JPH0527745U - Single-lens reflex camera - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a mechanism that reliably links the aperture reset with the charge of the mirror with a simple configuration, save space, and realize a compact camera. [Structure] A mirror provided on the optical axis of the taking lens, which moves up and down, a shutter drive mechanism which drives a shutter, a diaphragm drive mechanism which drives an aperture, a shutter after release, and a mirror are charged. In a single-lens reflex camera having a shutter / mirror charge mechanism,
The shutter / mirror charge mechanism includes a shutter cam for charging the shutter driving mechanism, a cam gear coaxially provided with a mirror cam for charging the mirror, and a mirror charge operated by the mirror cam to charge the mirror. A single-lens reflex camera having a lever and a reset lever which is provided coaxially with the cam gear and which resets the diaphragm drive mechanism in conjunction with the operation of the mirror charge lever.

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention relates to a single-lens reflex camera having a diaphragm drive mechanism for driving a diaphragm and a shutter / mirror charge mechanism.

[0002]

[Prior art and its problems]

 In the single-lens reflex camera, it is preferable that the diaphragm drive mechanism is configured such that the diaphragm is reset to the open state after the exposure, until the mirror is down from the up position to reach the observation position. If the iris is not reset at such a timing, it is uncomfortable for the photographer because the opening of the iris can be seen in the viewfinder.

In order to reset the diaphragm drive mechanism at the timing as described above, the reset portion of the diaphragm drive mechanism has conventionally been provided with a cam gear having a dedicated cam, and further a dedicated operation lever that is interlocked with the cam gear. Was provided. For this reason, more space is required because there is a dedicated cam. In addition, a shutter cam that should charge the shutter drive mechanism and a mirror cam that should charge the mirror were also provided separately. Was hindering the compactness of the. Also, because the aperture reset was linked to the mirror down by linking the cam gear for exclusive use with aperture reset and the operating lever, it was difficult to match the operation timing.

[0004]

[The purpose of the device]

 In view of such a background, the present invention aims to realize a mechanism for surely linking the aperture reset to the charge of the mirror with a simple structure, to save space and to make the camera compact. It is a thing.

[0005]

[Outline of the device]

 The present invention is provided on the optical axis of a taking lens and is used to charge a mirror that moves up and down, a shutter drive mechanism that drives a shutter, a diaphragm drive mechanism that drives an aperture, and a shutter after release to charge the mirror. In a camera having a shutter / mirror charging mechanism for charging, the shutter / mirror charging mechanism is provided with a cam for a shutter for charging the shutter driving mechanism and a cam for a mirror for charging the mirror, which are coaxially integrated. And a mirror charge lever that is actuated by the mirror cam to charge the mirror, and a reset lever that is provided coaxially with the cam gear and that resets the diaphragm drive mechanism in conjunction with the operation of the mirror charge lever. To do.

[0006]

【Example】

 The present invention will be described below with reference to the illustrated embodiments. In the present embodiment, the present invention is applied to a single-lens reflex camera with a built-in flash that starts photometry when the shutter button is pressed halfway and releases the shutter when it is fully pressed.

As shown in FIG. 10, the grip part 11 provided on the camera body 12 has a grip rubber 14 mounted on the front side and a side cover 13 provided on the rear side part. A rear lid 15 is pivotally supported behind the grip portion 11 by a pivot shaft 15a. A spool 17 capable of accommodating a charging motor 18 therein is rotatably provided inside the camera grip 11, and a film motor 19, a strobe circuit 20, and a strobe circuit board 21 surround the spool 17. A sprocket 22, a strobe main capacitor 23, and a battery 24 are arranged. The strobe main capacitor 23 and the film motor 19 are arranged in parallel with each other. Reference numeral 16 in the figure denotes a front plate screwed to the camera body 12.

The peripheral portion of the spool 17 will be described in detail with reference to FIG. A gear 26 that constitutes a reduction gear train 29 is meshed with the gears 27 and 28 to a pinion gear 25 attached to a rotary shaft 18a that projects toward one end of the charge motor 18. The gear 28 meshes with a cam gear 32 which is rotatably supported on one end of a rotation support shaft 61.

The cam gear 32 has a shutter cam 30 and a mirror cam 31 coaxially and integrally, and is arranged so as to be located at the center of the mirror charge lever 33. Further, the diaphragm setting lever 34 is rotatably supported on the other end of the rotary support shaft 61, and therefore the shutter cam 30, the mirror cam 31, and the diaphragm setting lever 34 are coaxially arranged. .. With these configurations, the structure can be simplified compared to the conventional structure in which the shutter cam, the mirror cam, the reset cam gear of the diaphragm drive mechanism, etc. were separately arranged, and the installation space for the members was significantly increased. Can be reduced to contribute to making the camera compact.

As shown in FIG. 2, the shutter cam 30 has an involute-shaped cam surface 30a whose diameter increases as it rotates, and a back surface portion 30b. The mirror cam 31 has a first rotating cam surface 31a having the largest diameter, a second rotating cam surface 31b having a smaller diameter than the cam surface 31a, and a back surface portion 31c. The mirror charge lever 33 is rotatably supported by a rotation support shaft 60, and is urged to rotate counterclockwise in the drawing by a coil spring 35. A roller pin 33a and an interlocking pin 88 are provided at a predetermined interval in the center of the mirror charge lever 33. The mirror charge lever 33 rotates about the rotation support shaft 60 when the roller pin 33a is pressed and moved by the mirror cam 31 that rotates counterclockwise.

The diaphragm reset lever 34 is urged to rotate counterclockwise in FIG. 2 by a spring means (not shown) and is in contact with the interlocking pin 88. The aperture reset lever 34 is pressed by the interlocking pin 88 that moves in the same direction as the mirror charge lever 33 rotates, and is rotated clockwise around the rotation support shaft 61, so that the aperture latch lever 87 (see FIG. 2, Figure 5) to reset (open) the aperture of the taking lens. Therefore, since the reset lever 34 is directly rotated by the mirror charge lever 33 interlocked with the mirror cam 31, the reset timing of the diaphragm drive mechanism can be surely linked to the down of the mirror. In FIG. 2, the diaphragm latch lever 87 shown by the two-dot chain line shows the position in the closed state after the release, and the diaphragm latch lever 87 shown by the solid line shows the state where the diaphragm is reset.

The mirror charge lever 33 pushes the mirror drive lever 90 with its tip (the left end in FIG. 2). In the figure, the mirror interlocking lever 90 shown by the solid line shows the position in the mirror down state after the completion of the mirror charge, and the mirror interlocking lever 90 shown by the chain double-dashed line shows the mirror up state after the release.

A switch board 36 a is provided coaxially with the rotation support shaft 60. The switch base plate 36a has contacts 113b and 113c which are not insulated from each other, a contact 113a which is insulated from these contacts 113b and 113c, and further has an interlocking protrusion 112 protruding downward. .. A bifurcated interlocking arm 115 for holding the interlocking protrusion 112 and interlocking the interlocking protrusion 112 is formed on the rotation base of the mirror charge lever 33. A switch lever 36b having a bifurcated contact brush 114 capable of sliding contact with the contacts 113a, 113b and 113c of the switch substrate 36a is fixed to the camera body 12 side. The switch board 36a and the switch lever 36b constitute a one-rotation switch 37 that detects that the cam gear 32 is rotated once.

The shutter charge lever 38 is rotatably supported by a rotation support shaft 89, and is urged to rotate counterclockwise in FIG. 2 by a spring means (not shown). The shutter charge lever 38 has a charge pin 38a at the tip and a roller pin 38b at the center. In the shutter charge lever 38, the roller pin 38b is brought into contact with the shutter cam 30 of the cam gear 32, and the roller pin 38b is pressed and moved by the shutter cam 30 rotating counterclockwise in FIG. It is rotated clockwise about the rotation support shaft 89. Reference numeral 91 in the figure denotes a shutter-side charge lever that charges the shutter by being pushed and moved by the charge pin 38 a moving in the same direction when the shutter charge lever 38 rotates clockwise.

In the vicinity of the film motor 19, a sun gear 41 and a planetary lever 42, which are coaxially and rotatably supported by a rotation support shaft 116, are arranged. The planetary lever 42 has a planetary gear 43 that meshes with the small-diameter gear 41 a of the sun gear 41. The sun gear 41 meshes with a gear 40 that meshes with a pinion gear 39 attached to the rotation support shaft of the film motor 19, and the rotation from the film motor 19 is transmitted via this gear 40.

A rewinding reduction gear train 49 including gears 44, 45, 46, 47 and 48 is arranged adjacent to the planetary gear 43. When the planetary gear 43 is rotated clockwise by the rotation based on the film motor 19 together with the planetary lever 42, the planetary gear 43 meshes with an adjacent gear 44 to rotate the rotation of the planetary gear 43 through a rewinding reduction gear train 49, and a through shaft 50. It is transmitted to the penetration shaft gear 51 and the rewinding gear 52 to rotate the rewinding fork 53 in the film rewinding direction.

Adjacent to the planetary gear 43, a large-diameter gear 56 and a small-diameter gear 55, which are coaxially integrated, are rotatably supported by a rotation support shaft 121. The small-diameter gear 55 meshes with the hoisting gear 54 provided on the outer circumference of the end portion of the spool 17. When the planetary gear 43 is rotated in the counterclockwise direction in the drawing together with the planetary lever 42 by the rotation based on the film motor 19, the planetary gear 43 meshes with the large diameter gear 56 to rotate the rotation through the small diameter gear 55. And the spool 17 is rotated in the film winding direction.

A sprocket 22 is provided adjacent to the spool 17. The sprocket 22 is meshed with the perforation 117 of the film F and is rotated as the film F is wound. A rotating plate 57 is attached to the lower end of the sprocket 22, and the winding amount of the film F is detected on the basis of the number of rotations of the rotating plate 57 being detected by the photo interrupter 58.

FIG. 8 is a view of FIG. 10 viewed from the direction of arrow A. The upper parent plate 123 is fixed to the upper portion of the camera body 12 by fixing screws 59. The upper parent plate 123 has a rotation support shaft 118 that rotatably supports the gear 26 of FIG. 10, and an upper stop plate 61 is fixed to the upper part of the upper parent plate 123 by a set screw 62. ing. The upper parent plate 123 is provided with an engagement positioning hole 64 for fitting and supporting the positioning protrusion 63 of the charge motor 18, and one end of the spool 17 provided inside the charge motor 18 coaxially with the motor 18. It has a rotary support step 65 for fitting the parts and rotatably supporting the parts.

At the other end of the spool 17, a rotation support protrusion 69 having a hoisting gear 54 on the outer periphery thereof is provided. The rotation support protrusion 69 has an opening 69a for allowing the lead wire 72 provided at the other end of the charge motor 18 to protrude outward. A motor bracket portion 78 (FIG. 11) is provided at the other end of the charge motor 18 (on the side opposite to the pinion gear 25). The motor bracket portion 78 has a lead wire guide portion 67 that is provided so as to project outward, and an oval-shaped positioning projection portion 66 that further projects from the lead wire guide portion 67. A pair of lead wire projecting holes 80 for letting out the lead wire 72 of the charge motor 18 to the outside is formed on the left and right sides of the lead wire guide portion 67 and the positioning protrusion 66. The motor bracket portion 78 further has a lead wire guide groove 79 formed from the pair of lead wire projecting holes 80 toward the lead wire guide portion 67.

A lower parent plate 68 is fixed below the camera body 12 by a set screw 75, and a lower stop plate 74 is fixed below the lower parent plate 68 by a set screw 73. The lower parent plate 68 has an insertion recess 68b for rotatably inserting the rotation support protrusion 69 of the spool 17, a support protrusion 68a inserted into the opening 69a of the rotation support protrusion 69 and slidably supporting the inner surface thereof. Also, it has a rotation support shaft 121 that rotatably supports a small-diameter gear 55 that meshes with the hoisting gear 54.

On the inner peripheral side of the support convex portion 68a, there is a positioning hole 68d having the same shape as that of the protruding portion 66, and a center of the positioning hole 68d for fitting and positioning the positioning protruding portion 66. It has a screw insertion hole 68c for inserting the fixing screw 71 to be screwed into the screw hole 120 of the positioning protrusion 66. Further, a lead wire guide hole 77 formed adjacent to the positioning hole 68d is provided on the inner peripheral side of the support convex portion 68a. The lead wire guide hole 77 allows the lead wire 72 extending from the pair of lead wire projecting holes 80 and along the lead wire guide groove 79 to be inserted further along the lead wire guide portion 67 and the positioning protrusion 66. Therefore, the lead wire 72, which is inserted into the lead wire guide hole 77, is pressed and supported between the lead wire guide hole 77 and the lead wire guide portion 67, so that the lead wire 72 is securely prevented from coming off and is attached to the lower parent plate 68. Positioned relative to.

As shown in FIG. 10, a strobe circuit board 21 and a film motor 19 are housed in a narrow space S surrounded by the side cover 13 of the camera grip 11, the battery 24, the spool 17, and the like. There is. As shown in FIG. 11, the strobe circuit board 21 is formed in a substantially L shape (hook shape) in which a rectangular plate is partially cut out. The hook-shaped notch 81 of the strobe circuit board 21 is formed to have substantially the same length as the axial direction of the rotary shaft 122 of the film motor 19. As a result, when the film motor 19 is closely arranged in the hook-shaped notch 81 along the rotation axis 122 in the longitudinal direction of the circuit board 21, the circuit board 21 and the motor 19 are effectively combined to form a rectangular shape as a whole. Therefore, the narrow space S extending in the vertical direction of the camera can be utilized extremely effectively and can be effectively housed and arranged in this space S.

Further, as shown in FIG. 10, the strobe circuit 20 is housed within the plan view of the film motor 19 around the rotation shaft 122, that is, within the width of the motor 19 in the direction orthogonal to the rotation shaft 122. Since it is provided on the flash circuit board 21, the film motor 19 and the circuit board 21 can be effectively combined to minimize the space S in a plan view. With these configurations, the film motor 19 and the strobe circuit board 21 in which the strobe circuit 20 and the circuit element 86 are arranged can be effectively housed in an extremely narrow space S surrounded by the battery 24, the spool 17, and the like. it can. Reference numeral 124 in FIG. 10 is a spring member for pressing the film F wound on the charge motor 18, and reference numeral 83 in FIG. 11 is a fixing screw for fixing the strobe circuit board 21 to the camera body 12.

A diaphragm driving mechanism for controlling the diaphragm to a set diaphragm diameter will be described with reference to FIG. This diaphragm drive mechanism is arranged adjacent to the spool 17 in FIG. 1, and has a main diaphragm latch lever 87 for abuttingly engaging one end of the diaphragm reset lever 34. The main aperture latch lever 87 is rotatably supported by the rotation support shaft 92 and has a latch claw 95 that can be engaged with the latch tooth 108b of the pulse plate 108. The spring attaching portion 94 of the main aperture latch lever 87 is hooked with the other end of the return spring 93 having one end attached to the camera body 12 side. It is urged to rotate clockwise.

An auxiliary diaphragm latch lever 97 is rotatably supported on the rotating support shaft 92 coaxially with the main diaphragm latch lever 87. The sub diaphragm latch lever 97 has a receiving projection 97a at one end and an interlocking lever 98 at the other end. A coil-shaped coupling spring 96 is fitted on the rotary support shaft 92, and one end of the coupling spring 96 is engaged with a spring hook portion 87b formed on the back side of the main aperture latch lever 87, and the other end thereof. The part is engaged with the interlocking lever 98. As a result, the main aperture latch lever 87 is urged to rotate counterclockwise in FIG. The main aperture latch lever 87 has an abutment protrusion 87a that can engage with the receiving protrusion 97a when rotating counterclockwise. Therefore, the main aperture latch lever 87 and the sub aperture latch lever 97 are the same. It can rotate integrally in the counterclockwise direction in the figure.

A diaphragm solenoid 99 is provided below the auxiliary diaphragm latch lever 97, and a floating portion 100 a of the plunger 100 of the diaphragm solenoid 99 is engaged with an interlocking notch 98 a of the interlocking lever 98. Therefore, the auxiliary diaphragm latch lever 97 can be rotated in the counterclockwise direction or held in the clockwise direction by the plunger 100 that is expanded and contracted by the demagnetization and excitation of the diaphragm solenoid 99. This allows the pulse plate 108 to be latched or released.

A rack support plate 104 slidably supported in the vertical direction by a slide support mechanism (not shown) has a rack 105 that meshes with a small diameter gear 106 of a large diameter gear 107 provided adjacent to the main aperture latch lever 87. is doing. The photographic lens (not shown) has a lens-side iris adjustment lever 101 that can move up and down in conjunction with its iris. This lens-side iris adjustment lever 101 is attached to the lens barrel 10a of the photographic lens at one end thereof. The return bar 110 hooked with is always biased upward in FIG. A slide plate 102 is provided on the opposite side of the rack support plate 104 from the rack 105. The slide plate 102 engages with the lens side diaphragm adjusting lever 101 when the photographing lens is mounted on the camera body 12, receives the biasing force of the return spring 110 via the adjusting lever 101, and moves the rack supporting plate 104. Energize upwards. A swing lever 103 on the mirror side is arranged at a position where it can abut the slide plate 102.

A pulse plate 108 is rotatably provided adjacent to the large-diameter gear 107. The pulse plate 108 has a large number of pulse holes 108a formed along the circumference, a large number of latch teeth 108b formed on the outer peripheral edge, and a small diameter gear 108c coaxially provided with the pulse plate 108. ing. A diaphragm photointerrupter 109 is provided adjacent to the pulse plate 108. The diaphragm photointerrupter 109 detects the number of rotationally moving pulse holes 108a to detect the rotational speed and rotational position of the pulse plate 108. To detect.

In the present camera having the above-described configuration, the shutter / mirror charge mechanism is in the state shown in FIG. 2 before the release in which the film F is wound up by one frame and the shutter charge and the mirror charge are completed. Is becoming In this state, the cam gear 32 is at the rotation position shown in the figure, the shutter charge lever 38 is at the initial position when the roller pin 38b is in contact with the back surface 30b of the shutter cam 30, and the mirror charge lever 33 is at the roller pin 33a. Is in the initial position in which the back surface 31c of the mirror cam 31 is brought into contact. The shutter-side charge lever 91 is at the shutter charge completion position shown by the solid line in the figure, and the mirror interlocking lever 90 is at the mirror charge completion position shown by the solid line in the figure. Further, since the mirror charge lever 33 is rotated most in the counterclockwise direction, the interlocking arm 115 moves the switch substrate 36a to the position shown in the figure with respect to the switch lever 36b via the interlocking protrusion 112. There is. As a result, the two contact brushes 114 are in contact with the adjacent contact points 113a and 113b, which are insulated from each other.

At this time, in the diaphragm driving mechanism, the mirror side swing lever 103 holds the slide plate 102 in the position shown in FIG. 5, and the lens side diaphragm adjusting lever 101 holds the slide plate 102 in the position shown in the figure against the return spring 110. Has been done. In this state, the aperture of the taking lens is fully open. In this state, the latch lever 87 is rotated clockwise by the diaphragm solenoid 99 that is excited and contracted via the interlocking lever 98 and the auxiliary diaphragm latch lever 97, and separates the latch claw 95 from the latch tooth 108b. The pulse plate 108 is released.

In this state, when the shutter button is pressed halfway, photometry is started. Then, when the shutter button is pressed all the way down, the mirror interlocking lever 90 is moved from the solid line position in FIG. Then, since the mirror side swing lever 103 is moved upward in FIG. 5 in conjunction with the movement of the mirror interlocking lever 90 to the position indicated by the chain double-dashed line, the lens side diaphragm which is restricted from moving upward by the slide plate 102. The adjusting lever 101 moves upward, and the throttle, which has been fully opened, starts reducing its diameter.

Since the rack 105 moving upward together with the slide plate 102 rotates the large diameter gear 107 clockwise through the small diameter gear 106, the small diameter gear 108 c, and hence the pulse plate 108, is rotated through the large diameter gear 107. It is rotated counterclockwise. At this time, the diaphragm photo interrupter 109 reads the movement change of the pulse hole 108a of the pulse plate 108 as the number of pulses corresponding to the change amount of the diaphragm, and sends the information to a control unit (not shown). In this control unit, the value based on the aperture information is compared with a preset value, and as a result, when it is determined that the aperture has a diameter corresponding to this set value, the aperture solenoid 99 is excited.

Then, the latch lever 87 which has released the auxiliary diaphragm latch lever 97 is rotated counterclockwise in the figure by the return spring 93, and the latch claw 95 is engaged with the latch tooth 108b as shown in FIG. To combine. As a result, the pulse plate 108 is prevented from rotating, and further movement of the slide plate 102 is restricted via the large diameter gear 107 and the rack 105. Therefore, the lens side diaphragm adjusting lever 101 is stopped at the proper diaphragm position via the slide plate 102.

After the exposure is completed, the charging motor 18 is driven to rotate in the charging completion direction, so that the cam gear 32 is rotated counterclockwise via the pinion gear 25 and the gears 26, 27 and 28. 31 presses the roller pin 33a outward by the first rotating cam surface 31a. As a result, the mirror charge lever 33 pushes the mirror drive lever 90 at the position of the chain double-dashed line in FIG. 2 upwards in FIG. Move it.

Similarly, the rotating shutter cam 30 pushes the roller pin 38b outward by its cam surface 30a, and rotates the shutter charge lever 38 clockwise in the drawing. As a result, the shutter charge lever 91 starts to be pressed and moved to the left in the figure in order to charge the shutter after the charge pin 38a operates. Further, the rotation of the mirror charge lever 33 causes the switch substrate 36a to rotate in the clockwise direction in the figure via the interlocking arm 115 and the interlocking projection 112, and to contact the mutually insulated contacts 1 13a and 113b. The two contact brushes 114 contact the contacts 113b and 113c which are not insulated from each other.

At the same time, the rotation of the mirror charge lever 33 moves the interlocking pin 88 in the same direction, pressing the diaphragm reset lever 34 to rotate it clockwise. As a result, the latch lever 87 located at the position shown by the chain double-dashed line in FIG. 2 is pushed by the aperture reset lever 34 in the aperture reset direction (rightward in FIGS. 3 and 6) against the return spring 93. It is moved by pressure and brought into the state of FIG.

When the cam gear 32 further rotates in the same direction from the state of FIG. 3, the cam surface 30a, which gradually increases in diameter in accordance with the rotation, further rotates the shutter charge lever 38 in the clockwise direction via the roller pin 38b. As a result, the shutter charge lever 91 is completely moved to the shutter charge completion position via the charge pin 38a (FIG. 4).

In addition, the roller pin 33a of the mirror charge lever 33, which is rotated clockwise to the maximum by the large-diameter first rotation cam surface 31a to move the mirror interlocking lever 90 to the mirror charge position, has the first rotation. By moving from the cam surface 31a to the second rotating cam surface 31b, the tip end thereof is gradually separated from the mirror interlocking lever 90. At this time, since the interlocking pin 88 also moves in the same direction by the rotation of the mirror charge lever 33, the diaphragm reset lever 34 rotates counterclockwise by the urging force (not shown), and the latch lever 87 moves to the position shown in FIG. Move away to the position indicated by the chain double-dashed line. At this time, since the plunger 100 is attracted to the permanent magnet of the throttle solenoid 99, the latch lever 87, which tends to rotate clockwise by the biasing force of the return spring 93, rotates slightly in the same direction. Further rotation is restricted by the head of the plunger 100, so that it is held at the diaphragm reset position in FIG.

When the cam gear 32 further rotates from the state shown in FIG. 4, the roller pin 33a of the mirror charge lever 33 is released from the second rotating cam surface 31b. Rotate. At the same time, the shutter charge lever 38 releases the roller pin 38b from the cam surface 30a, so that the roller pin 38b rotates until it abuts on the shutter cam 30b. By the rotation of the mirror charge lever 33, the switch substrate 36a is rotated counterclockwise through the interlocking arm 115 and the interlocking protrusion 112. Therefore, the contact brush 114, which has been in contact with the contacts 113b and 113c, comes into contact with the contacts 113b and 113a, so that the one-turn switch 37 detects one rotation of the cam gear 32. Based on the output of this detection signal to the control unit, the rotation of the charging motor 18 is stopped and the shutter / mirror charging mechanism is returned to the initial position.

On the other hand, after the shutter release is completed, the control unit outputs a rotation drive signal to the film motor 19 to rotate the film motor 19 in the film winding direction. The planetary gear 42 is rotated by the gear 41a, and the planetary gear 43 is meshed with the large-diameter gear 56. As a result, the spool 17 is rotated counterclockwise (upward in the winding direction) in FIG. 1 via the large diameter gear 56, the small diameter gear 55, and the hoisting gear 54. Then, the film F is wound up, and the number of rotations of the rotating plate 57 which rotates with the movement of the film F is read by the photo interrupter 58, and the signal of the control unit based on this is taken up and the film F is wound up by one frame. At that time, the film motor 19 is stopped.

When the rewinding switch (not shown) is turned on after the exposure of all the frames of the film F is completed, the film motor 19 is rotationally driven in the film rewinding direction based on the signal from the control section. Due to the rotation of the sun gear 41 based on this rotation, the planetary lever 42 rotates in the clockwise direction in the figure together with the planetary gear 43, and the planetary gear 43 meshes with the gear 44. Then, the rotation of the film motor 19 is transmitted to the gear 44 through the planetary gear 43, and thus to the rewinding reduction gear train 49, and further, through the through shaft 50, the through shaft gear 51, and the rewinding gear 52. The fork 53 rotates to rewind the exposed film F into the cartridge located on the side opposite to the spool 17.

At the time of driving the shutter / mirror charging mechanism and the film winding mechanism, the lead wire 72 extending from the lead wire projecting hole 80 of the charging motor 18 is the lead wire guide groove 79 and the lead wire guide. The lead wire guide hole 77 is inserted along the portion 67 and is inserted into the lead wire guide hole 77. The lead wire guide portion 67 and the lead wire guide hole 77 are pressed and supported from the opening 69a to the outside of the spool. There will be no inconvenience such as the line 72 interfering with the rotation of the spool 17.

Although the charging motor 18 is coaxial with the spool 17 in this embodiment, the shape of the charging motor 18 does not have to be coaxial with the spool 17.

[0045]

[Effect of the device]

 As described above, according to the single-lens reflex camera of the present invention, the shutter cam and the mirror cam are configured as a coaxial coaxial cam gear, and the reset lever for resetting the diaphragm drive mechanism is provided coaxially with the cam gear. The structure can be simplified compared to the conventional structure in which a cam, a mirror cam, a cam gear for resetting the diaphragm drive mechanism, and a dedicated operating lever that works with the cam gear are provided. The number of cameras can be reduced to make the camera compact. Further, since the reset lever is actuated by the mirror charge lever that operates in conjunction with the mirror cam, the reset timing of the diaphragm drive mechanism can be easily and reliably adjusted to mirror down.

[Submission date] December 11, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0009

[Correction method] Change

[Correction content]

The cam gear 32 has a shutter cam 30 and a mirror cam 31 coaxially and integrally, and is provided on the camera body 12 side by a rotation support shaft 61 so as to be located substantially at the center of the mirror charge lever 33. The diaphragm setting lever 34 is rotatably supported, and at the other end of the rotation support shaft 61, a diaphragm setting lever 34 is rotatably supported . Therefore, the shutter cam 30, the mirror cam 31, and the diaphragm setting lever 34 are arranged coaxially , which allows the shutter cam, the mirror cam, the reset cam gear of the diaphragm driving mechanism, and the like to be separately arranged. The structure can be simplified compared to the conventional one, and the installation space for the members can be greatly reduced, contributing to the compactness of the camera.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

As shown in FIG. 2, the shutter cam 30 for driving the shutter has an involute-shaped cam surface 30a whose diameter increases as it rotates and a rear surface portion 30b. The mirror cam 31 for driving the mirror 131 (FIG. 5) has a first rotating cam surface 31a having the largest diameter, a second rotating cam surface 31b having a smaller diameter than the cam surface 31a, and a back surface portion 31c. is doing. The mirror charge lever 33 is rotatably supported on the camera body 12 side by a rotation support shaft 60, and is urged to rotate counterclockwise in FIG. 2 by a coil spring 35. Mirror charge lever 33 at a substantially central portion of its lower surface, the roller pin 33a and the interlocking pin 88 is provided at a predetermined interval. The mirror charge lever 33 rotates about the rotation support shaft 60 when the roller pin 33a is pressed and moved by the mirror cam 31 rotating counterclockwise in FIG .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

The diaphragm reset lever 34 is urged to rotate counterclockwise in FIG. 2 by the coil spring 134 , and is in contact with the interlocking pin 88. The aperture reset lever 34 is pressed by the interlocking pin 88 that moves in the same direction as the mirror charge lever 33 rotates, and is rotated clockwise around the rotation support shaft 61, and the aperture latch lever 87 (see FIG. 2, FIG. 5) is pressed to reset (open ) the aperture of the taking lens 132 (FIG. 10 ). Therefore, since the reset lever 34 is directly rotated by the mirror charge lever 33 interlocking with the mirror cam 31, the reset timing of the diaphragm drive mechanism can be surely linked to the down of the mirror. In FIG. 2, the aperture latch lever 87 indicated by the chain double-dashed line shows the position in the closed state after the release, and the aperture latch lever 87 shown by the solid line shows the state where the aperture has been reset.

[Procedure correction 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

The mirror charge lever 33 pushes the mirror drive lever 90 with its tip (the left end in FIG. 2). In FIG. 2 , the mirror interlocking lever 90 shown by the solid line shows the position in the mirror down state after the completion of the mirror charge, and the mirror interlocking lever 90 shown by the chain double-dashed line shows the mirror up state after the release.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014] The shutter charge lever 38 is rotatably supported by the rotation supporting shaft 89 is rotationally biased counterclockwise in FIG. 2 by coils springs 135. The shutter charge lever 38 has a charge pin 38a at the tip and a roller pin 38b at the center. In the shutter charge lever 38, the roller pin 38b is brought into contact with the shutter cam 30 of the cam gear 32, and the roller pin 38b is pressed and moved by the shutter cam 30 rotating counterclockwise in FIG. It is rotated clockwise about the rotation support shaft 89. Reference numeral 91 in the drawing denotes a shutter-side charge lever which is charged when the shutter charge lever 38 is rotated in the clockwise direction by being pressed and moved by the charge pin 38a moving in the same direction.

[Procedure Amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

As shown in FIG . 1, in the vicinity of the film motor 19, a sun gear 41 and a planetary lever 42 supported by the camera body 12 coaxially and relatively rotatably by a rotary support shaft 116. Are arranged. The planetary lever 42 has a planetary gear 43 that meshes with the small diameter gear 41 a of the sun gear 41. The sun gear 41 meshes with a gear 40 that meshes with a pinion gear 39 attached to the rotation support shaft of the film motor 19, and the rotation from the film motor 19 is transmitted via this gear 40.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0019

[Correction method] Change

[Correction content]

FIG. 8 is a view of FIG. 10 viewed from the direction of arrow A. The upper parent plate 123 is fixed to the upper portion of the camera body 12 by fixing screws 59. The upper parent plate 123 has a rotating shaft 118 for rotatably supporting the formic Ya 26, the upper portion of the upper parent plate 123 is fixed by a screw 62 fastened the upper stop plate 61. The upper parent plate 123 includes an engagement positioning hole 64 that fits the positioning protrusion 63 of the charge motor 18 and supports the positioning protrusion 63, and one end of the spool 17 provided inside the charge motor 18 coaxially with the motor 18. It has a rotary support step 65 for fitting the parts and rotatably supporting the parts.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

A diaphragm driving mechanism for controlling the diaphragm to a set diaphragm diameter will be described with reference to FIG. This diaphragm drive mechanism is arranged adjacent to the spool 17 in FIG. 1, and has a main diaphragm latch lever 87 for abuttingly engaging one end of the diaphragm reset lever 34. The main aperture latch lever 87 is rotatably supported on the camera body 12 side by a rotation support shaft 92 and has a latch claw 95 that can be engaged with the latch teeth 108b of the pulse plate 108. The spring attachment portion 94 of the main aperture latch lever 87 is hooked at the other end of the return spring 93, one end of which is attached to the camera body 12 side. This causes the main aperture latch lever 87 to move counterclockwise in FIG. Is biased to rotate in the direction.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

The rack support plate 104 slidably supported in the vertical direction by a sliding support mechanism (not shown) has a rack 105 that meshes with a small diameter gear 106 of a large diameter gear 107 provided adjacent to the main aperture latch lever 87. is doing. The photographic lens 10 ( FIG. 10 ) has a lens-side aperture adjustment lever 101 that can move up and down in conjunction with its aperture. The lens-side aperture adjustment lever 101 is a lens barrel 10a (FIG. 5) of the photographic lens 10 . ) Is always urged upward in FIG. 5 by a return spring 110 hooked at one end thereof. A slide plate 102 is provided on the opposite side of the rack support plate 104 from the rack 105. The slide plate 102 engages with the lens side diaphragm adjusting lever 101 when the taking lens 10 is mounted on the camera body 12, receives the biasing force of the return bar 110 via the adjusting lever 101, and receives the rack supporting plate 104. Is urged upward. A swing lever 103 on the mirror side is arranged at a position where it can come into contact with the slide plate 102.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

A pulse plate 108 is rotatably provided adjacent to the large-diameter gear 107. The pulse plate 108 has a large number of pulse holes 108a formed along the circumference, a large number of latch teeth 108b formed on the outer peripheral edge, and a small diameter gear 108c coaxially provided with the pulse plate 108. ing. Fotoi Ntaraputa 109 for grain and adjacent to the pulse plate 108 is provided, the narrowed photointerrupter 109, the movement change of the number of pulses holes 108a which rotationally moves, pulse number made to correspond to the change of the diaphragm And sends the information to the control unit 136 (FIG. 5).

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

At this time, in the diaphragm driving mechanism, the mirror side swing lever 103 holds the slide plate 102 in the position shown in FIG. 5, and the lens side diaphragm adjusting lever 101 holds the slide plate 102 in the position shown in the figure against the return spring 110. Has been done. In this state, the diaphragm of the taking lens 10 is fully opened. In this state, the latch lever 87 is rotated clockwise by the diaphragm solenoid 99 that is excited and contracted, via the interlocking lever 98 and the auxiliary diaphragm latch lever 97, and separates the latch claw 95 from the latch tooth 108b. The pulse plate 108 is released.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

In this state, when the shutter button is pressed halfway, photometry is started. Then, when the shutter button is fully pressed, the mirror interlocking lever 90 is moved from the solid line position in FIG. 2 to the alternate long and two short dashes position based on this, and the mirror 131 is moved to a position where it is possible to shoot (FIG. 6). ). Since the mirror side swing lever 103 in association with the movement of the two-dot chain line position of the mirror association lever 90 is moved upward direction (FIG. 6), the lens side which is regulated upward movement by slide plate 102 The diaphragm adjusting lever 101 moves upward, and the diaphragm that has been fully opened starts to reduce its diameter.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

Since the rack 105 moving upward together with the slide plate 102 rotates the large diameter gear 107 clockwise through the small diameter gear 106, the small diameter gear 108 c, and hence the pulse plate 108, is rotated through the large diameter gear 107. It is rotated counterclockwise. At this time, the movement change of the pulse holes 108a photointerrupter 109 of the pulse plate 108 down to read the number of pulses in correspondence with the variation of the diaphragm, and sends the information to the control unit 1 36. The control unit 136 compares the value based on the aperture information with a preset value, and as a result, when it determines that the aperture has a diameter corresponding to this set value, it sends a signal to the aperture solenoid 99. Output and excite this .

[Procedure Amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction content]

[0034] Then, since the latch lever 87 to release the auxiliary diaphragm latching lever 97 rotates counterclockwise in FIG. 5 by the return spring 93, La Tchitsume 95 is engaged with the latch teeth 108b (FIG. 6 ). As a result, the pulse plate 108 is prevented from rotating, and further movement of the slide plate 102 is restricted via the large diameter gear 107 and the rack 105. Therefore, the lens side diaphragm adjusting lever 101 is stopped at the proper diaphragm position via the slide plate 102.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction content]

After the exposure is completed, the charging motor 18 is driven to rotate in the direction to complete the charging , and the cam gear 32 is rotated counterclockwise via the pinion gear 25 and the gears 26, 27 and 28, so that the mirror is rotated. The use cam 31 presses the roller pin 33a outward by the first rotating cam surface 31a. Thus, the center mirror char Jireba 33 the rotation shaft 60, with its tip, the mirror interlock lever 90 in the two-dot chain line position in FIG. 2, in order to charge the mirror 131, pressed upward in the drawing To move.

[Procedure 16]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

[0036] Similarly, the shutter cam 30 to rotate is pressed and moved outward the roller pin 38b by the cam face 30a, and rotates the shutter charge lever 38 in the clockwise direction in FIG. This causes the shutter charge lever 91 to start pressing and moving to the left in FIG. 2 in order to charge the shutter after the charge pin 38a is operated. Further, by the rotation of the mirror charge lever 33, the switch substrate 36a is rotated in the clockwise direction in the figure through the interlocking arm 115 and the interlocking protrusion 112, and contacts the mutually insulated contacts 113a and 113b. two contact brushes 114 are in contact with the contacts 113b and 113c are threaded through guide each other (Fig. 3).

[Procedure Amendment 17]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

At the same time, the rotation of the mirror charge lever 33 moves the interlocking pin 88 in the rotation direction of the lever 33 , pressing the diaphragm reset lever 34 to rotate it in the clockwise direction in FIG . As a result, the latch lever 87 located at the position indicated by the chain double-dashed line in FIG. 2 is moved by the aperture reset lever 34 in the aperture reset direction (rightward in FIGS. 2 and 6) against the return spring 93. is pressed and moved, FIG. 3, is the state of FIG.

[Procedure 18]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

In addition, the roller pin 33a of the mirror charge lever 33, which is rotated clockwise to the maximum by the large-diameter first rotation cam surface 31a to move the mirror interlocking lever 90 to the mirror charge position, has the first rotation. By moving from the cam surface 31a to the second rotating cam surface 31b, the tip end thereof is gradually separated from the mirror interlocking lever 90. At this time, since the interlocking pin 88 also moves in the same direction by the rotation of the mirror charge lever 33, the diaphragm reset lever 34 rotates counterclockwise by the biasing force of the coil spring 134 (FIG. 1) and latches. It moves away from the lever 87 to the position shown by the chain double-dashed line in FIG. At this time, since the plunger 100 is attracted to the permanent magnet of the throttle solenoid 99, the ratchet lever 87, which tends to rotate clockwise in the figure by the urging force of the return spring 93, slightly rotates in the same direction. Further rotation of the plunger 100 is restricted by the head of the plunger 100, and thus the plunger 100 is held at the diaphragm reset position in FIG.

[Procedure Amendment 19]

[Document name to be amended] Statement

[Item name to be corrected] 0040

[Correction method] Change

[Correction content]

When the cam gear 32 further rotates from the state shown in FIG. 4, the roller pin 33a of the mirror charge lever 33 is released from the second rotating cam surface 31b. Rotate. At the same time, the shutter charge lever 38 releases the roller pin 38b from the cam surface 30a, so that the roller pin 38b rotates until it abuts on the shutter cam 30b. By the rotation of the mirror charge lever 33, the switch substrate 36a is rotated counterclockwise via the interlocking arm 115 and the interlocking protrusion 112. Therefore, the contact brush 114, which had been in contact with the contacts 113b and 113c, comes into contact with the contacts 113b and 113a, so that the one-rotation switch 37 detects one rotation of the cam gear 32. Based on the output of this detection signal to the controller 136 , the rotation of the charging motor 18 is stopped and the shutter / mirror charging mechanism is returned to the initial position.

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction content]

On the other hand, after the shutter release is completed, the control unit 136 outputs a rotation drive signal to the film motor 19 to rotate the film motor 19 in the film winding direction . The planetary lever 42 is rotated in the clockwise direction in the figure by the small diameter gear 41a that rotates in the clockwise direction , and the planetary gear 43 meshes with the large diameter gear 56. As a result, the spool 17 is rotated counterclockwise (winding direction) in FIG. 1 via the large diameter gear 56, the small diameter gear 55, and the hoisting gear 54. Then, the film F is wound up, and the number of rotations of the rotating plate 57 that rotates with the movement of the film F is read by the photo interrupter 58, and the signal of the control unit 136 based on this is read, and the film F corresponds to one frame. The film motor 19 is stopped when it is wound up.

[Procedure correction 21]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

When the rewinding switch (not shown) is turned on after the exposure of all the frames of the film F is completed, the film motor 19 is rotationally driven in the film rewinding direction based on the signal from the control unit 136 . The rotation of the sun gear 41 based on this rotation causes the planet lever 42 to rotate in the clockwise direction in the figure together with the planet gear 43, and the planet gear 43 meshes with the gear 44. Then, the rotation of the film motor 19 is transmitted to the gear 44 via the planetary gear 43, and thus to the rewinding reduction gear train 49, and further to the rewinding fork 53 via the penetrating shaft 50, the penetrating shaft gear 51, and the rewinding gear 52. There is rotated, position to the cartridge exposed film F in is rewinding on the opposite side of the spool 17.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a shutter / mirror charge mechanism and a film winding / rewinding mechanism of a single-lens reflex camera to which the present invention is applied.

FIG. 2 is a plan view showing a state before release of the shutter / mirror charge mechanism.

FIG. 3 is a plan view showing a state immediately before completion of mirror charge after release of the shutter / mirror charge mechanism.

FIG. 4 is a plan view showing a state immediately before the shutter charge is completed after the shutter / mirror charge mechanism is released.

FIG. 5 is a side view showing a diaphragm opening state of the diaphragm driving mechanism before release.

FIG. 6 is a side view showing a narrowed state of the diaphragm driving mechanism after release.

FIG. 7 is a side view showing a state immediately before completion of aperture reset after completion of exposure of the aperture drive mechanism.

FIG. 8 is a front sectional view showing in detail the motor support structure in the spool.

FIG. 9 is a bottom view showing the charging motor in the spool.

FIG. 10 is a plan sectional view showing an arrangement of each element in the camera grip portion.

FIG. 11 is a side view showing an assembled state of the film motor and the strobe circuit board.

[Explanation of symbols]

 11 Camera Grip Part 12 Camera Body 13 Side Cover 14 Grip Rubber 15 Rear Lid 17 Spool 18 Charging Motor 18a Rotating Shaft 19 Film Motor 20 Strobe Circuit 21 Strobe Circuit Board 22 Sprocket 23 Strobe Main Capacitor 24 Battery 29 Reduction Gear Train 30 Shutter cam 31 Mirror cam 32 Cam gear 33 Mirror charge lever 33a Roller pin 34 Aperture reset lever 35 Coil spring 37 One-turn switch 38 Shutter charge lever 38a Charge pin 38b Roller pin 41 Sun gear 42 Planetary lever 43 Planetary gear 49 Rewinding deceleration gear train 53 rewinding fork 54 hoisting gear 57 rotating plate 58 photo interrupter 63 positioning protrusion 64 engaging positioning hole 65 rotation support step 66 position Female protrusion 67 Lead wire guide portion 68 Lower parent plate 68a Supporting convex portion 68b Inserting concave portion 68c Screw insertion hole 68d Positioning hole 69 Rotating supporting protrusion 69a Opening 72 Lead wire 74 Lower stop plate 77 Lead wire guiding hole 78 Motor bracket portion 79 Lead wire guide groove 80 Lead wire protruding hole 81 Hook-shaped notch (notch) 86 Circuit element 87 Stopper latch lever 88 Interlocking pin 90 Mirror interlocking lever 91 Shutter side charge lever 93 Return spring 95 Latching claw 96 Coupling spring 97 Sub stop latch Lever 97a Receiving protrusion 98 Interlocking lever 98a Interlocking notch 99 Solenoid for diaphragm 100 Plunger 100a Floating part 101 Lens side diaphragm adjusting lever 102 Sliding plate 103 Mirror side swing lever 104 Rack support plate 105 Rack 106 Small diameter gear 107 Large diameter gear 08 pulse plate 108a pulses hole 108b latch teeth 108c small-diameter gear 109 diaphragm photointerrupter 110 return spring 112 interlocking projection 114 contacts the brush 115 interlock arm 122 rotates shaft 123 upper parent plate F film S space

[Procedure amendment]

[Submission date] December 11, 1992

[Procedure correction 22]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure amendment 23]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure amendment 24]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 25]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure Amendment 26]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 27]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure correction 28]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure correction 29]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

[Procedure amendment 30]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Change

[Correction content]

FIG. 11

Claims (1)

[Scope of utility model registration request] 1. A mirror provided on the optical axis of a taking lens for moving up and down; a shutter driving mechanism for driving a shutter; a diaphragm driving mechanism for driving an aperture; a shutter after charging is released, and a mirror is charged. In a single-lens reflex camera having a shutter / mirror charge mechanism for charging, the shutter / mirror charge mechanism coaxially includes a shutter cam for charging the shutter drive mechanism and a mirror cam for charging the mirror. A cam gear; and a mirror charge lever that is operated by the mirror cam to charge the mirror;
A single-lens reflex camera, which is provided coaxially with the cam gear, and which has a reset lever that resets the diaphragm drive mechanism in conjunction with the operation of the mirror charge lever.