The present invention generally relates to an audio jack used for engaging with an audio plug, And more particularly to a contact terminal with contact engaging portion supported by reinforced spring arm thereby increasing its normal force.
U.S. Pat. No. 6,478,629B1 issued to Chun Sheng on Nov. 12, 2002 discloses an audio jack includes an insulative casing (6) inside which a movable terminal 4 is disposed. The casing has a front face (60), a rear face (64), a pair of opposite side faces (62, 63); An interior space (601) is defined in the casing. The movable terminal 4 has a plate portion 43 received in the movable terminal holding slot 605, 607, an internal contact portion 41 extending from one end of the plate portion 43, and a solder pad 42 extending out of the casing 6 from a bottom edge of the plate portion 43 for being soldered on the printed circuit board. The internal contact portion 41 of the movable terminal 4 deflectably extends into a middle cavity 604 of the interior space 601. Since the internal contact portion 41 of the movable terminal 4 extend into the middle cavity 604 of the interior space 601, the pin of the mating plug 7 contacts and deflects the internal contact portions 41 of the movable terminals 4. Thus, the internal contact portion 41 of the movable terminal 4 is separated from the internal contact portions 31 of the first and second stationary terminals 1, 3.
An aspect of the invention is to provide a connector with two spring thermals which improves the elasticity of the contact.
Accordingly, the object of the present invention is to provide an audio jack for receiving an audio plug, the audio jack having a contact with two spring terminals which improves the elasticity of the contact.
In order to achieve the object set forth, an audio jack of the present invention comprises an audio jack for receiving a mating plug, comprises insulative housing defining a longitudinal plug-insertion hole therethrough and having a top wall, a bottom wall, a first sidewall, a second sidewall and a rear wall; set of contacts assembled on the insulative housing and including a contact terminal and a stable contact, wherein the contact terminal and the stable contact are inserted successively to the rear wall of the insulative housing. A contact terminal comprised a base portion, a first spring arm extending from an end of the base and having a contact engaging portion located above the base portion; and a reinforce arm extending from the base and having a portion located substantially under the contact engaging portion thereby increasing its normal force.
Reference will now be made in detail to the preferred embodiment of the present invention.
Referring to
The insulative housing 1 includes a substantially cubical main body 10 and a cylindrical sleeve 11 forwardly extending from a front face of the main body 10. A plug-insertion hole 12 is longitudinally defined through the main body 10 and the sleeve 11 for receiving a mating plug.
The main body 10 has a top wall 13, a bottom wall 14, a first sidewall 15, a second sidewall 16 opposite to the first sidewall 15 and a rear wall 17. A first opening 110 adjacent to the sleeve 11 is defined in the top wall 13, The first opening 110 run through the top wall 13, and both communicate with the plug-insertion hole 12. And a recess 150 is formed at the first sidewall 15 and the second sidewall 16, and a projection 151 protrudes upwardly in the recess 150.
Referring to
Particularly referring to
The set of contacts comprises a first contact 2, a second contact 3, a third contact 4 and a fourth contact 5.
The first contact 2 has a first securing portion 21, a first resilient portion 210 extending downwardly at an angle from the top end of the first securing portion 21 and a rectangular first solder tab 24 extending perpendicularly from the bottom end of the sidewall 22 for being surface mounted on a printed circuit board (PCB) (not shown).
The second contact 3 has a second securing portion 31, a second resilient portion 32 extending downwardly at an angle from the top end of the first securing portion 31 and a rectangular second solder tab 33 extending perpendicularly from the bottom end of the second securing portion 31 for being surface mounted on a printed circuit board (PCB) (not shown).
The third contact 4 defines a retain portion 41, and a third spring thermal 43 extending from the middle side of the retain portion 41, the end of the retain portion 41 extended an arm 42.
The fourth contact 5 has a inserted portion 51, the pad 52 extending perpendicularly from the inserted portion 51 for being surface mounted on the PCB, a link portion 53 extending from the side of the inserted portion 51, a contact portion 54 protrudes horizontally from the side of the inserted portion 51.
The contact terminal 6 and a stable contact 7, wherein the contact terminal 6 and the stable contact 7 are inserted successively to the rear wall of the insulative housing. The contact terminal 6 comprised a base portion 60, a first spring arm 66 extending from an end of the base 60 and having a contact engaging portion 67 located above the base portion 60; and a reinforce arm 65 extending from the base 60 and having a portion located substantially under the contact engaging portion 67 thereby increasing its normal force.
In assembly, with reference to
A contact terminal 6 and a stable contact 7, wherein the contact terminal 6 and the stable contact 7 are inserted successively to the rear wall of the insulative housing, The contact terminal 6 comprised a base portion 60, a first spring arm 66 extending from an end of the base 60 and having a contact engaging portion 67 located above the base portion 60; and a reinforce arm 65 extending from the base 60 and having a portion located substantially under the contact engaging portion 67 thereby increasing its normal force. Therefore, the insulative housing 1 and the set of contacts 2 are assembled reliably.
Particularly referring to
In the present invention, the second resilient portion 651 upwardly extending from the inside of the hollow frame 60 provide a normal force to improve the elasticity of the contact 67 which will make the audio jack 100 used long enough. Therefore, the present invention overcomes the deficiencies of the conventional audio jacks.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
The novel features of the invention are set forth with particularity in the appended claims. The invention will be best understood from the following description when read in conjunction with the accompanying drawings.