Camera with a built-in strobe having a gripping section and a finger intrusion prevention screen
This is a continuation of application Ser. No. 07/998,181, filed Dec. 28, 1992, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a camera, or more particularly, to a camera with a built-in strobe. 
     2. Related Background Art 
     Various models of strobe built-in type cameras have been commercialized in the past. Many models of cameras have made their debuts in recent years, wherein a zoom lens is incorporated as a means for providing sophisticated functions. In these cameras, a strobe is located at one end of a camera housing with respect to a lens barrel, and a gripping section of the camera housing and a release member are arranged at the other end of the camera housing. In a background of having determined the above arrangement of the members, an effort has been made to prevent a red-eye phenomenon by maximizing a distance d between a lens and a strobe. The red-eye phenomenon is correlated to an angle θ0 between a lens and a strobe with respect to a subject. To suppress the red-eye phenomenon, the angle θ must be increased; that is, the distance d must be increased. Examples of a camera satisfying these prerequisites will be described below. 
     FIG. 15 is a front view of a camera of a related art in which components are laid out to meet the above prerequisites. 
     In the first related art, as shown in FIG. 15, a cartridge chamber PT is located in the right-hand area (left in FIG. 15) of a camera housing and a spool chamber SP is located in the left-hand area of the camera housing. A lens barrel L is located between the cartridge chamber PT and spool chamber SP. A battery storage BT is located on the left-hand side of the spool SP. A strobe ST is located above the battery storage BT. In this layout, a distance d4 between the lens and strobe ST is long enough. RS, AF, F, and W in FIG. 15 respectively denote a release button, an auto-focus unit, a viewfinder unit, and a film wind/rewind gear array. Alphanumeric characters h4 and r4 denote a height of the camera housing and a distance between an optical axis and a right-hand side surface of the camera housing (side surface of a gripping section) respectively. 
     In the foregoing layout of the first related art, the distance r4 between the optical axis and right-hand side surface of the camera housing is so short that when a user holds the camera, the fingers of the right hand gripping the camera are likely to intrude into the front of the lens to intercept part of a beam. Moreover, since the user&#39;s thumb interferes with a projection of the lens barrel, the camera is hard to grip. 
     FIG. 16 is a front view of a camera of the second related art in which components are laid out to meet the foregoing prerequisites. 
     In the camera of the second related art, a battery storage BT is located on the right-hand area (left in FIG. 16) of a camera housing. This is a difference from the camera of the first related art. According to this layout, a distance d5 between a strobe ST and a lens barrel L becomes shorter than a distance d4 in the first related art. In the second related art, when the camera is put to practical use, the strobe ST is popped up in the arrow direction to provide a long distance d&#39;5. Z denotes a zoom drive. Alphanumeric characters h5 and r5 denote a height of the camera housing and a distance from an optical axis to the right-hand side surface of the camera housing (side surface of a gripping section) similar to those in the first related art. 
     In the foregoing layout of the second related art, the distance r5 between the optical axis and the right-hand side surface of the camera housing is larger than the distance r4 in the first related art. Occurrence of the aforesaid drawbacks is diminished. However, since the strobe ST must be popped up as described above to avoid occurrence of a red-eye phenomenon resulting from a decrease in the distance d5 between the optical axis and the strobe, this related art is disadvantageous in terms of cost and space. 
     When a strobe and a gripping section of a camera housing are arranged with a lens barrel between as described above, the strobe occupies a large portion of the space of the camera housing. This is disadvantageous, in particular, to a compact camera which has been demanded to be more and more compact. 
     FIG. 17 is a front view of a third related art showing a single-lens reflex camera having a layout that meets the foregoing prerequisites. 
     The layout of the camera of the third related art greatly differs from the first and second related arts in a point that a strobe ST is located in the right-hand area (left in FIG. 17) of a camera housing: that is, on a gripping section of the camera housing. The appearance of the camera is shown in FIG. 18. A strobe 32 (aforesaid strobe ST) of a camera 31 is of a pop-up type. A release button 34 (release button RS)is located below the strobe 32 on the front of a camera housing 33 in a bid to prevent a finger from intruding into the strobe 32. As a result, a finger of a user&#39;s right hand for manipulating release comes to lie on the front of the camera housing 33 in a natural manner. This prevents a finger from intruding into the strobe 32 located above the release button 34. 
     The above layout has succeeded in increasing a distance d6 between a lens and a strobe ST. The strobe ST is designed, similarly to that in the second related art, to pop up in the arrow direction. Therefore, the distance d6 becomes further longer. MD and AD denote a mirror aperture drive unit and an auto-focus lens drive unit respectively. Alphanumeric characters h6 and r6 denote a distance from a release button RS to a bottom of a camera housing and a distance from an optical axis to a right-hand side surface of a camera housing (side surface of a gripping section) respectively. 
     In the foregoing layout of the third related art, the distance r6 between the optical axis and the right-hand side surface of the camera housing is relatively long. The aforesaid problems have thus been solved. However, since the strobe ST is located in the right-hand area of the camera, when a release button is located on the top of the camera, a beam traveling from the strobe ST may be intercepted by a finger. In an attempt to cope with this problem in this related art, a release button RS is arranged in the right-hand area of the front of the camera. However, in this layout, the index to little fingers of the right hand gripping the camera housing stays in an area equivalent to a distance h6 from the release button RS to the bottom of the camera housing. When the distance h6 is held equal to the distance h4 of the first related art, a space allocated to each of the fingers shrinks to disable stable gripping. When the distance h6 is increased in an attempt to improve grip-ability, the camera housing cannot help being made larger. 
     One of the prerequisites for a camera is to solve a problem that a photographer intercepts a strobe beam with his/her finger. 
     FIGS. 19 and 20 are front views of a general camera in which the above problem is solved, thus showing a fourth related art. 
     In the camera of the fourth related art, a release button 42 is located on the right-hand area (left in FIGS. 19 and 20) of the top of a camera housing 40, and a strobe 44 is located on the left-hand (right in FIGS. 19 and 20) upper area of the front of tile camera housing 40. Below the strobe 44, a projection 46 is formed on the front of the camera housing 40 to prevent a finger from intruding into the strobe 44. Specifically, when a user senses the projection 46 with the left hand, the user refrains from extending his/her finger beyond the projection 46. Thus, the projection 46 prevents a finger from intruding into the strobe 44. 
     In the foregoing fourth related art, similarly to a majority of general cameras on the market, the release button 42 is located on the right-hand area of and the top of the camera housing 40. Therefore, the positions of the fingers of the right hand are specified in a natural manner; that is, the index finger rests on the release button 42, the middle, ring, and little fingers stay on the front of the camera housing 40, and the thumb rests on the back of the camera housing 40. On the other hand, the positions of the fingers of the left hand are hardly specified. This is because the left hand does not take part in release manipulation but plays mere a supplementary role in holding a camera housing. Besides, a way of gripping a camera with the left hand varies from user to user. In particular, when taking photographs, a user is usually not conscious of the presence of the projection 46. As shown in FIG. 20, therefore, a finger of the left hand may screen the strobe 44 without sensing the projection 46. In this case, the user is unaware that his/her finger has intruded into the strobe 44, and takes a photograph. 
     OBJECTS AND SUMMARY OF THE INVENTION 
     A first object of the present invention is to provide a camera that makes it possible to grip a camera housing with ease and reduce occurrence of a red-eye phenomenon without employing a complex mechanism and increasing the size or the camera housing. 
     A second object of the present invention is to provide a camera capable of improving the freedom of the user&#39;s left hand during photography, preventing a finger from screening a strobe unexpectedly during photography, and being designed compactly. 
     A third object of the present invention is to provide a camera capable of informing a user of a non-photographic state reliably and preventing incorrect manipulation of release in the non-photographic state. 
     A fourth object of the present invention is to provide a camera capable of ensuring stable gripping, alleviating a hand tremor, and reducing a load a user incurs in gripping a camera housing. 
     A fifth object of the present invention is to provide a camera capable of suppressing a reduction in a quantity of strobe light due to circulation of a lead wire, and simplifying product and quality control in physical distribution. 
     A sixth object of the present invention is to provide a camera permitting excellent operability and having a main switch that accentuates the design of the camera. 
     Briefly, a camera according to the present invention comprises a camera housing, an optical system located substantially in the center of the camera housing, a gripping section formed at an end of the camera housing, a release member installed above the gripping section and on the top of the camera housing, a strobe which is arranged on the front of the camera between the release member and the gripping section in such a manner that when the camera housing is gripped by a human hand, the strobe will come between a finger for manipulating release and the other fingers for gripping the gripping section, and a finger intrusion prevention member that has a convex portion for preventing any of the fingers for gripping the gripping section from intruding into the strobe. This alleviates a red-eye phenomenon, and prevents vignetting of strobe light by any of the fingers for gripping the camera. 
     The above objects and advantages of the present invention will be apparent from the detailed explanation given below. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a front view showing a layout of components of a camera of a first embodiment of the present invention; 
     FIG. 2 is a plan view showing a layout of components of the camera of the first embodiment; 
     FIG. 3 is an enlarged oblique exploded view showing peripheral components of a strobe in the camera of the first embodiment; 
     FIG. 4 is a front view showing a state in which a strobe screen member of the camera of the first embodiment lies at an exposure position; 
     FIG. 5 is a top plan view of the camera shown in FIG. 4; 
     FIG. 6 shows an A--A cross section of the camera shown in FIG. 4; 
     FIG. 7 is a front view showing a state in which the strobe screen member of the camera shown in FIG. 4 lies at a screen position; 
     FIG. 8 is a top plan view of the camera shown in FIG. 7; 
     FIG. 9 shows a state in which the strobe screen member of the camera shown in FIG. 7 screens a viewfinder object window; 
     FIG. 10 is a front view showing a layout of components of a camera of a second embodiment of the present invention; 
     FIG. 11 is a front view showing a layout of components of a camera of a third embodiment of the present invention; 
     FIG. 12 is a front view of a camera of a fourth embodiment of the present invention; 
     FIG. 13 is a top plan view of the camera shown in FIG. 12; 
     FIG. 14 is a front view showing a state in which a lens screen member of the camera shown in FIG. 12 lies at a screen position; 
     FIG. 15 is a front view showing a layout of components of a camera of the first related art; 
     FIG. 16 is a front view showing a layout of components of a camera of the second related art; 
     FIG. 17 is a front view showing a layout of components of a camera of the third related art; 
     FIG. 18 is a front view of the camera shown in FIG. 17; 
     FIG. 19 is a front view showing a state in which a camera of the fourth related art is correctly held by a user; and 
     FIG. 20 is a front view showing a state in which the camera shown in FIG. 19 is incorrectly held by a user. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIGS. 1 and 2 show layouts of components of a camera of the first embodiment of the present invention. FIG. 1 is a front view, and FIG. 2 is a plan view. 
     The camera of the first embodiment consists mainly of a camera housing 2, a cartridge chamber PT formed in the right-hand area (left in FIGS. 1 and 2) of a camera frame 1 in the camera housing 2, a spool chamber SP formed in the left-hand area of the camera frame 1, an aperture 3 (See FIG. 2) formed in the middle of a bridge between the cartridge chamber PT and spool chamber SP, a lens barrel L that is installed in front of the aperture 3 along an optical axis and in which a zoom lens unit is incorporated, a zoom lens drive unit Z that is installed between the lens barrel L and the cartridge chamber PT and transmits driving force to the lens barrel L, a viewfinder F installed above the zoom lens drive unit Z, an auto-focus range finder AF (hereafter, range finder AF) installed above the lens barrel L, a strobe ST installed in the upper front of the cartridge chamber PT, a battery storage BT installed in the lower front of the cartridge PT, a release button RS installed above the strobe ST and on the top of the camera housing 2 covering the camera frame 1, and a film wind/rewind gear array W installed below the camera frame 1. 
     Alphanumeric characters h1, h&#39;1, d1, and r1 in FIG. 1 denote a distance between the release button RS and the bottom of the camera housing 2, a distance between the strobe ST and the bottom of the camera housing 2, a distance between the optical axis and the center of the strobe ST, and a distance between the optical axis and the right-hand side surface of the camera housing 2 respectively. 
     FIG. 3 is an enlarged oblique view showing peripheral components of a strobe ST in the camera of the first embodiment. 
     As shown in FIG. 3, a strobe unit S consists mainly of a battery storage 11 capable of accommodating two batteries (aforesaid battery storage BT), a strobe substrate 13 placed on the battery storage 11, a strobe main capacitor 9 installed behind the battery storage 11 and connected to the strobe substrate 13 via a terminal formed on the bottom of the strobe substrate 13, a battery contact strip 15 that is formed on the top inner wall of the battery storage 11 and serves as a contact for conducting batteries (not shown) accommodated in the battery storage 11, and a strobe 8 (aforesaid strobe BT) placed on the top of the strobe substrate 13. 
     The battery contact strip 15 is connected to terminals 15a and 15b at its proximal end and thus attached to the strobe substrate 13. The strobe 8 comprises a xenon flashtube 8a, a reflector 8b, and a support member 8c for supporting these members. The strobe 8 flashes using electricity charged in the strobe main capacitor 9. A lead wire 19 for connecting between the strobe 8 and the strobe main capacitor 9 and various electrical parts are arranged on the strobe substrate 13. 
     The strobe unit 5 is united with the front of a cartridge chamber (aforesaid cartridge chamber PT) 1a. A main substrate 21 on which a release switch 21a is placed is united with the top of the cartridge chamber 1a. 
     FIGS. 4 and 5 show the appearance of a camera having the aforesaid construction. 
     A grip 4 constituting part of a camera gripping section is formed in the right-hand area of a camera housing 2. The grip 4 is swelling outwardly more than the other portion of the camera housing 2 as shown in FIG. 6, which, therefore, can be gripped easily by a user&#39;s right hand easily. 
     A release button 6 is located in the right-hand area of the top of the camera housing 2, and a strobe 8 is located in the upper right area on the front of the camera housing 2. A strobe screen member 10 is attached to the camera housing 2 so as to screen the strobe 8. The strobe screen member 10 is movable between an exposure position for exposing the strobe 8 as shown in FIGS. 4 and 6, and a screen position for screening, i.e. covering, the strobe 8 as shown in FIGS. 7 and 8. At the exposure position, a free end of the strobe screen member 10 projects forward and away from camera housing 2. 
     The strobe screen member 10 is connected to a main switch means, which is not shown, relating to an entire camera. When the strobe screen member is set at the exposure position, the camera is put in a photographic state or turned on. When the strobe screen member is set at the screen position, the camera is put in a non-photographic state or turned off. 
     When the strobe screen member 10 lies at the screen position, the left-hand end of the strobe screen member 10 projects toward the left-hand side of the strobe 8. Consequently, the strobe screen member 10 screens a viewfinder object window 20 (front of the aforesaid viewfinder F) (See FIG. 7). 
     In the center of the front of the camera housing 2, a lens barrel 14 (aforesaid lens barrel L) for holding a lens 12 is mounted in such a manner that the lens can stretch, i.e. extend, or contract along the optical axis. A pair of AF windows 16 are formed above the lens barrel 14. On the left-hand side of the lens barrel 14, an LED window 18 is formed as part of the camera housing 2. On the right-hand side of the lens barrel 14, a viewfinder object window 20 is formed on the front of the camera housing 2. A photometry window 22 is located above the viewfinder object window 20. 
     The operation of a camera of this embodiment having the aforesaid construction will be described. 
     When a strobe screen member 10 lies at a screen position as shown in FIGS. 7 and 8; that is, a camera is off, if a user looks into a viewfinder object window 20, part of the viewfinder object window 20 is seen, as shown in FIG. 9, screened by the distal end of the strobe screen member 10. Then, the user recognizes at sight that the camera is in a non-photographic state. 
     While holding a grip 4 with the right hand, the user slides the strobe screen member 10 from the screen position shown in FIGS. 7 and 8 to an exposure position shown in FIGS. 4 and 5 using the index finger of the right hand. This causes a main switch connected to the strobe screen member 10 to turn on the camera. Eventually, release is enabled. 
     At this time, the strobe screen member 10 has withdrawn from the field of the viewfinder object window 20. The strobe screen member 10 has exposed a strobe 8 and is projecting forward from the camera housing 2. 
     The fingers of the user&#39;s right hand gripping the camera housing 2 are located as described below. 
     Specifically, as shown in FIG. 4, the index finger is resting on a release button 6, the thumb is lying on the 10 back of the camera housing 2, and the middle to little fingers are staying in an area of a height h&#39;1 (See FIG. 1) from the strobe window 8 to the bottom of the camera housing 2 on the grip 4 located below the strobe 8. The middle finger is in contact with the strobe screen member 10 projecting forward from the camera housing 2 and lying on the grip 4. Thus, the positions of the fingers of the user&#39;s right are restricted by the strobe screen member 10 and the grip 4, while the user has no feeling of unnaturalness. Therefore, strobe light 23 will not be vignetted by the middle finger. 
     As for a user&#39;s left hand, a user can hold the fingers in any manner unless the user grips a camera in an especially abnormal fashion. Alternatively, a user need not use the left hand and may use the right hand alone to grip a camera. 
     The distance h&#39;1 mentioned above is shorter than the distance h4 or h5 in the first or second related art. This results from the presence of the strobe window 8. At sight, the camera appears poor in grip-ability. However, the camera of this embodiment successfully prevents a user&#39;s finger from screening the strobe window 8 while offering excellent camera grip-ability. This is attributable to such an adroit layout that when a user grips the camera housing 2 as shown in FIGS. 4 and 6, the user&#39;s three fingers of middle to little fingers stay at specific positions and the strobe window 8 comes between these fingers and the index finger for manipulating release. 
     In this embodiment, a distance r1 between the optical axis and the right-hand side surface of the camera housing 2 (See FIG. 1) is long enough to improve transverse grip-ability. A distance d1 between the strobe ST and optical axis (See FIG. 1) is long enough, helping diminish occurrence of a red-eye phenomenon without using a complex mechanism. 
     On the other hand, a strobe 8 (See FIG. 3), a strobe substrate 13 (See FIG. 3), and a battery storage 11 (See FIG. 3) are integrated to form a unit. This minimizes a reduction in a quantity of strobe light due to circulation of a lead wire 19 (See FIG. 3), and simplifies product and quality control in physical distribution. 
     Since batteries whose weight occupies a large percentage of an overall weight of a camera are placed in the right-hand area of a camera housing, the camera has a center of gravity in the right-hand area. Therefore, when the camera housing is gripped, a smaller moment of inertia is applied to the right hand. Thus, stable gripping is ensured and a hand tremor is alleviated. A load a user incurs in holding the camera housing by grip 4 is diminished. 
     Moreover, finger intrusion to the strobe is reliably prevented without increasing the size of the camera or giving a user an unnatural feeling, while excellent grip-ability is provided. Furthermore, the strobe screen member 10 has a capacity for preventing finger intrusion and a capability of a main switch with excellent operability, and accentuates the design of the camera. 
     When photography is not performed, an indication appears in a viewfinder because of the strobe screen member. This informs a user of a non-photographic state, and, eventually, prevents the user from manipulating release in the non-photographic state. 
     FIG. 10 is a front view showing a layout of components of a camera of the second embodiment of the present invention. 
     The camera of the second embodiment consists mainly of a camera housing 2, a cartridge chamber PT formed in the right-hand area of a camera frame (not shown) similar to that in the first embodiment, a spool chamber SP formed in the left-hand area of the camera frame, an aperture (not shown) formed in the middle of a bridge between the cartridge chamber PT and the spool chamber SP, a lens barrel that is installed in front of the aperture and in which a zoom lens unit is incorporated, a zoom lens drive unit Z that is installed above the lens barrel L and transmits a driving force to the lens barrel L, a range finder AF installed above the zoom lens drive unit Z, a viewfinder F installed above the spool chamber SP, a strobe ST installed in the upper front the cartridge chamber P and near the right-hand side surface of the camera housing 2, a battery storage BT formed near the right-hand side surface of the camera housing, a release button RS installed above the strobe ST and on the top of the camera housing 2, and a film wind/rewind gear array W installed below the camera frame. 
     Alphanumeric characters h2, d2, and r2 in FIG. 10 denote a distance between the release button RS and the bottom of the camera housing 2, a distance between the optical axis and the strobe unit ST, and a distance between the optical axis and the right-hand side surface of the camera housing 2. 
     A mode of gripping this embodiment having the aforesaid construction is identical to that of the first embodiment. This embodiment has the same advantages as the first embodiment. Specifically, the distance r2 between the optical axis and the right-hand side surface of the camera housing 2 is long enough to improve transverse grip-ability. Moreover, the distance d2 between the strobe unit ST and the optical axis is long enough to diminish occurrence of a red-eye phenomenon without using a complex mechanism. Furthermore, since batteries whose weight occupies a large percentage of an overall weight of the camera are placed in the right-hand area of the camera housing, the camera has a center of gravity which lies in the right-hand area of the camera housing. Therefore, when the right-hand area of the camera housing is gripped, a reduced moment of inertia is applied to the right hand. Thus, stable gripping is ensured and a hand tremor is alleviated. A load a user incurs in holding the camera housing is diminished. 
     FIG. 11 is a front view showing a layout of components of a camera of the third embodiment of the present invention. 
     A great difference of the third embodiment from the aforesaid first and second embodiments is that the locations of a cartridge chamber PT and a spool chamber SP in a camera frame are reversed. 
     As shown in FIG. 11, the camera of the third embodiment consists mainly of a camera housing 2, a cartridge chamber PT formed in the left-hand area of a camera frame (not shown) similar to that of the first or second embodiment, a spool chamber SP formed in the right-hand area of the camera frame, an aperture (not shown) formed in the middle of a bridge between the cartridge chamber PT and the spool chamber SP, a lens barrel L that is installed in front of the aperture and in which a zoom lens unit is incorporated, a zoom lens drive unit Z that is installed on the upper left-hand side of the lens barrel L and transmits driving force to the lens barrel L, a range finder AF extending from above to the right-hand side of the lens barrel L, a viewfinder F installed on the upper right-hand side of the range finder AF, a strobe ST installed above the spool chamber SP, a battery storage BT formed on the front right-hand side of the spool chamber SP and near the right-hand side surface of the camera housing, a release button RS installed above the strobe unit ST and on the top of the camera housing 2, and a film wind/rewind gear array W part of which is installed below the camera frame and the other part of which is installed above the cartridge chamber PT. 
     Alphanumeric characters h3, d3, and r3 in FIG. 11 denote a distance between the release button RS and the bottom of the camera housing 2, a distance between the optical axis and the strobe ST, and a distance between the optical axis and the right-hand side surface of the camera housing 2 respectively. 
     A mode of gripping this embodiment constructed as mentioned above is identical to that of the first or second embodiment. This embodiment has the same advantages as the first or second embodiment. Specifically, the distance r3 between the optical axis and the right-hand side surface of the camera housing 2 is long enough to improve transverse grip-ability. Moreover, the distance d3 between the strobe ST and the optical axis is long enough to diminish occurrence of a red-eye phenomenon without using a complex mechanism. Furthermore, since batteries whose weight occupies a large percentage of an overall weight of a camera are placed in the right-hand area of the camera housing, the camera has a center or gravity in the right-hand area of the camera housing. Therefore, when gripping the camera housing, a user feels a smaller moment of inertia in the right hand. Thus, stable gripping is ensured and a hand tremor is alleviated. Consequently, a load a user incurs in holding the camera housing is diminished. 
     FIGS. 12 to 14 show the fourth embodiment of the present invention. 
     As shown in FIGS. 12 to 14, a release button 6 is located In the right-hand area (left in FIGS. 12 to 14) of the top of a camera housing 2. A lens barrel 14 is installed in the center of the front of the camera housing 2 in such a manner that the lens barrel 14 can advance or withdraw along the optical axis of a lens. An AF window 16, a photometry window 22, and a viewfinder object window 20 are formed as part of the camera housing 2 above the lens barrel 14 on the front of the camera housing 2. 
     A lens screen member 24 capable of screening all of the lens barrel 14, AF window 16, photometry window 22, and viewfinder object window 20 is installed on the front of the camera housing 2. The lens screen member 24 is supported by the camera housing 2 to be movable between an exposure position for exposing the above members as shown in FIGS. 12 and 13 and a screen position for screening the above members as shown in FIG. 14. 
     A strobe unit 8 is formed in the upper right-hand area of the front of the lens screen member 24. A projection 26 is formed as part of the front of the lens screen member 24 to fence the outer circumference of the strobe unit 8. 
     Half of the right-hand portion of the front of the lens screen member 24 serves as a grip 28 having a concave portion that enables a user to easily have a firm grip of the camera. 
     The lens screen member 24 has a capability of a main switch relating to an entire camera. When the lens screen member 24 is set at the exposure position, the camera is put in a photographic state or turned on. When the lens screen member 24 is set at the screen position, the camera is put in a non-photographic state or turned off. 
     The other components are almost identical to those of the first embodiment. 
     The operation of the camera of the fourth embodiment constructed as mentioned above will be described. 
     As shown in FIG. 14, when a lens screen member 24 lies at a screen position; that is, a camera is off, if a user looks into a viewfinder object window 20, the viewfinder object window 20 is seen completely screened by the lens screen member 24. Instantaneously, the user recognizes that the camera is in a non-photographic state. 
     When the user slides the lens screen member 24 to an exposure position shown in FIGS. 12 and 13 while gripping the camera with the right hand, the camera is turned on to enter a photography standby state. At this time, the field of the viewfinder object window 20 is not vignetted by the lens screen member 24. The fingers of the user&#39;s right hand gripping the camera are ready for photography and located as follows; the index finger rests on a release button 6, the thumb lies on the back of a camera housing 2, and the middle to little fingers stay below a strobe 8 on a grip 28 of the lens screen member 24. A projection 26 formed along the outer circumference of the strobe on the lens screen member 24 successfully restricts intrusion of the middle finger of the user&#39;s right hand, thus preventing the finger from intercepting strobe light. 
     As described so far, the fourth embodiment provides a camera that is capable of being designed compactly if necessary, successfully preventing a user&#39;s finger from intercepting strobe light, and providing excellent grip-ability, and that includes a lens screen member which has a capacity for preventing a user&#39;s finger from intercepting strobe light, a capability of a main switch, and a capacity for displaying an on or off state of the camera and that 
     In the present invention, it will be apparent that a wide range of different working modes can be formed on the basis of this invention without departing from the spirit and scope of the invention. This invention will not be restricted to any specific embodiment but be limited to the appended claims.