Abstract:
A rear trunk for a vehicle having a rear wall which is inclined with respect to a bottom portion of the trunk such that it overhangs the bottom of the trunk. The opening of the trunk may be narrower than the bottom of the trunk without requiring complicated manufacturing steps. The body of the trunk can be formed in this shape as an integral piece by blow molding. An inner member can be included which divides the interior space of the trunk body into separate compartments, and may be blow molded integrally with the trunk body.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to a vehicular rear trunk suitable for a two-wheeled motor vehicle.  
           [0003]    2. Background Art  
           [0004]    An example of a conventional vehicular rear trunk is disclosed in Japanese Utility Model Publication No. Sho 62-45985. The vehicular rear trunk disclosed in this publication includes a trunk body portion which is disposed behind the seat of a two-wheeled motor vehicle. A lid portion is provided for opening and closing the opening of the trunk body portion, and an electric appliance is accommodated within a rear portion of the interior of the trunk body portion. The vertical, transverse and longitudinal directions used in the present invention are described in reference to a mounted state of the vehicular rear trunk on a vehicle.  
           [0005]    Because the trunk body portion is usually formed by injection molding, it is required that its opening be as large as or larger than its bottom side. However, it is sometimes required that the rear trunk have a narrow upper shape, and that a lower side of its rear wall extend rearwardly to form an inclined surface when viewed from the trunk&#39;s side. In a conventional injection molding process, it is difficult to obtain such a shape, and the freedom of design for the shape is restricted.  
           [0006]    It is possible to obtain such a shape for a trunk body portion in a right-left divided form by molding, but in this case it is necessary to seal and bond the right and left mating portions. This results in a complicated structure, and more time and labor are required for production.  
           [0007]    It would therefore be desirable to construct a trunk body portion having a relatively narrow upper portion without excessive cost and difficulty of manufacture.  
           [0008]    It would also be desirable to construct a trunk body portion which allows for storage of goods separate from vehicle lighting appliances.  
         SUMMARY OF THE INVENTION  
         [0009]    The present invention is in part addressed to overcoming the shortcomings of the prior art and for achieving other advantages not contemplated by the prior art.  
           [0010]    An embodiment of a vehicle trunk according to the present invention includes a trunk body portion in the interior of which is accommodated an electric appliance, such as a light.  
           [0011]    A lid portion opens and closes the opening of the trunk body portion. The trunk body portion has a shape in which the upper portion of the trunk is narrow, with the opening thereof being narrower than the bottom of the trunk. A rear wall of the trunk body portion extends rearwardly on its lower side to form an inclined surface, and an electric appliance receptacle portion is formed below the inclined surface. The trunk body portion is formed by blow molding.  
           [0012]    An inner member may also be provided within the trunk body portion to partition the interior of the trunk body portion into a goods receptacle portion and the electric appliance receptacle portion, the inner member being formed by molding integrally with the trunk body portion.  
           [0013]    According to a first aspect of the invention, a trunk body portion having an upper narrower shape with its opening narrower than its bottom, and having a rear wall formed as an inclined surface with an electric appliance receptacle portion formed therebelow, can be obtained as a single body by blow molding. Thus, the degree of freedom of design can be increased with respect to the shape of the trunk body portion. Also, it is not necessary to adopt a right-left divided form for molding, resulting in a relatively simple structure and permitting easy production of the trunk body portion.  
           [0014]    According to a second aspect of the invention, because the inner member is formed in one piece with the trunk body portion during molding, it is possible to simplify both the trunk structure and the production process. Moreover, because the interior of the trunk body portion is partitioned into the goods receptacle portion and the electric appliance receptacle portion by the inner member, it is possible to store goods separately from the electric appliance.  
           [0015]    Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0016]    The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:  
         [0017]    [0017]FIG. 1 is a side view of a two-wheeled motor vehicle in use;  
         [0018]    [0018]FIG. 2 is an exploded perspective view of the rear trunk;  
         [0019]    [0019]FIG. 3 is a longitudinal sectional view of a rear trunk according to the present invention;  
         [0020]    [0020]FIG. 4 is a plan view of the trunk body portion;  
         [0021]    [0021]FIG. 5 is a rear view of the trunk body portion; and  
         [0022]    [0022]FIG. 6 is a sectional view taken along line  6 - 6  in FIG. 4.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0023]    A rear trunk for use in a two-wheeled motor vehicle according to an embodiment of the present invention will be described below with reference to the drawings.  
         [0024]    As shown in FIG. 1, a rear trunk  1  is disposed behind a tandem seat  2  at a rear position of a two-wheeled motor vehicle. A stop lamp  3  (an electric appliance) is mounted at a lower position of the back of the rear trunk  1  such that a body portion thereof is received in the interior of the rear trunk  1 . A back rest  4  is mounted on an upper front side of the rear trunk  1 .  
         [0025]    As shown in FIG. 2, the rear trunk  1  includes a trunk body portion  5  having an opening, and a lid portion  6  for opening and closing the opening of the trunk body portion. The trunk body portion  5  and the lid portion  6  are connected together by hinges  9  (see FIG. 3) mounted to hinge mounting portions  7  and  8  which are provided on the right and left of front ends of the trunk body portion  5  and the lid portion  6 , respectively.  
         [0026]    As shown in FIG. 3, an opening edge  10  of the trunk body portion  5  is hermetically sealed to a peripheral edge  11  of the lid portion  6  by a seal  12 . The lid portion  6  is locked by a locking device  13  at a rear position of the trunk body portion  5 . A rear wall  14  of the trunk body portion  5  extends rearwardly on its lower side to form an inclined surface, and the rear side of the lid portion  6  is smoothly contiguous to the rear wall  14  in the form of a continuous curved surface.  
         [0027]    An electric appliance receptacle portion  15  is formed below the rear wall  14 , and a body portion of the stop lamp  3  is received in the electric appliance receptacle portion  15 . A lens portion of the stop lamp  3  projects rearwardly from each of the mounting holes  16  (see also FIG. 5) formed in the rear wall  14 . Numeral  17  denotes a key lock which is secured to a rear wall of an inner box  18  together with a lock mechanism portion.  
         [0028]    The inner box  18  is in the shape of a container which opens upwardly. In the interior of the inner box  18  is formed a goods receptacle portion  19 , which is separated from the electric appliance receptacle portion  15 . The area of the opening of the inner box  18  and that of the bottom thereof may be roughly equal to each other. The inner box  18  may be formed, for example, by injection molding using a synthetic resin. The seal  12  is fitted in a groove which is formed in the peripheral edge of the inner box  18 .  
         [0029]    [0029]FIG. 4 is a plan view of the trunk body portion. In FIG. 4, the size of the relatively narrow opening can be seen in relation to the area of the bottom of the trunk body.  
         [0030]    [0030]FIG. 5 is a rear view of a trunk body portion. Mounting holes  16  provide a surface for mounting a stop lamp  3 , the body portion of the stop lamp being received in the electric appliance receptacle portion  15 . Side walls  22  are curved and extend substantially along a longitudinal direction of the trunk body portion  5 .  
         [0031]    The trunk body portion  5  will now be described in detail. As shown in FIG. 6, the trunk body portion  5  has a relatively narrow upper portion such that an opening width W 1  of an opening  20  is smaller than the width W 2  of a bottom  21  (W 1 &lt;W 2 ) in the vehicular longitudinal direction. The trunk body portion forms a body space  25  which may receive the inner box  18 , dividing the body space  25  into two compartments.  
         [0032]    Further, behind the opening  20 , the rear wall  14  is inclined and forms an inclined surface, which therefore assumes an overhang position indicated by the reference mark D relative to the rear end of the bottom  21 .  
         [0033]    By blow-molding a suitable thermoplastic resin such as ABS resin, the trunk body portion  5  is obtained as a single hollow molded product as a whole, with the opening  20  and mounting holes  16  not formed yet therein. After blow molding, the portions corresponding to the opening  20  and mounting holes  16  are cut from the molded product in a post-machining process. The trunk body portion  5  is therefore easily manufactured. The lid portion  6  can also be formed by blow molding so as to have a double-walled structure as shown in FIG. 3.  
         [0034]    As shown in FIG. 3 and other figures, the trunk body portion  5  can be formed as a single body as a whole by blow molding, despite the opening  20  being narrower than the bottom  21 , and despite the rear wall  14  being formed on its lower side as an inclined surface. Despite the shape of the trunk body portion, it is not necessary to adopt a right-left divided form.  
         [0035]    Further, because the goods receptacle portion  19  and the electric appliance receptacle portion  15  are partitioned from each other by the inner box  18  (an inner member), goods in the goods receptacle portion  19  can be stored separately from the stop lamp  3 . Thus, the goods and the stop lamp are less likely to be damaged.  
         [0036]    The electric appliance is not limited to the above example of a stop lamp, but any of various other electric appliances may be employed in the present invention. The inner box  18  may not only be formed as a separate component, but also as one piece with the trunk body portion  5  by blow molding. In this case, the structure not only becomes simpler and production easier, but the trunk body portion  5  itself can be utilized as an inner box.  
         [0037]    For partitioning the interior of the trunk body portion  5  into the goods receptacle portion  19  and the electric appliance receptacle portion  15 , the inner box  18  is not always needed, but it may be omitted and substituted as a partition wall. In this case, the partition wall is optional whether the partition wall is to be integral with or separate from the trunk body portion  5 . The rear trunk of the present invention is applicable not only to two-wheeled motor vehicles but also to various other vehicles.  
         [0038]    The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.