JP2007219140A - Camera system and camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the deviation of the rotating position of a lens unit without causing an increase in the size of a camera main body and a deterioration in operability. <P>SOLUTION: A main-body-side mount 20 in a blind hole state where a nearly regular octagonal aperture 20a is formed is provided on the front of the camera main body. Meanwhile, a lens-side mount 22 formed in nearly regular octagonal pillar shape is provided in a protruding manner on the back of the lens unit. A holding and fixing part 30 comprising a pair of lock members 31 and 32 and a moving mechanism 33 moving the lock members 31 and 32 slidably is provided inside the camera main body. The lock members 31 and 32 respectively have trapezoidal notches 31a and 32a formed to be fit to the lens-side mount 22. The holding and fixing part 30 holds and fixes the lens-side mount 22 inserted in the main-body-side mount 20 so as to bring the inclined surfaces of the respective notches 31a and 32a into contact with the side surface of the lens-side mount 22 inclined at about 45° to a holding direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an interchangeable lens camera system and a camera that detachably holds a lens unit having a lens barrel having a photographing lens provided on the front surface.

  A digital camera that captures a subject image with an image sensor such as a CCD image sensor, converts the image into digital image data, and records the digital image data on a recording medium such as a built-in memory or a memory card is becoming popular. In recent years, many interchangeable lens models have been sold that make it possible to easily obtain different lens characteristics by making the taking lens detachable as a lens unit.

In an interchangeable lens digital camera, dust or the like may enter the camera body when the lens unit is replaced. Dust or the like that has entered the camera body adheres to the imaging surface of the image sensor, causing image quality degradation or failure. In order to prevent this, for example, Patent Document 1 proposes a camera system in which an imaging element is provided on the lens unit side so that the imaging lens can be replaced without exposing the imaging element.
JP 2000-106640 A JP 2004-361898 A

  In an interchangeable lens digital camera or the like, a screw mount or bayonet mount with good optical axial accuracy is preferably used for connection between the lens unit and the camera body (see Patent Document 2). However, screw mounts and bayonet mounts have a problem that the rotational position around the optical axis is likely to be displaced due to mechanical errors or tightening conditions. For this reason, if a screw mount or bayonet mount is used to attach a lens unit that integrates a photographic lens and an image sensor, the image sensor is tilted with respect to the camera body, and the orientation of the camera body is acquired. The direction may be different. Further, when the rotational position is deviated, the terminals that electrically connect the camera body and the lens unit do not normally contact each other, resulting in malfunction or failure.

  Further, as described in Patent Document 2, a bayonet mount is also known in which a rotational position can be accurately adjusted by engaging a positioning pin. However, in such a bayonet mount, when the lens unit is removed, the lens unit must be rotated while releasing the engagement of the pin by operating a button or the like. It was not something that could be said.

  Furthermore, in the camera system described in Patent Document 1, the lens unit formed in a substantially rectangular parallelepiped shape is accommodated in the camera body, and the lens unit can be easily attached and detached without causing a shift in the rotational position. However, with such a configuration, there is a concern that the size of the camera body will be increased by the amount of space for housing the lens unit.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent displacement of the rotational position of the lens unit without causing an increase in the size of the camera body and a decrease in operability.

  In order to achieve the above object, a camera system of the present invention comprises a lens unit having a lens barrel provided with a photographing lens on the front surface, and a camera body that detachably holds the lens unit. Provided is a substantially columnar lens side mount projecting on the back surface of the lens barrel, and a reference plane formed on at least a part of the side surface of the lens side mount so as to be substantially parallel to the optical axis of the photographing lens. A substantially hole-shaped body-side mount into which the lens-side mount is inserted and removed from the camera body, and the lens-side mount inserted into the body-side mount so as to be in contact with the reference plane and fixed. The fixing means is provided.

  The clamping / fixing means releases a clamping position and a clamping position for clamping and fixing the lens-side mount inserted into the body-side mount, and a pair of lock members arranged so as to sandwich the body-side mount. A moving mechanism for moving at least one of the lock members between the lens-side mount and a release position that enables insertion and removal of the lens-side mount, and either a planar shape, a convex shape, or a concave shape according to the shape of the lens-side mount. And a contact portion provided on at least one of the lock members so as to come into contact with the reference plane when moved to the clamping position.

  Further, the moving mechanism moves at least one of the lock members to the clamping position and the release position, and closes the main body side mount when the lens side mount is not inserted. It is preferable to move.

  Further, the clamping and fixing means is slidably attached to the exterior case of the camera body and releases the clamping position and the clamping for clamping and fixing the lens-side mount inserted into the body-side mount together with the exterior case. A slide member that moves between a release position that enables insertion and removal of the lens side mount, and is formed in either a flat shape, a convex shape, or a concave shape according to the shape of the lens side mount, and at the holding position It is good also as a structure which consists of a contact part provided in at least one of the said exterior case and the said slide member so that it may contact with the said reference plane when it moves.

  The lens side mount is formed in a substantially regular octagonal prism shape, and the clamping and fixing means clamps and fixes the lens side mount with the side surface of the lens side mount inclined by about 45 degrees with respect to the clamping direction as the reference plane. It is preferable to do.

  Moreover, it is preferable that the said contact part is a substantially trapezoidal notch formed according to the shape of the said lens side mount.

  The camera body and the lens unit include a male connector provided on one of the main body side mount and the lens side mount, and a female connector provided on the other side. The male connector and the female unit The connector is preferably fitted when the clamping / fixing means clamps and fixes the lens-side mount to electrically connect the camera body and the lens unit.

  Further, the male connector includes a pin terminal for a positive electrode of a power source supplied from the camera body to the lens unit, a pin terminal for a negative electrode of the power source, and whether or not the lens unit is attached to the camera body. It is preferable that the negative electrode pin terminal is the longest and the detection pin terminal is the shortest.

  The camera body has a lid member that is movable between a position that covers the body-side mount and a position that exposes the body-side mount when the lens-side mount is not inserted. preferable.

  Preferably, the side surface of the lens side mount is provided with an engaging groove into which a part of the clamping and fixing means enters when being clamped and fixed.

  Furthermore, it is preferable that the lens unit is provided with an image sensor that photoelectrically converts a subject image formed by the photographing lens to acquire image data corresponding to the subject image.

  A lens barrel provided on the front surface of the lens barrel, a substantially columnar lens-side mount projecting on the back surface of the lens barrel, and a side surface of the lens-side mount so as to be substantially parallel to the optical axis of the shooting lens. A camera of the present invention that removably holds a lens unit having a reference plane formed at least in part is inserted into the body-side mount and a substantially hole-shaped body-side mount through which the lens-side mount is inserted and removed. Further, there is provided a clamping and fixing means for clamping and fixing the lens side mount so as to be in contact with the reference plane.

  In the camera system and the camera according to the present invention, the substantially columnar lens side mount projecting on the back surface of the lens barrel and the lens side mount are formed on at least a part of the side surface so as to be substantially parallel to the optical axis of the photographing lens. A substantially flat columnar body-side mount on which the lens-side mount is inserted and removed, and a lens-fixing means for clamping and fixing the lens-side mount inserted into the body-side mount so as to contact the reference plane. Is provided in the camera body. The clamping and fixing means determines the position of the lens side mount inserted into the main body side mount by contact with the reference plane and regulates the rotation around the optical axis, thus reliably preventing the deviation of the rotation position of the lens unit. Can do. Further, since only the lens side mount is inserted into the main body side mount, the camera main body is not enlarged. Furthermore, since the lens unit can be attached and detached simply by fixing and releasing the fixing by the clamping and fixing means, the operability is not deteriorated.

  FIG. 1 is a perspective view schematically showing the configuration of the camera system 10. The camera system 10 includes a camera body 11 and a lens unit 12. The lens unit 12 includes a lens barrel 13 formed in a substantially bottomed cylindrical shape, a photographing lens 14 provided on the front surface of the lens barrel 13, and a CCD (photoelectric conversion) for a subject image formed by the photographing lens 14. Image pickup device) 15. The camera body 11 holds the lens unit 12 in a detachable manner, sends and receives various control signals, and drives the CCD 15 to obtain digital image data corresponding to the subject image.

  Also, a plurality of types of lens units 12 are prepared in advance, for example, those with different focal lengths of the taking lens 14, those with different numbers of pixels of the CCD 15, those capable of monochrome photography, and those capable of infrared photography. The The camera system 10 can easily obtain image data suitable for the shooting situation by selectively mounting each lens unit 12 on the camera body 11.

  On the top surface of the camera body 11, various modes such as a release button 16 for instructing the camera system 10 to execute shooting, a still image shooting mode for shooting still images, and a playback mode for playing back and displaying the shot images are switched. A mode switching dial 17 is provided. Further, on the front surface of the camera body 11, a strobe light emitting unit 18 that irradiates a subject in accordance with execution of shooting and a bottomed hole-shaped body-side mount 20 in which a substantially regular octagonal opening 20a is formed are provided. Yes.

  On the other hand, on the back surface of the lens unit 12 facing the front surface of the camera body 11, a lens side mount 22 that is formed in a substantially regular octagonal column shape in accordance with the shape of the body side mount 20 is projected. The lens unit 12 is held by the camera body 11 by inserting the lens side mount 22 into the body side mount 20.

  As shown in FIG. 2, the lens side mount 22 includes a first outer diameter portion 24 attached to the back surface of the lens barrel 13 and a second outer diameter portion 25 formed to be slightly larger than the first outer diameter portion 24. It consists of and. The outer diameter of the second outer diameter portion 25 is formed to be larger than the outer diameter of the first outer diameter portion 24 and slightly smaller than the inner diameter of the main body side mount 20. Thereby, the lens side mount 22 is loosely inserted into and removed from the main body side mount 20 without fitting. Further, the length of the lens side mount 22 is adjusted to the depth of the main body side mount 20, and the back surface of the second outer diameter portion 25 is brought into contact with the inner bottom surface of the main body side mount 20, thereby Installation position is determined.

  Female connectors 26 for obtaining electrical connection with the camera body 11 are provided on both side surfaces of the first outer diameter portion 24. Each female connector 26 has five socket terminals 26a. For example, a control signal line or a power line for driving the CCD 15 or the like is connected to each socket terminal 26a.

  As shown in FIG. 3, inside the camera body 11, a pair of lock members 31, 32 arranged facing each other so as to sandwich the body-side mount 20, and these lock members are slid in the left-right direction. A clamping / fixing part (clamping / fixing means) 30 including the moving mechanism 33 is provided. Each lock member 31, 32 is formed in a substantially flat plate shape. Each lock member 31, 32 has trapezoidal cutouts 31 a, 32 a that match the shape of the first outer diameter portion 24. Furthermore, each of the lock members 31 and 32 has a first outer shape that forms a groove between the rear surface of the barrel 13 and the second outer diameter portion 25 when the lens side mount 22 is inserted into the main body side mount 20. The thickness and the position are adjusted so as to sandwich the diameter portion 24.

  The moving mechanism 33 has a release position (see FIG. 3A) that allows the lens-side mount 22 to be inserted / removed in response to an operation input from the user, and a clamping position that clamps and fixes the inserted lens-side mount 22 (see FIG. 3A). Each lock member 31 and 32 is moved between FIG.3 (b). The lock members 31 and 32 that have moved to the clamping position are notched to the side surfaces 24a (see FIG. 2) of the first outer diameter portion 24 that are inclined by about 45 degrees with respect to the clamping direction (left-right direction) by the moving mechanism 33. The lens side mount 22 is clamped and fixed by contacting the inclined surfaces of 32a and 32a, and the lens side mount 22 is reliably prevented from coming off by entering between the back surface of the lens barrel 13 and the second outer diameter portion 25. Thereby, the lens unit 12 is mechanically held by the camera body 11. The moving mechanism 33 may be one that moves each lock member 31, 32 in conjunction with a manual operation such as a slide lever, or one that automatically moves each lock member 31, 32 by driving a motor or the like. Good.

  The lock members 31 and 32 are formed with male connectors 34 and 35 corresponding to the female connectors 26, respectively. The male connectors 34 and 35 are fitted to the female connectors 26 when the lock members 31 and 32 are moved to the clamping positions and the lens side mount 22 is clamped and fixed, so that the camera body 11 and the lens unit 12 are connected. Connect electrically.

  The male connector 34 has five pin terminals: a negative pin terminal 34a, a positive pin terminal 34b, control signal pin terminals 34c and 34d, and a detection pin terminal 34e. The male connector 35 is configured in the same manner as the male connector 34. The pin assignment of each female connector 26 is naturally configured according to each male connector 34, 35. As a result, power is supplied from the camera body 11 to the lens unit 12 via each negative pin terminal 34a, 35a and each positive pin terminal 34b, 35b, and each control signal pin terminal 34c, 34d, Various commands, acquired image data, and the like are sent and received between the camera body 11 and the lens unit 12 via 35c and 35d.

  Each detection pin terminal 34e, 35e is connected to an input / output terminal of a CPU (not shown) provided in the camera body 11, for example. For example, when the detection pin terminals 34e and 35e are connected to the socket terminals 26a of the respective female connectors 26, the CPU switches the voltage of the input / output terminals from Hi to Lo or Lo to Hi (so-called pull-down, (Pull-up circuit) to detect that the lens unit 12 is attached to the camera body 11.

  Also, the pin terminals 34a to 34e and 35a to 35e are, respectively, negative electrode pin terminals 34a and 35a, positive electrode pin terminals 34b and 35b, control signal pin terminals 34c, 34d, 35c and 35d, and detection pins. The length is changed so as to be shorter in the order of the terminals 34e and 35e. Thereby, each pin terminal 34a-34e, 35a-35e is connected to each female connector 26 from each negative pin terminal 34a, 35a, when each lock member 31, 32 moves to a clamping position from a release position, Finally, the detection pin terminals 34e and 35e are connected.

  Next, the operation of the camera system 10 having the above configuration will be described. When attaching the lens unit 12 to the camera body 11, first, the lens side mount 22 is inserted into the body side mount 20 with the lock members 31 and 32 being in the release positions. At this time, since the outer diameter of the second outer diameter portion 25 of the lens side mount 22 is slightly smaller than the inner diameter of the main body side mount 20, the lens side mount 22 can be easily inserted and removed. Moreover, since the friction etc. which arise at the time of insertion / extraction are suppressed, durability of each mount 20 and 22 can also be improved.

  After the lens side mount 22 is inserted into the main body side mount 20, when the movement mechanism 33 is driven to move the lock members 31 and 32 from the release position to the clamping position, the lens side mount 22 is moved by the lock members 31 and 32. The lens unit 12 is mechanically held by the camera body 11 by being clamped and fixed (see FIG. 3B).

  The lock members 31 and 32 moved to the holding position bring the inclined surfaces of the notches 31a and 32a inclined about 45 degrees with respect to the holding direction by the moving mechanism 33 into contact with the side surfaces 24a of the lens side mount 22. The lens unit 12 in which the inclined surfaces of the notches 31a and 32a are in contact with the side surfaces 24a is arranged along the inclination of the surfaces while the lock members 31 and 32 are completely moved to the clamping position. Each inclined surface of 31a and 32a and each side surface 24a move to a close position.

  Thereby, the position of the lens unit 12 in the vertical and horizontal directions is accurately determined. In addition, since the rotation of the photographing lens 14 around the optical axis is restricted, displacement of the rotation position of the lens unit 12 is also reliably prevented. The lock members 31 and 32 moved to the clamping position enter between the back surface of the lens barrel 13 and the second outer diameter portion 25 to reliably prevent the lens side mount 22 from coming off. In this example, the first outer diameter portion 24 having a reduced outer diameter is used as the engagement groove according to the claims. However, the engagement groove is not limited to the above, and a lens such as a part of the side surface is recessed. Any shape may be used as long as it is related to the insertion / extraction direction of the unit 12.

  When the lock members 31 and 32 move to the clamping position, the female connectors 26 and the male connectors 34 and 35 are fitted, and the camera body 11 and the lens unit 12 are electrically connected. As described above, the camera main body 11 and the lens unit 12 are mechanically and electrically connected to each other via the mounts 20 and 22, so that the camera system 10 is ready for photographing.

  When the male connectors 34 and 35 are fitted to the female connectors 26, they are connected from the longest negative electrode pin terminals 34a and 35a. By connecting the negative electrode (so-called ground) of the power source first in this way, a surge current due to static electricity flows through each terminal to prevent the camera body 11 and the internal circuit of the lens unit 12 from being damaged. can do.

  Then, following each negative pin terminal 34a, 35a, each positive pin terminal 34b, 35b, each control signal pin terminal 34c, 34d, 35c, 35d are connected, and finally each shortest detection pin terminal 34e. , 35e are connected. In this way, by connecting the detection pin terminals 34e and 35e last, the attachment of the lens unit 12 is detected by the camera body 11 only when the other terminals are normally connected. In addition, when an excessive force is applied to the lens unit 12 attached to the camera body 11 and the connection state of each terminal is disconnected, the detection pin terminals 34e and 35e are opposite to the connection. Therefore, it is possible to reliably detect the disconnection. It should be noted that when the detection pin terminals 34e and 35e are disconnected against the user's intention, the power to the lens unit 12 stops communication of the control signal between the camera body 11 and the lens unit 12. It is preferable to perform control such as stopping the supply or notifying the user of a warning.

  Further, in this example, since only the lens side mount 22 is inserted into the main body side mount 20, the camera main body 11 is not increased in size. Furthermore, since the lens unit 12 can be easily attached and detached simply by driving the moving mechanism 33 and moving the lock members 31 and 32 between the clamping position and the release position, the operability is reduced. There is nothing.

  In the above embodiment, the lens-side mount 22 is formed in a regular octagonal column shape, and the trapezoidal cutouts 31 a and 32 a formed in the lock members 31 and 32 are brought into contact with the shape of the lens-side mount 22. However, these shapes are not limited to the above. For example, as shown in FIG. 4, the lens side mount 40 is formed in a substantially square octagonal column shape, and a lock member 41 having a trapezoidal cutout 41 a formed in accordance with the shape of the lens side mount 40. Further, clamping and fixing may be performed with the lock member 42 having the trapezoidal protrusion 42a. Furthermore, an inclined surface may be formed on only one of the lock members 46 and 47, such as the lens side mount 45 and the lock members 46 and 47 shown in FIG.

  Even in the lens-side mounts 40 and 45 and the lock members 41, 42, 46, and 47 configured as described above, the vertical and horizontal positions are determined by the inclined surfaces, and the rotation around the optical axis is restricted. Therefore, the same effect as the above embodiment can be obtained. As shown in FIGS. 4 and 5, the shape of the main body side mount 20 may be different from the lens side mount as long as the lens side mount can be inserted and removed.

  In addition, the regular octagonal prism-shaped lens side mount 22 as shown in FIGS. 1 to 3 can be inserted into the main body side mount 20 even when it is rotated 90 degrees or 180 degrees around the optical axis. It is feared that 12 will be attached. On the other hand, as shown in FIGS. 4 and 5, if the shape is asymmetrical vertically or horizontally, the insertion direction of the lens-side mount is uniquely determined, so that the lens unit 12 is attached in the wrong direction. Can be reliably prevented.

  In each of the above embodiments, the lens side mount is formed in a prism shape, and each side surface of the prism is a reference plane parallel to the optical axis. However, the shape of the lens side mount is not limited to a prism. For example, as in the lens side mount 50 shown in FIG. 6, a shape (so-called D cut) in which a side surface of a cylinder is cut to form a reference plane may be used. Further, the lock members 51 and 52 shown in FIG. 6 have substantially arc-shaped cutouts 51 a and 52 a formed in accordance with the shape of the lens side mount 50. Since the lens-side mount 50 and the lock members 51 and 52 configured in this way also perform positioning in the vertical and horizontal directions and restriction of rotation around the optical axis by contact with the reference plane, The same effect as the form can be obtained.

  Further, in each of the above embodiments, notches and overhangs are formed as contact portions according to the claims in each lock member, and these and the reference plane are brought into contact with each other, but not limited thereto, For example, like the lock members 55 and 56 shown in FIG. 7, projections 55a and 56a having a semicircular tip shape are formed as contact portions, and the projections 55a and 56a are brought into contact with the respective reference planes at points. You may do it.

  The moving mechanism 33 in each of the above embodiments has the lock members 31 and 32 between a release position that enables insertion and removal of the lens side mount 22 and a clamping position that clamps and fixes the inserted lens side mount 22. However, as shown in FIG. 8, when the lens side mount 22 is not inserted, the lock members 31 and 32 are moved to a closed position where the body side mount 20 is closed and protected. You may do it. The main body side mount 20 is formed with a gap for slidingly moving the lock members 31 and 32. For this reason, for example, if the camera body 11 is stored without attaching the lens unit 12 while the lock members 31 and 32 are in the release position, dust or the like may enter the camera body 11 from the gap. is there. On the other hand, if the lock members 31 and 32 are moved to the closed position, the gaps are filled with the lock members 31 and 32, so that dust or the like enters the camera body 11 from the gaps during storage. Can be prevented.

  Further, in the example shown in FIG. 8, the main body side mount 20 is exposed by the opening formed by the notches 31a and 32a, and foreign matters such as dust enter the main body side mount 20 from this opening. There is concern. For this reason, when preventing the entry of foreign matter into the main body side mount 20, as in the lock members 60 and 61 shown in FIG. 9, a protrusion 60a is formed on one side and a notch 61a is formed on the other side. Thus, it is preferable that the area of the opening generated in the central portion be as narrow as possible. At this time, the male connectors 34 and 35 may be provided at different locations so that the openings can be completely eliminated.

  Furthermore, the main body side mount 20 may be securely closed by one lock member 66 as in the lock members 65 and 66 shown in FIG. In addition, although the moving mechanism 33 of each said embodiment is trying to slide each lock member to the left-right direction, the direction (clamping direction) to slide is arbitrary directions orthogonal to the optical axis of the imaging lens 14. It's okay. Moreover, although the moving mechanism 33 of each said embodiment is made to move each of a pair of locking member to each position, the moving mechanism 33 may move only one of each locking member. .

  The protection of the main body side mount 20 is not limited to the above. For example, as shown in FIG. 11, the main body side mount 20 is exposed to the closed position (see FIG. 11A) covering the main body side mount 20. A mount cover (lid member) 70 movable between the open position (see FIG. 11B) may be provided on the camera body 11. Of course, the protection by each lock member and the protection by the mount cover 70 may be made compatible.

  Further, in each of the above embodiments, the lens side mount 22 inserted into the main body side mount 20 is clamped and fixed by the clamping and fixing portion 30 including the lock members and the moving mechanism 33. The nipping and fixing is not limited to the above, and may be configured as shown in FIG. 12, for example. The camera body 80 of FIG. 12 includes a first outer case 81 provided with a release button 85 and the like, and a substantially L-shaped second outer case (sliding member) 82 that is slidably attached to the first outer case 81. And have. A main body side mount 86 is provided in the center of the front surface of the camera main body 80, and trapezoidal cutouts 81 a and 82 a that are openings of the main body side mount 86 are formed in the exterior cases 81 and 82.

  The second outer case 82 slidably attached in the lateral direction has a release position (see FIG. 12B) that allows the lens side mount 22 to be inserted and removed by expanding the opening area of the main body side mount 86, and the main body side mount. It moves between the holding position (see FIG. 12C) for narrowing and fixing the lens side mount 22 inserted together with the first exterior case 81 by narrowing the opening area 86.

  Even in the camera body 80 configured in this way, the vertical and horizontal positioning and the restriction of rotation around the optical axis are performed by contact between the notches 81a and 82a and the reference plane. Similar effects can be obtained. Further, the second exterior case 82 moves to a portable position (see FIG. 12A) in which the opening area of the main body side mount 86 is further narrower than the holding position when the lens side mount 22 is not inserted. Therefore, the camera body 80 can be further reduced in size.

  The camera body 80 is provided with a click stop mechanism for holding the second exterior case 82 at each position, or an elastic body that is biased toward the portable position, so that the lens side mount 22 is clamped and fixed. It is preferable not to be easily released. In the example shown in FIG. 12, the second exterior case 82 is shown as a slide member. However, the slide member is not limited to this, and may be slid so as to increase or decrease the opening area of the main body side mount 86. Any shape may be used.

  Furthermore, in each of the above-described embodiments, an example is shown in which the present invention is applied to a camera system 10 including a lens unit 12 including a photographing lens 14 and a CCD 15 and a camera body 11 that detachably holds the lens unit 12. However, the present invention is not limited to this. For example, the present invention may be applied to an interchangeable lens digital camera in which the CCD 15 is provided on the camera body 11 side and only the photographing lens 14 is detachable. Furthermore, the present invention may be applied to an interchangeable lens type silver salt camera that exposes and records a subject image on a photographic film, without being limited to a digital camera.

It is a perspective view which shows the structure of a camera system roughly. It is a perspective view which shows the structure of a lens side mount roughly. It is explanatory drawing which shows the structure of a clamping fixing | fixed part roughly. It is explanatory drawing which shows the example which made the lens side mount the substantially square shape. It is explanatory drawing which shows the example which provided the inclined surface only in one side of each lock member. It is explanatory drawing which shows the example which made the lens side mount D-cut type. It is explanatory drawing which shows the example which contacts a reference plane with a point. It is explanatory drawing which shows the example which moves each lock member to a closed position. It is explanatory drawing which shows the example which narrowed the opening area produced when moving each lock member to a closed position. It is explanatory drawing which shows the example which plugs the main body side mount on one side of each lock member. It is explanatory drawing which shows the example which provided the mount cover in the camera main body. It is explanatory drawing which shows the example which clamps and fixes a lens side mount with a slide member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Camera system 11, 80 Camera main body 12 Lens unit 13 Lens tube 14 Shooting lens 15 CCD (imaging device)
20 Body side mount 22 Lens side mount 24 First outer diameter part (engagement groove)
24a Side (reference plane)
25 Second outer diameter portion 26 Female connector 30 Nipping and fixing portion (Nipping fixing means)
31, 32 Lock member 31a, 32a Notch (contact part)
33 Moving mechanism 34, 35 Male connector 34a, 35a Negative pin terminal 34e, 35e Detection pin terminal 70 Mount cover (lid member)
81 1st exterior case 82 2nd exterior case (sliding member)
81a, 82a Notch (contact part)

Claims (12)

In a camera system comprising a lens unit having a lens barrel provided with a photographing lens on the front surface and a camera body that detachably holds the lens unit,
The lens unit is formed on at least a part of a side surface of the lens side mount so as to be substantially parallel to the optical axis of the photographing lens, and a substantially columnar lens side mount projecting on the rear surface of the lens barrel. A reference plane,
The camera body includes a substantially hole-shaped body-side mount into which the lens-side mount is inserted and removed, and the lens-side mount inserted into the body-side mount so as to be in contact with the reference plane and fixed. And a camera system.   The clamping / fixing means releases a clamping position and a clamping between a pair of locking members disposed so as to sandwich the body-side mount and the lens-side mount inserted into the body-side mount. A moving mechanism that moves at least one of the lock members between a release position that enables insertion and removal of the lens-side mount, and a flat shape, a convex shape, or a concave shape according to the shape of the lens-side mount 2. The camera system according to claim 1, further comprising a contact portion provided on at least one of the lock members so as to come into contact with the reference plane when moved to the clamping position.   The moving mechanism moves at least one of the lock members to the holding position and the release position, and moves the lock member to a closed position that closes the body-side mount when the lens-side mount is not inserted. The camera system according to claim 2.   The clamping and fixing means is slidably attached to the exterior case of the camera body, and the lens side mount inserted into the body side mount is clamped and fixed together with the exterior case to release the clamping position and the lens side. A slide member that moves between a release position that enables insertion and removal of the mount, and is formed in either a flat shape, a convex shape, or a concave shape according to the shape of the lens side mount, and has moved to the clamping position The camera system according to claim 1, further comprising a contact portion provided on at least one of the exterior case and the slide member so as to come into contact with the reference plane. The lens side mount is formed in a substantially regular octagonal prism shape,
5. The lens clamping device according to claim 1, wherein the lens clamping unit clamps and fixes the lens side mount with the side surface of the lens side mount inclined at about 45 degrees with respect to the clamping direction as the reference plane. 6. The camera system described in.   6. The camera system according to claim 5, wherein the contact portion is a substantially trapezoidal cutout formed in accordance with the shape of the lens side mount. The camera body and the lens unit have a male connector provided on one of the main body side mount and the lens side mount, and a female connector provided on the other side,
The male connector and the female connector are engaged when the clamping and fixing means clamps and fixes the lens side mount, and electrically connects the camera body and the lens unit. Item 7. The camera system according to any one of Items 1 to 6.   The male connector detects a pin terminal for a positive electrode of a power source supplied from the camera body to the lens unit, a pin terminal for a negative electrode of the power source, and whether the lens unit is attached to the camera body. The detection pin terminal used at the time, the negative electrode pin terminal is the longest, and the detection pin terminal is the shortest. Camera system.   The camera body includes a lid member that is movable between a position that covers the body-side mount and a position that exposes the body-side mount when the lens-side mount is not inserted. The camera system according to any one of claims 1 to 8.   10. The engagement groove according to claim 1, wherein an engagement groove into which a part of the clamping and fixing means enters when the lens side mount is clamped and fixed is provided on a side surface of the lens side mount. Camera system.   11. The image pickup device according to claim 1, wherein the lens unit is provided with an image sensor that photoelectrically converts a subject image formed by the photographing lens to acquire image data corresponding to the subject image. The camera system according to claim 1. A lens barrel provided with a photographing lens on the front surface, a substantially columnar lens-side mount projecting on the rear surface of the lens barrel, and a side surface of the lens-side mount so as to be substantially parallel to the optical axis of the photographing lens. In a camera that detachably holds a lens unit having a reference plane formed at least in part,
A substantially hole-shaped body-side mount into which the lens-side mount is inserted and removed;
A camera comprising: a pinching / fixing means for pinching and fixing the lens side mount inserted into the main body side mount so as to be in contact with the reference plane.

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