JP3086862U - Heat dissipation structure of disk drive and heat dissipation structure of electrical equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To use an existing switch holder and the like for heat radiation of electric components, to omit a heat radiation plate which is conventionally required,
Provided are a heat dissipation structure for a disk device and a heat dissipation structure for electric equipment, which facilitate heat dissipation. A switch holder for holding a wiring substrate provided with a tact switch and a circuit element.
A heat radiation plate is omitted by attaching an electric component 14 having a large amount of heat generation, and an air circulation hole 4b is formed in a projecting support portion 4a for fixing the switch holder 6 to the bottom plate 4 of the housing 1, and the front panel 2 side. The cut-and-raised pieces 7a other than the turned-up pieces are protruded toward the opposite side, and a metal plate 8 for inducing static electricity is provided on the top plate 6a side of the housing 1.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an electric device such as an AV device, and more particularly, to a heat dissipating structure of a disk device capable of preventing an element of an electric circuit from being adversely affected by heat dissipated from a heat generating component housed in a housing. And a heat dissipation structure for electric equipment.

[0002]

[Prior art]

 Electrical equipment usually contains various electrical components and electronic elements that make up an electrical circuit in a housing. However, in the case where miniaturization and compactness are required, the electrical components and electronic elements are located close to each other. Provided. However, if an electronic element such as a semiconductor mounted on a printed circuit board is close to an electrical component that dissipates high heat, this thermal effect may cause malfunctions. Various proposals have been made to make this possible.

As one example, a thin module for EL lighting is known (see Japanese Patent Application Laid-Open No. 6-310271). In this device, a circuit component generating a large amount of heat is connected and arranged on the outer periphery of a printed circuit board, and is closely adhered to a heat radiating plate made of metal or the like and having good thermal conductivity. In addition, they are arranged in the outer peripheral direction different from the heat generating element, particularly, in the outer peripheral direction opposite thereto, so that the two elements are separated as much as possible. As described above, since the heating element is separated from the other circuit components and can efficiently radiate heat, the temperature rise of the other circuit components can be prevented.

As shown in FIG. 4, among the AV devices, a DVD player or the like arranges electric components and electronic elements near a disk loader 5 and a switch holder 6 housed in a housing 1. General. In this DVD player, a plurality of press-type input keys are arranged on the outer surface side of a front panel 2 constituting a housing 1, while a switch holder 6 is erected on the inner surface side of the front panel 2. The switch holder 6 is substantially U-shaped and includes left and right side plates and a front side plate, and is formed of a metal plate. The front plate 6d is provided with a number of punched holes, each of which is provided with a cut-and-raised piece.

[0005] These cut-and-raised pieces are bent into about four pieces and protruded toward the front panel 2 side, and hold the four corners of the printed circuit board 2 thereon. The printed circuit board 2 is provided with a tact switch that is turned on by being pressed by the input keys. Further, on the printed board 2, electronic elements made of semiconductors such as transistors and diodes are also mounted. On the other hand, among the electrical components, an electrical component having a large amount of heat, such as a three-terminal regulator, is attached to the heat radiating plate 16 so as not to exert a thermal influence on the electronic element. The heat radiating plate 16 is formed of a metal plate, stands upright between the disk loader 5 and the switch holder 6, and has the three-terminal regulator 14 screwed to one side surface 16a.

[0006]

[Problems to be solved by the invention]

 By the way, in the above-mentioned conventional thin module for EL lighting, a circuit element generating a large amount of heat is connected and arranged on the outer periphery of the printed circuit board so as to increase the distance between them. On the contrary, there was a drawback that electrical equipment was inevitably increased in size. In addition, like the EL lighting thin module, the latter DVD player has a heat radiating plate 16 provided in the housing 1 and the electric component 14 having a large amount of heat generation. Disadvantages, such as an increase in

[0007] The present invention has been made in view of the above-mentioned problems, and an existing switch holder or the like is used for heat radiation of an electric component. A conventionally required heat radiation plate can be omitted, and heat radiation can be easily promoted. It is intended to provide a heat dissipation structure for disk devices and a heat dissipation structure for electrical equipment.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 of the present invention is configured such that a plurality of pressing input keys are arranged on an outer surface of a front panel of a housing, while a metal plate is formed on an inner surface. A switch holder having a large number of cut-and-raised pieces is erected, and a wiring board is held by several of the cut-and-raised pieces protruding toward the front panel side. The wiring board is provided with a plurality of tact switches responsive to the operation of each of the press input keys, mounted with circuit elements constituting an electric circuit, and mounted with an electric component having a large amount of heat generation near the switch holder. In the disk device in which the heat radiating plate is disposed, the electric component is attached to the switch holder, the heat radiating plate is omitted, and the switch holder is fixed to the bottom plate of the housing. An air circulation hole is formed, a cut-and-raised piece other than the one facing the front panel is protruded toward the opposite side, and a metal plate for inducing static electricity is provided on the top plate side of the housing. It is characterized by.

According to a second aspect of the present invention, there is provided a switch in which a plurality of input keys are provided on an outer surface of a front panel of a housing, and a plurality of cut and raised pieces are formed on an inner surface. A holder is erected, and a wiring board is held by several cut-and-raised pieces protruding toward the front panel side of the cut-and-raised pieces, and the wiring board is operated by the input keys. A plurality of switches responsive to the switch, a circuit element constituting an electric circuit is mounted, and a radiator plate on which an electric component having a large amount of heat is attached is disposed near the switch holder. The electric component is attached to a holder, and the heat sink is omitted. The invention according to claim 3 is characterized in that an air flow hole is formed in a projecting support portion for fixing the switch holder to the bottom plate of the housing. The invention according to claim 4 is characterized in that a cut-and-raised piece other than the one directed toward the front panel is projected toward the opposite side. The invention according to claim 5 is characterized in that a metal plate for inducing static electricity is provided on the top plate side of the housing.

[0010]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the illustrated examples. FIG. 1 is a schematic configuration diagram showing a heat dissipation structure of a disk device according to an embodiment of the present invention, FIG. 2 is a perspective view showing a heat dissipation structure of the disk device, and FIG. It is a side view shown in partial cross section. The heat radiating structure of this disk device is applied to a DVD player, and a disk loader 5 and a switch holder 6 are housed in a housing 1. The housing 1 is a substantially rectangular metal box, and a push key 11 group of a display unit and a key input unit is provided on the outer surface side of the front panel 2.

The front panel 2 has a plurality of concave holes 2 a for the push key 4, compression springs are respectively housed in the concave holes 2 a, and the push key 11 is attached to be able to move forward and backward. An elongated through-hole is formed in the front panel 2, and the disk insertion port 5a of the disk loader 5 is opposed to the through-hole. As shown in FIG. 2, the entire switch holder 6 is elongated and includes a top plate 6a, left and right side plates 6b and 6c, and a front side plate 6d, and is integrally formed of a metal material. A screw hole is provided in the top plate 6a to attach the static electricity induction plate 9 thereto. The static electricity induction plate 9 is wide and bent in an L-shape, is formed of a good conductor such as a copper plate, and has a screw insertion hole at one end.

The static induction plate 9 is inserted into the screw hole by inserting the mounting screw 9 from the screw insertion hole with one end contacting the top plate 6a. As a result, the other end extends obliquely upward and comes into contact with the back surface of the top plate 3 when the switch holder 6 is stored in the housing 1. Therefore, even if the switch holder 6 and the housing 1 are electrically connected to each other and static electricity is generated when operating the input key formed of the synthetic resin material, the switch holder 6 side and the top plate 3 side via the static electricity induction plate 9. It is guided to. Therefore, there is no discomfort when the user operates the keys. In addition, since the static electricity induction plate 9 is a wide copper plate, it has excellent heat conduction, and can transfer heat from the switch holder 6 to the housing 1.

The left and right side plates 6b and 6c have legs 6d and 6e extending on the lower side, and a latching piece 6f provided below the front side plate 6d. The leg portions 6d and 6e have lower portions bent in an L-shape to form screw insertion holes, respectively. The lower part of the hooking piece 6f is also bent into an L-shape, and its tip is made narrower. These are supported by a protruding support portion 4a and a hooked portion 4c provided on the bottom plate 4 of the housing 1, respectively. The protruding support portion 4a is formed by protruding two portions of the bottom plate 4 in a mountain shape, and has a screw hole at each top. A plurality of air circulation holes 4b are formed in each of the projecting support portions 4a along the circumferential direction to facilitate air circulation inside and outside the housing 1.

When the switch holder 6 is held, a hook piece 6f is inserted into a hook hole of the hooked portion 4c and hooked, and legs 6d and 6e are attached to the top of each protruding support portion 4a. Place. Then, mounting screws are inserted into the screw insertion holes provided in the legs 6d and 6e, and screwed into the screw holes of the projecting support portion 4a to be fixed. As a result, the switch holder 6 is erected on the inner surface side of the front panel 2 with a required interval. An electric component having a large amount of heat, such as a three-terminal regulator 14, is attached to the left side plate 6b of the switch holder 6. At this time, a screw hole is formed in the left side plate 6b, and a screw is inserted from the screw insertion hole on the three-terminal regulator 14 side and screwed into the screw hole to fix the screw. The three-terminal regulator 14 has three pin terminals 14a connected to a wiring pattern on a printed circuit board 15 disposed on the bottom plate 4 side. As described above, when the three-terminal regulator 14 is attached to the left side plate 6b, heat can be radiated to the switch holder 6.

The switch holder 6 has a plurality of punched holes 7 in the vertical and horizontal directions of the front side plate 6d, thereby forming cut-out pieces 7a. These cut-and-raised pieces 7a hold the printed circuit board 10, and the necessary cut-and-raised pieces 7a are bent toward the front panel 2 according to the size thereof. When the printed circuit board 10 is substantially rectangular as shown by the imaginary line in FIG. 2, about four cut-and-raised pieces 7a are protruded toward the front panel 2 side, and all others are bent to the opposite side. By doing so, the large number of cut-and-raised pieces 7a have the function of fins, and the heat transfer to the switch holder 6 can be radiated to the space inside the housing 1.

The printed circuit board 10 is provided with a tact switch 12 which is pressed by each of the push keys 11 and is turned on. The tact switch 12 includes a movable contact and a fixed contact. The movable contact faces the input key 11 and the fixed contact is connected to a wiring pattern on the printed circuit board 10. Further, an electronic element 13 made of a semiconductor such as a transistor or a diode is also connected to this wiring pattern.

As described above, in the DVD player, when the power switch is turned on and the voltage is supplied to each part of the circuit from the power supply circuit, the three-terminal regulator 14 also starts operating. The terminal regulator 14 is an electric component that generates high heat and gradually rises in temperature. However, since the terminal regulator 14 is attached to the left side plate 6b via a screw, the high heat is transmitted to the switch holder 6 side. The switch holder 6 is made of a metal plate and has a large number of cut-and-raised pieces 7a having the function of cooling fins, so that heat is efficiently dissipated.

The leg portions 6d and 6e of the left and right side plates 6b and 6c are supported by a protruding support portion 4a having an air flow hole 4b, and the switch holder 6 comes into contact with the outside air, thereby promoting heat radiation. You. Further, the metal plate static electricity induction plate 9 is attached to the top plate 6a of the switch holder 6, so that heat can be transferred to the housing 1 side to further enhance the heat radiation effect. Although the disc device and the heat dissipation structure of the electric device have been described as applied to a DVD player, it is needless to say that the heat dissipation structure can be widely applied not only to the AV device but also to various electric products.

[0019]

[Effect of the invention]

 As described above, in the invention of the first aspect of the invention, the heat-dissipating plate is omitted by attaching the electric component having a large amount of heat to the switch holder of the metal plate on which the plurality of pressing input keys are disposed. Therefore, the number of parts of the electric device is reduced, and the manufacturing process is simplified. In addition, an air circulation hole is formed in the protruding support part to which the switch holder is fixed, and the cut-out piece other than the one facing the front panel is protruded toward the opposite side. Since the heat sink is provided on the top plate side of the housing, heat radiation from electric components generating a large amount of heat is promoted, and the circuit elements constituting the electric circuit are prevented from being adversely affected by high temperatures. Further, in the device according to the second aspect of the present invention, since the electric component having a large amount of heat is attached to the switch holder having a plurality of input keys and the heat radiation plate is omitted, the number of components of the electric device is reduced, and There is an effect that the process is simplified.

In the invention according to the third aspect, since the airflow hole is formed in the protruding support portion for fixing the switch holder to the bottom plate of the housing, heat radiation from the electric component having a large heat generation is promoted. Therefore, there is an advantage that a circuit element forming the electric circuit is prevented from being adversely affected by the high temperature. Further, in the invention according to claim 4, since the cut-and-raised pieces other than the one directed toward the front panel are projected toward the opposite side, heat radiation from the electric component having a large amount of heat generation is promoted, There is an advantage that circuit elements constituting the electric circuit are prevented from being adversely affected by high temperatures. According to the invention of claim 5, since the metal plate for inducing static electricity is provided on the top plate side of the housing, heat radiation from electric components having a large amount of heat generation is promoted, and the circuit constituting the electric circuit is formed. There is an advantage that the element is prevented from being adversely affected by high temperatures.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a heat dissipation structure of a disk device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a heat dissipation structure of the disk device.

FIG. 3 is a side view showing a heat dissipation structure of the disk device in a partial cross section.

FIG. 4 is a schematic configuration diagram showing a heat dissipation structure of a conventional disk device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Front panel 4 Bottom plate 4a Projection support part 4b Air circulation hole 6 Switch holder 6a Top plate 7a Cut-out piece 8 Metal plate 10 Wiring board 13 Electronic element 14 Electric component

Claims (5)

[Utility model registration claims] 1. A plurality of press input keys are arranged on an outer surface of a front panel of a housing, and a switch holder made of a metal plate and having a plurality of cut and raised pieces is erected on an inner surface thereof. A wiring board is held by several cut-and-raised pieces protruding toward the front panel side of the cut-and-raised pieces, and the wiring board has a plurality of responsive to each of the pressing input keys. A tact switch is provided, a circuit element constituting an electric circuit is mounted, and a radiator plate on which an electric component having a large amount of heat generation is mounted is disposed in the vicinity of the switch holder. The heat radiation plate is omitted by attaching parts, an air flow hole is formed in a projecting support portion that fixes the switch holder to the bottom plate of the housing, and the switch holder is directed to the front panel side. A heat dissipating structure for a disk drive, wherein a cut-and-raised piece is projected toward the opposite side, and a metal plate for inducing static electricity is provided on a top plate side of the housing. 2. A plurality of input keys are arranged on an outer surface of a front panel of a housing, and a switch holder having a plurality of cut-and-raised pieces is erected on an inner surface thereof. The wiring board is held by several cut-and-raised pieces protruding toward the front panel side of the pieces, and the wiring board is provided with a plurality of switches responsive to the operation of each of the input keys. In an electric device in which a circuit element constituting a circuit is mounted and a radiator plate having an electric component with a large amount of heat generation is disposed near the switch holder, the electric component is attached to the switch holder and the radiator plate is omitted. Heat dissipation structure of electrical equipment characterized by the following. 3. The heat radiating structure for an electric device according to claim 1, wherein an air circulation hole is formed in a projecting support portion for fixing the switch holder to a bottom plate of the housing. 4. The heat radiating structure for an electric device according to claim 2, wherein cut-and-raised pieces other than those directed toward the front panel are projected toward the opposite side. 5. The heat radiating structure for an electric device according to claim 2, wherein a metal plate for inducing static electricity is provided on a top plate side of the housing.