Abstract:
In an air conditioner with a front panel projected forward, in order to increase stiffness of a body cabinet and to improve maintainability and appearance, the body cabinet is composed of: a base panel; a top panel; and a front panel, and the front panel is formed only with an air outlet port to be finished into a refined appearance having less seams, and it is adopted as basic configuration to support a front end side of the top panel by a drain pan, and further a front end side of the front panel and the front end side of the top panel are coupled to each other.

Description:
TECHNICAL FIELD 
     The present invention relates to a separation type air conditioner, and more particularly to an air conditioner having a body cabinet similar to a ceiling suspension type pattern while being a wall-mounted type. 
     BACKGROUND ART 
     Currently, a dominating air conditioner (indoor unit) is the wall-mounted type, and air conditioners designed in various ways have been supplied to a market. From among those, a consumer selects, and on purchasing, be a design as it may, emphasis may be placed on an installation place in terms of relationship with a housing space (arrangement of rooms). 
     For example, when installing at a window, a wall surface over the window is sometimes narrow in height and width because a curtain rail or the like are fitted, and therefore, an air conditioner having a pattern which does not require as much wall surface space as possible is desired. 
     Japanese Patent Application published under Publication No. 5-99454 discloses an example of air conditioners capable of complying with such desire. FIG. 24 is a perspective view showing the wall surface fitting state, and FIG. 25 is a sectional view illustrating an internal structure. 
     A body cabinet  1  of this air conditioner is composed of: a top panel  2  opposite to a ceiling surface; a bottom panel  3  opposite to a floor surface; a front panel  4 ; and a base panel  5  to be fitted to the wall surface, and has a heat exchanger  6 , a blow fan  7  or the like therein. The front panel  4  is provided with an air inlet port  4   a,  and behind the bottom panel  3 , there is provided an air outlet port  3   a  having a louver  8 . 
     Referring to FIG. 25, this body cabinet  1  is such that a height on the front panel  4  side is formed to be smaller than a height H2 on the base panel  5  side, and that the bottom panel  3  is constituted by a circular arc surface which inclines from the front panel  4  toward the base panel  5  side. Thereby, wall surface installation space is made narrower, and when installed near a ceiling, it has been arranged such that such an appearance as a ceiling suspension type is given at a glance. 
     When, however, the top panel  2  and the bottom panel  3  are caused to project forward as described above, it becomes more difficult than a thin type air conditioner to support each panel by means of the base panel  5 , and stiffness of the body cabinet  1  and assembly workability become an issue. 
     Since particularly for a large-sized air conditioner with a width of about 1500 mm, the panel is prone to be warped, it becomes a problem to handle its seam or the like clean. Also, since the air inlet port  4   a  is at an elevated place on the ceiling side, it becomes difficult to clean its filter, and it becomes a problem how maintenance should be facilitated. 
     SUMMARY OF THE INVENTION 
     According to the present invention, in an air conditioner in which the front panel is caused to project forward like the ceiling suspension type in order to reduce the wall surface installation space while being the wall suspension type, it is possible to enhance stiffness of the body cabinet, to enable a reasonable assembly operation to be performed, and to further improve maintainability such as filter cleaning. Also, a body cabinet having less seams and presenting a refined appearance can be obtained. 
     For this reason, the present invention includes several features, and as one of them, there is provided an air conditioner having a body cabinet including: a base panel fixed to an indoor wall surface through predetermined fixing means; a front panel formed like a ship bottom in cross section such that a rear end thereof is latched to a lower end of the base panel and a front end side curves upwardly; and a top panel, the rear end of which is latched to the top end of the base panel and the front end of which is butted against the front end of the front panel, in which on the base panel, a cross flow fan and a box for electric are arranged side by side, and a heat exchanger and a drain pan are mounted; on the side of the rear end of the front panel, there is provided an air outlet port; and the top panel is provided with an air inlet grille having a filter, characterized in that the front end of the top panel is fixed to the drain pan. 
     Thereby, a stiffness of the body cabinet is significantly improved. As a result, it requires a small number of ribs for obtaining strength, and an amount of use of molding material can be reduced. On fixing the top panel, in terms of assembly workability, on the side of the front end of the top panel, there is formed a latching slit; on the drain pan side, there is provided a latching pawl, and a front end of the top panel is preferably fixed to a drain pan by means of a latching slit and a latching pawl. 
     As the latching pawl, there is preferable the latching pawl, which is shaped like a T-character in cross section, at least on one edge of which a pawl to be latched within the latching slit is formed, and the other edge of which is located in the outside of the latching slit as a latch-releasing one, and which is rock-able like seesaw. 
     It is also one of features of the present invention that the drain pan is attachable to or detachable from the base panel, whereby any seriously dirty drain pan portion is removed and can be easily cleaned. 
     As a preferable mode on making the drain pan attachable or detachable, it is advisable to cause a front air direction guide (front-guide) of the base panel to support the drain pan body to be arranged along the lower end of the heat exchanger, and to fit mounts for drain pan to be formed at both ends of the drain pan body in predetermined region on the base panel for holding. 
     The box for electric is detachably provided with a service cover constituting one portion each of the top panel and the base panel respectively in appearance, whereby the maintainability can be improved while the appearance quality is being enhanced. 
     According to the present invention, an air passage along the rear air direction guide (rear-guide) to be formed on the base panel is shortened by an amount corresponding to a height dimension of the base panel to be made smaller, but at a rear end edge of the air outlet port, there is pivotally provided a diffuser continuing to the rear air direction guide, whereby a blast intensifying effect can be promoted. 
     Also, according to another feature of the present invention, in order to facilitate cleaning of a filter, the air inlet grille has a fixed grille formed integrally with the top panel on the side of the rear end of the top panel, and a movable grille provided detachably from the top panel on the side of the front end thereof, and the filter is held by the movable grille and is made attachable to or detachable from the top panel. 
     The filter includes a corrugated filter and a plane filter provided contiguously to one edge of the corrugated filter, and the corrugated filter is preferably held by the movable grille. Also, in order to increase an amount of air draft, it is preferable that the fixed grille is substantially parallel with an indoor ceiling surface and the movable grille is inclined obliquely downward. 
     On both sides of the rear end of the movable grille, there are formed bearing fitting channels which are rotatable and attachable to and detachable from the fixed grill, and between the side of the front end of the movable grille and the top panel, there is provided engagement means consisting of an engagement projection and an elastically deformable engagement pawl, whereby attachment and detachment of the movable grille can be facilitated and the movable grille can be reliably fixed onto the top panel. 
     On the side of the rear end of the movable grille, there is provided a grille retainer to a front end frame of the fixed grille, whereby deformation of the fixed grille can be prevented. The grille retainer is preferably provided with two grille retainers for retaining the front end frame from both upper and lower sides. 
     Also, according to another feature of the present invention, the front panel includes a pair of left and right side plates formed so as to cover both side walls of the base panel; each side wall of the base panel is provided with a front panel guide for guiding the front panel to a latching position with respect to the base panel, and on the inner surface of each side plate of the front panel, there is formed a hook capable of sliding along the front panel guide. 
     It is preferable that the above described front panel guide is an L-character shaped body in cross section including a base plate substantially perpendicular to the side wall and a guide plate bent upwardly from the same base plate and for forming a guide groove with the side wall, and that the hook is an inverted L-character shaped body in cross section including a hook body to be placed on the top end of the guide plate, and an engagement rib bent downward from the same hook body and for entering the guide groove, whereby it is possible to prevent the side plate of the front panel from being opened toward the outside. 
     The front end of the front panel guide on an anti-base panel side is arranged at a lower position near the indoor floor surface than the rear end on the latching position side, and between the front end and the rear end of the front panel guide, there is preferably provided a slope with a predetermined angle, whereby the front panel can be mounted onto the base panel from obliquely below so as to avoid a louver or the like provided on the base panel. 
     In order to further facilitate this mounting, in the hook, there is formed an engagement projection to be inserted and fitted in a latching channel at a latching position of the base panel, and on sliding the hook along the front panel guide, it is preferable to arrange such that the engagement projection runs onto the slope and the front panel is inclined at a predetermined angle. 
     Also, the guide plate is preferably formed such that the groove width of the guide groove is wide on the front end side of the front panel guide on the anti-base panel side and gradually becomes narrower as the rear end side on the latching position side is reached. Thereby, it is possible to facilitate causing the engagement rib of the hook to enter the guide groove, and at a mounting termination position of the front panel, its side plate can be strongly drawn toward the side of the side wall of the base panel. 
     On mounting the front panel onto the base panel from obliquely below, in order to prevent from bumping against the louver or the like, on each side wall of the base panel, there is preferably further provided a restriction guider for preventing the front panel from being lifted up higher than a predetermined height position on mounting the hook on the front panel guide. 
     The front panel has a screwing boss for the base panel on the inner surface on the rear end side thereof, and on mounting the panel, even if the boss abuts against the louver or the like, in order to prevent the panel from being caught in it, the boss is preferably provided with a slope which inclines on the anti-base panel side. 
     According to a preferred aspect of the present invention, in order to increase stiffness of the body cabinet and to improve assembly workability, at a front end of the top panel, there is provided an engagement hole having an elastically deformable engagement pawl therein, and at a front end of the front panel, there is provided an engagement projection which is inserted and fitted in the engagement hole to be captured by the engagement pawl. Also, between the base panel and the front panel, there is also provided uneven fitting means, and a predetermined portion of the front panel is supported by the base panel. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 is an appearance perspective view showing an air conditioner according to an embodiment of the present invention; 
     FIG. 2 is an exploded perspective view showing the air conditioner; 
     FIG. 3 is a perspective view showing a state in which a cross flow fan is mounted onto a base panel of the air conditioner; 
     FIG. 4 is a sectional view showing a state in which no filter has been mounted onto the air conditioner; 
     FIG. 5 is a sectional view showing a different portion from FIG. 4 in a state in which a filter has been mounted onto the air conditioner; 
     FIG. 6 is a sectional view showing a state in which a movable grille is mounted onto the air conditioner; 
     FIG. 7 is an exploded perspective view showing the movable grille and the filter separated; 
     FIG. 8 is a perspective view showing a state in which the movable grille has been caused to hole the filter; 
     FIG. 9 is a perspective view showing a face plate of a top panel on the front end side in the air conditioner; 
     FIG. 10 is perspective view showing an engagement structure of the movable grille to the top panel; 
     FIG. 11 is a perspective view showing structure of the movable grille on a rear end side; 
     FIG. 12 is a perspective view showing a state of a service cover fitted to the air conditioner; 
     FIG. 13 is a perspective view showing a drain pan of the air conditioner; 
     FIG. 14 is an enlarged perspective view showing a latching pawl of the drain pan; 
     FIG. 15 is a perspective view showing a state in which the drain pan and the top panel are coupled together; 
     FIG. 16 is a perspective view showing a state in which the front panel is fitted onto the base panel in the embodiment; 
     FIG. 17 is a perspective view showing a structure of a side wall of the base panel; 
     FIG. 18 is a sectional view for explaining a structure of a front panel guide provided on the base panel; 
     FIG. 19 is a perspective view showing a hook provided on the front panel of the air conditioner; 
     FIG. 20 is a side view for explaining the procedure for fitting the front panel onto the base panel; 
     FIG. 21 is a side view for explaining the procedure for fitting the front panel onto the base panel; 
     FIG. 22 is a side view for explaining the procedure for fitting the front panel onto the base panel; 
     FIG. 23 is a sectional view for explaining a coupled state between the front panel and the top panel; 
     FIG. 24 is an appearance perspective view showing a conventional air conditioner; and 
     FIG. 25 is a sectional view showing an internal structure of the conventional air conditioner. 
    
    
     DETAILED DESCRIPTION 
     Next, with reference to the drawings, the description will be made of embodiments of the present invention. FIG. 1 is an appearance perspective view showing a body cabinet  100  which this air conditioner has, and FIG. 2 is an exploded perspective view showing the body cabinet  100  and various components installed therein. 
     The body cabinet  100  has: a base panel  110  to be fitted onto the wall surface through fittings (not shown); a top panel  200 ; and a front panel  300 , and any of them is made of synthetic resin. Within the body cabinet  100 , there are housed a cross flow fan  400 , a heat exchanger  500 , a drain pan  600  or the like. 
     Referring to the perspective view of FIG. 3 and a sectional view of FIG. 4 together, a major portion of the base panel  110  is occupied by a fan holder  120  to which the cross flow fan  400  is mounted, and sideways the fan holder  120 , a box for electric  140  is formed. At both ends of the fan holder  120 , there are provided bearing holders  121 ,  121 , and the cross flow fan  400  is supported between the bearing holders  121 ,  121  through a radial bearing (not shown). 
     In the box for electric  140 , there is housed a fan motor  410  for driving the cross flow fan  400 . After the cross flow fan  400  and the fan motor  410  are mounted, the bearing holders  121 ,  121  are covered with bearing covers  122 ,  123 . In this case, a bearing cover  123  on the box for electric  140  side is used also as a retainer cover for the fan motor  410 . 
     A rear wall of the fan retainer  120  is formed into a circular arc surface as a rear air direction guide (rear-guide)  124 . Also, a base panel  110  has a front air direction guide (front-guide)  114  to be arranged in front of a cross flow fan  400 , and this front air direction guide  114  and a lower edge of the rear air direction guide  124  form an air outlet port  125 . 
     This air outlet port  125  is provided with an air direction flap for changing the direction of a current of air to be blown from the cross flow fan  400  in an up-and-down direction, and a left-right air louver for changing in the lateral direction, but FIG. 4 shows only the air direction flap  126 . 
     Also, at the rear edge of the air outlet port  125 , there is pivotally provided a diffuser  127  continuing to the rear air direction guide  124 . The diffuser  127  is driven by a motor (not shown), and is opened at maximum in a counter-clockwise direction in FIG. 4, for example, during quick heating or quick cooling. 
     Next, a heat exchanger  500  is mounted onto the base panel  110 . In the present embodiment, the heat exchanger  500  includes two heat exchange units  510 ,  520  which have been combined in a substantially·(lambda) type, and is screwed to the base panel  110  so as to cover the cross flow fan  400 . 
     The base panel  110  is formed with a drain pan  128  for a rear surface-side heat exchange unit  520 . Refrigerant piping for the heat exchanger  500  is drawn out of a groove  129  formed at a position above the box for electric  140  of the base panel  110 . Also, on the upper edge of the base panel  110 , there is provided a latching hole  130  for latching the top panel  200 . The latching hole  130  can be provided at least at one place each left and right. 
     Next, the top panel  200  is mounted onto the base panel  110 . Referring to the sectional views of FIGS. 2 and 5, a latching pawl  201  projecting from the rear end of the top panel  200  is inserted into the latching hole  130 , and with the latching pawl  201  as a proximal end, the top panel  200  is mounted onto the base panel  110  so as to cover the heat exchanger  500 . 
     Referring to FIG. 9 together, on the side of the front end of the top panel  200 , there is formed a face plate  202  extending to the lower end of the front surface-side heat exchange unit  510 . On the side of the lower part of the face plate  202 , there is formed a latching slit  203  for coupling to the drain pan  600 , and on the side of the upper part, there is formed an elastically deformable first latching pawl  204  for fastening the front panel  300 . 
     Referring to FIG. 2 again, on the top panel  200 , an air inlet grille is provided over its entire surface, but in the present invention, the air inlet grille consists of a fixed grille  210  integrally formed on the side of the rear end (base panel  110  side) of the top panel  200 , and a movable grille  220  detachably provided on the side of the front end of the top panel  200 . The fixed grille  210  side of the top panel  200  is substantially parallel with the indoor ceiling surface, and the movable grille  220  side is inclined obliquely below. 
     The top panel  200  is provided with a filter  230 , but in the present embodiment, the movable grille  220  and the filter  230  are arranged in groups of two respectively, and the filter  230  is held by each movable grille  220 . 
     With reference to FIGS. 7 and 8, the description will be made of one of them. The movable grille  220  has a plurality of frames  222  spanned across a pair of left and right side plates  221 , and each side plate  221  is formed with a slit-shaped filter holder  223 . Also, at the front end of each side plate  221 , a latching projection  224  is formed, and correspondingly thereto, the top panel  200  is provided with an elastically deformable second latching pawl  205 , which serves as the other party of the latching projection  224  (See FIG.  10 ). 
     As shown also in FIG. 6, at the rear end of each side plate  221 , there is formed a substantially U-character shaped bearing fitting channel  225  which is rotatable, and attachable to or detachable from a front end frame  211  of the fixed grille  210 . Also, as shown in FIG. 11, on the side of the rear end of the movable grille  220 , there is provided a grille retainer  226  to the front end frame  211  of the fixed grille  210 . 
     In the present embodiment, the grille retainer  226  includes a first retainer  227  inclined obliquely upwardly so as to abut against the top end edge of the front end frame  211 , and a second retainer  228  inclined obliquely downward so as to abut against the lower end edge of the front end frame  211 . The first retainer  227  is arranged at the center of the rear end of the movable grille  220 , and the second retainer  228  each is arranged on both sides of the first retainer  227 . This arrangement prevents the front end frame  211  from lifting. 
     Referring to FIGS. 7 and 8 again, the filter  230  has a corrugated filter  231  and a plane filter  232  provided contiguously to the side of the rear end of the same corrugated filter  231 . The corrugated filter  231  is held by the movable grille  220 , and the plane filter  232  is arranged below the fixed grille  210 . 
     The reason why the plane filter  232  has been used as the filter for the fixed grille  210  is that the height dimension of the body cabinet  100  is reduced. The corrugated filter  231  has pawl pieces  234  at its left and right filter frames, and this pawl piece  234  is hung on the filter holder  223 , whereby the corrugated filter  231  is held by the movable grille  220 . 
     Referring to FIG. 6, in order to set the filter  230  at the top panel  200 , the plane filter  232  is inserted below the fixed grille  210 ; thereafter, the bearing fitting channel  225  of the movable grille  220  is hung on the front end frame  211  of the fixed grille  210 ; and with the front end frame  211  as a proximal end, the movable grille  220  is closed to cause an engagement projection  224  to engage with a second latching pawl  205  on the top panel  200  side. In order to remove the filter  230 , the movable grille  220  can be opened to draw out the entire movable grille  220 . 
     Next, as shown in FIG. 12, the box for electric  140  of the base panel  110  is covered with a service cover  141 . A top surface  142  of this service cover  141  is coordinated with the top panel  200  in design, and constitutes a portion of the top panel  200  in appearance. Also, a side surface  142  of the service cover  141  actually becomes one side surface of the base panel  110 . 
     Although not shown, the service cover  141  is mounted onto the base panel  110  by means of screw, latching pawl or the like. In this respect, an order of installing the service cover  141  onto the base panel  110  may be before or after the top panel  200 . 
     Next, a drain pan  600  is mounted onto the base panel  110  so as to apply the drain pan  600  to the lower end of a front surface-side heat exchange unit  510 . As shown in FIG. 13, the drain pan  600  includes: a gutter-shaped drain pan body  610  extending in a straight line along the lower end of the front surface-side heat exchange unit  510 ; and a pair of left and right mounts for drain pan  620  bent at substantially right angles toward the base panel  110  side from the both ends, and is attachable to or detachable from the base panel  110 . In this respect, the mounts for drain pan  620  are formed with drainage holes although not shown. 
     As shown enlarged in FIG. 14, at the front edge of the drain pan body  610 , there is formed a latching pawl  630  to be latched in a latching slit  203  (See FIG. 9) on the top panel  200  side. This latching pawl  630  is shaped like a T-character in cross section, is rocking-deformable like seesaw and has a hook  633  in each of its edges  631 ,  632 . 
     The drain pan  600  is pressed into the base panel  110 , whereby each tip end of its mounts for drain pan  620 ,  620  is captured by a receiving groove (not shown) provided on the base panel  110  side, the drain pan body  610  is placed on the front air direction guide  114 , and a latching pawl  630  is latched in a latching slit  203 . Its latching state is shown in FIG.  15 . 
     As seen from this figure, one edge  631  of the latching pawl  630  enters the latching slit  203 , and the other edge  632  side is located in the outside of the latching slit  203 . Accordingly, during maintenance such as cleaning, the other edge  632  is pressed down, whereby the latching pawl  630  is disengaged from the latching slit  203  and the drain pan  600  can be easily drawn out of the base panel  110 . In this respect, in the present embodiment, each of the edges  631 ,  632  has a hook  633 , but the hook  633  on the other edge  632  side which has nothing to do with latching may be omitted. 
     Next, the front panel  300  is mounted onto the base panel  110 . As shown in FIG. 16, the front panel  300  includes a pair of left and right side plates  301  formed so as to cover both side walls of the base panel  110 , and the front end  302  side is formed like a ship bottom in cross section which is curved upwardly from the base panel  110  side. 
     The front panel  300  has only an air outlet port  303  which coincides with an air outlet port  125  of the base panel  110  formed on its rear end side, and has no seam at all when viewed from the floor surface side. 
     On each side wall of the base panel  110 , there is provided a front panel guide  131  for guiding the front panel  300  to the latching position, and on the inner surface of each side plate  301  of the front panel  300 , there is formed a hook  310  capable of sliding along the front panel guide  131 . 
     Referring to FIG. 17 together, at the latching position of the base panel  110 , there is provided a latching channel  136  having an elastically deformable latching pawl  135 . In this respect, the side wall of the base panel  110  shown in FIGS. 16 and 17 is actually provided by the service cover  141 . Although not shown, also on the side wall of the base panel  110  on the opposite side, there are similarly formed a front panel guide  131  and a latching channel  136  having an elastically deformable latching pawl  135 . 
     In the present embodiment, the front end  131   a  of the front panel guide  131  on the anti-base panel side is arranged at a lower position near the indoor floor surface than the position of the latching channel  136 , and between the front end  131   a  and the rear end  131   b  of the front panel guide  131 , there is provided a slope  134  at a predetermined angle. 
     As clearly shown in FIG. 18, the front panel guide  131  is constructed as an L-character shaped body in cross section including: a base plate  132  substantially perpendicular to the side wall; and a guide plate  133 , which is bent substantially at right angles upwardly from the base plate  132  and forms a guide groove with the side wall. 
     Also, the guide plate  133  is formed such that the groove width of the guide groove is wide on its front end  131   a  side, and becomes gradually narrower toward the rear end  131   b  side. Further, on the side wall of the base panel  110 , there is provided a restriction guider  137  for preventing the front panel  300  from being lifted higher than a predetermined height position when placing the hook  310  on the front panel guide  131 . 
     Referring to FIG. 19, the hook  310  on the front panel  300  side has: a hook body  311  formed into a block shape to be placed on the top end of the guide plate  133 ; an engagement rib  312  bent downward from the hook body  311  so as to enter the guide groove; and a latching projection  313  projecting from the hook body  311  toward the base panel  110  side. 
     Next, the description will be made of a procedure for mounting the front panel  300 . First, as shown in FIG. 20, the front panel  300  is lifted up to place the hook  310  on the front panel guide  131 , and then the engagement rib  312  is inserted into the guide groove. At this time, since the restriction guider  137  prevents the panel from being lifted further higher than it, the front panel  300  is prevented from bumping against the air direction flap  126 , the diffuser  127  or the like. 
     Thus, when the front panel  300  is pressed in toward the base panel  110 , the latching projection  313  of the hook  310  mounts on the slope  134  of the front panel guide  131  as shown in FIG. 21, and therefore, after the entire front panel  300  is inclined once, the latching projection  313  is conducted by the latching channel  136  to be finally captured by the latching pawl  132  as shown in FIG.  22 . 
     Since in this sliding process of the hook  310 , the groove width of the front panel guide  131  becomes gradually narrower, both side plates  301  of the front panel  300  are drawn toward the side of the side walls of the base panel  110 . Thereby, the front panel  300  is prevented from being opened. 
     Also, as shown in FIG. 22, on the inner surface of the front panel  300  on the rear end side, there is provided a boss  304  for screwing to the base panel  110 . This boss  304  is provided with an inclined plane which inclines toward the anti-base panel side. Even if the boss  304  abuts against the air direction flap  126 , the diffuser  127  or the like when mounting the panel, the inclined plane prevents the boss  304  from being caught in them. 
     Referring to FIG. 23, in order to prevent the front panel  300  from being opened on the front end  302  side, on the inner surface side of the front end  302 , there is provided an engagement projection  301  for being captured by a first latching pawl  204  provided on the top panel  200  side. 
     Also, in order to enhance stiffness of the front panel  300 , the front air direction guide  114 , which forms an air outlet port  125  of the base panel  110 , is provided with an engagement rib  138  as shown in FIG. 4, and correspondingly thereto, at the edge of an air outlet port  303  of the front panel  300 , there is formed an engagement slit  305  as the other party of the engagement rib  138 . 
     The present invention is suitable for a large-sized air conditioner with wide width, but is not limited thereto. Also, the order of mounting (assembling) each member is not limited to the order of the description in the above described embodiment. 
     In the foregoing, the detailed description has been made of the present invention with reference to the specific aspect, but within the scope of the present invention specified in claims, there should be included changes, modifications and equivalent techniques that those skilled in the art who have understood the above described contents can easily perform.