An electrical transfer test box with test protection

Abstract

The application 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, electrode sockets and male plugs. A switching seat is fixedly installed on the surface of the test box main body, a plurality of interface end rows are arranged on the surface of the switching seat, and the interface end rows are used for arranging a plurality of electrode sockets. The electrode sockets are arranged in a matrix arrangement mode on the inner side of the interface end rows and are electrically connected with the output end of the test box main body. In the application, heat-induced variable sheets are arranged between electrode clamping rods, and the heat-induced variable sheets are made of shape memory polyurethane materials, so that when the temperature reaches a set range, the heat-induced variable sheets can automatically contract, the electrode clamping rods are deflected to break the electrical contact, the interface end plays a role in quick power-off protection, and electrical damage or safety hazards caused by overheating can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of electrical test chamber technology, specifically to an electrical transfer test chamber with test protection. Background Technology

[0002] In existing electrical testing systems, control schemes for overheat protection generally suffer from lag. Typically, a temperature control switch is installed on the surface of the control board. When the system operates for a long time or under abnormal load conditions, causing the main electronic components to heat up, the temperature control element detects the surface temperature and triggers a power-off or protection response.

[0003] Taking a common 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 center of the overall heat generation. However, existing temperature control switches are generally installed in a localized area of ​​the control board, especially on the side of surface components, making it difficult to promptly reflect the temperature rise of components at the interface or input path. The temperature control switch only responds when the temperature on the entire surface of the control board rises to a set threshold, resulting in a response delay and making it difficult to cut off abnormal load paths in time. This poses significant safety risks such as burning out components, damaging interfaces, and destroying pins.

[0004] In addition, in traditional electrical plug-in systems, the pin-socket contact structure is mostly passive snap-fit. Once high temperature or abnormal current occurs, due to the lack of an active release mechanism, the pin is prone to problems such as jamming, burning or failure to disconnect, which further increases the difficulty of maintenance and the risk of test accidents.

[0005] In summary, existing technologies have the following significant shortcomings in over-temperature protection:

[0006] Delayed response location: The over-temperature detection location is set on the main body of the control board, which cannot detect temperature abnormalities at the initial stage of the input path such as interface or pin;

[0007] The response mechanism is lagging: protection is only triggered after the main components on the surface of the control board have heated up as a whole, resulting in a significant response delay.

[0008] The structure cannot be actively released: The plug-in structure lacks intelligent or thermal response linkage design, which leads to the risk of continued contact when a fault occurs, affecting safety.

[0009] Therefore, there is an urgent need for an electrical transfer test device with interface temperature response capability and the ability to actively disconnect electrical connections, so as to realize early identification and response to temperature rise in the input path, reduce the thermal impact on core components from the source, and improve the overall safety and reliability of the test platform. Summary of the Invention

[0010] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0011] Therefore, the technical solution adopted by the present invention is as follows: an electrical transfer test chamber with test protection, including a test chamber body, an electrode socket and a male plug that is plugged in thereto. The electrode socket adopts a modular design with strong adaptability. It is equipped with a floating seat linkage mechanism, a locking mechanism, an electrode clamping rod assembly and a thermochromic plate control component. It has stable and reliable response performance under both normal plugging and high temperature protection scenarios.

[0012] In a preferred example, the main body of the test chamber is equipped with an adapter, on which several interface terminal blocks are arranged. Electrode sockets are installed in a matrix in the interface terminal blocks and electrically connected to the output terminal of the test chamber. The male plug has multiple pins at its bottom for inserting into the electrode sockets to complete the electrical connection. Specifically, this configuration makes the test chamber compact and rationally laid out, facilitating multi-channel electrical testing operations.

[0013] In a preferred example, the electrode socket includes a positioning seat, a float seat, a locking rod, an electrode clamping rod, and a thermochromic plate. The locking rod is rotatably mounted inside the positioning seat, and the electrode clamping rod is rotatably mounted on the surface of the float seat. The thermochromic plate is sleeved at the bottom of the electrode clamping rod, and the two are arranged symmetrically in pairs. A tension spring is connected to the bottom of the locking rod, and a clamping lug is provided on its inner side. The electrode clamping rod has electrode contact protrusions and corner protrusions at both ends. The electrode clamping rod is made of conductive metal and is connected to the test chamber circuit. Specifically, this structure can form a stable contact path after the pin is inserted, and also has a trigger-disconnect mechanism.

[0014] In a preferred example, both the positioning seat and the float have insertion holes for the pins to pass through. The locking rod and the electrode clamp are arranged in a cross-shaped symmetrical configuration. Furthermore, the positioning seat, float, and locking rod are all made of insulating material to prevent unintended conductive paths. Specifically, the insertion hole guidance and symmetrical arrangement improve the smoothness of pin insertion and structural stability.

[0015] In a preferred example, a guide rod is mounted on the float and slidably installed in the positioning seat. A suspension spring is connected to the top of the guide rod, which stretches to generate a reverse restoring force when the float descends. Simultaneously, a linkage structure is provided on the inner side of the locking rod, engaging with the inclined surface of the float's outer periphery. When the float descends, the inclined surface presses against the locking rod, causing it to deflect and open, thus releasing the pin insertion path. Specifically, this structure achieves automatic clearance and limiting during pin insertion, improving operational convenience and automation.

[0016] In a preferred example, the bottom of the pin has a tapered structure. During insertion, it contacts the convex portion of the electrode clamp, causing the electrode clamp to deflect and open. Subsequently, the bottom of the tapered portion comes into contact with the top surface of the thermochromic plate and simultaneously contacts the electrode protrusion on the electrode clamp to form electrical conductivity. Specifically, the tapered insertion and multi-point contact improve the stability and reliability of the electrical connection.

[0017] In a preferred example, a counterweight 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, ensuring that it is disengaged from the pin contact position and forming a power-off protection state.

[0018] Specifically, this structure can achieve automatic reset without an electronic control mechanism, offering fast response and high safety.

[0019] In a preferred example, the thermochromic plate is a shape memory polyurethane material component with its two ends movably connected between the bottom ends of the electrode clamps. Under normal conditions, it has an arched structure. When the temperature rises to 55°C to 65°C, it rapidly contracts, pulling the electrode clamps to deflect and achieve the separation of the electrode protrusion from the pin.

[0020] Specifically, this thermally responsive structure can actively disconnect the electrical connection under high-temperature conditions, effectively improving safety during use.

[0021] In a preferred example, the electrode socket adopts a modular design, with multiple socket units that can be independently arranged on the interface terminal block and electrically independently connected to the output of the test chamber, facilitating fault maintenance and expansion deployment.

[0022] Specifically, the modular structure improves system adaptability and simplifies the process of later replacement and maintenance.

[0023] In summary, this invention solves the problems of poor pin insertion, unstable contact, and high risk of overheating in the prior art by setting up 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 insertion, limiting, conduction, and power-off. It has comprehensive advantages such as smooth insertion, fast protection response, and reliable electrical connection, and is suitable for a variety of high-precision testing electrical connection scenarios.

[0024] The beneficial effects achieved by this invention are as follows:

[0025] 1. In this invention, by setting a linkage structure between the float and the locking rod, the float can be automatically driven to press down during the insertion process, thereby opening the locking rod in a linkage manner, thus realizing the rapid insertion of the pin and the release of the channel, significantly improving the convenience of the insertion operation and the adaptive capability of the structural response.

[0026] 2. In this invention, by setting a thermochromic plate between the electrode clamps and using shape memory polyurethane material, the thermochromic plate can automatically shrink when the temperature reaches the set range (55℃-65℃), guiding the electrode clamps to deflect and disconnect the electrical contact, thus playing a role in rapid power-off protection at the interface end, effectively avoiding electrical damage or safety hazards caused by overheating.

[0027] 3. In this invention, after the insertion of the pin is completed, the electrode clamp rod rotates back to its original position under the action of the counterweight. At the same time, the locking rod achieves radial limiting engagement of the pin through the clamping lug, which further enhances the positioning stability and anti-loosening ability of the pin and improves the safety and reliability of the system operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the electrode socket and male plug structure according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the electrode socket and pin engagement state according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of an electrode socket according to an embodiment of the present invention;

[0032] Figure 5 This is an exploded view of the electrode socket according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of a locking rod structure according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the electrode clamp and thermochromic plate structure according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram illustrating the engagement and disengagement states of the pin and electrode clamp in an embodiment of the present invention.

[0036] Figure label:

[0037] 100. Test chamber body; 110. Adapter; 120. Interface terminal block;

[0038] 200. Electrode socket; 210. Positioning seat; 220. Float; 230. Locking rod; 240. Electrode clamping rod; 250. Thermochromic plate; 221. Suspension spring; 231. Clamping lug; 232. Tension spring; 241. Electrode contact protrusion; 242. Angle protrusion; 243. Counterweight;

[0039] 300, male plug; 310, pin. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0041] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0042] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing an electrical transfer test chamber with test protection.

[0043] Combination Figures 1-8 As shown, the present invention provides an electrical transfer test chamber with test protection, comprising a test chamber body 100, electrode sockets 200, and a male plug 300. An adapter 110 is fixedly mounted on the surface of the test chamber body 100. The adapter 110 has multiple interface terminal blocks 120 on its surface for arranging several electrode sockets 200. The electrode sockets 200 are arranged in a matrix inside the interface terminal blocks 120 and are electrically connected to the output terminals of the test chamber body 100.

[0044] As shown in the figure, the bottom surface of the male plug 300 is provided with multiple pins 310 for insertion into the electrode socket 200 to achieve electrical connection. The electrode socket 200 includes a positioning seat 210, a float 220, a locking rod 230, and an electrode clamping rod 240. The positioning seat 210 is used to fix itself in the interface end row 120 and serves as a guide. The float 220 can slide vertically in the positioning seat 210 through a guide rod structure. Its top is provided with a guide rod, which is sleeved in the positioning seat 210. The top end 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 float 220, which is used to drive the float 220 to return to its original position.

[0045] Two locking rods 230 are symmetrically and rotatably 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 side of each locking rod 230 has a clamping lug 231. When the float 220 is pressed down, the locking rod 230 passes through the clamping lug 231 to avoid the insertion pin 310 channel. After the insertion pin 310 is inserted, the locking rod 230 rotates back to its original position and forms a radial limit on the insertion pin 310, preventing vibration or shaking from causing the insertion pin 310 to loosen.

[0046] Two electrode clamps 240 are provided, and are rotatably mounted on the symmetrical plane of the float 220. Each clamp has an electrode contact protrusion 241 at its top and a corner protrusion 242 near its bottom corner. The electrode clamps 240 are made of conductive metal material and are electrically connected to the output terminal of the test chamber body 100 via wires to ensure reliable conduction of electrical signals or power.

[0047] A thermochromic plate 250 is movably connected between the bottoms of the two electrode clamps 240. The thermochromic plate 250 is made of shape-memory polyurethane material and has the ability to maintain an arched shape under normal conditions. The thermochromic plate 250 is in contact with the bottom end of the pin 310 and rapidly contracts when its temperature rises to 55℃~65℃, losing its supporting force and causing the electrode clamps 240 to deflect and separate, thereby disconnecting the electrical contact and realizing the temperature control protection release function. In this embodiment, the thermochromic plate typically adopts a bimetallic structure, composed of two metal layers with different coefficients of thermal expansion, such as: a high-expansion layer (brass, aluminum, etc.) and a low-expansion layer (steel, stainless steel, etc.). When the temperature rises, the high-expansion layer stretches more, causing the bimetallic plate to bend or twist; when the temperature decreases, the high-expansion layer contracts more, and the plate returns to its original position or bends in the opposite direction. That is, the thermochromic plate can automatically recover its arch.

[0048] As shown in the figure, a counterweight 243 is fixedly installed on the outside of the electrode clamp 240. This counterweight provides a reverse deflection force after the thermochromic plate 250 fails or the pin 310 is removed, allowing the electrode clamp 240 to quickly return to its initial closed state. Under normal conditions, the traction torque of the suspension spring 221 is less than the weight of the counterweight 243. The weight of the counterweight 243 maintains contact with the inner side of the locking rod 230, limiting the deflection of the electrode clamp 240. During the insertion of the pin 310, a force is applied to the clamping lugs 231 on the surface of the locking rod 230, causing the locking rod 230 to deflect, releasing the float 220 to descend and unlocking the electrode clamp 240.

[0049] During the insertion of the pin 310, its surface sequentially contacts the electrode contact protrusion 241 at the top and the corner protrusion 242 at the bottom of the electrode clamp 240. Because the bottom of the pin 310 has a tapered structure, it can slide against the corner protrusion 242, causing the electrode clamp 240 to deflect and open, and pushing the float 220 downwards along the guide rod. This, in turn, causes the locking rod 230 to deflect outwards, creating clearance. When the pin 310 continues to penetrate to the bottom and contacts the arched top surface of the thermochromic plate 250, its surface forms reliable electrical contact with the electrode contact protrusion 241, completing the insertion process.

[0050] During the test, the current is conducted through the pin 310 to the electrode clamp 240, and then from the electrode clamp 240 to the output terminal of the test chamber body 100. If the load connected to the pin 310 experiences abnormal temperature rise, causing the thermochromic plate 250 to contract rapidly within the range of 55℃~65℃, the electrode clamp 240 will deflect and separate under the action of the counterweight 243 due to the loss of support from the thermochromic plate 250, and the electrical contact of the pin 310 will be interrupted, thus realizing the temperature control power-off protection function.

[0051] In this embodiment, multiple electrode sockets 200 are modularly arranged on the interface terminal block 120 and can be connected by snap-fit. The electrode clamp rods 240 of each electrode socket 200 are welded with energy-saving terminals and electrically independently connected to the output terminal of the test chamber body 100, which facilitates later replacement, maintenance or expansion and improves the adaptability and maintainability of the equipment.

[0052] Working principle and usage process of this invention:

[0053] This invention provides an electrical transfer test chamber with test protection, mainly comprising: a test chamber body 100, an adapter 110, an interface terminal block 120, an electrode socket 200, and a mating male plug 300. Its core lies in achieving reliable pin 310 conduction and active thermal protection disconnection functions through a multi-stage linkage mechanism within the electrode socket 200 and a release control structure via a thermochromic element 250.

[0054] Insertion linkage mechanism for pins 310: Multiple pins 310 are provided at the bottom of the male plug 300. During insertion, the pins 310 pass through the insertion holes on the positioning seat 210 and the float seat 220, and sequentially contact the electrode contact protrusion 241 at the top end and the corner protrusion 242 at the bottom end of the electrode clamp rod 240, thereby pushing the electrode clamp rod 240 to deflect.

[0055] The float 220 is pressed down to open the locking clamp: the axial force applied by the insertion of the pin 310 pushes the float 220 downward in the vertical direction under the guidance of the guide rod, stretching the suspension spring 221. The outer peripheral surface of the float 220 abuts against the inclined structure on the inner side of the locking clamp rod 230, which drives the locking clamp rod 230 to deflect around its top pivot and open, so that the clamping lug 231 inside the locking clamp rod 230 avoids the insertion pin 310, forming an insertion path.

[0056] Electrical connection establishment: After the pin 310 is inserted into place, its bottom end is in contact with the arched top surface of the thermochromic plate 250, while its surface is in close contact with the electrode contact protrusion 241 of the electrode clamp 240. The electrode clamp 240 is made of conductive metal and is electrically connected to the output terminal of the test chamber body 100, thereby completing the on / off connection between the pin 310 and the output circuit of the test chamber.

[0057] Functions of the limiting and fixing structure: After the pin 310 is inserted, the bottom end of the pin 310 contacts the angular protrusion 242 on the surface of the electrode clamp 240, pushing the electrode clamp 240 to deflect and reset, further improving the tight contact effect between the surface of the pin 310 and the electrode contact protrusion 241 of the electrode clamp 240; under the reset action of the suspension spring 221, the lifting float 220 can further improve the contact effect between the pin 310 and the electrode contact protrusion 241 of the electrode clamp 240, while the clamping lug 231 inside the locking 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.

[0058] Thermal protection mechanism: The thermochromic plate 250 is made of shape memory polyurethane material. Its two ends are movably connected between the bottom ends of the electrode clamp 240. Under normal conditions, it has an arched structure. Within a temperature range of 55℃ to 65℃, it rapidly contracts, pulling the electrode clamp 240 to deflect. This causes the electrode contact protrusion 241 to deflect, lifting the pin 310. Simultaneously, the electrode contact protrusion 241 on the surface of the electrode clamp 240 disengages from the pin 310 surface, achieving rapid power disconnection. The pin 310 forms an electrode connection with the electrode contact protrusion 241. In the event of a circuit fault, Joule heating is generated due to the high resistance at the contact point between the pin 310 and the electrode contact protrusion 241, or due to the pin 310's own resistance. Joule heating is the heat generated when current passes through a conductor due to the conductor's resistance; it is also called resistance heating or ohmic heating. During a short circuit, the current spikes instantaneously, causing Joule heating to accumulate into a large amount of heat in a very short time, resulting in the conductor heating up. During the test, the electrode clamp 240 deforms and bends due to high temperature, and the electrode clamp 240 is further deflected under the action of the counterweight 243. The electrical contact between the pin 310 and the surface of the electrode contact protrusion 241 is broken, which plays the role of over-temperature disconnection protection.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples.

[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrical transfer test chamber with test protection, characterized in that, include: The test chamber body (100), electrode sockets (200) and male plug (300) are provided. An adapter (110) is fixedly installed on the surface of the test chamber body (100), and the surface of the adapter (110) is provided with a plurality of interface end rows (120). 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 chamber body (100). The bottom surface of the male plug (300) is provided with a plurality of pins (310). The electrode socket (200) includes: a positioning seat (210), a float (220), a locking rod (230) rotatably mounted on the inner side of the positioning seat (210), and an electrode clamp (240) rotatably mounted on the surface of the float (220). There are two locking rods (230) and two electrode clamps (240) arranged opposite to each other. The bottom ends of the two electrode clamps (240) are fitted with thermochromic plates (250). The electrode clamps (240) are made of conductive metal and are electrically connected to the output end of the test chamber body (100). The two electrode clamps (240) are respectively provided with an electrode contact protrusion (241) at the top and an angle protrusion (242) near the bottom on their respective inner sides. The bottom end of the pin (310) is tapered and is used to abut against the angle protrusion (242) on the surface of the electrode clamp (240). The end of the angle protrusion (242) is offset from the axis of the connection point between the electrode clamp (240) and the float (220) and is used to push the electrode clamp (240) to generate deflection during the process of being subjected to force on its surface.

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

3. The electrical transfer test chamber according to claim 1, characterized in that, The positioning seat (210) and the float (220) are both provided with insertion holes for the insertion pin (310) to pass through. The two electrode clamps (240) and the two locking clamps (230) are arranged opposite each other in a cross shape. The positioning seat (210), the float (220) and the locking clamps (230) are all insulating material components.

4. The electrical transfer test chamber according to claim 1, characterized in that, The top surface of the float (220) is provided with a guide rod that is slidably sleeved on the inner side of the positioning seat (210) for guiding the float (220) to slide in the vertical direction. A suspension spring (221) is fixedly connected to the top end of the guide rod. One end of the suspension spring (221) is connected to the inner side of the positioning seat (210) for driving the float (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 float (220).

5. The electrical transfer test chamber according to claim 1, characterized in that, A counterweight (243) is fixedly installed on the surface of the electrode clamp (240), and the counterweight (243) is arranged on the opposite outer side of the electrode clamp (240) for deflecting and restoring the electrode clamp (240) after the needle (310) is removed or loosened.

6. The electrical transfer test chamber according to claim 1, characterized in that, The two ends of the thermochromic plate (250) are movably connected to the bottom ends of the two electrode clamps (240), and the thermochromic plate (250) is a shape memory polyurethane material component.

7. The electrical transfer test chamber according to claim 1, characterized in that, The thermochromic plate (250) is arched in normal conditions and is used to fit and contact the bottom end of the pin (310). The thermochromic temperature of the thermochromic plate (250) is 55°C to 65°C.

8. The electrical transfer test chamber according to claim 1, characterized in that, The electrode socket (200) adopts a modular design. Multiple electrode sockets (200) are arranged on the interface terminal block (120) through a universal structure and are electrically independently connected to the output terminal of the test chamber body (100).

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