CN108539537B

CN108539537B - Plug with a locking mechanism

Info

Publication number: CN108539537B
Application number: CN201810251161.6A
Authority: CN
Inventors: 杨伟
Original assignee: JUST CONNECTOR KUNSHAN CO Ltd
Current assignee: JUST CONNECTOR KUNSHAN CO Ltd
Priority date: 2018-03-26
Filing date: 2018-03-26
Publication date: 2021-02-12
Anticipated expiration: 2038-03-26
Also published as: CN108539537A

Abstract

The application provides a plug, including metal casing, insert printed circuit board in the metal casing, weld in the printed circuit board front end and expose in the conductive terminal of metal casing upper and lower surface and will metal casing and printed circuit board mould plastics and combine insulator as an organic whole, the metal casing forms the open chamber of acceping of rear end, the upper and lower surface of acceping the chamber front end is got rid of and is formed and supplies conductive terminal exposes in external opening, conductive terminal includes a plurality of transmission terminals and is located the detection terminal in transmission terminal both sides the place ahead, detect the terminal including weld in the weld part on the printed circuit board and from the weld part outwards extends the contact site in the printed circuit board outside. This application adds the detection function of plug, can pass through earphone broadcast music in step when charging.

Description

Plug with a locking mechanism

Technical Field

The present application relates to the field of electrical connectors, and more particularly, to a plug.

Background

Apple company has cancelled 3.5mm earphone interface behind iPhone7, has changed into the Lighting interface and has carried out audio transmission, but the Lighting interface has also only been set up one, undertakes the function of charging and audio transmission, then when can't use the earphone to listen to the music when charging, then can't charge when using the earphone to listen to the music.

The apple lightning socket standard has 10 transmission terminals per se, and as shown in fig. 10 of the chinese patent application CN105762541A, the lightning socket includes 10 transmission terminals, and the two outermost transmission terminals on the left and right sides are not utilized in the actual use process. At present, in order to solve the problem of charging and listening to music simultaneously, a one-to-two switching interface is needed, when the one-to-two switching interface is used, a central processing unit needs to be informed of the connected equipment state, at the moment, a detection signal terminal needs to be used for controlling, and thus two transmission terminals on the outer side of a lightning socket which is not used are needed.

Disclosure of Invention

Therefore, there is a need to provide a plug to solve the problem that the existing apple phone cannot use the lightning interface for charging and the earphone for playing music at the same time.

In order to solve the technical problem, the application provides a plug, which comprises a metal shell, a printed circuit board inserted into the metal shell, a conductive terminal welded at the front end of the printed circuit board and exposed out of the upper surface and the lower surface of the metal shell, and an insulating body for combining the metal shell and the printed circuit board into a whole through injection molding, wherein the metal shell forms an accommodating cavity with an open rear end, the upper surface and the lower surface of the front end of the accommodating cavity are removed to form an opening for exposing the conductive terminal out of the outside, the conductive terminal comprises a plurality of transmission terminals and detection terminals positioned in front of two sides of the transmission terminals, and the detection terminals comprise welding parts welded on the printed circuit board and contact parts extending out of the welding parts and the outer side of the printed circuit board.

Preferably, the accommodating cavity comprises the upper surface, the lower surface, a side surface and a front end surface, the side surface is recessed towards the accommodating cavity to form a clamping groove, and a connecting part is arranged between the side surface and the front end surface.

Preferably, the side surface of the metal shell is recessed into the receiving cavity to form a slot, the connecting portion is located at the front end of the slot, the upper and lower sides of the connecting portion are removed to form a notch, and the contact portion of the detection terminal is located above the notch.

Preferably, the width of the connecting portion is smaller than the width of the side surface and the front end surface.

Preferably, a forming groove is formed in the connecting portion and located on the inner side of the accommodating cavity, and the forming groove penetrates through the connecting portion in the vertical direction.

Preferably, a plastic block is preformed on the molding groove of the metal shell, and the plastic block comprises a middle part located in the molding groove and an isolation part extending out of the molding groove.

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.

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 soldering portion to increase the distance between the bottom surface of the contact portion and the connecting portion.

Preferably, the welding part of the detection terminal is welded on the printed circuit board, the contact part protrudes upwards to form a contact point, and a solder receiving groove is arranged on the welding surface of the welding part.

Preferably, the printed circuit board further includes a base portion and a through groove formed in the base portion, the soldering region is located in the receiving cavity and at the opening position, and the through groove is filled when the insulating body is integrally molded.

This application plug holds through the formation of cutting the side from top to bottom in the metal casing front end outside listen terminal breach portion, simultaneously will the contact site of listening the terminal outwards extends printed circuit board outside, guarantees under the condition of metal casing integrality, realize listen the butt joint of terminal and the corresponding terminal of socket end.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

FIG. 1 is a perspective assembly view of a plug of the present application;

FIG. 2 is an exploded perspective view of the plug of the present application;

FIG. 3 is a perspective view of the plug of the present application with conductive terminals soldered to a printed circuit board;

fig. 4 is a perspective view of the front and back sides of the plug detection terminal of the present application;

FIG. 5 is a perspective view of the metal shell of the plug of the present application and an enlarged view of a portion thereof;

fig. 6 is a perspective view of the plug of the present application after the insulating body is hidden.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, 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 a front end of the printed circuit board 30 and exposed from 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 a whole.

Referring to fig. 2 and 5, the metal housing 10 is manufactured by die casting or CNC process, the metal housing 10 forms a receiving cavity 12 with an open rear end, the receiving cavity 12 includes an upper surface 11, a lower surface 11, a side surface 13 and a front end surface 14, and the receiving cavity 12 is cut at a position of the upper surface 11 and the lower surface 11 close to the front end surface 14 to form an opening 15, so that the conductive terminal 40 is exposed out of the upper surface 11 and the lower surface 11. The side surface 13 is recessed toward the inner receiving cavity 12 to form a locking groove 131. A connecting portion 132 having 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 slot 131, and the width of the connecting portion 132 is smaller than the widths of the side surface 13 and the front end surface 14, so that notch portions 133 are formed at upper and lower sides of the connecting portion 132. The connecting portion 132 is provided with a forming groove 134 at an inner side of the accommodating cavity 12, the forming groove 134 penetrates the connecting portion 132 in an up-down direction, and the through groove 134 forms an opening 1341 wider than the middle portion 1342 at upper and lower ends.

Referring to FIGS. 2 and 4,

the conductive terminals 40 include 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 soldering portion 421, a contact portion 422 formed by protruding and extending from the front end of the soldering portion 421, and a contact point 423 formed by protruding upward from the contact portion 422. The soldering surface of the soldering portion 421 is provided with a tin containing groove 424. The length of the welding part 421 is greater than that of the contact part 422 to make the welding area larger.

As shown in fig. 3 and fig. 6, the printed circuit board 30 includes a base portion 31, a soldering region 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 soldered on the soldering area 32 of the printed circuit board 30, and the contact point 423 of the detection terminal 42 is located at the front position outside the contact point 411 of the transmission terminal 41.

The contact portion 422 of the detection terminal 42 extends outward beyond the printed circuit board 30, that is, the contact portion 422 is located above the connection portion 132, and a certain gap exists between the contact portion 422 and the connection portion 132, which is why the upper and lower sides of the connection portion 132 are cut off to form the notch 133, so that the contact portion 422 does not electrically contact the connection portion 132.

Referring to fig. 2, in order to further solve the short circuit problem between the detection terminal 42 and the metal shell 10, a plastic block 50 is pre-molded on the molding groove 134 inside the connection portion 132 to adapt to the structure of the molding groove 134, the plastic block 50 includes an intermediate portion 51 located inside the molding groove 134 and an isolation portion 52 extending out of the molding groove 134, and the isolation portion 52 is located between the contact portion 422 and the connection portion 132 to isolate the possible short circuit risks therebetween.

In another embodiment, a pre-molded plastic block 50 is not required to be used, so as to save the manufacturing cost, in this case, the bottom surface of the contact portion 422 of the detection terminal 42 needs to be thinned, that is, the bottom surface of the contact portion 422 is higher than the bottom surface of the soldering portion 421, so as to increase the distance between the bottom surface of the contact portion 422 and the connecting portion 132.

The manufacturing principle of the plug of the application is as follows:

the metal shell 10 is formed by die casting, the plastic block 50 is formed on the forming groove 134 of the metal shell 10, the printed circuit board 30 is inserted from the rear end of the metal shell 10, the conductive terminals 40 are welded on the welding area 32 at the front end of the printed circuit board 30, and finally the insulation body 20 is formed by injection molding, and the insulation body 20 is filled into the through groove 33 of the printed circuit board 30 to be combined into a whole.

This application plug is through cutting out the formation with metal casing 10 front end outside about the side and hold detect terminal 42 breach portion 133, simultaneously will detect outside the contact site 422 of terminal 42 extends printed circuit board 30, guarantees under the condition of metal casing 10 integrality, realize detect the butt joint of terminal 42 and the corresponding terminal of socket end.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. 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 comprises a metal shell, a printed circuit board inserted into the metal shell, conductive terminals welded at the front end of the printed circuit board and exposed out of the upper and lower surfaces of the metal shell, and an insulating body for integrating the metal shell and the printed circuit board into a whole by injection molding, the metal shell forms an accommodating cavity with an open rear end, the upper surface and the lower surface of the front end of the accommodating cavity are removed to form an opening for exposing the conductive terminal outside, it is characterized in that the conductive terminal comprises a plurality of transmission terminals and detection terminals positioned in front of two sides of the transmission terminals, the detecting terminal comprises a welding part welded on the printed circuit board and a contact part extending outwards from the welding part to the outer side of the printed circuit board, when the plug is used for being butted with the one-to-two switching interface, the detection terminal is connected with a corresponding terminal of a socket end of the one-to-two switching interface to upload the state of the connecting equipment;

the side of metal casing to accept the sunken draw-in groove that forms of chamber, connecting portion are located the front end of draw-in groove, both sides are got rid of about the connecting portion and are formed breach portion, the contact site of listening the terminal is located breach portion top.

2. The plug of claim 1, wherein the receiving cavity comprises the upper and lower surfaces, a side surface and a front end surface, the side surface is recessed into the receiving cavity to form a slot, and a connecting portion is disposed between the side surface and the front end surface.

3. The plug of claim 1, wherein the connecting portion has a width less than a width of the side surface and the front face.

4. The plug of claim 1, wherein the connecting portion is provided with a forming groove at an inner side of the receiving cavity, and the forming groove penetrates through the connecting portion in an up-down direction.

5. The plug of claim 4, wherein the molded groove of the metal shell is pre-formed with a plastic block, the plastic block including an intermediate portion located within the molded groove and a spacer portion extending outside of the molded groove.

6. The plug of claim 5, wherein 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 of claim 1, wherein the bottom surface of the contact portion of the detection terminal is thinned such that the bottom surface of the contact portion is higher than the bottom surface of the soldering portion to increase the distance between the bottom surface of the contact portion and the connecting portion.

8. The plug of claim 1, wherein the soldering portion of the detecting terminal is soldered on the printed circuit board, the contact portion protrudes upward to form a contact point, and a solder receiving groove is formed on a soldering surface of the soldering portion.

9. The plug of claim 1, wherein the printed circuit board further comprises a base portion and a through-groove formed in the base portion, the soldering region is located in the receiving cavity and at the opening position, and the through-groove is filled when the insulating body is integrally molded.