WO2013190985A1

WO2013190985A1 - Conversion lens unit and image pick-up device

Info

Publication number: WO2013190985A1
Application number: PCT/JP2013/065326
Authority: WO
Inventors: 立山忠生
Original assignee: コニカミノルタ株式会社
Priority date: 2012-06-22
Filing date: 2013-06-03
Publication date: 2013-12-27
Also published as: JPWO2013190985A1

Abstract

Provided are a conversion lens unit and an image pick-up device that inhibit the adherence of debris, scratches, and user finger oil onto the optical surface of an incident luminous flux side and emission luminous flux side thereby enabling a high-quality image to be obtained. In a state where a housing (301) is retracted from above a master lens (101), a first opening (301a) and a second opening (301b) become blocked and thus a lens (La) that is closest to the object side of a conversion lens (302) is not exposed through the first opening (301a) and also a lens (Lb) closest to the image side is not exposed through the second opening (301b); therefore, scratching and contamination of the lenses can be inhibited.

Description

Conversion lens unit and imaging apparatus

The present invention relates to a conversion lens unit, and more particularly, to a conversion lens unit and an image pickup apparatus having a conversion lens that is mounted in front of a master lens provided in an image pickup apparatus or the like and changes a shooting angle of view.

In recent years, mobile terminals such as smartphones have been released and are expanding rapidly. Such a portable terminal is generally mounted with an imaging device, and is used in various ways such as transferring an image captured by the imaging device or performing image processing on the portable terminal. However, since a general portable terminal is thin, an imaging device incorporated therein is strictly required to be compact. For this reason, a wide-angle single-focus optical system is generally mounted, and some users have various demands such as wanting to take a wider image, or taking a larger image of a distant subject.

On the other hand, in Patent Document 1, in order to give a close-up function to a mobile phone with a digital camera, the lens barrel of the close-up lens can be attached to the body of the mobile phone, and the position where the master lens is exposed during normal shooting. In the close-up photography, a close-up lens can be slid to a position facing the master lens. For video camera applications, Patent Document 2 discloses a technique for sliding a conversion lens so that it can be inserted and removed in front of a zoom lens of the video camera body.

JP 2005-278034 A Japanese Patent Laid-Open No. 04-55809

Here, in the configuration of Patent Document 1, since the close-up lens attached to the mobile phone is always exposed, dust, scratches, oil of user's fingers touching carelessly, etc. may adhere to the optical surface, There is a risk of image quality degradation. Further, when the lens barrel is removed from the mobile phone, the optical surface facing the mobile phone side is also exposed, and there is a risk that dust, scratches, oil on the user's fingers, and the like may also adhere.

On the other hand, in the configuration of Patent Document 2, the conversion lens is slid inside the cover attached to the video camera body. However, since the opening of the cover is always open, dust and foreign matter intrude from here and conversion is performed. There is a risk of adhering to the optical surface of the lens.

The present invention has been made in view of such a problem, and suppresses adhesion of dust, scratches, oil of a user's finger, etc. to the two optical surfaces of the conversion lens on the incident light beam side and the emitted light beam side. An object of the present invention is to provide a conversion lens unit and an imaging apparatus that can acquire high-quality images.

The conversion lens unit according to claim 1, wherein the conversion lens unit includes a conversion lens that is disposed closer to the subject than the master lens of the imaging device and changes a shooting angle of view.
A housing that accommodates the conversion lens and includes a first opening that exposes the optical element closest to the object side of the conversion lens and a second opening that exposes the optical element closest to the image side of the conversion lens When,
It has the 1st barrier member which can shield the 1st opening part of the said housing | casing, and the 2nd barrier member which can shield the 2nd opening part of the said housing | casing, It is characterized by the above-mentioned.

According to the present invention, the first barrier member capable of shielding the first opening of the casing and the second barrier member capable of shielding the second opening of the casing are provided. By retracting one barrier member from the first opening and retracting the second barrier member from the second opening, subject light is incident on the master lens via the conversion lens, while non-photographing When the conversion lens is not used, such as when the conversion lens unit is removed, the first opening is shielded by the first barrier member, and the second opening is shielded by the second barrier member. Thus, scratches and contamination of the two optical surfaces of the conversion lens on the incident light beam side and the outgoing light beam side can be suppressed. The “conversion lens” refers to a lens that changes the shooting angle of view by being arranged on the optical axis of the master lens, and includes all of a tele conversion lens, a wide conversion lens, and a zoom conversion lens. The “imaging device” refers to a device having at least a master lens and an imaging element. Examples of the “imaging device” include portable terminals such as a mobile phone and a smartphone.

The conversion lens unit according to claim 2 is the invention according to claim 1, wherein the conversion lens unit includes an attachment member for attaching the housing to the imaging device, By sliding the housing, the conversion element where the optical element closest to the image side of the conversion lens faces the master lens, and the conversion lens retracts from the master lens and can be photographed only with the master lens. It is possible to move between the conversion positions.

According to the present invention, by sliding the housing with respect to the mounting member, a conversion position where the optical element closest to the image side of the conversion lens faces the master lens, and the conversion lens from the master lens Since it can move between a non-conversion position where it can be retracted and only the master lens can be photographed, normal photographing using only the master lens and only the master lens via the conversion lens can be used. It is possible to easily select shooting with a different angle of view.

The conversion lens unit according to claim 3 is the invention according to claim 2, wherein, in the conversion position, the first barrier member retracts from the first opening to open the first opening, and The second barrier member is retracted from the second opening to open the second opening.

In the conversion position, the first barrier member retreats from the first opening to open the first opening, and the second barrier member retreats from the second opening to open the second opening. Since it is opened, the first opening and the second opening are opened in association with this by sliding the housing with respect to the mounting member to be in the conversion position, and annoying the photographer. In addition, it is possible to shoot at a different angle of view from that of the master lens alone.

The conversion lens unit according to claim 4 is characterized in that, in the invention according to claim 2 or 3, the first barrier member shields the first opening at the non-conversion position.

When the non-conversion position is taken by sliding the housing with respect to the mounting member, the first opening is shielded in conjunction with this, so that when shooting without using the conversion lens unit, the first Scratches and contamination of the optical element on the opening side can be suppressed. In the state where the conversion lens unit is attached to the image pickup apparatus, the second opening side is covered with the attachment member, so that there is no particular problem even when the second opening is open.

The conversion lens unit according to claim 5 is the invention according to claim 4, wherein the casing is configured to be removable from the attachment member, and when the casing is detached from the attachment member, the second The barrier member shields the second opening.

When the casing is removed from the mounting member, the second opening is shielded in conjunction with this, so that damage and contamination of the optical element on the second opening side of the conversion lens can be suppressed.

According to a sixth aspect of the present invention, in the conversion lens unit according to the fourth aspect, the second barrier member shields the second opening when the attachment member is detached from the imaging device together with the housing. It is characterized by.

When the attachment member is removed from the image pickup apparatus together with the housing, the second opening is shielded in conjunction with this, so that the optical element on the second opening side of the conversion lens is damaged or contaminated. Can be suppressed.

The conversion lens unit according to claim 7 is the conversion lens unit according to claim 2 or 3, wherein, in the non-conversion position, the first barrier member shields the first opening, and the second barrier member is the The second opening is shielded.

By sliding the housing with respect to the mounting member to take the non-conversion position, the first opening and the second opening are shielded in conjunction with this, so the first of the conversion lens Scratches and contamination of the optical elements on the opening side and the second opening side can be suppressed.

The conversion lens unit according to claim 8 is the invention according to any one of claims 3, 4, and 7, wherein the first barrier member and the second barrier member are interlocked with the slide of the casing. The first opening and the second opening are shielded.

It is preferable that the first opening and the second opening are shielded in conjunction with sliding the casing with respect to the mounting member.

The conversion lens unit according to claim 9 is the invention according to claim 1 or 2, wherein the first barrier member is configured such that the first opening is formed by an operation member regardless of the conversion position and the non-conversion position. It is configured to be shieldable and openable.

By configuring the first opening so as to be able to be shielded and opened by the operation member, the first opening can be shielded when shooting is not performed even when the conversion lens unit is in the conversion position, and the optical element on the first opening side. Scratch and contamination can be suppressed.

A conversion lens unit according to a tenth aspect of the present invention is the conversion lens unit according to any one of the second to ninth aspects, wherein the conversion lens is configured by a bending optical system, and the casing is in a longitudinal direction of the bending optical system or the casing. It slides in the direction orthogonal to the longitudinal direction.

Since the conversion lens unit can be installed along the front surface of the imaging apparatus by configuring the conversion lens from a bending optical system, it is less likely to be an obstacle when shooting or carrying. This is particularly effective when the imaging device is thin, such as a portable terminal. Further, since there is often a space in the longitudinal direction of the bending optical system or in a direction along the direction perpendicular to the longitudinal direction, it is convenient to slide the casing in this direction.

The conversion lens unit according to claim 11 is the conversion lens unit according to claim 10, wherein the outer surface on the master lens side is a slope so that the casing does not block the incident light beam to the master lens at the non-conversion position. It is formed.

The slide movement amount between the conversion position and the non-conversion position can be reduced by forming the outer surface of the casing on the master lens side as a slope.

A conversion lens unit according to a twelfth aspect of the present invention is the conversion lens unit according to any one of the second to eleventh aspects, wherein the imaging device has a light source that emits auxiliary light, and the housing is at the conversion position. And a light guide optical system for guiding the auxiliary light to the subject side.

This makes it possible to illuminate the subject with auxiliary light even when the light source unit is shielded by the conversion lens unit during shooting using the conversion lens.

An imaging apparatus according to a thirteenth aspect includes the conversion lens unit according to any one of the first to twelfth aspects.

According to the imaging apparatus of the present invention, scratches and contamination of the two optical surfaces on the incident light beam side and the outgoing light beam side of the conversion lens can be suppressed, so that a high-quality image can be acquired.

According to the present invention, a conversion capable of acquiring a high-quality image while suppressing the possibility of dust, scratches, oil on the user's finger, etc. adhering to the two optical surfaces on the incident light beam side and the exit light beam side of the conversion lens. A lens unit and an imaging device can be provided.

It is a perspective view which decomposes | disassembles and shows the housing | casing which accommodated the portable terminal which is an imaging device, the cover member attached to a portable terminal, and the conversion lens. It is a figure which shows the state which attached the housing | casing which accommodates a conversion lens, and the conversion lens unit comprised by the cover member to the portable terminal. FIG. 3A is a front view showing a state where the conversion lens unit is attached to the mobile terminal, and shows a state of normal photographing. FIG. 3B is a view taken along the line IIIB-IIIB in FIG. FIG. 4A is a front view showing a state in which the conversion lens unit is attached to the portable terminal, and shows a state of zooming photographing. 4B is a view taken along the line IVB-IVB in FIG. 4A and viewed in the direction of the arrow, and FIG. 4C is a view taken along the line IVC-IVC in FIG. 4A. FIG. FIG. 5A is a rear view of the housing that houses the conversion lens, FIG. 5B is a front view of the cover member, and FIG. 5C is a view of VC- in FIG. FIG. 5D is a view taken along the VC line and viewed in the arrow direction, and FIG. 5D is a view taken along the VD-VD line in FIG. 5B and viewed in the arrow direction. FIG. 6A is a front view showing the housing and the conversion lens removed from the cover member, and FIG. 6B is a perspective view showing a zooming state. FIG. 7A is a front view showing the casing and the conversion lens removed from the cover member, and FIG. 7B is a perspective view showing a normal photographing state. It is a figure which shows the 2nd barrier member periphery. It is a figure which shows the 2nd barrier member periphery concerning a modification, and shows the state which attached the housing | casing to the cover member, (a) is the figure seen from the front, (b) is IXB-IXB of (a). It is the figure cut | disconnected by the line and seen in the arrow direction. It is a figure which shows the 2nd barrier member periphery concerning a modification, shows the state which removed the housing | casing from the cover member, (a) is the figure seen from the front, (b) is XB-XB of (a). It is the figure cut | disconnected by the line and seen in the arrow direction. It is an external appearance perspective view which shows the other example of the sliding direction of a conversion lens unit, (a) shows the state which covered the master lens, (b) shows the state which open | released the master lens.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view illustrating a mobile terminal that is an imaging device, an attachment member attached to the mobile terminal, and a housing that houses a conversion lens. FIG. 2 is a diagram showing a state where a conversion lens unit composed of a housing housing a conversion lens and an attachment member is attached to a mobile terminal, and (a) is a shooting state using only a master lens (normally (Browsing state) is shown from the front side, and (b) is a state where the conversion lens is located on the subject side of the master lens (referred to as zooming state) viewed from the front side. (C) has shown the state seen from the back side.

For example, the portable terminal 100, which is a thin smartphone, has a rectangular plate shape, and is provided with a master lens 101 and an auxiliary light source 102 arranged side by side so as to be exposed on the front side. A liquid crystal panel 103 is provided. On the back side of the master lens 101, an image sensor 104 (see FIGS. 3 and 4) is provided.

The cover member 200 having both the protection function of the portable terminal 100 and the function as an attachment member for attaching the conversion lens unit 300 is made of elastic plastic, and each of the thin front plate 201 having a substantially rectangular shape and each of the front plate 201 It is integrally formed from side plates 202 to 205 that extend short in the direction perpendicular to the side. By attaching the side plates 202 to 205 to the side surface of the mobile terminal 100, the front plate 201 is attached in close contact with the front surface of the mobile terminal 100. The side plates 202 to 205 are provided with one or a plurality of notches so that the portable terminal 100 can be accessed in the attached state.

The cover member 200 penetrates the front plate 201, has four L-shaped notches 201a to 201d, a first cam groove 201e, a second cam groove 201f, a tapered master hole 201g, and a taper. Shaped auxiliary hole 201h. When the cover member 200 is attached to the portable terminal 100, the master hole 201g faces the master lens 101, and the auxiliary hole 201h faces the auxiliary light source 102.

In the present embodiment, a cover member that covers the entire front surface of the mobile terminal is described as an attachment member. However, the attachment member may cover a part of the front surface of the mobile terminal.

FIG. 3A is a front view showing a state where the conversion lens unit is attached to the mobile terminal, and shows a state of normal photographing. FIG. 3B is a view taken along the line IIIB-IIIB in FIG. FIG. 4A is a front view showing a state in which the conversion lens unit is attached to the portable terminal, and shows a state of zooming photographing. 4B is a view taken along the line IVB-IVB in FIG. 4A and viewed in the direction of the arrow, and FIG. 4C is a view taken along the line IVC-IVC in FIG. 4A. FIG. FIG. 5A is a rear view of the housing that houses the conversion lens, FIG. 5B is a front view of the cover member, and FIG. 5C is a view of VC- in FIG. FIG. 5D is a view taken along the VC line and viewed in the arrow direction, and FIG. 5D is a view taken along the VD-VD line in FIG. 5B and viewed in the arrow direction.

The conversion lens unit 300 includes a housing 301, a conversion lens 302 (simply shown in FIGS. 3 and 4) fixed in the housing 301, and a first barrier member 303 movably provided in the housing 301. And a second barrier member 304, a pair of locking members 305, and a spring 306 that biases the locking members 305 in a direction away from each other. The conversion lens 302 is a bending optical system, and the optical axis is bent twice by two prisms PS.

The housing 301 includes a rectangular first opening 301a on the front side as shown in FIGS. 3 and 4, and a circular second opening 301b and a third opening 301c on the back side as shown in FIG. , A slit 301d and a hole 301e are provided. An end of a first drive shaft 303a described later protrudes from the slit 301d, and an end of a second drive shaft 304b described later protrudes from the hole 301e. As shown in FIGS. 3 and 4, the outer surface of the housing 301 on the master lens 101 side is a tapered surface (inclined surface) 301 f that moves away from the optical axis of the master lens 101 as it moves away from the master lens 101. Therefore, the subject light incident at a predetermined angle of view during normal photographing is not blocked.

As shown in FIG. 5 (a), the pair of locking members 305 disposed to face each other are a protruding piece 305a protruding above or below the housing 301 and a T-shaped main body connected to the protruding piece 305a. 305b and a flange 305c that protrudes from both ends of the main body 305b to the back side of the housing 301 and has a tip bent upward or downward. The height of the collar portion 305c is h (see FIGS. 5C and 5D).

As shown in FIG. 5B, the L-shaped

cutouts

201a and 201b and the cutouts 201c and 202d of the cover member 200 are arranged symmetrically in the vertical direction, and the

cutouts

201a and 201c and the

cutouts

201b and 201d are in the same direction. Are arranged side by side in the horizontal direction. Therefore, at the cross-sectional position of FIG. 5C, the widths of the notches 201a and 202b (the same applies to the notches 201c and 202d) are narrow (referred to as region A), whereas at the cross-sectional position of FIG. The widths of 201c and 202d (the same applies to notches 201a and 202b) are wide (referred to as region B). The width of the

notches

201a and 201b and the notches 201c and 202d in the region B is w1, the width in the region A is w2, and w1> h> w2.

A mode in which the housing 301 containing the conversion lens is attached to the cover member 200 will be described. When the convex piece 305a protruding up and down from the housing 301 is picked with an operator's finger, the main bodies 305b approach each other against the biasing force of the spring 306, so that the flanges 305c at both ends thereof also approach. . Here, when the main body 305b abuts against the stopper 301i (see FIG. 5D) of the housing 301, further approach of the main body 305b is prevented. In such a state, the separated state of the flange portion 305c matches the separated state of the wide area B of the notches 201a and 202b (notches 201c and 202d).

Here, when the collar part 305c is brought close to the notches 201a and 202b (notches 201c and 202d), w1> h is satisfied. Then, it reaches the back side of the front plate 201 of the cover member 200. At the same time, an end portion of a first drive shaft 303a, which will be described later, is engaged with the first cam groove 201e, and an end portion of the second drive shaft 304b is engaged with the second cam groove 201f. At this time, when the operator releases his / her finger from the convex piece 305a, the main body 305b is urged up and down by the urging force of the spring 306, and the collar 305c is pressed against the upper and lower sides of the notches 201a and 202b (notches 201c and 202d). It is done. As a result, the collar portion 305 c is caught by the front plate 201, so that the housing 301 does not fall off from the cover member 200. When removing the housing 301 from the cover member 200, the operation is the reverse of the above.

If the operator moves the housing 301 to the left and right while gently grasping the upper and lower convex pieces 305a with fingers, the frictional force of the collar portion 305c decreases, so that the

notches

201a and 201b (

notches

201c and 201d) are narrow. It can be moved to the range of the width region A. In this state, since the height h of the collar portion 305c is larger than the narrow width w2 of the

notches

201a and 201b (

notches

201c and 201d), even if the operator carelessly presses the convex piece 305a with a finger, the collar portion 305c It stays in the notch and does not fall out carelessly.

Next, a mode for shielding the opening of the housing will be described. FIG. 6A is a front view showing the housing and the conversion lens removed from the cover member, and FIG. 6B is a perspective view, each showing a variable magnification photographing state. FIG. 7A is a front view showing the housing and the conversion lens removed from the cover member, and FIG. 7B is a perspective view, each showing a normal photographing state. However, in FIGS. 6 and 7, only the first opening 301a and the second opening 301b are shown.

The first barrier member 303 has a rectangular plate shape and is connected to the drive shaft 303a on the back side. The drive shaft 303a passes through the slit 301d (FIG. 5A) of the housing 301 and engages with the first cam groove 201e. The first drive shaft 303a is biased upward by a spring 303b.

FIG. 8 is a view showing the periphery of the second barrier member 304. The second barrier member 304 is made of a petal-like plate material, and is connected to a pivot shaft 304a and a second drive shaft 304b on the back surface thereof. The second drive shaft 304b passes through the hole 301e (FIG. 5A) of the housing 301 and engages with the second cam groove 201f. The pivot 304 a is rotatable with respect to the housing 301 and moves with the slide of the housing 301. In addition, a spring (not shown) is provided to urge the second barrier member 304 counterclockwise with respect to the pivot 304a.

In the state shown in FIG. 6, it is a position (referred to as a conversion position) where the housing 301 slides in the rightmost direction with respect to the cover member 200. At this time, as shown in FIG. The lens Lb closest to the image side is opposed. In such a state, the first drive shaft 303a is pushed by the side wall of the slit 301d of the housing 301 and is positioned at the right end of the first cam groove 201e against the urging force of the spring 303b.
Accordingly, the first barrier member 303 is retracted downward from the first opening 301a of the housing 301, and the first opening 301a is opened.

On the other hand, the second drive shaft 304b inserted through the hole 301e of the housing 301 is also positioned at the right end of the second cam groove 201f. As shown in FIG. 8, at this time, since the pivot shaft 304a is in the right lateral direction of the second drive shaft 304b, the second barrier member 304 is in a state of being retracted from the second opening 301b of the housing 301, and The two openings 301b are opened.

Thus, since the first opening 301a and the second opening 301b are opened, the object light incident from the first opening 301a has a field angle by the conversion lens 302 as shown in FIG. Then, the light is emitted from the second opening 301 b and enters the master lens 101, and is imaged by the master lens, and an image is formed on the image sensor 104 of the mobile terminal 100. The formed image is displayed on the liquid crystal panel 103 of the mobile terminal 100.

At this time, the third opening 301c of the housing 301 is opposed to the auxiliary light source 102. However, inside the third opening 301c, as shown in FIG. A light guide optical system including M2 and a convex lens L exposed to the outside is provided. Even when the auxiliary light source 102 is covered by the housing 301 at the time of zooming, the auxiliary light is irradiated to the subject side. Is possible. The light guide optical system is configured such that the emission angle is changed so that the auxiliary light emitted from the auxiliary light source 102 corresponds to the changed angle of view according to the shooting angle of view changed by the conversion lens 302. And auxiliary light can be used effectively. The light guide optical system may use a prism, a fiber, or the like.

On the other hand, in the state shown in FIG. 7, it is the position (referred to as a non-conversion position) where the casing 301 slides to the leftmost with respect to the cover member 200. At this time, as shown in FIG. The housing 301 is in a retracted state from the object side. In such a state, the first drive shaft 303a is pushed by the side wall of the slit 301d of the housing 301 and is positioned at the left end of the first cam groove 201e according to the urging force of the spring 303b. Accordingly, the first barrier member 303 moves upward to shield the first opening 301 a of the housing 301.

On the other hand, the second drive shaft 304b inserted through the hole 301e of the housing 301 also moves to the left end of the second cam groove 201f together with the housing 301. As shown in FIG. 8, at this time, since the pivot shaft 304a is located in the upper right direction of the second drive shaft 304b, the second barrier member 304 rotates counterclockwise around the pivot shaft 304a by a biasing force of a spring (not shown). This moves the second opening 301b of the housing 301 to shield it.

At this time, as shown in FIG. 3, the subject light is directly incident on the master lens 101 in a state where the housing 301 opens the subject light incident side of the master lens 101. The auxiliary light source 102 is also exposed, and normal auxiliary light can be emitted toward the subject. As described above, original normal shooting of the mobile terminal 100 can be performed.

Thus, when the housing 301 opens the master lens 101, the first opening 301a and the second opening 301b are shielded, so that the lens La closest to the object of the conversion lens 302 is the first lens La. Since the first opening 301a is not exposed and the lens Lb closest to the image is not exposed from the second opening 301b, the lens can be prevented from being damaged or contaminated.

Obviously, when the housing 301 is removed from the cover member 200, the first drive shaft 303a becomes free, so that the first barrier member 303 shields the first opening 301a by the biasing force of the spring 303b. Similarly, since the second drive shaft 304b becomes free, the second barrier member 304 shields the second opening 301b with a biasing force of a spring (not shown). Therefore, when the casing 301 is removed from the cover member 200, damage or contamination of the lens can be suppressed.

9 and 10 are diagrams according to a modification. In the embodiment described above, the second barrier member 304 shields the second opening 301b during normal photographing. However, since the second opening 301b faces the front surface of the cover member 200 in this state, it can be said that it is not always necessary to shield the second opening 301b. This modification corresponds to this, and the second barrier member 304 does not shield the second opening 301b in conjunction with the sliding of the casing 301, and the casing 301 is removed from the cover member 200. Sometimes it shields.

A partition portion 304 d is integrally formed with the second barrier member 304 that is rotatably supported by a pivot 304 a provided in the housing 301. The end portion of the partition portion 304d is biased by a spring member 304e, and the second barrier member 304 is constantly biased counterclockwise in FIG. 9A.

One end 304g of a seesaw member 304f is in contact with the partition part 304d. The seesaw member 304 f is pivotally supported by the housing 301, and the other end 304 h can project to the cover member 200 side through a slit 301 s formed in the housing 301.

As shown in FIG. 9, in a state where the housing 301 is attached to the cover member 200, the other end 304h of the seesaw member 304f exposed through the slit 301s is pushed by the cover member 200, and the timepiece in FIG. Since it rotates around, the partition part 304d is pushed rightward in FIG. 9A by the spring member 304e. As a result, the second barrier member 304 is rotated clockwise to open the second opening 301b.

On the other hand, when the casing 301 is removed from the cover member 200, the other end 304h of the seesaw member 304f becomes free as shown in FIG. 10B, so that the pressing force of the seesaw member 304f disappears, and the spring member The partitioning portion 304d is pulled to the left in FIG. 10A by the urging force of 304e, whereby the second barrier member 304 rotates counterclockwise and shields the second opening 301b. The first embodiment described above can be applied to the first barrier member.

Further, not only when the casing 301 is removed from the cover member 200 but also when the casing 301 is removed from the portable terminal together with the cover member 200, the second barrier member 304 shields the second opening 301b. Configuration is also possible. In this case, if a slit is provided in a range in which the other end 304h of the seesaw member 304f of the cover member 200 slides, and the other end 304h of the seesaw member 304f is configured to contact the surface of the mobile terminal, the same applies. With this mechanism, the second barrier member 304 can also shield the second opening 301b when the housing 301 is removed from the cover member 200 and when the housing 301 is removed from the portable terminal together with the cover member 200. .

The mechanism in which the second barrier member 304 shields and opens the second opening 301b is configured as in the above-described embodiment, and the first barrier member 303 is manually operated regardless of the conversion position and the non-conversion position. You may comprise so that 1 opening part 301a may be shielded and open | released.
In this case, an operating member (not shown) disposed outside the housing 301 is engaged with the first barrier member 303, and the first opening 301a is shielded and opened by operating the operating member. Can be done.

In the above embodiment, the case 301 is slid in the longitudinal direction of the bending optical system. However, as shown in FIG. 11, the direction orthogonal to the longitudinal direction of the bending optical system (up and down in FIG. 11). It may be configured to slide in the direction). At this time, a U-shaped flange (not shown in FIG. 11) is formed from a spring plate or the like at the end of the housing 301, so that the side edge of the mounting member 200 is sandwiched in the width direction, thereby converting the conversion lens. The unit can be prevented from falling off and can be moved up and down with the side edge as a guide. For the opening and closing of the barrier member, the same configuration as in the above-described embodiment can be applied.

The present invention is not limited to the embodiments described in the specification, and other embodiments and modifications are included for those skilled in the art from the embodiments and technical ideas described in the present specification. it is obvious. The housing 301 may be slidable with respect to the cover member 200 and may not be removable. 9 and 10, the seesaw member 304f is provided in the housing, and the above operation can be performed by detaching from the portable terminal. Further, when the housing 301 and the cover member 200 are integrally formed so as not to slide, the first barrier member 303 is operated by the operation member to shield and open the first opening, and the second barrier member 304 is operated. The above operation may be performed by detaching from the portable terminal by a seesaw member provided on the housing or the cover member. The operation of the first barrier member and the second barrier member is not limited to the above embodiment, and there are various drive modes.

DESCRIPTION OF SYMBOLS 100 Portable terminal 101 Master lens 102 Auxiliary light source 103 Liquid crystal panel 200 Cover member (attachment member)
201 Front plates 201a to 201d Notch 201e First cam groove 201f Second cam groove 201g Master hole 201h Auxiliary holes 202 to 205 Side plate 300 Conversion lens unit 301 Housing 301a First opening 301b Second opening 301c Third opening 301d Slit 301e hole 301f tapered surface 301i stopper 301s slit 302 conversion lens 303 first barrier member 303a first drive shaft 303b spring 304 second barrier member 304a pivot shaft 304b second drive shaft 304d partitioning portion 304e spring member 304f seesaw member 304g one end 304h, etc. End 305 Locking member 305a Convex piece 305b Main body 305c Gutter 306 Spring

Claims

In a conversion lens unit that includes a conversion lens that is arranged closer to the subject than the master lens of the imaging device and changes the shooting angle of view,
A housing that accommodates the conversion lens and includes a first opening that exposes the optical element closest to the object side of the conversion lens and a second opening that exposes the optical element closest to the image side of the conversion lens When,
A conversion lens unit, comprising: a first barrier member capable of shielding the first opening of the housing; and a second barrier member capable of shielding the second opening of the housing.
The conversion lens unit has an attachment member for attaching the housing to the imaging device, and the optical element on the most image side of the conversion lens is moved by sliding the housing relative to the attachment member. 2. The conversion position facing the master lens and the non-conversion position where the conversion lens is retracted from the master lens and photographing with only the master lens is possible. The conversion lens unit described in 1.
In the conversion position, the first barrier member retreats from the first opening to open the first opening, and the second barrier member retreats from the second opening to open the second opening. The conversion lens unit according to claim 2, wherein the conversion lens unit is opened.
4. The conversion lens unit according to claim 2, wherein the first barrier member shields the first opening at the non-conversion position.
The said housing | casing is comprised so that it can be removed from the said attachment member, and when the said housing | casing is removed from the said attachment member, the said 2nd barrier member shields the said 2nd opening part. Conversion lens unit.
The conversion lens unit according to claim 4, wherein the second barrier member shields the second opening when the attachment member is removed from the imaging device together with the housing.
4. The conversion lens according to claim 2, wherein in the non-conversion position, the first barrier member shields the first opening, and the second barrier member shields the second opening. 5. unit.
The first barrier member and the second barrier member shield the first opening and the second opening in conjunction with the sliding of the housing. The conversion lens unit described in Crab.
3. The first barrier member according to claim 1, wherein the first barrier member is configured to be able to shield and open the first opening by an operation member regardless of the conversion position and the non-conversion position. Conversion lens unit.
The conversion lens according to any one of claims 2 to 9, wherein the conversion lens includes a bending optical system, and the casing slides in a longitudinal direction of the bending optical system or in a direction orthogonal to the longitudinal direction. Conversion lens unit.
The conversion lens unit according to claim 10, wherein the casing has an outer surface on the master lens side formed on an inclined surface so as not to block an incident light beam to the master lens at the non-conversion position.
12. The imaging device according to claim 2, wherein the imaging device includes a light source that emits auxiliary light, and the housing includes a light guide optical system that guides auxiliary light from the light source to a subject side at the conversion position. The conversion lens unit according to any one of the above.
An imaging apparatus comprising the conversion lens unit according to any one of claims 1 to 12.