A drum spring disconnect block connector for circuit interrupt connections

Abstract

The application provides a drum spring type disconnecting block connector, which comprises a disconnecting block plug and a disconnecting block socket. The disconnecting block plug comprises a plug shell, a pin and a drum spring. The drum spring is sleeved outside the pin contact part and comprises a plurality of cutout elastic sheets which are uniformly distributed in the circumferential direction. The disconnecting block socket comprises a socket shell and a contact piece. The contact piece is in a round hole type structure. The inner wall of the socket shell is provided with a guide structure. The plug-in end protrudes from the contact piece in the axial direction to form a contact point leading structure. The socket shell is further provided with a straight-through test hole, the axis of which forms an angle with the axis of the contact piece. The application realizes reliable electrical conduction through the drum spring multi-point annular contact structure. The straight-through test hole realizes in-situ online signal acquisition of the conductive surface of the contact piece without interrupting the circuit, and solves the technical problems of poor contact reliability and inability to detect signals in-situ online of the existing disconnecting block connector.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, and in particular to a drum spring type disconnect block connector for circuit interruption connections. Background Technology

[0002] In the maintenance of electronic test equipment, automated test systems, and communication systems, there is a need for a connector that can accurately simulate circuit disconnection states to perform fault diagnosis, reliability verification, and signal detection. Existing disconnection block connectors of this type consist of two parts: a plug and a socket. The socket is fixed to a printed circuit board or device panel, and the plug is manually inserted and removed to connect or disconnect the circuit. In terms of contact design, existing products generally adopt spring-type or claw-type contact structures, with only a single point or a few points of line contact between the pins and the sockets. In terms of plating process, the contacts of existing similar products usually only use a single-layer gold plating process, with a nickel underlayer thickness between 4.0 and 5.0 μm, and no sealant treatment is applied, resulting in a small number of anti-corrosion barrier layers in the overall plating system. In terms of fixing method, existing products mainly rely on the solder between the pin solder feet and the PCB board for mechanical fixing, and the connector housing does not have an independent mechanical load-bearing structure. In terms of measurement access method, existing products usually do not integrate a dedicated online test interface. If testers need to collect signals, they must first disconnect the connection or strip the wire harness, and then use an external adapter fixture to complete the measurement.

[0003] The aforementioned existing technologies have the following technical problems: First, the contact points formed by the spring-type or claw-type contact structure are few and the contact area is small, which can easily cause momentary disconnection (signal interruption) under vibration or impact environment. After repeated insertion and removal, the contact pressure decreases due to metal fatigue, the contact resistance increases, and the connection reliability deteriorates over time. Second, in terms of plating process, the existing products only use a two-layer structure of single-layer gold plating plus nickel underlayer without applying a sealant. There is a lack of copper underlayer as a transition, and the interfacial bonding force between the gold layer and the nickel layer is weak. Under high-frequency insertion and removal friction and corrosive environments such as salt spray and humidity, the shielding protection effect of the nickel underlayer on the base copper alloy is limited, resulting in an increase in contact resistance with environmental corrosion. Third, the connector housings of existing products are fixed to the PCB board only by solder feet. During repeated insertion and removal, the axial insertion and removal forces and lateral vibration forces act directly on the solder joints. After long-term use, this can easily cause fatigue cracking of the solder joints or poor soldering of the leads, leading to contact failures. Fourth, existing similar products have relatively large insertion and removal forces, making operation difficult in high-density installation environments. Moreover, the outer surface of the housing is mostly a smooth plane, which is prone to slippage when applying force manually, posing a risk of misalignment and damage to the contacts. Fifth, existing products do not have in-situ online testing capabilities. When technicians perform fault diagnosis or signal verification, they must interrupt the normal signal path or perform destructive operations on the wiring harness, which is cumbersome and poses a risk of introducing secondary faults such as poor contact or short circuits. In addition, the rated current of existing narrow-body disconnect block connectors is generally low, making it difficult to meet the high-current transmission requirements of high-voltage environments with surge risks, and there is also a lack of reliable wiring structures suitable for high-current scenarios.

[0004] Therefore, it is necessary to design a drum spring type disconnect block connector that combines high reliable contact performance, long-life composite plating process, electromechanical decoupling fixing structure, low operating force feel, and in-situ online testing capability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a drum spring type disconnect block connector for circuit interruption connection, so as to solve the technical problems of existing disconnect block connectors such as poor contact reliability, insufficient anti-corrosion barrier of composite plating, direct action of insertion and extraction stress on solder joints leading to solder joint fatigue cracking, laborious operation and easy misinsertion, and inability to perform online signal detection without interrupting the circuit.

[0006] The technical solution adopted by this invention to solve its technical problem is: A spring-loaded disconnector connector for circuit interruption includes a disconnector socket and a disconnector plug. The disconnector socket is used for fixed installation on a printed circuit board or device panel. The disconnector plug can be inserted and removed relative to the disconnector socket to realize the connection and disconnection of the circuit. The disconnector plug includes a plug housing, a pin, and a spring. The spring is sleeved on the outside of the contact portion of the pin. The spring includes several slit spring pieces evenly distributed in the circumferential direction. When the disconnector plug is inserted into the disconnector socket, the spring pieces are compressed radially and uniformly inward to form a continuous circumferential pressure on the contact hole wall of the disconnector socket. The spring pieces and the contact are in multi-point uniform contact, thereby establishing a conductive path from the pin to the contact through the spring. The disconnect block socket includes a socket housing and a contact element. The contact element has a round hole structure. The inner wall of the socket housing is provided with a guide structure to guide the disconnect block plug to be accurately aligned when inserted. The insertion end of the socket housing protrudes axially from the contact element, forming a contact-first-electrical-later structure to ensure that mechanical alignment is completed before electrical contact.

[0007] Furthermore, the drum spring includes seven slit spring pieces, which are evenly distributed around the central axis; the base material of the drum spring is a beryllium copper alloy.

[0008] Furthermore, the surfaces of the drum spring, pin, and contact are all subjected to a composite electroplating treatment consisting of a copper base layer, a nickel layer, and a gold layer, with a sealant applied to the outermost layer; wherein the thickness of the copper base layer does not exceed 20 μin, the thickness of the nickel layer is 80–120 μin, and the thickness of the gold layer is 3–5 μin.

[0009] Furthermore, the bottom of the disconnect block socket is provided with soldering pins, which are used to pass through the mounting holes on the printed circuit board or equipment panel and then be fixed by soldering. The soldering pins serve both electrical connection and mechanical support functions.

[0010] Furthermore, a nut is pre-embedded in the socket housing. The nut is used to connect with an external fastener that passes through the printed circuit board or device panel. This allows the nut to bear the mechanical load between the disconnect block socket and the printed circuit board or device panel, so that the transmission path of the mechanical load and the electrical signal path are independent of each other.

[0011] Furthermore, the bottom of the disconnect block socket is also equipped with welding pins, which, together with the nut, are used to double fix the printed circuit board or equipment panel; the axial stress generated during insertion and removal is transmitted to the nut through the socket housing and then dissipated, and the welding pins only serve the function of electrical conduction.

[0012] Furthermore, the socket housing is provided with a test hole, which is a through hole structure that penetrates the socket housing. The axis of the test hole is set at an angle with the axis of the contact element, so that the test probe can directly touch the conductive surface of the contact element through the test hole to realize signal acquisition when the disconnected plug and the disconnected socket are in the connected state.

[0013] Furthermore, the outer surface of the plug housing is provided with an anti-slip groove structure to increase the axial component of the operating force and reduce the lateral component during insertion and removal operations; the insertion force of the disconnected plug does not exceed 8N, and the extraction force is not less than 2.94N.

[0014] Furthermore, both the plug housing and the socket housing are made of insulating polymer material with a flame retardant rating of not less than UL94V-0; the hole spacing of the disconnect block socket is 6mm or 12mm.

[0015] Furthermore, when the hole spacing of the disconnect block socket is 12mm, the creepage distance between adjacent contacts ensures that the withstand voltage performance is not less than 1500VAC, and the bottom of the contact is provided with a solder cup structure, which is a cylindrical open groove for the conductor lead to be inserted and fixed by soldering.

[0016] The technical effects achievable by this invention include the following: By sleeved on the outside of the pin contact portion with a drum spring containing several slit spring pieces evenly distributed along the circumference, when the plug is inserted, the spring pieces are compressed radially and evenly inward, forming a continuous multi-point circumferential pressure on the contact. At the same time, combined with the contact-lead-then-electric structure where the insertion end of the socket housing protrudes axially from the contact, precise alignment and reliable conduction of electrical contact are achieved during insertion and removal. This effectively solves the technical problems of existing spring-type contact structures, such as few contact points, easy signal flickering under vibration, and decreased contact pressure after spring fatigue, significantly improving the contact reliability and service life of the connector.

[0017] By applying a three-layer composite electroplating treatment of copper base layer, nickel layer and gold layer to the surface of drum spring, pin and contact, and applying a sealant to the outermost layer, four anti-corrosion barriers are formed. The copper base layer enhances the adhesion between the plating layer and the substrate, the nickel layer acts as the main barrier layer to block the penetration path of external corrosive media into the substrate, the gold layer provides a chemically inert surface, and the sealant fills the micropores of the plating layer. This effectively solves the technical problems of insufficient anti-corrosion barrier and increased contact resistance due to environmental erosion caused by the existing product's use of only a two-layer plating structure.

[0018] By pre-embedding nuts in the socket housing and using fasteners to fix the printed circuit board or device panel, the axial stress generated during insertion and removal is transmitted through the socket housing to the nuts and dissipated. This achieves the independence of the mechanical load transmission path and the electrical signal path, effectively solving the technical problem that existing products rely solely on solder feet for fixation, resulting in the insertion and removal force acting directly on the solder joints and causing fatigue cracking of the solder joints after long-term use. This significantly extends the overall service life of the connector in high-frequency insertion and removal scenarios.

[0019] By setting a through-hole test hole on the socket housing, the test probe can directly touch the conductive surface of the contact through the test hole. Signal acquisition can be completed when the disconnected plug and the disconnected socket are in a connected state. This effectively solves the technical problem that existing products do not have in-situ online testing function and technicians must interrupt the circuit or perform destructive operations on the wiring harness to measure the signal, which greatly improves the engineering efficiency of on-site fault diagnosis and debugging.

[0020] By setting an anti-slip groove structure on the outer surface of the plug housing, the insertion force is controlled to be no more than 8N and the extraction force is no less than 2.94N. This effectively solves the technical problems of existing similar products, such as large insertion and extraction forces, smooth housing surface that is easy to slip, resulting in difficult operation and damage to contacts due to misalignment. It significantly improves the operating feel and safety in high-density installation environments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the interrupted connector structure in Example 1; Figure 2 This is a schematic diagram of the interrupted connector socket in Example 1; Figure 3 This is a schematic diagram of the drum spring structure in Example 1; Figure 4 This is a schematic diagram of the interrupted connecting socket in Example 4; Figure 5 This is a schematic diagram of the connection between the interrupted connector plug and the interrupted connector socket in Example 4.

[0022] Reference numerals: 1. Connector block plug; 2. Connector block socket; 3. Plug housing; 4. Pin; 5. Fixing block; 6. Drum spring; 7. Socket housing; 8. Insert pin; 9. Injection nut; 10. Anti-slip groove; 11. Welding cup structure. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but these specific embodiments do not limit the scope of protection of the present invention in any way.

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, unless otherwise explicitly limited.

[0028] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0029] Example 1

[0030] As attached Figure 1-3 As shown, a drum-spring type 6 disconnect block connector for circuit interruption includes two main parts: a disconnect block socket 2 and a disconnect block plug 1. The disconnect block socket 2 is fixedly mounted on a printed circuit board (PCB) or device panel. The disconnect block plug 1 can be manually inserted and removed relative to the disconnect block socket 2 to connect and disconnect the circuit. This embodiment uses a narrow-body socket specification with a hole spacing of 6mm, which is suitable for test scenarios with high signal density.

[0031] In this embodiment, the disconnection block plug 1 includes a plug housing 3, a pin 4, a fixing block 5, and a drum spring 6.

[0032] The plug housing 3 is made of high-strength engineering plastic (PA66) with a flame retardant rating of UL94V-0, and features high insulation, high temperature resistance, and dimensional stability. The outer surface of the plug housing 3 has an anti-slip groove structure 10, which allows operators to apply force precisely even in confined cabinet spaces or while wearing gloves, even in high-density installation environments with 6mm spacing. This effectively reduces lateral forces caused by slippage, lowering the risk of pin 4 bending and housing damage.

[0033] Both pin 4 and fixing block 5 are made of Hpb59-1 brass. The surface undergoes a three-layer electroplating process: copper base (thickness within 20 μin), electroless nickel plating (thickness 80–120 μin), and hard gold plating (thickness 3–5 μin). A sealing agent is applied (treatment time 30–60 seconds). After passing a 96-hour neutral salt spray test, no rust spots are visible. The hard gold plating process parameters are: gold concentration in the plating bath 0.3–0.5 g / L, cobalt concentration 0.2–0.4 g / L, pH value 3.8–4.4, current density 0.5–1 A / dm², and temperature 40–50℃. The machining tolerance of pin 4 does not exceed ±0.02 mm, the overall insertion force of the plug does not exceed 8 N, the extraction force is not less than 2.94 N, and the insertion / extraction life is not less than 10,000 cycles.

[0034] The drum spring 6 is a seven-lobed drum-shaped spring structure. The base material is beryllium copper (grade NGKC17200, temper 1 / 2H, thickness δ=0.2mm), and the surface undergoes the same three-layer electroplating process as the pin 4. Seven notched metal lobes are evenly distributed around the central axis and fitted onto the outside of the contact portion of the pin 4. During the insertion of the connector plug 1 into the connector socket 2, the seven lobes are uniformly compressed inward in the radial direction, forming a continuous and stable circumferential pressure on the pin 8, achieving multi-point uniform contact, and keeping the contact resistance stably below 7mΩ. The uniform elastic deformation and reasonable stress distribution of the seven lobes make it less prone to local plastic deformation, giving the connector an ultra-long insertion and extraction life. At the same time, the radial tension generated by the multi-point contact of the drum spring 6 forms a certain frictional holding force in the axial direction, enhancing the connection stability of the plug and socket under vibration.

[0035] In this embodiment, the disconnect block socket 2 includes a socket housing 7, a pin 8, and an injection-molded nut 9.

[0036] The socket housing 7 is integrally injection molded from high-strength engineering plastic with a flame retardant rating of UL94V-0. The inner wall of the socket housing 7 features precision guide grooves and a snap-fit ​​structure to guide the disconnect plug 1 to precise alignment during insertion, enabling blind insertion and preventing damage to contacts due to mis-insertion. The bottom of the socket housing 7 has solder pins for passing through PCB mounting holes and being fixed by reflow soldering, achieving electrical connection with the board-level circuitry. The insertion end of the socket housing 7 protrudes axially from the internal pin 8, forming a contact-first, then-electrical structure. Specifically, the insulating guide portion of the insertion end of the socket housing 7 extends a certain distance axially beyond the conductive end face of the pin 8. When the disconnect plug 1 is inserted, the guide portion of the socket housing 7 first achieves mechanical alignment with the outer wall of the plug housing 3. Before the pin 4 and the spring 6 enter the circular hole of the pin 8, they are axially aligned. Subsequently, the pin 4, carrying the spring 6, continues to advance along the guide groove, and only then does the spring 6's contact enter the circular hole of the pin 8 to establish electrical contact. When pulled out, the spring 6 first disengages from the hole of the insert pin 8 to disconnect the electrical connection, and the guide part of the socket housing 7 is the last to exit, ensuring that the electrical contacts are separated under mechanical guidance and protection, preventing the contacts from being damaged due to misalignment or collision.

[0037] The insert pin 8 has a circular hole structure, and the base material is brass Hpb59-1. Its surface undergoes the same three-layer composite electroplating treatment as the pin 4. The insert pin 8 is embedded inside the socket housing 7, and its circular hole wall forms multi-point circumferential contact with the seven-lobed spring of the drum spring 6. When the disconnect plug 1 is pulled out, the spring of the drum spring 6 automatically springs open radially and retracts, reliably separating from the insert pin 8, ensuring that the circuit is completely disconnected on the socket side. In this embodiment (6mm spacing), the rated current carrying capacity of the insert pin 8 is 1A to 3A.

[0038] The injection-molded nut 9, made of brass and nickel-plated, is embedded in the bottom of the socket housing 7. During installation, the fastening screw passes through the PCB board and is threaded into the injection-molded nut 9. The injection-molded nut 9 separates the mechanical load path from the electrical signal path between the connector and the PCB board: the axial impact stress generated by insertion and removal is first transmitted to the injection-molded nut 9 through the socket housing 7 and then dissipated to the PCB board and chassis by the screw. The solder pins only bear minimal residual strain, fundamentally eliminating the risk of solder joint fatigue cracking or pin breakage.

[0039] In this embodiment, the disconnected block socket 2 body is provided with an in-situ online test hole. The test hole is a through-hole structure that penetrates the socket's insulating shell, and its inner diameter forms a clearance fit with the outer diameter of a preset standardized test probe. The axis of the test hole forms a preset angle with the axis of the internal pin 8 contact, so that the test probe can directly touch the conductive surface of the pin 8 after insertion. The through-hole structure ensures the shortest signal output path, effectively suppressing parasitic inductance and impedance abrupt changes during high-frequency test signal transmission, and realizing lossless signal acquisition without interrupting the normal circuit connection. In this embodiment, the angle between the axis of the test hole and the axis of the pin 8 is 30° to 60°, and the test probe can stably reach the conductive surface of the pin 8 after insertion along this direction.

[0040] When the circuit is normally connected, the operator holds the plug housing 3 and pushes the plug in at a constant speed, aligning it axially with the opening of the socket guide groove. The pilot structure at the tip of the socket housing first completes the mechanical alignment, and then the seven-lobed spring 6 enters the circular hole of the insert pin 8. Driven by radial compression force, it evenly tensions the wall of the insert pin 8 hole, forming a multi-point circumferential stable contact, thus completing the circuit. The insertion force does not exceed 8N, and the feel is tight and smooth. After insertion, the tension of the spring 6 provides axial retaining friction to prevent accidental loosening under vibration.

[0041] When the circuit needs to be disconnected, the operator pinches the anti-slip grooves 10 on both sides of the plug housing 3 and pulls it out axially at a constant speed, with a pulling force of not less than 2.94N. The seven-lobed spring 6 springs radially open as the pin 4 is withdrawn, completely disengaging from the insert pin 8, and the circuit is completely disconnected on the socket side. At this time, testing instruments can be connected to the plug side and the socket side respectively to independently test the signals at both ends of the circuit, realizing the simulation and diagnosis of open circuit faults.

[0042] When online signal detection is required without disconnecting the circuit, the standard test probe is inserted into the test hole. Once the probe reaches the conductive surface of the pin 8, the signal can be read on the test instrument. After completion, the probe is removed without affecting the normal circuit connection. The measurement time is shortened to a few seconds compared to the traditional wire stripping method.

[0043] Example 2

[0044] The only difference between this embodiment and Embodiment 1 is the fixing method. The bottom of the disconnect block socket 2 is provided with several soldering pins. These pins pass through the mounting holes on the PCB board and are fixed by wave soldering or reflow soldering. The pins simultaneously serve the dual functions of electrical connection and mechanical support, and no injection-molded nut 9 is provided. This fixing method has a simple structure and is suitable for miniaturized applications with low insertion and removal frequency and compact installation space. The material selection, surface treatment process, contact principle of the drum spring 6, contact-lead-after-electrical structure, in-situ online test hole design, and operating method of the remaining components are the same as in Embodiment 1, and will not be repeated here.

[0045] Example 3

[0046] The only difference between this embodiment and Embodiment 1 is the fixing method. The disconnect block socket 2 has a pre-embedded injection-molded nut 9. During installation, the fastening screw passes through the PCB board and is threadedly connected to the injection-molded nut 9. All mechanical loads between the connector and the PCB board are borne by the injection-molded nut 9 and the screw. There are no soldering pins for soldering to the PCB board; electrical connections are achieved through other conductor leads. This fixing method completely separates the mechanical fastening path from the electrical signal path, making it suitable for scenarios where there are strict requirements to prevent contact parts from being affected by installation stress. The material selection, surface treatment process, contact principle of the drum spring 6, contact-lead-after-electrical structure, in-situ online test hole design, and operating method of the remaining components are the same as in Embodiment 1. In this embodiment, the electrical connection between the disconnect block socket 2 and the printed circuit board is achieved by soldering conductor leads to the bottom of the insert pin 8. The conductor leads bear the electrical conduction function, while the injection-molded nut 9 and the fastening screw bear all mechanical fixing loads. The two paths are completely separated, and will not be elaborated further here.

[0047] Example 4

[0048] See Figure 4 , Figure 5 The difference between this embodiment and Embodiment 1 lies in the socket specifications. The disconnect block socket 2 adopts a wide-body socket design, with the hole spacing extended to 12mm. The shell width is correspondingly increased, the internal contact spacing is increased, and the creepage distance and electrical clearance between adjacent contacts are significantly improved. The withstand voltage performance can reach more than 1500VAC, making it suitable for high-voltage environments with surge risks.

[0049] In terms of rated current, the wide-body socket allows the use of pin 8 terminals with a larger cross-sectional area, with a rated current of 10A to 20A. The bottom of the pin 8 is provided with a solder cup structure 11, which is a cylindrical open groove. After the conductor lead is inserted, it is fixed by soldering. It can be directly soldered to the PCB board pad or connected to external conductor leads to meet the needs of high current transmission scenarios.

[0050] In terms of heat dissipation performance, the larger housing size creates more space for heat dissipation, effectively reducing heat accumulation when multiple high currents are running simultaneously, and ensuring long-term stable operation of the connector under full load conditions.

[0051] In terms of installation density, the 12mm pitch specification allows for the integration of more than 14 modules side-by-side on a 4U height panel, enabling the on / off control of hundreds of signal channels, fully meeting the engineering requirements of large-scale automatic testing systems for high channel density. The material selection, surface treatment process, drum spring 6-contact principle, contact pilot-guided electrical structure, in-situ online test hole design, dual fixing method, and operating procedure of the remaining components are the same as in Example 1, and will not be repeated here.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A spring-loaded disconnector connector for circuit interruption, comprising a disconnector socket and a disconnector plug, wherein the disconnector socket is for fixed mounting on a printed circuit board or device panel, and the disconnector plug is pluggable relative to the disconnector socket to achieve circuit connection and disconnection, characterized in that, The disconnect plug includes a plug housing, a pin, and a drum spring. The drum spring is sleeved on the outside of the contact portion of the pin. The drum spring includes several slit spring pieces evenly distributed along the circumference. When the disconnect plug is inserted into the disconnect socket, the spring pieces are compressed radially and uniformly inward, forming a continuous circumferential pressure on the contact hole wall of the disconnect socket. The drum spring pieces and the contact pieces form multiple points of uniform contact, thereby establishing a conductive path from the pin to the contact piece through the drum spring. The disconnect block socket includes a socket housing and a contact element. The contact element has a round hole structure. The inner wall of the socket housing is provided with a guide structure to guide the disconnect block plug to be accurately aligned when inserted. The insertion end of the socket housing protrudes axially from the contact element, forming a contact-first-electrical-later structure to ensure that mechanical alignment is completed before electrical contact.

2. A drum-spring type disconnect block connector for circuit interruption connection according to claim 1, characterized in that: The drum spring includes seven slit spring pieces, which are evenly distributed around the central axis; the base material of the drum spring is a beryllium copper alloy.

3. A drum-spring type disconnect block connector for circuit interruption connection according to claim 1, characterized in that: The surfaces of the drum spring, the pin, and the contact are all subjected to a composite electroplating treatment consisting of a copper base layer, a nickel layer, and a gold layer, with a sealant applied to the outermost layer; wherein the thickness of the copper base layer is no more than 20 μin, the thickness of the nickel layer is 80–120 μin, and the thickness of the gold layer is 3–5 μin.

4. A drum-spring type disconnect block connector for circuit interruption connection according to claim 1, characterized in that: The bottom of the disconnect block socket is provided with welding pins, which are used to pass through the mounting holes on the printed circuit board or the device panel and then be fixed by welding. The welding pins serve both electrical connection and mechanical support functions.

5. A drum-spring type disconnect block connector for circuit interruption connection according to claim 1, characterized in that: A nut is pre-embedded in the socket housing. The nut is used to connect with an external fastener that passes through the printed circuit board or device panel. This allows the nut to bear the mechanical load between the disconnect block socket and the printed circuit board or device panel, so that the mechanical load transmission path and the electrical signal path are independent of each other.

6. A drum-spring type disconnect block connector for circuit interruption connection according to claim 5, characterized in that: The bottom of the disconnect block socket is also provided with welding pins, which, together with the nut, are used to double fix the printed circuit board or device panel; the axial stress generated during insertion and removal is transmitted through the socket housing to the nut and then dissipated, and the welding pins only serve the function of electrical conduction.

7. A drum-spring type disconnect block connector for circuit interruption connection according to claim 1, characterized in that: The socket housing is provided with a test hole, which is a through hole structure that penetrates the socket housing. The axis of the test hole is set at an angle to the axis of the contact element, so that the test probe can directly touch the conductive surface of the contact element through the test hole to realize signal acquisition when the disconnected plug and the disconnected socket are in the connected state.

8. A drum-spring type disconnect block connector for circuit interruption connection according to claim 1, characterized in that: The outer surface of the plug housing is provided with an anti-slip groove structure, which is used to increase the axial component of the operating force and reduce the lateral component force during insertion and removal operations; the insertion force of the disconnected plug does not exceed 8N and the extraction force is not less than 2.94N.

9. A drum-spring type disconnect block connector for circuit interruption connection according to any one of claims 1 to 8, characterized in that: Both the plug housing and the socket housing are made of insulating polymer material with a flame retardant rating of not less than UL94V-0; the hole spacing of the disconnect block socket is 6mm or 12mm.

10. A drum-spring type disconnect block connector for circuit interruption connection according to claim 9, characterized in that: When the hole spacing of the disconnect block socket is 12mm, the creepage distance between adjacent contacts ensures that the withstand voltage is not less than 1500VAC, and the bottom of the contact is provided with a solder cup structure, which is a cylindrical open groove for inserting conductor leads and fixing them by soldering.

Images