OTG (On-The-Go) expansion equipment for TYPE-C interface test

Abstract

The utility model provides an OTG (On-The-Go) expansion device for TYPE-C interface test, which comprises a first connector connected with an intelligent terminal TYPE-C interface and a second connector connected with external equipment, and a control switch is arranged between the first connector and the second connector. And the control switch is used for switching the connection relationship between the CC1 pin and the Vconn pin of the OTG expansion equipment and the CC1 pin and the CC2 pin of the TYPE-C interface, so that the TYPE-C interface can detect forward and reverse insertion of the OTG expansion equipment under the condition of not repeatedly plugging and unplugging.

Description

Technical Field

[0001] The utility model belongs to the field of data transmission equipment, and in particular relates to an OTG expansion device for TYPE-C interface testing. Background Art

[0002] When smart terminal products such as mobile phones are performing OTG (On-The-Go) testing, the TYPE-C interface of the smart terminal product is required to detect whether the OTG connector of the external device has been successfully inserted. However, since the TYPE-C interface has a non-directional characteristic, that is, it can achieve electrical connection regardless of whether it is inserted forward or reverse, during the OTG test, the OTG connector needs to be inserted into the TYPE-C interface twice, forward and reverse, respectively. This greatly reduces the efficiency of the test. In each test, two insertion operations are required, which undoubtedly increases the time required for the test. In addition, since the mobile phone is usually powered during the test, repeated insertion of the OTG connector may cause instantaneous changes in current, increasing the risk of damage to external devices such as USB flash drives. Utility Model Content

[0003] In order to solve the above problems in the prior art, the utility model provides an OTG expansion device for TYPE-C interface testing. When the OTG connector is inserted only once, the TYPE-C interface can detect the OTG expansion device in both the positive and negative directions by controlling the switch.

[0004] To achieve the above-mentioned purpose, the utility model provides an OTG expansion device for TYPE-C interface testing, comprising: a first connector connected to the TYPE-C interface of a smart terminal and a second connector connected to an external device, a control switch is provided between the first connector and the second connector, and the control switch is used to switch the connection relationship between the CC1 pin and the Vconn pin of the OTG expansion device and the CC1 pin and the CC2 pin of the TYPE-C interface, so that the TYPE-C interface can detect the forward and reverse insertion of the OTG expansion device without repeated plugging and unplugging.

[0005] Furthermore, the control switch is a single-pole double-throw switch, and the single-pole double-throw switch is arranged on the side wall of the OTG expansion device.

[0006] Furthermore, the control switch includes: contact I, contact II and contact III, contact I is connected to the CC1 pin of the first connector, contact II is connected to the CC1 pin and Vconn pin of the second connector, and contact III is connected to the CC2 pin of the first connector.

[0007] Furthermore, the control switch further comprises: a sliding fork, wherein when the sliding fork slides to the left, the contact I and the contact II are connected; and when the sliding fork slides to the right, the contact II and the contact III are connected.

[0008] Furthermore, the first connector is a TYPE-C plug, and the second connector is a TYPE-C socket or a USB socket.

[0009] Compared with the prior art, the OTG expansion device for TYPE-C interface testing of the utility model mainly has the following advantages:

[0010] The OTG expansion device for TYPE-C interface testing of the utility model is provided with a control switch. Through this control switch, the connection relationship between the CC1 pin and the Vconn pin of the OTG expansion device and the CC1 pin and the CC2 pin of the TYPE-C interface of the intelligent terminal can be flexibly switched, so that the TYPE-C interface can detect the forward and reverse insertion of the OTG expansion device without repeated plugging and unplugging. Through this design, when the OTG expansion device is inserted once, its forward and reverse insertion status can be detected. This not only greatly saves time, but also avoids the wear of the interface that may be caused by repeated plugging and unplugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the Type-C interface of the prior art;

[0012] Figure 2 It is a structural diagram of the OTG interface of the prior art;

[0013] Figure 3 It is a circuit schematic diagram of the OTG expansion device of the utility model;

[0014] Figure 4 This is a circuit schematic diagram of the OTG expansion device of the utility model (a is positive insertion, b is reverse insertion);

[0015] Figure 5 It is a structural schematic diagram of the OTG expansion device of the utility model;

[0016] Figure 6 This is a connection diagram of the OTG expansion device of the first embodiment of the present utility model;

[0017] Description of reference numerals:

[0018] 1. First connector; 2. Second connector; 3. Control switch; 31. Contact I; 32. Contact II32; 33. Contact III; 34. Sliding fork; 4. Smart terminal; 41. TYPE-C interface; 5. OTG adapter cable; 6. External device. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the embodiments of the utility model will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0020] In the related art, when smart terminal products such as mobile phones are performing OTG testing, the TYPE-C interface of the smart terminal product needs to detect whether the OTG connector of the external device has been successfully inserted. However, since the TYPE-C interface has a non-directional characteristic, that is, it can achieve electrical connection regardless of whether it is inserted forward or reverse, during the OTG test, the OTG connector needs to be inserted into the TYPE-C interface twice, forward and reverse. Figure 1-2 As shown, in the prior art, when the OTG connector is inserted into the TYPE-C port in the forward direction, the A1 to A12 pins of the OTG connector are connected to the A1-A12 pins of the TYPE-C interface, and the B1 to B12 pins of the OTG connector are connected to the B1 to B12 pins of the TYPE-C interface. When the OTG connector is inserted into the TYPE-C port in the reverse direction, the A1 to A12 pins of the OTG connector are connected to the B1 to B12 pins of the TYPE-C interface, and the B1 to B12 pins of the OTG connector are connected to the A1 to A12 pins of the TYPE-C port. Since the TYPE-C interface detects the forward and reverse insertion of the external device by detecting which pin of CC1 and CC2 is pulled down by the pull-down resistor. When the OTG connector is inserted into the TYPE-C port in the forward direction, CC1 of the OTG connector is connected to CC1 of the TYPE-C interface, and the TYPE-C interface can detect that CC1 has a pull-down resistor. Similarly, when the OTG connector is inserted into the TYPE-C interface in reverse, CC1 of the OTG connector is connected to CC2 of the TYPE-C interface, and the TYPE-C interface can detect the pull-down resistor on CC2. This requires the OTG connector to be inserted into the TYPE-C interface in both forward and reverse directions to complete the OTG test of the smart terminal product.

[0021] like Figure 5 As shown, this embodiment provides an OTG expansion device for TYPE-C interface testing, including: a first connector 1 connected to the TYPE-C interface 41 and a second connector 2 connected to the external device 6, a control switch 3 is provided between the first connector 1 and the second connector 2, and the control switch 3 is used to switch the connection relationship between the CC1 pin and the Vconn pin of the OTG expansion device and the CC1 pin and the CC2 pin of the smart terminal TYPE-C interface 41, so that the smart terminal TYPE-C interface 41 can detect the forward and reverse insertion of the OTG expansion device without repeated plugging and unplugging.

[0022] Specifically, Figure 3-4As shown, the control switch 3 includes: contact I 31, contact II 32 and contact III 33, contact I 31 is connected to the CC1 pin of the first connector 1, contact II 32 is connected to the CC1 pin and Vconn pin of the second connector 2, and contact III 33 is connected to the CC2 pin of the first connector 1. When the first connector 1 is inserted into the TYPE-C interface 41 of the intelligent terminal 4, and the plug of the external device 6 is inserted into the second connector 2. The control switch 3 connects contact I 31 and contact II 32, CC1 of the TYPE-C interface 41 is connected to CC1 of the second connector 2 of the OTG expansion device, and the TYPE-C interface 41 can detect that CC1 has a pull-down resistor, and it is determined that the OTG expansion device is inserted forward. The control switch 3 connects contact II 32 and contact III 33, CC1 of the second connector 2 of the OTG expansion device is connected to CC2 of the TYPE-C interface 41, and the TYPE-C interface 41 can detect the pull-down resistor on CC2, and it is determined that the OTG expansion device is inserted reversely.

[0023] In the above embodiment, the intelligent terminal 4 may be a mobile phone or a tablet computer, and the external device 6 is preferably a USB flash drive.

[0024] In some embodiments, the first connector 1 is a TYPE-C plug, and the second connector 2 is a TYPE-C socket or a USB socket.

[0025] In the above implementation mode, two embodiments are listed to implement the above technical solution:

[0026] Embodiment 1 discloses an OTG expansion device for TYPE-C interface testing, including: a first connector 1 and a second connector 2. The first connector 1 is a TYPE-C plug, connected to the TYPE-C interface 41 of the mobile phone. The second connector 2 is a TYPE-C jack, connected to a USB flash drive via an OTG adapter cable. A control switch 3 is provided between the first connector 1 and the second connector 2, and the control switch 3 is a single-pole double-throw switch.

[0027] Specifically, Figure 6 As shown, the single-pole double-throw switch includes: contact I 31, contact II 32 and contact III 33, contact I 31 is connected to the CC1 pin of the first connector 1, contact II 32 is connected to the CC1 pin and the Vconn pin of the second connector 2, and contact III 33 is connected to the CC2 pin of the first connector 1.

[0028] The single-pole double-throw switch also includes: a sliding fork 34. When the sliding fork 34 slides to the left to position a, the contact I 31 and the contact II 32 of the OTG expansion device are connected, and the CC1 of the mobile phone TYPE-C interface 41 is connected to the CC1 of the second connector 2 of the OTG expansion device. The TYPE-C interface can detect that CC1 has a pull-down resistor, and it is determined that the OTG expansion device is inserted forward. When the sliding fork 34 slides to the right to position b, the contact II 32 and the contact III 33 of the OTG expansion device are connected, and the CC1 of the second connector 2 of the OTG expansion device is connected to the CC2 of the mobile phone TYPE-C interface 41. The TYPE-C interface 41 can detect the pull-down resistor on CC2. It is determined that the OTG expansion device is inserted reversely.

[0029] Embodiment 2 discloses an OTG expansion device for TYPE-C interface testing. The difference between this embodiment and embodiment 1 is that the second connector 2 is a USB socket, and the U disk is directly connected to the second connector 2.

[0030] It is understood that what is described in the specific implementation is only one embodiment of the present invention, and those skilled in the art may make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. An OTG expansion device for TYPE-C interface testing, characterized in that: include: A first connector (1) connected to a TYPE-C interface (41) of an intelligent terminal and a second connector (2) connected to an external device (6), a control switch (3) being arranged between the first connector (1) and the second connector (2), the control switch (3) being used to switch the connection relationship between a CC1 pin and a Vconn pin of an OTG expansion device and a CC1 pin and a CC2 pin of the TYPE-C interface (41), so that the TYPE-C interface (41) can detect the forward and reverse insertion of the OTG expansion device without repeated plugging and unplugging.

2. The OTG expansion device for TYPE-C interface testing according to claim 1, characterized in that: The control switch (3) is a single-pole double-throw switch, and the single-pole double-throw switch is arranged on the side wall of the OTG expansion device.

3. The OTG expansion device for TYPE-C interface testing according to claim 1, characterized in that: The control switch (3) comprises: a contact I (31), a contact II (32) and a contact III (33), wherein the contact I (31) is connected to the CC1 pin of the first connector (1), the contact II is connected to the CC1 pin and the Vconn pin of the second connector (2), and the contact III (33) is connected to the CC2 pin of the first connector (1).

4. The OTG expansion device for TYPE-C interface testing according to claim 3, characterized in that: The control switch (3) further comprises: a sliding fork (34), wherein the sliding fork (34) connects the contact I (31) and the contact II (32) when sliding to the left, and connects the contact II (32) and the contact III (33) when sliding to the right.

5. The OTG expansion device for TYPE-C interface testing according to claim 1, characterized in that: The first connector (1) is a TYPE-C plug, and the second connector (2) is a TYPE-C socket or a USB socket.

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