Self-locking electrical connection structure and high-voltage switchgear

Abstract

The self-locking electrical connection structure disclosed in this invention includes a first conductor and a second conductor, and further includes: a latching contact finger hinged to the second conductor for electrical connection and engagement with a slot on the outer periphery of the first conductor; a reset elastic element for gripping the latching contact finger in the slot; an unlocking device disposed on the path along which the latching contact finger slides in the slot, allowing the latching contact finger to disengage from the slot when engaged with the unlocking device; and a contact plate for electrical connection to the end of the first conductor and connected to the second conductor via a conductive compression elastic element, wherein the latching contact finger engages with the slot when the conductive compression elastic element is compressed to a preset state. This invention achieves self-locking through the engagement of the latching contact finger and the slot, ensuring connection stability and high reliability. Unlocking can be quickly achieved through the engagement of the latching contact finger and the unlocking device, simplifying the installation and disassembly steps of the electrical connection. This invention also discloses a high-voltage switchgear.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switch technology, and more specifically, to a self-locking electrical connection structure and a high-voltage switchgear. Background Technology

[0002] Gas-insulated metal-enclosed switchgear and high-voltage switchgear are both commonly used equipment in the high-voltage electrical field. Gas-insulated metal-enclosed switchgear mainly consists of circuit breakers, disconnecting switches, grounding switches, instrument transformers, busbars, etc. These components are also called the functional units of the gas-insulated metal-enclosed switchgear, and each functional unit is completely enclosed in a metal-grounded housing. Both gas-insulated metal-enclosed switchgear and high-voltage switchgear require electrical connection structures.

[0003] The electrical connection structure is a detachable location located inside gas-insulated, metal-enclosed switchgear and high-voltage switchgear, enabling the continuity of current between the conductors at both ends. The conductive connection structure includes conductors at both ends and a shield fixed to one of the conductors. The shield is used to shield against electric arcs generated during the electrical connection.

[0004] To maintain reliability during electrical connections, two common methods are bolted connections and finger-sliding connections. Bolted connections secure the conductors at both ends with bolts during the electrical connection, thus locking the conductors in place and providing high reliability. However, installation and disassembly are more cumbersome, and bolt mounting holes need to be provided near the outer casing.

[0005] A sliding contact connection involves installing a spring on one conductor. The tension of the spring grips the other conductor, achieving point contact. While sliding contact connections are easy to install and remove, they cannot securely lock the conductors, resulting in poor reliability of the electrical connection.

[0006] Therefore, how to simplify the installation and disassembly steps of electrical connections while ensuring high reliability has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a self-locking electrical connection structure, so as to simplify the installation and disassembly steps of the electrical connection while ensuring high reliability of the electrical connection.

[0008] Another object of the present invention is to provide a high-voltage switchgear having the above-described self-locking electrical connection structure.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A self-locking electrical connection structure includes a first conductor and a second conductor, and further includes:

[0011] At least two snap-fit ​​contacts are hinged to the second conductor. When the first conductor and the second conductor are electrically connected, the snap-fit ​​contacts are used to electrically engage with a slot on the outer peripheral surface of the first conductor.

[0012] A reset elastic element is provided to allow the latching contact to grip the slot. An unlocking device is provided on the first conductor. The unlocking device is located on the path along which the latching contact slides in the slot. When the latching contact engages with the unlocking device, the latching contact is disengaged from the slot.

[0013] The contact plate is used to electrically connect to the end of the first conductor and to the second conductor through a conductive compression elastic element. When the conductive compression elastic element is compressed to a preset state, the snap-on contact finger engages with the slot.

[0014] Preferably, in the above-described self-locking electrical connection structure, the second conductor includes a base and a shielding cover located around the base, and the snap-on contact finger is hinged to the base and located within the enclosure of the shielding cover;

[0015] The contact plate is mounted on the base via a conductive compression elastic element and is located within the enclosure of the shield.

[0016] Preferably, in the above-mentioned self-locking electrical connection structure, the unlocking device is an unlocking protrusion disposed in the slot and corresponding one-to-one with the latching finger. The side of the unlocking protrusion close to the latching finger smoothly transitions to the bottom of the slot.

[0017] Preferably, in the above-described self-locking electrical connection structure, the height of the unlocking protrusion is not less than the depth of the slot.

[0018] Preferably, in the above-mentioned self-locking electrical connection structure, the unlocking device is an unlocking groove formed on the outer surface of the first conductor and corresponding one-to-one with the latching fingers. The first end of the unlocking groove is connected to the slot, and the second end is inclined toward the end of the first conductor that contacts the contact plate.

[0019] The depth of the first end of the unlocking groove is greater than the depth of the second end, and the unlocking groove smoothly transitions from the first end to the second end.

[0020] Preferably, in the above-described self-locking electrical connection structure, the depth of the first end of the unlocking groove is the same as the depth of the slot, and the depth of the second end of the unlocking groove is 0.

[0021] Preferably, in the above-described self-locking electrical connection structure, one of the first conductor and the second conductor is provided with a region mark, and the other is provided with an indicator mark, wherein the region mark includes a self-locking mark and an unlocking mark;

[0022] When the indicator mark and the self-locking mark correspond, the first conductor and the second conductor are in a self-locking state;

[0023] When the indicator mark and the unlock mark correspond, the first conductor and the second conductor are in the unlocked state.

[0024] Preferably, in the above-described self-locking electrical connection structure, the plug end of the first conductor is provided with a guide portion for opening the latching contact finger, and the end diameter of the guide portion is smaller than the area enclosed by the latching contact finger.

[0025] Preferably, in the above-mentioned self-locking electrical connection structure, the snap-fit ​​contact finger is hinged to the second conductor via a telescopic shaft. The hinge support of the second conductor has a hinge hole for the telescopic shaft to pass through. The snap-fit ​​contact finger has hinge plates that clamp onto both sides of the hinge support. The side of the hinge plate facing the hinge support has a blind mounting hole. The two ends of the telescopic shaft are respectively disposed in the blind mounting holes of the two hinge plates.

[0026] Preferably, in the above-described self-locking electrical connection structure, the conductive compression elastic element is a compression spring with a silver-plated coating; and / or

[0027] The reset elastic element is a torsion spring.

[0028] Preferably, in the above-described self-locking electrical connection structure, the preset state is that the contact plate is in contact with the second conductor;

[0029] The contact plate has a first mounting hole, and the second conductor has a second mounting hole at the position corresponding to the first mounting hole. The two ends of the conductive compression elastic element are respectively disposed in the first mounting hole and the second mounting hole.

[0030] A high-voltage switchgear includes an electrical connection structure, wherein the electrical connection structure is a self-locking electrical connection structure as described in any of the preceding claims.

[0031] The self-locking electrical connection structure provided by this invention features a latching contact finger that remains closed under the elastic force of a reset elastic element. When the first conductor is inserted, it contacts the latching contact finger, causing it to open and allowing the first conductor to continue sliding in until the latching contact finger slides into the slot, achieving self-locking engagement. A conductive compression elastic element is provided between the contact plate and the second conductor. In addition to its elasticity, the conductive compression elastic element also enables electrical connection between the contact plate and the second conductor. When the first conductor is inserted, it gradually approaches the contact plate until it is tightly pressed against it. Under the elastic force of the conductive compression elastic element, the clamping force between the contact plate and the first conductor is maintained. When the latching contact finger slides into the slot, the conductive compression elastic element also provides an elastic force to the first conductor, enhancing the compressive force between the first conductor and the latching contact finger. This increased friction enhances the structural stability.

[0032] When the first conductor and the second conductor need to be unlocked, the first conductor is rotated so that the latching contact finger engages with the unlocking device, causing the latching contact finger to disengage from the slot. Then, the first conductor is pulled out of the second conductor to achieve the electrical connection unlocking and disconnection.

[0033] This invention connects the first and second conductors using snap-fit ​​contacts and a contact plate, increasing the contact area, ensuring current flow at multiple contact points, and improving product safety. Furthermore, the snap-fit ​​contacts and slots work together to achieve self-locking, ensuring connection stability and high reliability. No bolts are required for fastening, and the snap-fit ​​contacts and unlocking device allow for quick unlocking, simplifying the installation and disassembly of the electrical connection. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the self-locking electrical connection structure under unlocking and disconnection conditions provided in an embodiment of the present invention;

[0036] Figure 2 for Figure 1 A magnified view of part A in the image;

[0037] Figure 3 This is a schematic diagram of the self-locking electrical connection structure in the locked state provided in an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of the structure of the first conductor provided in an embodiment of the present invention;

[0039] Figure 5 for Figure 4 AA section diagram;

[0040] Figure 6 This is a diagram showing the fit between the telescopic shaft and the snap-fit ​​finger in an embodiment of the present invention.

[0041] Among them, 100 is the first conductor, 101 is the slot, 102 is the unlocking protrusion, 103 is the unlocking slide, 200 is the second conductor, 201 is the base, 202 is the shielding cover, 203 is the second mounting hole, 300 is the contact plate, 301 is the contact groove, 302 is the first mounting hole, 400 is the snap-on contact finger, 401 is the reset elastic element, 402 is the telescopic shaft, and 500 is the conductive compression elastic element. Detailed Implementation

[0042] The core of this invention lies in providing a self-locking electrical connection structure to simplify the installation and disassembly steps of the electrical connection while ensuring high reliability.

[0043] Another core aspect of this invention is to provide a high-voltage switchgear having the aforementioned self-locking electrical connection structure.

[0044] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the configurations represented in the embodiments below are not limited to those necessary for the solution of the invention described in the claims.

[0045] To solve the problem of achieving both self-locking and easy disassembly, the inventors, through ingenious design, overcame the technical difficulty in this field of choosing between self-locking and easy disassembly, and disclosed a technical solution that can achieve both self-locking and easy disassembly. For specific structural details, please see the detailed implementation method below.

[0046] like Figure 1 As shown, an embodiment of the present invention discloses a self-locking electrical connection structure, including a first conductor 100, a second conductor 200, a snap-fit ​​contact finger 400, a reset elastic element 401, an unlocking device, and a contact plate 300.

[0047] There are at least two snap-fit ​​contacts 400, the specific number of which can be selected according to the current. For ease of understanding, this article uses two as an example. The snap-fit ​​contacts 400 are hinged to the second conductor 200, and the snap-fit ​​contacts 400 can swing along the hinge axis. For ease of understanding, the end that is hinged to the hinge axis is called the hinge end, and the other end is called the free end.

[0048] When the first conductor 100 and the second conductor 200 are electrically connected, the snap-on contact 400 is used to electrically connect and engage with the slot 101 on the outer peripheral surface of the first conductor 100, and the snap-on contact 400 is surrounded by a space for the first conductor 100 to be inserted.

[0049] The reset elastic element 401 is used to make the latching contact 400 grip the slot 101. That is, under the elastic force of the reset elastic element 401, the free end of the latching contact 400 is in a constricted shape, so that when the first conductor 100 is inserted into the second conductor 200, the end of the first conductor 100 first contacts the free end of the latching contact 400, and drives the free end of the latching contact 400 to overcome the elastic force of the reset elastic element 401 and swing along the hinge axis, so that the opening of the free end of the latching contact 400 increases to the point that the first conductor 100 can slide in. As the first conductor 100 continues to be inserted, the latching contact 400 slides relative to the outer wall of the first conductor 100 until the latching contact 400 slides into the slot 101. Under the action of the reset elastic element 401, the latching contact 400 grips the slot 101.

[0050] The reset elastic element 401 can be a torsion spring. In the mechanical field, torsion springs are usually chosen as the reset function element for swinging or rotating parts. The torsion spring is fitted onto the hinge shaft of the snap-fit ​​contact finger 400. One torsion arm of the torsion spring abuts against the snap-fit ​​contact finger 400, and the other torsion arm abuts against the second conductor 200.

[0051] The unlocking device is disposed on the first conductor 100 and located on the path along which the latching finger 400 slides along the slot 101. When the latching finger 400 engages with the unlocking device, it disengages from the slot 101. When it is necessary to unlock the first conductor 100 and the second conductor 200, the first conductor 100 is rotated, causing the latching finger 400 to slide along the slot 101 until it engages with the unlocking device. This increases the opening of the free end of the latching finger 400, allowing it to disengage from the slot 101.

[0052] The contact plate 300 is used for electrical connection with the end of the first conductor 100. To improve contact stability, a contact groove 301 that mates with the end face of the first conductor 100 is provided on the top of the contact plate 300, and it is connected to the second conductor 200 through a conductive compression elastic member 500. When the conductive compression elastic member 500 is compressed to a preset state, the snap-fit ​​contact finger 400 engages with the slot 101. That is, when the first conductor 100 begins to contact the contact plate 300, the snap-fit ​​contact finger 400 has not yet engaged with the slot 101, and the conductive compression elastic member 500 needs to be compressed further until the snap-fit ​​contact finger 400 engages with the slot 101.

[0053] Furthermore, the preset state can be that the contact plate 300 and the second conductor 200 are in contact, or they can be kept at a certain distance. When there is a distance between the contact plate 300 and the second conductor 200, the circuit is made conductive through the conductive compression elastic element 500. In the preset state where the contact plate 300 and the second conductor 200 are in contact, to ensure sufficient space for the conductive compression elastic element 500, a first mounting hole 302 is provided on the contact plate 300, and a second mounting hole 203 is provided on the second conductor 200 at a position corresponding to the first mounting hole 302. The two ends of the conductive compression elastic element 500 are respectively disposed within the first mounting hole 302 and the second mounting hole 203. When the contact plate 300 and the second conductor 200 are in contact, the conductive compression elastic element 500 is accommodated within the space formed by the first mounting hole 302 and the second mounting hole 203. The contact plate 300 and the second conductor 200 being in contact allows for surface contact electrical connection, ensuring current flow at the contact position.

[0054] The conductive compression elastic element 500 has three functions:

[0055] 1. Apply a spring force to the first conductor 100 to enhance the compressive force between the first conductor and the snap-on contact finger 400, thereby increasing the structural stability by enhancing friction.

[0056] 2. When the electrical connection between the first conductor 100 and the second conductor 200 is unlocked, after the latching contact 400 completes the release, it applies a spring force to the first conductor 100, pushing the first conductor 100 to move, making the first conductor 100 easier to remove.

[0057] 3. The conductive compression elastic element 500 has conductive properties, which enables the electrical connection between the contact plate 300 and the second conductor 200, ensuring current flow and preventing the conductor's current-carrying capacity from decreasing due to gaps between the contact plate 300 and the second conductor 200.

[0058] Please combine Figure 1 and Figure 3The self-locking electrical connection structure provided by the present invention has a latching contact 400 that remains closed under the elastic force of the reset elastic member 401. When the first conductor 100 is inserted, the latching contact 400 is contacted and the latching contact 400 is opened, so that the first conductor 100 continues to slide in until the latching contact 400 slides into the slot 101 and achieves self-locking engagement. A conductive compression elastic element 500 is provided between the contact plate 300 and the second conductor 200. In addition to being elastic, the conductive compression elastic element 500 can also realize the electrical connection between the contact plate 300 and the second conductor 200. When the first conductor 100 is inserted, it will gradually approach the contact plate 300 until it is in close contact with the contact plate 300. Under the elastic force of the conductive compression elastic element 500, the clamping force between the contact plate 300 and the first conductor 100 is maintained. When the snap-on contact finger 400 slides into the slot 101, the conductive compression elastic element 500 can also give the first conductor 100 an elastic force, which enhances the squeezing force between the first conductor 100 and the snap-on contact finger 400. By increasing the friction, the structural stability is stronger.

[0059] When the first conductor 100 and the second conductor 200 need to be unlocked, the first conductor 100 is rotated so that the latching contact 400 engages with the unlocking device, causing the latching contact 400 to disengage from the slot. Then, the first conductor 100 is pulled out of the second conductor 200, thus realizing the electrical connection unlocking and disconnection.

[0060] This invention connects the first conductor 100 and the second conductor 200 through the snap-fit ​​contact finger 400 and the contact plate 300, increasing the contact area, ensuring current flow at multiple contact points, and improving product safety. Furthermore, the snap-fit ​​contact finger 400 and the slot 101 work together to achieve self-locking, ensuring connection stability and high reliability. No bolts are required for fastening; self-locking is achieved without bolts. The snap-fit ​​contact finger 400 and the unlocking device work together to quickly unlock, simplifying the installation and disassembly of the electrical connection.

[0061] When applying the self-locking electrical connection structure disclosed in the embodiments of this invention to gas-insulated metal-enclosed switchgear and high-voltage switchgear, the second conductor 200 can be configured with a shield 202. For example, the second conductor 200 includes a base 201 and a shield 202 located around the base 201. Figure 1 As shown, the shielding cover 202 has an approximately cylindrical structure with constricted openings at the top and bottom. The lower part is connected to the base 201, and the upper part has a constricted opening for the insertion of the first conductor 100 to achieve electrical connection. It should be noted that the base 201 and the shielding cover 202 can be an integral structure or fixed by fasteners.

[0062] To shield against electric arcs generated during electrical connections, the snap-on contact finger 400 is hinged to the base 201 and located within the enclosure of the shield 202; the contact plate 300 is mounted on the base 201 via a conductive compression elastic element 500 and is located within the enclosure of the shield 202.

[0063] In a specific embodiment of the present invention, the unlocking device is an unlocking protrusion 102 disposed in the card slot 101 and corresponding one-to-one with the latching finger 400. One-to-one correspondence means that when one unlocking protrusion 102 engages with one latching finger 400, the other unlocking protrusions 102 engage with their corresponding latching fingers 400 respectively.

[0064] The unlocking protrusion 102 smoothly transitions to the bottom of the slot 101 near the latching finger 400. When the first conductor 100 and the second conductor 200 need to be unlocked, the first conductor 100 is rotated, causing the latching finger 400 to move along the slot 101 toward the unlocking protrusion 102 and smoothly transition to a higher position on the unlocking protrusion 102. At this position, the latching finger 400 can more easily disengage from the slot 101. Then, the first conductor 100 is pulled out of the second conductor 200, thus achieving the electrical connection unlocking and disconnection.

[0065] The unlocking protrusion 102 has a smooth transition portion on at least one side near the latching finger 400, so that the latching finger 400 can easily slide to the unlocking protrusion 102 through the smooth transition portion. It should be noted that both sides of the unlocking protrusion 102 can be smoothly connected to the slot 101, so there is no requirement for the rotation direction of the first conductor 100. It can be rotated clockwise or counterclockwise, and the unlocking protrusion 102 can be smoothly slid to the higher position of one of the unlocking protrusions 102 to realize the unlocking and disconnection.

[0066] To facilitate easier unlocking and disconnection of the electrical connection, the height of the unlocking protrusion 102 is further designed to be no less than the depth of the slot 101. The height of the unlocking protrusion 102 can be the same as the depth of the slot 101, meaning the unlocking protrusion 102 is at the same height as the slot wall of the slot 101. This allows the latching finger 400 to easily slide to the outer wall of the first conductor 100 when it moves along the slot 101 towards the unlocking protrusion 102 and smoothly transitions to the unlocking protrusion 102. Alternatively, the height of the unlocking protrusion 102 can be greater than the depth of the slot 101, meaning the unlocking protrusion 102 protrudes beyond the slot wall of the slot 101. This allows the latching finger 400 to easily slide to the outer wall of the first conductor 100 by sliding down a step when it moves along the slot 101 towards the unlocking protrusion 102 and smoothly transitions to the unlocking protrusion 102.

[0067] like Figure 4 and Figure 5As shown, in a specific embodiment of the present invention, the unlocking device may also be an unlocking groove 103 formed on the outer surface of the first conductor 100 and corresponding one-to-one with the latching finger 400. One-to-one correspondence means that when one unlocking groove 103 is engaged with one latching finger 400, the other unlocking grooves 103 are engaged with their corresponding latching fingers 400 respectively.

[0068] The first end of the unlocking groove 103 is connected to the slot 101, and the second end is inclined toward the end where the first conductor 100 contacts the contact plate 300. That is, the unlocking groove 103 is spiral-shaped on the outer surface of the first conductor 100, and the depth of the first end is greater than the depth of the second end, and the unlocking groove 103 smoothly transitions from the first end to the second end.

[0069] When the first conductor 100 and the second conductor 200 need to be unlocked, by rotating the first conductor 100, the latching finger 400 moves along the slot 101 toward the unlocking slide 103 until it slides to the connection between the unlocking slide 103 and the slot 101. Since the unlocking slide 103 is located on the side of the slot 101 closer to the contact plate 300, when the latching finger 400 slides to the connection between the unlocking slide 103 and the slot 101, it is pushed by the elastic force of the conductive compression elastic element 500 to move the first conductor 100 away from the contact plate 300, so that the latching finger 400 slides to the unlocking slide 103. Continuing to rotate the first conductor 100 can make the latching finger 400 continue to slide along the unlocking slide 103. Since the depth of the first end of the unlocking slide 103 is greater than the depth of the second end, the latching finger 400 is gradually opened as it moves from the first end to the second end of the unlocking slide 103. At this position, the latching finger 400 can more easily disengage from the slot 101, and then the first conductor 100 is pulled out of the second conductor 200 to realize the electrical connection unlocking and disconnection.

[0070] To facilitate easier unlocking and disconnection of the electrical connection, the first end of the unlocking slide 103 has the same depth as the slot 101, while the second end of the unlocking slide 103 has a depth of 0. The fact that the first end of the unlocking slide 103 has the same depth as the slot 101 makes it easier for the latching finger 400 to slide into the unlocking slide 103 along the slot 101. The fact that the second end of the unlocking slide 103 has a depth of 0 makes it easier for the latching finger 400 to slide out from the second end of the unlocking slide 103 and onto the outer surface of the first conductor 100.

[0071] To reduce the difficulty of use and avoid misoperation, in a specific embodiment of the present invention, one of the first conductor 100 and the second conductor 200 is provided with a region mark, and the other is provided with an indicator mark. The region mark includes a self-locking mark and an unlocking mark. For ease of understanding, this embodiment takes the example of the first conductor 100 being provided with an indicator mark and the second conductor 200 being provided with a region mark. The indicator mark can be an arrow or pointer-shaped mark; the region mark can be a fan-shaped area supplemented with text, numbers, symbols, etc., to indicate whether the fan-shaped area is a self-locking mark or an unlocking mark.

[0072] When the indicator mark and the self-locking mark correspond, the first conductor 100 and the second conductor 200 are in a self-locking state. When it is necessary to make an electrical connection between the first conductor 100 and the second conductor 200, after aligning the indicator mark on the first conductor 100 with the self-locking mark on the second conductor 200, the first conductor 100 is inserted into the second conductor 200, which allows the latching contact finger 400 to slide into the slot 101 and achieve self-locking engagement.

[0073] When the indicator mark and the unlock mark correspond, the first conductor 100 and the second conductor 200 are in the unlocked state. When it is necessary to unlock the first conductor 100 and the second conductor 200, by rotating the first conductor 100, the indicator mark on the first conductor 100 is aligned with the unlock mark on the second conductor 200, which allows the latching contact 400 to engage with the unlocking device, causing the latching contact 400 to disengage from the slot. Then, the first conductor 100 is pulled out of the second conductor 200, thus realizing the electrical connection unlocking and disconnection.

[0074] To facilitate the insertion of the first conductor 100 into the second conductor 200, in a specific embodiment of the present invention, the insertion end of the first conductor 100 is provided with a guide portion for opening the latching contact finger 400. The insertion end of the first conductor 100 refers to the end where the first conductor 100 is connected to the contact plate 300. The diameter of the end of the guide portion is smaller than the area enclosed by the latching contact finger 400, that is, a larger chamfer is provided at the end of the first conductor 100 to achieve the guiding function.

[0075] like Figure 6As shown, in a specific embodiment of the present invention, the snap-on contact finger 400 can be hinged to the second conductor 200 via a telescopic shaft 402. The second conductor 200 is provided with a hinge support, which has a hinge hole for the telescopic shaft 402 to pass through. The snap-on contact finger 400 has hinge plates clamping both sides of the hinge support. A blind mounting hole is provided on the side of the hinge plate facing the hinge support. Both ends of the telescopic shaft 402 are respectively disposed within the blind mounting holes of the two hinge plates. The telescopic shaft 402 is widely used in watch straps and typically includes a fixed part and telescopic parts mounted at both ends of the fixed part by springs. The telescopic parts can be compressed into the fixed part under the action of the springs to change the length of the telescopic shaft 402. In this embodiment, a telescopic shaft 402 is used for the hinge shaft to facilitate installation. During installation, only both ends of the telescopic shaft 402 need to be squeezed so that the length of the telescopic shaft 402 is less than the distance between the two hinge plates. When the telescopic shaft 402 corresponds to the blind mounting hole, it can be loosened, allowing the telescopic parts at both ends of the telescopic shaft 402 to enter the blind mounting hole. Compared with traditional hinged shafts, since the hinge hole is a blind hole, there is no need for separate limiting. The telescopic shaft 402 can also be limited by installing the blind hole to ensure the stability of the installation.

[0076] In a specific embodiment of the present invention, the conductive compression elastic element 500 is a compression spring with a silver-plated coating, which can enhance the electrical connection between the contact plate 300 and the second conductor 200, ensure current flow, and prevent the conductor's current-carrying capacity from decreasing due to gaps between the contact plate 300 and the second conductor 200.

[0077] This invention also discloses a high-voltage switchgear, including the self-locking electrical connection structure disclosed in the above embodiments, and therefore possesses all the technical effects of the above-mentioned self-locking electrical connection structure, which will not be repeated here.

[0078] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0079] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-locking electrical connection structure, comprising a first conductor (100) and a second conductor (200), characterized in that, Also includes: At least two snap-fit ​​fingers (400) are hinged to the second conductor (200). When the first conductor (100) and the second conductor (200) are electrically connected, the snap-fit ​​fingers (400) are used to electrically engage with the slots (101) on the outer peripheral surface of the first conductor (100). A reset elastic element (401) is used to make the latching finger (400) hold the slot (101). The first conductor (100) is provided with an unlocking device, which is located on the path of the latching finger sliding along the slot. When the latching finger (400) cooperates with the unlocking device, the latching finger (400) disengages from the slot (101). The contact plate (300) is used to electrically connect to the end of the first conductor (100) and to the second conductor (200) through a conductive compression elastic member (500). When the conductive compression elastic member (500) is compressed to a preset state, the snap-fit ​​finger (400) engages with the slot (101). The unlocking device is an unlocking protrusion (102) disposed in the card slot (101) and corresponding one-to-one with the buckle finger (400). The unlocking protrusion (102) is located on the side close to the buckle finger (400) and smoothly transitions to the bottom of the card slot (101).

2. The self-locking electrical connection structure as described in claim 1, characterized in that, The second conductor (200) includes a base (201) and a shield (202) located around the base (201), the snap-on finger (400) being hinged to the base (201) and located within the enclosure of the shield (202); The contact plate (300) is disposed on the base (201) by a conductive compression elastic element (500) and is located within the enclosure of the shield (202).

3. The self-locking electrical connection structure as described in claim 1, characterized in that, The height of the unlocking protrusion (102) is not less than the depth of the card slot (101).

4. The self-locking electrical connection structure as described in claim 1, characterized in that, The unlocking device is an unlocking groove (103) formed on the outer surface of the first conductor (100) and corresponding one-to-one with the buckle finger (400). The first end of the unlocking groove (103) is connected to the slot (101), and the second end is inclined toward the end of the first conductor (100) that contacts the contact plate (300). The depth of the first end of the unlocking slide (103) is greater than the depth of the second end, and the unlocking slide (103) smoothly transitions from the first end to the second end.

5. The self-locking electrical connection structure as described in claim 4, characterized in that, The depth of the first end of the unlocking slide (103) is the same as the depth of the card slot (101), and the depth of the second end of the unlocking slide (103) is 0.

6. The self-locking electrical connection structure as described in any one of claims 1-5, characterized in that, One of the first conductor (100) and the second conductor (200) is provided with a region mark, and the other is provided with an indicator mark. The region mark includes a self-locking mark and an unlocking mark. When the indicator mark and the self-locking mark correspond, the first conductor (100) and the second conductor (200) are in a self-locking state; When the indicator mark and the unlock mark correspond, the first conductor (100) and the second conductor (200) are in the unlocked state.

7. The self-locking electrical connection structure as described in claim 1, characterized in that, The first conductor (100) has a guide portion at its plug end for opening the latching finger (400), and the end diameter of the guide portion is smaller than the area enclosed by the latching finger (400).

8. The self-locking electrical connection structure as described in claim 1, characterized in that, The snap-on contact finger (400) is hinged to the second conductor (200) via a telescopic shaft (402). The hinge support of the second conductor (200) has a hinge hole through which the telescopic shaft (402) passes. The snap-on contact finger (400) has a hinge plate that clamps on both sides of the hinge support. The side of the hinge plate facing the hinge support has a blind mounting hole. The two ends of the telescopic shaft (402) are respectively disposed in the blind mounting holes of the two hinge plates.

9. The self-locking electrical connection structure as described in claim 1, characterized in that, The conductive compression elastic element (500) is a compression spring with a silver-plated coating; and / or The reset elastic element (401) is a torsion spring.

10. The self-locking electrical connection structure as described in claim 1, characterized in that, The preset state is that the contact plate (300) is in contact with the second conductor (200); The contact plate (300) has a first mounting hole (302), and the second conductor (200) has a second mounting hole (203) at the position corresponding to the first mounting hole (302). The two ends of the conductive compression elastic element (500) are respectively disposed in the first mounting hole (302) and the second mounting hole (203).

11. A high-voltage switchgear, comprising an electrical connection structure, characterized in that, The electrical connection structure is a self-locking electrical connection structure as described in any one of claims 1-10.

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