POWER PLUG HAVING A TERMINAL WITH SOLDERING ARMS CLAMPING A SOLDERING TAIL OF ANOTHER TERMINAL
A power plug includes a base body having a mating pillar, a first electrical terminal which has a connecting board and two first contact arms extending upward from two ends of a top edge of the connecting board and inclined toward each other, a second electrical terminal which has a connecting portion and two second contact arms extending upward from two ends of a top of the connecting portion and inclined toward each other, and a sleeve terminal having a contact sleeve put around the mating pillar. The first electrical terminal and the second electrical terminal are crosswise assembled in the mating pillar to make the first contact arms and the second contact arms provide elastic clamping forces from four directions. So, it effectively increases insertion and extraction forces between the power plug and a mating socket, and further prolongs the useful life of the power plug.
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1. Field of the Invention
The present invention relates to a plug, and more particularly to a power plug.
2. The Related Art
Referring to
However, the foregoing power plug utilizes single electrical terminal 20′ to electrically contact with a mating socket (not shown. The contact arms 22′ of the electrical terminal 20′ provide elastic clamping forces only from two directions. As a result, the elastic clamping forces of the contact arms 22′ easily become weaker and weaker after repeatedly inserting and extracting the power plug for many times. That further shortens the useful life of the power plug.
SUMMARY OF THE INVENTIONAccordingly, an object of the present invention is to provide a power plug including a base body, a first electrical terminal, a second electrical terminal and a sleeve terminal. The base body has a columned mating pillar placed vertically. A top of the mating pillar is concaved downward to form a mating hole, a pair of first receiving fillisters and a pair of second receiving fillisters alternately located around the mating hole and communicating with the mating hole. The first receiving fillisters and the second receiving fillisters are respectively aligned along a radial direction of the mating hole. The first receiving fillisters and the second receiving fillisters further penetrate downward through the mating pillar to form a rectangular first through slot and a rectangular second through slot which cross each other and connect with each other. The first electrical terminal has a connecting board, a soldering tail protruding downward from a middle of a bottom edge of the connecting board, and a pair of first contact arms extending upward from two ends of a top edge of the connecting board and inclined toward each other in process of extending upward. The connecting board is inserted in the first through slot of the base body with the soldering tail projecting out under the mating pillar and the first contact arms being received in the first receiving fillisters. The second electrical terminal has a connecting portion, a pair of soldering arms extending downward from two ends of a bottom of the connecting portion, and a pair of second contact arms extending upward from two ends of a top of the connecting portion and inclined toward each other in process of extending upward. The connecting portion is located in the second through slot of the base body with the soldering arms partly projecting out under the mating pillar and the second contact arms being received in the second receiving fillisters. The soldering tail of the first electrical terminal is clamped between the soldering arms of the second electrical terminal. The sleeve terminal has a cylindraceous contact sleeve put around the mating pillar of the base body. At least one soldering foot protrudes downward from a bottom edge of the contact sleeve and further partly projects under the mating pillar of the base body.
As described above, the first electrical terminal and the second electrical terminal are crosswise assembled in the mating pillar of the base body to make the first contact arms and the second contact arms provide elastic clamping forces from four directions. So, it effectively increases insertion and extraction forces between the power plug and a mating socket (not shown, and further prolongs the useful life of the power plug.
The present invention will be apparent to those skilled in the art by reading the following description thereof, with reference to the attached drawings, in which:
Referring to
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Referring to
A middle of the top edge of the connecting board 21 of the first electrical terminal 20 is concaved downward to form a positioning slot 211 for positioning the connecting portion 31 of the second electrical terminal 30 therein. Two side edges of the connecting board 21 and two side edges of the connecting portion 31 protrude outward to form a plurality of barbs 212, 311 resisting against inner sides of the first through slot 114 and the second through slot 115 of the base body 10. Top ends of the first contact arms 22 and top ends of the second contact arms 32 protrude inward and slope downward to form a pair of first guiding slopes 221 and a pair of second guiding slopes 321 of which all project into the mating hole 111 of the base body 10.
Referring to
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As described above, the first electrical terminal 20 and the second electrical terminal 30 are crosswise assembled in the mating pillar 11 of the base body 10 to make the first contact arms 22 and the second contact arms 32 provide elastic clamping forces from four directions. So, it effectively increases insertion and extraction forces between the power plug and a mating socket (not shown, and further prolongs the useful life of the power plug.
Claims
1. A power plug, comprising:
- a base body having a columned mating pillar placed vertically, a top of the mating pillar being concaved downward to form a mating hole, a pair of first receiving fillisters and a pair of second receiving fillisters alternately located around the mating hole and communicating with the mating hole, the first receiving fillisters and the second receiving fillisters being respectively aligned along a radial direction of the mating hole, the first receiving fillisters and the second receiving fillisters further penetrating downward through the mating pillar to form a rectangular first through slot and a rectangular second through slot which cross each other and connect with each other;
- a first electrical terminal having a connecting board, a soldering tail protruding downward from a middle of a bottom edge of the connecting board, and a pair of first contact arms extending upward from two ends of a top edge of the connecting board and inclined toward each other in process of extending upward, the connecting board being inserted in the first through slot of the base body with the soldering tail projecting out under the mating pillar and the first contact arms being received in the first receiving fillisters;
- a second electrical terminal having a connecting portion, a pair of soldering arms extending downward from two ends of a bottom of the connecting portion, and a pair of second contact arms extending upward from two ends of a top of the connecting portion and inclined toward each other in process of extending upward, the connecting portion being located in the second through slot of the base body with the soldering arms partly projecting out under the mating pillar and the second contact arms being received in the second receiving fillisters, the soldering tail of the first electrical terminal being clamped between the soldering arms of the second electrical terminal; and
- a sleeve terminal having a cylindraceous contact sleeve put around the mating pillar of the base body, at least one soldering foot protruding downward from a bottom edge of the contact sleeve and further partly projecting under the mating pillar of the base body.
2. The power plug as claimed in claim 1, wherein a middle of the top edge of the connecting board of the first electrical terminal is concaved downward to form a positioning slot for positioning the connecting portion of the second electrical terminal therein.
3. The power plug as claimed in claim 2, wherein two side edges of the connecting board and two side edges of the connecting portion protrude outward to form a plurality of barbs resisting against inner sides of the first through slot and the second through slot.
4. The power plug as claimed in claim 1, wherein top ends of the first contact arms and top ends of the second contact arms protrude inward and slope downward to form a pair of first guiding slopes and a pair of second guiding slopes of which all project into the mating hole of the base body.
5. The power plug as claimed in claim 1, wherein the first receiving fillisters of the base body are aligned along one radial direction of the mating hole perpendicular to another radial direction of the mating hole along which the second receiving fillisters are aligned.
6. The power plug as claimed in claim 1, wherein the soldering foot of the sleeve terminal has two located along a radial direction of the contact sleeve, a bottom of the mating pillar of the base body oppositely extends outward along a radial direction of the mating pillar to form a pair of propping flanks with a pair of positioning gaps forming at the joints thereof for positioning the corresponding soldering feet of the sleeve terminal therein.
7. The power plug as claimed in claim 6, wherein each propping flank of the base body defines at least one fastening aperture vertically penetrating therethrough, the power plug further includes a fastening member of flat board shape and at least two fastening elements, the fastening member defines an assembling hole through which the mating pillar of the base body together with the contact sleeve of the sleeve terminal passes to make the fastening member abut on the propping flanks, then the fastening elements pass upward through the fastening apertures to fix the fastening member and the propping flanks together.
8. The power plug as claimed in claim 7, wherein the fastening element is a screw.
9. The power plug as claimed in claim 1, wherein an outer periphery of the mating pillar of the base body is concaved inward to form a cylindraceous restraining groove for restraining the contact sleeve of the sleeve terminal therein.
Type: Application
Filed: Apr 10, 2012
Publication Date: Oct 10, 2013
Applicant: Cheng Uei Precision Industry Co., LTD. (New Taipei City)
Inventor: Chin-Chou WANG (New Taipei City)
Application Number: 13/443,870
International Classification: H01R 33/20 (20060101);