U.S. patent number 3,809,416 [Application Number 05/218,439] was granted by the patent office on 1974-05-07 for door lock mechanism.
This patent grant is currently assigned to Aisin Seiki Company Limited. Invention is credited to Kenichi Kazoaka.
United States Patent |
3,809,416 |
Kazoaka |
May 7, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
DOOR LOCK MECHANISM
Abstract
A door lock mechanism, characterized by that a rotatable disk
latch having a plurality of recesses each adapted for engagement
with a striker when a door fitted with the door lock mechanism less
the striker is provided, and a rotatable pawl is provided in close
proximity, said pawl being adapted for mechanical cooperation with
said recesses or notches successively.
Inventors: |
Kazoaka; Kenichi (Kariya,
JA) |
Assignee: |
Aisin Seiki Company Limited
(Kariya-shi, JA)
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Family
ID: |
27276547 |
Appl.
No.: |
05/218,439 |
Filed: |
January 17, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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4370 |
Jan 20, 1970 |
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Current U.S.
Class: |
292/216 |
Current CPC
Class: |
E05B
85/243 (20130101); E05B 77/18 (20130101); Y10T
292/1047 (20150401) |
Current International
Class: |
E05B
65/32 (20060101); E05B 65/20 (20060101); E05c
003/26 () |
Field of
Search: |
;292/198,216,280,DIG.26,DIG.27 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Moore; Richard E.
Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn &
Macpeak
Parent Case Text
This application is a continuation of application Ser. No. 4,370
filed Jan. 20, 1970 and now abandoned.
Claims
The embodiments of the invention in which an exclusive property
or
1. In a door lock mechanism for an automotive vehicle comprising a
wheeled chassis and at least a door pivotably attached thereto,
said mechanism comprising in combination,
a striker fixedly attached to said chassis;
a base plate fixedly attached to said door;
a recessed body fixedly attached to said door;
a disc latch rotatably mounted within said recess for movement
between a latching and a latch-releasing position;
stop means adapted for engagement with said disc latch to stop it
in predetermined positions;
notch means formed on the outer periphery of said disc latch and
having a shape for engagingly receiving said striker to move said
disc latch to the latching position by closure of said door, said
notch means being adapted for engagingly receiving said stop means
so as to maintain said disc latch in the latching position and a
partially latching position;
latch release operator means pivotably mounted on said base plate
for movement between an inoperative position and an operative
position;
an intermediate member adapted to be actuated by said operator
means for movement between positions wherein said operator means
and said stop means are in coupled and uncoupled relation, and
a locking lever pivotably mounted on said base plate for movement
between locked and unlocked positions and adapted to move said
intermediate member to its coupling or uncoupling positions;
the improvement wherein a further notch means is formed in the
outer periphery of said disc latch and serves to maintain said stop
means at a certain definite position when the door is opened, and
comprising;
disengagable means for actuating said intermediate member to bring
said locking lever into its unlocking position when said stop means
is disengaged from said further notch means by rotation of said
disc latch to its latching position;
said locking lever being moved to its unlocking position under the
action of said disengageable means when said disc latch is rotated
in a latching direction with said locking lever in its locked
position and said operator means in its inoperative position,
and
said intermediate member being actuated to effect an idle motion of
said disengageable means in response to rotation of said disc latch
in its latching direction with said locking lever in its locked
position and with said operator means in its operative
position;
said first mentioned notch means and said further notch means
comprising a first notch adapted for engagingly receiving said
striker to rotate said disc latch to its latching position, a
second notch engageable with said stop means for maintaining said
disc latch in an unlatching position, and a third notch engageable
with said stop means for maintaining said disc latch in a partially
latching position, and
a fourth notch engageable with said stop means when said disc latch
is in
2. The door lock mechanism as claimed in claim 1, wherein said
fourth notch
3. The door lock mechanism as claimed in claim 1 wherein a shaft is
rotatably mounted on said body, and said disengageable means and
stop means are fixedly attached to said shaft.
Description
This invention relates to improvements in door lock mechanisms,
especially those for use in automotive vehicles.
With the recent tendency of accelerated speed-up of the automotive
vehicle speed, it is highly desirous to prevent a sudden and
unintentional opening of the vehicle door on an emergency stop of
the running automotive at a high speed, so as to prevent the riding
person or persons from being thrown out of the vehicle through the
flown open door. As a counter and safety measure against such kinds
of accidents, it has already been proposed to substantially
intensify the structure of the door lock mechanism, especially for
increasing the breaking strength of the mechanism. In this respect,
the disk latch member has been employed and arranged to be
rotatable in a circular recess formed on a mounting member made
integral with the base element of the door lock, a U- or similar
shaped striker being used for cooperation with the disk latch. In
this way, substantial success has been attained in the increase of
the breaking strength of the latch per se, as well as the mounting
member thereof.
It is an object of the present invention to provide a door lock
mechanism, capable of performing an effective non-opening function
for the door which has been once closed, even in the unlocked
position of the door lock.
A further object is to provide a door lock mechanism of the above
kind, allowing the automotive door to be opened only intentionally
and inside as well as outside of the automotive vehicle.
A still other object of the invention to provide the door lock
mechanism of the above kind, capable of performing an effective
door lock function from inside as well as outside of the automotive
vehicle, so as to allow the door opening only by the hands of an
authorized person.
A further object of the invention is to provide a door lock
mechanism of the above kind, capable of performing an effective
unlocking function which means an automatic release of the locked
position of the mechanism caused by an unintentional or erroneous
locking operation from inside of the vehicle and upon performing of
a door closure operation.
It is a still further object of the invention to provide a door
lock mechanism, capable of performing a keyless lock operation.
These and further objects, features and advantages of the invention
will become more apparent when read the following detailed
description of a preferred embodiment of the invention by reference
to the accompanying drawings illustrative of a preferred embodiment
of the invention.
In the drawings:
FIG. 1 is a front view of a preferred embodiment of the door lock
mechanism provided with a disk type clutch means.
FIG. 2 is a left-hand side view of the mechanism shown in FIG.
1.
FIG. 3 is a right-hand side view of the same mechanism.
FIG. 4 is a sectional view taken along a section line IV--IV shown
in FIG. 2.
FIG. 5 is a sectional view taken along a section line V--V shown in
FIG. 4.
FIG. 6 is a back side view of the same door lock mechanism and a
conventional striker when the former is kept in its unlatched
position, thus the door is kept opened although not shown.
FIG. 7 is a similar view to FIG. 6 when the door lock mechanism is
kept in its locked position.
In these drawings, same references represent respective same
constituent parts throughout all the figrues of the drawings.
Referring now to the accompanying drawings, especially FIG. 1
thereof, the numeral 1 represents a base plate of an automotive
door lock mechanism embodying the principles according to this
invention, and an open lever 2 substantially shaped into a tee is
pivotably mounted at an intermediate point thereof around a pin 3
which is fixedly attached to said base by conventional fixing means
such as by riveting as shown at 3a in FIG. 2.
Open lever 2 comprises a first arm 2a, a second arm 2b and a third
arm 2c, and a substantially hook-shaped mechanical connector 5 is
pivotably mounted at its one end by means of a pivot pin 4 on the
first arm 2a, while the opposite or hooked-end 5a is kept in a link
engagement with a pivot pin 10.
The free end of second arm 2b protrudes loosely through a guide
opening 1b bored through a side flange 1a folded towards the viewer
from the right-hand side edge of the main body 1 when viewed in
FIG. 1, as more clearly be seen in FIG. 3. As will be more fully
described hereinafter, said guide opening 1b serves for limiting
the range of pivotal movement of the open lever 2 through the
engagement of the second arm 2b with the guide opening as above
referred to. Although only schematically shown by a small arrow
"A", the third arm 2c is mechanically connected by a connecting
link not shown, with a conventional outside door handle fitted on
the automotive door. A vehicle driver or the like authorized person
can manipulate the keying mechanism by means of his manual key in
the door-opening direction at the will of the person, and then
motion will be transmitted through said connecting link to the
third arm 2c to the open lever 2 which is then turned counter
clockwise, as will be later referred to in a more specific way.
Therefore, the third lever 2c can be defined as "lock release lever
member."
A tension spring 13 is tensioned between a spring mount 2d formed
into a small projection made integral with the third lever arm 2c,
and a spring-receiving opening 1e formed through said side flange
1a, thus the open lever 2 being resiliently urged to rotate in the
clockwise direction in FIG. 1 around said pivot pin 3.
A locking plate 6 is pivotably mounted on a lower part of the base
plate 1 when seen in FIG. 1 and at an intermediate point by means
of a pin 8, to which an open plate 7 is fixedly attached at a
slightly higher level than the locking plate relative to the plane
of the drawing concerning with FIG. 1. One end 6a of the locking
plate 6 projects through an open recess 1c formed on the side
flange 1a, thus said recess serving as a limiter for the pivotal
movement of said locking plate around the pin 8.
In close proximity to the said end 6a, the locking plate 6 is
formed with a opening 6b for link connection of the plate through a
connecting link, not shown, to an inside locking member, such as a
conventional inside push knob, not shown, adapted for keeping the
door lock mechanism in its locked position by manipulating the
knob. In the similar way, a second opening 6c is formed through the
locking plate 6 in close proximity to the opposite end thereof, for
link connection of the plate 6 through a connecting link, not
shown, to an operating member, again not shown, for being
controlled by a manual key. An arm 6d extends substantially upwards
in FIG. 1, from the plate 6 at an intermediate point between said
second opening 6c and the pin 8, said pin 10 is fixedly mounted on
this arm 6d.
A further arm 6e extends from the plate 6 upwardly and rightwardly
in FIG. 1, at an intermediate point between said opening 6b and the
pin 8. A turnover spring 14 is tensioned between an opening 6f
bored through said arm 6e and a further opening 1f drilled through
the base plate 1. As already hinted, the pin 10 is kept in
engagement with the groove formed at the hooked end 5a of the
connecting member 5.
A tension spring 9 is tensioned between an opening 7a drilled
through the open plate 7 and a spring-receiving projection 1d
formed on the base plate 1 at its left-hand edge, for resiliently
urging the open plate to turn in the clockwise direction about the
pin 8 when seen in FIG. 1.
A stop member 1g is formed on the base plate 1 by bending a part
thereof up from the plate and a first arm 7b of said open plate 7
is kept normally in pressure engagement with the stop 1g under the
action of tension spring 9, thereby the extremity of clockwise
turning movement of the open plate being defined.
With counter clockwise rotation of open lever 2 from the position
shown in FIG. 1, thereby connection member 5 being shifted
downwards, motion is transmitted therefrom to second arm 7c of said
open plate 7 which is therefore turned counter clockwise in FIG. 1
about the pin 8. Third arm 7d of the open plate 7 extends
substantially from its center as shown and the extreme outer end
100 of said third arm 7d is bent up from the plane of FIG. 1
towards the viewer so as to engage with the hooked portion 5a of
connecting member 5 when the open plate 7 is turned clockwise from
the position shown in FIG. 1. This engageable design can be easily
seen more clearly by reference to FIG. 2.
As most clearly seen from FIG. 2, inside open lever 11 shaped into
a bell crank lever is pivotably mount4d on a substantially
triangular projection 101 made integral with said side flange 1a,
by means of a pivot pin 12. The lever 11 is formed with a
connection opening 102 which is linkedly connected through a link
member, not shown, with a conventional inside door handle, although
not shown. A lever arm 11a of said lever 11 has enough length to
engage with the second arm 2b of open lever 2. Such engaging
position is clearly seen from FIG. 2.
The pin 8 passes loosely through the base plate, and is attached
rigidly with a stop means or pawl 15 rotatably received in a first
recess 17a which is formed on a mounting member 17 made preferably
of a rigid plastic material such as polycarbonate resin. The
mounting member 17 is held firmly in position on the base plate 1
by a rigid cover member 16 which is rigidly attached in turn to the
base plate by any conventional fixing means such as by riveting as
most clearly seen from FIG. 5. One end 8a of the pin 8 is rotatably
received in a bearing hole 104 bored through the cover member 16.
Thus, pin 8 and pawl 15 are rotatable in unison with each
other.
As most clearly be seen from FIGS. 4 and 5, a substantially
disk-shaped latch member 18 s rotatably received in a second or
circular recess 17b formed on the mounting member 17.
A third or arc-shaped recess 17c is formed in the body of said
mounting member 17, said recess 17c being kept in communication
with said second recess 17b as most clearly seen from FIG. 5 and
receiving a coil spring 20. This spring 20 abuts with its one end
against the end wall of said arc-shaped recess 17c and with its
other end against a stop pin 19 fixedly attached to the latch
member 18, thus the latter being urged resiliently to turn in the
counter clockwise direction when seen in FIG. 4. The latch 18 is
formed with first, second and a third notches 1a, 18b and 18c,
respectively. As will become more clear as the description
proceeds, the first notch 18a is adapted for receiving a
conventional striker 21 which is attached rigidly to an automotive
door, not shown, while the second and third notches 18b and 18c are
designed and arranged to be engageable with the acting part 15a of
said pawl 15. The range of counter clockwise turing motion of the
latch 18 when seem in FIG. 4 is limited to a position where the
said pawl 15 is brought into engagement with the third notch 18c.
Cover member 16 and mounting member 17 are formed with a recess 16a
and an opening 17d, respectively, adapted for receiving the striker
21 when the latter is relatively incoming during coosure of the
automotive vehicle door, not shown.
For fixedly attaching the striker 21 to a pillar of the vehicle
chassis, not shown, it is formed with a pair of openings 105 and
106 for receiving conventional fixing means such as fixing bolts or
similar members.
In the practical use of the door lock mechanism so far shown and
described, it is attached fixedly to the vehicle door, although not
specifically shown, by means of fixing male screw means, adapted
for being received respectively in a plurality of, herein three,
conventional screw receiving means 107-110 having corresponding
female screw threads adapted for cooperating with said male screw
means.
The operation of the aforementioned door lock mechanism is as
follows.
When the door is kept in its opened position, the disk latch 18 and
the pawl 15 occupy their relative position as shown in FIG. 6.
When the door is being closed, the striker 21 will advance towards
the first notch 18a of latch 18. In this course of the movement of
the striker, it engages at first with the feeding tooth or
projection 18e of latch 18, so as to turn the latter in the counter
clockwise direction in FIG. 6, thereby the pawl 15 being turned in
the clockwise direction against the action of spring 9. By this
relative movement, pawl 15 is shifted frm engagement with third
notch 18c to the engaging position with second notch 18b, thence
with the feeding tooth 18e of first notch 18a as shown in FIG. 4.
The position of the engagement of the pawl with the second notch is
called "the safety latch" position for the door. On the other hand,
the position of the engagement of the pawl with the first notch
18a, or more specifically the feeding tooth 18e, is called "the
perfect latch position" by those skilled in the art.
When the driver manipulates the outside open handle, not shown, in
the door-opening direciton from the door-closed position, wherein
all the working parts of the door lock mechanism are kept in the
position shown in FIGS. 1, 2, 3 and 5, motion will be transmitted
from the handle to lever arm 2c, thereby the latter beng pivotably
moved leftwards in FIG. 1, so as to turn the open lever 2 in the
counter clockwise direction about the pin 3 so that the connecting
member 5 is lowered in FIG. 1 while being kept in sliding contact
with pin 10 and the second arm 7c of open plate 7 is urged to shift
in a lowered position upon pressure contact with the lowermost
extremity of said member 5. Therefore, open plate 7 is rotated
together with pin 8 in the counter clockwise direction in FIG. 1,
thereby the pawl 15 being rotated in the counter clockwise
direction in FIG. 4. In this way, the engagement of the acting part
15a of pawl 15 with the disk latch 18 is released and the latter is
urged by the spring action 20 to turn in the counter clockwise
direction in FIG. 4, until the entrance part of first notch 18a,
the recess 16a of cover plate 16 and the recess 17d of mounting
member 17 are brought substantially into registration with each
other, as shown in FIG. 6, wherein the striker 21 is brought into
separation from disk latch 18 so that the door becomes ready for
opening.
On the other hand, when the conventional inside door open handle is
manipulated in the door-opening direction when all the working
parts of the door lock mechanism are kept in their door-closed
position, motion will be transmitted from the handle to the arm 11b
of inside open lever 11, so as to rotate the latter in the
clockwise direction about the pin 12 in FIG. 2, thereby the second
arm 2b of open lever 2 being urged by the opposite arm 11a to move
upwards in FIGS. 1 and 2, so as to rotate the lever 2 about the pin
3 in the counter clockwise direction. Further operation steps will
thus be similar as before, until the door is brought into its ready
opening position.
When the authorized person manipulate his manual key, not shown,
from outside of the door as conventionally to lock the door for the
prevention of unauthorized door opening and for the manipulation of
the conventional keying mechanism, again not shown, motion will be
transmitted therefrom through a connecting link, not shown,
connected linkedly with the left-hand opening 6c, to locking plate
6, so as to turn the latter about the pin 8 in the clockwise
direction in FIG. 1. Similar turning effort is given to the locking
plate 6 when the person exerts his finger pressure upon the
conventional inside locking push knob so as to push down it, since
motion will be transmitted therefrom through the connection link,
not shown, to the plate 6 for turning the latter about the pin 8 in
the clockwise direction in FIG. 1.
In each case, therefore, the pin 10 will perform a circular
movement around the pin 8 in the clockwise direction in FIG. 1,
thereby the lower or hooked end of connection member 5 being
shifted towards right. It w1ll thus seen that the working parts of
the door lock mechanism are brought in this case into their door
lock position, as shown in FIG. 7. In this position, the turnover
spring 14 has been brought into its another working position so
that it exerts a resilient force upon the locking plate 6 to move
in the counter clockwise direction in FIG. 7.
When the person manipulates the outside or inside open handle, as
the case may be and under the operating conditions shown in FIG. 7,
so as to turn the open lever 2 in the counter clockwise direction
from its full line position to its chain line one shown in the
drawing, the lowermost end of connection member 5 is not in a
position adapted for cooperation with the second arm 7c of open
plate 7. Door-opening effort even exerted in this case, therefore,
does not provide any influence upon the plate 7 which is therefore
unchanged in its position so that the door can not be opened in
spite of the door-opening effort. Thus, the door is kept in its
locked position.
Now assuming that the person touches the inside locking push knob
unintentionally in some or other way from inside of the vehicle so
that the knob has been brought into its locking position and the
locking plate 6 has been shifted to its position shown in FIG. 7
and that the person manipulate the door in its closing direction,
striker 21 and latch 18 are brought into the cooperating position
by the closing movement of the door and the latch will be turned as
before. In this case, pawl 15 is shifted from engagement with the
third notch 18c of latch 18 to the position for pressure engagement
with a third tooth 18f formed at an intermediate position between
the notches 18b and 18c so that the safety latch position may be
brought about, and then when pawl 15 is engaged with a fourth tooth
18e formed between the notches 18a and 18b the full latch position
will be realized. During this course and when the pawl 15 is
disengaged from third notch 1c and brought into engagement with
third tooth 18f, the pawl is turned in the counter clockwise
direction in FIG. 4, and accoringly, the open plate 7 is rotated in
the counter clockwise direction in FIG. 7.
By this rotation, the third arm 7d of open plate 7 is brought into
pressure contact with the hooked part 5a of connection member 5 so
that the latter will be swivelled in the clockwise direction in
FIG. 7. By this swivelling motion of the member 5, the pin 10 is
urged to move leftwards in the drawing, the locking plate 6 being
turned thereby in the counter clockwise direction about the axis of
pin 8. In this way, the plate 6 is shifted from the position shown
in FIG. 6 back to the position shown in FIG. 1. This new position
is kept unchanged under the action of turnover spring 14.
After this operation, the door can be brought into its
ready-opening position, by manipulating the outside door handle in
its opening direction for turning the open lever 2 clockwise about
the pin 3 in FIG. 1. Therefore, it will be seen that a kind of the
unlocking mechanism has been provided.
For performing the keyless operation so called among those skilled
in the art, the person can manipulate the inside locking push knob
in such a way that locking plate 6 and connection member 5 are
brought into their locking position and then he may manipulate the
outside open handle in its door-opening direction and finaly the
door is closed.
In this case, open lever 2 and connection member 5 are positioned
in the chain line position shown in FIG. 7. During the counter
clockwise rotation of open plate 7 while closing the door, the
third arm 7d of open plate 7 can not engage with the hooked part 5a
of connection member 5 and thus the latter is kept in the position
shown in FIG. 7. It will be clear from the foregoing that a
door-closing operation can be realized without any use of the
conventional door key.
A substantial advantage attainable by use of the disk latch resides
in such a feature that the notch means adapted for engagement with
the striker can be so designed and arranged that such means occupy
a substantially nearer position to the rotational center of the
latch, in spite of the no provision of a rotational center shaft or
pin to the latch. If there is an outside force urging the latch to
bring it in its disengaging position therefrom, or more
specifically, even when a door-opening external and unintentional
force is applied, the couple of force induced in the latch is made
to be only a minor value and therefore no destructive external
force can not be applied to the pawl. In addition, the disk latch
is received by its substantially whole peripheral surface so that
the possible destructive force capable of being applied to the
latch or the mounting member provided therefor may be reduced to a
possible minimum in comparison with a substantial large value as
met with the conventional fork type or ratched wheel type which
means a substantial progress in the art. Further, in case of the
striker kept in its engaging position with the disk latch, the
striker is kept in a kind of embraced situation by means of the
disengagement prevention tooth 18a for the striker, having a broad
and elongated working surface highly effective for the desired
purpose and therefore, an outside force occationally acting to a
substantial degree in the longitudinal direction of the vehicle
chassis and for unintentional separation of the latch disengagement
must necessarily encounter a large resistance thereagainst and thus
a sudden and unintentional opening of the latched door could not be
feared.
It is noted that the pawl 15 is situated in the same position when
the door is opened or closed, as shown in FIGS. 4 and 6, and hence
the open plate 7 is not moved to be brought into contact with the
hooked portion 5a of connection member 5 even in a semi-opened
condition of the door, capable of easily bringing the preparatory
state of the unlocking and the key-less locking operations. In
other words, if the third notch 18c is not formed in the periphery
of latch 18 it is very difficult to execute the unlocking-and the
key-less operations because of the further leftward displacement of
the open plate 7 from its position shown in FIG. 7.
It is further noted that the first notch serves for locking the
door by the engagement of the pawl 15 with the first notch and for
receiving engageably the striker, while the conventional latch
member is provided with separate notches for receiving the striker
and for locking the door therewith. Therefore, the inventive latch
has larger peripheral surface than that of the conventional one,
and hence the force acting in the door-opening direction is
advantageously received in the parent inventive mechanism.
According to the novel teaching of the invention, the disk latch
having a substantial advantage of providing a considerable degree
of strength against the latch destruction as would be met in an
emergency is formed with notch means adapted for receiving a pawl
means in case of the unlatched condition of the door mechanism and
thanks to this main constructional feature, various necessary
functions of the door lock mechanism, such as the keeping the door
in its closed position in case of closure of the door; the
prevention of unintentional door opening or closing from inside or
outside of the vehicle; the locking or unlocking operation from
inside or outside of the vehicle; and the so-called keyless lock
function can be realized in an effective way and with a highly
simplified construction of the door lock mechanism.
* * * * *