JP2012052853A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital camera capable of reducing the number of components by obviating the need for a light-emitting element to be exclusively used for an optical encoder and also capable of improving a degree of freedom for a layout of an electric substrate.SOLUTION: The digital camera is supported by a front ring so as to be able to rotate integrally with the front ring which is rotationally operative with respect to an exterior member, and comprises: a rotary member 5 provided with a plurality of slits 51 at constant intervals in the rotational direction; the light-emitting element for radiating light toward a display window 3 formed on the exterior member; light guide members 6 guiding the light emitted by the light-emitting element to radiate it toward the rotary member 5; and light receiving elements 7 for receiving the light which is radiated from radiation ends 62 of the light guide members 6 and passed through the slits 51 of the rotary member 5.

Description

  The present invention relates to an electronic apparatus such as a digital camera having an optical encoder.

  Conventional optical encoders generally have a moving plate in which a plurality of slits are formed, a light emitting element that emits light toward the moving plate, light transmitted through the slit of the moving plate that rotates or goes straight, or a moving plate And a light receiving element that receives light reflected by the shielding portion between the slits.

  A pulse signal is generated by A / D converting an electrical signal obtained by photoelectrically converting light received by the light receiving element, and a moving amount of the moving plate is detected based on the generated pulse signal (Patent Literature). 1 and 2).

JP 2000-230841 A JP-A-5-276726

  However, in Patent Documents 1 and 2, a moving plate, a light emitting element, and a light receiving element are indispensable as components of the optical encoder, so it is difficult to reduce the number of parts. In addition, the circuit scale of the electric board on which the light emitting element and the light receiving element are mounted is increased, and the degree of freedom in layout of the electric board is reduced.

  Accordingly, an object of the present invention is to provide an electronic apparatus that can reduce the number of parts by eliminating the light emitting element dedicated to the optical encoder and can increase the degree of freedom in the layout of the electric board. .

  In order to achieve the above object, an electronic apparatus of the present invention is supported by an exterior member, an operation member that can be rotated with respect to the exterior member, and the operation member that can move integrally with the operation member, A moving member provided with a plurality of slits in a moving direction, a light emitting element that emits light toward a display window formed in the exterior member, and a light guide that emits light emitted from the light emitting element, and the moving member And a light receiving element that receives light emitted from the light guide member and passed through the slit of the moving member.

  An electronic device according to the present invention includes an exterior member, an operation member that can be rotated with respect to the exterior member, and is supported by the operation member so as to be able to move integrally with the operation member. A moving member provided; a light emitting element that emits light toward a display window formed on the exterior member; and a light guide member that guides light emitted from the light emitting element and irradiates the light toward the moving member. And a light receiving element that receives the light irradiated from the light guide member and reflected by a shielding portion between adjacent slits of the moving member.

  According to the present invention, it is possible to reduce the number of parts by eliminating the light emitting element dedicated to the optical encoder, and it is possible to increase the degree of freedom of the layout of the electric board.

1 is an external perspective view for explaining a digital camera which is a first embodiment of an electronic apparatus according to the present invention. It is a flowchart for demonstrating the setting method of exposure correction or white balance by a user. It is a disassembled perspective view for demonstrating an optical encoder. It is an expansion perspective view which shows the example of a connection of a display window and a light guide member. It is a perspective view which shows the assembly state of an optical encoder. It is a principal part perspective view of the optical encoder provided in the digital camera which is 2nd Embodiment of the electronic device of this invention. It is the perspective view seen from the downward direction of FIG. It is a disassembled perspective view of the optical encoder provided in the digital camera which is 3rd Embodiment of the electronic device of this invention. (A) is the perspective view which shows the example of arrangement | positioning with the two arm parts integrally provided in the display window, and the holder holding the holding substrate of a light receiving element, (b) is the perspective view seen from the lower part of (a). is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an external perspective view for explaining a digital camera which is a first embodiment of an electronic apparatus according to the present invention.

  As shown in FIG. 1, in the digital camera of this embodiment, a lens barrel 1a is provided in the front portion of a camera body 1, and a front ring 2 is substantially coaxial with the lens barrel 1a around the lens barrel 1a. Is provided so as to be rotatable with respect to the exterior member.

  A display window 3 is provided in the upper part of the front side of the camera body 1 in the vicinity of the front ring 2, and a light emitting element 4 such as an LED (see FIG. 3) is disposed inside the display window 3. ing. Here, the front ring 2 corresponds to an example of the operation member of the present invention.

  FIG. 2 is a flowchart for explaining a method for setting exposure correction or white balance by the user.

  First, when the user presses a setting key (not shown) provided on the back side of the camera body 1 at the time of shooting (step S201), the light emitting element 4 is turned on and light is irradiated onto the display window 3 formed on the exterior member. (Step S202). The light of the light emitting element 4 is emitted from the display window 3, whereby the display window 3 is turned on and the user can confirm that the exposure correction or white balance setting operation is valid. An exposure correction or white balance setting screen is displayed on a display unit (not shown) such as an LCD provided on the back side of the camera body 1 (step S203).

  Next, when the user rotates the front ring 2 (step S204), the setting value on the setting screen displayed on the display unit is changed stepwise (step S205). When the user presses the setting key with a desired setting value (step S206), the setting is completed and the setting screen is ended (step S207). The light emitting element 4 is also turned off and the display window 3 is turned off. (Step S208).

  Here, a control unit (not shown) performs lighting / extinguishing control of the light emitting element 4 based on a user operation of the setting key, and performs display control of the display unit based on a user operation of the setting key and the front ring 2.

  Further, the control unit detects a rotation amount (movement amount) when the front ring 2 is rotated based on a signal from the optical encoder, and sets a setting value on the setting screen displayed on the display unit according to the detection result. Change display.

  Next, the optical encoder will be described with reference to FIGS. 3 is an exploded perspective view for explaining the optical encoder, FIG. 4 is an enlarged perspective view showing an example of connection between the display window 3 and the light guide member 6, and FIG. 5 is a perspective view showing an assembled state of the optical encoder. is there.

  As shown in FIG. 3, an annular rotating member 5 that rotates integrally with the front ring is supported on the front ring 2 substantially coaxially via a hook 5a. A plurality of slits 51 are formed in the rotating member 5 at regular intervals in the circumferential direction, and a space between adjacent slits in the circumferential direction is a light-shielding portion. Here, the rotating member 5 corresponds to an example of the moving member of the present invention.

  The light emitting element 4 is held on the holding substrate 4 a and is covered with the display window 3 from the front side of the camera body 1. As shown in FIG. 4, the display window 3 is connected to the daylighting ends 61 of the two light guide members 6 made of an optical fiber or the like. The light guide member 6 collects the light emitted from the light emitting element 4 at the lighting end 61 and guides the collected light to the irradiation end 62 side.

  As shown in FIG. 5, the irradiation end 62 of the light guide member 6 is disposed at a position facing the annular portion of the rotation member 5 in the axial direction, and the irradiation end 62 of the light guide member 6 with the rotation member 5 interposed therebetween. The light receiving element 7 held on the holding substrate 7a is disposed at a position facing the.

  Here, as described above, when the front ring 2 is rotated while the light emitting element 4 is turned on at the time of exposure correction or white balance setting by the user, the rotating member 5 rotates in conjunction with the front ring 2.

  When the slit 51 of the rotating member 5 crosses the irradiation end 62 of the light guide member 6, the light irradiated from the irradiation end 62 of the light guide member 6 passes through the slit 51 and is received by the light receiving element 7. . Further, when the shielding portion of the rotating member 5 crosses the irradiation end 62 of the light guide member 6, the light emitted from the irradiation end 62 of the light guide member 6 is reflected by the light shielding portion and is not received by the light receiving element 7.

  The control unit generates a pulse signal by performing A / D conversion on an electrical signal obtained by photoelectrically converting the light received by the light receiving element 7, and detects the amount of rotation of the rotating member 5 based on the generated pulse signal. Then, the setting value of the setting screen displayed on the display unit is changed stepwise according to the detection result.

  As described above, in the present embodiment, the light emitting element 4 that turns on and displays the display window 3 when exposure correction or white balance is set by rotating the front ring 2 is also used as the light emitting element of the optical encoder.

  This eliminates the need for a light-emitting element dedicated to the optical encoder, thereby reducing the number of components, and reducing the circuit scale near the light-receiving element 7 and increasing the degree of freedom in the layout of the electric board.

(Second Embodiment)
Next, a digital camera which is a second embodiment of the electronic apparatus of the present invention will be described with reference to FIGS. In addition, about the part which overlaps or corresponds to the said 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

  FIG. 6 is a perspective view of a principal part of an optical encoder provided in a digital camera which is a second embodiment of the electronic apparatus according to the present invention, and FIG. 7 is a perspective view as seen from below in FIG. In FIG. 7, the holding substrate 7a of the light receiving element 7 is not shown.

  As shown in FIG. 6, in the digital camera of this embodiment, the irradiation end 62 of the light guide member 6 is disposed on the light receiving element 7 side. In the holding substrate 7 a of the light receiving element 7, a hole 7 b in which the irradiation end 62 of the light guide member 6 is disposed is formed close to the light receiving element 7.

  Here, as described above, when the front ring 2 is rotated while the light emitting element 4 is turned on at the time of exposure correction or white balance setting by the user, the rotating member 5 rotates in conjunction with the front ring 2.

  Then, referring to FIG. 7, when the slit 51 of the rotating member 5 crosses the irradiation end 62 of the light guide member 6, the light emitted from the irradiation end 62 of the light guide member 6 passes through the slit 51. The light receiving element 7 does not receive light.

  Further, when the shielding portion of the rotating member 5 crosses the irradiation end 62 of the light guide member 6, the light emitted from the irradiation end 62 of the light guide member 6 is reflected by the light shielding portion and received by the light receiving element 7. . Other configurations and operational effects are the same as those of the first embodiment.

(Third embodiment)
Next, a digital camera which is a third embodiment of the electronic apparatus of the invention will be described with reference to FIGS. In addition, about the part which overlaps or corresponds to the said 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

  FIG. 8 is an exploded perspective view of an optical encoder provided in a digital camera which is a third embodiment of the electronic apparatus of the present invention. FIG. 9A is a perspective view showing an arrangement example of two arms 3a and 3b provided integrally with the display window 3 and a holder 9 for holding the holding substrate 7a of the light receiving element 7, and FIG. It is the perspective view seen from the downward direction of Fig.9 (a). In FIG. 9B, the light receiving element 7 and the holding substrate 7a are not shown.

  As shown in FIGS. 8 and 9, the digital camera of the present embodiment has two arm portions 3a and 3b made of a light guide member provided integrally with the display window 3, and the two arm portions 3a and 3b are The light emitted from the light emitting element 4 is guided to the irradiation end 31. The irradiation ends 31 of the two arm portions 3a and 3b are formed in a convex lens shape to condense the guided light.

  The holding substrate 7 a of the light receiving element 7 is held by a holder 9 on the side facing the rotating member 5, and a hole 92 is formed in the holder 9 at a portion corresponding to the light receiving element 7. Further, small holes 71 are formed in the holding substrate 7 a of the light receiving element 7 in close proximity to the two light receiving elements 7.

  The irradiation ends 31 of the two arm portions 3a and 3b are arranged at positions facing the two small holes 71 from the back side of the holding substrate 7a (opposite side of the holder 9). A notch 91 is formed in a portion of the inner peripheral wall of the hole 91 of the holder 9 corresponding to the small hole 71 of the holding substrate 7a. Thereby, the light condensed at the irradiation ends 31 of the two arm portions 3a and 3b passes through the small hole 71 of the holding substrate 7a and the notch 91 of the holder 9 toward the annular portion of the rotating member 5. Irradiated.

  Here, as described above, when the front ring 2 is rotated while the light emitting element 4 is turned on at the time of exposure correction or white balance setting by the user, the rotating member 5 rotates in conjunction with the front ring 2.

  When the slit 51 of the rotating member 5 crosses the irradiation end 31 of the two arm portions 3 a and 3 b, the light irradiated from the irradiation end 31 passes through the slit 51 and is not received by the light receiving element 7. Further, when the shielding portion of the rotating member 5 crosses the irradiation ends 31 of the two arm portions 3 a and 3 b, the light emitted from the irradiation ends 31 is reflected by the light shielding portion and received by the light receiving element 7. Other configurations and operational effects are the same as those of the first embodiment.

  The configuration of the present invention is not limited to those exemplified in the above embodiments, and the material, shape, dimensions, form, number, arrangement location, and the like are appropriately changed without departing from the gist of the present invention. Is possible.

  For example, in each of the above embodiments, an optical rotary encoder is illustrated, but an optical linear encoder may be used.

DESCRIPTION OF SYMBOLS 1 Camera body 2 Front ring 3 Display window 4 Light emitting element 5 Rotating member 6 Light guide member 7 Light receiving element 51 Slit

Claims (4)

An exterior member;
An operation member that can be rotated with respect to the exterior member;
A moving member that is supported by the operating member so as to be able to move integrally with the operating member, and is provided with a plurality of slits in the moving direction;
A light emitting element that emits light toward a display window formed in the exterior member;
A light guide member that guides light emitted by the light emitting element and irradiates the light toward the moving member;
An electronic apparatus comprising: a light receiving element that receives light irradiated from the light guide member and passed through the slit of the moving member. An exterior member;
An operation member that can be rotated with respect to the exterior member;
A moving member that is supported by the operating member so as to be able to move integrally with the operating member, and is provided with a plurality of slits in the moving direction;
A light emitting element that emits light toward a display window formed in the exterior member;
A light guide member that guides light emitted by the light emitting element and irradiates the light toward the moving member;
An electronic apparatus comprising: a light receiving element that receives light emitted from the light guide member and reflected by a shielding portion between adjacent slits of the moving member.   The electronic apparatus according to claim 1, further comprising a display window that covers the light emitting element, wherein the light guide member is formed integrally with the display window.   4. The apparatus according to claim 1, further comprising a control unit configured to detect a movement amount of the operation member based on a signal from the light receiving element, and to perform display control of the display unit according to the detection result. The electronic device described.

Images