JP2005045025A - Cabinet structure of electronic instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a casing having a good appearance at a low cost by providing a dimension adjusting part for absorbing a dimensional tolerance on the side of an extruded member.
A casing main body 1 of an electronic device includes a press-molding member 2 obtained by press-molding a metal plate and an extrusion-molding member 3 obtained by extruding aluminum, and a part of the extrusion-molded member 3 is pressed. Since the dimension adjusting portion 3d that adjusts the size according to the molding member 2 is provided, even if the extrusion molding member 3 having a large dimensional tolerance is combined with the press molding member 2 having a small dimensional tolerance, a gap or the like is generated between the two due to a dimensional error. In addition, it is possible to easily obtain a casing of an electronic device having a good appearance, and a part of the casing body 1 can be formed using an inexpensive extrusion mold. Since it can shape | mold, the cost reduction of the housing body 1 can be aimed at.
[Selection] Figure 2

Description

  The present invention relates to a housing structure of an electronic device having a heat generating portion.

  Some conventional electronic devices have a heat generating part such as a power supply part.

  In such an electronic device, a heat radiating means is provided in a housing that houses the electronic component so that the heat generated from the heat generating portion is not accumulated, thereby preventing the electronic component from being deteriorated or broken down by heat.

In addition, in order to efficiently dissipate the heat generated from the heat generating portion, an electronic device in which a heat dissipating means is provided in a part of the housing is known (for example, Patent Document 1).
Japanese Patent Laid-Open No. 7-32486.

  The heat dissipating device of the conventional electronic device is a heat dissipating member formed by extrusion using an aluminum alloy or the like, and is fixed to a notch formed on a side plate of a housing with a mounting screw, and the heat dissipating member is formed by a side wall portion sandwiching a space. As a result, the thickness of the side wall portion can be reduced, and by providing the space portion on the side wall, an insulating distance that increases the heat dissipation effect can be secured.

  In addition, aluminum materials have higher thermal conductivity than iron and so on, so they have a high heat dissipation effect, and can be easily obtained with molds with complicated shapes by means such as extrusion, and compared to dies that press-mold steel plates. The mold is also inexpensive.

  However, an aluminum extruded material obtained by extruding aluminum has a much larger dimensional tolerance than a molded product obtained by press-molding a metal plate, and therefore cannot be used in a place where dimensional accuracy is required.

  For this reason, as in the conventional heat radiating device of electronic equipment, a notch is provided in a part of a casing formed by press-molding an iron plate or the like, and a heat-dissipation member formed by extruding aluminum is attached to the notch. The structure is generally adopted.

  In this structure, since it is only necessary to manage the dimensions of the housing side and the mounting holes of the heat radiating member, it is possible to use an extruded aluminum material with low dimensional accuracy.

  However, in this structure, since the entire casing is press-molded and a heat-dissipating member that is extruded is used, there is a problem that processing costs and mold costs increase, and the resulting product is expensive.

  On the other hand, if a molded part made of a metal plate is used as part of the casing and an extruded part made of extruded aluminum is used for the remaining part, the part of the extruded member can be used as heat dissipation means, and press molding Since the number of parts to be reduced can be reduced, effects such as reduction in processing cost and mold cost can be obtained.

  However, as described above, since extrusion molding has a larger dimensional tolerance than press molding, when used in combination with a press molding member with a small dimensional tolerance, if the size of the extrusion molding member is small relative to the press molding member, press molding A problem arises in that a gap is generated between the member and the extruded member and the appearance is remarkably impaired. Conversely, if the size of the extruded member is large with respect to the pressed member, the extruded member is Problems such as inability to install.

  The present invention has been made in order to improve such a conventional problem, and provides a casing structure of an electronic device provided with a dimension adjusting portion that absorbs a dimensional tolerance on an extruded member side, and has a good appearance. Is intended to be obtained at a low cost.

  The present invention is a housing structure of an electronic device in which an electronic component or the like is housed in a housing body formed in a box shape from a metal plate, and the housing body is formed by press-molding a metal plate, The extrusion molding member is formed by extrusion-molding aluminum, and a dimension adjustment unit is provided in a part of the extrusion molding member to adjust the size according to the press molding member.

  With the above configuration, even if a press-molded member with a high dimensional tolerance is combined with an extruded member with a low dimensional tolerance, there is no gap between the two due to a dimensional error, or assembly is not possible. A housing of a simple electronic device can be easily obtained, and a part of the housing body can be molded using an inexpensive extrusion mold, so that the entire housing body is made of a press-molded member. The cost of the housing body can be reduced compared to the case.

  In the present invention, the dimension adjusting portion is formed from a protrusion integrally protruding from the extruded member, and the dimension is adjusted by cutting the extra length portion of the protrusion according to the press forming member. is there.

  With the above configuration, when the extrusion molding member is extruded, the dimension adjusting portion can be formed at the same time. Therefore, the dimension adjusting portion can be formed easily and inexpensively, and the dimension adjusting portion made of aluminum can be easily cut. The extra length part of the dimension adjusting part can be cut with high accuracy according to the dimension of the molded member.

  In the present invention, the dimension adjusting portion is provided so as to protrude from at least one end side of an extruded member that is extruded into a plate shape.

  With the above configuration, the dimension can be set with reference to the other end side of the extrusion member, and the extra length portion of the dimension adjustment portion can be cut, so that the dimension adjustment operation can be performed easily and accurately, and both ends of the extrusion member If the dimension adjusting portion is provided in the projecting area, the dimension adjusting margin increases, so that a large dimension error can be dealt with.

  In the present invention, a plurality of dimension adjusting portions made of protrusions are provided on at least one end side of an extrusion member extruded into a plate shape so as to be spaced apart in the thickness direction of the extrusion molding member.

  With the above configuration, the end of the press-molded member can be fitted between the dimension-adjusted parts that have been dimensionally adjusted to assemble the casing body, so that the rigidity of the assembled casing body is improved, thereby increasing the strength. A high electronic device casing can be obtained.

  In the present invention, a heat radiating means for radiating an electronic component is formed by an extrusion molding member, and a part of the housing body is constituted by the heat radiating means.

  With the above structure, heat generating parts such as power supply parts can be efficiently dissipated by attaching heat generating parts such as power supply parts to the heat radiating means made of aluminum with high thermal conductivity, so that the heat generating parts are deteriorated or damaged by heat. It will be possible to prevent it.

  In the present invention, the front plate, the top plate, and the bottom plate of the housing body are formed by a press-molded member integrally formed by pressing, the rear plate is formed by an extruded member, and both side plates of the housing body are formed by press-molding members. Formed.

  With the above configuration, a part of the housing body can be used as a heat radiation means to dissipate heat generation components and heat stored in the housing body, so there is no need to provide heat radiation means separately in the housing body. The number of points and assembly cost can be reduced.

  As described in detail above, the present invention is configured so that the casing body of the electronic device is composed of a press-formed member obtained by press-molding a metal plate and an extruded member obtained by extruding aluminum, and a part of the extruded member. Since a dimension adjustment unit is provided to adjust the dimensions according to the press-molded member, even if a press-molded member with a large dimensional tolerance is combined with a press-molded member with a small dimensional tolerance, a gap or the like is generated between the two due to a dimensional error. In addition, it is possible to easily obtain a casing of an electronic device with a good appearance and to form a part of the casing body using an inexpensive extrusion mold. Therefore, the cost of the casing main body can be reduced as compared with the case where the entire casing main body is configured by a press-molded member.

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

  1 is a perspective view showing a housing of an electronic device, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a perspective view of a rear plate formed of an aluminum extrusion material, and FIG. 4 is a cross section taken along line AA in FIG. FIG.

  A casing 1 of an electronic device includes a press-molded member 2 formed by press-molding an iron plate or the like, and an extrusion-molded member 3 formed by extruding an aluminum material.

  As shown in FIG. 2, the press-formed member 2 has a front plate 2a, a top plate 2b, and a bottom plate 2c integrally formed in a substantially U-shape, and a box-like shape in which both side plates 2d are fixed to both sides by a fixing tool 4. It has become.

  The front plate 2a, the top plate 2b, and the bottom plate 2c are formed with a large number of slit-like heat radiation holes 5 so that the outside air circulates inside the housing body 1, and the front plate 2a has A front panel 7 provided with terminals 6 and the like is detachably attached, and a plurality of legs 8 are attached to the lower surface of the bottom plate 2c.

  Further, the extrusion molding member 3 is composed of a rear plate 3a covering the rear surface of the housing body 1, and as shown in FIG. 3, the mounting edge 3b fitted on the upper and lower ends, on the lower side of the upper surface plate 2b and on the upper side of the bottom plate 2c. Are formed over the entire length of the end portions, and screw holes 3c are formed in these attachment edges 3b at positions matching the attachment holes 2e formed in the rear end portions of the top plate 2b and the bottom plate 2c. Yes.

  The extruded member 3 formed by extruding aluminum using a mold can be easily formed even in a relatively complicated shape, but has a larger dimensional tolerance after molding than the pressed member 2.

  Incidentally, the dimensional tolerance when a part having the same shape is molded by press molding is about ± 0.1 mm, whereas it is ± 1.3 mm in the case of extrusion molding.

  Therefore, in order to absorb this dimensional tolerance, a dimensional adjusting portion 3d is integrally formed on the rear plate 3a made of the extruded member 3.

  As shown in FIG. 3, the dimension adjusting portion 3d is composed of a protrusion protruding from one end of the rear plate 3a, and is formed over the entire length of the end portion.

  The distance between the mounting edges 3b projecting from both ends of the rear surface plate 3a is made smaller in advance than the distance between the press-formed upper surface plate 2b and the bottom plate 2c, and the length of the dimension adjusting portion 3d. That is, the adjustment allowance α is set to a value that can sufficiently absorb the dimensional tolerance.

  Further, the rear plate 3a is provided with a mounting hole 3e for attaching a heat generating electronic component (not shown) constituting a power supply unit of the electronic device, a slit-like heat radiating hole 3f, and the like by a press or a punching means. If necessary, a heat radiating fin (not shown) is integrally formed on the outer surface during extrusion.

  Next, the operation of the casing structure of the electronic device configured as described above will be described.

  The press forming member 2 of the housing body 1 has a dimensional tolerance of, for example, about ± 0.1 mm by press molding, whereas the dimensional tolerance of the extruded member 3 formed by extruding an aluminum material is, for example, ± 1. When the two are combined, a gap may occur due to a difference in dimensional tolerance or assembly may not be possible.

  Therefore, in the above-described embodiment, the dimension adjusting portion 3d is provided at one end portion, for example, the upper end portion, of the rear plate 3a made of the extruded member.

  In assembling the housing body 1, first, one side plate 2d is attached to the side surfaces of the front plate 2a, the top plate 2b, and the bottom plate 2c in an integrated structure by the fixing tool 4, and then the top plate 2b and the bottom plate 2c. The upper and lower ends of the rear plate 3a made of the extruded member 3 are attached between the rear ends. At this time, due to the dimensional tolerance between the press molded member 2 and the extruded member 3, an error occurs in the mounting dimension.

  However, since the gap between the mounting edges 3b protruding from the upper and lower ends of the rear plate 3a is formed in advance smaller than the dimensional tolerance between the rear ends of the top plate 2b and the bottom plate 2c, the rear ends of the top plate 2b and the bottom plate 2c. In the meantime, the attachment edge 3b of the rear plate 3a is not disabled.

  Next, when the dimension between the rear end of the upper surface plate 2b and the rear surface plate 3a and the dimension between the mounting edges 3b of the rear surface plate 3a are exactly the same, no dimension adjustment is required, and therefore the entire dimension adjusting portion 3d. Cut out with extra length.

  However, such a case is rare and a dimensional error usually occurs between the two.

  Therefore, the extra length portion of the dimension adjusting portion 3d is cut out in accordance with the dimension error between them.

  That is, if the dimension between the mounting edges 3b of the rear panel 3a is 1 mm smaller than the dimension between the rear ends of the top panel 2b and the bottom panel 2c, for example, 1 mm is left from one of the mounting edges 3b, and the remaining dimension adjustment part 3d Cut off the long tip.

  As a result, the mounting dimension between the rear ends of the top plate 2b and the bottom plate 2c matches the total length of the rear plate 3a, so that the upper and lower ends of the rear plate 3a are shown in FIG. 4 between the rear ends of the top plate 2b and the bottom plate 2c. Is fitted into the screw hole 3c of the attachment edge 3b, and the rear plate 3a is assembled by screwing the fixing tool 9 such as a screw inserted from the attachment hole 2e of the top plate 2b and the bottom plate 2c.

  Then, after assembling the electronic components in the housing body 1, the other side plate 2d is attached, and finally the front panel 7 is attached to the front surface of the front plate 2a. As a result, the dimensional tolerance between the press-molding member 2 and the extrusion-molding member 3 can be absorbed by the dimension adjusting portion 3d. Therefore, the extrusion-molding member 3 cannot be assembled to the press-molding member 2, or there is a gap between them. Will not occur.

  The order of assembling the side plate 2d and the rear plate 3a is not limited to the above order. However, if one side plate 2d is not attached to the front plate 2a, the top plate 2b, and the bottom plate 2c of an integrated structure, the top plate 2b. Since the dimension between the rear end of the base plate 2c changes due to the elasticity of the press-molding member 2, it is difficult to accurately determine the extra length of the dimension adjusting portion 3d.

  Moreover, in the said embodiment, although the dimension adjustment part 3d protruded from the one end side of the rear surface board 3a, you may form like the modification shown in FIG.5 and FIG.6.

  That is, as shown in FIG. 5, dimension adjusting portions 3d may be provided at both ends of the rear plate 3a, and the front and rear ends of the mounting edge 3b formed at the end of the rear plate 3a as shown in FIG. Alternatively, the dimension adjusting portion 3d may be provided so as to project the rear end portion of the top plate 2b or the bottom plate 2c between the dimension adjusting portions 3d.

  Further, in the above embodiment, the rear plate 3a is formed by the extruding member 3. However, the same effect can be obtained even if the front plate 2a, the top plate 2b, the bottom plate 2c, and the side plate 2d are formed by the extruding member 3. .

  As described above, when a case body is configured by combining a press-molded member with a small dimensional tolerance with an extruded member with a large dimensional tolerance, the dimensional error between the two can be adjusted by the dimensional adjustment unit, so the appearance is good. In addition to being able to easily obtain a housing for a simple electronic device, it is possible to mold a part of the housing body using an inexpensive extrusion mold. Since the extruded member made of this material has high heat dissipation, it is suitable for a casing of an electronic device having an electronic component that generates heat.

It is a perspective view which shows the housing structure of the electronic device which becomes embodiment of this invention. It is a disassembled perspective view which shows the housing structure of the electronic device which becomes embodiment of this invention. It is a perspective view which shows the extrusion molding member which comprises the housing structure of the electronic device which becomes embodiment of this invention. It is sectional drawing which follows the AA line of FIG. It is a perspective view which shows the modification of the extrusion molding member which comprises the housing structure of the electronic device which becomes embodiment of this invention. It is a perspective view which shows the modification of the extrusion molding member which comprises the housing structure of the electronic device which becomes embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing main body 2 Press molding member 2a Front plate 2b Upper surface plate 2c Bottom plate 2d Side plate 3 Extrusion molding member 3d Size adjustment part

Claims (6)

A casing structure of an electronic device in which electronic parts are housed in a box body formed of a metal plate in a box shape, and the casing body is extruded with a press-molded member obtained by press-molding a metal plate and aluminum. A housing structure for an electronic device, comprising: a molded extruded member; and a dimension adjusting unit for adjusting a size in accordance with the pressed molded member provided in a part of the extruded molded member. The dimension adjusting portion is formed by a protrusion integrally protruding from the extruded member, and the dimension is adjusted by cutting an extra length portion of the protrusion according to the press forming member. The housing structure of the electronic device according to claim 1. The case structure of the electronic device according to claim 2, wherein the dimension adjustment portion is provided so as to protrude from at least one end side of an extrusion member extruded into a plate shape. 3. The electronic device according to claim 2, wherein a plurality of the dimension adjusting portions made of protrusions are provided on at least one end side of an extrusion member extruded into a plate shape and spaced apart in the thickness direction of the extrusion molding member. Equipment housing structure. The case of the electronic device according to any one of claims 1 to 4, wherein a heat radiating means for radiating an electronic component is formed by the extruded member, and a part of the case main body is constituted by the heat radiating means. Construction. The front plate, the top plate, and the bottom plate of the casing body are formed by the press-molded member integrally formed by pressing, the rear panel is formed by the extrusion member, and both the side plates of the casing body are formed by the press-molded member. The housing structure for an electronic device according to claim 1, formed by

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