U.S. patent number 3,639,885 [Application Number 04/874,128] was granted by the patent office on 1972-02-01 for distribution device.
This patent grant is currently assigned to Matsushita Denko Kabushiki Kaisha. Invention is credited to Yoshiyuki Ishida, Masamichi Ito, Yoshio Yoshiya.
United States Patent |
3,639,885 |
Yoshiya , et al. |
February 1, 1972 |
DISTRIBUTION DEVICE
Abstract
A distribution device for distributing electric power comprising
a duct including a pair of opposing conductors respectively
extending over the length of the duct and connected to an electric
source, and a plug detachably mounted to the duct for transmitting
the power from the conductors through a pair of contactors of the
plug to an associated equipment. Each of the contactors of the plug
as inserted between the opposing conductors of the duct is
resiliently pressed to each of the conductors in opposite direction
to each other when mounted. The plug has a means to resiliently
clamp its body to the duct, for allowing the plug to be moved along
the duct while keeping the contactors in their resilient contacting
position with the conductors.
Inventors: |
Yoshiya; Yoshio (Kodoma,
JA), Ishida; Yoshiyuki (Kodoma, JA), Ito;
Masamichi (Kodoma, JA) |
Assignee: |
Matsushita Denko Kabushiki
Kaisha (Osaka, JA)
|
Family
ID: |
27459355 |
Appl.
No.: |
04/874,128 |
Filed: |
November 5, 1969 |
Foreign Application Priority Data
|
|
|
|
|
Nov 11, 1968 [JA] |
|
|
43/98274 |
Nov 28, 1968 [JA] |
|
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43/103742 |
Nov 11, 1968 [JA] |
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44/30957 |
May 12, 1969 [JA] |
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|
44/43314 |
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Current U.S.
Class: |
439/118 |
Current CPC
Class: |
H01R
25/142 (20130101) |
Current International
Class: |
H01R
25/00 (20060101); H01R 25/14 (20060101); H01r
009/12 () |
Field of
Search: |
;339/14,20--24,119 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Champion; Marvin A.
Assistant Examiner: Hafer; Robert A.
Claims
What is claimed is:
1. A distribution device comprising a combination of a duct
containing conductor members connected to an electric source and a
plug connected to an electric equipment or apparatus and mounted
detachably to said duct; said duct comprising a pair of conductor
members arranged to oppose each other as spaced by a proper
distance, and insulating member holding therein said conductor
members in said arrangement and having a longitudinal opening
between said pair of opposing conductor members, and a
channel-shape housing containing said insulating member and having
a longitudinal slit in alignment with said opening of the
insulating member; and said plug comprising a top member of an
insulative material to be bridged between said pair of opposing
conductor members of the duct within said longitudinal slit of said
housing when the plug is mounted to the duct, a pair of contacting
members of a resilient plate material secured to opposite sides of
said top member for making electrical contact with said conductor
members of the duct, said resilient contacting members being formed
in a U-shape and fitted respectively at each forward end of
laterally extending arms provided integrally at the top portion of
an insulative material of the plug with an end fixed to the arm and
connected to electric wire and with the other end kept free, so
that each arcuate end of the contacting members will resiliently
engage one of the conductor members, said resilient contacting
members being secured to said top member so that the resiliency
thereof biases said contacting members away from each other and
into engagement with said conductor members along an a six
transverse to the axis of said conductor members and the
longitudinal axis of said plug said contacting members being
electrically connected to electrical leads for connecting said plug
to said electrical equipment, a mounting means provided on the plug
body for longitudinal sliding movement and normally biased
longitudinally toward the top portion of the plug for resiliently
clamping peripheral edges of said slit of the duct between the
mounting means and said top portion of the plug so that the plug
will be movable along the slit of the duct while the resilient
contact of the contacting members with the conductor members is
maintained, said mounting means also including a pair of latching
elements adapted to fit within said longitudinal slit for blocking
rotational and traverse movement of said mounting means relative to
said housing and said conductor members while permitting
longitudinal movement of said mounting means relative to said
conductor members.
2. A distribution device as set forth in claim 1 wherein said plug
comprises a mounting member movably fitted on the plug body and
normally biased toward the lower end of said top portion by means
of a spring contained in the plug body, and an operating member
movably fitted on the plug body so to be capable of locking said
mounting member at its biased position clamping peripheral edges of
the slit of the duct between the mounting member and the top
portion of the plug when the operating member is retained in its
position butted to the other end of the mounting member, said
capable of allowing the mounting member to be resiliently movable
when the operating member is mounted at its position spaced from
the mounting member.
3. A distribution device comprising a combination of a duct
containing conductor members connected to an electric source and a
plug connected to an electric equipment or apparatus and mounted
detachably to said duct; said duct comprising a pair of conductor
members arranged to oppose each other as spaced by a proper
distance, an insulating member holding therein said conductor
members in said arrangement and having a longitudinal opening
between said pair of opposing conductor members, and a
channel-shaped housing containing said insulating member and having
a longitudinal slit in alignment with said opening of said
insulating member; and said plug comprising a top member of an
insulative material to be bridged between said pair of opposing
conductor members of the duct within said longitudinal slit of said
housing when the plug is mounted to the duct, a pair of said top
member for making electrical contact with said conductor members of
the duct, said resilient contacting members being formed in a
U-shape and fitted respectively at each forward end of laterally
extending arms provided integrally at the top portion of an
insulative material of the plug with an end extending into axial
hole of the plug for passing therethrough associated electric wires
with the members and with the other end kept free around said arm
so that each arcuate end of the contacting members will resiliently
engage one of the conductor members, and said extended ends of the
contacting members are fixed in said hole as separated by an
insulative separator inserted between the extended ends in the
hole, said resilient contacting members being secured to said top
member so that the resiliency thereof biases said contacting member
away from each other and into engagement with said conductor
members along an axis transverse to the axis of said conductor
members and the longitudinal axis of said plug, said contacting
members being electrically connected to said electrical wires for
connecting said plug to said electric equipment, a mounting means
provided on the plug body for longitudinal sliding movement and
normally biased longitudinally toward the top portion of the plug
for resiliently clamping peripheral edges of said slit of the duct
between the mounting means and said top portion of the plug so that
the plug will be movable along the slit of the duct while the
resilient contact of the contacting members with the conductor
members is maintained, said mounting means also including a pair of
latching elements adapted to fit within said longitudinal slit for
blocking rotational and transverse movement of said mounting means
relative to said housing and said conductor members while
permitting longitudinal movement of said mounting means relative to
said conductor members.
Description
This invention relates to electricity distribution devices and,
more particularly, to the distribution device in which distributing
plug detachably mounted for connection to channel-shape
distribution rail or duct is made to be movable in its mounted
state.
In conventional distributing devices, contacting state of
pin-shaped contactor of the distributing plug with conductors in
the distribution rail has been unstable when the plug was moved
along the duct as it was mounted to the duct, the conductors have
been readily worn out by the contactor and, therefore, it has been
difficult to have the plug moved along the duct at its mounted
state to the distribution duct. These defects have been inherent to
their structure of the conventional devices, since such devices
comprise the distribution rail or duct containing a pair of
conductors respectively arranged horizontally on each inner surface
of opposing slit edges of a slit, and the distributing plug
including a contactor portion having pin-shaped contactors at lower
surfaces of respective ends of lateral projections formed at upper
part of an insulative collector tube having a mounting member
provided with a flange part adapted to move in axial directions of
the tube, which movement is restricted by an operating screw ring,
and the tube is mounted to the duct in such manner that the
pin-shaped contactors opposing to the respective conductors of the
duct will be brought into horizontal contact with the conductors,
respectively, and thereafter the mounting member of the plug will
be axially moved toward the duct by rotating the operating screw
ring so as to press the mounting member to lower surface of the
duct and thereby the plug will be fixed to the latter. Thus, in
order to move the plug along the duct, the mounting member has
first had to be loosened and consequently the horizontal contact of
the contactors with the conductors has had to be also loosened.
According to the present invention, a pair of conductor members is
arranged vertically in the distribution duct so as to oppose to
each other in horizontal direction, the electricity collecting tube
of the distributing plug is provided with a pair of contactor
members at both side ends of the upper portion of the tube, which
members are so arranged as to be provide with a spring action in
horizontal direction, and the distributing plug is provided with a
mounting member which is given normally an upward axial resiliency,
so that, when the plug is mounted to the duct, the contactor
members will be resiliently engage the conductor members in
vertical relation thereto and the mounting member will also
resiliently engage lower surface of the distribution duct so as to
hold the plug-in its mounted position. With the above arrangement,
the present invention has solved the defects of conventional
devices as referred to in the above.
It is an object of the present invention to provide a distribution
device in which it is made possible to have the distributing plug
freely slided during the same is resiliently mounted to the
distribution duct and, thus, while the conducting state is
maintained, and to fix the plug at any desired position along the
duct.
Other objects and advantages of the invention will become apparent
from the following detailed description of preferred embodiments of
the present invention taken in conjunction with the accompanying
drawings, in which:
FIG. 1 is a perspective view of the distribution device according
to the present invention showing the distributing plug before
mounted to the distribution duct.
FIG. 2 is a perspective view of the plug as disassembled.
FIGS. 3 and 4 show states in which the plug is mounted to the duct
and, specifically, FIG. 3 is a vertical view of the state before
the plug is fastened and FIG. 4 is the state where the plug is
fastened.
FIGS. 5 through 8 show another embodiment of the plug and,
specifically, FIG. 5 is a vertically sectioned view thereof, FIG. 6
is a perspective view of head part thereof as disassembled, and
FIGS. 7 and 8 are plan views showing noncontacting and contacting
states of the contactors and conductor members, respectively.
FIGS. 9 and 10 show a further embodiment of the plug and,
specifically, FIG. 9 is a partly sectioned vertical view of the
plug as mounted to the distribution duct and FIG. 10 is a
perspective view of head part of the plug as disassembled.
While the present invention shall be explained with reference to
certain preferable embodiments as illustrated, it will be
understood that the invention should not be limited to the
particular embodiments but rather include all modifications,
alterations and equivalent arrangements to be included in the scope
of the appended claims.
Turning to the drawings, FIGS. 1 through 4 show a first embodiment
of the present invention. In the drawings, P is a distributing
plug. As will be best seen in FIG. 2, the plug P comprises
substantially four parts, first of which is an electricity
collecting tube 1 made of a molded synthetic resin tube of a
plastic or the like and provided at its upper part with projections
2 formed symmetrically at both sides of a protuberant part 3. The
tube has a boss 4 projected below the part 3, a thread 5 around
lower part periphery and a through hole 6 at the center for passing
electric source wires therethrough. 7 is a contacting member made
of such electroconductive material as phosphor bronze plate or the
like as bent in a U-shape so as to have an arcuate portion a and to
be provided with inwardly compressing resiliency. The contacting
member 7 will be mounted at each of the projections 2 so as to
cover its forward end with the arcuate portion a. An end of the
member 7 will be fixed to a sidewall of the projection 2 so that
the other end will be freely slidable along the opposite sidewall
of the same projection 2 and thus the arcuate portion 2 will
provide a spring action in horizontal lateral direction. The
contactor members 7 are respectively connected to an end of each of
electric source wires 8 passed through the hole 6. Second one of
the said four parts if a mounting member 14 including a flange part
12 and a cylindrical part 13. The flange part 12 is provided at its
upper surface end edges along the center line with engaging parts 9
for engaging in the slit of distributing duct and with an engaging
hole 11 at the center having a groove 10 for receiving the boss 4
of the tube 1. The cylindrical part 13 is integrally formed under
the engaging hole 11 with the flange part 12, and is adapted to
receive therein a pushup spring 15 so as to have the mounting
member 14 normally resiliently biased in upward direction when the
member 14 and spring 15 are mounted around the tube 1. Third one of
the four parts is an operating member 19 having at upper and lower
ends cylindrical locking projections 16 and 17, respectively, and
around inner peripheral surface a thread 18, with which the
operating member 19 will be engaged with the threaded part 5 of the
tube 1. The pushup spring 15 will be pushed upwardly at its lower
end by upper end surface of the upper locking projection 16 so that
the mounting member 14 will be resiliently urged in upward
direction. The last one of the aforementioned four parts of the
plug P is a fixing member 22 having a lock cylinder 20 for locking
the lower projection 17 of operating member 19 mounted around lower
tube part of the tube 1 as engaged with the threaded part 5, and a
thread 21 around inner periphery thereof. At its lower part, the
fixing member 22 is provided with a screw hole 23, into which a
screw 24 will be screwed so as to fix the member 22 to the tube
1.
Referring now to FIG. 1, H is a distributing duct, which is shown
here fragmentarily with an end vertically sectioned. The duct H
comprises generally an insulator member 28 of a reverse U-shape
opened at lower surface as a long continuous opening 25 and
containing a pair of conductor members 27, and a channel-shaped
housing 33 receiving therein the insulator 28 and likely opened at
its lower surface as a long continuous slit 31 restricted at both
sides by edges 32. The conductors 27 made, for example, from a
copper strip, respectively, are arranged inside both sidewalls 26
of the insulator 28 so as to oppose in vertical relation to each
other through a distance adapted to be resiliently engaged by each
of the contactors 7 of the distributing plug P, and are rigidly
held by the insulator 28 at their upper and lower ends as immersed
into the insulator body. The insulator 28 is in turn fixedly held
in the housing 33 as locked by locking projections 29 and 30
respectively provided on upper and lower inner surfaces of the
housing 33 at each corner of the insulator 28, in such manner that
the opening 25 of the insulator 28 and the slit 31 of the housing
33 are aligned with each other.
In mounting the distributing plug P to the duct H, the protuberant
part 3 of the plug is first inserted into the slit 31 in such way
that the engaging parts 9 on the flange 12 will be right angle with
respect to longitudinal direction of the slit 31. Then, at a
position where the flange 12 is butted against the edges 32 of
housing 33 and the protuberance 3 is, on the other hand, passed
into the housing beyond the edges 32 against upward resiliency of
the mounting member 14, the plug P is turned around by 90.degree.
so that the protuberant part 3 will be also turned by 90.degree.
inside the housing. At the turned around position, the projections
2 of protuberant part 3 will be bridged across the housing edges 32
and, at the same time, the contacting members 7 at forward ends of
the projections 2 are resiliently brought into contact with the
conductors 27 of the duct H in the vertical relation to each other,
respectively. At the same time, the engaging parts 9 of the flange
12 will engage into the slit 31, thereby the plug P is prevented
from being axially rotated. In this position, the mounting member
14 will be resiliently pressed at its upper surface of the flange
12 against lower surface of the housing 33 automatically by means
of upward resiliency of the pushup spring 15 so that the slit edges
32 will be resiliently held between the projections 2 of the
protuberant portion 3 and the flange 12 of the mounting member 14,
as shown in FIG. 3.
Under the above mentioned condition, an electric source current
will be supplied from the duct H to the electric source wires 8
passed through the electricity collecting tube 1 of the
distributing plug P, through the contacting areas between the
conductors 27 and the contactors 7 established by means of the
spring action of the latter, so that such a load (not shown) as a
lighting equipment or the like mounted to lower end of the plug and
connected to the other end of the wires 8 will receive the
power.
In such conducting state as above, since the plug P is resiliently
mounted to the duct H with its mounting member 14 butted against
lower surface of the duct only by the upward spring action of the
pushup spring 15, the plug P can be freely slided along the slit 31
against the resiliency of the spring 15 to any desired position on
the duct H. In order to fix the plug at the desired position, the
operating member 19 may be simply turned so as to be moved along
the tube 1 upwardly, until the mounting member 14 will be rigidly
pressed to the lower surface of the duct H.
Turning next to FIGS. 5 through 8, there is shown another
embodiment of the present invention. That is, the contacting
members 7 of the distributing plug P may be made in such structure
that each contacting piece 34 bent in a U-shape so as to be
provided with an arcuate part a will have a longer extended leg
than a free end 35 at the side for fixing the contacting member,
and the extended leg will be provided with an integral base piece
36 further extending downwardly at a right angle with respect to
the extended leg and connected to an end of the source wires 8. In
the present instance, the protuberant part 3 is formed to have a
groove 37 of substantially a reverse Z-shape connected with the
central through hole 6 for passing the electric source wires and
directly with the downward extending collecting tube 1, and small
grooves 38. Each of the free ends 35 of the contacting members will
be fitted in the small grooves 38, respectively, and the other
extended legs are fitted into extended parts of the reverse
Z-shaped groove 38, respectively, with the base pieces 36 and the
wires 8 connected thereto inserted into the through hole 6, so that
the arcuate portions a are extended out of forward end peripheries
of the protuberance 3, respectively. A separator 41 of a molded
synthetic resin or the like having a wedge member 39 and a cap
integrally formed above the member 39 will be fitted on the
protuberance 3 in such manner that the wedge member 39 will be
inserted into the hole 6 and between the respective base pieces 36
so as to urge the pieces against opposed inner periphery of the
hole 6 and to, thus, fix the contacting members 7 in the hole as
separated from each other and, at the same time, the cap 40 will
cover and insulate the upper surface, as shown in FIG. 5, except
the arcuate parts a of the contacting members 7. With this
arrangement, a distributing plug P having the contacting members
adapted to perform the spring action in horizontal direction at
their arcuate portions exposed out of the lateral forward ends of
the protuberant part 3 with an end remained in free state will be
formed.
As shown in FIG. 7, the contacting members 7 will remain in free
extended state, before they are brought into contact with the
conductors 27 of the duct H. When the plug P is mounted to the duct
and rotated 90.degree. so that the members 7 engage the conductors
27, the arcuate portions a of the members 7 will be depressed by
the conductors and the free ends 35 of the members 7 will be moved
along the small groove 38 against their own resiliency. Thus, the
arcuate portions a of the contact members 7 will be deformed as
shown in FIG. 8 and will closely engage the conductors in vertical
relation thereto with the horizontally directioned spring action of
the members 7 now being actuated. Thus, it is made possible to have
the plug slided along the duct while keeping the conducting state
between the contacting members and the conductors.
In a further embodiment of the present invention, shown in FIGS. 9
and 10, the plug P is formed in a modified structure specifically
with respect to the contacting members and, optionally, the
mounting means. As will be seen best in FIG. 10, the upper end
protuberant part 3 of the collecting tube 1 made likely of a molded
synthetic resin or the like is formed to have a longitudinal recess
42 connected to the through hole 6 at the center and opened at both
forward ends. Each of the contacting members 7 is formed from a
continuous plate material to have a spherical free end 44, an
inclined leg 46 subsequent to bent part 45 of laterally extending
part 48, and base portion 47 below the leg 46. The base portion 47
will be connected to an end of the wires 8. Two of the contacting
members 7 thus formed will be fitted in the recess 42 and the hole
6 so as to longitudinally symmetrically oppose to each other, with
the lateral extensions 48 laid in the recess 42 so as to have the
spherical ends 44 extended out of the forward ends of the
protuberant part 3, and with the legs 46 and base portions 47, as
well as the wires 8 connected to the latter, inserted in the hole
6. A separator 52 likely of a synthetic resin or the like having a
wedge portion 50 with inclined surfaces 49 at its upper both sides
and a cap 51 will be fitted on the top of the protuberant part 3 so
as to insert its wedge portion 50 into the hole 6. The wedge
portion 50 will urge each of the base portions 47 of the contacting
members 7 against each of opposing inner peripheral walls of the
through hole 6 so as to fix them in the position, and the cap 51
will cover and insulate the lateral extensions 48 of the members 7
laid in the recess 42 at the top of protuberant part 3, while the
spherical free ends 44 are respectively urged to extend out of each
of the opened forward ends of the recess 42 in the horizontal
direction.
With the above arrangement of the third embodiment, the plug P will
be also provided with the contacting members 7 having the spring
action at the spherical free ends in the horizontal direction, at
which ends the members 7 are to be resiliently engaged by the
distributing conductors.
In the present embodiment, further, the mounting mechanism of the
plug to the distribution duct has the following structure.
While the pushup spring 15 is similarly set around upper part of
the collecting tube 1 and covered by the mounting member 14, lower
end of the spring 15 is made to be supported, in the present
instance, by upper end of upwardly extended cylinder part of the
fixing member 22. Around outer periphery of said extended cylinder
part is formed a screw thread 43, to which the operating member 19
having also a screw thread around its inner wall (but without the
upper and lower locking projections 16 and 17 in this case) is
fitted, so that the member 19 will be movable upward and downward
when rotated along the threaded upward extension of the fixing
member 22. The member 22 is fixed at a proper position around the
lower portion of the collecting tube 1 (in this case the tube 1 has
no threaded part) by means of the screw 24 so as to leave a
sufficient space between lower end of the mounting member 14 and
upper end of raised portion of the fixing member 22 for the
movement of the operating member 19. Thus, while the mounting
member 14 is movable downwardly against the upward biasing force of
spring 15 upon receiving any downward force when the member 19 is
kept at its lower position, the member 14 will be locked at its
upwardly biased position by the operating member 19 when the latter
is positioned at the uppermost position where the same engages the
lower end of the member 14.
Leaving the operating member 19 at its lower position, when the
protuberant part 3 of the plug P will now be inserted into the duct
H from the slit 31 at lower surface of the duct and rotated
therein, then the spherical free ends 44 of the contacting members
7 initiate to contact with the conductor members 27 in the duct H
with their own resiliency in horizontal direction increased as
rotated. AT the position where the plug P is rotated by 90.degree.,
the lateral extensions 48 of the contactors 7 are retracted into
their innermost position with the inclined legs 46 urged into
spaces formed by inclined surfaces 49 of the separator 52, so that
the contacting pressure of the contactors 7 against the conductors
27 will be most increased and, at the same time, the spherical ends
44 will closely engage the conductors in the vertical relation
thereto. Thus, it is possible to slidingly move the plug P along
the duct H while the conducting state between the plug and the duct
is kept with the strongest contacting pressure.
According to the present invention, therefore, the distributing
plug is so formed as to be provided with the contacting members
which has a horizontally directed spring action at both ends of the
protuberant part formed at the top of power collecting tube, the
mounting member fitted movably on the tube beneath the protuberant
part thereof is arranged so as to be always spring biased in the
upward direction toward the side of the duct, and the duct is
provided with the conductor members as opposed to each other in
vertical relation to the slit at the lower side of the duct. With
these features of the structure, the plug is capable of being
stably mounted to the duct as resiliently held thereto in an
automatic manner by means of the upward spring biasing force always
presented to the mounting member of the plug when the contacting
portion at the top of the plug is inserted, while being kept in
aligned angle with the slit of the duct, into the duct and rotated
by 90.degree.. At the same time, the contacting members of the plug
are brought into firm contact with the respective conductor members
of the duct in the vertical relation thereto with the horizontally
directional spring biasing force automatically increased as the
plug is rotated, so that the increased contacting pressure between
the conductor and contactor members will be always kept at a
sufficient amount for the conduction. With the above advantages
established according to the present invention, the distributing
plug is featured in that its position on the duct can be freely
changed as desired by freely moving the plug along the duct while
desired conducting state of electricity from the duct to the plug
is sufficiently maintained.
While the present invention has been described specifically with
reference to the illustrated embodiment, the invention is not to be
intentionally limited to the specific structures as shown and
disclosed. For example, the conductor members may be made in the
form of wire, in the case where the contacting members take the
form as shown in FIG. 10.
* * * * *