JP3916078B2 - Front panel of electrical equipment housing - Google Patents

Description

  The present invention relates to a front panel of a housing of an electric device such as a DVD.

  In car audio equipment such as CD players and MD players, when a specific product is manufactured from various players, design development costs and mold costs can be reduced by sharing the main board and main chassis for all products. Is known (see, for example, Patent Document 1). In addition, in a magnetic recording / reproducing apparatus, a technique is disclosed in which a chassis on which components are disposed is configured by a metal chassis and a resin chassis (see, for example, Patent Document 2).

  As another conventional example, there is one in which a DVD housing is constituted by a sheet metal chassis, a sheet metal top case, and a front panel. In this casing, the box-shaped sheet metal chassis having a low profile and the front panel are coupled to the lower three places and the left and right places.

  On the other hand, there is a demand to reduce the cost by changing the sheet metal chassis to a resin chassis, and at that time, if the front panel combined with the sheet metal chassis can also be shared with the resin chassis, This is extremely advantageous in terms of cost compared to combining a dedicated front panel with a resin chassis.

Japanese Unexamined Patent Publication No. 2000-3384 JP-A-8-45259

  However, it is difficult to secure the required strength to make the structure of the resin chassis exactly the same as the structure of the sheet metal chassis. In other words, the sheet metal chassis and the resin chassis need to be appropriately designed so that the sheet thickness and structure correspond to the material. Therefore, in order to cope with the requirement to share the front panel with both, it is necessary to make the structure of the front panel be able to absorb the wall thickness difference between the sheet metal chassis and the resin chassis, It is necessary to devise the structure of the mounting part for the chassis.

  The present invention has been made under the above circumstances. By making it possible to use a front panel originally used in combination with a sheet metal chassis in combination with a resin chassis, it is made of sheet metal. An object of the present invention is to provide a front panel of an electrical equipment casing that can be shared by both a chassis and a resin chassis.

  It is another object of the present invention to provide a front panel of an electrical equipment housing that is excellent in mounting workability with respect to a resin chassis that is easily bent and deformed by a load caused by human power applied during work.

The front panel of the electrical equipment casing according to the present invention is a synthetic resin molding that is disposed on the front surface of a box-shaped sheet metal chassis that has an upper surface covered with a sheet metal top case and that has an open front with a low profile. A resin-made front panel body, a lower engaging piece that engages with first lower protrusions provided at a plurality of lateral positions of a front end portion of the bottom plate of the sheet metal chassis, and left and right side plates of the sheet metal chassis. In the front panel of an electrical equipment housing provided with left and right side engaging pieces that are individually engaged with the first side protrusions of the front end, the resin front panel body is opened at the top by the resin top case. The lower engagement of the resin front panel body can be deployed on the front surface of a box-shaped resin chassis, which is covered with a resin molded body and has a low, horizontally long front surface that is open. Can be engaged with second lower protrusions integrally formed at a plurality of locations in the lateral direction of the front end portion of the bottom plate of the resin chassis, and the left and right side engagement pieces are respectively left and right in the resin chassis. The resin front panel body includes a substantially horizontally long front plate and a surrounding frame plate protruding rearward from the periphery of the front plate. In addition, a pressing piece that overlaps the upper side of the front-facing first insertion piece provided at the front end portion of the bottom plate of the sheet metal chassis protrudes from the front plate, and is displaced laterally from the protruding position of the pressing piece. A receiving rib for supporting the first insertion piece from the lower side is provided on the lower plate portion of the surrounding frame body, and the width of the vertical interval between the holding piece and the receiving rib is the thickness of the first insertion piece. Dimension suitable for thickness On the other hand, the thickness of the front-facing second insertion piece provided at the front end portion of the bottom plate of the resin chassis is larger than the thickness of the first insertion piece, and the presser piece and the lower plate portion And the receiving rib accommodates the second insertion piece when the second insertion piece is inserted between the holding piece and the lower plate portion. A relief recess is formed .

  With this configuration, when the front panel is used in combination with the sheet metal chassis, the lower engagement piece of the resin front panel main body is engaged with the first lower protrusion of the sheet metal chassis, and the resin front panel main body By engaging the left and right side portion engaging pieces with the left and right first side protrusions of the sheet metal chassis, the front panel and the sheet metal chassis are coupled to each other on the lower side and the left and right sides. On the other hand, when the front panel is used in combination with the resin chassis, the lower engagement piece of the resin front panel body is engaged with the second lower protrusion of the resin chassis, and the left and right sides of the resin front panel body are The side engaging pieces are accommodated in the left and right receiving spaces of the resin chassis and escaped, and the left and right upper protrusions of the resin front panel main body are separately engaged with the left and right upper engaging pieces of the resin chassis. Thus, the front panel and the resin chassis are joined at the left and right two locations on the lower side and the upper side. Therefore, this front panel can be used in combination with a sheet metal chassis as well as a sheet metal chassis, and thus can be used for both a sheet metal chassis and a resin chassis.

Further, according to the above configuration, even if the second insertion piece of the resin chassis is thicker than the first insertion piece of the sheet metal chassis and the necessary strength is ensured, the first insertion piece of the sheet metal chassis is the press piece. The second insertion piece of the resin chassis is held so as not to be bent by the presser piece and the lower plate portion. Therefore, the front panel can be attached firmly and without wobbling even when combined with either a sheet metal chassis or a resin chassis.

  In the present invention, the second insertion piece inserted between the presser piece and the lower plate portion is in contact with the presser piece overlapping the upper side of the second insertion piece and the upper surface of the relief recess. It is desirable that the rib be sandwiched in the vertical direction, and this improves the shape retention of the resin chassis that is easily bent and deformed with respect to the second insertion piece.

  The front panel of the electrical equipment casing according to the present invention is further embodied by adopting the following configuration. That is, the resin-made front panel body, which is a synthetic resin molded body that is disposed on the front surface of a box-shaped sheet metal chassis whose upper surface is covered by a sheet metal top case and whose front surface is low in width and wide, is opened A lower engaging piece that engages with a first lower protrusion provided at a plurality of lateral positions of a front end portion of the bottom plate of the sheet metal chassis, and a first side protrusion of each of the left and right side plate front ends of the sheet metal chassis. In the front panel of the electrical equipment housing provided with the left and right side engaging pieces to be engaged, the resin front panel body includes a substantially horizontally long front plate and an enclosure protruding rearward from the peripheral edge of the front plate. It can be deployed on the front of a box-shaped resin chassis that is covered with a resin top case and has an open upper surface covered by a resin top case, and a low, horizontally long front made of a resin molded body. The lower engagement piece of the resin front panel main body is engageable with second lower protrusions integrally formed at a plurality of lateral positions of the front end portion of the bottom plate in the resin chassis, and left and right The side engagement pieces can be accommodated in accommodation spaces defined and formed at the left and right side front end portions in the resin chassis, and the resin front panel body is integrally formed with the resin chassis. Left and right upper engaging pieces that are individually engaged with the upper protrusions provided at the tops of the left and right frame bodies forming the left and right receiving spaces, respectively, and the bottom plate front end of the sheet metal chassis A pressing piece that overlaps the upper side of the forward-facing first insertion piece provided on the front plate protrudes from the front plate, and the first insertion piece is lowered at a position that is laterally displaced from the protruding position of the holding piece. Receiving ribs to be supported from the bottom of the surrounding frame body, and the width of the vertical interval between the holding pieces and the receiving ribs is determined to be a size corresponding to the thickness of the first insertion piece. Each of the presser pieces and the receiving ribs are disposed at a plurality of positions in the lateral direction, and the thickness of the second insertion piece facing forward provided at the front end portion of the bottom plate of the resin chassis is the first insertion piece. And is determined to have a dimension that matches the width of the vertical gap between the presser piece and the lower plate portion, and the second insert piece is connected to the presser piece and the second insert piece. An escape recess is formed to accommodate the receiving rib when inserted between the lower plate portion, and the second insertion piece inserted between the presser piece and the lower plate portion has a first recess. 2 The above-mentioned presser piece and the above-mentioned relief recess that overlap the upper side of the insertion piece The upper ribs are squeezed in the vertical direction by the receiving ribs that contact the upper surface of the upper part of the frame, and the upper engaging pieces of the resin front panel main body are pushed in while sliding the top surface of the frame. More specifically, by adopting a configuration in which the resin front panel main body is provided with a load supporting piece that receives the side surface of the frame body and prevents the frame body from being displaced due to a work load when engaged with the protrusion. It becomes. The effect | action of this invention is demonstrated in detail with reference to embodiment mentioned later.

As described above, according to the present invention, the front panel originally used in combination with the sheet metal chassis is also changed to a resin chassis in which the plate thickness and structure are changed according to the resin as the material. Since they can be used in combination, it is possible to provide a front panel of an electrical equipment housing that can be shared by both a sheet metal chassis and a resin chassis .

  FIG. 1 is a schematic plan view of a front panel according to the present invention, FIG. 2 is a view taken along the line II in FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG.

  The front panel P shown in FIGS. 1 to 3 originally has a configuration that can be used in combination with a sheet metal chassis S1 on which DVD components described later are mounted. Such a configuration is a resin chassis S2 described later. It is modified so that it can be used in combination.

  This front panel P has a resin-made front panel body 1 made of a synthetic resin molded body including a substantially horizontally long front plate 11 and a surrounding frame plate 12 protruding rearward from the periphery of the front plate 11. The lower engaging pieces 2 protruding rearward at a plurality of lateral positions (three in the example) of the surrounding frame 12 are integrally formed, whereas they protrude rearward at the left and right ends of the front plate 11. The left and right side engagement pieces 3 are integrally formed. The engagement pieces 2 and 3 are reinforced by ribs and have rectangular engagement holes 21 and 31. Further, the connecting piece 13 is integrally formed at two central portions of the front plate 11 so as to protrude rearward, and the connecting piece 13 is also provided with an engagement hole portion 14. The lower engaging piece 2, the side engaging piece 3, and the connecting piece 13 described above are elements necessary for attaching the front panel P to the sheet metal chassis S1 on which a DVD loader (described later) is mounted. In the illustrated front panel P, an upper engaging piece 5 protruding rearward from each of the left and right end portions of the front plate 11 is provided as an element necessary for attachment to the resin chassis S2, and this upper portion is provided. The engagement piece 5 also has an engagement hole 51.

  Further, in the front panel P, as a measure for enabling the sheet metal chassis S1 and the resin chassis S2 to be shared, the presser piece 61 protruding rearward from the front plate 11 and the lower part of the surrounding frame body 12 are used. The receiving rib 62 provided in the board part 12a is provided in the horizontal direction multiple places. The presser piece 61 and the receiving rib 62 are displaced in the lateral direction. Specifically, the pressing pieces 61 are provided at four positions in the horizontal direction, and receiving ribs 62 are provided at two positions that are displaced inward in the horizontal direction with respect to the two pressing pieces 61 at the center, and The width of the vertical interval between the presser piece 61 and the receiving rib 62 is determined to be a size that matches the thickness of the first insertion piece 76.

  11 is a schematic plan view of the sheet metal chassis S1, FIG. 12 is a schematic front view thereof, and FIG. 13 is an enlarged schematic cross-sectional view of a portion taken along line XIII-XIII of FIG.

  The chassis S1 made of sheet metal is formed in a box shape having a low profile and an open front and upper surface, and first lower protrusions 72 located at a plurality of lateral positions are cut downward at the front end of the bottom plate 71. The first insertion piece 76 is formed in a stepped shape so as to be raised and to face substantially the entire length in the lateral direction. Further, the front end portions of the left and right side plates 73 are respectively formed with protruding pieces 74 that are displaced inwardly, and the protruding pieces 74 are formed by cutting outwards and forming them. One side protrusion 75 is provided.

  11 to 13, R is a DVD loader, which is mounted in a state of being positioned at a substantially central portion in the horizontal direction of the bottom plate 71. A pair of left and right engaging claws 78 are provided on the upper portion of the machine casing 77 of the loader R. As shown by phantom lines in FIG. 12 or FIG. 13, the sheet metal chassis S <b> 1 is covered with an upper surface open portion by mounting the sheet metal top case T <b> 1 with screws.

  Next, a case where the front panel P is attached in combination with the sheet metal chassis S1 will be described with reference to FIGS. FIG. 14 is a longitudinal rear view showing a connecting portion between the front panel P and the sheet metal chassis S1, FIG. 15 is an enlarged vertical side view of a portion along the line XV-XV in FIG. 14, and FIG. 16 is an XVI-XVI in FIG. It is a cross-sectional top view of the part which follows a line.

  The front panel P is disposed on the front surface of a sheet metal chassis S1 whose upper surface opening portion is covered with a sheet metal top case T1. Then, at the joint portion between the front panel P and the sheet metal chassis S1, as shown in FIG. 14 or 15, the first insertion piece 76 of the sheet metal chassis S1 is connected to the presser piece 61 and the receiving rib of the resin front panel body 1. 62, the presser piece 61 overlaps the upper side of the first insertion piece 76, and the receiving rib 62 supports the first insertion piece 76 from the lower side. For this reason, the first insertion piece 76 is pinched by the plurality of holding pieces 61 and the plurality of receiving ribs 62 to prevent rattling.

  Further, the lower engaging pieces 2 of the resin front panel main body 1 overlap with the bottom plate 71 of the sheet metal chassis S1 as shown in FIG. 15, and the engaging holes 21 of the lower engaging pieces 2 are provided at a plurality of positions. The first lower protrusions 72 are individually engaged with each other. Furthermore, the left and right side engaging pieces 3 of the resin front panel main body 1 overlap each other outside the left and right protruding pieces 74 of the sheet metal chassis S1, as shown in FIG. The first side protrusions 75 of the left and right protruding pieces 74 are engaged with the engaging hole portions 31 of the part engaging pieces 3 separately.

  On the other hand, although not shown, the left and right connecting pieces 13 of the resin front panel main body 1 overlap the machine frame 77 of the loader R, and the engaging hole portions 14 engage with the left and right engaging claws 78 respectively. ing.

  A forward insertion piece 101 provided in the sheet metal top case T1 is inserted into a gap between the upper engagement piece 5 of the resin front panel main body 1 and the upper plate portion 12b of the surrounding frame plate 12, and the upper engagement piece 5 is inserted. The piece 5 is inserted and accommodated in the internal space of the sheet metal top case T1.

  In the electrical equipment casing composed of the sheet metal chassis S1, the sheet metal top case T1, and the front panel P coupled by the above-described configuration, the resin front panel main body 1 includes a lower engagement piece 2 and a first lower protrusion 72. Since it is coupled to the sheet metal chassis S1 at the lower three positions by the engagement, and is coupled to the sheet metal chassis S1 at the two left and right positions by the engagement of the side engagement pieces 3 and the first side protrusions 75, The shape retention of the front panel P itself is enhanced by the sheet metal chassis S1, and the situation where the shoulder portions (corner portions) located at the two left and right positions on the upper side of the resin front panel main body 1 do not occur does not occur.

  4 is a schematic plan view of the resin chassis S2, FIG. 5 is a schematic front view thereof, and FIG. 6 is an enlarged schematic cross-sectional view of a portion along line VI-VI in FIG.

  The resin chassis S2 is formed in a box shape with a low profile and an open front and upper surface. The front plate of the bottom plate 81 has a plurality of second lower projections 82 located at a plurality of positions in the horizontal direction. The second insertion piece 86 is formed in a stepped shape so as to be raised and forwardly extending over substantially the entire length in the lateral direction. In addition, frame bodies 84 and 85 are integrally formed between the front end portions of the left and right side plates 83 and the front end portion of the bottom plate 81, and the inside of the resin chassis S2 is formed by the respective frame bodies 84 and 85. The storage spaces 87 and 88 are formed at the front end portions of the left and right sides. In the example shown in the figure, the left frame 84 is formed in a horizontally long rectangle, whereas the right frame 85 is formed in a vertically long rectangle. Upper protrusions 91 and 92 are integrally formed on the tops of the respective frames 84 and 85.

  In this resin chassis S2, the thickness of the forward-facing second insertion piece 86 provided at the front end of the bottom plate 81 is the first insertion of the sheet metal chassis S1 described with reference to FIG. The thickness is determined to be thicker than the thickness of the piece 76, and the dimension is commensurate with the size of the vertical interval between the holding piece 61 of the resin front panel body 1 and the lower plate portion 12a of the surrounding frame body 12, for example, the vertical interval The dimensions are set to the same dimensions as the width. In addition, relief recesses 89 that can accommodate the receiving ribs 62 are formed at a plurality of positions in the lateral direction of the second insertion piece 86.

  As shown in FIG. 5 or 6, the resin chassis S <b> 2 is covered with the resin top case T <b> 2 by being screwed and mounted so that the open top surface of the resin chassis S <b> 2 is covered. A loader R similar to that described with reference to FIG. 11 and the like is mounted in a state of being positioned at a substantially central portion in the horizontal direction of the bottom plate 81.

  Next, with reference to FIG. 7 or FIG. 8, the case where the front panel P is mounted in combination with the resin chassis S2 will be described. FIG. 7 is a longitudinal rear view showing a connecting portion between the front panel P and the resin chassis S2, and FIG. 8 is an enlarged longitudinal side view of a portion along the line VIII-VIII in FIG.

  The front panel P is disposed on the front surface of the resin chassis S2 whose upper surface opening portion is covered with the resin top case T2. Then, at the joint between the front panel P and the resin chassis S2, as shown in FIG. 7 or FIG. 8, the second insertion piece 86 of the resin chassis S2 is connected to the presser piece 61 of the resin front panel body 1 and the surrounding frame. The presser piece 61 is inserted into the gap with the lower plate portion 12 a of the body 12, and the receiving piece 62 is accommodated in the escape recess 89 of the second insert piece 86. It is in contact with the upper surface of the relief recess 89. For this reason, the second insertion piece 86 inserted between the holding piece 61 and the lower plate portion 12a is vertically aligned by the holding piece 61 that overlaps the upper side and the receiving rib 62 that contacts the upper surface of the relief recess 89. As a result, rattling of the second insertion piece 86 is prevented.

  Further, the lower engaging pieces 2 of the resin front panel body 1 overlap the bottom plate 81 of the resin chassis S2 as shown in FIG. 8, and the engaging holes 21 of the lower engaging pieces 2 are provided at a plurality of positions. Are engaged with the second lower projections 82 respectively. Furthermore, the left and right side engaging pieces 3 of the resin front panel body 1 are accommodated in the accommodation spaces 87 and 88 (see FIGS. 7 and 8) which are defined at the left and right side front end portions in the resin chassis S2. Is accommodated in the accommodation space 87), whereas the left and right upper engaging pieces 5 of the resin front panel main body 1 are provided with left and right frame bodies 84 and 85 (the frame bodies in FIGS. 7 and 8). The engaging hole 51 is engaged with the upper protrusions 91 and 92 (the upper protrusion 91 does not appear in FIGS. 7 and 8) separately.

By the way, when the front panel P is formed of a resin molded body, when combined with the sheet metal chassis S1, if both are combined on the lower side and the left and right, the bending deformation resistance is improved compared to the resin chassis S2. Since the shape retention of the front panel P itself is enhanced by the excellent sheet metal chassis S1, the situation where the shoulder portions (corner portions) located at the two left and right positions on the upper side of the resin front panel body 1 do not wobble is not caused. When combined with the resin chassis S2 which is inferior in deformation resistance compared to the sheet metal chassis S1, the left and right shoulders of the resin front panel main body 1 can be connected to the resin chassis simply by combining the two on the lower side and the left and right sides. There is a risk that the left and right shoulders may sway back and forth because they are not joined.

Therefore, as described above, the lower engagement piece 2 of the resin front panel body 1 is engaged with the second lower protrusion 82 of the resin chassis S2, and the left and right upper engagement pieces 5 of the resin front panel body 1 are engaged. A structure is adopted in which the front panel P and the resin chassis S2 are coupled to each other at the lower left and upper left and right positions by separately engaging the left and right upper protrusions 91 and 92 of the resin chassis S2. The wobbling of the left and right shoulders of the resin front panel body 1 is prevented by the engagement between the upper protrusions 91 and 92 of the resin chassis S2 and the upper engagement piece 5 of the resin front panel body 1. The front panel can be joined to the resin chassis without shaking.

  On the other hand, although not shown, the left and right connecting pieces 13 of the resin front panel main body 1 overlap the machine frame 77 of the loader R, and the engaging hole portions 14 engage with the left and right engaging claws 78 respectively. ing.

  A forward insertion piece 201 provided in the resin top case T2 is inserted into a gap between the upper engagement piece 5 of the resin front panel body 1 and the upper plate portion 12b of the surrounding frame plate 12.

  In the electrical equipment casing composed of the resin chassis S2, the resin top case T2, and the front panel P coupled by the above configuration, the resin front panel body 1 includes the lower engagement piece 2 and the second lower protrusion 82. Since it is coupled to the resin chassis S1 at the lower three positions by the engagement, and is coupled to the resin chassis S2 at the two upper left and right positions by the engagement of the left and right upper engagement pieces 5 and the upper protrusions 91 and 92. The shape retention of the front panel P itself is enhanced by the resin chassis S2, and the situation where the shoulder portions (corner portions) located at the two left and right positions on the upper side of the resin front panel main body 1 do not wobble occurs.

  By the way, since the frame body 85 on one side of the resin chassis S2 is vertically long, the bottom plate 81 is easily bent and deformed by the work load in the vicinity of the installation location of the frame body 85. That is, in the process of attaching the front panel P to the resin chassis S2, the horizontally long resin front panel body 1 is held with the thumbs and index fingers of the left and right hands, and at the same time, the horizontally long resin chassis S2 is held between the middle fingers of the left and right hands. In some cases, the work of assembling the front panel P to the resin chassis S2 may be performed while holding the finger with the ring finger. When performing this work process, a load (work load) applied to the resin chassis S2 ) May cause the bottom plate 81 to be bent or warped. When such a situation occurs, the frame 85 of the resin chassis S2 tilts and the upper protrusion 92 is displaced, and the upper engagement piece 5 of the resin front panel body 1 is smoothly engaged with the upper protrusion 92. I can't do that.

  In order to solve such a problem in the work process, measures taken in this embodiment will be described with reference to FIG. 9 or FIG. FIG. 9A is an explanatory view showing the resin chassis S2 and the front panel P in which the above measures are taken, and FIG. 9B is a displacement of the upper protrusion 92 when a work load is applied to the resin chassis S2. FIG. 10 (A) is a cross-sectional plan view showing the main part of the front panel P in which the above measures are taken, FIG. 10 (B) is an explanatory view of the mounting process, and FIG. 10 (C) is a state after mounting. It is the partially cut rear view which showed the principal part.

  That is, as shown in FIG. 10A or FIG. 10B, a load supporting piece 93 is protruded rearward from the front plate portion 11 of the resin front panel body 1, and the resin chassis is formed by the load supporting piece 93. The side surface of the second frame body 85 is received to prevent the inclination of the frame body 95 and the displacement of the upper projection 92 due to the work load.

  If this configuration is adopted, the left and right hands are held in the state where the horizontally long resin chassis S2 is held between the middle and left fingers of the left and right hands as indicated by arrows a and a in FIG. When the left and right upper engaging pieces 5 of the resin front panel main body 1 held with the thumb or index finger are pushed in while sliding the top surfaces of the frame bodies 84 and 85, the frame body as shown in FIG. The load supporting piece 93 receives the side surface of 85. Therefore, the positional relationship between the load supporting piece 93 and the upper projection 92 at the top of the frame 85 is fixed, and the positional relationship between the load supporting piece 93 and the upper engaging piece 5 is also fixed. Even if the frame 85 and the upper projection 92 are displaced as shown in FIG. 9B, the upper engagement piece 5 is easily and reliably engaged with the upper projection 92 as shown in FIG. 10C. It becomes like this.

  In this embodiment, the load support piece 93 is provided only for the vertically long frame body 85 of the resin chassis S2, and the load support piece is omitted for the horizontally long frame body 84 of the resin chassis S2. is there. For the horizontally long frame 84 of the resin chassis S2, since the frame 84 is horizontally long, the bottom plate 81 in the vicinity of the installation location of the frame 84 is not bent and deformed. This is because the upper protrusion 91 is not displaced by the work load, and it is not necessary to provide a load support piece.

1 is a schematic plan view of a front panel according to the present invention. FIG. 2 is a view taken along line II in FIG. 3 is a view taken along the line III-III in FIG. It is a schematic plan view of a resin chassis. It is the same schematic front view. FIG. 6 is an enlarged schematic cross-sectional view of a portion along line VI-VI in FIG. 5. It is the vertical rear view which showed the joining location of a front panel and resin-made chassis. It is an expanded vertical side view of the part which follows the VIII-VIII line of FIG. (A) is explanatory drawing which showed resin-made chassis and a front panel, (B) is explanatory drawing which illustrated the displacement of the upper protrusion when the work load is applied to the resin-made chassis. (A) is the cross-sectional top view which showed the principal part of the front panel, (B) is attachment process explanatory drawing, (C) is the partially cutaway rear view which showed the principal part of the state after attachment. It is a schematic plan view of a sheet metal chassis. It is the same schematic front view. It is an expansion schematic sectional drawing of the part which follows the XIII-XIII line | wire of FIG. It is the vertical rear view which showed the joining location of a front panel and a sheet metal chassis. It is an expansion vertical side view of the part which follows the XV-XV line | wire of FIG. FIG. 16 is a cross-sectional plan view of a portion along line XVI-XVI in FIG. 15.

Explanation of symbols

P Front panel T1 Sheet metal top case T2 Resin top case S1 Sheet metal chassis S2 Resin chassis 1 Resin front panel body 2 Lower engagement piece 3 Side engagement piece 11 Front plate 12 Enclosure frame plate 12a Enclosure frame Lower plate portion 61 Presser piece 62 Receiving rib 71 Sheet metal chassis bottom plate 72 First lower protrusion 73 Sheet metal chassis side plate 75 First side protrusion 76 First insertion piece 81 Resin chassis bottom plate 82 Second lower protrusion 86 First 2 Insertion pieces 87,88 Housing space 84,85 Frame 89 Relief recess 91,92 Upper projection

Claims (3)

A sheet metal top case is covered with a resin-made front panel body made of a synthetic resin molded body that is disposed on the front surface of a box-shaped sheet metal chassis that has an open top surface covered by a top case made of sheet metal and a front surface that is low in profile and wide. A lower engaging piece that engages with a first lower protrusion provided at a plurality of lateral positions on the front end of the bottom plate of the chassis, and a first side protrusion at each of the left and right side plate front ends of the sheet metal chassis. In the front panel of the electrical equipment housing provided with left and right side engagement pieces
The resin front panel main body includes a substantially horizontally long front plate and a surrounding frame plate protruding rearward from the periphery of the front plate, and an upper surface open portion is covered by a resin top case, and the resin It can be deployed on the front side of a box-shaped resin chassis with a low-profile horizontally long front made of a molded body,
The lower engagement piece of the resin front panel main body is engageable with second lower protrusions integrally formed at a plurality of lateral positions of the front end portion of the bottom plate of the resin chassis, and the left and right side portions are provided. The engagement piece can be accommodated in an accommodation space defined and formed at the left and right side front end portions in the resin chassis,
The left and right upper members respectively engaged with the upper protrusions provided on the tops of the left and right frames that are integrally molded with the resin chassis and form the left and right housing spaces are formed on the resin front panel body. Add a piece,
A location where the presser piece overlapping the upper side of the forward-facing first insertion piece provided at the front end portion of the bottom plate of the sheet metal chassis protrudes from the front plate, and is displaced laterally from the projected location of the presser piece A receiving rib for supporting the first insertion piece from the lower side is provided on the lower plate portion of the surrounding frame body, and the width of the vertical interval between the holding piece and the receiving rib is the thickness of the first insertion piece. On the other hand, each of the presser pieces and the receiving ribs are arranged at a plurality of positions in the lateral direction.
The thickness of the forward-facing second insertion piece provided at the front end portion of the bottom plate of the resin chassis is larger than the thickness of the first insertion piece, and the width of the vertical interval between the presser piece and the lower plate portion is large. The second insertion piece has a relief recess that accommodates the receiving rib when the second insertion piece is inserted between the pressing piece and the lower plate portion. And the second insertion piece inserted between the presser piece and the lower plate portion is in contact with the presser piece overlapping the upper side of the second insertion piece and the upper surface of the escape recess. It is designed to be squeezed vertically by ribs,
When the upper engagement piece of the resin front panel main body is engaged with the upper protrusion by pushing in while sliding the top surface of the frame body, the side surface of the frame body is received to A front panel of an electric equipment housing, wherein a load supporting piece for preventing displacement is provided in the resin front panel main body. A sheet metal top case is covered with a resin-made front panel body made of a synthetic resin molded body that is disposed on the front surface of a box-shaped sheet metal chassis that has an open top surface covered by a top case made of sheet metal and a front surface that is low in profile and wide. A lower engaging piece that engages with a first lower protrusion provided at a plurality of lateral positions on the front end portion of the bottom plate of the chassis, and a first side protrusion at each of the left and right side plate front ends of the sheet metal chassis. In the front panel of the electrical equipment housing provided with left and right side engagement pieces
The resin front panel body can be deployed on the front surface of a box-shaped resin chassis in which the top open portion is covered by a resin top case, and the front side of the low profile horizontally formed of a resin molded body is open,
The lower engagement piece of the resin front panel main body is engageable with second lower protrusions integrally formed at a plurality of lateral positions of the front end portion of the bottom plate of the resin chassis, and the left and right side portions are provided. The engagement piece can be accommodated in an accommodation space that is partitioned at the left and right side front end portions in the resin chassis ,
The resin front panel main body includes a substantially horizontally long front plate and a surrounding frame plate protruding rearward from the peripheral edge of the front plate, and a first front-facing first provided at the front end of the bottom plate of the sheet metal chassis. A receiving rib for supporting the first insertion piece from the lower side is provided at the location where the holding piece overlapping the upper side of the insertion piece protrudes from the front plate and is laterally displaced from the protruding location of the holding piece. While provided in the lower plate part of the frame body, the width of the vertical interval between the presser piece and the receiving rib is determined to be a dimension commensurate with the thickness dimension of the first insertion piece,
The thickness of the forward-facing second insertion piece provided at the front end portion of the bottom plate of the resin chassis is larger than the thickness of the first insertion piece, and the width of the vertical gap between the presser piece and the lower plate portion is large. The second insertion piece is formed with a relief recess that accommodates the receiving rib when the second insertion piece is inserted between the pressing piece and the lower plate portion. The front panel of the electrical equipment housing | casing characterized by the above-mentioned . The second insertion piece inserted between the presser piece and the lower plate portion is perpendicular to the presser piece overlapping the upper side of the second insertion piece and the receiving rib contacting the upper surface of the escape recess. The front panel of the electrical equipment housing according to claim 2 , wherein the front panel is squeezed in a direction.

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