding groove, the side surface of the other axial end of the lead-out terminal is provided with an outer flange, and / or the end surface of the other axial end of the lead-out terminal is provided with a threaded hole.

10. A high voltage DC relay, characterized in that: The invention comprises several contact connection structures according to any one of claims 1 to 9, wherein the contact connection structures constitute static contacts.

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