U.S. patent number 3,639,950 [Application Number 04/759,723] was granted by the patent office on 1972-02-08 for latching device.
This patent grant is currently assigned to International Telephone and Telegraph Corporation. Invention is credited to Richard C. Heileman, John M. Leonard, Leland H. Lutz, Melvin A. Ottow, Harlan R. Upstone.
United States Patent |
3,639,950 |
Lutz , et al. |
February 8, 1972 |
LATCHING DEVICE
Abstract
The invention includes a closed loop of a plastic material which
has a projection molded integrally therewith to act as a detent.
The detent is released by squeezing the loop together. The loop is
resilient and springs back for engagement of the detent. The
plastic material has a low-friction, corrosion-resistant surface
for trouble-free detent operation. The loop and projection may be
molded integrally. Thus, the device may be made and assembled
easily and quickly at low cost.
Inventors: |
Lutz; Leland H. (Whittier,
CA), Heileman; Richard C. (Whittier, CA), Upstone; Harlan
R. (Arcadia, CA), Leonard; John M. (Buena Park, CA),
Ottow; Melvin A. (Duarte, CA) |
Assignee: |
International Telephone and
Telegraph Corporation (New York, NY)
|
Family
ID: |
25056717 |
Appl.
No.: |
04/759,723 |
Filed: |
September 13, 1968 |
Current U.S.
Class: |
24/615; 439/827;
439/270; 439/350 |
Current CPC
Class: |
H01R
13/6275 (20130101); F16B 7/00 (20130101); Y10T
24/45529 (20150115) |
Current International
Class: |
F16B
7/00 (20060101); H01R 13/627 (20060101); A44b
017/00 () |
Field of
Search: |
;24/23CF,23F,23SC,230,213,215 ;339/91,91F,91P,74,252P
;285/DIG.22,317,7 ;287/137,53,119,58CT ;306/28
;279/1R,79,80,105,104 ;16/114A,114 ;30/272,320,338,2,293 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
731,887 |
|
Jun 1955 |
|
GB |
|
660,654 |
|
May 1938 |
|
DD |
|
Primary Examiner: Gelak; Bernard A.
Claims
What is claimed is:
1. In a latching arrangement, the combination comprising: first and
second bodies for releasable connection to each other; one of said
bodies having a slot therein, the other of said bodies having a
barrellike portion including an internal recess on an interior wall
of said barrellike portion; and detent means for releasably
interconnecting said bodies, said detent means having a first
projection to releasably fit in said recess, said detent means
being positioned in said slot, said detent means including a member
having leaf spring means fixed in a position to extend under said
projection and urge it into said slot, said member and said leaf
spring means being integrally formed of a closed loop of "Delrin"
plastic having flat, parallel sides, said member and said leaf
spring means thereby being made integrally with one another of the
same material, said first body having longitudinal projections at
opposite ends of said detent means to extend partially over the
ends of said member to retain said detent means inside said slot,
said slot having flat, parallel sidewalls spaced apart to permit
vertical movement of said detent means therein, said first
projection being an integral portion of said member located on the
upper side of said loop and projecting outwardly thereof, said
member also having a second integral projection on the upper side
thereof spaced from said first projection, the plane of said loop
lying substantially along the longitudinal axis of said bodies said
bodies being constructed to allow said second projection to extend
outwardly thereof for manual operation, said second projection
having a transversely serrated upper surface said first body being
movable into said second body and separably connected therein by
engagement of said projection with said recess.
Description
BACKGROUND OF THE INVENTION
This invention relates to means for latching two detachable members
together, and more particularly to a simple, inexpensive
detent.
The invention will have a great many applications other than those
disclosed herein. The invention is therefore not to be limited to
uses to be shown and described. However, the invention has been
found to possess exceptional utility in latching the plug and
socket of a detachable electrical connector together.
In the past it has been the practice to employ small detent means
which include several intricate component parts that are expensive
and require considerable assembly time.
SUMMARY OF THE INVENTION
In accordance with the device of the present invention, the
above-described and other disadvantages of the prior art are
overcome by providing a detent biased by leaf spring means.
It is an outstanding feature of the invention that the detent is
constructed in the form of a projection on a resilient closed loop.
Both projection and loop are fabricated integrally with one
another. One side of the loop acts as the leaf spring means. The
detent is disengaged by squeezing the loop together.
The projection and loop may thus be constructed in one piece by
stamping, extruding, molding, or other simple steps. The one piece
construction thus is inexpensive and requires little assembly
time.
The above-described and other advantages of the invention will be
better understood from the following description when considered in
connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing, which is to be regarded as merely illustrative:
FIG. 1 is a perspective view of the latching device of the present
invention;
FIG. 2 is a longitudinal sectional view of the device located
between the plug and socket of an electrical connector;
FIG. 3 is a similar longitudinal sectional view with the latching
device disengaged; and
FIG 4 is a longitudinal section view of the device with the members
separated.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1 of the drawing, the latching device of the present
invention is indicated at 10. Latching device 10 includes a closed
loop of plastic 11 which has been molded to shape. Loop 11 has an
upper member 12 with projections 13 and 14 molded integrally
therewith. Loop 11 also has a lower member 15 molded integrally
therewith. Lower member 15 acts as leaf spring means to bias
projection 13 upwardly. Loop 11 is thus resilient. Projection 14 is
serrated at 16 for manual operation thereof. Loop 11 is located
inside a vertical or radial slot 17 in an insulator 18 of a
detachable electrical connector. Insulator 18 is substantially
cylindrical. The connector also has a cylindrical barrel 19 fixed
to insulator 18.
Loop 11 has flat parallel slides. That is, it has a uniform
thickness throughout. Slot 17 likewise, has parallel sidewalls
contiguous to loop 11. Member 12 is thus movable vertically in slot
17. The use of plastic loop 11 permits substantially friction-free
movement of loop 11 in slot 17.
As shown in FIG. 2, barrel 19 projects over one end of slot 17 to
retain loop 11 therein. The same is true of an L-shaped ring 20
fixed to insulator 18. The other mateable half of the connector
includes a cylindrical insulator 21 fixed to a cylindrical barrel
22. The barrel 22 has a recess 23 therein to receive projection
13.
Barrel 22 is slideable over ring 20 and projection 13 to mate the
connector. Projection 13 has an inclined surface 24 to facilitate
mating when projection 13 is engaged by the left end of barrel
22.
If desired, barrel 19 may have a slot 25, the sides of which may be
contiguous to projection 14. Alternatively, barrel 22 may have such
a slot. Further, any such slot may be omitted, if desired.
As shown in FIG. 3, the connector may be unmated by placing one's
finger on serrated surface 16 and squeezing loop 11 together
downwardly in slot 17. Projection 13 will then be removed from
recess 23, and barrel 22 with insulator 21 may be removed from the
remainder of the other half of the connector by pulling it to the
right, as viewed in FIGS. 2 and 3.
The manner in which projection 14 and member 12 may be depressed is
shown in FIG. 3.
In accordance with the foregoing, it will be appreciated that the
latching device of the present invention is relatively
uncomplicated and may be fabricated at low cost and assembled in a
short time. In one way, these advantages are achieved by making
loop 11 and all the connections therewith shown in FIG. 1 integral
with one another. That is, all the structure shown in FIG. 1 may be
made of a single piece of plastic. Loop 11 must be resilient.
However, loop 11 may be made of any plastic or metal or any other
material. However, it is a special feature of the invention that a
plastic having a low-friction and/or corrosion-resistant surface is
employed. Alternatively, loop 11 may be made of any resilient
material coated with such a plastic or any other material. In
either case, the plastic may be a fluorocarbon or acetal resin or
polyamide such as that sold under the trade name "Delrin" by the
Dupont Company.
It is also a feature of the invention that device 10 includes a
closed loop 11. This makes it possible to make device 10 small. It
will, nevertheless, have sufficient strength and resilience and
operational stability to perform its function in slot 17.
Note will be taken that device 10 may be located in a slot either
in the plug or in the socket of an electrical connector. Further a
projection may be provided on barrel 22 and a corresponding recess
in member 12. In other words, such a transposition of parts for
projection 13 and recess 23 is to be considered within the scope of
the present invention.
Although device 10 is made of "Delrin" plastic, it may be made of
vinyl or other plastics. Device 10 may be stamped, extruded,
molded, or fabricated in any other convenient manner.
Note will be taken that device 10 may be employed in an electrical
connector. Alternatively, two or three or more such devices may be
employed around the periphery of a connector.
When a plurality of such devices is employed, they may or may not
be equally spaced as desired.
Although it is a special feature of the invention that the parts of
device 10 are molded integrally with one another, according to a
broader concept of the invention, some of the parts may be made
individually and fixed together.
Still further, although it is a feature of the invention that
device 10 includes loop 11 which is closed, in accordance with a
broader concept, loop 11 may be open.
The invention is applicable to devices other than electrical
connectors, and need not be limited to detachable parts cylindrical
in cross section. It is also another feature of the invention that
anyone or more of the embodiments or alternatives shown or
described hereinbefore may be used separately or in any
combination.
Many other changes and modifications will suggest themselves to
those skilled in the art. The invention is, therefore, not limited
to the single embodiment described and illustrated, or to the few
alternatives described, the true scope of the invention being
defined only in the appended claims.
* * * * *