JP4396211B2 - Lens cap and imaging device - Google Patents

Description

  The present invention relates to a lens cap that protects a lens, and an imaging apparatus including such a lens cap.

  For example, in an imaging device such as a digital still camera or a digital video camera, the lens is attached to the lens portion provided on the front surface of the device body when not in use so that the lens is not damaged or dust is attached to the lens. By attaching a cap, the lens facing the lens portion is protected. (For example, see Patent Document 1).

  For example, a lens cap 200 shown in FIGS. 11, 12, and 13 includes a substantially disc-shaped cap body 201 that covers the front surface of the lens unit 300, and a position of the cap body 201 that is opposed to each other on the outer periphery of the cap body 201. A pair of movable members 202a and 202b attached so as to be slidable toward the central portion, and a compression coil spring 203 that urges the pair of movable members 202a and 202b away from each other are provided.

The cap body 201 is formed by combining a pair of case members 201b and a cover member 201a, and the case member 201b side is fitted into the lens unit 300. In addition, a pair of notches 204a and 204b are formed on the outer periphery of the cap body 201 so that the pair of movable members 202a and 202b can be exposed to the outside. On the other hand, the pair of movable members 202a and 202b has a hook part 205 for retaining, and when the hook part 205 is biased in a direction away from each other by the compression coil spring 203, the hook part 205 is located at the center of the case member 201b . By being locked by the stopper portion 206 provided in the portion, the pair of cutout portions 204a and 204b is prevented from coming off. In addition, the pair of movable members 202a and 202b have spring receiving protrusions 207 that are inserted into both ends of the compression coil spring 203, whereby the compression coil spring 203 is interposed between the pair of movable members 202a and 202b. It is held in a compressed state. Further, when the pair of movable members 202 a and 202 b are fitted inside the lens unit 300, a lock claw 208 that is engaged with a screw groove 301 formed on the inner surface of the lens unit 300, and the lock claw 208. And a knob 209 for releasing the locked state of the screw groove 301.

When the lens cap 200 configured as described above is attached to the lens unit 300, first, as shown in FIG. 14, the knob unit 209 is operated with a finger and the pair of movable members 202a and 202b are brought close to each other. The case member 201b side of the cap body 201 is fitted inside the lens unit 300 while being pressed in the direction to be moved. Next, as shown in FIG. 15, by releasing the pressure on the pair of movable members 202a and 202b from this state, the lock claws 208 of the pair of movable members 202a and 202b are engaged with the screw grooves 301 of the lens unit 300. It will be in the state. Thereby, the lens cap 200 can be attached to the lens unit 300.

  By the way, in the above-described conventional lens cap 200, as shown in FIG. 14, when the knob portion 209 is picked and operated by a finger, a pair of movable members 202a and 202b slide toward the center portion of the cap body 201. The cap body 201 is inclined to the side opposite to the side fitted into the lens unit 300.

  Then, from this state, as shown in FIG. 15, when the pressure on the pair of movable members 202 a and 202 b is released, the lock claws 208 of the pair of movable members 202 a and 202 b are moved to the lens unit 300 along with the elastic return of the compression coil spring 203. The cap main body 201 is moved to the original position of the pair of movable members 202a and 202b inclined to the side opposite to the side fitted in the lens unit 300, although the cap body 201 is engaged with the screw groove 301 of the lens unit 300. The side is shifted to the side opposite to the side fitted in 300.

  For this reason, in the conventional lens cap 200, a gap S is originally generated between the cap body 201 that should cover the front surface of the lens unit 300 and the front end of the lens unit 300 with which the cap body 201 abuts. There is a problem that the lens unit 300 cannot be securely attached. Further, the imaging apparatus has a problem that the lens 302 cannot be properly protected when dust or the like enters from the gap S.

JP 2003-84332 A

  Therefore, the present invention has been proposed in view of such conventional circumstances, and an object of the present invention is to provide a lens cap capable of improving the mountability to the lens unit and reliably protecting the lens. And

  It is another object of the present invention to provide an imaging apparatus that can protect a lens and further improve convenience by providing such a lens cap.

In order to achieve this object, the lens cap according to the present invention includes a cap body that covers the front surface of the lens portion facing the lens, and a locked portion provided on the inner surface of the lens portion while being fitted inside the lens portion. A locking portion that is locked to the front portion and a contact portion that is in contact with the front end portion of the lens portion, and slides toward the center of the cap body from a position facing each other on the outer periphery of the cap body. A pair of movable members attached to each other, a biasing means that biases the pair of movable members in a direction away from each other, and a pair of movable members pressed in directions close to each other against the biasing of the biasing means by, when sliding the pair of movable members toward the center portion of the cap body, it is shifted to the side to be fitted with a pair of movable members in the lens unit relative to the cap body, the abutment of the pair of movable members There has been characterized by comprising a guide means to be abutted against the front end portion of the lens portion.

The imaging apparatus according to the present invention includes a main body, a lens unit facing the lens from the front surface of the main body, and a lens cap attached to the lens unit. The lens cap covers the front surface of the lens unit. And an engaging portion that is engaged with an engaged portion provided on the inner surface of the lens portion in a state of being fitted inside the lens portion, and an abutting portion that is in contact with the front end portion of the lens portion. And a pair of movable members slidably attached from the positions facing each other on the outer periphery of the cap body toward the center of the cap body, and a biasing means for biasing the pair of movable members in a direction away from each other When the pair of movable members are slid toward the center of the cap body by pressing the pair of movable members in a direction approaching each other against the bias of the biasing means, The movable member is shifted to the side to be fitted to the lens portion of, is characterized by having a guide means to ensure that contact portions of the pair of movable members are in contact with the front end portion of the lens portion.

As described above, in the present invention, when the pair of movable members are pressed toward each other against the urging force of the urging means, and the pair of movable members are slid toward the center portion of the cap body, the guide Since the means shifts the pair of movable members to the side to be fitted into the lens portion with respect to the cap body, when the engaging portions of the pair of movable members are fitted inside the lens portion from this state , The contact portion of the movable member is brought into contact with the front end portion of the lens portion. Then, by releasing the pressure on the pair of movable members, the locking portion is locked to the locked portion, and the cap body is shifted to the side to be fitted into the lens portion, and the pair of movable members and the cap body Is brought into contact with the front end portion of the lens portion.

  Therefore, according to the present invention, it is possible to securely attach the lens cap to the lens portion without causing a gap between the cap body and the front end portion of the lens portion with the same operation as before. It is possible to prevent dust and the like from entering between the lens cap and the lens portion, and appropriately protect the lens.

  Hereinafter, a lens cap and an imaging apparatus to which the present invention is applied will be described in detail with reference to the drawings.

  First, an image pickup apparatus to which a lens cap to which the present invention is applied is mounted will be described.

  An imaging apparatus to which the present invention is applied is, for example, a camera-integrated digital video tape recorder (hereinafter referred to as a digital video camera) 1 shown in FIGS.

  The digital video camera 1 includes a main body 2 having a substantially rectangular parallelepiped shape as a whole, and a lens unit 4 that faces the imaging lens 3 to the outside is provided on the front surface of the main body 2. The lens portion 4 is formed to protrude in a substantially cylindrical shape toward the front, and holds the imaging lens 3 inside thereof.

  Further, inside the main body 2, a lens barrel incorporating an optical system including the imaging lens 3, a CCD (Charge Coupled Device) that captures an image of a subject imaged by the lens barrel, and the like. An imaging unit is provided. The imaging unit converts the image captured through the imaging lens 3 into an electrical signal by the CCD, and outputs it as video data to a recording / reproducing unit, a display unit, etc., which will be described later.

Further, optical accessory parts such as a conversion lens and a filter are detachable in front of the lens part 4 , and a locked part when these optical accessory parts are attached to the inner peripheral surface of the lens part 4. A screw groove (female screw) 5 is formed. Further, a lens cap 50 to which the present invention to be described later is applied is detachable from the lens unit 4, and the imaging lens 3 can be protected by attaching the lens cap 50 when not in use. ing. The lens cap 50 removed when using the digital video camera 1 is hung from the main body 2 by a string 51 in order to prevent loss.

  On the upper surface of the main body 2, a flash light emitting unit 6 that emits a strobe at night is provided so as to be popped up. Further, a stereo microphone 7 such as a microphone is provided on the upper surface of the main body 2 as a sound recording unit for recording sound.

  On the back side of the main body 2, an electronic viewfinder (EVF) 8 for peeping at an image picked up by the above-described image pickup unit is provided so as to be able to be drawn out from the main body 2.

  A panel portion 10 is attached to one side surface of the main body portion 2 via a hinge mechanism 9 so as to be opened and closed. The panel portion 10 is housed in a panel housing portion 11 formed by cutting out the side surface of the main body portion 2 in the closed state, and in the opened state, the liquid crystal display panel (LCD) provided on one main surface side. Thus, it is possible to display an image photographed by the imaging unit in addition to the above-described rear viewfinder 8. Further, the hinge mechanism 9 supports the panel portion 10 so as to be rotatable in the opening / closing direction with respect to the main body portion 2 and also supports the panel portion 10 so as to be rotatable around an axis orthogonal to the opening / closing direction. Thereby, the panel part 10 can switch the direction of a liquid crystal display panel in the open state. A battery pack 12 serving as a power source for the digital video camera 1 is detachably attached to the lower portion of the panel portion 10 of the main body portion 2.

  A grip belt 13 for gripping the main body 2 is attached to the other side surface of the main body 2. A soft cover 14 that covers the grip belt 13 and a cap holding member 15 provided with a through hole 15 a for passing the string 51 of the lens cap 50 are attached to the grip belt 13. A string 51 is inserted into the through hole 15a of the cap holding member 15 with a certain sliding contact resistance. Therefore, the lens cap 50 can be held at the hand of the cap holding member 15 by pulling the tip of the string 51 so that the removed lens cap 50 does not hang down.

  Further, a lid is attached to the other side of the main body 2 so as to be openable and closable, and a cassette mounting portion for mounting a tape cassette is provided on the inner side thereof. In the main body 2, a magnetic tape cassette mounted on the tape cassette mounting portion serves as a recording / reproducing unit for recording / reproducing the video signal and the audio signal from the imaging unit and the audio recording unit. A rotary head device that records and reproduces signals on the tape, and a tape that moves the magnetic tape at a constant speed while pinching the magnetic tape drawn by a plurality of guide rollers between the pinch roller and capstan. A traveling mechanism or the like is provided. In addition, operation buttons and switches for performing various operations are provided at various locations on the main body 2.

  Next, the lens cap 50 to which the present invention is applied will be described.

  As shown in FIGS. 3, 4, 5, 6, and 7, the lens cap 50 includes a substantially disc-shaped cap body 52 that covers the front surface of the lens portion 4, and an outer peripheral portion of the cap body 52. A pair of movable members 53a and 53b that are slidably attached toward the center of the cap body 52 from positions facing each other, and a biasing means that biases the pair of movable members 53a and 53b in a direction away from each other. A compression coil spring 54 is provided.

The cap body 52 is formed by combining a pair of a case member 55 and a cover member 56 formed by injection molding a synthetic resin material having mechanical strength. Specifically, the case member 55 includes a bottom surface portion 55a formed in a substantially circular shape, and a peripheral wall 55b formed so as to rise from one main surface side of the bottom surface portion 55a along the outer peripheral edge portion. The case member 55 constitutes the back side of the cap body 52, and the outer diameter thereof is larger than the inner diameter of the lens unit 4. When the case member 55 is attached to the lens unit 4, the other main surface side is the lens unit 4. It will contact | abut with the front-end part. Further, on the other main surface side of the case member 55, a substantially circular fitting protrusion 57 is formed so as to be fitted inside the lens portion 4.

On the other hand, the cover member 56 constitutes the front surface side of the cap main body 52, and is formed so as to rise from the main surface side of the bottom surface portion 56a along the outer peripheral edge portion. And a peripheral wall 56b. The cover member 56 is designed to be slightly larger than the outer diameter of the case member 55 because the case member 55 is fitted (lightly press-fitted) into the cover member 56.

  The cover member 56 includes a positioning protrusion 58 that protrudes from the inner peripheral surface of the peripheral wall 56b in the depth direction and a plurality of latches that protrude from the inner peripheral surface of the peripheral wall 56b in the peripheral direction. And a protrusion 59. On the other hand, the case member 55 includes a positioning groove 60 that cuts out the peripheral wall 55b in the depth direction, and a plurality of locked grooves 61 that are cut out in the peripheral direction on the outer peripheral surface of the peripheral wall 55b. ing. When the case member 55 is fitted inside the cover member 56, a plurality of engagements are made with the case member 55 positioned with respect to the cover member by the engagement between the positioning protrusion 58 and the positioning groove 60. The protrusion 59 is locked in the plurality of locked grooves 61. Thereby, the cap main body 52 is comprised.

  In addition, a pair of notches 62a and 62b for allowing the pair of movable members 53a and 53b to face the outside is formed on the outer peripheral portion of the cap body 52. The pair of cutout portions 62a and 62b are cut out with a predetermined width from a position where the outer peripheral portions face each other toward the center portion, corresponding to a movable range of a pair of movable members 53a and 53b described later. .

  The cap body 52 is attached with a string 51 that is hung on the body portion 2 of the digital video camera 1 described above. Specifically, the case member 55 includes a groove 63 that cuts out the peripheral wall 55b in the depth direction, a boss 64 that protrudes upward from the bottom surface 55a in the vicinity of the groove 63, and an outer side from the vicinity of the groove 63 in the peripheral wall 55b. And a projecting portion 65 projecting toward the. On the other hand, the cover member 56 includes a groove portion 66 that cuts out the peripheral wall 56b in the depth direction, and a boss 67 that protrudes upward from the bottom surface portion 56a in the vicinity of the groove portion 66. A hole 67a is formed at the center. Then, when the case member 55 and the cover member 56 are combined, the cap main body 52 has a protruding portion on the case member 55 side in a state where the groove portion 63 on the case member 55 side and the groove portion 66 on the cover member 56 side coincide with each other. 65 is engaged with the groove 66 on the cover member 56 side, and the boss 64 on the case member 55 side is fitted into the hole 67a of the boss 67 on the cover member 56 side. On the other hand, the string 51 is extended to the outside of the cap body 52 through the groove parts 63 and 66 while being hooked on the boss 67 on the cover member 56 side. Thereby, the string 51 is attached to the cap main body 52.

The pair of movable members 53a and 53b have the same shape as each other, and are formed by injection molding using the same synthetic resin material as the cap body 52. Specifically, the pair of movable members 53a and 53b includes a substantially rectangular flat base 68 and a pair of elastic displacement pieces 69 provided in parallel with each other from both ends of the base 68. At the tip of the elastic displacement piece 69, a hook portion 70 is formed to protrude outward. On the other hand, a pair of recesses 71 are provided in the central portion of the case member 55 so that the elastic displacement pieces 69 of the pair of movable members 53a and 53b face the outside from the other main surface side of the case member 55. The recess 71 includes a pair of holes 72 that pass through the interior of the case member 55, and a pair of stopper portions 73 , 73 to which the pair of hook portions 70 are locked through the pair of holes 72. Is provided. The pair of movable members 53a and 53b is inserted into the cap body 52 through the pair of notches 62a and 62b, and the hook portion 70 provided at the tip of the pair of elastic displacement pieces 69 is a hole. By being locked to the stopper portion 73 in the recess 71 through 72, the pair of notches 62a and 62b is prevented from coming off.

  In addition, the pair of movable members 53 a and 53 b have an inclined protrusion 76 on the main surface facing the case member 55 of the base 68 and an inclined recess 77 on the main surface facing the cover member 56 of the base 68. . Among these, the inclined protrusion 76 has a shape that increases from the outside toward the inside. On the other hand, the inclined recess 77 has a shape that becomes deeper from the outside toward the inside. On the other hand, a pair of inclined protrusions 78 that are in contact with the inclined protrusions 76 of the pair of movable members 53a and 53b are formed on the bottom surface of the case member 55 so as to protrude. The pair of inclined protrusions 78 have a shape that decreases from the outside toward the inside. On the other hand, a pair of inclined protrusions 79 are formed on the bottom surface of the cover member 56 so as to be engaged with the inclined recesses 77 of the pair of movable members 53a and 53b. The pair of inclined protrusions 79 has a shape that increases from the outside toward the inside.

  The pair of movable members 53a and 53b includes a fitting portion 80 fitted inside the lens portion 4 and the above-described screw groove of the lens portion 4 when the cap body 52 is fitted inside the lens portion 4. 5, a lock claw 81 that is a lock portion that is locked to 5, and a knob 82 that releases the lock claw 81 and the screw groove 5.

The fitting portion 80 is formed to project from the main surface of the base 68 on the case member 55 side in a direction orthogonal to the sliding direction of the pair of movable members 53 a and 53 b, and the pair of movable members 53 a and 53 b When pushed inward, the pair of cutout portions 62a and 62b of the fitting projection 57 cut so as to form a circular projection continuous with the fitting projection 57 of the case member 55 described above. It has a substantially arc shape corresponding to the missing part. Further, the outer peripheral portion of the fitting portion 80 on the main surface of the base member 68 of the pair of movable members 53 a and 53 b on the case member 55 side is a contact portion 74 that is in contact with the front end portion of the lens portion 4. Yes.

  A plurality of the lock claws 81 are formed so as to protrude from the outer peripheral surface of the fitting portion 80 that is curved in an arc shape at equal intervals corresponding to the screw grooves 5 of the lens portion 4.

  The knob 82 is a part that is operated by picking with a finger, and has a shape recessed inward. In the lens cap 50, it is possible to press the knob 82 in a direction approaching each other against the urging force of the compression coil spring 54 of the pair of movable members 53a and 53b by operating the knob 82 with a finger. Yes.

The compression coil spring 54 is held in a compressed state between the pair of movable members 53 a and 53 b inside the cap body 52. Specifically, the central portion of the bottom surface of the case member 55, a pair of rising walls 83 for holding the compression coil spring 54 is rising formed parallel to each other. On the other hand, the pair of movable members 53 a and 53 b have spring receiving protrusions 84 inserted into both ends of the compression coil spring 54, and the spring receiving protrusions 84 are a pair of elastic displacement pieces 69 of the base 68. , 69 project in the same direction as the pair of elastic displacement pieces 69 , 69 . The compression coil spring 54 is held between the pair of rising walls 83 of the case member 55, and the spring receiving projections 84 of the pair of movable members 53 a and 53 b are inserted into both end portions thereof, thereby The movable members 53a and 53b are held in a compressed state. As a result, the compression coil spring 54 biases the pair of movable members 53a and 53b away from each other, that is, toward the outside of the cap body 52.

  When the lens cap 50 configured as described above is attached to the lens portion 4, first, as shown in FIG. 8, the knob portion 82 is operated with a finger to resist the bias of the compression coil spring 54. The pair of movable members 53a and 53b are pressed in directions approaching each other.

  At this time, the pair of movable members 53a and 53b slide in the direction indicated by arrow A in FIG. 8 from the center of the cap body 52, that is, from the pair of notches 62a and 62b toward the inside of the cap body 52. The inclined protrusion 76 of the base body 68 slides inward on the inclined protrusion 76 of the case member 55, and the inclined protrusion 79 of the cover member 56 slides inward on the inclined recess 77 of the base member 68. Along with this, the pair of movable members 53 a and 53 b are shifted to the side where the cap body 52 is fitted into the lens unit 4.

In this state, the case member 55 side of the cap body 52 is fitted inside the lens portion 4. As a result, the fitting protrusion 57 of the case member 55 and the fitting portion 80 of the pair of movable members 53a and 53b are fitted inside the lens portion 4. At this time, the lock claws 81 of the pair of movable members 53a and 53b are in a state of facing each other substantially in parallel with the screw groove 5 of the lens unit 4. As is clear from FIG. 8, the contact portions 74 of the pair of movable members 53 a and 53 b are shifted from the cap body 52 to the side to be fitted into the lens portion 4, and are located at the front end portion of the lens portion 4. It is in a contact state.

  Next, as shown in FIG. 9, the pressure on the pair of movable members 53a and 53b is released from this state. Then, as the compression coil spring 54 returns to elasticity, the pair of movable members 53a and 53b are separated from each other, that is, from the pair of notches 62a and 62b toward the outside of the cap body 52, as indicated by an arrow B in FIG. The lock claw 81 of the pair of movable members 53 a and 53 b is locked in the screw groove 5 of the lens unit 4.

Further, when the pair of movable members 53a and 53b slide toward the outside of the cap body 52, the inclined protrusion 76 of the base body 68 slides outward on the inclined protrusion 76 of the case member 55, thereby covering the cover. The inclined projection 79 of the member 56 slides outward on the inclined recess 77 of the base body 68. At this time, as is apparent from FIG. 9, the contact portions 74 of the pair of movable members 53a and 53b are in contact with the front end portion of the lens portion 4, and the cap is maintained while maintaining the contact state. Slide toward the outside of the main body 52. Along with this, the cap body 52 is shifted to the side to be fitted into the lens portion 4, and the case member 55 side of the cap body 52 is brought into contact with the front end portion of the lens portion 4. As described above, it is possible to reliably mount the lens cap 50 on the lens unit 4.

As described above, in the lens cap 50, as shown in FIG. 8, the pair of movable members 53a and 53b are pressed toward each other, and the pair of movable members 53a and 53b are directed toward the center of the cap body 52. The pair of movable members 53a and 53b are shifted toward the side where the lens unit 4 is fitted with respect to the cap body 52. When the lens cap 50 is fitted into the lens portion 4 from this state , the contact portions 74 of the pair of movable members 53a and 53b are brought into contact with the front end portion of the lens portion 4. In this state, as shown in FIG. 9, the lock claws 81 of the pair of movable members 53 a and 53 b are locked to the screw grooves 5 of the lens unit 4 by releasing the pressure on the pair of movable members 53 a and 53 b. At the same time, the cap body 52 is shifted to the side where it is fitted into the lens portion 4, and the cap body 52 is in contact with the front end portion of the lens portion 4.

  Therefore, in the digital video camera 1 including the lens cap 50, the lens cap 50 is attached to the lens portion 4 without causing a gap between the lens cap 50 and the front end portion of the lens portion 4 by an operation that is not different from the conventional one. It is possible to install it reliably. In the digital video camera 1, the lens cap 50 is more easily attached to the lens unit 4, thereby increasing the sense of quality. Further, in the digital video camera 1, it is possible to prevent dust and the like from entering between the lens cap 50 and the lens unit 4, and it is possible to appropriately protect the imaging lens 3.

  In the present invention, when the pair of movable members 53 a and 53 b are slid toward the center portion of the cap body 52, the pair of movable members 53 a and 53 b are fitted to the lens portion 4 with respect to the cap body 52. If the guide means for shifting is provided, the inclined protrusion 76 of the base 68 described above slides on the inclined protrusion 76 of the case member 55, and the inclined protrusion 79 of the cover member 56 is inclined to the inclined recess 77 of the base 68. It is not necessarily limited to the structure which slides up. For example, it is possible to arbitrarily change the arrangement, number, gradient, and the like of such inclined protrusions and inclined recesses.

  Further, for example, as in the modification shown in FIG. 10, the guide pin 85 provided on the pair of movable members 53a and 53b side is engaged with the guide slit 86 provided on the cap body 52 side, whereby the cap The configuration may be such that the pair of movable members 53 a and 53 b are shifted toward the side where the lens unit 4 is fitted with respect to the main body 52.

  In this case as well, the lens cap 50 can be securely attached to the lens unit 4 without generating a gap between the lens cap 50 and the front end of the lens unit 4 by an operation that is not different from the conventional one. The present invention may have a configuration opposite to the above-described modification, that is, a configuration in which a guide slit 86 is provided on the pair of movable members 53a and 53b side and a guide pin 85 is provided on the cap body 52 side.

  The present invention is not limited to the lens cap 50 attached to the digital video camera 1 described above, and can be attached with a lens cap, such as an imaging device such as a camera, or an optical device such as a telescope or binoculars. Widely applicable.

It is a perspective view which shows the imaging device with which the lens cap to which this invention was applied was mounted | worn. It is a perspective view which shows the imaging device with the said lens cap removed. It is the perspective view which looked at the above-mentioned lens cap from the front side. It is the perspective view which looked at the above-mentioned lens cap from the back side. It is the disassembled perspective view which looked at the structure of the said lens cap from the front side. It is the disassembled perspective view which looked at the structure of the said lens cap from the back side. It is sectional drawing which shows the structure of the said lens cap and a lens part. It is a figure for demonstrating mounting | wearing operation | movement with respect to the lens part of the said lens cap, and is sectional drawing which shows the state in which the lens cap was engage | inserted by the lens part. It is a figure for demonstrating mounting | wearing operation | movement with respect to the lens part of the said lens cap, and is sectional drawing which shows the state with which the lens cap was mounted | worn to the lens part. It is sectional drawing which shows the modification of the said lens cap. It is the disassembled perspective view which looked at the structure of the conventional lens cap from the front side. It is the disassembled perspective view which looked at the structure of the said conventional lens cap from the back side. It is sectional drawing which shows the structure of the said conventional lens cap and a lens part. It is a figure for demonstrating mounting | wearing operation | movement with respect to the lens part of the said conventional lens cap, and is sectional drawing which shows the state in which the lens cap was engage | inserted by the lens part. It is a figure for demonstrating mounting | wearing operation | movement with respect to the lens part of the said conventional lens cap, and is sectional drawing which shows the state with which the lens cap was mounted | worn to the lens part.

  DESCRIPTION OF SYMBOLS 1 Digital video camera, 2 Main body part, 4 Lens part, 5 Thread groove, 50 Lens cap, 52 Cap main body, 53a, 53b A pair of movable member, 54 Compression coil spring, 55 Case member, 56 Cover member, 81 Lock claw

Claims (10)

A cap body that covers the front surface of the lens part facing the lens;
A locking portion that is locked to a locked portion provided on an inner surface of the lens portion in a state of being fitted inside the lens portion, and a contact portion that is in contact with a front end portion of the lens portion. A pair of movable members slidably attached from the positions facing each other on the outer periphery of the cap body toward the center of the cap body;
A biasing means for biasing the pair of movable members in a direction away from each other;
When the pair of movable members are slid toward the center of the cap body by pressing the pair of movable members in a direction close to each other against the bias of the biasing means, the cap body And a guide unit that shifts the pair of movable members toward the side to be fitted into the lens portion, and makes the contact portions of the pair of movable members contact the front end portions of the lens portions. cap. In a state where the pair of movable members are pressed in a direction approaching each other, after engaging the locking portions of the pair of movable members inside the lens portion, by releasing the pressure on the pair of movable members, together with the locking portion is engaged with the engaged portion, the cap body is shifted to the side to be fitted in the lens unit, billed to the cap body Ru is brought into contact with the front end portion of the lens portion The lens cap according to Item 1. The guide means has an inclined protrusion provided on at least one of the cap body and the pair of movable members,
The pair of movable members, while shifting to the side to be fitted to the lens portion with respect to the cap body by the inclined projections, 請 Motomeko 1 wherein the lens toward the center Ru is slid in the cap body cap. The guide means includes a guide pin provided on one of the cap body and the pair of movable members, and a guide slit provided on the other.
The pair of movable members, while shifting to the side to be fitted to the lens portion with respect to the cap body by the engagement between the guide pin and the guide slit, Ru is slid toward the center portion of the cap body 請 The lens cap according to claim 1. It said biasing means includes a lens cap Ah Ru請 Motomeko 1, wherein the compression coil spring held in a compressed state between the pair of movable members. The main body,
A lens part facing the lens from the front surface of the main body part;
A lens cap mounted on the lens unit,
The lens cap includes a cap body that covers a front surface of the lens unit;
A locking portion that is locked to a locked portion provided on an inner surface of the lens portion in a state of being fitted inside the lens portion, and a contact portion that is in contact with a front end portion of the lens portion. A pair of movable members slidably attached from the positions facing each other on the outer periphery of the cap body toward the center of the cap body;
A biasing means for biasing the pair of movable members in a direction away from each other;
When the pair of movable members are slid toward the center of the cap body by pressing the pair of movable members in a direction close to each other against the bias of the biasing means, the cap body And a guide means for shifting the pair of movable members toward the side to be fitted into the lens portion so that the contact portions of the pair of movable members are in contact with the front end portion of the lens portion. that imaging device. The lens cap is configured to press the pair of movable members after the engaging portions of the pair of movable members are fitted inside the lens unit in a state where the pair of movable members are pressed in a direction approaching each other. By releasing, the locking portion is locked to the locked portion, and the cap body is shifted to the side to be fitted into the lens portion, and the cap body is brought into contact with the front end portion of the lens portion. by being contact, the imaging device 請 Motomeko 6 wherein that will be attached to the lens unit. The guide means has an inclined protrusion provided on at least one of the cap body and the pair of movable members,
The pair of movable members, while shifting to the side to be fitted to the lens portion with respect to the cap body by the inclined projections, imaging 請 Motomeko 6, wherein towards the center Ru is slid in the cap body apparatus. The guide means includes a guide pin provided on one of the cap body and the pair of movable members, and a guide slit provided on the other.
The pair of movable members, while shifting to the side to be fitted to the lens portion with respect to the cap body by the engagement between the guide pin and the guide slit, Ru is slid toward the center portion of the cap body 請 The imaging device according to claim 6. It said biasing means, the imaging apparatus of Ah Ru請 Motomeko 6, wherein the compression coil spring held in a compressed state between the pair of movable members.

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