JPH0739040U - Interchangeable lens camera - Google Patents

Abstract

(57) [Summary] [Purpose] Even if at least one of the lens-side mount portion and the body-side mount portion that come into contact with the lens-side mount mounted on the body-side mount is formed of an insulating member, a new dedicated relay is provided. Provided is a lens-interchangeable camera that can connect a lens barrel and a grounding terminal of each wiring board of a camera body without providing a terminal. [Structure] With the lens side mount 505 attached to the body side mount 3 of the camera body 1, the engagement pin 7 of the body side mount 3 is engaged with the engagement hole 9 of the lens side mount 505.
In the lens interchangeable type camera that engages with, the grounding terminal 113 of the flexible substrate 111 arranged in the camera body 1 is connected to the support plate 1303 and the coil spring 130.
5, the grounding terminal 5 of the flexible substrate 519 is connected to the engagement pin 7 via the connection pin 5, and at a position in the lens barrel 5 where the engagement pin 7 is engaged with the engagement hole 9 and comes into contact with the tip thereof.
21 was placed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an interchangeable lens type camera in which a lens barrel can be detachably attached.

[0002]

[Prior art]

 Generally, most single-lens reflex cameras have an interchangeable lens type in which the lens barrel, that is, the lens unit can be exchanged for another lens unit having a different focal length range and angle of view. The lens side mount is detachably attached to the body side mount provided on the front surface of the camera body. Further, in the above-mentioned interchangeable lens type camera, the lens side mount and the body side mount are respectively provided with relay terminals for signal transmission which come into contact with each other when the lens side mount is mounted on the body side mount. The signal input / output terminals of the wiring board disposed inside the lens barrel or the camera body are electrically connected to each other via the relay terminals.

Further, the lens-side mount and the body-side mount are respectively provided with metal ring-shaped members in order to prevent wear and the like caused by their attachment / detachment. Conventionally, wiring of the lens barrel has been used. In order to ground the board, the lens barrel and the grounding terminal of each wiring board of the camera body were connected via both ring-shaped members of the lens side mount and the body side mount.

[0004]

[Problems to be solved by the device]

 However, in recent years, in order to reduce the weight of the camera and reduce the cost, the ring-shaped members of the lens side mount and the body side mount are often formed of synthetic resin. Since it is not possible to connect the lens barrel and the grounding terminals of each wiring board of the camera body through the member, a new relay terminal must be provided for the connection between the grounding terminals of both wiring boards. However, there was a problem that the number of parts increased and the configuration became complicated.

By the way, in the lens interchangeable type camera described above, in order to hold the lens side mount mounted on the body side mount, a pin protruding from the body side mount and a lens mirror are conventionally used. A holding mechanism including an engagement hole formed in the lens side mount is provided so that the pin can be engaged with the cylinder mounted.

In view of the above circumstances, the present invention has been made by paying attention to the holding mechanism, and an object of the present invention is to mount the lens side mount on the body side mount and to contact the lens side mount portions with each other. Even if at least one of the mount part and the body side mount part is made of an insulating material such as synthetic resin, the lens barrel and the grounding terminal of each wiring board of the camera body can be connected without providing a new dedicated relay terminal. The objective is to provide a lens interchangeable camera that can be connected to.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a body side mount provided on the front surface of a camera body, a lens barrel having a lens side mount detachably attached to the body side mount, and a lens barrel inside the camera body and The body-side wiring board and the lens-side wiring board, which are respectively arranged in the lens barrel, the engaging protrusion protruding from the body-side mount, and the lens-side mount, are provided on the lens-side mount. A lens-interchangeable camera having an engaging recess that engages with the engaging protrusion when mounted on a side mount, and at least one of the body-side mount and the lens-side mount is made of an insulating member, The engaging convex portion is formed of a conductive member, and the grounding terminal of the body side wiring board and the engaging convex portion are electrically connected, and the lens side wiring board is formed. The ground terminal, characterized by being disposed in contact with available-to the engagement projection engaged with the engaging recess.

Further, according to the present invention, the engaging convex portion is disposed so as to be retractable from the body side mount, and further, the biasing member biases the engaging convex portion in a direction projecting from the body side mount. Is provided. Further, according to the present invention, the engaging convex portion supports the engaging pin disposed on the body side mount so as to be retractable, and the base side of the engaging pin, and is capable of sliding in the protruding and retracting direction of the engaging pin. And a conductive support member connected to the camera body side and electrically connected to the grounding terminal of the body side wiring board. Further, in the present invention, the biasing member is formed of a conductive member, and the grounding terminal of the body side wiring board and the supporting member are electrically connected via the biasing member. Further, according to the present invention, an operating means for retracting the engaging convex portion is further provided.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an interchangeable lens type camera according to an embodiment of the present invention. In the drawings, 1 is a camera body, 3 is a body side mount provided on the front surface 101 of the camera body 1, and 5 is a lens barrel having a lens side mount 505 that is detachably mounted on the body side mount 3. , The body side mount 3 and the lens side mount 505 are engaged with the engagement pin 7 (corresponding to an engagement convex portion) and the engagement hole 9 (which are engaged with each other when the lens side mount 505 is mounted on the body side mount 3). 11 corresponds to the engaging recesses, and in FIG. 11, reference numeral 11 denotes an engagement releasing button (indicated by an operating means) for retracting the engaging pin 7 and releasing the engagement between the engaging pin 7 and the engaging hole 9. Equivalent).

On the upper surface 103 of the camera body 1, a main switch 105, a release button 107, an LCD display 109 for displaying the operation state of the camera, and the like are arranged. Further, inside the camera body 1, As shown in the sectional plan view of FIG. 2, a flexible substrate 111 (corresponding to a body side wiring substrate) is extended along the front surface 101, and a portion of the flexible substrate 111 facing the engagement release button 11 is As shown in the perspective view of the main part in FIG. 3, a grounding terminal 113 is formed.

The body side mount 3 is made of, for example, an insulating member such as synthetic resin, and as shown in FIG. 1, is formed of an annular front surface portion 301 and an inner peripheral surface portion 303. An opening 305 is formed inside the body side mount 3. A plurality of relay terminals 307 for signal transmission are arranged side by side on the front surface portion 301 in the circumferential direction of the opening 305, and a coupler 309 for driving a focus lens is retractable and rotatable on the front surface portion 301. The coupler 309 is arranged so that the engagement pin 7 can be retracted and retracted, and the coupler 309 is removed from the camera body 1 by an AF drive mechanism (not shown) provided in the camera body 1. It is urged in the protruding direction and driven to rotate.

Further, a swing lever 311 for driving the diaphragm is arranged at a position inside the camera body 1 in the vicinity of the opening 305 so as to extend into the opening 305 and swing in the circumferential direction of the opening 305. The swing lever 311 is rocked by, for example, a motor (not shown) arranged in the camera body 1.

The lens barrel 5 includes a focus lens, a focus lens moving mechanism that moves the focus lens in the axial direction, a diaphragm, and a diaphragm driving mechanism that opens and closes the diaphragm, and manually drives the focus lens. A focus ring 501 that is rotated when the aperture is operated, an aperture ring 503 that is rotated when manually adjusting the aperture, and the like are provided.

The lens-side mount 505 is formed at the end of the lens barrel 5 with an insulating member such as synthetic resin. The lens-side mount 505 has an annular outer peripheral surface portion 507 and an inner end surface portion 509. And the outer end surface portion 511, and the lens side mount 505 is mounted in the opening 305 of the body side mount 3. The inner end surface portion 509 is provided with a diaphragm lever 513 for automatic diaphragm driving, which is connected to the diaphragm driving mechanism and slides according to opening and closing of the diaphragm. The diaphragm lever 513 is a biasing mechanism (not shown). Is urged in the direction of swinging upward in the figure. A plurality of relay terminals 515 for signal transmission corresponding to the relay terminals 307 are arranged side by side in the circumferential direction of the outer peripheral surface portion 507, and are connected to the focus lens moving mechanism. A coupler 517 that rotates according to the movement of the focus lens is provided corresponding to the coupler 309, and the engaging hole 9 is further provided.

Inside the lens barrel 5, as shown in FIG. 2, a flexible substrate 519 (corresponding to a lens side wiring substrate) is extended along the outer end surface portion 511, and the flexible substrate 519 is A grounding terminal 521 is formed at a portion facing the engaging hole 9, as shown in a perspective view of a main part in FIG.

The engagement pin 7 is inserted into a hole 313 penetrating the front surface portion 301 of the body side mount 3, and is supported by the support mechanism 13 so as to be retractable from the front surface portion 301. The engagement pin 7 is formed of a conductive material such as metal, and the tip thereof is inserted through the hole 313 and the engagement hole 9 with the lens side mount 505 mounted on the body side mount 3. It is formed with a length that allows it to come into contact with the grounding terminal 521 of 519.

As shown in FIGS. 2 and 3, the support mechanism 13 includes a guide pin 1301, a support plate 1303 (corresponding to a support member) formed of a conductive member such as metal, and a coil spring 1305 (biasing force). (Corresponding to a member) and. The base end of the guide pin 1301 is connected to the grounding terminal 113 of the flexible board 111 and holes 115 and 119 penetrating the supporting piece 117 extending from the camera body 1 side and supporting the flexible board 111. The guide pin 1301 is inserted and is supported by these holes 115 and 119 so as to be slidable in the protruding and retracting direction of the engaging pin 7. The guide pin 1301 may be formed of either a conductive member or an insulating member.

In addition, the support plate 1303 includes a front piece portion 1307 facing the hole 313 of the front surface portion 301, a rear piece portion 1309 facing the grounding terminal 113 of the flexible substrate 111, and these front piece portions 1307. The rear end portion 1309 is connected to the connecting piece portion 1311. The front end of the front end portion 1307 is attached with the base end of the engaging pin 7, and the rear end portion 1309 is attached to the rear surface of the guide pin 1301. Is attached, and the engagement release button 11 is attached to the front surface of the rear piece portion 1309. The engagement release button 11 is formed on the front surface 101 in the vicinity of the body side mount 3. It projects from the hole 121 to the outside of the camera body 1.

Further, the coil spring 1305 is wound around the guide pin 1301, and both ends of the coil spring 1305 are elastically contacted with the grounding terminal 113 of the flexible board 111 and the rear piece 1309, respectively. The support plate 1303 is urged by the 305 in a direction in which the engagement pin 7 is projected from the front surface portion 301, and the front piece portion 1307 is brought into contact with the body side mount 3 to cause the engagement. The upper limit position of protrusion of the pin 7 is restricted. The coupler 309 is retracted and housed in the camera body 1 when the engagement release button 11 is pressed and the AF drive mechanism operates in conjunction with this.

Next, the operation will be described. The lens side mount 505 is mounted on the body side mount 3 by inserting the outer peripheral surface portion 507 and the inner end surface portion 509 of the lens side mount 505 into the opening 305 of the body side mount 3 and The outer end surface portion 511 of the lens side mount 505 is brought into contact with 301 to immerse the coupler 309 and the engagement pin 7 in the camera body 1, and in this state, the lens barrel 5 is moved in the circumferential direction of the opening 305. It is performed by rotating a predetermined amount. Then, in a state where the lens side mount 505 is mounted on the body side mount 3, the engagement pin 7 faces the engagement hole 9, projects from the camera body 1, and engages with the engagement hole 9. Due to this engagement, the rotation of the lens barrel 5 in the circumferential direction is restricted, and the lens side mount 505 is held in a state of being attached to the body side mount 3.

Further, when the lens side mount 505 is mounted on the body side mount 3, each relay terminal 307 of the body side mount 3 is in contact with each relay terminal 515 of the lens side mount 505, and The swing lever 311 of the body side mount 3 engages with the diaphragm lever 513 of the lens side mount 505, and the coupler 309 of the body side mount 3 projects and engages with the coupler 517 of the lens side mount 505.

When the relay terminals 307 and 515 come into contact with each other, the signal input / output terminals of the flexible substrates 111 and 519 are electrically connected to each other, and signals such as focus position information of the focus lens are transferred to The flexible boards 111 and 519 are ready for transmission between the signal input / output terminals. Further, by engaging the swing lever 311 and the aperture lever 513, the power of the motor is transmitted to the aperture, and the aperture can be opened and closed from the camera body 1 side. Further, by engaging the couplers 309 and 517, the dynamic force of the AF driving mechanism is transmitted to the focus lens, and the focus position of the focus lens can be changed from the camera body 1 side.

Further, when the engagement pin 7 engages with the engagement hole 9, the tip of the engagement pin 7 comes into contact with the grounding terminal 521 of the flexible substrate 519, and the engagement pin 7, Since the support plate 1303 and the coil spring 1305 are each formed of a conductive member, the engagement pin 7 and the support plate are provided between the grounding terminals 113 and 521 of the flexible board 111 and the flexible board 519. The flexible substrate 519 is electrically connected via the coil spring 1305 and the coil spring 1305 so that the flexible substrate 519 can be grounded to the camera body 1 side.

The lens side mount 505 is detached from the body side mount 3 by pressing the engagement release button 11 to retract the engagement pin 7 and the coupler 309 into the camera body 1 and The engagement with the engagement hole 9 and the coupler 517 is released, and in that state, the lens barrel 5 is rotated in the opposite direction to the above-mentioned operation, and the outer peripheral surface portion 507 and the inner end surface of the lens side mount 505 are rotated. This is performed by pulling out the portion 509 from the opening 305 of the body side mount 3.

As described above, according to the present embodiment, with the lens side mount 505 attached to the body side mount 3 of the front surface 101 of the camera body 1, the engagement pin 7 of the body side mount 3 is In the lens interchangeable camera that engages with the engagement hole 9 of the side mount 505, the grounding terminal 113 of the flexible substrate 111 arranged in the camera body 1 is connected via the support plate 1303 and the coil spring 1305. A grounding terminal 521 of the flexible substrate 519 is provided at a position inside the lens barrel 5 which is brought into conduction with the mating pin 7 and which is in contact with the tip of the engaging pin 7 in the state of being engaged with the engaging hole 9. I placed it. Therefore, when mounting the lens side mount 505 to the body side mount 3, the grounding terminal 521 of the flexible substrate 519 is grounded to the ground of the flexible substrate 111 without providing a dedicated connection terminal to the body side mount 3 or the lens side mount 505. The flexible board 519 can be grounded to the camera body 1 side by connecting to the terminal 113 for use, and the increase in the number of parts can be prevented, and the configuration can be prevented from becoming complicated and the cost can be prevented from increasing.

In this embodiment, the engaging pin 7 and the engaging hole 9 are provided on the front surface portion 301 of the body side mount 3 and the outer end surface portion 511 of the lens side mount 505, respectively. 3 may be provided on the inner peripheral surface portion of the lens mount 505 or on the outer peripheral surface portion of the lens side mount 505. Further, in the present embodiment, the engagement pin 7, the engagement release button 11, and the support mechanism 13 are provided on the body side mount 3 side, respectively, and the engagement hole 9 is provided on the lens side mount 505 side. 7, the engagement release button 11, and the support mechanism 13 may be provided on the lens side mount 505 side, and the engagement hole 9 may be provided on the body side mount 3 side. Further, in this embodiment, the engagement pin 7 is electrically connected to the grounding terminal 521 of the flexible substrate 519 via the support plate 1303 and the coil spring 1305. The electrical connection means between the mating pin 7 and the flexible substrate 519 may be separately configured.

Further, in the present embodiment, the case where the body side mount 3 and the lens side mount 505 are respectively formed of insulating members such as synthetic resin has been described. It is also applicable to a lens interchangeable camera in which only one of the lens side mounts 505 is formed of an insulating member. Further, in this embodiment, the outer peripheral surface portion 507 and the inner end surface portion 509 of the lens side mount 505 are inserted into the opening 305 of the body side mount 3 and the lens barrel 5 is rotated, so that the lens side mount 505 is mounted on the body side. The lens interchangeable camera mounted on the side mount 3 has been described, but in the present invention, for example, the lens side mount is applied to the body side mount, and the tightening ring of the lens side mount is attached to the male screw on the outer peripheral surface of the body side mount. It is needless to say that the lens side mount can be applied to a lens interchangeable camera or the like mounted on the body side mount by screwing the lens side mount.

[0028]

[Effect of device]

 As described above, according to the present invention, the body mount provided on the front surface of the camera body, the lens barrel having the lens mount detachably attached to the body mount, and the inside of the camera body And a body-side wiring board and a lens-side wiring board respectively disposed in the lens barrel, an engaging protrusion protruding from the body-side mount, and the lens-side mount. A lens-interchangeable camera comprising: an engaging concave portion that engages with the engaging convex portion when mounted on the body-side mount, wherein at least one of the body-side mount and the lens-side mount is made of an insulating member. The engaging convex portion is formed of a conductive member, and the grounding terminal of the body side wiring board and the engaging convex portion are electrically connected to each other to connect the lens side wiring board. Since the terminal for use is arranged so as to be able to come into contact with the engaging convex portion that is engaged with the engaging concave portion, the lens side mount portion and the body side mount that are in contact with each other when the lens side mount is mounted on the body side mount Even if at least one of the parts is made of insulating material such as synthetic resin, connect the lens barrel to the grounding terminal of each wiring board of the camera body without providing a new dedicated relay terminal. You can

[Brief description of drawings]

FIG. 1 is a perspective view of an interchangeable lens type camera according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional plan view of a body side mount and a lens side mount portion of the lens interchangeable camera of FIG.

FIG. 3 is a perspective view showing an arrangement of grounding terminal portions of a flexible substrate provided on the body side mount and the lens side mount of FIG. 1, respectively.

[Explanation of symbols]

 1 camera body 101 front side of camera body 111 flexible board (body side wiring board) 113 grounding terminal 3 body side mount 5 lens barrel 505 lens side mount 519 flexible board (body side wiring board) 521 grounding terminal 7 engagement pin ( Engagement convex portion 9 Engagement hole (engagement concave portion) 11 Engagement release button (operating means) 1303 Support plate (supporting member) 1305 Coil spring (biasing member)

Claims (5)

[Scope of utility model registration request] 1. A lens barrel having a body-side mount provided on the front surface of a camera body, a lens-side mount detachably attached to the body-side mount, and inside the camera body and inside the lens barrel. A state in which the body side wiring board and the lens side wiring board are respectively arranged, the engaging projections that project from the body side mount, and the lens side mount is mounted on the body side mount. In the lens interchangeable camera, wherein the engaging convex portion is engaged with the engaging concave portion, and at least one of the body side mount and the lens side mount is made of an insulating member, And electrically connecting the grounding terminal of the body side wiring board and the engaging convex portion, the grounding terminal of the lens side wiring board is It was arranged to be in contact with the engagement projection engaged with the recess, the lens-interchangeable camera, characterized in that. 2. The engaging protrusion is disposed in the body-side mount so as to be retractable and retractable, and a biasing member that biases the engaging protrusion in a direction projecting from the body-side mount is provided. The interchangeable lens type camera according to claim 1. 3. The engaging protrusion is provided on the body-side mount so as to be retractable, and the engaging pin supports the base side of the engaging pin and is slidable in the retracting direction of the engaging pin. 3. The interchangeable lens type camera according to claim 2, wherein the interchangeable lens is formed of a conductive support member that is coupled to the camera body side and is electrically connected to a grounding terminal of the body side wiring board. 4. The interchangeable lens type camera according to claim 3, wherein the urging member is formed of a conductive member, and the grounding terminal of the body side wiring board and the supporting member are electrically connected via the urging member. . 5. The lens-interchangeable camera according to claim 1, further comprising operating means for projecting and retracting the engaging convex portion.