JP2013037163A - Attachment, attachment mounting system, and attachment mounting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system using a magnetic substance for mounting an attachment on a device body, which protects the magnetic substance when handling the attachment and protects the device body.SOLUTION: An attachment 2 is mounted on a device body 1 when being used. The attachment includes a movable magnetic substance 24 that is incorporated in the mounting surface side for the device body 1 so as to be movable in the mounting direction; and a first attraction material 26 that attracts the movable magnetic substance 24 to an opposite side of the mounting surface side. When the attachment 2 is not mounted on the device body 1, the movable magnetic substance 24 is attracted to the opposite side of the mounting surface side by the first attraction material 26, however, when the attachment 2 is mounted on the device body 1, the movable magnetic body 24 is attracted to a second attraction material 14 provided on the mounting surface of the device body 1.

Description

  The present invention relates to an attachment to be mounted on a camera or the like, a mounting system for the attachment, and a mounting method.

For example, a screw-type mount, bayonet-type mount, spigot type, or the like is generally used as a structure in which an optical component such as a lens barrel or a conversion lens can be attached to and detached from the camera body.
On the other hand, as an attachment for changing the focal length of a lens in an imaging apparatus such as a digital camera, a wide conversion lens and a teleconversion lens are known, and a fisheye lens and a 3D lens are provided as additional functions.
When these conversion lenses are attached to the imaging apparatus, focus control, image processing, or the like may need to be changed. For this reason, an imaging device is often provided with a mechanism for detecting whether or not a conversion lens is attached.
There are a mechanical method and an electrical method for detecting the wearing of the conversion lens.
As a mechanical method, there is a method in which when a conversion lens is attached to the imaging apparatus, a detection claw provided in the imaging apparatus is pressed.
As an electrical method, there is a method of automatically detecting the wearing of a telecon by detecting the occurrence of vignetting based on the luminance of pixels at the four corners of the imaging screen.

A method of mounting an interchangeable lens with a magnet in a camera is proposed in Patent Document 1.
Also, Patent Document 2 proposes a method of attaching attachments such as an interchangeable lens and various filters with a magnet in a mobile phone camera.

JP-A-8-227096 JP 2007-206137 A

  However, all of the conventional techniques are based on the premise that the entire optical unit (lens) is replaced from the camera, and the main body structure with the optical unit removed is not considered in appearance.

And in order to obtain the attractive force of the camera and the conversion lens, it is necessary to make the magnet mounted on the conversion lens side the outermost surface. In that case, there is a problem that the magnet is damaged when the conversion lens is dropped. is there.
There is also a problem that the oil of the hand holding the conversion lens adheres to the magnet.
Therefore, as a method of obtaining the attractive force without making the magnet on the conversion lens side the outermost surface, for example, a method of mounting magnets on the camera side and pulling them with each other can be considered, but in that case, around the lens of the camera A magnet is disposed, which may adversely affect the lens motor.
In addition, there is a problem that dust such as iron sand adheres to the magnet arranged in the camera.

  The subject of this invention is protecting the magnetic body at the time of handling an attachment, and also protecting an apparatus main body in the system which uses a magnetic body in order to mount | attach an attachment to an apparatus main body.

  In order to solve the above problems, the present invention is an attachment that is used by being mounted on a device main body, and is provided on a mounting surface side with respect to the device main body, a movable magnetic body that is movably incorporated in the mounting direction, and the movable A first adsorbent that adsorbs the magnetic body to the side opposite to the mounting surface side, and in a state where the attachment is not mounted on the apparatus main body, the movable magnetic body is moved by the first adsorbent. While being attracted to the side opposite to the mounting surface side, the movable magnetic body is attracted to the second adsorbent provided on the mounting surface of the apparatus body when the attachment is mounted on the apparatus body. It is characterized by.

According to the present invention, it is possible to prevent damage to the magnetic body from an impact such as dropping or suddenly hitting the attachment when the user handles the attachment, and it is also possible to prevent the oil of the hand holding the attachment from adhering to the magnetic body. it can.
In addition, there is no fear of adversely affecting the electronic components of the apparatus main body, and it is possible to prevent dust such as iron sand from attaching to the apparatus main body.

It is a perspective view which shows the structure of one Embodiment of the apparatus main body which mounts | wears with the attachment to which this invention is applied. The state which attached the attachment to the main part of an apparatus is shown, and it is a top view (a) and the longitudinal section side view (b). It is a principal part enlarged view of FIG.2 (b). It is the perspective view (a) which looked at the attachment from the upper part, and the figure (b) seen from the downward direction. It is the top view (a) of an attachment, and its vertical side view (b). It is a principal part enlarged view of FIG.5 (b). It is an expanded sectional view similar to FIG. 3 which shows the moment of attachment mounting | wearing.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment)
FIG. 1 shows a camera 1 as an apparatus body to which an attachment is attached. A front case 11 of the camera 1 is provided with an attachment groove 13 for attaching an attachment around a lens 12 as shown in the figure. Yes. A magnetic body 14 as an adsorbent is disposed on the bottom surface of the mounting groove 13.

2A and 2B show a state where a conversion lens 2 as an attachment is attached to the camera 1, FIG. 2A is a plan view, and FIG. 2B is a longitudinal side view.
FIG. 3 is an enlarged view of the main part of FIG.

Here, the camera 1 has a function as a camera even without a conversion lens, and has another optical function such as fisheye or 3D by wearing the conversion lens 2.
Therefore, the camera 1 has a finished appearance and shape that is a product even when the conversion lens 2 is not attached.

4A and 4B show the conversion lens 2. FIG. 4A is a perspective view seen from above, and FIG. 4B is a view seen from below.
FIG. 5A is a plan view of the conversion lens 2, and FIG. 5B is a longitudinal side view thereof.

As shown in the drawing, the conversion lens 2 is covered with a case 21 around the lens 22.
The base end portion of the case 21 around the lens 22 is an insertion portion 23 that is inserted into the mounting groove 13 of the camera 1.
Inside the insertion portion 23, as shown in FIG. 4B, magnets 24, which are arc-shaped magnetic bodies, are provided along the direction in which the conversion lens 2 is attached to the camera 1. It is built in movably.

Further, as shown in an enlarged view in FIG. 6, a magnetic body 26 as an adsorbing material is built in the insertion portion 23 by interposing a spacer 25 with a resin wall as a buffer material on the magnet 24. Has been.
Here, the magnet 24, the spacer 25, and the magnetic body 26 are incorporated in a tapered groove 27 formed through the insertion portion 23 in the vertical direction as illustrated.

That is, the taper groove 27 is formed in a cross-sectional shape in which the inner peripheral side is a vertical wall, the outer peripheral side is an inclined wall, and the width gradually decreases downward.
In the taper groove 27, a magnet 24 having a cross-sectional shape that becomes narrower downward corresponding to the taper shape of the substantially lower half is movably disposed. A spacer 25 having a cross-sectional shape that narrows downward corresponding to each tapered shape and a magnetic body 26 thereon are fixedly disposed in a substantially upper half of the tapered groove 27.

  In the above, the magnet 24 built in the insertion portion 23 of the case 21 of the conversion lens 2 has a tapered groove 27 as shown in FIGS. Inside, the spacer 25 is sandwiched and attracted to the magnetic body 26 thereabove, and is recessed in the tapered groove 27 from the outermost appearance surface at the lower end of the insertion portion 23.

  When the conversion lens 2 is attached to the camera 1, the insertion portion 23 of the conversion lens 2 is inserted into the attachment groove 13 of the camera 1.

  FIG. 7 is an enlarged cross-sectional view showing the moment when the conversion lens 2 is attached to the camera 1.

As shown in the figure, the distances between the magnet 24 and the magnetic body 26 at the moment when the insertion portion 23 of the case 21 of the conversion lens 2 is inserted into the mounting groove 13 of the camera 1 and the magnetic body 14 of the mounting groove 13 are t1, t2, respectively. And the forces applied to the magnet 24 in the direction of the magnetic body 26 and the magnetic body 14 of the mounting groove 13 are denoted by f1 and f2, respectively.
By setting t1 >> t2, f1 <f2, and the magnet 24 is attracted to the magnetic body 14 of the mounting groove 13 as shown in FIGS. 2B and 3, so that the conversion lens 2 and the camera 1 are connected. Combined.

Further, by using a material having stronger magnetism for the magnetic body 14 of the camera 1 than the magnetic body 26 of the conversion lens 2, it becomes easier to realize f1 <f2.
For example, the magnetic body 26 is SUS403, while the magnetic body 14 is iron.

  In the tapered groove 27 in which the magnet 24 and the magnetic body 26 of the case 21 of the conversion lens 2 are arranged, as shown in FIG. Since the inclined wall is attached, the magnet 24 does not come off the conversion lens 2.

  When the conversion lens 2 is pulled away from the camera 1, the magnet 24 is attracted to the magnetic body 26 and returns to the state shown in FIG.

As described above, the camera 1 and the conversion lens 2 can be easily attached and detached with the magnet 24.
In addition, even when the conversion lens 2 is not attached, the camera 1 is not damaged in appearance, so that the product value is not impaired even when the camera 1 is used alone.

  In the method of using the magnet 24 to attach the conversion lens 2 to the camera 1, the conversion lens 2 is slid by sliding the magnet 24 on the conversion lens 2 side without mounting a magnet on the camera 1 side. When mounted on 1, the magnet 24 becomes the outermost surface and strongly adsorbs to the magnetic body 14 on the camera 1 side. When not mounted, the magnet 24 becomes lower than the outermost surface, so that Damage to the magnet 24 can be prevented from impact.

That is, when the conversion lens 2 is not attached to the camera 1, the magnet 24 is recessed in the taper groove 27 from the outermost appearance surface, so that the user falls or unexpectedly bumps when the conversion lens 2 is handled. It is possible to prevent the magnet 24 from being damaged from the impact, and to prevent the oil of the hand holding the conversion lens 2 from adhering to the magnet 24.
Moreover, since the slide structure of the magnet 24 of the conversion lens 2 is realized without mounting a magnet on the camera 1 side, there is no fear of adversely affecting the lens motor of the camera 1, and the camera 1 is made of iron sand or the like. It is possible to prevent trash from sticking.

(Modification)
In the embodiment, the magnet 24 built in the conversion lens 2 is attracted by the magnetic body 26, but the magnet 24 may be attracted by a spring instead of the magnetic body 26.
In this case, the spring sets the attracting force that attracts the magnet 24 from the magnetic body 14 of the mounting groove 13 of the camera 1 to be weak.
Thus, if the adsorbent is a spring, the cost can be reduced.

In the embodiment, the three arc-shaped magnets 24 are used. However, the number of magnets may be two, four or more, or one donut shape.
Furthermore, in the embodiment, the spacer 25 is provided as a cushioning material between the magnet 24 and the magnetic body 26, but a stopper may be provided as a space without providing the spacer.
Further, the relationship between the magnet and the magnetic body may be reversed from that in the embodiment.
Moreover, it is good also as a structure which incorporates the movable magnet in the apparatus main body side.

(Other variations)
In the above embodiment, the camera is used. However, the present invention is not limited to this, and may be another electronic device such as a mobile phone including the camera.
Furthermore, in the embodiment, the conversion lens is used, but other attachments such as a filter may be used.

Moreover, although it was set as the magnet in embodiment, the magnetic body with which the magnet was incorporated may be sufficient.
Furthermore, the number and shape of magnets, magnetic bodies and adsorbents, the shape of grooves, etc. are arbitrary, and it is needless to say that specific detailed structures and the like can be appropriately changed.

As mentioned above, although several embodiment of this invention was described, the scope of the present invention is not limited to the above-mentioned embodiment, The range of the invention described in the claim, and its equivalent range Including.
The invention described in the scope of claims attached to the application of this application will be added below.
The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
An attachment to be used by attaching to the device body,
On the mounting surface side with respect to the apparatus main body, a movable magnetic body movably incorporated in the mounting direction;
A first adsorbent that adsorbs the movable magnetic body on the side opposite to the mounting surface;
In a state where the attachment is not attached to the apparatus main body, the movable magnetic body is attracted to the side opposite to the attachment surface side by the first adsorbent,
In the state where the attachment is mounted on the apparatus main body, the movable magnetic body is attracted to a second adsorbent provided on the mounting surface of the apparatus main body.
<Claim 2>
The attachment according to claim 1, wherein the first adsorbent and the second adsorbent are magnetic materials.
<Claim 3>
The attachment according to claim 2, wherein the magnetic body of the first adsorbent has a lower magnetic force to adsorb the movable magnetic body than the magnetic body of the second adsorbent.
<Claim 4>
The attachment according to claim 2, wherein a spacer is disposed between the movable magnetic body and the magnetic body of the first adsorbent.
<Claim 5>
The attachment according to claim 4, wherein the spacer is a cushioning material.
<Claim 6>
The attachment according to claim 1, wherein the first adsorbent is a spring.
<Claim 7>
The attachment according to claim 6, wherein the spring of the first adsorbent has a weaker adsorbing force for adsorbing the movable magnetic body than the magnetic body of the second adsorbent.
<Claim 8>
The movable magnetic body is formed in a cross-sectional shape that narrows toward the mounting surface side in accordance with an insertion portion having a cross-sectional shape that narrows toward the mounting surface side of the built-in apparatus main body. The attachment according to claim 1.
<Claim 9>
The device body is an imaging device,
The attachment according to any one of claims 1 to 8, wherein the attachment is a conversion lens or a filter.
<Claim 10>
The attachment according to any one of claims 1 to 9,
An attachment mounting system comprising: an apparatus main body provided with an adsorbent that adsorbs the movable magnetic body on a mounting surface on which the attachment is mounted.
<Claim 11>
The apparatus main body includes an imaging unit having a lens capable of imaging even when the attachment is not attached,
The attachment mounting system according to claim 10, wherein the attachment mounting system is a housing of an imaging apparatus capable of changing optical characteristics of the lens by mounting the attachment.
<Claim 12>
The attachment according to any one of claims 1 to 9 is overlaid on a mounting surface of a device main body, the movable magnetic body is attracted to the second adsorbent, and the attachment is held in the device main body. An attachment mounting method characterized by:
<Claim 13>
In the attachment state of the attachment to the device body,
The attachment mounting method according to claim 12, wherein the attachment of the movable magnetic body to the second adsorbent is released by pulling the attachment with respect to the apparatus main body.

DESCRIPTION OF SYMBOLS 1 Camera 13 Mounting groove 14 Adsorbent 2 Conversion lens 23 Insertion part 24 Magnet 25 Spacer 26 Magnetic body 27 Tapered groove

Claims (13)

An attachment to be used by attaching to the device body,
On the mounting surface side with respect to the apparatus main body, a movable magnetic body movably incorporated in the mounting direction;
A first adsorbent that adsorbs the movable magnetic body on the side opposite to the mounting surface;
In a state where the attachment is not attached to the apparatus main body, the movable magnetic body is attracted to the side opposite to the attachment surface side by the first adsorbent,
In the state where the attachment is mounted on the apparatus main body, the movable magnetic body is attracted to a second adsorbent provided on the mounting surface of the apparatus main body.   The attachment according to claim 1, wherein the first adsorbent and the second adsorbent are magnetic materials.   The attachment according to claim 2, wherein the magnetic body of the first adsorbent has a lower magnetic force to adsorb the movable magnetic body than the magnetic body of the second adsorbent.   The attachment according to claim 2, wherein a spacer is disposed between the movable magnetic body and the magnetic body of the first adsorbent.   The attachment according to claim 4, wherein the spacer is a cushioning material.   The attachment according to claim 1, wherein the first adsorbent is a spring.   The attachment according to claim 6, wherein the spring of the first adsorbent has a weaker adsorbing force for adsorbing the movable magnetic body than the magnetic body of the second adsorbent.   The movable magnetic body is formed in a cross-sectional shape that narrows toward the mounting surface side in accordance with an insertion portion having a cross-sectional shape that narrows toward the mounting surface side of the built-in apparatus main body. The attachment according to claim 1. The device body is an imaging device,
The attachment according to any one of claims 1 to 8, wherein the attachment is a conversion lens or a filter. The attachment according to any one of claims 1 to 9,
An attachment mounting system comprising: an apparatus main body provided with an adsorbent that adsorbs the movable magnetic body on a mounting surface on which the attachment is mounted. The apparatus main body includes an imaging unit having a lens capable of imaging even when the attachment is not attached,
The attachment mounting system according to claim 10, wherein the attachment mounting system is a housing of an imaging apparatus capable of changing optical characteristics of the lens by mounting the attachment.   The attachment according to any one of claims 1 to 9 is overlaid on a mounting surface of a device main body, the movable magnetic body is attracted to the second adsorbent, and the attachment is held in the device main body. An attachment mounting method characterized by: In the attachment state of the attachment to the device body,
The attachment mounting method according to claim 12, wherein the attachment of the movable magnetic body to the second adsorbent is released by pulling the attachment with respect to the apparatus main body.

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