WO2003096681A1

WO2003096681A1 - Multipurpose digital camera for home care

Info

Publication number: WO2003096681A1
Application number: PCT/KR2003/000926
Authority: WO
Inventors: Chang Huyn Kim
Original assignee: Chang Huyn Kim
Priority date: 2002-05-11
Filing date: 2003-05-10
Publication date: 2003-11-20
Also published as: AU2003230324A1

Abstract

The present invention relates to a digital camera for medical treatment used in an image system which can allow the user to diagnose diseases at an early stage and properly treat affected parts, by magnifying and observing states or wounds of the skin and scalp and inside states or wounds of the mouth, ears and nose, and displaying the images on a monitor. The multi-purpose digital camera for home care includes: a handle unit including a cylindrical main body having a suitable size for a user’s hand, a CMOS sensor installed in the vertical direction to the front side of the cylindrical main body, and a main board being installed in the horizontal direction at the inside of the cylindrical main body, and having an image memory, tact switches and a USB port, a circuit for electrically connecting the image memory, the tact switches and the USB port being formed on the main body; a lens control unit including an inner casing fixed to the end of the cylindrical main body, an outer casing rotatably coupled to the end of the cylindrical main body, for surrounding the inner casing, a lens system inserted into the inner casing and moved in the forward/backward direction, spiral grooves formed on the inside circumference surface of the outer casing, so that the ends of protruding rods formed on the outer circumference surface of the lens system can be inserted into the grooves, and two guide grooves formed in the inner casing in the length direction, so that the protruding rods can pass through the grooves; and a lens cap unit including a lens cap coupled to the end of the inner casing and bent at a certain angle, a total reflection lens inclined in the lens cap, light emitting diodes for emitting light due to power supplied through the USB port, and a protecting cap coupled to the end of the bent lens cap.

Description

MULTIPURPOSE DIGITAL CAMERA FOR HOME CARE

TECHNICAL FIELD

The present invention relates to a digital camera for medical

treatment used in an image system for magnifying and observing a specific

part of a human body, and more particularly to, a digital camera for medical

treatment used in an image system which can allow the user to diagnose

diseases at an early stage and properly treat affected parts, by magnifying

and observing states or wounds of the skin and scalp and inside states or

wounds of the mouth, ears and nose, and displaying the images on a

monitor.

The present invention relates to a multi-purpose digital camera for

home care which can be easily connected to a personal computer through a

USB port, for allowing the user to magnify and observe the skin or inside of

the ears or the back or neck which is difficult to observe with the naked

eye through a computer monitor, without using a high-priced equipment,

and perform general image communication.

BACKGROUND ART

Fig. 1 is a schematic structure diagram illustrating an image system for professionals, including a digital camera 101 for magnifying and

photographing an image of a human body, and transforming the image into

an electric signal, and an image processing device 105 for receiving the

electric image signal through a cable, and displaying the signal on a

monitor 103. Referring to Fig. 2, the digital camera 101 for the image

system is comprised of a cylindrical body unit 121, and a lens cap 151

removably connected to the front side of the body unit 121. The body unit

121 includes an image magnification lens system 125 for magnifying the

image, and a CCD sensor 123 for transforming the magnified image into an

electric signal. A linear cylinder unit 127 having a magnification conversion

lens system 129 for converting a magnification of the pickup image is

rotatably installed between the lens cap 151 and the body unit 121.

Accordingly, light reflected by an examination object is all reflected

by a total reflection mirror 153 of the lens cap 151, magnified through the

magnification conversion lens system 127 and the image magnification lens

system 125, and transformed into an electric image signal in the CCD

sensor 123. The electric image signal is inputted to a camera control unit

through the cable, and displayed on the monitor 103 of the image

processing device 105.

Figs. 3 and 4 illustrate another example of the digital camera, including a tip unit 230, a connector unit 240 and a hand piece unit 250. A

reflection mirror 239 is installed at the end of the tip unit 230. The

connector unit 240 includes a connector 247 for connecting the tip unit 230

to the hand piece unit 250, and focus control units 245 and 249 for

controlling a focus. Here, a space for a gyrator 245 for controlling the

focus is formed in the connector 247, and a ball receiving hole 248 for a

ball (not shown) which is a part of the focus control unit is formed at the

outer block of the connector 247. Here, a thread is formed at the outer

block of the gyrator 245 to correspond to a thread formed in the focus

control unit 249. The ball positioned in the ball receiving unit 248 is

inserted between a groove of the thread of the gyrator 245 and a groove of

the thread of the focus control unit 249. When the focus control unit 249 is

rotated in the right/left direction, the ball moves in the ball receiving hole

248 in the forward/backward direction, and the gyrator 245 moves in the

connector 247 in the forward/backward direction, to adjust the focus.

The image system for observing the human body is produced for

professionals, incorporating the digital camera, the image processing

device and the monitor. Therefore, the image system is very expensive,

and thus is not suitable for houses, small factories and school laboratories.

Especially, when the user has a wound in his/her mouth, ears, noise, scalp or skin which is difficult to observe with the naked eye, or on his/her back

or neck which is difficult to observe for himself/herself, the user is not able

to easily confirm the wound at home. The general digital camera separately

includes the magnification conversion lens system and the image

magnification lens system. However, an appropriate magnification of lens

cap must be connected to the digital camera in order to adjust the

magnification of the examination object. Accordingly, the general home

user cannot easily use the digital camera.

On the other hand, personal computers have been publicly used at

home, so that the home users can perform image communication through

the digital camera and internet. The present inventor has suggested a

multi-purpose digital camera connected to a USB port of the personal

computer. By using the multi-purpose digital camera, the user can perform

the image communication as well as magnify and photograph the part which

is difficult to observe with the naked eye, and display the image on the

monitor of the personal computer.

DISCLOSURE OF THE INVENTION

An object of the present invention is to provide a multi-purpose

digital camera which can be easily connected to a personal computer through a USB port without using an image processing device and a

monitor, for magnifying and photographing a specific part of a human body,

displaying the image on a monitor of the personal computer, and

performing general image communication.

Another object of the present invention is to provide a

multi-purpose digital camera which can be easily used at home, by

providing various magnifications for multi-purposes, and allowing the user

to easily select a magnification and adjust a focus.

In order to achieve the above-described objects of the invention,

there is provided a multi-purpose digital camera for home care, including:

a handle unit including a cylindrical main body having a suitable size for a

user's hand, a CMOS sensor installed in the vertical direction to the front

side of the cylindrical main body, and a main board being installed in the

horizontal direction at the inside of the cylindrical main body, and having an

image memory, tact switches and a USB port, a circuit for electrically

connecting the image memory, the tact switches and the USB port being

formed on the main board; a lens control unit including an inner casing

fixed to the end of the cylindrical main body, an outer casing rotatably

coupled to the end of the cylindrical main body, for surrounding the inner

casing, a lens system inserted into the inner casing and moved in the forward/backward direction, spiral grooves formed on the inside

circumference surface of the outer casing, so that the ends of protruding

rods formed on the outer circumference surface of the lens system can be

inserted into the grooves, and two guide grooves formed in the inner

casing in the length direction, so that the protruding rods can pass through

the grooves; and a lens cap unit including a lens cap coupled to the end of

the inner casing and bent at a certain angle, a total reflection lens inclined

in the lens cap, light emitting diodes for emitting light due to power

supplied through the USB port, and a protecting cap coupled to the end of

the bent lens cap.

The inner casing includes: a flange unit in which a plurality of

fastening holes and a mounting groove on which the CMOS sensor is

mounted are formed; and a linear unit in which two guide grooves for

guiding the protruding rods of the lens system in the length direction, and

an installation groove in which a power line for supplying power to the light

emitting diodes is installed are formed.

The outer casing includes: a flared tube unit having its diameter

gradually increased to surround the flange unit of the inner casing and be

rotatably coupled to the end of the cylindrical main body; and a linear unit

positioned on the outer circumference surface of the linear unit of the inner casing, wherein spiral grooves are formed on the inner circumference

surface of the linear unit at a certain depth so that the ends of the

protruding rods of the lens system can be inserted into the grooves.

The lens system includes: a cylindrical lens main body for fixing at

least one lens! a plurality of spacers formed on the inner circumference

surface of the lens main body, for separating the plurality of lenses by a

certain distance; and two protruding rods protruded from both sides of the

outer circumference surface of the lens main body.

A plurality of ribs in which fastening holes are formed to fix the

flange unit of the inner casing are formed at the front side of the cylindrical

main body, a plurality of supporting ribs for supporting the main board are

incorporated on the inner circumference surface of the cylindrical main

body, and a hooking protrusion for rotatably coupling the outer casing is

incorporated at the end of the outer circumference surface of the

cylindrical main body.

A ring-shaped coupling ring in which a hooking groove coupled to

the hooking protrusion of the inner casing and an inserting protrusion

inserted into the ends of the guide grooves are incorporated is installed at

the end of the inner casing.

A plurality of inclined groove units are formed in the guide grooves of the inner casing for minute adjustment.

The USB port is installed on the main board, and connected to a

personal computer through a USB cable.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic structure diagram illustrating a conventional

image system for observing a human body;

Fig. 2 is a cross-sectional diagram illustrating a digital camera for

the conventional image system for observing the human body;

Fig. 3 is a perspective diagram illustrating another example of the

digital camera;

Fig. 4 is a perspective diagram illustrating disassembly of the digital

camera of Fig. 3;

Fig. 5 is a perspective diagram illustrating a multi-purpose digital

camera for home care in accordance with the present invention;

Fig. 6 is a perspective diagram illustrating disassembly of the

multi-purpose digital camera of Fig. 5;

Fig. 7 is a cross-sectional diagram illustrating the inside structure

of the multi-purpose digital camera of Fig. 5;

Fig. 8 is an explanatory diagram illustrating the image magnification principle of the multi-purpose digital camera in accordance with the

present invention;

Fig. 9 is a perspective diagram illustrating an inner casing of the

multi-purpose digital camera in accordance with the present invention;

Fig. 10 is a cross-sectional diagram illustrating an outer casing of

the multi-purpose digital camera in accordance with the present invention;

Fig. 11 is a cross-sectional diagram illustrating a cylindrical main

body of the multi-purpose digital camera in accordance with the present

invention;

Fig. 12 is a perspective diagram illustrating an inner casing of the

multi-purpose digital camera in accordance with the present invention;

Fig. 13 is a perspective diagram illustrating another example of the

inner casing in accordance with the present invention;

Fig. 14 is a cross-sectional diagram illustrating one example of a

lens system in accordance with the present invention;

Fig. 15 is a perspective diagram illustrating a lens cap in accordance

with the present invention! and

Fig. 16 is a perspective diagram illustrating a stand for fixing the

multi-purpose digital camera in accordance with the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

A multi-purpose digital camera for home care in accordance with

the present invention will now be described in detail with reference to the

accompanying drawings. Fig. 5 is a perspective diagram illustrating the

multi-purpose digital camera for home care (hereinafter, referred to as

'multi-purpose digital camera'), Fig. 6 is a perspective diagram illustrating

disassembly of the multi-purpose digital camera, and Fig. 7 is a

cross-sectional diagram illustrating assembly of the multi-purpose digital

camera.

Referring to Figs. 5 to 7, the multi-purpose digital camera 10

includes a handle unit 30, a lens control unit 50 and a lens cap unit 70. The

handle unit 30 includes a cylindrical main body 31 having a suitable size for

a user's hand, a CMOS sensor board 42 being installed in the vertical

direction to the front side of the cylindrical main body 31, and having a

CMOS sensor 43 (or CCD sensor), a main board 45 installed in the

horizontal direction at the inside of the cylindrical main body 31, and two

switches 35 and 36 installed on the outer circumference surface of the

cylindrical main body 31.

Here, the CMOS sensor 43 transforms an image magnified through

the lens cap unit 70 and the lens control unit 50 into an electric signal. An image memory 47 for storing the electric image signal, tact switches 44

and 46 for turning on/off the multi-purpose digital camera or light emitting

diodes (LED), and a USB port 49 electrically connected to a personal

computer are mounted on the main board 45. A circuit for electrically

connecting the image memory 47, the tact switches 44 and 46 and the USB

port 49 is also formed on the main board 45. Here, the switches 35 and 36

are installed in the cylindrical main body 31 to contact with the tact

switches 44 and 46 of the main board 45. LEDs 34 for externally displaying

an operation state of the digital camera are installed on the main board 45.

The lens control unit 50 includes an inner casing 20 fixed to the end

of the cylindrical main body 31 of the handle unit 30, an outer casing 60

rotatably coupled to the end of the cylindrical main body 31, for

surrounding the inner casing 20, and a lens system 55 inserted into the

inner casing 20 and moved in the forward/backward direction according to

the rotation of the outer casing 60, for magnifying the pickup image at an

appropriate magnification.

The lens cap unit 70 has a lens cap 71 fixed to the end of the inner

casing 20 and bent at a right angle, a total reflection lens 73 inclined in the

lens cap 71 at a certain angle, a chip type LED board 75 installed at the end

of the lens cap 71, and a protecting cap 78 removably installed at the end of the lens cap 71. In addition, a transparent auxiliary cap 79 sharpened to

observe a narrow hole such as the inside of the ear or noise can be further

installed at the end of the protecting cap 78.

Accordingly, the multi-purpose digital camera 10 picks up an image

through the lens cap unit 70, magnifies the pickup image in the lens control

unit 50 at an appropriate ratio, adjusts a focus, transforms the magnified

image into an electric signal in the CMOS sensor 43, and transmits the

electric signal to the personal computer through a USB cable connected to

the USB port 49 of the main board 45. The personal computer drives

software to display the image on its monitor. If necessary, the electric

image signal is stored in the image memory 47 of the main board 45.

As described above, the multi-purpose digital camera 10 can

magnify and photograph the skin or scalp of the human body, or closely

photograph the inside of the nose or ears which is difficult to observe with

the naked eye, and display the image on the monitor of the personal

computer. Moreover, the multi-purpose digital camera 10 can also be used

for general image communication. Therefore, the multi-purpose digital

camera 10 allows the user to easily select various magnifications. For

example, as shown in Fig. 8, the multi-purpose digital camera 10 has

various magnifications such as xl40, x46.9 and xOO according to a ratio of a distance between an examination object and the lens system 55 to a

distance between the lens system 55 and the CMOS sensor 43 (or CCD

sensor).

As illustrated in Figs. 9 and 10, the multi-purpose digital camera 10

includes a lens motion means comprised of the inner casing 20 and the

outer casing 60, for moving the lens system 55 in the forward/backward

direction. The lens motion means includes two protruding rods 56

protruded from the outside of the lens system 55, two guide grooves 23

formed in the inner casing 20 in the length direction so that the protruding

rods 56 can be inserted and slid into the grooves, and spiral grooves 63

formed on the inner circumference surface of the outer casing 60 at a

certain depth so that the ends of the protruding rods 56 can be inserted into

the grooves 63. Accordingly, when the outer casing 60 surrounding the

inner casing 20 is rotated, the spiral grooves 63 formed on the inner

circumference surface are rotated to pressurize the inserted protruding

rods 56 in the forward/backward direction. In addition, the guide grooves

23 formed in the inner casing 20 restrict a motion direction of the lens

system 55, so that the lens system 55 moves merely in the

forward/backward direction. The ratio of the distance between the

examination object and the lens system to the distance between the lens system and the CMOS sensor is changed due to the horizontal motion of the

lens system 55, to select an appropriate magnification.

As described above, the magnification and focus of the

multi-purpose digital camera 10 are determined by rotation of the outer

casing 60. Therefore, the outer casing 60 needs to be minutely rotated in a

specific position to precisely adjust the focus at a specific magnification.

For example, a number of the spiral grooves 63 formed on the outer casing

60 can be increased, or a plurality of inclined groove units 25 can be

installed in the guide grooves 23 as shown in Fig. 13.

The structure of the multi-purpose digital camera 10 will now be

explained in detail with reference to the accompanying drawings. Fig. 11 is

a perspective diagram illustrating disassembly of the cylindrical main body

31 of the handle unit 30. A plurality of ribs 37 in which fastening holes for

fixing a flange unit 24 of the inner casing 20 and the CMOS sensor board 42

are formed are incorporated at the front side. A plurality of supporting ribs

38 for horizontally installing the main board 45 are formed in the

cylindrical main body 31, and a plurality of fixing ribs 39 for preventing

separation of the USB cable are incorporated at the rear side of the

cylindrical main body 31. A certain length of hooking protrusion 69 is

formed at the front side of the outer circumference surface of the cylindrical main body 31.

Fig. 12 is a perspective diagram illustrating the inner casing 20. A

linear unit 22 having two guide grooves 23 for guiding the lens system 55

and an installation groove 76 formed at a certain depth to install a power

line 74, and a flange unit 24 having a plurality of fastening holes 28 coupled

to the ribs 37 of the cylindrical main body 31 and a mounting groove 26

formed at a certain depth to mount the CMOS sensor 43 are incorporated to

form a T shape. Here, the power line 74 supplies power to LEDs 72 formed

at the end of the lens cap 71. A through hole 29 which the power line 74

passes through is formed at one side of the flange unit 24.

As depicted in Fig. 12, a coupling ring 80 for closing the guide

grooves 23 opened in the forward direction, and coupling the lens cap 71 is

installed at the end of the inner casing 20. The coupling ring 80 is formed in

a ring shape. A hooking groove 87 coupled to the hooking protrusion 27 of

the inner casing 20, an inserting protrusion 83 inserted into the ends of the

guide grooves 23, and a plurality of fixing grooves 85 for fixing the lens

cap 71 are incorporated in the coupling ring 80.

Fig. 13 is a perspective diagram illustrating another example of the

inner casing 20 in accordance with the present invention. A plurality of

inclined groove units 25 are formed in the two guide grooves 23 for guiding the lens system 55. When the inclined groove units 25 are formed in a

specific position for minute adjustment, even if the outer casing 60 is

rotated at the same angle, the lens system 55 moves in the inclined

direction along the inclined groove units 25. As a result, the horizontal

motion distance of the lens system 55 decreases to achieve the minute

adjustment.

Fig. 14 is a cross-sectional diagram illustrating one example of the

lens system 55 in accordance with the present invention. As illustrated in

Fig. 14, the lens system 55 includes four different shaped lenses 51, 52, 53

and 54 and one IR filter 58. The lenses 51, 52, 53 and 54 maintain a certain

interval by a plurality of spacers 59 formed on the inner circumference

surface of the cylindrical lens main body 57. In addition, protruding rods 56

are protruded from both sides of the outer circumference surface of the

lens main body 57.

Still referring to Fig. 10, the outer casing 60 includes a flared tube

unit 66 having its diameter gradually increased to be rotatably coupled to

the end of the cylindrical main body 31, and a linear unit 68 positioned

closely to the outer circumference of the inner casing 20. Spiral grooves

63 are formed on the inner circumference surface of the linear unit 68 at a

certain depth so that the ends of the protruding rods 56 can be inserted into the grooves 63. In addition, a ring-shaped hooking groove 67 rotatably

coupled to the hooking protrusion 69 formed at the end of the outer

circumference surface of the cylindrical main body 31 is formed at the end

of the inner circumference surface of the flared tube unit 66. Accordingly,

the outer casing 60 can be freely rotated when it is coupled to the end of

the cylindrical main body 31.

Fig. 15 is a perspective diagram illustrating the lens cap 71 coupled

to the end of the inner casing 20. The elliptical total reflection lens 73 is

inclined at about 45° in the cylinder bent at the right angle. The

ring-shaped board 75 on which the chip type LEDs 72 are mounted is

installed in a short step unit formed at the end of the lens cap 71. The

protecting cap 78 including a transparent window is installed at the outside

of the board 75. The protecting cap 78 fixes the ring-shaped board 75 and

prevents alien substances from being inputted to the lens cap 71. The

power line 74 is connected to the ring-shaped board 75.

Accordingly, the examination object is closely photographed or a

dark part such as the inside of the ear is photographed by using the light

emitted from the LEDs 72. Here, the LEDs 72 of the board 75 are not

regularly aligned but inclined toward one side, to improve resolution of the

examination object. Therefore, the light emitted from the LEDs 72 is reflected by the examination object, and the pickup image is totally

reflected by the total reflection mirror 73 and transmitted to the lens

system 55. Here, the user adjusts the magnification and focus by

appropriately rotating the outer casing 60. The CMOS sensor 43

transforms the image into an electric signal, and transmits the electric

signal to the personal computer through the USB cable connected to the

USB port 49 of the main board 45. The personal computer drives software

to display the photographed image on the monitor. The image (still image

or motion picture) is stored in the computer or externally transmitted

through the internet.

Fig. 16 is a perspective diagram illustrating a camera stand 90 for

fixing the multi-purpose digital camera 10 in accordance with the present

invention. The camera stand 90 is rotated or fixed to maintain the

multi-purpose digital camera 10 at different angles. That is, the camera

stand 90 includes a fixing base 93 and a rotating base 95. The rotating base

95 is rotatably connected to the fixing base 93. The multi-purpose digital

camera 10 can be fixed at various angles by inserting the handle unit 30 of

the multi-purpose digital camera 10 into a stationary unit 96 of the rotating

base 95. For example, the multi-purpose digital camera 10 can be fixed in

the vertical direction for image communication, and in the horizontal direction to assemble and repair precise components or observe an

experimental sample.

INDUSTRIAL APPLICABILITY

As described above, in accordance with the present invention, the

multi-purpose digital camera is easily connected to the personal computer

through the USB port, for magnifying and photographing the scalp or skin,

or easily observing the inside of the ear or noise, without requiring an

expensive equipment.

In addition, the multi-purpose digital camera allows the user to

select various magnifications. Thus, the user can magnify and photograph a

precise component or experimental sample as well as perform general

image communication.

The user can easily select various magnifications and precisely

adjust the focus by rotating the outer casing in the right/left direction. That

is, the multi-purpose digital camera is easily used by children or

housewives.

Moreover, the multi-purpose digital camera is very simplified, low

priced, and easily maintained and repaired. As a result, the multi-purpose

digital camera can be widely used in houses, small hospitals, small factories producing precise components, or school experimental

laboratories.

Claims

WHAT IS CLAIMED IS:

1. A multi-purpose digital camera for home care, comprising:

a handle unit including a cylindrical main body having a suitable size

for a user's hand, a CMOS sensor installed in the vertical direction to the

front side of the cylindrical main body, and a main board being installed in

the horizontal direction at the inside of the cylindrical main body, and

having an image memory, tact switches and a USB port, a circuit for

electrically connecting the image memory, the tact switches and the USB

port being formed on the main board;

a lens control unit including an inner casing fixed to the end of the

cylindrical main body, an outer casing rotatably coupled to the end of the

cylindrical main body, for surrounding the inner casing, a lens system

inserted into the inner casing and moved in the forward/backward direction,

spiral grooves formed on the inside circumference surface of the outer

casing, so that the ends of protruding rods formed on the outer

circumference surface of the lens system can be inserted into the grooves,

and two guide grooves formed in the inner casing in the length direction, so

that the protruding rods can pass through the grooves; and

a lens cap unit including a lens cap coupled to the end of the inner casing and bent at a certain angle, a total reflection lens inclined in the lens

cap, light emitting diodes for emitting light due to power supplied through

the USB port, and a protecting cap coupled to the end of the bent lens cap.

2. The digital camera of claim 1, wherein the inner casing

comprises:

a flange unit in which a plurality of fastening holes and a mounting

groove on which the CMOS sensor is mounted are formed; and

a linear unit in which two guide grooves for guiding the protruding

rods of the lens system in the length direction, and an installation groove in

which a power line for supplying power to the light emitting diodes is

installed are formed.

3. The digital camera of claim 1 or 2, wherein the outer casing

comprises:

a flared tube unit having its diameter gradually increased to

surround the flange unit of the inner casing and be rotatably coupled to the

end of the cylindrical main body; and

a linear unit positioned on the outer circumference surface of the

linear unit of the inner casing, wherein spiral grooves are formed on the inner circumference surface of the linear unit at a certain depth so that the

ends of the protruding rods of the lens system can be inserted into the

grooves.

4. The digital camera of claim 1, wherein the lens system comprises:

a cylindrical lens main body for fixing at least one lens;

a plurality of spacers formed on the inner circumference surface of

the lens main body, for separating the plurality of lenses by a certain

distance; and

two protruding rods protruded from both sides of the outer

circumference surface of the lens main body.

5. The digital camera of claim 1 or 2, wherein a plurality of ribs in

which fastening holes are formed to fix the flange unit of the inner casing

are formed at the front side of the cylindrical main body, a plurality of

supporting ribs for supporting the main board are incorporated on the inner

circumference surface of the cylindrical main body, and a hooking

protrusion for rotatably coupling the outer casing is incorporated at the

end of the outer circumference surface of the cylindrical main body.

6. The digital camera of claim 1 or 2, wherein a ring-shaped

coupling ring in which a hooking groove coupled to the hooking protrusion

of the inner casing, an inserting protrusion inserted into the ends of the

guide grooves, and a through hole which the power line passes through are

incorporated is installed at the end of the inner casing.

7. The digital camera of claim 1 or 2, wherein a plurality of inclined

groove units are formed in the guide grooves of the inner casing for minute

adjustment.

8. The digital camera of claim 1 or 2, wherein the light emitting

diodes are a plurality of chip type light emitting diodes irregularly aligned

on the ring-shaped board, and receive power through the power line

installed in the installation groove of the inner casing and the USB port.

9. The digital camera of claim 1, wherein the USB port is installed on

the main board, and connected to a personal computer through a USB

cable.