A duck tongue type quick plug grounding connector

Abstract

The present invention discloses a duck-tongue quick-plug grounding connector, which includes a grounding shell and a metal terminal connected to the grounding shell. The bottom of the metal terminal is equipped with a metal sheet, which fits the grounding shell and is installed on the top surface of the grounding shell to achieve the installation of the metal terminal and the grounding shell. Compared with the existing technology, the metal terminal of the present invention is directly connected to the grounding shell through the metal sheet. Compared with the connection method through copper bus or wire harness in the existing solution, the shell of the present invention does not require a separate opening. The metal sheet and the grounding shell form a complete panel, and there is no need to add an additional sealing ring to achieve the airtight function. It can also more effectively block interference and have a better EMC effect.

Description

Technical Field

[0001] The invention relates to a grounding connector, in particular to a duck-tongue type quick-plug grounding connector. Background Art

[0002] There are three types of grounding schemes for duck tongue quick plug connectors: one is to connect the wires at the tail or to the metal shell connector; the second is to connect the copper busbar at the tail and then connect it to the shell; the third is to connect the copper busbar to the shell through the wiring harness. Figure 3 As shown, the grounding method is to connect the wire to the OT end and then to the shell; Figure 4 The grounding method is to connect the copper busbar directly to the shell or to connect the copper busbar to the shell through a cable adapter. Conventional connectors also achieve grounding by crimping the wiring harness and then connecting it to the shell.

[0003] The current solution has obvious shortcomings. During the process of connecting the connector and the shell, a wiring harness or copper busbar is used for transfer grounding. Electromagnetic radiation will be transmitted outward through the wiring harness or copper busbar, which is not conducive to filtering electromagnetic interference and cannot effectively isolate conducted radiation.

[0004] Therefore, how to design a connector that improves the electromagnetic interference effect is a technical problem that needs to be solved urgently in the industry. Summary of the Invention

[0005] In view of the problem in the prior art that, during the overlapping process of the connector and the shell, a wire harness or a copper bus is used for transfer grounding, electromagnetic radiation will be transmitted outward through the wire harness or the copper bus, which is not conducive to the filtering of electromagnetic interference and cannot effectively isolate the conducted radiation, the present invention discloses a duck-tongue type quick-plug grounding connector.

[0006] The technical solution of the present invention is to propose a duck-tongue type quick-plug grounding connector, which includes a grounding shell and a metal terminal connected to the grounding shell. The bottom of the metal terminal is equipped with a metal sheet, which is in contact with the grounding shell and installed on the top surface of the grounding shell to realize the installation of the metal terminal and the grounding shell.

[0007] Furthermore, it also includes a plastic shell for encapsulating the metal terminal, a fixed boss is provided in the middle of the plastic shell for accommodating the metal terminal, and an elastic hanging arm is provided on the metal terminal to cooperate with the fixed boss, and the metal terminal is fixed to the plastic shell through the elastic hanging arm.

[0008] Furthermore, it also includes a flange plate arranged at the bottom of the plastic shell, the shape of the flange plate matches the metal sheet, and when the metal terminal is fixed on the plastic shell, the flange plate is in contact with the metal sheet.

[0009] Furthermore, matching mounting holes are provided on the flange and the metal sheet, and the plastic housing and the metal terminal are fixed to the grounded housing together through the mounting holes.

[0010] Furthermore, an opening for installing a copper busbar is provided on the top of the plastic housing. The copper busbar is interference-fitted with the opening and connected to the metal terminal to achieve electrical connection between the copper busbar and the metal terminal.

[0011] Furthermore, a metal bushing is installed in the mounting hole of the flange. The metal bushing is a hollow cylinder with a size matching the mounting hole. The metal bushing is engraved in the mounting hole of the flange.

[0012] Furthermore, it also includes a temperature sensor provided on the metal terminal, the temperature sensor is connected to the PCB board inside the grounding shell, and when the temperature of the metal terminal is too high, the duck tongue type quick plug grounding connector is disconnected.

[0013] Furthermore, it also includes an anti-fouling column arranged on the flange.

[0014] Furthermore, it also includes a screw hole provided on the grounding shell, the position of the screw hole is matched with the mounting hole, and the metal sheet and the plastic shell are fixed to the grounding shell together by screws.

[0015] Furthermore, the metal terminal and the metal sheet are fixed by at least one of welding, interference fit, and elastic connection.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. The metal terminals of the connector are directly connected to the housing through metal sheets and mounting screws, eliminating the need for riveting nuts, welding, or crimping wiring harnesses at the tail of the copper bar, which can effectively reduce costs.

[0018] 2. It reduces extra processes such as internal screwing and assembly steps, which can significantly shorten assembly time and save installation costs;

[0019] 3. There is no riveting of copper busbars and crimping of wiring harnesses at the tail, which can effectively improve the electromagnetic interference effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 A schematic diagram showing the interference isolation effect of the present invention and the prior art;

[0023] Figure 3 、 Figure 4 It is a connection diagram of the prior art;

[0024] Among them, 1 is a plastic shell, 2 is a screw, 3 is a metal bushing, 4 is a metal terminal, 5 is a metal sheet, 6 is a copper busbar, 7 is a temperature sensor, and 8 is a grounded shell. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Thus, a feature indicated in this specification is intended to illustrate one of the features of one embodiment of the present invention, rather than to imply that every embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other, not explicitly described, combinations. Thus, unless otherwise noted, the described combinations are not intended to be limiting.

[0027] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0028] At present, there are three kinds of connection schemes for quick plug connectors: one is the metal shell connector after the tail is thrown out; the other is the copper busbar connected to the shell after the tail is out; the third is the copper busbar connected to the shell through the wiring harness; Figure 3 The way to connect the ground is to crimp the OT end of the wire harness and then connect it to the housing, such as Figure 4 The grounding method is to connect the copper busbar directly to the housing or to connect it to the housing via a cable. However, the current solution has obvious disadvantages. During the process of connecting the connector and the housing, the wiring harness or copper busbar is used for grounding. Electromagnetic radiation will be transmitted outward through the wiring harness or copper busbar, which is not conducive to electromagnetic interference filtering and cannot effectively isolate conducted radiation. To address the problems of the existing technology, the concept of the present invention is to connect the metal terminal directly to the grounded housing through a metal sheet, avoiding the connection between the copper busbar or wiring harness and the interior of the housing, thereby improving the electromagnetic interference effect.

[0029] For details, see Figure 1The duck-tongue quick-plug grounding connector proposed in the present invention includes a grounding shell 8 and a metal terminal 4 connected to the grounding shell 8. A metal sheet 5 is assembled at the bottom of the metal terminal 4. The metal sheet 5 is fitted with the grounding shell 8 and is installed on the top surface of the grounding shell 8 by screws 2 to achieve the installation of the metal terminal 4 and the grounding shell 8.

[0030] The metal terminal 4 and the metal sheet 5 are fixed to each other by at least one of welding, interference fit, elastic contact and the like, thereby achieving effective connection between the metal terminal 4 and the metal sheet 5 .

[0031] Furthermore, a plastic housing 1 is provided outside the metal terminal 4 for encapsulating the metal terminal 4. The middle portion of the plastic housing 1 is similar in shape to the metal terminal 4, both being duck-tongue-shaped. A fixing boss is provided on the duck-tongue-shaped protrusion of the plastic housing 1 to accommodate the metal terminal 4. The metal terminal 4 is provided with an elastic hanging arm that cooperates with the fixing boss to secure the metal terminal 4. Once the metal terminal 4 is placed within the fixing boss, the elastic hanging arm secures the metal terminal 4 to the plastic housing 1, completing the encapsulation. The provision of the plastic housing 1 effectively prevents magnetic and electrical leakage problems from the metal terminal 4, thereby improving the overall safety of the device.

[0032] In the present invention, four elastic hanging arms are provided on the metal terminal 4 and are symmetrically distributed on both sides of the metal terminal 4 so that the metal terminal 4 can better contact with the plastic housing 1, which is beneficial to reducing electromagnetic interference.

[0033] Furthermore, a flange is provided at the bottom of the plastic housing 1. The shape and size of the flange match those of the metal sheet 5. Once the metal terminals 4 are encapsulated within the plastic housing 1, the metal sheet 5 and the flange fit together, forming a single unit with the plastic housing 1 for easy installation. Matching mounting holes are provided on the flange and the metal sheet 5. Once the metal terminals 4 are encapsulated within the plastic housing 1, the metal sheet 5 and the plastic housing 1 can be secured to the grounded housing 8 through the mounting holes. Screw holes matching the mounting holes are provided at corresponding positions within the grounded housing 8. Once the screws 2 pass through the mounting holes on the flange and the metal sheet 5, they can be inserted into the screw holes on the grounded housing 8, thereby securing the plastic housing 1 to the grounded housing 8.

[0034] Furthermore, an opening for installing a copper busbar 6 is provided at the top of the plastic housing 1. The copper busbar 6 is interference fit with the opening so as to be installed in the opening and connected to the metal terminals 4 on both sides of the opening to achieve electrical connection between the copper busbar 6 and the metal terminals 4 for current conduction.

[0035] Furthermore, a metal bushing 3 is positioned within the flange's mounting hole. The size of the bushing 3 matches the mounting hole, allowing it to fit snugly within the flange's mounting hole. During installation, screw 2 fits snugly through the hollow portion of the bushing, completing the installation between plastic housing 1 and grounded housing 8. The bushing acts as a gasket to prevent damage to the screw 2. Furthermore, the design of the bushing improves the airtightness between the screw 2 and the mounting hole, enhancing the installation process.

[0036] A temperature sensor 7 is also located on the inner bottom side of metal terminal 4. A cable is connected to temperature sensor 7, which in turn is connected to a PCB inside grounded housing 8. Secured by adhesive, temperature sensor 7 monitors the temperature of metal terminal 4 in real time and transmits the temperature signal to the PCB. If the temperature of metal terminal 4 becomes abnormal, temperature sensor 7 sends an overload signal to the PCB. Upon receiving this signal, the PCB immediately disconnects the entire device's current, halting operation and generating an alarm to promptly resolve the anomaly and resume operation, preventing damage to the device.

[0037] Furthermore, an anti-mistake column is provided on the flange, and the anti-mistake column is installed in the mounting hole together with the metal bushing 3 to prevent the screw 2 from being rotated incorrectly.

[0038] During installation, the metal sheet 5, the metal terminal 4 and the plastic shell 1 can be assembled in advance, and then the plastic shell 1 and the grounding shell 8 can be assembled by screws 2 without additional assembly. This installation method is simpler and more reliable than the method of copper busbar transfer or wiring harness transfer, and the grounding shell 8 does not require a separate mounting hole. The plastic shell 1 and the grounding shell 8 form a complete panel. There is no need to add an additional sealing ring to the connector to achieve an airtight function. It can also more effectively block interference conduction and have a better EMC effect.

[0039] See Figure 2 , which is a schematic diagram of the effect of isolating interference when the present invention is installed on a 40kw OBC. Figure 2 The upper middle curve is the curve of the interference isolation under the wiring harness grounding scheme, and the lower curve is the curve of the interference isolation under the present invention. Figure 2 It can be clearly seen that when the duck-tongue quick-plug grounding connector of the present invention is used, the electromagnetic interference curve is significantly reduced compared to the solution with a connector with a wiring harness. That is, through the design of the present invention, electromagnetic interference can be effectively reduced and a better EMC effect can be achieved.

[0040] Compared with the prior art, the present invention has at least the following beneficial effects:

[0041] 1. The present invention eliminates the need for an extended copper busbar and crimped wiring harness. The metal terminal 4 can be directly connected to the grounding housing 5 through the metal sheet 5 and the mounting screws 2, thereby reducing the need for riveting nuts, welding, or wiring harness adapters at the tail of the copper busbar, thereby effectively reducing costs.

[0042] 2. The present invention eliminates the riveting of the copper busbar and the crimping of the wiring harness, thereby avoiding the problem of electromagnetic radiation being conducted outward through the wiring harness or the copper busbar and improving the electromagnetic interference effect.

[0043] 3. The present invention avoids the impact of abnormal metal terminal temperature on the entire device through the design of the temperature sensor, thereby improving overall safety.

[0044] The above embodiments are only used to illustrate the specific implementation of the present invention. It should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the concept of the present invention, and these modifications and variations should all fall within the scope of protection of the present invention.

Claims

1. A duck tongue type quick plug grounding connector, comprising a grounding type housing, characterized in that: It also includes a metal terminal connected to the grounding housing, wherein a metal sheet is assembled on the bottom of the metal terminal, and the metal sheet is in contact with the grounding housing and is mounted on the top surface of the grounding housing to achieve the installation of the metal terminal and the grounding housing; It also includes a plastic shell for encapsulating the metal terminal, wherein a fixing boss for accommodating the metal terminal is provided in the middle of the plastic shell, and an elastic hanging arm is provided on the metal terminal to cooperate with the fixing boss, and the metal terminal is fixed to the plastic shell through the elastic hanging arm; An opening for installing a copper busbar is also provided on the top of the plastic housing. The copper busbar is interference-fitted with the opening and connected to the metal terminal to achieve electrical connection between the copper busbar and the metal terminal. It also includes a flange plate arranged at the bottom of the plastic shell. The shape of the flange plate matches the metal sheet. When the metal terminal is fixed on the plastic shell, the flange plate is in contact with the metal sheet.

2. The duck tongue quick-plug grounding connector according to claim 1, characterized in that: Matching mounting holes are provided on the flange and the metal sheet, and the plastic shell and the metal terminal are fixed on the grounding shell together through the mounting holes.

3. The duck tongue quick-plug grounding connector according to claim 2, characterized in that: A metal bushing is also installed in the mounting hole of the flange. The metal bushing is a hollow cylinder with a size matching that of the mounting hole. The metal bushing is patterned in the mounting hole of the flange.

4. The duck tongue quick-plug grounding connector according to claim 1, characterized in that: It also includes a temperature sensor provided on the metal terminal, which is connected to the PCB board inside the grounding shell and disconnects the duckbill type quick plug grounding connector when the temperature of the metal terminal is too high.

5. The duck tongue quick-plug grounding connector according to claim 2, characterized in that: It also includes an anti-fouling column arranged on the flange.

6. The duck tongue type quick plug grounding connector according to claim 2, characterized in that: It also includes screw holes provided on the grounding shell, the positions of the screw holes are matched with the mounting holes, and the metal sheet and the plastic shell are fixed to the grounding shell together by screws.

7. The duck tongue quick-plug grounding connector according to claim 1, characterized in that: The metal terminal and the metal sheet are fixed by at least one of welding, interference fit, and elastic connection.

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