U.S. patent number 3,836,985 [Application Number 05/364,856] was granted by the patent office on 1974-09-17 for miniature camera with front wall cover.
This patent grant is currently assigned to Balda-Werke Photographische Gerate Und Kunststoff GmbH & Co. KG. Invention is credited to Karl-Heinz Lange.
United States Patent |
3,836,985 |
Lange |
September 17, 1974 |
MINIATURE CAMERA WITH FRONT WALL COVER
Abstract
A miniature camera having a generally rectangular front wall
provided with longated top and bottom edges and opposed end edges
which are substantially shorter than the top and bottom edges. At
least one cover plate is pivotally connected to the housing of the
camera for swinging movement about an axis parallel to the top and
bottom edges of the front wall between a closed position covering
at least part of the front wall and an open position uncovering the
latter part of the front wall. This part of the front wall is
provided with openings through which light can reach an objective
and a viewfinder, so that when the cover plate is in its closed
position these openings are covered to protect the objective and
viewfinder against dust, foreign matter, and the like.
Inventors: |
Lange; Karl-Heinz (Bunde,
DT) |
Assignee: |
Balda-Werke Photographische Gerate
Und Kunststoff GmbH & Co. KG (Bunde, DT)
|
Family
ID: |
5846581 |
Appl.
No.: |
05/364,856 |
Filed: |
May 29, 1973 |
Foreign Application Priority Data
Current U.S.
Class: |
396/448; 359/612;
396/502; 396/534; 396/535 |
Current CPC
Class: |
G03B
29/00 (20130101); G03B 3/02 (20130101) |
Current International
Class: |
G03B
3/02 (20060101); G03B 29/00 (20060101); G03B
3/00 (20060101); G03b 011/04 (); G03b 019/00 () |
Field of
Search: |
;95/11R ;352/242
;350/58,59,60 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,105,407 |
|
Mar 1968 |
|
GB |
|
681,557 |
|
Mar 1964 |
|
CA |
|
Primary Examiner: Greiner; Robert P.
Attorney, Agent or Firm: Blum Moscovitz Friedman &
Kaplan
Claims
What is claimed is:
1. In a miniature camera, a housing of relatively thin, flat
configuration having a front wall of at least substantially
rectangular, narrow, strip-shaped configuration provided with
opposed relatively long top and bottom edges and opposed relatively
short end edges extending between said top and bottom edges and
having a length substantially less than one-half the length of said
top and bottom edges, said housing having top and bottom walls
extending rearwardly from said top and bottom edges and spaced from
each other by the same distance as said top and bottom edges and
opposed end walls extending rearwardly from said end edges and
spaced from each other by the same distance as said end edges, the
said front wall being formed with openings through which light has
access to an objective and viewfinder situated in said housing
behind said openings, and the latter openings being distributed
longitudinally of said front wall with each opening situated
between the other opening and one of said end edges, and at least
one cover plate situated at all times between a pair of planes
which contain said end walls, said cover plate being pivotally
connected to said housing for swinging movement about an axis
substantially parallel to and situated closely adjacent and
extending along said top edge of said front wall between a closed
position in front of said front wall covering said front wall
openings and an open position uncovering said openings to an extent
sufficient to permit light to reach said opening from a location
situated forwardly of said front wall, a pair of said cover plates
are pivotally connected to said housing for swinging movement about
a pair of axes, respectively, which are substantially parallel to
and located closely adjacent and extending along said top and
bottom edges of said front wall in a manner similar to swingable
visors between a closed position covering said openings of said
front wall and an open position uncovering said openings, said
cover plates having elongated free edges distant from and
substantially parallel to said axes, and said free edges engaging
each other in the closed position of said cover plates so that the
latter do not overlap each other in the closed position
thereof.
2. The combination of claim 1, and wherein said cover plates are
respectively fixed with gear sectors normal to said axes and
meshing with each other for constraining said cover plates to move
equally and oppositely between said closed and open positions.
3. The combination of claim 2 and wherein said gear sectors are
situated at each end of said cover plates.
4. The combination of claim 2 and wherein a means coacts with at
least one of said cover plates for releasably retaining the latter
in its open position.
5. The combination of claim 2 and wherein a manually operable means
is carried by said housing for slidable movement with respect
thereto and is operatively connected with said cover plate for
turning the latter between its open and closed positions.
6. The combination of claim 5 and wherein said manually operable
means has a pin-and-slot connection with said cover plate.
7. The combination of claim 5 and wherein said manually operable
means has an elongated rack portion and said cover plate is fixed
with a toothed sector meshing with said rack portion to be rotated
in response to movement of said manually operable means.
8. The combination of claim 5 and wherein said manually operable
means has a pair of end positions corresponding to the closed and
open positions of said cover plate, and means coacting with said
manually operable means for releasably retaining the latter in at
least one of its end positions.
9. The combination of claim 5 and wherein a shutter-release member
is carried by said housing, said manually operable means having a
blocking position blocking operation of said shutter-release member
when said cover plate is in its closed position and an unblocking
position releasing said shutter-release member for operation when
said manually operable means has displaced said cover plate to its
open position.
10. The combination of claim 1 and wherein said cover plates when
in said closed position engaging each other along a contact line
which is situated forwardly of a plane which contains the pair of
axes about which said cover plates are swingable.
Description
BACKGROUND OF THE INVENTION
The present invention relates to cameras.
The present invention relates in particular to miniature cameras of
the type having an elongated, relatively narrow, horizontally
extending front wall formed with openings through which light can
reach such components as the objective and the viewfinder of the
camera.
Known cameras of this type have freely exposed viewfinders and an
objective which is protected by a shiftable relatively rigid cover
slide. In order to make an exposure it is necessary to shift this
cover slide laterally away from the objective along the front of
the camera housing to a location situated beside the objective.
Such a rigid shiftable slide member cannot, however, cover all of
the components, such as a viewfinder, light meter, and objective,
which are distributed along the narrow front wall of the camera,
since there is insufficient space at the front wall of a camera of
this type to permit such a shiftable member to move laterally
through a distance sufficient to uncover all of the elements
essential to making an exposure. Therefore, with the known cameras
of this type the objective is covered but the viewfinder remains at
all times uncovered. This construction is highly unsatisfactory for
miniature cameras which are commonly placed in the pocket of a
garment without a camera case. There is of course the possibility
of utilizing, instead of a rigid shiftable cover slide, a flexible
slide which is capable of uncovering the front components of the
camera by being shifted around a front edge of the camera parallel
to a side wall thereof. Such a covering arrangement, however, is of
little stability and is easily subject to faulty operation. The
operation of such a construction is very seriously impaired by
becoming clogged with foreign particles which cannot be avoided
when the camera is stored in the pocket of an article of clothing
such as a pair of trousers or a jacket.
SUMMARY OF THE INVENTION
It is accordingly a primary object of the present invention to
avoid the above drawbacks.
Thus, it is an object of the present invention to provide for a
camera of the above general type a strong, reliable covering
structure composed of a relatively small number of elements and
having a closed position capable of covering both a viewfinder and
an objective as well as an open position uncovering these
components.
A further object of the present invention is to provide a covering
structure of the above general type which will serve the added
function of a sun shade, in a manner similar to a visor.
Yet another object of the present invention is to provide a
structure of the above general type which can be readily displaced
between open and closed positions by manipulation of a shiftable
component with the covering structure of the invention being
capable of remaining reliably in a given end position until
displaced therefrom by the operator.
A further object of the present invention is to provide a
construction of the above general type which is capable of
preventing tripping of the shutter to make an exposure when the
front wall is covered.
It is especially an object of the present invention to provide a
construction of the above general type in which the cover will
reliably remain in its open position uncovering such components as
the objective and viewfinder, so that undesired covering of these
components against the will of the operator cannot take place.
Yet a further object of the present invention is to provide a
construction of the above general type which enables the camera to
be readily carried about in the pocket of an article of clothing,
even if the camera is not in a camera case, without any possibility
of undesirable jamming of the movable components which serve to
cover and uncover the front wall of the camera.
Also, the object of the present invention include a structure of
the above general type which does not have the effect of
undesirably increasing the dimensions of the camera when the cover
is in its open position.
According to the invention the camera has a housing provided with a
generally rectangular front wall having top and bottom parallel
edges which are substantially longer than opposed end edges of the
camera front wall. At the front wall of the camera there are
openings through which light has access to an objective and a
viewfinder of the camera. A cover plate is pivotally connected to
the camera for swinging movement about an axis parallel to the top
and bottom edges of the front wall between a closed position
covering these front wall openings and an open position uncovering
these openings.
BRIEF DESCRIPTION OF DRAWINGS
The invention is illustrated by way of example in the accompanying
drawings which form part of this application and in which:
FIG. 1 is a perspective illustration of a camera of the invention
showing the cover structure in its open position;
FIG. 2 is a perspective illustration showing the cover structure of
FIG. 1 in its closed position;
FIG. 3 is a fragmentary partly sectional perspective illustration
showing details of a mechanism for bringing about closing and
opening of the front wall covers;
FIG. 4 is a schematic illustration of the manner in which a pair of
covers are connected to each other as well as showing a further
embodiment of a transmission for swinging of the covers between
their closed and open position;
FIG. 5 is a schematic partly sectional fragmentary illustration of
a further embodiment according to which there is only one cover
plate;
FIG. 6 is a fragmentary side elevation of the camera showing one
type of construction for releasably holding the covers in their
open and closed position; and
FIG. 7 is a fragmentary partly sectional side elevation showing
another embodiment of a structure for releasably holding the covers
in their closed and open positions.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring first to FIGS. 1 and 2, it will be seen that the camera
of the invention has a housing 1 and is in the form of a miniature
camera adapted to be hand-held and having a substantially
rectangular relatively flat or shallow configuration. Thus the
camera shown in FIGS. 1 and 2 is small enough to fit comfortably
into the pocket of a garment. The camera housing 1 has a front wall
2 which is of a generally rectangular configuration, this front
wall 2 having top and bottom edges and opposed end edges which are
considerably shorter than the top and bottom edges, as is readily
apparent from FIGS. 1 and 2. In the example of FIGS. 1 and 2, a
pair of cover plates 3 and 4 are pivotally connected to the housing
1 for respective swinging movement about axes which are
respectively parallel to the bottom and top edges of the front wall
2. These swingable cover plates 3 and 4 are capable of being turned
from a closed position which is shown in FIG. 2, where they cover
front wall openings 5-8 which respectively are capable of
permitting light to have access to an objective, a range finder, a
light meter, and a viewfinder. Thus, when the cover plates 3 and 4
are in the closed position shown in FIG. 2, the openings 5-8
through which light has access to the above components are covered
so that the components themselves or windows at these openings are
protected against becoming fowled by dust or other foreign
matter.
These cover plates 3 and 4 are capable of being swung from the
closed position of FIG. 2 into the open position of FIG. 1. Thus it
will be seen that the cover plates 3 and 4 are in the nature of
visors, and the upper cover plate 4 in particular is capable of
acting as a sun shade when this upper cover plate 4 is in the open
position shown in FIG. 1. In addition, the inner surfaces of the
cover plates 3 and 4 are formed with a longitudinal fluting 9
forming a series of relatively small ribs and grooves which reduce
undesirable effects of light reflection.
In the illustrated example the ends of the cover plates 3 and 4 are
respectively provided with walls 10 and 11 which are normal to the
turning axes of the cover plates and which form gear sectors
meshing with each other, as described below, so that these gear
sectors 10 and 11 at the corresponding ends of the cover plates 3
and 4 compel the latter to swing equally and oppositely to each
other. It will be noted from FIG. 1 that the inner surfaces of the
gear sectors 10 and 11 are also provided with the fluting for
reducing light reflection.
At the upper wall of the housing 1 there is, accessible to the
operator, a shutter-tripping button 12 capable of being depressed
by the operator in order to trip the shutter and make an exposure.
Furthermore, at the left end of the housing 1, as viewed in FIGS. 1
and 2, there is a manually operable means 13 in the form of a plate
capable of being slidably moved longitudinally of the left end wall
of the housing 1 forwardly and rearwardly for the purpose of
displacing the cover plates 3 and 4 between their open and closed
positions shown in FIGS. 1 and 2, in a manner described in greater
detail below.
Referring to FIG. 4, it will be seen that the cover plates 3 and 4
are pivotally connected to the housing 1 for respective swinging
movement about the axes of a pair of pivot pins 15 and 16 which are
respectively fixed to the end walls 10 and 11 and which are
received in suitable bearings in the housing. These pivot pins 15
and 16 fixed to and projecting from the pair of gear portions 10
and 11 at the left end of the plates 3 and 4 are apparent in FIG.
3. FIG. 4, however, clearly shows how the gear sector 10, at each
end of the lower cover plate 3, has teeth 14 which mesh with teeth
14a of the gear sector 11 at each end of the upper cover plate 4.
This coaction between the cover plates through the meshing gear
sectors is not so clearly apparent from FIGS. 1-3. With this
construction either in response to manipulation of the manually
operable means 13 or in response to direct manipulation of one or
the other of the cover plates 3 and 4 by the operator, if desired,
it is possible to swing the cover plates 3 and 4 between their open
and closed positions respectively illustrated in FIGS. 1 and 2.
In the particular embodiment which is shown in FIG. 4, there is
fragmentarily illustrated an extension 21a of the manually
shiftable slide plate 13. This extension 21a which is fixed to the
slide plate 13 for longitudinal shifting movement therewith along
the left end of the camera, as viewed in FIGS. 1 and 2, has at its
lower edge, at the region of its right free end, as viewed in FIG.
4, a series of teeth so that the extension 21a forms a rack. A
further gear sector 21b is fixed to the sector 10 concentrically
therewith in the manner shown in FIG. 4, and the teeth of the
smaller sector 21b mesh with the teeth of the rack 21a, so that
with this construction as the plate 13 is shifted forwardly the
cover plates 3 and 4 will be swung open, while when the plate 13 is
shifted rearwardly the cover plates will be closed.
FIG. 3 illustrates another embodiment of a transmission between the
manually operable means 13 and the gear sectors 10 and 11 at the
left end of the cover plates 3 and 4. Thus, as may be seen from
FIG. 3, the shiftable slide plate 13 which can be manually
displaced by the operator is fixed with a pair of extensions 21 and
22 which respectively terminate in pins 19 and 20 which extend
parallel to the pivot pins 15 and 16, respectively. The gear
sectors 10 and 11 are respectively formed with curved slots 17 and
18 which respectively receive the pins 19 and 20, so that in this
way the extensions 21 and 22 of the slide plate 13 have
pin-and-slot connections with the sectors 10 and 11. As a result
when the plate 13 is shifted forwardly in the direction of the
arrow 24, the gear sectors 10 and 11 and the cover plates 3 and 4
therewith will be swung in the opening direction to displace the
cover plates 3 and 4 from the closed to the open position, while
when the plate 13 is returned to its rear end position the plates 3
and 4 will be returned to their closed position shown in FIG.
2.
It will be noted from FIG. 3 that in addition to the extensions 21
and 22, the manually operable slide plate 13 has an extension 23
which becomes situated beneath the shutter-tripping button 12 when
the plate 13 is in its rear, retracted position, corresponding to
the closed position of the cover plates 3 and 4. As a result when
the cover plates 3 and 4 are in their closed position, the
extension 23 is in a blocking position preventing downward movement
of the button 12 so that the operator cannot trip the shutter at
this time. However, when the plate 13 is shifted forwardly to open
the cover plates 3 and 4, the blocking extension 23 becomes
situated forwardly beyond the button 12 so that now the plate 23 is
in a released position releasing the shutter button 12 for
depression by the operator, and thus at this time it is possible to
make an exposure.
According to the embodiment of the invention which is shown in FIG.
5, there is a single cover plate 27 instead of a pair of cover
plates 3 and 4. This single cover plate 27 is of course wider than
either of the cover plates 3 and 4 so that when the cover plate 27
is in the closed position shown in solid lines in FIG. 5, it will
extend through the distance between the top and bottom edges of the
front wall 2. This plate 27 is pivotally supported by pivots 16 as
shown schematically in FIG. 5, in the same way as the upper cover
plate 4. The single cover plate 27 can be manually swung between
the closed position shown in solid lines and the open position
shown in dot-dash lines in FIG. 5, or any suitable transmission may
be provided such as that of FIG. 4 or that of FIG. 3, enabling the
plate 27 to be swung between its open and closed positions from a
manually operable mean such as the shiftable plate 13.
FIG. 5 shows one embodiment of a means for maintaining a cover
plate in at least one of its end positions. This means in FIG. 5
takes the form of the illustrated over-center spring 25. This
over-center spring 25 has an intermediate coiled portion and a pair
of springy arms projecting therefrom in the manner shown in FIG. 5.
The lower springy arm is supported for swinging movement about a
fixed axis, while the upper springy arm of the spring 25 is
pivotally connected with the plate 27 in a manner shown in FIG. 5.
Thus, in the illustrated position of the spring 25 it will urge the
plate 27 in a clockwise direction about the pivot 16 to maintain
the cover plate 27 in its closed position. However, when the cover
plate 27 is swung to the open position shown in dot-dash lines in
FIG. 5, the upper end of the spring 25 will become situated closest
to the lower end thereof when this upper end is in a plane which
contains the axis of the pivot pin 16 and the axis of the pin to
which the lower end of the spring 25 is connected. When the upper
end of the spring 25 is in this latter plane the spring is at its
dead center position. As soon as the upper end of the spring 25
moves beyond this dead center position in a counterclockwise
direction, as viewed in FIG. 5, around the axis of the pivot pin
16, the spring 25 will again tend to expand and will resiliently
urge the plate 27 to the dot-dash line position, so that the single
over-center spring 25 of FIG. 5 will maintain the plate 27 both in
its open position and in its closed position.
As is apparent from FIGS. 6 and 7, the means for retaining the
cover plates either in their open position or in their closed
position can be directly connected with the manually operable means
13. Thus, FIG. 6 shows an over-center spring 30 connected at one
end 32 to the slide plate 13 for movement therewith, while the
other end 33 is supported on a stationary pivot. Thus, as the plate
13 is shifted forwardly in the direction of the arrow 24 shown in
FIG. 6, the top end of the spring 30 will approach a vertical plane
which contains the axis of the pivot on which the end 33 of the
spring 30 is mounted. When the two ends of the spring 30 are in
this vertical plane, the spring 30 is in its dead center position.
As soon as the top end of the spring 30 moves to the right beyond
the vertical plane containing the pivot axis of the end 33 of the
spring 30, the spring 30 will tend to expand to urge the plate 13
in the direction of the arrow 24, and thus the spring 30 will serve
to maintain the cover plates 3 and 4 in their open position. During
retraction of the slide 13, as soon as the top end of the spring 30
moves to the left of the lower end thereof, the spring 30 will act
to urge the plate 13 to the left, as viewed in FIG. 6, thus
maintaining the plate 13 in its rear position corresponding to the
closed position of the plates 3 and 4.
According to the embodiment of the invention shown in FIG. 7, the
lower edge 36 of the plate 13 is formed with a pair of downwardly
directed V-notches 38 and 40. The housing 1 carries at its bottom
wall a spring-pressed ball 42 which forms a detent structure with
the V-notches 38 and 40. Thus, when the plate 13 is in its
retracted rear position, corresponding to the closed position of
the cover plates 3 and 4, the ball 42 is received in the front
notch 40, while when the plate 13 is shifted forwardly the ball 42
will be received in the notch 38 when the plate 13 has reached a
position corresponding to the open position of the cover plates 3
and 4. Thus the detent structure of FIG. 7 will also serve to
retain the cover plates 3 and 4 either in their open or closed
position.
While an arrangement as shown in FIG. 5, where there is a single
cover plate 27, is capable of achieving the desired results, this
arrangement has a certain disadvantage with respect to the fact
that the single cover plate 27 will project forwardly beyond the
top wall of the camera through a substantial distance when the
cover plate 27 is in the open position shown in dot-dash lines in
FIG. 5. By providing a pair of plates 3 and 4, however, the extent
to which the plates 3 and 4 increase the dimensions of the top and
bottom walls of the camera is substantially reduced, being no more
than half the extent of increase provided by a single plate 27, so
that the use of a pair of plates 3 and 4 is preferred for those
situations where it is undesired to increase substantially the
forward extension of the cover plates beyond the front wall 2 of
the camera.
A further feature of the invention resides in the fact that the
cover plates 3 and 4 engage each other along a line of contact 26
indicated in FIG. 3. This line of contact 26 where the edges of the
plates 3 and 4 engage each other serves to provide the required
closure of the front wall openings and the required protection of
the camera. In accordance with the invention the line of contact 26
of the free edges of the cover plates 3 and 4 is situated forwardly
of a plane which contains the axes of the pivots 15 and 16. As a
result the extent to which the plates 3 and 4 must be swung between
their closed and open positions is reduced. Thus, the relatively
small extent of longitudinal movement of the slide 13 along an end
of the housing 1 is apparent from the distance between the
V-notches 38 and 40 of FIG. 7. With this small extent of movement
it is possible to swing the plates 3 and 4 between their open and
closed positions at least in part because of the location of the
line of contact 26 forwardly of the plane which contains the axes
of the pivots 15 and 16.
With the embodiments of the invention described above, each cover
plate can take the form of a relatively rigid stable component
manufactured by injection molding, for example, so that the
reliable functioning of the cover plate structure of the invention
is assured. As was indicated above, the cover plate which swings
upwardly to its open position also functions at the same time as a
sun shade.
It is furthermore to be noted that where the cameras has a pair of
cover plates 3 and 4 which are swingable equally and oppositely, if
these plates are actuated from a manually operable means such as
the shiftable slide 13, then the actuation of such a pair of cover
plates is easier to bring about because of the smaller paths of
swinging movement of such a pair of cover plates, as contrasted
with a single cover plate as shown in FIG. 5. Thus the use of a
pair of cover plates 3 and 4 is also of advantage when a manually
operable means is available for actuating the cover plates.
While the means 13 is shown in FIG. 3 as actuating both of the
cover plates, where they are connected to gear sectors which mesh
with each other, as shown in FIG. 4, it is possible to provide a
transmission from a means 13 only to one of the cover plates, and
the transmission to the other will be assured through the meshing
gear sectors.
The provision of the gear sectors at both ends of the cover plates
is of advantage with respect to the stability and rigidity of the
structure since in this way the cover plates will resist twisting
with each cover plate reinforcing the twisting resistance of the
other cover plate due to the meshing of the gear sectors at the
ends of the cover plates.
Moreover, the use of means for retaining the cover plates in their
end positions, such as the over-center springs referred to above or
the detent structure of FIG. 7 reliably prevents closing of the
cover plates when it is intended to maintain them open during use
of the camera. A further advantage of the invention resides in the
fact that the means 13 is very convenient to operate, requiring
only a simple longitudinal shifting movement forwardly or
rearwardly to bring about the desired swinging movement of at least
one of the cover plates.
Of course, the use of the blocking projection 23 prevents
inadvertent tripping of the shutter when the cover plates are in
their closed positions.
* * * * *