plug

Abstract

The present application provides a plug, including a metal shell, a printed circuit board inserted into the metal shell, a conductive terminal welded to the front end of the printed circuit board and exposed on the upper and lower surfaces of the metal shell, and an insulating body that combines the metal shell and the printed circuit board into one body by injection molding, wherein the metal shell forms a receiving cavity with an open rear end, the upper and lower surfaces of the front end of the receiving cavity are removed to form an opening for the conductive terminal to be exposed to the outside, and the outer side of the opening is removed to form a notch, the conductive terminal includes a plurality of transmission terminals and detection terminals located in front of both sides of the transmission terminal, and the detection terminal includes a welding portion welded on the printed circuit board and a contact portion extending outward from the welding portion to the position of the notch. The present application adds a detection function to the plug, which can play music through headphones simultaneously while charging.

Description

Technical Field

[0001] The present application relates to the field of electrical connectors, and in particular to a plug. Background Art

[0002] Since iPhone 7, Apple has cancelled the 3.5mm headphone jack and used the Lighting interface for audio transmission instead. However, there is only one Lighting interface, which is responsible for charging and audio transmission. You cannot use headphones to listen to music while charging, and you cannot charge while using headphones to listen to music.

[0003] Apple's lightning socket standard itself has 10 transmission terminals. For example, Figure 10 of Chinese patent application CN105762541A discloses a lightning socket, which includes 10 transmission terminals, and the two outermost transmission terminals on the left and right sides are not used in actual use. At present, in order to solve the problem of charging and listening to music at the same time, it is necessary to use a one-to-two adapter interface. When using a one-to-two interface, it is necessary to notify the central processor of the status of the connected device. At this time, the detection signal terminal is needed for control, so the two unused outer transmission terminals of the lightning socket are needed. Summary of the invention

[0004] In view of this, it is necessary to provide a plug to solve the problem that the existing Apple mobile phone cannot use the lightning interface for charging and playing music through headphones at the same time.

[0005] In order to solve the above technical problems, the present application provides a plug, including a metal shell, a printed circuit board inserted into the metal shell, a conductive terminal welded to the front end of the printed circuit board and exposed on the upper and lower surfaces of the metal shell, and an insulating body that injection-moldes the metal shell and the printed circuit board into one body, the metal shell forms a receiving cavity with an open rear end, the upper and lower surfaces of the front end of the receiving cavity are removed to form an opening for the conductive terminal to be exposed to the outside, and the outer side of the opening is removed to form a notch, the conductive terminal includes a plurality of transmission terminals and detection terminals located in front of both sides of the transmission terminal, and the detection terminal includes a welding portion welded on the printed circuit board and a contact portion extending outward from the welding portion to the position of the notch.

[0006] The plug of the present application forms a notch for accommodating the detection terminal by cutting off the upper and lower sides of the outer front end of the metal shell, and at the same time extends the contact portion of the detection terminal outward from the printed circuit board, thereby ensuring the integrity of the metal shell and achieving docking between the detection terminal and the corresponding terminal of the socket end.

[0007] Preferably, the receiving cavity includes the upper and lower surfaces, the side surfaces and the front end surface, the side surfaces are recessed toward the receiving cavity to form a slot, a connecting portion is provided between the side surfaces and the front end surface, and the notch portion is located on the connecting portion.

[0008] Preferably, the connecting portion is located at the front end of the card slot, and the width of the connecting portion is smaller than the width of the side surface and the front end surface.

[0009] Preferably, the connecting portion is provided with a forming groove on the inner side of the accommodating cavity, and the forming groove passes through the connecting portion in the up-down direction.

[0010] Preferably, a plastic block is preformed on the molding groove of the metal shell, and the plastic block includes a middle portion located in the molding groove and an isolation portion extending out of the molding groove.

[0011] Preferably, the contact portion of the detection terminal is located above the isolation portion and contacts the isolation portion, and the isolation portion electrically isolates the detection terminal from the connection portion.

[0012] Preferably, the bottom surface of the contact portion of the detection terminal is thinned, that is, the bottom surface of the contact portion is higher than the bottom surface of the welding portion to increase the distance between the bottom surface of the contact portion and the connecting portion.

[0013] Preferably, the welding portion of the detection terminal is welded on the printed circuit board, the contact portion extends outward from the printed circuit board, and the contact portion protrudes upward to form a contact point.

[0014] Preferably, a tin containing groove is provided on the welding surface of the welding portion.

[0015] Preferably, the printed circuit board further comprises a base portion and a through groove formed on the base portion, the welding area is located in the receiving cavity and at the opening position, and the insulating body fills the through groove when being integrally formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0017] Figure 1 A three-dimensional assembly diagram of the plug of this application;

[0018] Figure 2 This is a three-dimensional exploded view of the plug of this application;

[0019] Figure 3 A three-dimensional diagram of the conductive terminals of the plug of the present application being soldered to a printed circuit board;

[0020] Figure 4 A perspective view of the front and back sides of the plug detection terminal of the present application;

[0021] Figure 5 A three-dimensional diagram of the metal shell of the plug of this application and a partial enlarged diagram thereof;

[0022] Figure 6 This is a three-dimensional diagram of the plug of this application with the insulating body hidden. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0024] See also Figure 1 , Figure 2 As shown, the plug of the present application includes a metal shell 10, a printed circuit board 30 inserted into the metal shell 10, a conductive terminal 40 welded to the front end of the printed circuit board 30 and exposed on the upper and lower surfaces of the metal shell 10, and an insulating body 20 that injection molds the metal shell 10 and the printed circuit board 30 into one body.

[0025] See also Figure 2 , Figure 5 As shown, the metal shell 10 is manufactured by die-casting or CNC process, and the metal shell 10 forms a receiving cavity 12 with an open rear end, and the receiving cavity 12 includes upper and lower surfaces 11, side surfaces 13 and front end surface 14. The receiving cavity 12 is located at the upper and lower surfaces 11 near the front end surface 14, and an opening 15 is cut out to form the receiving cavity 12 so that the conductive terminal 40 is exposed on the upper and lower surfaces 11. The side surface 13 is recessed inwardly toward the receiving cavity 12 to form a card slot 131. A connecting portion 132 with an arc structure is connected between the side surface 13 and the front end surface 14. The connecting portion 132 is located at the front end of the card slot 131, and the width of the connecting portion 132 is smaller than the width of the side surface 13 and the front end surface 14, thereby forming a notch portion 133 on the upper and lower sides of the connecting portion 132. The connecting portion 132 is located inside the receiving cavity 12 and is provided with a forming groove 134 . The forming groove 134 passes through the connecting portion 132 in the vertical direction. The through groove 134 forms openings 1341 at the upper and lower ends that are wider than the middle portion 1342 .

[0026] See also Figure 2 , Figure 4As shown, the conductive terminal 40 includes a plurality of transmission terminals 41 and a detection terminal 42 located at the outermost side of the transmission terminals. The detection terminal 42 includes a welding portion 421, a contact portion 422 formed by protruding outward from the front end of the welding portion 421, and a contact point 423 formed by protruding upward from the contact portion 422. A soldering groove 424 is provided on the welding surface of the welding portion 421. The length of the welding portion 421 is greater than the length of the contact portion 422 to increase the welding area.

[0027] Please continue reading Figure 3 , Figure 6 As shown, the printed circuit board 30 includes a base portion 31, a welding area 32 inserted into the receiving cavity 12 and located at the position of the opening 15, and a through slot 33 opened on the base portion 31. The conductive terminal 40 is welded on the welding area 32 of the printed circuit board 30, and the contact point 423 of the detection terminal 42 is located outside and in front of the contact point 411 of the transmission terminal 41.

[0028] The contact portion 422 of the detection terminal 42 extends outward from the outside of the printed circuit board 30, that is, the contact portion 422 is located above the connecting portion 132, and there is a certain gap between the contact portion 422 and the connecting portion 132. This is the reason why the notch portion 133 is formed by cutting off the upper and lower sides of the connecting portion 132, so that the contact portion 422 does not electrically contact the connecting portion 132.

[0029] Key References Figure 2 As shown, in order to further eliminate the short circuit problem between the detection terminal 42 and the metal shell 10, the present application pre-forms a plastic block 50 on the molding groove 134 on the inner side of the connecting portion 132 to adapt to the structure of the molding groove 134. The plastic block 50 includes a middle portion 51 located in the molding groove 134 and an isolation portion 52 extending out of the molding groove 134. The isolation portion 52 is located between the contact portion 422 and the connecting portion 132 to isolate the possible short circuit risk between them.

[0030] In another embodiment, the technical solution of pre-molded plastic block 50 may not be adopted to save manufacturing cost. In this case, the bottom surface of the contact portion 422 of the detection terminal 42 needs to be set to be thinned, that is, the bottom surface of the contact portion 422 is higher than the bottom surface of the welding portion 421 to increase the distance between the bottom surface of the contact portion 422 and the connecting portion 132.

[0031] The manufacturing principle of the plug of this application is as follows:

[0032] The metal housing 10 is first die-casted, the plastic block 50 is molded on the molding groove 134 of the metal housing 10, the printed circuit board 30 is inserted from the rear end of the metal housing 10, the conductive terminal 40 is welded to the welding area 32 at the front end of the printed circuit board 30, and finally the insulating body 20 is injection-molded, and the insulating body 20 is filled into the through groove 33 of the printed circuit board 30 to be integrated.

[0033] The plug of the present application forms a notch 133 for accommodating the detection terminal 42 by cutting off the upper and lower sides of the front outer side of the metal shell 10, and at the same time extends the contact portion 422 of the detection terminal 42 outward from the printed circuit board 30, thereby ensuring the integrity of the metal shell 10 and achieving the docking of the detection terminal 42 with the corresponding terminal of the socket end.

[0034] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0035] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A plug, comprising a metal shell, a printed circuit board inserted into the metal shell, conductive terminals welded to the front end of the printed circuit board and exposed on the upper and lower surfaces of the metal shell, and an insulating body formed by injection molding the metal shell and the printed circuit board into one body, wherein the metal shell forms a receiving cavity with an open rear end, and the upper and lower surfaces of the front end of the receiving cavity are removed to form an opening for the conductive terminals to be exposed to the outside, characterized in that: The outer side of the opening is removed to form a notch portion, the conductive terminal includes a plurality of transmission terminals and detection terminals located in front of both sides of the transmission terminals, and the detection terminal includes a welding portion welded on the printed circuit board and a contact portion extending outward from the welding portion to the position of the notch portion.

2. The plug according to claim 1, characterized in that The receiving cavity comprises the upper and lower surfaces, the side surface and the front end surface, the side surface is recessed toward the receiving cavity to form a slot, a connecting portion is provided between the side surface and the front end surface, and the notch portion is located on the connecting portion.

3. The plug according to claim 2, characterized in that The connecting portion is located at the front end of the card slot, and the width of the connecting portion is smaller than the widths of the side surface and the front end surface.

4. The plug according to claim 2, characterized in that: The connecting portion is located at the inner side of the receiving cavity and is provided with a forming groove, and the forming groove passes through the connecting portion in the up-down direction.

5. The plug according to claim 4, characterized in that A plastic block is preformed on the molding groove of the metal shell, and the plastic block includes a middle portion located in the molding groove and an isolation portion extending out of the molding groove.

6. The plug according to claim 5, characterized in that The contact portion of the detection terminal is located above the isolation portion and contacts the isolation portion, and the isolation portion electrically isolates the detection terminal from the connection portion.

7. The plug according to claim 2, characterized in that The bottom surface of the contact portion of the detection terminal is thinned, that is, the bottom surface of the contact portion is higher than the bottom surface of the welding portion to increase the distance between the bottom surface of the contact portion and the connecting portion.

8. The plug according to claim 1, characterized in that The welding portion of the detection terminal is welded on the printed circuit board, the contact portion extends outward from the printed circuit board, and the contact portion protrudes upward to form a contact point.

9. The plug according to claim 8, characterized in that A tin containing groove is arranged on the welding surface of the welding part.

10. The plug according to claim 1, characterized in that The printed circuit board further comprises a base part and a through slot formed on the base part, the welding area is located in the receiving cavity and at the opening position, and the through slot is filled when the insulating body is integrally formed.

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