Electrical switching test box with test protection

Abstract

The invention relates to the technical field of electrical test boxes, in particular to an electrical switching test box with test protection, which comprises a test box main body, an electrode socket and a male plug. Wherein an adapter is fixedly mounted on the surface of the test box main body, and a plurality of interface end rows are arranged on the surface of the adapter and are used for arranging a plurality of electrode sockets. The electrode sockets are installed on the inner side of the interface end row in a matrix arrangement mode and are electrically connected with the output end of the test box body. According to the invention, the thermotropic sheets are arranged between the electrode clamping rods and are made of the shape memory polyurethane material, so that when the temperature reaches a set range, the thermotropic sheets can automatically contract to guide the electrode clamping rods to deflect to break electric contact, and a quick power-off protection effect is achieved at an interface end; and electrical damage or potential safety hazards caused by overheating are effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical test boxes, in particular to an electrical transfer test box with test protection. Background Art

[0002] In existing electrical test systems, the control scheme for overheating protection generally has a hysteresis problem. Usually, a temperature control switch is set on the surface of the control panel. When the system runs for a long time or under abnormal load conditions, causing the main electronic components to heat up, the temperature control element detects its surface temperature and triggers a power outage or protection response.

[0003] Taking a typical test platform as an example, the core components integrated within its control board (such as power modules and logic control chips) are located at the heart of the entire system's heat generation. However, existing temperature switches are typically installed in a localized area of ​​the control board, particularly on the surface component side. This makes it difficult to promptly reflect the temperature rise of components at the interface or in the input path. The temperature switch only responds when the temperature on the entire control board surface reaches a set threshold, resulting in a delayed response and difficulty in promptly shutting off abnormal load paths. This poses significant safety risks, such as component burnout, interface breakdown, and pin damage.

[0004] In addition, in traditional electrical plug-in systems, the pin-socket contact structure is mostly passively snap-in. Once high temperature or abnormal current occurs, the pins are prone to getting stuck, burning, or being unable to disconnect due to the lack of an active release mechanism, further increasing the difficulty of maintenance and the risk of testing accidents.

[0005] In summary, the existing technology has the following significant deficiencies in over-temperature protection: Delayed response location: The overtemperature detection location is set on the control board body, and temperature anomalies cannot be detected at the initial stage of the input path such as the interface or pins; Response mechanism lag: Protection is triggered only after the main components on the control board surface heat up overall, resulting in a significant response delay. The structure cannot be released actively: The plug-in structure lacks intelligent or thermally responsive linkage design, resulting in the risk of continued contact in the event of a failure, affecting safety.

[0006] Therefore, there is an urgent need for an electrical transfer test device that has the structural ability to respond to interface temperature and can actively disconnect electrical connections, so as to achieve early identification and response to temperature rise in the input path, reduce the thermal impact on core components from the source, and improve the safety and reliability of the overall test platform. Summary of the Invention

[0007] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] To this end, the technical solution adopted by the present invention is: an electrical transfer test box with test protection, including a test box main body, an electrode socket and a male plug connected thereto. The electrode socket structure adopts a modular design with strong adaptability. A floating seat linkage mechanism, a locking clamp mechanism, an electrode clamp rod assembly and a thermocouple control component are arranged inside. It has stable and reliable response performance in both normal plug-in and high-temperature protection scenarios.

[0009] In a preferred embodiment, an adapter is provided on the main surface of the test chamber, which houses several rows of interface terminals. Electrode sockets are arranged in a matrix within these rows and electrically connected to the test chamber output terminals. A male plug, with multiple pins at its base, is inserted into the electrode sockets to complete the electrical connection. This configuration results in a compact and well-organized test chamber, facilitating multi-channel electrical testing.

[0010] In a preferred embodiment, the electrode socket includes a positioning seat, a floating seat, a locking clamp rod, an electrode clamp rod, and a thermocouple. The locking clamp rod is pivotally mounted on the inside of the positioning seat, while the electrode clamp rod is pivotally mounted on the surface of the floating seat. The bottom end of the electrode clamp rod is sleeved with the thermocouple, and the two are arranged symmetrically in pairs. A tension spring is connected to the bottom of the locking clamp rod, and a clamping ear is provided on the inside. The electrode clamp rod is provided with electrode contact protrusions and angle protrusions at both ends. The electrode clamp rod is constructed of conductive metal and is connected to the test chamber circuit. Specifically, this structure forms a stable contact path upon insertion of the pin and also provides a trigger disconnection mechanism.

[0011] In a preferred embodiment, both the positioning seat and the floating seat are equipped with pin insertion holes. The locking and electrode clamping rods are arranged symmetrically in a cross pattern. The positioning seat, floating seat, and locking rods are all made of insulating materials to prevent the formation of unintended conductive paths. Specifically, the guided and symmetrical arrangement of the holes enhances smooth pin insertion and structural stability.

[0012] In a preferred embodiment, a guide rod is mounted on the floating seat and slides into the positioning seat. A spring is connected to the top of the guide rod, which stretches when the floating seat descends, generating a reverse reset force. Simultaneously, a locking rod is fitted with a linkage structure on its inner side that engages with an inclined surface on the outer periphery of the floating seat. This inclined surface compresses the locking rod and deflects it open, freeing the pin insertion path. Specifically, this structure achieves automatic clearance and limit engagement during pin insertion, improving operational convenience and automation.

[0013] In a preferred embodiment, the bottom end of the pin has a tapered structure. During insertion, it contacts the corner protrusion of the electrode clamp, pushing the electrode clamp open. The bottom end of the tapered portion then abuts the top surface of the thermocouple and simultaneously contacts the electrode protrusion on the electrode clamp, establishing electrical continuity. Specifically, the tapered guide and multi-point contact improve the stability and reliability of the electrical connection.

[0014] In a preferred example, a counterweight block is provided on the outside of the electrode clamp rod, which is used to drive the electrode clamp rod to deflect and reset after the pin is released or the power is cut off, to ensure that it is out of the pin contact position and forms a power-off protection state.

[0015] Specifically, the structure can achieve automatic reset without an electric control mechanism, and has a fast response and high safety.

[0016] In a preferred example, the thermotropic sheet is a shape-memory polyurethane material component, with both ends movably connected between the bottom ends of the electrode clamping rod. It has an arched structure under normal conditions and shrinks rapidly when the temperature rises to 55°C to 65°C, pulling the electrode clamping rod to deflect and move, thereby achieving the separation of the electrode contact protrusion and the pin.

[0017] Specifically, the thermally responsive structure can actively disconnect the electrical connection under high temperature conditions, effectively improving the safety of use.

[0018] In a preferred example, the electrode socket adopts a modular design as a whole, and multiple socket units can be independently arranged in the interface terminal row and form an independent electrical connection with the output end of the test box, which is convenient for fault maintenance and expansion deployment.

[0019] Specifically, the modular structure improves the system's adaptability and simplifies the subsequent replacement and maintenance process.

[0020] In summary, the present invention solves the problems of poor pin connection, unstable contact and high risk of overheating in the prior art by setting a floating seat linkage structure, an electrode clamping structure and a thermal release mechanism, combined with the automatic response of the entire process of pin structure introduction, limiting, conduction and power off. It has the comprehensive advantages of smooth plugging, fast protection response, reliable electrical connection, etc., and is suitable for a variety of high-precision test electrical connection scenarios.

[0021] The beneficial effects achieved by the present invention are: 1. In the present invention, by setting a linkage structure between the floating seat and the locking clamp rod, the pin can automatically drive the floating seat to press down during the insertion process, and the locking clamp rod is linked to open, thereby realizing the rapid introduction of the pin and the release of the channel, which significantly improves the convenience of the plug-in operation and the adaptability of the structural response.

[0022] 2. In the present invention, a thermotropic sheet is provided between the electrode clamps and is made of shape-memory polyurethane material. When the temperature reaches a set range (55°C-65°C), the thermotropic sheet automatically contracts, guiding the electrode clamps to deflect and disconnect the electrical contact. This provides a rapid power-off protection at the interface, effectively avoiding electrical damage or safety hazards caused by overheating.

[0023] 3. In the present invention, after the pin is inserted, the electrode clamping rod rotates and resets under the action of the counterweight block. At the same time, the locking clamping rod realizes radial limiting cooperation with the pin through the clamping ear, further enhancing the positioning stability and anti-loosening ability of the pin, and improving the safety and reliability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic structural diagram of an electrode socket and a male plug according to an embodiment of the present invention; Figure 3 This is a structural diagram of the electrode socket and the pin in the engaged state according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of an electrode socket according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the exploded structure of an electrode socket according to an embodiment of the present invention; Figure 6 A schematic diagram of the locking clamp rod structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the electrode clamping rod and the thermotropic sheet according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the engaged state and the protective disengaged state of the pin and the electrode clamp rod according to an embodiment of the present invention.

[0025] Reference numerals: 100, test chamber body; 110, adapter; 120, interface terminal row; 200, electrode socket; 210, positioning seat; 220, floating seat; 230, locking clamp rod; 240, electrode clamp rod; 250, thermocouple; 221, hanging spring; 231, clamping ear; 232, tension spring; 241, electrode contact protrusion; 242, corner protrusion; 243, counterweight; 300, male plug; 310, pin. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0027] It is to be understood that these descriptions are illustrative only and are not intended to limit the scope of the invention.

[0028] An electrical transfer test box with test protection provided by some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] Combine Figures 1-8 As shown, the present invention provides an electrical transfer test box with test protection, comprising a test box body 100, an electrode socket 200, and a male plug 300. A transfer base 110 is fixedly mounted on the surface of the test box body 100. The transfer base 110 is provided with a plurality of interface terminal rows 120 for arranging a plurality of electrode sockets 200. The electrode sockets 200 are mounted in a matrix arrangement inside the interface terminal rows 120 and are electrically connected to the output terminals of the test box body 100.

[0030] As shown in the figure, the bottom surface of the male plug 300 is provided with a plurality of pins 310 for inserting into the electrode socket 200 to achieve electrical connection. The electrode socket 200 internally includes a positioning seat 210, a floating seat 220, a locking clamp rod 230, and an electrode clamp rod 240. The positioning seat 210 is used to be fixed in the interface terminal row 120 and acts as a guide. The floating seat 220 can slide vertically within the positioning seat 210 via a guide rod structure. The top of the floating seat 220 is provided with a guide rod that is sleeved within the positioning seat 210. The top of the guide rod is connected to a suspension spring 221. One end of the suspension spring 221 is connected to the inside of the positioning seat 210, and the other end is connected to the top of the floating seat 220, which is used to drive the floating seat 220 to return to its original position.

[0031] There are two locking clamping rods 230, each symmetrically mounted on the inner wall of the positioning seat 210. Their upper ends are rotatably connected to the positioning seat 210, and their lower ends are connected to a tension spring 232. The inner sides of the locking clamping rods 230 are provided with clamping ears 231. When the floating seat 220 is pressed downward, the locking clamping rods 230 use the clamping ears 231 to clear the passage of the pin 310. After the pin 310 is inserted, the locking clamping rods 230 rotate back to their original position and form a radial limit for the pin 310, preventing the pin 310 from loosening due to vibration or shaking.

[0032] Two electrode clamps 240 are rotatably mounted on symmetrical surfaces of the floating base 220. Electrode contact protrusions 241 are located on the top, and corner protrusions 242 are located near the corners of the bottom. The electrode clamps 240 are made of conductive metal and are electrically connected to the output terminals of the test chamber body 100 via wires, ensuring reliable transmission of electrical signals or power.

[0033] A thermocouple 250 is flexibly connected between the bottoms of the two electrode clamps 240. Made of shape-memory polyurethane, it maintains an arched shape under normal conditions. The thermocouple 250 contacts the bottom of the pin 310 and rapidly contracts when its temperature rises to 55°C–65°C, losing its support and pulling the electrode clamps 240 apart, thereby breaking electrical contact and achieving a temperature-controlled release. The thermocouple in this embodiment typically employs a bimetallic structure, composed of two metal layers with different thermal expansion coefficients, such as a high-expansion layer (such as brass or aluminum) and a low-expansion layer (such as steel or stainless steel). When the temperature rises, the high-expansion layer expands further, causing the bimetallic strip to bend or twist. When the temperature drops, the high-expansion layer contracts further, causing the strip to return to its original position or bend in the opposite direction. This means the thermocouple automatically returns to its original arched shape.

[0034] As shown in the figure, a counterweight 243 is fixedly mounted on the outside of the electrode clamp 240. This provides a reverse deflection force to quickly restore the electrode clamp 240 to its initial closed state after the thermocouple 250 fails or the pin 310 is removed. Under normal conditions, the traction torque of the suspension spring 221 is less than the weight of the counterweight 243. The counterweight 243 maintains contact with the inner side of the locking rod 230 through the weight of the spring, keeping the inner side in contact with the outer side of the electrode clamp 240 and limiting deflection of the electrode clamp 240. During insertion of the pin 310, the spring applies force to the ears 231 on the locking rod 230, causing it to deflect, releasing the floating seat 220 to descend and unlocking the electrode clamp 240.

[0035] During insertion, the pin 310's surface sequentially contacts the electrode contact protrusion 241 at the top of the electrode clamping rod 240 and the angle protrusion 242 at its lower end. Due to the conical structure of the bottom end of the pin 310, it slides against the angle protrusion 242, pushing the electrode clamping rod 240 to deflect and open. This pushes the floating seat 220 downward along the guide rod, which in turn causes the locking rod 230 to deflect outward, clearing the way. When the pin 310 continues to penetrate and contact the arched top surface of the thermocouple 250, its surface establishes reliable electrical contact with the electrode contact protrusion 241, completing the insertion process.

[0036] During the test, current is conducted through pins 310 to electrode clamp 240, and then from electrode clamp 240 to the output terminal of test chamber body 100. If the load connected to pins 310 experiences an abnormal temperature rise, causing thermocouple 250 to rapidly contract within the range of 55°C to 65°C, electrode clamp 240, without the support of thermocouple 250, deflects and separates under the action of counterweight 243, interrupting electrical contact with pins 310 and achieving temperature-controlled power-off protection.

[0037] In this embodiment, multiple electrode sockets 200 are arranged on the interface end row 120 in a modular structure, and a snap-on connection can be selected. The electrode clamp rod 240 of each electrode socket 200 is welded with a power-saving terminal on the surface and is electrically and independently connected to the output end of the test box body 100, which is convenient for later replacement, maintenance or expansion, and improves the adaptability and maintainability of the equipment.

[0038] The working principle and use process of the present invention: The present invention provides an electrical transfer test box with test protection, comprising: a test box body 100, an adapter 110, an interface terminal block 120, an electrode socket 200, and a mating male plug 300. The core of the system lies in the multi-stage linkage mechanism within the electrode socket 200 and the control release structure of the thermocouple 250, which achieves reliable conduction of the pins 310 and active thermal protection disconnection.

[0039] Insertion of the pins 310 into the linkage mechanism: The male plug 300 is provided with multiple pins 310 at the bottom. During insertion, the pins 310 pass through the sockets on the positioning seat 210 and the floating seat 220 and sequentially contact the electrode contact protrusions 241 at the top and the angle protrusions 242 at the bottom of the electrode clamping rod 240, pushing the electrode clamping rod 240 to deflect.

[0040] The floating seat 220 is pressed downward, causing the locking clamp to open. The axial force exerted by the insertion of the pin 310 pushes the floating seat 220 downward vertically, guided by the guide rod, stretching the suspension spring 221. The outer surface of the floating seat 220 abuts the inclined surface on the inner side of the locking clamp rod 230, which in turn causes the locking clamp rod 230 to deflect and open about its top axis, allowing the clamping ears 231 inside the locking clamp rod 230 to clear the pin 310, creating an insertion path.

[0041] Electrical connection established: Once inserted, pin 310's bottom end abuts the arched top surface of thermocouple 250, while its surface makes close contact with electrode contact protrusion 241 of electrode clamp 240. Electrode clamp 240, made of conductive metal, is electrically connected to the output terminal of test chamber body 100, thus establishing a connection between pin 310 and the test chamber's output circuit.

[0042] Function of the limiting and fixing structure: After the pin 310 is inserted, the bottom end of the pin 310 contacts the corner protrusion 242 on the surface of the electrode clamping rod 240, pushing the electrode clamping rod 240 to deflect and reset, further improving the close contact effect between the surface of the pin 310 and the electrode contact protrusion 241 of the electrode clamping rod 240; under the reset action of the suspension spring 221, the floating seat 220 is lifted to further improve the contact effect between the pin 310 and the electrode contact protrusion 241 of the electrode clamping rod 240, and the clamping ear 231 inside the locking clamping rod 230 forms a radial limit on the pin 310 after it enters, preventing the pin 310 from loosening due to vibration or shaking during use.

[0043] Thermal protection mechanism: The thermosensitive plate 250 is made of shape-memory polyurethane. Its two ends are flexibly connected between the bottom ends of the electrode clamp 240. Normally, it has an arched structure. Within the temperature range of 55°C to 65°C, it rapidly contracts, pulling the electrode clamp 240 in a deflecting motion. This deflects the electrode contact 241, lifting the pin 310. The electrode contact 241 on the surface of the electrode clamp 240 also breaks contact with the pin 310, achieving rapid power outage. The pin 310 makes contact with the electrode contact 241, establishing an electrode connection. During a circuit fault, the high resistance of the pin 310 at the contact with the electrode contact 241, or the inherent resistance of the pin 310, generates Joule heating. Joule heating is the heat generated by the resistance of a conductor when current flows through it. It is also called resistive heating or ohmic heating. During a short circuit, the current surges instantaneously, causing Joule heating to accumulate into a large amount of heat in a very short time, resulting in heating of the conductor. During the test, when the electrode clamp rod 240 is deformed and bent due to high temperature, the thermotropic plate 250 is further deflected by the counterweight 243, and the electrical contact between the pin 310 and the surface of the electrode contact protrusion 241 is disconnected, thereby providing over-temperature disconnection protection.

[0044] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An electrical transfer test box with test protection, characterized in that: include: A test box body (100), an electrode socket (200) and a male plug (300), wherein a transfer seat (110) is fixedly mounted on the surface of the test box body (100), and a plurality of interface end rows (120) are provided on the surface of the transfer seat (110), the electrode sockets (200) are arranged in a matrix inside the interface end rows (120) and are electrically connected to the output end of the test box body (100), and a plurality of pins (310) are provided on the bottom surface of the male plug (300); The electrode socket (200) comprises: a positioning seat (210), a floating seat (220), a locking clamp rod (230) rotatably mounted on the inner side of the positioning seat (210), and an electrode clamp rod (240) rotatably mounted on the surface of the floating seat (220). The number of the locking clamp rod (230) and the number of the electrode clamp rod (240) are both two and they are arranged opposite to each other. The bottom ends of the two electrode clamp rods (240) are sleeved with thermocouples (250). The electrode clamp rods (240) are metal conductive material components and are electrically connected to the output end of the test box body (100).

2. The electrical transfer test box according to claim 1, characterized in that: The top ends of the two locking clamping rods (230) are rotatably connected to the inner side of the positioning seat (210), and the bottom ends thereof are movably connected to a tension spring (232). The inner sides of the two locking clamping rods (230) are provided with clamping ears (231) for contacting the surface of the pin (310).

3. The electrical transfer test box according to claim 1, characterized in that: The surfaces of the positioning seat (210) and the floating seat (220) are both provided with a socket for the insertion of the pin (310), the two electrode clamping rods (240) and the two locking clamping rods (230) are arranged opposite each other in a cross direction, and the positioning seat (210), the floating seat (220) and the locking clamping rods (230) are all insulating material components.

4. The electrical transfer test box according to claim 1, characterized in that: The top surface of the floating seat (220) is provided with a guide rod that is slidably sleeved on the inner side of the positioning seat (210) and is used to guide the floating seat (220) to slide in the vertical direction. The top end of the guide rod is fixedly connected to a hanging spring (221). One end of the hanging spring (221) is connected to the inner side of the positioning seat (210) and is used to drive the floating seat (220) to move upward and close to the bottom surface of the positioning seat (210). The opposite surface of the locking rod (230) is provided with an inclined surface that abuts against the surface of the floating seat (220).

5. The electrical transfer test box according to claim 1, characterized in that: The opposite inner sides of the two electrode clamping rods (240) are respectively provided with an electrode contact protrusion (241) located at the top and an angle protrusion (242) near the bottom. The bottom end of the pin (310) is in a conical structure and is used to abut against the angle protrusion (242) on the surface of the electrode clamping rod (240). The end of the angle protrusion (242) deviates from the axis of the connection point between the electrode clamping rod (240) and the floating seat (220) and is used to push the electrode clamping rod (240) to generate a deflection movement when the surface is subjected to force.

6. The electrical transfer test box according to claim 1, characterized in that: A counterweight (243) is fixedly mounted on the surface of the electrode clamping rod (240), and the counterweight (243) is arranged on the relatively outer side of the electrode clamping rod (240) and is used to deflect and restore the electrode clamping rod (240) after the insertion pin (310) is removed or loosened.

7. The electrical transfer test box according to claim 1, characterized in that: The two ends of the thermotropic sheet (250) are movably connected to the bottom ends of the two electrode clamping rods (240), respectively. The thermotropic sheet (250) is a shape memory polyurethane material component.

8. The electrical transfer test box according to claim 1, characterized in that: The thermovariable sheet (250) is in an arched shape under normal conditions and is used for contacting with the bottom end of the pin (310). The thermovariable temperature of the thermovariable sheet (250) is 55°C to 65°C.

9. The electrical transfer test box according to claim 1, characterized in that: The electrode socket (200) as a whole adopts a modular design, and a plurality of the electrode sockets (200) are arranged on the interface terminal row (120) through a common structure and are electrically and independently connected to the output end of the test box body (100).

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