JP2002209159A - Video apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat radiating effect without a problem on safety and regulation in a state where a power unit is compactly incorporated in an electric appliance. SOLUTION: When incorporating the power unit in the electric appliance, power unit holding metal of a large surface area and shield metal of an inclined shape are fitted to the appliance. Thus, a heat insulating and radiating route is secured. Thus, a fan can easily be eliminated as the result of improving the heat radiating effect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device having a power supply circuit, and more particularly to a device for improving a heat radiation effect as well as an electric shielding effect when a power supply unit is incorporated.

[0002]

2. Description of the Related Art In an electric device having a video processing circuit, I
With the increase in the integration ratio of C and the miniaturization, it is equipped with multiple input terminals, and it is possible to save space while having multiple functions for input signals of multiple formats and multi-function of image quality correction, and the housing is also compact. However, since the amount of heat generated per unit volume increases, the temperature inside the housing is high. In addition, due to the increase in power consumption accompanying multi-functionalization, not only video processing circuits,
Heat generation of the power supply circuit also increases. In order to make the shape of the main body into a space-saving design with good installability by the two heats, a heat dissipation design with a built-in fan is generally used.

[0003]

In the prior art, a method of improving the heat convection by incorporating a fan in order to lower the internal temperature of the electric device has been generally used. The problem was that noise was reduced at the expense of noise reduction.

In addition, the power supply circuit of an electric device is generally designed in accordance with the specifications of the working voltage and current each time a new development is performed. And the design cost is also a problem. In recent years, since a shorter development period and a lower design cost have been demanded, a common power supply circuit has been demanded, and a so-called AC adapter for a commercially available portable device mass-produced in a housing of an electric device. It is required to adopt a power supply unit which is-instead of a power supply circuit.

FIG. 3 shows an example in which a power supply unit as an AC adapter is externally attached to a conventional electric device or the like. In FIG. 3, 1 is a housing of an electric device, 2 is a power supply unit,
Reference numeral 10 denotes a housing upper surface heat radiation hole provided on the upper surface of the housing 1. FIG. 3 takes extra space because the power supply unit is externally attached.

FIG. 4 shows a power supply circuit (not shown) in which primary (charged) and secondary (non-charged) circuits are provided on a power supply substrate.
1 is an example of an electric device incorporating a. In FIG. 4, 1
Reference numeral 1 denotes a radiating fan for exhausting heat in the signal processing circuit and the power supply circuit generated inside the electric device to the outside of the device and radiating the heat. Reference numeral 12 denotes a portion of the upper surface of the housing 1 immediately above the power supply circuit. Parts corresponding to those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 4, a heat radiation hole 10 on the upper surface of the housing is not provided on the upper surface 12 of the power supply circuit on the upper surface of the housing 1 of the electric equipment in order to protect the housing from water drops. When the heat radiating hole 10 on the housing is opened, if water drops leak, the primary (charged part)
The next (non-charged part) may be short-circuited, causing smoke or ignition. As a result, since it is difficult to design an efficient heat radiation, the heat radiation fan 11 is attached to dissipate heat at the expense of noise reduction.

An object of the present invention is to incorporate a commercially available power supply unit into the electric equipment to shorten the development period, reduce the cost of designing and creating, generate heat by driving the video processing circuit, and reduce the power supply unit. The purpose of the present invention is to separate the heat generated by the driving of the device and facilitate heat radiation design.

As a result of efficient heat dissipation design, fanless operation is possible, thereby reducing noise.

[0010]

In order to solve the above-mentioned problems, in a video apparatus having a video processing circuit and a built-in power supply for supplying power to a housing, heat generated by the power supply and the video processing are provided. A shield plate is provided between the image processing circuit and the power supply for thermally insulating heat transfer due to convection between the heat generated in the circuit and the power supply due to the influence of the heat generated in the image processing circuit. It was configured to reduce the temperature rise.

[0011] Further, the shield plate is provided so as to cover the power supply device with an inclined shape descending to the image processing circuit side, and the housing has at least the shield plate covering the power supply device. A plurality of heat radiating holes are provided on the bottom and side surfaces within the range, and the heat generated by the power supply device is convected from the bottom heat radiating hole to the side heat radiating holes to enhance the heat radiation effect and reduce the temperature rise of the power supply device.

The shield plate is provided so as to cover at least a charged portion (primary side) of the power supply device, and the charged portion (primary side) is wetted by water from an upper surface of the power supply circuit of the housing. Side) and non-charged parts to prevent smoke and ignition.

In addition, a plurality of heat radiating holes for radiating heat are provided on the upper surface of the housing, including the position of the upper surface of the power supply device of the housing, and heat generated by driving the video processing circuit is transmitted to the outside of the device. It was configured to facilitate heat radiation.

In general, the power supply circuit is replaced with a power supply unit which is a so-called AC adapter which is used by being externally connected as a power supply device for supplying power to portable equipment.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows the entire configuration of an electric device according to the present invention, FIG. 1 (a) is a plan view thereof, and FIG. 1 (b) is a rear view thereof.

In FIG. 1, reference numeral 3 denotes a power supply unit holding metal for mounting the power supply unit 2 on the bottom surface of the housing 1, and reference numeral 5 denotes an image processing circuit. Reference numeral 4 denotes a shield metal which is a heat shielding plate for eliminating mutual influence of heat generated from the video processing circuit 5 and the power supply unit 2, and is attached so as to cover the power supply unit 2. It is inclined toward. 3 and 4 are denoted by the same reference numerals and description thereof is omitted.

The power supply unit 2 is mounted inside the housing 1 with the power supply unit hold metal 3, and further mounted so as to cover the power supply unit 2 with the shield metal 4. 5 and power supply unit 2
The temperature rise inside the housing 1 caused by the interaction of heat with the heat is reduced. Thereby, the temperature rise of the power supply unit 2 can be reduced.

FIG. 1 shows an embodiment in which a power supply unit 2 is incorporated. Instead of the power supply unit 2, a primary (charging unit) and a secondary (non-charging unit) circuit are provided on a power supply board. When a power supply circuit (not shown) provided with a housing is used, if the upper surface heat radiation hole 10 of the housing is opened in the upper surface 12 of the power supply circuit of the housing 1 as described in FIG. The primary and secondary of the power supply are short-circuited due to leakage or the like. However, since the shield metal 4 is provided so as to cover the power circuit with the shield metal 4, the primary (charged portion) of the power circuit is provided.
-Since the upper part between the secondary (non-charged parts) is shielded, it is possible to prevent smoke and ignition due to a short circuit between the primary (charged part) and the secondary (non-charged part) due to wetness or the like.

2A and 2B show details of a power supply unit and its surroundings in the overall configuration of the electric apparatus according to the present invention shown in FIG. 1. FIG. 2A is a top view and FIG. 2B is a side view. , FIG. 2
2C shows a rear view, and FIG. 2D shows a bottom view.

In FIG. 2, 6 is a rubber spacer, 7 is a bottom heat radiating hole of the housing 1, 8 is a side heat radiating hole of the housing 1, and 9 is a heat radiating path. Parts corresponding to those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

A bottom heat radiating hole 7 is provided on the entire bottom of the housing 1,
By providing the side surface heat radiation holes 8 also on the side surface of the housing 1 on the side of the power supply unit 2, a heat radiation path shown by an arrow 9 is secured to improve the heat radiation effect, and the power supply unit 2 is close to the outside temperature of the housing 1. To be placed in That is, the power supply unit 2
The shield metal 4 is used to shut off the heat from the video processing circuit 5
Since the shield metal 4 has a one-sided inclined shape as described with reference to FIG. 1, when the power supply unit 2 generates heat during use of the device, the shield metal 4 extends from the bottom heat radiation hole 7 of the housing 1 as indicated by an arrow 9. By sucking air and radiating heat from the side heat radiation holes 8 of the housing 1, it is possible to suppress a rise in temperature of the power supply unit 2.

When the power supply unit 2 is mounted, a rubber spacer 6 also serving as a buffer for the power supply unit 2 is attached to the housing 1 so that the bottom heat radiation hole 7 of the housing 1 is not blocked. 2 and fix it with the power unit hold metal 3 with screws. At this time, the power supply unit hold metal 3 uses an aluminum material having excellent thermal conductivity as a member for dissipating heat generated by the power supply unit 2. Of course, if the cost is reduced, copper having better thermal conductivity may be used.

FIG. 2 shows a case where the power supply unit 2 is used. Instead of the power supply unit 2, a primary (charged portion) and a secondary (non-charged portion) circuit are provided on the power supply board described in FIG. It is clear that even when a power supply circuit (not shown) provided with the power supply circuit is used, the temperature rise of the power supply circuit can be suppressed by the heat radiation path as indicated by the arrow 9.

FIG. 5 is an overall view of FIGS. 1 and 2.
As described with reference to FIGS. 1 and 2, the shield metal 4
Since the power supply unit 2 (or the power supply circuit) is protected from leakage of water droplets from the upper surface of the device, the upper heat radiation hole 10 can be opened on the entire upper surface of the housing 1, and the heat generated by the video processing circuit 5 can be easily radiated. It is possible to eliminate the heat radiation fan by the synergistic effect of the above-described image processing circuit 5 by the shield metal and the heat shielding effect for eliminating the mutual influence of the heat generated from the power supply unit 2 (or the power supply circuit). Become.

[0026]

As described above, according to the present invention, the temperature rise due to the interaction between the heat generated in the video processing circuit and the heat generated in the power supply circuit is reduced by shielding the heat with a shield metal, and the power supply is reduced. Incorporates a commercially available power supply unit in the shielded electrical equipment instead of the circuit, shortening the development period and reducing design and creation costs, and improving the heat dissipation effect inside the housing without problems in terms of safety and standards. Can be done.
In addition, fanless operation is possible, and noise can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an electric device according to the present invention.

FIG. 2 is a layout diagram of a power supply unit peripheral portion in the overall configuration of the electric device according to the present invention shown in FIG.

FIG. 3 is a configuration diagram showing a usage example in which a power supply unit serving as an AC adapter is externally attached to a conventional electric device.

FIG. 4 is a configuration diagram of an electric device including a power supply circuit having a primary (charged portion) and a secondary (non-charged portion) circuit provided on a power supply substrate.

FIG. 5 is a configuration diagram of a power supply unit in an electric device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Power supply unit, 3 ... Power supply unit hold metal, 4 ... Shielded metal, 5 ... Video processing circuit, 6
... rubber spacer, 7 ... bottom heat dissipation hole, 8 ... side heat dissipation hole, 9
... heat radiation path, 10 ... heat radiation hole on the top of the housing, 11 ... heat radiation fan, 12 ... immediately above the power supply circuit.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Hasama 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Hitachi Information Technology (72) Inventor Ryuji Kubota 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term in Hitachi Joei Tech Co., Ltd. (reference) 5E322 BA01 CA06 EA11

Claims (6)

[Claims] 1. An image apparatus having an image processing circuit and a power supply device in a housing, wherein the heat transfer by heat generated by the power supply device and the heat generated by the image processing circuit is thermally insulated. An image apparatus, wherein a shield plate is provided between the image processing circuit and the power supply device so as to reduce a temperature rise of the power supply device due to the influence of heat generated in the image processing circuit. 2. The power supply device according to claim 2, wherein the shield plate is provided so as to cover the power supply device with an inclined shape descending toward the image processing circuit, and the housing includes at least the shield plate for connecting the power supply device. 2. The video device according to claim 1, wherein the video device is configured to include a plurality of heat radiation holes on a bottom surface and a side surface in a range to be covered. 3. The shield plate is provided so as to cover at least a primary charging section of the power supply device, and the cover plate is wetted by water from an upper surface of the power supply circuit of the housing.
2. The device according to claim 1, wherein smoke and fire due to a short circuit between the primary charging unit and the non-charging unit are prevented.
The video device according to claim 2. 4. A plurality of heat radiating holes for radiating heat are provided on an upper surface of the housing, including a position of an upper surface of the power supply device of the housing, and heat generated by driving the video processing circuit is radiated to the outside of the device. The video device according to claim 3, wherein the video device is configured to perform the operation. 5. The power supply unit according to claim 1, wherein the power supply unit is a power supply unit that is used by being externally connected as a power supply unit for supplying power to portable equipment. Video equipment. 6. A power supply unit comprising: a holding member for fixing the power supply unit to a bottom surface of the housing; and the holding member is also configured as a heat radiating plate for radiating heat from the power supply unit. The video device according to claim 5, wherein: