A plug-in device for electrical detection

Abstract

The utility model relates to detection device technical field discloses a kind of electric detection plug device of quick detection, including connecting seat, probe assembly, spring buckle, press line plate and brass connecting piece;The probe assembly includes probe fixed base, needle cover and probe, probe fixed base includes left fixed base and right fixed base, is symmetric and is present preset interval and is located on connecting seat, and the preset interval size is matched with the shell size of the workpiece to be detected;The brass connecting piece is tightly fixed on connecting seat, for detecting shielding layer;Probe is installed at the top of needle cover;Spring buckle is embedded in the inside of connecting seat and is fixed by pin;Press line plate is installed in device tail end by bolt, for pressing and protecting wiring harness.The utility model is used to solve the problem that FAKRA wiring harness is subjected to energized test, due to long-term plugging, resulting in structural deformation and poor durability, so that test result is prone to misjudgment, overall structure is simple, easy to operate and has good adaptability and reliability.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to an electrical plug detection device that can quickly detect electrical plugs. Background Technology

[0002] In the automotive industry, automotive wiring harnesses, as a key component of internal electrical connections, directly determine the safety and stability of the vehicle's overall operation. With the increasing electrification and intelligence of automobiles, the requirements for radio frequency (RF) signal transmission quality from in-vehicle communication systems such as GPS, 5G, and in-vehicle entertainment systems are becoming increasingly stringent. Therefore, during the production and assembly of automotive wiring harnesses, each module must undergo rigorous electrical testing to ensure its electrical performance meets design standards. As a carrier of high-frequency signals, the signal integrity of RF wiring harnesses directly affects the reliability and stability of communication systems, making RF wiring harness testing an indispensable and critical step in the production process. Currently, the industry commonly uses wiring harnesses and interfaces based on the FAKRA (Fakra Automotive Connector) standard for testing. This involves measuring resistance and current through power-on testing or using imaging technology to determine signal transmission quality, thereby verifying whether the wiring harness meets technical requirements.

[0003] Although the FAKRA wire harness testing method is widely used in the industry, it has gradually revealed some significant problems in practical use, limiting further improvements in testing efficiency and reliability. FAKRA connectors themselves have a precise structure, but they are prone to mechanical wear and structural deformation during long-term, high-frequency insertion and removal operations. In particular, slight deformation of the mating pins can accumulate, leading to poor contact or misalignment. When the wire harness under test is in a normal position within the tolerance range, the FAKRA wire harness on the testing equipment may not be able to be smoothly inserted into the electrical test plug due to its own deformation, sometimes requiring additional force from the operator to force it into place. This mechanical mismatch not only easily leads to misjudgments of test results but may also cause damage to the tested workpiece, increasing unnecessary re-inspections and rework, seriously affecting production rhythm and product consistency.

[0004] The underlying causes of these problems lie primarily in the structural design and material selection of existing testing solutions. FAKRA harnesses themselves have a complex structure, requiring extremely high precision in the fit between pins and sockets. However, under frequent use, their materials exhibit significant brittleness and poor fatigue resistance, making them unable to withstand the mechanical stress caused by insertion and removal over extended periods. Simultaneously, the testing device lacks effective guidance and adaptive mechanisms, failing to compensate for insertion difficulties caused by manufacturing tolerances, wear, or alignment errors, further amplifying the instability of the insertion operation. These problems not only lead to increased false positive rates and reduced production efficiency but also drive up production costs due to frequent replacements of the testing harness.

[0005] Therefore, the industry urgently needs a testing device with longer insertion and removal life, better adaptability, and the ability to maintain stable electrical contact quality in order to overcome the limitations of the existing FAKRA testing method and improve the reliability and economy of the testing process. Utility Model Content

[0006] The present invention aims to provide a fast-detection electrical testing plug device to solve the problem that the test results are easily misjudged due to structural deformation caused by long-term plugging and unplugging and poor durability when conducting power-on tests on FAKRA wire harnesses. The overall structure is simple, easy to operate, and has good adaptability and reliability.

[0007] The basic solution provided by this utility model is: an electrical testing plug device that can quickly detect electrical plugs, including a connector, a probe assembly, a spring clip, a wire clamp, and a brass connector; The probe assembly includes a probe holder, a needle sleeve, and a probe. The probe holder includes a left holder and a right holder, which are symmetrically arranged on the connecting seat at a preset interval. The preset interval size matches the outer shell size of the workpiece being inspected. The brass connector is pressed and fixed on the connector for detecting the shielding layer; the probe is installed on the top of the needle sleeve; the needle sleeve and the probe pass through the brass connector and the connector; the spring clip is embedded in the connector and fixed by a pin, for automatically opening and resetting when the workpiece is inserted; The pressure plate is bolted to the end of the device and is used to tighten and protect the wire harness.

[0008] Furthermore, the connector is provided with a mounting groove for mounting a spring clip.

[0009] Furthermore, the brass connector includes a base plate and a connecting cylinder located at the center of the base plate; the connecting cylinder is hollow, and the probe passes through the connecting cylinder.

[0010] Furthermore, the wire clamping plate is provided with a wire harness holding groove for fixing the wire harness.

[0011] Furthermore, it also includes a wiring base, which is connected to the connector by bolts and is used to lead out the detection signal line.

[0012] Furthermore, the spring clip is an automatic reset clip, and its outer side is provided with a contour structure to facilitate docking with the workpiece being inspected.

[0013] Furthermore, the contouring structure includes a wedge-shaped body for contacting the outer shell of the workpiece being inspected.

[0014] Furthermore, the probe is equipped with a spring-back structure to maintain flexible contact when the workpiece being tested is inserted.

[0015] The working principle and advantages of this utility model are as follows: During use, the operator roughly aligns the workpiece to be tested (such as a FAKRA plug) with the inlet of this electrical testing plug device and inserts it along the axial direction. The mounting slot of the connector at the front of the device helps to correct the workpiece angle and guide it into the correct position. During insertion, the protrusion of the workpiece shell presses against the wedge of the spring clip, causing it to spring outward. At the same time, the workpiece terminal contacts and presses the probe, which retracts under pressure but maintains stable contact pressure due to the internal spring-loaded structure. When the workpiece is fully inserted, the spring clip automatically springs back to its original position, and its wedge-loaded surface precisely locks the protrusion of the workpiece, completing mechanical locking and limiting; the workpiece shielding layer and the brass connector of the device simultaneously form a reliable electrical connection. After the workpiece is locked, a stable electrical connection is established, and the operator can then use external testing equipment via the device's wiring base to test various electrical performance parameters of the workpiece. After testing, the operator directly pulls the workpiece out in a straight line. The pulling force causes the spring clip to spring open and unlock again. After the workpiece is completely detached, the probe automatically returns to its extended position under the action of the spring structure, and the latch also returns to its initial state, ready for the next inspection.

[0016] This utility model discloses a rapid detection device for electrical plugs. Its overall structure is simple, easy to operate, and possesses good adaptability and reliability. The key features are: Employing a probe with a spring-loaded structure and flexible contact module end, stable testing can be achieved, ensuring that multiple test values ​​remain within a fixed tolerance range. Specifically, when the workpiece to be tested is inserted, the probe can adapt to minor positional deviations through its spring-loaded structure, ensuring that the physical contact of the electrical connection point is always in an optimal state. This flexible contact mechanism effectively avoids problems such as poor contact, momentary open circuits, or contact resistance jumps caused by misalignment or fluctuations in insertion and extraction force. This allows electrical parameters such as resistance and current obtained from repeated tests to remain stably within a preset tolerance range, greatly improving the reliability and repeatability of test results.

[0017] The use of contoured outer casings (left and right fixed bases) ensures mechanical compatibility and structural stability with standard interfaces, reducing alignment adjustment time during insertion and simplifying operation. Furthermore, the rear end features an automatically resetting spring-loaded latch. During insertion, the workpiece's movement pushes it open via the latch's angled structure. Once the workpiece is in place, the latch automatically resets and locks under spring force, eliminating the need for manual locking or unlocking. All operations are completed in a single linear insertion and removal motion, greatly simplifying the process, shortening the inspection time for individual workpieces, and significantly improving the overall efficiency of large-scale inspection operations on the production line.

[0018] A protective clamping plate is installed at the tail end to form a protective layer on the outside of the tail end. This allows the external pulling force to be borne by the clamping plate rather than being directly transmitted to the fragile solder joints or terminal crimping points. This avoids the tail end wire harness breaking after repeated plugging and unplugging, which could cause potential hazards and helps to improve the service life and reliability of the testing device itself. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the electric inspection plug device for rapid detection according to this utility model, with the workpiece being inspected already inserted. Figure 2 This is an exploded view of the overall structure of an embodiment of the electrical testing plug device for rapid detection according to this utility model (screws, bolts, and nuts are not shown). Figure 3 This is a schematic diagram of the overall structure of an embodiment of the electric inspection plug device for rapid detection according to this utility model, in the state where the workpiece being inspected is not inserted (screws, bolts, and nuts are not shown). Figure 4 This is a cross-sectional view of the overall structure of an embodiment of the electric inspection plug device for rapid detection according to this utility model, with the workpiece being inspected already inserted. Figure 5 This is a cross-sectional view of the probe of an embodiment of the electrical testing plug device for rapid detection according to this utility model; Figure 6 This is a partial structural view of the spring clip of an embodiment of the electrical testing plug device for rapid detection according to this utility model.

[0020] The markings in the accompanying drawings include: wire clamping plate 1, wire harness clamping groove 101, spring clip 2, wedge surface 201, return spring 202, set bolt 203, pin 204, limiting part 205, probe fixing seat 3, left fixing seat 301, right fixing seat 302, connecting seat 4, left fixing hole 401, right fixing hole 402, mounting groove 403, connecting hole 404, wiring base 5, needle sleeve 6, probe 7, spring 701, needle head 702, needle body 703, brass connector 8, base plate 801, connecting cylinder 802, spring anti-bending handle 9, workpiece 10, protrusion 11. Detailed Implementation

[0021] The following detailed explanation illustrates the specific implementation methods: The basic implementation examples are as follows: Figure 1 and Figure 2 As shown: A fast-testing electrical plug device includes a connector 4, a probe assembly, a spring clip 2, a wire clamp 1, a brass connector 8, a wiring base 5, and a spring-loaded anti-bending handle 9.

[0022] The probe assembly includes a probe holder 3, a needle sleeve 6, and a probe 7. The needle sleeve 6 is embedded in the probe holder 3, and the probe 7 is mounted on the top of the needle sleeve 6. The needle sleeve 6 and the probe 7 pass through the brass connector 8 and the connector 4.

[0023] Specifically, the probe 7 is combined with the needle sleeve 6. The tail of the probe 7 is fixed inside the needle sleeve 6, and the front end is provided with a metal-plated contact. The probe 7 is a consumable part and can be removed from the needle sleeve 6 for replacement. The needle sleeve 6 is pressed into the connecting seat 4 by a tight fit. The connecting seat 4 is made of POM plastic.

[0024] The probe 7 is equipped with a spring-loaded structure (in this embodiment, specifically: a spring is provided inside the probe 7, and the needle tip 702 of the probe 7 is connected to the needle body 703 of the probe 7 through the spring 701, such as...). Figure 5 As shown), it has the ability to elastically displace in the axial direction. When subjected to axial pressure, the needle tip 702 of the probe 7 can be compressed and retracted; when the pressure is removed, it automatically resets and extends under the action of the internal spring structure; so as to maintain flexible contact when the workpiece 10 being tested is inserted, and to avoid scratches or indentations on the precision terminals.

[0025] In this embodiment, the workpiece 10 to be tested is a FAKRA plug. The FAKRA plug includes a housing, an interior cavity, and a metal terminal fixed in the cavity. A protrusion 11 for limiting the position is provided on the outer side of the housing.

[0026] The probe holder 3 includes a left holder 301 and a right holder 302, which are symmetrically arranged on the connecting seat 4 at a preset interval. The preset interval size matches the outer shell size of the workpiece 10 being tested.

[0027] Specifically, the connecting seat 4 is symmetrically provided with a left fixing hole 401 and a right fixing hole 402 for connecting the left fixing seat 301 and the right fixing seat 302, respectively. The distance between the left fixing hole 401 and the right fixing hole 402 satisfies the following condition: after the left fixing seat 301 and the right fixing seat 302 are installed, the distance between the relative surfaces of the left fixing seat 301 and the right fixing seat 302 is almost equal to the outer diameter of the outer shell of the workpiece 10 being tested. That is, the left fixing seat 301 and the right fixing seat 302 can be equivalently formed as a guide groove to guide the workpiece 10 being tested to insert into and align with the probe 7.

[0028] The left side of the connector 4 has a mounting groove 403 for mounting the spring clip 2. The shape of the mounting groove 403 matches the shape of the outer shell of the spring clip 2. In this embodiment, the mounting groove 403 is a rectangular opening. The connector 4 has a connecting hole 404 located to the right of the mounting groove 403, and its inner diameter allows the probe 7 and the needle sleeve 6 to pass through unobstructed.

[0029] The brass connector 8 is pressed and fixed onto the connector 4 for detecting the shielding layer. The brass connector 8 includes a base plate 801 and a connecting cylinder 802 located at the center of the base plate 801. The connecting cylinder 802 has a hollow structure, and its inner diameter allows the probe 7 to pass through unobstructed. The brass connector 8 is pressed and fixed to the front end face of the connector 4 by its base plate 801. When the workpiece 10 to be tested, such as FAKRA, with a metal shell is inserted into place, its metal shell will make tight surface contact with the inner wall of the connecting cylinder 802 of the brass connector 8, thereby forming a good electrical connection.

[0030] The spring clip 2 is embedded inside the connecting seat 4 and fixed by the pin 204, and is used to automatically spring open and reset when the workpiece 10 to be inspected is inserted. The spring clip 2 is an automatic reset type clip, and its outer side is provided with a contour structure to facilitate docking with the workpiece 10 to be inspected; the bottom of the spring clip 2 is provided with a limiting part 205. The contour structure includes a wedge-shaped body 201 for contacting the outer shell of the workpiece 10 to be inspected. In this embodiment, as shown... Figure 6 As shown, a return spring 202 is installed inside the spring clip 2, and the return spring 202 is pre-tightened by a set bolt 203 (specifically, the spring clip 2 has a mounting hole, the axis of which is perpendicular to the plane of the wedge body 201, and the set bolt 203 and the return spring 202 are installed in the mounting hole. After the electrical test plug device is assembled, the return spring 202 is positioned opposite to the connecting seat 4). When the spring clip 2 is subjected to an external force (such as being pressed or pushed), the spring clip 2 will overcome the spring pre-tightening force and displace, and the return spring 202 will be further compressed (at the same time, the limiting part 205 will cooperate with the wiring base 5 to prevent the spring clip 2 from displacing excessively). When the external force disappears, the return spring 202 will release elastic potential energy and push the spring clip 2 back to the initial position.

[0031] The wire clamping plate 1 is bolted to the tail end of the device and is used to clamp and protect the wire harness. The wire clamping plate 1 is provided with a wire harness holding groove 101 for fixing the wire harness.

[0032] The wiring base 5 and the connector 4 are connected by bolts and are used to lead out the detection signal line.

[0033] The bottom of the wiring base 5 is also connected to the spring anti-bending handle 9. The center of the spring anti-bending handle 9 is provided with a through hole, through which the detection signal line led out from the wiring base 5 is led out, which can further protect the cable and prevent the cable from being excessively bent.

[0034] In practical applications, the following operational steps are included: The first step is for the operator to confirm that the testing equipment is powered off or in a safe condition. Holding the workpiece 10 to be tested (e.g., a FAKRA wire harness plug), visually inspect its interface and casing for cleanliness and absence of visible damage. Simultaneously, inspect the electrical testing plug device, confirming that key components such as probe 7 and spring clip 2 are free of obstructions and intact. At this point, probe 7 is in its initial upward-extended position; the tail wire harness is securely fixed by the wire clamp 1, as shown below. Figure 3 As shown.

[0035] The second step involves the operator roughly aligning the interface of workpiece 10 with the front inlet of the electrical inspection plug device. Since the left and right fixing seats 301 and 302 at the inlet effectively form a guide groove that naturally matches the outer shell of workpiece 10, precise alignment is not required during initial insertion. Simply bringing them close will allow the guide groove to automatically guide workpiece 10 into the correct angle and orientation, achieving initial coarse positioning and alignment. This design effectively avoids port damage caused by blind insertion.

[0036] Thirdly, the operator applies force smoothly along the axial direction to insert workpiece 10 into the device. Two key actions occur during this process: 1. The inclined surface of workpiece 10's outer shell contacts the wedge-shaped surface 201 on the outside of the spring clip 2. The continuous insertion force is converted into a force that springs the spring clip 2 outward, allowing workpiece 10 to pass smoothly. 2. Almost simultaneously, the tip of the metal terminal inside workpiece 10 begins to make physical contact with the probe 7 tip 702 of the device. As the insertion depth increases, the terminal presses against the probe 7 tip 702, causing it to retract smoothly backward (towards the tail of the device). Because probe 7 has a spring-loaded structure, it can adaptively compensate for the tolerances of both workpiece 10 and the device, and always maintain a stable and reliable elastic contact pressure with the terminal end face, ensuring the continuity of the electrical connection.

[0037] Step four, as Figure 1 and Figure 4 As shown, when workpiece 10 is inserted into place, meaning its physical structure can no longer move inward, the protrusion 11 on the outer shell of workpiece 10 moves to a position aligned with the bottom of the wedge-shaped body 201 of the spring clip 2. At this point, the axial force that forced the spring clip 2 to open disappears, and the spring clip 2 automatically springs back to its original position. The bottom of the wedge-shaped body 201 will, to some extent, restrict the position of workpiece 10, forming a stable mechanical limit. Simultaneously, the metal outer shell of workpiece 10 and the brass connector 8 of the device also achieve large-area surface contact, providing a pathway for shielding layer testing.

[0038] Fifth, after workpiece 10 is reliably placed, a stable electrical connection is established. The operator can then activate external testing equipment (such as a multimeter, network analyzer, or dedicated wire harness tester). The test signal is transmitted through the lead wire from the terminal block 5 at the rear of the device, and then via probe 7 to the terminals of workpiece 10, completing the testing of parameters such as resistance, continuity, impedance, or signal transmission performance. Throughout the testing process, thanks to the constant contact force of probe 7 and the mechanical locking of the latch, the test signal is extremely stable and will not fluctuate due to slight vibrations, thus ensuring the accuracy and repeatability of the test results.

[0039] Step 6: After the inspection is completed, the operator simply needs to hold the outer shell of workpiece 10 by hand and apply a steady pulling force outward along the axial direction. This pulling force acts on the locking surface of the spring clip 2, and the resulting component force will force the spring clip 2 to rotate outward again, thereby releasing the mechanical lock on workpiece 10. Once the clip is released, workpiece 10 can be easily and straight pulled out under the pulling force. During the removal of workpiece 10, the pressure on probe 7 gradually decreases, and its spring-loaded structure will push the needle 702 back to the initial standby position with its head extended forward. After workpiece 10 is completely removed, spring clip 2 will also automatically reset. The entire device requires no manual reset and is immediately ready for the next inspection cycle.

[0040] This embodiment provides a fast-detection electrical testing plug device that can solve the problem of misjudgment of test results when FAKRA wire harnesses are tested for power-on, due to structural deformation caused by long-term plugging and unplugging and their poor durability. The overall structure is simple, easy to operate, and has good adaptability and reliability.

[0041] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A device for rapid detection of electrical plugs, characterized in that, Includes connector, probe assembly, spring clip, wire clamp, and brass connector; The probe assembly includes a probe holder, a needle sleeve, and a probe. The probe holder includes a left holder and a right holder, which are symmetrically arranged on the connecting seat at a preset interval. The preset interval size matches the outer shell size of the workpiece being inspected. The brass connector is pressed and fixed on the connector seat for detecting the shielding layer; the probe is installed on the top of the needle sleeve; the needle sleeve and the probe pass through the brass connector and the connector seat; the spring clip is embedded in the connector seat and fixed by a pin for automatically opening and resetting when the workpiece being tested is inserted. The pressure plate is bolted to the end of the device and is used to tighten and protect the wire harness.

2. The electrical plug detection device with rapid detection capability according to claim 1, characterized in that, The connector is provided with a mounting groove for mounting spring clips.

3. The electrical plug detection device with rapid detection capability according to claim 1, characterized in that, The brass connector includes a base plate and a connecting cylinder located at the center of the base plate; the connecting cylinder is hollow, and the probe passes through the connecting cylinder.

4. The electrical plug detection device for rapid detection according to claim 1, characterized in that, The wire clamping plate is provided with a wire harness holding groove for fixing the wire harness.

5. The electrical plug detection device with rapid detection capability according to claim 1, characterized in that, It also includes a wiring base, which is bolted to the connector and is used to lead out the detection signal line.

6. The electrical plug detection device with rapid detection capability according to claim 1, characterized in that, The spring clip is an automatic reset type clip, and its outer side is provided with a contour structure to facilitate docking with the workpiece being inspected.

7. The electrical plug detection device for rapid detection according to claim 6, characterized in that, The contouring structure includes a wedge-shaped body for contacting the outer shell of the workpiece being inspected.

8. The electrical plug detection device with rapid detection capability according to claim 1, characterized in that, The probe is equipped with a spring-loaded structure to maintain flexible contact when the workpiece being tested is inserted.

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