JP2016136166A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device capable of preventing positional displacement of lens when being dropped or an external force is applied thereto.SOLUTION: A digital camera body 100 has a flange reinforcement part 151a around a mount ring 151. The flange reinforcement part 151a and a front outer case 101 of a housing are fixed to each other using a screw 102. With this, a force which is transmitted from the mount ring 151 to a boss 251 can be reduced and capable of when digital camera body is dropped in a front direction or when an external force is applied, preventing a lens position deviation.SELECTED DRAWING: Figure 6

Description

  The present disclosure relates to a structure of a fixing unit for mounting a lens in an imaging apparatus such as a digital camera.

  Image pickup devices such as interchangeable lens digital cameras tend to move the center of gravity at the time of lens mounting to the lens side due to the increase in lens weight accompanying the increase in the size of the image sensor and the downsizing and thinning of the image pickup device. It is in. For this reason, the load applied to the mount portion for fixing the lens becomes large, and the lens position is liable to occur. In particular, when dropped, there is a high possibility that the lens unit will collide with the floor surface, and the stress concentration on the upper part of the mount unit will increase.

  Patent Document 1 discloses an imaging apparatus having a structure in which a reinforcing member is mounted in front of the mount portion in order to suppress deformation of the mount portion due to external force. Thereby, weight reduction can be achieved, suppressing the deformation | transformation by external force.

JP 2010-243634 A

  However, in the structure of Patent Document 1, since there are many restrictions on the shape because it is related to the appearance design, and a reinforcing member is added in front of the mount part, the center of gravity moves to the lens side, and the lens part is lowered when dropped. There was a problem that the upper part of the mount part was likely to be deformed by colliding with the floor surface.

  Therefore, the present disclosure solves this problem, and an object of the present disclosure is to provide an imaging device that is effective in suppressing external position addition and lens position shift when dropped.

  An imaging apparatus according to an embodiment of the present disclosure includes a lens mount portion for fixing a lens unit, a mount base for fixing the lens mount portion in a housing, and a flange reinforcing portion on an outer periphery of the lens unit fixing portion of the lens mount portion. With.

In the imaging device according to the present disclosure, it is preferable that the flange reinforcing portion of the lens mount portion is fixed to an exterior portion of the housing.

  The imaging device according to the present disclosure has a simple structure and is effective in suppressing external position addition and lens position shift when dropped.

Overall schematic diagram of digital camera with lens unit attached Overall schematic diagram of the digital camera body The figure which shows the cross section of the up and down direction on the optical axis of the digital camera body Cross-sectional view of the mounting area in the prior art Sectional view near mount portion and overall view of mount ring in embodiment 1 Sectional view near mount portion and overall view of mount ring in embodiment 1 The figure which shows the fall attitude | position of the digital camera in Embodiment 2 Overall view of mount ring in embodiment 2

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  In addition, the inventors provide the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and these are intended to limit the subject matter described in the claims. is not.

(Embodiment 1)
The first embodiment will be described below with reference to FIGS.

  FIG. 1 is a perspective view of a digital camera 1 (an example of an imaging apparatus) according to the first embodiment. FIG. 2 is a perspective view of the camera body 100.

  Details of each part will be described below.

  For convenience of explanation, the subject side of the digital camera 1 is front, the imaging surface side is rear or back, the vertical upper side in the normal posture of the digital camera 1 (hereinafter also referred to as horizontal shooting posture) is upper or upper, and the vertical lower side. The side is also called the lower side or the lower side.

  Here, the landscape orientation means that the direction parallel to the long side of the image that is a horizontally long rectangle matches the horizontal direction of the subject in the image, and the direction parallel to the short side of the image is the subject in the image. The direction in which the release button 110 (FIG. 1) is pressed at the time of shooting generally coincides with the vertically downward direction.

  Further, the right side when the digital camera 1 is viewed from the side opposite to the subject in the horizontal shooting posture of the digital camera 1 is referred to as the right or right side. Similarly, the left side when the digital camera 1 is viewed from the side opposite to the subject in the horizontal shooting posture of the digital camera 1 is referred to as the left or the left side.

Further, the vertical direction in the horizontal shooting posture of the digital camera 1 is referred to as an up-down direction or a vertical direction. Similarly, the left-right direction in the horizontal shooting posture of the digital camera 1 is referred to as a left-right direction or a horizontal direction.
Also, the vertical direction and the direction perpendicular to the horizontal direction coincide with the front-rear direction, the direction facing the subject is called the front direction, and the direction opposite to the front direction is called the rear direction.

  In the following, a three-dimensional coordinate axis is set as shown in FIG. In FIG. 1, the X-axis direction coincides with the front-rear direction, the Y-axis direction coincides with the left-right direction, and the Z-axis direction coincides with the up-down direction. Further, the coordinate axes described in the drawings other than FIG. 1 are based on the three-dimensional coordinate axes set in FIG.

  The digital camera 1 is an interchangeable lens type digital camera for acquiring an image of a subject, and includes a camera body 100 and a lens unit 200 that can be attached to the camera body 100. The lens unit 200 is fixed to the mount ring 151 shown in FIG. 2, and the positional relationship with the camera body 100 is determined.

  The mount ring 151 is disposed in a circular opening of the front exterior 101 of the housing, and is connected and fixed to the mount base 152. On the back side of the mount base 152, there is a shutter unit 190 and a diaphragm 153 that prevents dust from adhering, and an image sensor (not shown) is arranged in the camera body on the back side.

  On the upper surface of the camera body 100, a release button 110, an operation lever 111, an electronic viewfinder 120, and the like are arranged.

  4 to 6 are schematic views of the internal structure in the cross section on the optical axis AX parallel to the vertical direction of the camera body, as shown in the A-A 'cross section of FIG. In order to show the characteristics of the present invention, the front side of the image sensor 191 is shown.

  FIG. 4 is a schematic diagram of an internal structure near the mount portion in the prior art, and FIGS. 5 and 6 are a cross-sectional view near the mount portion and an overall view of the mount ring in the first embodiment. In the prior art, since the mount ring 151 is fixed only to the mount base 152, the load is applied to the mount ring 151 and the fixing boss 252 in the state where the lens unit 200 is mounted as shown in FIG. There is a problem that the boss 251 and the mount base 152 are easily deformed when the lens is dropped or an external force is applied, and the lens position is easily displaced.

   On the other hand, in the first embodiment, a flange reinforcing portion 151a is provided around the mount ring 151, and the flange reinforcing portion 151a and the front exterior 101 are fixed using screws 102, so The force transmitted from the mount ring 151 to the boss 251 when an external force is applied can be reduced, and the lens position shift can be suppressed.

The shape of the flange reinforcing portion 151a of the mount ring 151 is preferably formed along the shape of the front exterior 101 as shown in FIGS. 5 (b) and 6 (b). As a result, the mount ring 151 is integrated with the front exterior 101 and rigidity can be improved.
(Embodiment 2)
The second embodiment will be described below with reference to FIGS.
Since the basic configuration of the digital camera 1 is the same as that of the first embodiment, the description thereof is omitted.

  FIG. 7 shows a drop posture that is likely to occur in a digital camera when the large lens unit 200a is attached. When the large lens unit 200a is mounted, since the center of gravity moves forward, there is a high probability that the lens unit 200a will collide with the floor surface when dropped.

  In such a drop posture, stress concentration occurs in the region B above the mount, and the lens position shift due to deformation tends to occur.

  Therefore, as shown in FIG. 8, a flange reinforcing portion 151b is provided on the upper portion of the mount ring 151, and the flange reinforcing portion 151b and the front exterior 101 are fixed using screws 102 as shown in FIGS. 5 (a) and 6 (a). By doing so, it is possible to reduce stress concentration in the region B above the mount. Accordingly, it is possible to suppress the positional deviation of the lens when dropped.

Further, by providing the flange reinforcing portion 151b only in a region having a large effect, there is an advantage that the shape can be simplified and the weight can be reduced.
As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.

  Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

  Moreover, since the above-mentioned embodiment is for demonstrating the technique in this indication, a various change, replacement, addition, abbreviation, etc. can be performed in a claim or its equivalent range.

  The present disclosure is applicable to an imaging apparatus such as a digital camera.

DESCRIPTION OF SYMBOLS 100 Digital camera main body 101 Front exterior 102 Fixing screw 110 Release button 111 Operation lever 120 Electronic viewfinder 151 Mount ring 151a, 151b Flange reinforcement part 152 Mount base 153 Diaphragm 190 Shutter unit 191 Imaging element 200, 200a Lens unit 251 Boss

Claims (2)

A lens mount for fixing the lens unit;
A mount base for fixing the lens mount portion in the housing;
An image pickup apparatus comprising a flange reinforcing portion on an outer periphery of a lens unit fixing portion of the lens mount portion.   The imaging apparatus according to claim 1, wherein the flange reinforcing portion of the lens mount portion is fixed to an exterior portion of the housing.