JP2014142373A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus in which a lens barrel advances and retreats with respect to a camera main body, which enables photographing under water and under environment of a large amount of water droplets such as rain, without adding a new component, to enhance waterproofness.SOLUTION: The imaging apparatus in which the lens barrel extends and contracts and which has waterproof and drip-proof properties comprises: driving direction instruction means for a lens; means for discriminating the driving direction of the lens; and water droplet detection means. When the water droplet detection means detects a water droplet, the driving of the lens barrel by which the inner pressure of the imaging apparatus is reduced with respect to outside pressure is inhibited.

Description

  The present invention relates to an image pickup apparatus, and more particularly to an image pickup apparatus having a structure in which a lens barrel advances and retreats with respect to a camera body and has a drip-proof property.

  2. Description of the Related Art Conventionally, in an imaging apparatus in which a lens barrel advances and retreats with respect to a camera body, an imaging apparatus that prevents water from entering into the imaging apparatus from outside or immersion is known.

  In the prior art disclosed in Patent Document 1, in a waterproof optical instrument, in order to prevent the function of the optical instrument from malfunctioning due to a pressure difference caused by the advance and retreat of the lens barrel, the recording medium is taken out. When the back cover of the optical device is open, the pressure inside the device main body when the lens barrel portion is extended most out of the device main body in the airtight state, and the lens barrel portion is most retracted into the device main body. It is described that the lens barrel portion is advanced and retracted to a first position where a pressure approximately in the center with respect to the pressure inside the device main body is generated.

  In the technique disclosed in Patent Document 2, when the inside of the waterproof case 100 that houses the camera becomes negative pressure, the high pressure gas cylinder 201 that discharges high pressure gas into the case in conjunction with the negative pressure, and the inside of the case becomes positive pressure. When this happens, a waterproof case composed of an exhaust valve 301 that releases gas to the outside of the case in conjunction with the waterproof case improves the waterproof property by relieving the difference in pressure inside and outside the waterproof case regardless of the water depth.

JP 7-128719 A JP 2004-286907 A

  However, in Patent Document 1, when the lens barrel is advanced and retracted during photographing with the back lid closed, when retracted from the first position, positive pressure is applied to the outside air, and when the lens barrel is retracted from the first position. Becomes negative pressure. At this negative pressure, if a large amount of water droplets are attached in an environment such as water or rain, there is a possibility that the water will be submerged from the joint of the camera exterior or between the lens barrel and the body.

  However, in Patent Document 2, since the high-pressure gas cylinder 201 is stored, the apparatus may be increased in size.

  Therefore, an object of the present invention is to provide an imaging apparatus in which the lens barrel advances and retreats with respect to the camera body, without adding new parts to improve waterproofness, and in a large amount of water droplet environment such as underwater or rain. An object of the present invention is to provide an imaging apparatus that enables photographing.

In order to achieve the above object, the present invention of claim 1
In an imaging device having waterproof and drip-proof properties in which the lens barrel expands and contracts,
A lens driving direction indicating means;
Means for determining the driving direction of the lens;
Has water drop detection means,
When the water drop detection means detects a water drop,
The imaging apparatus is characterized by prohibiting lens barrel driving in which the internal pressure of the imaging apparatus decreases with respect to the external pressure.

The present invention of claim 2
The imaging device according to claim 1.
When the water droplet detection means detects a water droplet,
The imaging apparatus is characterized in that the lens barrel is driven by an arbitrary amount in a direction in which the volume of the imaging apparatus decreases and stopped.

The present invention of claim 3
In an imaging device having waterproof and drip-proof properties in which the lens barrel expands and contracts,
A lens driving direction indicating means;
Means for determining the driving direction of the lens;
Water drop detection means;
Has a main power switch to start the imaging device,
When the main power switch is activated,
The lens barrel is
Driven to a second position where the imaging is possible and the imaging device volume is larger than the smallest first position,
The imaging apparatus is characterized by being continuously driven to a third position where the imaging apparatus volume is smaller than that in the second state and stopped.

The present invention of claim 4
In the imaging device according to claims 1 to 4,
An image pickup apparatus having a pressure valve for adjusting an internal pressure of the image pickup apparatus.

  According to the present invention, in an imaging device in which the lens barrel advances and retreats with respect to the camera body, it is possible to shoot in a large amount of water droplet environment such as underwater or rain without adding new parts to improve waterproofness. An imaging device that can be provided can be provided.

Sectional drawing of the imaging device of 1st Example Top view of the image pickup apparatus of the first embodiment Rear view of the image pickup apparatus of the first embodiment Sectional drawing of the sealing member of 1st Example Enlarged view of the retracted state of FIG. 1A part of the first embodiment Wide state enlarged view of FIG. 1A section of the first embodiment Tele state enlarged view of FIG. 1A part of the first embodiment Enlarged view when the pressure difference between inside and outside of part A of the first embodiment is within 0.2 atm. Enlarged view when the internal pressure of part A of the first embodiment is 0.2 atmospheres higher than the external pressure Enlarged view when the internal pressure of part A of the first embodiment is lower than the external pressure by 0.2 atmospheres or more Flow chart of driving of image pickup apparatus of first embodiment Graph of change in internal pressure of imaging device of first embodiment Graph of change in internal pressure of imaging device of first embodiment

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  The first embodiment will be described below with reference to FIGS.

  FIG. 1 is a cross-sectional view of an essential part of an imaging apparatus including a lens barrel and a camera showing a first embodiment of the present invention.

  The image pickup apparatus of this embodiment has a zoom lens barrel, and this zoom lens barrel is configured to include a fixed frame 10 that is integrally attached to the camera body 1, and is an upper half portion in FIG. Indicates a state where the zoom lens is moved to the wide position, and a lower half portion indicates a state where the zoom lens is moved to the tele position.

  The image pickup apparatus includes the zoom lens barrel, the front cover 2 that covers the camera body 1, the rear cover 3 that covers the rear part, and the back cover 4, and the main parts thereof. The zoom lens barrel 80 is rotatably fitted to the outer peripheral surface of the fixed frame 10 and is rotatably fitted to the inner peripheral surface of the fixed frame 10. The first cylinder holding the first lens holding frame 41 that supports the first lens group L1 and the cam barrel 30 made of the first lens frame that is rotated and driven by 20 and moves back and forth in the optical axis direction while rotating. The third lens frame holding the lens frame 40, the second lens frame 50 holding the second lens holding frame 51 supporting the second lens group L2, and the third lens holding frame 61 supporting the third lens group L3. 60, a barrier unit 70 supported by the first lens frame 40, a shutter unit supported by the second lens frame 50, and the like constitute a main part. An image sensor 90 that receives the image formed by the zoom lens is disposed in the camera body 1.

  A waterproof rubber 6 (refer to FIG. 1) made of silicon rubber or the like is fixed between the front cover 2 and the rear cover 3 over the entire circumference, so that light and water droplets between the front cover 2 and the rear cover 3 can be prevented. It is designed to prevent intrusion. Furthermore, a seal member 11 made of silicon rubber or the like is fitted on the inner peripheral surface near the front end of the front cover 2 and the fitting portion at the tip of the fixed frame 10.

  Further, a seal member 12 made of silicon rubber or the like is attached to the inner peripheral surface near the distal end portion of the fixed frame 10, and the inner peripheral surface side of the distal end portion of the cam cylinder 30 is also made of silicon rubber or the like. A seal member 31 is attached. The outer peripheral surface of the cam cylinder 30 and the outer peripheral surface of the first lens frame 40 are provided with a fluorine-based water repellent coating. Therefore, the water-repellent coating and the two seal members 12 and 31 prevent light and water droplets from entering between the fixed frame 10 and the cam barrel 30 and between the cam barrel 30 and the first lens frame 40. Liquid tightness and light tightness are maintained.

  Further, the front lens of the first lens unit L1 supported by the first lens holding frame 41 and the first lens holding frame 41 are fixed with an adhesive. This adhesive also serves as a shield between the first lens holding frame 41 and the lens, thereby preventing water droplets from entering from the front side of the lens.

  Further, as shown in FIG. 1, the front cover 2 has a plurality of vent holes 2a, and the inner surface side of the vent holes 2a is connected to the inside 2f of the image pickup apparatus under certain atmospheric pressure conditions. A small room part 2e is arranged. A water sensor 95 that detects the presence or absence of water droplets is disposed in the small chamber portion 2e.

  FIG. 2 is a diagram showing the upper surface of the imaging apparatus, and a release button 9 is disposed on the right front side of the upper surface of the front cover 2, and a rear outer side corresponding to the release button 9. The rear grip 4b is formed so as to protrude slightly toward the rear. On the front cover 2, one of the vents 2a is disposed.

  FIG. 3 is a rear view of the imaging apparatus, in which a rear liquid crystal screen 4e for displaying a subject image and a reproduced image at the time of shooting and an EVF (electronic viewfinder) 3a are arranged.

  Hereinafter, the ventilation valve will be described.

  This image pickup apparatus is an image pickup apparatus having high airtightness by using many seal members. Therefore, when the lens barrel tip expands or contracts from the wide state in the upper half of FIG. 1 to the tele state in the lower half due to zooming, an air vent inside and outside the imaging device is required to reduce the pressure difference from the outside air. It becomes.

The structure of the vent valve will be described with reference to FIG. 8 which is an enlarged view of A in FIG.
The front cover 2 has an extension 2b and the rear cover 3 has an extension 3b. The two ends are joined to each other to provide a small chamber 2e. From the outside of the imaging apparatus to the small room portion 2e, the two air vents 2a described above are connected to the outside air.

  A pressure valve (elastic plate) in which an internal vent 2c is disposed on the extension 2b inside the front cover 2 and one side of the pressure valve (elastic plate) 101 is fixed on one side by a screw 102 on the small chamber side. 101 closes the internal vent 2c. A sheet-like member 7 through which air passes and water droplets cannot pass is bonded to the opposite side of the internal vent 2c.

  Similarly, the structure of another vent valve will be described. Inside the front cover 2, an internal vent 2d is disposed on the extension 2b, and a sheet-like member 7 through which air passes and water droplets cannot pass is bonded to the small chamber 2e side. Further, a pressure valve (elastic plate) 101 in which one side of the pressure valve (elastic plate) 103 is fixed by a screw 104 closes the internal vent 2d on the inside 2f side of the imaging device.

  The sheet-like member 7 is made by immersing a cloth woven of polyester fibers in a water repellent such as silicon or fluorine and drying it. This sheet-like member 7 usually has a gap between the fibers, and if this gap is not subjected to water repellent treatment, water droplets will invade or permeate in this state. It is about the size. By the way, the waterproof droplet action of the sheet-like member 7 made of the woven fabric subjected to the water-repellent treatment is performed even if many water droplets adhere to the sheet-like member 7. The water droplets gather together to form water droplets that are larger than the eyes of the cloth, and the water droplets are prevented from passing through. Moreover, such a material is a very general material, for example, used as a cloth for a coat.

  The operation of the pressure valve will be described below.

  The operation when the internal pressure inside the imaging device 2f is 0.2 atmospheres or more higher than the external pressure will be described. When the first lens frame 40 is shrunk from the tele state to the wide state by zooming, the air pressure inside the imaging device 2f increases. When the inside of the imaging apparatus reaches 0.2 atmospheric pressure or more from the outside, the pressure valve changes from the state of FIG. 8 to the state of FIG. That is, the elastic plate 101 pressing the inner vent 2c loses the internal air pressure, the tip is separated, and the inner vent 2c opens. Excess air inside the imaging apparatus flows into the small chamber portion 2e through the vent 2c, and further flows out through the vent 2a. When the pressure difference becomes 0.2 atm, the pressure valve (elastic plate) 101 is The vent 2c is closed.

  The operation when the internal pressure in the imaging apparatus 2f is 0.2 atmospheric pressure or more lower than the external pressure will be described. When the first lens frame 40 extends from the wide state to the tele state due to zooming, the air pressure inside the imaging device 2f is lowered. When the inside of the imaging apparatus becomes 0.2 atmospheres or more lower than the outside, the pressure valve changes from the state of FIG. 8 to the state of FIG. That is, the elastic plate 103 pressing the inner vent 2d loses the external air pressure, the tip is separated, and the inner vent 2d is opened. Through this vent 2d, air flows from the outside through the vent 2a to the small chamber portion 2e and through the internal vent 2d into the imaging device interior 2f. When the atmospheric pressure difference from the outside becomes 0.2 atm or less, the elastic force of the pressure valve (elastic plate) 103 is superior to the atmospheric pressure, and the internal vent 2d is blocked.

  Hereinafter, the structure of the seal member will be described.

  The seal member 31 is attached to the distal end portion of the cam barrel 30 that is the first lens frame, and the base portion is attached to press-contact the peripheral surface of the first lens frame 40.

  A seal member 11 is disposed between the fixed frame 2 and the first moving frame 3 which are a pair of lens frames, and a seal member 12 is disposed between the first moving frame 3 and the second moving frame 4. A seal member 12 is disposed between the second moving frame 4 and the lens barrel 5.

  Each of the seal members 31 is a ring-shaped member that can be elastically deformed by silicon rubber or the like for performing light shielding and waterproofing or dripproofing and dustproofing of the gap between the pair of lens frames. One end is bonded and fixed to one lens frame, and the fin portion of the seal member slides in a sealed state in contact with the outer peripheral surface of the other lens frame.

  FIG. 4 is a longitudinal sectional view showing a sectional shape of the sealing member 11 in the axial direction.

  As shown in FIG. 7, the seal member 31 is provided with two lip-shaped fin portions 31a and 31b extending inward, and an annular outer peripheral portion 31c parallel to the axis O ′ that is a fixed portion. Yes.

  The said one fin part 31a has a fin shape which inclines in the front side of an inner peripheral direction and becomes thin gradually in the front-end | tip direction. The other fin portion 31b has a small inclination toward the front side in the inner circumferential direction with respect to the fin portion 31a, is thick, and has a short tip length in the inward direction.

  As described above, one of the features of this embodiment is that the thicknesses of the fin portion 31a and the fin portion 31b are different from the tip length in the inward direction of the axial center O ′.

  Lubricating paint is applied to the rear side surfaces 31e and 31f which are sliding surfaces of the fin portions 31a and 31b. The front indicates the subject side direction when fixed to each lens frame, and the rear side indicates the image sensor side direction when fixed to each lens frame.

  The seal member 31 has an outer peripheral portion 31 c bonded to the cam cylinder 30.

  The cam cylinder 30 to which the seal member 31 is fixed is incorporated in the imaging apparatus. FIG. 5 is an enlarged cross-sectional view of the vicinity of the seal member 31 in the retracted state. The outer diameter of the first lens frame 40 is located on the inner diameter side of the seal member 31.

Here, assuming that the rear outer diameter of the first lens frame 40 is φD1, in the present invention, as shown in FIG. 5, the outer diameter φD2 of the distal end portion 40a of the first lens frame 40 is φD2> φD1.
It is formed to become. In other words, the distal end portion 40a of the first lens frame 40 is formed to have an outer diameter of φD2 that is larger than the middle through the inclined surface 40b.

  When formed in this way, the pressing amount of the seal member 31 interposed between the two lens frames increases in a storage state such as a specific focal length or a retracted state.

  In the retracted state of FIG. 5, the fin portions 31 a and 32 b of the seal member 31 are pressed radially outward by the outer diameter of the tip end portion 40 a of the first lens frame 40, and are in contact with inclination. Therefore, the side surfaces 31e and 31f to which the lubricating coating is applied come into contact with the outer peripheral surface of the front end portion 40a of the first lens frame 40.

  Next, in the wide state of FIG. 6, the first lens frame 40 is in a position extended forward with respect to the cam barrel 30. At this time, both the fin portions 31a and 32b of the seal member 31 are pressed radially outward by the outer diameter of the distal end portion 40a of the first lens frame 40, and are inclined and closely adhered as in the retracted state of FIG. Yes.

  Further, in the tele state of FIG. 7, the first lens frame 40 is further forwarded with respect to the cam barrel 30. At this time, on the inner diameter side of the seal member 31, a portion 40c having a small diameter φD1 of the first lens frame 40 is located. For this reason, the outer diameter portion 40c of the first lens frame 40 is further away from the outer peripheral portion 31c of the seal member 31 than 40a. The tip of the fin portion 31 a of the seal member 31 presses the outer diameter portion 40 c of the first lens frame 40 and is in contact with the inclined portion, but the tip of the fin portion 31 b is the outer diameter portion 40 c of the first lens frame 40. This is a free state without elastic deformation.

  As described above, in the retracted state and the wide state, the two fin portions 31a and 31b of the seal member 31 are in contact with the outer peripheral surface of the first lens frame 40. Even if it passes, it will be blocked by the second fin, and entry can be reliably prevented.

  In the section from the wide end to the tele end, only the tip of the fin portion 31a of the seal member 31 presses the outer diameter portion 40c (diameter φD1) of the first lens frame 40, and the fin is thick and has a high pressing force. Since the tip of the portion 31b is separated from the outer diameter portion 40c of the first lens frame 40, the dustproof and waterproof effect is lower than in the retracted state and the wide end state, but during zooming the first lens frame 40 and The sliding load between the seal members 31 is reduced, and the zoom speed can be increased, the power consumption can be reduced, and the zoom actuator can be downsized.

  In addition, although the example in which the seal member in the seal device of the above-described embodiment is fixed to the outer lens frame side between the pair of lens frames has been shown, the present invention is not limited thereto, and the seal member is fixed to the inner lens frame. Even if a structure in which the fin portion is in sliding contact with the inner surface of the outer lens frame, the same effect can be obtained.

  As described above, the lens barrel can increase the waterproofness of the lens portion at the wide end and at the time of retracting compared to the usage state from the tele end to the front of the wide end. When the camera is carried without the case, or when the main power of the image pickup apparatus is turned on and the camera is in the shooting standby state at the wide end, the waterproof property is further improved. In general, the image pickup apparatus is more in the housed state and the wide end state in the shooting standby than in the shooting state, so that it is possible to ensure waterproofness that matches the mode.

  In the above embodiment, the seal member 31 presses the outer peripheral surface of the first lens frame 40. However, this is because the seal member 31 is fixed to the first lens frame 40 and the cam is the first lens frame. Of course, the cylinder 30 may be configured to be pressed against the inner peripheral surface. In addition, the configuration in which the pressing amount increases in this way may be formed not only in the retracted state but also in the tele state. In this way, it is possible to further improve the waterproof property of the tele state that is frequently used at the time of shooting, and even if the zoom load increases at the tele end, it does not zoom further in the tele direction. There is no particular problem.

  Next, a series of zooming operations will be described.

  The operation of the imaging apparatus will be described using the flowchart of FIG. 11 and the graphs of changes in internal pressure of the imaging apparatus of FIGS. 12 and 13, the horizontal axis represents the time axis, the vertical axis represents the differential pressure of the imaging device internal pressure relative to the imaging device external pressure, the center is the differential pressure zero atmospheric pressure, and the upward direction is a positive differential pressure with a high imaging device internal pressure. The downward direction is a negative differential pressure with a low internal pressure of the imaging apparatus.

  First, when the main power supply of the image pickup apparatus is turned on from the state where the image pickup apparatus is not used, it is determined in step # 101 that the main power supply is turned on, and the process proceeds to step # 103. In Step # 103, the presence or absence of water droplets is detected by the water sensor 95 disposed in the small chamber portion 2e in the imaging device connected to the outside through the vent 2a. It is determined that the imaging device exists in an environment with many water droplets, and the process proceeds to step # 104. In step # 104, the retracting from the retracted position to the wide side is prohibited, and water droplets are prevented from entering the imaging apparatus from the outside.

  On the other hand, if it is detected in step # 103 that there is no water by the water sensor, the process proceeds to step # 105, and the lens barrel is driven from the retracted state to the middle state. At this time, the first lens frame 40 is extended, and the pressure in the image pickup apparatus starts to decrease from point B where the pressure difference between the internal pressure of the image pickup apparatus and the external pressure in FIG. 12 is zero. In order to reach 2 atmospheres or more, the pressure valve 103 shown in FIG. 10 is opened, and external air flows from the outside into the imaging device inside 2f. The pressure reaches the middle state at point D while maintaining the differential pressure at -0.2 atm, and the pressure valves 101 and 103 are closed as shown in FIG. Next, in Step # 106, when the lens barrel starts to be retracted from the middle state to the wide state, the air pressure inside the imaging device 2f increases from point D in FIG. At point F in the wide end state, since the differential pressure is +0.15 atm, the pressure valves 101 and 103 remain closed as shown in FIG. In the state of the seal member 31, both the fin portions 31a and 31b press the outer peripheral surface of the large-diameter tip 40a of the first lens frame 40 as shown in FIG.

  In this state, even when the imaging device is used underwater in an environment where there is much splashing, the seal members 31 and 11 and the waterproofing member are waterproofed by the pressure contact between the two fin portions of the sealing member 31 and the internal pressure of the imaging device being higher than the external pressure. Even if water pressure is applied to the rubber 6 portion, water droplets can be prevented from entering the imaging device.

  In step # 107, it is determined whether or not the photographer has operated the zoom. If the zoom operation is not performed, the process proceeds to step # 120, where the water sensor 95 determines external water droplets. If there is an external water droplet, the process proceeds to step # 121. If one hour has passed since the main power is turned on, the air inside the imaging apparatus escapes to the outside from the joint of each seal member, and the difference between the K points in FIG. The internal pressure of the imaging device is reduced from the pressure +0.2 atm to the differential pressure at point M + 0.05 atm. Therefore, in step # 122, a small retraction zoom drive is performed, and the internal pressure in the imaging device 2f is increased again from the point M to the point N in FIG. By this operation, the internal pressure of the image pickup apparatus can be maintained high, and intrusion of water droplets from the outside is prevented.

  On the other hand, in step # 107, it is determined whether or not the photographer has performed the zoom operation. If the zoom operation has been performed, the process proceeds to step # 108, where the external water droplet determination is performed by the water sensor 95. Proceed to 109. In step # 109, it is determined whether or not the zooming operation instructed by the photographer is in the extension direction. If the zoom operation is in the extension direction, the process proceeds to step # 110 and zoom drive is prohibited. When zooming in the feeding direction is performed under water or in a large amount of splashing environment, the internal pressure of the image pickup device decreases, and there is a possibility that water drops may enter the image pickup device from the joint of the seal member 31 or the like. Therefore, zooming in the feeding direction is prohibited.

  If the zoom operation is in the built-in direction at step # 109, the process proceeds to step # 111 for driving in the direction in which the internal pressure of the imaging apparatus increases, and the zoom operation in the normal retraction direction is performed. It becomes +0.2 atm of S point through R point from Q point.

  The effects of the first embodiment will be described above. The effects of the shape of the seal member 31 and the outer diameter shape of the first lens frame 40 are two of the fin portions 31a and 31b of the seal member 31 in the retracted state and the wide state. Since the sheet is in contact with the outer peripheral surface of the first lens frame 40, even if water droplets, dust or the like passes through the first fin part, it is blocked by the second fin part and can surely be prevented from entering. .

  In the section from the wide end to the tele end, only the tip of the fin portion 31a of the seal member 31 presses the outer diameter portion 40c (diameter φD1) of the first lens frame 40, and the fin is thick and has a high pressing force. Since the tip of the portion 31b is separated from the outer diameter portion 40c of the first lens frame 40, the sliding load between the first lens frame 40 and the seal member 31 is reduced during zooming, the zoom speed is increased, and the power consumption is increased. And a zoom actuator can be reduced in size.

In addition, the effect of the zoom drive control by the arrangement of the pressure valves 101 and 103 and the output result of the water sensor 95 is
(1) According to steps # 103 to 104 of the flowchart, when the main power of the image pickup apparatus is turned on and the environment is already in water or a large amount of water droplets, it is prohibited to extend the lens barrel from the retracted to the wide to prevent water droplets from entering. it can.
(2) When the main power supply of the image pickup apparatus is turned on in an environment with few water droplets by steps # 103 to # 106 of the flowchart and the action of the pressure valve, the internal pressure inside the image pickup apparatus is increased in advance. Can be prevented from entering.
(3) Steps # 107 to 111 in the flowchart and the action of the pressure valve can prevent water droplets from entering the imaging apparatus during zoom driving.
(4) Steps 120 to 122 in the flowchart and the action of the pressure valve cause the air to leak from the gap of the seal member and the like as time passes and the internal pressure decreases. By returning to the internal pressure, water droplets can be prevented from entering the imaging device.

1 Camera body 2 Front cover 2a Vent 3 Rear cover 3a EVF (electronic viewfinder)
4 Back cover 4e Rear LCD screen 5 Lens frame 6 Waterproof rubber 7 Sheet-like member 9 Release button 10 Fixed frame 11 Seal member 12 Seal member 13 Seal member 20 Drive frame 30 Cam cylinder 31 Seal member 40 First lens frame 41 1st Lens holding frame 50 Second lens frame 51 Second lens holding frame 60 Third lens frame 61 Third lens holding frame 70 Barrier unit 80 Zoom lens barrel 90 Image sensor 95 Water sensor 101 Pressure valve (elastic plate)
102 Screw 103 Pressure valve (elastic plate)
104 screws

Claims (4)

In an imaging device having waterproof and drip-proof properties in which the lens barrel expands and contracts,
A lens driving direction indicating means;
Means for determining the driving direction of the lens;
Has water drop detection means,
When the water drop detection means detects a water drop,
An image pickup apparatus that prohibits lens barrel driving in which the internal pressure of the image pickup apparatus decreases with respect to an external pressure.   The imaging apparatus according to claim 1, wherein when the water droplet detection unit detects a water droplet, the lens barrel is driven by an arbitrary amount in a direction in which the volume of the imaging apparatus decreases, and stopped. In an imaging device having waterproof and drip-proof properties in which the lens barrel expands and contracts,
A lens driving direction indicating means;
Means for determining the driving direction of the lens;
Water drop detection means;
Has a main power switch to start the imaging device,
When the main power switch is activated,
The lens barrel is
Driven to a second position where the imaging is possible and the imaging device volume is larger than the smallest first position,
An image pickup apparatus that is continuously driven and stopped at a third position where the image pickup apparatus volume is smaller than that in the second state. The imaging apparatus according to claim 1, further comprising a pressure valve that adjusts an internal pressure of the imaging apparatus.