JP2019035974A - Camera body - Google Patents

Abstract

To enable a camera body to be reduced in size.SOLUTION: A camera body 200 is one in which an accessory is removably mounted, comprising: a body-side mount unit 220 provided on the outer circumferential side of an opening 210 provided at a front 201 of a case 250 of the camera body, with an accessory removably mounted therein; a holding unit 230 projecting in a cylindrical form at the front 201 of the camera body 200 and having a first groove 270 provided so as to follow the outer circumference of a barrel wall; and a first O-ring 240 held in the first groove 270 of the holding unit 230. The holding unit 230 is provided on the outer circumferential side of the body-side mount unit 220, and when an accessory is mounted in the body-side mount unit 220, the first O-ring 240 is compressed from the farther outer circumferential side than the holding unit 230 by the accessory.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a camera body.

  2. Description of the Related Art In a lens interchangeable waterproof camera system in which an interchangeable lens is detachably attached to a camera body, a camera system is known in which a groove is provided along the outer periphery of the interchangeable lens and an O-ring is held by the groove (Patent Document). 1).

JP-A-6-294994

  In the configuration as described in Patent Document 1, since the O-ring is exposed to the outside in a state where the interchangeable lens is not attached to the camera body, the waterproof performance may be deteriorated.

  A camera body according to an aspect of the present invention is a camera body to which an interchangeable lens is detachably attached, a main body having an opening, and a protrusion provided in the main body that surrounds the opening. A mount portion provided on the projecting portion to which the interchangeable lens is mounted; a groove portion provided on an outer periphery of the projecting portion; an O-ring retained in the groove portion; and the O-ring retained in the groove portion. A protective cover for covering.

  According to the present invention, the camera body can be reduced in size.

1 is a schematic front view of a camera body according to an embodiment of the present invention. It is sectional drawing of the camera body by one embodiment of this invention. (A) It is sectional drawing of the holding part with which the camera body by one Embodiment of this invention is equipped. (B) It is a figure which shows the state which varied the diameter of the groove bottom of two grooves provided in the holding | maintenance part. (A) It is a side view of the interchangeable lens by one embodiment of this invention. (B) It is a top view of the interchangeable lens by one embodiment of this invention. It is a figure which shows the state by which the interchangeable lens by another aspect of this invention was mounted | worn with the camera body by one embodiment of this invention. (A) It is sectional drawing of the conventional camera body and the conventional interchangeable lens. (B) It is a figure which shows the state by which the interchangeable lens was mounted | worn with the conventional camera body. It is a figure which shows the state by which the conventional interchangeable lens was mounted | worn with the camera body by one embodiment of this invention. It is a figure which shows the state by which the protective cover by another aspect of this invention was mounted | worn with the camera body by one Embodiment of this invention. It is an expanded sectional view of the protective cover with which the camera body was mounted | worn. (A) It is a front view of the protective cover by one embodiment of this invention. (B) It is a rear view of the protective cover by one Embodiment of this invention. It is a perspective view of the protective cover by one embodiment of the present invention. It is a figure which shows the state by which the protective cover by another aspect of this invention was mounted | worn with the camera body by one Embodiment of this invention.

  FIG. 1 is a schematic front view of a camera body according to an embodiment of the present invention. The camera body 200 shown in FIG. 1 is used in an interchangeable lens camera system, and accessories such as an interchangeable lens described later are detachably mounted.

  The camera body 200 has an opening 210 through which a light beam from a subject passes, and a body side mount 220 is provided outside the opening 210. Furthermore, a holding portion 230 is provided outside the body side mount portion 220. The body-side mount part 220 and the holding part 230 are in close contact with each other without a gap. Further, the body-side mount part 220 and the holding part 230 protrude from the front surface 201 of the camera body 200 in the direction perpendicular to the paper surface and have a cylindrical shape. An accessory is detachably attached to the body side mount unit 220. The holding unit 230 holds the first O-ring 240 along the outer periphery thereof. The first O-ring 240 is made of an elastic material such as rubber.

  FIG. 2 is a cross-sectional view of the camera body 200. FIG. 2 schematically shows only the vicinity of the front surface 201 in the AA cross section of the camera body 200. In FIG. 2, the holding unit 230 protrudes from the front surface 201 of the case 250 of the camera body 200. The camera body 200 further includes a support portion 221 that protrudes from the front surface 201 of the case 250 of the camera body 200 while being in close contact with the holding portion 230. The body side mount part 220 is fixed to the tip of the support part 221, and is supported at a position protruding from the front surface 201 of the case 250 of the camera body 200.

  The body side mount part 220 has an attachment surface 222 at its tip, and an accessory is attached to the attachment surface 222. The holding portion 230 is provided such that the tip thereof does not protrude from the mounting surface 222 of the body side mount portion 220. In FIG. 2, the front end of the holding portion 230 is flush with the mounting surface 222 of the body-side mount portion 220.

  A holding portion 230 is fixed to the support portion 221 by a fixing member 260 such as a screw, a bolt, or a rivet. The support part 221 and the holding part 230 are fixed to the case 250 by a fixing member 260 such as a screw, a bolt, or a rivet. In FIG. 2, two fixing members 260 for fixing the support portion 221 and the holding portion 230 and two fixing members 260 for fixing the support portion 221 and the case 250 are illustrated. These are merely examples, and the number, position, and length of the fixing members 260 are not limited as illustrated.

  The holding portion 230 is provided with a first groove portion 270 and a second groove portion 280 on the outer peripheral side. The first groove part 270 and the second groove part 280 are provided around the side wall 231 of the holding part 230 once. A first O-ring 240 is held inside the first groove 270, and a second O-ring 290 is held inside the second groove 280. The second O-ring 290 is made of an elastic material such as rubber. The second O-ring 290 is compressed between the groove bottom of the second groove 280 and the case 250, and is in close contact with the groove bottom of the second groove 280 and the case 250. The compressed second O-ring 290 prevents foreign substances such as water and dust from entering the camera body 200 through the gap 211 between the holding unit 230 and the case 250.

  FIG. 3A is a cross-sectional view of the holding portion 230 of the camera body 200. In FIG. 3A, a virtual first cylinder 300 in contact with the groove bottom of the first groove part 270 of the holding part 230 and a virtual second cylinder 310 in contact with the groove bottom of the second groove part 280 are shown. It is shown in the figure. The first cylinder 300 and the second cylinder 310 are concentric. Further, the diameters of the first cylinder 300 and the second cylinder 310 are equal. That is, the diameter of the groove bottom of the first groove portion 270 and the diameter of the groove bottom of the second groove portion 280 are the same. If the diameter of the groove bottom of the first groove portion 270 and the diameter of the groove bottom of the second groove portion 280 are different, the shape becomes complicated like the holding portion 330 shown in FIG. The thickness t becomes large.

  FIG. 4A is a schematic side view of an interchangeable lens according to an embodiment of the present invention. 4B is a plan view of the interchangeable lens 100 shown in FIG. 4A viewed from the direction indicated by the arrow B. FIG. The interchangeable lens 100 is one type of accessory that is detachably attached to the body-side mount 220 of the camera body 200 shown in FIG.

  The interchangeable lens 100 includes at least one optical system 110 such as a lens. The interchangeable lens 100 includes a lens-side mount unit 140 on a second surface 130 that faces the first surface 120 that is directed to a subject during shooting. The lens side mount part 140 is detachably attached to the body side mount part 220 of the camera body 200 shown in FIG.

  The interchangeable lens 100 has a protruding portion 150 that protrudes in a cylindrical shape from the outside of the lens side mount portion 140, and the protruding portion 150 surrounds the lens side mount portion 140. In other words, in the interchangeable lens 100, the concave portion 160 is formed by the second surface 130 and the projecting portion 150, and the lens side mount portion 140 is provided on the second surface 130 corresponding to the bottom surface of the concave portion 160.

  The interchangeable lens 100 has a clearance of a predetermined distance L between the side surface 170 and the optical system 110, and environmental resistance such as impact resistance is ensured.

  FIG. 5 is a diagram illustrating a configuration example of a camera system according to an embodiment of the present invention. A camera system 1 shown in FIG. 5 includes an interchangeable lens 100 and a camera body 200, and the interchangeable lens 100 is attached to the camera body 200. In FIG. 5, a portion hidden by the concave portion 160 of the interchangeable lens 100 is also indicated by a solid line in order to improve the visibility of the drawing.

  In FIG. 5, a part of the holding portion 230 protruding from the front surface 201 of the case 250 of the camera body 200 and the body side mount portion 220 are housed inside the concave portion 160 of the interchangeable lens 100, and the lens side mount portion 140 is the body side. The side mount 220 is attached.

  The first O-ring 240 held in the first groove part 270 of the camera body 200 is compressed between the inner periphery of the projecting part 150 and the groove bottom of the first groove part 270, and the inner periphery of the projecting part 150. The first groove 270 is in close contact with the groove bottom. By doing so, it is possible to prevent intrusion of foreign matters such as water and dust from the gap between the holding portion 230 of the camera body 200 and the protruding portion 150 of the interchangeable lens 100 into the opening 210.

  FIGS. 6A and 6B are diagrams illustrating a conventional example of a lens interchangeable camera system having waterproofness. 6A and 6B are sectional views of the interchangeable lens 400 and the camera body 500. FIG.

  The interchangeable lens 400 does not include a portion corresponding to the protruding portion 150 of the present embodiment, and the third groove portion 420 holds the third O-ring 410 corresponding to the first O-ring 240 of the present embodiment. This is different from the interchangeable lens 100 of the present embodiment.

  The camera body 500 does not include a portion corresponding to the first groove portion 270 and the first O-ring 240 of the present embodiment, and has a waterproof structure 520 having a protruding portion 510 corresponding to the protruding portion 150 of the present embodiment. Is different from the camera body 200 of the present embodiment. The protruding portion 510 has a cylindrical shape like the protruding portion 150 of the present embodiment.

  Similar to the interchangeable lens 100 of the present embodiment, the conventional interchangeable lens 400 also includes a lens side mount portion 140. The conventional camera body 500 also includes a body-side mount portion 220 as with the camera body 200 of the present embodiment. FIG. 6B shows a state where the lens side mount part 140 of the interchangeable lens 400 is attached to the body side mount part 220 of the camera body 500. In FIG. 6B, the interchangeable lens 400 is inserted inside the protruding portion 510, and the third O-ring 410 is compressed between the groove bottom of the third groove portion 420 and the protruding portion 510. The compressed third O-ring 410 is in close contact with the groove bottom of the third groove 420 and the projecting portion 510, thereby preventing water, dust, and the like from entering the opening 210.

  In such an interchangeable lens 400, if a clearance of a predetermined distance L is to be secured between the side surface 430 of the interchangeable lens 400 and the optical system 110 in order to ensure impact resistance, the groove bottom of the third groove 420 and the optical The system 110 had to be separated by a predetermined distance L or more. Since the interchangeable lens 100 according to the present embodiment shown in FIG. 4 does not include the third groove 420, the interchangeable lens 100 can be reduced by at least the depth of the third groove 420.

  Further, the waterproof structure 520 of the camera body 500 shown in FIG. 6 has a size that allows the interchangeable lens 400 to be inserted inside the protruding portion 510. The waterproof structure of the camera body 200 by the holding unit 230 shown in FIG. 2 is large enough to be inserted inside the protruding portion 150 of the interchangeable lens 100 shown in FIG. Since the interchangeable lens 100 is smaller than the interchangeable lens 400, the waterproof structure of the camera body 200 of the present embodiment is smaller than the waterproof structure of the conventional camera body 500. Therefore, the camera body 200 of the present embodiment can be made smaller than the conventional camera body 500.

  FIG. 7 shows a state where a conventional interchangeable lens 400 is attached to the camera body 200 of the present embodiment. As described above, since the holding portion 230 of the camera body 200 is provided so as not to protrude from the mounting surface 222 of the body-side mount portion 220, the body-side mount portion of the camera body 200 does not interfere with each other. The lens side mount part 140 of the interchangeable lens 400 can be attached to 220.

(Protective cover)
As apparent from FIGS. 2 and 7, when the interchangeable lens 100 is not attached to the camera body 200, or when the conventional interchangeable lens 400 is attached to the camera body 200, the first O-ring 240 is external. Is exposed. In a state where the first O-ring 240 is exposed, there is a possibility that the waterproof performance may be deteriorated by being damaged during carrying. In the camera system 1, a protective cover for protecting the first O-ring can be attached to the camera body 200 in which the interchangeable lens 100 is not attached.

  FIG. 8 shows a state in which a protective cover 600 for protecting the first O-ring 240 is attached to the camera body 200. The protective cover 600 is provided so as not to protrude from the mounting surface 222 of the body-side mount part 220, and covers the first O-ring 240 and the first groove part 270 so as not to be exposed to the outside.

  FIG. 9 is a partially enlarged view of FIG. 8, in which the periphery of the protective cover 600 is enlarged. The protective cover 600 includes a first cover 601 and a second cover 602, and the second cover is fixed to the first cover 601. The boundary between the first cover 601 and the second cover 602 has a stepped shape in order to ensure a wide bonding surface.

  The first cover 601 is formed of an elastic member such as rubber and includes a hooking portion 610 and a buffering portion 620. The latching part 610 is hooked on the opening of the first groove part 270 of the camera body 200. The buffer portion 620 functions as a spacer for preventing the second cover 602 from contacting the case 250 of the camera body 200.

  When the latching portion 610 of the first cover 601 is hooked on the opening of the first groove portion 270, the contact surface 630 of the first cover 601 contacts the first O-ring 240, and the first O-ring 240 is a groove of the first groove portion 270. Compressed between the bottom and the contact surface 630. At this time, since the first cover 601 is supported by the force applied from the first O-ring 240, no backlash occurs. Further, the latching portion 610 protrudes from the contact surface 630, and when the latching portion 610 is latched by the opening of the first groove portion 270, the parallel surface 611 contacting the groove wall of the first groove portion 270 is a groove. Parallel to the wall. The latching portion 610 has an inclined surface 612 between the contact surface 630 and the parallel surface 611 of the latching portion 610.

  In order to ensure that the protective cover 600 is mounted smoothly, the protective cover 600 has a notch 640 between the buffer portion 620 and the contact surface 630, and the buffer portion 620 of the first cover 601 has a notch portion 640. The vicinity does not cover the opening of the first groove portion 270.

  The second cover 602 is made of a material such as plastic, and prevents the first cover 601 from being damaged by a sharp object. The second cover 602 has a decorative surface 650 that is exposed to the outside when the protective cover 600 is attached. The decorative surface 650 can be printed with predetermined characters, symbols, and marks, or can be provided with a shape, pattern, or color that can be visually aesthetically pleasing, or a decoration that combines them. The camera body 200 can be improved in aesthetics as compared with the state in which the first O-ring 240 is exposed to the outside by mounting the protective cover 600 having decoration on the decorative surface 650.

  10A and 10B are a front view and a rear view of the protective cover 600. FIG. FIG. 11 is a perspective view of the protective cover 600. As apparent from FIG. 10A and FIG. 11, the latching portion 610 of the first cover 601 is provided only on a part of the inner periphery of the first cover 601. By not providing the latching portion 610 on the entire inner periphery of the first cover 601, it becomes easy to attach the protective cover 600 to the camera body 200. Further, as is apparent from FIG. 10A and FIG. 11, the buffer portion 620 is also provided only on a part of the inner periphery of the first cover 601.

  An operation of attaching / detaching the interchangeable lens 100 and the protective cover 600 to / from the camera body 200 will be described. When the user attaches the interchangeable lens 100 to the camera body 200 in the state of FIG. 2, the user inserts the holding portion 230 of the camera body 200 into the concave portion 160 of the interchangeable lens 100. When the first O-ring 240 of the camera body 200 is inserted into the recess 160 of the interchangeable lens 100, the first O-ring 240 of the camera body 200 is crushed by the inner periphery of the projecting portion 150 of the interchangeable lens 100, and the holding portion 230. Can be inserted deeper into the recess 160. When the attachment surface 222 of the body side mount part 220 of the camera body 200 reaches the lens side mount part 140 of the interchangeable lens 100, the lens side mount part 140 is attached to the body side mount part 220 by a predetermined operation. When the interchangeable lens 100 is removed from the camera body 200, the reverse process is performed. When the first O-ring 240 is removed from the recess 160, the first O-ring 240 returns to its original shape due to the elastic force.

  When the user attaches the protective cover 600 to the camera body 200 to which the interchangeable lens 100 is not attached, the user passes the holding part 230 of the camera body 200 through the opening of the protective cover 600 as shown in FIG. The holding part 230 of the camera body 200 is inserted from the back side of the protective cover 600. When the holding part 230 comes into contact with the inclined surface 612 of the latching part 610 of the protective cover 600, the first cover 601 is elastically deformed so that the holding part 230 can be inserted deeper. When the holding part 230 is inserted until the latching part 610 of the protective cover 600 reaches the position of the first groove part 270, the latching part 610 returns to its original shape by the elastic force, and the latching part 610 is inserted into the first groove part 270. The parallel plane 611 is applied. When the holding portion 230 is further inserted, the buffer portion 620 of the protective cover 600 contacts the front surface 201 of the case 250 of the camera body 200. When removing the protective cover 600 from the camera body 200, the reverse process is performed.

According to the embodiment described above, the following operational effects can be obtained.
The camera system 1 includes a camera body 200 and an interchangeable lens 100 that is detachably attached to a front surface 201 of a case 250 of the camera body 200.
The camera body 200 includes a body-side mount part 220, a holding part 230, and a first O-ring 240. The body side mount part 220 is provided on the outer peripheral side of the opening part 210 provided in the front surface 201 of the case 250 of the camera body 200, and the interchangeable lens 100 is detachably attached thereto. The holding part 230 protrudes in a cylindrical shape on the front surface 201 of the camera body 200, and a first groove part 270 is provided along the outer periphery of the cylindrical wall. The first O-ring 240 is held in the first groove part 270 of the holding part 230.
The interchangeable lens 100 is one type of accessory that is detachably attached to the camera body 200, and includes a lens-side mount portion 140 and a projecting portion 150. The lens side mount part 140 is detachably attached to the body side mount part 220. The protruding portion 150 protrudes in a cylindrical shape outside the lens-side mount portion 140.
The holding part 230 is provided on the outer peripheral side of the body side mount part 220.
The protruding portion 150 is located further on the outer peripheral side than the holding portion 230 when the lens side mount portion 140 is attached to the body side mount portion 220.
The first O-ring 240 is compressed by the projecting portion 150 when the lens side mount portion 140 is attached to the body side mount portion 220.
In the camera system 1, the third O-ring 420 is not provided on the interchangeable lens 100 side as in the prior art, and the first O-ring 240 is provided on the camera body 200 side. Therefore, the interchangeable lens 100 has the depth of the third groove 410. Only the conventional interchangeable lens 400 can be made smaller. Since the outer peripheral side of the holding portion 230 of the camera body 200 is in contact with the inner peripheral side of the protruding portion 150 of the interchangeable lens 100, the camera body 500 is in contact with the outer side of the third O-ring 420. The waterproof structure can be reduced in size. Since the waterproof structure of the camera body 200 can be made smaller than the conventional camera body 500, the entire camera body 200 can be made smaller than before.

The embodiment described above can be implemented with the following modifications.
[Modification 1] Accessories other than the interchangeable lens 100 are included in the accessories according to the embodiment of the present invention. For example, an intermediate adapter that can be inserted between the interchangeable lens 100 and the camera body 200 is also included in the accessory.
[Modification 2] The cross-sectional shape of the protective cover 600 is not limited to the shape shown in FIG. For example, the shape shown in FIG. The protective cover 700 illustrated in FIG. 12 includes a second cover 602 and a third cover 701. The third cover 701 includes a hooking portion 710 that hooks on the opening of the first groove 270 of the camera body 200 and a buffering portion 620. The latching portion 710 is longer than the latching portion 610 of FIG. 9 and has a contact surface 711 that contacts the first O-ring 240. The first O-ring 240 is compressed by the contact surface 711 and the groove wall of the first groove portion 270. The protective cover 700 is not rattled by the pressure received by the latching portion 710 from the first O-ring 240.
[Modification 3] The camera body 200 may be formed such that the holding portion 230 and the support portion 221 are integrated with the case 250. When the holding unit 230 and the support unit 221 are integrally formed with the case 250, the camera body 200 can omit the second O-ring 290.

  The embodiments and modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired. Further, the embodiments and modifications described above may be combined and executed as long as the features of the invention are not impaired.

DESCRIPTION OF SYMBOLS 1 Camera system, 100 Interchangeable lens, 140 Lens side mount part, 150 Projection part, 160 Recessed part, 170 Side surface, 200 Camera body, 210 Opening part, 220 Body side mount part, 221 Support part, 230 Holding part, 240 1O Ring, 250 case, 270 first groove, 280 second groove, 290 second O-ring, 300 first cylinder, 310 second cylinder, 600,700 protective cover, 601 first cover, 602 second cover, 610, 710 latching part, 620 buffer part, 630 contact surface

Claims (5)

A camera body to which an interchangeable lens is detachably attached,
A main body having an opening;
A protrusion provided on the main body portion surrounding the opening,
A mount portion provided on the projecting portion, to which the interchangeable lens is mounted;
A groove provided on the outer periphery of the protruding portion;
An O-ring held in the groove;
And a protective cover that covers the O-ring held in the groove. The camera body according to claim 1,
In a state where the O-ring held in the groove portion is not covered by the protective cover, a first interchangeable lens is attached to the mount portion,
The first interchangeable lens is a camera body having a close contact portion that is in close contact with the O-ring held in the groove portion while being mounted on the mount portion. The camera body according to claim 2,
A camera body in which a second interchangeable lens different from the first interchangeable lens is attached to the mount portion in a state where the protective cover covers the O-ring held in the groove portion. The camera body according to any one of claims 1 to 3,
The protective cover is
A latching portion that latches on the groove,
A compression part that compresses the O-ring in a state where the latching part is hanging on the groove part;
With camera body. The camera body according to any one of claims 1 to 4,
The protective cover is
A first member protecting the O-ring;
A second member fixed to the first member and concealing the first member from the outside;
Have
The camera body, wherein the first member includes a buffer portion that prevents the second member from coming into contact with the protruding portion.

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