U.S. patent number 3,697,933 [Application Number 05/131,349] was granted by the patent office on 1972-10-10 for connector block.
This patent grant is currently assigned to Berg Electronics, Inc.. Invention is credited to Richard W. Black, Robert F. Evans.
United States Patent |
3,697,933 |
Black , et al. |
October 10, 1972 |
CONNECTOR BLOCK
Abstract
A two row connector block for mounting on a circuit board with
two rows of female terminals extending parallel to the circuit
board and with a contact tail of each terminal in electrical
connection with the circuit board. The terminal cavities in
different rows are located one above the other. An insulating
spacer is provided to prevent accidental short circuit connections
from occurring when contact pins are inserted into the terminals in
the row immediately adjacent the circuit board.
Inventors: |
Black; Richard W. (Manchester,
PA), Evans; Robert F. (Harrisburg, PA) |
Assignee: |
Berg Electronics, Inc. (New
Cumberland, PA)
|
Family
ID: |
22449053 |
Appl.
No.: |
05/131,349 |
Filed: |
April 5, 1971 |
Current U.S.
Class: |
439/686;
439/80 |
Current CPC
Class: |
H01R
12/727 (20130101); H01R 12/716 (20130101) |
Current International
Class: |
H01r 023/24 ();
H05k 001/12 () |
Field of
Search: |
;339/17C,17D,17LC,32,33,176,191M,192,154,156,198,275R,275B,275T,26R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Champion; Marvin A.
Assistant Examiner: Staab; Lawrence J.
Claims
What we claim as our invention is:
1. A connector block comprising an elongate insulating body having
a top surface, a bottom surface and front and back surfaces, a
first row of terminal cavities communicating said front and back
surfaces adjacent said bottom surface, a second row of terminal
cavities communicating said front and back surfaces adjacent said
top surface with each cavity of said second row being located
immediately above a cavity of said first row, first disconnect
terminal means confined in each of said cavities in said first row
including a contact tail extending from the end of a cavity
adjacent said front surface toward and past said bottom surface,
second disconnect terminal means confined in each cavity of said
second row of cavities including a contact tail extending from the
end of a cavity adjacent said back surface past said first row of
cavities and beyond said bottom surface whereby each terminal means
may be secured to a circuit element adjacent said bottom surface,
and insulating means separating said terminal means in said first
row of cavities from said tails of said terminal means in said
second row of cavities.
2. A connector block as in claim 1 including a groove extending
along said back face intersecting each cavity of said first row of
cavities, said insulating means comprising an insulating strip
confined between the bottom of said groove and the contact tails of
said second terminal means.
3. A connector block as in claim 1 including a bore extending
longitudinally along said block and intersecting said second row of
cavities and a locking pin insertable within said second row of
cavities to confine said second terminal means within such
cavities.
4. A connector block as in claim 3 wherein the entire longitudinal
length of said bore is exposed to either the cavities of said
second row of cavities or a surface of the body.
5. A connector block as in claim 1 including rounded ribs formed on
the bottom surface for spacing said connector block from a circuit
board.
6. A connector block comprising an insulating housing, a first row
of cavities in said housing communicating front and back surfaces
thereof, a second row of cavities in said housing communicating
said surfaces and located above said first row of cavities, first
circuit elements confined within the cavities of said first row of
cavities and second circuit elements confined within the cavities
of said second row of cavities, first contact means adjacent said
front surface extending from said first circuit elements outwardly
of the housing for establishing electrical connections with circuit
members, second contact means extending along said back surface
past said first circuit elements and outwardly of the housing for
establishing electrical connections with circuit members, and an
elongate insulating strip extending along said back surface and
separating said first circuit elements from said second contact
means.
7. A connector block comprising an insulating housing, a first row
of cavities within said housing communicating with opposite
exterior surfaces thereof, a second row of cavities in said housing
communicating said surfaces and spaced from said first row of
cavities, first circuit elements confined within the cavities of
said first row of cavities and second circuit elements confined
within the cavities of said second row of cavities, first contact
means extending from said first circuit elements outwardly of the
housing for establishing electrical connections with circuit
members, second contact means extending from said second circuit
elements along one of said surfaces past said first row of circuit
elements and outwardly of the housing for establishing electrical
connections with circuit members, and en elongate insulating strip
extending along said one surface and separating said first circuit
elements from said second circuit means.
Description
The invention relates to a connector block having female disconnect
terminals confined in two rows of cavities formed in the block for
establishing electrical connections with contact pins which are
inserted into the cavities. One row of cavities is above the other
row of cavities. The block is mounted on a circuit board or like
support with the rows of cavities parallel to the top circuit board
surface. Contact or tail portions of the terminals in the row of
cavities adjacent the circuit board extend from the block and into
the board at the end of the cavities through which the pins are
inserted. The contact portions or tails of the terminals in the
second row of cavities located further away from the circuit board
than the first row of cavities, extend from the ends of the
cavities away from the ends through which the pins are inserted
past the first row of cavities and into the circuit board. An
insulating strip is provided between the contact portions of the
terminals in the second row of cavities and the terminals in the
first row of cavities to prevent short circuit electrical
connections from being formed between the terminals in the
different rows by pins inserted into the first cavities.
In one embodiment of the invention preformed disconnect terminals
are confined within the cavities. A locking pin is used to hold the
preformed terminals in the row of cavities in the connector block.
In another embodiment disconnect contact portions are confined
within the cavities together with separate springs which are used
to bias male contacts inserted within the cavities against the
disconnect contact portions. The use of integral preformed
terminals has certain advantages where the mating male pins are
relatively small in cross section and the use of the two part
spring and contact is advantageous where the male contacts are
relatively large in cross section. In either embodiment of the
invention, the bottom surface of the connector block may be
provided with rounded ridges to space the same from the circuit
board and permit cleaning of flux from the circuit board subsequent
to soldering.
Other objects and features of the invention will become apparent as
the description proceeds, especially when taken in conjunction with
the accompanying drawings illustrating the invention, of which
there are five sheets.
IN THE DRAWINGS
FIG. 1 is a perspective view of a connector block and a pin board
which is inserted into the block;
FIG. 2 is a sectional view taken through the connector block with
the pin board inserted into the block;
FIG. 3 is a top view of FIG. 2;
FIGS. 4 and 5 are front and rear views respectively of the
connector block;
FIGS. 6 and 7 are front and rear views respectively of a
modification of the connector block;
FIG. 8 is a sectional view taken through the connector block of
FIGS. 6 and 7;
FIG. 9 is a sectional view taken along line 9--9 of FIG. 6;
FIG. 10 is a perspective view of the insulating block of the
embodiment of FIG. 6 and 7; and
FIGS. 11 and 12 are sectional views taken along lines 11--11 and
12--12 of FIG. 7.
A connector block 10 includes an elongate molded plastic insulating
housing 12 having a rectangular cross section and top face 14,
bottom face 16 and front face 18 and back face 20. A first row 22
of terminal receiving cavities 24 extends along the bottom of body
12 adjacent face 16. The cavities 24 run between the front and back
faces 18 and 20. Each cavity includes a terminal stop 26 adjacent
face 18 for limiting insertion of the terminal in the cavity. The
cavity mouth 28 adjacent stop 26 is bevelled to provide a leadin
for a male contact pin which is inserted into the cavity. A female
disconnect terminal 30, which may be of the type disclosed in U.S.
Pat. No. 3,370,265, is inserted into each cavity 24 from the
opening at rear face 20 so that the terminal abuts stop 26 and
terminal contact tang 32 extends past the stop and outwardly of
body 12. The tang 32 is then bent down through an angle of
approximately 90.degree. so that it is confined in a groove 34
formed in the bottom of the cavity 24 adjacent front face 18. Tang
32 extends outwardly past bottom surface 16. With the tang 32 bent
down as described, the terminal 30 is confined within cavity
24.
The body 12 is provided with a second row 36 of terminal cavities
38 located above row 22 and adjacent to top surface 14. Each cavity
38 is located immediately above a cavity 24 and is provided with a
terminal stop 40 similar to stop 26. Stop 40 is bevelled adjacent
the lead receiving end of cavity 38 to provide a contact pin leadin
42. A disconnect terminal 44, which again may be of the type
disclosed in U.S. Pat. No. 3,370,265, is inserted into each cavity
38 through opening 46 thereof in wall 20 until the lead end of the
terminal abuts stop 40. Terminals 44 are provided with contact
tails 48 which project from the end of the terminal adjacent
opening 46. After the terminals have been inserted, the tails 48
are bent down through an angle of 90.degree. so that they are
positioned in grooves 50 formed in back face 20. Each groove 50
extends from a terminal recess 38 to the top of recess 24 located
beneath the recess 38. An extension 52 of groove 50 extends from
the bottom of each recess 24 to bottom wall 16.
Pin bore 54 extends the length of body 12 and intersects the top of
each terminal cavity 38 adjacent end 46 thereof. Windows 56
communicate the bore with the body top 14 between adjacent terminal
cavities 38 and extend longitudinally into the cavities to a slight
extent. Thus, the entire longitudinal extent of the bore 54
communicates with either the top 14 of body 12 through windows 56
or with the interior of cavities 38. Body 14 is preferably formed
of a plastic by a molding operation. Bore 54 is formed by mold
parts which extend through windows and into the bore during
molding.
After the terminals 44 have been inserted into the cavities 38,
plastic locking pin 58 is inserted through bore 54 behind the edge
of the terminals adjacent cavity end 46 so as to lock the terminals
within the cavities 38. Locking pin 58 may be provided with a head
60 which rests flush on one end of the block when the pin is fully
inserted. The pin 58 is visible from the top of the block through
windows 56 when inserted.
An elongate flat insulating bar 62 is positioned in a groove 64
formed in back face 20 along the openings of recesses 24. The
insulating strip 62 is held in place in groove 64 by the tangs 48
of terminals 44 which are located outwardly of the strip. Strip 62
is provided to insulate tangs 48 from pins which may be
overinserted into cavities 24 to establish electrical connections
with terminals 30. The strip prevent the leads from contacting
tangs 48 and thus prevents short circuit connections with terminals
44.
Block 10 may be mounted on circuit board 66 with tangs 32 and 48
extending through holes in the board so that they may be solder
connected to contact pads 68 and 70 on the bottom of the board. The
bottom surface 16 of the block is spaced from the board by
crosswise extending curved ridges 72 to facilitate removal of flux
from between the board and the block after soldering.
Block 10 is used for forming disconnect electrical connections
between circuitry on board 66 and two rows of contact pins 74
carried on board 76. The electrical connections are formed by
inserting lead ends of pins 74 within the open ends 78 and 80 of
cavities 24 and 38 and then pushing the board 76 toward the block
10 so that the pins 74 are guided along leadins 28 and 42 into
electrical connection with terminals 30 and 44.
Connector block 10 is particularly adapted for mounting on a
circuit board to receive miniature contact pins 74. In contrast
thereto, similar connector block 90 illustrated in FIGS. 6 thru 10,
is adapted to mate with larger wire wrap contact pins 92 each being
conventionally square with a cross section of 0.025 inches on a
side.
The block 90 includes a molded plastic body 94 similar to body 12
having a top face 96, a bottom face 98 and front and rear faces 100
and 102. Two rows 104 and 106 of terminal cavities 108 and 110
extend longitudinally along body 94 with each cavity 108 and 110
communicating the front and rear body faces 100 and 102. The
openings of the cavities 108 and 110 in front face 100 are provided
with bevelled leadins 112 and 114. As in body 12, a groove 116
extends from the end of the lower cavities 108 adjacent front face
100 to bottom face 98 and a groove 118 extends from the opening of
each upper cavity 110 with rear face 102 along the face to the
junction with the cavity 108 located beneath the cavity 110. A
continuation 120 of groove 118 extends from each cavity 108 to the
bottom face 98.
Grooves 122 are formed in the side walls 124, 126 of each cavity
108 and 110 adjacent the top and bottom cavity walls 128 and 130.
Locking recesses 132 are located at each end of each groove 122 and
are joined to the grooves by locking shoulders 134.
An electrical contact 136 comprises a flat contact body 138 with an
upwardly bowed contact ridge 140 formed in the median portion
thereof and a pair of flexible latch fingers 142 formed on the free
end thereof. Each finger 142 includes a latch surface 144 which
faces away from the free end of the terminal. A square wire wrap
tail 146 extends away from the other end of the contact body at an
angle of 90.degree. therefrom. The contacts 136 are mounted in the
bottom of cavities 108 by inserting bodies 136 into the cavities
through the openings at faces 100 with the edges of the bodies
confined within the bottom grooves 122. During insertion the latch
fingers 142 are bent inwardly toward each other until the contact
is fully inserted at which time the latch surface 144 snaps back
past the shoulders 134 and into recesses 132 to confine the
contacts within the cavities 108. When fully inserted the portion
of the contact joining the body and tail 146 is seated within
groove 116 and the tail projects perpendicularly away from bottom
surface 98.
Spring member 148 is provided with flat body portion 150 having a
pair of latch fingers 152 at each end. Each finger has a latch
surface 154 at the free end thereof. The fingers and latch surfaces
152 and 154 may be identical to the fingers and surfaces 142 and
144 of contact 136. A curved cantilever spring 156 is formed from
the central portion of body 150 and projects to one side of the
body. The spring member 148 is inserted into cavity 108 through
either end thereof by positioning it within grooves 122 at the top
of the cavity and then inserting it so that the fingers 152 at the
lead end are flexed inwardly and when fully inserted snap back into
recess 132 behind latch surface 134. When fully inserted the latch
surface 154 at each end of the spring are locked behind latch
surfaces 134 at each end of the cavity to confine the spring
therein. The spring is inserted into the cavity so that the free
end of the cantilever spring 156 extends away from front surface
100. A groove 158 extends along the lower face 102 of block 94 at
the mouths of cavities 108, and elongate insulating strip 160 is
confined within groove 158.
The upper cavities 110 are each provided with a spring 162 in the
top of the cavity identical to the spring 148 in cavities 108. A
contact 164 includes a wire wrap tail 166 and a flat body portion
168 having a contact ridge 170 formed in the median portion thereof
and a pair of resilient latching fingers 172 formed at the free end
of the body. The contacts 164 are inserted into cavities 110
through the cavity opening at the rear face 102 by positioning the
contact fingers 172 in the grooves 122 at the bottom of the cavity
and then moving the contacts 164 into the cavity so that when fully
inserted the latch surface 174 on fingers 172 have snapped back
behind the latch surfaces 134 at the ends of grooves 122 adjacent
the front face 100 to confine the contacts within the cavities.
When fully inserted the portion of the contacts 164 joining body
168 and the wire wrap tails 166 are seated in grooves 118 and the
tails 166 are seated in the grooves 120 so that the insulating
strip 160 is confined within the groove 158 and the contacts 164
are insulated from the interior of cavities 108.
As indicated in the drawings, the cantilever springs 156 in each
cavity 108, 110 are located immediately opposite the contact ridges
140, 170 so that when the rows of wire wrap pins 92 are inserted
into the cavities, the springs are deflected to hold the contact
pins 92 in electrical engagement with the contact ridges. As
indicated the block 90 may be mounted on a circuit board 178 and
solder connections may be formed between the wire wrap pins 146 and
168 and printed circuitry 170, 172 on the board. Wire wrap
connections or disconnect terminals may be used to form electrical
connections with the free ends of tails 146 and 166 as desired.
In connector block 90 it is desirable to form the contacts and
springs from separate pieces of metal. In this way the
manufacturing processes required for each member can be more
accurately controlled and both members need not be subjected to a
manufacturing process required for a single member. For instance,
it is desirable to heat treat the springs thereby assuring that the
cantilever springs provide a high pressure contact between the
inserted pin and the contact ridge. Heat treating of contacts would
increase the brittleness thereof and render it difficult to perform
any subsequent forming operations on the contacts. By utilizing
independent springs and contacts, it is possible to alter the
geometry and performance characteristics of a spring or contact
without changing the other and thus reducing the cost of modifying
the block to accommodate different types of male contacts and to
meet different requirements.
Connector block 90 may be provided with spacing ridges in the
bottom faces 98 thereof in order to space the block from a circuit
board to facilitate flux removal. In either of the blocks 10 or 90
the contact portions which extend below the connector block for
establishing electrical connection with circuit elements may be
solder tangs as disclosed in block 10, wire wrap tails as disclosed
in block 90 or other forms of contacts depending upon the
requirement for the block.
While we have illustrated and described preferred embodiments of
our invention, it is understood that these are capable of
modification, and we therefore do not wish to be limited to the
precise details set forth, but desire to avail ourselves of such
changes and alterations as fall within the purview of the following
claims.
* * * * *