JPH09163193A - Video camera equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain miniaturization and thin profile by surely preventing radiation of a high frequency electromagnetic wave without the need for a shield member. SOLUTION: S digital board 36 of a circuit section is fixed to a metal-made frame 12 of a mechanism deck section by using a conductive machine screw 41. Then the digital board 36 forms a space 42 with respect to the metal-made frame 12 while being fixed with the metal-made frame 12. An electronic element group 45 to generate a high frequency electromagnetic wave is mounted to the space 42. When the electronic element group 45 arranged to the space 42 generates the high frequency electromagnetic wave, the electromagnetic wave is shielded by the metal-made frame 12 and not radiated externally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera device, and more particularly, to a video camera device for preventing adverse effects such as radiation of electromagnetic waves generated from electronic elements or the like constituting an electronic circuit.

[0002]

2. Description of the Related Art A video camera device includes a CCD camera section including a CCD image pickup device, a camera block section for converting an image pickup signal inputted from the CCD camera section into a video digital signal, and a camera block section inputted from the camera block section. A video block unit for processing a video digital signal, an input / output block unit, a recording / reproducing unit including a magnetic head, a circuit unit including a control unit including a microcomputer for controlling these, and a mechanical unit. Has been done.

The mechanism section includes a loading section for a video tape cassette, a magnetic head mechanism for recording a video signal on a magnetic tape housed in the video tape cassette and a reproducing mechanism for the recorded video signal, a drive mechanism for the magnetic tape, It is provided with a metal frame chassis on which a loading mechanism is mounted.

The video camera device is the C of the CCD camera unit.
The image digital signal input from the CD image pickup device is processed by the camera block unit to be converted into a video digital signal, and this video digital signal is sent to the video block unit. In the video camera device, the video digital signal is converted into an image analog signal in the video block unit, and the image analog signal is sent to the magnetic head of the recording / reproducing unit. As a result, the image information is recorded on the magnetic tape housed inside the tape cassette.

In a recent video camera device, a liquid crystal display (hereinafter, referred to as LCD) having a large display section.
There is also provided an electronic viewfinder (hereinafter, referred to as an EVF) including the above, which is configured to directly display a captured image in a large size. In this video camera device, a video digital signal is sent from the video block unit to the input / output block unit, the video digital signal is converted into an image analog signal in the input / output block unit, and the image analog signal is sent to the LCD. By doing so, video shooting is performed while viewing the captured image directly on the EVF.

By the way, in the video camera device,
By mounting the electronic components and electronic element groups that form the above-mentioned circuit section on a multilayer substrate that is laminated and wired in a state of being insulated from each other, the size and thickness of the device have been reduced. In this multilayer substrate, a ground earth layer is generally formed at a substantially central portion in the thickness direction.

In the video camera device, as described above, in the camera block unit and the video block unit or the control unit, for example, electronic parts and electronic element groups for performing display signal control processing and tape speed control processing are high-frequency digital signals. Operated by. The circuit unit that processes the high-frequency digital signal generates high-frequency electromagnetic waves, which causes noise in peripheral devices.

[0008]

Generally, in electronic equipment and the like, as a structure for preventing radiation of high-frequency electromagnetic waves generated from mounted electronic parts, etc., a circuit portion which generates electromagnetic waves is made of a metal shield member. The structure to cover is adopted. On the other hand, the video camera device has been made smaller and thinner, and it has been extremely difficult to secure a space for adopting the above-described structure for disposing the shield member.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a video camera device which surely prevents radiation of high-frequency electromagnetic waves without requiring a shield member, thereby ensuring downsizing and thinning of the device. And

[0010]

SUMMARY OF THE INVENTION A video camera device according to the present invention which achieves this object is provided with a tape cassette loading section and a mechanical deck section on which a magnetic tape drive mechanism and a magnetic head are mounted, and this mechanical deck. The mechanical deck portion, the chassis is formed of a metal plate, and the multi-layer substrate includes a ground ground layer and the chassis. It is characterized in that an electronic element or the like that oscillates a high-frequency electromagnetic wave is mounted on the formed circuit layer.

According to the video camera device of the present invention configured as described above, the electronic parts and electronic element groups that oscillate high-frequency electromagnetic waves are arranged between the ground ground portion and the chassis. It is electromagnetically shielded from and has no adverse effect on the outside.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a video camera device according to the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 to 3, a portable video camera device 1 shown as an embodiment of the present invention includes a mechanical deck section 2, a monitor liquid crystal display 3, a power source section 4, and a power source section 4.
The speaker unit 5, the external terminal unit 6, the microphone unit 7, the operation liquid crystal display 8, the CCD camera unit 9, and the circuit unit 10.
And a housing 11.

The mechanical deck section 2 has a cassette holder for accommodating a tape cassette accommodating an 8 mm wide magnetic tape therein, a drive motor for loading the accommodated cassette tape, and a loading for transmitting a rotational force from the drive motor. Mechanism, magnetic head for recording and / or reproducing magnetic tape, cassette holder, drive motor,
And a metal frame 12 on which the loading mechanism and the magnetic head are integrally mounted.

When the cassette tape is mounted on the cassette holder, the magnetic tape comes into contact with the magnetic head as the loading mechanism operates and is pulled out from the inside of the cassette tape. In this state, the tape drive mechanism is driven by the rotational force of the drive motor being transmitted to the tape drive mechanism, and the magnetic tape is further drawn and wound.

The monitor liquid crystal display 3 has a liquid crystal screen 13
And a drive circuit 14 for the liquid crystal screen 13 and a menu button 15 for selecting the display contents of the liquid crystal screen 13. This monitor liquid crystal display 3
An image analog signal sent from a circuit section 10 described later is processed in a drive circuit 14 to display a video imaged on the liquid crystal screen 13 or display a reproduced video image. Therefore, the monitor liquid crystal display 3
Is used as a finder when shooting is performed by the video camera device 1, and is also used as a monitor for viewing a reproduced image.

The power supply unit 4 is constructed so as to include a removably attached rechargeable battery 16 and a terminal 17 for supplying electric power from the battery.

The speaker unit 5 includes a speaker 18 for reproducing the recorded sound together with recording, and a power supply means 19 such as a lithium-vanadium secondary battery for supplying power for storing a certain amount of information such as date and time. External power input terminal 20 connected to an external power source, and these power supply means 19
And a substrate 21 on which the external power input terminal 20 is arranged.

The power supply means 19 can always supply a constant amount of power, and stores information such as date and time in a storage element or the like even when the main power is off or the battery 16 is not attached. Continue to supply power.

The external terminal section 6 operates an input / output terminal section 22 for connecting to an external display means such as a television via a cable or the like (not shown), and a function for correcting backlight against image pickup. And a button row 23 for.

The microphone section 7 includes a pair of stereo microphone sections 24 for collecting external sound at the same time as recording, an amplifier section 25 for amplifying the sound collected by the stereo microphone section 24, and a remote control signal for remote control operation. And a remote control light receiving unit 26 for detecting the.

The operation liquid crystal display 8 displays the operation state of the video camera device 1, for example, the camera mode and the video mode, and the display screen 28 for displaying the functions of the operation buttons 27 which will be described later. It is provided with operation buttons and 27 arranged corresponding to the displayed functions, a power / recording switch 29, and an automatic adjustment dial 30 for performing exposure setting and automatic focusing suitable for the subject and shooting conditions. There is.

The power / recording switch 29 has a function of switching the main power on or off and a function of switching between a camera mode and a video mode. Here, the camera mode is a setting for displaying a subject imaged by the CCD camera unit 9 described later on the liquid crystal screen 13 and recording it on a magnetic tape. The video mode is a setting for reproducing the image analog signal recorded on the magnetic tape and displaying it on the liquid crystal screen 13.

The CCD camera unit 9 includes an image pickup lens 31 and
The image pickup device includes a CCD 32, which is an image pickup device, and a hand shake correction sensor 33 that detects a shake when a handheld image is picked up and corrects an image disturbance. CCD camera section 9
Takes an image of a subject through the imaging lens 31 and CCD 32
Is converted into an input digital signal by. At this time, the hand shake correction sensor 33 detects the direction and magnitude of the shake of the video camera device 1 and converts it into a corrected digital signal.
The input digital signal and the corrected digital signal are sent to the circuit unit 10 whose details will be described later.

The circuit section 10 is provided with a master clock and is connected to the CCD camera section 9 described above.
A clock oscillation board 34 for relaying the input digital signal and the corrected digital signal transmitted from the digital camera 36, and a digital board 36 for processing the input digital signal, which is connected by a so-called board-to-board connector via the clock transmission board 34 and the connector 35. And an analog board 37 which is connected to the digital board 36 by a board-to-board connector to convert a digital signal into an analog signal and which sends an image analog signal to the monitor liquid crystal display 3 and the speaker section 5 described above. Composed.

In the case 11, the CCD camera section 9 is arranged on one of the upper corners on the front surface, and the microphone section 7 is arranged on the substantially central area on the upper side of the front surface.

On the front surface side of the housing 11, a grip portion 38 having a semi-circular bulge is formed on the side opposite to the CCD camera portion 9. Also, the housing 11
A grip belt 39 supported by the upper end and the lower end of the grip portion is provided in the. The video camera device 1
From the back side of the housing 11, the palm is passed through the space formed between the side surface where the grip portion 38 is formed and the grip belt 39, and is supported by the user. In the video camera device 1, since the grip portion 38 is formed so as to have a bulge, the user can easily grip it with the palm, and the palm portion is provided in the space formed by the side surface portion of the housing 11 and the grip belt 39. It is easy to carry because it is supported simply by passing it through.

A zoom operation section 40 is arranged on the upper side of the grip section 38. This zoom operation unit 4
0 controls the zoom of the imaging lens 31 of the CCD camera unit 9 by being moved along the arc surface of the grip unit 38. Since the zoom operation unit 40 is provided above the grip unit 38, it can be easily operated with the index finger or the like while the video camera device 1 is supported by the palm.

On the upper surface of the housing 11 and above the grip portion 38, an automatic adjustment dial 30 formed in a circular shape as a whole is rotatably mounted. Since the automatic adjustment dial 30 is attached near the upper portion of the grip portion 38, it can be easily operated when the video camera device 1 is used.

A display screen 28 is formed on the housing 11 in a substantially central region of its upper surface. Further, a plurality of operation buttons 27 are arranged near the display unit. The operation button 27 has a role of a button for reproducing, recording, etc. for activating a recording and / or reproducing apparatus housed in the housing 11, for example. Therefore, for example, the operation button 2
When the recording button, which is one of 7, is pressed and operated, the recording and / or reproducing apparatus in the housing 11 is activated,
The subject is imaged by the CCD camera unit 9, and the liquid crystal screen 1
The video imaged in 3 is displayed.

On the display screen 28, the function of each operation button 27 is displayed in correspondence with the position of the operation button 27. Therefore, it is easy to identify which function the video camera device 1 is used to operate.

In the video camera device 1 configured as described above, the digital board 36 of the circuit section 10 is mounted on the metal frame 12 of the mechanical deck section 2 by using conductive screws 41 as shown in FIG. It is fixed. The digital board 36 forms a space 42 between the metal frame 12 and the metal frame 12 in a fixed state.

The digital substrate 36 is composed of a base portion 43 made of an insulating material and a conductive multi-layer wiring portion 44. In the digital board 36, the base portion 43 is formed in a generally rectangular shape, and the electronic element group 45 is mounted on the surface portions 46A and 46B. The wiring portion 44 includes six layers of wirings L1, L2, L3, L4, L5 and L6 formed in parallel with the surface portions 46A and 46B of the base portion 43. The electronic element group 45 arranged on the surface portion 46A is connected by the wirings L1, L2, and L3 to form a circuit pattern. Electronic element group 45 disposed on the surface portion 46B
Are connected by wirings L5 and L6 to form a circuit pattern. The wiring portion L4 is formed to extend into the base portion 43 as a ground earth, and one of the electronic element groups 45 mounted on the surface portions 46A and 46B that requires grounding is conducted.

The metal frame 12 is formed in a substantially rectangular shape so as to be slightly larger than the above-mentioned digital board 36, its peripheral edge portion has a rising shape, and its leading edge portion forms a flange portion. It is configured. As a result, the metal frame 12 forms a space 42 between itself and the digital board 36 while being positioned with respect to the digital board 36. At this time, the metal frame 12 and the digital board 36 are fixed to each other by the screws 41.

The screw 41 is made of a material such as a metal having conductivity, and the surface portion 4 is formed so as to penetrate the digital substrate 36.
The metal frame 12 and the digital board 36 are fixed by being inserted from the 6A side and penetrating the wiring portion L4. Therefore, the current grounded to the wiring L4 flows to the metal frame 12 via the screw 41.

As described above, the surface portion 46B of the digital board 36 forms the space portion 42 sealed by the metal frame 12 and the screw 41. This space 4
2 is provided with an electronic element group 45 for generating a high frequency electromagnetic wave. As a result, when the electronic element group arranged in the space 42 generates a high frequency electromagnetic wave, the electromagnetic wave is shielded by the metal frame 12 and is not radiated to the outside.

Although not shown, the digital board 36 employs a so-called board-to-board connector style via a connector 35 when connected to the clock oscillation board 34. That is, the digital board 36 and the clock oscillation board 34 are connected by fitting a plurality of pins provided in parallel with the clock oscillation board 34 in two rows and the pin receivers provided on the digital board 36. .
At this time, one row of the pins is protrudingly provided on the metal frame 12 side. The row of pins protruding on the side of the metal frame 12 are electronic element groups 4 that generate high-frequency electromagnetic waves.
It is connected to the wiring connected to 5. Therefore, the pins arranged in a row on the metal frame 12 side generate high-frequency electromagnetic waves, but are shielded by the metal frame 12 and do not radiate high-frequency electromagnetic waves to the outside.

In the video camera device 1 according to the present invention configured as described above, the image signal is processed as shown in FIG.

The video camera device 1 includes a CCD camera section 9
An image digital signal captured from the camera block unit 51
At the video block 5
Send to 2. In the video block unit 52, the video digital signal displays a recorded analog signal transmitted to the magnetic head of the mechanical deck unit and an image on a display device such as a television outside the monitor liquid crystal display 3 or the video camera device 1. It is converted into an image analog signal to be transmitted to the input / output block unit 53.

The video camera device 1 is connected to an external display device such as a television and can input an image analog signal from the input / output terminal 54 without passing through the CCD camera portion. At this time, the image analog signal input from the input / output terminal 54 is transmitted to the input / output block unit 53, is transmitted from the input / output block unit 53 to the monitor liquid crystal display 3, and is a recording analog for recording on a magnetic tape. It is sent to the video block section 52 for conversion into a signal.

The signal flow described above is controlled by the microcomputer 57. This microcomputer 57 is SIRCS
It is controlled by (remote operation signal) 56, LANC (external input / output section of control signal) 55, operation keys 58 such as operation buttons 27, and control signals from the mechanical deck section 2 for detecting the tape cassette mounting state and the like.

As described above, in the video camera device 1 according to the present invention, the electronic element group 45 for generating a high frequency electromagnetic wave.
Is disposed in the space 42 between the metal frame 12 and the digital substrate 36 to prevent electromagnetic waves from being shielded by the metal frame 12 and radiated to the outside. However, the present invention is not limited to the one having the above-described configuration, and the electronic element group 45 that generates a high frequency electromagnetic wave may be covered with a material that can shield the electromagnetic wave.

That is, in the video camera device 1, a board having an electronic element group 45 that does not generate high-frequency electromagnetic waves, such as the analog board 37, is disposed on the surface 46A side of the digital board 36, and the surface 46A has high-frequency electromagnetic waves. It is possible to arrange the electronic element group 45 for generating by this,
The electronic element group 45 for generating high-frequency electromagnetic waves arranged on the surface portion 46A does not radiate the electromagnetic waves to the outside because the electromagnetic waves are shielded by the analog substrate 37.

[0044]

As described in detail above, according to the video camera device of the present invention, the electronic element group for generating a high frequency electromagnetic wave is mounted in the space between the frame chassis and the ground ground. , So that it does not radiate high frequency electromagnetic waves to the outside. Therefore, the video camera device does not require a member such as a shield member that shields the electronic element group. As a result, the video camera device can reduce the number of components while maintaining the shielding ability against high frequency electromagnetic waves, and can be downsized and at the same time cost reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a front portion of a video camera device according to the present invention.

FIG. 2 is a perspective view of a rear portion of the video camera device.

FIG. 3 is an exploded perspective view of the video camera device.

FIG. 4 is a partial cross-sectional view of a main part of the video camera device.

FIG. 5 is a block diagram showing a signal flow in the video camera.

[Explanation of symbols]

 1 Video Camera Device 2 Mechanical Deck Section 10 Circuit Section 12 Frame Section 34 Clock Oscillation Board 36 Digital Board 37 Analog Board 42 Space Section 43 Base Section 44 Wiring Section 45 Electronic Element Group

Claims (3)

[Claims] 1. A mechanical deck section provided with a tape cassette loading section and having a magnetic tape drive mechanism and a magnetic head mounted thereon, and a multi-layer board having an electronic element group mounted facing the mechanical deck section. The mechanical deck has a chassis formed of a metal plate, and the multi-layer substrate has an electronic element or the like that oscillates a high-frequency electromagnetic wave in a circuit layer formed between the ground ground layer and the chassis. A video camera device characterized by the following. 2. The video camera device according to claim 1, wherein the multi-layer substrate is a digital multi-layer substrate. 3. The video camera device according to claim 2, wherein the digital multi-layer substrate is arranged between the analog multi-layer substrate and the frame chassis.