JP3077286U - Housing for electrical equipment - Google Patents

Abstract

(57) [Problem] To provide a housing for an electric device having a good appearance in appearance by preventing sinking of a top cover. SOLUTION: A front panel 2 having a tape cassette opening 5 is fitted into a front opening of a bottom case 1 in which a deck main body for a magnetic tape device is built, and a bottom panel 1 is fitted into a top opening of the bottom case 1. This is a housing for an electric device in which the top cover 3 is fitted, and a support piece 11 is protruded from the center of the front edge 3a of the top cover 3, and the support piece 1
1 is engaged with a ridge 12 projecting from the upper peripheral edge of the back surface of the tape cassette opening 5.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a housing for an electrical device that houses a device body such as a deck unit for a magnetic tape device.

[0002]

[Prior art]

 FIG. 11 shows an example of a magnetic tape device housing. That is, the front panel 2 is fitted into the front opening of the bottom case 1 in which the deck body (not shown) for the magnetic tape device is built, and the top cover 3 is fitted into the upper opening of the bottom case 1. They are fitted. Reference numeral 4 denotes an opening / closing door arranged in the tape cassette opening 5 formed in the front panel 2.

Conventionally, a technique for fitting the top cover 3 to the front panel 2 is described in Japanese Patent Application Laid-Open No. 9-260857. As shown in FIG. 12, the top cover 3 is formed of sheet metal, and the tongue 7 is provided to project forward from the center of the front edge 3a of the top cover 3, and the front edge 3a A pair of left and right projections 8a is formed by bending both ends downward to form a concave portion 8, and a pair of left and right ears 9 project rearward from both ends of the top plate 2a of the front panel 2. At the same time, a through hole 9a is formed in each ear 9 so that the tongue 7 is engaged with the lower surface of the top plate 2a and each projection 8a is connected to each other as shown by a virtual line in FIG. The top cover 3 is fitted to the front panel 2 by being fitted into the through hole 9 a of the ear 9.

[0004]

[Problems to be solved by the invention]

 In the above-described conventional configuration, it is possible to prevent a gap from being generated at the butt portion between the front panel 2 and the top cover 3. However, when a load P is applied by placing an article on the top cover 3 or the like. When the central portion of the top cover 3 sinks, a step α may be generated between the top cover 3 and the front panel 2 (see the phantom line in FIG. 11), and the appearance is poor. Further, two concave portions 8 are exposed on the upper surface of the top cover 3, which also has a poor external appearance.

The present invention has been made in view of the above-described conventional drawbacks, and has as its object to provide a housing for an electric device having a good appearance in appearance by preventing sinking of a top cover.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 is to fit a front panel having an opening for a tape cassette into a front opening of a bottom case in which a deck body for a magnetic tape device is built, A housing for an electric device in which a top cover is fitted into an upper opening of the bottom case, wherein a front part of the top cover is opposed to a ridge protruding from an upper peripheral edge of a back surface of the tape cassette opening. A support piece protrudes from the center of the edge, and the upper surface of the base end of the support piece is in contact with the lower surface of the top plate of the front panel, and the center of the support piece is formed in a downwardly arcuate shape toward the front. The support piece is curved, and the lower surface of the tip of the support piece is formed in a substantially horizontal flat shape so as to abut on the upper surface of the ridge, and the tip face of the support piece is obliquely upward and forward. When tilted A rear surface of the ridge portion facing the front end surface of the support piece is inclined obliquely downward toward the rear, and a top plate portion of the front panel and ribs protruding from both ends of the rear surface of the front panel; A pair of left and right wedge pieces to be fitted between the wedge piece main bodies are formed at both ends of the front edge of the top cover over a predetermined width, and protrude from a tip of the wedge piece main body at predetermined intervals along the width direction. And each of the ribs is engaged with an upper end of a standing piece integrally formed with the bottom case.

[0007] According to the above configuration, the support piece projecting from the center of the front edge of the top cover is engaged with the ridge projecting from the upper peripheral edge of the back surface of the tape cassette opening formed in the front panel. Therefore, even if a load is applied to the top cover, for example, by placing an article on the top cover, the center of the top cover can be prevented from sinking against the load, and the appearance Is good. In addition, since the upper surface of the base end of the support piece is in contact with the lower surface of the top panel of the front panel, the top cover is prevented from floating and the front edge of the top cover is flush with the top panel of the front panel. It can be in the shape. Further, since the central portion of the support piece is formed in a downwardly arcuate shape toward the front, the arc-shaped outer peripheral surface of the central portion is brought into contact with the top plate portion of the front panel, so that the support piece is moved to the top plate. It can be smoothly inserted into the front panel along the part. Furthermore, by contacting the lower surface of the flat tip portion of the support piece with the upper surface of the ridge, the support piece can be prevented from accidentally coming off the ridge. Moreover, since the distal end surface of the support piece and the rear surface of the ridge portion facing the same are inclined so as to be substantially parallel to each other, the distal end surface of the support piece is pushed up along the rear surface of the ridge portion to support the support portion. The tip of the piece can be reliably engaged with the ridge.

Then, a pair of right and left wedge pieces protruding from both ends of the front edge of the top cover are simply fitted between the top plate of the front panel and the ribs protruding from both ends of the rear surface of the front panel. In this case, both ends of the front edge of the top cover can be integrally connected to the front panel. In particular, the plurality of protrusions of the wedge piece are fitted between the top plate of the front panel and the rib. By doing so, the wide wedge body can be smoothly fitted between the top plate and the ribs, and the long projections can be fitted deeply between the top plate and the ribs. Thus, both ends of the front edge of the top cover can be securely connected to the front panel. In addition, since each rib is supported by the standing piece of the bottom case, and when the wedge piece is fitted between each rib and the top plate portion, each rib cannot be pushed down by the pushing force due to the fitting. By securely inserting the wedge piece between each rib and the top panel, both ends of the front edge of the top cover can be firmly connected to the front panel.

According to a second aspect of the present invention, in the first aspect of the present invention, a positioning portion of the opening / closing door disposed in the tape cassette opening is provided substantially at the upper center of the opening / closing door, and the support piece is provided. A pair of left and right parts is provided at a center of the front edge of the top cover at a predetermined interval, and the positioning part is arranged in a gap between the two support pieces.

[0010] According to the above configuration, when the positioning portion of the opening / closing door disposed in the tape cassette opening is provided substantially at the upper end of the center of the opening / closing door, the two support pieces are projected to avoid the positioning portion. Part can be engaged.

According to a third aspect of the present invention, in the first aspect of the present invention, a positioning portion of the opening / closing door disposed in the tape cassette opening is provided at a position shifted laterally from a center of the opening / closing door. One of the support pieces is provided at the center of the front edge of the top cover so as to avoid the positioning portion.

According to the above configuration, when the positioning portion of the opening / closing door arranged in the tape cassette opening is provided at a position shifted laterally from the center of the opening / closing door, the positioning portion is avoided. The support piece can be engaged with the ridge.

According to a fourth aspect of the present invention, there is provided a device for electric equipment in which a front panel is fitted into a front opening of a bottom case in which a device main body is built, and a top cover is fitted into an upper opening of the bottom case. The housing is characterized in that a support piece is provided at the center of the front edge of the top cover, the support piece engaging with a ridge projecting from the back surface of the front panel.

According to the above configuration, since the center of the front edge of the top cover is supported by the support piece, even if a load is applied to the top cover by placing an article on the top cover or the like, the load is applied to the load. The center part of the top cover can be prevented from sinking, and the appearance is good.

The invention according to claim 5 is characterized in that, in the invention according to claim 4, an upper surface of a base end portion of the support piece is in contact with a lower surface of a top plate portion of the front panel.

According to the above configuration, since the upper surface of the base end portion of the support piece is in contact with the lower surface of the top plate portion of the front panel, the top cover is prevented from floating and the front edge of the top cover is fixed to the front panel. Can be flush with the top plate.

According to a sixth aspect of the present invention, in the invention of the fourth or fifth aspect, a center portion of the support piece is curved forward and downward in an arc shape.

According to the above configuration, since the center of the support piece is formed in a downwardly arcuate shape toward the front, the arcuate outer peripheral surface of the center is brought into contact with the top plate of the front panel. The support piece can be smoothly inserted into the front panel along the top plate.

According to a seventh aspect of the present invention, in the device according to any one of the fourth to sixth aspects, the lower surface of the front end of the support piece is formed in a substantially horizontal flat shape. A lower surface is brought into contact with an upper surface of the ridge portion.

According to the above configuration, the lower end of the flat tip portion of the support piece is brought into contact with the upper surface of the ridge portion of the front panel so that the support piece is not accidentally detached from the ridge portion. Can be.

The invention according to claim 8 is characterized in that, in the invention according to any one of claims 4 to 7, the distal end surface of the support piece is inclined obliquely upward toward the front. .

According to the above configuration, when the front end surface inclined obliquely upward toward the front of the support piece is brought into contact with the ridge of the front panel, the front end surface of the support piece is pushed up. The tip of the support piece can be reliably engaged with the ridge.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, a rear surface of the ridge portion facing the front end surface of the support piece is inclined obliquely downward toward the rear. .

According to the above configuration, the front end surface of the support piece and the rear surface of the protruding ridge facing the support piece are inclined so as to be substantially parallel to each other. By pushing the support piece upward, the tip of the support piece can be more reliably engaged with the ridge.

According to a tenth aspect of the present invention, in the device according to any one of the fourth to ninth aspects, a top plate portion of the front panel and both end portions of a rear surface of the front panel are provided at both ends of a front edge of the top cover. A pair of left and right wedge pieces are provided so as to be fitted between the ribs and the ribs protruding therefrom.

According to the above configuration, a pair of left and right wedge pieces protruding from both ends of the front edge of the top cover are fitted between the top plate of the front panel and the ribs protruding from both ends of the rear surface of the front panel. Simply by doing so, both ends of the front edge of the top cover can be integrally connected to the front panel.

In the invention according to claim 11, in the invention according to claim 10, the wedge piece has a wedge piece body formed over a predetermined width at both ends of the front edge of the top cover, and a wedge piece body at the front end of the wedge piece body. And a plurality of protrusions protruding forward at predetermined intervals along the width direction and protruding forward.

According to the above configuration, the plurality of projections of the wedge piece are fitted between the top plate of the front panel and the rib, so that the wide wedge body is also smoothly placed between the top plate and the rib. The front end of the top cover can be reliably connected to the front panel by fitting the long projections deeply between the top plate and the ribs.

According to a twelfth aspect of the present invention, in the device according to the tenth or eleventh aspect, each of the ribs is engaged with an upper end of an upright piece integrally formed with the bottom case.

According to the above configuration, each rib is supported by the upright piece of the bottom case, and when the wedge piece is fitted between each rib and the top plate portion, each wedge piece is pressed down by the fitting. Since the ribs cannot be pushed down, the wedge pieces can be securely bitten between the ribs and the top plate, and both ends of the front edge of the top cover can be firmly connected to the front panel.

According to a thirteenth aspect of the present invention, in the device according to any one of the fourth to twelfth aspects, the device main body comprises a magnetic tape device deck main body, and the tape cassette opening formed in the front panel is provided. The front end of the support piece is engaged with a ridge projecting from the upper peripheral edge of the back surface.

According to the above configuration, the support piece projecting from the center of the front edge of the top cover is engaged with the ridge projecting from the upper surface of the back surface of the tape cassette opening formed in the front panel. Therefore, it is possible to form a magnetic tape device housing having a good appearance in appearance in which the top panel of the front panel and the top cover are flush with each other.

[0033]

[Embodiment of the invention]

 1 to 4 show a housing for a magnetic tape device according to an embodiment of the present invention, in which an opening / closing door 4 disposed in a tape cassette opening 5 is opened and closed by a pair of left and right hinge portions 4a. A positioning portion 4b, which is supported so as to be able to position the opening / closing door 4 so as not to move in the lateral direction, is provided substantially at the upper center of the opening / closing door 4, and the top cover 3 is formed of synthetic resin. By providing a pair of left and right support pieces 11 at a predetermined interval in the center of the front edge 3a of the top cover 3, a positioning portion 4b is disposed in a gap between the two support pieces 11, and each of the support pieces 11 is taped. A pair of left and right wedge pieces 13 project from both ends of a front edge 3a of the top cover 3 so as to be engaged with a ridge 12 projecting from an upper peripheral edge of the back surface of the cassette opening 5. To the top panel 2a of the front panel 2. The front panel 2 is fitted between ribs 14a on a plurality of protrusions 14 protruding from both ends of the rear surface of the front panel 2. Each protrusion 14 engages with the upper end of a rising piece 16 rising from the bottom plate of the bottom case 1. Have been. Reference numeral 17 denotes a screw for fixing the top cover 3 to the bottom case 1.

According to the above configuration, since the support pieces 11 of the top cover 3 are engaged with the ridges 12 of the front panel 2, a load P is applied by placing an article on the top cover 3. Even in this case, the central portion of the top cover 3 can be prevented from sinking against the load P, and the appearance is good. Further, by merely fitting the pair of left and right wedge pieces 13 of the top cover 3 between the top plate 2a of the front panel 2 and the ribs 14a, both ends of the front edge of the top cover 3 are integrated with the front panel 2. Can be connected. Further, the two supporting pieces 11 can be engaged with the ridges 12 while avoiding the positioning portion 4b of the opening / closing door 4 arranged in the tape cassette opening 5. Moreover, the ribs 14a are supported by the upstanding pieces 16 of the bottom case 1, and when the wedge pieces 13 are fitted between the respective ribs 14a and the top plate 2a, each of the ribs 14a is pressed down by the fitting force. Since the ribs 14a are not pushed down, the wedge pieces 13 are securely inserted between the respective ribs 14a and the top plate 2a, and both ends of the front edge 3a of the top cover 3 are firmly connected to the front panel 2. be able to.

Each of the support pieces 11 includes a base end 11a, a center 11b, and a tip 11c, as shown in FIGS. 5 and 6, and as shown in FIG. 5, an upper surface 19 of the base 11a. Is brought into contact with the lower surface of the top panel 2a of the front panel 2, thereby preventing the top cover 3 from floating and bringing the front edge 3a of the top cover 3 into contact with the top panel 2a of the front panel 2. Can be in one state.

As shown in FIG. 6, a central portion 11 b of each support piece 11 is curved downward and forward in an arc shape, and the arc-shaped outer peripheral surface 20 of the central portion 11 b is attached to the top plate portion of the front panel 2. By contacting the support piece 2a, the support piece 11 can be smoothly inserted into the front panel 2 along the top plate 2a.

As shown in FIG. 5, the lower surface 21 of the tip portion 11 c of each support piece 11 is formed in a substantially horizontal flat shape, and the lower surface 21 is brought into contact with the upper surface 12 a of the ridge portion 12. In addition, it is possible to prevent the support piece 11 from accidentally coming off the ridge portion 12.

As shown in FIG. 6, the front end face 22 of the support piece 11 is inclined obliquely upward toward the front, and the rear face 23 of the ridge 12 facing the front end face 22 of the support piece 11 is formed. The support piece 11 is inclined obliquely downward toward the rear, so that the front end face 22 of the support piece 11 and the rear face 23 of the ridge 12 opposed thereto are inclined so as to be substantially parallel to each other. The distal end surface 22 of the support piece 11 is pushed up along the rear surface 23 of the ridge portion 12 so that the distal end portion 11c of the support piece 11 can be more securely engaged with the ridge portion 12.

As shown in FIGS. 7 and 8, each of the wedge pieces 13 includes a wedge piece main body 13a formed at both ends of a front edge portion 3a of the top cover 3 over a predetermined width D. A plurality of protrusions 13b projecting at predetermined intervals along the width direction at the front end and projecting forward by a predetermined distance h are provided, and each projection 13b is provided with a top plate 2a of the front panel 2 and a rib. 14a, the wedge piece main body 13a having a wide width D can be smoothly fitted between the top plate 2a and the ribs 14a. By fitting deeply between the ribs 2a and the ribs 14a, both ends of the front edge 3a of the top cover 3 can be securely connected to the front panel 2 (see phantom lines in FIG. 8).

FIGS. 9 and 10 show a magnetic tape device housing according to another embodiment of the present invention, in which the positioning portion 4b of the opening / closing door 4 is moved from the center of the opening / closing door 4 to the side. One support piece 11 is provided at the center of the front edge 3a of the top cover 3 so as to avoid the positioning portion 4b. Since the configuration other than the above is substantially the same as that of the embodiment shown in FIGS. 1 to 8, the same portions are denoted by the same reference numerals and description thereof will be omitted.

According to the above configuration, when the position determining portion 4 b of the opening / closing door 4 disposed in the tape cassette opening 5 is provided at a position shifted laterally from the center of the opening / closing door 4, The support piece 11 can be engaged with the ridge portion 12 while avoiding the positioning portion 4b.

In both of the above embodiments, the magnetic tape device has been described as an example. However, the present invention is not limited to this, and can be applied to, for example, housings of various electric devices such as a DVD.

[0043]

[Effect of the invention]

 According to the first aspect of the present invention, a support piece protruding from the center of the front edge of the top cover is engaged with a ridge protruding from the upper edge of the rear surface of the tape cassette opening formed on the front panel. Even when a load is applied to the top cover, such as when an article is placed on the top cover, the center portion of the top cover can be prevented from sinking against the load, and the The appearance is good. Also, since the upper surface of the base end portion of the support piece is in contact with the lower surface of the top panel of the front panel, the top cover is prevented from floating and the front edge of the top cover is in contact with the top panel of the front panel. They can be flush. Further, since the central portion of the support piece is formed in a downwardly arcuate shape toward the front, the arcuate outer peripheral surface of the central portion is brought into contact with the top plate portion of the front panel, thereby allowing the support piece to be lifted up. It can be smoothly inserted into the front panel along the plate. Furthermore, by contacting the lower surface of the flat tip of the support piece with the upper surface of the ridge, the support piece can be prevented from accidentally coming off the ridge. In addition, since the tip surface of the support piece and the rear face of the ridge facing the support piece are inclined so as to be substantially parallel to each other, the tip face of the support piece is pushed up along the rear face of the ridge and the support piece is raised. Can be reliably engaged with the ridges.

Then, a pair of left and right wedge pieces protruding from both ends of the front edge of the top cover are simply fitted between the top plate of the front panel and the ribs protruding from both ends of the rear surface of the front panel. In this case, both ends of the front edge of the top cover can be integrally connected to the front panel. In particular, the plurality of protrusions of the wedge piece are fitted between the top plate of the front panel and the rib. By doing so, the wide wedge body can be smoothly fitted between the top plate and the ribs, and the long projections can be fitted deeply between the top plate and the ribs. Thus, both ends of the front edge of the top cover can be securely connected to the front panel. In addition, since each rib is supported by the standing piece of the bottom case, and when the wedge piece is fitted between each rib and the top plate portion, each rib cannot be pushed down by the pushing force due to the fitting. By securely inserting the wedge piece between each rib and the top panel, both ends of the front edge of the top cover can be firmly connected to the front panel.

According to the invention of claim 2, when the positioning portion of the opening / closing door disposed in the opening for the tape cassette is provided substantially at the upper end of the center of the opening / closing door, the positioning portion is avoided. Both support pieces can be engaged with the ridge.

According to the invention, when the positioning portion of the opening / closing door disposed in the tape cassette opening is provided at a position shifted laterally from the center of the opening / closing door, the positioning portion is provided. And the support piece can be engaged with the ridge.

According to the invention of claim 4, since the center of the front edge of the top cover is supported by the support piece, even if an article is placed on the top cover and a load is applied to the top cover, the load is reduced. The center part of the top cover can be prevented from sinking against the load, and the appearance is good.

According to the invention of claim 5, the upper surface of the base end portion of the support piece is in contact with the lower surface of the top plate portion of the front panel. The edge can be flush with the top panel of the front panel.

According to the invention of claim 6, since the central portion of the support piece is formed in a downwardly arcuate shape toward the front, the arc-shaped outer peripheral surface of the central portion corresponds to the top plate portion of the front panel. By making contact, the support piece can be smoothly inserted into the front panel along the top plate.

According to the present invention, the lower end of the flat end portion of the support piece is brought into contact with the upper surface of the ridge portion of the front panel so that the support piece does not accidentally come off the ridge portion. Can be done.

According to the invention described in claim 8, when the front end surface inclined obliquely upward toward the front of the support piece is brought into contact with the ridge portion of the front panel, the front end face of the support piece is pushed up. As a result, the tip of the support piece can be securely engaged with the ridge.

According to the ninth aspect of the present invention, since the front end surface of the support piece and the rear surface of the ridge facing the support piece are inclined so as to be substantially parallel to each other, the front end surface of the support piece is formed by the ridge. By pushing up along the rear surface, the tip of the support piece can be more securely engaged with the ridge.

According to the tenth aspect of the present invention, a pair of right and left wedge pieces projecting from both ends of the front edge of the top cover project from the top plate of the front panel and both ends of the rear face of the front panel. By simply fitting the front cover, the both ends of the front edge of the top cover can be integrally connected to the front panel.

According to the eleventh aspect of the present invention, the plurality of projections of the wedge piece are fitted between the top plate and the rib of the front panel, so that the wide wedge main body is also fitted with the top plate and the rib. The front end of the top cover is securely connected to the front panel by fitting each long projection deep between the top plate and the ribs. be able to.

According to the invention of claim 12, each rib is supported by the standing piece of the bottom case, and when a wedge piece is fitted between each rib and the top plate, the fitting is performed. Since the ribs cannot be pushed down by the pushing force of, the wedge pieces are securely bitten between each rib and the top plate, and both ends of the front edge of the top cover are firmly connected to the front panel. it can.

According to the invention of claim 13, a support piece projecting from the center of the front edge of the top cover with respect to the ridge projecting from the upper peripheral edge of the back surface of the tape cassette opening formed in the front panel. As a result, it is possible to form a magnetic tape device housing having a good appearance in appearance in which the top panel of the front panel and the top cover are flush with each other.

[Brief description of the drawings]

FIG. 1 is a front view showing a housing for a magnetic tape device according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is an exploded perspective view of the same.

FIG. 5 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 6 is a longitudinal sectional view of a main part showing a state where the support piece is inserted.

FIG. 7 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 8 is a plan view of a main part showing a fitted state of the wedge piece.

FIG. 9 is a front view showing a magnetic tape device housing according to another embodiment of the present invention.

FIG. 10 is an exploded perspective view of the same.

FIG. 11 is a perspective view of a housing for a magnetic tape device.

FIG. 12 is an exploded perspective view of a main part showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 bottom case 2 front panel 2a front panel top plate 3 top cover 3a front edge of top cover 4 opening / closing door 4b opening / closing door positioning portion 5 tape cassette opening 11 support piece 11a base end of support piece 11b support Center of piece 11c Tip of support piece 12 Protrusion 12a Upper surface of protrusion 13 Wedge piece 13a Wedge piece main body 13b Projection 14a Rib 16 Standing piece 19 Upper face of base end of support piece 20 Center of support piece Arc-shaped outer peripheral surface 21 lower surface of tip of support piece 22 distal face of support piece 23 rear face of ridge

Claims (13)

[Utility model registration claims] 1. A front panel having an opening for a tape cassette is fitted into a front opening of a bottom case in which a deck body for a magnetic tape device is incorporated, and a top cover is fitted to an opening on the upper surface of the bottom case. A housing for the fitted electric device, wherein a support piece is provided at the center of the front edge of the top cover so as to face a ridge provided at an upper peripheral edge of a back surface of the tape cassette opening, An upper surface of a base end portion of the support piece is in contact with a lower surface of a top plate portion of the front panel, and a center portion of the support piece is curved forward and downward in a circular arc shape, and a tip portion of the support piece is formed. The lower surface is formed in a substantially horizontal flat shape so as to abut against the upper surface of the ridge portion, and the tip surface of the support piece is inclined obliquely upward toward the front, and the tip of the support piece is formed. The ridge facing the surface A pair of left and right wedge pieces that are fitted between a top plate of the front panel and ribs protruding from both ends of the back surface of the front panel are inclined with the rear surface of the rear cover being inclined obliquely downward toward the rear. A wedge piece main body formed over a predetermined width at both ends of a front edge of the main body, and a plurality of protrusions protruding forward at predetermined intervals along the width direction at the tip of the wedge piece main body, and protruding forward. A housing for an electric device, wherein a rib is engaged with an upper end of a standing piece integrally formed with the bottom case. 2. An opening / closing door positioning portion disposed in the tape cassette opening is provided substantially at the upper end of the center of the opening / closing door. 2. The electric device casing according to claim 1, wherein the positioning portion is provided, and the positioning portion is disposed in a gap between the two support pieces. 3. An opening / closing door positioning part disposed in the tape cassette opening is provided at a position shifted laterally from the center of the opening / closing door, and the support piece is located in front of the top cover so as to avoid the positioning part. The housing for electric equipment according to claim 1, wherein one is provided at the center of the edge. 4. An electric device housing in which a front panel is fitted into a front opening of a bottom case in which a device main body is incorporated, and a top cover is fitted into an upper opening of the bottom case. A housing for electrical equipment, wherein a support piece is provided at the center of the front edge of the top cover to engage with a ridge projecting from the back surface of the front panel. 5. The housing for an electric device according to claim 4, wherein an upper surface of a base end portion of the support piece is in contact with a lower surface of a top plate portion of the front panel. 6. A center portion of the support piece is curved downward in a forward arc.
Or the housing | casing for electrical apparatuses of 5. 7. The lower end of the support piece is formed in a substantially horizontal flat shape, and the lower surface of the flat tip is brought into contact with the upper surface of the ridge. Item 7. An electric device housing according to any one of Items 4 to 6. 8. The electrical equipment casing according to claim 4, wherein a tip end surface of the support piece is inclined obliquely upward toward the front. 9. The housing for an electric device according to claim 8, wherein a rear surface of the ridge portion facing the front end surface of the support piece is inclined obliquely downward toward the rear. 10. A pair of left and right wedge pieces that are fitted between a top plate of the front panel and ribs protruding from both ends of a rear surface of the front panel are provided at both ends of a front edge of the top cover. The electrical device casing according to any one of claims 4 to 9, wherein: 11. A wedge piece main body formed over a predetermined width at both ends of a front edge portion of a top cover, and a wedge piece protruding from a tip end of the wedge piece body at predetermined intervals along a width direction to be forward. The housing for an electric device according to claim 10, further comprising a plurality of protruding portions that protrude. 12. The electric device casing according to claim 10, wherein each of the ribs is engaged with an upper end of an upright piece integrally formed with the bottom case. 13. The device main body comprises a magnetic tape device deck main body, and a tip end of the support piece is engaged with a ridge protruding from an upper peripheral edge of a back surface of a tape cassette opening formed in the front panel. The housing for an electric device according to any one of claims 4 to 12, wherein: