CN216529494U - Electrical test device for a vehicle - Google Patents

Abstract

The disclosure relates to an electrical test device for a vehicle, comprising a communication module, a plug-in module and at least one transmission line connected between the communication module and the plug-in module, the plug-in module comprising a housing and a plug-in recess in the housing, an insulating substrate is arranged in the insertion concave part, a first insertion pin array and a second insertion pin array are arranged on the insulating substrate, each insertion pin is electrically connected with the communication module through the at least one transmission line, the insulating substrate is provided with a positioning pin extending forwards along the plugging direction and an insulating guide structure sleeved on the positioning pin, accommodating channels are provided in the insulating guide structure, the positioning pins are received in the corresponding accommodating channels, the insulative guide structure is disposed between the first and second columns of plug pins and separates the first and second columns of plug pins from each other. This advantageously increases the detection safety and improves the plug-in reliability.

Description

Electrical test device for a vehicle

Technical Field

The present disclosure relates to the field of electrical detection, and more particularly to an electrical detection device for a vehicle, in particular for a motor vehicle.

Background

The electrical inspection process is an integral part of vehicle manufacture. Electrical detection is related to the integrity, product performance and reliability of the entire vehicle system. To implement electrical detection, electrical detection devices may be typically used that may collect electrical parameters of various functional modules within the vehicle to evaluate the performance of the functional modules.

However, in the vehicle manufacturing process, the electrical detection apparatus needs to be responsible for a large number of vehicles. Therefore, the plug of the electrical detection apparatus needs to be repeatedly plugged into and unplugged from the vehicle. Such repeated plugging and unplugging may result in damage to the plug of the electrical detection device, such as bending or even breaking of the pins. Furthermore, due to factors such as design tolerances, the plug stability of the electrical detection device may not be guaranteed with respect to the numerous vehicle sockets, thereby causing undesired shaking or wobbling of the plug of the electrical detection device on the vehicle sockets, causing damage to the plug, such as bending or even breaking of the pins.

On one hand, damage to the plug of the electrical detection device may cause inaccurate electrical detection and even failure to implement the electrical detection, thereby significantly affecting the manufacturing efficiency and increasing the detection cost; on the other hand, the short circuit may be caused, the electrical equipment in the vehicle is damaged, for example, the fuse box of the vehicle is burnt, and the quality of the vehicle is affected.

SUMMERY OF THE UTILITY MODEL

It is an object of the present disclosure to provide an electrical inspection apparatus for a vehicle that overcomes at least one of the deficiencies of the prior art.

According to the present disclosure, an electrical test device for a vehicle is provided, which comprises a communication module, a plug-in module for plugging onto the vehicle, and at least one transmission line connected between the communication module and the plug-in module, wherein the plug-in module comprises a housing and a plug-in recess in the housing, an insulating substrate is mounted in the plug-in recess, a first plug-in pin row and a second plug-in pin row arranged at a distance from the first plug-in pin row are provided on the insulating substrate, each plug-in pin of the first plug-in pin row and the second plug-in pin row is electrically connected to the communication module via the at least one transmission line, wherein at least one positioning pin extending forward in a plug-in direction and an insulating guide structure sleeved on the at least one positioning pin are provided on the insulating substrate, receiving channels are provided in the insulating guide structure, the at least one positioning pin being received in a corresponding receiving channel, the insulating guide structure being arranged between the first and second rows of plug pins and separating the first and second rows of plug pins from each other.

The electrical detection device according to some embodiments of the present disclosure advantageously increases electrical detection safety and improves plug reliability between the electrical detection device and a vehicle.

In some embodiments, a first via column and a second via column arranged at a distance from the first via column are provided on the insulating substrate.

In some embodiments, a plurality of plugging pins extending forward in the plugging direction are provided in the first through-hole row to form the first plugging pin row, and a plurality of plugging pins extending forward in the plugging direction are provided in the second through-hole row to form the second plugging pin row.

In some embodiments, the insulating guide structure has an extension in the plugging direction that is greater than an extension in the plugging direction of each of the first and second rows of plugging pins.

In some embodiments, an extension of the at least one positioning pin in the plugging direction is greater than an extension of each of the first and second plugging pin columns in the plugging direction.

In some embodiments, the insulating guide structure is detachably disposed on the insulating substrate.

In some embodiments, an adhesive layer is provided between the at least one positioning pin and the corresponding receiving channel, and the adhesive layer enables the insulation guide structure to be fixedly sleeved on the at least one positioning pin.

In some embodiments, the at least one alignment pin is received flush within the insulative guide structure.

In some embodiments, two positioning pins extending forward in the plugging direction are provided on the insulating substrate, each on opposite side portions of the insulating substrate.

In some embodiments, a latching device for latching onto a vehicle is mounted on the housing of the plug-in module.

In some embodiments, the housing of the plug-in module is designed as a stepped housing, which comprises a first housing section and a second housing section which is recessed relative to the first housing section and delimits the plug-in recess.

In some embodiments, a receiving recess is provided on the first housing section and a latching recess is provided on the second housing section, the latching device comprising a fastening section received on the receiving recess and a latching section which can be latched on the latching recess and can be released from the latching recess and latched onto the vehicle.

In some embodiments, the insulating guide structure is configured as a plastic guide block and/or the at least one positioning pin is configured as a plastic positioning pin.

In some embodiments, at least one reinforcing rib is provided within or on the insulating guide structure.

In some embodiments, the transmission line is configured as a coaxial cable.

In some embodiments, the insulating guide structure has a form fit portion with a corresponding form fit portion on the locating pin.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic block diagram of an electrical detection system according to some embodiments of the present disclosure.

FIG. 2 is an assembled perspective view of an electrical test assembly including an electrical test receptacle on a vehicle and a plug-in module of an electrical test device plugged into the electrical test receptacle, according to some embodiments of the present disclosure.

Fig. 3 is a schematic perspective view of a plug-in module of the electrical detection apparatus of fig. 2.

Fig. 4 is an exploded view of the jack module of fig. 3.

Fig. 5 is a perspective view of the plug-in module of fig. 3 with the insulating guide structure removed.

Fig. 6 is a top view of the plug-in module of fig. 3.

Note that in the embodiments described below, the same reference numerals are used in common between different drawings to denote the same portions or portions having the same functions, and a repetitive description thereof will be omitted. In some cases, similar reference numbers and letters are used to denote similar items, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

For convenience of understanding, the positions, sizes, ranges, and the like of the respective structures shown in the drawings and the like do not sometimes indicate actual positions, sizes, ranges, and the like. Therefore, the present disclosure is not limited to the positions, dimensions, ranges, and the like disclosed in the drawings and the like.

Detailed Description

The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the disclosure. It should be understood, however, that the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, the embodiments described below are intended to provide a more complete disclosure of the present disclosure, and to fully convey the scope of the disclosure to those skilled in the art. It is also to be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

It is understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present disclosure. All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art unless otherwise defined. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

When an element is referred to herein as being "on," attached to, "" connected to, "coupled to," or "contacting" another element, etc., it can be directly on, attached to, connected to, coupled to or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly attached to," directly connected to, "directly coupled to," or "directly contacting" another element, there are no intervening elements present. In this context, one feature being disposed "adjacent" another feature may refer to one feature having a portion that overlaps or is above or below the adjacent feature.

In this document, reference may be made to elements or nodes or features being "connected" together. Unless expressly stated otherwise, "connected" means that one element/node/feature may be mechanically, electrically, logically, or otherwise joined to another element/node/feature in a direct or indirect manner to allow for interaction, even though the two features may not be directly connected. That is, "connected" is intended to include both direct and indirect joining of elements or other features, including joining using one or more intermediate elements.

In this document, spatial relationship terms such as "upper", "lower", "left", "right", "front", "back", "high", "low", and the like may describe one feature's relationship to another feature in the drawings. It will be understood that the terms "spatially relative" encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, features originally described as "below" other features may be described as "above" other features when the device in the figures is inverted. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationships may be interpreted accordingly.

Herein, the term "a or B" includes "a and B" and "a or B" rather than exclusively including only "a" or only "B" unless otherwise specifically stated.

In this document, the term "exemplary" means "serving as an example, instance, or illustration," and not as a "model" that is to be reproduced exactly. Any implementation exemplarily described herein is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, the disclosure is not limited by any expressed or implied theory presented in the preceding technical field, background, disclosure, or detailed description.

In this document, the term "substantially" is intended to encompass any minor variations due to design or manufacturing imperfections, tolerances of the devices or components, environmental influences and/or other factors. The term "substantially" also allows for differences from a perfect or ideal situation due to parasitics, noise, and other practical considerations that may exist in a practical implementation.

In addition, "first," "second," and like terms may also be used herein for reference purposes only, and thus are not intended to be limiting. For example, the terms "first," "second," and other such numerical terms referring to structures or elements do not imply a sequence or order unless clearly indicated by the context.

It will be further understood that the terms "comprises/comprising," "includes" and/or "including," when used herein, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, and/or components, and/or groups thereof.

Next, an electrical inspection apparatus for a vehicle according to the present disclosure will be described in detail with reference to the accompanying drawings. In the present disclosure, a vehicle is to be understood broadly, which may be, for example, a vehicle (e.g., a car, a bus, a truck, a van), a train, a boat, a motorcycle, a tricycle, a two-wheeled vehicle, or other movable conveyance. The following embodiments will be described taking a vehicle as an example.

Fig. 1 illustrates a schematic block diagram of an electrical detection system 100 according to some embodiments of the present disclosure. The electrical detection system 100 may comprise an electrical detection platform 10, an electrical detection device 20 and an electrical detection socket 30 integrated on the vehicle, a so-called OBD socket. The electrical detection device 20 may include a communication module 22 (or transceiver module), a plug-in module 24 for plugging onto a vehicle, and at least one transmission line 26, such as a coaxial cable, connected between the communication module 22 and the plug-in module 24. The electrical test device 20 can establish a wireless connection with the remote electrical test platform 10 by means of the communication module 22 in order to receive test instructions, for example in the form of test signal sequences, from the electrical test platform 10 and to transmit corresponding test instructions to the plug-in module 24 via the corresponding transmission line 26. As shown in fig. 2, an assembled perspective view of an electrical test assembly consisting of a plug-in module 24 and an electrical test socket 30 is shown. To make an electrical connection between the electrical detection device 20 and the vehicle, the plug-in module 24 of the electrical detection device 20 needs to be plugged into an electrical detection receptacle 30 on the vehicle. This allows corresponding test commands to be transmitted further to the vehicle-mounted function module 32 to be tested, for example various electrical devices integrated in a vehicle electrical system (for example, a high-voltage vehicle electrical system, a low-voltage vehicle electrical system, a bus system, etc.). The in-vehicle function module 32 may generate a corresponding feedback signal in response to the detection instruction. The feedback signal may be transmitted to the communication module 22 via the plug-in module 24 and the corresponding transmission line 26. The communication module 22 may then transmit the corresponding feedback signal back to the remote electroscopic platform 10 via the wireless connection. The electrical detection platform 10 can then evaluate the electrical performance of the on-board function module 32 based on the returned feedback signal.

Referring next to fig. 3-6, electrical detection devices according to some embodiments of the present disclosure are described in further detail. Fig. 3 shows a schematic perspective view of the plug-in module 24 of the electrical detection device 20. Fig. 4 shows an exploded view of the plug-in module 24. Fig. 5 shows a perspective view of the plug-in module 24 after removal of the insulating guide 60. Fig. 6 shows a plan view of the plug-in module 24.

Referring to fig. 3 and 6, the plug-in module 24 may include a housing 51 and a plug recess 52 within the housing 51. An insulating substrate 53, for example, a plastic substrate, may be mounted in the insertion recess 52. In some embodiments, the insulating substrate 53 may be integrally formed with the housing 51 of the plug-in module 24. In some embodiments, the insulating base plate 53 may be fastened to the inner wall of the housing 51 by a possible fixing means, such as a form-fit and/or friction-fit. The insulating base plate 53 divides the plug-in module 24 into two regions, the region which is referred to from the insulating base plate 53 toward the front in the plugging direction being able to be defined as the above-mentioned plug-in recess 52.

A first via column and a second via column arranged at a distance from the first via column may be provided on the insulating substrate 53. The first and second via rows may each have a plurality of vias 54 that are spaced apart and side-by-side in sequence. A plurality of plug pins 57 extending forward in the plugging direction may be provided in the first through-hole row to form a first plug pin row 55. A plurality of plug pins 57 extending forward in the plugging direction may be provided in the second through-hole row to form a second plug pin row 56. The respective plug pins can extend from the rear of the insulating base plate 53 through the respective through holes in the plugging direction toward the front. The mating recesses 52 should be open to allow the corresponding mating pins 57 to be mated to the sockets on the electrical test socket 30. Furthermore, the respective plug pins 57 may be electrically connected to the respective transmission lines 26 at the back of the insulating substrate 53. Thereby electrically connecting each jack pin 57 of the first and second jack pin columns 55, 56 with the communication module 22 via the at least one transmission line 26.

As shown in fig. 4, 6, in the present embodiment, the first plug pin column 55 may have a plurality, for example 5, plug pins 57, and the second plug pin column 56 may correspondingly have a plurality, for example 5, plug pins 57. In some embodiments, one of the jack pins of the first jack pin row 55 and an opposite one of the jack pins in the second jack pin row may be configured as a pair of detection pins to detect a predetermined electrical parameter. As an example, the plug-in module 24 may have a pair of CAN bus sense pins (one plug-in pin senses a high level on the CAN bus and the corresponding plug-in pin senses a low level on the CAN bus). In some embodiments, one of the socket pins of the first or second socket pin columns 56 may serve as a separate detection pin. As an example, the ethernet bus activation pin may be present as a separate detection pin. It should be understood that not every via is provided with a plug pin, i.e. some vias may be unoccupied.

However, when the respective plug pins of the electrical detection apparatus 20 are repeatedly plugged into and unplugged from the electrical detection socket 30, the plug pins 57 of the electrical detection apparatus 20 may be frequently bent or even broken. Furthermore, due to design tolerances and the like, undesired shaking or wobbling of the plug-in module 24 of the electrical detection apparatus 20 on the electrical detection socket 30 may also cause bending, or even breaking, of the plug-in pins 57. Bending and even breaking of the plug pins 57 may cause inaccurate electrical detection and even failure to implement electrical detection, thereby significantly affecting manufacturing efficiency and increasing detection cost; on the other hand, the short circuit may be caused, the electrical equipment in the vehicle is damaged, for example, the fuse box of the vehicle is burnt, and the quality of the vehicle is affected.

For this purpose, as shown in fig. 3, the present disclosure proposes the idea of providing an insulating guide structure 60, for example in the form of a plastic guide block, extending forward in the plugging direction on the insulating base plate 53, such that said insulating guide structure 60 is arranged between the first plugging pin row 55 and the second plugging pin row 56 and such that the first plugging pin row 55 and the second plugging pin row 56 are spaced apart from one another. The insulation guide structure 60 can prevent short circuit between the plug pins in the first plug pin row 55 and the plug pins in the second plug pin row, thereby improving the safety of the detection system; on the other hand, the insulating guide structure 60 may have a shape adapted to the guide groove in the electrical detection socket 30, improving the plug-in stability of the plug-in module 24 on the vehicle, preventing unnecessary shaking or chattering.

As shown in fig. 3, at least one positioning pin 62, for example a plastic positioning pin 62, is provided on the insulating base plate 53, which pin extends forward in the plugging direction. The insulating guide structure 60 may be sleeved over the at least one alignment pin 62. To this end, receiving channels 64 may be provided in the insulating guide structure 60, and the at least one positioning pin 62 may be received in the corresponding receiving channel 64.

In some embodiments, the positioning pins 62 may be integrally formed with the insulating base plate 53. In some embodiments, the positioning pins 62 may be secured to the insulating substrate 53 by fasteners, adhesives, and/or scarf joints. The insulating guide structure 60 has an extension in the plugging direction which is greater than the extension in the plugging direction of each of the first plug pin row 55 and the second plug pin row 56. Furthermore, the extension of the at least one positioning pin 62 in the plugging direction may be greater than the extension of each of the first and second plugging pin rows 55, 56 in the plugging direction. In some embodiments, the at least one alignment pin 62 may be received flush within the insulating guide structure 60. In addition, the at least one positioning pin 62 may further strengthen the strength of the insulating guide structure 60. In some embodiments, at least one reinforcing rib may be further disposed in or on the insulation guide structure 60 to further reinforce the strength of the insulation guide structure 60 and increase the durability of the insulation guide structure 60.

In some embodiments, more than two rows of plug pins may be provided on the plug module 24, and a corresponding alignment pin 62 and insulating guide structure 60 are provided between each two rows of plug pins 57 to electrically isolate the two adjacent rows of plug pins 57.

As shown in fig. 4, the insulating guide structure 60 is detachably provided on the insulating base plate 53 by caulking (caulking direction is shown by an arrow). That is, the insulating guide structure 60 can be retrofitted into the plug-in module 24 of the electrical detection device 20, for example, when needed. This not only saves costs, but also improves efficiency. It is further advantageous that when the design of the electrical detection socket 30 on a vehicle changes or when there is a difference in the electrical detection sockets 30 on different vehicles, only the adapted insulating guide structure 60 needs to be replaced, and the electrical detection apparatus 20 can be reused.

In order to achieve a stable connection between the insulating guide structure 60 and the positioning pin 62, the insulating guide structure 60 may be sleeved on the at least one positioning pin 62 by glue injection. That is, an adhesive layer may be disposed between the at least one positioning pin 62 and the corresponding receiving channel 64, and the adhesive layer may fixedly sleeve the insulation guide structure 60 on the at least one positioning pin 62.

In other embodiments, the insulating guide 60 may also be fastened in the plug recess 52 by means of fasteners and/or possibly suitable fastening means such as a scarf joint. For example, the insulating guide 60 can have a form fit, a corresponding form fit being provided in the positioning pin 62 and/or the plug recess 52, and a reliable fixing can also be achieved by the form fit of the insulating guide 60 with the corresponding form fit.

As shown in fig. 5, in the present embodiment, two positioning pins 62 extending forward in the plugging direction may be provided on the insulating base plate 53. The two positioning pins 62 may be respectively located on side portions of the insulating base plate 53 that are opposed to each other. For this purpose, corresponding receiving channels 64 are provided on the mutually opposite side portions of the insulating guide 60. It will be appreciated that more positioning pins 62 may be provided on the insulating base plate 53, for example a row of positioning pins 62 having substantially the same extension as the row of through holes. Accordingly, a corresponding row of receiving channels 64 may also be provided on the insulating guide structure 60.

With continued reference to fig. 2, a snap-in device 70 for snapping onto the electrical test socket 30 of the vehicle may also be mounted on the housing 51 of the plug-in module 24. In the present exemplary embodiment, the housing 51 of the plug-in module 24 can be designed as a stepped housing 51. The housing 51 may comprise a first housing 51 section and a second housing 51 section defining a plugging recess 52, which is recessed with respect to the first housing 51 section. A receiving recess may be provided on the first housing 51 section and a snap-in recess may be provided on the second housing 51 section. The clip 70 comprises a fixing portion 72 received in the receiving recess and a clip portion 74 that can be clipped onto the clip recess. The catching portions can be disengaged from the catching recesses and caught to the catching recesses 76 of the electrical inspection socket 30 of the vehicle. The provision of the snap-fit device 70 further stabilizes the plugging reliability of the plug-in module 24 with the electrical test socket 30.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. The various embodiments disclosed herein may be combined in any combination without departing from the spirit and scope of the present disclosure. Those skilled in the art will also appreciate that various modifications might be made to the embodiments without departing from the scope and spirit of the present disclosure.

Claims (15)

1. Electrical test device for a vehicle, characterized in that it comprises a communication module, a plug-in module for plugging onto the vehicle and at least one transmission line connected between the communication module and the plug-in module,

wherein the plug-in module comprises a shell and a plug-in concave part in the shell, an insulating substrate is arranged in the plug-in concave part, a first plug-in pin row and a second plug-in pin row which is arranged at a distance from the first plug-in pin row are arranged on the insulating substrate, each plug-in pin in the first plug-in pin row and the second plug-in pin row is electrically connected with the communication module through the at least one transmission line,

the insulating substrate is provided with at least one positioning pin extending forwards along the plugging direction and an insulating guide structure sleeved on the at least one positioning pin, wherein an accommodating channel is formed in the insulating guide structure, the at least one positioning pin is received in the corresponding accommodating channel, and the insulating guide structure is arranged between the first plugging pin column and the second plugging pin column and separates the first plugging pin column and the second plugging pin column from each other.

2. The electrical inspection apparatus for a conveyance according to claim 1, wherein a first through-hole row and a second through-hole row arranged at a distance from the first through-hole row are provided on the insulating substrate, a plurality of plug pins extending frontward in the plugging direction are provided in the first through-hole row to form the first plug pin row, and a plurality of plug pins extending frontward in the plugging direction are provided in the second through-hole row to form the second plug pin row.

3. The electrical inspection apparatus for a vehicle of claim 1, wherein an extension dimension of the insulative guide structure in the plugging direction is greater than an extension dimension of each of the first and second rows of plug pins in the plugging direction.

4. The electrical inspection apparatus for a vehicle of claim 1, wherein an extension dimension of the at least one alignment pin in the plugging direction is greater than an extension dimension of each of the first and second rows of plug pins in the plugging direction.

5. The electrical inspection apparatus for a conveyance of claim 1, wherein the insulating guide structure is detachably provided on the insulating base plate.

6. The electrical inspection apparatus for a vehicle of claim 5, wherein an adhesive layer is disposed between the at least one locating pin and the corresponding receiving channel, the adhesive layer fixedly sleeving the insulating guide structure on the at least one locating pin.

7. The electrical inspection apparatus for a vehicle of any one of claims 1 to 6, wherein the at least one alignment pin is received flush within the insulated guide structure.

8. The electrical inspection apparatus for a conveyance according to any one of claims 1 to 6, wherein two positioning pins extending forward in the plugging direction are provided on the insulating base plate, the two positioning pins being respectively provided on side edge portions of the insulating base plate that are opposed to each other.

9. An electrical testing device for a vehicle according to any one of claims 1 to 6, wherein a snap-in means for snapping onto a vehicle is mounted on the housing of the plug-in module.

10. Electrical test device for a vehicle according to claim 9, characterized in that the housing of the plug-in module is designed as a stepped housing, which comprises a first housing section and a second housing section which is recessed relative to the first housing section and delimits a plug-in recess.

11. The electrical inspection device for conveyance according to claim 10, wherein a receiving recess is provided on the first housing section and a clamping recess is provided on the second housing section, the clamping means including a fixing portion received in the receiving recess and a clamping portion capable of clamping in the clamping recess, the clamping portion being capable of disengaging from the clamping recess and clamping to the conveyance.

12. The electrical detection apparatus for a vehicle of any one of claims 1 to 6, wherein the insulating guide structure is configured as a plastic guide block and/or the at least one locating pin is configured as a plastic locating pin.

13. An electrical testing device for a vehicle according to any of claims 1 to 6 wherein at least one reinforcing bar is provided within or on the insulating guide structure.

14. The electrical detection apparatus for a vehicle of any one of claims 1 to 6, wherein the transmission line is configured as a coaxial cable.

15. Electrical detection device for vehicles according to claim 5, characterized in that the insulating guide structure has a form fit, a corresponding form fit being provided on the at least one locating pin, respectively.

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