JP2008028649A - Camera and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera and electronic equipment capable of preventing a sound generated in the body from being transmitted to and picked up by a microphone. <P>SOLUTION: A holding member 200 which is made of a rubber material and holds the microphone 5 is arranged behind a microphone hole 4. A rib 210 having a nearly-U-shaped section which is raised forward is provided in the front of the holding member 200. A V groove 110 is formed on the reverse side of a cover 1 at a position opposed to the rib 210. In a state where the digital camera is assembled, a battery box 9 presses the holding member 200 forward. The holding member 200 pressed forward by the battery box 9 abuts a front end 211 of the rib 210 against the V groove 110 of the cover 1 over the entire circumference. When the front end 211 of the rib 210 abuts against the V groove 110, the front end 211 abuts against both of a first slope 111 and a second slope 112. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a camera and an electronic device provided with a microphone.

  There is known an electronic device in which a microphone holder that holds a microphone is attached in contact with a housing of the electronic device (see Patent Document 1).

Japanese Patent Laid-Open No. 10-285259

  However, in a conventional electronic device, if a microphone and a microphone holder are disposed on the curved surface portion of the housing, a gap may be formed at a contact portion between the microphone holder and the housing. Therefore, the sound generated inside the casing is transmitted to the microphone through this gap and collected.

(1) A camera according to a first aspect of the present invention includes an imaging means provided in a housing, a microphone, and an elastic member. The camera has an opening in front of the sound collection surface of the microphone, and holds the microphone in the housing. A holding member to be attached, and a concave portion is provided in one of the holding member and the casing, and a convex portion is provided in either one of the holding member and when the holding member is pressed toward the casing, The convex portion is in contact with each of the second surface different from the first surface and the first surface.
(2) The invention according to claim 2 is the camera according to claim 1, wherein the holding member is provided with a convex portion, and the housing is provided with a concave portion.
(3) The invention of claim 3 is the camera according to claim 1, wherein the holding member is provided with a recess, and the housing is provided with a protrusion.
(4) The invention of claim 4 is the camera according to any one of claims 1 to 3, wherein the convex portion or the concave portion provided in the holding member is provided around the opening, and the holding member is the housing. When pressed toward the top, the convex portion comes into contact with each of the first surface and the second surface of the concave portion over the entire circumference.
(5) The invention of claim 5 is the camera according to any one of claims 1 to 4, further comprising a pressing member that presses the holding member toward the housing.
(6) The invention according to claim 6 is the camera according to claim 5, wherein the pressing member is in the vicinity of a contact portion between the convex portion and the concave portion when the holding member and the housing are viewed from the pressing member side. The contact member is pressed to press the holding member.
(7) An electronic device according to a seventh aspect of the present invention includes a microphone and an elastic member, and has an opening on the front surface of the sound collection surface of the microphone, and includes a holding member that holds the microphone and attaches to the housing When either one of the member and the housing is provided with a recess, the other is provided with a protrusion, and the holding member is pressed toward the housing, the first surface and the first surface of the recess The convex portion is in contact with each of the different second surfaces.

  According to the present invention, it is possible to prevent sound generated inside the body from being transmitted to the microphone and collected.

  An embodiment in which the present invention is applied to a camera will be described with reference to FIGS. FIG. 1 is a front view of a digital camera which is an example of a camera to which the present invention is applied. The digital camera 100 is a so-called compact digital camera equipped with a retractable lens, and is provided with a lens barrel 2 that is drawn out of the retracted state in the optical axis direction of the lens. In the following description, the front side of the paper surface in FIG. 1, which is the subject side along the lens optical axis of the digital camera 100, is the front side, and the back side of the paper surface is the rear side. The front-rear direction in each figure is defined with reference to the mounting posture.

  A light emitting window 3 and a microphone hole 4 of the flash device are provided on the front surface of the cover 1. As will be described in detail later, a microphone is attached behind the microphone hole 4. A shutter release button 6 is provided at the upper part of the cover 1, and a battery cover 7 is provided at the lower part of the cover 1. 2 is a cross-sectional view taken along arrow II-II in FIG. In FIG. 2, reference numeral 21 denotes a focus lens for focusing, and reference numeral 22 denotes a lens chamber that holds the focus lens 21. Reference numeral 31 denotes an image sensor that captures a subject image, and reference numeral 32 denotes a liquid crystal monitor that displays an image captured by the image sensor 31 and various types of information. AX1 indicates a lens optical axis. On the back of the digital camera 100, a zoom button (not shown) for adjusting the focal length, a menu button (not shown) that is a switch for displaying various information setting items and information menu screens on the liquid crystal monitor 32, and the like. Is provided.

  FIG. 3 is a diagram showing a drive mechanism 40 that drives the focus lens 21. Reference numeral 41 denotes a focus motor, reference numeral 42 denotes a feed screw, reference numeral 43 denotes a carriage, and reference numeral 44 denotes a guide shaft. When the feed screw 42 is rotated by driving the focus motor 41, the carriage 43 that is screwed with the feed screw 42 is driven in the front-rear direction. Since the arm portion 22 a is in contact with the carriage 43, the lens chamber 22 is driven in the front-rear direction along the guide shaft 44 together with the carriage 43 by driving the focus motor 41. As a result, the focus lens 21 is driven along the optical axis direction in front of the image sensor 31.

  In addition to the still image capturing function, the digital camera 100 includes a moving image shooting function, a voice recording function during moving image shooting, and a voice memo function that records voice regardless of the imaging operation. Image data captured by the image sensor and audio data captured by the microphone 5 are recorded as electronic data on a recording medium (not shown) attached to the digital camera 100.

---- Mic 5 mounting structure ---
4 is a cross-sectional view taken along arrow IV-IV when the vicinity of the microphone hole 4 is seen from above the digital camera 100 shown in FIG. A microphone 5 and a holding member 200 made of a rubber material are disposed behind the microphone hole 4. The microphone 5 is held between the battery box 9 forming the battery chamber 8 and the back surface of the cover 1 together with the holding member 200 while being held by the holding member 200.

  5 is a view showing the cover 1 in the cross-sectional view taken along the line IV-IV shown in FIG. 4, and FIG. 6 is a perspective view of the vicinity of the microphone hole 4 when the cover 1 is viewed from the back side. It is. A V-groove 110 is formed around the microphone hole 4 on the back side (back side) of the cover 1. The inner slope constituting the V groove 110 is called a first slope 111, and the outer slope is called a second slope 112. A curved surface that gently connects the first inclined surface 111 and the second inclined surface 112 in the vicinity of the valley portion of the V groove 110 is referred to as a valley surface 113. Each of the inclined surfaces 111 and 112 corresponds to a part of a conical surface having an axis AX2 extending in the front-rear direction (optical axis direction) with the microphone hole 4 as the center.

  FIG. 7 is a side view of the microphone 5. The microphone 5 is a small condenser microphone having a substantially cylindrical shape, and an opening (not shown) for collecting sound is provided at the center of the front surface. An end face having a sound collection opening is referred to as a sound collection side end face 51.

  FIG. 8 is a cross-sectional view of the holding member 200, and FIG. 9 is a perspective view of the holding member 200 as viewed obliquely from the front. The holding member 200 is a holding member of the microphone 5 integrally formed of a rubber material such as silicone rubber or ethylene propylene rubber (EPDM), and has a bottomed cylindrical shape having an opening 201 in the front. A portion corresponding to the inside of the cylinder of the holding member 200 is a microphone holding portion 202 that holds the microphone 5. A protrusion 203 is erected on the front portion of the inner peripheral surface of the microphone holding portion 202. The opening 201 is formed by the ridge 203.

  A bottom portion 204 corresponding to the bottom of the bottomed cylinder is provided behind the microphone holding portion 202. The bottom portion 204 is provided with a hole (not shown) through which a lead wire (not shown) of the microphone 5 is inserted. A rib 210 protruding forward is provided on the front surface of the holding member 200 so as to surround the periphery of the opening 201. The front end 211 of the rib 210 is formed with a convex curved surface so that the cross-sectional shape of the rib 210 is substantially U-shaped. On the outer peripheral surface in front of the holding member 200, a flange-shaped flange portion 220 is provided. A rib 222 is erected on the outer peripheral side of the rear surface 221 of the flange 220 toward the rear.

  As shown in FIG. 4, when the microphone 5 is held by the holding member 200, the side surface of the microphone 5 is held by the inner peripheral surface of the microphone holding unit 202, and movement in the radial direction is restricted, and the sound collecting side end face 51. The vicinity of the outer periphery of the protrusion abuts on the rear surface of the ridge 203 and the forward movement is restricted. Note that the radial direction means a direction perpendicular to an axis parallel to the front-rear direction of the digital camera 100. Since the sound collection side end face 51 faces the opening 201 except for the vicinity of the outer periphery, the sound collection opening of the microphone 5 is not blocked by the holding member 200. Further, when the microphone 5 is held by the holding member 200, the outer periphery of the rear surface of the microphone 5 abuts on the curved surface connecting the inner peripheral surface of the microphone holding portion 202 and the inner surface of the bottom portion 204, and rearward movement is restricted. Is done. That is, the microphone 5 is elastically held by the holding member 200 and is fixed so as not to move in the front-rear direction and the radial direction with respect to the holding member 200.

  As shown in FIG. 4, in a state where the digital camera 100 is assembled, the battery box 9 comes into contact with the rear surface 221 of the flange portion 220 and presses the holding member 200 holding the microphone 5 forward. In the holding member 200 urged forward by the battery box 9, the front end 211 of the rib 210 contacts the V groove 110 of the cover 1 over the entire circumference.

  FIG. 10 is a diagram illustrating a contact state between the front end 211 of the rib 210 and the V groove 110. The curvature of the valley surface 113 of the V groove 110 is smaller than the curvature of the front end 211 of the rib 210. Therefore, when the rib 210 abuts against the opposing V groove 110, the front end 211 abuts both the first slope 111 and the second slope 112. That is, the front end 211 contacts the V groove 110 at two locations. When the holding member 200 is pressed forward by the battery box 9, the front end 211 is elastically deformed and is in close contact with both the first slope 111 and the second slope 112 over the entire circumference.

  The V groove 110 also plays a role of guiding the rib 210. When the front end 211 of the rib 210 abuts on the V groove 110, the holding member 200 is guided so that the central axis of the microphone 5 substantially coincides with the axis AX <b> 2 of the microphone hole 4 by the rib 210 being guided by the V groove 110. Be guided. As a result, when the holding member 200 holding the microphone 5 is attached to the digital camera 100, the sound collection opening of the microphone 5 and the microphone hole 4 are on a straight line (on the axis AX2) substantially parallel to the lens optical axis AX1. The sound collection performance of the microphone 5 is not hindered.

--- About contact position of battery box 9 ---
As shown in FIG. 4, in a state where the digital camera 100 is assembled, the holding member 200 is sandwiched between the battery box 9 and the cover 1. At this time, the holding member 200 is in a state where the flange portion 220 is pressed forward and the rib 210 is pressed backward. In other words, a compressive force is applied to the holding member 200 when the forces act oppositely in the front-rear direction. However, when the operating position of the opposing compressive force is greatly deviated when the holding member 200 is viewed from the front-rear direction, shear stress and bending stress are generated in the holding member 200.

  If the shearing stress and bending stress generated in this way are excessive, there is a risk that unintended deformation of the holding member 200 will occur or the contact state between the rib 210 and the V groove 110 may be adversely affected. Therefore, in the digital camera 100 according to the present embodiment, the radially inner side of the flange portion 220 is applied as much as possible so that the battery box 9 comes into contact with and presses the vicinity of the rib 210 when the holding member 200 is viewed from the front-rear direction. Designed to touch. However, the battery box 9, the outer peripheral surface of the holding member 200, and the inner peripheral surface of the rib 222 are not disturbed by the rib 210 being guided by the V-shaped groove 110 and guiding the position of the holding member 200. A moderate dimensional difference is provided.

---- Sound transmission path ---
As described above, when the holding member 200 holding the microphone 5 is attached to the digital camera 100 (FIG. 4), the space facing the sound collection side end surface 51 communicates with the space outside the cover 1 through the microphone hole 4. However, the space inside the cover 1 and outside the holding member 200 is spatially insulated.

  For example, when a moving image is shot together with sound with the digital camera 100, a focusing operation is performed according to the movement of the subject, so that the driving mechanism 40 operates to generate an operating sound. In addition, when a photographer is instructed to change the focal length during shooting of a moving image, a lens driving mechanism (not shown) is activated to generate an operating sound. Sounds generated inside the digital camera 100 such as these operating sounds are blocked by the holding member 200 and the contact portion between the rib 210 and the V groove 110, so that the sound collecting side end surface of the microphone 5 is used. The space that 51 faces does not reach directly. Note that sound outside the digital camera 100 reaches the sound collecting side end surface 51 of the microphone 5 through the microphone hole 4 and is collected by the microphone 5. Thereby, since the recording level of the sound generated inside the digital camera 100 can be lowered, the sound quality of the recorded sound can be improved.

As described above, the digital camera 100 according to the present embodiment is configured such that the rib 210 of the holding member 200 is brought into contact with the V-shaped groove 110 of the cover 1, thereby providing the following advantages.
(1) Since the rib 210 and the V-groove 110 are abutted at two locations, even if a foreign object is caught between one abutment portion and a gap is formed, the other abutment portion can abut without a gap. Performance can be secured.

(2) By contacting the rib 210 and the V-shaped groove 110, the contact of the contact portion is sufficient even if the contact portion dimension d (see FIG. 10) is small compared to the case of contact between the flat surfaces. Area is secured.
Moreover, the design value of the deformation amount of the rib 210 due to pressing may be determined in advance depending on the specification. Even in such a case, since the contact portion dimension d is small in the apparatus of this embodiment, that is, the width of the rib 210 is small, the repulsive force received from the holding member 200 when the digital camera 100 is assembled is reduced. And easy to assemble.
Even if a harder material that is less expensive than the conventional apparatus is used for the holding member 200, the apparatus according to the present embodiment has a small contact portion dimension d, and therefore receives from the holding member 200 when the digital camera 100 is assembled. The repulsive force can be reduced and it becomes easy to assemble.

The digital camera 100 described above has the following operational effects.
(1) Since the front end 211 of the rib 210 is in contact with both the first slope 111 and the second slope 112 of the V groove 110 when the holding member 200 is pressed toward the cover 1, the drive mechanism Sound generated inside the digital camera 100, such as the operation sound of 40, can be blocked by the contact portion between the rib 210 and the V groove 110. Thereby, since the recording level of the sound generated inside the digital camera 100 can be lowered, the sound quality of the recorded sound can be improved.

(2) The holding member 200 is provided with ribs 210 that are convex portions, and the cover 1 is provided with V grooves 110 that are concave portions. Therefore, contrary to the above case, the distance between the microphone 5 and the cover 1 via the holding member 200 without increasing the overall size of the holding member 200 as compared with the case where the holding member 200 is provided with a V-groove. Can be secured. As a result, noise caused by vibration transmitted from the cover 1 can be effectively reduced, and both the demands for higher sound quality of recorded sound and miniaturization of the digital camera 100 can be met.

(3) The rib 210 and the V-shaped groove 110 are configured to contact over the entire circumference. Thereby, since there is no gap between the holding member 200 and the cover 1, the recorded sound can be reliably improved in sound quality.

(4) Since the battery box 9 is configured to press the holding member 200 toward the front cover 1, the sound insulation performance can be ensured by improving the adhesion between the rib 210 and the V groove 110, and the holding member 200 can be held. Fixing is realized with a simple configuration, which contributes to a reduction in manufacturing costs.

(5) When the holding member 200 is viewed from the front-rear direction, the battery box 9 is configured to contact the inner side in the radial direction of the flange 220 as much as possible so that the battery box 9 contacts and presses in the vicinity of the rib 210. Thereby, the shearing stress and bending stress generated in the holding member 200 are suppressed, and the adhesion between the rib 210 and the V-groove 110 is improved, which contributes to the improvement in sound quality of the recorded sound.

---- Modified example ---
(1) In the above description, as shown in FIGS. 4 and 10 and FIG. 11A, the V-groove 110 is composed of the first inclined surface 111, the second inclined surface 112, and the valley surface 113. It is not limited to. For example, as shown in FIG. 11B, the valley surface 113 may not be provided. Further, the shape of the front end 211 of the rib 210 is not limited to a curved surface, and may be a flat surface (front end 212) as shown in FIG.

(2) In the above description, the holding member 200 is provided with the ribs 210 that are convex portions, and the cover 1 is provided with the V grooves 110 that are concave portions. However, as shown in FIG. The V groove 230 may be provided, and the cover 130 may be provided with the ribs 130 that are convex portions. In addition, when comprised in this way, since the rib 130 is formed with the same hard material (metal, resin) as the cover 1, the intensity | strength of the rib 130 is high. Therefore, the rib 130 is not easily deformed as compared with the rib 210 of the embodiment shown in FIG. 4 and the like, so that the rib 130 is not inadvertently deformed, and the rib 130 and the V-groove 230 are more reliably brought into contact with each other. be able to. Further, the possibility that the rib 130 and the V groove 230 are displaced is low.

(3) In the above description, the noise generation source inside the digital camera 100 is an optical system drive mechanism such as the drive mechanism 40. For example, a digital drive equipped with a DVD drive or a hard disk drive as image data recording means. In the camera, the drive mechanism of these drives becomes a noise generation source. Even in this case, as described above, noise generated inside the digital camera 100 can be blocked by the holding member 200 and the contact portion between the rib 210 and the V groove 110.

(4) In the above description, rubber materials such as silicone rubber and ethylene propylene rubber (EPDM) are used as the material of the holding member 200. However, various elastic materials such as rubber materials other than these and elastomers other than rubber materials are used. The body may be used.

(5) In the above description, the present invention is described as an example applied to a digital camera, but the present invention is not limited to this. The present invention can be applied to various electronic devices such as a portable information terminal, and any device that collects sound with a microphone provided in a housing, and has the same effects as the above-described effects.
(6) The above-described embodiments and modifications may be combined.

  The present invention is not limited to the above-described embodiment, and includes a microphone and an elastic member. The microphone has an opening on the front surface of the sound collection surface, and holds the microphone to be attached to the housing. A concave portion is provided in one of the holding member and the housing, and a convex portion is provided in either one of the holding member and the first surface of the concave portion when the holding member is pressed toward the housing. The electronic device includes various structures in which the convex portions abut on each of the second surfaces different from the first surface.

1 is a front view of a digital camera 100. FIG. It is II-II arrow sectional drawing of FIG. FIG. 4 is a diagram showing a drive mechanism 40. 1IV is a cross-sectional view taken along the line IV-IV. It is the figure which showed the cover 1 of FIG. It is a perspective view of the vicinity of the microphone hole 4 when the cover 1 is seen from the back side. It is a side view of the microphone 5. FIG. 3 is a cross-sectional view of a holding member 200. FIG. It is the perspective view which looked at the holding member 200 from diagonally forward. FIG. 4 is a diagram showing a contact state between a front end 211 of a rib 210 and a V groove 110. It is a figure which shows a modification. It is a figure which shows a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover 5 Microphone 9 Battery box 100 Digital camera 110,230 V groove 111 1st slope 112 2nd slope 130,210 Rib 200 Holding member 201 Opening 211,212,213 Front end

Claims (7)

Imaging means provided in the housing;
With a microphone,
An elastic member, having an opening in front of the sound collection surface of the microphone, and a holding member that holds the microphone and attaches to the housing;
A concave portion is provided on one of the holding member and the housing, and a convex portion is provided on the other,
The camera according to claim 1, wherein when the holding member is pressed toward the housing, the convex portion comes into contact with each of a first surface of the concave portion and a second surface different from the first surface. The camera according to claim 1,
The holding member is provided with the convex portion,
The camera, wherein the housing is provided with the recess. The camera according to claim 1,
The holding member is provided with the recess,
The camera, wherein the housing is provided with the convex portion. The camera according to any one of claims 1 to 3,
The convex portion or the concave portion provided in the holding member is provided around the opening,
2. The camera according to claim 1, wherein when the holding member is pressed toward the housing, the convex portion comes into contact with each of the first surface and the second surface of the concave portion over the entire circumference. In the camera according to any one of claims 1 to 4,
The camera further comprising a pressing member that presses the holding member toward the housing. The camera according to claim 5, wherein
The pressing member abuts in the vicinity of a contact portion between the convex portion and the concave portion when the holding member and the housing are viewed from the pressing member side, and presses the holding member. Camera. With a microphone,
An elastic member, having an opening in front of the sound collection surface of the microphone, and a holding member that holds the microphone and attaches to the housing;
A concave portion is provided on one of the holding member and the housing, and a convex portion is provided on the other,
When the holding member is pressed toward the housing, the convex portion comes into contact with each of the first surface of the concave portion and the second surface different from the first surface.

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