Patent Grant
9011188
The present invention relates to a connection structure of a terminal to an electric wire.
This terminal 110 has an electrical connection part 111 connected to a battery etc. in the front, and also has an electric wire connection part 112 connected to the distal end of an electric wire W by ultrasonic welding in the back of the electrical connection part 111. The electric wire connection part 112 includes a conductor connection part 114 positioned in the front side, and a sheath fixing part 115 positioned in the back side of the conductor connection part 114, and the conductor connection part 114 is formed in a U-shaped cross section by having a base plate part 121, and a pair of side wall parts 122, 122 upwardly erected from both lateral edges of the base plate part 121. The distal end of the electric wire W is electrically and mechanically connected to the terminal 110 by placing a conductor Wa exposed by removing an insulating sheath Wb on the base plate part 121 of the conductor connection part 114 and holding the portion covered with the insulating sheath Wb in the sheath fixing part 115 and welding the conductor Wa to the base plate part 121 of the conductor connection part 114 in that state.
Incidentally, in the conventional connection structure between the terminal and the electric wire described above, the conductor Wa of the distal end of the electric wire W connected to the terminal 110 remains exposed to the outside, so that when water adheres to the conductor Wa, the conductor Wa is susceptible to corrosion, with the result that there was fear of damaging electrical connection reliability.
The invention has been implemented in view of the circumstances described above, and an object of the invention is to provide a connection structure of a terminal to an electric wire constructed so that even when water adheres to an electric wire connection part, the water is prevented from entering a conductor of the electric wire to prevent a problem of corrosion of the conductor of the electric wire and fear of damaging electrical connection reliability can be solved.
In order to achieve the object described above, a connection structure of a terminal to an electric wire according to the invention is characterized by the following (1) to (4).
(1) A connection structure of a terminal to an electric wire constructed so that a terminal having an electrical connection part for making connection to the other terminal in the front, and an electric wire connection part formed in substantially a U shape in cross-section view by having a base plate part and a pair of side wall parts upwardly extending from both lateral edges of the base plate part in the back of the electrical connection part is used and a distal end of an electric wire is inserted into the electric wire connection part of the terminal and a conductor exposed by removing an insulating sheath of the distal end of the electric wire is placed on a front side of an upper surface of the base plate part and also a portion of the insulating sheath of the distal end of the electric wire is placed on a back side of the upper surface of the base plate part and the conductor is bonded to the base plate part by welding in that state, wherein a portion of at least the conductor of the distal end of the electric wire inserted into the electric wire connection part is covered with a metallic cover member and the conductor is bonded to the base plate part together with the cover member by welding.
(2) In the connection structure of the terminal to the electric wire with the configuration of the above (1), the cover member is constructed as substantially a rectangular parallelepiped block in which a front end wall with which a top surface of a conductor of the distal end of the electric wire is covered is left and an electric wire insertion groove is formed from a back end wall.
(3) In the connection structure of the terminal to the electric wire with the configuration of the above (1) or (2), a range from a top surface of the conductor to a portion of the insulating sheath of the distal end of the electric wire is covered with the cover member.
(4) In the connection structure of the terminal to the electric wire with the configuration of any one of the above (1) to (3), the cover member is formed of the same material as a material of the terminal.
According to the connection structure of the terminal to the electric wire with the configuration of the above (1), together with the metallic cover member formed so as to cover the portion of at least the conductor, the conductor is bonded to the base plate part of the terminal by welding, so that all the exposed portion of the conductor can be covered with the cover member and even if water adheres to the electric wire connection part, the water can be inhibited from entering the conductor by the cover member. Therefore, corrosion of the conductor due to adhesion of the water can be prevented and reliability of connection between the terminal and the electric wire can be maintained over a long period of time.
According to the connection structure of the terminal to the electric wire with the configuration of the above (2), the cover member is constructed as substantially the rectangular parallelepiped block in which the front end wall with which the top surface of the conductor of the distal end of the electric wire is covered is left and the electric wire insertion groove is formed from the back end wall, so that the distal end of the electric wire can be covered with the cover member after the distal end of the electric wire is set in the electric wire connection part, and the distal end of the electric wire can also be inserted into the tunnel-shaped electric wire insertion groove of the rectangular parallelepiped block after the cover member is previously set in the electric wire connection part. When the cover member is previously set, the front end wall of the cover member performs a function of a stopper wall, so that an insertion position of the conductor can be set properly.
According to the connection structure of the terminal to the electric wire with the configuration of the above (3), together with the conductor, a part of the insulating sheath is covered with the cover member, so that the conductor can fully be covered and corrosion of the conductor can be prevented more surely.
According to the connection structure of the terminal to the electric wire with the configuration of the above (4), the cover member is formed of the same material as the material of the terminal, so that the terminal can be connected to the electric wire more surely.
According to the invention, even when water adheres to the part of connection between the terminal and the electric wire, the water can be prevented from entering the conductor of the electric wire to prevent a problem of corrosion of the conductor of the electric wire, with the result that fear of damaging electrical connection reliability can be solved.
The invention has been described above briefly. Further, the details of the invention will become more apparent by reading through a mode for carrying out the invention described below with reference to the accompanying drawings.
a) and 2(b) are configuration diagrams of a cover member used in the same connection structure, and
An embodiment of the invention will hereinafter be described with reference to the drawings.
In addition, in the invention, the side connected to the other terminal etc. in a terminal is set at the front, and the side connected to an electric wire in the terminal is set at the back.
As shown in
The electric wire connection part 12 includes a conductor welding part 14 positioned in the front side, and a sheath holding part 15 positioned in the back side of the conductor welding part 14. The conductor welding part 14 is formed in substantially a U shape in cross-section view by having a flat base plate part 21 and a pair of mutually substantially parallel side wall parts 22 upwardly extending from both lateral edges of the base plate part 21, and the sheath holding part 15 is formed in substantially a U shape in cross-section view by having a flat base plate part 23 and a pair of mutually substantially parallel side wall parts 24 upwardly extending from both lateral edges of the base plate part 23. The base plate parts 21, 23 and the side wall parts 22, 24 ranging from the conductor welding part 14 to the sheath holding part 15 are respectively formed as continuous plate-shaped walls, but the back ends of the side wall parts 24 constructing the sheath holding part 15 may be bent inwardly to some extent in order to increase the holding strength for the electric wire W.
In the case of obtaining a connection structure of the embodiment, as shown in
The cover member 30 in this case is made of copper which is the same as a material of the terminal 10, and is constructed as substantially a rectangular parallelepiped block 31 in which a front end wall 34 with which the top surface of the conductor Wa of the distal end of the electric wire W is covered is left and an electric wire insertion groove 36 is formed from a back end wall. That is, this rectangular parallelepiped block 31 has an upper wall 32, both side walls 33, the front end wall 34 and the tunnel-shaped electric wire insertion groove 36, and is formed in the shape in which a lower surface is opened and an inlet 36A of the electric wire insertion groove 36 is opened in the back end wall as shown in
As shown in
According to the connection structure configured thus, together with the metallic cover member 30 formed so as to cover the range from the conductor Wa to the portion having the insulating sheath Wb, the conductor Wa is bonded to the base plate part 22 of the terminal 10 by welding, so that all the exposed portion of the conductor Wa can be covered with the cover member 30 and even if water adheres to the electric wire connection part 12, the water can be inhibited from entering the conductor Wa by the cover member 30. Therefore, corrosion of the conductor Wa due to adhesion of the water can be prevented and reliability of connection between the terminal 10 and the electric wire W can be maintained over a long period of time.
Also, the cover member 30 is made of copper which is the same as a material of the terminal 10, and is constructed by the rectangular parallelepiped block 31 fitted between the side wall parts 22 of the electric wire connection part 12, the block 31 in which the front end wall 34 with which the top surface of the conductor Wa of the distal end of the electric wire W is covered is left and the tunnel-shaped electric wire insertion groove 36 is formed from the back end wall, so that the distal end of the electric wire W can be covered with the cover member 30 after the distal end of the electric wire W is set in the electric wire connection part 12, and the distal end of the electric wire W can also be inserted into the tunnel-shaped electric wire insertion groove 36 of the rectangular parallelepiped block 31 after the cover member 30 is previously set in the electric wire connection part 12. When the cover member is previously set, the front end wall 34 of the cover member 30 performs a function of a stopper wall, so that an insertion position of the conductor Wa can also be set properly.
In addition, the invention is not limited to the embodiment described above, and modifications, improvements, etc. can be made properly. Moreover, as long as the invention can be achieved, the number of components, materials, shapes, dimensions, arrangement places, etc. of each component in the embodiment described above are arbitrary and are not limited.
The invention has been described in detail with reference to the specific embodiment, but it is apparent to those skilled in the art that various changes or modifications can be made without departing from the spirit and scope of the invention. The present application is based on Japanese patent application (patent application No. 2010-066854) filed on Mar. 23, 2010, and the contents of the patent application are hereby incorporated by reference.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2010-066854 | Mar 2010 | JP | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP2011/056966 | 3/23/2011 | WO | 00 | 9/6/2012 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2011/118623 | 9/29/2011 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 1977846 | Febrey | Oct 1934 | A |
| 2379567 | Buchanan | Jul 1945 | A |
| 2664844 | Bruno et al. | Jan 1954 | A |
| 2815497 | Redslob | Dec 1957 | A |
| 3656092 | Swengel et al. | Apr 1972 | A |
| 3838387 | Grillet | Sep 1974 | A |
| 4491381 | Hamsher et al. | Jan 1985 | A |
| 4496206 | Markwardt et al. | Jan 1985 | A |
| 4602831 | Lockard | Jul 1986 | A |
| 4824383 | Lemke | Apr 1989 | A |
| 4889503 | Philippson et al. | Dec 1989 | A |
| 4927375 | Debortoli et al. | May 1990 | A |
| 5030138 | Capp et al. | Jul 1991 | A |
| 5171166 | Sato et al. | Dec 1992 | A |
| 5300755 | Nishitani et al. | Apr 1994 | A |
| 5499448 | Tournier et al. | Mar 1996 | A |
| 5569882 | Yokoyama et al. | Oct 1996 | A |
| 5662493 | Reichle | Sep 1997 | A |
| 5713745 | Sakurai et al. | Feb 1998 | A |
| 5749756 | Vockroth et al. | May 1998 | A |
| 5857259 | Johnston | Jan 1999 | A |
| 6102728 | Shinchi | Aug 2000 | A |
| 6142838 | Shinchi | Nov 2000 | A |
| 6171150 | Saito et al. | Jan 2001 | B1 |
| 6247977 | Tanaka et al. | Jun 2001 | B1 |
| 6249966 | Pereira et al. | Jun 2001 | B1 |
| 6319046 | Feye-Hohmann et al. | Nov 2001 | B1 |
| 6939164 | Noro | Sep 2005 | B2 |
| 7014496 | Shimirak | Mar 2006 | B2 |
| 7018230 | Shimirak | Mar 2006 | B2 |
| 7033233 | Fujimoto et al. | Apr 2006 | B2 |
| 7048562 | Lutsch et al. | May 2006 | B2 |
| 7084346 | Pabst | Aug 2006 | B2 |
| 7124501 | Bender | Oct 2006 | B2 |
| 7303426 | Shimirak | Dec 2007 | B2 |
| 7374466 | Onuma et al. | May 2008 | B2 |
| 7413488 | Matsumura | Aug 2008 | B2 |
| 7658654 | Ohyama et al. | Feb 2010 | B2 |
| 7705265 | Asakura et al. | Apr 2010 | B2 |
| 7722394 | Feldman et al. | May 2010 | B2 |
| 7828585 | Kurimoto | Nov 2010 | B2 |
| 8043114 | Kaneko et al. | Oct 2011 | B2 |
| 8267714 | Siemon et al. | Sep 2012 | B2 |
| 8475210 | Wang et al. | Jul 2013 | B2 |
| 8512069 | Kao et al. | Aug 2013 | B2 |
| 8622775 | Takashima et al. | Jan 2014 | B2 |
| 8627996 | Patrikios | Jan 2014 | B2 |
| 20020096352 | Kuwayama et al. | Jul 2002 | A1 |
| 20060091994 | Nelson | May 2006 | A1 |
| 20090218134 | Stroh et al. | Sep 2009 | A1 |
| 20090229880 | Watanabe | Sep 2009 | A1 |
| 20100003867 | Lehmann et al. | Jan 2010 | A1 |
| Number | Date | Country |
|---|---|---|
| 10-12290 | Jan 1998 | JP |
| 2004-207172 | Jul 2004 | JP |
| 2007-12329 | Jan 2007 | JP |
| Entry |
|---|
| International Search Report (PCT/ISA/210), issued by the International Searching Authority in corresponding International Application No. PCT/JP2011/056966 on May 17, 2011. |
| Written Opinion (PCT/ISA/237) of the International Searching Authority, issued in corresponding International Application No. PCT/JP2011/056966 on May 17, 2011. |
| Communication from the Japanese Patent Office dated Feb. 4, 2014, in a counterpart Japanese application No. 2010-066854. |
| Office Action, dated Jul. 7, 2014, issued by the State Intellectual Property Office of the People's Republic of China, in counterpart Chinese Patent Application No. 201180015581.0 y. |
| Number | Date | Country | |
|---|---|---|---|
| 20120329318 A1 | Dec 2012 | US |
