CA1085479A - One piece electrical terminal with a socket portion for receiving an electrical lead - Google Patents
One piece electrical terminal with a socket portion for receiving an electrical leadInfo
- Publication number
- CA1085479A CA1085479A CA295,869A CA295869A CA1085479A CA 1085479 A CA1085479 A CA 1085479A CA 295869 A CA295869 A CA 295869A CA 1085479 A CA1085479 A CA 1085479A
- Authority
- CA
- Canada
- Prior art keywords
- socket portion
- contact spring
- terminal
- socket
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
- Multi-Conductor Connections (AREA)
Abstract
ABSTRACT
An electrical terminal stamped and formed from a single piece of sheet metal and comprising a socket portion for receiving an electrical lead, the socket portion being in the form of a tube having one end for receipt of the electrical lead, includes a contact spring which is reversely bent within the socket portion thereby to be substantially U-shaped with a free end portion extending towards the one end of the socket portion, the wall of the socket portion being formed with an inwardly directed protection which together with a free end portion of the contact spring defines a lead-receiving and gripping neck within the socket portion.
An electrical terminal stamped and formed from a single piece of sheet metal and comprising a socket portion for receiving an electrical lead, the socket portion being in the form of a tube having one end for receipt of the electrical lead, includes a contact spring which is reversely bent within the socket portion thereby to be substantially U-shaped with a free end portion extending towards the one end of the socket portion, the wall of the socket portion being formed with an inwardly directed protection which together with a free end portion of the contact spring defines a lead-receiving and gripping neck within the socket portion.
Description
1~85~7~ 4764 .
This invention relates to an electrical terminal, and particularly ~ut not exclusively to an electrlcal terminal for mountin~ in a hole in a substrate such as a ~' printed circuit board, and for receiving an electrical lead such as a lead of an integrated electronic clrcuit package, thereby electrically to connect the lead to a conductor on the substrate.
Such a terminal is known, which is stamped and formed from a sinyle piece of sheet metal and comprises a socket portion for receiving an electrlcal lead, the socket portion being in the form of a tube having one end J for receipt of the electrical lead.
According to this in~ention, such an electrical terminal includes a contact spring extending within the socket portion from the wall of the socket portion towards the other end of the socket portion, the contact spring being reversely bent within the socket portion thereby ; to be substantially U-shaped with a free end portion extending towards the one end of the socket portion, 20~ the wall of the socket por~ion from which the contact spring extends being formed with an inwardly directed projection between the root of the contact spring and the one end of the socket portion, the projection and a free end portion of the contact spring together defining ~ 25 a lead-receiving and gripping neck within the socket ;. portion.
This inventi.on will now be described, by way of . - 2 -. ' .
.
.
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~ 547~ 476~
example, w.ith reference to the drawings, in which:-Figure 1 is a sectional side elevational view of a term.inal according to this invention, mounted i.n a hole in a substrate;
Figure 2 is a view on the line II - II in Figure l;
Figure 3 is a view of the opposite side of the .
terminal to that shown in Figure 2;
:~, Figure 4 is a vie-. on the line IV - IV in Figure 3;
` Figure 5 is a view on the line V - V in Figure . 3; and Figure 6 i5 a perspective view illustrating use r of the terminal of Figures 1 to 5.
. 15 Referring first to Figure 6, this shows two terminals 1 in accordance with this invention, being .s . mounted in holes 2 in a printed circuit board substrate 3 to electrically connect conductors 4 on the substrate s 3 to leads 5 on an--integrated electronic circuit package ~ 20 6. Each terminal 1 comprises a socket portion 7 for .} receiviny a lead 5, joined by a transition portion 8, ' to a mounting portion 9 for receipt in a hole 2 in the substrate 3.
. Referring now to Figures 1 to 5, each terminal 1 is stamped and formed from a single piece of sheet metal.
The socket portion 7 is in the form of a , ~, ., .
, , : .
i~5~7~
su~stantially rectangular cross-section tube having an axially extending open seam 10 at one corner, one end of the tube (upper end in the drawings) being for receipt of the lead 5, and the transition portion 8 and mounting portion 9 extendi.ng from the other end of the tube.
A contact spring 11 e~tends from the wall 12 of and within the socket portion 7 towards the other (lower in the drawings) end of the socket portion 7, the contact spring 11 being reversely bent within the socket portion 7 thereby to be substantially U-shaped as clearly shown in Figure 1. A free end portion 13 of the contact spring 11 extends towards the one (upper in the drawings) end of the socket portion 7, and is bent to . lS extend into a hole 14 formed in the wall 15 of the socket portion 7 opposite the wall 12 from which the .. contact spring 11 extends.
, The wall 12 of the socket portion 7 is formed with : an inwardly directed projection 16 between the root 17 ; 20 of the contact spring 11 and the one end of the socket portion 7. The projection 16 and the free end portion 13 of the contact spring 11 together define a : lead-receiving and grippi.ng neck 18 (Figure 1~ having a flared mouth opening towards the one end of the socket portion 7 serving to guide an inserted lead 5 into the neck 18. On such insertion, the bight 19 of the contact spring 11 acts as a stop limiting insertion of the lead .
. - .
... .
. . .
~5~ 4764 5. Further, if an oversize lead or other object is inserted the contact spring 11 will be urged into :~ enga~ement with the wall 15 which thus serves to prevent over-stressing of the contact spring 11.
The transition portion 8 of the terminal 1 is formed by the wall 15 and the two adjacent walls 20 and , 21 of the socket portion 7, which are reduced in width j as shown in Figure 1, and are formed inwardly towards each other as shown in Fi~ure 2. The walls 20 and 21 .J 10 are also formed with shoulders 22 facing away from the socket portion 7, which shoulders 22 serve to limit insertion of the terminal 1 into the hole 2 in the substrate 3 by engagement with the surface of the substrate.
The transition portion 8 leads into the mounting -- portion 9 which, as clearly shown in Figure 5, is substantially V-shaped in cross-section, and of uniform ~ size over a length substantially equal to the thickness ; of the substrate 3 (see Figures 1 and 2) whereafter it ~ 20 tapers towards its bight 23 to provide for reliable i guiding of the mounting portion 9 into the hole 2 in the ~; substrate 3.
Preferably, as shown in Figure 2, the inside 6 surface of the transition portion 8 is provided with a .` 25 coating 24 of a substance, such as chromium, which is " resistant to wetting by solder in order to prevent solder flow up into the socket portion 7 when the .~. .
- 5 - .
., . . ~
. ~ ~
;, ., 3~7 ~ 4764 terminal is soldered into the hole 2 in the substate 3.
The solder ~ill instead be induced to flow out over the surface of the conductor 4 on the upper (as seen in the drawings) surface of the substrate 3, as shown in Figures 1 and 2.
The V-shaped cross-section of the mounting portion 9 is also advanta~eous in that it will grip the surface , of the hole 2 in the substrate 3 prior to soldering, thus keeping the termi.nal stable in the required position, and also in that it provides three passages between the arms (walls 20 and 21) of the mounting portion.9 and the wall of the hole 2 in the substrate 3 permitting solder to flow about the complete periphery ; of the terminal on the conductor 4 on the upper (as seen !
in the drawing) surface of the substrate 3 during wave soldering of the terminal to the substrate.
.
. , .
. .
., .. 6 - :
., '-- ~ ~ .
This invention relates to an electrical terminal, and particularly ~ut not exclusively to an electrlcal terminal for mountin~ in a hole in a substrate such as a ~' printed circuit board, and for receiving an electrical lead such as a lead of an integrated electronic clrcuit package, thereby electrically to connect the lead to a conductor on the substrate.
Such a terminal is known, which is stamped and formed from a sinyle piece of sheet metal and comprises a socket portion for receiving an electrlcal lead, the socket portion being in the form of a tube having one end J for receipt of the electrical lead.
According to this in~ention, such an electrical terminal includes a contact spring extending within the socket portion from the wall of the socket portion towards the other end of the socket portion, the contact spring being reversely bent within the socket portion thereby ; to be substantially U-shaped with a free end portion extending towards the one end of the socket portion, 20~ the wall of the socket por~ion from which the contact spring extends being formed with an inwardly directed projection between the root of the contact spring and the one end of the socket portion, the projection and a free end portion of the contact spring together defining ~ 25 a lead-receiving and gripping neck within the socket ;. portion.
This inventi.on will now be described, by way of . - 2 -. ' .
.
.
' ~, '. ~ :
- .
. , ~ , .
~ 547~ 476~
example, w.ith reference to the drawings, in which:-Figure 1 is a sectional side elevational view of a term.inal according to this invention, mounted i.n a hole in a substrate;
Figure 2 is a view on the line II - II in Figure l;
Figure 3 is a view of the opposite side of the .
terminal to that shown in Figure 2;
:~, Figure 4 is a vie-. on the line IV - IV in Figure 3;
` Figure 5 is a view on the line V - V in Figure . 3; and Figure 6 i5 a perspective view illustrating use r of the terminal of Figures 1 to 5.
. 15 Referring first to Figure 6, this shows two terminals 1 in accordance with this invention, being .s . mounted in holes 2 in a printed circuit board substrate 3 to electrically connect conductors 4 on the substrate s 3 to leads 5 on an--integrated electronic circuit package ~ 20 6. Each terminal 1 comprises a socket portion 7 for .} receiviny a lead 5, joined by a transition portion 8, ' to a mounting portion 9 for receipt in a hole 2 in the substrate 3.
. Referring now to Figures 1 to 5, each terminal 1 is stamped and formed from a single piece of sheet metal.
The socket portion 7 is in the form of a , ~, ., .
, , : .
i~5~7~
su~stantially rectangular cross-section tube having an axially extending open seam 10 at one corner, one end of the tube (upper end in the drawings) being for receipt of the lead 5, and the transition portion 8 and mounting portion 9 extendi.ng from the other end of the tube.
A contact spring 11 e~tends from the wall 12 of and within the socket portion 7 towards the other (lower in the drawings) end of the socket portion 7, the contact spring 11 being reversely bent within the socket portion 7 thereby to be substantially U-shaped as clearly shown in Figure 1. A free end portion 13 of the contact spring 11 extends towards the one (upper in the drawings) end of the socket portion 7, and is bent to . lS extend into a hole 14 formed in the wall 15 of the socket portion 7 opposite the wall 12 from which the .. contact spring 11 extends.
, The wall 12 of the socket portion 7 is formed with : an inwardly directed projection 16 between the root 17 ; 20 of the contact spring 11 and the one end of the socket portion 7. The projection 16 and the free end portion 13 of the contact spring 11 together define a : lead-receiving and grippi.ng neck 18 (Figure 1~ having a flared mouth opening towards the one end of the socket portion 7 serving to guide an inserted lead 5 into the neck 18. On such insertion, the bight 19 of the contact spring 11 acts as a stop limiting insertion of the lead .
. - .
... .
. . .
~5~ 4764 5. Further, if an oversize lead or other object is inserted the contact spring 11 will be urged into :~ enga~ement with the wall 15 which thus serves to prevent over-stressing of the contact spring 11.
The transition portion 8 of the terminal 1 is formed by the wall 15 and the two adjacent walls 20 and , 21 of the socket portion 7, which are reduced in width j as shown in Figure 1, and are formed inwardly towards each other as shown in Fi~ure 2. The walls 20 and 21 .J 10 are also formed with shoulders 22 facing away from the socket portion 7, which shoulders 22 serve to limit insertion of the terminal 1 into the hole 2 in the substrate 3 by engagement with the surface of the substrate.
The transition portion 8 leads into the mounting -- portion 9 which, as clearly shown in Figure 5, is substantially V-shaped in cross-section, and of uniform ~ size over a length substantially equal to the thickness ; of the substrate 3 (see Figures 1 and 2) whereafter it ~ 20 tapers towards its bight 23 to provide for reliable i guiding of the mounting portion 9 into the hole 2 in the ~; substrate 3.
Preferably, as shown in Figure 2, the inside 6 surface of the transition portion 8 is provided with a .` 25 coating 24 of a substance, such as chromium, which is " resistant to wetting by solder in order to prevent solder flow up into the socket portion 7 when the .~. .
- 5 - .
., . . ~
. ~ ~
;, ., 3~7 ~ 4764 terminal is soldered into the hole 2 in the substate 3.
The solder ~ill instead be induced to flow out over the surface of the conductor 4 on the upper (as seen in the drawings) surface of the substrate 3, as shown in Figures 1 and 2.
The V-shaped cross-section of the mounting portion 9 is also advanta~eous in that it will grip the surface , of the hole 2 in the substrate 3 prior to soldering, thus keeping the termi.nal stable in the required position, and also in that it provides three passages between the arms (walls 20 and 21) of the mounting portion.9 and the wall of the hole 2 in the substrate 3 permitting solder to flow about the complete periphery ; of the terminal on the conductor 4 on the upper (as seen !
in the drawing) surface of the substrate 3 during wave soldering of the terminal to the substrate.
.
. , .
. .
., .. 6 - :
., '-- ~ ~ .
Claims (5)
1. An electrical terminal stamped and formed from a single piece of sheet metal and comprising a socket portion for receiving an electrical lead, the socket portion being in the form of a tube having one end for receipt of the electrical lead, including a contact spring extending within the socket portion from the wall of the socket portion towards the other end of the socket portion, the contact spring being reversely bent within the socket portion thereby to be substantially U-shaped with a free end portion extending towards the one end of the socket portion, the wall of the socket portion from which the contact spring extends being formed with an inwardly directed projection between the root of the contact spring and the one end of the socket portion, the projection and a free end portion of the contact spring together defining a lead-receiving and gripping neck within the socket portion.
2. A terminal as claimed in Claim 1, in which the free end of the contact spring extends into a hole in the wall of the socket portion opposite to the wall from which the contact spring extends.
3. A terminal as claimed in Claim 1, including a mounting portion for receipt in a hole in a substrate, extending from the other end of the socket portion.
4. A terminal as claimed in Claim 3, in which the mounting portion is substantially V-shaped in cross-section.
5. A terminal as claimed in Claim 3 or Claim 4, in which between the socket portion and the mounting portion there is a transition portion providing shoulders limiting insertion of the mounting portion into a hole in a substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA295,869A CA1085479A (en) | 1978-01-30 | 1978-01-30 | One piece electrical terminal with a socket portion for receiving an electrical lead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA295,869A CA1085479A (en) | 1978-01-30 | 1978-01-30 | One piece electrical terminal with a socket portion for receiving an electrical lead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1085479A true CA1085479A (en) | 1980-09-09 |
Family
ID=4110652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA295,869A Expired CA1085479A (en) | 1978-01-30 | 1978-01-30 | One piece electrical terminal with a socket portion for receiving an electrical lead |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1085479A (en) |
-
1978
- 1978-01-30 CA CA295,869A patent/CA1085479A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |