JP4315164B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device in which operation stability is improved particularly in a large electronic device.

  Conventionally, there is EMI (Electromagnetic Interference) as an obstacle to operation stability in electronic devices. For example, many electronic devices are equipped with a CPU. A high frequency clock is generated in the device, and other electronic blocks (circuits) in the device are controlled based on this clock. For this reason, the clock may affect other devices. In addition, since there is a path for supplying the clock to another electronic block, noise (hum noise, high-frequency noise) from other electromagnetic devices (for example, a power circuit or a mobile phone in the same device) in this path. It is easy to receive. Therefore, it is required to take EMC measures to achieve EMC (Electromagnetic Compatibility).

  Further, as measures against the strength of the exterior of the electronic device, firstly, increasing the thickness of the exterior member, and secondly, using a strong exterior member such as a metal can be considered. Especially for large electronic devices, some measures are required because the main body is heavy. For example, there is a conventional one that employs wood as an exterior member as the first countermeasure. As a second countermeasure, there is one in which an aluminum honeycomb structure is adopted in the exterior member.

  It should be noted that there is no prior art document information to be disclosed because there is no document known invention related to the present invention that the applicant knows at the time of filing the patent.

  The wooden exterior member is lighter than metal, strong and easy to process, but cannot take any EMI countermeasures. In addition, the aluminum honeycomb structure is lighter and stronger than iron, and can take measures against EMI to some extent. However, the exterior member having the honeycomb structure is configured such that the honeycomb member is sandwiched between two plates and the contact surface between the plate and the honeycomb member is fixed with an adhesive. For this reason, when a screw hole or the like is made in the exterior member, the adhesive is peeled off around the screw hole to weaken the strength, and it is difficult to ensure the conductivity between the two plates. May become an antenna, and radio waves may enter from outside or leak out to the outside.

  An object of the present invention is to provide an electronic device that is resistant to twisting and bending even with a large size and that is further provided with EMI countermeasures.

The electronic device according to claim 1 is an electronic device in which an upper surface portion, a lower surface portion, and a side surface portion made of metal are surrounded in all directions by a solid angle of 360 degrees, and an electronic device component is internally provided therein. The bottom plate is made of a metal material, and is composed of a component installation plate, a base plate, and a spacer material provided between the component installation plate and the base plate. Thereby, since the metal spacer material is interposed between the metal component mounting plate and the base plate of the bottom plate, the secondary sectional moment of the bottom plate itself is increased, and the entire electronic device is also robust. Moreover, since each part of a baseplate is metal, the EMI countermeasure is taken. The spacer material is formed by extrusion molding, and has a long constant width and a constant thickness and is parallel to the front-rear direction. That is, since it is extrusion molding, it can be made into a fixed shape along the front-rear direction, and the air flow in the flow path guide portion formed between the spacer members becomes smooth, and as a result, the air heat dissipation is improved. Furthermore, the stability of the strength can be obtained by the constant width and the constant thickness. The plurality of legs are arranged so as to intersect with the spacer material, and the entire bottom plate is resistant to torsion by the spacer material and the leg material.

According to the electronic device of the first aspect, since the metal spacer material is interposed between the metal component mounting plate of the bottom plate and the base plate, the secondary sectional moment of the bottom plate itself is increased, and the electronic device The whole is also robust. Moreover, since each part of the bottom plate is made of metal, EMI countermeasures can be taken. Furthermore, since the spacer material is formed by extrusion molding and is parallel to each other in the longitudinal direction with a long constant width and constant thickness, the air flow in the flow path guide portion formed between the spacer members becomes smooth. As a result, air heat dissipation is also improved. Furthermore, the stability of the strength can be obtained by the constant width and the constant thickness. Further, the entire bottom plate is resistant to torsion by the spacer material and the leg material intersecting with the spacer material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a main part of a mixer device as an electronic apparatus according to an embodiment, and FIG. 2 is a side sectional view. In the following description, the operator side of the mixer apparatus is referred to as “front”, and the opposite side is referred to as “rear”. FIG. 1 shows a state of the mixer device as viewed from obliquely below the front side, where the right side portion (front side in the figure) of the device is partially crushed and the left side portion is omitted.

  The exterior part of the device body is composed of a bottom plate 1, an operation panel plate 2, a display unit 3, a side plate 4, a back plate 5, a slider box 6 and a partition plate 7 each made of metal. It is. The operation panel plate 2 includes a slider operation surface 21 that covers the upper portion of the slider box 6 and a dial operation surface 22 on the rear side of the partition plate 7. A module component 10 as an electronic device component is internally provided in the exterior portion.

In this way, the module component 10 is surrounded omnidirectionally by a solid angle of 360 degrees by the bottom plate 1, the operation panel plate 2, the display unit 3, the side plate 4, the back plate 5, and the partition plate 7. (Electromagnetic
Countermeasures against electromagnetic interference are taken. In addition, a slide type variable resistance component 20 is housed in the slider box 6, and this slide type variable resistance component 20 is also omnidirectionally surrounded by the solid angle 360 degrees by the slider box 6 and the partition plate 7. Measures are taken. A handrail 8 is attached to the front surface of the slider box 6.

  The bottom plate 1 includes a component installation plate 11, a base plate 12, a plurality of spacer members 13, and a plurality of leg members 14. The component installation plate 11 is an iron plate that is a high permeability material, and the base plate 12 is an aluminum plate that is a high conductivity material. The spacer material 13 and the leg material 14 are formed by extrusion molding of an aluminum material. The spacer 13 and the leg member 14 are the same part, and the cost is reduced by sharing the same part.

  FIG. 3 is a partial perspective view of the bottom plate 1. The spacer material 13 is a long member having a constant width and a constant thickness, and each spacer material 13 is interposed so as to provide a space between the component installation plate 11 (shown by a one-dot chain line) and the base plate 12, The direction (the direction indicated by the arrow 1 in FIG. 3) is uniformly extended with the mixer device in the front-rear direction. This uniform means that the spacer material 13 has a constant width and a constant thickness, and the spacer materials 13 are parallel to each other. Thus, the component installation plate 11 and the base plate 12 are separated from each other, and a flow path guide portion (gap) 15 is formed between them. Further, the component installation plate 11 is formed with a large number of air holes 11a (through holes) arranged at predetermined intervals in a portion where the spacer material 13 is not provided.

  Further, the leg member 14 is disposed on the back surface of the base plate 12 so as to intersect (cross) the spacer member 13, and the leg member 14 is in contact with the device installation surface S (FIG. 2) such as a shelf board. A mixer device is installed. Thus, since the spacer material 13 and the leg material 14 intersect, the entire bottom plate 1 is resistant to twisting. Further, the spacer member 13 and the leg member 14 are respectively formed with two hollow portions 13a and 14a penetrating in the longitudinal direction, thereby making the spacer member 13 and the leg member 14 light and strong. Yes.

  As shown in FIG. 2, a window 51 is formed on the back plate 5 of the device main body so as to communicate with the inside and outside of the device main body, and a fan 30 is attached to the window 51 inside the device main body. Then, by driving the fan 30, between the spacer members 13 and 13 in front of the bottom plate 1, the flow path guide portion 15, the numerous ventilation holes 11 a (through holes) of the component installation plate 11, the inside of the apparatus main body, and the fan A forced air path (an arrow in FIG. 2) is formed in which an airflow is generated through 30 to the window 51. That is, the airflow is directed from the flow path guide portion 15 below the component installation plate 11 to the fan 30 above the component installation plate 11. The back plate 5 is provided with a stopper 52 per wall so that the window 51 is not blocked by a wall surface or the like.

  Here, since the lower part is cooler than the upper part, the spacer member 13, the base plate 12, and the leg member 14 serve as a radiator that releases heat to the device installation surface S side. In particular, in this embodiment, the spacer material 13, the base plate 12, and the leg material 14 are aluminum materials having good thermal conductivity. Therefore, heat can be easily released from the base plate 12 to the apparatus installation surface S side. Moreover, since a space is created between the base plate 12 and the apparatus installation surface S by the leg material 14, the heat dissipation effect of the base plate 12 is also enhanced.

  Thereby, the spacer material 13, the base plate 12, and the leg material 14 can be maintained close to room temperature, and the room temperature is reached. Therefore, the air current passing through the flow path guide portion 15 in contact with the spacer member 13 and the base plate 12 enters the device main body from the air holes 11a without being heated, and the entire device main body is cooled. Further, since the flow path guide portion 15 under the component installation plate 11 is an air flow path, dust is not accumulated in the bottom plate 1 due to the air flow, and there is no heat accumulation and heat generation due to dust accumulation. Furthermore, since dust does not collect easily on the upper surface of the component installation plate 11, there is no heat storage and heat generation due to dust accumulation.

  The lever of the slide type variable resistance component 20 housed in the slider box 6 protrudes to the outside from a groove (a knob sliding portion) formed in the slider operation surface 21. And the knob 20a (FIG. 2) is attached to the edge part. On the other hand, air flowing into the flow path guide portion 15 from the front of the bottom plate 1 passes under the slider box 6. In other words, the forced air route is formed from the lower part in the slider box 6 (dissimilar part disposition part). As a result, an air flow similar to the air flow in the forced air route is not generated in the slider box 6, and dust does not accumulate between the slider operation surface 21 and the knob 20a, so that the slide type variable resistance component 20 (slider) fails. Hard to do.

  As shown in FIG. 1, a through hole 6 a that communicates with the inside and outside of the slider box 6 is formed in the lower part of the front surface of the slider box 6. Thus, the slide type variable resistance component 20 (and the inside of the slider box 6) is formed by the natural circulation (convection) of the air in the slider box 6 by the groove (the knob sliding portion) of the slider operation surface 21 and the through hole 6a. Can be air-cooled.

  In addition, the mixer device of the embodiment is a large-sized device, and is often housed and transported in a case when used in a PA tour or the like, and is often used temporarily in a venue as a setting table. For this reason, it will be in the state where a case surface (apparatus installation surface S) block | closes the whole lower surface of a mixer apparatus. However, since the forced air route is formed from the front of the spacer portion (the front of the mixer device), air can be easily taken in and air-cooled.

  Here, since the metal spacer member 13 is interposed between the metal component mounting plate 11 and the base plate 12 of the bottom plate 1, the secondary sectional moment of the bottom plate 1 itself is increased, and the entire electronic device is also used. Become robust. Further, since each part of the bottom plate 1 is made of metal, further EMI countermeasures are taken.

  Since the component installation plate 11 is made of iron and the base plate 12 is made of aluminum as the material of the bottom plate 1, the component installation plate 11 (iron material) can also shield the magnetism, and the base plate 12 (aluminum material). Thus, electromagnetic waves can be shielded with certainty, and EMI countermeasures can be further strengthened. In addition, since the component installation plate 11 is made of iron, screw holes and the like formed in the component installation plate 11 are robust, and it is easy to attach a substrate or the like that incorporates the module component 10. Further, since the base plate 12 is made of an aluminum material that is softer than the iron material, even if a processing jig such as a drill comes into contact with the base plate 12 when processing a screw hole or the like on the component installation plate 11, the processing jig is damaged. It is possible to prevent, and it is easy to attach a substrate or the like into which the module component 10 is incorporated.

  In the embodiment, a large number of module parts 10 are provided side by side in the lateral direction of the mixer device (direction perpendicular to FIG. 2) corresponding to the large number of input sources of the mixer. A long bus line substrate 40 is disposed in the horizontal direction of the mixer device on the component installation plate 11, and each module component 10 is commonly connected to the bus line substrate 40 by a connector. A bus bar 45 made of a long copper plate extending in the lateral direction is disposed at the center of the bus line substrate 40 on the component installation plate 11 side. And in addition to the effect | action of the iron component installation board 11, the EMI countermeasure is further strengthened with respect to the bus line by this bus bar 45. That is, since the area of the current path formed by the signal line of the bus line substrate 40 and the bus bar 45 is configured to be small, it is difficult to form a magnetic circuit that goes in and out of this plane, so that EMI is reduced. It doesn't happen as much as possible. As a result, the effect of not being affected by magnetism (hum noise) is generated.

  In the above embodiment, the hollow portion 13a is formed in the spacer material 13 and the spacer 13 itself is light and strong. However, as shown in FIG. 3, the side surface 13b (vertical portion) of the spacer material 13 is used. Alternatively, a through hole 13c (illustrated by a two-dot chain line) communicating with the hollow portion 13a may be formed. In this case, the hollow portion 13a also becomes an air flow path by a fan or the like, and by passing outside air through the hollow portion 13a and the through hole 13c, the effect of keeping the air passing through the bottom plate 1 at a room temperature is increased. The air cooling effect is enhanced, and heat is not trapped in the electronic equipment.

  Further, in the embodiment, the lower surface portion 6b of the slider box 6 is a surface slightly inclined upward from the front end portion of the spacer portion to the front, and a trumpet type or a horn type is formed by the lower surface portion 6b and the device installation surface S. It is an air introduction part. Thereby, the front (the front of the spacer member 13) of the spacer part which introduces air is not blocked by an object, and air can be introduced.

  In addition, a number of through holes that communicate with the inside and outside of the slider box 6 may be provided in the lower surface portion 6 b of the slider box 6. Thereby, air cooling can be performed by natural circulation (convection) of air by the groove (pick-and-slide part) of the slider operation surface 21 and the through hole. In this case, air easily flows into the through-hole due to the airflow flowing toward the spacer portion along the lower surface portion 6b of the slider box 6 serving as the air introduction portion, and promotes the natural circulation rather than forced air cooling. be able to. Even in the natural circulation promoted by this air flow, the wind pressure is weak, and dust and dust are not sucked up or taken in from the through hole, so that dust does not collect between the slider operation surface 21 and the knob 20a.

  In the embodiment, the component installation plate 11 is an iron base plate 12 is an aluminum material, but at least one of the component installation plate 11 and the base plate 12 is a high permeability material such as an iron material, and the other is a high material. In the case of a metal that is not a magnetic permeability material, either of the other may be a high magnetic permeability material. In addition, when at least one of the component installation plate 11 and the base plate 12 is a high conductivity material such as an aluminum material and the other is a metal that is not a high conductivity material, the other is also a high conductivity material. Any of them may be used.

  In the above embodiment, the mixer device has been described as an example. However, it goes without saying that the present invention can be applied to other various electronic devices (particularly, large devices).

It is a principal part perspective view of the mixer apparatus of embodiment of this invention. It is a sectional side view of the mixer apparatus. It is a partial perspective view of the bottom plate of the mixer device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Bottom plate, 2 ... Operation panel board (upper surface part), 3 ... Display part (upper surface part), 4 ... Side plate (side surface part), 5 ... Back board (side surface part), 7 ... Partition plate (side surface part), 10 ... module parts (electronic equipment parts), 11 ... parts installation plate, 12 ... base plate, 13 ... spacer material

Claims (1)

It has an apparatus main body surrounded by 360 degrees of solid angles at the upper surface part, lower surface part, and side part made of metal in all directions, and equipped with electronic device parts inside,
The lower surface of the device body is composed of a bottom plate,
The bottom plate is
A component installation plate made of metal;
A base plate made of metal provided apart from the component installation plate;
A plurality of spacer members made of metal that is interposed and uniformly extended so as to provide a space between the component installation plate and the base plate;
A plurality of leg members arranged to intersect the spacer material on the back surface of the base plate on which the spacer material is arranged ;
Consists of
The spacer material and the leg material are formed by extrusion molding so as to have at least one hollow portion, and the plurality of spacer materials are uniformly extended with the longitudinal direction being the front-rear direction. .

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